CN209821567U - Liquid crystal writing pad capable of being partially erased and erasing equipment - Google Patents
Liquid crystal writing pad capable of being partially erased and erasing equipment Download PDFInfo
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- CN209821567U CN209821567U CN201920178285.6U CN201920178285U CN209821567U CN 209821567 U CN209821567 U CN 209821567U CN 201920178285 U CN201920178285 U CN 201920178285U CN 209821567 U CN209821567 U CN 209821567U
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Abstract
The utility model discloses a liquid crystal handwriting pad that can locally erase and erasing equipment matched with the same, the liquid crystal handwriting pad comprises a liquid crystal handwriting screen and a power circuit, the liquid crystal handwriting screen comprises a first diaphragm and a second diaphragm, the first diaphragm and the second diaphragm are arranged oppositely, one sides of the first diaphragm and the second diaphragm which are opposite are both provided with conducting layers, and a liquid crystal molecular layer is arranged between the conducting layers of the first diaphragm and the second diaphragm; the conducting layer of one of the first membrane or the second membrane is divided into a plurality of square conducting areas which are insulated with each other, and an electrode is led out of the conducting layer of the other membrane and is connected with the power circuit through the electrode so as to provide working power for the liquid crystal handwriting screen. The utility model discloses but writing on the handwriting on the liquid crystal handwriting pad that local erasure can be realized to local erasure, improves user experience.
Description
Technical Field
The utility model relates to a technical field is write to the liquid crystal, especially relates to a but liquid crystal handwriting pad of local erasure and erasing equipment.
Background
The handwriting board is a product which can meet the writing requirements of users and has the advantages of portability, clear handwriting display, repeated writing and the like. When writing, a user applies certain pressure to the handwriting board, the pressure can enable liquid crystal molecules in the handwriting board to deflect, the liquid crystal molecules are enabled to present different colors, and therefore the effect of enabling the handwriting board to display handwriting is achieved.
When a user needs to erase the writing content on the handwriting board, voltage is applied to the handwriting board to generate an electric field, and liquid crystal molecules in the handwriting board deflect in the electric field and restore to an ordered state, so that the writing on the handwriting board is eliminated. In the prior art, all handwriting is cleared by one key, and the problem of local erasing cannot be realized, so that the use of the handwriting board is limited to a certain extent.
In view of the above, there is a need to provide a partially erasable handwriting board with a partial erasing function and an erasing apparatus, which can solve the above-mentioned drawbacks, so as to implement partial erasing of written characters on the handwriting board and improve user experience.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a but local erasing's handwriting pad and erasing equipment improve user experience in order to realize that the local erasing writes the writing on the handwriting pad with local erasing function is provided.
In order to solve the technical problem, the utility model discloses a as follows technical scheme: a liquid crystal handwriting board capable of being partially erased comprises a liquid crystal handwriting screen and a power circuit; the liquid crystal handwriting screen comprises a first membrane and a second membrane arranged opposite to the first membrane, conductive layers are formed on the opposite sides of the first membrane and the second membrane, and a liquid crystal molecular layer is arranged between the conductive layers of the first membrane and the second membrane; the conducting layer of one of the first membrane or the second membrane is divided into a plurality of square conducting areas which are insulated with each other, and an electrode is led out of the conducting layer of the other membrane and is connected with the power circuit through the electrode so as to provide working power for the liquid crystal handwriting screen.
The further technical scheme is as follows: the conducting layers of the first diaphragm and the second diaphragm are ITO layers, the first diaphragm is arranged above the second diaphragm, the ITO layers of the first diaphragm serve as the bottom surface of the first diaphragm, and the ITO layers of the second diaphragm serve as the top surface of the second diaphragm.
The further technical scheme is as follows: the first diaphragm and the second diaphragm both comprise PET film layers, the PET film layer of the first diaphragm is arranged on the upper surface of the ITO layer of the first diaphragm, and the PET film layer of the second diaphragm is arranged on the lower surface of the ITO layer of the second diaphragm and serves as the bottom surface of the second diaphragm.
The further technical scheme is as follows: the first diaphragm further comprises a protective film layer, and the protective film layer is arranged on the upper surface of the PET film layer of the first diaphragm and serves as the top surface of the first diaphragm.
