CN110018758B - Electronic whiteboard, electronic blackboard eraser and electronic pen - Google Patents
Electronic whiteboard, electronic blackboard eraser and electronic pen Download PDFInfo
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- CN110018758B CN110018758B CN201810023910.XA CN201810023910A CN110018758B CN 110018758 B CN110018758 B CN 110018758B CN 201810023910 A CN201810023910 A CN 201810023910A CN 110018758 B CN110018758 B CN 110018758B
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- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 87
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 58
- 230000006698 induction Effects 0.000 claims abstract description 24
- 230000008859 change Effects 0.000 claims abstract description 12
- 239000010410 layer Substances 0.000 claims description 28
- 239000011241 protective layer Substances 0.000 claims description 4
- 230000001939 inductive effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008707 rearrangement Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Drawing Aids And Blackboards (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses an electronic whiteboard, an electronic blackboard eraser and an electronic pen. The electronic whiteboard comprises an input part, a circuit board and an output interface; the input part comprises a liquid crystal panel and an electronic coil induction layer positioned at the lower layer of the liquid crystal panel, and the electronic coil induction layer is connected with the circuit board; the circuit board is provided with a power supply circuit for supplying power to the liquid crystal panel and the electronic coil induction layer; the output interface is connected with the outside; the electronic coil induction layer is provided with a set number of electromagnetic induction coils in each set area, and when the electronic whiteboard is contacted with the electronic blackboard eraser containing the electromagnetic induction coils, the liquid crystal molecular sequences in the appointed area in the liquid crystal panel are rearranged through the generated electromagnetic induction change. The proposal provided by the invention can ensure that the electronic handwriting of the electronic whiteboard is erased more cleanly, the electronic blackboard eraser can protect the surface of the electronic whiteboard more, thereby prolonging the service life of the electronic whiteboard, and the electronic pen has more functions and is more convenient for users to use.
Description
Technical Field
The invention relates to the technical field of electromagnetic induction whiteboards, in particular to an electronic whiteboard, an electronic blackboard eraser and an electronic pen.
Background
Currently, electronic whiteboards are increasingly used. The electronic whiteboard generally comprises a capacitive whiteboard, an electromagnetic induction whiteboard and other types, wherein the electromagnetic induction whiteboard is a device for realizing man-machine interaction by utilizing an electromagnetic induction principle, and generally comprises a display screen, coils, a power supply circuit and the like, when an electronic pen touches the display screen of the whiteboard, the coils sense electromagnetic waves emitted by the electronic pen, induced electromotive force is generated, and the touch point of the electronic pen is accurately positioned by monitoring the potential or the current of each coil in the coil array.
However, about 20% handwriting remains after the electronic handwriting of the liquid crystal area of the electronic whiteboard in the prior art is erased, and the erasing is not clean, if the erasing force of the erasing area is larger than 3N/cm, for example 2 The liquid crystal panel of the electronic whiteboard is greatly affected, so that the service life of the electronic whiteboard is reduced; the existing electronic pen matched with the electronic whiteboard has simple functions, can only support page turning of documents besides the writing function, and is inconvenient to use.
Disclosure of Invention
Therefore, the invention aims to provide an electronic whiteboard, an electronic blackboard eraser and an electronic pen, which can enable electronic handwriting of the electronic whiteboard to be erased more cleanly, enable the electronic blackboard eraser to protect the surface of the electronic whiteboard more, further prolong the service life of the electronic whiteboard, enable the electronic pen to have more functions and be more convenient for users to use.
According to one aspect of the present invention, there is provided an electronic whiteboard:
the circuit comprises an input part, a circuit board and an output interface;
the input part comprises a liquid crystal panel and an electronic coil induction layer positioned at the lower layer of the liquid crystal panel, and the electronic coil induction layer is connected with the circuit board;
the circuit board is provided with a power supply circuit for supplying power to the liquid crystal panel and the electronic coil induction layer;
the output interface is connected with the outside;
the electronic coil induction layer is provided with a set number of electromagnetic induction coils in each set area, and when the electronic whiteboard is contacted with the electronic blackboard eraser containing the electromagnetic induction coils, the liquid crystal molecular sequences in the appointed area in the liquid crystal panel are rearranged through the generated electromagnetic induction change.
