飞利浦220CW9FB／00液晶显示器维修手册

22 inch TFT WXGA LCD Colour Monitor
220CW9FB/00 220CW9FB/69 220CW9FB/75 220CW9FB/93
Chassis: HUDSON 9
Horizontal frequencies 30 - 8 3 kHz
TABLE OF CONTENTS
Description Page Important Safety Notice-------------------------------------2 Technical Data--------------------------------------------- 3~4 Installation------------------------------------------------------5 T roubleshooting-----------------------------------------------6 On Screen Display-----------------------------------------7~8 Lock/unlock, Aging,Factory mode-------------------------9 Philips Pixel Defect Policy ---------------------------------10 Mechanical Instructions -----------------------------11~12 Color adjustment -------------------------------------------13 F AQs (Frequently Asked Questions)--------------14~15 Electrical instruction ---------------------------------16~17 DDC Instructions & Serial Number ----------------18~24 DDC DATA ----------------------------------------------25~26 Firmware Upgrade for CPU- ------------------------27~28 Failure Mode Of Panel - ----------------------------------29
SAFETY
Description Page Wiring Diagram--------------------------------------------30 Block Diagram----------------------------------------------31 Scaler Diagram & C.B.A. ----------------------------32~38 Power Diagram & C.B.A. ---------------------------39~42 Control Diagram & C.B.A. ---------------------------43~44 LED Diagram & C.B.A. ---------------------------45~46 USB Diagram & C.B.A. ---------------------------47~50 General product specification----------------------51~82 Exploded V iew ---------------------------------------------83 Spare/ Recommended P arts List----------------------84 PCBA photos------------------------------------------------85 Repair tips----------------------------------------------86~87 Repair Flow chart-------------------------------------88~90 Safety Test Requirments---------------------------------91
NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOL TAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING.
REFER TO BACK COVER FOR IMPORTANT SAFETY GUIDELINES
Published by Philips Consumer Lifestyle Copyright reserved Subject to modification
JJul 14 2008
GB 312278518160

LCD 2 2 220CW9 220BW 8 LCD
Important Safety Notice
Proper s ervic e and repair is important to the safe, reliable operation of all Philips Consumer Electronics Company equipment. The service procedures recommended by Philips and described in this service manual a re eff ective methods of performing service operations . Some of these service operations require the us e of tools speciall y desi gned for the purpose. The special tools should be used when and as recomm ended. It is im portant to note that this m anual c ontains various CAUTI ONS and NOTICES which should becarefully read in order to m inimize the risk of personal injury to service personnel . The possibility exists that improper service methods may damage the equipment. It is also important to underst and that these CAUTIONS and NOTICES ARE NOT EXHAU STIVE. Philips could not possibly know, evaluate and advise the servic etrade of all conceivable ways i n which service might be done or of the possible hazardous consequences of each way. Consequently, Philips has not undertaken any such broad evaluation. Accordingly, who uses a servi ce procedure or tool which is not recommended by Philips must first satisfy himself thoroughly that neither his safety nor the safe operation of the equipment will be jeopardized by the service method selected. * * Hereafter throughout this manual, Philips Consumer Electronics Company will be referred to as Philips . * *
Take care during handling the LCD module with backlight unit - Must mount the module using mounting holes arranged in four
WARNING
FOR PRODUCTS CONTAINING LASER : DANGER Invisible laser radiation when open. AVOID DIRECT EXPOSURE TO BEAM. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. CAUTION The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT , USE ONLY ORIGINAL MANUFACTURER'S REPLACEMENT PAR TS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF THIS SERVICE MANUAL.
corners. - Do not press on the panel, edge of the frame strongly or electric
Critical components having special safety characteristics are identified with a by the Ref. No. in the parts list and enclosed within a broken line (where several critical components are grouped in one area) along with the safety symbol on the schematics or exploded views. Use of substitute replacement parts which do not have the same speci fied safety characteristic s may create shock, fire, or other hazards . Under no circumstances should the original design be modified or altered without written permission from Philips. Philips assumes no liability, express or implied, arising out of any unauthorized modification of design. Servicer assumes all liability.
shock as this will result in damage to the screen. - Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to the panel. - Protect the module from the ESD as it may damage the electronic circuit (C -MOS). - Make certain that treatment body are grounded through wrist band. - Do not leave the module in high temperature and in areas of high humidity for a long time. - Avoid contact with water as it may as hort circuit within the module. - If the surface of panel become dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may damage the panel.)

220CW9 LCD 3
Technical Data
SEC panel
Type NR. : SEC LTM220M1-L01 Resolution : 1680 x 1050 (WSXGA+) Outside dimensions : 493.7(H) x 320.1(V) Typ. x 17.0(D) Max. Pitch (mm) : 0.282mm x 0.282mm Color pixel arrangement : RGB vertical stripe Display surface : Haze 25% Hard coating (3H) Color depth : 16.7M (6 bit Hi-FRC) Backlight : 4 CCFL Active area (W x H) : 473.76(H) x 296.1(V) mm View angle (CR=10) : =160 for Right/Left (Typ) : =160 for Up/Down (Typ) Contrast ratio : 1000:1 (Typ) White luminance : 300(Typ.) Color gamut : >=72% Gate IC : TOSHIBA Source IC : NEC Response time : Tr + Tf <=5 ms (Typ) Vertical frequency range: 53~76Hz 6 7 8 Red GND Green GND Blue GND 14 15 V-sync Data clock
Input DVI-D connector pin
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Description T.M.D.S. data2T.M.D.S. data2+ T.M.D.S. data2 shield No Connect No Connect DDC clock DDC data No Connect T.M.D.S. data1T.M.D.S. data1+ T.M.D.S. data1 shield No Connect No Connect +5V Power Ground (for +5V) Hot plug detect T.M.D.S. data0T.M.D.S. data0+ T.M.D.S. data0 shield No Connect No Connect T.M.D.S clock shield T.M.D.S. clock+ T.M.D.S. clock-
Scanning frequencies
Hor. : 30 – 83 K Hz Ver. : 56 - 76 Hz Video dot rate : < 210 MHz for VGA and < 170 MHz for DVI, warning message must be displayed while over 165 MHz (supplier to provide accurate scaler bandwidth number) Power input : 90-264 V AC, 50/60 ± 2 Hz Power consumption : <50W maximum, <45W ( typ.) < TBDWatt (with audio) Functions: (1)D-SUB analog R/G/B separate inputs, H/V sync separated, Composite (H+V) TTL level, SOG sync (2) DVI digital Panel Link TMDS inputs, HDCP supported.
Ambient temperature: Power input connection
Power cord length Power cord type
0 °C - 40 °C
: 1.8 M : 3 leads power cord with protective earth plug.
Power management
The monitor must comply with the Microsoft On Now specification, and meet EPA requirements.
Mode HSYNC VSYNC Video Pwr-cons. Indication Rec. time --
Power-On
On
On
active
< 36 W TBD W max. < 0.8 W
Blue LED
Susceptibility of display to external environment
Blinking Blue LED Period: 3sec On, 3sec Off LED Off <3s
Off
Off
Off
blanked
DC Power Off
N/A
< 0.8 W
Operating - Temperature : 0 to 35 degree C - Humidity : 80% max - Altitude : 0-3658m - Air pressure : 600-1100 mBAR Storage - Temperature - Humidity - Altitude - Air pressure
: -20 to 60 degree C : 95% max : 0-12192m : 300-1100 mBAR
Note: recommend at 5 to 35° C, Humidity less than 60 %
PIN No. 1 2 3 4 5
SIGNAL Red Green/ SOG Blue Sense (GND) Cable Detect (GND)
PIN No. 9 10 11 12 13
SIGNAL DDC +3.3V or +5V Logic GND Sense (GND) Bi-directional data H/H+V sync

4
220CW9 LCD
Technical Data
LPL panel
Type NR. : LPL LM220WE1-TLE2/4 Resolution : 1680 x 1050 (WSXGA+) Outside dimensions : 493.7(H) x 320.1 (V) x 16.5(D) mm (Typ.) Pitch (mm) : 0.282mm x 0.282mm Color pixel arrangement : 1680 horizontal By 1050 vertical Pixels. RGB stripe arrangement Display surface : Hard coating (3H), Anti-glare treatment of the front polarizer Color depth : 16.7M colors Backlight : 4 CCFL Active area (W x H) : 21.995 inches(558.673mm) diagonal (Aspect ratio 16:10) View angle (CR>=10) : R/L 170(Typ.), U/D 160(Typ.) Contrast ratio : >1000:1 (Typ) White luminance : 300 cd/m2(Typ. Center 1 point) Color gamut : >=72% Gate IC : N/A Source IC : Magna , OKI Response time : <=5 ms (Typ) Vertical frequency range : 50~75Hz 5 6 7 8 Cable Detect (GND) Red GND Green GND Blue GND 14 15 V-sync Data clock 13 H/H+V sync
Input DVI-D connector pin
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Description T.M.D.S. data2T.M.D.S. data2+ T.M.D.S. data2 shield No Connect No Connect DDC clock DDC data No Connect T.M.D.S. data1T.M.D.S. data1+ T.M.D.S. data1 shield No Connect No Connect +5V Power Ground (for +5V) Hot plug detect T.M.D.S. data0T.M.D.S. data0+ T.M.D.S. data0 shield No Connect No Connect T.M.D.S clock shield T.M.D.S. clock+ T.M.D.S. clock-
Scanning frequencies
Hor. : 30 – 83 K Hz Ver. : 56 - 76 Hz Video dot rate : < 210 MHz for VGA and < 170 MHz for DVI, warning message must be displayed while over 165 MHz (supplier to provide accurate scaler bandwidth number) Power input : 90-264 V AC, 50/60 ± 2 Hz Power consumption : <50W maximum, <45W ( typ.) < TBDWatt (with audio) Functions: (1)D-SUB analog R/G/B separate inputs, H/V sync separated, Composite (H+V) TTL level, SOG sync (2) DVI digital Panel Link TMDS inputs, HDCP supported.
Ambient temperature: Power input connection
Power cord length Power cord type
0 °C - 40 °C
: 1.8 M : 3 leads power cord with protective earth plug
Power management (supplier to input)
The monitor must comply with the Microsoft On Now specification, and meet EPA requirements.
Mode HSYNC VSYNC Video Pwr-cons. Indication Rec. time --
Power-On
On
On
active
< 36 W TBD W max. < 0.8 W
Blue LED
Off
Off
Off
blanked
Blinking Blue LED Period: 3sec On, 3sec Off LED Off
<3s
Susceptibility of display to external environment
Operating - Temperature : 0 to 35 degree C - Humidity : 80% max - Altitude : 0-3658m - Air pressure : 600-1100 mBAR Storage - Temperature - Humidity - Altitude - Air pressure
DC Power Off
N/A
< 0.8 W
: -20 to 60 degree C : 95% max : 0-12192m : 300-1100 mBAR
Note: recommend at 5 to 35° C, Humidity less than 60 %
PIN No. 1 2 3 4
SIGNAL Red Green/ SOG Blue Sense (GND)
PIN No. 9 10 11 12
SIGNAL DDC +3.3V or +5V Logic GND Sense (GND) Bi-directional data

