CN112309337B - Electronic paper device and driving method thereof - Google Patents

Abstract

The application discloses an electronic paper device and a driving method thereof. The electronic paper device comprises a driving substrate and an electronic paper film. The driving substrate comprises a plurality of pixel areas, a plurality of scanning lines and a plurality of data lines. Each pixel region is provided with a first pixel electrode, a second pixel electrode and a control circuit, wherein the first pixel electrode is provided with a first side edge and a second side edge connected with the first side edge, the second pixel electrode is adjacently arranged on the first side edge and the second side edge, and the first pixel electrode is electrically connected with the second pixel electrode through the control circuit. Each scanning line is electrically connected with the first pixel electrode of the whole row. Each data line is electrically connected with the first pixel electrode of the whole row. The electronic paper film is arranged on the driving substrate.

Description

Electronic paper device and driving method thereof

technical field

The invention relates to a device and a driving method thereof, in particular to a bistable electronic paper device and a driving method thereof.

Background technique

With the progress of science and technology, the display device as the communication interface between human and machine is also continuously improved, and is developing in a diversified direction to meet the needs of human beings. Among them, liquid crystal display devices have replaced cold cathode ray tube display devices and are widely used in various electronic products due to their advantages such as low power consumption, low heat generation, light weight, and non-radiation, such as : home TV, notebook computer and desktop screen, etc.

However, both the cold cathode ray tube display device and the liquid crystal display device still have the disadvantage of needing to continuously supply power, that is, the display device still consumes power while displaying images. Therefore, a bi-stable electronic paper display device is born accordingly. When the bistable electronic paper device displays an image or screen, no additional power input is required, and the image or screen will always be retained, and only when it changes to another state or display screen does it need to input additional power. A feature of low power consumption and storability has become the first choice for the next generation of display devices.

However, the display medium of the electronic paper device has different characteristics as the temperature changes. For example, when the temperature is high (for example, over 30°C), the display medium is easier to be driven. However, because the transverse electric field between two adjacent pixels will cause the imaging blur between the pixels, the displayed text, image, etc. In addition, when the temperature is low (for example, lower than 15° C. or 10° C.), the display medium is less likely to be driven, and it is easy to cause the problem of a line between two adjacent pixels.

Contents of the invention

In view of the above problems, the object of the present invention is to provide an electronic paper device and its driving method, which can solve the problem of imaging blur between two adjacent pixels at high temperature and the problem of line separation at low temperature.

To achieve the above purpose, an electronic paper device according to the present invention includes a driving substrate and an electronic paper film. The driving substrate includes a plurality of pixel areas, a plurality of scanning lines and a plurality of data lines. These pixel regions are arranged in a matrix of rows and columns, each pixel region has a first pixel electrode, a second pixel electrode and a control circuit, the first pixel electrode has a first side and a second side connected to the first side, The second pixel electrode is adjacent to the first side and the second side, and the first pixel electrode is electrically connected to the second pixel electrode through the control circuit. Each scan line is electrically connected to the first pixel electrodes of the entire row. The data lines and the scan lines are arranged alternately, and each data line is electrically connected to the first pixel electrodes of the entire column. The electronic paper film is arranged on the driving substrate.

In order to achieve the above object, according to a driving method of an electronic paper device of the present invention, the electronic paper device includes a driving substrate and an electronic paper film, the electronic paper film is arranged on the driving substrate, and the driving substrate includes a plurality of pixel areas and a plurality of scanning lines and a plurality of data lines, these pixel areas are arranged in a matrix of rows and columns, each pixel area has a first pixel electrode, a second pixel electrode and a control circuit, the first pixel electrode has a first side and is connected to the first side The second side of the second pixel electrode is adjacent to the first side and the second side, and the first pixel electrode is electrically connected to the second pixel electrode through the control circuit. The pixel electrodes are electrically connected, the data lines are arranged alternately with the scan lines, and each data line is electrically connected to the first pixel electrodes in the entire column. The driving method includes: controlling these control circuits, so that the first pixels in each pixel area The electrodes are connected or not connected to the second pixel electrodes; the scanning signals are sequentially transmitted to the pixel regions through the scanning lines; and the data signals are transmitted to the first pixel electrodes of the pixel regions through the data lines.

In one embodiment, each pixel region further has a first switch, the first end of the first switch is connected to one of the data lines, the second end of the first switch is connected to the first pixel electrode and the control circuit, and the first switch Connect the control terminal to one of these scan lines.

