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Generating method of gama value test card of display device and measuring method of gama value

A technology of display devices and measurement methods, applied in static indicators, instruments, electrical components, etc., can solve the problems of complex Gamma value method and low test efficiency, and achieve the effect of accurate test results

Inactive Publication Date: 2013-03-13
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An embodiment of the present invention provides a method for generating a gamma value test card of a display device and a method for measuring a gamma value of a display device, which are used to solve the problem of complex methods for testing the gamma value of a display device and low test efficiency in the prior art. question

Method used

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  • Generating method of gama value test card of display device and measuring method of gama value
  • Generating method of gama value test card of display device and measuring method of gama value
  • Generating method of gama value test card of display device and measuring method of gama value

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Embodiment 1

[0031] Embodiment 1 of the present invention provides a method for generating a gamma value test card of a display device, the method comprising:

[0032] A standard picture area composed of N pixel units is generated on the display panel by a signal generator to obtain a Gamma value test card; wherein, the pixel unit includes M pixel subunits, and the M pixel subunits include K grayscales A pixel subunit of 0, and M-K pixel subunits with a grayscale of 255, where M and N are positive integers greater than 1, and K is a positive integer not less than 1 but not greater than M, constituting a standard screen area The number M of the pixel sub-units contained in each pixel unit is the same, partly the same or all different, and the number K of pixel sub-units with a grayscale of 0 contained in each pixel sub-unit is all the same, partly the same or all No, the number M of pixel sub-units contained in at least one pixel unit in the standard picture area is different from the numbe...

Embodiment 2

[0044] Such as image 3 As shown, it is a schematic diagram of a method for measuring the Gamma value of a display device provided by Embodiment 2 of the present invention, and the method includes the following steps:

[0045] Step 101: Generate a display device Gamma value test card using the method for generating a display device Gamma value test card described in Embodiment 1, and determine the grayscale corresponding to the generated display device Gamma value test card, and determine the grayscale The brightness of the standard picture area represented by the Gamma value test card of the display device under the order.

[0046] Specifically, special optical instruments can be used to test the brightness of the standard picture area, and the brightness of the standard picture area can also be observed with naked eyes.

[0047] Preferably, the gray scale corresponding to the display device Gamma value test card generated by the determination is specifically:

[0048] Acco...

Embodiment 3

[0070] Such as Image 6 As shown, a method for measuring the Gamma value using the generated display device Gamma Gamma value test card provided by Embodiment 3 of the present invention includes the following steps:

[0071] Step 201: Determine the gray scale L of the tested picture area according to the gray scale voltage of the tested picture area in the display panel, and determine the brightness of the tested picture area displayed by the display panel under the action of the gray scale voltage;

[0072] Step 202: Utilize the method in Embodiment 1 to generate a display device Gamma value test card whose corresponding gray scale L is the same as the gray scale of the tested picture area, and determine the standard represented by the generated display device Gamma value test card the brightness of the picture area;

[0073] Preferably, in this step 202, the number M of pixel subunits contained in each pixel unit constituting the standard picture area is the same, and the n...

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Abstract

The invention discloses a generating method of a gama value test card of a display device and a measuring method of gama value. The methods mainly include determining the gray scale that the generated Gamma test card of the display device corresponds to and brightness of a standard picture area shown as the Gamma test card of the display device, determining gray scale voltage of the picture area to be tested according to the gray scale that the standard picture area in a display panel corresponds to, determining brightness of the picture area to be tested and displayed by the display panel under the effect of the gray scale voltage, comparing the brightness of the standard picture area and the picture area to be tested and determining the Gamma value of the display device under the gray scale. The measuring method is suitable for acquiring test results by utilizing a special test device in machine-reading mode and suitable for obtaining the test results by observing test results through naked eyes, and has the advantages of being convenient and quick to use, accurate in test result and the like.

Description

technical field [0001] The invention relates to the technical field of display testing, in particular to a method for generating a display device gamma value test card and a method for measuring the display device gamma value. Background technique [0002] The Gamma value is an important parameter of the display, which is used to characterize the non-linear relationship between the image brightness output by the display and the input signal voltage. For a display, since the brightness of its output image changes exponentially with the input signal voltage, the dark area of ​​the displayed image is darker than the actual situation, and the bright area of ​​the image is brighter than the actual situation, which is also That is, the display compresses the dark areas of the actual image and expands the bright areas of the actual image. [0003] Similarly, the sensitivity of the human eye to light of different brightness is also nonlinear, but the sensitivity of the human eye is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/00
CPCH04N17/00G09G3/2074G09G2320/0673H04N9/69H04N17/02H04N17/04G09G3/006
Inventor 吴行吉汪建明孙志华许益祯张亮
Owner BOE TECH GRP CO LTD
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