CN208569264U - Selective erase electromagnetic positioning system and handwriting pad, blackboard and drawing board including it - Google Patents
Selective erase electromagnetic positioning system and handwriting pad, blackboard and drawing board including it Download PDFInfo
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- CN208569264U CN208569264U CN201820997990.4U CN201820997990U CN208569264U CN 208569264 U CN208569264 U CN 208569264U CN 201820997990 U CN201820997990 U CN 201820997990U CN 208569264 U CN208569264 U CN 208569264U
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Abstract
The utility model discloses a kind of selective erase electromagnetic positioning system and including its handwriting pad, blackboard and drawing board, positioning system includes liquid crystal writing film and master controller, including the first conductive layer, liquid crystal layer and the second conductive layer successively arranged；First conductive layer or/and the second conductive layer are divided into the conductive region of at least two groups mutually insulated, the maximum width of first group of conductive region is less than setting value A, the minimum widith of second group of conductive region is greater than the set value B, A is less than B, two groups of conductive regions are spaced apart, and same group of conductive region is non-conterminous；Erasable region is collectively formed in lap of the conductive region of first conductive layer and the second conductive layer in space liquid crystal layer region corresponding with the part；First group of neighbouring conductive region of every two is connected, and forms closed circuit, and the master controller connects each first group of conductive region.
Description
Technical field
The utility model relates to liquid crystal writing technical field of membrane more particularly to a kind of selective erase electromagnetic positioning system and
Including its handwriting pad, blackboard and drawing board.
Background technique
Liquid crystal writing film has a wide range of applications as common tool is write, and having can Reusability, intelligence and environmental protection etc.
A variety of advantages have pushed the development of the application fields such as writing, record, teaching.The working principle of liquid crystal writing film is to utilize liquid crystal
Bistable characteristic realize display and/or erasing liquid crystal board on written contents.Such as using cholesteric liquid crystal as writing
Film is recorded the writing pressure trajectories of lettering pen by the pressure acted on liquid crystal board, and then shows corresponding writing
Content；So that cholesteric liquid crystal orientation is changed by applying electric field, so that writing pressure trajectories on liquid crystal board is disappeared with
Realize erasing.
But the existing product using liquid crystal writing film usually or using a key is wiped when carrying out handwriting erasing
Or whole erasing.In practical application, usually will appear only needs erasing part writing, while retaining the region that need to be wiped other than region
Writing or trace the case where.Presently, there are minorities can be realized selective erase technology, such as utilizes the special designing or knot of electric field
Pen with means for holding it in right position etc. is closed, still, these, which are required, is accurately positioned liquid crystal writing film, at present being capable of convenient and efficient reality
It now wipes, and can simulate in practical application, blackboard eraser etc. wipes the erasing experience or the technology of effect of part.
Meanwhile for writing film when writing, for writing part (such as lettering pen) or erasing part (such as blackboard eraser)
Positioning, mostly use infrared, optics or ultrasound/range sensor to carry out now, using infrared positioning, need using writing film
Product upper edge add one or more groups of infrared emission/receiving arrays, carry out the positioning of touch point, using optical alignment,
It needs to add at least two cameras on the product of application writing film, be positioned using ultrasound/range sensor, it is also desirable to answer
It is just able to achieve at least two ultrasounds/range sensor is added on the product of writing film for region to be write or region to be erased
Positioning and identification.
As can be seen that existing liquid crystal writing film for the positioning in region to be write or region to be erased require it is external its
His element, that is, increase input cost, increases liquid crystal writing mould or the volume of its application product, and can use liquid crystal to user
Increase disturbing factor when writing film, influences user experience and fluent writing.Therefore, how the specified region wiping in part is being realized
Except while, external needs can not be added occupy and write the component of product overall volume and come to writing part or/and erasing part
Effective position is carried out, is liquid crystal writing field urgent problem.
Utility model content
The utility model to solve the above-mentioned problems, propose a kind of selective erase electromagnetic positioning system and including its
Handwriting pad, blackboard and drawing board, the utility model can have writing part or/and erasing part while realizing selective erase
Effect positioning.
To achieve the goals above, the utility model adopts the following technical solution:
First purpose of the utility model is to provide a kind of selective erase electromagnetic positioning system, including liquid crystal writing film and master
Controller, in which:
The liquid crystal writing film includes the first conductive layer, liquid crystal layer and the second conductive layer；
First conductive layer or the second conductive layer are divided into the conductive region of at least two groups mutually insulated, and first group is led
The maximum width in electric region is less than setting value A, and the minimum widith of second group of conductive region is greater than the set value B, and A is less than B, and two groups
Conductive region is spaced apart, and same group of conductive region is non-conterminous；
First group of conductive region can be configured to connect as signal receiving area, first group of neighbouring conductive region of every two
The closed circuit of extraneous electromagnetic signals is received, the closed circuit connects master controller, and master controller turns received electromagnetic signal
Change positioning signal into.
The utility model changes the status that can only integrally wipe, and by the segmentation to conductive layer, writing film is divided into
Several erasable regions in part, are superimposed to form voltage difference, can be realized selective erase using the electric field in these regions.
Meanwhile the utility model forms the different conductive region of at least two classes by the cutting to conductive layer, says for simplicity
Bright principle, referred to as narrow conduction region and wide conduction region, (it is worth noting that, narrow/wide conduction region can be there are many size or shape
Shape, as long as meeting sets requirement) narrow conduction region and wide conduction region interval setting, after narrow conduction region forms closed circuit, when
Object with electromagnetic wave signal close to when, it will be able to generate induced current, by faradic generation position and intensity,
General location of the object on writing film can be confirmed, realize positioning.
Further, each conductive region is strip-shaped conductive region.
Further, each strip-shaped conductive region is parallel to each other.
In view of processing cost and the complexity of technique, conductive layer is divided into strip-shaped conductive area by the utility model
Domain, further, each strip-shaped conductive region are arranged in parallel, are conducive to improve processing efficiency, reduce process costs, convenient for criticizing
Amount production.
Further, each conductive region at least should include a part at its said conductive layer edge, be conducive to be each
Conductive region provides the wiring position of conducting wire, processing easy to produce, and conducting wire will not influence writing quality when in use.
