Method, device and system for detecting defects of liquid crystal screen

A technology of defect detection and LCD screen, which is applied in the field of detection to achieve the effect of improving accuracy, increasing contrast, and overcoming missed defects

Inactive Publication Date: 2017-02-22
BEIJING LUSTER LIGHTTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method, device and system for liquid crystal screen defect detection, which can solve the problem of improving detection accuracy without increasing the complexity of the structure

Method used

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  • Method, device and system for detecting defects of liquid crystal screen
  • Method, device and system for detecting defects of liquid crystal screen
  • Method, device and system for detecting defects of liquid crystal screen

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Experimental program
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Embodiment 1

[0036] Embodiment 1 of the present invention provides a liquid crystal screen defect detection system, such as figure 1 As shown, the system includes: a central controller 11, a camera 12, a screen control board 13, a liquid crystal screen 14, a light source control board 15, and a full-color backlight 16;

[0037] In the liquid crystal screen defect detection system, in addition to the components included in the above system, it also includes auxiliary components such as brackets, conveyor belts, and power supply devices. Auxiliary components are indispensable and commonly used in liquid crystal screen detection, and in the embodiment of the present invention, the auxiliary components are not the key to solving the problem of missing detection during the detection process, so the detailed description of the auxiliary components will not be given here.

[0038] The central controller 11 is configured to send screen control signals.

[0039] The central controller 11 is the ma...

Embodiment 2

[0061] Embodiment 2 of the present invention provides a liquid crystal screen defect detection method, which is applied to a liquid crystal screen defect detection system. The system includes a central controller, a camera, a screen control board, a liquid crystal screen, a light source control board, and a full-color backlight, such as figure 2 As shown, the method includes:

[0062] 201. Acquire a screen control signal.

[0063] The screen control signal refers to the signal that controls the display on the LCD screen. Obtain the screen control signal sent by the control center, so as to determine the change of the LCD screen according to the screen control signal.

[0064] 202. Determine an optimal illumination color of the full-color backlight according to the screen control signal.

[0065] When detecting defects on the LCD screen, it was found that when the white backlight evenly irradiates the LCD screen, the LCD screen lights up with a monochrome background image, a...

Embodiment 3

[0073] Embodiment 3 of the present invention provides another liquid crystal screen defect detection method, which is applied to a liquid crystal screen defect detection system. The system includes a central controller, a camera, a screen control board, a liquid crystal screen, a light source control board, and a full-color backlight. like image 3 As shown, the method includes:

[0074] 301. Generate the screen control signal according to a preset detection rule;

[0075] When detecting liquid crystal screen defects, it is necessary to detect the filtering conditions of the liquid crystal screen under different bandpass conditions, so before the detection starts, a screen control signal is generated. The screen control signal refers to a continuous control signal that controls the LCD screen multiple times during one LCD screen detection process. The preset detection rules can be arranged from high to low according to the defect probability of the LCD screen; they can also ...

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Abstract

The invention discloses a method, a device and a system for detecting defects of a liquid crystal screen, relates to the technical field of detection, and aiming at solving the problem of improving the detection accuracy on the premise that the structure complexity is not added. The system comprises a center controller, a camera, a screen control panel, a liquid crystal screen, a light source control panel and a full-color backlight source, wherein the center controller is used for transmitting a screen control signal, determining an optimal light color of the full-color backlight source according to the screen control signal, generating a color control signal according to the optimal light color and transmitting the color control signal to the light source control panel; the full-color backlight source is connected with the light source control panel, and is used for receiving a light source display signal and converting colors of the full-color backlight source according to the light source display signal; and the center controller is used for detecting whether the screen image has a defect or not. The method, device and system are mainly applied to the process of detecting liquid crystal screen defects.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a method, device and system for liquid crystal screen defect detection. Background technique [0002] As the use of electronic products continues to increase, the use of liquid crystal screens applied to electronic products also continues to increase. In order to improve the quality of electronic products leaving the factory, the quality inspection of LCD screens is an indispensable link before electronic products leave the factory. The LCD screen itself does not emit light. The reason why the LCD screen can display different color images is because the signal source controls the LCD screen, so that each pixel on the LCD screen performs band-pass filtering of three wavelengths of red, green, and blue on the white backlight, and then passes through the three primary colors. Color matching is performed to achieve the purpose of displaying images of different colors. [0003] Wh...

Claims

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Application Information

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IPC IPC(8): G02F1/13
CPCG02F1/1309
Inventor 杨艺靳小利姚毅
Owner BEIJING LUSTER LIGHTTECH
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