CN109637466A - Display device of electronic paper - Google Patents
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- CN109637466A CN109637466A CN201910092899.7A CN201910092899A CN109637466A CN 109637466 A CN109637466 A CN 109637466A CN 201910092899 A CN201910092899 A CN 201910092899A CN 109637466 A CN109637466 A CN 109637466A
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- electronic paper
- data
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- display panel
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention relates to a kind of display device of electronic paper, including data processing system, electronic paper display panel and interface conversion system, interface conversion system is electrical connected with data processing system, electronic paper display panel respectively, the image data that data processing system interface exports can be converted to the interface data of electronic paper display panel, so that electronic paper display panel be driven to show.
Description
Technical field
The present invention relates to field of electronic display, more particularly to a kind of display device of electronic paper.
Background technique
Electronic ink screen is also known as electronic paper display panel, because the characteristic of its power saving is widely used in that e-book etc. is portable to be set
In standby.The displaying principle of electronic ink screen is to be arranged to drive at two by applying different electric fields between two electrodes
With multiple microcapsules of positively charged white particles and electronegative black particles between electrode, change charged particle micro-
Upper and lower position in capsule is to achieve the effect that the different grayscale of display.But reception system is also not implemented in traditional electronic ink screen
The image data that grade chip (System on Chip, SOC) exports is shown.
Summary of the invention
The application technical problems to be solved be to provide it is a kind of be able to achieve electronic ink screen receive system level chip output
The display device of electronic paper that image data is shown.
A kind of display device of electronic paper, including data processing system and electronic paper display panel, further includes:
Interface conversion system is electrical connected with the data processing system, the electronic paper display panel respectively, and being used for will
The image data of the data processing system interface output is converted to the interface data of the electronic paper display panel, and drives institute
Electronic paper display panel is stated to show.
Above-mentioned display device of electronic paper, interface conversion system are electric with data processing system, electronic paper display panel respectively
Property be connected, the image data that data processing system interface exports can be converted to the interface data of electronic paper display panel, from
And electronic paper display panel is driven to show.
The data processing system is equipped with MIPI interface in one of the embodiments, and the electronic paper display panel is set
There is DPI interface, the interface conversion system is for being converted to the image data that the data processing system MIPI interface exports
The DPI interface data of the electronic paper display panel.
The display device of electronic paper further includes temperature sensor in one of the embodiments, the temperature sensor
It is electrical connected with the interface conversion system,
The temperature sensor is used to acquire the temperature data on the electronic paper display panel；
The interface conversion system is used in conjunction with the temperature data, the picture that the data processing system interface is exported
Data are converted to the interface data of the electronic paper display panel.
The display device of electronic paper further includes mode setting device in one of the embodiments, the mode setting device
It is electrical connected with the interface conversion system,
The mode setting device is used for the interface conversion system transmission pattern sets signal；
The interface conversion system is used in conjunction with the temperature data and the mode setting signal, by the data processing
The image data of system interface output is converted to the interface data of the electronic paper display panel.
The mode setting signal includes in gray scale refresh signal and black and white refresh signal in one of the embodiments,
It is a kind of.
The display device of electronic paper in one of the embodiments, further include:
Identifier is electrical connected with the data processing system, the mode setting device respectively, for setting to the mode
Determine the data type that device sends the image data；
The mode setting device is electrical connected with the interface conversion system, the picture for being exported according to the identifier
The data type of data exports the mode setting signal.
The display device of electronic paper in one of the embodiments, further include:
Memory is electrical connected with the interface conversion system, is preset with drive waveforms in the memory；
The interface conversion system is used for according to the drive waveforms, in conjunction with the temperature data and mode setting letter
Number, the image data that the data processing system interface exports is converted to the interface data of the electronic paper display panel.
The display device of electronic paper further includes power-supply management system in one of the embodiments, the power management
System is electrical connected with the data processing system, the electronic paper display panel respectively, and the power-supply management system is used for root
Control voltage is exported according to the data processing system, the control voltage is used to provide display electricity to the electronic paper display panel
Pressure.
The display voltage is ± 15V pulse voltage in one of the embodiments,.
