CN215987265U - Electronic writing device with local erasing function - Google Patents

Abstract

The application provides an electronic writing device with a local erasing function, which belongs to the technical field of liquid crystal writing and at least comprises a touch control assembly and a control assembly; the touch control assembly at least comprises a first base layer, a first conducting layer, a liquid crystal layer, a second conducting layer and a second base layer which are sequentially stacked; the first conducting layer comprises a plurality of mutually independent first electrodes, the second conducting layer comprises a plurality of mutually independent second electrodes, any one first electrode is partially opposite to at least one second electrode, and the first electrodes and the second electrodes can be electrified and generate voltage difference in opposite areas of the first electrodes and the second electrodes; the control assembly is electrically connected with the first electrode and the second electrode respectively; under the condition that a voltage difference is generated between opposite areas of the first electrode and the second electrode, the liquid crystal between the opposite areas is in a transmission state. The electronic writing device aims to solve the technical problem that the electronic writing device with the local erasing function in the prior art cannot realize local erasing.

Description

Electronic writing device with local erasing function

Technical Field

The application belongs to the technical field of liquid crystal writing, and particularly relates to an electronic writing device with a local erasing function.

Background

The liquid crystal writing board is a display device which adopts the liquid crystal optical display technology, displays characters, patterns and figures by pressure induction and has the characteristic of repeated erasing and writing. Generally used for learning education, meeting discussion events, etc.

The existing erasing mode of the liquid crystal handwriting board can only erase all written contents on the whole liquid crystal handwriting board, cannot meet the requirements of users, and particularly, when the contents with errors are erased, the contents which do not need to be erased are completely erased, so that the liquid crystal handwriting board is extremely inconvenient to use.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide an electronic writing device with a local erasing function, and aims to solve the technical problem that the electronic writing device in the prior art cannot realize local erasing.

The electronic writing device with the local erasing function at least comprises a touch control component and a control component, wherein the touch control component is used for receiving pressure information and displaying image information, and the touch control component at least has a local erasing state; the touch control assembly at least comprises a first base layer, a first conducting layer, a liquid crystal layer, a second conducting layer and a second base layer which are sequentially stacked, wherein the liquid crystal layer at least comprises liquid crystal; the first conducting layer comprises a plurality of mutually independent first electrodes, the second conducting layer comprises a plurality of mutually independent second electrodes, the widths of the first electrodes and the second electrodes are respectively 3mm-6mm, any one first electrode is partially opposite to at least one second electrode, and the first electrodes and the second electrodes can be electrified and generate voltage difference in opposite areas of the first electrodes and the second electrodes; the control assembly is respectively electrically connected with the first electrode and the second electrode and is used for inputting voltage to the first electrode and the second electrode; when a voltage difference is generated in opposite regions of the first electrode and the second electrode, the liquid crystal layer located between the opposite regions is in the local erasing state, and the liquid crystal layer in the local erasing state means that the liquid crystal is in a transmission state.

Preferably, the plurality of first electrodes are arranged in parallel at intervals, the plurality of second electrodes are arranged in parallel at intervals, and the projection of the first electrodes on the surface where the second electrodes are arranged forms an included angle a with the second electrodes.

Preferably, the included angle a is 0-90 °.

Preferably, the included angle a is 90 °.

Preferably, the distance between the adjacent first electrodes is 0.02mm-1 mm; the distance between the adjacent second electrodes is 0.02mm-1 mm.

Preferably, the distance between the adjacent first electrodes is 0.05 mm; the distance between the adjacent second electrodes is 0.05 mm.

Preferably, the first base layer is a transparent substrate, the second base layer is a colored substrate, and the liquid crystal layer is a bistable cholesteric liquid crystal film.

Preferably, the touch control assembly further includes a first connecting member, the first connecting member is located between the first conductive layer and the second conductive layer and is connected to the first conductive layer and the second conductive layer respectively; the first connecting member is annular and is sleeved and connected outside the liquid crystal layer.

Preferably, the first connecting member is a rubber frame prepared by rubber.

Preferably, the touch control assembly further comprises a second connecting structure member, the second connecting structure member is located between the first base layer and the second base layer and is respectively connected with the first base layer and the second base layer; the second connecting structural part is annular and is sleeved and connected with the first conducting layer and the second conducting layer.

