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A high-brightness liquid crystal writing device

A writing device and high-brightness technology, applied in instruments, nonlinear optics, optics, etc., can solve problems such as large thickness and excessive erasing voltage

Inactive Publication Date: 2021-09-21
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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  • A high-brightness liquid crystal writing device
  • A high-brightness liquid crystal writing device
  • A high-brightness liquid crystal writing device

Examples

Experimental program
Comparison scheme
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 liquid crystal writing screen 100 such as figure 1 As shown, it includes three substrate layers and two liquid crystal writing layers, specifically the first substrate layer 110, the first liquid crystal writing layer, the intermediate support layer 170, the second liquid crystal writing layer and the second substrate layer stacked in sequence 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 erasable conductive layer and the display material layer. Specifically, the first erasing conductive layer 120 , the first insulating layer 130 , the display material layer 140 , the seco...

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 the present embodiment and the first embodiment is as follows:

[0083] Both the first erasing conductive layer 120 of the first liquid crystal writing layer and the second liquid crystal writing layer are 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 form a conductive block array, such as Figure 4 shown. The conductive block 143 can be square, rectangular, parallelogram, hexagonal or evenly arranged blocks of equal size and shape, or blocks of different sizes and shapes, as long as the display material layer 140 can be partially covered, corresp...

Embodiment 3

[0098] The liquid crystal writing device of this embodiment three is roughly the same as that of embodiment two, the main difference is:

[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 where each conductive block 143 is located, a button and an indicator light indicating the state of the button are arranged 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 The column where it is located is provided with 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 buttons corresponding to the row and column respectively to erase th...

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Abstract

A high-brightness liquid crystal writing device, comprising: at least two display material layers, the display material layers comprising cholesteric liquid crystal; at least one intermediate support layer, the intermediate support layer is arranged between every two display material layers; each display material layer Both sides of the layer are respectively provided with an erasing conductive layer, and when at least a part of each erasing conductive layer on both sides of the display material layer is respectively connected to the erasing voltage signal, the connection between the two erasing conductive layers forms between the access parts The electric field, which relatively covers the area of ​​the display material layer where the writing traces are erased. Therefore, the present invention retains the solution of the double-layer display material layer in the prior art (but the present invention is not limited to the double-layer), by disposing two erasing conductive layers on both sides of each display material layer respectively , to independently erase the display material layer to solve the problem of excessive erasing voltage, and at the same time, the incident light can be double-reflected by two or more display material layers to achieve the effect of enhancing brightness.

Description

technical field [0001] The invention relates to a liquid crystal writing device. Background technique [0002] Most current liquid crystal writing screens use cholesteric liquid crystals as liquid crystal display materials. Cholesteric liquid crystals are formed by adding an appropriate proportion of chiral agents to nematic liquid crystals. The chiral agents make the long axis directions of the molecules of each layer of multilayer nematic liquid crystals gradually rotate by an angle, forming a helical shape. This structure is similar to the cholesterol molecules in animals, so it is called cholesterol liquid crystal, also known as cholesteric liquid crystal. Cholesteric liquid crystals have three different molecular arrangements, the first is the planar texture state (Plannar Texture), called the P state; the second is the focal conic texture state (Focal Conic Texture), called the FC state ; The third is the vertical texture state (Homeotropic Texture), known as the H s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/137G02F1/1337G02F1/1333
CPCG02F1/1333G02F1/1337G02F1/137
Inventor 郑明炜
Owner LINNDENN TECH CO LTD
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