CN111048048A

CN111048048A - Electronic paper display device

Info

Publication number: CN111048048A
Application number: CN202010055428.1A
Authority: CN
Inventors: 程超; 李超军; 刘斌
Original assignee: Ireader Technology Co Ltd; Zhangyue Technology Co Ltd
Current assignee: Ireader Technology Co Ltd; Zhangyue Technology Co Ltd
Priority date: 2019-01-30
Filing date: 2020-01-17
Publication date: 2020-04-21
Anticipated expiration: 2040-01-17
Also published as: CN111048048B

Abstract

The invention relates to an electronic paper display device, which comprises a data processing system and an electronic paper display panel, wherein picture data output by an interface of the data processing system can be converted into interface data of the electronic paper display panel through an interface conversion system or a system-level chip, so that the electronic paper display panel is driven to display.

Description

Electronic paper display device

Technical Field

The invention relates to the field of electronic display, in particular to an electronic paper display device.

Background

Electronic ink screens, also known as electronic paper display panels, are widely used in portable devices such as electronic books due to their power saving characteristics. The display principle of the electronic ink screen is that different electric fields are applied between two electrodes to drive a plurality of microcapsules which are arranged between the two electrodes and have white particles with positive charges and black particles with negative charges, so that the charged particles change the upper and lower positions in the microcapsules to achieve the effect of displaying different gray scales. However, the conventional electronic ink screen has not yet realized displaying by receiving picture data output from a System On Chip (SOC).

Disclosure of Invention

The invention aims to provide an electronic paper display device which can realize that an electronic ink screen receives image data output by a system level chip for displaying.

An electronic paper display device comprising a data processing system, a display driving system and an electronic paper display panel, the display driving system comprising:

and the data conversion system is electrically connected with the data processing system and the electronic paper display panel respectively and is used for converting the picture data to be displayed output by the data processing system into interface data of the electronic paper display panel and driving the electronic paper display panel to display.

In the electronic paper display device, the data conversion system is electrically connected with the data processing system and the electronic paper display panel respectively, and can convert the picture data to be displayed output by the data processing system into the interface data of the electronic paper display panel, so that the electronic paper display panel is driven to display.

In one embodiment, the display driving system further comprises a temperature sensor electrically connected to the data conversion system,

the temperature sensor is used for acquiring temperature data on the electronic paper display panel;

and the data conversion system is used for converting the picture data to be displayed output by the data processing system into interface data of the electronic paper display panel by combining the temperature data.

In one embodiment, the display driving system further comprises a mode setter electrically connected to the data conversion system,

the mode setter is used for sending a mode setting signal to the data conversion system;

and the data conversion system is used for converting the picture data to be displayed output by the data processing system into interface data of the electronic paper display panel by combining the temperature data and the mode setting signal.

In one embodiment, the mode setting signal includes one of a grayscale refresh signal and a black and white refresh signal.

In one embodiment, the display driving system further includes:

the recognizer is electrically connected with the data processing system and the mode setter respectively and is used for sending the data type of the picture data to be displayed to the mode setter;

the mode setter is electrically connected with the data conversion system and used for outputting the mode setting signal according to the data type of the picture data to be displayed and output by the recognizer.

In one embodiment, the data processing system is provided with a USB interface, and the data processing system is electrically connected to the data conversion system through the USB interface.

In one embodiment, the display driving system further includes a power management system, the power management system is electrically connected to the data conversion system and the electronic paper display panel, respectively, the power management system is configured to output a control voltage according to the data conversion system, and the control voltage is configured to provide a display voltage for the electronic paper display panel.

In one embodiment, the display voltage is a ± 15V pulse voltage.

In one embodiment, the power management system is electrically connected to the data conversion system through a first interface bus or a general purpose input/output port.

In one embodiment, the data conversion system is electrically connected to the temperature sensor through a second interface bus.

The invention also provides an electronic paper display device which comprises an electronic paper display panel and a data processing system.

The electronic paper display panel includes: the electrophoretic display device comprises a top layer transparent electrode, an electrophoretic layer and a bottom layer thin film electrode, wherein the top layer transparent electrode and the bottom layer thin film electrode are used for applying voltage to two ends of the electrophoretic layer, the electrophoretic layer comprises a plurality of microcapsules, electrophoretic liquid and electrophoretic particles suspended in the electrophoretic liquid are contained in the microcapsules, and the electrophoretic particles move towards or away from the top layer transparent electrode in the electrophoretic liquid under the action of the voltage.

The data processing system includes: the temperature sensor is used for acquiring temperature data; the memory is used for storing a lookup table, and the lookup table is preset with a driving waveform; and the system level chip is provided with an interface matched with the electronic paper display panel, the system level chip is electrically connected with the electronic paper display panel through the interface, the system level chip finds out the corresponding driving waveform in the lookup table according to the temperature data, converts the picture data to be displayed into interface data and drives the electronic paper display panel to display. And the electronic paper display panel receives the interface data through the interface.

The invention also provides an electronic paper display device which comprises an electronic paper display panel and a data processing system. The data processing system includes: the temperature sensor is used for acquiring temperature data on the electronic paper display panel; and the system level chip is provided with an interface matched with the electronic paper display panel, is electrically connected with the electronic paper display panel through the interface, is respectively electrically connected with the temperature sensor and the electronic paper display panel, and converts picture data to be displayed into interface data of the electronic paper display panel according to the temperature data so as to drive the electronic paper display panel to display. And the electronic paper display panel receives the interface data through the interface.

The invention also provides an electronic paper display device which comprises an electronic paper display panel and a data processing system. The electronic paper display panel includes: the electronic paper display panel comprises a top layer transparent electrode, an electrophoretic layer and a bottom layer thin film electrode, wherein the electrophoretic layer comprises a plurality of microcapsules, electrophoretic liquid and electrophoretic particles suspended in the electrophoretic liquid are arranged in the microcapsules, the electronic paper display panel further comprises a plurality of scanning lines, a plurality of data lines and a plurality of thin film transistors, the crossed position of the scanning lines and the data lines is connected with one of the thin film transistors, and the thin film transistors are connected to the bottom layer thin film electrode.

The electronic paper display panel further includes: the temperature sensor is used for detecting temperature and converting the temperature into an electronic signal; the memory is used for storing a lookup table, and the lookup table records the relation between the electronic signal and the driving waveform; and the system-level chip is provided with an interface matched with the electronic paper display panel, is electrically connected with the electronic paper display panel through the interface, and finds out the corresponding driving waveform from the lookup table according to the electronic signal.