Preferably, the electronic coil induction layer is provided with a set number of electromagnetic induction coils in each set area, and the electronic coil induction layer comprises:
the electronic coil induction layer is provided with 20 electromagnetic induction coils per square centimeter, and each electromagnetic induction coil generates 50 magnetic field concentric circles.
According to another aspect of the present invention, there is provided an electronic blackboard eraser:
the blackboard eraser comprises an blackboard eraser main body, an erasing contact surface positioned on the surface of the blackboard eraser main body, an electromagnetic induction coil positioned in the blackboard eraser main body, a battery positioned in the blackboard eraser main body, a power supply touch switch positioned on the surface of the blackboard eraser main body and a circuit board positioned in the blackboard eraser main body;
the battery, the power supply touch switch and the electromagnetic induction coil are electrically connected with the circuit board;
when the electronic blackboard eraser is contacted with an electronic whiteboard with an electromagnetic induction coil, the liquid crystal molecule sequences of the appointed area in the liquid crystal panel of the electronic whiteboard are rearranged through the generated electromagnetic induction change.
Preferably, the electronic blackboard eraser is provided with electromagnetic induction coils in each set area inside the blackboard eraser main body.
Preferably, the electronic blackboard eraser is provided with electromagnetic induction coils in each set area inside the blackboard eraser main body, and the electronic blackboard eraser comprises:
the electronic blackboard eraser is characterized in that an electromagnetic induction coil is arranged in the main body of the blackboard eraser every 0.3 square millimeter.
Preferably, the erasing contact surface is provided with a protective layer contacting with the liquid crystal panel of the electronic whiteboard.
According to another aspect of the present invention, there is provided an electronic pen applied to an electronic whiteboard:
the pen comprises a pen body, a pen point arranged at the bottom of the pen body, a liquid crystal plate arranged at the middle lower part of the pen body, a right key button adjacent to the liquid crystal plate and positioned below the liquid crystal plate, a left key button adjacent to the liquid crystal plate and positioned above the liquid crystal plate, a slide ring arranged at the middle upper part of the pen body, a track ball arranged at the top of the pen body and a pen buckle arranged in an extending manner from the upper part of the pen body.
Preferably, the pen point is a touch pen point; or alternatively, the first and second heat exchangers may be,
the liquid crystal panel displays the state of the electronic pen.
Preferably, the sliding ring is a rotatable sliding ring, and when the sliding ring is slid, a page turning command is executed; or alternatively, the first and second heat exchangers may be,
the track ball executes a cursor moving command when touched and triggers the switch of the left key button when pressed.
Preferably, the electronic pen is further provided with an infrared device module supporting infrared display, and/or,
the electronic pen is also provided with a Bluetooth device module supporting Bluetooth connection.
It can be found that the electronic whiteboard provided by the embodiment of the invention comprises an input part, a circuit board and an output interface, wherein the input part comprises a liquid crystal panel and an electronic coil induction layer positioned at the lower layer of the liquid crystal panel, wherein the electronic coil induction layer is provided with a set number of electromagnetic induction coils in each set area, so that when the electronic whiteboard is contacted with an electronic blackboard eraser containing the electromagnetic induction coils, the liquid crystal molecular sequence of a designated area in the liquid crystal panel is rearranged through the generated electromagnetic induction change, and the cleaner electronic handwriting erasing effect of the electronic whiteboard is realized.
The electronic blackboard eraser provided by the embodiment of the invention comprises a blackboard eraser main body, an erasing contact surface positioned on the surface of the blackboard eraser main body, an electromagnetic induction coil positioned in the blackboard eraser main body and the like, wherein when the electronic blackboard eraser is contacted with an electronic whiteboard containing the electromagnetic induction coil, the generated electromagnetic induction change enables the liquid crystal molecule sequences of the appointed area in the liquid crystal panel of the electronic whiteboard to be rearranged, so that the cleaner electronic handwriting erasing effect of the electronic whiteboard is realized.
