CN219162679U - Bistable liquid crystal writing input device - Google Patents
Bistable liquid crystal writing input device Download PDFInfo
- Publication number
- CN219162679U CN219162679U CN202222555869.5U CN202222555869U CN219162679U CN 219162679 U CN219162679 U CN 219162679U CN 202222555869 U CN202222555869 U CN 202222555869U CN 219162679 U CN219162679 U CN 219162679U
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- electromagnetic
- input device
- bistable liquid
- conductive layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Position Input By Displaying (AREA)
Abstract
The utility model discloses a bistable liquid crystal writing input device, which comprises: the first conductive layer, the bistable liquid crystal layer, the second conductive layer, the basal layer and the electromagnetic induction layer are sequentially arranged; wherein the first conductive layer and the second conductive layer are respectively divided into at least two mutually insulated conductive areas; the conductive areas of the first conductive layer are distributed along a first direction and are parallel to each other; the conductive areas of the second conductive layer are distributed along the second direction and are parallel to each other, and the first direction and the second direction are staggered in space. The bistable liquid crystal writing input device realizes positioning by utilizing electromagnetic induction between the electromagnetic pen and the electromagnetic induction plate, and the main control unit respectively applies set erasing voltages to corresponding conductive areas on the first conductive layer and the second conductive layer based on the positioning positions, so that the local erasing of the positioning positions can be realized.
Description
Technical Field
The utility model relates to the technical field of writing devices, in particular to a bistable liquid crystal writing input device.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Electromagnetic pressure-sensitive writing input devices of the prior art, such as: the digital board is usually composed of an electromagnetic induction board and an electromagnetic pen, and is connected with an external display device, such as a computer, when in use; when the electromagnetic pen writes on the electromagnetic induction plate, the writing content of the electromagnetic pen can be synchronously displayed on the display screen of the computer. For a scene inconvenient to control by using a mouse and a keyboard, people usually use a digital panel for input, for example, when art design is performed, the digital panel is used for hand painting, hand painting content is input to a computer for display, and then later processing can be performed by using computer design software and the like.
The digital board adopts an electromagnetic induction principle on hardware, and is completely completed through electromagnetic induction in the cursor positioning and moving process. The electromagnetic induction plate is provided with copper wires which are horizontally and vertically arranged in an equalizing mode, an equalizing crisscross magnetic field is generated above the plate surface, when the pen point of the electromagnetic pen moves on the digital plate, the pen point cuts the magnetic field, and therefore an electric signal is generated, and the position of the pen point can be accurately positioned.
However, the electromagnetic pressure-sensitive writing input device such as a digitizer tablet has a limited range of application because its input content can be displayed only in synchronization with an external display device and cannot be written on by itself. Although the prior art combines the liquid crystal display device with the digital panel to have a display function, the display function can be realized only in the power-on state, and the display can not be realized when power is lost; in addition, the display simulates writing, does not use pressure writing, and cannot restore the real writing feeling and writing effect.
Disclosure of Invention
In order to solve the above problems, the present utility model provides a bistable liquid crystal writing input device, which combines an electromagnetic pressure-sensitive writing input device with a bistable liquid crystal writing film, and uses the characteristic that the bistable liquid crystal writing film can realize writing display by pressure to realize the pressure writing display of the electromagnetic pressure-sensitive writing input device.
In some embodiments, the following technical scheme is adopted:
a bistable liquid crystal writing input device comprising: the first conductive layer, the bistable liquid crystal layer, the second conductive layer, the basal layer and the electromagnetic induction layer are sequentially arranged; wherein the first conductive layer and the second conductive layer are respectively divided into at least two mutually insulated conductive areas; the conductive areas of the first conductive layer are distributed along a first direction and are parallel to each other; the conductive areas of the second conductive layer are distributed along the second direction and are parallel to each other, and the first direction and the second direction are staggered in space.
As a further scheme, the method further comprises the following steps: the main control unit is connected with the electromagnetic induction layer.
As a further scheme, the method further comprises the following steps: and the storage unit is connected with the main control unit.
As a further scheme, the method further comprises the following steps: the bistable liquid crystal writing input device is communicated with the first display terminal through wires or wireless.
As a further scheme, the electromagnetic induction layer is an electromagnetic induction plate.
As a further scheme, the method further comprises the following steps: an active or passive electromagnetic pen capable of emitting electromagnetic signals of at least three frequencies; the electromagnetic signal of the first frequency corresponds to a writing state, the electromagnetic signal of the first frequency corresponds to a state that the pen point is suspended, and the electromagnetic signal of the third frequency corresponds to an erasing state.
As a further scheme, the one end that the electromagnetic pen is close to the writing nib is equipped with the button that erases, when the button that erases was pressed, electromagnetic pen can send the electromagnetic signal of third frequency.
