Macroscopic inspection device and macroscopic inspection method

Abstract

The invention discloses a macroscopic inspection device and a macroscopic inspection method. The macroscopic inspection device comprises a lighting module, a lifting module and a pressing module, wherein the lighting module is used for simulating lighting of a panel without a TFT lateral polaroid, the lifting module is arranged at one side of the lighting module in a spaced mode, can move in the vertical direction and is internally provided with an operation panel used for controlling the height of the lifting module, and the pressing module is used for making contact with and pressing a substrate on the surface of the pressing panel so as to observe the surface of the substrate obtained after pressing. By putting the panel without the TFT lateral polaroid beside the lighting module and arranging the lifting module opposite to the panel, the TFT lateral polaroid and the pressing mechanism can move up and down along with the lifting module, after the lighting module is started, the substrate can be subjected to macroscopic inspection by penetrating the TFT lateral polaroid, by pressing different parts of the substrate through the pressing mechanism, detection can be effectively conducted on an alignment anomaly caused by HVA optical alignment, the phenomenon that the HVA alignment anomaly leaks to secondary lighting to cause a lot of scraps is avoided, and therefore the product yield is increased, and the production line stability is improved.

Description

technical field [0001] The invention relates to the technical field of panel manufacturing, in particular to a macroscopic inspection device and a macroscopic inspection method. Background technique [0002] HVA optical alignment technology is a kind of liquid crystal alignment technology in the production process of TFT LCD (Thin Film Transistor Liquid Crystal Display, thin film transistor liquid crystal display) liquid crystal panel. , and then through UV (Ultra-Violet Ray, ie ultraviolet) light irradiation to make the polymer monomers in the substrate react, so as to achieve the purpose of liquid crystal alignment, a photo-alignment technology. Compared with traditional friction alignment, it has the advantages of high contrast, wide viewing angle, less static electricity and particles, and has gradually become the mainstream technology for large-size LCD panel production. [0003] In the production process of HVA photo-alignment products, after the secondary UV alignmen...

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Problems solved by technology

[0005] However, although the current HVA macroscopic inspection machine can detect most of the alignment anomalies, there are still some alignment anomalies that cannot be detected. For example, the alignment anomalies caused by a common electrode without signal input during a UV alignment cannot be observed through static switching screens. , you need to press the substrate with TFT (thin film transistor array) polarizer and CF (color filter, color filter) polarizer to check when the second lighting is on, if the screen can be restored within a short time (within 1s) press If the screen cannot return to the state before pressing for a long time (generally more than 2s), then the substrate is defective

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