Further, in each group of conductive region each conductive region it is of same size；The mode equidistantly divided, makes
Must divide it is more uniform, can effectively control erasing region；Also, spacing is smaller, and selective erase accuracy is higher.
Preferably, the width range needs of first group of conductive region match with practical application, can protect
The effect for guaranteeing to write display while demonstrate,proving locating effect, realize writing film display effect and positional accuracy and precision it
Between balance.
Preferably, the width range needs of second group of conductive region match with practical application, can protect
Guarantee while card erasing effect it is reasonable maximum use time dimension, realize writing film display effect and service life it
Between balance.
Second purpose of the utility model is open another selective erase electromagnetic positioning system, including liquid crystal writing film with
Master controller, in which:
The liquid crystal writing film includes the first conductive layer, liquid crystal layer and the second conductive layer；
First conductive layer and the second conductive layer are each split into the conductive region of at least two groups mutually insulated, and first group
The maximum width of conductive region is less than setting value A, and the minimum widith of second group of conductive region is greater than the set value B, and A is less than B, and two groups
Conductive region is spaced apart, and same group of conductive region is non-conterminous；
First group of conductive region can be configured to connect as signal receiving area, first group of neighbouring conductive region of every two
The closed circuit of extraneous electromagnetic signals is received, the closed circuit connects master controller, and master controller turns received electromagnetic signal
Change positioning signal into.
The positioning system is split upper layer and lower layer conductive layer respectively, conductive in the difference of upper and lower two conductive layer in this way
Region can apply different voltage, and electric field controls mode is more flexible, while improve the accuracy of selective erase.
In addition, be split respectively to upper layer and lower layer conductive layer, ensure that when the object with electromagnetic wave signal close to when,
First group of conductive region of upper layer and lower layer conductive layer corresponding position can generate induced current, pass through faradic generation
Position of the object on writing film can be confirmed in position and intensity, realizes positioning.It is fixed that the positioning of the system belongs to two dimension
Position is able to know that both direction (the x, y-axis) coordinate of the object relative to the horizontal plane of writing film, and localization region minimizes,
Locating effect is more preferable.
Further, first conductive layer or the second conductive layer are divided into the two or more of mutually insulated
Strip-shaped conductive region.
Further, each conductive region of first conductive layer is distributed along first direction, is parallel to each other；Described second leads
Each conductive region of electric layer is distributed in a second direction, is parallel to each other, and first direction and second direction are spatially interlaced；
Preferably, the first direction is vertical with second direction.
This partitioning scheme can be such that cut zone minimizes according to actual needs convenient for industrial mass processing,
By the energization to different conductive strips, more accurate selective erase and positioning are realized.
Further, each conductive region of first conductive layer at least should include one of first conductive layer edge
Point；Each conductive region of second conductive layer at least should include a part at second conductive layer edge.
Further, first group of conductive region on first conductive layer is of same size, second group of conductive region
It is of same size；First group of conductive region on second conductive layer it is of same size, second group of conductive region it is of same size.
Preferably, the width range needs of first group of conductive region match with practical application, can guarantee
Guarantee to write the effect shown while locating effect, realize between the display effect and positional accuracy and precision of writing film
Balance.
Preferably, the width range needs of second group of conductive region match with practical application, can guarantee
Guarantee that reasonable maximum uses time dimension while wiping effect, realizes between the display effect of writing film and service life
Balance.
Further, the width of first group of conductive region on first conductive layer, on second conductive layer
First group of conductive region it is of same size；
Further, the width of second group of conductive region on first conductive layer, on second conductive layer
Second group of conductive region it is of same size.
This setup, can by entire writing film coordinatograph, guarantee when with electromagnetic wave signal object close to when,
First group of conductive region of upper layer and lower layer conductive layer corresponding position can generate induced current, pass through faradic generation
X of the object on writing film, y-axis coordinate can be confirmed in position and intensity, and localization region minimizes, and locating effect is more
It is good.
Meanwhile this setup, it is also convenient for processing, meanwhile, it ensure that each erasable region is in the same size, more conducively
Positioning and selective erase, also bring better writing experience to user.
Further, the setting of at least one conductive layer is on the base layer in first conductive layer and the second conductive layer.
Basal layer can play supporting role for conductive layer, improve writing film overall stability.
Further, it is equipped between at least one conductive layer and liquid crystal layer in first conductive layer and the second conductive layer
Insulating layer.
The isolation that liquid crystal layer and conductive layer can be better achieved in insulating layer is set, writing film service life is extended.
The purpose of third of the utility model is to disclose a kind of selective erase electromagnetic positioning system, including liquid crystal writing film, master
Controller and conductive mesh, in which:
The conductive mesh is set to the back side of liquid crystal writing film, and conductive mesh includes multiple conducting wires, what every two was disposed adjacent
The conducting wire can be configured to receive the closed circuit of extraneous electromagnetic signals, and the closed circuit connects master controller, main control
Received electromagnetic signal is converted into positioning signal by device.
The utility model is connected two-by-two by conducting wire, forms closed circuit, when the object with electromagnetic wave signal is close
When, it will be able to induced current is generated, by faradic generation position and intensity, can be confirmed the object on writing film
General location, realize positioning.
Conductive mesh is set to the back side of liquid crystal writing film, has no effect on writing and display.
As an implementation, further, the conductive mesh includes the one group of conducting wire and second direction of first direction
One group of conducting wire, above-mentioned two groups of conducting wire mutually insulateds simultaneously space formed conductive mesh；
Further, the conductive mesh is that conducting wire weaves.
Conductive mesh is double-layer structure, can participate in positioning in different groups of conducting wires in this way, can be confirmed and believes with electromagnetic wave
Number horizontal plane of the object on writing film both direction (x, y-axis) coordinate, and localization region minimizes, and locating effect is more
It is good.
Further, each group of conducting wire is parallel to each other.
More preferably, the conducting wire positioned at different groups is mutually perpendicular to.
This partitioning scheme can make the cut zone of positioning small according to actual needs convenient for industrial mass processing
Type, ribbonizing and standardization.
