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Display device, uneven brightness correction method, correction data making device and correction data making method

A technology of uneven brightness and display devices, applied in static indicators, instruments, etc., can solve the problems of difficult to store non-volatile memory, large capacity of correction data, etc.

Inactive Publication Date: 2013-10-23
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the volume of correction data for correcting local brightness unevenness on the liquid crystal panel is large, it is generally difficult to store it in a small-capacity nonvolatile memory.

Method used

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  • Display device, uneven brightness correction method, correction data making device and correction data making method
  • Display device, uneven brightness correction method, correction data making device and correction data making method
  • Display device, uneven brightness correction method, correction data making device and correction data making method

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Embodiment approach 1

[0080] One embodiment of the present invention will be described. In this embodiment, a transmission-type liquid crystal display device equipped in a mobile device such as a mobile phone, that is, a display device that performs display based on image data representing each color of RGB in 6 bits, will be described in which the correction direction is parallel to the source line (data line). ) is an example of stripe unevenness in the extending direction. However, the applicable objects of the present invention are not limited thereto.

[0081] figure 2 It is a block diagram showing the configuration of the correction data creation device 10 and the display device 20 according to the present embodiment. As shown in the figure, the correction data creation device 10 includes a display data generation unit 11 , an imaging unit 12 , a brightness data extraction unit 13 , a moving average processing unit 14 , a brightness unevenness detection unit 15 and a correction data genera...

Embodiment approach 2

[0213] Other embodiments of the present invention will be described. For convenience of description, members having the same functions as those described in Embodiment 1 are given the same symbols as those in Embodiment 1, and descriptions thereof are omitted.

[0214] In Embodiment 1, the configuration for correcting streak-like unevenness was described. In this embodiment, a configuration example for correcting local spot-like unevenness (spot-like unevenness) will be described.

[0215] Figure 16 It is a block diagram showing the configuration of the correction data creation device 10b and the display device 20b according to this embodiment. As shown in the figure, the correction data creation device 10b includes a moving average processing unit 14b, a brightness unevenness detection unit 15b, and a correction data generation unit 16b instead of the moving average processing unit 14, Brightness unevenness detection unit 15 and correction data generation unit 16 . In add...

Embodiment approach 3

[0267] Still another embodiment of the present invention will be described. For convenience of description, components having the same functions as those described in Embodiments 1 and 2 are assigned the same reference numerals, and descriptions thereof are omitted.

[0268] In the first embodiment, the configuration for correcting the stripe-shaped unevenness in brightness was explained, and in the second embodiment, the configuration for correcting the configuration for correcting the spot-like unevenness in brightness was described. However, in this embodiment, the correction for both the stripe-like uneven brightness and the spot-like uneven brightness will be described. Time composition example.

[0269] Figure 23 It is a block diagram showing the configuration of the correction data creation device 10c and the display device 20c according to this embodiment. As shown in the figure, the correction data creation device 10c includes a moving average processing unit 14b, ...

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Abstract

In a correction data storage part, correction data are storaged; the correction data comprises a deviation value of uneven brightness and grouping information; the deviation value of uneven brightness is a difference between a brightness value of each pixel or a brightness value of each pixel group when an image corresponding to image data for examination is displayed in a display picture and a rational brightness value of each pixel or each pixel group corresponding to the image data for examination; the grouping information is information for grouping correction regions corresponding to each region with uneven brightness based on the degree of the uneven brightness in each region with uneven brightness. In addition, when an image corresponding to image data for display is displayed in the display picture, a spacial dispersion processing part determines pixels for changing gray values contained in the correction region based on the grouping result for each correction region contained in the correction data.

Description

technical field [0001] The present invention relates to a technique for correcting brightness unevenness on a display screen of a display device. Background technique [0002] In image display devices such as liquid crystal display devices, plasma displays, and organic EL (electro-luminescence) displays, due to various reasons in the manufacturing process, the display brightness on the screen is locally darker or brighter than the desired brightness. Uneven brightness. [0003] Brightness unevenness is classified into several types according to its shape, but the representative ones are stripe unevenness that produces striped brightness unevenness on the display screen, and spot-like unevenness that locally produces spotty uneven brightness . [0004] For example, in the manufacturing process of small high-definition liquid crystal panels, after depositing amorphous silicon on a glass substrate, laser irradiation is performed to crystallize amorphous silicon with low mobil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20G09G3/36G09G3/00
Inventor 吉冈史善片冈耕太郎矢追善史足立浩一郎太田佳似岩田浩
Owner SHARP KK
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