Electronic paper display panel, touch positioning method and display device

Abstract

The invention relates to an electronic paper display panel, a touch positioning method and a display device.The electronic paper display panel comprises a pixel layer, the pixel layer comprises a plurality of first pixels and a plurality of second pixels, the first pixels are composed of at least one first electrophoresis unit, the first electrophoresis unit comprises color developing particles, and the second pixels are composed of at least one second electrophoresis unit; the first pixel is composed of at least one first electrophoresis unit, the color developing particles in the first electrophoresis unit in the first pixel are used for displaying image information, the second pixel is composed of at least one second electrophoresis unit, the second electrophoresis unit comprises the color developing particles, and the color developing particles in the second electrophoresis unit in the second pixel are used for displaying writing note information. The electronic paper display panel solves the problem that in the prior art, when a single pixel is used for displaying writing note information, image information originally displayed by the pixel can be covered by the writing note information.

Description

Technical Field

[0001] This application relates to the field of electronic paper display technology, and in particular to an electronic paper display panel, a touch positioning method, and a display device. Background Technology

[0002] Currently, in electronic paper display panels, a single pixel is used to display image information or handwritten notes at any given time. When a single pixel is used to display handwritten notes, the image information that the pixel was originally displaying will be covered by the handwritten notes. Summary of the Invention

[0003] This application provides an electronic paper display panel, a touch positioning method for the electronic paper display panel, and a display device to solve the problem in the prior art that when a single pixel is used to display handwritten notes, the image information originally displayed by that pixel will be covered by the handwritten notes.

[0004] In a first aspect, this application provides an electronic paper display panel, the electronic paper display panel comprising: a pixel layer, the pixel layer comprising a plurality of first pixels and a plurality of second pixels, the first pixel comprising at least one first electrophoretic unit, the first electrophoretic unit in the first pixel being used to display image information, the second pixel comprising at least one second electrophoretic unit, the second electrophoretic unit in the second pixel being used to display handwritten note information.

[0005] Optionally, the second pixel is positioned between two adjacent first pixels in a row of first pixels, and / or the second pixel is positioned between two adjacent first pixels in a column of first pixels.

[0006] Optionally, the second electrophoresis unit includes negatively charged color particles and positively charged black particles, wherein the mass of the color particles is greater than the mass of the black particles, and the charge of the color particles is less than the charge of the black particles. The electronic paper display panel further includes: a first electrode layer, comprising a plurality of first electrodes, each corresponding to a second pixel, the first electrodes being disposed directly above the top of the second electrophoresis unit in the corresponding second pixel; a second electrode layer, comprising a plurality of second electrodes, each corresponding to a second pixel, the second electrodes being disposed directly below the bottom of the second electrophoresis unit in the corresponding second pixel; and a triboelectric sensing layer, comprising a plurality of flexible transparent triboelectric transistors, the flexible transparent triboelectric transistors being connected to the first electrodes. In a one-to-one correspondence, the flexible light-transmitting triboelectric transistor is located directly above the corresponding first electrode, and the output terminal of the flexible light-transmitting triboelectric transistor is connected to the first electrode corresponding to the flexible light-transmitting triboelectric transistor. When the second pixel is in a non-writing, non-touch mode, the input terminal of the flexible light-transmitting triboelectric transistor corresponding to the second pixel is used to receive a first negative current signal, causing the output terminal of the flexible light-transmitting triboelectric transistor to output a second negative current signal to the first electrode corresponding to the second pixel. The second electrode corresponding to the second pixel is used to receive a first positive current signal, thereby driving the black particles in each second electrophoretic unit of the second pixel to move to the top of the second electrophoretic unit and driving the color-developing particles in each second electrophoretic unit of the second pixel to move to the bottom of the second electrophoretic unit.

[0007] Optionally, when the second pixel is in the writing preparation mode, the input terminal of the flexible light-transmitting triboelectric transistor corresponding to the second pixel is used to receive a second positive current signal, and the movable friction part of the flexible light-transmitting triboelectric transistor corresponding to the second electrophoresis unit is not moved, so that the output terminal of the flexible light-transmitting triboelectric transistor outputs a zero current signal to the first electrode corresponding to the second pixel, and the second electrode corresponding to the second pixel is used to receive a third negative current signal to drive the black particles in each second electrophoresis unit in the second pixel to move to the bottom of the second electrophoresis unit, and keep the color particles in each second electrophoresis unit in the second pixel at the bottom of the second electrophoresis unit, and the absolute value of the third negative current signal is less than the absolute value of the second negative current signal; when the second pixel is in the writing mode, the movable friction part of the flexible light-transmitting triboelectric transistor corresponding to the second pixel is used to move a first displacement value, so that the output terminal of the flexible light-transmitting triboelectric transistor outputs the first positive current signal to the first electrode, so as to drive the color particles in each second electrophoresis unit in the second pixel to move to the top of the second electrophoresis unit.