Preferably, the second connecting structural member is a rubber frame prepared from rubber.

Preferably, the electronic writing device with the local erasing function further comprises a state switching control key; the state switching control key is used for outputting a state instruction, and the state instruction at least comprises a local erasing state instruction; the control assembly is electrically connected with the state switching control key and the touch assembly respectively; the state switching control key at least comprises a local erasing key, and the local erasing key is used for controlling the touch control assembly to be in the local erasing state through the control assembly.

Preferably, the touch control assembly further has an input state, the state instruction further includes an input state instruction, and the control assembly is configured to control the touch control assembly to enter the input state according to the input state instruction; when the touch control assembly is in the input state, the touch control assembly acquires the pressure information; the touch control assembly displays corresponding image information according to the pressure information, generates corresponding coordinate information, and transmits the image information and the generated corresponding coordinate information to the control assembly, and the control assembly is used for storing the image information and the generated corresponding coordinate information; when the touch control assembly is in the local erasing state, the control assembly acquires the pressure information, determines target coordinate information according to the pressure information, determines target image information according to the target coordinate information, and outputs screen clearing voltage to the touch control assembly according to the target coordinate information so that the liquid crystal corresponding to the target coordinate information is in a transmission state to clear the target image information.

Preferably, the touch control assembly further has a full clear state, the state switching control key further includes a full clear instruction, and the control assembly controls the touch control assembly to enter the full clear state according to the full clear instruction; when the touch control assembly is in the full clearing state, the control assembly outputs a screen clearing voltage to the touch control assembly, so that all liquid crystals in the liquid crystal layer are in a transmission state, and all image information on the touch control assembly is cleared.

Preferably, the electronic writing device with the local erasing function further comprises a display storage terminal electrically connected with the control component, and the control component can transmit the image information to the display storage terminal for displaying.

Preferably, the state switching control key at least comprises an input key and a local clear key, the input key is used for controlling the touch control assembly to be in the input state through the control assembly, and the local clear key is used for controlling the touch control assembly to be in the local erasing state through the control assembly; the state switching control key can also comprise a complete clearing key, and the complete clearing key is used for controlling the touch control assembly to be in a complete clearing state through the control assembly; the state switching control key can also comprise a signal transmission key, and the signal transmission key is used for transmitting the image information to the display storage terminal for display.

Preferably, the control component includes a storage module and a control module, the storage module is configured to store the image information and the corresponding coordinate information, and the control module is configured to control the touch component to be in the input state or in the local erasing state, and is capable of outputting a screen clearing voltage to the touch component.

Preferably, the control assembly further comprises a signal transmission module electrically connected with the control module, wherein the control module can transmit the image information through the signal transmission module.

Preferably, the signal transmission module includes a wired transmission module and/or a wireless transmission module.

Compared with the prior art, the beneficial effects of the application are that: compared with the prior art, the electronic writing device with the local erasing function can generate voltage difference in the opposite areas of the first electrode and the second electrode, and liquid crystal located between the opposite areas is turned to a transmission state through the voltage difference, namely, display information of the opposite areas of the first electrode and the second electrode is erased, namely the display information on the touch control assembly can be identified and erased through pressure induction, so that the writing device can realize the local erasing function and is convenient and fast to use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application or the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a cross-sectional view of an electronic writing device with a partial erase function according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of the touch device of FIG. 1;

fig. 3 is a schematic diagram of a coordinate structure of a conductive layer in an electronic writing device with a partial erasing function according to an embodiment of the present application;

FIG. 4 is a schematic diagram of an electronic writing device with a partial erase function according to an embodiment of the present application;

FIG. 5 is a diagram illustrating an operation state of an electronic writing apparatus with a partial erase function in an input state I according to an embodiment of the present application;

FIG. 6 is a diagram illustrating an operation state of an electronic writing apparatus with a partial erase function in an input state II according to an embodiment of the present application;

FIG. 7 is a diagram illustrating an operation state of an electronic writing device with a partial erase function in a fully erased state according to an embodiment of the present application;

fig. 8 is an operation state diagram of an electronic writing device with a partial erasing function in a partial erasing state according to an embodiment of the present application.

