CN208367361U - A kind of writing film, board, blackboard and the drawing board of achievable selective erase - Google Patents
A kind of writing film, board, blackboard and the drawing board of achievable selective erase Download PDFInfo
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- CN208367361U CN208367361U CN201820830342.XU CN201820830342U CN208367361U CN 208367361 U CN208367361 U CN 208367361U CN 201820830342 U CN201820830342 U CN 201820830342U CN 208367361 U CN208367361 U CN 208367361U
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Abstract
The utility model discloses writing film, board, blackboard and the drawing boards of a kind of achievable selective erase, comprising: the first conductive layer, liquid crystal layer and the second conductive layer successively arranged；First conductive layer or the second conductive layer one of them be divided into the conductive region of two or more mutually insulateds；The part that conductive region, liquid crystal layer and undivided conductive layer are overlapped jointly is erasable region.Alternatively, the first conductive layer and the second conductive layer are each split into the conductive region of two or more mutually insulateds；Erasing 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.The utility model is the utility model has the advantages that can be realized the regional area erasing for written contents, and other regions are not influenced then by erasing, the deficiency all wiped can only be realized by overcoming traditional technology, the working efficiency and usage experience of user are improved, the commercial value of liquid crystal writing film and its application apparatus is improved.
Description
Technical field
The utility model relates to liquid crystal writing technical field of membrane, more particularly to a kind of writing of achievable selective erase
Film, board, blackboard and drawing board.
Background technique
Liquid crystal writing film described in this patent and common liquid crystal display film and plasma show film in liquid crystal components, work
Make principle, application range, usage mode etc. and there is significant difference, especially in terms of writing, common liquid crystal display
Film and plasma show that film cannot achieve impression and write and wipe trace.
Liquid crystal writing film on the market at present, its working principle is that using the bistable characteristic of liquid crystal realize display and/or
Wipe the written contents on liquid crystal board.Such as using cholesteric liquid crystal as writing film, by acting on liquid crystal board
Pressure record the writing pressure trajectories of lettering pen, and then show corresponding written contents；Make cholesteric phase by applying electric field
Liquid crystal structure changes, and so that the writing pressure trajectories on liquid crystal board is disappeared to realize erasing.
The existing product using liquid crystal writing film is only capable of using the power on mode and realize entirely when carrying out handwriting erasing
The erasing of all person's handwritings in liquid crystal writing plate, when only needing erasing part writing such as user, then existing energization erasing mode can not
Meet needs, when especially modifying to the vicious part of writing, existing entirety erasing mode will will cause remaining not
The loss of modification information is needed, the mode that how to use the power on realizes that part wipes, becomes user's problem in the urgent need to address.
Utility model content
First purpose of the utility model is the writing film for disclosing a kind of achievable selective erase, which utilizes part
Selective erase can be realized in electric field, and erasing speed is fast, and with wiping with writing, timeliness is good, selective erase and writing it is high-efficient.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of writing film of achievable selective erase, comprising:
The first conductive layer, liquid crystal layer and the second conductive layer successively arranged；
First conductive layer or the second conductive layer one of them be divided into leading for two or more mutually insulateds
Electric region；
The part that the conductive region, liquid crystal layer and undivided conductive layer are overlapped jointly is erasable region.
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.
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, each conductive region is of same size；The mode equidistantly divided, so that segmentation is more uniform,
Erasing region can effectively be controlled；Also, spacing is smaller, and selective erase accuracy is higher.
Further, the width of the conductive region is 1mm-15mm.The range can be while guaranteeing to wipe effect
The balance improved service life realizes the balance between the display effect of writing film and service life.
Second purpose of the utility model is to disclose another to realize the writing film of selective erase, comprising:
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 two or more mutually insulateds；
Lap with the part corresponding liquid of the conductive region of first conductive layer and the second conductive layer in space
Erasing region is collectively formed in crystal layer region.
Upper layer and lower layer conductive layer is split respectively, can be applied in the different conductive regions of upper and lower two conductive layer in this way
Add different voltage, electric field controls mode is more flexible, while improving the accuracy of selective erase.
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；
Further, 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 is 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, the conductive region on first conductive layer is of same size；Conduction on second conductive layer
Region it is of same size.
Further, the width of the conductive region is 1mm-15mm.