Further, the spacing distance of each group of the conducting wire is identical, and the distance is required to guarantee preferably
Locating effect.
More preferably, the spacing distance of every group of conducting wire is all identical.
This partitioning scheme can be such that the cut zone of positioning sits according to actual needs convenient for industrial mass processing
Markization, standardization.
4th purpose of the utility model is to disclose a kind of selective erase electromagnetic positioning system, including liquid crystal writing film, master
Controller and conductive film, in which:
The front or the back side of liquid crystal writing film is arranged in conductive film；
The conductive film includes the first conductive layer, the second conductive layer；
First conductive layer or the second conductive layer are divided into the conductive region of at least two groups mutually insulated, and first group is led
The maximum width in electric region is less than setting value A, and the minimum widith of second group of conductive region is greater than the set value B, and A is less than B, and two groups
Conductive region is spaced apart, and same group of conductive region is non-conterminous；
First group of conductive region can be configured to connect as signal receiving area, first group of neighbouring conductive region of every two
The closed circuit of extraneous electromagnetic signals is received, the closed circuit connects master controller, and master controller turns received electromagnetic signal
Change positioning signal into.
5th purpose of the utility model is to disclose a kind of selective erase electromagnetic positioning system, including liquid crystal writing film, master
Controller and conductive film, in which:
The front or the back side of liquid crystal writing film is arranged in conductive film；
The conductive film is divided into the conductive region of at least two groups mutually insulated, the maximum width of first group of conductive region
Less than setting value A, the minimum widith of second group of conductive region is greater than the set value B, and A is less than B, and two groups of conductive regions are spaced apart,
Same group of conductive region is non-conterminous；
First group of conductive region can be configured to connect as signal receiving area, first group of neighbouring conductive region of every two
The closed circuit of extraneous electromagnetic signals is received, the closed circuit connects master controller, and master controller turns received electromagnetic signal
Change positioning signal into.
6th purpose of the utility model is to disclose a kind of handwriting pad, which includes that above-mentioned selective erase electromagnetism is fixed
Position system；Further,
The handwriting pad further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character simultaneously stores；
Further, the handwriting pad further include:
Handwriting trace information or standard character are sent to outside for being communicated with external equipment by communication unit
Equipment.
Certainly, external equipment described above may include equipment well known to cloud etc..
Matched, the erasing part for forming the writing part of handwriting trace or capableing of erasing writing writing has and can send out
The function of radio magnetostatic wave signal.
7th purpose of the utility model is to disclose a kind of blackboard, which includes above-mentioned selective erase electromagnetic location system
System；Further,
The blackboard further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character simultaneously stores；
Further, the blackboard further include:
Handwriting trace information or standard character are sent to outside for being communicated with external equipment by communication unit
Equipment.
Matched, the erasing part for forming the writing part of handwriting trace or capableing of erasing writing writing has and can send out
The function of radio magnetostatic wave signal.
8th purpose of the utility model is to disclose a kind of drawing board, which includes above-mentioned selective erase electromagnetic location system
System；
Further,
The drawing board further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character simultaneously stores；
Further, the drawing board further include:
Handwriting trace information or standard character are sent to outside for being communicated with external equipment by communication unit
Equipment.
Matched, the erasing part for forming the writing part of handwriting trace or capableing of erasing writing writing has and can send out
The function of radio magnetostatic wave signal.
Compared with prior art, the utility model has the following beneficial effects:
Liquid crystal writing film disclosed by the utility model forms mutually insulated by the way that at least one conductive layer to be split
Conductive region forms erasing electric field, can be realized the partial zones for written contents by the control to each conductive region voltage
Domain erasing, and other regions are not influenced then by erasing, the deficiency all wiped can only be realized by overcoming traditional technology, improve use
The working efficiency and usage experience at family improve the commercial value of liquid crystal writing film and its application apparatus.
The utility model can not add external needs and occupy the portion for writing space on the basis of realizing selective erase
Part can have preferable experience sense in user, or even when not influencing the use feeling of user, using electromagnetic principle to writing
Part or/and erasing part carry out effective position.
The utility model by different prioritization schemes, can guarantee when have the object with electromagnetic wave signal close to when,
Induced current can be generated, by faradic generation position and intensity, can be confirmed that the object is big on writing film
Positioning is realized in body or more exact position.
The adaptable field of the utility model includes: that board, luminous energy board, luminous energy liquid crystal handwriting pad, luminous energy are big
Liquid crystal writing blackboard, luminous energy dust-free writing board, luminous energy Portable blackboard, electronic drawing board, l cd electronic writing plate, electronic handwritten plate,
Electronic recording notebook, drawing pad, children's handwriting pad, allowing child daubing drawing board, erasing rubber function sketching board, liquid crystal electron drawing
Plate, color liquid crystal handwriting pad etc..
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is a kind of structure chart of embodiment of liquid crystal writing film；
Fig. 2 is a kind of structural schematic diagram of embodiment of selective erase electromagnetic positioning system；
Fig. 3 is the structural schematic diagram of second of embodiment of selective erase electromagnetic positioning system；
Fig. 4 (a) is the structural side view of the third embodiment of selective erase electromagnetic positioning system；
Fig. 4 (b) is the structural exploded view of the third embodiment of selective erase electromagnetic positioning system.
Specific embodiment:
The utility model is described in further detail with embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In the present invention, term for example "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal",
The orientation or positional relationship of the instructions such as " side ", "bottom" is to be based on the orientation or positional relationship shown in the drawings, only to facilitate chatting
The relative for stating each component of the utility model or component structure relationship and determination, not refer in particular in the utility model either component or
Element should not be understood as limiting the present invention.
In the utility model, term such as " affixed ", " connected ", " connection " be shall be understood in a broad sense, and expression can be fixation
Connection, is also possible to be integrally connected or be detachably connected；It can be directly connected, the indirect phase of intermediary can also be passed through
Even.Related scientific research or technical staff for this field can determine as the case may be above-mentioned term in the present invention
Concrete meaning, should not be understood as limiting the present invention.
