Method for producing choles phase liquid crystal high-molecular optical reinforced film

Abstract

The invention is a cholesteric liquid crystal high molecular light intensifying film preparing method, belonging to the field of LCD light intensifying film technique. And the process: liquid crystal high molecules placed in between two transparent plastic films and shows in cholesteric phase between glass transition temperature and 280 deg.C, are made into thin film in the liquid crystal-phase temperature range in the rolling mode, heating the liquid crystal high molecular film to temperature T so that cholesteric liquid crystal molecules form plane structured molecular arrangement mode, then placing the thin film on a temperature control table with temperature T1, keeping the spatial temperature of the outer surface of the upper transparent plastic film be equal to T2, cooling so that the cholesteric liquid crystal high molecular film forms pitch gradient in the direction vertical to the surfaces of the two transparent plastic films; and the pitch gradient is frozen in the glass state of the cholesteric liquid crystal high molecules. And its advantages: the selected material system and the making process are simple and convenient, and the optical performance is excellent.

Description

technical field

[0001] The invention belongs to the technical field of light-enhancing films for liquid crystal displays, and relates to a preparation method of a cholesteric liquid crystal polymer light-enhancing film. The preparation process is simple and the optical properties are excellent. Background technique

[0002] Backlight technology is one of the core technologies of TFT-LCD, accounting for 25% to 35% of the total cost of TFT-LCD (notebook computer display: about 25%; LCD TV display: 30% to 35%). The light enhancement film accounts for 30% to 40% of the cost of the backlight system. At present, people put forward higher requirements for low power consumption and long-time standby of liquid crystal displays. As we all know, the liquid crystal itself does not emit light, and needs a backlight source to support the light emission. The brightness of the liquid crystal display affects the quality of the image to a certain extent. However, the backlight system accoun...

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