The electronic pen applied to the electronic whiteboard provided by the embodiment of the invention comprises a pen body, a pen point arranged at the bottom of the pen body, a liquid crystal plate arranged at the middle lower part of the pen body, a right key button adjacent to the liquid crystal plate and positioned below the liquid crystal plate, a left key button adjacent to the liquid crystal plate and positioned above the liquid crystal plate, a slide ring arranged at the middle upper part of the pen body, a track ball arranged at the top of the pen body and a pen buckle extending from the upper part of the pen body, so that the electronic pen has a plurality of other application functions besides the existing writing function and the page turning function of supporting documents, and is more convenient for users to use.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout exemplary embodiments of the disclosure.
FIG. 1 is a schematic block diagram of an electronic whiteboard according to one embodiment of the present invention;
FIG. 2 is a schematic block diagram of an electronic blackboard eraser according to one embodiment of the present invention;
fig. 3 is a schematic block diagram of an electronic pen according to one embodiment of the invention.
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The invention provides an electronic whiteboard, an electronic blackboard eraser and an electronic pen, which can enable electronic handwriting on the electronic whiteboard to be erased more cleanly, enable the electronic blackboard eraser to protect the surface of the electronic whiteboard more, further prolong the service life of the electronic whiteboard, enable the electronic pen to have more functions and be more convenient for users to use.
The following describes the technical scheme of the embodiment of the present invention in detail with reference to the accompanying drawings.
Fig. 1 is a schematic block diagram of an electronic whiteboard according to one embodiment of the present invention.
Referring to fig. 1, the present invention provides an electromagnetic induction liquid crystal electronic whiteboard, which can rearrange liquid crystal molecule sequences in a designated area of a liquid crystal panel through electromagnetic induction change, so that electronic handwriting (display effect when ordering of the liquid crystal molecule sequences is changed)) on the electronic whiteboard is erased more cleanly.
The liquid crystal electronic whiteboard 10 of the present invention mainly includes: the input part 11, the circuit board 12 and the output interface 13, wherein the input part 11 comprises a liquid crystal panel 111 (i.e. a writing layer) and an electronic coil induction layer 112 positioned at the lower layer of the liquid crystal panel 111, wherein the electronic coil induction layer 112 is provided with an electromagnetic induction coil, the output end of the electronic coil induction layer 112 is connected with the circuit board 12, a power supply circuit 121 is arranged on the circuit board 12 and used for providing power for the liquid crystal panel 111 and the electronic coil induction layer 112, and the output interface 13 is connected with the outside.
In the liquid crystal electronic whiteboard 10 of the present invention, a set number of electromagnetic induction coils are provided in each set area, for example, 20 electromagnetic induction coils are provided in each square centimeter, each electromagnetic induction coil generates 50 concentric circles of magnetic field, and each electromagnetic induction coil controls the supply and discharge processes of all liquid crystals in the area thereof, in the lower layer of the liquid crystal panel 111, that is, the electronic coil induction layer 112. The 20 electromagnetic induction coils can generate 1000 magnetic field concentric circles, and the circuit board in the liquid crystal unit area is driven to charge and discharge by electromagnetic induction change generated when the electronic blackboard eraser contacts the liquid crystal panel of the electronic whiteboard, so that the rearrangement of the liquid crystal molecular sequence in the appointed area in the liquid crystal panel is completed, and the cleaner electronic handwriting erasing effect of the electronic whiteboard is realized.
It should be noted that, 20 electromagnetic induction coils are provided per square centimeter, which is merely illustrative but not limiting, and other areas and numbers of electromagnetic induction coils can be provided according to the process requirements. Wherein the more coils per unit area, the more convenient the control of the amount of liquid crystal designated in the region.
The electromagnetic induction coil on the electronic coil induction layer 112 is used for controlling a charging switch of a circuit board of a liquid crystal area in a designated area, when the charging switch is charged, the liquid crystal molecule sequences in the area are rearranged, and when the charging switch is powered off, the arrangement (such as handwriting display) of the liquid crystal molecule sequences in the contact area can be changed through the writing pressure of the surface of the liquid crystal panel.
According to the scheme, compared with the prior art, the electronic whiteboard provided by the invention adopts the electromagnetic induction technology to finish the rearrangement of the liquid crystal molecular sequence in the appointed area of the liquid crystal panel, so that the electronic handwriting can be better erased, and the electronic handwriting on the electronic whiteboard can be more cleanly erased.
