Toshiba T4500 User Manual page 16

1.7 TFT Color LCD Display (T4500C & T4600C)
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 (T4500C & T4600C)
The T4500C and T4600C TFT color LCD is backlit and supports 640 x 480 pixels with a High
Resolution Graphics Subsystem (HRGS) and 512 colors for graphics and characters. This HRGS
includes the functions of Video Graphics Array (VGA).
The T4500C's LCD receives vertical and horizontal synchronizing signals, 9-bit data signals, data
enable signals, and shift clock for data transmission. The T4600C'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 is shown in Figure 1-10. The specifications for the LCD are described in Table 1-5.
Number of Dots (dots)
Dot pitch
Display area
Contrast
FL current
FL frequency
1-16
Figure 1-10 TFT Color LCD
Table 1-5 TFT Color LCD Specifications
Item
(mm)
(mm)
(mA)
(KHz)
T4500C
640 x 480
0.267 (W) x 0.27 (H)
171 (W) x 130 (H)
60:1 (minimum)
5.0
47
T4600C
640 x 480
0.3 (W) x 0.3 (H)
192 (W) x 144 (H)
60:1 (minimum)
5.0
47