[0008] Optionally, the pixel layer further includes: a plurality of third electrodes and a plurality of fourth electrodes, wherein each third electrode corresponds to a second electrophoretic unit and is disposed on the outer side of the first segment of the first sidewall of the corresponding second electrophoretic unit; each fourth electrode corresponds to a second electrophoretic unit and is disposed on the outer side of the second segment of the second sidewall of the corresponding second electrophoretic unit; both the first segment and the second segment are close to the bottom of the second electrophoretic unit; wherein, when a second pixel is in the ready-to-write mode, the third electrode corresponding to each second electrophoretic unit in the second pixel is used to receive a third positive current signal, and the fourth electrode corresponding to each second electrophoretic unit in the second pixel is used to receive the third positive current signal, so as to drive the color-developing particles in each second electrophoretic unit in the second pixel to move to the first segment of the first sidewall of the second electrophoretic unit and the second segment of the second sidewall of the second electrophoretic unit, wherein the third positive current signal is less than the first positive current signal.

[0009] Optionally, when the second pixel is in the non-writing and non-touch mode, the third electrode corresponding to each second electrophoretic unit in the second pixel is used to receive a zero-current signal, and the fourth electrode corresponding to each second electrophoretic unit in the second pixel is used to receive the zero-current signal.

[0010] Optionally, when the second pixel is in touch mode, the rubble-movable part of the flexible light-transmitting triboelectric transistor corresponding to the second pixel is used to move a second displacement value, so that the output terminal of the flexible light-transmitting triboelectric transistor outputs a third negative current signal to the first electrode, and the absolute value of the third negative current signal is greater than the absolute value of the second negative current signal.

[0011] Optionally, when the second pixel is in the ready-to-touch mode, the third electrode corresponding to each second electrophoretic unit of the second pixel is used to receive the third positive current signal, and the fourth electrode corresponding to each second electrophoretic unit of the second pixel is used to receive the third positive current signal.

[0012] Secondly, this application provides a touch positioning method for an electronic paper display panel, wherein the electronic paper display panel is divided into multiple regions, each region corresponding to a plurality of second pixels, and the second pixels are located in their corresponding regions. The method includes: acquiring current signals in first electrodes corresponding to the plurality of second pixels; determining a touch region based on the current signals of the first electrodes corresponding to the plurality of second pixels, wherein the touch region is composed of at least one region corresponding to a second pixel, and the absolute value of the current signal of the first electrode corresponding to the second pixel in the touch region is greater than the absolute value of a second negative current signal, wherein the second negative current signal is the current signal in the first electrode corresponding to the second pixel when the second pixel is in a ready-to-touch mode.

[0013] Thirdly, this application provides a display device, the display device comprising: any of the electronic paper display panels described above; a driving substrate, the driving substrate being connected to a plurality of first electrodes in the display panel via a plurality of first traces, the driving substrate being connected to a plurality of second electrodes in the display panel via a plurality of second traces, the driving substrate being connected to a plurality of third electrodes in the display panel via a plurality of third traces, the driving substrate being connected to a plurality of fourth electrodes in the display panel via a plurality of fourth traces, and the driving substrate being connected to the input terminals of a plurality of flexible light-transmitting triboelectric transistors in the display panel via a plurality of fifth traces.

