Visual angle measurement method for display panel
A technology of display panel and measurement method, which is applied in testing optical properties, instruments, optics, etc., can solve problems such as low measurement efficiency and time-consuming, and achieve the effects of improving measurement efficiency, reducing measurement times, and optimizing measurement logic
Pending Publication Date: 2021-06-22
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology
Generally speaking, the viewing angle of chromaticity of VA (Vertical Alignment, vertical alignment type) liquid crystal display panel can reach more than 90°, and the viewing angle of chromaticity of IPS (In-Plane Switching, in-plane switching type) liquid crystal display panel can reach 150° Above, then when measuring, the number of rotations of the colorimeter will be correspondingly higher than the angle value of the viewing angle of the chromaticity. The degree meter needs to rotate 120 times and measure, which is extremely time-consuming, resulting in low measurement efficiency
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[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.
[0030] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation shown in the drawings Or positional relationship is only for the convenience of describing the present invention and simpl...
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The invention discloses a visual angle measurement method for a display panel, and the method comprises the steps: taking 0 degree as a measurement angle, measuring a chromatic value of the display panel when a preset image is displayed, and enabling the chromatic value to be a front-view chromatic value; adding a degree to the measurement angle, measuring a chromatic value of the display panel when the display panel displays a preset picture as a first side-view chromatic value, calculating a chromatic deviation value as a first chromatic deviation value according to the first side-view chromatic value and the front-view chromatic value, and repeating the step until the first chromatic deviation value is greater than a critical value; reducing the measurement angle by b degrees, measuring a chromatic value of the display panel when the display panel displays the preset picture as a second side view chromatic value, calculating a chromatic deviation value as a second chromatic deviation value according to the second side view chromatic value and the front view chromatic value, and repeating the step until the second chromatic deviation value is smaller than a critical value; in the obtained chromaticity deviation values, taking one chromaticity deviation value closest to the critical value, and taking the corresponding test view angle as the view angle of the display panel; wherein a>b>=1.
Description
technical field [0001] The present application relates to the field of display technology, in particular to a method for measuring a viewing angle of a display panel. Background technique [0002] With the wide application of display devices in daily life, people have higher and higher demands on the performance of display devices. Among them, the viewing angle of chromaticity is an important evaluation parameter of the display effect of a display device, especially for a display device such as a television that requires a large viewing angle. [0003] In order to make the viewing angle of the display panel meet the predetermined requirements, it is necessary to measure and determine the viewing angle of the display panel before shipment. Generally speaking, the viewing angle of chromaticity of VA (Vertical Alignment, vertical alignment type) liquid crystal display panel can reach more than 90°, and the viewing angle of chromaticity of IPS (In-Plane Switching, in-plane swit...
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IPC IPC(8): G01M11/02G02F1/13
CPCG01M11/02G02F1/1309
Inventor 张云
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD