A flicker adjustment method and device based on fast jeita algorithm
An adjustment method and algorithm technology, applied in the direction of instruments, nonlinear optics, optics, etc., can solve the problems of slow measurement speed and inability to reflect subjective feelings, and achieve the effects of good consistency, stable measurement, and meeting the requirements of card control
Active Publication Date: 2020-11-03
WUHAN JINGLI ELECTRONICS TECH
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The FMA method uses the AC component ratio of the brightness change to represent Flicker, which is characterized by fast and simple measurement, but it cannot reflect the subjective feeling of the human eye on the flicker of different frequencies; while the JEITA method and VESA method use FFT frequency division to measure the flicker. The decibel value of the frequency, and then integrate the full spectrum according to the frequency response characteristics of the human eye or find the maximum decibel value, which is more in line with the human eye's perception of different flicker frequencies, and the measurement results are more objective and stable, but the measurement speed is relatively slow
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[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.
[0034] Such as figure 1 Shown, the present invention is based on the FLICKER regulation method of fast JEITA algorithm, comprises the following steps:
[0035] Step 1, switch the LCD module to the Flicker screen, and place the measurement probe on the LCD module;
[0036] Step 2, set the initial Vcom value of the liquid crystal module, and obtain the first flicker value of the liquid crystal module through the fast JEITA algorithm; the initial setting is based on experience, and the empirical value is not a unique value;
[0037] Step 3, adjust the Vcom value of the liquid crystal module according to the first direction (increase or decrease), and obtain the second flicker value of the liquid crystal module through the fast JEITA...
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The invention discloses a Flicker adjusting method and device based on a rapid JEITA algorithm. An adjusting process comprises the following steps: setting initial Vcom value of a liquid crystal module and obtaining first Flicker value of the liquid crystal module through the rapid JEITA algorithm; adjusting Vcom value of the liquid crystal module and obtaining second Flicker value of the liquid crystal module through the rapid JEITA algorithm; adjusting Vcom value of the liquid crystal module along the second direction if the second Flicker value is greater than the first Flicker value in order to obtain third Flicker value of the liquid crystal module; adjusting Vcom value of the liquid crystal module along the first direction if the second Flicker value is smaller than the first Flickervalue in order to obtain third Flicker value of the liquid crystal module; and taking Vcom value corresponding to the third Flicker value as Vcom configuration value. Through combination of the rapidJEITA algorithm and a standard JEITA algorithm, Flicker values are obtained and much more reflect true feelings of eyes of people. Advantages such as high speed, great precision, stable measurement and good uniformity are obtained. The requirement for clamp control of a high-quality liquid crystal screen is met.
Description
technical field [0001] The invention belongs to the technical field of liquid crystal panel detection, and in particular relates to a Flicker adjustment method and device based on a fast JEITA algorithm. Background technique [0002] During the use of the liquid crystal panel, due to the polarity switching of the common electrode signal Vcom, the flicker phenomenon of horizontal stripes will be generated, which is generally called the flicker phenomenon. Among them, the magnitude of the Flicker flicker value also directly reflects the quality and reliability of the LCD panel. Generally, the smaller the flicker value, the smaller the risk of Image Sticking (IS) on the liquid crystal panel, and vice versa. Therefore, how to measure the magnitude of the flicker value and control the flicker value within a predetermined range is a problem to be faced in the design and manufacture of the liquid crystal panel. [0003] In the prior art, the Flicker flicker value is usually measu...
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IPC IPC(8): G02F1/13
CPCG02F1/1309
Inventor 张付强秦明梁红军赵正
Owner WUHAN JINGLI ELECTRONICS TECH