Toshiba portege 610ct 620ct Instruction De Maintenance
610CT
1-11
1.6
TFT Color LCD
The TFT Color Liquid Crystal Display (LCD) contains an LCD module, a Fluorescent Lamp
(FL), and an FL inverter board.
(FL), and an FL inverter board.
1.6.1
LCD Module
The 610CT TFT color LCD supports 640x480 pixels with an internal display controller and
256K colors for graphics and characters. This controller includes the functions of Video
Graphics Array (VGA) and Super VGA (SVGA) for external display.
256K colors for graphics and characters. This controller includes the functions of Video
Graphics Array (VGA) and Super VGA (SVGA) for external display.
The LCD receives 9-bit data signals, data enable signals, and has a shift clock for data trans-
mission. All signals are CMOS-level compatible.
mission. All signals are CMOS-level compatible.
The TFT LCD is shown in figure 1-7.
Figure 1-7 TFT color LCD
The specifications for the LCD are listed in table 1-3.
Table 1-3 TFT color LCD specifications
Item
Specifications
Number of dots
(dots)
640 x 480
Dot pitch
(mm)
0.3 x 0.3
Display area
(mm)
192 x 144
Contrast
100
FL current
(mA)
4.0
FL frequency
(KHz)
100 (max)