Further, on the base layer by least one setting in the first conductive layer and the second conductive layer.Basal layer energy
Supporting role enough is played for conductive layer, improves writing film overall stability.
Further, at least one in first conductive layer or the second conductive layer is equipped with insulating layer with liquid crystal interlayer.
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 board, which includes above-mentioned achievable selective erase
Writing film.
Further,
The 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 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.
4th purpose of the utility model is to disclose a kind of blackboard, which includes the book of above-mentioned achievable selective erase
Write film.
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:
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.
5th purpose of the utility model is to disclose a kind of drawing board, which includes the book of above-mentioned achievable selective erase
Write film.
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:
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.
Can be achieved selective erase writing film compared with prior art, the utility model has the beneficial effects that
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 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, lcd electronic writing plate, electronic handwritten plate, electricity
Son account 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..
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 the writing membrane structure diagram one of the utility model embodiment one；
Fig. 2 is the writing membrane structure diagram two of the utility model embodiment one；
Fig. 3 is the writing membrane structure diagram of the utility model embodiment two；
Fig. 4 is the schematic diagram of conductive layer structure that the utility model has etched line.
Specific embodiment
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.
Embodiment one
The utility model embodiment can not achieve selective erase to solve liquid crystal writing film existing in the prior art
Technical problem proposes a kind of writing film of achievable selective erase, comprising: the first conductive layer for successively arranging from top to bottom,
Liquid crystal layer and the second conductive layer；One of them of first conductive layer or the second conductive layer are divided into two or more phases
The conductive region mutually to insulate；The lap of the conductive region of first conductive layer and the second conductive layer in space is corresponding with the part
Liquid crystal layer region be collectively formed erasing region.
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.
Fig. 1 gives one of embodiment of writing film: the first conductive layer, which is divided into four shown in figure, leads
Electric region, 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；The first conductive region, the second conductive region, third conduction region on first conductive layer
Domain and the 4th conductive region distinguish the overlapped part of the second conductive layer and form first partial erasing region, the second selective erase
Region, third selective erase region and the 4th erasing region.
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.
In view of the processing technology of writing film and the complexity of conductive region lead, the first conductive layer is divided into band
Shape conductive region；Further, each strip-shaped conductive region is parallel to each other.Be conducive to improve processing efficiency, reduce process costs,
Convenient for batch production.
Fig. 2 gives a kind of more preferred embodiment of writing film: the first conductive layer, which is divided into three, mutually puts down
Capable strip-shaped conductive region, the second conductive layer are not divided；Conductive region and the second conductive layer on first conductive layer is overlapped
Part formed first erasing region, second erasing region and third wipe region.
Each conductive region on first conductive layer is passed through into electrode and corresponding conducting wire and voltage application device respectively
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, in order to apply voltage for the second conductive layer.
For on the first conductive layer each conductive region and the second conductive layer apply voltage respectively, in this way in the first scratching area
Domain, the second erasing region and third erasing region can be respectively formed the superposition of electric field, be formed using in each erasing region
Different electric fields realize selective erases.
The division for only carrying out conductive region in the present embodiment on a wherein conductive layer, is formed by selective erase region
Area is determined by conductive region, it is generally the case that selective erase area is larger, is suitable for large area selective erase equipment.
Embodiment two
The utility model embodiment can not achieve selective erase to solve liquid crystal writing film existing in the prior art
Technical problem proposes a kind of writing film of achievable selective erase, comprising: the first conductive layer for successively arranging from top to bottom,
Liquid crystal layer and the second conductive layer；Wherein, it is mutually exhausted to be divided into two or more for the first conductive layer and the second conductive layer
The conductive region of the conductive region of edge, the first conductive layer and the second conductive layer is spatially interlaced, and each conductive region is in sky
Between lap liquid crystal layer region corresponding with the part be collectively formed erasing region, realize selective erase.
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.
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.Each conductive region on second conductive layer is passed through into electrode
And corresponding conducting wire is electrically connected with voltage application device respectively, in order to apply voltage for the second conductive layer.
Apply voltage respectively for each conductive region on the first conductive layer and the second conductive layer, in this way in each erasing region energy
It is enough respectively formed the superposition of electric field, using the different pressure differences formed in each erasing region, realizes selective erase.
