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Apparatus and method for generating gamma voltage

A gamma voltage and generator technology, applied in cathode ray tube indicators, instruments, static indicators, etc., can solve problems such as affecting the brightness of EL display devices

Inactive Publication Date: 2007-06-20
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the gamma voltage group generated by the gamma voltage generator 26 affects the brightness of the EL display device

Method used

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  • Apparatus and method for generating gamma voltage
  • Apparatus and method for generating gamma voltage
  • Apparatus and method for generating gamma voltage

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Embodiment Construction

[0031] Preferred embodiments of the present invention will be described in detail below with reference to examples in the accompanying drawings.

[0032] FIG. 4 shows a gamma voltage generating device according to a first exemplary embodiment of the present invention. The gamma voltage generating device shown in FIG. 4 includes a plurality of gamma group generators (such as the gamma group generators 30, 32, 34 and 36 shown in the example of FIG. 4) that generate mutually different gamma voltage groups; and The gamma group selector 38 selects any one gamma voltage group from the gamma voltage groups from the gamma group generators 30 , 32 , 34 and 36 to apply the selected gamma voltage group to the data driver 40 .

[0033] The first to fourth gamma group generators 30 , 32 , 34 and 36 generate mutually different first to fourth gamma voltage groups according to mutually different external brightness patterns, respectively. In this case, the first to fourth gamma voltage grou...

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Abstract

An apparatus for generating gamma voltage includes a plurality of gamma set generators and a gamma set selector. The gamma set generators generate a plurality of gamma voltage sets that include gamma voltages having different voltage levels from each other such that each gamma voltage set corresponds with a brightness mode. The gamma set selector selects any one of the gamma voltage sets in response to the brightness mode and drives data lines of a display device in accordance with the selected gamma voltage set.

Description

technical field [0001] The present invention relates to a device for generating gamma voltage in a display device, in particular to a device and method for generating a gamma voltage group in a display device. Background technique [0002] Recently, various flat panel display panel technologies having reduced weight and volume compared to cathode ray tube (CRT) technology have become popular. These flat panel display panel technologies include liquid crystal displays, field emission displays, plasma display panels, and electroluminescence (hereinafter, EL) display devices. Among them, EL display devices are self-luminous devices that make fluorescent substances emit light through the recombination of electrons and holes, and can generally be divided into inorganic ELs that use inorganic compounds as fluorescent substances and organic ELs that use organic compounds. EL display devices have many advantages such as low-voltage driving, self-luminescence, thin-film type, wide v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G5/00G09G5/12G09G3/30G09G3/32G09G5/10
CPCG09G3/3275G09G2320/0626G09G2310/0297G09G2320/0606G09G3/3225G09G2320/0276G09G2360/144G09G3/3208G09G3/30
Inventor 河龙玟郑锡熙郑训周李大润李汉相
Owner LG DISPLAY CO LTD