Toshiba e-STUDIO200L/230/280 SERIES - Description of Operation; Dot Matrix LCD Circuit

e-STUDIO200L/202L/203L/230/232/233/280/282/283 © 2004 - 2008 TOSHIBA TEC CORPORATION All rights reserved
CONTROL PANEL
5 - 12
5.4 Description of Operation
5.4.1 Dot matrix LCD circuit
1) Structure
Fig. 5-4
The LCD panel is an STN blue mode transmissive type LCD with 640x240-dot display capacity. It
consists of a driver LSI, frame, printed circuit board, and lateral type CCFL backlight.
* STN: Super Twisted Nematic
* CCFL: Cold Cathode Fluorescent Lamp
2) Block diagram
Fig. 5-5
(
640 x 240
)
XSCL
UD0
UD1
UD2
UD3
WF
LP
VDD
GND
V0
VEE
LCDEN
LCD PANEL
640 x 240 DOTS
160 160 160 160
120
120
IC1
IC2 IC3 IC4
IC5
IC6
Power
supply