220CW9 LCD
5
Installation
Front View Product Description Accessory Pack Unpack all the parts.? ?
?
Power cord
?
DVI cable (Optional)
1
To switch monitor's power On and Off
VGA cable Connecting to Your PC
EDFU pack
2 3 4 5 6 Input
To access the OSD menu To adjust the OSD menu Change to 4:3 display To change the signal input source. Automatically adjust the horizontal position, vertical position, phase and clock settings / Return to previous OSD level. To adjust brightness of the display SmartImage. There are five modes to be selected: Office Work, Image Viewing, Entertainment, Economy, and Off
1) Connect the power cord to the back of the monitor firmly. (Philips has pre-connected VGA cable for the first installation.
7
8
Rear View?
2) Connect to PC
(a) (b) (c) (d) (e) Turn off your computer and unplug its power cable. Connect the monitor signal cable to the video connector on the back of your computer. Connect the USB cable to the USB port of your computer. Plug the power cord of your computer and your monitor into a nearby outlet. Turn on your computer and monitor. If the monitor displays an image, installation is complete.
1? 2? 3? 4? 5? 6?
USB downstream port? USB upstream port? VGA input? DVI-D input (available for selective models)? AC power input? Kensington anti-thief lock?

6
220CW9 LCD
Trouble shooting
This page deals with problems that can be corrected by a user . If the problem still persists after you have tried thesesolutions, contact Philips customer service representative. Common Problems Having this problem No Picture (Power LED not lit)
Check these items 1.Make sure the power cord is plugged into the power outlet and into the back of the monitor. 2.First, ensure that the power button on the front of the monitor is in the OFF position, then press it to the ON position. 1.Make sure the computer is turned on. 2. Make sure the signal cable is properly connected to your computer. 3.Check to see if the monitor cable has bent pins. 4.The Energy Saving feature may be activated 1. Make sure the monitor cable is properly connected to your computer. (Also refer to the Quick Set-Up Guide). 2.Check to see if the monitor cable has bent pins. 3. Make sure the computer is turned on.
No Picture (Power LED is amber or yellow)
Screen says
AUT O button not working properly
1.The Auto Function is designed for use on standard Macintosh or IBM-compatible PCs running Microsoft Windows. 2. It may not work properly if using nonstandard PC or video card.
Imaging Problems Display position is incorrect 1.Press the Auto button. 2. Adjust the image position using the Horizontal Position and/or V ertical Position in OSD Main Controls. Check that the signal cable is properly connected to the graphics board or PC. 1. Press the Auto button. 2. Eliminate the vertical bars using the More Settings of Phase/Clock in OSD Main Controls.
Image vibrates on the screen V ertical flicker appears
Horizontal flicker appears
1. Press the Auto button. 2. Eliminate the vertical bars using the More Settings of Phase/Clock in OSD Main Controls.
The screen is too bright or too dark
Adjust the contrast and brightness on OSD Main Controls. (The backlight of the LCD monitor has a fixed life span. When the screen becomes dark or begins to flicker , please contact your dealer). If an image remains on the screen for an extended period of time, it may be imprinted in the screen and leave an afterimage. This usually disappears after a few hours. This is characteristic of liquid crystal and is not caused by a malfunction or deterioration of the liquid crystal. The after-image will disappear after a peroid of time. The remaining dots are normal characteristic of the liquid crystal used in today's technology.
An after-image appears
An after-image remains after the power has been turned off. Green, red, blue, dark, and white dots Remains

220CW9 LCD 7
On Screen Display
Description of the On Screen Display What is the On-Screen Display?
On-Screen Display (OSD) is a feature in all Philips LCD monitors. It allows an end user to adjust screen performance or select functions of the monitors directly through an on-screen instruction window. A user friendly on screen display interface is shown as below :
Basic and simple instruction on the control keys.?
In the OSD shown above users can press confirm the choice or change.?
buttons at the front bezel of the monitor to move the cursor,
to

8
220CW9 LCD
On Screen Display
The OSD Tree?
Below is an overall view of the structure of the On-Screen Display. You can use this as a reference when you want to work your way around the different adjustments later on.?
Resolution notification?
This monitor is designed for optimal performance at its native resolution, 1680X1050@60Hz. When the monitor is powered on at a different resolution, an alert is displayed on screen: Use 1680x1050@60Hz for best results. Display of the native resolution alert can be switched off from Setup in the OSD (On Screen Display) menu.

Lock/Unlock,Aging,Factory Mode
220CW9 LCD
9
To Lock/Unlock
OSD FUNCTION(User
Mode)
Access Aging
Mode
The OSD function can be locked by pressing"OK"button(1) for more than 10 seconds, the screen shows following windows for 4 seconds. Every time when you press"OK" button, this message appears on the screen automatically .
Step 1 : Access Factory Mode then enter Factory Menu. Step 2 : By pressing " UP " and " DOWN" key to Burning Icon. Press "MENU " then press " UP " and " DOWN " key to turn on Aging Mode.
Unlock OSD function
Unlocked OSD function can be released by pressing "OK" button for more than 10 seconds again.
Step 3 : Disconnect interface cable between Monitor and PC.
Access Factory Mode
1). Turn off monitor. 2). [Push "AUT O" & "MENU" buttons at the same time and hold them] +[Press "power" button until comes out "Windows screen" ] => then release all buttons 3).Press "MENU" button, wait until the OSD menu with Characters "HUDSON 220SW8 V0.07 2007-12-21 " (below OSD menu) come on the Screen of the monitor. After 3 seconds, bring up:
Factory Mode indicator
Factory Menu
Cursor can move on gray color area Hot key function: by pressing " UP " and " DOWN " key Simultaneously at User Mode (or Factory Mode) (PS: The Of fset R G B function can be used on reduce or eliminate snowy noise on the background when the resolution of video signal is 1680*1050 vertical 60Hz. Slightly increase or decrease the value until snowy noise completely disappear . repeatly Connect Signal cable again=> go back to normal display

10
220CW9 LCD
Philips Pixel Defect Policy
Philips' Flat Panel Monitors Pixel Defect Policy
Philips strives to deliver the highest quality products. We use some of the industry's most advanced manufacturing processes and practice stringent quality control. However, pixel or sub pixel defects on the TFT LCD panels used in flat panel monitors are sometimes unavoidable. No manufacturer can guarantee that all panels will be free from pixel defects, but Philips guarantees that any monitor with an unacceptable number of defects will be repaired or replaced under warranty. This notice explains the different types of pixel defects and defines acceptable defect levels for each type. In order to qualify for repair or replacement under warranty, the number of pixel defects on a TFT LCD panel must exceed these acceptable levels. For example, no more than 0.0004% of the sub pixels on a 19" XGA monitor may be defective. Furthermore, Philips sets even higher quality standards for certain types or combinations of pixel defects that are more noticeable than others. This policy is valid worldwide. Black Dot Defects Black dot defects appear as pixels or sub pixels that are always dark or 'off'. That is, a dark dot is a sub-pixel that stands out on the screen when the monitor displays a light pattern. These are the types of black dot defects:
?
One dark sub pixel? dark sub pixels?
?
Two or three adjacent
Proximity of Pixel Defects
Because pixel and sub pixels defects of the same type that are near to one another may be more noticeable, Philips also specifies tolerances for the proximity of pixel defects. ?
Pixel Defect Tolerances?
Pixels and Sub pixels
A pixel, or picture element, is composed of three sub pixels in the primary colors of red, green and blue. Many pixels together form an image. When all sub pixels of a pixel are lit, the three colored sub pixels together appear as a single white pixel. When all are dark, the three colored sub pixels together appear as a single black pixel. Other combinations of lit and dark sub pixels appear as single pixels of other colors.
In order to qualify for repair or replacement due to pixel defects during the warranty period, a TFT LCD panel in a Philips flat panel monitor must have pixel or sub pixel defects exceeding the tolerances listed in the following tables. ? BRIGHT DOT DEFECTS? MODEL? 1 lit subpixel? 2 adjacent lit subpixels? 3 adjacent lit subpixels (one white pixel)? Distance between two bright dot defects*? Total bright dot defects of all types? ACCEPTABLE LEVEL 220CW9? 3? 1? 0? >15mm? 3?
Types of Pixel Defects ?
Pixel and sub pixel defects appear on the screen in different ways. There are two categories of pixel defects and several types of sub pixel defects within each category. Bright Dot Defects Bright dot defects appear as pixels or sub pixels that are always lit or 'on'. That is, a bright dot is a sub-pixel that stands out on the screen when the monitor displays a dark pattern. There are the types of bright dot defects: ?
?
BLACK DOT DEFECTS? MODEL? 1 dark subpixel? ACCEPTABLE LEVEL ? 220CW9? 5? 2? 0 ? >15mm?
?
Two adjacent lit sub pixels:
?
?
2 adjacent dark subpixels? 3 adjacent dark subpixels? Distance between two black dot defects*?
- Red + Blue = Purple One lit red, green or blue sub pixel? - Red + Green = Yellow - Green + Blue = Cyan (Light Blue)! A red or blue bright dot must be more than 50 percent brighter than neighboring dots while a green bright dot is 30 percent brighter than neighboring dots.? Three adjacent lit sub pixels (one white pixel)?
Total black dot defects of all types?
TOTAL DOT DEFECTS? MODEL? Total bright or black dot defects of all types?
5?
ACCEPTABLE LEVEL ? 220CW9? 5?
Note: * 1 or 2 adjacent sub pixel defects = 1 dot defect

