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High brightness liquid crystal writing device

A writing device and high-brightness technology, applied in nonlinear optics, instruments, optics, etc., can solve the problems of large thickness and excessive erasing voltage, and achieve the effect of simplifying the process, improving the feasibility, and ensuring the brightness

Inactive Publication Date: 2019-06-07
LINNDENN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the liquid crystal isolation layer is used as the isolation and support substrate between the upper display material layer and the lower display material layer, it needs to have a certain hardness (in this application, PET film or half-wave plate is used), and its thickness is often large, resulting in It is necessary to apply a huge erasing voltage between the upper display material layer and the lower display material layer in order to form a sufficient electric field for erasing. However, if the erasing voltage is too large, it will greatly affect the entire solution of the liquid crystal writing device. disadvantages

Method used

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Experimental program
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Effect test

Embodiment 1

[0065] The liquid crystal writing device of the first embodiment includes a liquid crystal writing screen 100 and an electronic circuit 180. Among them, the LCD writing screen 100 such as figure 1 As shown, it includes three substrate layers and two liquid crystal writing layers, specifically a first substrate layer 110, a first liquid crystal writing layer, an intermediate support layer 170, a second liquid crystal writing layer, and a second substrate that are sequentially stacked Layer 190.

[0066] The first liquid crystal writing layer and the second liquid crystal writing layer have the same structure, including a display material layer, two erasing conductive layers located on the upper and lower sides of the display material layer, and respectively located between the erasing conductive layer and the display material layer. The two insulating layers in between are specifically the first erasing conductive layer 120, the first insulating layer 130, the display material lay...

Embodiment 2

[0081] The main difference between the second embodiment and the first embodiment is that the liquid crystal writing device of this embodiment can realize partial erasing.

[0082] The difference between the liquid crystal writing screen 100 of this embodiment and the first embodiment is as follows:

[0083] The first erasing conductive layer 120 of the first liquid crystal writing layer and the second liquid crystal writing layer are both complete conductive layers, and the second erasing conductive layer 160 of the first liquid crystal writing layer and the second liquid crystal writing layer is provided with A plurality of conductive blocks 143 insulated from each other to form an array of conductive blocks, such as Figure 4 Shown. The conductive block 143 may be square, rectangular, parallelogram, hexagonal or other shapes of uniformly arranged blocks of equal size, or blocks of different sizes and different shapes, as long as it can partially cover the display material layer ...

Embodiment 3

[0098] The liquid crystal writing device of the third embodiment is roughly the same as that of the second embodiment, the main differences are:

[0099] First, replace the infrared touch screen 200 with a key input device. The key input device such as Figure 7 As shown, corresponding to the row of each conductive block 143, there is a button and an indicator light indicating the state of the button on one side of the writing area. The indicator light is on when the button is pressed, otherwise the indicator light is off; corresponding to each conductive block 143 In the column, there is a button and an indicator light indicating the state of the button on the upper or lower side of the writing area. The indicator light is on when the button is pressed, otherwise the indicator light is off. Look at the row and column where the position to be erased is located, and press the key corresponding to the row and column respectively to erase the written content on the position to be er...

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Abstract

The invention discloses a high brightness liquid crystal writing device. The high brightness liquid crystal writing device comprises at least two display material layers, at least one intermediate support layer and erasure conductive layers, wherein the display material layers comprise cholesterol liquid crystals; the intermediate support layers are arranged between every two display material layers; and the erasure conductive layers are separately arranged on the two sides of each display material layer, when at least a portion of each erasure conductive layer on both sides of the display material layer separately accesses to erasure voltage signals, an electric field is formed between access parts of the two erasure conductive layers, and writing marks of areas of the relatively coated display material layers are erased. Therefore, while retaining the scheme of the double layer display material layers in the prior art (but the high brightness liquid crystal writing device is not limited to the double layers), the two erasure conductive layers separately located on both sides of each display material layer for aiming at the display material layers independent erasure to solve theproblem of excessive voltage, meanwhile, incident light can be double reflected through two or more display material layers, and the effect of enhancing the brightness is realized.

Description

Technical field [0001] The invention relates to a liquid crystal writing device. Background technique [0002] Current liquid crystal writing screens mostly use cholesteric liquid crystal as the liquid crystal display material. Cholesteric liquid crystals are formed by adding a proper proportion of chiral agents to nematic liquid crystals. The chiral agents make the long axis directions of the molecules of each layer of the multilayer nematic liquid crystals gradually rotate by an angle to form a spiral. This structure is similar to cholesterol molecules in animals, so it is called cholesterol liquid crystal, also called cholesteric liquid crystal. Cholesteric liquid crystals have three different molecular arrangement structures. The first is Plannar Texture, called P state; the second is Focal Conic Texture, called FC state. ; The third is the homeotropic texture state, called the H state. In the P state, the cholesteric liquid crystal reflects light of a specific wavelength ...

Claims

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Application Information

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IPC IPC(8): G02F1/137G02F1/1337G02F1/1333
CPCG02F1/1333G02F1/1337G02F1/137
Inventor 郑明炜
Owner LINNDENN TECH CO LTD
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