Fig. 2 is a schematic block diagram of an electronic blackboard eraser according to one embodiment of the present invention.
Referring to fig. 2, the present invention provides an electronic blackboard eraser 20, the electronic blackboard eraser 20 mainly includes: the blackboard eraser comprises a blackboard eraser main body 21, an erasing contact surface 22 positioned on the surface of the blackboard eraser main body 21, an electromagnetic induction coil 23 positioned inside the blackboard eraser main body 21, a battery 24 (a power supply polymer battery or photovoltaic) positioned inside the blackboard eraser main body 21 and used for supplying power, a power supply touch switch 25 positioned on the surface of the blackboard eraser main body 21, a circuit board 26 positioned inside the blackboard eraser main body 21 and the like, wherein the battery 24, the power supply touch switch 25 and the electromagnetic induction coil 23 are electrically connected with the circuit board 26.
The erasing contact surface 22 is provided with a protective layer contacting with the liquid crystal panel of the electronic whiteboard, so that the friction force of the erasing in the erasing area is reduced, the liquid crystal panel of the electronic whiteboard can be better protected, and the service life of the electronic whiteboard is prolonged.
The electronic blackboard eraser 20 can be self-powered or rechargeable, and external energy is not needed when self-powered. For example, it can be converted into electricity for its operation by absorbing kinetic energy during the erasing process and storing a rechargeable battery.
The electronic blackboard eraser may be provided with electromagnetic induction coils 23 within a predetermined area, for example, every 0.3 square millimeter, inside the main body 21 of the blackboard eraser. It should be noted that the present invention is illustrated by, but not limited to, every 0.3 square millimeter, and the selection of the value may be set according to the minimum handwriting width of the actual writing. By arranging the electromagnetic induction coil 23 inside the blackboard eraser main body 21, when the electronic blackboard eraser is contacted with the electronic whiteboard, the liquid crystal molecule ordering in the area with smaller electronic whiteboard range is changed, so that a cleaner electronic handwriting erasing effect is realized. That is, the electronic blackboard eraser can be used for changing the rearrangement of the liquid crystal molecule sequence in the liquid crystal panel contact area of the electronic whiteboard, namely changing the sequence of the liquid crystal molecules in the liquid crystal panel of the electronic whiteboard, thereby being convenient for more rapidly erasing the electronic handwriting of areas with different sizes on the electronic whiteboard.
According to the scheme, the electronic blackboard eraser is provided with the electromagnetic induction coils with different sizes, and when the electronic blackboard eraser is contacted with the electronic whiteboard, the rearrangement of liquid crystal molecule sequences in the liquid crystal panel contact area of the electronic whiteboard can be changed through electromagnetic induction change, so that the electronic handwriting of the areas with different sizes can be erased more quickly; in addition, a protective layer which is contacted with the liquid crystal panel of the electronic whiteboard is arranged on the contact surface of the electronic whiteboard, so that the friction force of erasure in the erasure area is reduced, and the electronic whiteboard can be better protected; and the electronic blackboard eraser can also adopt a kinetic energy conversion device, can convert kinetic energy in the erasing process into electric energy used for working, store a rechargeable battery and realize automatic charging.
Fig. 3 is a schematic block diagram of an electronic pen according to one embodiment of the invention.
Referring to fig. 3, the present invention provides a multifunctional electronic pen, which mainly includes: the pen comprises a pen body 31, a pen tip 32 arranged at the bottom of the pen body 31, a liquid crystal panel 33 arranged at the middle and lower part of the pen body 31, a right key button 34 adjacent to the liquid crystal panel 33 and positioned below the liquid crystal panel 33, a left key button 35 adjacent to the liquid crystal panel 33 and positioned above the liquid crystal panel 33, a slide ring 36 arranged at the middle and upper part of the pen body 31, a track ball 37 arranged at the top of the pen body 31 and a pen buckle 38 extending from the upper part of the pen body 31.
Wherein, nib 32: the pen can be a touch pen point, and a touch function is supported. Because the nib 32 can be touched, the operation can be realized by only pressing the nib 32 to contact the operation surface of the electronic whiteboard when in use.
