CN109901331A - Liquid crystal handwriting pad and liquid crystal tablet system - Google Patents

Liquid crystal handwriting pad and liquid crystal tablet system Download PDF

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Publication number
CN109901331A
CN109901331A CN201910212286.2A CN201910212286A CN109901331A CN 109901331 A CN109901331 A CN 109901331A CN 201910212286 A CN201910212286 A CN 201910212286A CN 109901331 A CN109901331 A CN 109901331A
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China
Prior art keywords
liquid crystal
diaphragm
control panel
handwriting pad
primary diaphragm
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CN201910212286.2A
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Chinese (zh)
Inventor
叶文新
刘伟
罗浩
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Shenzhen Hengkaiyuan Electronics Co Ltd
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Shenzhen Hengkaiyuan Electronics Co Ltd
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Priority to CN201910212286.2A priority Critical patent/CN109901331A/en
Publication of CN109901331A publication Critical patent/CN109901331A/en
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Abstract

The invention discloses a kind of liquid crystal handwriting pads, including shell, the hand-written film of liquid crystal, antenna plate and control panel, the hand-written film of the liquid crystal, antenna plate and control panel are all set in shell, which is set between the hand-written film of liquid crystal and control panel and antenna plate and the hand-written film of liquid crystal are electrically connected with control panel respectively;The hand-written film of the liquid crystal includes primary diaphragm and secondary diaphragm, and the side that the primary diaphragm and secondary diaphragm are oppositely arranged and the two is opposite is each formed with conductive layer, is provided with layer of liquid crystal molecule between two conductive layers;The conductive layer of the primary diaphragm and secondary diaphragm is each split into the strips of conductive region of several mutually insulateds, the distribution mutually parallel along the first direction of each strips of conductive region of the primary diaphragm and equal extraction electrode, each strips of conductive region of the secondary diaphragm be parallel to each other in a second direction distribution and equal extraction electrode, electrode is connect with control panel, wherein, first direction is mutually perpendicular to second direction.The invention also discloses a kind of liquid crystal tablet systems.

Description

Liquid crystal handwriting pad and liquid crystal tablet system
Technical field
The present invention relates to liquid crystal writing technical field more particularly to a kind of liquid crystal handwriting pads and liquid crystal tablet system.
Background technique
Handwriting pad be it is a kind of be able to satisfy user write require product, have portable, writing show clearly and can be repeatedly The advantages that writing.When writing, user can make the liquid crystal in handwriting pad by applying certain pressure, pressure to handwriting pad Molecule deflects, and liquid crystal molecule is made to show different colors, to achieve the effect that handwriting pad is made to show writing.
, need to be by applying voltage to handwriting pad when user needs to wipe the written contents on handwriting pad, voltage generates electricity , the liquid crystal molecule in handwriting pad can deflect in the electric field and be restored to order state, to eliminate the book on handwriting pad Write mark.In the prior art, the problem of mostly using a key to remove all writings, cannot achieve selective erase, meanwhile, it is traditional The written contents of handwriting pad can not be saved directly, shooting preservation need to be carried out by mobile phone or picture pick-up device, but shoot the effect saved Fruit is easy to be influenced by environmental factors such as light, and cumbersome, so that the development of handwriting pad is subject to certain restrictions.
In consideration of it, it is necessary to provide the liquid crystal with selective erase and store function that one kind can solve drawbacks described above is hand-written Plate and liquid crystal tablet system with realize written contents storage and can handwriting on selective erase handwriting pad, improve user Experience, it is practical.
Summary of the invention
The technical problems to be solved by the invention provide a kind of liquid crystal handwriting pad with selective erase and store function and Liquid crystal tablet system with realize written contents storage and can handwriting on selective erase handwriting pad, improve user's body It tests, it is practical.