11
220CW9 LCD
Mechanical Instructions
Disassemble the base, press the circular button Bring the hinge Tear off the acetic tape
Disassemble the clip, use a small screw-driver prize up
Draw the ffc cable. Take off the rear cover
Disassemble the stand,
6 screws Tear off these three acetic tapes Take the entire internal mechanism from Bezel and then put it on the cushion. Draw the ffc cable
disassembly the bezel from the monitor, notice the disassembly order : 1.Top (1) parts of bezel 2.Left (2) parts of bezel 3.Bottom (3) parts of bezel 4. Right (4) parts of bezel Don’t draw the BZL
1
Disassembled the rear coverΚ
2 4
C/B screw *2 ,USB screw*1,The other USB screw*1 Then tear off two gaskets on the top of two USB PCBAS.
3
Turn over the monitor ,Uplift the Rear cover from the monitor

12
220CW9 LCD
Mechanical Instructions
Disassembled the Main-BKT : hexagonal screw *4 Disassemble the Power board 4 screws Tear off the cover of AC-SOCKET
Tear off these two AL tapes Disassemble the ITF-board 2 screws
Tear off this Mylar AL tape on the top of lamp cable, Pull out disassemble the lamp cables
Take the PCBA from Main-BKT and then put it on the cushion
Pull out the cable of Power board
Disassemble the
0DLQ
-BKT,

screws
Pull out the LVDS cable
Uplift the Main-BKT unlock the LVDS by using two hands(see note).
Lock of connect Disassembled the
0DLQ 6LGH
-BKT :
screw*4
The locking-latch of LVDS cable’s housing

Color Adjustment
220CW9 LCD 13
Clear image Alignment procedure 1. Turn on the LCD monitor . 2.T urn on the Timing/pattern generator. See Fig.1 3. Preset LCD color Analyzer CA-1 10 -Remove the lens protective cover of probe CA-A30. -Set measuring/viewing selector to measuring position for reset analyzer .(zero calibration) as Fig.2 - Turn on the color analyzer (CA-1 10) -Press 0-CAL button to starting reset analyzer .
Measurement/viewing selector
Fig.5 5.Display Press "UP" or "DOWN" button to select . Change the value by "UP" or "DOWN" key until the X, Y co-ordinates as below
5.1 Whit e colo r adjustment Ther e are t hree f ac tory pres et white c olor 9300K , 6500K , s R G B. Apply full white pattern, with brightnes s in 100 % pos ition and the c ontras t control at 50 % pos ition. The 1931 C IE C hromatic ity (c olor triangle) diagr am (x ,y ) c oordinate for the s creen c enter s hould be:
Production Product SPEC x = 0.345 ± 0.006 y = 0.357 ± 0.006 6500K x = 0.313 ± 0.006 y = 0.329 ± 0.006 7500K x = 0.298 ± 0.006 y = 0.314 ± 0.006 8200K x = 0.291 ± 0.006 y = 0.306 ± 0.006 9300K x = 0.283 ± 0.006 y = 0.297 ± 0.006 11500K x = 0.270 ± 0.006 y = 0.281 ± 0.006 11500K 9300K 8200K 7500K 6500K 5000K x = 0.345 ± 0.02 y = 0.357 ± 0.02 x = 0.313 ± 0.02 y = 0.329 ± 0.02 x = 0.298 ± 0.02 y = 0.314 ± 0.02 x = 0.291 ± 0.02 y = 0.306 ± 0.02 x = 0.283 ± 0.02 y = 0.297 ± 0.02 x = 0.270 ± 0.02 y = 0.281 ± 0.02
Fig. 1
Fig. 2
4. Access Factory Mode
1). Turn off monitor. 2). [Push "AUT O" & "MENU" buttons at the same time and hold them] +[Press "power" button untill comes out "Windows screen" ] => then release all buttons 3).Press "MENU " button, wait until the OSD menu with Characters" HUDSON 240BW8 V0.13 2007-08-10 " (below OSD menu) come on the Screen of the monitor. as shown in Fig3.
5000K
Quality inspect 5000K x = 0.345 ± 0.015 y = 0.357 ± 0.015
Factory Mode indicator Fig. 3 4). Press "MENU" button, then select factory mode indicator by "LEFT" or "RIGHT" button .Press"MENU" button to bring up submenu windows as below:
6500K
x = 0.313 ± 0.015 y = 0.329 ± 0.015
7500K
x = 0.298 ± 0.015 y = 0.314 ± 0.015
8200K
x = 0.291 ± 0.015 y = 0.306 ± 0.015
9300K
x = 0.283 ± 0.015 y = 0.297 ± 0.015
11500K
x = 0.270 ± 0.015 y = 0.281 ± 0.015
Fig. 4

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220CW9 L CD
FAQs (F requently As ked Ques tionis )
G eneral F AQs
Q: When I ins tall my monitor what s hould I do if the s creen s hows 'C annot dis play this video mode'? A: R ecommended video mode for P hilips 22" : 1680x1050 @ 60Hz. 1.Unplug all cables , then connect your P C to the monitor that you us ed previous ly. 2.In the W indows S tart Menu, s elect S ettings /C ontrol P anel. In the C ontrol P anel W indow, s elect the Dis play icon. Ins ide the Dis play C ontrol P anel, s elect the 'S ettings ' tab. Under the s etting tab, in box labeled 'des ktop area', move the s lidebar to 1680x1050 pixels (22"). 3.Open 'Advanced P roperties ' and s et the R efres h R ate to 60H z, then click OK . 4.R es tart your computer and repeat s tep 2 and 3 to verify that your P C is s et at 1680x1050@ 60Hz (22"). 5.S hut down your computer, dis connect your old monitor and reconnect your P hilips LC D monitor. 6.T urn on your monitor and then turn on your P C . Q: What are the .inf and .ic m files on the C D-R OM? How do I ins tall the drivers (.inf and .icm)? A: T hes e are the driver files for your monitor. F ollow the ins tructions in your us er manual to ins tall the drivers . Your computer may as k you for monitor drivers (.inf and .icm files ) or a driver dis k when you firs t ins tall your monitor. F ollow the ins tructions to ins ert the ( companion C D-R OM) included in this package. Monitor drivers (.inf and .icm files ) will be ins talled automatically. Q: How do I adjus t the res olution? A: Your video card/graphic driver and monitor together determine the available res olutions . You can s elect the des ired res olution under W indows ? C ontrol P anel with the "Dis play properties ". Q: What if I get los t when I am making monitor adjus tments ? A: S imply pres s the Menu button, the S etup button, then s elect 'R es et' to recall all of the original factory s ettings . Q: What is the Auto function? A: T he AUT O adjus tment key res tores the optimal s creen pos ition, phas e and clock s ettings by pres s ing of a s ingle button – without the need to navigate through OS D (O n S creen Dis play) menus and control keys . Note: Auto function is available in s elected models only. Q: My Monitor has no power (P ower L E D does not light up). What s hould I do? A: Make s ure the AC power cord is connected between the monitor and AC outlet, and click a key on keyboard/mous e to wake up the P C . Q: W ill the L C D monitor acc ept an interlac ed s ignal under P C models ? A: No. If an Interlace s ignal is us ed, the s creen dis plays both odd and even horizontal s canning lines at the s ame time, thus dis torting the picture. Q: What does the R efres h R ate mean for L C D? A: U nlike C R T dis play technology, in which the s peed of the electron beam is s wept from the top to the bottom of the s creen determines flicker, an active matrix dis play us es an active element (T F T ) to control each individual pixel and the refres h rate is therefore not really applicable to LC D technology. Q: W ill the L C D s creen be res is tant to s cratches ? A: A protective coating is applied to the s urface of the LC D, which is durable to a certain extent (approximately up to the hardnes s of a 2H pencil). In general, it is recommended that the panel s urface is not s ubject to any exces s ive s hocks or s cratches . Q: How s hould I c lean the L C D s urfac e? A: F or normal cleaning, us e a clean, s oft cloth. F or extens ive cleaning, pleas e us e is opropyl alcohol. Do not us e other s olvents s uch as ethyl alcohol, ethanol, acetone, hexane, etc. Q: C an I c hange the c olor s etting of my monitor? A: Y es , you can change your color s etting through OS D control as the following procedures , 1. P res s "Menu" to s how the OS D (O n S creen Dis play) menu 2. P res s "Down Arrow" to s elect the option "C olor" then pres s "OK " to enter color s etting, there are three s ettings as below. a. C olor T emperature; T he s ix s ettings are 5000K , 6500K , 7500K , 8200K , 9300K and 11500K . W ith s ettings in the 5000K range the panel appears ‘warm,' with a red-white color tone, while a 11500K temperature yields ‘cool, blue-white toning." b. s R G B ; this is a s tandard s etting for ens uring correct exchange of colors between different device (e.g. digital cameras , monitors , printers , s canners , etc) c. Us er Define; the us er can choos e his /her preference color s etting by adjus ting red, green blue color. d. G amma; T he five s ettings are 1.8, 2.0, 2.2, 2.4, and 2.6. *A meas urement of the color of light radiated by an object while it is being heated. T his meas urement is expres s ed in terms of abs olute s cale, (degrees K elvin). L ower K evin temperatures s uch as 2004K are red; higher temperatures s uch as 9300K are blue. Neutral temperature is white, at 6504K .
S c reen Adjus tments
Q: When I ins tall my monitor, how do I get the bes t performanc e from the monitor? A: F or bes t performance, make s ure your dis play s ettings are s et at 1680x1050@ 60H z for 22". Q: How do L C Ds compare to C R T s in terms of radiation? A: B ecaus e LC Ds do not us e an electron gun, they do not generate the s ame amount of radiation at the s creen s urface.
C ompatibility with other P eripherals
Q: C an I connect my L C D monitor to any P C , works tation or Mac? A: Y es . All P hilips LC D monitors are fully compatible with s tandard P C s , Macs and works tations . Y ou may need a cable adapter to connect the monitor to your Mac s ys tem. P leas e contact your P hilips s ales repres entative for more information. Q: Are P hilips L C D monitors P lug-and-P lay ? A: Yes , the monitors are P lug-and-P lay compatible with W indows ? 95, 98, 2000, XP and V is ta. Q: What is US B (Univ ers al S erial B us )? A: T hink of U S B as a s mart plug for P C peripherals . U S B automatically determines res ources (like driver s oftware and bus bandwidth) required by peripherals . US B makes neces s ary res ources available without us er intervention. T here are three main benefits of US B . US B eliminates "cas e anxiety," the fear of removing the computer cas e to ins tall circuit board cards -- that often requires adjus tment of complicated IR Q s ettings -- for add-on peripherals . US B does away with "port gridlock." W ithout U S B , P C s are normally limited to one printer, two C om port devices (us ually a mous e and modem), one E nhanced P arallel P ort add-on (s canner or video camera, for example), and a joys tick. More and more peripherals for multimedia computers come on the market every day. W ith US B , up to 127 devices can run s imultaneous ly on one computer. US B permits "hot plug-in." No need to s hut down, plug in, reboot and run s et up to ins tall peripherals . No need to go through the revers e proces s to unplug a device. B ottom line: US B trans forms today's "P lug-and-P ray" into true P lug-and-P lay! P leas e refer to glos s ary for more information about US B . Q: What is a US B hub ? A: A US B hub provides additional connections to the U nivers al S erial B us . A hub's ups tream port connects a hub to the hos t, us ually a P C . Multiple downs tream ports in a hub allows connection to another hub or device, s uch as a US B keyboard, camera or printer.

