CN219285698U - Handwriting board applying virtual keyboard - Google Patents
Handwriting board applying virtual keyboard Download PDFInfo
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- CN219285698U CN219285698U CN202220984002.9U CN202220984002U CN219285698U CN 219285698 U CN219285698 U CN 219285698U CN 202220984002 U CN202220984002 U CN 202220984002U CN 219285698 U CN219285698 U CN 219285698U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The utility model discloses a handwriting board applying a virtual keyboard, which comprises a shell, wherein a liquid crystal display screen is arranged on the shell, an inner screen of the liquid crystal display screen is formed by splicing a plurality of sub-cells which are arranged transversely and longitudinally in a tight mode, a virtual keyboard is arranged at one side edge of the shell, a first single-chip microcomputer, an operation sensing unit and a laser projection module which are respectively connected with the first single-chip microcomputer are arranged in the virtual keyboard, sensing ends of the operation sensing unit and the laser projection end of the laser projection module face to the outer screen, sub-erasing modules are respectively connected with all the sub-cells, a second single-chip microcomputer is further arranged in the shell, and the second single-chip microcomputer is connected with the first single-chip microcomputer and can respectively and independently control all the sub-erasing modules.
Description
Technical Field
The utility model relates to the field of handwriting boards with liquid crystal screens, in particular to a handwriting board with a virtual keyboard.
Background
At present, the application of the liquid crystal handwriting board is more and more extensive in the fields of education, business application and the like, and the performance requirement of the liquid crystal handwriting board promotes the continuous development of the liquid crystal handwriting board technology and the updating of products.
In the field of liquid crystal handwriting boards, the erasing mode of the liquid crystal handwriting board is mainly based on all erasure by power-on, the influence of the mode on user experience is quite large, and meanwhile, the liquid crystal handwriting board cannot expand the market, especially the maximum resistance of the march education market. The external fields influencing the arrangement and structure of the liquid crystal mainly comprise five types of sound, light, electricity, heat and magnetism, the current main stream of local erasing methods are three external fields of light, electricity and heat, for example, the technical means of the Chinese patent utility model CN201711349246.X is to realize local elimination by adopting photo-thermal conversion, but the light and heat can accelerate the aging of a liquid crystal handwriting board; for example, the technical means of the Chinese patent No. CN201910264686.8 is to control the layering voltage of the liquid crystal polymer to reach the threshold value to realize local elimination, but the method is used to make the manufacturing process of the handwriting board more complex and has extremely high cost; for example, chinese patent No. CN201910712249.8 discloses that local erasure is achieved by using a magnetic field, but the influence of the magnetic field on the liquid crystal material is relatively weak, and it is not practical to achieve local erasure by directly applying the magnetic field to the liquid crystal material.
At present, the handwriting board on the market also adopts modes such as ultrasonic wave, semiconductor, thermal erasing, row matrix and the like to realize local elimination, but has higher basic production cost and poorer stability, and particularly when the liquid crystal screen of the handwriting board is larger, once a more complex local elimination structure or mode is adopted, the handwriting board is quite easy to cause permanent damage once being improperly operated, and the technology is relatively immature, the production cost is higher, the liquid crystal handwriting board cannot be widely applied to the market, and the technological breakthrough is the key point of the education intelligent electronic consumer products on the market.
Disclosure of Invention
In order to solve the above problems, the present utility model provides a handwriting board using a virtual keyboard. The technical scheme adopted by the utility model is as follows: a handwriting pad for applying a virtual keyboard, comprising:
a housing;
the liquid crystal display screen is arranged on the front side surface of the shell and comprises an outer screen and an inner screen which are mutually clung, and the inner screen is formed by splicing a plurality of sub-cells which are tightly arranged in the transverse and longitudinal directions;
the virtual keyboard is arranged at one side edge of the shell, a first single chip microcomputer, an operation sensing unit and a laser projection module are arranged in the virtual keyboard, and the operation sensing unit and the laser projection module are respectively connected with the first single chip microcomputer, wherein a sensing end of the operation sensing unit and a laser projection end of the laser projection module face the outer screen;
the electric erasing module comprises a plurality of sub-erasing modules which are correspondingly arranged on the sub-unit cells;
the second single chip microcomputer is electrically connected with the first single chip microcomputer, and the second single chip microcomputer is respectively connected with and can independently control a plurality of sub-erasing modules;
and the power supply module is connected with the second singlechip.