In one embodiment, the electronic paper device further includes: a control line, each control circuit includes a second switch, the first end of the second switch is connected to the first pixel electrode, the second end of the second switch is connected to the second pixel electrode, The control terminal of the second switch is connected with the control line.

In one embodiment, the driving method further includes: transmitting an on-signal or an off-signal to a control terminal of the second switch through a control line, so as to turn on or off the second switch.

In one embodiment, the control lines are connected to the control ends of the second switches in all pixel regions.

In one embodiment, the on-signal or the off-signal is transmitted to the control terminal of the second switch through the control line, so as to turn on or off the second switch.

In one embodiment, the turn-on signal or the turn-off signal is sent to the control terminal of the second switch according to the temperature value.

In one embodiment, at the first temperature, the conduction signal is transmitted to the control end of the second switch through the control line, so that the first pixel electrode and the second pixel electrode are connected to have the same voltage; at the second temperature, The cut-off signal is transmitted to the control end of the second switch through the control line, so that the first pixel electrode is not connected to the second pixel electrode, and then the second pixel electrode is floating, thereby increasing the distance between pixels, wherein the first temperature is low at the second temperature.

In one embodiment, the control circuit is controlled according to the frame update rate, so that the control circuit is turned on or off.

In one embodiment, at the first frame refresh rate, the control circuit is turned on, so that the first pixel electrode and the second pixel electrode are connected to have the same voltage; at the second frame refresh rate, the control circuit is not turned on, The first pixel electrode is disconnected from the second pixel electrode, and the second pixel electrode is floated, thereby increasing the distance between pixels, wherein the first frame refresh rate is lower than the second frame refresh rate.

In one embodiment, the first pixel electrode further has a third side, the third side is connected to the second side, and the second pixel electrode is further adjacent to the third side.

In one embodiment, the electronic paper film includes a display medium, and the display medium is an electrophoretic substance or a cholesteric liquid crystal, or other bistable substances.

As mentioned above, in the electronic paper device and its driving method of the present invention, by making the second pixel electrode of each pixel area adjacent to the first side and the second side of the first pixel electrode, and the first pixel The configuration and design of the electrode being electrically connected to the second pixel electrode through the control circuit can solve the problem of image blur between two adjacent pixels when the electronic paper device is in a high temperature environment and the line separation problem in a low temperature environment.

Description of drawings

FIG. 1A is a schematic diagram of an electronic paper device according to an embodiment of the present invention.

FIG. 1B is a schematic diagram of an electronic paper film of the electronic paper device in FIG. 1A .

FIG. 2 is a schematic circuit diagram of the electronic paper device in FIG. 1A .

3A and 3B are schematic diagrams of pixel electrode configurations of the electronic paper device shown in FIG. 1A , respectively.

FIG. 4 is a schematic diagram of a driving sequence of the electronic paper device in FIG. 1A .

FIG. 5 is another schematic circuit diagram of the electronic paper device of the present invention.

FIG. 6 is a schematic circuit diagram of an electronic paper device according to another embodiment of the present invention.

FIG. 7 is a schematic diagram of another pixel electrode configuration of the electronic paper device of the present invention.

FIG. 8 is another schematic diagram of the electronic paper device of the present invention.

Detailed ways

The electronic paper device and its driving method according to some embodiments of the present invention will be described below with reference to related drawings, wherein the same elements will be described with the same reference numerals.

FIG. 1A is a schematic diagram of an electronic paper device according to an embodiment of the present invention, FIG. 1B is a schematic diagram of an electronic paper film of the electronic paper device in FIG. 1A , FIG. 2 is a schematic circuit diagram of the electronic paper device in FIG. 1A , and FIG. 3A and FIG. 3B is a schematic diagram of pixel electrode configurations of the electronic paper device shown in FIG. 1A .

As shown in FIGS. 1A to 3A , the electronic paper device 1 includes a driving substrate 2 and an electronic paper film 3 .

