Planar LC12 Manual De Usuario

Title:  Product Specification: LC12 High-Bright Monitor 

Page 4 of 24 

Document Number: 023-0284-01 

 

          Revision:  A 

This document defines the electromechanical parameters and operating characteristics for a 12’1” Active 

Matrix Liquid Crystal Display (AMLCD) based product, hereafter referred to as the Monitor. It is intended 
for operation in high ambient light, outdoor environment.  The Monitor has a scaleable video format 

capable of displaying a minimum of VGA (640 x 480) through XGA (1024 x 768) input resolution. 

The Monitor can be driven directly from the standard analog Video Graphics Array (VGA) output on a 
personal computer (PC).  It consists of a 12.1" viewable diagonal LCD Panel with optical elements, Cold-

Cathode Fluorescent Backlight, Backlight Inverter Board, and LCD Controller Board.  Cooling fans provide 

temperature stabilization within the Monitor’s operating environment. Two (2) chassis mounted 
connectors at the rear provide for video signal and DC power input connections.  These components will 

be mounted in a fully enclosed chassis. 

1.1       Display Format 

The Monitor is compatible with IBM VGA

1

 and VESA

2

 video standards.  Its operating frequency 

range is 31.5 KHz?56.5 KHz horizontal; 60 Hz?72 Hz (non-interlaced) vertical.  Specific video 

resolutions supported are as follows: 

For IBM VGA

1

 modes, the Monitor will accept 640 pixels horizontally; 400 or 480 lines vertically 

and 800 pixels or 1024 pixels horizontally, 600 lines or 768 lines vertically for the VESA

2

 modes.  

Figure 9 defines the video signal timing requirements. 

The LCD Controller Board will automatically program itself, sensing incoming horizontal/vertical 

frequencies and sync pulse polarities to completely “fill” the active display area of the Monitor 
with the video resolution being presented.   Section 4.4.1 (Video Mode Definitions) defines 

parameters for video resolution detection by the LCD Controller Board. 

Note:  IBM VGA

1

 modes with border and the 720 x 400 video resolution are excluded from 

completely filling the active display area horizontally.  Only the first 640 pixels will be displayed. 

                                                                 

1

 IBM VGA is a registered trademark of International Business Machines Corporation 

2

 VESA is a registered trademark of Video Electronics Standards Association. 

 Video Resolution 

Number of Bits/Color 

Number of Colors 

640 x 400 

6 

262,144 

640 x 480 

6 

262,144 

720 x 400 

6 

262,144 

800 x 600 

6 

262,144 

1024 x 768 

6 

262,144