220CW9 L CD
15
FAQs (F requently As ked Ques tionis )
L C D P anel Tec hnology
Q: What is a L iquid C ry s tal Dis play ? A: A Liquid C rys tal Dis play (LC D) is an optical device that is commonly us ed to dis play AS C II characters and images on digital items s uch as watches , calculators , portable game cons oles , etc. LC D is the technology us ed for dis plays in notebooks and other s mall computers . L ike light-emitting diode and gas -plas ma technologies , LC D allows dis plays to be much thinner than cathode ray tube (C R T ) technology. LC D cons umes much les s power than LE D and gas -dis plays becaus e it works on the principle of blocking light rather than emitting it. Q: What differentiates pas s ive matrix L C Ds from activ e matrix L C Ds ? A: An LC D is made with either a pas s ive matrix or an active matrix dis play grid. An active matrix has a trans is tor located at each pixel inters ection, requiring les s current to control the luminance of a pixel. F or this reas on, the current in an active matrix dis play can be s witched on and off more frequently, improving the s creen refres h time (your mous e pointer will appear to move more s moothly acros s the s creen, for example). T he pas s ive matrix LC D has a grid of conductors with pixels located at each inters ection in the grid. Q: What are the adv antages of T F T L C D compared with C R T ? A: In a C R T monitor, a gun s hoots electrons and general light by colliding polarized electrons on fluores cent glas s . T herefore, C R T monitors bas ically operate with an analog R G B s ignal. A T F T LC D monitor is a device that dis plays an input image by operating a liquid crys tal panel. T he T F T has a fundamentally different s tructure than a C R T: E ach cell has an active matrix s tructure and independent active elements . A T F T LC D has two glas s panels and the s pace between them is filled with liquid crys tal. W hen each cell is connected with electrodes and impres s ed with voltage, the molecular s tructure of the liquid crys tal is altered and controls the amount of inlet lighting to dis play images . A T F T LC D has s everal advantages over a C R T, s ince it can be very thin and no flickering occurs becaus e it does not us e the s canning method. Q: Why is vertical frequency of 60Hz optimal for an L C D monitor? A: U nlike a C DT monitor, the T F T LC D panel has a fixed res olution. F or example, an XG A monitor has 1024x3 (R , G, B ) x 768 pixels and a higher res olution may not be available without additional s oftware proces s ing. T he panel is des igned to optimize the dis play for a 65MHz dot clock, one of the s tandards for XG A dis plays . S ince the vertical/horizontal frequency for this dot clock is 60H z/48kH z, the optimum frequency for this monitor is 60H z. Q: What kind of wide-angle technology is available? How does it work? A: T he T F T LC D panel is an element that controls /dis plays the inlet of a backlight us ing the dual-refraction of a liquid crys tal. Us ing the property that the projection of inlet light refracts toward the major axis of the liquid element, it controls the direction of inlet light and dis plays it. S ince the refraction ratio of inlet light on liquid crys tal varies with the inlet angle of the light, the viewing angle of a T F T is much narrower than that of a C DT. Us ually, the viewing angle refers to the point where the contras t ration is 10. Many ways to widen the viewing angle are currently being developed and the mos t common approach is to us e a wide viewing angle film, which widens the viewing angle by varying the refraction ratio. IP S (In P lane S witching) or MVA (Multi Vertical Aligned) is als o us ed to give a wider viewing angle. Q: Why is there no flick er on an L C D Monitor? A: Technically s peaking, LC Ds do flicker, but the caus e of the phenomenon is different from that of a C R T monitor -- and it has no impact of the eas e of viewing. F lickering in an LC D monitor relates to us ually undetectable luminance caus ed by the difference between pos itive and negative voltage. On the other hand, C R T flickering that can irritate the human eye occurs when the on/off action of the fluores cent object becomes vis ible. S ince the reaction s peed of liquid crys tal in an LC D panel is much s lower, this troubles ome form of flickering is not pres ent in an L C D dis play. A: B ecaus e you activate T heft Deterrence function in S martC ontrol II. P leas e contact IT manager or P hilips S ervice C enter. Q: Why is an L C D monitor virtually low of E lectro Magnetic Interferenc e? A: U nlike a C R T, an LC D monitor does not have key parts that generate E lectro Magnetic Interference, es pecially magnetic fields . Als o, s ince an LC D dis play utilizes relatively low power, its power s upply is extremely quiet.
E rgonomic s , E c ology and S afety S tandards
Q: What is the C E mark? A: T he C E (C onformité E uropéenne) mark is required to be dis played on all regulated products offered for s ale on the E uropean market. T his 'C E ' mark means that a product complies with the relevant E uropean Directive. A E uropean Directive is a E uropean 'L aw' that relates to health, s afety, environment and cons umer protection, much the s ame as the U.S . National E lectrical C ode and UL S tandards . Q: Does the L C D monitor conform to general s afety s tandards ? A: Y es . P hilips LC D monitors conform to the guidelines of MP R -II and T C O 99/03 s tandards for the control of radiation, electromagnetic waves , energy reduction, electrical s afety in the work environment and recyclability. T he s pecification page provides detailed data on s afety s tandards . Q: After I c hange new P C , I found this information on s creen, how can I do?

16
220CW9 LCD
Electrical Instructions
1. Electrical characteristics 1.1 Interface signals 1). D-Sub Analog Input signal: Video, Hsync., Vsync Video: 0.7 Vp-p, input impedance, 75 ohm @DC Sync.: Separate sync TTL level , input impedance 2.2k ohm terminate Hsync Positive/Negative Vsync Positive/Negative Composite sync TTL level, input impedance 2.2k ohm terminate (Positive/Negative) Sync on green video 0.3 Vp-p Negative (Video 0.7 Vp-p Positive) 2). DVI-D Digital Input signal: Single TMDS link (Three channels: RX0-/+, RX1-/+, RX2-/+) 3). USB PLUG USB port (1 upstream, 1 downstream) 1.2 Interface 1.2.1 D-Sub Cable Length : 1.8 M +/- 50 mm Fix with monitor when packing, with transplant pin protective cover. Connector type : D-Sub male with DDC2B pin assignments. Blue connector thumb-operated jack screws 1.2.2 DVI Cable The input signals are applied to the display through DVI-D cable. Length : 1.8 M +/- 50 mm Connector type : DVI-D male with DDC-2B pin assignments White connector thumb-operated jackscrews With transplant pin protective cover. 1.3 Timing requirement 1.3.1 Mode storing capacity Factory preset modes : 13 Preset modes User modes : 50 : 10
1.3.2 Factory preset modes (18 modes)

