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Brightness and chromaticity correction method and device for led display device

A technology of a display device and a correction method, which is applied to static indicators, instruments, etc., can solve problems such as not taking into account the dimension of brightness components, and achieve good display effects

Active Publication Date: 2019-02-26
XIAN NOVASTAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the above-mentioned prior art only finds the light point closest to the target value on the color coordinates, which is processed in two dimensions, and does not take into account the dimension of the brightness component

Method used

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  • Brightness and chromaticity correction method and device for led display device
  • Brightness and chromaticity correction method and device for led display device
  • Brightness and chromaticity correction method and device for led display device

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Embodiment Construction

[0026] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] As an example, the overall calibration process for RGB full-color LED display devices such as RGB full-color LED display screens in the following embodiments of the present invention can be divided into three steps: collecting data, setting target values, and generating and uploading calibration coefficients.

[0028] 1. Data collection

[0029] Use an image acquisition device to collect the raw data of the primary colors (red, green, blue) of the LED display screen to obtain multiple sets of original brightness and chromaticity values, where each set of original brightness and chromaticity values ​​can be a set of bright colors corresponding to a single LED light point It can also be multiple LED lamp points corresponding to a ...

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Abstract

The invention provides a luminance correcting method for an LED display device and a corresponding luminance correcting device. The luminance correcting method comprises the following steps: (i) acquiring a plurality of groups of original luminance values of the LED display device; (ii) by utilizing an objective function relevant to a luminance correction coefficient, the original luminance and the target luminance and taking the value range of the luminance correction coefficient as the constraint condition, acquiring the luminance correcting coefficient corresponding to the minimal objective function value when each group of original luminance value and the set target luminance value are substituted into the objective function; and (iii) uploading and storing the acquired luminance correction coefficient in control system hardware of the LED display device. According to the method and the device, by utilizing the constraint condition, the color component correction coefficient corresponding to the minimal objective function is calculated, then the nearest-neighbor point which can be achieved is found in the three-dimensional space, thus the color which can be realized is approximate to the target luminance value as far as possible, and the display effect is good.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method for correcting brightness and chromaticity of an LED display device and a device for correcting brightness and chromaticity of an LED display device. Background technique [0002] Since the 21st century, the display industry has developed unprecedentedly, and LED display screens have spread all over the central squares and commercial buildings of all cities. LED display screens are well received by people for their unique advantages of bright colors, high visibility, and low power consumption. The difference in brightness (for example, the brightness of the same production batch of LEDs may vary by nearly 50%, and the chromaticity may vary by 15-20nm), and the brightness and chromaticity of the display screens spliced ​​​​of multiple different production batches of LEDs are even more serious. These brightness and chromaticity differences are intolerable for human visio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32G09G3/20
CPCG09G3/2003G09G3/32
Inventor 王雨杨城赵星梅
Owner XIAN NOVASTAR TECH