The driving substrate 2 includes a plurality of pixel regions 21 , a plurality of scan lines G1 - Gn (only G1 - G4 are shown in FIG. 2 ), and a plurality of data lines D1 - Dm (only D1 - D4 are shown in FIG. 2 ). The pixel areas 21 , the scan lines G1 -Gn and the data lines D1 -Dm are disposed on the substrate body 20 ( FIG. 1A ). Wherein, a plurality of pixel regions 21 are arranged in a matrix of rows and columns, and a plurality of data lines D1 ˜ Dm and a plurality of scan lines G1 ˜ Gn are interlaced to define the pixel regions 21 . Wherein, each pixel area 21 can have at least one switch, such as a thin film transistor (TFT), so that the driving substrate 2 forms an active matrix (Active Matrix) driven TFT substrate to drive and control the electric field of each pixel area 21. formed or not. In addition, the substrate body 20 can change the form of the substrate according to product requirements. It can be a glass substrate, a plastic substrate, or a flexible substrate, and the material of the flexible substrate is, for example but not limited to, polyimide (PI).

Please refer to FIG. 1A and FIG. 1B at the same time, the electronic paper film 3 is disposed on the driving substrate 2, for example, the electronic paper film 3 can be bonded to the upper surface of the driving substrate 2 by using an adhesive G, and is in contact with the pixel area 21. . The electronic paper film 3 is a bistable display device, so it has the advantages of power saving and wide viewing angle. It can be roughly divided into microcapsule (Microcapsule) type electronic paper, microcup (Microcup) type electronic paper, or cholesteric liquid crystal ( Cholesteric Liquid Crystal) electronic paper, etc., but not limited thereto. When the electronic paper film 3 is microcapsule or microcup electronic paper, its display medium can be electrophoretic substances; when the electronic paper film 3 is cholesteric liquid crystal electronic paper, its display medium can be cholesteric liquid crystal molecules. When the electronic paper film 3 is another type of bistable display, its display medium can be other types of bistable substances, and the application does not limit the type of bistable substances.

The embodiment of FIG. 1B is illustrated by taking the microcapsule-type electronic paper film 3 as an example. The electronic paper film 3 includes a first substrate (lower substrate) 31, a second substrate (upper substrate) 32 opposite to the first substrate 31, a counter electrode 33, and an electrode disposed between the first substrate 31 and the second substrate 32. Electrophoretic substance E. Wherein, the opposite electrode 33 is formed entirely on the surface of the second substrate 32 facing the electrophoretic substance E, so as to form an electric field together with the pixel electrodes of the pixel region 21 formed on the driving substrate 2 to drive the display medium (electrophoretic substance E). E). Among them, the electrophoretic substance E may include a plurality of charged light-colored pigment particles C and a dark medium solution L, and the pigment particles C and the medium solution L are respectively accommodated in a plurality of microcapsules E1, and between the microcapsules E1 Adhesives can be used to join together. The content of the electrophoretic substance E may also be a combination of dark-colored pigment particles and light-colored medium solution, which is not limited.

The manufacturing process of the electronic paper film 3 can also be integrated with the driving substrate 2, that is, the driving substrate 2 is directly used as the first substrate 31 of the electronic paper film 3, and the electrophoretic substance E is sealed on the second substrate 32 of the electronic paper film 3 and Between the driving substrates 2 , in this way, the material cost of the first substrate 31 can be reduced.

In addition, as shown in FIG. 2 , the electronic paper device 1 may further include a scan driver 11 and a data driver 12. The scan driver 11 is electrically connected to the pixel areas 21 of the driving substrate 2 through the scan lines G1-Gn, and the data driver 12 The pixel regions 21 of the driving substrate 2 can be electrically connected through the data lines D1 ˜Dm. When the scan driver 11 sequentially turns on the scan lines G1-Gn according to the vertical clock pulse signal (Clock Pulse Vertical, CPV) and the vertical synchronizing signal (Vertical Synchronizing Signal), the data driver 12 can transmit the data voltage signal corresponding to each column of the pixel area 21 , through the data lines D1~Dm to the pixel electrodes in the pixel area 21, so that the pixel electrodes in the pixel area 21 and the counter electrode 33 of the electronic paper film 3 can generate an electric field, so that the charged pigment particles C in the electronic paper film 3 can be Move in medium solution L. When external light passes through the second substrate 32 and enters the electronic paper film 3, it is reflected by the light-colored charged pigment particles C, so that the human eye can see the light-colored charged pigment particles in the background of the dark-colored medium solution L. The light reflected by the pigment particles C forms a display device.

