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Liquid crystal writing device voltage control system and method for realizing local erasing

A technology for a voltage control system and a writing device, which is applied in nonlinear optics, static indicators, optics, etc., can solve the problems of occupying space, complex circuit structure, and many circuit components, so as to reduce production costs, simplify circuit structure, Good user experience

Pending Publication Date: 2022-04-15
SHANDONG LANBEISITE EDUCATIONAL EQUIP GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the voltage driving circuit of the above-mentioned liquid crystal writing device, the input power is often used to connect the DC / DC converter through the interface connector, after the input power is converted into the voltage required by the TFT, and then the first wire and the first wire of each row are connected through the gate circuit The second wire of each column is loaded with a set voltage; in this way, each gating circuit component is set separately, which needs to occupy a certain space, which is not conducive to the miniaturization of the circuit structure of the writing device and the thinning of the product; In addition, there are many circuit components involved, the circuit structure is complex, the failure rate is high, and the circuit cost is also high.

Method used

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  • Liquid crystal writing device voltage control system and method for realizing local erasing
  • Liquid crystal writing device voltage control system and method for realizing local erasing
  • Liquid crystal writing device voltage control system and method for realizing local erasing

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Embodiment 1

[0031] In one or more embodiments, a liquid crystal writing device voltage control system for realizing partial erasing is disclosed.

[0032] Wherein, the liquid crystal writing device includes: a conductive layer, a bistable liquid crystal layer and a base layer arranged in sequence; the conductive layer is not divided; refer to figure 1 A number of pixel units arranged in an array are integrated on the base layer, and each pixel unit is provided with a pixel electrode and a TFT connected to the pixel electrode; a number of first wires that are supplied with a control voltage for turning on or off the TFT; a plurality of second wires supplying the TFT input voltage;

[0033] refer to figure 1 , the first wire is shared by the pixel units in the same row, and the second wire is shared by the pixel units in the same column. In this embodiment, corresponding to each vertical column and each horizontal row of the pixel unit, a plurality of first wires and a plurality of second...

Embodiment 2

[0055] In one or more embodiments, a liquid crystal writing device voltage control method for realizing partial erasing is disclosed, including:

[0056] Connecting the first wires on the base layer of the liquid crystal writing device to different output terminals of the first VFD drive chipset;

[0057] Connecting each second wire on the base layer of the liquid crystal writing device to different output terminals of the second VFD driving chipset;

[0058] Apply a set voltage to the conductive layer, and control the output voltages of the output terminals of the first VFD driver chip set and the second VFD driver chip set through the main controller, so that the pixel unit covering the partial erasing area on the base layer and the conductive layer The electric field between them reaches the erasing electric field, which can realize partial erasing; while the electric field formed in other regions cannot realize erasing.

[0059] It should be noted that the specific implem...

Embodiment 3

[0061] In one or more embodiments, a liquid crystal writing device with partial erasing function is disclosed, including a conductive layer, a bistable liquid crystal layer and a base layer arranged in sequence; the conductive layer is not divided; an array is integrated on the base layer A number of pixel units arranged in a shape, each pixel unit is provided with a pixel electrode and a TFT connected to the pixel electrode; a number of first wires that are supplied with a control voltage for turning on or off the TFT; a number of first wires that are supplied with an input voltage for the TFT two wires;

[0062] The first wire is shared by the pixel units in the same row, and the second wire is shared by the pixel units in the same column. In this embodiment, corresponding to each vertical column and each horizontal row of the pixel unit, a plurality of first wires and a plurality of second wires are respectively integrated; the layout directions of the first wires and the s...

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Abstract

The invention discloses a liquid crystal writing device voltage control system and method for achieving local erasing. The system comprises a main controller, a first VFD driving chip set and a second VFD driving chip set, wherein the first VFD driving chip set and the second VFD driving chip set are connected with the main controller. Each first wire on the substrate layer is connected with different output terminals of the first VFD driving chip set, and each second wire on the substrate layer is connected with different output terminals of the second VFD driving chip set; the main controller controls the output voltage of each output terminal of the first VFD driving chip set and the second VFD driving chip set, so that an electric field formed between a pixel unit covering a local erasing area on the substrate layer and the conductive layer can reach an erasing electric field, and local erasing is realized; and the electric fields formed in other areas cannot realize erasing. The main controller directly controls the VFD driving chip set to output the set voltage, a complex circuit structure is not needed, and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of partial erasing of a liquid crystal writing device, in particular to a liquid crystal writing device voltage control system and method for realizing partial erasing. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The working principle of the current liquid crystal writing devices on the market is to use the bistable characteristics of liquid crystals to display and / or erase the written content on the liquid crystal writing board. For example, with cholesteric liquid crystal as the middle liquid crystal layer, the writing pressure track of the writing pen is recorded by the pressure acting on the liquid crystal writing device, and then the corresponding writing content is displayed; the structure of the cholesteric liquid crystal is changed by applying an electric field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G02F1/137G02F1/139G09G3/36
Inventor 李清波杨猛训李泉堂王修亮耿首元武晓娟
Owner SHANDONG LANBEISITE EDUCATIONAL EQUIP GRP
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