Generally, an information storage module, a positioning analysis module and an information feedback module are arranged in the first singlechip, the operation sensing unit is used for acquiring original image information clicked by a user at a corresponding position on the external screen and transmitting the original image information to the positioning analysis module, and the positioning analysis module is used for analyzing the received image information, confirming a center coordinate corresponding to the clicked position and feeding back the center coordinate to the second singlechip through the information feedback module. The information storage module is used for storing the data of the central coordinates, and is convenient for data retrieval and data transmission in the analysis process of the positioning analysis module.
The second singlechip is provided with an information receiving module, an information processing module and a central control module, wherein the information receiving module is used for receiving the central coordinate information fed back by the information feedback module, the information processing module is used for converting the central coordinate and transmitting the converted information to the central control module, and the central control module is used for independently controlling the sub-erasing module corresponding to the central coordinate to work so as to erase writing marks on the sub-unit cells corresponding to the central coordinate.
Preferably, the virtual keyboard is installed at the middle position of one side edge of the shell, and the projection laser of the laser projection module covers the outer screen.
Preferably, a chute is arranged at one side edge of the shell, and the virtual keyboard is slidably mounted on the chute.
Preferably, a rotating member is disposed at one end of the virtual keyboard connected to the housing, and the rotating member is used for assisting in adjusting the sensing direction of the operation sensing unit and the laser projection direction of the laser projection module.
Preferably, a wire winding wheel and at least one bearing piece are arranged inside the shell, an electric wiring connected to the virtual keyboard sequentially bypasses the bearing piece and the wire winding wheel and is finally connected to the second single chip microcomputer, and a wire clamping piece used for being fixedly connected to the electric wiring of the second single chip microcomputer is arranged on the wire winding wheel.
When the coverage area of the liquid crystal display is actually too large, the laser projection range of the single virtual keyboard may not cover the whole liquid crystal display, so that the position of the virtual keyboard relative to the shell can be freely adjusted according to the position which is partially eliminated as required.
When the virtual keyboard slides in the sliding groove through the sliding part, the electric wiring connected to the sliding part can realize transmission similar to the chain belt form of the chain wheel through the bearing part, and in order to ensure the tightening of the electric wiring, the electric wiring is wound up through the winding wheel pair. It should be noted that the take-up pulley is only an auxiliary take-up pulley, and electrical wiring between the take-up pulley and the second singlechip is not affected, the electrical wiring position between the take-up pulley and the second singlechip is unchanged, and the take-up pulley is fixed on the take-up pulley through the clamping piece.
Preferably, the operation sensing unit comprises a camera, an infrared linear emitter and an image sensor, an infrared filter is arranged on a lens upper cover of the camera, the camera is connected with the image sensor, and infrared rays emitted by the infrared linear emitter are parallel to a horizontal plane where the liquid crystal display screen is located.
Preferably, the laser projection module projects laser to the external screen, and projects on the external screen to form a plurality of laser projection unit cells which respectively correspond to the sub-unit cells and are arranged horizontally and vertically.
Preferably, the projection areas of the plurality of laser projection cells are provided with numbers, and the numbers are sequentially ordered according to the transverse and longitudinal arrangement sequence of the laser projection cells.
More preferably, the shell is provided with a total elimination control switch, and the total elimination control switch is electrically connected to the second singlechip. The total elimination control switch is used for controlling the second singlechip to send elimination instructions to all the sub-erasure modules, and eliminating all handwriting on the liquid crystal display screen.
Working principle: when a user judges that the local writing trace on the liquid crystal display screen needs to be erased, the virtual keyboard is started, the laser projection module and the operation sensing unit on the virtual keyboard can work simultaneously, the laser projection module projects laser onto the outer screen of the liquid crystal display screen and forms a plurality of laser projection cells which are horizontally and longitudinally arranged, the laser projection cells respectively correspond to each sub-cell, and generally, the laser projection cells comprise corresponding numbers, so that the numbers of projection are carried out on all the sub-cells on the liquid crystal display screen. After confirming the position needing to be locally erased, a user clicks the laser projection cell corresponding to the local erasing position by hands or other contact objects, at the moment, the hands or the contact objects shield infrared rays emitted by the infrared linear emitter and reflect the infrared rays to the camera, the camera and the image sensor act together and cooperate with the positioning analysis module in the first singlechip to confirm the central coordinate corresponding to the clicked laser projection cell, the central coordinate is fed back to the second singlechip through the information feedback module, the general information storage module is used for storing data of the central coordinate, the data acquisition and the data transmission in the analysis process of the positioning analysis module are convenient, the information receiving module in the second singlechip receives information and then sends working signals to the sub-erasing module on the sub-cell corresponding to the central coordinate through the information processing module and the central control module, and the sub-erasing module works to realize the local elimination of the liquid crystal display screen.