And responding to the driving waveform, applying voltage to the bottom layer thin film electrode to control the electrophoretic particles to move towards or away from the top layer transparent electrode in the electrophoretic liquid so as to carry out a black and white refresh mode, a full-screen refresh mode or a local refresh mode.

The present invention also provides an electronic paper display device, including:

the data processing system is used for outputting picture data to be displayed;

an electronic paper display panel comprising: the electrophoretic display device comprises a top layer transparent electrode, an electrophoretic layer and a bottom layer thin film electrode, wherein the top layer transparent electrode and the bottom layer thin film electrode are used for applying voltage to two ends of the electrophoretic layer, the electrophoretic layer comprises a plurality of microcapsules, electrophoretic liquid and electrophoretic particles suspended in the electrophoretic liquid are contained in the microcapsules, and the electrophoretic particles move in the electrophoretic liquid towards or away from the top layer transparent electrode under the action of the voltage;

the temperature sensor is used for acquiring temperature data;

the memory is used for storing a lookup table, and the lookup table is preset with a driving waveform; and

and the interface conversion system is electrically connected with the data processing system and the electronic paper display panel and is used for finding out the corresponding driving waveform in the lookup table according to the temperature data, converting the picture data to be displayed into the interface data of the electronic paper display panel and driving the electronic paper display panel to display.

the data processing system outputs picture data to be displayed;

an electronic paper display panel comprising: the electronic paper display panel also comprises a plurality of scanning lines, a plurality of data lines and a plurality of thin film transistors, wherein the staggered position of the scanning lines and the data lines is connected with one of the thin film transistors, and the thin film transistors are connected to the bottom thin film electrode;

the temperature sensor is used for detecting temperature and converting the temperature into an electronic signal;

the memory is used for storing a lookup table, and the lookup table records the relation between the electronic signal and the driving waveform; and

the interface conversion system is electrically connected with the data processing system, the electronic paper display panel, the temperature sensor and the memory and used for finding out corresponding driving waveforms from the lookup table according to the electronic signals;

and responding to the corresponding driving waveform, applying voltage to the bottom layer film electrode to control the electrophoretic particles to move towards or away from the top layer transparent electrode in the electrophoretic liquid so as to carry out a black and white refresh mode, a full-screen refresh mode or a local refresh mode.

Drawings

FIG. 1 is a schematic diagram of an embodiment of an electronic paper display device;

FIG. 2 is a block diagram of a data processing system in accordance with an embodiment;

FIG. 3 is a block diagram of a data processing system in accordance with another embodiment;

FIG. 4 is a block diagram of a data processing system in accordance with yet another embodiment;

FIG. 5 is a schematic diagram illustrating an embodiment of an electronic paper display device;

FIG. 6 is a schematic diagram illustrating an embodiment of an electronic paper display device;

FIG. 7 is a schematic diagram of an electronic paper display device according to another embodiment;

FIG. 8 is a schematic diagram of a display device of an electronic paper according to yet another embodiment;

FIG. 9 is a schematic diagram of a structure of an electronic paper display device in yet another embodiment;

FIG. 10 is a schematic diagram of an embodiment of electronic ink;

FIG. 11 is a schematic diagram of a circuit structure of an electronic paper display panel according to an embodiment; and

fig. 12 is a schematic structural diagram of an electronic paper display device in yet another embodiment.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present invention, "a plurality" means at least one, e.g., one, two, etc., unless specifically limited otherwise.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic paper display device in an embodiment.

An electronic paper display device 100 comprises a data processing system 110 and an electronic paper display panel 120, wherein the data processing system 110 comprises a system-on-chip 111, the system-on-chip 111 is provided with an interface matched with the electronic paper display panel 120, the system-on-chip 111 is electrically connected with the electronic paper display panel 120 through the interface, and the system-on-chip 111 is used for converting picture data to be displayed into interface data of the electronic paper display panel 120 and driving the electronic paper display panel 120 to display the picture data.

The electronic paper display panel 120 includes a top transparent electrode, an electrophoretic layer, and a bottom thin film electrode, which are sequentially stacked and connected, the top transparent electrode and the bottom thin film electrode are used for applying voltage to two ends of the electrophoretic layer, the electrophoretic layer includes a plurality of microcapsules, electrophoretic fluid and electrophoretic particles suspended in the electrophoretic fluid are provided in the microcapsules, and the electrophoretic particles move towards or away from the top transparent electrode and the bottom thin film electrode in the electrophoretic fluid under the action of the voltage between the top transparent electrode and the bottom thin film electrode. Specifically, each microcapsule comprises a plurality of positively charged black particles and negatively charged white particles, when a positive voltage is applied to two ends of the microcapsule, the positively charged black particles move to one side close to the top transparent electrode, so that the electronic paper display panel displays a required picture, and the negatively charged white particles move to one side close to the bottom thin film electrode; when a negative voltage is applied across the microcapsules, the negatively charged white particles move to the side of the top transparent electrode and the positively charged black particles move to the side near the bottom thin film electrode.

Specifically, the system on chip is mainly used for processing and outputting RGB picture data to be displayed, and specifically may include color processing and noise reduction processing.

In the electronic paper display device 100, the data processing system 110 includes the system on chip 111, and the system on chip 111 is provided with an interface adapted to the electronic paper display panel 120, and is electrically connected to the electronic paper display panel 120 through the interface, and can convert the picture data to be displayed into interface data of the electronic paper display panel 120, so as to drive the electronic paper display panel 120 to display.

In one embodiment, the system-on-chip 111 is provided with a DPI interface, and the system-on-chip 111 is electrically connected to the electronic paper display panel 120 through the DPI interface.

In this embodiment, since the conventional electronic paper display panel 120 is usually provided with a DPI interface, the system-on-chip 111 provided with the DPI interface can be directly electrically connected to the electronic paper display panel 120, and specifically, the data line pin and the control line pin in the DPI interface of the system-on-chip 111 are correspondingly connected to the data line and the control line pin of the DPI interface of the electronic paper display panel 120.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a data processing system in an embodiment, the data processing system 110 further includes a temperature sensor 112 and/or a mode setter 113, the temperature sensor 112 and the mode setter 113 are respectively electrically connected to the system on chip 111, wherein,

the temperature sensor 112 is used for collecting temperature data on the electronic paper display panel 120;

the mode setter 113 is configured to send a mode setting signal to the system on chip 111;

the system on chip 111 is used for converting the picture data to be displayed into interface data of the e-paper display panel 120 in combination with the temperature data and/or the mode setting signal.