As shown in FIG. 2 and FIG. 3A, each pixel area 21 has a first pixel electrode 211, a second pixel electrode 212, and a control circuit 213, and each scanning line G1-Gn is connected to a plurality of first pixel electrodes in a whole row (horizontal direction). The pixel electrodes 211 are electrically connected, and each of the data lines D1 ˜ Dm is electrically connected to a plurality of first pixel electrodes 211 in an entire column (vertical direction). As shown in FIG. 3A, the first pixel electrode 211 of each pixel region 21 has a first side S1 and a second side S2 connected to the first side S1, and the second pixel electrode 212 is adjacent to the first side. S1 and the second side S2 , and the first pixel electrode 211 can be electrically connected to the second pixel electrode 212 through the control circuit 213 . Specifically, each pixel region 21 of this embodiment includes two pixel electrodes: the first pixel electrode 211 and the second pixel electrode 212. The spatial configuration of the first pixel electrode 211 is roughly a quadrilateral, which has a similar shape. The four sides connected, but the actual configuration of pixels can be any shape, which is not limited here.

The aforementioned four connected sides are the first side S1, the second side S2, the third side and the fourth side (the third side and the fourth side are not marked in FIG. 3A ), and the second pixel The electrode 212 surrounds the first side S1 and the second side S2 of the first pixel electrode 211 . In this embodiment, the second pixel electrode 212 is roughly arranged in an inverted 7 shape in space, and it is adjacent to the first side S1 and the second side S2 connected to the first pixel electrode 211, and both They can be (electrically) connected together through the control circuit 213 . The material of the first pixel electrode 211 and the second pixel electrode 212 can be a transparent or opaque conductive material, such as but not limited to indium tin oxide (ITO) or indium zinc oxide ( indium zinc oxide, IZO), or other transparent conductive materials, and opaque conductive materials such as metals or alloys.

Please refer to FIG. 2 again, each pixel region 21 of this embodiment further has a first switch T1, the first end of the first switch T1 is connected to one of the data lines D1˜Dm, and the first end of the first switch T1 Two terminals are connected to the first pixel electrode 211 and the control circuit 213 , and the control terminal of the first switch T1 is connected to one of the scanning lines G1 -Gn. In addition, the electronic paper device 1 of this embodiment may further include at least one control line Gc, and each control circuit 213 may include a second switch T2, the first end of the second switch T2 is connected to the first pixel electrode of the pixel area 21 211 , the second terminal of the second switch T2 is connected to the second pixel electrode 212 of the pixel region 21 , and the control terminal of the second switch T2 is connected to the control line Gc. Here, the control circuit 213 including the second switch T2 is just an example, and in different embodiments, the control circuit 213 may have different elements or circuits.

One control line Gc in this embodiment is taken as an example, and is connected to the scan driver 11 . Here, the circuit for controlling the turn-on or turn-off of each control circuit 213 (the second switch T2) is integrated in the scan driver 11, so that the scan driver 11 can output the turn-on signal or turn-off signal and send it to all the control circuits through the control line Gc. The control terminal of the circuit 213 (the second switch T2 ) turns on or off the second switches T2 of all the pixel regions 21 . In different embodiments, the circuit for controlling the turn-on or turn-off of the second switch T2 may also be independent from the scan driver 11 , and is not limited thereto. The first switch T1 and the second switch T2 can be thin film transistors (such as P-type), and are formed on the substrate body 20 .

In addition, in this embodiment, one control line Gc is used to connect the control terminals of the second switches T2 of all pixel regions 21 to control the second switch T2 to be turned on or off, but this is not limited to this, in different embodiments , please refer to FIG. 5 , which is another schematic circuit diagram of the electronic paper device of the present invention. In the electronic paper device 1a shown in FIG. 5 , the number of control lines Gc1 to Gcn (only Gc1 to Gc4 are marked in FIG. 5 ) connected to the control circuit 213 may be the same as the number of scanning lines G1 to Gn, and the control lines Gc1 to Gcn are respectively It is connected to the control terminals of the plurality of second switches T2 corresponding to a whole row of pixel regions 21, so as to control the plurality of second switches T2 of the corresponding row through the plurality of control lines Gc1-Gcn.

Please refer to FIG. 2 and FIG. 3A together with FIG. 4 , wherein FIG. 4 is a schematic diagram of a driving sequence of the electronic paper device in FIG. 1A .