As described in the background art, the existing product using liquid crystal writing film, when carrying out handwriting erasing, generally
It is only capable of using the power on mode and changes the liquid crystal aligning of whole writing film and change, realize all person's handwritings in entire liquid crystal writing plate
Erasing, i.e. a key erasing.In practical application, usually will appear only need erasing part writing, while retain need to wipe region with
The case where writing or trace in outer region, existing entirety erasing mode are not able to satisfy above-mentioned actual demand.
Meanwhile for writing film when writing, for writing part (such as lettering pen) or erasing part (such as blackboard eraser)
Positioning, mostly use infrared, optics or ultrasound/range sensor to carry out now, using infrared positioning, need using writing film
Product upper edge add one or more groups of infrared emission/receiving arrays, carry out the positioning of touch point, using optical alignment,
It needs to add at least two cameras on the product of application writing film, be positioned using ultrasound/range sensor, it is also desirable to answer
It is just able to achieve at least two ultrasounds/range sensor is added on the product of writing film for region to be write or region to be erased
Positioning and identification.
Therefore, the utility model is provided while realizing that part specifies region to wipe, and can not add external needs
The component for occupying writing space comes to the system write part or/and wipe part progress effective position.
Embodiment one:
As shown in Figure 1, a kind of selective erase electromagnetic positioning system, including liquid crystal writing film and master controller, wherein liquid crystal
Writing film includes the first conductive layer, liquid crystal layer and the second conductive layer successively arranged from top to bottom；First conductive layer is divided into
The maximum width of the conductive region of at least two groups mutually insulated, first group of conductive region is less than setting value A, second group of conductive region
Minimum widith be greater than the set value B, A is less than B, and two groups of conductive regions are spaced apart, and same group of conductive region is non-conterminous；
Lap and the part of the monolithic conductive region of first conductive layer conductive region and the second conductive layer in space
Erasable region is collectively formed in corresponding liquid crystal layer region；
First group of conductive region can be configured to connect as signal receiving area, first group of neighbouring conductive region of every two
The closed circuit of extraneous electromagnetic signals is received, the closed circuit connects master controller, and master controller turns received electromagnetic signal
Change positioning signal into.
Writing film is divided into the erasable region in several parts, utilizes these regions by this by the segmentation to conductive layer
Electric field is superimposed to form voltage difference, can be realized selective erase.
By the cutting to conductive layer, the different conductive region of at least two classes is formed, is concise explanation principle, it is referred to as narrow
Conduction region and wide conduction region, (it is worth noting that, narrow/wide conduction region can be there are many size or shape, as long as meeting setting
It is required that) narrow conduction region and wide conduction region interval setting, after so that narrow conduction region is formed closed circuit, believe when with electromagnetic wave
Number object close to when, it will be able to generate induced current, by faradic generation position and intensity, the object can be confirmed
General location of the body on writing film realizes positioning.
It is fully disconnected two conductive regions to form mutually insulated between above-mentioned two neighboring conductive region, realizes mutual
The mode of insulation preferably using etching by the way of, alternatively, using those skilled in the art it is conceivable that others realization sides
Formula.
In the present embodiment, the first conductive layer is divided by etched line, the shape of etched line is unlimited, is formed by
The shape of conductive region is determined according to etching wire shaped and arrangement mode.Preferable scheme is that conductive layer guarantor when being divided
Demonstrate,proving each conductive region at least should include a part at the conductive layer edge, convenient for each conductive region and master controller or other circuits
Structure is attached.
It is of course also possible to be split in other embodiments to the second conductive layer.Not due to the conductive layer in addition to segmentation
Together, other technologies details can be identical, and the embodiment being only split to the second conductive layer is repeated no more herein.
More preferably, in embodiment, each conductive region is strip-shaped conductive region.Each strip-shaped conductive region can be mutual
In parallel.
In view of processing cost and the complexity of technique, conductive layer is divided into strip-shaped conductive region, and it is each band-like
Conductive region is arranged in parallel, is conducive to improve processing efficiency, reduces process costs, convenient for batch production.
As highly preferred embodiment, each conductive region is of same size in each group of conductive region；This is because
The mode equidistantly divided can effectively control erasing region so that segmentation is more uniform；Also, spacing is smaller, selective erase
Accuracy is higher.
Preferably, the range of the width setting of first group of conductive region needs and concrete application situation is adapted, and realizes energy
Enough effects for guaranteeing to write display while guaranteeing locating effect, realize the display effect and positional accuracy of writing film
Balance between precision.
Preferably, the range of the width setting of second group of conductive region needs and concrete application situation is adapted, real
Can now guarantee while guaranteeing to wipe effect it is reasonable maximum use time dimension, realize writing film display effect and
Balance between service life.
Fig. 1 gives one of embodiment of writing film: the first conductive layer, which is divided into two groups shown in figure, leads
Electric region, first group of conductive region include tetra- conductive regions of a, b, c, d, and second group of conductive region includes e, f, g, h tetra-
A conductive region, it is not adjacent to each other with the conductive region at one group.
The shape of each conductive region be it is irregular, each conductive region contains the first conductive layer edge
A part；Second conductive layer is not divided；
A, b, c, d, e, f, g, h conductive region on first conductive layer is distinguished the overlapped part of the second conductive layer and is formed
Erasable region a1, b1, c1, d1, e1, f1, g1, h1.
By each conductive region on the first conductive layer by electrode and corresponding conducting wire respectively with voltage application device
Electrical connection, in order to apply voltage for each conductive region.Second conductive layer is passed through into electrode and corresponding conducting wire and voltage
Bringing device electrical connection applies voltage for the second conductive layer.By applying voltage, in each conductive region of the first conductive layer
And second form electric field between conductive layer, the different voltages difference for utilizing each erasing region to be formed realizes selective erase.
A is connected to b by conducting wire, closed circuit is formed, likewise, b and c, c and d form individual closed circuit,
It is respectively formed I, I I and the circuit I I I.Conducting is successively controlled by master controller, carries out repeating query, such as the circuit I was connected before this,
It is the conducting of the circuit I I again, then the circuit I I I is connected, and then returns to the conducting of the circuit I, circuits sequentially down.