Description of reference numerals: 1. a touch control component; 11. a first base layer; 12. a first conductive layer; 13. a liquid crystal layer; 14. a second conductive layer; 15. a second base layer; 16. a first connecting member; 17. a second connecting structural member; 2. and a control component.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "upward," "vertical," "horizontal," "bottom," "inner," "outer," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present application.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments.

Referring to fig. 1-3 and fig. 8, an object of the present invention is to provide an electronic writing device with a local erasing function, which at least includes a touch device 1 and a control device 2, wherein the touch device 1 is used for receiving pressure information and displaying image information, and the touch device 1 at least has a local erasing state; the touch control assembly 1 at least comprises a first base layer 11, a first conductive layer 12, a liquid crystal layer 13, a second conductive layer 14 and a second base layer 15 which are sequentially stacked, wherein the liquid crystal layer 13 at least comprises liquid crystal; the first conducting layer 12 comprises a plurality of mutually independent first electrodes, the second conducting layer 14 comprises a plurality of mutually independent second electrodes, the widths of the first electrodes and the widths of the second electrodes are respectively 3mm-6mm, any first electrode is partially opposite to at least one second electrode, and the first electrodes and the second electrodes can be electrified with voltage and generate voltage difference in opposite areas of the first electrodes and the second electrodes; the control component 2 is respectively electrically connected with the first electrode and the second electrode and is used for inputting voltage to the first electrode and the second electrode; when a voltage difference is generated in the facing areas of the first electrode and the second electrode, the liquid crystal layer 13 located between the facing areas is in a local erasing state, and the liquid crystal layer 13 in the local erasing state means that the liquid crystal is in a transmission state, that is, the touch control assembly 1 is in the local erasing state. In general, the voltage difference needs to be more than 100 volts to ensure the erasing effect, and in this embodiment, the voltage difference is preferably 110 volts.

The working principle of the electronic writing device with the local erasing function is as follows: firstly, in an input state, handwriting input and display are carried out, a part participating in work is a touch assembly 1, pressure is generated on the touch assembly 1 by handwriting (namely the touch assembly 1 receives pressure information), the liquid crystal layer 13 is influenced by the pressure, the liquid crystal arrangement changes and correspondingly displays relevant handwriting (a track formed by the input information), the first base layer 11 is a transparent base material, the second base layer 15 is a colored base material, the liquid crystal layer 13 is a bistable cholesteric liquid crystal film, the bistable cholesteric liquid crystal film adopts a cholesteric liquid crystal mixture, and the bistable states of cholesteric liquid crystal are a reflection state (a p state) and a transmission state (an fc state) respectively; in the initial state (when writing is not performed), the cholesteric liquid crystal is in an fc state transmission state, and light is absorbed in the second base layer 15 through the first base layer 11 and the bistable cholesteric liquid crystal film; when the pressure is applied, the liquid crystal layer 13 is subjected to pressure arrangement change, the liquid crystal arrangement of the corresponding track position is changed from an fc state to a reflection state under the pressure, and the liquid crystal layer 13 with p-state arrangement reflects different colors according to different screw pitches of cholesteric phases; the control component 2 is electrically connected with the first conductive layer 12 and the second conductive layer 14 respectively, when erasing work, the control component 2 can drive the circuit to generate a high voltage, the p-state cholesteric liquid crystal arranged in the reflective state is influenced by the voltage and is arranged and recovered to the fc state, the p-state cholesteric liquid crystal is used for erasing the track of the liquid crystal layer 13 recorded by the pressure and is recovered to the transmission state, and therefore the color of the second base layer 15 is displayed.