Compared with the prior art, the utility model has the following beneficial effects:
1. the inner screen of the complete liquid crystal display screen is divided into a plurality of independent sub-cells, and the sub-cells are controlled respectively and independently through the sub-erasing module, so that local erasing can be realized, if the sub-cells are damaged, the replacement and the repair are easy, and the repair cost is low;
2. the control voltage erasing means with the most stable and the lowest cost is adopted continuously, the production cost is low, and the structure is simple;
3. the virtual keyboard is used as an independent part, is convenient to replace and disassemble, has low maintenance cost, has mature technical means and is relatively low in configuration cost;
4. the laser and the infrared rays projected by the virtual keyboard are harmless to the human body, and the handwriting board is not damaged, so that the service life of the handwriting board is not influenced;
5. the method is suitable for local erasure of a large-area liquid crystal display screen, only a virtual keyboard is required to be opened, and the position to be erased is clicked, so that the method is free from effort, convenient to operate and quick in response.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an overall block diagram of the present utility model;
FIG. 2 is a schematic illustration of an internal cross-sectional proposal of the present utility model;
FIG. 3 is an enlarged view of part A of FIG. 2;
FIG. 4 is a schematic diagram of a virtual keyboard sliding structure according to the present utility model;
FIG. 5 is a schematic view of the inner screen structure of the present utility model;
FIG. 6 is a block diagram of the overall principle of the utility model;
FIG. 7 is a schematic block diagram of interaction between a first SCM and a second SCM in the present utility model.
The reference numerals in the drawings are: the intelligent electronic control system comprises a 1-shell, a 101-sliding groove, a 2-liquid crystal display screen, a 201-outer screen, a 202-inner screen, 2021-subunits, a 3-virtual keyboard, a 301-first single-chip microcomputer, a 3011-information storage module, a 3012-positioning analysis module, a 3013-information feedback module, a 302-operation sensing unit, a 3021-camera, a 3022-infrared linear transmitter, a 303-laser projection module, a 4-power module, a 5-second single-chip microcomputer, a 501-central control module, a 502-information processing module, a 503-information receiving module, a 6-electric erasing module, a 601-sub-erasing module, a 7-bearing piece, an 8-wire-collecting wheel and a 9-total elimination control switch.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
Specific embodiments: referring to fig. 1-7, the present utility model is a handwriting board applying a virtual keyboard, comprising:
a housing 1;
the liquid crystal display screen 2 is arranged on the front side surface of the shell 1 and comprises an outer screen 201 and an inner screen 202 which are mutually clung, wherein the inner screen 202 is formed by splicing a plurality of sub-unit cells 2021 which are tightly arranged in the transverse and longitudinal directions;
the virtual keyboard 3 is arranged at one side edge of the shell 1, and is internally provided with a first single chip microcomputer 301, and an operation sensing unit 302 and a laser projection module 303 which are respectively connected with the first single chip microcomputer 301, wherein a sensing end of the operation sensing unit 302 and a laser projection end of the laser projection module 303 face the external screen 201;
the electric erasing module 6 comprises a plurality of sub-erasing modules 601 correspondingly arranged on the sub-unit cells 2021; the second single-chip microcomputer 5 is electrically connected to the first single-chip microcomputer 301, and the second single-chip microcomputer 5 is respectively connected with and can independently control the plurality of sub-erasing modules 601;
and the power supply module 4 is connected with the second singlechip 5.
Generally, the first single-chip microcomputer 301 is provided with an information storage module 3011, a positioning analysis module 3012 and an information feedback module 3013, the operation sensing unit 302 is configured to obtain original image information of a corresponding position clicked by a user on the external screen 202, transmit the original image information to the positioning analysis module 3012, and the positioning analysis module 3012 is configured to analyze the received image information, confirm a central coordinate corresponding to the clicked position, and feed back the central coordinate to the second single-chip microcomputer 5 through the information feedback module 3013. The information storage module 3011 is used for storing data of central coordinates, and is convenient for data retrieval and data transmission in the analysis process of the positioning analysis module 3012.