In the present embodiment, since attached drawing 1 is only example, so the division number provided is smaller, when dividing number is big
When, the conducting different circuit that can be spaced when some closed circuit detects em induced current, then sequentially turns on the closure
Circuit near circuit, is detected by coarse localization, is reduced electric energy investment, is increased the efficiency of detection, by finely fixed
Position, increases the accuracy of positioning.
Second purpose of the utility model is open another selective erase electromagnetic positioning system, including liquid crystal writing film with
Master controller, in which:
Liquid crystal writing film includes the first conductive layer, liquid crystal layer and the second conductive layer successively arranged；
First conductive layer and the second conductive layer are each split into the conductive region of at least two groups mutually insulated, and first group conductive
The maximum width in region is less than setting value A, and the minimum widith of second group of conductive region is greater than the set value B, and A is less than B, and two groups are led
Electric region is spaced apart, and same group of conductive region is non-conterminous；
Lap of the conductive region of first conductive layer and the second conductive layer in space liquid crystal layer corresponding with the part
Erasable region is collectively formed in region；
First group of conductive region can be configured to connect as signal receiving area, first group of neighbouring conductive region of every two
The closed circuit of extraneous electromagnetic signals is received, the closed circuit connects master controller, and master controller turns received electromagnetic signal
Change positioning signal into.
First conductive layer or the second conductive layer are divided into two or more strip-shaped conductive regions of mutually insulated.
Realize mutually insulated mode preferably using etch by the way of, alternatively, using those skilled in the art it is conceivable that other
Implementation.
When being divided by etched line to conductive layer, the shape of etched line is unlimited, is formed by the shape of conductive region
It is determined according to etching wire shaped and its arrangement mode.Preferred scheme is that conductive layer guarantees each conductive region when being divided extremely
It less should include a part at the conductive layer edge, be attached convenient for each conductive region and external circuit structure.
Each conductive region of first conductive layer is distributed along first direction, is parallel to each other；Each conductive region of second conductive layer
It is distributed, is parallel to each other in a second direction, first direction and second direction are spatially interlaced；
As preferred mode, first direction is vertical with second direction.As shown in Figure 2.Certainly, in detail in this figure, in order to more
Illustrate well that more highdensity conductive region can be set on conductive layer, unillustrated place, such as a4To am-1, am+2To an-1,
b4To bm-1Deng being consistent with the place drawn.
It but is only more preferred mode in figure, substantial unillustrated place can be tied with the region regarded out
Structure and/or size are different.Meanwhile it will be appreciated by those skilled in the art that, these attached drawings are only schematic diagram, etched line,
The proportionate relationship of one group of conductive region and second group of conductive region might not be as illustrated throughout the figures.
This preferred mode of embodiment two, is split upper layer and lower layer conductive layer respectively, conductive upper and lower two in this way
The different conductive regions of layer can apply different voltage, and electric field controls mode is more flexible, while improving selective erase
Accuracy.
Embodiment two is split upper layer and lower layer conductive layer compared with embodiment one respectively, ensure that when with electromagnetism
The object of wave signal close to when, first group of conductive region of upper layer and lower layer conductive layer corresponding position can generate induced electricity
Position of the object on writing film can be confirmed by faradic generation position and intensity in stream, realizes positioning.It should
The positioning of system belongs to two-dimensional localization, is able to know that the object is sat relative to the both direction (x, y-axis) of the horizontal plane of writing film
Mark, and localization region minimizes, locating effect is more preferable.
As detailed description, as the conductive region a on the first conductive layermAnd am+1It the circuit of formation and second leads
Conductive region b in electric layernAnd bn-1When the circuit of formation is detected simultaneously by sensor current signal, illustrate near erasable region G
There is the erasing part of electromagnetic signal or write part, can identify erasing part in this way or writes part in two sides of the horizontal plane of writing film
There is certain improvement relative to approximate region can be positioned to the greatest extent in embodiment one to the position of (x, y-axis).
More preferably, of same size, the width of second group of conductive region of first group of conductive region on the first conductive layer
It spends identical；First group of conductive region on second conductive layer it is of same size, second group of conductive region it is of same size.
Preferably, the range of the setting of first group of conductive region width needs and concrete application situation is adapted, real
It can now guarantee to write the effect shown while guaranteeing locating effect, display effect and the positioning for realizing writing film are quasi-
Balance between exactness and precision.
Preferably, the range of the width setting of second group of conductive region needs and concrete application situation is adapted, real
Can now guarantee while guaranteeing to wipe effect it is reasonable maximum use time dimension, realize writing film display effect and
Balance between service life.
The width of first group of conductive region on first conductive layer, the width with first group of conductive region on the second conductive layer
It spends identical；The width of second group of conductive region on first conductive layer, the width with second group of conductive region on the second conductive layer
It spends identical.
This partitioning scheme is more preferably mode, and this mode, while being capable of basis convenient for industrial mass processing
Actual needs minimizes cut zone, by the energization to different conductive strips, realizes more accurate selective erase.Certainly,
In special application or design requirement, the above-mentioned mode uniformly etched can be changed.
Entire writing film gridding, coordinatograph can be similar to chessboard, each grid is an individually erasing
Region, at the same guarantee when with electromagnetic wave signal object close to when, first group of upper layer and lower layer conductive layer corresponding position is led
Electric region can generate induced current, by faradic generation position and intensity, can be confirmed that the object is being write
X, y-axis coordinate on film, and localization region minimizes, locating effect is more preferable.
Meanwhile this setup, it is also convenient for processing, meanwhile, it ensure that each erasable region is in the same size, more conducively
Positioning and selective erase, also bring better writing experience to user.
Embodiment three:
As shown in Fig. 4 (a) and Fig. 4 (b), a kind of selective erase electromagnetic positioning system, including liquid crystal writing film, master controller
And conductive metal mesh, in which:
Liquid crystal writing film includes the first conductive layer, liquid crystal layer and the second conductive layer successively arranged from top to bottom；
First conductive layer or/and the second conductive layer one of them be divided into the conduction of two or more mutually insulateds
Region；
The part that the conductive region and liquid crystal layer of first conductive layer and the second conductive layer are overlapped jointly is erasable region；
Conductive metal mesh is set to the back side of liquid crystal writing film, and conductive metal mesh includes multiple conductive wires, every two
The conductive wire being disposed adjacent is connected, and forms closed circuit, and the master controller connects each conductive wire.
