Display contrast calibration method and device under high luminance environment

A calibration method and technology for calibrating devices, which are applied to static indicators, cathode ray tube indicators, instruments, etc., can solve the problems of lack of calibration traceability for measurement results, increased device costs, and inability to achieve direct solar illuminance levels, etc. To achieve excellent repeatability and stability, to achieve the effect of calibration

Active Publication Date: 2015-01-21
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Description
  • Claims
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Problems solved by technology

[0004] The existing display bright room contrast measurement device and method are as follows: 1. When the size of the measured display is large, the diameter of the integrating sphere required for the measurement also needs to be increased, and the cost of the device will be doubled; 2. The size of the device The measurement results do not have a calibration and traceability method, and the accuracy and reliability of the value cannot be guaranteed; 3. Using the light source in a single integrating sphere as an environmental lighting device cannot achieve the output of the illuminance level of direct sunlight at high altitude; 4. The measured display and measuring instruments The position is fixed, resulting in a single geometric condition of the incident light source, and the observation angle of the measuring instrument is fixed

Method used

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  • Display contrast calibration method and device under high luminance environment
  • Display contrast calibration method and device under high luminance environment
  • Display contrast calibration method and device under high luminance environment

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Embodiment 1

[0034] The present invention provides a display contrast calibration method in a high-brightness environment, comprising the following steps:

[0035] Step 1: Fix a set of standard reflectors on the measuring table, use corresponding light sources to irradiate the center positions of different reflectors according to the calibration requirements, measure the brightness of the center positions of different reflectors with a luminance meter, and compare the brightness of different reflectors. The brightness measurement results between the reflectors are calculated to obtain the brightness contrast between the reflectors;

[0036]Step 2: Use the calibrated reflectance value of the standard reflector to calculate the standard reflectance contrast between different reflectors, and use this to calibrate the brightness contrast measured by the luminance meter to obtain contrast calibration under different measurement ranges factor;

[0037] Step 3: Fix the display under test on the ...

Embodiment 2

[0047] On the basis of the above-mentioned embodiments, the present invention also provides a display contrast calibration device in a high-brightness environment by applying the above-mentioned method, such as figure 1 As shown, it includes a measuring table 101 for placing a display, a positioning laser marking line, a standard reflector 103, a diffuse ambient light source 106, a specular light source 104, a diffuse integrating sphere light source 107, a direct light source 105, a luminance meter and a luminance meter platform 108; The measuring platform 101 on which the display is placed is used to ensure that the display center of the flat panel display 102 of various sizes to be measured is located at the center of the measuring platform 101 on which the display is placed; the positioning laser marking line is used to prompt the measured display 102, The placement of the standard reflector 103 and ensuring that the position of the display surface remains unchanged during t...

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Abstract

The invention provides a display contrast calibration method and device under the high luminance environment. The high luminance environment is simulated through a collineation light source, a mirror plane light source, a diffusion environment light source and a diffusion integrating sphere light source. With the cooperation of mechanical displacement mechanisms of a display measurement table, a luminance meter platform and the like, the contrast of a display can be calibrated and measured under multiple complex illumination conditions with high luminance. By the adoption of the scheme, a standard reflecting plate is additionally arranged on a display fixing platform, a measurement result of the calibration device is calibrated by utilizing the calibrated and verified standard reflecting plate, value traceability is conducted on a contrast parameter of the display through the device, and it is ensured that the measurement result has excellent repeatability and stability.

Description

technical field [0001] The invention belongs to the technical field of display contrast calibration, and in particular relates to a display contrast calibration method and device in a high-brightness environment. Background technique [0002] The contrast parameter is an important indicator of the display. Manufacturers often use darkroom contrast when testing and publicizing this parameter, that is, the result of measurement in an optical darkroom. The ratio of the luminance value of the black point is used as the contrast ratio. However, the display does not work in a dark room. With the continuous development of display technology, various types of displays are widely used in portable mobile devices, vehicle or airborne electronic equipment, and outdoor advertising screens. Strong ambient background radiant light hits the screen surface. Due to the limited brightness dynamic range of the display device, it is impossible to truly restore the brightness information of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02G09G5/10
Inventor 王国权孙权社朱兴邦赵发财王少水郑祥亮韩忠
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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