The power-supply management system passes through Jie's bus and the data processing system electrical property phase in one of the embodiments,
Even.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of display device of electronic paper in an embodiment；
Fig. 2 is the structural schematic diagram of display device of electronic paper in another embodiment；
Fig. 3 is the structural schematic diagram of display device of electronic paper in another embodiment；
Fig. 4 is the structural schematic diagram of display device of electronic paper in another embodiment.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give preferred embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to the disclosure.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
It is the structural schematic diagram of display device of electronic paper in an embodiment referring to Fig. 1, Fig. 1.
A kind of display device of electronic paper 100, including data processing system 110 and electronic paper display panel 130, further includes:
Interface conversion system 120 is electrical connected with data processing system 110, electronic paper display panel 130 respectively, is used for
The image data that 110 interface of data processing system exports is converted into the interface data of electronic paper display panel 130, and drives electricity
Sub- paper display panel 130 is shown.
Wherein, electronic paper display panel 130 includes top layer transparent electrode, electrophoresis layer and the bottom film for stacking gradually connection
Electrode, top layer transparent electrode and bottom film electrode are used to apply voltage to the both ends of electrophoresis layer, and electrophoresis layer includes that several are micro-
Capsule, with electrophoresis liquid and the electrophoresis particle being suspended in electrophoresis liquid in microcapsules, electrophoresis particle top layer transparent electrode with
Under voltage effect between bottom film electrode, make in electrophoresis liquid towards or away from top layer transparent electrode and bottom film electrode
Movement.Specifically, each microcapsules include many positively charged black particles and electronegative white particles, when in microcapsules
When both ends apply positive voltage, positively charged black particles are moved to close to the side of top layer transparent electrode, make electronic paper display face
Plate shows required picture, and electronegative white particles are then moved to close to the side of bottom film electrode；When at microcapsules both ends
When applying negative voltage, electronegative white particles are moved to the side of top layer transparent electrode, and positively charged black particles then move
To the side close to bottom film electrode.
Specifically, data processing system 110 can use system level chip, which is mainly used for RGB to be shown
Image data exports after being handled, and can specifically include color treatments and noise reduction process etc..
In the present embodiment, interface conversion system 120 is converted to the image data that 110 interface of data processing system exports
The interface data of electronic paper display panel 130, specifically, interface conversion system 120 is by the interface conversion of data processing system 110
For the interface to match with electronic paper display panel 130, to be carried out data transmission by the interface.
Above-mentioned display device of electronic paper 100, interface conversion system 120 are aobvious with data processing system 110, Electronic Paper respectively
Show that panel 130 is electrical connected, the image data that 110 interface of data processing system exports can be converted to electronic paper display panel
130 interface data, so that electronic paper display panel 130 be driven to show.
In one embodiment, data processing system 110 is equipped with MIPI interface, and electronic paper display panel 130 connects equipped with DPI
Mouthful, interface conversion system 120 is used to the image data that the MIPI interface of data processing system 110 exports being converted to Electronic Paper and show
Show the DPI interface data of panel 130.
In the present embodiment, since traditional data processing system 110 is typically provided with MIPI interface, traditional Electronic Paper is aobvious
Show that panel 130 is typically provided with DPI interface, the MIPI interface of data processing system 110 is passed through into interface conversion system 120 and electronics
The DPI interface of paper display panel 130 is electrical connected, the image data that can export the MIPI interface of data processing system 110
The DPI interface data of electronic paper display panel 130 is converted to, so that electronic paper display panel 130 be driven to show.
Referring to fig. 2, Fig. 2 is the structural schematic diagram of display device of electronic paper in another embodiment, display device of electronic paper 100
It further include temperature sensor 140 and/or mode setting device 150, temperature sensor 140, mode setting device 150 turn with interface respectively
System 120 is changed to be electrical connected, wherein
Temperature sensor 140 is used to acquire the temperature data on electronic paper display panel 130；
Mode setting device 150 is used for 120 transmission pattern sets signal of interface conversion system；
Interface conversion system 120 is used for combination temperature data and/or mode setting signal, and data processing system 110 is connect
The image data of mouth output is converted to the interface data of electronic paper display panel 130.
