CN109613735A - It is a kind of can selective erase liquid crystal blackboard - Google Patents

It is a kind of can selective erase liquid crystal blackboard Download PDF

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Publication number
CN109613735A
CN109613735A CN201910098097.7A CN201910098097A CN109613735A CN 109613735 A CN109613735 A CN 109613735A CN 201910098097 A CN201910098097 A CN 201910098097A CN 109613735 A CN109613735 A CN 109613735A
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CN
China
Prior art keywords
erasing
selective erase
liquid crystal
preset area
erasing part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910098097.7A
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Chinese (zh)
Inventor
何利民
张志城
郭腾跃
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SHENZHEN SCT OPTRONICS Co Ltd
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SHENZHEN SCT OPTRONICS Co Ltd
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 SHENZHEN SCT OPTRONICS Co Ltd filed Critical SHENZHEN SCT OPTRONICS Co Ltd
Priority to CN201910098097.7A priority Critical patent/CN109613735A/en
Publication of CN109613735A publication Critical patent/CN109613735A/en
Pending legal-status Critical Current

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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
    • 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
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention discloses it is a kind of can selective erase liquid crystal blackboard, comprising: liquid crystal display layer, including display surface, the liquid crystal display layer show corresponding image according to the received pressure touch track of display surface；Identification device wipes projected position and projected outline of the part in display surface for identification, generates selective erase signal when the projected outline of the erasing part is more than preset area；Erasing circuit, for carrying out image wipe to the corresponding display surface of the projected position according to the selective erase signal.The present invention, which realizes, wipes the regional area of written contents, and other regions are not influenced then by erasing, the deficiency all wiped can only be realized by overcoming traditional technology, improve the working efficiency and usage experience of user, improve the commercial value of liquid crystal blackboard and its application apparatus.