In this embodiment, the first conductive layer 12 and the second conductive layer 14 are respectively located on both sides of the liquid crystal layer 13, and the first base layer 11, the first conductive layer 12, the liquid crystal layer 13, the second conductive layer 14, and the second base layer 15 are sequentially stacked; the first base layer 11 is used for receiving pressure (pressure information) generated by writing, and the second base layer 15 is used for supporting and forming an external structure of the touch control assembly 1 together with the first base layer 11. The first conductive layer 12 comprises a plurality of mutually independent first electrodes which are insulated, the second conductive layer 14 comprises a plurality of mutually independent second electrodes which are insulated, the first electrodes and the second electrodes are led out through a circuit board and are connected with the control component 2, the widths of the first electrodes and the second electrodes are respectively 3mm-6mm, any first electrode is opposite to at least one second electrode, the opposite parts of the first electrodes and the second electrodes form opposite regions, partial liquid crystal of the liquid crystal layer 13 is positioned between the opposite regions, so that the first electrodes and the second electrodes form a plurality of cross points which are distributed in a cross way to form a capacitance matrix, when a finger or other conductive materials touch the first base layer 11, the change of capacitance at the touch position can be detected through x and y scanning, and the position coordinate of the finger can be calculated, the position is identified by xy coordinates, which are stored to the control unit 2, as shown in fig. 3.

Specifically, as shown in fig. 2, the first base layer 11 is a supporting substrate of the first conductive layer 12, the second base layer 15 is a supporting substrate of the second conductive layer 14, and the first conductive layer 12 and the second conductive layer 14 cooperate to collect an input signal and receive a screen clearing voltage in a time-sharing manner; the specific use process is that firstly, for signal acquisition, as shown in fig. 5, the first electrode and the second electrode form an induction electrode of the touch control assembly 1, when a finger or other conductive materials contact the induction electrode, the capacitance value between the first conductive layer 12 and the second conductive layer 14 is changed, and a related capacitance value change signal (position coordinate signal) is transmitted to the control assembly 2 for storage; then, when performing local erasing, the first base layer 11 receives erasing pressure (pressure information), the control component 2 outputs a screen clearing voltage to the corresponding first electrode and second electrode according to the position coordinate corresponding to the erasing pressure, as shown in fig. 8, the first electrode and the second electrode form an electrode of the liquid crystal layer 13, the liquid crystal layer 13 may be a liquid crystal display, the first conductive layer 12 and the second conductive layer 14 directly receive an electric signal output by the control component 2 to form a high voltage field which affects display of the liquid crystal layer 13, the high voltage field is only generated in the position coordinate area covered by the erasing pressure, and the liquid crystal in the position coordinate area is affected.

Furthermore, the first electrodes and the second electrodes are arranged in a mode that a plurality of first electrodes are arranged in parallel at intervals, a plurality of second electrodes are arranged in parallel at intervals, and the projection of the first electrodes on the surface where the second electrodes are located and the second electrodes form an included angle a; the included angle a is 0-90 degrees.

Specifically, the included angle a is 90 °, as shown in fig. 3, the first electrode is a strip electrode in the x direction, the second electrode is a strip electrode in the y direction, the x direction is perpendicular to the y direction, and the strip electrodes are distributed in a crossed manner to form a capacitance matrix, when a finger or other conductive material touches the first base layer 11, the change of capacitance at a touch position can be detected through x and y scanning, and then the position coordinate of the finger is calculated; the specific working principle is that the projection type capacitive touch screen (the touch component 1) works, and the related operation can be realized through an integrated touch chip in the control component 2. The storage function is selectively activated through a storage key, the storage key is a key switch arranged on the control component 2, and the first electrode and the second electrode transmit position coordinates to a storage module in the control component 2 after the position coordinates are collected.

In a local erasing state, the first electrode and the second electrode are crossed to form an xy matrix, the xy matrix works in a time-sharing mode, and when a signal time sequence (input state) is collected, the xy matrix is an xy induction sensor of the touch control assembly 1 and recognizes an input xy coordinate through induction capacitance change; in the liquid crystal film erasing timing (local erasing state), the xy matrix is used as an erasing electrode of the liquid crystal layer 13, and correspondingly, xy crosses the corresponding area, high and low levels can be input through the first electrode and the second electrode, high voltage is formed at the xy crossing position, and the display content at the xy crossing position is erased.