The further technical scheme is as follows: the power supply circuit comprises a storage battery, the liquid crystal handwriting board is provided with a charging port and a charging management circuit, the input end of the charging management circuit is connected with the charging port, and the output end of the charging management circuit is connected with the power supply circuit so as to charge the storage battery of the power supply circuit.
For solving the technical problem, the utility model also provides an erase equipment, its with but the supporting use of local erasure's liquid crystal handwriting pad, erase equipment through insulating power cord with the power supply circuit of liquid crystal handwriting pad connects, the inside of erasing equipment is provided with boost circuit, boost circuit with power supply circuit connects to carry out the high-voltage electricity signal of output after the processing of stepping up to the signal of telecommunication.
The further technical scheme is as follows: one side of erasing the equipment is provided with the buffer layer, the surface of buffer layer be used for with the contact of liquid crystal handwriting pad, the internal surface of buffer layer is provided with metal conducting block and key switch, key switch with boost circuit connects in order to control boost circuit's work, the metal block with boost circuit's output is connected in order to transmit the high-voltage electricity signal after will stepping up to liquid crystal handwriting screen.
The utility model has the advantages of: the liquid crystal handwriting board is characterized in that the conducting layer of one of the two diaphragms of the liquid crystal handwriting screen is divided to form a plurality of conducting areas which are insulated from each other, an erasing electric field is formed by controlling the voltage of each conducting area, the writing of the corresponding conducting area is locally erased, the rest areas are not erased, the defect that the traditional technology can only realize complete erasing is overcome, the working efficiency and the use experience of a user are improved, and the commercial value of the liquid crystal handwriting board is improved. The utility model discloses erase equipment through the power supply circuit who sets up boost circuit cooperation liquid crystal handwriting pad in order to provide high pressure extremely the liquid crystal handwriting screen of liquid crystal handwriting pad to make the regional production that erases needs erase and erase the electric field, realize the local erasing.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention for partially erasing a liquid crystal writing pad and erasing device.
Fig. 2 is a schematic structural diagram of the first diaphragm and the second diaphragm of the liquid crystal handwriting screen of the liquid crystal handwriting board capable of being partially erased according to the present invention.
Fig. 3 is a schematic structural diagram of the film layer of the liquid crystal handwriting screen of the liquid crystal handwriting board of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples.
Referring to fig. 1 to 3, in the present embodiment, the liquid crystal handwriting pad capable of being partially erased includes a liquid crystal handwriting screen 10 and a power circuit 100, the liquid crystal handwriting screen 10 includes a first film 110 and a second film 120 disposed opposite to the first film 110, conductive layers are formed on opposite sides of the first film 110 and the second film 120, the conductive layers are a first conductive layer 111 and a second conductive layer 121, a liquid crystal molecular layer 130 is disposed between the first conductive layer 111 and the second conductive layer 121, and the liquid crystal molecular layer 130 is disposed between the first film 110 and the second film 120. Preferably, in this embodiment, the conductive layer of the first diaphragm 110, i.e. the first conductive layer 111, is divided into a plurality of square conductive areas insulated from each other, and the conductive layer of the second diaphragm 120, i.e. the second conductive layer 121, is led out to form an electrode 1211, and is connected to the power circuit 100 through the electrode 1211 to provide a working power supply for the liquid crystal handwriting screen 10. The square conductive region of the first conductive layer 111 of the first membrane 110, the liquid crystal molecular layer 130, and the second conductive layer 121 of the second conductive layer 120 overlap each other to form an erasable region. The electrode of the second conductive layer 121 is connected to a power supply circuit so as to apply a voltage to the liquid crystal handwriting screen 10, and an electric field is formed between the first conductive layer 111 and the second conductive layer 121 by applying the voltage. In particular, the sides of the square conductive areas may be 5-15mm in length. Of course, in other embodiments, the second conductive layer 121 is divided into a plurality of square conductive regions insulated from each other, an electrode is led out from the first conductive layer 111 and connected to the power circuit 100 through the electrode, a portion where the square conductive regions of the first conductive layer 111 of the first membrane 110, the liquid crystal molecular layer 130, and the second conductive layer 121 of the second conductive layer 120 overlap together is an erasable region, and the rest of the structure and the function are the same as those of this embodiment.