In order to solve the above technical problems, the present invention is using technical solution as described below: a kind of liquid crystal handwriting pad includes The hand-written film of shell, liquid crystal, antenna plate and control panel, the hand-written film of the liquid crystal, antenna plate and control panel are all set in the shell It is interior, the antenna plate be set between the hand-written film of the liquid crystal and control panel and the antenna plate and the hand-written film of liquid crystal respectively with institute State control panel electric connection, the loop coil that the antenna plate includes substrate and is distributed on the substrate in length and breadth, to receive Signal is simultaneously transmitted to control panel;The hand-written film of liquid crystal include primary diaphragm and be oppositely arranged with the primary diaphragm second Diaphragm, the primary diaphragm and the opposite side of secondary diaphragm are each formed with conductive layer, the primary diaphragm and secondary diaphragm Layer of liquid crystal molecule is provided between conductive layer;The conductive layer of the primary diaphragm and secondary diaphragm is each split into several mutually The strips of conductive region of insulation, each strips of conductive region of the primary diaphragm is mutually parallel along the first direction to be distributed and draws There is electrode, each strips of conductive region of the secondary diaphragm is parallel to each other in a second direction to be distributed and lead to electrode, described Electrode is connect with control panel, wherein first direction is spatially mutually perpendicular to interlock with second direction.
Its further technical solution are as follows: the primary diaphragm is set to the top of the secondary diaphragm, the primary diaphragm Bottom surface of the conductive layer as the primary diaphragm, top surface of the conductive layer of the secondary diaphragm as the secondary diaphragm.
Its further technical solution are as follows: the primary diaphragm and secondary diaphragm include PET film layer, the primary diaphragm PET film layer be set to the primary diaphragm conductive layer upper surface, the PET film layer of the secondary diaphragm is set to described The lower surface of the conductive layer of two diaphragms and bottom surface as secondary diaphragm.
Its further technical solution are as follows: the primary diaphragm further includes matcoveredn, and the protective layer is set to described The upper surface of the PET film layer of one diaphragm and top surface as the primary diaphragm.
Its further technical solution are as follows: the liquid crystal handwriting pad further includes having battery, and the battery is set to the shell It is interior and connect respectively with the electrode and control panel, to provide working power for it.
Its further technical solution are as follows: the control panel includes multiplexer channel switching chip and power switching chip, institute Multiplexer channel switching chip is stated to connect with each electrode, to control the short circuit of counter electrode, the power switching chip respectively with institute Battery and the connection of each electrode are stated, to control voltage output to corresponding electrode.
Its further technical solution are as follows: the control panel includes MCU, bluetooth template, operational amplification circuit, all erasing Switching circuit and selective erase switching circuit, the MCU are electric with operational amplification circuit, bluetooth module, whole erasing switches respectively Road and the connection of selective erase switching circuit, to carry out job control;The bluetooth module is for carrying out Bluetooth communication to transmit book Content is write, the operational amplification circuit is used to carry out the signal received operation amplifier processing, all erasings switch electricity Road and selective erase switching circuit are respectively used to control the progress of all erasing and selective erase.
In order to solve the above-mentioned technical problem, the invention also discloses a kind of liquid crystal tablet systems, include above-mentioned liquid Brilliant handwriting pad and writing pen, the writing pen include shell, nib, erasing key, movable component and pcb board, the activity group Part and pcb board are set in the shell, and the erasing key is set on the shell and connect with the pcb board, the shell The both ends open of body, the nib is set to the opening of described shell one end, and is connected by the movable component and pcb board It connects.
Its further technical solution are as follows: the writing pen further includes having core inductance, one end of the core inductance and pen Head connection, the other end is connect by the movable component with pcb board, to generate electromagnetic signal.
Its further technical solution are as follows: the pcb board includes LC oscillating circuit to control the frequency of electromagnetic signal.
The beneficial technical effect of the present invention lies in: the liquid crystal handwriting pads by by the hand-written film of liquid crystal, antenna plate and control The combination of plate can carry out control processing according to the electromagnetic signal of the hand-written film of the liquid crystal received, realize and write, store and wipe behaviour Make, by the way that the primary diaphragm of the hand-written film of liquid crystal and secondary diaphragm to be divided into the strips of conductive region of mutually insulated respectively and drawn There is electrode, and the strips of conductive region of primary diaphragm and secondary diaphragm is mutually perpendicular to interlock, antenna plate is received in conjunction with control panel To signal be analyzed and processed, to position, to be stored to handwriting;Meanwhile using control panel to each heavy The voltage in folded strips of conductive region controls, and the accurate erasing for carrying out regional area, whole can only be realized by overcoming traditional technology The deficiency of erasing improves the accuracy of selective erase, is conducive to the working efficiency and usage experience that improve user, improves liquid crystal hand Write the commercial value of plate.The liquid crystal tablet system is by being arranged writing pen matched with the liquid crystal handwriting pad to send electricity Magnetic signal realizes writing function, store function and selective erase function, and movable component is arranged in writing pen according to writing pen With whether the contact of liquid crystal handwriting pad and closing or opening and the connection of pcb board are securely and reliably led to the work for controlling pcb board The switching of writing function He erasing function can be realized by crossing setting erasing key, easy to operate, practical.
