HK1223159A1 - Liquid crystal display mold with handwriting function and maufacturing method - Google Patents
Liquid crystal display mold with handwriting function and maufacturing method Download PDFInfo
- Publication number
- HK1223159A1 HK1223159A1 HK16111266.6A HK16111266A HK1223159A1 HK 1223159 A1 HK1223159 A1 HK 1223159A1 HK 16111266 A HK16111266 A HK 16111266A HK 1223159 A1 HK1223159 A1 HK 1223159A1
- Authority
- HK
- Hong Kong
- Prior art keywords
- liquid crystal
- tft
- crystal display
- lcd panel
- handwriting
- Prior art date
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13452—Conductors connecting driver circuitry and terminals of panels
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03547—Touch pads, in which fingers can move on a surface
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a liquid crystal display module having a handwriting function and a manufacture method of the liquid crystal display module. The liquid crystal display module comprises a cover board and a TFT-LCD (Thin Film Transistor-Liquid Crystal Display) panel fixedly attached with the cover board, wherein a first metal circuit board is plated on the lower surface of the cover board, an upper polarizer is fixedly attached on the upper surface of the TFT-LCD panel, a lower polarizer is fixedly attached on the lower surface of the TFT-LCD panel, a second metal circuit board is plated on the upper surface of the upper polarizer, a cholesteric liquid crystal polymer coats the upper surface of the second metal circuit board, a connecting block is arranged at one end of the TFT-LCD panel in a protruded manner, and a liquid crystal display flexible printed circuit (FPC) and a drive IC (integrated circuit) are encapsulated on the connecting block. The liquid crystal display module can be used as a display screen or a handwriting board, has a simple structure, and can be processed simply, the functions of the product can be increased and the competitiveness is improved.
Description
Technical Field
The invention relates to the technical field of liquid crystal displays, in particular to a liquid crystal display module with a handwriting function and a manufacturing method thereof.
Background
At present, cholesteric liquid crystal polymers are poured between two pieces of PET (polyethylene terephthalate), and when pressure is applied to the surface of the PET, tracks can be recorded in the conventional liquid crystal handwriting board. Under the drive of a certain voltage waveform, the cholesteric liquid crystal is restored to the initial state. Such a writing pad has a single function, which limits its market competitiveness.
The existing liquid crystal display module is to package an IC on a TFT-LCD, attach a polarizer, and drive with a voltage to realize display, but as the TFT technology is mature and the market is saturated, the profit and competitiveness of the liquid crystal display module are also reduced.
If the two products can be combined into one, the competitiveness of the product can be greatly improved.
Disclosure of Invention
Aiming at the defects in the technology, the invention provides the liquid crystal display module with the handwriting function and the manufacturing method thereof, wherein the liquid crystal display module is simple in processing technology and low in manufacturing cost.
In order to achieve the purpose, the liquid crystal display module with the handwriting function comprises a cover plate and a TFT-LCD panel fixedly attached to the cover plate, wherein a first metal circuit board is plated on the lower surface of the cover plate, an upper polaroid is fixedly attached to the upper surface of the TFT-LCD panel, a lower polaroid is fixedly attached to the lower surface of the TFT-LCD panel, a second metal circuit board is plated on the upper surface of the upper polaroid, a cholesteric liquid crystal polymer is coated on the upper surface of the second metal circuit board, one end of the TFT-LCD panel is outwards convexly provided with a connecting block, and a liquid crystal display FPC and a driving IC are packaged on the connecting block;
and (4) display function: the liquid crystal display transmits signals to the TFT-LCD panel, and the TFT-LCD panel displays the signals so as to be displayed on the cover plate;
handwriting function: the handwriting pen is used for handwriting on the cover plate, the surface of the cover plate is pressed, liquid crystal molecules are axially changed under the action of external force, light and shade contrast is formed through optical permeation, and the cholesteric liquid crystal polymer can record marks of strokes of handwriting, so that the marks are displayed on the cover plate, and the handwriting function is realized.
The first metal circuit board and the cholesteric liquid crystal polymer are bonded through OCA glue, and the cover plate and the TFT-LCD panel are also bonded through OCA glue.
One end of the first metal circuit board extends outwards to form a first electrode, one end of the second metal circuit board extends outwards to form a second electrode, and the first electrode and the second electrode are electrically connected with the screen cleaning driving board.