In this embodiment, since the black and white particles in the electrophoretic layer of the electronic paper display panel 120 are sensitive to temperature, the lower the temperature is, the poorer the activity of the particles is, and the longer the time required for the particles to move to the same position in the microcapsule at normal temperature is; the higher the temperature, the faster the particles move, and the relatively shorter the time required to move to the same location in the microcapsule at room temperature. In view of the characteristic of the electronic paper display panel 120, the data processing system 110 is additionally provided with the temperature sensor 112, wherein the temperature sensor 112 may be a diode, a thermistor, or another material, and is not limited herein. When the diode is selected as the temperature sensor, the current passing through the diode is influenced by the change of the temperature, and the circuit board can calculate the temperature value by detecting the current passing through the diode.

The data processing system 110 may further include a mode setter 113, where the mode setter 113 is configured to send a mode setting signal to the system-on-chip 111, where the mode setting signal may include a refresh signal. Although the electronic paper display panel 120 has the advantages of low power consumption due to its operating characteristics, in order to accurately display a certain gray-scale color, it is necessary to move the positively charged black particles and the negatively charged white particles in the microcapsules to proper positions, and control the direction and duration of the electric field between the top transparent electrode and the bottom thin film electrode, so that the display can be realized only by driving the black and white particles through multiple refreshes, and the mode setter 113 can output different refresh signals according to the data type of the picture data to be displayed, so as to improve the display efficiency.

In an embodiment, the data processing system 110 may further include a memory 114, the memory 114 is electrically connected to the system on chip 111, the memory 114 is mainly composed of a lookup table, a corresponding driving waveform of the e-paper display panel 120 is preset in the lookup table, the system on chip 111 converts the picture data to be displayed into interface data of the e-paper display panel 120 according to the driving waveform in the memory table 114, in combination with the temperature data and/or the mode setting signal, and the driving waveform is a driving waveform of the e-paper display panel 120 under different mode setting signals and different temperature data. The memory 114 may be a flash memory, which is used to permanently retain stored information without power up.

In one embodiment, the mode setting signal sent by the mode setter 113 to the system-on-chip 111 may include one of a grayscale refresh signal and a black-and-white refresh signal.

In this embodiment, the mode setting signal is used to set the display mode of the electronic paper display panel 120, and the mode setting signal includes one of a grayscale refresh signal and a black-and-white refresh signal, where, when the mode setting signal is the grayscale refresh signal, it takes at least 780ms (this value is for a 6-inch electronic ink screen, a 5-inch electronic ink screen foam has a shorter full-screen refresh time under the grayscale refresh signal, and a 9-inch electronic ink screen has a longer full-screen refresh time under the grayscale refresh signal) for a full-screen refresh once, and the grayscale refresh signal further includes a 2-level (a2 refresh), a 4-level (GC4 refresh) or a 16-level (GC16 refresh) grayscale refresh signal, which can provide different levels of grayscale for the electronic paper display panel 120 for display; when the mode setting signal is a black-and-white refresh signal, the electronic paper display panel 120 needs at least 200ms for a full screen refresh (for a 6-inch electronic ink screen, a full screen refresh time of a 5-inch electronic ink screen foam is shorter under the black-and-white refresh signal, and a full screen refresh time of a 9-inch electronic ink screen is longer under the black-and-white refresh signal), and the black-and-white refresh signal can only provide black and white for the electronic paper display panel 120 to display.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a data processing system in another embodiment, where the data processing system 110 further includes:

the identifier 115 is electrically connected with the mode setter 113 and is used for sending the data type of the picture data to be displayed to the mode setter 113;

a mode setter 113 for outputting a mode setting signal according to a data type of the picture data to be displayed output by the recognizer 115.

In this embodiment, the recognizer 115 is configured to send a data type of the picture data to the mode setter 113, the data type of the picture data including a text data type, a graphic data type, and/or an image data type, and the mode setter 113 is configured to output a mode setting signal for setting a display mode of the electronic paper display panel 120 according to the data type of the picture data output by the recognizer 115. Specifically, when the data type of the picture data only includes a text data type and/or a graphic data type, the mode setter 113 outputs a black-and-white refresh signal; when the data type of the picture data includes an image data type, the mode setter 113 outputs a gradation refresh signal. The identifier 115 may be implemented by a hardware circuit or a chip with fixed functions, such as an FPGA circuit configured with functions, which is capable of performing a logic operation on input specific data, such as text, graphic data, etc., to obtain and output one of several specific types of signals to indicate the type of the input data.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a data processing system in another embodiment, where the data processing system 110 further includes a power management system 116, the power management system 116 is electrically connected to the system on chip 111 and the e-paper display panel 120, respectively, and the power management system 116 is configured to output a control voltage according to the system on chip 111, where the control voltage is used to provide a display voltage for the e-paper display panel 120.

In the embodiment, the data processing system 110 includes a power management system 116, and the power management system 116 is configured to provide a display voltage to the electronic paper display panel 120, and since the electronic paper display panel 120 only needs to provide power during refresh, the power management system 116 can provide the display voltage during refresh of the electronic paper display panel 120.

Specifically, the voltage required for the normal operation of the e-paper display panel 120 is ± 15V, and the display voltage provided by the power management system 116 is ± 15V pulse voltage.

In one embodiment, the power management system 116 is electrically connected to the system-on-chip 111 through a first inter-bus (I2C bus), but the connection is not limited to this, as long as the power management system 116 and the system-on-chip 111 can be electrically connected.

In one embodiment, the system-on-chip 111 is electrically connected to the temperature sensor 112 through a second bus.

In the embodiment, the soc 111 is electrically connected to the temperature sensor 112 through the bus, and the I2C bus is a two-wire serial bus with an interface directly on the component, which not only reduces the number of pins of the chip, but also saves the space occupied by the circuit board.

Specifically, system-on-chip 111 includes an MTK8167 chip.

In this embodiment, when the system-on-chip 111 includes the MTK8167 chip, the overall hardware connection structure of the electronic paper display device 100 is as follows: the system level chip 111 is provided with a DPI interface, the electronic paper display panel is also provided with a DPI interface, and the DPI interface of the system level chip 111 is electrically connected with the DPI interface of the electronic paper display panel 120. The working principle is as follows: the system on chip 111 converts the picture data to be displayed into interface data of the electronic paper display panel.

