One World Touch OP 1200, Service Manual, Page: 119 / 135

Service Manual version 1008
OP 1200/1500/1700 (PC920 Intel 945G)
8-111
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A: LCD Specification
A-1: OP 1200 LCD
The standard display used for the OP 1200 is a LG.Phillips 12.1” TFT LCD, LB121S03 or its equivalents.
It is a color active matrix liquid crystal display with an integral cold cathode fluorescent lamp (CCFL)
backlight system. The matrix employs a-Si Thin Film Transistor as the active element. It is a
transmissive type display operating in the normally white mode. Each pixel is divided into Red, Green
and Blue sub-pixels or dots which are arranged in vertical stripes. Gray scale or the brightness of the
sub-pixel color is determined with a 6-bit gray scale signal for each dot, thus, presenting a palette of
more than 262,144 colors.
A-1-1. Specification
Item Specification
Active Screen Size 12.1 inches (30.75cm) diagonal
Outline Dimension 276(H) × 209(V) × 11(D) mm
Pixel Pitch 0.3075 mm × 0.3075 mm
Pixel Format 800 horiz. By 600 vert. Pixels RGB strip arrangement
Color Depth 6-bit, 262,144 colors
Luminance, White 400 cd/m2 (Typ.)
Power Consumption 6.8 Watt(Typ.)
Weight 655g (Max.)
Display Operating Mode Transmissive mode, normally white
Surface Treatment
Anti-glare treatment
A-1-2. Absolute Maximum Ratings of Environment
The following are maximum values which, if exceeded, may cause faulty operation or damage to the unit
Parameter Symbol
Values
Units Notes
Min Max
Power Input Voltage VCC -0.3 +4.0 Vdc at 25  2 ° C
Operating Temperature TOP 0 70 ° C 1
Storage Temperature TST -30 80 °
C
1
Operating Ambient Humidity HOP 10 90 %RH 1
Storage Humidity HST 10 90 %RH 1
A-1-3. Electrical Characteristics
The LB121S03 requires two power inputs. One is employed to power the LCD electronics and to drive the
TFT array and liquid crystal. The second input which powers the CCFL, is typically generated by an
inverter. The inverter is an external unit to the LCD.
Parameter Symbol
Value
Unit Notes
Min Typ Max
MODULE
Power Supply Input Voltage VCC 3.0 3.3 3.6 Vdc
Power Supply Input Current L
C
- 190 270 mA 1
Power Consumption P
C
- 0.6 0.9 Watt 1
LAMP
Operating Voltage V
BL
470(8mA) 515(6mA) 470(3mA)
V
RMS
Operating Current l
BL
mA
RMS
Established Starting Voltage V
S
@25
o
C 800 V
RMS
@0
o
C 1,000 V
RMS
Operating Frequency f
BL
40 60 80 KHz
Discharge Stabilization T
S
3 Min