The second singlechip 5 is provided with an information receiving module 503, an information processing module 502 and a central control module 501, the information receiving module 503 is used for receiving the central coordinate information fed back by the information feedback module 3013, the information processing module 502 is used for converting the central coordinate and transmitting the converted information to the central control module 501, and the central control module 501 is used for independently controlling the sub-erasing module 601 corresponding to the central coordinate to work so as to erase writing marks on the sub-unit cell 2021 corresponding to the central coordinate.
As a preferred implementation of this embodiment, the virtual keyboard 3 is mounted at a position in the middle of one side edge of the casing 1, and the projection laser of the laser projection module 303 covers the completed external screen 201.
As another preferred implementation of this embodiment, a chute 101 is provided at one side edge of the housing 1, and the virtual keyboard 3 is slidably mounted on the chute 101.
Then, a rotating member is provided at one end of the virtual keyboard 3 connected to the housing 1, and the rotating member is used for assisting in adjusting the sensing direction of the operation sensing unit 302 and the laser projection direction of the laser projection module 303.
In this embodiment, the casing 1 is internally provided with a wire winding wheel 8 and at least one bearing member 7, the electric wire connected to the virtual keyboard 3 sequentially bypasses the bearing member 7 and the wire winding wheel 8 and is finally connected to the second single chip microcomputer 5, and the wire winding wheel 8 is provided with a wire clamping member for fixedly connecting to the electric wire of the second single chip microcomputer 5.
When the coverage of the lcd 2 is actually too large, the laser projection range of the single virtual keyboard 3 may not cover the entire lcd 2, so that the position of the virtual keyboard 3 relative to the housing 1 may be freely adjusted according to the position that needs to be partially eliminated.
Referring to fig. 4, when the virtual keyboard 3 slides in the sliding groove 101 through the sliding member, the electric wire connected to the sliding member is driven in a similar manner to a chain belt of a chain wheel through the bearing member 7, and the electric wire is wound up through the wire winding wheel 8 in order to ensure the tightness of the electric wire. It should be noted that the take-up pulley 8 is only an auxiliary take-up pulley, and electrical wiring between the take-up pulley 8 and the second single chip microcomputer 5 is not affected, and the electrical wiring position between the take-up pulley 8 and the second single chip microcomputer 5 is unchanged and is fixed on the take-up pulley 8 through a clamping piece.
In addition, the operation sensing unit 302 includes a camera 3021, an infrared in-line emitter 3022 and an image sensor, where an infrared filter is disposed on a lens upper cover of the camera 3021, the camera 3021 is connected to the image sensor, and the infrared emitted by the infrared in-line emitter 3022 is parallel to a horizontal plane where the liquid crystal display 2 is located.
In this embodiment, the laser projection module 303 projects laser onto the external screen 201, and forms a plurality of laser projection cells on the external screen 201, which correspond to the sub-cells 2021 respectively and are arranged horizontally and vertically.
Specifically, the projection areas of the laser projection unit cells are provided with numbers, and the numbers are sequentially ordered according to the transverse and longitudinal arrangement sequence of the laser projection unit cells.
More specifically, the shell 1 is provided with a total elimination control switch 9, and the total elimination control switch 9 is electrically connected to the second singlechip 5. The total elimination control switch 9 is used for controlling the second singlechip 5 to send elimination instructions to all the sub-erasure modules 601, and eliminating all the handwriting on the liquid crystal display screen 2.
Working principle: when a user judges that the local writing trace on the liquid crystal display 2 needs to be erased, the virtual keyboard 3 is started, the laser projection module 303 and the operation sensing unit 302 on the virtual keyboard 3 work simultaneously, the laser projection module 303 projects laser onto the outer screen of the liquid crystal display, a plurality of horizontally and longitudinally arranged laser projection cells are formed, the laser projection cells respectively correspond to each sub-cell 2021, and generally, the laser projection cells contain corresponding numbers, so that the projection numbers are carried out on all the sub-cells 2021 on the liquid crystal display 2. After confirming the position to be erased locally, the user clicks the laser projection cell corresponding to the position to be erased locally by hand or other contact objects, at this time, the hand or contact objects shield the infrared rays emitted by the infrared linear emitter 3022 and reflect the infrared rays to the camera 3021, the camera 3021 and the image sensor act together and cooperate with the positioning analysis module 3012 in the first singlechip 301 to confirm the central coordinate corresponding to the clicked laser projection cell, and feed the central coordinate back to the second singlechip 5 through the information feedback module 3013, so that the data for storing the central coordinate in the general information storage module 3011 is convenient for data acquisition and data transmission in the analysis process of the positioning analysis module 3012, and after the information receiving module 503 in the second singlechip 5 receives information, the sub-erasing module 601 on the sub-cell 2021 corresponding to the central coordinate is sent to a working signal through the information processing module 502 and the central control module 501, and the sub-erasing module 601 works to realize local elimination of the liquid crystal display 2.