The screen cleaning drive board is provided with a handwriting board FPC, a screen cleaning button and a lithium battery, the screen cleaning button is electrically connected with the lithium battery, and the screen cleaning button is electrically connected with the handwriting board FPC.
The lower surface of the lower polarizer is provided with a backlight source, the backlight source is inwards sunken to form an accommodating groove, and the TFT-LCD panel is positioned in the accommodating groove.
In order to achieve the above object, the present invention further provides a method for manufacturing a liquid crystal display module with a handwriting function, comprising the following steps:
s1, the ITO circuit is evenly coated on the surface of the upper polaroid to form a second metal circuit board, and the second metal circuit board is dried and flat. Coating an ITO circuit on a cover plate to form a first metal circuit board according to the same method;
s2, attaching the upper polarizer on the upper surface of the TFT-LCD panel, blending cholesteric liquid crystal polymer, and mixing the cholesteric liquid crystal and the oriented adhesive polymer in a ratio of 7: 3, and the cholesteric liquid crystal is aligned. Coating the oriented polymer on the surface of the upper polarizer;
s3, compounding a cover plate with a first metal circuit board on the S2;
s4, attaching the lower polarizer to the lower surface of the TFT-LCD panel, then placing the lower polarizer into a defoaming machine for defoaming, and removing bubbles generated by attachment;
s5, packaging the liquid crystal display FPC on the TFT-LCD panel after packaging the drive IC on the TFT-LCD panel to realize the display function;
s6, respectively drawing a lead wire between the first electrode and the second electrode, and connecting the lead wires and the screen cleaning driving board into a whole;
s7, leading out the screen clearing button on the screen clearing driving board to obtain two GPIO interfaces, controlling the GPIO interfaces through the television mainboard to drive screen clearing, and simultaneously outputting signals to the liquid crystal module to be displayed;
s8, assembling the backlight source and the TFT-LCD panel to complete the liquid crystal display module with handwriting function, which not only has the function of a liquid crystal display module, but also can be used as a handwriting board for education or a conference display board.
Wherein, the ITO circuit coating thickness in the step S1 is 0.25-0.35um, and the resistance value is 500 +/-150 ohms.
Wherein the coating thickness of the oriented polymer in the step S2 is 0.25-0.35 mm.
In step S6, 6S is pressed under a pressure of 22 ± 1kgf with a pressing head of 160 ± 5 ℃ to package the driver IC on the TFT-LCD panel, and 10S is pressed under a pressure of 6 ± 1kgf with a pressing head of 155 ± 5 ℃ to package the liquid crystal display FPC on the TFT-LCD panel.
The invention has the beneficial effects that: compared with the prior art, the liquid crystal display module with the handwriting function and the manufacturing method thereof can be used as a common liquid crystal display module, when the handwriting board is not used, the cholesteric liquid crystal polymer and the cover plate have little influence on the display effect of the liquid crystal display module, when the liquid crystal display module is not in a closed state, the liquid crystal display module is black, and when a handwriting pen is used for applying pressure to the surface of a product, the pressure track can be displayed, so that the function of the handwriting board is realized, the content of the handwriting board is recorded, and if needed, the handwriting content is displayed on the liquid crystal module by technologies such as Wifi or Bluetooth and the like.
Drawings
FIG. 1 is a structural diagram of a liquid crystal display module with a handwriting function according to the present invention;
fig. 2 is a top view of fig. 1.
The main element symbols are as follows:
1. cover plate 2 and TFT-LCD panel
3. First metal wiring board 4, go up polaroid
5. Lower polarizer 6 and second metal circuit board
7. Cholesteric liquid crystal polymer 8 and connecting block
9. Liquid crystal display FPC10 and drive IC
11. A first electrode 12 and a second electrode
13. Screen cleaning drive board 14 and handwriting board FPC
15. Screen clearing button 16 and backlight source
17. Holding tank 18, OCA glue
19. Lithium battery
Detailed Description
In order to more clearly describe the present invention, the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1-2, the liquid crystal display module with handwriting function provided by the invention comprises a cover plate 1 and a TFT-LCD panel 2 fixedly attached to the cover plate 1, wherein a first metal circuit board 3 is plated on the lower surface of the cover plate 1, an upper polarizer 4 is fixedly attached to the upper surface of the TFT-LCD panel 2, a lower polarizer 5 is fixedly attached to the lower surface of the TFT-LCD panel 2, a second metal circuit board 6 is plated on the upper surface of the upper polarizer 4, a cholesteric liquid crystal polymer 7 is coated on the upper surface of the second metal circuit board 6, one end of the TFT-LCD panel 2 is provided with a connecting block 8 in an outward protruding manner, and a liquid crystal display FPC9 and a drive IC10 are packaged on the connecting block 8;
and (4) display function: the liquid crystal display transmits signals to the TFT-LCD panel 2, and the TFT-LCD panel 2 displays the signals so as to display the signals on the cover plate 1;
handwriting function: the handwriting pen is used for handwriting on the cover plate 1, the surface of the cover plate 1 is pressed, liquid crystal molecules are axially changed under the action of external force, light and shade contrast is formed through optical permeation, and the cholesteric liquid crystal polymer 7 can record marks which are formed by handwriting strokes, so that the marks are displayed on the cover plate 1, and the handwriting function is realized.