Detailed description of the invention
Fig. 1 is the decomposition texture schematic diagram of liquid crystal handwriting pad of the present invention.
Fig. 2 is the primary diaphragm of the hand-written film of liquid crystal of liquid crystal handwriting pad of the present invention and the structural schematic diagram of secondary diaphragm.
Fig. 3 is the structural schematic diagram of the film layer of liquid crystal handwriting pad of the present invention.
Fig. 4 is the decomposition texture schematic diagram of the writing pen of liquid crystal tablet system of the present invention.
Specific embodiment
To make those skilled in the art that the object, technical solutions and advantages of the present invention be more clearly understood, with Under the present invention is further elaborated in conjunction with the accompanying drawings and embodiments.
Referring to Fig.1, in the present embodiment, the liquid crystal handwriting pad 10 includes shell 110, the hand-written film 120 of liquid crystal, antenna Plate 130 and control panel 140.The hand-written film 120 of the liquid crystal, antenna plate 130 and control panel 140 are all set in the shell 110, The antenna plate 130 is set between the hand-written film 120 of the liquid crystal and control panel 140, and the antenna plate 130 and liquid crystal are hand-written Film 120 is electrically connected with the control panel 140 by conducting wire respectively, and the antenna plate 130 includes substrate and is distributed in length and breadth Loop coil on the substrate, to receive signal and be transmitted to control panel 140.Specifically, the antenna plate 130 receives Signal be electromagnetic signal, the intensity for the electromagnetic signal that the control panel 140 can be received according to antenna plate 130 judges to write Position, and after locking writing position, operation amplifier processing and digital conversion process are carried out to obtain to the electromagnetic signal received Written contents are taken, to store written contents.The loop coil is adhered on the substrate, and material is organic copper Foil, it is preferable that the liquid crystal handwriting pad 10 further includes having a radiation shield shield plate 131, and the hand-written film 120 of liquid crystal is located at the day The front of line plate 130, the radiation shield shield plate 131 invest the back side of the antenna plate 130, to prevent the back side of antenna plate 130 By external electromagnetic interference, the 130 received electromagnetic signal amplitude in front of antenna plate is improved, 140 job control of control panel is improved Accuracy.
Specifically, the shell 110 includes upper cover 111 and lower cover 112, and the material of the upper cover 111 and lower cover 112 is equal For plastics, a socket placed for the hand-written film 120 of the liquid crystal is formed in the upper cover 111, the antenna plate 130 is arranged In the lower section of the liquid crystal writing film 120.
In conjunction with Fig. 2, the hand-written film 120 of liquid crystal includes primary diaphragm 121 and is oppositely arranged with the primary diaphragm 121 Secondary diaphragm 122, the primary diaphragm 121 and the opposite side of secondary diaphragm 122 are each formed with conductive layer, respectively first Conductive layer 1211 and the second conductive layer 1221 are provided with liquid crystal point between first conductive layer 1211 and the second conductive layer 1221 Sublayer 123, the layer of liquid crystal molecule 123 are set between the primary diaphragm 121 and secondary diaphragm 122.The primary diaphragm If the 121 conductive layer i.e. conductive layer of the first conductive layer 1211 and secondary diaphragm 122 i.e. the second conductive layer 1221 is each split into The strips of conductive region of dry mutually insulated, it is preferable that in the present embodiment, each strips of conductive area of the primary diaphragm 121 Domain is transversely arranged in parallel and leads to electrode 1201, and each strips of conductive region of the secondary diaphragm 122 is along longitudinal direction Arranged in parallel and lead to electrode 1201, the electrode 1201 is connect with control panel 140.The primary diaphragm 121 The strips of conductive region of conductive layer, layer of liquid crystal molecule 123 and secondary diaphragm 122 the strips of conductive region of conductive layer weigh jointly Folded part is that can clash region.Certainly, in some embodiments, the strips of conductive region of the primary diaphragm 121 is along longitudinal direction It is parallel to each other and is distributed and leads to electrode 1201, correspondingly, the strips of conductive region of the secondary diaphragm 122 is transversely mutual Parallelly distribute on and electrode 1201 is led to, remaining structure and function is identical as the present embodiment.In other embodiments, described The strips of conductive region of primary diaphragm 121 is mutually parallel along the first direction to be distributed and leads to electrode 1201, second film The strips of conductive region of piece 122 along and the first direction be mutually perpendicular to staggered second direction and be parallel to each other distribution and draw There is electrode 1201, remaining structure and function is identical as the present embodiment.