The specific working process is that the local erasing function can be selectively activated through a local erasing key, step one, the touch control assembly 1 is in a capacitance signal acquisition working mode, the first electrode and the second electrode are strip-shaped electrodes in the x direction and the y direction respectively, the x direction and the y direction are vertical and are distributed in a crossed mode to form a capacitance matrix, when a finger or other conductive materials touch a screen, the change of capacitance at a touch position can be detected through scanning of x and y, and then the position coordinate of the finger is calculated; step two, the device is in an erasing mode of the liquid crystal layer 13, the control component 2 interrupts the coordinate acquisition function after receiving the position coordinate signal, the coordinate acquisition function is switched to x and y electrodes, different high and low level signals are output according to the acquired coordinates, high voltage is formed at the crossing position of the first electrode and the second electrode corresponding to the coordinates, the track of the liquid crystal layer 13 at the crossing position is erased, the liquid crystal layer 13 is a bistable polymerization cholesteric liquid crystal layer 13 and has two stable arrangement states of a fc state and a p state, wherein the fc state liquid crystal layer 13 is in a transmission state, the first base layer 11 is a transparent base material, the first electrode and the second electrode are transparent electrodes, and the liquid crystal layer 13 displays the color base material color of the second base layer 15; the p state is a reflection state, and different colors can be displayed by reflecting according to the pitch of cholesteric liquid crystal of the liquid crystal layer 13 and reflecting different wavelength relations through the transparent base material of the first base layer 11, the transparent electrodes of the first electrode and the second electrode and forming reflection on the liquid crystal layer 13; the fc state arrangement can be changed into p state arrangement display handwriting under the influence of pressure, and the p state arrangement can be changed into fc state arrangement erasing traces under the influence of high voltage; and step three, repeating the step one and the step two, and sequentially erasing the contents needing to be locally erased according to the coordinates.

This electron writing device with local erase function can make first electrode and second electrode produce the voltage difference at the just regional of first electrode and second electrode, makes the liquid crystal that is located between just to the region overturn to the transmission state through the voltage difference, promptly for the just regional display information of first electrode and second electrode is erased, and the display information on touch-control subassembly 1 can be discerned through pressure induction and erased promptly, so this writing device can realize the function of local erase, and it is convenient to use. In addition, the smaller the width of the electrode is, the smaller the area of the facing area of the first electrode and the second electrode is, and thus the higher the erasing precision is, and in the case of considering the manufacturing cost and the writing width together, the width of the first electrode and the second electrode is designed to be 3mm to 6mm, preferably 5mm in the present embodiment.

In one embodiment, the distance between the adjacent first electrodes is 0.02mm to 1mm, and specifically, the distance between the adjacent first electrodes may be selected to be 0.05 mm; the distance between the adjacent second electrodes is 0.02mm-1mm, and specifically, the distance between the adjacent second electrodes can be selected to be 0.05 mm.

In the present embodiment, the smaller the gap between the adjacent electrodes is, the better the display effect of the touch device 1 is, and the better the erasing effect is, and generally, when the ratio of the width of the first electrode to the gap between the first electrodes reaches a certain value, the influence of the gap on the erasing or the displaying can be ignored, for example, when the width of the first electrode is 30 times or more of the gap between the first electrodes, it can be considered that the gap has no influence on the displaying, and therefore, when the manufacturing cost is considered comprehensively, the distance between the adjacent first electrodes and the distance between the adjacent second electrodes are set to 0.05 mm.

In one embodiment, referring to fig. 2, the touch assembly 1 further includes a first connecting member 16, wherein the first connecting member 16 is located between the first conductive layer 12 and the second conductive layer 14 and is respectively connected to the first conductive layer 12 and the second conductive layer 14; the first connecting member 16 is annular and is sleeved and connected to the outside of the liquid crystal layer 13; the first connecting member 16 may employ a rubber frame prepared by using rubber.

Specifically, the first conductive layer 12 further includes a first panel to which a plurality of first electrodes are connected; the second conductive layer 14 further includes a second panel to which a plurality of second electrodes are connected; an annular connecting area is arranged at the periphery of the first panel plate surface outside the first electrode, and similarly, an annular connecting area is arranged at the periphery of the second panel plate surface outside the second electrode, wherein the connecting area is an area where the first connecting component 16 is respectively connected with the first conductive layer 12 and the second conductive layer 14; when the first conductive layer 12 and the second conductive layer 14 are connected, the first panel and the second panel are opposite to each other, the first electrode and the second electrode are positioned between the first panel and the second panel, the liquid crystal layer 13 is arranged between the first electrode and the second electrode, and the connection areas of the first panel and the second panel are opposite to each other; then, coating colloid on the positions of the two connecting areas, sealing and fixing the first panel and the second panel, and forming a colloid frame after the colloid is solidified and formed, namely forming a first connecting component 16; in addition, when the glue is applied, the glue can seal the periphery of the liquid crystal layer 13 at the same time, and the liquid crystal layer 13 is connected with the first conductive layer 12 and the second conductive layer 14 through a glue frame to form a sealing module.