It is fully disconnected to form the two of mutually insulated between two neighboring conductive region on first conductive layer and the second conductive layer
A conductive region；The mode of mutually insulated is realized preferably by the way of etching, alternatively, can using those skilled in the art
The other implementations expected.
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.
As preferred embodiment, as shown in figure 3, the first conductive layer is divided into several transverse conductances in the present embodiment
Second conductive layer is divided into several longitudinal conductive regions by region, and each conductive region is equidistant；On first conductive layer
Conductive region and the conductive region on the second conductive layer be spatially be mutually perpendicular to it is staggered；Conduction on first conductive layer
Region forms erasing region with the overlapped part of the conductive region on the second conductive layer.
In Fig. 3, by the division to conductive layer, writing film is divided into reticular structure, each grid is a list
Only erasing region；This partitioning scheme is convenient for industrialized batch machining, while can make cut zone according to actual needs
It more minimizes, by the energization to different conductive strips, realizes more accurate selective erase.
Carry out the division of conductive region, the face in the selective erase region of formation in the present embodiment respectively to upper and lower two conductive layer
Product is determined by the interlaced area of conductive region spatially in upper and lower two conductive layer, it is generally the case that selective erase area is smaller,
It is high to wipe precision, especially suitable for the selective erase equipment compared with small area.
Embodiment three
The utility model embodiment is further excellent to the structure of writing film on the basis of embodiment one or embodiment two
Change, comprising: on the base layer by least one setting in the first conductive layer and the second conductive layer.Such as: the first conductive layer is set
It sets in the first substrate or the second conductive layer is arranged in the second substrate, alternatively, two conductive layers are arranged at corresponding base
On.
Alternatively,
Insulating layer is arranged at least one in first conductive layer or the second conductive layer and liquid crystal interlayer.Such as: first
Insulating layer is arranged in conductive layer and liquid crystal interlayer；Alternatively, insulating layer is arranged in the second conductive layer and liquid crystal interlayer；Alternatively, first
The first insulating layer is arranged in conductive layer and liquid crystal interlayer, and second insulating layer is arranged in the second conductive layer and liquid crystal interlayer.
Good supporting role can be played to two conductive layers by increasing basal layer, convenient for writing the monolithic stability of membrane structure.
Increase the mutually insulated that two conductive layers and liquid crystal layer can be better achieved in insulating layer, certain protection is played to liquid crystal layer and is made
With extension writing film service life.
Example IV
For the utility model embodiment on the basis of embodiment one or embodiment two or embodiment three, disclosing can be real
The concrete application product of the writing film of existing selective erase, such as:
The writing film of the achievable selective erase of the utility model is applied on board, realizes that the part of board is wiped
Except function.
Further, the existing liquid crystal board remembered, for example, being incuded when writing by resistance type touch control screen
Pressure calculates pressure position, feeds back simultaneously pen trace track, realizes the storage of handwriting trace；Alternatively, converting handwriting trace to
Standard character is stored.
The writing film of the achievable selective erase of the utility model is applied to the above-mentioned liquid crystal board remembered, is realized
The function of selective erase.
Further, communication unit is set on the above-mentioned board that there is selective erase function simultaneously with memory function
Member is communicated by way of wired or wireless communication with external equipment.
External equipment can be the mobile terminals such as mobile phone, PAD, and being also possible to PC machine or those skilled in the art can think
The other equipment terminal arrived.
Similarly, the writing film of the achievable selective erase of the utility model can also be applied to other blackboards that can be remembered
Perhaps on drawing board and the handwriting trace information or standard character of storage can be sent to external equipment by communication unit.
Alternatively embodiment writes the writing film of the achievable selective erase of the utility model applied to luminous energy
Letter stencil, 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, electronic drawing board,
Lcd electronic writing plate, electronic handwritten plate, electronic recording notebook, drawing pad, children's handwriting pad, allowing child daubing drawing board, rubber
Wipe function sketching board, other that liquid crystal electron drawing boards or color liquid crystal handwriting pad or those skilled in the art can be known
In Related product, to realize the selective erase function of the said goods.
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.
Claims (11)
1. a kind of writing film of achievable selective erase characterized by comprising
The first conductive layer, liquid crystal layer and the second conductive layer successively arranged；
First conductive layer or the second conductive layer one of them be divided into the conduction region of two or more mutually insulateds
Domain；
The part that the conductive region, liquid crystal layer and undivided conductive layer are overlapped jointly is erasable region.
