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LM220W1
Liquid Crystal Display
Product General Specification
1. General Descriptions
The LM220W1 LCD is a Color Active Matrix Liquid Crystal Display with an integral Cold Cathode Fluorescent Lamp (CCFL) back
light system. The matrix employs a-Si Thin Film Transistor as the active element. It is a transmissive type display operating in
the normally black mode. This TFT-LCD has a 22.0 inch diagonally measured active display area with wide-SXGA
resolution(1024 vertical by 1600 horizontal pixel array). Each pixel is divided into Red, Green and Blue sub-pixels or dots which
are arranged in vertical stripes. Gray scale or the luminance of the sub-pixel color is determined with a 8 gray scale signal for
-bit
each dot, thus, presenting a palette of more than 16,777,216 colors.
The LM220W1 has been designed to apply the TMDSTM(Transition Minimized differential Signaling) as the
interface method to enables a simple and low-cost implementation in both the host and monitor.
The LM220W1 LCD is intended to support applications where high brightness, wide viewing angle, high color gamut, and high
color depth are very important. In combination with the vertical arrangement of the sub-pixels, the LM220W1 characteristics
provide an excellent flat panel display for office automation products such as monitors.
Host System TFT LCD Module
Host System TFT LCD Module
CTRL
Source Driver Circuit(Up)
Source Driver Circuit(Up)
RGB (48bit) SU1 SU7
TX0+/TX0-/SHIELD0
TX1+/TX1-/SHIELD1 RGB (48bit) CTRL
PanelLink Timing
TX2+/TX2-/SHIELD2 G1
SiI151 Controller
MDR 20PIN
Gate Driver circuit
TXC+/TXC-/SHIELDC CLK,DTMG
Gate Driver circuit
Connector Hsync,Vsync
HPD TFT-LCD Panel
TFT-LCD Panel
+5V
(1600 X 1024 pixels)
(1600 X 1024 pixels)
DDC V sync H sync
Power G4
Block
V DD(15V) /
PWR_CTRL RGB (48bit) SD1 SD7
Source Driver Circuit(Down)
Source Driver Circuit(Down)
CTRL
15PIN Connector
15PIN Connector
DDC DPMS 1. GND 11. NC
2. PWR Ctrl 12. +5V(DDC)
Microcontroller 3. GND 13. SDA
EDID PWR 4. PWR (15V) 14. SCL
5. PWR (15V) 15. GND
6. GND
7. Hsync
8. Vsync
MNT Logic 9. GND
MNT Logic
10. NC
General Display Characteristics
Followings are general features of the model LM220W1 LCD;
Active display area 22.0 inches(56cm) diagonal
Outsize dimensions 542.0w * 375.0h * 35.3t(typ)mm(Without Inverter)
Pixel pitch 0.294 mm 0.294 mm
Pixel format 1600 horiz. By 1024 vert. pixels
RGB vertical stripe arrangement
Color depth 8-bit, 16,777,216 colors
Display operating mode transmissive mode, normally black
Surface treatments hard coating(3H),
anti-glare treatment of the front polarizer
Interface method TMDS TM interface using SiI151 chips and DFP connector
Lamps Four CCFL(Cold Cathode Fluorescent Lamp)
Ver 1.2 MAY 15, 2000 Page 1/7
LM220W1
Liquid Crystal Display
Product General Specification
2. Electrical Specifications
2-1. Electrical Characteristics
The LM220W1 requires two power inputs. One input is employed to power the LCD electronics and to
drive the voltages to drive the TFT array and liquid crystal. And the second input which powers the CCFL, is
typically generated by an inverter. The inverter is an external unit to the LCD.
Table 1 Electrical Characteristics:
Values
Parameter Symbol Units Notes
Min. Typ. Max.
MODULE:
Power Supply Input Voltage V DD 14.25 15.0 16.5 V DC
Power Supply Input Current - 0.8 1.0 A 1
IDD
Control Logic Input High 2.6 - - V DC
Control Logic Input Low V IH - - 0.8 V DC
V IL
Control Logic Output High V OH 2.5 - -
Control Logic Output Low V OL - - 0.5
LAMP (each CCFL) 2
Operating voltage 1070 860 830 V RMS 3
Operating Current V BL 3.0 8.0 9.0 mA
IBL 4
Established Starting Voltage 3
at 25 1400 - - V RMS
at 0 2100 - - V RMS
Operating Frequency F BL 40 50 60 KHz 5
Discharge Stabilization time Ts - - 3 minutes 6
Life time 15000 20000 - hours 7
Notes: 1. The input current shall be measured at VDD of 15.0Vdc at 25 , refresh rate of 60Hz, and pixel clock
frequency of 112.2MHz under full white pattern(255gray).
2. The inverter should have symmetrical output voltage and current waveform because the performance
of lamp is extremely influenced by the characteristics of it.
3. The values shall be measured at both end of lamp and are for reference for inverter design.
4. The value shall be measured at the ground cable and does not include loss of external inverter.
5. The lamp frequency shall be designed carefully to evade interference with Hsync frequency.
6. Ts is the time required for the brightness of the center of the lamp to be 95%. Assume the
brightness is 100% after operating 5minutes.
7. The life time is defined as the time at which brightness of lamp is 50% compare to that of initial
value at the typical lamp current on condition of continuous operating at 25