Electrical Instructions
220CW9 LCD
17
2. White color adjustment There are three factory preset white color 9300K, 6500K, sRGB. Apply full white pattern, with brightness in 100 % position and the contrast control at 50 % position. The 1931 CIE Chromaticity (color triangle) diagram (x,y) coordinate for the screen center should be:
Production 5000K x = 0.345 ± 0.006 y = 0.357 ± 0.006 6500K x = 0.313 ± 0.006 y = 0.329 ± 0.006 7500K x = 0.298 ± 0.006 y = 0.314 ± 0.006 8200K x = 0.291 ± 0.006 y = 0.306 ± 0.006 9300K x = 0.283 ± 0.006 y = 0.297 ± 0.006 11500K x = 0.270 ± 0.006 y = 0.281 ± 0.006
Product SPEC 5000K x = 0.345 ± 0.02 y = 0.357 ± 0.02 6500K x = 0.313 ± 0.02 y = 0.329 ± 0.02 7500K x = 0.298 ± 0.02 y = 0.314 ± 0.02 8200K x = 0.291 ± 0.02 y = 0.306 ± 0.02 9300K x = 0.283 ± 0.02 y = 0.297 ± 0.02 11500K x = 0.270 ± 0.02 y = 0.281 ± 0.02
Quality inspect 5000K x = 0.345 ± 0.015 y = 0.357 ± 0.015 6500K x = 0.313 ± 0.015 y = 0.329 ± 0.015 7500K x = 0.298 ± 0.015 y = 0.314 ± 0.015 8200K x = 0.291 ± 0.015 y = 0.306 ± 0.015 9300K x = 0.283 ± 0.015 y = 0.297 ± 0.015 11500K x = 0.270 ± 0.015 y = 0.281 ± 0.015

18
220CW9 LCD
DDC Instructions
DDC Data Re-programming In case the DDC data memory IC or main EEPROM which storage all factory settings were replaced due to a defect, the serial numbers have to be re-programmed "Analog DDC IC, Digital DDC IC & EEPROM". It is advised to re-soldered DDC IC and main EEPROM from the old board onto the new board if circuit board have been replaced, in this case the DDC data does not need to be re-programmed. Additional information Additional information about DDC (Display Data Channel) may be obtained from Video Electronics Standards Association (VESA). Extended Display Identification Data(EDID) information may be also obtained from VESA. Configuration and procedure "PI-EDID" The software is provided by IMS to upgrade the firmware of CPU. PI-EDID Tools is for the interface between "Parallel Port of PC" and "15 pin-D-SUB connector of Monitor". It is a windows-based program, which cannot be run in MS-DOS. System and equipment requirements 1. An Pentium (or above) personal computer or compatible. 2. Microsoft operation system Windows 95/98/2000/XP and Port95NT.exe. 3. EDID Software "PI-EDID.exe" 4. ISP boardas shown in Fig. 1 And I2C Board Jump wire should follow J10 (short), J9 (open), J5/J6/ (1and 2 pin short) J7/J8 (1 and 2 pin short)
3 2 1 1 2 3
Connected to print cord and
Connected to Display Signal Fig.1

DDC Instructions
220CW9 LCD
19
5. Connect and Mains cord to Monitor as shown in Fig.2.
Fig.2
Fig. 2a

20
220CW9 LCD
DDC Instructions
6. Setup the Philips-IMS EDID Tools program Step 1: Make a folder in your PC as shown in Fig. 3. For example: C:\EDID Step 2: Copy PI-EDID Software into your folder as shown in Fig.3.
Fig.3 Step 3: Copy the LCD_Analog.ddc and LCD_DVI.ddc to C:\EDID as shown in Fig. 4 .
Fig.4

LED显示屏控制软件操纵使用说明(灵信V3.3)

第一章概述 1.1 功能特点 《LED Player V3.3》是本公司新推出的一套专为LED显示屏设计的功能强大,使用方便,简单易学的节目制作、播放软件，支持多种文件格式：文本文件，WORD文件，图片文件（BMP／JPG／GIF／JPEG．．．），动画文件（SWF ／Gif）。 2.2 运行环境 操作系统 中英文Windows/7/NT/XP 硬件配置 CPU: 奔腾600MHz以上 内存:128M 相关软件 OFFICE2000--如需WORD文件必须安装

第二章安装与卸载 2.1 安装 《LED Player》软件安装很简单，操作如下：将LED Player播放软件的安装光盘插入电脑光驱，即可显示LED Player播放软件的安装文件，双击LED Player，即可实现轻松安装。 《LED Player》软件安装成功后，在【开始】/【程序】里将出现“LED软件”程序组，然后进入该程序组下的“LED Player”,单击即可运行，如图所示， opyright ? 2005-2007 Listen tech. All Rights Reserved 灵感设计诚信 同时，桌面上也出现“LED Player”快捷方式：如右图所示，双击它同样可以启动程序。

2.2 卸载 《LED Player》软件提供了自动卸载功能，使您可以方便地删除《LED Player》的所有文件、程序组和快捷方式，用户可以在“LED软件”组中选择“卸载LED Player”，也可在【控制面板】中选择【添加/删除程序】快速卸载. 第三章使用详解 3.1 节目组成 每块显示屏由一个或多个节目页组成。节目页是用来显示用户所要播放的文本、图片、动画等内容。区域窗口有十一种：图文窗、文本窗、单行文本窗、静止文本窗、时间窗、正计时窗、倒计时窗、模拟时钟窗、表格窗、动画窗、温度窗。 文件窗：可以播放各种文字、图片、动画、表格等几十种文件。 文本窗:用于快速输入简短文字，例如通知等文字。 单行文本窗：用于播放单行文本，例如通知、广告等文字。 静止文本窗：用于播放静止文本，例如公司名称、标题等文字。 时间窗：用于显示数字时间。 计时窗：用于计时，支持正/倒计时显示。

2020年心脏电除颤技术操作规程(课件)

2020年心脏电除颤技术操作规 程（课件） 心脏电除颤技术操作规程 【目的】 用较强的脉冲电流通过心脏来消除心律失常,使之恢复窦性心律。 【评估】 1、患者心电监护波形、操作环境。 2、患者病情、意识、合作程度。 3、电除颤部位皮肤情况及是否装有起搏器。 【准备】 1、护士按要求着装。 2、物品心电除颤、心电监护仪、导电膏、盐水纱布数 块、急救车、卫生纸、快速手消液、污物桶、护理记录单。 3、环境安静、安全。 4、体位去枕平卧位,暴露胸部。 【方法】 巡视病房—发现患者心律失常（为室颤）--呼叫医生—准备除颤仪及急救车推至床旁—将除颤器插上电源—打开除颤器-患者取去枕平卧位—解开患者衣扣，暴露胸部-取

下电极片—检查导电膏有效期—将除颤器两侧的电极板分别涂以专用导电膏，或在患者除颤部位垫上5－6层盐水纱布—选择非同步直流电除颤-选择除颤能量（单向波３60J，双向波２0０J)－-将电极板置于标准位置【常规位置：STERNUM（左手）一块在胸骨右缘第二肋间，（右手）APEX一块在左侧腋中线与第五肋间交界处(心尖部）】—-按充电电钮，迅速充电至所需能量—让床旁其他人员离开患者及病床—电击时两拇指同时按压电极板上的放电按钮（放电前大声呼叫“1、2、3放电”,电极板紧贴皮肤病加压）—－固定电极板—观察示波器上患者的心律恢复正常，生命体征正常，判断电复律成功(如不成功行心肺复苏5个循环后在进行除颤）--撤离电极板,关闭除颤器—用卫生纸擦拭患者胸前区导电膏-为患者行心电监护—扣上患者衣扣,整理床单元，协助患者取舒适卧位—用卫生纸擦拭电极板上的导电膏—消毒双手—观察患者心律、血压、呼吸、脉搏、意识—记录—遵医嘱进行后续治疗—分离除颤器电源—推除颤器及急救车回治疗室-整理用物—除颤器擦拭干净后充电备用—洗手。......感谢聆听 【评价】 1、选择除颤方式正确。 2、患者体位摆放正确。 3、除颤能量选择正确。

DSP课程设计---液晶显示器控制显示

一、设计题目：液晶显示器控制显示 (1) 二、设计目的与步骤： (1) 2.1、 (1) 2.2、 (1) 三、设计原理： (2) 3.1、扩展IO接口： (2) 3.2、液晶显示模块的访问、控制是由VC5416 DSP对扩展接口的操作完成.. 2 3.3、液晶显示模块编程控制： (2) 3.4、控制I/O口的寻址： (2) 3.5、显示控制方法： (2) 3.6．液晶显示器与DSP的连接： (4) 3.7、数据信号的传送： (4) 四、 CCS开发环境 (5) 4.1、 (5) 4.2、 (6) 五、C语言程序 (8) 六、实验结果和分析 (15) 6.1、 (15) 6.2、 (16) 6.3、 (16) 6.4、 (16) 七、设计收获及体会 (17)

一、设计题目：液晶显示器控制显示 二、设计目的与步骤： 2.1、设计目的 通过实验学习使用VC5416 DSP的扩展I/O端口控制外围设备的方法，了解液晶显示器的显示控制原理及编程方法。 2.2、设计步骤 1．实验准备： ⑴连接实验设备：请参看本书第三部分、第一章、二。 2．设置Code Composer Studio 2.21在硬件仿真(Emulator)方式下运行： 3．启动Code Composer Studio 2.21： 选择菜单Debug→Reset CPU。 4．打开工程文件：浏览LCD.c文件的内容，理解各语句作用 工程目录：C:\ICETEK\VC5416AES61\VC5416AES61\Lab0403-LCD\LCD.pjt。5．编译、下载程序。 6．运行程序观察结果： 7将内层循环中的 “CTRLCDLCR=( nBW==0 )?(ledkey[nCount][i]):(~ledkey[nCount][i]);”语句改为“CTRLCDRCR=( nBW==0 )?(ledkey[nCount][i]):(~ledkey[nCount][i]);”，重复步骤5-6，实现在屏幕右侧显示。 8．更改程序中对页、列的设置，实现不同位置的显示。

