Flash point intensity measurement apparatus and flash point intensity measurement method

A technology of measuring device and detection method, applied in the direction of measuring device, optical testing flaw/defect, instrument, etc., can solve problems such as inability to make accurate judgment, strong scattering of incident light, influence of display effect, etc., and achieve high repeatability, Effects that remove effects and are easy to operate

Inactive Publication Date: 2019-01-01
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These defects or inhomogeneities cause the incident light to be strongly scattered, so under the visual perception, there will be a layer of flickering small bright spots on the surface of the sample to be tested, and these small bright spots have a serious impact on the display effect
In most cases, people mainly judge the strength of the flash point with the naked eye, and the result of such judgment is highly subjective, and due to the limitation of the resolution of the human eye, sometimes it is impossible to make an accurate judgment

Method used

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  • Flash point intensity measurement apparatus and flash point intensity measurement method
  • Flash point intensity measurement apparatus and flash point intensity measurement method
  • Flash point intensity measurement apparatus and flash point intensity measurement method

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Embodiment 1

[0044] combine figure 2 As shown, in this embodiment, five samples of anti-glare glass containing different degrees of flash point are selected, the pure green display screen 1 is turned on, and the five samples are sequentially fixed at the sample 3 with the fixing fixture 2, and the CCD camera is used to 4. Five different flash point images are captured and sent to the image processing system 5 for processing.

[0045] combine image 3 As shown, the fluctuation range of the gray value of different samples is different. The stronger the flash point, the greater the fluctuation range of the gray value. We judge its fluctuation by calculating the standard deviation of its gray value, and use this standard deviation as its sparkle Sp. The specific calculation formula is: Sp=Stdv(G[200,200]) The calculation results are shown in Table 1.

[0046] Table 1

[0047] Sample serial number

1

2

3

4

5

Sp

13.1218

11.6451

10.7125

8.8...

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Abstract

The invention provides a flash point intensity measurement apparatus and a flash point intensity measurement method. The flash point intensity measurement apparatus comprises a pure color display screen, a fixing fixture, a to-be-measured sample, a CCD camera and an image processing system, wherein the to-be-measured sample is fixed at the center position of the pure color display screen by the fixing fixture, the camera of the CCD camera faces the center of the pure color display screen, the CCD camera is connected to the image processing system and is used for taking the flash point image ofthe to-be-measured sample on a pure color background, and the image processing system is used for calculating the flash point intensity of the flash point image. According to the present invention, the intensity of the flash point is characterized by the flashing degree so as to achieve the accurate measurement of the flashing degree by using the simple, intuitive and effective method.

Description

technical field [0001] The invention relates to the technical field of photoelectric display, in particular to a device and method for measuring the strength of a flash point. Background technique [0002] Thin films play a very important role in display devices, and are divided into many types, such as anti-reflection (AR) films, anti-glare (AG) films, and the like. With the continuous improvement of people's pursuit of quality of life, better display effect is what people expect, and thin film is a part that cannot be ignored. However, with the continuous application of thin films and the limitation of people's visual perception, the problem of flash point has gradually attracted everyone's attention. Flash points arise from tiny defects or inhomogeneities in etched glass or films, either in or on the surface. These defects or inhomogeneities cause the incident light to be strongly scattered, so there will be a layer of flickering small bright spots on the surface of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88
CPCG01N21/8851G01N2021/8887
Inventor 顾文华徐健黄晗程雄蒋锦虎朱晓波
Owner NANJING UNIV OF SCI & TECH
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