Specifically, the software implementation method includes the driver layer debugging of the system-on-chip 111 and the data processing of the system-on-chip 111, where the driver layer debugging of the system-on-chip 111 includes configuring timing parameters of the DPI interface according to parameter requirements of the electronic paper display panel 120, and the configuration parameters include configuring temperature data, display mode parameters, and the like of the electronic paper display panel 120.

The process of data processing of the system-on-chip 111 includes steps S20, S21, S22, and S23, wherein step S20: setting a surface flinger layer, and constructing a surface flinger frame and a surface flinger process in the surface flinger layer, wherein the surface flinger frame is used for transmitting data and comprises a data inlet and a data outlet, the data inlet is connected with a DPI interface of the system level chip, and the data outlet is connected with a kernel layer; the surface flinger process is connected with the data inlet and the data outlet respectively and used for processing data in the surface flinger frame; step S21: acquiring picture data to be displayed, specifically layer data of an APP (application) layer; step S22: carrying out layer conversion on the obtained layer data of the APP application layer through a surface flicker layer, and transmitting a new layer obtained after conversion into a kernel layer; step S23: and the kernel layer transmits the new image layer to the electronic paper display panel through the DPI interface driving hardware, so that the electronic paper display panel displays the new image layer.

Specifically, in step S22, the obtained image layer data of the APP application layer is subjected to image layer conversion through the surface flicker layer, where the conversion process includes steps S220, S221 and S222, where step S220: analyzing a driving waveform of the electronic paper display panel, and analyzing RGB picture data parameters of an original layer from a file header of the driving waveform; step S221: the RGB data of the original layer is converted into YUV data of brightness and color, and the conversion from the RGB data to the YUV data can effectively improve the speed of displaying pictures on the electronic paper display panel; step S222: and looking up a table according to the driving waveform, wherein the table is looked up to determine the format of a new layer (a layer which can be displayed by the electronic paper display panel), specifically, the current temperature data, the current refresh mode parameter and the YUV data content of the brightness color of the electronic paper display panel are transmitted, the pixel content of the new layer is obtained by looking up the table, and the combination of all the pixel contents forms the layer displayed by the electronic paper display panel.

Referring to fig. 5, fig. 5 is a schematic structural view of an electronic paper display device in another embodiment.

An electronic paper display device 500 comprising a data processing system 510 and an electronic paper display panel 530, differs from the previous embodiment in further comprising:

the interface conversion system 520 is electrically connected to the data processing system 510 and the electronic paper display panel 530, respectively, and is configured to convert the image data output by the interface of the data processing system 510 into interface data of the electronic paper display panel 530, and drive the electronic paper display panel 530 to display the image data.

In this embodiment, the interface conversion system 520 converts the picture data output by the interface of the data processing system 510 into the interface data of the electronic paper display panel 530, specifically, the interface conversion system 520 converts the interface of the data processing system 510 into an interface matched with the electronic paper display panel 530, so as to perform data transmission through the interface.

In the electronic paper display device 500, the interface conversion system 520 is electrically connected to the data processing system 510 and the electronic paper display panel 530 respectively, and can convert the image data output from the interface of the data processing system 510 into the interface data of the electronic paper display panel 530, so as to drive the electronic paper display panel 530 to display.

In one embodiment, the data processing system 510 is provided with a MIPI interface, the electronic paper display panel 530 is provided with a DPI interface, and the interface conversion system 520 is configured to convert the picture data output by the MIPI interface of the data processing system 510 into DPI interface data of the electronic paper display panel 530.

In this embodiment, since the conventional data processing system 510 is usually provided with the MIPI interface, and the conventional electronic paper display panel 530 is usually provided with the DPI interface, the MIPI interface of the data processing system 510 is electrically connected to the DPI interface of the electronic paper display panel 530 through the interface conversion system 520, so that the image data output by the MIPI interface of the data processing system 510 can be converted into the DPI interface data of the electronic paper display panel 530, and the electronic paper display panel 530 is driven to display.

Referring to fig. 6, fig. 6 is a schematic structural diagram of an electronic paper display device in another embodiment, the electronic paper display device 500 further includes a temperature sensor 540 and/or a mode setter 550, the temperature sensor 540 and the mode setter 550 are respectively electrically connected to the interface conversion system 520, wherein,

the temperature sensor 540 is used for collecting temperature data on the electronic paper display panel 530;

the mode setter 550 is configured to send a mode setting signal to the interface conversion system 520;

the interface conversion system 520 is used for converting the picture data output by the interface of the data processing system 510 into the interface data of the e-paper display panel 530 according to the temperature data and/or the mode setting signal.

The electronic paper display device 500 may further include a mode setter 550, and the mode setter 550 is configured to send a mode setting signal to the interface conversion system 520, where the mode setting signal may include a refresh signal. Although the e-paper display panel 530 has the advantages of low power consumption due to its operating characteristics, in order to accurately display a certain gray-scale color, it is necessary to move the positively charged black particles and negatively charged white particles in the microcapsules to proper positions, and control the direction and duration of the electric field between the top transparent electrode and the bottom thin film electrode, so that the black and white particles are driven by multiple refreshes, and the mode setter 550 can output different refresh signals according to the data type of the picture data output from the interface of the data processing system 510, so as to improve the display efficiency.

In one embodiment, the electronic paper display device 500 may further include a memory 560, the memory 560 is electrically connected to the interface conversion system 520, the memory 560 mainly includes a lookup table, a corresponding driving waveform of the electronic paper display panel 530 is preset in the lookup table, the interface conversion system 520 converts the picture data output by the interface of the data processing system 510 into the interface data of the electronic paper display panel 530 according to the driving waveform in the memory table 560, in combination with the temperature data and/or the mode setting signal, and the driving waveform is the driving waveform of the electronic paper display panel 530 under different mode setting signals and different temperature data. The memory 560 may be a flash memory, and the stored information may be permanently maintained without power-up.

In one embodiment, the mode setting signal sent by the mode setter 550 to the interface conversion system 520 may include one of a grayscale refresh signal and a black and white refresh signal. The mode setting signal is similar to the previous embodiment and is not described again.

Referring to fig. 7, fig. 7 is a schematic structural diagram of an electronic paper display device in another embodiment, where the electronic paper display device 500 further includes:

the identifier 570, electrically connected to the data processing system 510 and the mode setter 550 respectively, for sending the data type of the image data to the mode setter 550;

the mode setter 550 is electrically connected to the interface conversion system 520, and is configured to output a mode setting signal according to a data type of the picture data output by the identifier 570.