Preferably, above-mentioned conductive wire is copper wire.
The present embodiment and embodiment one and embodiment two the difference is that, pass through conductive wire using conductive metal mesh
Be connected two-by-two, formed closed circuit, when with electromagnetic wave signal object close to when, it will be able to generate induced current, pass through
General location of the object on writing film can be confirmed in faradic generation position and intensity, realizes positioning.
Conductive metal mesh is set to the back side of liquid crystal writing film, has no effect on writing and display.
Certainly, this mode can only position the approximate location in one-dimensional square, as shown in connection with fig. 3, can only position with electricity
The object of magnetostatic wave signal is in a1And a2Between, or in amAnd am+1Between, still, in amAnd am+1Between longitudinal direction on
Position can not determine.
Certainly, more preferably, as shown in Fig. 4 (b), conductive metal mesh includes the first metal layer and second metal layer, and
One metal layer and second metal layer include multiple conductive wires, and the every two on each layer of metal layer is disposed adjacent described
Conductive wire is connected, and forms closed circuit, and the master controller connects each conductive wire.
Conductive metal mesh is double-layer structure, and it is fixed to participate in the different conductive wires of upper and lower two metal layer in this way
Position can be confirmed both direction (x, y axis) coordinate of horizontal plane of the object with electromagnetism model on writing film, and position
Region miniaturization, locating effect are more preferable.It can determine in amAnd am+1Between, it also can determine that in bmAnd bm+1Between.
Example is shown to be a preferred mode in figure, and the conductive wire of each metal layer is parallel to each other.And it is located at not
Conductive wire with metal layer is mutually perpendicular to.
This partitioning scheme can make the cut zone of positioning small according to actual needs convenient for industrial mass processing
Type, ribbonizing and standardization.
Certainly, it is also shown in figure than more preferably mode, i.e., the interval of the adjacent conductive wire of each metal layer
Apart from identical.
More preferably, the spacing distance of the adjacent conductive wire of two metal layers is all identical.
This partitioning scheme can be such that the cut zone of positioning sits according to actual needs convenient for industrial mass processing
Markization, standardization.
Different wires used for positioning is connected in main controller controls interval, and carries out repeating query, when certain wire generates
When induced current, Primary Location is realized, the wire used for positioning controlled in the setting range of Primary Location region sequentially turns on,
It is determined positioning.
When being such as continuously turned on, the first metal layer is just from circuit a1…am…anSuccessively repeating query, second metal layer is just from circuit
b1…bm…bnSuccessively repeating query, to be positioned, certainly, if measured in amAnd bmNearby there is inductive signal, just only in amAnd bm
Range within periphery x carries out repeating query, other positions are no longer detected, and can be improved efficiency in this way.
Certainly, efficiency in order to better improve, can be using interval conducting, from circuit a if the first metal layer1、a4、
a8…am…am+8... carry out repeating query is waited, second metal layer is just from b1、a5、a10…am…am+5... across repeating query of jumping, work as survey
It obtains in amAnd bmNearby there is inductive signal, just only in circuit amAnd bmRange within periphery x carries out repeating query, other positions are not
It detects again, can be improved efficiency in this way.
Certainly, when accurate repeating query, can with the first metal layer, accurate repeating query range all successively repeating queries of second metal layer, or
The mode of the position of the fixed a certain metal layer of person, i.e., to fix circuit amFor, successively repeating query bm-10…bm+10Mode.
Certainly, as another embodiment, metal grill can be directly utilized, is specifically included along first direction laying
Conductive wire and the conductive wire laid in a second direction, first direction intersect with second direction, form grid, and along not
It insulate between the conductive wire of equidirectional laying, the conductive wire that the same direction that every two is disposed adjacent is laid is connected
It connects, forms closed circuit, the master controller connects each conductive wire.
Above-mentioned knitting skill is the prior art, and makes to may be implemented, it is specific weave process just no longer in the present embodiment into
Row repeats.
In the third embodiment, can be consistent for the set-up mode of erasable liquid crystal writing film, include: using liquid crystal film
The first conductive layer, liquid crystal layer and the second conductive layer successively arranged from top to bottom；Its of first conductive layer or the second conductive layer
In a conductive region for being divided into two or more mutually insulateds；The conductive region of first conductive layer and the second conduction
Erasing region is collectively formed in lap liquid crystal layer region corresponding with the part of the layer in space.
It is fully disconnected two conductive regions to form mutually insulated between two neighboring conductive region, realizes mutually insulated
Mode preferably using etch by the way of, alternatively, using those skilled in the art it is conceivable that other implementations.
When being divided by etched line to the first conductive layer, the shape of etched line is unlimited, is formed by conductive region
Shape is determined according to etching wire shaped and arrangement mode.Preferable scheme is that conductive layer guarantees each conduction region when being divided
Domain at least should include a part at the conductive layer edge, be attached convenient for each conductive region and external circuit structure.
Preferably, the width of conductive region is 1mm-15mm.The range can improve while guaranteeing to wipe effect to be made
With the balance in service life, the balance between the display effect of writing film and service life is realized.
It is, of course, also possible to there is other embodiments.
As the conductive metal mesh in embodiment three is replaced with conductive fiber unlike embodiment three by example IV
Net, conducting fibrous web include multiple conductive fibers, and the conductive fiber that every two is disposed adjacent can be configured to receive external
The closed circuit of electromagnetic signal, closed circuit connect master controller, and received electromagnetic signal is converted into positioning letter by master controller
Number.
Conductive fiber includes one group of conducting wire of first direction and one group of conductive fiber of second direction, and above-mentioned two groups conductive fine
It ties up mutually insulated and forms conducting fibrous web in space.
Embodiment five
Unlike example IV, positioned in such a way that conductive film is set above liquid crystal writing film, and with
Unlike embodiment two, three, liquid crystal writing film can be liquid crystal writing film that is existing, can be realized selective erase.
