B-1 Introduction - Advantech PWS-1419 User Manual

Appendix B: LCD VIDEO Controller

B-1 Introduction

The LCD video controller subassembly is an "in-monitor" design build around a high
performance ASIC technology that enable the display of analog VGA signals on a flat
panel LCD display. The LCD video board provides all the electronic necessary to drive
a TFT flat panel display from VGA (640x480) up to (1280x1024) source.
In feature a multi-interface LCD video controller board that support TTL, LVDS and
TMDS protocol-base flat panel display. The controller includes auto resolution adjust-
ment and versatile On-Screen-Display Controller adjustment.
There are three basic functional within the LCD video Controller:
The video receiver circuit
The LCD driver circuit, and
The inverter
How the LCD Video Controller connects to the LCD screen
LCD Screen
A computer's video interface produces an analog video signal. Since LCD monitors
require a digital signal, a video receiver circuit is require to convert the analog video
signal into a digital video format that is accepted by the LCD monitor's driver circuit.
Once the analog signal has been converted to a digital format, the digital signal is
passed to the LCD driver circuit.
This converts the digital video signal into the row and column information that actually
that pixels on and off on the display.
PWS-1409/1419 User's Manual
Inverter
LCD Video
Controller
49
OSD Interface Board
12V Power
Source
Analog VGA input
source from VGA card