The operations of the identifier 570 and the mode setter 550 are similar to those of the previous embodiments and are not described again.

Referring to fig. 8, fig. 8 is a schematic structural diagram of an electronic paper display device in yet another embodiment, where the electronic paper display device 500 further includes a power management system 580, the power management system 580 is electrically connected to the data processing system 510 and the electronic paper display panel 530, respectively, and the power management system 580 is configured to output a control voltage according to the data processing system 510, where the control voltage is used to provide a display voltage for the electronic paper display panel 530.

In this embodiment, the e-paper display apparatus 500 includes a power management system 580, the power management system 580 is used for providing a display voltage to the e-paper display panel 530, and since the e-paper display panel 530 only needs to provide power during refresh, the power management system 580 can provide the display voltage during refresh of the e-paper display panel 530.

Specifically, the voltage required for the e-paper display panel 530 to operate normally is ± 15V, and the display voltage provided by the power management system 580 is ± 15V pulse voltage.

In one embodiment, the power management system 580 is electrically coupled to the data processing system 510 via a bus (I2C bus), but is not limited to these two connections, as long as the power management system 580 and the data processing system 510 are electrically coupled.

Specifically, the interface conversion system 520 includes a toshiba conversion chip.

In this embodiment, when the interface conversion system 520 includes the toshiba conversion chip, the whole hardware connection structure of the electronic paper display device 500 is: data processing system 510 is equipped with the MIPI interface, and electron paper display panel 530 is equipped with the DPI interface, and data processing system 510's MIPI interface passes through Toshiba conversion chip and electron paper display panel 530's DPI interface electric connection. The working principle is as follows: the interface conversion system 520 converts the picture data output by the MIPI interface of the data processing system 510 into DPI interface data of the electronic paper display panel 530, and drives the electronic paper display panel 530 to display.

Specifically, the software implementation method includes the driver layer debugging of the data processing system 510 and the data processing of the toshiba conversion chip, wherein the driver layer debugging process of the data processing system 510 includes steps S10, S11, and S12, wherein the step S10: driving the chip according to the initialization parameters of the Toshiba conversion chip; step S11: adjusting the MIPI clock to be consistent with the Toshiba conversion chip clock; step S13: and configuring the time sequence parameters of the DPI interface according to the parameter requirements of the electronic paper display panel 530, wherein the configuration parameters comprise temperature data, display mode parameters and the like for configuring the electronic paper display panel 530.

The process of data processing of the toshiba conversion chip includes steps S20, S21, S22, and S23, wherein step S20: setting a surface flinger layer, and constructing a surface flinger frame and a surface flinger process in the surface flinger layer, wherein the surface flinger frame is used for transmitting data and comprises a data inlet and a data outlet, the data inlet is connected with an MIPI (million instructions per second) interface of a data processing system, and the data outlet is connected with a kernel layer; the surface flinger process is connected with the data inlet and the data outlet respectively and used for processing data in the surface flinger frame; step S21: acquiring picture data to be displayed, specifically layer data of an APP (application) layer; step S22: carrying out layer conversion on the obtained layer data of the APP application layer through a surface flicker layer, and transmitting a new layer obtained after conversion into a kernel layer; step S23: and the kernel layer transmits the new image layer to the electronic paper display panel through the DPI interface driving hardware, so that the electronic paper display panel displays the new image layer.

Specifically, in step S22, the obtained image layer data of the APP application layer is subjected to image layer conversion through the surface flicker layer, where the conversion process includes steps S220, S221 and S222, where step S220: analyzing a driving waveform of the electronic paper display panel, and analyzing RGB picture data parameters of an original layer from a file header of the driving waveform; step S221: the RGB data of the original layer is converted into YUV data of brightness and color, and the speed of displaying pictures on the electronic paper display panel can be effectively improved by converting the RGB data into the YUV data; step S222: and looking up a table according to the driving waveform, wherein the table is looked up to determine the format of a new layer (a layer which can be displayed by the electronic paper display panel), specifically, the current temperature data, the current refresh mode parameter and the YUV data content of the brightness color of the electronic paper display panel are transmitted, the pixel content of the new layer is obtained by looking up the table, and the combination of all the pixel contents forms the layer displayed by the electronic paper display panel.

Fig. 9 shows a schematic structural diagram of an electronic paper display device in another embodiment, where the electronic paper display device includes a data processing system 910 and an electronic paper display panel 920, the data processing system 910 includes a system-on-chip 911, the system-on-chip 911 is provided with an interface adapted to the electronic paper display panel 920, the system-on-chip 911 is electrically connected to the electronic paper display panel 920 through the interface, and the system-on-chip 911 is used to convert picture data to be displayed into interface data of the electronic paper display panel 920 and drive the electronic paper display panel 920 to display the interface data.

The system-on-chip 911 is provided with a DPI interface, and the system-on-chip 911 is electrically connected to the electronic paper display panel 920 through the DPI interface.

The electronic paper display panel 920 is usually provided with a DPI interface, and the system-on-chip 911 provided with the DPI interface can be directly electrically connected to the electronic paper display panel 920, specifically, a data line pin and a control line pin in the DPI interface of the system-on-chip 911 are correspondingly connected to a data line and a control line pin of the DPI interface of the electronic paper display panel 920.

The data processing conversion system 910 further includes a temperature sensor 912, a mode setter 913, and a memory 914, and the system-on-chip 911, the temperature sensor 912, the mode setter 913, and the memory 914 are respectively the same as the system-on-chip 111, the temperature sensor 112, the mode setter 113, and the memory 114, and thus are not described in detail.

The electronic paper display panel 920 includes a driver 921 electrically connected to the system-on-chip 911 for driving the electronic paper display panel 920, the temperature sensor 912 is disposed on the electronic paper display panel 920 for sensing the temperature of the electronic paper display panel 920, and the system-on-chip 911 includes a timing controller electrically connected to the temperature sensor 912, the mode setter 913, and the memory 914 for outputting interface data to control the driver 921 to drive the electronic paper display panel 920. In this embodiment, the interface data includes drive waveforms (waveforms) stored by the memory 914, such as drive voltages, duty cycles, pulse times, and the like.

