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1.6
STN Color LCD
The STN Color Liquid Crystal Display (LCD) contains an LCD module, a Fluorescent Lamp
(FL), and an FL inverter board.
1.6.1
STN Color LCD Module
The T4700CS STN color LCD is backlit and supports 640x480 pixels with a Video control-
ler. This video controller includes the functions of Video Graphics Array (VGA).
The T4700CS's LCD receives vertical and horizontal synchronizing signals, 16-bit data signal
(8-bit upper block data signal, 8-bit lower block data signal), display enable signal, and shift
clock for data transmission. All signals are CMOS-level compatible.
The STN LCD is shown in figure 1-7. The specifications for the LCD are described in table
1-3.
NOTE: If ghost images remain on the screen after power is turned off, leave the
power off for a day and let the computer sit at room temperature. If the problem is
still not corrected, leave the computer at room temperature for two days or longer.
1-12
Figure 1-7 STN color LCD
Table 1-3 STN color LCD specifications
Item
Number of Dots
(dots)
Dot pitch
(mm)
Display area
(mm)
Contrast
FL current
(mA)
FL frequency
(KHz)
Specifications
640x480
0.3(W)x0.3(H)
195 (W)x147 (H)
18:1 (Typically)
6.0
47
T4700CS, T4700CT, T4800CT
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