Electronic copying plate based on cholesterol liquid crystal

Abstract

The utility model relates to an electronic copying board based on cholesterol liquid crystal, which comprises a handwriting board used for copying, an electronic paper module used for displaying images and a power supply module, the handwriting board is arranged above the electronic paper module, a transparent substrate is arranged between the handwriting board and the electronic paper module, and the power supply module is respectively and electrically connected with the handwriting board and the electronic paper module. The handwriting board comprises a first transparent ITO conducting film, cholesterol liquid crystal and a second transparent ITO conducting film which are sequentially connected in a stacked mode, and the electronic paper module comprises a display module and a driving circuit used for driving the display module to display. The handwriting board displays handwriting through pen point contact pressure, no power is consumed during writing, no power is consumed when the electronic paper module does not update content, and the problem of energy consumption of an electronic copying board in the prior art is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drawing technical field, concretely relates to an electronic tracing board based on cholesteric liquid crystal. BACKGROUND

[0002] Traditional tracing board mainly adopts transparent plastic plate or glass plate, and places drawing paper under the plate to carry out manual tracing. This method meets the basic tracing demand to a certain extent, but its inherent limitations are increasingly highlighted. First, the accuracy in the hand-drawing process is difficult to guarantee, and is easily affected by human factors, resulting in deviation between the traced work and the original drawing. Secondly, when using the traditional tracing board, the user needs to manually adjust the position and angle of the drawing paper, which is time-consuming and laborious and also reduces work efficiency. Thirdly, the traditional tracing board is relatively large in size and is inconvenient to carry, limiting the diversity of its use scenarios.

[0003] With the progress of science and technology, electronic drawing boards are gradually applied in the fields of drawing and design. Although they are powerful and can provide users with more convenient and efficient drawing experience, their operation is relatively complex, and they need to be powered continuously for the display screen when writing, and there is a certain delay in the display of the display screen, resulting in high energy consumption. At the same time, the display screen still needs to consume a certain amount of electric energy to maintain the screen display without updating, further exacerbating the energy consumption problem.

[0004] Therefore, there is an urgent need to provide an electronic tracing board based on cholesteric liquid crystal to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the deficiencies and defects of the prior art, and provides an electronic tracing board based on cholesteric liquid crystal. The handwriting board displays handwriting through pen tip contact pressure, and does not consume electricity when writing. The electronic paper module does not consume electricity when not updating content, effectively solving the energy consumption problem of the electronic tracing board.

[0006] The utility model aims at overcoming the deficiencies and defects of the prior art, and provides an electronic tracing board based on cholesteric liquid crystal. The handwriting board displays handwriting through pen tip contact pressure, and does not consume electricity when writing. The electronic paper module does not consume electricity when not updating content, effectively solving the energy consumption problem of the electronic tracing board.

[0007] An electronic tracing board based on cholesteric liquid crystal, comprising a handwriting board for tracing, an electronic paper module for displaying images, and a power module. The handwriting board is arranged above the electronic paper module, and a transparent substrate is arranged between the handwriting board and the electronic paper module. The power module is electrically connected with the handwriting board and the electronic paper module respectively. The handwriting board comprises a first transparent ITO conductive film, cholesteric liquid crystal, and a second transparent ITO conductive film which are connected in sequence. The electronic paper module comprises a display module and a driving circuit for driving the display module to display.

[0008] As a preferred technical scheme of the utility model, the power module includes a battery and a battery charging and discharging circuit, the battery is electrically connected with the battery charging and discharging circuit, and the battery is electrically connected with the handwriting board and the electronic paper module respectively.

[0009] As a preferred technical scheme of the utility model, the display module is an electronic paper display module.

[0010] As a preferred technical scheme of the utility model, the electronic paper module further includes a circuit board, and the display module is connected with the driving circuit through the circuit board.

[0011] Compared with the prior art, the utility model has the beneficial effects as follows:

[0012] The utility model utilizes the bistable characteristic of cholesteric liquid crystal, so that the handwriting board does not consume electric energy during writing or rewriting without erasing. Meanwhile, the electronic paper module adopts low-power CHLCD or ink screen, and does not consume electric energy when displaying static images and not updating, so that the electronic tracing board can save a large amount of electric energy during long-time use, and meet the demand of users for high-precision, high-efficiency, portability and low-energy-consumption tracing tools. The handwriting board displays handwriting through pen tip contact pressure, without additional electric energy, and effectively solves the energy consumption problem in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a front structure schematic view of the utility model.

[0014] Among them, the above-mentioned drawing includes the following sign:

[0015] 1, handwriting board, 11, first transparent ITO conductive film, 12, cholesteric liquid crystal, 13, second transparent ITO conductive film, 2, electronic paper module 3, transparent substrate. DETAILED DESCRIPTION

[0016] The utility model will be described in further detail in combination with embodiments and drawings, but the embodiment of the utility model is not limited to this.

[0017] The specific implementation process of the utility model is as follows:

[0018] For example, Figure 1As shown, a kind of electronic sketchpad based on cholesterol liquid crystal includes electronic paper module 2 for displaying image and power module for sketching handwriting board 1, handwriting board 1 is arranged above electronic paper module 2, transparent substrate 3 is arranged between handwriting board 1 and electronic paper module 2, power module is electrically connected with handwriting board 1 and electronic paper module 2 respectively, handwriting board 1 includes first transparent ITO conductive film, cholesterol liquid crystal 12 and second transparent ITO conductive film which are connected in sequence, electronic paper module 2 includes display module, circuit board and driving circuit for driving display module to display.

[0019] Specifically, handwriting board 1 is used for sketching, electronic paper module 2 is used for displaying image to provide reference for sketching, and power module is used for powering handwriting board 1 and electronic paper module 2 to ensure normal work. Handwriting board 1 is designed to be transparent, so that user can clearly see the image or text displayed by electronic paper module 2 arranged below during sketching. The working principle of handwriting board 1 is based on physical phase change of cholesterol liquid crystal when it is pressed to realize writing and display functions, and the display content is cleared by electric field to realize rewriting function. Cholesterol liquid crystal 12 has bistable characteristic, when handwriting board 1 is pressed, cholesterol liquid crystal 12 will change accordingly to change its optical properties, and display the image or text written by user, second transparent ITO conductive film is opposite to first transparent ITO conductive film to jointly constitute the capacitance sensing structure of handwriting board 1, after applying electric field, cholesterol liquid crystal becomes transparent, and after removing electric field, cholesterol liquid crystal can still maintain transparent state, and no power is consumed during writing process or rewriting without erasing. Display module is connected with driving circuit through circuit board, driving circuit is used for controlling display content and updating of display module to display image or text for facilitating sketching of handwriting board 1. Display module is electronic paper display module, which can be full-color CHLCD, monochrome CHLCD or ink screen, etc., can present high-definition image and text, and has low power consumption, no power is consumed in the case of displaying static image and not updating, has characteristics of high definition and eye protection, etc., is suitable for long-time reading and sketching. Electronic paper module 2 adopts dot matrix display technology, the displayed image and text are more delicate and clear, and more flexible display effect can be realized, has low power consumption, can greatly reduce the energy consumption of electronic paper module 2 to prolong its use time. Transparent substrate 3 is made of material with high transparency and good mechanical properties to ensure that user can clearly see the content of lower layer. Transparent substrate 3 is arranged between electronic paper module 2 and handwriting board 1 to play a role of isolation and protection, avoids direct contact between electronic paper module 2 and handwriting board 1 to protect the flatness of bottom surface of handwriting board 1. At the same time, it ensures that handwriting board 1 will not interfere with lower electronic paper module 2 during writing, avoids that the originally displayed image or text is changed due to pressure point caused by external pressure when using electronic paper display module such as CHLCD, so that electronic paper module 2 can be compatible with multiple display module types.

[0020] In the embodiment of the utility model, power module includes battery and battery charge and discharge circuit, battery and battery charge and discharge circuit electricity is connected, battery respectively with handwriting board 1 and electronic paper module 2 electricity is connected.Power charge and discharge circuit board is used for managing and controlling the charging and discharging process of battery to ensure that battery can charge and discharge safely and efficiently, provides stable power supply for handwriting board 1 and electronic paper module 2.Battery can adopt rechargeable battery or USB power supply mode, and the user can power supply for the copy handwriting board 1 and electronic paper module 2 at any time, so that the copy handwriting board 1 can be used at any time and anywhere, meet the various needs of the user.

[0021] The above-described embodiments only express the implementation of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A cholesteric liquid crystal based electronic sketchpad, characterized in that, The application relates to a handwriting board for copying, an electronic paper module for displaying images and a power module, wherein the handwriting board is arranged above the electronic paper module, a transparent substrate is arranged between the handwriting board and the electronic paper module, the power module is electrically connected with the handwriting board and the electronic paper module respectively, the handwriting board comprises a first transparent ITO conductive film, cholesteric liquid crystal and a second transparent ITO conductive film which are sequentially connected in layers, and the electronic paper module comprises a display module and a driving circuit for driving the display module to display.

2. A cholesteric liquid crystal based electronic sketchpad according to claim 1, wherein, The power module comprises a battery and a battery charging and discharging circuit, the battery is electrically connected with the battery charging and discharging circuit, and the battery is electrically connected with the handwriting board and the electronic paper module respectively.

3. A cholesteric liquid crystal based electronic sketchpad according to claim 1, wherein, The display module is an electronic paper display module.

4. The electronic sketchpad based on cholesteric liquid crystal according to claim 1, wherein, The electronic paper module further comprises a circuit board, and the display module and the driving circuit are connected through the circuit board.

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