In the present embodiment, since the black and white particle of electrophoresis layer in electronic paper display panel 130 is more sensitive to temperature, temperature
When spending lower, particle activity is poorer, and it is longer to be moved to the time that same location needs in microcapsules compared to room temperature；Temperature is higher
When, Particles Moving is faster, and it is relatively shorter to be moved to the time that same location needs in microcapsules compared to room temperature.For Electronic Paper
This characteristic of display panel 130, is additionally arranged temperature sensor 140, wherein temperature sensing in display device of electronic paper 100
Device 140 can select diode as temperature sensor, and thermistor can also be selected as temperature sensor, can also be selected
Other materials is as temperature sensor, and this is not restricted.Wherein, when selecting diode as temperature sensor, the change of temperature
Change will affect the electric current passed through in diode, and circuit board can calculate temperature value by detecting the electric current that diode flows through.
Wherein, display device of electronic paper 100 can also include mode setting device 150, and mode setting device 150 is used for interface
120 transmission pattern sets signal of converting system, wherein mode setting signal may include refresh signal.Although electronic paper display
Panel 130 will accurately show certain gray scale color because its working characteristics has many advantages, such as low-power consumption, need band in microcapsules
The black particles of positive electricity and electronegative white particles are moved to appropriate position, and control top layer transparent electrode and bottom thin
Direction of an electric field and duration between membrane electrode, thus need by repeatedly refreshing to drive black and white particle to be just able to achieve, root
According to the data type of the image data of 110 interface of data processing system output, mode setting device 150 can export different refreshings
Signal, to improve the efficiency of display.
In one embodiment, display device of electronic paper 100 can also include memory 160, and memory 160 and interface turn
It changes system 120 to be electrical connected, memory 160 is mainly made of look-up table, and corresponding electronic paper display face is preset in look-up table
130 drive waveforms of plate, interface conversion system 120 are set according to drive waveforms in storage table 160, combination temperature data and/or mode
Determine the interface data that the image data that 110 interface of data processing system exports is converted to electronic paper display panel 130 by signal, it should
Drive waveforms are 130 drive waveforms of electronic paper display panel under different mode setting signal and different temperatures data.Wherein, should
Memory 160 can select flash memories, can for good and all keep storing in the case where not powered using flash memories
Information.
In one embodiment, the mode setting signal that mode setting device 150 is sent to interface conversion system 120 can wrap
Include one of gray scale refresh signal and black and white refresh signal.
In the present embodiment, mode setting signal is used to set the display pattern of electronic paper display panel 130, mode setting
Signal includes one of gray scale refresh signal and black and white refresh signal, wherein when mode setting signal is gray scale refresh signal
When, electronic paper display panel 130 it is full frame refreshing once at least need 780ms (numerical value be to 6 inches of electric ink screens and
Speech, 5 inches of electronic ink screen foams full frame refresh time under gray scale refresh signal is shorter, and 9 inches of electric ink screens exist
Full frame refresh time is longer under gray scale refresh signal), gray scale refresh signal further include 2 grades (A2 refreshings), 4 grades (GC4 refreshings) or
16 grades of (GC16 refreshing) gray scale refresh signals, the gray scale that different series can be provided for electronic paper display panel 130 are shown；
When mode setting signal is black and white refresh signal, the full frame refreshing of electronic paper display panel 130 once at least needs 200ms (should
Numerical value is for 6 inches of electric ink screens, and 5 inches of electronic ink screen foams are under black and white refresh signal when full frame refreshing
Between it is shorter, 9 inches of electric ink screens full frame refresh time under black and white refresh signal is longer), the black and white refresh signal is only
Black-and-white two color can be provided for electronic paper display panel 130 to be shown.
Referring to Fig. 3, Fig. 3 is the structural schematic diagram of display device of electronic paper in another embodiment, display device of electronic paper 100
Further include:
Identifier 170 is electrical connected with data processing system 110, mode setting device 150 respectively, for setting to mode
The data type of the transmission image data of device 150；
Mode setting device 150 is electrical connected with interface conversion system 120, the picture number for being exported according to identifier 170
According to data type output mode setting signal.
In this embodiment, identifier 170 is used to send the data type of image data, picture number to mode setting device 150
According to data type include lteral data type, graphics data type and/or picture data type, mode setting device 150 is used for
According to the data type output mode setting signal for the image data that identifier 170 exports, the mode setting signal is for setting
The display pattern of electronic paper display panel 130.It specifically, only include lteral data type for the data type of image data
And/or when graphics data type, mode setting device 150 exports black and white refresh signal；Data type for image data includes
When picture data type, 150 output gray level refresh signal of mode setting device.Identifier 170 can be used with fixed function
Hardware circuit or chip are realized, such as have configured the FPGA circuitry etc. of function, can be to the specific data of input, such as text
Sheet, graph data etc. carry out logical operation and one of obtain and export several certain types of signals, to indicate the data class inputted
Type.