[0014] In this embodiment, the pixel layer of the electronic paper display panel is divided into a first pixel and a second pixel. The first pixel is used to display image information alone, and the second pixel is used to display handwritten notes information alone, without interfering with each other. This solves the problem in the prior art where the image information originally displayed by a single pixel is covered by the handwritten notes information when the pixel is used to display handwritten notes information. Attached Figure Description The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a schematic diagram of the structure of a flexible, light-transmitting triboelectric transistor in the prior art. Figure 2 This is a schematic diagram of the structure of an electronic paper display panel provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of an electronic paper display panel provided in an embodiment of this application when the second pixel is a black and white pixel; Figure 4 This is a schematic diagram of the structure of an electronic paper display panel provided in an embodiment of this application when the second pixel is a color pixel; Figure 5(a) is a schematic diagram of the structure of the first type of electronic paper display panel provided in the embodiment of this application, where the second pixel is in a non-writing and non-touch mode; Figure 5(b) is a schematic diagram of the structure of the first type of electronic paper display panel with the second pixel in the ready-to-write mode according to an embodiment of this application; Figure 5(c) is a schematic diagram of the structure of the first type of electronic paper display panel with the second pixel in writing mode according to an embodiment of this application; Figure 5(d) is a schematic diagram of the structure of a second type of electronic paper display panel with the second pixel in the ready-to-write mode according to an embodiment of this application; Figure 5(e) is a schematic diagram of the structure of a second type of electronic paper display panel with the second pixel in writing mode according to an embodiment of this application; Figure 5(f) is a schematic diagram of the structure of a second type of electronic paper display panel provided in an embodiment of this application, where the second pixel is in a non-writing and non-touch mode; Figure 6(a) is a schematic diagram of the structure of an electronic paper display panel with the second pixel in the ready-to-touch mode according to an embodiment of this application; Figure 6(b) is a schematic diagram of the structure of an electronic paper display panel with the second pixel in touch mode according to an embodiment of this application; Figure 7 A flowchart illustrating the touch positioning method for an electronic paper display panel provided in an embodiment of this application; The icon numbers in the instruction manual are explained as follows: 10. First pixel; 11. Red sub-pixel; 12. Green sub-pixel; 13. Blue sub-pixel; 20. Second pixel; 21. Second electrophoretic unit; 30. First electrode; 31. Second electrode; 32. Third electrode; 33. Fourth electrode; 40. Flexible substrate; 41. Gate; 42. Gate insulating layer; 43. Semiconductor layer; 44. Source electrode; 45. Fifth electrode; 46. Sixth electrode; 47. Flexible substrate; 48. Friction layer. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0020] The terms used in this application are explained below.

[0021] Flexible transparent triboelectric transistor: The structure and working principle of the flexible transparent triboelectric transistor are as follows.

[0022] Structure of flexible transparent triboelectric transistors: such as Figure 1As shown, the flexible transparent triboelectric transistor includes: a flexible substrate 40, a thin-film transistor, and a triboelectric generator. The thin-film transistor includes: a gate 41 formed on the flexible substrate 40; a gate insulating layer 42 formed on the gate 41; a semiconductor layer 43 formed on the gate insulating layer 42; a source 44 and a drain. The source 44 and drain are formed on opposite sides of the semiconductor layer 43 and form an ohmic contact with the semiconductor layer 43. A conductive channel with a width of 60 μm is formed in the semiconductor layer 43 between the source 44 and the drain. The triboelectric generator includes: A fifth electrode 45 and a sixth electrode 46 are arranged side-by-side, along with a movable friction part. The fifth electrode 45 and the sixth electrode 46 are formed on a flexible substrate 40 and are insulated from each other. The movable friction part is opposite to the fifth electrode 45 and the sixth electrode 46 and includes a flexible substrate 47 and a friction layer 48. The fifth electrode 45 is connected to the source 44 or the drain of the thin-film transistor, and the sixth electrode 46 is connected to the gate 41 of the thin-film transistor. The gate 41, the gate insulating layer 42, the semiconductor layer 43, the source 44, and the drain are all made of thin-film materials. Figure 1 In this configuration, since the fifth electrode 45 is connected to the source 44 of the thin-film transistor, the input terminal of the flexible transparent triboelectric transistor is the source 44, and the output terminal of the flexible transparent triboelectric transistor is the drain. If the fifth electrode 45 is connected to the drain of the thin-film transistor, the input terminal of the flexible transparent triboelectric transistor is the drain, and the output terminal of the flexible transparent triboelectric transistor is the source. Figure 1 Not shown.