Liquid crystal panel 33: status display of the electronic pen may be supported to make the current use status more clear to the user, wherein the status display content of the pen may include, but is not limited to, the following: 1) The component being worked, for example, using a laser or turning pages, etc.; 2) Displaying electric quantity; 3) When turning pages, displaying the current page number and the total page number; 4) A current time.
Right key button 34: the common shortcut menu can be displayed through the key, for example, the common shortcut menu can be displayed according to a right-key menu provided by electronic whiteboard software or displayed according to a right-key menu provided by a system and other application programs, and the like, and the common shortcut menu can be similar to the right-key function of a mouse key.
Left key button 35: the key is similar to the left key function of a mouse key, and can perform selection operation and the like, for example, a track ball is operated after the left key 35 is selected, and the selected object can be moved or dragged; or the document, the application and the like of the system are operated, and the specific operation command can be set according to the supporting conditions of the system and the software. That is, the main function of the left key 35 in the system is to select a file or other application for movement or dragging.
Slide ring 36: is a rotatable slide for supporting a page turning function, and when slid, performs a page turning command, and when the slide 36 is slid, page turning up, down, left or right can be achieved.
Track ball 37: can be used for supporting cursor movement or supporting functions such as pressing and sliding. For example, by changing the relative position of the associated sensor by rotation of the trackball 37, the operating system is informed of the completion of the change in cursor position by the loss of the relative position change, and the command can be communicated via bluetooth. For example, the module device of the track ball 37 can trigger the switch of the left key button 35 after the track ball 37 is pressed down, so that the left key button 35 is in an on state, and the function of pressing and sliding can be realized.
Pen holder 38: the electronic pen is used for buckling the electronic pen at the relevant position and is convenient to carry, for example, buckled in a folder.
It should be noted that the electronic pen may further be provided with an infrared device module to support infrared display (not shown), for example, a protruding portion may be provided at the pen tip 32 upward by a distance of, for example, 3cm (centimeters), so that the laser pointer may be ejected, or the corresponding module may be mounted in a fixed manner without being ejected.
It should be noted that the electronic pen may further be provided with a bluetooth device module supporting bluetooth connection (not shown), and the functions supporting bluetooth connection and data communication may be performed by pressing the left key button 35 or the right key button 34 for a set period of time, for example, 3 seconds, for bluetooth pairing, but not limited thereto.
It should be noted that, an integrated circuit board may be used in the electronic pen to connect each functional module, and each functional module may be connected by a data line.
According to the scheme, compared with the electronic pen in the prior art, the electronic pen provided by the invention has the characteristics of multiple functions: the system supports touch writing, system control and document application control, and also has the functions of laser indication, charging, bluetooth communication and the like, so that multiple functions can be provided for a user, and the system is more convenient for the user to use.
The technical solution according to the present invention has been described in detail hereinabove with reference to the accompanying drawings.
Furthermore, the method according to the invention may also be implemented as a computer program or computer program product comprising computer program code instructions for performing the steps defined in the above-mentioned method of the invention.
Alternatively, the invention may also be embodied as a non-transitory machine-readable storage medium (or computer-readable storage medium, or machine-readable storage medium) having stored thereon executable code (or a computer program, or computer instruction code) which, when executed by a processor of an electronic device (or computing device, server, etc.), causes the processor to perform the steps of the above-described method according to the invention.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the disclosure herein may be implemented as electronic hardware, computer software, or combinations of both.
Those of ordinary skill in the art will appreciate that: the foregoing description of the embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. An electronic whiteboard, characterized in that:
the circuit comprises an input part, a circuit board and an output interface;
the input part comprises a liquid crystal panel and an electronic coil induction layer positioned at the lower layer of the liquid crystal panel, and the electronic coil induction layer is connected with the circuit board; wherein the liquid crystal panel is a writing layer;
the circuit board is provided with a power supply circuit for supplying power to the liquid crystal panel and the electronic coil induction layer;
the output interface is connected with the outside;
the electronic coil induction layer is provided with a set number of electromagnetic induction coils in each set area, and is used for controlling a charging switch of the circuit board of the liquid crystal area in the designated area, and when the electronic whiteboard is contacted with an electronic blackboard eraser containing the electromagnetic induction coils, the generated electromagnetic induction change is used for driving the circuit board of the liquid crystal unit area to charge and discharge the electronic whiteboard, so that the liquid crystal molecular sequence of the designated area in the liquid crystal panel is rearranged.
