WO2020228268A1 - Tablette d'écriture manuscrite à cristaux liquides multifonction et système de surveillance - Google Patents

Tablette d'écriture manuscrite à cristaux liquides multifonction et système de surveillance Download PDF

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Publication number
WO2020228268A1
WO2020228268A1 PCT/CN2019/116278 CN2019116278W WO2020228268A1 WO 2020228268 A1 WO2020228268 A1 WO 2020228268A1 CN 2019116278 W CN2019116278 W CN 2019116278W WO 2020228268 A1 WO2020228268 A1 WO 2020228268A1
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WO
WIPO (PCT)
Prior art keywords
module
liquid crystal
crystal handwriting
alarm
multifunctional
Prior art date
Application number
PCT/CN2019/116278
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English (en)
Chinese (zh)
Inventor
何海洋
Original Assignee
何海洋
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 何海洋 filed Critical 何海洋
Publication of WO2020228268A1 publication Critical patent/WO2020228268A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • 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

Definitions

  • This application relates to the technical field of electronic equipment, and in particular to a multifunctional liquid crystal handwriting board and a monitoring system.
  • the purpose of this application is to provide a multifunctional liquid crystal handwriting board to solve the technical problems of single function and low practicability of the electronic liquid crystal handwriting board in the prior art to a certain extent.
  • the present application provides a multifunctional liquid crystal handwriting board, including: a body, a flexible liquid crystal handwriting module, a positioning module, and an energy supply device; wherein the flexible liquid crystal handwriting module is embedded on the surface of the body; the positioning module And the energy supply device is arranged inside the body, and both the positioning module and the flexible liquid crystal handwriting module are electrically connected with the energy supply device.
  • the body includes a panel and a base; the panel is connected to the base; the interior of the base is hollow; and the flexible liquid crystal handwriting module is embedded in the panel away from the On one side surface of the base.
  • a groove portion is provided on the side of the base away from the panel, the groove portion forms an accommodation space, and the accommodation space is configured as storage.
  • a cover plate is provided on the opening of the accommodating space, the cover plate is detachably connected to the edge of the opening of the accommodating space, and a scale is provided on the cover plate And geometric openwork patterns.
  • a first magnet is provided in the containing space, and a second magnet is provided on the cover plate; the first magnet and the second magnet interact to make the The cover plate is detachably adsorbed at the opening of the containing space.
  • an electronic clock is further arranged inside the main body, and the display screen of the electronic clock is embedded on a surface of the panel facing away from the base.
  • control module is arranged in the body, and the control module is electrically connected to the flexible liquid crystal handwriting module and the positioning module, respectively.
  • it further includes an alarm module; the alarm module is arranged in the body, and the alarm module is electrically connected to the control module, when the position identified by the positioning module leaves When the predetermined position is set, the control module can control the alarm module to issue an alarm and send the alarm signal generated by it to the terminal.
  • it further includes a fall trigger module; the fall trigger module is arranged inside the body and is electrically connected to the alarm module; the fall trigger module includes a shrapnel and a conducting part When the shrapnel is oscillated, it deforms relative to the conductive portion and electrically contacts the conductive portion to connect the circuit of the alarm module to make the alarm module issue a corresponding alarm.
  • a water flow channel is provided on the body, and the water flow channel communicates with the fall trigger module; when the body falls into the water, water flows through the water flow channel. Between the elastic piece and the conducting portion, so that the elastic piece and the conducting portion are connected.
  • it further includes a fall trigger module electrically connected to the control module;
  • the fall trigger module includes a multi-axis accelerometer, and the control module detects When the acceleration in all directions of the multifunctional liquid crystal handwriting board meets the preset fall characteristics, the alarm module is triggered to issue a corresponding alarm.
  • a water immersion sensor is further provided outside the body; the water immersion sensor is electrically connected to the alarm module, and is configured to be called when detecting that the body falls into the water.
  • the alarm module issues a corresponding alarm.
  • the energy supply device is a lithium battery.
  • This application also provides a multifunctional LCD handwriting board monitoring system, including a server and the multifunctional LCD handwriting board provided by this application;
  • the multifunctional liquid crystal handwriting board wirelessly communicates with the server, and sends the position information obtained by the positioning module to the server;
  • the server also communicates with the terminal, and sends the location information or alarm information generated according to the location information to the terminal.
  • the server is further configured to determine whether the multifunctional liquid crystal handwriting tablet is located in a set area according to a preset time detection strategy or position detection strategy, and report to the The terminal sends an alert.
  • the multifunctional liquid crystal handwriting board and monitoring system provided by the embodiments of this application include: a main body, a flexible liquid crystal handwriting module, a positioning module, and an energy supply device; wherein the flexible liquid crystal handwriting module is embedded on the surface of the main body, and the main body is capable of facing the flexible liquid crystal