Compared with the prior art, the liquid crystal display module with the handwriting function can be used as a common liquid crystal display module, when the handwriting board is not used, the cholesteric liquid crystal polymer 7 and the cover plate 1 have little influence on the display effect of the liquid crystal display module, when the liquid crystal display module is not in a closed state, the liquid crystal display module is black, and when a handwriting pen is used for applying pressure to the surface of a product, the pressure track can be displayed, so that the function of the handwriting board is realized, and if needed, handwriting contents are displayed on the liquid crystal module by technologies such as Wifi or Bluetooth.
In this embodiment, the first metal wiring board 3 and the cholesteric liquid crystal polymer 4 are bonded by OCA glue 18, and the cover plate 1 and the TFT-LCD panel 2 are also bonded by OCA glue 18. The OCA paste 18 is filled into the gap between the cover plate 1 and the TFT-LCD panel 2.
In this embodiment, one end of the first metal circuit board 3 extends outward to form a first electrode 11, one end of the second metal circuit board 6 extends outward to form a second electrode 12, and the first electrode 11 and the second electrode 12 are electrically connected to the screen cleaning driving board 13. The screen clearing driving board 13 is used for clearing screens during handwriting.
In the embodiment, the screen cleaning drive board 13 is provided with a handwriting board FPC14, a screen cleaning button 15 and a lithium battery 19, the screen cleaning button 15 is electrically connected with the lithium battery, and the screen cleaning button 15 is electrically connected with the handwriting board FPC 14. When the screen clearing button 15 is pressed and conducted, the cholesteric liquid crystal polymer 7 is restored to the initial state under the action of the electric field, and the track of the handwriting pen is cleared.
In this embodiment, the lower surface of the lower polarizer 5 is provided with a backlight 14, the backlight 16 is recessed inward to form a receiving groove 17, and the TFT-LCD panel 2 is located in the receiving groove 17.
The invention also provides a manufacturing method of the liquid crystal display module with the handwriting function, which comprises the following steps:
s1, the ITO circuit is evenly coated on the surface of the upper polaroid 4 to form a second metal circuit board 6, and the second metal circuit board is dried and flat. According to the same method, coating an ITO circuit on a cover plate 1 to form a first metal circuit board 3;
s2, attaching the upper polarizer 4 to the upper surface of the TFT-LCD panel 2, blending the cholesteric liquid crystal polymer 7, and mixing the cholesteric liquid crystal and the oriented adhesive polymer in a ratio of 7: 3, and the cholesteric liquid crystal is aligned. Coating the oriented polymer on the surface of the upper polarizer;
s3, compounding the cover plate 1 with the first metal circuit board 3 on the S2;
s4, attaching the lower polarizer 5 to the lower surface of the TFT-LCD panel 2, then placing the lower polarizer in a defoaming machine for defoaming, and removing bubbles generated by attachment;
s5, after the driving IC10 is packaged on the TFT-LCD panel 2, the liquid crystal display FPC9 is packaged on the TFT-LCD panel 2, and the display function is achieved;
s6, respectively drawing a lead between the first electrode 11 and the second electrode 12, and connecting the lead and the screen cleaning driving board 13 into a whole;
s7, leading out the screen clearing button 15 on the screen clearing driving board 13 to obtain two GPIO interfaces, controlling the GPIO interfaces through the television mainboard to drive screen clearing, and simultaneously outputting signals to the liquid crystal module to be displayed;
s8, the backlight source 16 and the TFT-LCD panel 2 are assembled to complete the liquid crystal display module with the handwriting function, which not only has the function of a liquid crystal display module, but also can be used as a handwriting board for education or a conference display board.