In this embodiment, the first conductive layer 12, the second conductive layer 14 and the liquid crystal layer 13 are connected into a whole through the colloid, so that the connection between the first conductive layer and the liquid crystal layer is firmer and more reliable, the integrity is stronger, the stability of the whole structure is favorably improved, meanwhile, the stability of the liquid crystal layer 13 can also be improved, the display effect is ensured, and the service life of the touch control assembly 1 is prolonged.

In one embodiment, referring to fig. 2, the touch assembly 1 further includes a second connecting structure member 17, wherein the second connecting structure member 17 is located between the first substrate 11 and the second substrate 15 and is connected to the first substrate 11 and the second substrate 15 respectively; the second connecting structure 17 is annular and is sleeved and connected to the outside of the first conductive layer 12 and the second conductive layer 14.

In this embodiment, an annular mounting region is provided along the periphery of the board surface on the surface of the first base layer 11 close to the first conductive layer 12, an annular mounting region is correspondingly provided along the periphery of the board surface on the surface of the second base layer 15 close to the second conductive layer 14, and the first conductive layer 12, the second conductive layer 14 and the liquid crystal layer 13 are all located in the annular middle part surrounded by the annular regions; the mounting region is a region where the second connection structural member 17 is connected to the first base layer 11 and the second base layer 15, respectively; when the first base layer 11 and the second base layer 15 are connected, first, the first base layer 11 and the second base layer 15 are opposed to each other, and the first conductive layer 12, the second conductive layer 14, and the liquid crystal layer 13 are located between the first base layer 11 and the second base layer 15, so that the mounting regions of the first base layer 11 and the second base layer 15 are opposed to each other; then, coating glue bodies at the positions of the two mounting areas, sealing and fixing the first base layer 11 and the second base layer 15, and forming a glue frame after the glue bodies are solidified and formed, namely forming a second connecting structural member 17; in addition, when the glue is coated, the glue can simultaneously seal the periphery of the module composed of the first conductive layer 12, the second conductive layer 14 and the liquid crystal layer 13, and the module composed of the first conductive layer 12, the second conductive layer 14 and the liquid crystal layer 13 is connected with the first base layer 11 and the second base layer 15 through the glue frame to form a sealed module.

In this embodiment, the first base layer 11, the second base layer 15, the first conductive layer 12, the second conductive layer 14 and the liquid crystal layer 13 are connected into a whole through the colloid, so that the whole connection is firmer and more reliable, the integrity is stronger, the stability of the whole structure is favorably improved, meanwhile, the stability of the liquid crystal layer 13 can be improved, the display effect is ensured, and the service life of the touch control assembly 1 is prolonged.

In one embodiment, the electronic writing device with partial erasing function further comprises a state switching control key; the state switching control key is used for outputting a state instruction, and the state instruction at least comprises a local erasing state instruction; the control component 2 is respectively electrically connected with the state switching control key and the touch component 1; the state switching control keys at least comprise a local erasing key, the local erasing key is used for outputting a local erasing state instruction, and the control component 2 is used for controlling the touch component 1 to enter a local erasing state according to the local erasing state instruction.

Further, referring to fig. 5, the touch device 1 further has an input state, the state switching control key further includes an input control key, the state command further includes an input state command, the input control key is used for outputting the input state command, and the control device 2 is used for controlling the touch device 1 to enter the input state according to the input state command and controlling the touch device 1 to enter the local erasing state according to the local erasing state command.