Description

It is a kind of can selective erase liquid crystal blackboard
Technical field
The present embodiments relate to liquid crystal technology, more particularly to it is a kind of can selective erase liquid crystal blackboard.
Background technique
The only full frame erasing of the liquid crystal blackboard of the prior art, cannot local wiping portion, write on liquid crystal blackboard in very much Rong Hou, if it find that wherein there is mistake at one, as soon as or write find after one section of formula it is intermediate there is an oeprator to wrongly write, Content written must be all wiped, writing again could correct, this causes great inconvenience to the use of liquid crystal blackboard, Influence the efficiency write.
Summary of the invention
The present invention provide it is a kind of can selective erase liquid crystal blackboard, to overcome the liquid crystal writing plate of the prior art cannot be local Wiping portion causes liquid crystal writing writing on the blackboard to write the defect of low efficiency.
The embodiment of the invention provides it is a kind of can selective erase liquid crystal blackboard, comprising:
Liquid crystal display layer, including display surface, the liquid crystal display layer is according to the received pressure touch track of display surface Show corresponding image；
Identification device wipes projected position and projected outline of the part in display surface for identification, when the erasing part Selective erase signal is generated when projected outline is more than preset area；
Erasing circuit, for carrying out image to the corresponding display surface of the projected position according to the selective erase signal Erasing.
Optionally, the preset area includes the first preset area and the second preset area, and the erasing part includes first Part and the second erasing part are wiped, the identification device first wipes part in the projected position of display surface and projection wheel for identification Exterior feature generates selective erase signal or identification dress when the projected outline of the first erasing part is more than the first preset area Projected position and projected outline of the second erasing part in display surface for identification is set, when the projected outline of the second erasing part Selective erase signal is generated when more than the second preset area, first preset area is less than the second preset area, the first erasing Size of the size of part less than the second erasing part.
Optionally, further comprise that the first erasing part places position and the second erasing part places position, be respectively used to described in receiving First erasing part and the second erasing part.
Optionally, it is solid for adsorbing to respectively include magnetic part for the first erasing part placement position and the second erasing part placement position The fixed first erasing part and the second erasing part.
Optionally, the first erasing part places the first light sensor of position setting, for being removed when the first erasing part When generate first game erasing signals, the identification device sets the first default face for preset area according to first game erasing signals Product；Second erasing part places position and the second light sensor is arranged, and wipes for generating second game when the second erasing part is removed Signal, the identification device set the second preset area for preset area according to second game's erasing signals.
Optionally, the erasing circuit includes multiple the first electricity being spaced apart from each other for being set to liquid crystal display layer first surface Pole item is set to multiple second electrode items being spaced apart from each other of liquid crystal display layer second surface, the first surface and the second table The extending direction of two surfaces that face is away from each other for liquid crystal display layer, the first electrode item and second electrode item is mutually perpendicular to.
Optionally, the erasing circuit includes the first driving chip connected with the first electrode item and described second Second driving chip of electrode strip connection, and the third chip of connection the first driving chip and the second driving chip, described the Three chips are for generating selective erase driving signal after receiving the selective erase signal, and first driving chip is according to Selective erase driving signal generate drive part first electrode item first partial erasing voltage, second driving chip according to The selective erase driving signal generates the second local erasing voltage of drive part second electrode item.
It optionally, further comprise that button is wiped by office, button is wiped for generating first mode signal, the erasing electricity by the office Operating mode is wiped according to first mode signal enabling office in road, to receive selective erase signal.
It optionally, further comprise full wiping button, for generating second mode signal, described first drives the full wiping button Dynamic chip generates the third selective erase voltage for driving whole first electrode items according to the second mode signal, and described second drives Dynamic chip generates the 4th selective erase voltage for driving whole second electrodes article according to the second mode signal.
The present invention, which realizes, wipes the regional area of written contents, and other regions are not influenced then by erasing, are overcome Traditional technology can only realize the deficiency all wiped, and improve the working efficiency and usage experience of user, improve liquid crystal blackboard And its commercial value of application apparatus.
Detailed description of the invention
Fig. 1 be the embodiment of the present invention one provide it is a kind of can selective erase liquid crystal blackboard structural schematic diagram；
Fig. 2 be the embodiment of the present invention one provide it is a kind of can selective erase liquid crystal blackboard structural schematic diagram；
Fig. 3 be the embodiment of the present invention one provide it is a kind of can selective erase liquid crystal blackboard partial circuit diagram；
Fig. 4 be the embodiment of the present invention one provide it is a kind of can selective erase liquid crystal blackboard partial circuit diagram.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 be the embodiment of the present invention one provide it is a kind of can selective erase liquid crystal blackboard structural schematic diagram.Such as Fig. 1 institute Show, which includes:
Liquid crystal display layer 110, including display surface, the liquid crystal display layer is according to the received pressure touch rail of display surface Mark shows corresponding image；
Identification device 120 wipes projected position and projected outline of the part in display surface, when the erasing part for identification Projected outline be more than preset area when generate selective erase signal；
Specifically, identification device can be infrared sensor, it is set to the surrounding of liquid crystal display, by sending infrared ray Projected position and projected outline of the erasing part in display surface are identified, when the projected outline of the erasing part is more than preset area When generate selective erase signal.It should be understood that identification device is not limited to infrared sensor.In every case erasing part can be identified Projected position and projected outline in display surface generate part when the projected outline of the erasing part is more than preset area and wipe Except the object of signal, protection scope of the present invention is both fallen within.
Erasing circuit 130, for being carried out according to the selective erase signal to the corresponding display surface of the projected position Image wipe.The present embodiment is when wiping part when display surface is mobile, according to preset sample frequency to erasing part in display table The projected position in face and projected outline are identified that the projected position of the erasing part identified every time and projected outline wipe as image The foundation removed wipes the image shown in projected position and projected outline, and other regions are shown, are not wiped It influences.
The present invention, which realizes, wipes the regional area of written contents, and other regions are not influenced then by erasing, are overcome Traditional technology can only realize the deficiency all wiped, and improve the working efficiency and usage experience of user, improve liquid crystal blackboard And its commercial value of application apparatus.
Optionally, the preset area includes the first preset area and the second preset area, and the erasing part includes first Part and the second erasing part are wiped, the identification device first wipes part in the projected position of display surface and projection wheel for identification Exterior feature generates selective erase signal or identification dress when the projected outline of the first erasing part is more than the first preset area Projected position and projected outline of the second erasing part in display surface for identification is set, when the projected outline of the second erasing part Selective erase signal is generated when more than the second preset area, first preset area is less than the second preset area, the first erasing Size of the size of part less than the second erasing part.