With continued reference to Fig. 1, the control panel 140 is set in the lower cover 112 and the with the hand-written film 120 of the liquid crystal Each electrode 1201 of one diaphragm 121 and secondary diaphragm 122 connection, it is preferable that the liquid crystal handwriting pad 10 further includes having battery 150, the battery 150 is set in the lower cover 112 of the shell 110, and the electrode 1201 and control panel 140 connect respectively It connects, to provide working power for it.Preferably, by described in a front baffle 113 fixation at the top of the hand-written film 120 of the liquid crystal Liquid crystal writing film 120 is in the socket of the upper cover 111.
With continued reference to Fig. 3, in the present embodiment, the primary diaphragm 121 is set to the top of the secondary diaphragm 122, Bottom surface of i.e. the first conductive layer 1211 of the conductive layer of the primary diaphragm 121 as the primary diaphragm 121, the secondary diaphragm Top surface of i.e. the second conductive layer 1221 of 122 conductive layer as the secondary diaphragm 122.Preferably, the primary diaphragm 121 and The conductive layer of secondary diaphragm 122 is ITO layer, then the first conductive layer 1211 and the second conductive layer 1221 are ITO layer, wherein ITO represents tin indium oxide.Certainly, in other embodiments, first conductive layer 1211 and the second conductive layer 1221 can be used The materials such as conducting polymer, nano-silver thread, graphene, carbon nanotube are made, remaining structure and function is identical as the present embodiment.
Specifically, the primary diaphragm 121 and secondary diaphragm 122 include PET film layer, respectively the first PET film layer 1212 and the second PET film layer 1222, the first PET film layer 1212 be set to conductive layer i.e. first of the primary diaphragm 121 The upper surface of conductive layer 1211, the conductive layer i.e. second that the second PET film layer 1222 is set to the secondary diaphragm 122 are conductive The lower surface of layer 1221 and bottom surface as the secondary diaphragm 122.Preferably, described in the first PET film layer 1212 corresponds to Each strips of conductive region of primary diaphragm 121, which is cut, is formed with the region strip PET, described in the correspondence of the second PET film layer 1222 Secondary diaphragm 122 each strips of conductive region cutting be formed with the region strip PET, specifically, the first PET film layer 1212 and Second PET film layer 1222 is pre-cutting state.Wherein, the pre-cutting status representative does not completely cut through state, can keep liquid Brilliant hand-written 120 surface of film it is smooth, improve the fluency of writing.PET represents polyethylene terephthalate, the PET film The PET material with impedance can be used in layer.
Specifically, in the present embodiment, the primary diaphragm 121 further includes matcoveredn 1213, the protective layer 1213 PET film layer positioned at the primary diaphragm 121 is the upper surface of the first PET film layer 1212 and as the primary diaphragm 121 Top surface.Preferably, the protective layer 1213 is AG layers, and AG representative resists dizzy protective film, and AG uses three-decker, and superficial layer is frosted Layer can effectively resist fingerprint invasion, and finger touch is not easy trace, even if leaving sweat, spot, only need to gently be smeared with hand can be clear Reason, utmostly ensure that the visual effect on hand-written 120 surface of film of liquid crystal.But also strong dazzle can be effectively eliminated, described in raising The outdoor use of liquid crystal handwriting pad 10 can be appropriate.Simultaneously can height anti-scratch, and touch-control is sensitive, can also prevent ultraviolet light and infrared Line penetrates, and effectively improves the anti-pressure ability of the hand-written film 120 of liquid crystal, extends its working life.