  • the handwriting module provides effective support.
  • the user can use the flexible liquid crystal handwriting module as electronic draft paper for writing and drawing, which can be repeatedly erased and written, and has good environmental protection characteristics; the positioning module and the energy supply device are set inside the body and positioned Both the module and the flexible liquid crystal handwriting module are electrically connected to the power supply device, so that the power supply device can provide power to the positioning module and the flexible liquid crystal handwriting module, ensuring that the positioning module and the flexible liquid crystal handwriting module can be powered on.
  • an independent The accommodating slot is configured to store stationery; when the user carries the multifunctional LCD handwriting board and is far away from the predetermined position range of the positioning module, the positioning module can identify the user's position information, locate the user, and prevent the user from getting lost , Especially suitable for younger children.
  • the multifunctional liquid crystal handwriting board provided by the embodiments of the present application can be repeatedly erased and used as electronic draft paper, which ensures the convenience and environmental protection of the handwriting board. It also adds positioning and storage functions, and is especially suitable for older people. Small children can locate and recognize their location information to avoid getting lost. The function is diverse and has strong practicability.
  • FIG. 1 is a schematic structural diagram of a multifunctional liquid crystal handwriting tablet provided by an embodiment of the application at a first viewing angle;
  • FIG. 2 is a schematic structural diagram of a multifunctional liquid crystal handwriting tablet provided by an embodiment of the application in a second viewing angle
  • FIG. 3 is a schematic diagram of a part of the structure of a multifunctional liquid crystal handwriting board provided by an embodiment of the application;
  • FIG. 4 is another schematic diagram of the structure of the multifunctional liquid crystal handwriting board provided by the embodiment of the application.
  • Fig. 5 is a schematic diagram of a multifunctional liquid crystal handwriting board monitoring system provided by an embodiment of the application.
  • connection should be interpreted broadly unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • connection should be interpreted broadly unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • an embodiment of the present application provides a multifunctional liquid crystal handwriting board, which includes a main body 1, a flexible liquid crystal handwriting module 2, a positioning module, and an energy supply device 4.
  • the flexible liquid crystal handwriting module 2 is embedded on the surface of the body 1.
  • the positioning module and the energy supply device 4 are arranged inside the body 1, and both the positioning module and the flexible liquid crystal handwriting module 2 are electrically connected to the energy supply device 4.
  • the flexible liquid crystal handwriting module 2 is embedded on the surface of the main body 1.
  • the main body 1 can effectively support the flexible liquid crystal handwriting module 2.
  • the user can use the flexible liquid crystal handwriting module 2 as electronic draft paper for writing or drawing, and can be repeatedly erased and written. Has good environmental protection characteristics.
  • the positioning module and the energy supply device 4 are arranged inside the body 1, and both the positioning module and the flexible liquid crystal handwriting module 2 are electrically connected to the energy supply device 4, so that the power supply device can provide electric energy for the positioning module and the flexible liquid crystal handwriting module 2 to ensure positioning
  • the module and the flexible liquid crystal handwriting module 2 can be powered on.
  • the main body 1 can also be provided with an independent receiving groove, which is configured to store stationery.
  • the positioning module can recognize the user's position information, locate the user, and prevent the user from getting lost, especially suitable for young people child.
  • the multifunctional liquid crystal handwriting board provided in this embodiment can be repeatedly erased and used as electronic draft paper, which ensures the convenience and environmental protection of the handwriting board, and also adds positioning and storage functions, especially suitable for younger children , It can locate and recognize its location information, avoid getting lost, and has diverse functions and strong practicability.
  • the flexible liquid crystal handwriting module 2 is a bistable cholesteric liquid crystal handwriting board, and its working principle is that after the bistable cholesteric liquid crystal is added with a glare agent and assembled into a box, it will be changed by handwriting pressure. It can reflect incident natural light of different wavelengths to form a handwritten trace display. After the voltage is applied, the liquid crystal returns to the default arrangement, and the handwriting is eliminated.
  • the user can use a suitable stylus or directly use a finger to write or draw on the liquid crystal handwriting film of the bistable cholesteric liquid crystal handwriting board.
  • the positioning module is a GPS locator, a wifi locator, a Beidou locator, a base station locator, etc.
  • a GPS locator a wifi locator
  • a Beidou locator a Beidou locator
  • a base station locator a Beidou locator
  • the body 1 includes a panel 101 and a base 102.
  • the panel 101 is connected to the base 102, and the inside of the base 102 is hollow.
  • the flexible liquid crystal handwriting module 2 is embedded on the surface of the panel 101 facing away from the base 102.
  • the panel 101 and the base 102 are detachably connected, and the inside of the base 102 is hollow, so that there is enough space inside to accommodate the positioning module and the energy supply device 4.