液晶电视黑屏维修

现在的液晶电视越来越便宜，但随之而来的是故障率也不少，一般来说，液晶电视机的故障比较集中表现在黑屏，亮线等等，现在就说说黑屏故障维修的具体方法。 1.引起黑屏问题有多种原因： 首先是电源电路不正常引起：表现为按面板按键无任何反应，指示灯不亮，先查12V电压正常否，跟着查5V电压正常否，因为A/D驱动板的信号处理部分的芯片的工作电压都是5V，所以查找开不了机的故障时,先用万用表测量5V 电压，如果没有5V电压或者5V电压变得很低； 那么一种可能是电源电路输入级出现了问题，也就是说12V转换到5V的电源部分出了问题，这种故障很常见，一般是烧保险或者是稳压芯片出现故障，有部分机器是把开关电源内置，输出两组电源，其中一组是5V，供信号处理用，另外一组是12V提供高压板点背光用，如果开关电源部分电路出现了故障会有可能导致两组电源均没输出。 另一种可能就是5V的负载加重了，把5V电压拉得很低，换一种说法就是

说，后级的信号处理电路出了问题，有部分电路损坏，引起负载加重，把5V电压拉得很低，逐一排查后级出现问题的元件，替换掉出现故障的元件后，5V能恢复正常，故障一般就此解决，也经常遇到5V电压恢复正常 后还不能正常开机的，这种情况也有多种原因，一方面是MCU的程序被冲掉可能会导致不开机，还有就是MCU本身损坏，比如说MCU的I/O口损坏。 2.电源正常，按面板的按键反应也正常，屏幕黑屏： 遇到这种故障就要充分发挥维修人员细心的本性，仔细观察，逐一排查，按键能正常起作用就说明A/D驱动板的MCU还是能正常工作，也就进一步说明电源部分工作还是正常的，黑屏是由于背光没有点亮，有可能是驱动背光的电路出现了问题； 因此我们首先要把显示器连到主机开机检查，近屏幕仔细观察，如果看到显示很微暗的图象，就证明A/D驱动板的信号处理部分的电路是正常的，问题锁定在驱动背光的高压板及控制高压板开关的功能电路上。

飞利浦除颤仪基本知识

除颤起搏监护仪基本知识 一、中文名称：飞利浦心电监护除颤仪 二、型号：M4735A 三、生产厂商：美国飞利浦北京友康科技有限公司 四、购买年限：2011年12月 五、配套物品：主机、导电凝胶、专用电池、充电器 六、应用简介 1、飞利浦M4735A 除颤起搏监护仪 （Philips HEARTSTART XL M4735A ） 主 要功能：除颤监护仪+起博+血氧+AED 功能参数 具有手动和AED 操作，可选报警上下限，EL 电致发光显示屏，可打印，数据存储，事件概要，事件标记，具有除颤、起博、心电、血氧、等等功能；我院无起搏功能配置。 2、心电除颤仪主要应用于抢救治疗严重快速心律失常病人，如心房扑动、心房纤颤、室上性或室性心动过速等。能消除某些心律紊乱，使心律恢复正常，也可提供无创的起搏。使用人员为受过专业训练的医护人员，并在医师的指令下使用。

六、M4735A主界面 七、M4735A构造介绍-后视图

八、M4735A 除颤手柄构造介绍 九、除颤的正确位置

九、操作流程： 1、开机 2、能量选择 3、涂上导电凝胶 4、选择除颤 5、检查除颤手柄是否与病人皮肤接触良好 6、按上手柄黄色按钮充电 7、同时按动两个手柄上的红色按钮放电 8、CPR 9、除颤有效连接导联线监护 十、注意事项： 1、除颤前确认患者除颤部位无潮湿、无敷料，避开伤口 2、两电极板间距离不少于10cm。如患者带有植入性起搏器，应避开起搏器部位 2.54cm(尽可远离) 3、除颤时无导电糊可用8层以上生理盐水纱布代替 4、除颤前确认操作者本身不能与患者和金属类物品接触，周围人无直接或者间接与患者接触。

液晶显示器电源工作原理及维修40263

液晶显示器电源工作原理及维修 详细介绍液晶显示器电源的作用、工作原理、维修及代换， 一、电源的作用 1、电源的基本知识 液晶电源的作用是为整机提供能量，常见的电源适配器外观如图所示 它的输入是220V交流电，输出为12V、4A直流电。电源适配器的内部电路结构如图所示

2、液晶电源的常见存在形式 常见的液晶电源有内置式和外置式两种。内置式电源一般是和高压板做在一起，形成二合一电源板，驱动板需要的各路电压均有电源板产生。外置式电源也就是通常所说的电源适配器，它一般是220V交流电输入，12V直流电输出，驱动板需要的其他电原在驱动板上进行变换。 二、电源的工作原理 由于LCD采用低电压工作，而一般市电提供提是110V或220V的交流电压，因此显示器需要配备电源。电源的作用是将市电的220V交流电压转变成12V或其它低压直流电，以向液晶显示器供电。 LCD显示器中的电源部分均采用开关电源。由于开关电源具有体积小、重量轻、变换效率高等优点，因此被广泛应用于各种电子产品中，特别是脉宽调制（PWM）型的开关电源。PW M型开关电源的特点是固定开关频率、通过改变脉冲宽度的占空比来调节电压。 PWM开关电源的基本工作原理是：交流电220V输入电源经整流滤波是路变成300V直流电压，再由开关功率管控制和高频变压器降压，得到高频矩形波电压，经整流滤波后获得显示器所需要的各种直流输出电压。脉宽调制器是这类开关电源的核心，它能产生频率固定具脉冲宽度可调的驱动信号，控制开关功率管的导通与截止的占空比，用来调节输出电压的高低，从而达到稳压的目的。 以下将要介绍的电源适配器就是此类开关电源，我们以采用UC3842脉宽调制集成控制器的电源为例讲解相关电路。 1、UC3842的性能特点 （1）它属于电流型单端PWM调制器，具有管脚数量少，外围是路简单、安装调试方便、性能优良、价格低廉等优点。而且通过高频变压器与电网隔离，适合构成无工频变压器的20-50W小功率开关电源。 （2）最高开关频率为500KHZ，频率稳定度高达0.2%。电源效率高，输出电流大，能直接驱动双极型功率晶体管或VMOS管、DMOS管、TMOS管工作。 （3）内部有高稳定的基准电压源，档准值为5V，允许有+0.1%的偏差，温度系数为

dsp实验报告 哈工大实验三 液晶显示器控制显示实验

实验三液晶显示器控制显示实验 一. 实验目的 通过实验学习使用2407ADSP 的扩展I/O 端口控制外围设备的方法，了解液晶显示器的显示控制原理及编程方法。 二. 实验设备 计算机，ICETEK-LF2407-EDU 实验箱。 三.实验原理 ICETEK-LF2407-A 是一块以TMS320LF2407ADSP 为核心的DSP 扩展评估板，它通过扩展接口与实验箱的显示/控制模块连接，可以控制其各种外围设备。 液晶显示模块的访问、控制是由2407ADSP 对扩展I/O 接口的操作完成。 控制I/O 口的寻址：命令控制I/O 接口的地址为0x8001，数据控制I/O 接口的地址为0x8003 和0x8004，辅助控制I/O 接口的地址为0x8002。 显示控制方法： ◆液晶显示模块中有两片显示缓冲存储器，分别对应屏幕显示的象素，向其中写入数 值将改变显示，写入“1”则显示一点，写入“0”则不显示。其地址与象素的对应 方式如下： ◆发送控制命令：向液晶显示模块发送控制命令的方法是通过向命令控制I/O 接口 写入命令控制字，然后再向辅助控制接口写入0。下面给出的是基本命令字、解释 和 C 语言控制语句举例。 ?显示开关：0x3f 打开显示；0x3e 关闭显示； ?设置显示起始行：0x0c0+起始行取值，其中起始行取值为0 至63； ?设置操作页：0x0b8+页号，其中页号取值为0-7； ?设置操作列：0x40+列号，其中列号为取值为0-63； ◆写显示数据：在使用命令控制字选择操作位置(页数、列数)之后，可以将待显示的 数据写入液晶显示模块的缓存。将数据发送到相应数据控制I/O 接口即可。

液晶显示器基本构造

液晶显示器基本构造

液晶显示器基本构造1．产品分类 液晶显示器无源方 有源方 反射型 半透型 透射型 TN ( 扭曲向列 HTN （高扭曲向 标准及订制 STN （超扭曲向 FTN （格式化超 D – TFD （数字 正性 / 负性 REC TNR 彩色偏光片 彩色印刷 特别产 TFT （薄膜晶体

2．客户订制液晶屏 为满足客户不同的应用要求，清显公司为客户提供从图案设计到成品制造的技术支持。 1．确定玻璃尺寸2．选择连接方式3．选择显示方式 4．选择视角5．选择偏光片类型6．驱动与特性7．彩色液晶显示技术8．开始设计根据产品的实际应 金属 脚 TN HT 6点 反 射 驱动 彩色 印刷

第一步：确定玻璃尺寸 1．确定玻璃尺寸 经济玻璃 LCD是从 大玻璃上切割而得的，而大玻璃的尺寸 1．1 0.7 0.55 0.4 用于 传呼 用于 手表， 传呼 多用于手 一般用 途。如电 子记事 薄，视听 产品，家

注：玻璃厚度不同，价格也不同。一般来讲，玻璃越薄，价格越贵。 第二步：选择连接方式： 可以用几种方法将LCD与PCB（印刷线路板）连接。用户应当结合产品的应用场合，性能要求，加工条件等，选择合适的连接方式