[0023] Working principle of flexible transparent triboelectric transistors: Figure 1 In Chinese, "+" represents a positive charge and "-" represents a negative charge, such as... Figure 1 As shown, the movable friction part (flexible substrate 47 and friction layer 48) can slide between the fifth electrode 45 and the sixth electrode 46 under the action of external force, thereby forming a potential difference between the fifth electrode 45 and the sixth electrode 46. In the initial state, the friction layer 48 is in close contact with the fifth electrode 45. Due to the different electron binding capabilities, the surface of the friction layer 48 carries a negative charge, and the fifth electrode 45 carries an equal amount of positive charge. At this time, the positive and negative charges on the upper and lower friction surfaces are in a balanced state. Therefore, the voltage of the gate 41 is 0, and the width of the conductive channel between the source 44 and the drain is not affected. Under the action of external force, the movable friction part (flexible substrate 47 and friction layer 48) moves towards the sixth electrode 46. Under the induction of the negative charge on the friction layer 48, the negative charge on the sixth electrode 46 flows towards the gate 41. Due to the lack of negative charge restraint, the positive charge on the fifth electrode 45 flows towards the source 44. Therefore, a positive potential difference acts on the gate 41 and the source 44 of the organic thin film transistor, causing the width of the conductive channel between the source 44 and the drain to increase, and the source drain current to increase. The source drain current increases with the increase of the displacement value d of the movable friction part.

[0024] To address the technical problem in the prior art where the image information originally displayed by a single pixel is covered by the written notes when the pixel is used to display written notes, this application provides an electronic paper display panel, a touch positioning method for the electronic paper display panel, and a display device, which can solve the problem in the prior art where the image information originally displayed by a single pixel is covered by the written notes when the pixel is used to display written notes.

[0025] Figure 2 An electronic paper display panel provided in the embodiments of this application, such as Figure 2 As shown, the above-mentioned electronic paper display panel includes: The pixel layer includes a plurality of first pixels 10 and a plurality of second pixels 20. The first pixel 10 is composed of at least one first electrophoretic unit, which is used to display image information. The second pixel 20 is composed of at least one second electrophoretic unit, which is used to display note information.

[0026] Specifically, the first electrophoresis unit can be made of an electrophoretic microcapsule or a microcup electrophoretic cell. These two structures contain a number of positively charged black particles and negatively charged color particles suspended in them. Under the action of an electric field, the negatively charged color particles move to the top of the electrophoretic microcapsule or the second electrophoresis unit to realize the color display of image information. The color particles in the first electrophoresis unit of the first pixel in this application can display image information using the existing electronic paper display method, so it will not be described in detail here.

[0027] Specifically, the second electrophoresis unit can be made of capsules or microcups.

[0028] Specifically, the color-developing particles of the second electrophoretic unit in the second pixel can be any color such as red, green, or blue, and this application does not impose any restrictions.

[0029] Specifically, this application can turn off all the second pixels and turn on all the first pixels, so that the electronic paper display panel is used only for display; it can also turn off all the first pixels and turn on all the second pixels, so that the electronic paper display panel is used only for writing notes; or it can turn on all the first pixels and all the second pixels at the same time, so that the electronic paper display panel is used for both display and writing notes.

[0030] Through the above embodiments, the pixel layer of the electronic paper display panel is divided into a first pixel and a second pixel. The first pixel is used to display image information alone, and the second pixel is used to display handwritten notes information alone, without interfering with each other. This solves the problem in the prior art where the image information originally displayed by a single pixel is covered by the handwritten notes information when the pixel is used to display handwritten notes information.

[0031] In one alternative embodiment, the second pixel is disposed between two adjacent first pixels in a row of the first pixels, and / or the second pixel is disposed between two adjacent first pixels in a column of the first pixels.

[0032] Specifically, the second pixel is set between two adjacent first pixels in a row of first pixels, and the second pixel is set between two adjacent first pixels in a column of first pixels. In this case, when writing is displayed, the writing notes can be displayed using only the second pixel set between two adjacent first pixels in a row of first pixels, or only the second pixel set between two adjacent first pixels in a column of first pixels, or the writing notes can be displayed using both the second pixel set between two adjacent first pixels in a row of first pixels and the second pixel set between two adjacent first pixels in a column of first pixels.

[0033] Specifically, the first pixel can be a black and white pixel, meaning the first pixel can only display white or black, such as... Figure 3 As shown, the second pixel 20 is disposed between two adjacent first pixels 10 in a row of first pixels 10, and / or, the second pixel 20 is disposed between two adjacent first pixels 10 in a column of first pixels 10.

[0034] Specifically, in the case where the first pixel is a color pixel, such as Figure 4 As shown, the first pixel 10 includes a red sub-pixel 11, a green sub-pixel 12, and a blue sub-pixel 13. The second pixel 20 is disposed between two adjacent first pixels 10 in a row of first pixels 10, and / or, the second pixel 20 is disposed between two adjacent first pixels 10 in a column of first pixels 10.