With reference to fig. 3, in the present embodiment, the conductive layers of the first diaphragm 110 and the second diaphragm 120 are ITO layers, the first conductive layer 111 and the second conductive layer 121 are ITO layers, the first diaphragm 110 is disposed above the second diaphragm 120, the conductive layer, i.e., the ITO layer, of the first diaphragm 110 serves as the bottom surface of the first diaphragm 110, and the conductive layer, i.e., the ITO layer, of the second diaphragm 120 serves as the top surface of the second diaphragm 120. Wherein ITO represents conductive glass. Specifically, the first diaphragm 110 and the second diaphragm 120 each include a PET film layer, which is a first PET film layer 112 and a second PET film layer 122, respectively, the first PET film layer 112 is disposed on an ITO layer of the first diaphragm 110, i.e., an upper surface of the first conductive layer 111, and the second PET film layer 122 is disposed on a lower surface of the ITO layer of the second diaphragm 120, i.e., a lower surface of the second conductive layer 121, and serves as a bottom surface of the second diaphragm 120. Wherein, PET stands for polyethylene terephthalate, and the PET film layer can adopt PET material with impedance.
Specifically, in this embodiment, the first film 110 further includes a protective film 113, and the protective film 113 is located on an upper surface of the first PET film 112 of the first film 110 and serves as a top surface of the first film 110. Preferably, the protective film layer is an AG film layer, the AG film represents an anti-glare protective film, the AG film adopts a three-layer structure, the surface layer is a frosted layer, the fingerprint invasion can be effectively resisted, the mark is not easy to leave when the finger touches, even if sweat and stain are left, the liquid crystal handwriting screen can be cleaned only by lightly wiping with hands, and the visual effect of the surface of the liquid crystal handwriting screen 10 is ensured to the maximum extent. And moreover, strong glare can be effectively eliminated, and the outdoor use of the liquid crystal handwriting board is improved to be moderate. Meanwhile, the liquid crystal handwriting screen can highly prevent scratches, is sensitive in touch control, can prevent penetration of ultraviolet rays and infrared rays, effectively improves the pressure resistance of the liquid crystal handwriting screen 10, and prolongs the service life of the liquid crystal handwriting screen.
Preferably, in this embodiment, the power circuit 100 includes a storage battery, the liquid crystal handwriting board is provided with a charging port and a charging management circuit, an input end of the charging management circuit is connected to the charging port, and an output end of the charging management circuit is connected to the storage battery of the power circuit 100, so as to charge the storage battery of the power circuit 100. The charging management circuit may adopt a battery charging management circuit disclosed in chinese patent CN207504591U in the prior art for charging the storage battery, which is not described herein.
Continuing to refer to fig. 1, the utility model also provides an erase equipment 20, with the above-mentioned liquid crystal handwriting pad that can locally erase supporting the use, erase equipment 20 through insulating power cord with the power supply circuit 100 of liquid crystal handwriting pad is connected, the inside of erasing equipment 20 is provided with boost circuit 210, boost circuit 210 with power supply circuit 100 connects to the signal of telecommunication that power supply circuit 100 provided exports the high-tension electricity signal to liquid crystal handwriting screen 10 after stepping up the processing. The output end of the power circuit 100 is connected to the input end of the voltage boost circuit 210 through an insulated power line to provide a working power supply for the voltage boost circuit, and the voltage boost circuit 210 increases the received electrical signal to a high voltage electrical signal and outputs the electrical signal to the first diaphragm 110 of the liquid crystal handwriting screen 10 through the output end of the voltage boost circuit 210. The boost circuit 210 may adopt a boost circuit of chinese patent CN101820218B in the prior art, and is used to boost and output an electrical signal, which is not described herein. The erasing device 20 may be a blackboard eraser.