第三步：选择显示方式 3 选 择 显 示 方 式 TN （扭曲FTN （格式 STN （超扭 HTN （高扭 正性与负 在TN 型的LCD 中，向列型液晶分子被夹在两块透明玻璃之间。在上下两片玻璃上液晶分子的取 向偏转90°。在上下玻璃的外侧贴偏光片。此种类型LCD 的显示特点是对比度高。动态驱动性能佳。功耗低，驱动电压低。因而是一种通常采用的LCD 由于显示能力所限，TN 型的LCD 在大容量显示时无法得到较好的对比度。于是，液晶分子的扭曲角度从90°被改为110°.我们把这种类型的LCD 叫做HTN （高级扭曲向列型）。HTN 型的LCD 比TN 的LCD 动态驱动性能优良，可用于DUTY 为1/8 ∽ 1/16驱动性能优良。 由于显示能力所限，TN 型的LCD 在大容量显示时无法得到较好的对比度。于是，液晶分子的扭 曲角度从90°被改为210°~ 255°.我们把这种类型的LCD 叫做STN （超级扭曲向列型）。STN 型的LCD 比TN 的LCD 动态驱动性能优良，可用于大型显示。如640 X 480象素（点）等等 在STN 用于大型显示时，会出现色彩问题。FTN 型LCD 则可以实现黑白显示，并具有更好的对比度 在STN 用于大型显示时，会出现色彩问题。FTN 型LCD 则可以实现黑 白显示，并具有更好的对比度 正性 负性

液晶显示器维修手册

North/Latin America https://www.sodocs.net/doc/7b5366126.html, Europe/Africa https://www.sodocs.net/doc/7b5366126.html, Asia/Oceania https://www.sodocs.net/doc/7b5366126.html, COLOR MONITOR SERVICE MANUAL MODEL: E2360S (E2360S-PN W.A**NAP for LGD LM230WF5-TRA1)/ E2360T (E2360T-PN W.A**NAP forLGD LM230WF5-TRA1) **Sales Market CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. *To apply the M-STAR Chip.

Copyright ? 2010 LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only CONTENTS SPECIFICATIONS ..........................................................2 PRECAUTIONS ..............................................................3 TIMING CHART ..............................................................7 DISASSEMBLY .............................................................8 BLOCK DIAGRAM.........................................................10 DISCRIPTION OF BLOCK DIAGRAM . (12) ADJUSTMENT ............................................................. 13 SERVICE MODE ......................................................... 16 TROUBLESHOOTING GUIDE .................................... 17 WIRING DIAGRAM ...................................................... 23 EXPLODED VIEW........................................................ 24 SCHEMATIC DIAGRAM.. (26) SPECIFICATIONS E2360S&T 1. LCD CHARACTERISTICS Type: Flat Panel Active matrix-TFT LCD Active Display Area: 23.0 inches/58.4 cm Pixel Pitch: 0.265 mm x 0.265 mm Surface Treatment: Anti-Glare coating Resolution: Max: VESA 1920x1080@60Hz. Recommend: VESA 1920x1080@60Hz. Video Input: Signal Input: 15 pin D-Sub Connector; DVI-D Connector (Only for E2360T) Input Form: RGB Analog (0.7 Vp-p/75 ohm) Digital (Only for E2360T) Plug&Play: DDC2AB (Analog) DDC2B (Digital) (Only for E2360T) 2. POWER SUPPLY 2-1. Power: 12V== 3.0A 2-2. Power Consumption On Mode: 30W (Typ.) Sleep Mode: ≤ 1 W Off Mode: ≤ 0.5 W 3. Sync Input Horizontal Freq. 30 kHz to 83 kHz (Automatic) Vertical Freq. 56 Hz to 75 Hz (Automatic) Input Form Separate Sync. Digital (Only for E2360T) 4. ENVIRONMENT 4-1. Operating Temperature: 10°C to 35°C Humidity: 10 % to 80% non-Condensing 4-2. Storage Temperature: -20°C to 60 °C Humidity: 5 % to 90 % non-Condensing 5. DIMENSIONS (with Stand) Width 54.23 cm (21.35 inch) Height 41.20 cm (1 6.22 inch) Depth 1 7.20 cm (6.77 inch) DIMENSIONS (without Stand) Width 54.23 cm (21.35 inch) Height 40.83 cm (16.07 inch) Depth 3.10 cm (1.22 inch) 6. WEIGHT (excl. packing) Weight: 2.6 kg (5.73 lb)

利用拨码开关控制液晶显示器进行ASIC字符显示

中北大学 课程设计说明书 学生姓名:甘世伟学号：04 学院: 电子与计算机科学技术学院 专业: 微电子学 题目: 利用拨码开关控制液晶显示器进行ASIC字符显示 指导教师：王红亮职称: 讲师 2010 年 6 月 25 日 目录

表—1：OCMJ2X8（128X32）引脚说明....................- 12 -硬件接口 ..................................................................................................................................................................... - 13 -四、电性能参数 ......................................................................................................................................................... - 13 -1）表—1模块时间参数表.........................- 13 -2）表—2模块主要电气参数表.......................- 14 -用户命令 ..................................................................................................................................................................... - 14 -外型尺寸图（图11） .............................................................................................................................................. - 15 -6.附录：液晶显示器简介 (13) 1、课程设计目的 （1）学习操作数字电路设计实验开发系统，掌握液晶显示器的工作原理及应用。 （2）掌握组合逻辑电路、时序逻辑电路的设计方法。 （3）学习掌握可编程器件设计的全过程。 2、课程设计内容和要求： 、设计内容 用VHDL语言编写程序，利用拔码开头控制液晶显示器进行ASIC字符显示。 、设计要求 （1）学习掌握拔码开头控制模块、液晶显示模块的工作原理及应用； （2）熟练掌握VHDL编程语言，编写键盘控制模块的控制逻辑；

冠捷I2369V液晶显示器维修手册

维修手册客户/品牌机种名 AOC I2369V

变更说明 版本发布日期变更说明对外机种名对内机种名 A00 JAN,28,2013Initial Release I2369V TDCJN27YFVA2HNF.LF A01 FEB,06,201,2 Add new model I2369V/WW TDCJN27YFVA3HNF.LF

目录 1. 技术规格 -------------------------------------------------------------------------------------------------------------- 4 1.1 一般规格 --------------------------------------------------------------------------------------------------------- 4 1.2 工厂预设模式 --------------------------------------------------------------------------------------------------- 5 2. 操作说明 -------------------------------------------------------------------------------------------------------------- 6 2.1控制面板--------------------------------------------------------------------------------------------------------- 6 2.2接口说明--------------------------------------------------------------------------------------------------------- 7 2.3 OSD菜单调整 ------------------------------------------------------------------------------------------------- 8 3. 工厂模式调整 -------------------------------------------------------------------------------------------------------- 23 4. 电气方框图 ----------------------------------------------------------------------------------------------------------- 24 5. 线路图 ----------------------------------------------------------------------------------------------------------------- 25 5.1主板--------------------------------------------------------------------------------------------------------------- 25 5.2按键板------------------------------------------------------------------------------------------------------------ 30 5.3电源板------------------------------------------------------------------------------------------------------------ 31 6. ISP和DDC烧录SOP --------------------------------------------------------------------------------------------- 34 7. 故障处理流程 -------------------------------------------------------------------------------------------------------- 47 7.1主板--------------------------------------------------------------------------------------------------------------- 47 7.2按键板------------------------------------------------------------------------------------------------------------ 51 8.主要IC管脚及内部框图 -------------------------------------------------------------------------------------- 52 9. 附带软件使用SOP--------------------------------------------------------------------------------------------- 56 9.1分屏软件SOP -------------------------------------------------------------------------------------------------- 56 9.2 e-Saver SOP --------------------------------------------------------------------------------------------------- 57 9.3 i-Menu SOP ---------------------------------------------------------------------------------------------------- 58 10. 料件清单 ------------------------------------------------------------------------------------------------------------ 59

led显示屏控制卡-LED显示屏控制器原理

目录 第一章 801型、802型卡功能简介 (1) 第二章硬件参数 (5) 第二章第8代控制系统使用手册 (6) 第三章国标网线制作方法 (25) Index Chapter I Model 801 and 802 functions and features (27) Chapter II Model 801 and 802 manual (30) Chapter III Communication cable making method (49) 深圳三鑫维科技是一家专业生产制造LED显示屏的知名企业，20年的led行业研究经验，如还有不理解的请咨询电话：9

第一章 801型、802型卡功能简介 一、完全兼容第七代 基于第七代升级开发，原功能不少，新功能更多更强大，系统更稳定更可靠。可与七代系统混合使用。 二、支持10位颜色 旧系统的8位颜色只能显示256X256X256=1677216种颜色，新系统颜色数为1024X1024X1024=1073741824种颜色，新系统颜色数是旧系统的64倍。 三、智能连接功能 同一块显示屏的多块接收卡/箱体（含备用的）可以任意交换而不需重新设置，接收卡能智能地动识别需显示的内容。 四、智能监控 每块接收卡均有温度检测和四路风扇监控输出，可根据用户设定的温度上限智能地控制四路风扇转速。 五、公司图标显示 当发送卡电源没开启时显示屏自动显示设定的公司图片，图片像素为128X128，颜色数为16K色。 六、支持16以内的任意扫描方式 原系统只支持1、2、4、8、16扫描，新系统为1、2、3、4、5、6、 7、8、9、10、11、12、13、14、15、16扫描。 七、支持模块宽度为64以内的任意数