The e-paper display panel 920 is an electronic ink, which in this embodiment may be black and white or color. Taking black and white as an example, the main structure is shown in fig. 10, and the electronic paper 1000 includes a top transparent electrode layer 1010, an electrophoretic layer 1020, and a bottom thin film electrode 1030. The electrophoretic layer 1020 has a plurality of fine microcapsules 1040, the microcapsules 1040 have an electrophoretic fluid 1042 and a plurality of small

electrophoretic particles

1044, 1046, the

electrophoretic particles

1044, 1046 are distributed in the transparent electrophoretic fluid 1042 to form a suspension system, each

electrophoretic particle

1044, 1046 has a diameter of about 600 μm and can move under the action of an applied electric field.

The

electrophoretic particles

1044 and 1046 are respectively black and white charged particles, and for the convenience of control, the charges are opposite. In this embodiment, the

electrophoretic particles

1044, 1046 are negatively charged black particles 1044 and positively charged white particles 1046, respectively. When a positive voltage is applied to the bottom thin film electrode 1030, the white particles 1046 are repelled to move toward the top transparent electrode layer 1010, and the black particles 1044 are attracted to move toward the bottom thin film electrode 1030, in which case the pixel appears white. Conversely, when a negative voltage is applied to the bottom thin-film electrode 1030, the white particles 1046 are attracted to move toward the bottom thin-film electrode 1030, the black particles 1044 are repelled to move toward the top transparent electrode layer 1010, and the pixel appears black.

If positive and negative voltages are applied to different electrodes of the bottom thin-film electrode 1030 respectively, some white particles 1046 and black particles 1044 move towards the top transparent electrode layer 1010, and the proportion of the white particles 1046 and the black particles 1044 floating up to the top transparent electrode layer 1010 is adjusted by controlling the magnitude of the positive and negative voltages applied to the bottom thin-film electrode 1030, so that gray scale display is realized.

For an electrophoretic display panel with only two types of black and white particles, the display of all pictures on the electronic paper display panel 920 can only be made of two colors, so that for a color picture, it is necessary to convert it into a black and white picture, and usually the shade (i.e. gray scale) of the black and white image is used to represent the chroma of the picture.

When displaying gray scales of the electronic paper display panel 920, the electrophoretic particles need to be maintained at proper positions in the microcapsule space, and the voltage sequence for causing the black particles 1044 and the white particles 1046 to generate electrophoretic motion is the driving waveform of the electronic paper display panel 920.

If the electronic ink is a color electronic ink, it can be composed of black and white red particles or black and white yellow particles, or a filter of three primary colors RBG is added on the microcapsule with black and white particles to form a sub-pixel of three primary colors, and the chroma of the pixel is determined by controlling the floating ratio of the white particles and black particles of each microcapsule, and the three primary colors are mixed to display a specific color. Or, particles with multiple colors, such as white, yellow, cyan, magenta and the like, are placed in the same microcapsule, the particles with different colors have different polarities, sizes and charge intensities, the positions of the particles suspended in the microcapsule are determined by controlling the voltage between the top transparent electrode and the bottom thin film electrode, and then the specific color is displayed, so that the color electronic ink can display 3 thousands of colors.

The memory 914 stores a lookup table that can find the appropriate driving waveform based on data including pixel data, VCON voltage, temperature, refresh mode, etc. Wherein temperature is a main data because the electronic ink is sensitive to temperature, and when the temperature is low, the activity of the particles is poor, and the time required for moving to a specific position of the microcapsule is increased; when the temperature is high, the particles move fast and the time required to move to a specific location of the microcapsule is short. Therefore, temperature affects the driving voltage and duty cycle.

Fig. 11 is a schematic circuit diagram of the electronic paper display panel 920. As shown in fig. 11, the e-paper display panel 920 includes a plurality of vertical and horizontal scan lines 1102 and data lines 1104, and a thin film transistor 1106 is connected at an intersection of each scan line 1102 and data line 1104 to form a pixel 1108. Each TFT 1106 is connected to the bottom thin film electrode 1030 for driving the corresponding pixel 1108, wherein the gate of the TFT 1106 is connected to the scan line 1102, and the source or drain is connected to the data line 1104. The scan line 1102 and the data line 1104 are respectively connected to a driver 921, and the driver 921 includes a gate driving circuit and a source/drain driving circuit for respectively outputting signals to the scan line 1102 and the data line 1104 to control each of the thin film transistors 1106.

In the process of this embodiment, the temperature sensor 912 may be formed during the formation of the gate electrode layer or the source/drain electrode layer of the thin film transistor 1106, such that the temperature sensor 912 is located at the same layer as the gate electrode layer or the source/drain electrode layer. The material of the temperature sensor 912 may be the same as the gate electrode layer or the source/drain electrode layer, such as chromium or aluminum. The temperature sensor 912 may be disposed on a layer other than the gate electrode layer and the source/drain electrode layer. The circuit layout of the temperature sensor 912 may be determined according to the actual application based on the principle that the circuit layout is uniformly distributed in the electronic paper display panel 920.

Further, the temperature sensor 912 may be made of a diode, a thermistor, or other materials, but not limited thereto. Taking a diode as an example, the temperature variation affects the current passing through the diode, and the system on chip 911 can obtain the temperature value by detecting the electrical signal (i.e., current) passing through the diode. Taking thermistors as an example, they are classified into positive temperature coefficient thermistors (PTC) and negative temperature coefficient thermistors (NTC) according to their temperature coefficients, and both of these thermistors can be used. The thermistor has different resistance values at different temperatures, the positive temperature coefficient thermistor has a higher resistance value at higher temperatures, and the negative temperature coefficient thermistor has a lower resistance value at higher temperatures, and generally, the resistance value is linear with the temperature. Based on the current temperature, the temperature sensor 912 generates a corresponding resistance value, and when current flows through the temperature sensor 912, a corresponding electrical signal (i.e., voltage) is generated, which reflects the current temperature.

The electronic signal is transmitted to the soc 911, the soc 911 reads a corresponding driving waveform from the lookup table in the memory 914 based on all data, and the soc 911 controls the driver 921 to drive the electronic paper display panel 920 according to the driving waveform.

The mode setting device 913 provides a mode setting signal to the soc 911 according to the data type of the picture data to be displayed, where the mode setting signal includes the following refresh modes:

a2: the gray scale content displayed originally is presented in black and white, so that the time and power consumption brought by rendering the gray scale are reduced, and the refreshing speed is fastest. Generally in the context of plain text or mostly text.

DU: the gray-scale content displayed originally is presented in black and white, the refresh rate is second to A2, but the afterimage is less than A2. Generally in the context of plain text or mostly text.

