Control method for increasing brightness consistency, brightness correction controller

A technology of brightness correction and control method, which is applied in the direction of instruments, static indicators, cathode ray tube indicators, etc., and can solve the problems of large storage space, long correction time, considerable time cost, etc.

Inactive Publication Date: 2013-11-06
NOVATEK MICROELECTRONICS CORP
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Problems solved by technology

Generally speaking, since the total number of pixels in the screen is quite astonishing, if pixel-to-pixel brightness correction is to be performed, the calibration time required to complete a display device will be quite long, usually from several hours to tens of hours. Wait, the time cost is very considerable
At the same time, after the brightness correction is completed, the display device must store the brightness correction value δE corresponding to all gray levels of all pixels, so the required storage space is relatively large, and an external dynamic random access memory (dynamic RAM) is required. , the cost is also higher

Method used

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  • Control method for increasing brightness consistency, brightness correction controller
  • Control method for increasing brightness consistency, brightness correction controller
  • Control method for increasing brightness consistency, brightness correction controller

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Embodiment Construction

[0024] In order to reduce the correction time of the display device, the inventor of the present invention discloses a brightness correction method in Taiwan Patent Application No. 098125483, which uses a conversion function to perform coordinate conversion, and converts the original pixel brightness and gray scale The exponential relationship, after coordinate conversion, is transformed into a linear relationship in the new coordinates. In this way, the linear interpolation method can be used to deduce the relationship between brightness and gray level in each sampling pixel that has not been actually measured, and become a linear correction function exclusive to each sampling pixel. Then, by comparing the linear correction function of the sampled pixel with the linear correction function of the reference pixel, the relationship between each grayscale value of each sampled pixel and the adjusted new grayscale value can be judged, that is, the brightness correction value δE, an...

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Abstract

The invention relates to a control method for increasing brightness consistency, a brightness correction controller and a display device. The control method is used for increasing the brightness consistency of the display device, one panel of the display device comprises a plurality of sampling pixels, and each sampling pixel corresponds to a sampling coordinate value of the panel. The control method comprises the following steps of: receiving an input pixel; judging an adjacent sampling pixel of the input pixel according to one coordinate value of the input pixel and the sampling coordinate values of the plurality of sampling pixels; obtaining a brightness searching table of the adjacent sampling pixel, wherein each brightness searching table comprises a brightness correction value of one adjacent sampling pixel; respectively obtaining a specific brightness correction value corresponding to a gray value in the brightness searching table according to a corresponding gray value of the input pixel; and calculating a brightness correction value of the input pixel according to the coordinate value of the input pixel, the sampling coordinate value of the adjacent sampling pixel and the specific brightness correction value.

Description

technical field [0001] The present invention relates to a control method for improving brightness consistency, a related brightness correction controller and a display device, and in particular to a control method and related brightness correction control for all pixels to obtain brightness correction using a limited brightness lookup table devices and display devices. Background technique [0002] With the continuous development of video technology, consumers have continuously improved quality requirements for display devices. Generally speaking, there are several aspects to measure the quality of a display device. For example, the display device must be stable and reliable with clear picture quality. Among them, in order to improve the definition of the picture quality, the display device must have high resolution and good color quality, and in addition, the uniformity of the brightness of the picture (or the uniformity of the brightness) must be as perfect as possible. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G5/10H04N5/57
Inventor 陈星全
Owner NOVATEK MICROELECTRONICS CORP
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