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LED brightness correction method

A correction method and technology of brightness and chromaticity, applied in the direction of instruments, static indicators, etc., can solve problems such as low efficiency, achieve the effect of improving adjustment efficiency, shortening time-consuming, and ensuring color vividness

Active Publication Date: 2016-06-08
XIAN NOVASTAR TECH
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  • Summary
  • 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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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 invention relates to an LED brightness correction method. The method comprises the following steps carried out successively: performing reduction adjustment on the brightness of at least one area to be corrected in multiple areas to be corrected; in response to input operation carried out by a user based on a human eye visual adjustment mode, performing brightness adjustment on the multiple areas to be corrected so as to enable the multiple areas to be corrected to tend to be consistent in terms of human eye vision, and calculating multiple eye-vision-based adjustment coefficients corresponding to the multiple areas to be corrected; and performing brightness expansion adjustment on the multiple areas to be corrected by use of an original brightness value of one specific area to be corrected among the multiple areas to be corrected. According to the invention, the adjustment speed can be greatly accelerated through initial multi-area rapid matching, at the same time, error influences brought by measurement equipment can also be avoided through brightness reduction, the final adjustment effect of the multiple areas can be guaranteed through brightness expansion, and the brightness adjustment can be more convenient and rapid.

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 Applications(China)
IPC IPC(8): G09G3/32
Inventor 杨城赵星梅
Owner XIAN NOVASTAR TECH
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