Toshiba T4700CS Maintenance Manual page 14

1.7 TFT Color LCD
The TFT Color Liquid Crystal Display (LCD) contains an LCD module, a Fluorescent Lamp
(FL), and an FL inverter board.
1.7.1 TFT Color LCD Module
The T4700CT/T4800CT TFT color LCD supports 640x480 pixels with an internal display
controller and 512 colors for graphics and characters. This controller includes the functions
of Video Graphics Array (VGA) and Super VGA (SVGA) for external display.
The T4700CT/T4800CT's LCD receives 9-bit data signals, data enable signals, and shift clock
for data transmission. All signals are CMOS-level compatible.
The TFT LCD and FL invertor board are shown in figure 1-8. The specifications for the LCD
are described in table 1-5.
Number of dots
Dot pitch
Display area
Contrast
FL current
FL frequency
1-14
Figure 1-8 TFT color LCD
Table 1-5 TFT color LCD specifications
Item
(dots)
(mm)
(mm)
(mA)
(KHz)
Specifications
640x480
0.3 (W)x0.3 (H)
192 (W)x144 (H)
60:1 (minimum)
6.0
47
T4700CS, T4700CT, T4800CT