2. a kind of writing film of achievable selective erase as described in claim 1, which is characterized in that each conductive region is
Strip-shaped conductive region.
3. a kind of writing film of achievable selective erase as claimed in claim 2, which is characterized in that each strip-shaped conductive area
Domain is parallel to each other.
4. a kind of writing film of achievable selective erase as described in claim 1, which is characterized in that each conductive region is extremely
It less should include a part at its said conductive layer edge.
5. a kind of writing film of achievable selective erase as described in claim 1, which is characterized in that each conductive region
It is of same size.
6. a kind of writing film of achievable selective erase as claimed in claim 5, which is characterized in that the width of conductive region is
1mm-15mm。
7. a kind of writing film of achievable selective erase as described in claim 1, which is characterized in that by the first conductive layer and the
At least one in two conductive layers is arranged on the base layer.
8. a kind of writing film of achievable selective erase as described in claim 1, which is characterized in that first conductive layer or
At least one in second conductive layer is equipped with insulating layer with liquid crystal interlayer.
9. a kind of board, which is characterized in that the writing including the described in any item achievable selective erases of claim 1-8
Film；
Further,
The 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 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；
Handwriting trace information or standard character are sent to external equipment for being communicated with external equipment by communication unit.
10. a kind of blackboard, which is characterized in that the writing film including the described in any item achievable selective erases of claim 1-8；
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:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard character for handwriting trace
And it stores；
Handwriting trace information or standard character are sent to external equipment for being communicated with external equipment by communication unit.
11. a kind of drawing board, which is characterized in that the writing film including the described in any item achievable selective erases of claim 1-8,
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:
Person's handwriting storage unit, for directly recording and storing handwriting trace information；Alternatively, converting standard character for handwriting trace
And it stores；
Handwriting trace information or standard character are sent to external equipment for being communicated with external equipment by communication unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820830342.XU CN208367361U (en) | 2018-05-30 | 2018-05-30 | A kind of writing film, board, blackboard and the drawing board of achievable selective erase |
| CN201821887465.3U CN209014854U (en) | 2018-05-30 | 2018-05-30 | A kind of writing film, handwriting pad, blackboard and the drawing board of achievable selective erase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820830342.XU CN208367361U (en) | 2018-05-30 | 2018-05-30 | A kind of writing film, board, blackboard and the drawing board of achievable selective erase |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821887465.3U Division CN209014854U (en) | 2018-05-30 | 2018-05-30 | A kind of writing film, handwriting pad, blackboard and the drawing board of achievable selective erase |
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| Publication Number | Publication Date |
|---|---|
| CN208367361U true CN208367361U (en) | 2019-01-11 |
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| CN201821887465.3U Active CN209014854U (en) | 2018-05-30 | 2018-05-30 | A kind of writing film, handwriting pad, blackboard and the drawing board of achievable selective erase |
| CN201820830342.XU Active CN208367361U (en) | 2018-05-30 | 2018-05-30 | A kind of writing film, board, blackboard and the drawing board of achievable selective erase |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108563049A (en) * | 2018-05-30 | 2018-09-21 | 山东蓝贝思特教装集团股份有限公司 | A kind of writing film of achievable selective erase and application |
| CN109683372A (en) * | 2019-01-30 | 2019-04-26 | 深圳市恒开源电子有限公司 | A kind of liquid crystal diaphragm and liquid crystal writing device with selective erase function |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115268146A (en) * | 2022-07-06 | 2022-11-01 | 山东蓝贝思特教装集团股份有限公司 | Bistable liquid crystal writing device based on high-temperature-resistant hard substrate |
-
2018
- 2018-05-30 CN CN201821887465.3U patent/CN209014854U/en active Active
- 2018-05-30 CN CN201820830342.XU patent/CN208367361U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108563049A (en) * | 2018-05-30 | 2018-09-21 | 山东蓝贝思特教装集团股份有限公司 | A kind of writing film of achievable selective erase and application |
| CN109683372A (en) * | 2019-01-30 | 2019-04-26 | 深圳市恒开源电子有限公司 | A kind of liquid crystal diaphragm and liquid crystal writing device with selective erase function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN209014854U (en) | 2019-06-21 |
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