2. The electronic whiteboard of claim 1, wherein the electronic coil inductive layer provides a set number of electromagnetic induction coils per set area, comprising:
the electronic coil induction layer is provided with 20 electromagnetic induction coils per square centimeter, and each electromagnetic induction coil generates 50 magnetic field concentric circles.
3. An electronic blackboard eraser applied to the electronic whiteboard according to claim 1 or 2, characterized in that:
the blackboard eraser comprises an blackboard eraser main body, an erasing contact surface positioned on the surface of the blackboard eraser main body, an electromagnetic induction coil positioned in the blackboard eraser main body, a battery positioned in the blackboard eraser main body, a power supply touch switch positioned on the surface of the blackboard eraser main body and a circuit board positioned in the blackboard eraser main body;
the battery, the power supply touch switch and the electromagnetic induction coil are electrically connected with the circuit board;
when the electronic blackboard eraser is contacted with an electronic whiteboard with an electromagnetic induction coil, the liquid crystal molecule sequences of the appointed area in the liquid crystal panel of the electronic whiteboard are rearranged through the generated electromagnetic induction change.
4. An electronic blackboard eraser according to claim 3, characterized in that:
the electronic blackboard eraser is characterized in that electromagnetic induction coils are arranged in each set area inside the blackboard eraser main body.
5. The electronic blackboard eraser according to claim 4, wherein the electronic blackboard eraser is provided with electromagnetic induction coils in each set area inside the blackboard eraser main body, comprising:
the electronic blackboard eraser is characterized in that an electromagnetic induction coil is arranged in the main body of the blackboard eraser every 0.3 square millimeter.
6. The electronic blackboard eraser according to claim 4, wherein:
the erasing contact surface is provided with a protective layer which is contacted with the liquid crystal panel of the electronic whiteboard.
7. An electronic pen for use in an electronic whiteboard according to claim 1 or 2, wherein:
the pen comprises a pen body, a pen point arranged at the bottom of the pen body, a liquid crystal plate arranged at the middle lower part of the pen body, a right key button adjacent to the liquid crystal plate and positioned below the liquid crystal plate, a left key button adjacent to the liquid crystal plate and positioned above the liquid crystal plate, a slide ring arranged at the middle upper part of the pen body, a track ball arranged at the top of the pen body and a pen buckle arranged in an extending manner from the upper part of the pen body.
8. The electronic pen of claim 7, wherein:
the pen point is a touch pen point; or alternatively, the first and second heat exchangers may be,
the liquid crystal panel displays the state of the electronic pen.
9. The electronic pen of claim 7, wherein:
the sliding ring is a rotatable sliding ring, and when the sliding ring is slid, a page turning command is executed; or alternatively, the first and second heat exchangers may be,
the track ball executes a cursor moving command when touched and triggers the switch of the left key button when pressed.
10. The electronic pen of claim 7, wherein:
the electronic pen is also provided with an infrared device module supporting infrared display, and/or,
the electronic pen is also provided with a Bluetooth device module supporting Bluetooth connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810023910.XA CN110018758B (en) | 2018-01-10 | 2018-01-10 | Electronic whiteboard, electronic blackboard eraser and electronic pen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810023910.XA CN110018758B (en) | 2018-01-10 | 2018-01-10 | Electronic whiteboard, electronic blackboard eraser and electronic pen |
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| Publication Number | Publication Date |
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| CN110018758A CN110018758A (en) | 2019-07-16 |
| CN110018758B true CN110018758B (en) | 2023-10-27 |
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| CN201810023910.XA Active CN110018758B (en) | 2018-01-10 | 2018-01-10 | Electronic whiteboard, electronic blackboard eraser and electronic pen |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI727545B (en) * | 2019-12-11 | 2021-05-11 | 禾瑞亞科技股份有限公司 | Electronic system and method thereof for setting erasing area |
| CN110667287B (en) * | 2019-09-18 | 2021-08-24 | 深圳市东向同人科技有限公司 | Trace removal method and related product |
| CN110647249A (en) * | 2019-10-31 | 2020-01-03 | 深圳腾千里科技有限公司 | Erasing device for white board covered with dot matrix codes |
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