Specifically, be provided with function button in the upper cover 111 of the shell 110, the function button with control panel 140 Connection, the function button includes bluetooth transmission key and removes key, to realize the bluetooth transmission of written contents and remove.It is excellent Selection of land, the control panel 140 includes MCU, bluetooth module, operational amplification circuit, all erasing switching circuit and selective erase are opened Powered-down road, the MCU wipe switching circuit and local switch circuit connection with operational amplification circuit, bluetooth module, whole respectively, To carry out job control.Wherein, the operational amplification circuit is used to after carrying out operation amplifier processing to the signal received convey Carry out digital conversion process to MCU, realize the record storage of written contents, MCU can control bluetooth module carry out Bluetooth communication with It realizes and the written contents of record storage is sent to the external electronic devices such as computer, mobile phone or tablet computer, effectively to save Written contents.Prior art China patent can be used in all erasing switching circuit and the selective erase switching circuit Switching circuit and selective erase switching circuit are all wiped disclosed in CN108550349A, it is clear with the control respectively according to MCU Except with local erasing writing content, this is not repeated.All erasing switching circuits and removing are by key connection, to be pressed according to removing The closure of key, control MCU export corresponding voltage signal into the electrode 1201 of liquid crystal writing film 120, control liquid crystal molecule hair The raw removing deflected to realize written contents.
Specifically, the MCU of the control panel 140 can be analyzed and processed according to the electromagnetic signal that antenna plate 130 receives, Electromagnetic signal strength and amplitude are obtained, corresponding writing position is obtained according to the intensity of electromagnetic signal, is sentenced according to electromagnetic signal amplitude Break to write operation or erasing operation, when judging result is to write operation, then the operational amplification circuit of MCU control is to receiving Electromagnetic signal carry out operation amplifier processing, receive amplified electromagnetic signal and carry out digital conversion process, with obtain write Content, and stored;When judging result is erasing operation, according to judge that processing result sends corresponding electric signal to corresponding electric Pole 1201 is deflected with the liquid crystal molecule for controlling the corresponding position in corresponding strips of conductive region, realizes the function of selective erase. The MCU of the control panel 140 is prestored and is respectively used to control writing, storage, removes and the control program of selective erase function, with Job control is judged according to the frequency of the electromagnetic signal received, and sends corresponding control instruction.Meanwhile in conjunction with bluetooth mould The written contents being stored in MCU can be transmitted to external electronic device via bluetooth module by block, and the external electronic device can It is practical for mobile phone, computer and storage medium with bluetooth module etc., and it can be released effectively the memory space of MCU, it improves The working efficiency of MCU.Preferably, the control panel 140 further includes having multiplexer channel switching chip and power switching chip, described Multiplexer channel switching chip is connect with each electrode 1201, to control the short circuit of counter electrode 1201, the power switching chip point It is not connect with the battery 150 and each electrode 1201, to control voltage output to corresponding electrode 1201, wherein the multichannel Multichannel integrated analog switch chip can be used in channel switching chip and power switching chip, such as 64 path analoging switch chips TP0164.When work, control panel 140 detects each loop coil by the signal of the acquisition of the loop coil of receiving antenna plate 130 Signal strength, due to distance more far field intensity it is weaker, to realize accurate positioning, and due to the multiple pass of control panel 140 Road switching chip is connect with MCU, can control the short circuit of the electrode 1201 in addition to corresponding position;Power switching chip is connect with MCU, To control the power supply of electrode 1201 for corresponding position, realizes and be accurately positioned, moreover, the MCU of the control panel 140 is according to acquisition The frequency of electromagnetic signal, judgement are to write signal or erasing signal to carry out obtaining for written contents if being judged as writing signal It takes and stores;When being judged as erasing signal, then controls power switching chip and exports corresponding level to counter electrode 1201, In, the MCU, which is prestored, writes signal and the erasing corresponding frequency range of signal and corresponding output level amplitude, the writing The frequency of signal can be 170KHz, and the frequency for wiping signal is 180KHz.Preferably, in the present embodiment, the MCU control supplies Cutting changes the electrode that chip exports positive piezoelectric signal to the strips of conductive region being transversely distributed, and output negative pressure electric signal is to along vertical To the electrode in the strips of conductive region of distribution.