史上最全的LED显示屏故障维修手册

LED显示屏维修资料 判断问题必须先主后次方式的处理，将明显的、严重的先处理，小问题后处理。短路应为最高优先级。 1、电阻检测法，将万用表调到电阻档，检测一块正常的电路板的某点的到地电阻值，再检测另一块相同的电路板的同一个点测试与正常的电阻值是否有不同，若不同则就确定了问题的范围。 2、电压检测法，将万用表调到电压档，检测怀疑有问题的电路的某个点的到地电压，比较是否与正常值相似，否则确定了问题的范围。 3、短路检测法，将万用表调到短路检测挡(有的是二极管压降档或是电阻档，一般具有报警功能)，检测是否有短路的现象出现，发现短路后应优先解决，使之不烧坏其它器件。该法必须在电路断电的情况下操作，避免损坏表。 4、压降检测法，将万用表调到二极管压降检测档，因为所有的IC都是由基本的众多单元件组成，只是小型化了，所以在当它的某引脚上有电流通过时，就会在引脚上存在电压降。一般同一型号的IC相同引脚上的压降相似，根据引脚上的压降值比较好坏，必须电路断电的情况下操作。该方法有一定的局限性，比如被检测器件是高阻的，就检测不到了。单元板故障： A.整板不亮1、检查供电电源与信号线是否连接。 2、检查测试卡是否以识别接口，测试卡红灯闪动则没有识别，检查灯板是否与测试卡同电源地，或灯板接口有信号与地短路导致无法识别接口。(智能测试卡) 3、检测74HC245有无虚焊短路，245上对应的使能(EN)信号输入输出脚是否虚焊或短路到其它线路。 注：主要检查电源与使能(EN)信号。 B.在点斜扫描时，规律性的隔行不亮显示画面重叠 1、检查A、B、C、D信号输入口到245之间是否有断线或虚焊、短路。 2、检测245对应的A、B、C、D输出端与138之间是否断路或虚焊、短路。 3、检测A、B、C、D各信号之间是否短路或某信号与地短路。注：主信号。 C.全亮时有一行或几行不亮 1、检测138到4953之间的线路是否断路或虚焊、短路。

液晶电视电源板维修经验

液晶电视电源板维修经验 1、什么是PFC电路呢？PFC电路说白了就是把桥堆整流后的+300V电压升高到+375V----+400V。这也是液晶电视的电源与CRT电视的电源不同之处的第一点，不同之处的第二点就是次级电压比CRT的低，其它的地方与普通的开关电源原理相同，都一样。测得大滤波电容330U/450V两端电压为+375V---+400V，则表明功率因数校正电路工作正常；如果测得电容两端电压为+300V，说明PFC电路未工作，主查PFC振荡集成电路。! i$ M8 c& H. r3 L 2、检修液晶电源时，首先确认保险管状态，保险管完好，通常PFC校正电路中的开关管等没有失效。再测量大电解电容对地是否存在短路，有几十千欧以上充电电阻，表明电源没有击穿。如果保险管损坏，第一个要检查PFC校正电路开关管，第二个要检查副电源IC 。; U$ @/ 3、40英寸以下的一般输出+5V、+12V、+24V三组电压；40英寸以上的一般输出+5V、+12V、+18V、+24 V四组电压。其中+5 V为待机电压，+12V供数字板，+18V供伴音，+24 V供背光板。在实践维修中，只要各组电压一样、功率一样的电源板都可以代换。# I! S6 4、电源板可以从电视上摘下独立维修，维修时只需要把开关机控制电路三极管C、E短接（或将一只1.5K左右的电阻与副电源的+5V输出端相连），整机就处于开机状态，各路电压均有输出。在部分液晶彩电的开关电源中，只有+12V或+24V输出端带有一定功率的负载，主开关电源才进行正常的工作状态。所以在+24 V输出端上你可以接一只电动自行车的36 V 灯泡作假负载（或在+12V输出端接一只摩托车灯泡作假负载）即可。! ~) ^/ @+ g, T K% [' 5、液晶电源通电后，副电源先工作，输出+5V电压给数字板上的CPU，此时整机处于待机状态。当按“待机”键后，CPU输出开机电平，PFC 电路先工作，将+300V脉动直流电压转换成正常的直流电压（+380V）后，这时主开关电源的脉宽振荡器才开始工作，接着主开关变压器次级输出+12V、+24V电压，整机进入正常工作状态。/ r: R. 6、保护电路，在液晶彩电开关电源中，除具有常见的尖峰吸收保护电路外，还设在+24V、+12V和+5V电压的过压、过载保护电路，其保护电路多采用四运算放大器LM324、四电压比较器LM339、双电压比较器LM393或双运算放大器LM358。过流过压保护电路，在维修时可脱开不用，如果电压恢复正常，说明保护电路引起，这时要分步断开是哪路起作用。然后再进行维修。) M7 c6 w4 M: s( L' ?4 {; Y + X7 w 7、开机前，先确认有无炸件、电容鼓包现象，如有应先更换并把相关的器件全部都测量一遍。建议更换所有损坏器件后试机时，最好把原机保险丝除掉，接上一个220V/100W的灯泡，这样可以有效防止再次炸件。: z2 z8 8、主开关电压+24V或+12 V的输出电流较大，对整流二极管要求较高，一般采用低压差的大功率肖特基二极管，不能用普通的整流二极管替换。另外接负载后，电压反而上升，多属于电源滤波不好引起。" W# C 9、电源带负载能力差，首先要测一下PFC 电压是否正常（380 v），如果正常，问题就在电源厚膜上，通常是电源厚膜带载能力差引起，这一点请大家注意。. P' f0 10、电源板上，贴有**三角形标记的散热片以及散热片下面的电路，均为热地。严谨直接用手接触！注意任何检测设备，都不能直接跨接在热地和冷地之间。

LED显示屏控制系统方案

LED显示屏控制系统的分析与设计 摘要 本文根据LED图文显示屏系统的具体要求，通过查阅资料，分析并归纳出具体设计方案。即系统体系结构、系统整体工作流程、软件控制系统的设计以及串行通信设计。这个系统的工作流程是:通过软件控制系统提供的编辑工具完成图文编辑工作，对编辑的信息实现字模提取，然后可以根据系统提供的显示模式加载显示效果，确认为欲显示信息后保存文件，然后通过程序调用Windows函数，并采用RS-232C串口通信，实现数据到无线发射机的传输。 本文具体设计了三个模块:编辑功能模块，字模提取模块，效果添加及预览模块。系统是否需要更新以及现有设计是否能够满足要求都有待于进一步的研究。 关键词:LED 字模串行通信

目录 1 绪论 1.1 LED显示屏的研究背景及意义 (5) 1.2 软件开发工具C++概述 (6) 2 LED显示屏控制系统的系统分析 2.1 整体分析 (8) 2.2 计算机软件模块分析与设计 (8) 3 串行接口 3.1 串行通信的工作原理 (10) 3.2 RS-232C串行通信简介 (10) 3.3 RS-232C引脚及使用 (11) 3.4 MAX-232介绍 (12) 4 软件控制系统设计与实现 4.1编辑功能设计与实现 (14) 4.2字模提取 (16) 4.3效果添加与预览功能的设计与实现 (18) 4.4控制系统软件设计 (20) 5 总结 26 参考文献 (27)

致 (28) 1 绪论 1.1 LED显示屏的研究背景及意义 在当今现代信息化社会的高速发展过程中，大屏幕显示已经从公共信息展示等商业应用向消费类多媒体应用渗透。随着宽带网络的发展，数字化的多媒体容将在信息世界中占据主流，新型的大屏幕显示设备将代替传统电视机成为人们享受信息和多媒体容的中心。 与传统的显示设备相比，这种未来的巨大需求让大屏幕显示技术成为众人目光的焦点： (1) LED显示屏色彩丰富，显示方式变化多样(图形、文字、三维、二维动画、电视画 面等)、亮度高、寿命长，是信息传播设施划时代的产品。 (2) LED显示屏是集光电子技术、微电子技术、计算机技术、信息处理技术于一体的 高技术产品，可用来显示文字、计算机屏幕同步的图形。它以其超大画面、超强视觉、灵活多变的显示方式等独居一格的优势，是目前国际上使用广泛的显示系统。 (3) LED显示屏应用广泛，金融证券、银行利率、商业广告、文化娱乐等方面，有巨 大的社会效益和丰厚的经济效益。 在其历史的演变过程中，出现了多种信息传播媒体：但就其性能看：如阴级管(crt)或石英管(dv)大型电视，成本非常昂贵，在不需要超大画面且在室使用时效果尚可；彩色液晶显示同样成本昂贵、电路复杂，面积有限，受视频角的影响非常大，可视角度很小；影象投影设备亮度小、清晰度差(画面受光不均匀)；电视墙表面有分割线，视觉上有异物感，室外应用时亮度效果差。而LED显示屏以其受空间限制较小，并可以根据用户要求设计屏的大小，具有全彩色效果，视角大，可以用于显示文字、图案、图象、动画、视频、录象信号等各种信息的特点得到了突飞猛进的发展。 LED显示屏的发展主要经历了三个阶段： 1、1990年以前LED显示屏的成长时期。一方面，受LED材料器件的限制，LED显示屏的应用领域没有广泛开展;另一方面，显示屏控制技术基本上是通讯控制方式，客观上影响了显示效果。这一时期的LED显示屏在国外应用较广，国很少，产品以红、绿双基色为主，控制方式为通讯控制，灰度等级为单点4级调灰，成本较高。 2、1990-1995年，这一段是LED显示屏迅速发展的时期。进入九十年代，全球信息产业高速增长，信息技术各个领域不断突破，LED显示屏在LED材料和控制技术方面也不断出现新的成果。蓝色LED晶片研制成功，全彩色LED显示屏进入市场;电子计算机及微电子领域的技术发展，在显示屏控制技术领域出现了视频控制技术，显示屏灰度等级实现16