As a further scheme, one end of the electromagnetic pen far away from the writing nib is provided with an erasing member, a micro switch is arranged in the erasing member, and when the erasing member is in contact with the writing input device, the micro switch can be triggered so that the electromagnetic pen can send out electromagnetic signals with a third frequency.
As a further aspect, the erasing member is a felt pad.
As a further aspect, the first conductive layer and the second conductive layer are each divided into at least two mutually insulated strip-shaped conductive regions; the first direction and the second direction are mutually perpendicular.
Compared with the prior art, the utility model has the beneficial effects that:
(1) The bistable liquid crystal writing input device can realize writing display by using pressure, fully restore real writing feeling and writing effect, and can normally display without applying power.
(2) The bistable liquid crystal writing input device realizes positioning by utilizing electromagnetic induction between an electromagnetic pen and an electromagnetic induction plate. In the local erasing state, the main control unit applies set erasing voltages to corresponding conductive areas on the first conductive layer and the second conductive layer based on the positioned positions, so that the local erasing of the positioned positions can be realized.
(3) The bistable liquid crystal writing input device has a storage function, can locate and store writing tracks, simultaneously communicates with a first display terminal, and can send written or stored contents to the first display terminal.
Additional features and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
FIG. 1 is a schematic diagram of a bistable liquid crystal writing input device according to an embodiment of the utility model;
FIG. 2 is a schematic diagram of the structure of the first conductive layer and the second conductive layer;
FIG. 3 is a schematic diagram of the overall structure of an electromagnetic pen according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of the internal structure of an electromagnetic pen according to an embodiment of the present utility model;
the touch screen comprises a first conductive layer, a bistable liquid crystal layer, a second conductive layer, a basal layer and an electromagnetic induction layer, wherein the first conductive layer, the bistable liquid crystal layer, the second conductive layer, the basal layer and the electromagnetic induction layer are arranged in sequence; 6. the erasing part, the first micro-switch, the supporting part, the electromagnetic pen control main board, the second micro-switch, the erasing key and the writing pen point are respectively arranged in sequence, wherein the erasing part, the first micro-switch, the supporting part, the electromagnetic pen control main board, the second micro-switch, the erasing key and the writing pen point are respectively arranged in sequence, and the erasing key is arranged in sequence.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Example 1
The bistable liquid crystal writing film works on the principle that writing contents on the liquid crystal writing film are erased by utilizing the bistable characteristic of liquid crystal. For example, a cholesteric liquid crystal is used as a writing film, and the writing pressure track of a writing pen is recorded by the pressure acted on the writing film, so that the corresponding writing content is displayed; the cholesteric liquid crystal structure is changed by applying an electric field, so that the writing pressure track on the liquid crystal writing board disappears to realize erasure.
Based on the above working principle, in one or more embodiments, a bistable liquid crystal writing input device is disclosed, and in combination with fig. 1, the bistable liquid crystal writing input device specifically includes: the first conductive layer 1, the bistable liquid crystal layer 2, the second conductive layer 3, the base layer 4 and the electromagnetic induction layer 5 are sequentially arranged. The first conductive layer can be a transparent PET film, and the second conductive layer can be a non-transparent PET black film.
Wherein the first conductive layer 1 and the second conductive layer 3 are each divided into at least two mutually insulated strip-shaped conductive areas; the strip-shaped conductive areas of the first conductive layer are distributed along a first direction and are parallel to each other; the strip-shaped conductive areas of the second conductive layer are distributed along the second direction and are parallel to each other, and the first direction and the second direction are staggered in space. As a specific embodiment, referring to fig. 2, the strip-shaped conductive areas of the first conductive layer are parallel distributed in a horizontal direction, and the strip-shaped conductive areas of the second conductive layer are parallel distributed in a vertical direction, so that the strip-shaped conductive areas of the first conductive layer are spatially perpendicular to the strip-shaped conductive areas of the second conductive layer. The set voltage is applied to different conductive areas on the two conductive layers, and the set areas on the bistable liquid crystal writing film can be erased locally by utilizing the voltage difference formed between the upper conductive layer and the lower conductive layer; the specific principles of implementing localized erasure will be known to those skilled in the art from the description of the prior art and will not be described in detail herein.
As an alternative embodiment, an insulating layer is provided between the first conductive layer 1 and the bistable liquid crystal layer 2 and/or between the second conductive layer 3 and the bistable liquid crystal layer 2. The insulation layer is added to better realize mutual insulation between the two conductive layers and the bistable liquid crystal layer, so that the bistable liquid crystal layer is protected to a certain extent, and the service life of the writing film is prolonged.
The bistable liquid crystal writing input device of the embodiment can form a bistable liquid crystal writing film based on the arrangement of the first conductive layer 1, the bistable liquid crystal layer 2 and the second conductive layer 3, so that writing can be realized through pressure, writing display can be realized under the condition of no power up, and meanwhile, the real writing feeling and writing effect can be fully restored; in addition, the device also has a local erasing function.
