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LCD overdrive auto-calibration apparatus and method

An automatic calibration and over-excitation technology, applied in cathode ray tube indicators, static indicators, instruments, etc., can solve the problems of display artifacts, slow response to input commands, time-consuming manual calibration, etc.

Inactive Publication Date: 2005-07-20
GENESIS MICROCHIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with LCD pixels is that they are sluggish in responding to input commands, where the pixels reach their target value after several frames have passed, and the resulting display artifacts - "ghost" images of fast-moving objects - are objectionable
Because calibration requires more than 80 independent measurements, manual calibration is time-consuming and has potential for human error

Method used

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  • LCD overdrive auto-calibration apparatus and method
  • LCD overdrive auto-calibration apparatus and method
  • LCD overdrive auto-calibration apparatus and method

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Embodiment Construction

[0016] Reference will now be made in detail to specific embodiments of the invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the invention to the described embodiments. On the contrary, it is intended to cover alternatives, modifications and equivalents as included within the spirit and scope of the invention as defined by the appended claims.

[0017] It should be noted that although the invention has been described with reference to a particular embodiment having a pixel bit size (or depth) of 8 bits (representative of 256 levels), the invention is also applicable to pixels having other bit depths (such as 10-bit pixel) of the pixel embodiment.

[0018] One of the keys to the overdrive approach lies in the precise characterization of the optical response of the LCD panel. An accurate model allows overdrive to more a...

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Abstract

A method of auto-calibration of a liquid crystal display (LCD) is described. The method is carried out by generating and displaying on the LCD a test patch at a first grey level, generating a first signal based upon the test pattern at the first grey level, generating and displaying a second test patch at a second grey level, generating a second signal based upon the test pattern at the second grey level, and calculating an entry to an LCD overdrive table based upon the first and the second signal.

Description

technical field [0001] The invention relates to a display device. More particularly, the present invention describes a method and apparatus for enhancing the performance of motion in an LCD panel display. Background technique [0002] Each pixel of the LCD panel can be assigned to exhibit luminance values ​​discretized into the standard set [0, 1, 2, . G and B make up an arbitrary color that is updated every frame (typically, 1 / 60 second) time. The problem with LCD pixels is that they are sluggish in responding to input commands, where the pixels reach their target value after several frames have passed, and the resulting display artifacts - "ghost" images of fast-moving objects - are objectionable . Ghosting occurs when the LCD's response rate is not fast enough to keep up with the frame rate. In this case, the transition from one pixel value to another cannot be completed within the required time frame because the LCD depends on the ability of the liquid crystal to ori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G09G3/00G09G3/20G09G3/36G09G5/06
CPCG09G2340/16G09G2320/0252G09G2320/029G09G2320/0257G09G3/006G09G3/2011G09G2320/0285G09G2320/0693G09G5/06G09G2320/0666G09G3/3648G09G2360/122G09G3/36
Inventor S·塞尔比A·麦金农
Owner GENESIS MICROCHIP