GC: all pixels are output again, and before output, a screen clearing operation is performed, which can be subdivided into GC4, GC8, GC16, etc., which respectively indicate that 4, 8 and 16 gray scales can be supported, the refreshing speed is slowest, but the residual shadow is least. The GC refresh is also called full-screen refresh, i.e. the entire page is refreshed once, regardless of whether the front and rear gray levels of the same pixel change. Due to the fact that the electronic ink particles are completely rearranged in the page turning process, the screen can be obviously blacked. Generally in the context of graphics.

GU: the pixels that are not cleared before data output but directly output and changed from the previous output include GU8, GU16, etc., which indicate that 8 and 16 gray levels are supported, respectively, and the refresh rate is slower than a2 and DU but faster than GC. GU refreshing is also called partial refreshing, the speed is acceptable when the page is turned, and the page change is smooth. Although no obvious black screen phenomenon is observed visually, the afterimage is more and more serious after the pages are turned for many times. Generally in the context of images, i.e. video.

GL: the data is not cleared before being output, which is generally GL16, which supports 16 gray levels, and the refresh rate is slower than A2 and DU but faster than GC. GL refresh is also partial refresh, there is no obvious black screen phenomenon visually, but after many page turns, the ghost is more and more serious. Generally in the context of images, i.e. video.

GLR: also known as "regal", which is generally called GLR16, that is, supporting 16 gray levels, similar to partial refresh, the refresh mode depends on the difference between the front and back frames, especially if the front and back frames go from black to black, the black and white flash is performed. The refresh rate is close to the local refresh mode, and the residual image is less. Generally in the context of images, i.e. video.

In more detail, the driver 921 applies appropriate voltages to the bottom thin-film electrode 1030 in response to the driving waveforms to control the

electrophoretic particles

1044 and 1046 to move towards or away from the top transparent electrode 1010 in the electrophoretic solution 1042, so as to perform the black-and-white refresh mode, the full-screen refresh mode, or the partial refresh mode.

According to the above description, the local refreshing speed is ideal and does not affect reading, and the defects are that after the screen is refreshed for several times, a hidden visible ghost can appear, the page refreshed through the full screen is very clean, and the defects are that the refreshing speed is slow and the screen flashing phenomenon exists. Therefore, the system on chip 911 of this embodiment can be configured to use a local refresh mode during reading, so that page turning is faster, but the occurrence of the residual printing affects the full-screen refresh during reading. Specifically, the system-on-chip 911 may be configured to automatically perform a full-screen refresh operation after a few partial refreshes, for example: and executing full-screen refreshing after local refreshing is carried out for 3 times, 5 times or 10 times so as to take the refreshing speed into consideration and solve the problem of ghost shadow.

Fig. 12 is a schematic structural diagram of an electronic paper display device in another embodiment, where the electronic paper display device includes a data processing system 1210, an interface conversion system 1221, and an electronic paper display panel 1230. The interface conversion system 1221 is electrically connected to the data processing system 1210 and the electronic paper display panel 1230, respectively, and is configured to convert the image data output by the interface of the data processing system 1210 into interface data of the electronic paper display panel 1230, and drive the electronic paper display panel 1230 to display the image data.

In this embodiment, the interface conversion system 1221 converts the image data output by the interface of the data processing system 1210 into interface data of the electronic paper display panel 1230, specifically, the interface conversion system 1221 converts the interface of the data processing system 1210 into an interface matched with the electronic paper display panel 1230, so as to perform data transmission through the interface.

In this embodiment, the data processing system 1210 is provided with an MIPI interface, the electronic paper display panel 1230 is provided with a DPI interface, and the interface conversion system 1221 is configured to convert the picture data output by the MIPI interface of the data processing system 1210 into DPI interface data of the electronic paper display panel 1230.

The electronic paper display device further includes a temperature sensor 1222, a mode setter 1223, and a memory 1224, and the electronic paper display panel 1230 includes a driver 1231. The data processing system 1210, the interface conversion system 1221, the temperature sensor 1222, the mode setter 1223, the memory 1224, and the driver 1231 are the same as the data processing system 510, the interface conversion system 520, the temperature sensor 540, the mode setter 550, the memory 560, and the driver 921, respectively, and thus are not described again.

The driver 1231 is electrically connected to the interface conversion system 1221 for driving the electronic paper display panel 1230, the temperature sensor 1222 is disposed on the electronic paper display panel 1230 for sensing the temperature of the electronic paper display panel 1230, and the interface conversion system 1221 includes a timing controller electrically connected to the temperature sensor 1222, the mode setter 1223 and the memory 1224 for outputting interface data to control the driver 1231 to drive the electronic paper display panel 1230. In this embodiment, the interface data includes drive waveforms stored by the memory 1224, such as drive voltages, duty cycles, pulse counts, and the like.

The e-paper display panel 1230 is an electronic ink, which in this embodiment can be black and white or color. Taking black and white as an example, the main structure is also shown in fig. 10, and will not be described again. If the electronic ink is a color electronic ink, it can be composed of black and white red particles or black and white yellow particles, or a filter of three primary colors RBG is added on the microcapsule with black and white particles to form a sub-pixel of three primary colors, and the chroma of the pixel is determined by controlling the floating ratio of the white particles and black particles of each microcapsule, and the three primary colors are mixed to display a specific color. Or, particles with multiple colors, such as white, yellow, cyan, magenta and the like, are placed in the same microcapsule, the particles with different colors have different polarities, sizes and charge intensities, the positions of the particles suspended in the microcapsule are determined by controlling the voltage between the top transparent electrode and the bottom thin film electrode, and then the specific color is displayed, so that the color electronic ink can display 3 thousands of colors.

The memory 1224 stores a lookup table that can find suitable driving waveforms based on data including pixel data, VCON voltage, temperature, refresh mode, etc. Wherein temperature is a main data because the electronic ink is sensitive to temperature, and when the temperature is low, the activity of the particles is poor, and the time required for moving to a specific position of the microcapsule is increased; when the temperature is high, the particles move fast and the time required to move to a specific location of the microcapsule is short. Therefore, temperature affects the driving voltage and duty cycle.

The circuit structure of the electronic paper display panel 1230 is also shown in fig. 11, and is not repeated.

