Toshiba e-STUDIO453 - Description Of Operation; Dot Matrix Lcd Circuit

e-STUDIO350/352/353/450/452/453
CONTROL PANEL
5
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5.4 Description of Operation
5.4.1 Dot matrix LCD circuit
(1) Structure
The LCD panel is an STN blue mode transmissive type LCD with 640x240-dot display capacity. It con
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sists 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
(640 x 240)
IC1
XSCL
UD0
UD1
UD2
UD3
WF
LP
VDD
GND
V0
VEE
Power
supply
LCDEN
IC2
LCD PANEL
640 x 240 DOTS
IC3 IC4
160 160 160 160
IC5
120
IC6
120
Fig. 5-401
Fig. 5-402
05/11