The specific working process is that when the touch control assembly 1 is in an input state, the touch control assembly 1 acquires pressure information and transmits the pressure information to the control assembly 2, and the control assembly 2 is used for acquiring the pressure information; the touch control assembly 1 displays corresponding image information according to the pressure information and generates corresponding coordinate information, wherein the coordinate information is obtained by detecting the change of capacitance between the first electrode and the second electrode through x and y scanning when the first base layer 11 is touched, and further calculating the position coordinate of the finger; the control component 2 is used for storing the image information and the generated corresponding coordinate information, wherein the image information is generated in the liquid crystal layer 13, the cholesteric liquid crystal in the liquid crystal layer 13 is changed from a transmission state to a reflection state after the liquid crystal layer 13 receives pressure, and the liquid crystal layer 13 arranged in the reflection state reflects different colors according to different thread pitches of the cholesteric phase so as to present the image information; when the touch component 1 is in a local erasing state, the control component 2 acquires pressure information, determines target coordinate information according to the pressure information, determines target image information according to the target coordinate information, outputs a screen clearing voltage to the touch component 1 according to the target coordinate information, the voltage acts on the first electrode and the second electrode, the cholesteric liquid crystals arranged in the reflective state are influenced by the voltage and are arranged and restored to an fc state, namely, a transmission state, so that the color of the second base layer 15 is displayed, and the color is used for erasing a track of the liquid crystal layer 13 recorded by the pressure so as to erase the target image information.

Further, referring to fig. 7, the touch device 1 further has a full erase state, the state switching control key further includes a full erase key, the state command further includes a full erase command, and the control device 2 controls the touch device 1 to enter the full erase state according to the full erase command; when the touch component 1 is in the full-erasing state, the control component 2 outputs the screen clearing voltage to the touch component 1, that is, the control component 2 outputs the screen clearing voltage to all the first electrodes and all the second electrodes, so that all liquid crystals in the liquid crystal layer 13 are turned over to the transmission state, and the purpose of erasing the image information on the touch component 1 is achieved.

Further, as shown in fig. 4 and 6, the state switching control key further includes a transmission key, the state command further includes a transmission command, and the control component 2 outputs the image information stored in the control component 2 to the outside according to the transmission command.

In one embodiment, referring to fig. 4 and 6, the control assembly 2 further includes a control module and a transmission module electrically connected to the control module, wherein the control module is configured to receive the status command and control the touch assembly 1 to be in different statuses, and is configured to output a voltage to the touch assembly 1, and the transmission module is configured to output image information stored in the storage module to the outside according to the transmission command; the electronic writing device with the local erasing function further comprises a display storage terminal electrically connected with the control module, and the control module is used for outputting the image information of the storage module to the display storage terminal through the transmission module and displaying the image information; the display storage terminal can be a television with a display screen, a mobile phone or a computer.

In this embodiment, this device still has the function of throwing the screen, through the transmission module, can outwards transmit the image information that storage module stored, be connected with the transmission module electricity through showing storage terminal, can throw the screen display to showing storage terminal with the image information transmission in the storage module, so this device supplies the part that the user watched for showing storage terminal, and not touch-control subassembly 1, show storage terminal can be for having the TV of display screen, cell-phone or computer, the function is more various, application scope is wider, it is more convenient to use, be favorable to improving user's experience and feel.

In summary, the touch device 1 has functions of 1), and the touch device 1 is configured to collect handwriting input content (pressure signal) and convert the input content into a data signal to be transmitted to the control device 2, specifically, to be transmitted to the storage module, where the data signal includes the input content and corresponding coordinate information; 2) the touch control component 1 displays the handwriting input content through a pressure induction principle; 3) the touch control component 1 receives the data signal of the control component 2 and realizes local erasing through subarea erasing. The control component 2 is used for processing input information (input signals) of the touch component 1 and storing and processing input contents according to requirements; wherein the data to be stored are stored in a storage module of the control assembly 2; the control component 2 obtains pressure information, determines target coordinate information according to the pressure information, determines target image information according to the target coordinate information, outputs voltage to the first electrode and the second electrode in the touch component 1 according to the target coordinate information, the voltage acts on the first electrode and the second electrode, cholesteric liquid crystals arranged in a reflective state are influenced by the voltage and are arranged and restored to an fc state, namely, a transmission state, so that the color of the second base layer 15 is displayed, and the color is used for erasing a track of the liquid crystal layer 13 recorded by the pressure to erase the target image information.

In one embodiment, referring to fig. 4, the transmission module includes a wired transmission module, or includes a wireless transmission module, or includes both a wired transmission module and a wireless transmission module; the wired transmission can adopt USB wired connection, and the wireless transmission can adopt Bluetooth or WiFi wireless connection.

