Liquid crystal composite film with writing display function and preparation method thereof

Abstract

The invention discloses a liquid crystal composite film with a writing display function and a preparation method thereof. The liquid crystal composite film with the writing display function sequentially comprises from top to bottom a polyethylene terephthalate transparent film coated with a conductive polymer layer on the lower surface, an upper liquid crystal composite layer, a PET transparent film coated with a conductive polymer layer on both upper and lower surfaces, a lower liquid crystal composite layer, and an upper surface plating a PET black film with a conductive polymer layer, wherein all of the conductive layers were sputtered with silicon dioxide and coated with a polyvinyl alcohol insulating layer, and some of the insulating layers contain spacer particles. The liquid crystalcomposite film with the writing display function creatively adopts a double-layer liquid crystal film, and the double-layer rotation to different liquid crystals not only improves the brightness of the handwriting display, but also allows the upper and lower layers of liquid crystal to reflect different colors of light.

Description

technical field [0001] The invention belongs to the field of liquid crystal display, in particular to a writing board with color display and a preparation method thereof. Background technique [0002] The writable color display writing board can replace writing tools such as blackboards or whiteboards used in education, office and other fields in the future. This film utilizes the bistable characteristics of liquid crystals, and has the characteristics of showing a light reflection state under writing pressure, and the writing can be completely erased when a voltage is applied. Specifically, this film can achieve perfect writing only by reflecting external light when writing, thereby achieving the purpose of reducing product power consumption. Secondly, this kind of film can be written with only fingertip-like tools without using any consumables. In particular, it can let teachers say goodbye to the chalk dust brought by traditional chalk and protect the health of teachers....

AI Technical Summary

Problems solved by technology

[0003] At present, the structure of the traditional liquid crystal composite film used by manufacturers of liquid crystal handwriting tablets is that the liquid crystal polymer is directly poured between the PET transparent film and the PET (polyethylene terephthalate) black film. The advantage is that the production process is simple and the production cycle is short. However, the color of the tablet produced by the current manufacturer is relatively monotonous, and it can only display one color, or display the corresponding color in a fixed area, and it is impossible to choose the color of the writing.

This will bring a lot of inconvenience in practical applications. For example, in order to highlight some contrasting content, it is impossible to use different handwriting to represent the contrast, which greatly limits the scope of application of the LCD tablet in practice.

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