In this embodiment, the scan driver 11 transmits a turn-on signal or a turn-off signal to each control circuit 213 (second switch T2) according to the temperature value, so as to turn on the control circuit 213 (second switch T2), or make the control circuit 213 (the second switch T2) is not turned on. Specifically, the scan driver 11 can transmit appropriate control signals to the control circuit 213 (the second switch T2 ) depending on the place of use. For example, in a department store, low-temperature places such as refrigerators or freezers for fresh and vegetable storage, the temperature of which is lower than 15°C (inclusive), and high-temperature places such as areas where general daily necessities are placed or A warehouse, the temperature of which is, for example, higher than 25°C or higher than 30°C. The temperature value here is just an example, and the user can apply or adjust it according to the different places and the characteristics of the electronic paper device 1 .

As shown in FIG. 2 and FIG. 4 , at the first temperature (low temperature), before the scan driver 11 starts to output the scan signal to each scan line G1-Gn, the scan driver 11 of this embodiment can first output the conduction signal and pass The control line Gc is transmitted to the control ends of the second switches T2 of all the pixel regions 21 to turn on the second switches T2, so that the first pixel electrode 211 and the second pixel electrode 212 of each pixel region 21 are connected to make both have the same voltage. Wherein, the second switch T2 is kept in the conduction state during the whole frame time (Frame time). Afterwards, the scan driver 11 sequentially transmits the scan signal to each scan line G1-Gn, so that the first switch T1 can be turned on, and the data driver 12 can pass the data voltage corresponding to each data line D1-Dm through each data line D1 ˜Dm and the first switch T1 are transmitted to the corresponding first pixel electrode 211 . Since the second switch T2 is turned on, the data voltage transmitted to the first pixel electrode 211 can be transmitted to the second pixel electrode 212 through the second switch T2, so that the first pixel electrode 211 and the second pixel electrode 212 have the same data voltage.

As shown in FIG. 3A, when the first pixel electrode 211 and the second pixel electrode 212 of each pixel region 21 are connected to have the same data voltage, the size of the pixel electrode that will generate an electric field with the counter electrode 33 in each pixel region 21 (That is, the sum of the areas of the first pixel electrode 211 and the second pixel electrode 212) is larger than the conventional one, so that the gap d1 in the row direction or the gap d2 in the column direction is smaller than the conventional one ( That is, the distance between the pixel and the pixel becomes smaller), therefore, the electric field generated between the pixel electrode of the pixel region 21 and the counter electrode 33 is easier to drive the charged pigment particles C, thereby, when the low temperature environment can be solved, the two Low-temperature separation line problem between adjacent pixels.

In addition, at the second temperature (high temperature, the first temperature is lower than the second temperature), before the scan driver 11 starts to output the scan signal to each scan line G1-Gn, the scan driver 11 can output a cut-off signal and transmit it to The control terminal of the second switch T2 makes the second switch T2 non-conductive, so that the first pixel electrode 211 and the second pixel electrode 212 are not connected, and then the second pixel electrode 212 is floating, thereby increasing the distance between pixels . Here, when the control circuit 213 is not turned on (off), the data voltage transmitted to the first pixel electrode 211 will not be transmitted to the second pixel electrode 212. At this time, as shown in FIG. The pixel electrode 211 has a data voltage, and the pixel electrode size (that is, the area of the first pixel electrode 211) that can generate an electric field with the counter electrode 33 in each pixel region 21 is relatively small compared with the conventional one, so that no matter in the row direction Both the gap d3 and the gap d4 in the column direction are larger than conventional ones (that is, the distance between pixels becomes larger), so the lateral electric field between two adjacent pixel regions 21 will not affect (disturb) the charged The movement of the pigment particle C can thereby solve the imaging blur problem caused by the transverse electric field between two adjacent pixels in a high-temperature environment.

In some embodiments, the circuit controlling the second switch T2 (the control circuit 213 ) can transmit an on-signal or an off-signal to the second switch T2 of each pixel region 21 through manual or automatic control. In terms of automatic control, when the electronic paper device 1 displays product information when it is applied in a low-temperature environment (refrigerator or freezer) such as a store, the temperature sensor can be used to automatically detect the ambient temperature of the location, so that the control second The circuit of the switch T2 (control circuit 213) can automatically transmit the conduction signal to each pixel area 21; when it is applied to a higher temperature environment such as a store (such as an area or a warehouse where general daily necessities are placed), it can also pass the temperature. The sensor automatically detects the ambient temperature, and the circuit that controls the second switch T2 (control circuit 213 ) to be turned on or off can automatically transmit a turn-off signal to each pixel area 21 for application in different working environments. Of course, the user can also manually switch the mode to control whether the control circuit 213 is turned on or not.

