Bistable cholesteric liquid crystal writing device capable of being erased locally

Abstract

The utility model belongs to the field of handwriting boards, and particularly relates to partially erasable bistable cholesteric liquid crystal writing equipment which comprises a handwriting board and a handwriting pen. The handwriting board comprises a first electric connection joint and a bendable bistable cholesteric liquid crystal display panel; the handwriting pen comprises a pen holder sleeve shell, an erasing driving structure, an erasing control key and a second electric connection joint, the pen holder sleeve shell is in a rod shape and is divided into an upper rod section and a lower rod section which are detachably connected and arranged up and down, and the erasing driving structure is arranged in the pen holder sleeve shell; the second electric connection joint and the first electric connection joint can be electrically connected with each other when the second electric connection joint and the first electric connection joint are in butt joint, and an erasing voltage is applied to the bistable cholesteric liquid crystal display panel; the erasing control key is used for controlling the erasing driving structure to apply global erasing voltage or local erasing voltage to the bistable cholesteric liquid crystal display panel. According to the utility model, the erasing circuit structure is removed from the handwriting board, so that the handwriting board presents a paper-like form and is thinner.

Description

Technical Field

[0001] The utility model belongs to the field of handwriting boards, and in particular relates to a partially erasable bistable cholesteric liquid crystal writing device. Background Art

[0002] With the continuous development of science and technology, handwriting tablets have gradually gained popularity as a convenient digital input tool. However, most handwriting tablets on the market have a common problem, that is, they are relatively thick and cannot be as light and easy to use as ordinary paper. This defect has largely limited the scope of use and convenience of handwriting tablets in daily life. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a partially erasable bistable cholesteric liquid crystal writing device, which aims to solve the problem of relatively thick handwriting board.

[0004] The utility model provides a partially erasable bistable cholesteric liquid crystal writing device, comprising a handwriting board and a handwriting pen;

[0005] The handwriting board includes a first electrical connection connector and a bendable bistable cholesteric liquid crystal display panel;

[0006] The stylus comprises a pen housing, an erasing drive structure, an erasing control button and a second electrical connection connector. The pen housing is arranged in a rod shape and is divided into an upper rod section and a lower rod section which are detachably connected and arranged up and down. The erasing drive structure is arranged in the pen housing and can be electrically connected to each other when the second electrical connection connector and the first electrical connection connector are docked, and apply an erasing voltage to the bistable cholesteric liquid crystal display panel. The erasing control button is arranged in the pen housing, and is used to control the erasing drive structure to apply a global erasing voltage or a local erasing voltage to the bistable cholesteric liquid crystal display panel.

[0007] Optionally, the erasing drive structure is fixed to the upper rod section, the second electrical connection connector is provided at the upper end of the upper rod section, and a pen tip structure is formed at the lower end of the lower rod section.

[0008] Optionally, the erase drive structure includes a PCB board and a battery. The PCB board is fixed to the upper rod section and is provided with an erase circuit for generating an erase voltage. The PCB board is also electrically connected to the second electrical connection connector. The battery is electrically connected to the PCB board and is fixed to the PCB board.

[0009] Optionally, the PCB board is detachably connected to the battery.

[0010] Optionally, the pen tip structure is detachably connected to the lower rod section.

[0011] Optionally, the upper rod section forms a cylindrical clamping portion, and the clamping portion can penetrate into the lower rod section and be clamped and matched with the lower rod section.

[0012] Optionally, at least one clamping protrusion is provided on the periphery of the clamping portion;

[0013] At least one clamping groove is arranged in the lower rod section, and each clamping groove is arranged corresponding to one clamping protrusion.

[0014] Optionally, the upper rod segment and the lower rod segment are threadedly coupled.

[0015] Optionally, the bistable cholesteric liquid crystal display panel has a thickness of 0.2 mm-2 mm.

[0016] Optionally, the bistable cholesteric liquid crystal display panel is a semi-transparent bistable cholesteric liquid crystal display panel or a semi-transparent color body bistable cholesteric liquid crystal display panel.

[0017] Based on the structural design of the utility model, the erasing circuit structure that was originally required to be set on the handwriting board is removed, so that the handwriting board presents a paper-like shape and is thinner. This design also makes the handwriting board lighter and easier to carry, and users can use it anytime and anywhere, such as using it as a bookmark. At the same time, the stylus adopts a detachable design, which is convenient for replacement and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a front view of a partially erasable bistable cholesteric liquid crystal writing device provided by an embodiment of the utility model;

[0020] Figure 2 It is an exploded view of the stylus provided in the embodiment of the utility model.