  • An installation window is opened on the panel 101, and the handwriting surface of the flexible liquid crystal handwriting module 2 is exposed on the installation window of the panel 101, and the handwriting surface of the flexible liquid crystal handwriting module 2 can be directly used for writing and drawing.
  • the panel 101 may also be provided with a USB interface, and the USB interface is connected to the power supply device, and can connect a signal reading device or receive external electric energy to charge the power supply device.
  • the positioning module is a base station positioning terminal
  • a mobile phone card is provided in the positioning module.
  • a communication module is added to the base 102, and a physical button and a speaker are added to the panel 101 to connect the two with the communication module. Electric connection can also realize the call function.
  • a groove portion is provided on the side of the base 102 away from the panel 101, the groove portion forms an accommodation space 104, and the accommodation space 104 is configured as storage.
  • a side of the base 102 away from the panel 101 is recessed to form an accommodation space 104.
  • the accommodation space 104 can store learning supplies such as pens, rulers, erasers, and compasses, and can also be configured to store copy works or reference pictures.
  • a cover 103 is provided on the opening of the accommodating space 104, and the cover 103 is detachably connected to the edge of the opening of the accommodating space 104, and the cover 103 There are scales and geometric hollow patterns on it.
  • a male buckle is provided on the cover 103 of the base 102
  • a female buckle is provided on the edge of the accommodating space 104, and the male buckle and the female buckle can be buckled with each other.
  • a first magnet is provided in the accommodating space 104
  • a second magnet is provided on the cover 103, and the interaction between the first magnet and the second magnet enables the cover 103 to be detachably adsorbed in the accommodating space.
  • the opening of the space 104 is provided in the accommodating space 104.
  • scales are provided on the surface of the cover plate 103 on the side facing away from the accommodating space 104.
  • the scales are provided on both sides of the length direction of the surface of the cover plate 103.
  • One side of the scale is a millimeter scale, and the other The side scale is an inch scale, so that the cover plate 103 can be used as a ruler; the hollow geometric pattern on the surface of the cover plate 103 can be used as a template for the user to depict geometric figures.
  • the cover plate 103 is a transparent plate, and the internal situation of the accommodating space 104 can be observed through the cover plate 103.
  • an electronic clock 5 is further arranged inside the main body 1, and the display screen of the electronic clock 5 is embedded on the surface of the panel 101 facing away from the base 102.
  • the user can intuitively see the time displayed by the electronic clock 5 and control the writing and drawing progress.
  • the electronic clock 5 can adopt a common LCD clock module, which will not be repeated here.
  • a control module 3 is further included.
  • the control module 3 is arranged in the main body 1, and the control module 3 is electrically connected with the flexible liquid crystal handwriting module 2 and the positioning module, respectively.
  • control module 3 can control the flexible liquid crystal handwriting module 2 and the positioning module to work normally, so that the position information located by the positioning module can be displayed on the control terminal or the mobile terminal.
  • control module 3 is also connected with a communication module.
  • the communication module may be a 3G, 4G, 5G, WiFi communication module or other radio frequency communication module.
  • control module 3 is a single-chip microcomputer, ARM, or other controller capable of realizing corresponding functions, which can be fully understood by those skilled in the art.
  • the multifunctional liquid crystal handwriting board further includes an alarm module 6.
  • the alarm module 6 is arranged in the body 1, and the alarm module 6 is electrically connected to the control module 3.
  • the control module 3 can control the alarm module 6 to issue an alarm and send the alarm signal generated by it To the terminal.
  • a certain range of predetermined positions is preset for the positioning module.
  • the alarm module 6 When the user is far away from the predetermined position, the alarm module 6 generates an alarm signal, and the control module 3 controls the alarm module 6 to send the alarm signal to the bound terminal ,
  • the user’s location information can be checked through the terminal, especially for students.
  • the alarm module 6 When the child is far away from the predetermined location, the alarm module 6 will issue an alarm to remind the student that the student is beyond the predetermined location range. Parents can also learn about the situation in time to avoid accidents such as the child’s loss. When class is late, parents can also check the child's location at any time.
  • the multifunctional liquid crystal handwriting tablet may further include a communication module configured to perform wireless communication with the server to send the location information obtained by the positioning module to the server, so that the server can The location information is sent to the corresponding terminal, or the server determines whether the multifunctional liquid crystal handwriting tablet is located in the set area according to a preset time detection strategy or location detection strategy, and sends an alarm to the terminal according to the detection result.
  • a communication module configured to perform wireless communication with the server to send the location information obtained by the positioning module to the server, so that the server can The location information is sent to the corresponding terminal, or the server determines whether the multifunctional liquid crystal handwriting tablet is located in the set area according to a preset time detection strategy or location detection strategy, and sends an alarm to the terminal according to the detection result.