In this embodiment, the thickness of the ITO wiring coating in step S1 is 0.25-0.35um, and the resistance is 500 + -150 ohms.
In this embodiment, the thickness of the polymer coating oriented in step S2 is 0.25-0.35 mm.
In this embodiment, 6S is pressed with a pressure head of 160 + -5 deg.C under a pressure of 22 + -1 kgf in step S6, the driver IC10 is packaged on the TFT-LCD panel 2, and 10S is pressed with a pressure head of 155 + -5 deg.C under a pressure of 6 + -1 kgf, and the liquid crystal display FPC9 is packaged on the TFT-LCD panel 2.
A TFT: namely, a thin film field effect transistor, which is one of active matrix liquid crystal displays.
FPC: the flexible printed circuit board is a flexible printed circuit board with high reliability and excellent performance, which is made of polyimide or polyester film as base material.
OCA glue: a special adhesive for gluing transparent optical elements.
The present invention is not limited thereto and any variations that may be considered by those skilled in the art are intended to fall within the scope of the present invention.
Claims (9)
1. A liquid crystal display module with a handwriting function is characterized by comprising a cover plate and a TFT-LCD panel fixedly attached to the cover plate, wherein a first metal circuit board is plated on the lower surface of the cover plate, an upper polarizer is fixedly attached to the upper surface of the TFT-LCD panel, a lower polarizer is fixedly attached to the lower surface of the TFT-LCD panel, a second metal circuit board is plated on the upper surface of the upper polarizer, a cholesteric liquid crystal polymer is coated on the upper surface of the second metal circuit board, one end of the TFT-LCD panel is provided with a connecting block in an outward protruding mode, and a liquid crystal display FPC and a drive IC are packaged on the connecting block;
and (4) display function: the liquid crystal display transmits signals to the TFT-LCD panel, and the TFT-LCD panel displays the signals so as to be displayed on the cover plate;
handwriting function: the handwriting pen is used for handwriting on the cover plate, the surface of the cover plate is pressed, liquid crystal molecules are axially changed under the action of external force, light and shade contrast is formed through optical permeation, and the cholesteric liquid crystal polymer can record marks of strokes of handwriting, so that the marks are displayed on the cover plate, and the handwriting function is realized.
2. The liquid crystal display module with the handwriting function according to claim 1, wherein the first metal circuit board and the cholesteric liquid crystal polymer are bonded through OCA glue, and the cover plate and the TFT-LCD panel are also bonded through OCA glue.
3. The liquid crystal display module with a handwriting function according to claim 1, wherein a first electrode extends outwards from one end of the first metal circuit board, a second electrode extends outwards from one end of the second metal circuit board, and the first electrode and the second electrode are electrically connected with the screen cleaning driving board.
4. The liquid crystal display module with the handwriting function according to claim 3, wherein a handwriting board FPC, a screen cleaning button and a lithium battery are arranged on the screen cleaning driving board, the screen cleaning button is electrically connected with the lithium battery, and the screen cleaning button is electrically connected with the handwriting board FPC.
5. The liquid crystal display module with handwriting function of claim 1, wherein a backlight source is arranged on the lower surface of said lower polarizer, said backlight source is recessed inwards to form a receiving groove, and said TFT-LCD panel is located in said receiving groove.
6. A manufacturing method of a liquid crystal display module with a handwriting function is characterized by comprising the following steps:
s1, the ITO circuit is evenly coated on the surface of the upper polaroid to form a second metal circuit board, and the second metal circuit board is dried and flat. Coating an ITO circuit on a cover plate to form a first metal circuit board according to the same method;
s2, attaching the upper polarizer on the upper surface of the TFT-LCD panel, blending cholesteric liquid crystal polymer, and mixing the cholesteric liquid crystal and the oriented adhesive polymer in a ratio of 7: 3, and the cholesteric liquid crystal is aligned. Coating the oriented polymer on the surface of the upper polarizer;
s3, compounding a cover plate with a first metal circuit board on the S2;
s4, attaching the lower polarizer to the lower surface of the TFT-LCD panel, then placing the lower polarizer into a defoaming machine for defoaming, and removing bubbles generated by attachment;
s5, packaging the liquid crystal display FPC on the TFT-LCD panel after packaging the drive IC on the TFT-LCD panel to realize the display function;
s6, respectively drawing a lead wire between the first electrode and the second electrode, and connecting the lead wires and the screen cleaning driving board into a whole;
s7, leading out the screen clearing button on the screen clearing driving board to obtain two GPIO interfaces, controlling the GPIO interfaces through the television mainboard to drive screen clearing, and simultaneously outputting signals to the liquid crystal module to be displayed;
s8, assembling the backlight source and the TFT-LCD panel to complete the liquid crystal display module with handwriting function, which not only has the function of a liquid crystal display module, but also can be used as a handwriting board for education or a conference display board.
