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LED brightness and chromaticity correction method

A correction method and technology of brightness and chromaticity, which can be applied to instruments, static indicators, etc., can solve problems such as low efficiency, and achieve the effects of improving adjustment efficiency, shortening time consumption, and avoiding the influence of errors.

Active Publication Date: 2018-01-12
XIAN NOVASTAR TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The advantage of using human visual judgment is that the measurement accuracy of the human visual system is higher than that of the existing measurement equipment and point-by-point correction system, that is to say, the human eye will still notice a slight difference in the multi-batch LED display after point-by-point correction. However, the efficiency of this adjustment method based on the human eye is relatively low, and it is difficult to meet today's rapidly developing industrial needs.

Method used

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  • LED brightness and chromaticity correction method

Examples

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no. 1 example

[0027] For multi-batch LED displays with regional distribution of brightness and chromaticity, the difference in brightness and chromaticity between batches can be eliminated through the adjustment method based on the reduction and expansion of brightness and chromaticity. The specific implementation method can be as follows:

[0028] (E11) Acquiring the public brightness and chromaticity of each batch area of ​​the LED display screen. specifically:

[0029] First, set the sample area of ​​each batch of multi-batch LED display screens and use measuring equipment such as a colorimeter to collect the original brightness and chromaticity of each batch of sample areas. For example, for the same batch of LEDs distributed in multiple areas, Any one of these areas can be designated as the sample area. More specifically, for the differences in brightness and chromaticity between batches of LED display screens presented by multiple batches, set the sample area for each batch, and usua...

no. 2 example

[0055] For multi-batch LED displays with regional distribution of brightness and chromaticity, the difference in brightness and chromaticity between batches can be eliminated through the adjustment method based on the reduction and expansion of brightness and chromaticity. The specific implementation method can be as follows:

[0056] (E21) Acquiring the public brightness and chromaticity of each batch area of ​​the LED display screen. specifically:

[0057] First of all, for the case of no measuring equipment such as a colorimeter, first set the sample area of ​​each batch of multi-batch LED display screens.

[0058] Secondly, any batch (usually the first batch or batch 1) is selected as the target batch. Since the measured value of the original brightness and chromaticity of the target batch is unknown, to ensure the effectiveness of subsequent adjustments, it can be reduced by a certain ratio by default. The brightness and chromaticity of the target batch reach the range t...

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Abstract

The present invention relates to a method for correcting brightness and chromaticity of an LED, for example, comprising the following steps in sequence: reducing and adjusting the brightness and chromaticity of at least one region to be corrected among a plurality of regions to be corrected; The input operation is performed to adjust the brightness and chromaticity of the multiple areas to be corrected so that the multiple areas to be corrected tend to be consistent with human vision, and calculate a number of values ​​corresponding to the multiple areas to be corrected based on human eyes. a visual adjustment coefficient; and performing brightness and chromaticity expansion adjustment on the plurality of areas to be corrected by using the plurality of adjustment coefficients based on human eye vision and an original brightness and chromaticity value of a specified area to be corrected in the plurality of areas to be corrected. The present invention can greatly speed up the adjustment speed through the initial multi-region fast matching, and at the same time, reducing the brightness and chromaticity can avoid the error effect caused by the measuring equipment, and expanding the brightness and chromaticity can ensure the final adjustment effect of multiple regions, making the brightness and chromaticity adjustment more convenient and fast.

Description

technical field [0001] The invention relates to the technical field of LED display correction, in particular to a method for correcting LED brightness and chromaticity. Background technique [0002] LED display screens are bright in color, high in visibility and low in power consumption. Brightness and chromaticity are more or less inconsistent with human vision. The root cause of this problem of inconsistent brightness and chromaticity lies in the LED itself. In order to cope with the fact that the production line cannot strictly control the consistent production of LEDs, manufacturers have adopted the method of grading brightness and chromaticity (industrial classification released by LED manufacturers) The file standard is 25% to 40% brightness change, 5nm chromaticity change), fully mix each grade of LED, and the manufacturer will use the same batch and the same grade of LEDs to assemble the same LED display. However, this kind of binning process is expensive and time-...

Claims

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Application Information

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