  • the terminal may be a mobile phone, a tablet computer, a personal computer, etc., of course, it is not limited to this.
  • an APP developed for the multifunctional LCD handwriting board can be downloaded on the mobile phone, and the alarm signal generated by the alarm module 6 is sent to the APP directly or through a server, and parents can intuitively view the alarm signal and location information through the APP.
  • the fall trigger module 7 also includes a fall trigger module 7; the fall trigger module 7 is arranged inside the body 1 and is electrically connected to the alarm module 6; the fall trigger module 7 includes a shrapnel 702 and a conducting portion 701, when The shrapnel 702 can shift relative to the conducting portion 701 and contact the conducting portion 701 when receiving the shock, and can trigger the circuit of the alarm module 6 to be turned on and send an alarm signal to the terminal.
  • the conductive portion 701 is wrapped on the outside of the elastic piece 702, and a predetermined distance is set between the elastic piece 702 and the conductive portion 701.
  • the maximum offset distance of the elastic piece 702 is greater than the predetermined distance, and the conductive portion 701 passes
  • the first wire is electrically connected to the alarm module 6, and the shrapnel 702 is electrically connected to the alarm module 6 through the second wire.
  • the shrapnel 702 is greatly shaken and the offset distance is not less than the preset distance.
  • the conduction part 701 contacts to conduct the circuit, and the alarm module 6 generates a fall alarm signal and sends it to the mobile phone APP. Parents can know the situation in time and take countermeasures, especially for students in remote mountainous areas.
  • a water flow channel is provided on the main body 1, and the water flow channel is in communication with the fall trigger module 7.
  • the body 1 falls into the water, the water flows between the elastic piece 702 and the conducting portion 701 through the water flow channel, so that the elastic piece 702 and the conducting portion 701 are connected.
  • the space between the shrapnel 702 and the conducting part 701 is filled with water, triggering the circuit of the alarm module 6 to be turned on, and the alarm signal is sent to the mobile phone APP, so that parents can know the situation and Take countermeasures.
  • the fall trigger module may include a multi-axis accelerometer.
  • the multi-axis accelerometer is electrically connected to the control module, and the control module triggers the multi-axis accelerometer when the multi-axis accelerometer detects that the acceleration of the multi-function liquid crystal tablet complies with a preset fall feature
  • the alarm module issues corresponding alarms.
  • a water immersion sensor may also be provided on the outside of the body 1.
  • the water immersion sensor is electrically connected to the alarm module, and is configured to call the alarm module to issue a corresponding alarm when detecting that the body 1 falls into the water.
  • the water immersion sensor may be a contact type water immersion sensor.
  • the energy supply device 4 is a lithium battery, which is light in weight and has a high storage energy density to ensure the endurance time.
  • the energy supply device 4 is not limited to a lithium battery.
  • this embodiment also provides a multifunctional liquid crystal handwriting tablet monitoring system.
  • the system includes a server 200 and the multifunctional liquid crystal handwriting tablet 100 provided by this embodiment.
  • the multifunctional liquid crystal handwriting board 100 wirelessly communicates with the server 200, and sends the position information obtained by the positioning module to the server 200.
  • the server 200 also communicates with the terminal 300, and sends the location information or alarm information generated according to the location information to the terminal 300.
  • the server 300 may also be configured to determine whether the location information is located in a set area according to a preset time detection strategy or location detection strategy, and send an alarm to the terminal according to the detection result.
  • the multifunctional liquid crystal handwriting board includes: a main body, a flexible liquid crystal handwriting module, a positioning module, and an energy supply device; wherein the flexible liquid crystal handwriting module is embedded on the surface of the main body, and the main body can effectively perform the flexible liquid crystal handwriting module.
  • the user can use the flexible liquid crystal handwriting module as electronic draft paper for writing and drawing, which can be repeatedly erased and written, and has good environmental protection characteristics;
  • the positioning module and the energy supply device are arranged inside the body, and the positioning module and the flexible liquid crystal
  • the handwriting module is electrically connected to the energy supply device, so that the power supply device can provide power to the positioning module and the flexible liquid crystal handwriting module, ensuring that the positioning module and the flexible liquid crystal handwriting module can be powered on.
  • an independent receiving slot can be provided in the body.
  • the positioning module can identify the user's position information, locate the user, and prevent the user from getting lost, especially suitable for Younger children.
  • the multifunctional liquid crystal handwriting board provided in this embodiment can be repeatedly erased and used as electronic draft paper, which ensures the convenience and environmental protection of the handwriting board, and also adds positioning and storage functions, especially suitable for younger people. Children can locate and recognize their location information to avoid getting lost.
  • the function is diverse and has strong practicability.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Position Input By Displaying (AREA)