Specifically, in this embodiment, a buffer layer 220 is disposed on one side of the erasing device 20, an outer surface of the buffer layer 220 is used for contacting with the liquid crystal handwriting screen 10 of the liquid crystal handwriting board, a metal conductive block 230 and a key switch 240 are disposed on an inner surface of the buffer layer, the key switch 240 is connected to the voltage boosting circuit 210 to control the operation of the voltage boosting circuit 210, and the metal conductive block 230 is connected to an output end of the voltage boosting circuit 210 to transmit an electrical signal to the liquid crystal handwriting screen 10. By arranging the buffer layer 220, damage to the liquid crystal handwriting screen 10 caused by direct contact between the metal conductive block 230 and the liquid crystal handwriting screen 10 can be avoided. Wherein, the buffer layer 220 can be soft buffer substance such as sponge or cotton cloth. The key switch 240 is closed by the contact of the erasing device 20 with the liquid crystal handwriting screen 10, so that the boosting circuit 210 can normally operate. The metal conductive block 230 is connected with the output end of the voltage boost circuit 210 to transmit the boosted high-voltage electric signal to the first conductive layer 111 of the first membrane 110 of the liquid crystal handwriting screen 10, because the first conductive layer 111 is divided into a plurality of square conductive areas which are insulated with each other, only the square conductive area corresponding to the contact position of the erasing device 20 and the liquid crystal handwriting screen 10 can obtain the high-voltage electric signal and transmit the high-voltage electric signal to the second conductive layer 121 corresponding to the square conductive area, and a loop is formed by the electrode 1211 of the second conductive layer 121 and the power supply circuit 100 to form an erasing electric field, so that liquid crystal molecules of the liquid crystal molecular layer in the corresponding area are deflected and restored to an ordered state, thereby eliminating writing on the handwriting board and realizing erasing the local area of the writing corresponding to the handwriting board which can be locally erased currently
Based on the design, when the hand-writing device works, the outer surface of the buffer layer of the erasing device is in contact with the liquid crystal hand-writing screen of the liquid crystal hand-writing board, pressure is generated between the buffer layer and the liquid crystal hand-writing screen, the key switch is triggered to be switched on and switched off, so that the power circuit of the liquid crystal hand-writing board provides working power for the booster circuit, the booster circuit boosts the electric signal provided by the power circuit to obtain a high-voltage electric signal, the high-voltage electric signal is transmitted to the first membrane of the liquid crystal hand-writing screen through the metal conductive block, only the conductive area of the erasing device in contact with the liquid crystal hand-writing screen can obtain the high-voltage electric signal and transmit the high-voltage electric signal to the conductive layer of the second membrane corresponding to the conductive layer, and a loop is formed through the electrode of the conductive layer of the second membrane and the power circuit to, so that the liquid crystal molecules of the liquid crystal molecular layer in the corresponding area deflect and return to the ordered state, thereby eliminating the writing on the handwriting board and realizing erasing the local area of the writing corresponding to the current erasing equipment.
To sum up, the utility model discloses but liquid crystal handwriting pad that local erasure is cut apart through the conducting layer with one in the two diaphragms of liquid crystal handwriting screen, forms the square conductive area of mutual insulation, through the control to the electrically conductive regional voltage of each side shape, forms and erases the electric field, can realize the local area's to writing the writing erasing, and all the other regions are not erased, have overcome that traditional technology can only realize the not enough of whole erasing, improved user's work efficiency and use experience, improve liquid crystal handwriting pad's commercial value. The utility model discloses erase equipment through the power supply circuit who sets up boost circuit cooperation liquid crystal handwriting pad in order to provide high pressure extremely the liquid crystal handwriting screen of liquid crystal handwriting pad to make the regional production that erases needs erase and erase the electric field, realize the local erasing.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not intended to limit the invention in any way. Various equivalent changes and modifications can be made on the basis of the above embodiments by those skilled in the art, and all equivalent changes and modifications within the scope of the claims should fall within the protection scope of the present invention.
Claims (7)
1. A liquid crystal handwriting board capable of being partially erased is characterized by comprising a liquid crystal handwriting screen and a power circuit;
the liquid crystal handwriting screen comprises a first membrane and a second membrane arranged opposite to the first membrane, conductive layers are formed on the opposite sides of the first membrane and the second membrane, and a liquid crystal molecular layer is arranged between the conductive layers of the first membrane and the second membrane;
the conducting layer of one of the first membrane or the second membrane is divided into a plurality of square conducting areas which are insulated with each other, and an electrode is led out of the conducting layer of the other membrane and is connected with the power circuit through the electrode so as to provide working power for the liquid crystal handwriting screen.