In this embodiment, the electromagnetic induction layer 5 is an electromagnetic induction plate, and the electromagnetic induction plate can receive electromagnetic signals sent by an electromagnetic pen; specifically, the electromagnetic induction plate can be selected from electromagnetic induction plates in the digital plate, copper wires which are arranged horizontally and vertically in an even mode are arranged on the electromagnetic induction plates, the electromagnetic induction plates are cut into a certain number of squares, an even criss-cross magnetic field is generated above the plate surfaces, when a pen point of an electromagnetic pen moves on the bistable liquid crystal writing input device, the magnetic field is cut, and therefore an electric signal is generated, and the position of the pen point or a pen tail erasing member can be accurately determined through multi-point positioning by the electromagnetic induction plates.
In this embodiment, the electromagnetic pen is also included corresponding to the electromagnetic induction plate, and the electromagnetic pen can be active (powered by a battery) or passive (powered by the electromagnetic induction plate).
The electromagnetic pen can emit electromagnetic signals with at least three frequencies; the electromagnetic signal of the first frequency corresponds to a writing state, the electromagnetic signal of the first frequency corresponds to a state that the writing pen point is suspended, and the electromagnetic signal of the third frequency corresponds to an erasing state.
Specifically, referring to fig. 3 and 4, an electromagnetic pen control main board is arranged inside the electromagnetic pen, a second micro switch 10 is arranged inside a writing nib of the electromagnetic pen, and the second micro switch 10 is connected with the electromagnetic pen control main board 9; the writing point 12 of the electromagnetic pen can emit electromagnetic signals with a first frequency when contacting the input device, and can emit electromagnetic signals with a second frequency when approaching but not contacting the input device, and the area through which the electromagnetic pen writes can be acquired by the electromagnetic induction plate. The above structure and principle are commonly implemented in the electromagnetic pen in the prior art, and will not be described in detail.
As a further embodiment, an erasing key 11 is arranged at a position close to the writing nib, and the erasing key 11 is also connected with a switch which is connected with the electromagnetic pen control main board 9; after the erasing key is pressed, the electromagnetic pen can send out electromagnetic signals with third frequency, and at the moment, the writing nib is close to but does not contact with the passing area of the device, and can be sensed and judged to be an erasing area to be erased.
As a further implementation mode, an erasing member 6 is arranged at one end of the electromagnetic pen far away from the writing nib, a first micro switch 7 is arranged in the erasing member, and the first micro switch is connected with an electromagnetic pen control main board 9 through a supporting member 8; when the erasing member is contacted with the writing input device, the first micro switch 7 can be triggered, and the electromagnetic pen sends out electromagnetic signals with third frequency, so that the erasing of the contact position of the erasing member is realized. In order to avoid writing marks when the erasing member contacts the writing input device, the erasing member of this embodiment is made of a flexible material, for example: felt pad.
In this embodiment, the bistable liquid crystal writing input device further includes a main control unit and a storage unit, where the main control unit is configured to receive a positioning position of the electromagnetic induction plate to the electromagnetic pen. The storage unit is used for recording and storing the writing track. Specifically, after the position of the pen point of the electromagnetic pen is sensed by the electromagnetic induction plate, signals are transmitted to the main control unit, and the main control unit records/stores the writing trace according to the positioning position. In addition, the erasing position of the erasing member on the bistable liquid crystal writing input device can be sensed by the electromagnetic induction plate, the position information is also transmitted to the main control unit, and the main control unit controls the corresponding conductive areas on the two conductive layers to apply different voltages according to the position information, so that the local erasing of the areas is realized.
The main control unit can determine whether to execute the erasing action according to the difference of the electromagnetic signal frequencies.
As an alternative embodiment, the bistable liquid crystal writing input device may communicate with the first display terminal by wired or wireless means. The content written by the bistable liquid crystal writing input device can be transmitted to the first display terminal in real time for display. Such as: the structure can be suitable for taking the bistable liquid crystal writing input device as a student end, taking the first display terminal as a teacher end, and transmitting the writing content of the student end to the teacher end so as to facilitate a teacher to know the answering situation of the student; or the content written by the bistable liquid crystal writing input device is displayed on the first display terminal like a digital tablet, and then the written content is processed by other software.
The writing in this embodiment includes writing, drawing, and other various forms of content.
While the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the utility model, but rather, it is intended to cover all modifications or variations within the scope of the utility model as defined by the claims of the present utility model.