[0021] Description of Figure Numbers:

[0022] Label name Label name 100 Handwriting tablet 110 First electrical connection terminal 120 Bistable cholesteric liquid crystal display panel 200 Stylus 210 Pen case 211 Upper pole section 2111 Card connection 212 Lower rod section 2121 Nib structure 220 Erase drive structure 221 PCB board 222 Battery 230 Erase control button 240 Second electrical connection connector DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] The embodiment of the utility model provides a partially erasable bistable cholesteric liquid crystal writing device.

[0025] See also Figure 1 and Figure 2 The locally erasable bistable cholesteric liquid crystal writing device includes a handwriting board 100 and a handwriting pen 200.

[0026] The handwriting board 100 includes a first electrical connection connector 110 and a flexible bistable cholesteric liquid crystal display panel 120; it should be noted that the bistable cholesteric liquid crystal display panel 120 is a translucent bistable cholesteric liquid crystal display panel 120 or a translucent color body bistable cholesteric liquid crystal display panel 120, which can be selected according to actual needs.

[0027] The stylus 200 includes a pen housing 210, an erasing drive structure 220, an erasing control button 230 and a second electrical connection connector 240. The pen housing 210 is arranged in a rod shape and is divided into an upper rod section 211 and a lower rod section 212 which are detachably connected and arranged up and down. The erasing drive structure 220 is arranged in the pen housing 210 and can apply an erasing voltage to the bistable cholesteric liquid crystal display panel 120 when the second electrical connection connector 240 is connected to the first electrical connection connector 110. The erasing control button 230 is arranged in the pen housing 210. The erasing control button 230 is used to control the erasing drive structure 220 to apply a global erasing voltage or a local erasing voltage to the bistable cholesteric liquid crystal display panel 120.

[0028] Based on the structural design of the utility model, the erasing circuit structure that was originally required to be set in the handwriting board 100 is removed, so that the handwriting board 100 presents a paper-like shape and is thinner. This design also makes the handwriting board 100 lighter and easier to carry, and the user can use it anytime and anywhere, for example, as a bookmark. At the same time, the stylus 200 adopts a detachable design, which is convenient for replacement and maintenance.

[0029] It should be noted here that the setting of the erase control button 230 allows the user to choose global erase or local erase to meet different usage scenarios; of course, the erase control button 230 is not limited to one. When only one erase control button 230 is set, global erase or local erase can be selected by pressing the erase control button 230 several times. When at least two erase control buttons 230 are set, different erase control buttons 230 can be set with different erase functions.

[0030] It should be noted that, in the embodiment of the present invention, the thickness of the bistable cholesteric liquid crystal display panel 120 is 0.2 mm-2 mm.

[0031] See also Figure 1 and Figure 2 In the embodiment of the utility model, the erasing drive structure 220 is fixed to the upper rod section 211, the second electrical connection connector 240 is provided at the upper end of the upper rod section 211, and the lower end of the lower rod section 212 is formed with a pen tip structure 2121. In this way, when the stylus 200 is disassembled, the erasing drive structure 220 can be taken out together with the upper rod, so that the erasing drive structure 220 is exposed, so that maintenance personnel can more easily access this key component, which is convenient for maintenance.

[0032] See also Figure 2 In an embodiment of the utility model, the erase drive structure 220 includes a PCB board 221 and a battery 222. The PCB board 221 is fixed to the upper rod section 211 and is provided with an erase circuit for generating an erase voltage. It is also electrically connected to the second electrical connection connector 240. The battery 222 is electrically connected to the PCB board 221 and is fixed to the PCB board 221.

[0033] Based on this, during the assembly process, the PCB board 221 and the battery 222 may be assembled into an integrated structure first, and then the PCB board 221 and the battery 222 may be assembled as a whole to the upper rod section 211 .

[0034] Furthermore, the PCB board 221 is detachably connected to the battery 222, so that the battery 222 can be replaced when the power is exhausted.

[0035] In the embodiment of the utility model, the pen tip structure 2121 is detachably connected to the lower rod section 212 .

[0036] During frequent use, the pen tip structure 2121 often becomes the most easily damaged part. The pen tip structure 2121 is detachably connected to the lower rod section 212 so that the pen tip structure 2121 can be easily replaced when it is damaged.

[0037] See also Figure 2 In the embodiment of the utility model, the upper rod section 211 forms a cylindrical clamping portion 2111 , and the clamping portion 2111 can penetrate into the lower rod section 212 and be clamped and matched with the lower rod section 212 .

[0038] Based on this, during the assembly process, the upper rod section 211 and the lower rod section 212 can be snapped together by applying appropriate forces in opposite directions. When disassembly is required, the snapping fit between the upper rod section 211 and the lower rod section 212 can be easily released by applying forces in opposite directions.

[0039] Specifically, at least one clamping protrusion is provided on the outer periphery of the clamping portion 2111;

[0040] At least one locking groove is provided in the lower rod section 212, and each locking groove is provided corresponding to a locking protrusion.

[0041] Based on this, the structure is simple and has high structural reliability, which is conducive to reducing production costs and improving product durability.

[0042] In other embodiments of the present invention, the upper rod segment 211 and the lower rod segment 212 may be threadedly coupled.

[0043] Based on this, during the assembly process, the upper rod section 211 and the lower rod section 212 can be snapped together by applying appropriate forces in opposite directions. When disassembly is required, the snapping fit between the upper rod section 211 and the lower rod section 212 can be easily released by applying forces in opposite directions.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A locally erasable bistable cholesteric liquid crystal writing device, It is characterized in that Includes tablet and stylus; The handwriting board includes a first electrical connection connector and a bendable bistable cholesteric liquid crystal display panel; The stylus comprises a pen housing, an erasing drive structure, an erasing control button and a second electrical connection connector. The pen housing is arranged in a rod shape and is divided into an upper rod section and a lower rod section which are detachably connected and arranged up and down. The erasing drive structure is arranged in the pen housing and can be electrically connected to each other when the second electrical connection connector and the first electrical connection connector are docked, and apply an erasing voltage to the bistable cholesteric liquid crystal display panel. The erasing control button is arranged in the pen housing, and is used to control the erasing drive structure to apply a global erasing voltage or a local erasing voltage to the bistable cholesteric liquid crystal display panel.

2. The partially erasable bistable cholesteric liquid crystal writing device as claimed in claim 1, It is characterized in that The erasing drive structure is fixed to the upper rod section, the second electrical connection connector is arranged at the upper end of the upper rod section, and a pen tip structure is formed at the lower end of the lower rod section.

3. The partially erasable bistable cholesteric liquid crystal writing device as claimed in claim 2, It is characterized in that The erasing drive structure includes a PCB board and a battery. The PCB board is fixed to the upper rod section and is provided with an erasing circuit for generating an erasing voltage. The PCB board is also electrically connected to the second electrical connection connector. The battery is electrically connected to the PCB board and is fixed to the PCB board.

4. The partially erasable bistable cholesteric liquid crystal writing device as claimed in claim 3, It is characterized in that The PCB board is detachably connected to the battery.

5. The partially erasable bistable cholesteric liquid crystal writing device as claimed in claim 2, It is characterized in that The pen tip structure is detachably connected to the lower rod section.

6. The partially erasable bistable cholesteric liquid crystal writing device as claimed in claim 1, It is characterized in that The upper rod section forms a cylindrical clamping portion, and the clamping portion can penetrate into the lower rod section and be clamped and matched with the lower rod section.

7. The partially erasable bistable cholesteric liquid crystal writing device as claimed in claim 6, It is characterized in that At least one clamping protrusion is provided on the outer periphery of the clamping portion; At least one clamping groove is arranged in the lower rod section, and each clamping groove is arranged corresponding to one clamping protrusion.

8. The partially erasable bistable cholesteric liquid crystal writing device as claimed in claim 1, It is characterized in that The upper rod section and the lower rod section are threadedly matched.

9. The partially erasable bistable cholesteric liquid crystal writing device as claimed in claim 1, It is characterized in that The thickness of the bistable cholesteric liquid crystal display panel is 0.2 mm-2 mm.

10. The partially erasable bistable cholesteric liquid crystal writing device according to claim 1, It is characterized in that The bistable cholesteric liquid crystal display panel is a semi-transparent bistable cholesteric liquid crystal display panel or a semi-transparent color body bistable cholesteric liquid crystal display panel.

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