Browse Prior Art Database

BIOS Color Tuning Up for Liquid Crystal Display

IP.com Disclosure Number: IPCOM000105708D
Original Publication Date: 1993-Sep-01
Included in the Prior Art Database: 2005-Mar-20
Document File: 2 page(s) / 21K

Publishing Venue

IBM

Related People

Kato, N: AUTHOR [+2]

Abstract

A program is disclosed that dynamically optimizes the values in a color look-up table (CLUT) of a personal computer system, which determines the mapping between color code numbers and actual colors, depending on the type of display device being used. The CLUT values are normally tuned for a conventional cathode ray tube (CRT) display device, which causes some liquid crystal display (LCD) devices to show wavering or streaming images.

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BIOS Color Tuning Up for Liquid Crystal Display

      A program is disclosed that dynamically optimizes the values in
a color look-up table (CLUT) of a personal computer system, which
determines the mapping between color code numbers and actual colors,
depending on the type of display device being used.  The CLUT values
are normally tuned for a conventional cathode ray tube (CRT) display
device, which causes some liquid crystal display (LCD) devices to
show wavering or streaming images.

The program operates as follows:

1.  Determine the type of the display device(s) being used (a CRT, an
    LCD, or both a CRT and an LCD).

2.  If at least one LCD is in use, replace the CLUT values with the
    ones best suited to the LCD.  Otherwise, replace the CLUT values
    with the ones best suited to CRT.