The control circuit of each pixel region 21 may also have different forms, so as to control the on or off of the control circuit in different ways. For example, the control circuit can be controlled according to the frame refresh rate to make the control circuit conduction or non-conduction. Specifically, the control circuit may include, for example, a timer (Timer), which may include an RC circuit, and uses the frame rate (frame rate, that is, the frequency of display screen updates per second) of the electronic paper device for automatic control. When in a low-temperature environment, the screen update rate of the electronic paper device can be switched to a lower first screen update rate; when in a high-temperature environment, the screen update rate of the electronic paper device can be switched to a higher second screen update rate rate, and the first frame update rate is lower than the second pixel update rate.

Please refer to FIG. 6 , which is a schematic circuit diagram of an electronic paper device 1b according to another embodiment of the present invention. In this embodiment, at the first frame refresh rate, the control circuit 213b of the electronic paper device 1b is turned on, so that the first pixel electrode 211 and the second pixel electrode 212 are connected to have the same voltage. Specifically, assuming that under normal circumstances, the screen update rate of the electronic paper device 1b is 60 Hz, a lower screen update rate (for example, 30 Hz) can be used in a low-temperature environment, and a low screen update rate means that each scanning line G1- The conduction time of Gn is relatively long, and within this relatively long conduction time, the timer has been activated to conduct the control circuit 213b, so that the first pixel electrode 211 and the first pixel electrode 211 are electrically connected together, and then the second The data voltage of a pixel electrode 211 can be transmitted to the second pixel electrode 212 so that the first pixel electrode 211 and the second pixel electrode 212 have the same data voltage. In this way, the problem of the low-temperature separation line between two adjacent pixels can also be solved.

In addition, at the second frame refresh rate, the control circuit 213b is turned off and not turned on, so that the first pixel electrode 211 and the second pixel electrode 212 are not connected, and the second pixel electrode 212 is floating, thereby increasing the number of pixels and pixels. Pitch. Specifically, when in a high-temperature environment, a higher frame update rate (for example, 100 Hz) is used. A high frame rate means that the conduction time of each scanning line G1-Gn is shorter. , the timer will not operate, so that the control circuit 213b is not turned on so that the first pixel electrode 211 is not connected to the first pixel electrode 211, and the data voltage of the first pixel electrode 211 will not be transmitted to the second pixel electrode 212 ( Only the first pixel electrode 211 has the data voltage), so that the pixel-to-pixel distance can be increased, and therefore, the imaging blur problem caused by the lateral electric field between two adjacent pixels can also be solved in a high temperature environment. Of course, the aforementioned control method of using a lower frame rate in low-temperature environments and using a higher frame rate in high-temperature environments can also be changed and set by automatically detecting the ambient temperature through a temperature sensor, or manually by the user. Switch and set.

FIG. 7 is a schematic diagram of another pixel electrode configuration of the electronic paper device of the present invention. In the embodiment of FIG. 3A, the second pixel electrode 212 of the electronic paper device 1 is adjacent to the first side S1 and the second side S2 of the first pixel electrode 211. However, in the embodiment of FIG. The spatial configuration of the second pixel electrode 212c in each pixel area 21c of the paper device 1c is not only adjacent to the first side S1 and the second side S2 of the first pixel electrode 211c, but also the first pixel electrode 211c has a second Three sides S3, the third side S3 is connected to the second side S2, and the second pixel electrode 212c is adjacent to the first side S1, the second side S2 and the third side S3 (that is, the three sides All correspond to the connected second pixel electrodes 212c). In addition, in different embodiments, the first pixel electrode may further have a fourth side (not shown), the fourth side is connected to the third side, and the second pixel electrode may be adjacent to the first pixel electrode. The first side, the second side, the third side and the fourth side, that is, the four sides of the first pixel electrode are surrounded by the second pixel electrode, which is not limited in the present invention.

FIG. 8 is another schematic diagram of the electronic paper device of the present invention. The main difference between the electronic paper device 1d in FIG. 8 and the above-mentioned electronic paper device is that the electronic paper device 1d in this embodiment can further include a transparent substrate 13 and a sealant 14, and the material of the transparent substrate 13 can be light-transmitting glass or Plastic, and set on the electronic paper film 3. The sealant 14 surrounds the transparent substrate 13 and the substrate body 20 , and is located between the transparent substrate 13 and the substrate body 20 . Here, the sealant 14 is used to bond the driving substrate 2 and the transparent substrate 13 to form a closed space S, and the electronic paper film 3 accommodates the closed space S to prevent moisture or foreign matter from entering and destroying its characteristics.