2. The liquid crystal handwriting pad capable of being erased locally according to claim 1, wherein the conducting layers of the first membrane and the second membrane are both ITO layers, the first membrane is arranged above the second membrane, the ITO layer of the first membrane is used as the bottom surface of the first membrane, and the ITO layer of the second membrane is used as the top surface of the second membrane.
3. The liquid crystal handwriting pad capable of being erased locally according to claim 2, wherein the first membrane and the second membrane both comprise a PET film layer, the PET film layer of the first membrane is arranged on the upper surface of the ITO layer, and the PET film layer of the second membrane is arranged on the lower surface of the ITO layer and serves as the bottom surface of the second membrane.
4. The liquid crystal writing pad of claim 3, wherein the first film further comprises a protective film layer disposed on the top surface of the PET film layer of the first film as the top surface of the first film.
5. The partially erasable liquid crystal writing pad of claim 1, wherein the power circuit comprises a battery, the liquid crystal writing pad is provided with a charging port and a charging management circuit, an input terminal of the charging management circuit is connected to the charging port, and an output terminal of the charging management circuit is connected to the power circuit to charge the battery of the power circuit.
6. An erasing device, which is used in combination with the liquid crystal writing pad capable of being partially erased according to any one of claims 1 to 5, wherein the erasing device is connected with a power circuit of the liquid crystal writing pad through an insulated power line, a voltage boosting circuit is arranged in the erasing device, and the voltage boosting circuit is connected with the power circuit so as to boost an electric signal and output a high-voltage electric signal.
7. The erasing device as claimed in claim 6, wherein a buffer layer is disposed on one side of the erasing device, an outer surface of the buffer layer is used for contacting with the liquid crystal writing pad, a metal conductive block and a key switch are disposed on an inner surface of the buffer layer, the key switch is connected with the boosting circuit to control the operation of the boosting circuit, and the metal conductive block is connected with an output end of the boosting circuit to transmit the boosted high-voltage electric signal to the liquid crystal writing screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920178285.6U CN209821567U (en) | 2019-01-30 | 2019-01-30 | Liquid crystal writing pad capable of being partially erased and erasing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920178285.6U CN209821567U (en) | 2019-01-30 | 2019-01-30 | Liquid crystal writing pad capable of being partially erased and erasing equipment |
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| CN209821567U true CN209821567U (en) | 2019-12-20 |
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| CN201920178285.6U Active CN209821567U (en) | 2019-01-30 | 2019-01-30 | Liquid crystal writing pad capable of being partially erased and erasing equipment |
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| CN (1) | CN209821567U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109597259A (en) * | 2019-01-30 | 2019-04-09 | 深圳市恒开源电子有限公司 | Can selective erase liquid crystal handwriting pad and erasing apparatus |
| CN114822436A (en) * | 2022-04-13 | 2022-07-29 | 山东蓝贝思特教装集团股份有限公司 | Liquid crystal writing device with photoelectric detection function and method |
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2019
- 2019-01-30 CN CN201920178285.6U patent/CN209821567U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109597259A (en) * | 2019-01-30 | 2019-04-09 | 深圳市恒开源电子有限公司 | Can selective erase liquid crystal handwriting pad and erasing apparatus |
| CN114822436A (en) * | 2022-04-13 | 2022-07-29 | 山东蓝贝思特教装集团股份有限公司 | Liquid crystal writing device with photoelectric detection function and method |
| CN114822436B (en) * | 2022-04-13 | 2023-12-08 | 山东蓝贝思特教装集团股份有限公司 | Liquid crystal writing device with photoelectric detection function and method |
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Address after: 518000 Room 401, building a, Zhihai Industrial Park, B16, first industrial zone, Baihua community, Guangming office, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Shenzhen do true scientific research Co.,Ltd. Address before: 518000 Room 401, building a, Zhihai Industrial Park, B16, first industrial zone, Baihua community, Guangming office, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN HENGKAIYUAN ELECTRONICS Co.,Ltd. |