Referring to Fig. 4, liquid crystal tablet system of the present invention include above-mentioned liquid crystal handwriting pad 10 and it is matched use write Pen 20, the writing pen 20 are communicated to connect with liquid crystal handwriting pad 10, and the writing pen 20 includes shell 210, nib 220, wipes Except key 230, movable component 240 and pcb board 270, the movable component 240 and pcb board 270 are set in the shell 210, institute It states erasing key 230 to be set on the shell 210 and connect with the pcb board 270, the both ends open of the shell 210 is described Nib 220 is set to the opening of described 210 one end of shell, and is connect by the movable component 240 with the pcb board 270. Specifically, the shell 210 includes pen point casing 211 and Pen-holder sleeve 212, and the both ends of the pen point casing 211 and Pen-holder sleeve 212 are opened Mouthful, one end of the Pen-holder sleeve 212 and the connection of pen point casing 211, the other end seal Pen-holder sleeve 212 by a rear cover 213.Institute State that nib 220 is set in the pen point casing 211 and opening of the one end in described 211 one end of pen point casing is stretched out, the nib 220 other end is connect with pcb board 270 in passing through the movable component 240 in shell 210, the open end of the Pen-holder sleeve 212 It is socketed with the opening of 211 other end of pen point casing.
Specifically, the movable component 240 includes piston 241 and spring 242, the piston 241, spring 242 and described Pcb board 270 is sequentially arranged in a bracket 260, and the writing pen 20 further includes having core inductance 250, described written 220 The other end is placed in the pen point casing 211, and is connect with one end of the core inductance 250, the core inductance 250 it is another End is connect by the movable component 240 with pcb board, to generate electromagnetic signal.The core inductance 250 is connected to the nib Between 22 and the piston 241 of movable component 240, the protrusion for compressing the spring 242, institute are formed on the piston 241 It states spring 242 to be sheathed on the end of the one end of the piston 241 close to pcb board 270, one end is supported with described 241 protrusion It connecing, the other end is abutted with pcb board 270, and with the compression by spring 242 piston 241 is contacted with pcb board 270, so that Pcb board 270 works, to realize the writing and erasing of liquid crystal handwriting pad 10.Wherein, the company of the core inductance 250 and piston 241 The settable spacer 251 in the place of connecing is to protect the normal work of core inductance 250.Preferably, the writing pen 20 further includes having Power supply 272 and switch 271, the pcb board 270 include LC oscillating circuit to control the frequency of electromagnetic signal, the switch 271 It is set on the pcb board 270, the LC oscillating circuit is connect by the switch 271 and conducting wire 273 with power supply 272, described Switch 271 is set to the contact jaw of the piston 241 and pcb board 270, to be closed according to the 272 of spring 241 contacts, controls The LC oscillating circuit of pcb board 270 works.Using the characteristic of spring 242, when writing pen 20 is not contacted with liquid crystal board 10, bullet Spring 242 restores long to original from compressive state, piston 241 do not contacted with pcb board 270 and the core inductance 250 not with the PCB Plate 270 contacts, and switch 271 disconnects, and LC oscillating circuit open circuit does not work.
Based on above-mentioned design, when work, writing pen is contacted with liquid crystal handwriting pad, due to the bullet of the movable component in writing pen Spring, the inwardly activity of the nib of writing pen, nib drive core inductance to do the movement of compressed spring by spacer, piston, with Switch contact on pcb board, so that closing the switch, the power supply of pcb board provides working power, LC oscillating circuit for LC oscillating circuit Work output electromagnetic signal, and electromagnetic signal is sent to liquid crystal handwriting pad, the antenna plate of liquid crystal handwriting pad via core inductance Loop coil receive electromagnetic signal and according to the electromagnetic signal transmission that receives to the MCU of control panel, the MCU is according to acquisition The intensive analysis processing of electromagnetic signal obtain corresponding position, control multiplexer channel switching chip controls are in addition to counter electrode Electrode is shorted, meanwhile, signal type, the corresponding electricity of control power switching chip output are judged according to the signal that LC oscillating circuit exports Open width value is realized so that the liquid crystal molecule of the corresponding position of counter electrode deflects to counter electrode and writes or wipe;Erasing When, user need to press erasing key and write again, and writing pen in needing the region of erasing to be described on liquid crystal handwriting pad, wipe by pressing When except key, pcb board receives the signal of erasing key, and it is to wipe the electromagnetic signal of signal that control LC oscillating circuit, which sends frequency,;Book When writing, without pressing erasing key, the frequency of the electromagnetic signal of the LC oscillating circuit output is to write signal.