In addition, the present invention further provides a driving method for an electronic paper device, which is used in conjunction with one of the aforementioned electronic paper devices 1-1d. The technical content of the electronic paper devices 1-1d has been described in detail above, and here No further explanation.

As shown in FIG. 2 , taking the electronic paper device 1 as an example, its driving method may at least include the following steps: the first step: controlling these control circuits 213 to make the first pixel electrode 211 and the second pixel electrode 212 of each pixel area 21 connected or not connected, wherein the control circuit 213 is controlled according to the temperature value or the frame refresh rate, and the control circuit 213 is turned on or off, so that the first pixel electrode 211 of each pixel area 21 is connected to the second pixel electrode 212 or do not connect. The second step: sequentially transmit scan signals to these pixel areas 21 through the scan lines G1-Gn to turn on the first switch T1 of each pixel area 21; and transmit data signals to these pixels through the data lines D1-Dm These first pixel electrodes 211 of the region 21. Wherein, when the scan signal is transmitted to each scan line G1-Gn to turn on the first switch T1 of the pixel area 21, the corresponding data signal is transmitted to the first pixel electrodes of these pixel areas 21 through the data lines D1-Dm. 211.

In addition, other technical features of the driving method of the electronic paper device have been described in detail above, and the specific content can refer to the above content, and will not be repeated here.

To sum up, in the electronic paper device and its driving method of the present invention, by making the second pixel electrode of each pixel area adjacent to the first side and the second side of the first pixel electrode, and the first pixel The configuration and design of the electrode being electrically connected to the second pixel electrode through the control circuit can solve the problem of image blur between two adjacent pixels when the electronic paper device is in a high temperature environment and the line separation problem in a low temperature environment.

The above descriptions are illustrative only, not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of the appended patent application.

Claims (20)