Abstract

L'invention concerne une tablette d'écriture manuscrite à cristaux liquides multifonction, associé au domaine technique des dispositifs électroniques. La tablette d'écriture manuscrite à cristaux liquides multifonction comprend : un corps (1), un module d'écriture manuscrite à cristaux liquides (2) flexible, un module de positionnement et un dispositif d'alimentation électrique (4). Le module d'écriture manuscrite à cristaux liquides (2) flexible est intégré à la surface du corps (1). Le module de positionnement et le dispositif d'alimentation électrique (4) sont disposés à l'intérieur du corps (1), et, le module de positionnement et le module d'écriture manuscrite à cristaux liquides (2) flexible sont électriquement connectés au dispositif d'alimentation électrique (4). Il est possible d'effacer et d'écrire de manière répétée sur la tablette d'écriture manuscrite à cristaux liquides multifonction de sorte qu'elle serve de papier brouillon électronique, ce qui permet de garantir la commodité et la convivialité de la tablette d'écriture manuscrite, et fournit en outre une fonction de positionnement et une fonction de stockage, est particulièrement applicable à un jeune enfant, permet le positionnement et l'identification d'informations de position de ce dernier, l'empêche de se perdre, présente diverses fonctions, et est très pratique.
PCT/CN2019/116278 2019-05-16 2019-11-07 Tablette d'écriture manuscrite à cristaux liquides multifonction et système de surveillance WO2020228268A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201920716522.XU CN209525642U (zh) 2019-05-16 2019-05-16 多功能液晶手写板
CN201920716522.X 2019-05-16

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Publication Number Publication Date
WO2020228268A1 true WO2020228268A1 (fr) 2020-11-19

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209525642U (zh) * 2019-05-16 2019-10-22 何海洋 多功能液晶手写板

Citations (6)

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Publication number Priority date Publication date Assignee Title
CN203386119U (zh) * 2013-07-24 2014-01-08 广州兆威电子科技开发有限公司 一种电感式触控的平板电脑
US20160014264A1 (en) * 2014-07-14 2016-01-14 Lg Electronics Inc. Mobile terminal and control method for the mobile terminal
CN105339877A (zh) * 2013-07-04 2016-02-17 索尼公司 用于移动装置的触摸屏上的手指检测
CN108769381A (zh) * 2018-04-27 2018-11-06 Oppo广东移动通信有限公司 显示控制方法及装置
CN109564489A (zh) * 2018-10-12 2019-04-02 深圳柔显系统技术有限公司 触控面板及触控装置
CN209525642U (zh) * 2019-05-16 2019-10-22 何海洋 多功能液晶手写板

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105339877A (zh) * 2013-07-04 2016-02-17 索尼公司 用于移动装置的触摸屏上的手指检测
CN203386119U (zh) * 2013-07-24 2014-01-08 广州兆威电子科技开发有限公司 一种电感式触控的平板电脑
US20160014264A1 (en) * 2014-07-14 2016-01-14 Lg Electronics Inc. Mobile terminal and control method for the mobile terminal
CN108769381A (zh) * 2018-04-27 2018-11-06 Oppo广东移动通信有限公司 显示控制方法及装置
CN109564489A (zh) * 2018-10-12 2019-04-02 深圳柔显系统技术有限公司 触控面板及触控装置
CN209525642U (zh) * 2019-05-16 2019-10-22 何海洋 多功能液晶手写板

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