Specifically, a kind of selective erase electromagnetic positioning system, including liquid crystal writing film, master controller and conductive film, in which:
The front or the back side of liquid crystal writing film is arranged in conductive film；
Conductive film includes the first conductive layer, the second conductive layer；
First conductive layer or the second conductive layer are divided into the conductive region of at least two groups mutually insulated, first group of conduction region
The maximum width in domain is less than setting value A, and the minimum widith of second group of conductive region is greater than the set value B, and A is less than B, and two groups conductive
Region is spaced apart, and same group of conductive region is non-conterminous；
First group of conductive region can be configured to connect as signal receiving area, first group of neighbouring conductive region of every two
The closed circuit of extraneous electromagnetic signals is received, the closed circuit connects master controller, and master controller turns received electromagnetic signal
Change positioning signal into.
It is of course also possible to not use the form of layering, but conductive film is carried out to the cutting of width conductive bar, so that conductive
Film is divided into the conductive region of at least two groups mutually insulated, and the maximum width of first group of conductive region is less than setting value A, and second
The minimum widith of group conductive region is greater than the set value B, and A is less than B, and two groups of conductive regions are spaced apart, and same group of conductive region is not
It is adjacent；
First group of conductive region can be configured to connect as signal receiving area, first group of neighbouring conductive region of every two
The closed circuit of extraneous electromagnetic signals is received, the closed circuit connects master controller, and master controller turns received electromagnetic signal
Change positioning signal into.
Technical solution provided by the utility model has a wide range of applications field, adaptable field include: board,
Luminous energy board, luminous energy liquid crystal handwriting pad, the big liquid crystal writing blackboard of luminous energy, luminous energy dust-free writing board, luminous energy Portable blackboard, electronics
Drawing board, lcd electronic writing plate, electronic handwritten plate, electronic recording notebook, drawing pad, children's handwriting pad, allowing child daubing drawing board,
Erasing rubber function sketching board, liquid crystal electron drawing boards, color liquid crystal handwriting pad etc..
In order to enable reader more understands the concrete scheme of the utility model, following Application Example is provided.
The first Application Example, a kind of handwriting pad, the handwriting pad include the selective erase electromagnetism in above-mentioned several schemes
Positioning system；Board further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character simultaneously stores；
As more preferred scheme, board further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character simultaneously stores；
Handwriting trace information or standard character are sent to outside for being communicated with external equipment by communication unit
Equipment.
Matched, the erasing part for forming the writing part of handwriting trace or capableing of erasing writing writing has and can send out
The function of radio magnetostatic wave signal.
Preferably, several electromagnetic wave signal transmitters can be set in the edge of erasing part such as erasing part, with
It determines the size of erasing part, and then assists carrying out the determination of erasing area size and position.
Second of Application Example, a kind of blackboard, the blackboard include above-mentioned selective erase electromagnetic positioning system；Blackboard is also
Include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character simultaneously stores；
More preferably, blackboard further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character simultaneously stores；
Handwriting trace information or standard character are sent to outside for being communicated with external equipment by communication unit
Equipment.
Matched, the erasing part for forming the writing part of handwriting trace or capableing of erasing writing writing has and can send out
The function of radio magnetostatic wave signal.
Preferably, several electromagnetic wave signal transmitters can be set in the edge of erasing part such as erasing part, with
It determines the size of erasing part, and then assists carrying out the determination of erasing area size and position.
The third Application Example discloses a kind of drawing board, which includes above-mentioned selective erase electromagnetic positioning system；It draws
Plate further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character simultaneously stores；
More preferably, drawing board further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard for handwriting trace
Character simultaneously stores；
Handwriting trace information or standard character are sent to outside for being communicated with external equipment by communication unit
Equipment.
Matched, the erasing part for forming the writing part of handwriting trace or capableing of erasing writing writing has and can send out
The function of radio magnetostatic wave signal.
Preferably, several electromagnetic wave signal transmitters can be set in the edge of erasing part such as erasing part, with
It determines the size of erasing part, and then assists carrying out the determination of erasing area size and position.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but it is not practical new to this
The limitation of type protection scope, those skilled in the art should understand that, based on the technical solution of the present invention, ability
Field technique personnel do not need to make the creative labor the various modifications or changes that can be made still in the protection model of the utility model
Within enclosing.
Claims (13)
1. a kind of selective erase electromagnetic positioning system, including liquid crystal writing film and master controller, in which:
The liquid crystal writing film includes the first conductive layer, liquid crystal layer and the second conductive layer；
It is characterized in that: first conductive layer or the second conductive layer are divided into the conductive region of at least two groups mutually insulated, the
The maximum width of one group of conductive region is less than setting value A, and the minimum widith of second group of conductive region is greater than the set value B, and A is less than B,
Two groups of conductive regions are spaced apart, and same group of conductive region is non-conterminous；
As signal receiving area, first group of neighbouring conductive region of every two can be configured to receive outer first group of conductive region
The closed circuit of portion's electromagnetic signal, the closed circuit connect master controller, and received electromagnetic signal is converted by master controller
Positioning signal.
2. selective erase electromagnetic positioning system, including liquid crystal writing film and master controller, in which:
The liquid crystal writing film includes the first conductive layer, liquid crystal layer and the second conductive layer；
It is characterized in that: first conductive layer and the second conductive layer are each split into the conductive region of at least two groups mutually insulated,
The maximum width of first group of conductive region is less than setting value A, and the minimum widith of second group of conductive region is greater than the set value B, and A is less than
B, two groups of conductive regions are spaced apart, and same group of conductive region is non-conterminous；
As signal receiving area, first group of neighbouring conductive region of every two can be configured to receive outer first group of conductive region
The closed circuit of portion's electromagnetic signal, the closed circuit connect master controller, and received electromagnetic signal is converted by master controller
Positioning signal.
3. a kind of selective erase electromagnetic positioning system as claimed in claim 2, it is characterized in that: first conductive layer or second
Conductive layer is divided into two or more strip-shaped conductive regions of mutually insulated.
