Liquid crystal display substrate and manufacturing method thereof

Abstract

The invention provides a liquid crystal display substrate and a manufacturing method thereof. The liquid crystal display substrate comprises a TFT (Thin Film Transistor) substrate, a CF (Color Filter) substrate and a liquid crystal clamped between the TFT substrate and the CF substrate, wherein the liquid crystal display substrate is provided with a display area and a cutting area which are cut into a plurality of small substrates; an alignment film is arranged on the CF substrate or the TFT substrate and comprises a molecular main chain parallel to the CF substrate and a photosensitive sensing side chain perpendicular to the molecular main chain; a dye side chain parallel to the photosensitive sensing side chain is arranged in the cutting area; and an included angle between the dye side chain and the substrate is identical with a pretilt angle of the liquid crystal. According to the invention, after the liquid crystal display substrate is aligned by ultraviolet light, the pretilt angle of the liquid crystal can be obtained by measuring the brightness change of linearly polarized light of the alignment film, the problem that the online detection of the pretilt angle of the liquid crystal cannot be realized after the light alignment project is ended and before the box forming project is finished is solved and the online feedback and error correction can be carried out.

Description

technical field [0001] The invention relates to a liquid crystal display with ultraviolet light alignment and a manufacturing method thereof. Background technique [0002] Traditional CRT monitors rely on cathode ray tubes to emit electrons and strike phosphors on the screen to display images, but liquid crystal displays work on a completely different principle. Generally, a liquid crystal display (LCD) device has an upper substrate and a lower substrate spaced apart from each other and facing each other. A plurality of electrodes formed on the two substrates face each other. The liquid crystal is sandwiched between the upper and lower substrates. A voltage is applied to the liquid crystal through the electrodes on the substrate, and then the alignment of the liquid crystal molecules is changed according to the applied voltage to display images. Because the liquid crystal display device does not emit light as mentioned above, it needs a light source to display images. The...

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Problems solved by technology

[0010] At present, the measurement of the pretilt angle α after optical alignment can only be measured by ellipsometry after the filling of the liquid crystal into the cell is completed. After that, it is known whether the angle meets the specification requirements. If it does not meet the requirements, the production line has already had a large backlog. Defective products from optical alignment engineering to box-making engineering cannot realize online measurement and error correction

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