The above description of a handwriting board using a virtual keyboard is merely a preferred embodiment of the present utility model, and is not limited to the scope of the present utility model, and all equivalent structural changes made by the description and the drawings of the present utility model or direct/indirect application in other related technical fields are included in the scope of the present utility model.
Claims (9)
1. A handwriting pad for applying a virtual keyboard, comprising:
a housing;
the liquid crystal display screen is arranged on the front side surface of the shell and comprises an outer screen and an inner screen which are mutually clung, and the inner screen is formed by splicing a plurality of sub-cells which are tightly arranged in the transverse and longitudinal directions;
the virtual keyboard is arranged at one side edge of the shell, a first single chip microcomputer, an operation sensing unit and a laser projection module are arranged in the virtual keyboard, and the operation sensing unit and the laser projection module are respectively connected with the first single chip microcomputer, wherein a sensing end of the operation sensing unit and a laser projection end of the laser projection module face the outer screen;
the electric erasing module comprises a plurality of sub-erasing modules which are correspondingly arranged on the sub-unit cells;
the second single chip microcomputer is electrically connected with the first single chip microcomputer, and the second single chip microcomputer is respectively connected with and can independently control a plurality of sub-erasing modules;
and the power supply module is connected with the second singlechip.
2. The writing pad using a virtual keyboard according to claim 1, wherein the virtual keyboard is mounted at a middle position of an edge of the casing, and the projection laser of the laser projection module covers the external screen.
3. The writing pad using a virtual keyboard as recited in claim 1, wherein a side edge of the housing is provided with a chute, and the virtual keyboard is slidably mounted on the chute.
4. A writing pad using a virtual keyboard according to claim 3, wherein a rotating member is disposed at an end of the virtual keyboard connected to the housing, the rotating member being used for assisting in adjusting the sensing direction of the operation sensing unit and the laser projection direction of the laser projection module.
5. The writing pad for applying a virtual keyboard according to any one of claims 3 to 4, wherein a wire winding wheel and at least one bearing member are arranged inside the housing, an electric wire connected to the virtual keyboard sequentially bypasses the bearing member and the wire winding wheel and is finally connected to the second single chip microcomputer, and a wire clamping member for fixedly connecting to the electric wire of the second single chip microcomputer is arranged on the wire winding wheel.
6. The handwriting board applying the virtual keyboard according to claim 1, wherein the operation sensing unit comprises a camera, an infrared linear emitter and an image sensor, an infrared filter is arranged on a lens upper cover of the camera, the camera is connected with the image sensor, and infrared rays emitted by the infrared linear emitter are parallel to a horizontal plane where the liquid crystal display screen is located.
7. The writing pad using a virtual keyboard as claimed in claim 1, wherein the laser projection module projects laser onto the external screen, and forms a plurality of laser projection cells corresponding to the sub cells respectively and arranged horizontally and vertically on the external screen.
8. The writing pad using a virtual keyboard of claim 7, wherein a plurality of the laser projection cells are provided with numbers in the projection area, and the numbers are sequentially ordered according to the horizontal and vertical arrangement order of the laser projection cells.
9. The handwriting board applying the virtual keyboard according to claim 1, wherein a full-elimination control switch is arranged on the housing, and the full-elimination control switch is electrically connected to the second single-chip microcomputer.
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| CN202220984002.9U CN219285698U (en) | 2022-04-26 | 2022-04-26 | Handwriting board applying virtual keyboard |
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| CN202220984002.9U CN219285698U (en) | 2022-04-26 | 2022-04-26 | Handwriting board applying virtual keyboard |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114755853A (en) * | 2022-04-26 | 2022-07-15 | 义乌市百变电子科技有限公司 | Local erasing method for liquid crystal handwriting board applying virtual keyboard |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114755853A (en) * | 2022-04-26 | 2022-07-15 | 义乌市百变电子科技有限公司 | Local erasing method for liquid crystal handwriting board applying virtual keyboard |
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