Optical alignment detection unit and optical alignment method and device

Abstract

The application discloses an optical alignment detection unit and an optical alignment method and device, wherein the optical alignment detection unit comprises a substrate; the substrate is providedwith an optical alignment indicative layer that is provided with an optical alignment PI (propidium iodide) liquid layer. The optical alignment detection unit and the optical alignment method and device have the advantages that the optical alignment indicative layer is provided, PI liquid generates macromolecular chains containing aniline groups after being exposed to ultraviolet, an indicator inthe optical alignment indicative layer is used for monitoring the amount of aniline groups, the aniline groups react with the indicator to generate a colored pigment after the aniline groups exist, and particularly, the optical alignment detection unit changes the color finally; color changes of glass coated with the indicator are judged at last to judge optical alignment process and uniformity; irradiating brightness and time of an ultraviolet lamp are controlled according to the color changes, so that uniform optical alignment is achieved and it is avoided that overexposure causes adverse effect on optical properties of products.

Description

technical field [0001] The present application generally relates to the field of display technology, and in particular relates to a photo-alignment detection unit, a photo-alignment method and a device. Background technique [0002] At present, most of the display devices are flat panel displays, TFT-LCD (Thin Film Transistor-Liquid Crystal Display; Thin Film Transistor Liquid Crystal Display English) panels and OLED (Organic Light-Emitting Diode; Organic Light-Emitting Diode) panels due to their good viewing angle and lower Power consumption, is widely used in the field of flat panel display. [0003] At present, high-end TFT-LCD products generally use optical alignment technology. Compared with traditional rubbing products, optical alignment products have higher contrast, and there is no rubbing mura phenomenon, and the image quality is better. [0004] However, the optical alignment technology has high energy consumption, long takt time (TACT time), large alignment fluct...

AI Technical Summary

Problems solved by technology

During the photo-alignment process, the uniformity of PI liquid and UV light source will lead to the inhomogeneity of alignment

In addition, in order to ensure that the photoalignment PI liquid can be completely decomposed or polymerized, the glass substrate is in an overexposed state. Generally, the luminous flux of the photoalignment must be large enough, so that the energy consumption is high, and the overexposure will cause damage to the performance of the TFT at some positions, affecting The electrical properties of the product, or the phenomenon of dye deterioration in the color filter material, affect the optical properties of the product

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