Specifically, the liquid crystal blackboard of the embodiment of the present invention can also include two erasing parts of different sizes, it is similar to general The blackboard eraser of logical blackboard.Part is wiped when wiping liquid crystal blackboard, identification device can identify erasing part in the projection position of display surface It sets and projected outline, generates selective erase signal when the projected outline of the erasing part is more than preset area；
Optionally, liquid crystal blackboard further comprises that the first erasing part places position and the second erasing part places position, is respectively used to Accommodate the first erasing part and the second erasing part.
Specifically, the first erasing part places position and the second erasing part placement position can be with the surrounding of liquid crystal blackboard or side, both It can be set together, also can be set on both sides of liquid crystal blackboard etc..It should be understood that the present invention does not limit the first erasing Part places position and the second erasing part places the specific location of position.
Optionally, it is solid for adsorbing to respectively include magnetic part for the first erasing part placement position and the second erasing part placement position The fixed first erasing part and the second erasing part.
Specifically, the present invention wipes part and second by the way of magnetic absorption, by first for how to place erasing part Erasing part is adsorbed on the first erasing part respectively and places position and the second erasing part placement position.
Optionally, the first erasing part places the first light sensor of position setting, for being removed when the first erasing part When generate first game erasing signals, the identification device sets the first default face for preset area according to first game erasing signals Product；Second erasing part places position and the second light sensor is arranged, and wipes for generating second game when the second erasing part is removed Signal, the identification device set the second preset area for preset area according to second game's erasing signals.
Specifically, the first erasing part places position and the first light sensor is arranged, for when the first erasing part is removed First game erasing signals are generated, identification device sets the first preset area for preset area according to first game erasing signals, and is used for Projected position and projected outline of the identification erasing part in display surface, when the projected outline of the erasing part is more than the first default face Selective erase signal is generated when product；Erasing circuit is corresponding to the first erasing part projected position according to the selective erase signal Display surface carry out image wipe.
Second erasing part places position and the second light sensor is arranged, for generating second when the second erasing part is removed Office's erasing signals, the identification device set the second preset area for preset area according to second game's erasing signals, and for identification Projected position and projected outline of the part in display surface are wiped, when the projected outline of the erasing part is more than the first preset area Generate selective erase signal；Erasing circuit is corresponding according to projected position of the selective erase signal to the second erasing part Display surface carries out image wipe.
Optionally, the erasing circuit includes multiple the first electricity being spaced apart from each other for being set to liquid crystal display layer first surface Pole item is set to multiple second electrode items being spaced apart from each other of liquid crystal display layer second surface, the first surface and the second table The extending direction of two surfaces that face is away from each other for liquid crystal display layer, the first electrode item and second electrode item is mutually perpendicular to.
Specifically, as shown in Fig. 2, erasing circuit include multiple first electrode items 11 being spaced apart from each other, liquid crystal display layer 12, Multiple second electrode items 13 being spaced apart from each other.First electrode item 11 is set to the first surface of liquid crystal display layer 12, second electrode Item 12 is set to the second surface of liquid crystal display layer, and first surface and second surface are two tables that liquid crystal display layer is away from each other The extending direction of face, the first electrode item and second electrode item is mutually perpendicular to.
Optionally, the erasing circuit includes the first driving chip connected with the first electrode item and described second Second driving chip of electrode strip connection, and the third chip of connection the first driving chip and the second driving chip, described the Three chips are for generating selective erase driving signal after receiving the selective erase signal, and first driving chip is according to Selective erase driving signal generate drive part first electrode item first partial erasing voltage, second driving chip according to The selective erase driving signal generates the second local erasing voltage of drive part second electrode item.
Specifically, erasing circuit includes the first driving chip connected with the first electrode item and the second electrode Second driving chip of item connection, and the third chip of connection the first driving chip and the second driving chip, the third core Piece is for generating selective erase driving signal after receiving the selective erase signal, and first driving chip is according to the part The first partial erasing voltage that driving signal generates drive part first electrode item is wiped, second driving chip is according to Selective erase driving signal generates the second local erasing voltage of drive part second electrode item, first partial erasing voltage and the Two selective erase voltages carry out image wipe to the corresponding display surface of projected position.
As shown in Figure 3,4, chip U5 is the first driving chip, connects first electrode item, i.e. ITO anode；Chip U12 is the Two driving chips connect second electrode item, i.e. ITO cathode；Chip U6 is third chip.After chip U6 receives selective erase signal Selective erase driving signal is generated, the first driving chip and the second driving chip, i.e. chip U5 and chip U12 are sent respectively to. Chip U5 generates first partial erasing voltage according to selective erase driving signal, is used for driving portion after the amplification of the first triode Divide ITO anode；Chip U12 generates the second local erasing voltage according to selective erase driving signal, amplifies by the second triode It is used for drive part ITO cathode afterwards.First partial erasing voltage and the second local erasing voltage are to the corresponding display of projected position Surface carries out image wipe.
Optionally, which further comprises that button is wiped by office, and the office wipes button and is used to generate first mode signal, The erasing circuit wipes operating mode according to first mode signal enabling office, to receive selective erase signal.
Optionally, which further comprises full wiping button, and the full wiping button is used to generate second mode signal, First driving chip generates the third selective erase voltage for driving whole first electrode items according to the second mode signal, Second driving chip generates the 4th selective erase voltage for driving whole second electrodes article according to the second mode signal.
Specifically, the liquid crystal blackboard includes full wiping button, when wiping button entirely for pressing, full wiping button generates the second mould Formula signal, the first driving chip generate the third selective erase electricity for driving whole first electrode items according to the second mode signal Pressure, second driving chip generate the 4th selective erase electricity for driving whole second electrodes article according to the second mode signal Pressure.Third selective erase voltage drives whole first electrode items, and the 4th selective erase voltage drives whole second electrodes article, to whole A liquid crystal display layer carries out image wipe.
The present invention, which realizes, wipes the regional area of written contents, and other regions are not influenced then by erasing, are overcome Traditional technology can only realize the deficiency all wiped, and improve the working efficiency and usage experience of user, improve liquid crystal blackboard And its commercial value of application apparatus.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation, It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.