In conclusion liquid crystal handwriting pad of the present invention is by by the combination of liquid crystal hand-written film, antenna plate and control panel, it can basis The electromagnetic signal of the hand-written film of the liquid crystal received carries out control processing, realizes book write and erase operation, by by the hand-written film of liquid crystal Primary diaphragm and secondary diaphragm be divided into the strips of conductive region of mutually insulated respectively and lead to electrode, and primary diaphragm and The strips of conductive region of secondary diaphragm is mutually perpendicular to interlock, and analyzes in conjunction with control panel the electromagnetic signal that antenna plate receives Processing, to position, to be stored to written trace;Meanwhile using control panel to the strips of conductive region of each overlapping Voltage control, the accurate erasing for carrying out regional area, the deficiency all wiped can only be realized by overcoming traditional technology, meanwhile, The accuracy for improving selective erase is conducive to the working efficiency and usage experience that improve user, improves the business of liquid crystal handwriting pad Value;Meanwhile the control panel includes multiplexer channel switching chip and power switching chip to be accurately positioned, and improves the standard of erasing Written contents are stored to external electronic device moreover, can be realized using bluetooth module, improve user experience by true property.The present invention Liquid crystal tablet system by the way that matched with liquid crystal handwriting pad writing pen is arranged to send electromagnetic signal, realize writing function Can, store function and selective erase function, movable component is set in writing pen with connecing according to writing pen and liquid crystal handwriting pad Whether touching and closing or opening and the connection of pcb board securely and reliably can be real by setting erasing key with the work for controlling pcb board Existing writing function and the switching for wiping function, it is easy to operate, it is practical.
The above description is only a preferred embodiment of the present invention, rather than does limitation in any form to the present invention.This field Technical staff can impose various equivalent changes and improvement, all institutes within the scope of the claims on the basis of the above embodiments The equivalent variations or modification done, should all fall under the scope of the present invention.

Claims (10)

1. a kind of liquid crystal handwriting pad, which is characterized in that the liquid crystal handwriting pad include shell, the hand-written film of liquid crystal, antenna plate and Control panel, the hand-written film of the liquid crystal, antenna plate and control panel are all set in the shell, and the antenna plate is set to the liquid Between brilliant hand-written film and control panel, and the antenna plate and the hand-written film of liquid crystal are electrically connected with the control panel respectively, the day The loop coil that line plate includes substrate and is distributed on the substrate in length and breadth, to receive signal and be transmitted to control panel;
The hand-written film of liquid crystal includes primary diaphragm and the secondary diaphragm that is oppositely arranged with the primary diaphragm, first film Piece and the opposite side of secondary diaphragm are each formed with conductive layer, are provided between the primary diaphragm and the conductive layer of secondary diaphragm Layer of liquid crystal molecule;The conductive layer of the primary diaphragm and secondary diaphragm is each split into the strips of conductive area of several mutually insulateds Domain, the distribution mutually parallel along the first direction of each strips of conductive region of the primary diaphragm and leads to electrode, and described second Each strips of conductive region of diaphragm is parallel to each other in a second direction is distributed and leads to electrode, and the electrode connects with control panel It connects, wherein first direction is spatially mutually perpendicular to interlock with second direction.
2. liquid crystal handwriting pad as described in claim 1, which is characterized in that the primary diaphragm is set to the secondary diaphragm Top, bottom surface of the conductive layer of the primary diaphragm as the primary diaphragm, described in the conductive layer of the secondary diaphragm is used as The top surface of secondary diaphragm.
3. liquid crystal handwriting pad as claimed in claim 2, which is characterized in that the primary diaphragm and secondary diaphragm include PET film layer, the PET film layer of the primary diaphragm are set to the upper surface of the conductive layer of the primary diaphragm, the secondary diaphragm PET film layer be set to second film layer conductive layer lower surface and bottom surface as the secondary diaphragm.
4. liquid crystal handwriting pad as claimed in claim 3, which is characterized in that the primary diaphragm further includes matcoveredn, described Protective layer is set to the upper surface of the PET film layer of the primary diaphragm and the top surface as the primary diaphragm.
