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TFT-LCD lighting automatic optical inspection based image processing method

An automatic optical inspection and image processing technology, applied in image data processing, optical testing flaws/defects, image analysis, etc., can solve problems such as low accuracy and slow detection speed, and achieve a guaranteed detection rate and simple image processing process. Effect

Inactive Publication Date: 2014-07-09
BEIJING C&W ELECTRONICS GRP
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide an image processing method for automatic optical detection of TFT-LCD lighting, so as to overcome the defects of slow detection speed and low precision caused by manual detection in the prior art

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  • TFT-LCD lighting automatic optical inspection based image processing method
  • TFT-LCD lighting automatic optical inspection based image processing method
  • TFT-LCD lighting automatic optical inspection based image processing method

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Embodiment Construction

[0036] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] The invention uses an area-array CCD camera to collect images in different modes such as black, gray, white, red, green, and blue when the TFT-LCD screen is lit, and transmits the collected images to a computer to enter the image processing process. In the process of image processing, the ROI of the actual detection area is extracted from the image first, and then the defects in each mode are detected, and the defects are accurately positioned, the defect information is recorded, and the defect information is transmitted to the repair section.

[0038] Such as figure 1 As shown, the image processing method of TFT-LCD lighting automatic optical detection in the embo...

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Abstract

The invention relates to the technical field of image detection, and especially relates to a TFT-LCD lighting automatic optical inspection based image processing method. The image processing method comprises the following steps: acquiring images of a display screen in different modes; preprocessing the acquired images to remove the background interference; carrying out mask treatment on the preprocessed images; and carrying out defect extraction and calculation. The TFT-LCD lighting automatic optical inspection based image processing method uses a plurality of automatic optical inspection modes, can realize the normal detection of spot, line and Mura defects, and can realize the accurate positioning of light spot and light line defects to a sub-pixel, and the classification of the Mura defects according to an SEMU criterion. The image processing method has the advantages of simple flow, and effective ensure of the detection rate.

Description

technical field [0001] The invention relates to the technical field of image detection, in particular to an image processing method for automatic optical detection of TFT-LCD lighting. Background technique [0002] TFT-LCD (Thin Film Rarrsistor-Liquid Crystal Display, Thin Film Field Effect Transistor-Liquid Crystal Display) is a photoelectric display that realizes display by controlling the orientation of liquid crystal molecules with refractive index anisotropy to change the transmittance of the liquid crystal screen device, in which a thin-film transistor (TFT) acts as a switch. Compared with the traditional cathode ray tube (CathodeRayTube, CRT) display, it has the characteristics of low power consumption, long life, no radiation, and small size. In recent years, it has stood out from the fierce competition of many flat-panel displays and has become a new generation of mainstream displays, which are widely used in display fields such as notebook computers, desktop displ...

Claims

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Application Information

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IPC IPC(8): G01N21/88G06T7/00
Inventor 王新新李晨徐江伟
Owner BEIJING C&W ELECTRONICS GRP
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