A method for obtaining reference brightness, a point-by-point correction system and a correction method

A point-by-point correction and brightness correction technology, applied to instruments, static indicators, etc., can solve the problems of large selection experience and loss of screen brightness, and achieve the effects of avoiding brightness loss, accurate and reliable selection, and high calibration accuracy

Active Publication Date: 2014-10-01
盐城市盐南高新区都市产业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will often cause a great loss of screen brightness; there are also solutions that use other brightness as a reference value for adjustment under non-maximum brightness conditions, but the selection of brightness has a large empirical component, so it forms a stable and reasonable selection benchmark Brightness method is necessary

Method used

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  • A method for obtaining reference brightness, a point-by-point correction system and a correction method
  • A method for obtaining reference brightness, a point-by-point correction system and a correction method
  • A method for obtaining reference brightness, a point-by-point correction system and a correction method

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Embodiment 1

[0040] refer to figure 1 , figure 2 , the present embodiment provides a method for obtaining a reference brightness, the method includes the following steps, A1: use the preset brightness to light up the screen to be tested; A2: collect the current image data of the screen to be tested; A3: determine whether the image data Oversaturated, if oversaturated, perform step A4; if not oversaturated, divide the current brightness of the screen by the coefficient X to be the reference brightness, the coefficient X is greater than or equal to 2 and less than or equal to 5; A4: reduce the brightness of the screen; A5: repeat steps A2, A3.

[0041] For example, the judging whether the image data is oversaturated may include the following steps: A31, within the imaging range of each light point of the screen to be tested, the number of pixels with one of the grayscale values ​​of R, G, and B greater than 250 is equal to The ratio of the total number of pixels within the imaging range o...

Embodiment 2

[0045] This embodiment provides a point-by-point correction system, which uses the above-mentioned reference brightness to perform point-by-point brightness correction on the LED screen, such as figure 2 As shown, the system includes a main control device 13, a data acquisition device 11, a data processing device 12, a screen control device 14, a screen to be tested 15 and a data download device 16;

[0046] The main control device 13 is connected with the screen control device 14, and is used to issue a brightness command to the screen control device 14, and the screen 15 to be tested is lighted by the screen control device 14;

[0047] The main control device 13 is also connected with the data processing device 12, the data downloading device 16 and the data acquisition device 11, and the data acquisition device 11 is used to collect the information of the screen to be tested 15 under the control of the main control device 13. The image data and brightness data are sent to ...

Embodiment 3

[0058] On the basis of Embodiment 2, in order to improve the data processing capability and processing speed of the data processing device, the present embodiment further sets a brightness data processing module and an image data judging module in the data processing device 12 to process brightness data and image data respectively, Such as image 3 As shown, the data processing device 12 includes a brightness data processing module 121 and an image data judging module 122, wherein the brightness data processing module 121 is connected to the data acquisition device 11 one way for receiving brightness data, and one way is connected to the data downloading device 16, It is used to output point-by-point correction data to the data downloading device 16; the image data judging module 122 is connected to the data acquisition device 11 one way, is used to receive image data, and judges whether the image data is oversaturated, and one way is connected to the main control device 13 , ...

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Abstract

The invention discloses a benchmark brightness obtaining method which comprises the following steps: A1. using preset brightness to brighten a screen to be measured; A2. acquiring the current image data of the screen to be measured; A3. judging whether the image data is supersaturated or not, if supersaturated, executing step A4, if not, obtaining the benchmark brightness by dividing coefficient Xby the current brightness of the screen, wherein the coefficient X is more than or equal to 2 and less than or equal to 5; A4. reducing the screen brightness; and then, repeating steps A2 and A3. Theinvention also discloses point-to-point correction system and method; benchmark brightness data is adopted for point correction, thereby avoiding the unnecessary brightness loss and improving the correction precision.

Description

technical field [0001] The present invention relates to the field of LED display calibration, in particular to a method for obtaining a reference brightness and a system and method for point-by-point correction using the reference brightness. Background technique [0002] The LED display screen is composed of several unit modules, and the module is composed of several LED lamp points. Due to the uneven distribution of the light point angle, the brightness difference of the light point itself, the temperature attenuation difference of the light point, and the difference in the installation angle, height, position of the module and many other factors will cause the brightness of the LED light to be uneven, which will eventually lead to uneven display on the LED screen. Uniform, poor visual effect. [0003] In order to make the screen display uniform and the effect is good, it is necessary to adjust the brightness of the screen from uneven to uniform. In the calibration proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/00G09G3/32
Inventor 伍更新邵寅亮李伟
Owner 盐城市盐南高新区都市产业发展有限公司
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