5. liquid crystal handwriting pad as described in claim 1, which is characterized in that the liquid crystal handwriting pad further includes having battery, described Battery is set in the shell and connect respectively with the electrode and control panel, to provide working power for it.
6. liquid crystal handwriting pad as claimed in claim 5, which is characterized in that the control panel includes multiplexer channel switching chip And power switching chip, the multiplexer channel switching chip is connect with each electrode, to control the short circuit of counter electrode, the power supply Switching chip is connect with the battery and each electrode respectively, to control voltage output to corresponding electrode.
7. liquid crystal handwriting pad as described in claim 1, which is characterized in that the control panel includes MCU, bluetooth module, fortune Calculate amplifying circuit, all erasing switching circuit and selective erase switching circuit, the MCU respectively with operational amplification circuit, bluetooth Module, all erasing switching circuit and the connection of selective erase switching circuit, to carry out job control;The bluetooth module be used for into To transmit written contents, the operational amplification circuit is used to carry out operation amplifier processing to the signal received row Bluetooth communication, All erasing switching circuit and the selective erase switching circuit are respectively used to control the progress of all erasing and selective erase.
8. a kind of liquid crystal tablet system, which is characterized in that the liquid crystal tablet system includes the claims 1 to 7 Liquid crystal handwriting pad and writing pen described in one, the writing pen and liquid crystal handwriting pad communicate to connect, and the writing pen includes Shell, nib, erasing key, movable component and pcb board, the movable component and pcb board are set in the shell, the erasing Key is set on the shell and connect with the pcb board, and the both ends open of the shell, the nib is set to the shell The opening of one end, and connect by the movable component with pcb board.
9. liquid crystal tablet system as claimed in claim 8, which is characterized in that the writing pen further includes having core inductance, One end of the core inductance is connect with nib, and the other end is connect by the movable component with pcb board, to generate electromagnetism letter Number.
10. liquid crystal tablet system as claimed in claim 8, which is characterized in that the pcb board include LC oscillating circuit with Control the frequency of electromagnetic signal.
CN201910212286.2A 2019-03-20 2019-03-20 Liquid crystal handwriting pad and liquid crystal tablet system Pending CN109901331A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110456578A (en) * 2019-08-13 2019-11-15 深圳市恒开源电子有限公司 Liquid crystal writing film and liquid crystal writing film processing method based on evaporation process
CN111025716A (en) * 2019-12-11 2020-04-17 珠海市益写科技有限公司 Intelligent liquid crystal writing board and control method
CN111312100A (en) * 2019-12-11 2020-06-19 珠海市益写科技有限公司 Large liquid crystal display screen and dimming control method
CN112305802A (en) * 2019-08-02 2021-02-02 江苏集萃智能液晶科技有限公司 Magnetic local erasing liquid crystal writing pad
WO2021179313A1 (en) * 2020-03-13 2021-09-16 好易写(深圳)科技有限公司 Liquid crystal writing film circuit structure, liquid crystal writing film, and liquid crystal writing tablet thereof
WO2023279765A1 (en) * 2021-07-07 2023-01-12 珠海市唯酷科技有限公司 Liquid-crystal handwriting film with function of partial erasure, and electronic writing device

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Publication number Priority date Publication date Assignee Title
CN112305802A (en) * 2019-08-02 2021-02-02 江苏集萃智能液晶科技有限公司 Magnetic local erasing liquid crystal writing pad
CN110456578A (en) * 2019-08-13 2019-11-15 深圳市恒开源电子有限公司 Liquid crystal writing film and liquid crystal writing film processing method based on evaporation process
CN111025716A (en) * 2019-12-11 2020-04-17 珠海市益写科技有限公司 Intelligent liquid crystal writing board and control method
CN111312100A (en) * 2019-12-11 2020-06-19 珠海市益写科技有限公司 Large liquid crystal display screen and dimming control method
WO2021179313A1 (en) * 2020-03-13 2021-09-16 好易写(深圳)科技有限公司 Liquid crystal writing film circuit structure, liquid crystal writing film, and liquid crystal writing tablet thereof
WO2023279765A1 (en) * 2021-07-07 2023-01-12 珠海市唯酷科技有限公司 Liquid-crystal handwriting film with function of partial erasure, and electronic writing device

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