Claims (9)

1. one kind can selective erase liquid crystal blackboard characterized by comprising
Liquid crystal display layer, including display surface, the liquid crystal display layer are shown according to the received pressure touch track of display surface Corresponding image；
Identification device wipes projected position and projected outline of the part in display surface for identification, when the projection of the erasing part Selective erase signal is generated when profile is more than preset area；
Erasing circuit, for carrying out image wiping to the corresponding display surface of the projected position according to the selective erase signal It removes.
2. it is according to claim 1 can selective erase liquid crystal blackboard, which is characterized in that the preset area include first Preset area and the second preset area, the erasing part include the first erasing part and the second erasing part, and the identification device is used for Projected position and projected outline of the first erasing part of identification in display surface, when the projected outline of the first erasing part is more than the Projection of the second erasing part in display surface for identification of selective erase signal or the identification device is generated when one preset area Position and projected outline generate selective erase signal when the projected outline of the second erasing part is more than the second preset area, First preset area wipes the size of part less than second less than the second preset area, the size of the first erasing part.
3. it is according to claim 2 can selective erase liquid crystal blackboard, which is characterized in that further comprise the first erasing part It places position and the second erasing part places position, be respectively used to accommodate the first erasing part and the second erasing part.
4. it is according to claim 3 can selective erase liquid crystal blackboard, which is characterized in that it is described first erasing part place position Position, which is placed, with the second erasing part respectively includes magnetic part for adsorbing the fixed first erasing part and the second erasing part.
5. it is according to claim 3 can selective erase liquid crystal blackboard, which is characterized in that it is described first erasing part place position First light sensor is set, for generating first game erasing signals, the identification device root when the first erasing part is removed The first preset area is set by preset area according to first game erasing signals；Second erasing part places position and the second light level is arranged Device, for generating second game's erasing signals when the second erasing part is removed, the identification device will according to second game's erasing signals Preset area is set as the second preset area.
6. it is according to claim 1 can selective erase liquid crystal blackboard, which is characterized in that the erasing circuit include setting In multiple first electrode items being spaced apart from each other of liquid crystal display layer first surface, it is set to the multiple of liquid crystal display layer second surface The second electrode item being spaced apart from each other, the first surface and second surface are two surfaces that liquid crystal display layer is away from each other, described The extending direction of first electrode item and second electrode item is mutually perpendicular to.
7. it is according to claim 6 can selective erase liquid crystal blackboard, which is characterized in that the erasing circuit includes and institute The second driving chip for connect with the second electrode item of the first driving chip of first electrode item connection is stated, and connects the The third chip of one driving chip and the second driving chip, the third chip after receiving the selective erase signal for generating Selective erase driving signal, first driving chip generate drive part first electrode according to the selective erase driving signal The first partial erasing voltage of item, second driving chip generate drive part second according to the selective erase driving signal The local erasing voltage of the second of electrode strip.
8. it is according to claim 7 can selective erase liquid crystal blackboard, which is characterized in that further comprise office wipe button, The office wipes button and wipes work according to first mode signal enabling office for generating first mode signal, the erasing circuit Mode, to receive selective erase signal.
9. it is according to claim 7 can selective erase liquid crystal blackboard, which is characterized in that further comprise it is complete wipe button, The full wiping button generates driving according to the second mode signal for generating second mode signal, first driving chip The third selective erase voltage of whole first electrode items, second driving chip generate driving according to the second mode signal 4th selective erase voltage of whole second electrodes article.
CN201910098097.7A 2019-01-31 2019-01-31 It is a kind of can selective erase liquid crystal blackboard Pending CN109613735A (en)

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Application Number Priority Date Filing Date Title
CN201910098097.7A CN109613735A (en) 2019-01-31 2019-01-31 It is a kind of can selective erase liquid crystal blackboard

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110703527A (en) * 2019-09-04 2020-01-17 陈华丰 Liquid crystal display device and erasing method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110703527A (en) * 2019-09-04 2020-01-17 陈华丰 Liquid crystal display device and erasing method thereof
CN110703527B (en) * 2019-09-04 2022-11-11 陈华丰 Liquid crystal display device and erasing method thereof

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