Toshiba e-STUDIO350 - Description of Operation; Dot Matrix LCD Circuit

November 2003 © TOSHIBA TEC 5 - 9 e-STUDIO350/450 CONTROL PANEL
5
5.4 Description of Operation
5.4.1 Dot matrix LCD circuit
(1) Structure
The DSP-LCD-350 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 Cathod 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