In the manufacturing process of this embodiment, the temperature sensor 1222 may also be formed when forming the gate electrode layer or the source/drain electrode layer of the thin film transistor 1106, so that the temperature sensor 1222 is located at the same layer as the gate electrode layer or the source/drain electrode layer. The temperature sensor 1222 may be made of the same material as the gate electrode layer or the source/drain electrode layer, such as chromium or aluminum. The temperature sensor 1222 may be disposed on other layers than the gate electrode layer and the source/drain electrode layer. The circuit layout of the temperature sensor 1222 is uniformly distributed in the electronic paper display panel 1230, and may be determined according to practical applications.

Further, the temperature sensor 1222 may be made of, but not limited to, a diode, a thermistor, or other materials. Taking a diode as an example, the temperature change affects the current passing through the diode, and the interface conversion system 1221 can obtain the temperature value by detecting the electrical signal (i.e. current) passing through the diode. Taking thermistors as an example, they are classified into positive temperature coefficient thermistors (PTC) and negative temperature coefficient thermistors (NTC) according to their temperature coefficients, and both of these thermistors can be used. The thermistor has different resistance values at different temperatures, the positive temperature coefficient thermistor has a higher resistance value at higher temperatures, and the negative temperature coefficient thermistor has a lower resistance value at higher temperatures, and generally, the resistance value is linear with the temperature. Based on the current temperature, the temperature sensor 1222 generates a corresponding resistance value, and when a current flows through the temperature sensor 1222, a corresponding electrical signal (i.e., voltage) is generated, which reflects the current temperature.

The electronic signal is transmitted to the interface conversion system 1221, the interface conversion system 1221 reads the corresponding driving waveform from the lookup table in the memory 1224 based on all the data, and the interface conversion system 1221 controls the driver 1231 to drive the electronic paper display panel 1230 according to the driving waveform.

The mode setter 1223 provides a mode setting signal to the interface conversion system 1221 according to the data type of the picture data to be displayed, where the mode setting signal includes refresh modes such as a2, DU, GC, GU, GL, and GLR.

In more detail, the driver 1231 responds to the driving waveform to apply appropriate voltages to the bottom thin-film electrode 1030 so as to control the

electrophoretic particles

1044 and 1046 to move towards or away from the top transparent electrode 1010 in the electrophoretic solution 1042, so as to perform the black-and-white refresh mode, the full-screen refresh mode or the partial refresh mode.

According to the above description, the local refreshing speed is ideal and does not affect reading, and the defects are that after the screen is refreshed for several times, a hidden visible ghost can appear, the page refreshed through the full screen is very clean, and the defects are that the refreshing speed is slow and the screen flashing phenomenon exists. Therefore, the interface conversion system 1221 of this embodiment may be configured to use a partial refresh mode during reading, so that the page turning is faster, but the occurrence of the residual printing affects the full-screen refresh during reading. Specifically, the interface conversion system 1221 may be configured to automatically perform a full-screen refresh operation after a number of partial refreshes, for example: and executing full-screen refreshing after local refreshing is carried out for 3 times, 5 times or 10 times so as to take the refreshing speed into consideration and solve the problem of ghost shadow.

The scheme of the invention effectively executes the display driving mechanism of the electronic ink screen by integrating all parts, improves the display quality and reduces the complexity of circuit design.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An electronic paper display device, comprising:

an electronic paper display panel comprising: the electrophoretic display device comprises a top layer transparent electrode, an electrophoretic layer and a bottom layer thin film electrode, wherein the top layer transparent electrode and the bottom layer thin film electrode are used for applying voltage to two ends of the electrophoretic layer, the electrophoretic layer comprises a plurality of microcapsules, electrophoretic liquid and electrophoretic particles suspended in the electrophoretic liquid are contained in the microcapsules, and the electrophoretic particles move in the electrophoretic liquid towards or away from the top layer transparent electrode under the action of the voltage; and

a data processing system comprising:

the temperature sensor is used for acquiring temperature data;

the system-level chip is provided with an interface matched with the electronic paper display panel, the system-level chip is electrically connected with the electronic paper display panel through the interface, the system-level chip finds out the corresponding driving waveform in the lookup table according to the temperature data, converts picture data to be displayed into interface data and drives the electronic paper display panel to display;

and the electronic paper display panel receives the interface data through the interface.

2. An electronic paper display device, comprising:

an electronic paper display panel; and

a data processing system comprising:

the temperature sensor is used for acquiring temperature data on the electronic paper display panel; and

the system-level chip is provided with an interface matched with the electronic paper display panel, is electrically connected with the electronic paper display panel through the interface, is respectively electrically connected with the temperature sensor and the electronic paper display panel, and converts picture data to be displayed into interface data of the electronic paper display panel according to the temperature data so as to drive the electronic paper display panel to display;

3. The electronic paper display device of claim 2, wherein the interface is a DPI interface.

4. The electronic paper display device of claim 2, wherein the data processing system is further configured to:

obtaining a mode setting signal according to the data type of the picture data to be displayed, and converting the picture data to be displayed into the interface data according to the mode setting signal, wherein the mode setting signal comprises a gray scale refreshing signal and a black and white refreshing signal, the gray scale refreshing signal comprises a GC4 or GC16 gray scale refreshing signal, and the black and white refreshing signal provides black and white two-color display for the electronic paper display panel.

5. An electronic paper display device, comprising:

an electronic paper display panel comprising: the electronic paper display panel also comprises a plurality of scanning lines, a plurality of data lines and a plurality of thin film transistors, wherein the staggered position of the scanning lines and the data lines is connected with one of the thin film transistors, and the thin film transistors are connected to the bottom thin film electrode; and

the system-level chip is provided with an interface matched with the electronic paper display panel, the system-level chip is electrically connected with the electronic paper display panel through the interface, and the system-level chip finds out a corresponding driving waveform from the lookup table according to the electronic signal;

6. The electronic paper display device of claim 5, further comprising a driver connected to the scan lines and the data lines for respectively outputting signals to the scan lines and the data lines to control the thin film transistors.

7. An electronic paper display device, comprising:

the data processing system is used for outputting picture data to be displayed;

the temperature sensor is used for acquiring temperature data;

8. The electronic-paper display device according to claim 7, wherein the data processing system is provided with an MIPI interface, the electronic-paper display panel is provided with a DPI interface, and the interface conversion system is configured to convert the picture data to be displayed output by the MIPI interface into DPI interface data.

9. An electronic paper display device, comprising:

the data processing system outputs picture data to be displayed;

10. The electronic-paper display device according to claim 9, wherein the data processing system is provided with an MIPI interface, the electronic-paper display panel is provided with a DPI interface, and the interface conversion system is configured to convert the picture data to be displayed output by the MIPI interface into DPI interface data.