Claims (10)
1. A bistable liquid crystal writing input device, comprising: the first conductive layer, the bistable liquid crystal layer, the second conductive layer, the basal layer and the electromagnetic induction layer are sequentially arranged; wherein the first conductive layer and the second conductive layer are respectively divided into at least two mutually insulated conductive areas; the conductive areas of the first conductive layer are distributed along a first direction and are parallel to each other; the conductive areas of the second conductive layer are distributed along the second direction and are parallel to each other, and the first direction and the second direction are staggered in space.
2. A bistable liquid crystal writing input device of claim 1, further comprising: the main control unit is connected with the electromagnetic induction layer.
3. A bistable liquid crystal writing input device of claim 2, further comprising: and the storage unit is connected with the main control unit.
4. A bistable liquid crystal writing input device of claim 1, further comprising: the bistable liquid crystal writing input device is communicated with the first display terminal through wires or wireless.
5. A bistable liquid crystal writing input device of claim 1 wherein said electromagnetic inducing layer is an electromagnetic inducing plate.
6. A bistable liquid crystal writing input device of claim 1, further comprising: an active or passive electromagnetic pen capable of emitting electromagnetic signals of at least three frequencies; the electromagnetic signal of the first frequency corresponds to a writing state, the electromagnetic signal of the first frequency corresponds to a state that the pen point is suspended, and the electromagnetic signal of the third frequency corresponds to an erasing state.
7. The bistable liquid crystal writing input device of claim 6 wherein said electromagnetic pen has an erase button on the end of said pen near the writing point, said erase button being depressed by said electromagnetic pen to emit electromagnetic signals at a third frequency.
8. A bistable liquid crystal writing input device of claim 6 wherein,
the electromagnetic pen is characterized in that an erasing part is arranged at one end, far away from the writing nib, of the electromagnetic pen, a micro switch is arranged in the erasing part, and when the erasing part is in contact with the writing input device, the micro switch can be triggered, so that the electromagnetic pen sends out electromagnetic signals with a third frequency.
9. A bistable liquid crystal writing input device of claim 8 wherein said eraser employs felt pads.
10. A bistable liquid crystal writing input device of claim 1 wherein said first conductive layer and second conductive layer are each divided into at least two insulated ribbon-like conductive areas; the first direction and the second direction are mutually perpendicular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222555869.5U CN219162679U (en) | 2022-09-26 | 2022-09-26 | Bistable liquid crystal writing input device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222555869.5U CN219162679U (en) | 2022-09-26 | 2022-09-26 | Bistable liquid crystal writing input device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219162679U true CN219162679U (en) | 2023-06-09 |
Family
ID=86638446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222555869.5U Active CN219162679U (en) | 2022-09-26 | 2022-09-26 | Bistable liquid crystal writing input device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219162679U (en) |
-
2022
- 2022-09-26 CN CN202222555869.5U patent/CN219162679U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6383069B2 (en) | DRIVE DEVICE FOR INFORMATION PROCESSING DEVICE AND INFORMATION PROCESSING SYSTEM USING MULTI TOUCH FUNCTION | |
| CN105892765A (en) | Intelligent handwriting board based on handwriting identification and synchronous terminal display | |
| CN203689461U (en) | Touch controlling pen and touch controlling device | |
| CN105892764A (en) | Intelligent handwriting tablet based on wireless synchronization of writing calligraphy | |
| CN110058782A (en) | Touch operation method and system based on interactive electronic whiteboard | |
| CN101887315A (en) | Electronic intelligent pen | |
| CN111458945A (en) | Writing device and display method thereof | |
| WO2014187155A1 (en) | Protective cover for tablet computer having original handwriting input function | |
| CN105975105A (en) | Touch pen system and touch pen | |
| CN109901331A (en) | Liquid crystal handwriting pad and liquid crystal tablet system | |
| CN103777785A (en) | Stylus pen and information device | |
| CN106814929A (en) | A kind of writing with electrical screen and written handwriting processing method based on flexible liquid crystal screen | |
| CN103713767A (en) | Method and apparatus for operating mobile terminal | |
| CN209167758U (en) | A kind of multi-color LCD clipboard | |
| CN209070267U (en) | Using etching technics can selective erase writing film, board, blackboard and drawing board | |
| CN219162679U (en) | Bistable liquid crystal writing input device | |
| CN210573714U (en) | Erasing device of electronic whiteboard | |
| CN208596359U (en) | Writing pencil and handwriting device | |
| CN209570780U (en) | Liquid crystal handwriting pad and liquid crystal tablet system | |
| CN111399674A (en) | Electronic device and electronic system | |
| TWM565336U (en) | Writing device and touch system | |
| CN110147172B (en) | Writing track positioning and recording device and method based on liquid crystal writing film | |
| CN210742910U (en) | Touch liquid crystal handwriting board | |
| CN104460851A (en) | Double-face touch electronic equipment and touch method | |
| CN208722160U (en) | A kind of liquid crystal writing film selective erase ultrasound positioning system, board, blackboard and drawing board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |