Browse Prior Art Database

Gray Level Re-Mapping by Sensing Input RGB Data on Liquid Crystal Display

IP.com Disclosure Number: IPCOM000117337D
Original Publication Date: 1996-Feb-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 4 page(s) / 114K

Publishing Venue

IBM

Related People

Itoh, H: AUTHOR

Abstract

Disclosed is a method for Gray level re-mapping by sensing Input RGB data on Liquid Crystal Display (LCD).

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 56% of the total text.

Gray Level Re-Mapping by Sensing Input RGB Data on Liquid Crystal
Display

      Disclosed is a method for Gray level re-mapping by sensing
Input RGB data on Liquid Crystal Display (LCD).

      When a software application is using area of High Gray level
(Brighter color), this method re-map LCD Reference voltage which
brings Gray level on LCD into expanded area of High gray level mode,
by sensing Input RGB data (ex: RGB 6bits each) by each fixed cycle
time.

      Also, when the software application is using area of Low Gray
level (Darker color), this method re-map LCD Reference voltage which
brings Gray level on LCD into expanded area of Low gray level mode,
by sensing Input RGB data (ex: RGB 6bits each) by each fixed cycle
time.

      Then, this Gray level re-mapping makes User to easy to watch
various Gray level of the software applications.

      Fig. 1 shows a Gray Level of Input RGB data Decoder / LCD
Reference Voltage re-mapper.  The table shows a relationship between
Input RGB data and Gray Level.  In detail, at Block(a) which
functions as Decode and Latch circuit of Gray Level Input RGB (0:5)
data, Input RGB data (0:5) are decoded into Gray Level area (1)
L63-L55 or (2) L54-L45 or (3) L44-L20 or (4) L19-L11 or (5) L10-L0
and latched during 1 frame (1 VSYNC cycle time).

      Then output of Block (a) which is (1) L63-L55, or (2) L54-L45,
or (3) L44-L20, or (4) L19-L11 or (5) L10-L0 is input into Block(b),
which functions as re-mapping ci...