7. The method of claim 6, wherein the thickness of the ITO trace applied in step S1 is 0.25-0.35um, and the resistance is 500 ± 150 ohms.
8. The method as claimed in claim 6, wherein the thickness of the polymer layer applied in step S2 is 0.25-0.35 mm.
9. The method as claimed in claim 6, wherein in step S6, the driver IC is encapsulated on the TFT-LCD panel by pressing 6S at 22 ± 1kgf with a pressing head of 160 ± 5 ℃, and the liquid crystal display FPC is encapsulated on the TFT-LCD panel by pressing 10S at 6 ± 1kgf with a pressing head of 155 ± 5 ℃.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610191991.5A CN105717684A (en) | 2016-03-30 | 2016-03-30 | Liquid crystal display module having handwriting function and manufacture method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| HK1223159A1 true HK1223159A1 (en) | 2017-07-21 |
Family
ID=56158434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| HK16111266.6A HK1223159A1 (en) | 2016-03-30 | 2016-09-26 | Liquid crystal display mold with handwriting function and maufacturing method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105717684A (en) |
| HK (1) | HK1223159A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106647087A (en) * | 2017-01-24 | 2017-05-10 | 北海星沅电子科技有限公司 | Method for manufacturing writing pad having liquid crystal display function |
| CN107092110A (en) * | 2017-06-06 | 2017-08-25 | 深圳市厚璞科技有限公司 | A kind of display device and its display methods for being integrated with bistable liquid crystal film |
| CN109116600A (en) * | 2017-06-22 | 2019-01-01 | 深圳市朗得力科技有限公司 | A kind of liquid crystal display with handwriting functions |
| US12379630B2 (en) | 2022-01-29 | 2025-08-05 | Boe Technology Group Co., Ltd. | Liquid crystal handwriting board and manufacturing method therefor |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5351143A (en) * | 1992-02-07 | 1994-09-27 | Kabushiki Kaisha Pilot | Hand-writable polymer dispersed liquid crystal board set with high resistance layer of crosslinking polymer adjacent conductive layer |
| JP3209149B2 (en) * | 1997-08-06 | 2001-09-17 | 日本電気株式会社 | Mobile terminal device |
| CN1187690C (en) * | 2001-07-19 | 2005-02-02 | 宏碁股份有限公司 | Notebook computer with handwriting input device |
| CN2609013Y (en) * | 2003-03-14 | 2004-03-31 | 力盛光电股份有限公司 | Inductive LCD |
| FR2885425B1 (en) * | 2005-05-09 | 2008-07-04 | Eastman Kodak Co | REUSABLE ELECTRONIC WRITING AND DISPLAY DEVICE |
| CN201072476Y (en) * | 2007-06-21 | 2008-06-11 | 中兴通讯股份有限公司 | A liquid crystal display module with handwriting function |
| TW201333758A (en) * | 2011-11-01 | 2013-08-16 | Kent Displays Inc | Writing tablet information recording device |
| CN103246096B (en) * | 2012-02-13 | 2016-05-18 | 江苏和成显示科技股份有限公司 | Bistable liquid crystal handwriting device |
| US9116379B2 (en) * | 2012-05-22 | 2015-08-25 | Kent Displays Incorporated | Electronic display with semitransparent back layer |
| CN104118249A (en) * | 2013-04-23 | 2014-10-29 | 鸿富锦精密工业（深圳）有限公司 | Electronic writing board |
| CN104062797B (en) * | 2014-07-14 | 2017-06-16 | 深圳市唯酷光电有限公司 | Liquid crystal handwriting device |
-
2016
- 2016-03-30 CN CN201610191991.5A patent/CN105717684A/en active Pending
- 2016-09-26 HK HK16111266.6A patent/HK1223159A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CN105717684A (en) | 2016-06-29 |
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