4. a kind of selective erase electromagnetic positioning system as claimed in claim 3, it is characterized in that: first conductive layer is respectively led
Electric region is distributed along first direction, is parallel to each other；Each conductive region of second conductive layer is distributed in a second direction, mutually flat
Row, first direction and second direction are spatially interlaced；
Further, the first direction is vertical with second direction.
5. a kind of selective erase electromagnetic positioning system as claimed in claim 2, it is characterized in that: first conductive layer is respectively led
Electric region at least should include a part at first conductive layer edge；Each conductive region of second conductive layer should at least wrap
The a part at the edge containing second conductive layer；
Further, of same size, the width of second group of conductive region of first group of conductive region on first conductive layer
It is identical；First group of conductive region on second conductive layer it is of same size, second group of conductive region it is of same size；
Further, the width of first group of conductive region on first conductive layer, with first on second conductive layer
Organize the of same size of conductive region.
6. a kind of selective erase electromagnetic positioning system as claimed in claim 2, it is characterized in that: first conductive layer and second
Insulating layer is equipped in conductive layer between at least one conductive layer and liquid crystal layer.
7. a kind of selective erase electromagnetic positioning system, including liquid crystal writing film, master controller and conductive mesh, in which:
It is characterized in that: the conductive mesh is set to the back side of liquid crystal writing film, conductive mesh includes multiple conducting wires, and every two is adjacent to be set
The conducting wire set can be configured to receive the closed circuit of extraneous electromagnetic signals, and the closed circuit connects master controller, main
Received electromagnetic signal is converted into positioning signal by controller.
8. a kind of selective erase electromagnetic positioning system as claimed in claim 7, it is characterized in that: the conductive mesh includes first party
To one group of conducting wire and second direction one group of conducting wire, above-mentioned two groups of conducting wire mutually insulateds and space crossed in netted；
Further, the conductive mesh is that conducting wire weaves.
9. a kind of selective erase electromagnetic positioning system, including liquid crystal writing film, master controller and conductive film, in which:
It is characterized in that: the front or the back side of liquid crystal writing film is arranged in conductive film；
The conductive film includes the first conductive layer, the second conductive layer；
First conductive layer or the second conductive layer are divided into the conductive region of at least two groups mutually insulated, first group of conduction region
The maximum width in domain is less than setting value A, and the minimum widith of second group of conductive region is greater than the set value B, and A is less than B, two groups of conduction regions
Domain is spaced apart, and same group of conductive region is non-conterminous；
As signal receiving area, first group of neighbouring conductive region of every two can be configured to receive outer first group of conductive region
The closed circuit of portion's electromagnetic signal, the closed circuit connect master controller, and received electromagnetic signal is converted by master controller
Positioning signal.
10. a kind of selective erase electromagnetic positioning system, including liquid crystal writing film, master controller and conductive film, in which:
It is characterized in that: the front or the back side of liquid crystal writing film is arranged in conductive film；
The conductive film is divided into the conductive region of at least two groups mutually insulated, and the maximum width of first group of conductive region is less than
Setting value A, the minimum widith of second group of conductive region are greater than the set value B, and A is less than B, and two groups of conductive regions are spaced apart, same
Group conductive region is non-conterminous；
As signal receiving area, first group of neighbouring conductive region of every two can be configured to receive outer first group of conductive region
The closed circuit of portion's electromagnetic signal, the closed circuit connect master controller, and received electromagnetic signal is converted by master controller
Positioning signal.
11. a kind of handwriting pad, it is characterized in that: the handwriting pad includes such as selective erase electricity of any of claims 1-10
Magnetic orientation system；Further,
The handwriting pad further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard character for handwriting trace
And it stores；
Further, the handwriting pad further include:
Handwriting trace information or standard character are sent to outer by communication unit for being communicated with external equipment or cloud
Portion's equipment.
12. a kind of blackboard, it is characterized in that: the blackboard includes as selective erase electromagnetism of any of claims 1-10 is fixed
Position system；
Further,
The blackboard further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard character for handwriting trace
And it stores；
Further, the blackboard further include:
Handwriting trace information or standard character are sent to outer by communication unit for being communicated with external equipment or cloud
Portion's equipment.
13. a kind of drawing board, it is characterized in that: the drawing board includes as selective erase electromagnetism of any of claims 1-10 is fixed
Position system；
Further,
The drawing board further include:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard character for handwriting trace
And it stores；
Further, the drawing board further include:
Handwriting trace information or standard character are sent to outer by communication unit for being communicated with external equipment or cloud
Portion's equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820997990.4U CN208569264U (en) | 2018-06-26 | 2018-06-26 | Selective erase electromagnetic positioning system and handwriting pad, blackboard and drawing board including it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820997990.4U CN208569264U (en) | 2018-06-26 | 2018-06-26 | Selective erase electromagnetic positioning system and handwriting pad, blackboard and drawing board including it |
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| Publication Number | Publication Date |
|---|---|
| CN208569264U true CN208569264U (en) | 2019-03-01 |
Family
ID=65488237
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820997990.4U Withdrawn - After Issue CN208569264U (en) | 2018-06-26 | 2018-06-26 | Selective erase electromagnetic positioning system and handwriting pad, blackboard and drawing board including it |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109901331A (en) * | 2019-03-20 | 2019-06-18 | 深圳市恒开源电子有限公司 | Liquid crystal handwriting pad and liquid crystal tablet system |
| CN110147016A (en) * | 2018-06-26 | 2019-08-20 | 山东蓝贝思特教装集团股份有限公司 | Selective erase electromagnetic positioning system and its method |
| 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 |
-
2018
- 2018-06-26 CN CN201820997990.4U patent/CN208569264U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110147016A (en) * | 2018-06-26 | 2019-08-20 | 山东蓝贝思特教装集团股份有限公司 | Selective erase electromagnetic positioning system and its method |
| CN110147016B (en) * | 2018-06-26 | 2023-06-09 | 山东蓝贝思特教装集团股份有限公司 | Local erasing electromagnetic positioning system and method thereof |
| CN109901331A (en) * | 2019-03-20 | 2019-06-18 | 深圳市恒开源电子有限公司 | Liquid crystal handwriting pad and liquid crystal tablet system |
| 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 |
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