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

5.4 Description of Operation

5.4.1 Dot matrix LCD circuit

(1) Structure
(40 x 240)
The LCD panel is an STN blue mode transmissive type LCD with 640x240-dot display capacity. It con-
sists of a driver LSI, frame, printed circuit board, and lateral type CCFL backlight.
* STN: Super Twisted Nematic
* CCFL: C old Cathode Fluorescent Lamp
(2) Block diagram
XSCL
UD0
UD
UD2
UD3
WF
LP
LCDEN
VDD
Power
GND
supply
V0
VEE
© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
Fig. 5-401
IC
0
IC5 20
IC 20
Fig. 5-402
5 - 9
05/11
IC2 IC3 IC4
0 0 0
LCD PANEL
40 x 240 DOTS
e-STUDIO350/352/353/450/452/453
5
CONTROL PANEL