Referring to fig. 4, Fig. 4 is the structural schematic diagram of display device of electronic paper in another embodiment, display device of electronic paper 100
Further include power-supply management system 180, power-supply management system 180 respectively with data processing system 110, electronic paper display panel 130
It is electrical connected, power-supply management system 180 is used to export control voltage according to data processing system 110, and control voltage is used for electricity
Sub- paper display panel 130 provides display voltage.
In the present embodiment, display device of electronic paper 100 includes power-supply management system 180, and power-supply management system 180 is used for
Electron paper display panel 130 provides display voltage, since electronic paper display panel 130 only needs to provide electric energy when refreshing,
Therefore power-supply management system 180 can provide display voltage when refreshing in electronic paper display panel 130.
Specifically, voltage required for electronic paper display panel 130 works normally is ± 15V, then power-supply management system 180
The display voltage of offer is ± 15V pulse voltage.
In one embodiment, power-supply management system 180 passes through Jie's bus (I2C bus) and 110 electricity of data processing system
Property be connected, but both modes of connection are also not necessarily limited to, as long as power-supply management system 180 and data processing system 110 can be made electrically
Connection.
Specifically, interface conversion system 120 includes Toshiba's conversion chip.
In the present embodiment, when interface conversion system 120 includes Toshiba's conversion chip, then display device of electronic paper 100
Whole hardware connection structure are as follows: data processing system 110 is equipped with MIPI interface, and electronic paper display panel 130 connects equipped with DPI
Mouthful, the MIPI interface of data processing system 110 is electrical by the DPI interface of Toshiba's conversion chip and electronic paper display panel 130
Connection.Its working principle is that: the image data that interface conversion system 120 exports the MIPI interface of data processing system 110 turns
It is changed to the DPI interface data of electronic paper display panel 130, and electronic paper display panel 130 is driven to show.
Specifically, software implementation method includes the debugging of driving layer and the Toshiba's conversion chip of data processing system 110
Data processing, wherein the driving layer debugging process of data processing system 110 includes step S10, S11 and S12, wherein step
S10: according to the initiation parameter of Toshiba's conversion chip, the chip is driven；Step S11: adjustment MIPI clock and Toshiba convert core
Piece clock is consistent；Step S13: according to the time sequence parameter of the parameter request configuration DPI interface of electronic paper display panel 130, configuration
Parameter includes configuring temperature data, the display pattern parameter etc. of electronic paper display panel 130.
The process of the data processing of Toshiba's conversion chip includes step S20, S21, S22 and S23, wherein step S20: is set
Flinger layers of surface are set, surface flinger frame and surface are constructed in flinger layers of surface
Flinger process, wherein surface flinger frame is for transmitting data, including Data entries and data outlet, the number
It is connected according to entrance and the MIPI interface of data processing system, data outlet is connect with kernel layers；Surface flinger process
It is connect with Data entries and data outlet respectively, for handling the data in surface flinger frame；Step
S21: obtaining image data to be shown, is specifically as follows the figure layer data for obtaining APP application layer；Step S22: it will acquire
The figure layer data of APP application layer are passed by surface flinger layers of progress figure layer conversion, and by the new figure layer obtained after conversion
Enter to kernel layers；New figure layer is sent to electronic paper display panel by DPI interface driver hardware by S23:kernel layers of step,
Show electronic paper display panel.
Specifically, in step S22, the figure layer data for the APP application layer that will acquire pass through surface flinger layers
Figure layer conversion is carried out, conversion process includes step S220, S221 and step S222, wherein step S220: electronic paper display panel
Drive waveforms parsing, the RGB image data parameter of original image layer is parsed from the file header of drive waveforms；Step S221: will
The RGB data of original image layer is converted to the yuv data of brightness and color, and RGB data, which is converted to yuv data, can effectively improve Electronic Paper
Display panel shows the speed of picture；Step S222: tabling look-up according to drive waveforms, tables look-up and determines new figure layer (electronic paper display face
The displayable figure layer of plate) format, specially the current temperature data of electronic paper display panel, current refresh mode are joined
Several and brightness and color yuv data content is incoming, tables look-up and obtains the pixel content of new figure layer, the combination of all pixels content
Form the figure layer that electronic paper display panel is shown.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of display device of electronic paper, including data processing system and electronic paper display panel, which is characterized in that further include:
Interface conversion system is electrical connected with the data processing system, the electronic paper display panel respectively, and being used for will be described
The image data of data processing system interface output is converted to the interface data of the electronic paper display panel, and drives the electricity
Sub- paper display panel is shown.
2. display device of electronic paper according to claim 1, which is characterized in that the data processing system connects equipped with MIPI
Mouthful, the electronic paper display panel is equipped with DPI interface, and the interface conversion system is for meeting the data processing system MIPI
The image data of mouth output is converted to the DPI interface data of the electronic paper display panel.
3. display device of electronic paper according to claim 1, which is characterized in that the display device of electronic paper further includes temperature
Sensor is spent, the temperature sensor is electrical connected with the interface conversion system,
The temperature sensor is used to acquire the temperature data on the electronic paper display panel；
The interface conversion system is used in conjunction with the temperature data, the image data that the data processing system interface is exported
Be converted to the interface data of the electronic paper display panel.
4. display device of electronic paper according to claim 3, which is characterized in that the display device of electronic paper further includes mould
Formula setting apparatus, the mode setting device are electrical connected with the interface conversion system,
The mode setting device is used for the interface conversion system transmission pattern sets signal；
The interface conversion system is used in conjunction with the temperature data and the mode setting signal, by the data processing system
The image data of interface output is converted to the interface data of the electronic paper display panel.
5. display device of electronic paper according to claim 4, which is characterized in that the mode setting signal includes gray scale brush
One of new signal and black and white refresh signal.
6. display device of electronic paper according to claim 4, which is characterized in that the display device of electronic paper further include:
Identifier is electrical connected with the data processing system, the mode setting device respectively, is used for the mode setting device
Send the data type of the image data；
The mode setting device is electrical connected with the interface conversion system, the image data for being exported according to the identifier
Data type export the mode setting signal.
7. display device of electronic paper according to claim 4, which is characterized in that the display device of electronic paper further include:
Memory is electrical connected with the interface conversion system, is preset with drive waveforms in the memory；
The interface conversion system is used for according to the drive waveforms, in conjunction with the temperature data and the mode setting signal,
The image data that the data processing system interface exports is converted to the interface data of the electronic paper display panel.
8. display device of electronic paper according to claim 1, which is characterized in that the display device of electronic paper further includes electricity
Management system, the power-supply management system are electrical connected with the data processing system, the electronic paper display panel respectively,
The power-supply management system is used to export control voltage according to the data processing system, and the control voltage is used for the electricity
Sub- paper display panel provides display voltage.
9. display device of electronic paper according to claim 8, which is characterized in that the display voltage is ± 15V pulse electricity
Pressure.
10. display device of electronic paper according to claim 8, which is characterized in that the power-supply management system is total by being situated between
Line is electrical connected with the data processing system.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910092899.7A CN109637466A (en) | 2019-01-30 | 2019-01-30 | Display device of electronic paper |
| PCT/CN2019/120398 WO2020155809A1 (en) | 2019-01-30 | 2019-11-22 | Electronic paper display device |
| CN202010055428.1A CN111048048B (en) | 2019-01-30 | 2020-01-17 | Electronic paper display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910092899.7A CN109637466A (en) | 2019-01-30 | 2019-01-30 | Display device of electronic paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109637466A true CN109637466A (en) | 2019-04-16 |
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ID=66064316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910092899.7A Pending CN109637466A (en) | 2019-01-30 | 2019-01-30 | Display device of electronic paper |
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| Country | Link |
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| CN (1) | CN109637466A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020155809A1 (en) * | 2019-01-30 | 2020-08-06 | 掌阅科技股份有限公司 | Electronic paper display device |
-
2019
- 2019-01-30 CN CN201910092899.7A patent/CN109637466A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020155809A1 (en) * | 2019-01-30 | 2020-08-06 | 掌阅科技股份有限公司 | Electronic paper display device |
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Application publication date: 20190416 |