In the embodiment, the transmission function is selected and activated through the transmission key and is transmitted to the display storage terminal through a USB wired connection or a Bluetooth/WiFi wireless connection. The transmission module has more diverse design, can be selected according to actual use conditions, and is powerful in function and more humanized.

The foregoing is considered as illustrative only of the preferred embodiments of the invention, and is presented merely for purposes of illustration and description of the principles of the invention and is not intended to limit the scope of the invention in any way. Any modifications, equivalents and improvements made within the spirit and principles of the present application and other embodiments of the present application without the exercise of inventive faculty will occur to those skilled in the art and are intended to be included within the scope of the present application.

Claims (10)

1. An electronic writing device with a local erasing function is characterized by at least comprising a touch control component and a control component, wherein the touch control component is used for receiving pressure information and displaying image information, and the touch control component at least has a local erasing state;

the touch control assembly at least comprises a first base layer, a first conducting layer, a liquid crystal layer, a second conducting layer and a second base layer which are sequentially stacked, wherein the liquid crystal layer at least comprises liquid crystal;

the first conducting layer comprises a plurality of mutually independent first electrodes, the second conducting layer comprises a plurality of mutually independent second electrodes, the widths of the first electrodes and the second electrodes are respectively 3mm-6mm, any one first electrode is partially opposite to at least one second electrode, and the first electrodes and the second electrodes can be electrified and generate voltage difference in opposite areas of the first electrodes and the second electrodes;

the control assembly is respectively electrically connected with the first electrode and the second electrode and is used for inputting voltage to the first electrode and the second electrode;

when a voltage difference is generated in opposite regions of the first electrode and the second electrode, the liquid crystal layer located between the opposite regions is in the local erasing state, and the liquid crystal layer in the local erasing state means that the liquid crystal is in a transmission state.

2. The electronic writing device with local erasing function as claimed in claim 1, wherein a plurality of said first electrodes are arranged in parallel at intervals, a plurality of said second electrodes are arranged in parallel at intervals, and the projection of said first electrodes on the surface of said second electrodes is arranged at an angle a with said second electrodes.

3. An electronic writing instrument with a partial erasing function as claimed in claim 2, wherein said included angle a is 0 ° to 90 °.

4. An electronic writing instrument with a partial erasing function as claimed in claim 3, wherein said included angle a is 90 °.

5. An electronic writing instrument having a partial erasing function as claimed in claim 2, wherein a spacing between adjacent ones of said first electrodes is 0.02mm to 1 mm; the distance between the adjacent second electrodes is 0.02mm-1 mm.

6. The electronic writing instrument with a partial erasing function as claimed in claim 1, wherein said first base layer is a transparent substrate, said second base layer is a colored substrate, and said liquid crystal layer is a bistable cholesteric liquid crystal film.

7. The electronic writing device with local erasing function as claimed in any one of claims 1 to 6, wherein said touch-sensing assembly further comprises a first connecting member located between said first conductive layer and said second conductive layer and connected to said first conductive layer and said second conductive layer, respectively; the first connecting member is annular and is sleeved and connected outside the liquid crystal layer.

8. The electronic writing apparatus with partial erasing function as claimed in claim 7, wherein the touch assembly further comprises a second connecting structure located between the first substrate and the second substrate and connected to the first substrate and the second substrate, respectively; the second connecting structural part is annular and is sleeved and connected with the first conducting layer and the second conducting layer.

9. An electronic writing apparatus with a partial erasing function as claimed in any one of claims 1 to 6, wherein said electronic writing apparatus with a partial erasing function further comprises a state switching key; the state switching control key is used for outputting a state instruction, and the state instruction at least comprises a local erasing state instruction; the control assembly is electrically connected with the state switching control key and the touch assembly respectively; the state switching control key at least comprises a local erasing key, and the local erasing key is used for controlling the touch control assembly to be in the local erasing state through the control assembly.

10. An electronic writing device with local erasing function as claimed in any one of claims 1-6, characterized in that said electronic writing device with local erasing function further comprises a display storage terminal electrically connected with a control component, said control component can transmit said image information to said display storage terminal for display.

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