1. An electronic paper device, comprising: Driver board, including: A plurality of pixel areas are arranged in a matrix of rows and columns, each of the pixel areas has a first pixel electrode, a second pixel electrode and a control circuit, and the first pixel electrode has a first side and is connected to the first side The second side is connected to the second side, the second pixel electrode is adjacent to the first side and the second side, and the first pixel electrode is connected to the second pixel electrode through the control circuit electrical connection; a plurality of scanning lines, each of which is electrically connected to the first pixel electrodes of the entire row; and A plurality of data lines are arranged alternately with the scanning lines, and each of the data lines is electrically connected to the first pixel electrodes of the entire column; and The electronic paper film is arranged on the driving substrate; Wherein, at the first temperature, the control circuit is turned on, so that the first pixel electrode and the second pixel electrode are connected to have the same voltage; at the second temperature, the control circuit is not turned on, disconnecting the first pixel electrode from the second pixel electrode, and then floating the second pixel electrode, wherein the first temperature is lower than the second temperature. 2. The electronic paper device according to claim 1, wherein each of the pixel areas further has a first switch, the first end of the first switch is connected to one of the data lines, and the first switch of the first switch The second terminal is connected to the first pixel electrode and the control circuit, and the control terminal of the first switch is connected to one of the scanning lines. 3. The electronic paper device according to claim 1, further comprising: Control lines, each of the control circuits includes a second switch, the first end of the second switch is connected to the first pixel electrode, the second end of the second switch is connected to the second pixel electrode, and the first end of the second switch is connected to the second pixel electrode. The control ends of the two switches are connected to the control line. 4. The electronic paper device according to claim 3, wherein the control line is connected to the control terminals of the second switches in all pixel areas. 5 . The electronic paper device according to claim 3 , wherein a turn-on signal or a turn-off signal is transmitted to a control terminal of the second switch through the control line to turn on or turn off the second switch. 5 . 6. The electronic paper device according to claim 5, wherein the on-signal or the off-signal is transmitted to the control terminal of the second switch according to a temperature value. 7. The electronic paper device according to claim 6, wherein, at the first temperature, the conduction signal is transmitted to the control end of the second switch through the control line, so that the first pixel The electrode is connected to the second pixel electrode and has the same voltage; at the second temperature, the cut-off signal is transmitted to the control terminal of the second switch through the control line, so that the first pixel electrode Not connected to the second pixel electrode, so that the second pixel electrode is floating. 8. The electronic paper device according to claim 1, wherein, at the first temperature, the electronic paper device has a first frame refresh rate; at the second temperature, the electronic paper device has a first frame refresh rate. Two picture update rate. 9. The electronic paper device according to claim 8, wherein, at the first frame refresh rate, the control circuit is turned on, so that the first pixel electrode is connected to the second pixel electrode to have the same voltage; at the time of the second frame refresh rate, the control circuit is not turned on, so that the first pixel electrode is not connected to the second pixel electrode, and then the second pixel electrode is floating, wherein The first frame update rate is lower than the second frame refresh rate. 10. The electronic paper device according to claim 1, wherein the first pixel electrode further has a third side, the third side is connected to the second side, and the second pixel electrode is more adjacent to located on the third side. 11. The electronic paper device according to claim 1, wherein the electronic paper film comprises a display medium, and the display medium is an electrophoretic substance or a cholesteric liquid crystal. 12. A method for driving an electronic paper device, the electronic paper device comprising a driving substrate and an electronic paper film, the electronic paper film being arranged on the driving substrate, the driving substrate comprising a plurality of pixel areas, a plurality of scanning lines line and a plurality of data lines, the pixel areas are arranged in a matrix of rows and columns, each of the pixel areas has a first pixel electrode, a second pixel electrode and a control circuit, and the first pixel electrode has a first side and a a second side connected to the first side, the second pixel electrode is adjacent to the first side and the second side, and the first pixel electrode is connected to the control circuit through the control circuit The second pixel electrodes are electrically connected, each of the scanning lines is electrically connected to the first pixel electrodes of the entire row, the data lines are arranged alternately with the scanning lines, and each of the data lines is connected to the entire row of the first pixel electrodes. The first pixel electrode is electrically connected, and the driving method includes: controlling the control circuit so that the first pixel electrode of each pixel region is connected to the second pixel electrode or not; wherein, at the first temperature, the control circuit is turned on to make the first pixel electrode A pixel electrode is connected to the second pixel electrode and has the same voltage; at the second temperature, the control circuit is not conducted, so that the first pixel electrode is not connected to the second pixel electrode, and thus the The second pixel electrode is floating, wherein the first temperature is lower than the second temperature; sequentially transmitting scan signals to the pixel regions through each of the scan lines; and A data signal is transmitted to the first pixel electrode in the pixel area through each of the data lines. 13. The driving method according to claim 12, wherein each of the pixel regions further has a first switch, the first end of the first switch is connected to one of the data lines, and the first end of the first switch is Two terminals are connected to the first pixel electrode and the control circuit, and the control terminal of the first switch is connected to one of the scanning lines. 14. The driving method according to claim 12, wherein the electronic paper device further includes a control line, each of the control circuits includes a second switch, the first end of the second switch is connected to the first pixel electrode, The second end of the second switch is connected to the second pixel electrode, the control end of the second switch is connected to the control line, and the driving method further includes: An on-signal or an off-signal is transmitted to the control end of the second switch through the control line to turn on or off the second switch. 15. The driving method according to claim 14, wherein the turn-on signal or the turn-off signal is sent to the control terminal of the second switch according to a temperature value. 16. The driving method according to claim 15, wherein, at the first temperature, the conduction signal is transmitted to the control terminal of the second switch through the control line, so that the first pixel electrode It is connected with the second pixel electrode to have the same voltage; at the second temperature, the cut-off signal is transmitted to the control terminal of the second switch through the control line, so that the first pixel electrode and The second pixel electrode is not connected, so that the second pixel electrode is floating. 17. The driving method according to claim 12, wherein, at the first temperature, the electronic paper device has a first frame refresh rate; at the second temperature, the electronic paper device has a second frame rate. frame rate. 18. The driving method according to claim 17, wherein at the first frame refresh rate, the control circuit is turned on so that the first pixel electrode and the second pixel electrode are connected to have the same voltage; when the second frame update rate is reached, the control circuit is turned off, so that the first pixel electrode is not connected to the second pixel electrode, and then the second pixel electrode is floating, and the first The frame refresh rate is lower than the second frame refresh rate. 19. The driving method according to claim 12, wherein the first pixel electrode further has a third side, the third side is connected to the second side, and the second pixel electrode is further adjacently arranged on said third side. 20. The driving method according to claim 12, wherein the electronic paper film comprises a display medium, and the display medium is an electrophoretic substance or a cholesteric liquid crystal.

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