[0035] In this embodiment, based on the resolution requirements for displaying handwritten note information, the second pixel can be set between two adjacent first pixels in a row of first pixels, and / or the second pixel can be set between two adjacent first pixels in a column of first pixels.

[0036] In an alternative embodiment, if a lower resolution is required for displaying handwritten notes, a second pixel can be set between two groups of first pixels in a row of first pixels, where a group of first pixels consists of multiple adjacent first pixels. Alternatively, a second pixel can be set directly below a group of first pixels in a row of first pixels.

[0037] In an optional embodiment, the color-developing particles in the second electrophoretic unit of the second pixel are negatively charged, and the second electrophoretic unit of the second pixel further includes positively charged black particles. The mass of the color-developing particles is greater than the mass of the black particles, and the charge of the color-developing particles is less than the charge of the black particles, as shown in FIG5(a). The electronic paper display panel further includes: The first electrode layer includes a plurality of first electrodes 30, each of which corresponds to a second pixel 20. The first electrodes 30 are disposed directly above the top of the second electrophoretic unit 21 in the corresponding second pixel 20. Specifically, the first electrode is a light-transmitting electrode.

[0038] Specifically, the electronic paper display panel includes: a first flexible substrate, the first flexible substrate being light-transmitting, and a first electrode layer disposed on the side of the first flexible substrate near the pixel layer.

[0039] The second electrode layer includes a plurality of second electrodes 31, each of which corresponds to a second pixel 20. The second electrodes 31 are disposed directly below the bottom of the second electrophoretic unit 21 in the corresponding second pixel 20. Specifically, the electronic paper display panel includes: a second flexible substrate, and a second electrode layer disposed on the side of the second flexible substrate near the pixel layer.

[0040] The inductive friction layer includes a plurality of flexible transparent triboelectric transistors, each of which corresponds to a first electrode 30. The flexible transparent triboelectric transistor is located directly above the corresponding first electrode 30, and the output terminal of the flexible transparent triboelectric transistor is connected to the first electrode 30 corresponding to the flexible transparent triboelectric transistor. Specifically, the electronic paper display panel includes: a flexible encapsulation layer, and a friction-sensitive layer disposed on the side of the flexible encapsulation layer near the first electrode layer.

[0041] In one of the aforementioned second pixels 20 being in a non-writing, non-touch mode, the input terminal of the flexible light-transmitting triboelectric transistor corresponding to the second pixel 20 is used to receive a first negative current signal, causing the output terminal of the flexible light-transmitting triboelectric transistor to output a second negative current signal to the first electrode 30 corresponding to the second pixel 20. The second electrode 31 corresponding to the second pixel 20 is used to receive a first positive current signal, thereby driving the black particles in each second electrophoretic unit 21 of the second pixel 20 to move to the top of the second electrophoretic unit 21, and driving the color particles in each second electrophoretic unit 21 of the second pixel 20 to move to the bottom of the second electrophoretic unit 21.

[0042] Specifically, based on the working principle of the flexible light-transmitting triboelectric transistor, when the movable friction part of the flexible light-transmitting triboelectric transistor does not move, the current at the input terminal of the flexible light-transmitting triboelectric transistor cannot reach the output terminal of the flexible light-transmitting triboelectric transistor. Therefore, the absolute value of the first negative current signal is greater than the absolute value of the second negative current signal.

[0043] In this embodiment, when the second pixel is in non-writing and non-touch mode, neither the writing function nor the touch function is enabled. The input terminal of the flexible light-transmitting triboelectric transistor corresponding to the second pixel is used to receive the first negative current signal, so that the output terminal of the flexible light-transmitting triboelectric transistor outputs the second negative current signal to the first electrode corresponding to the second pixel. The second electrode corresponding to the second pixel is used to receive the first positive current signal, as shown in Figure 5(a). At this time, the first electrode 30 has a medium-strong negative charge (--), and the second electrode 31 has a medium-strong positive charge (++). The white particles in Figure 5(a) represent color particles. The black particles in each second electrophoretic unit 21 in the second pixel 20 are attracted by the first electrode 30 and moved to the top of the second electrophoretic unit 21. The color particles in each second electrophoretic unit 21 in the second pixel 20 are attracted by the second electrode 31 and moved to the bottom of the second electrophoretic unit 21. At this time, the second pixel does not display writing notes information.

[0044] In an optional embodiment, when the second pixel is in the writing preparation mode, the input terminal of the flexible light-transmitting triboelectric transistor corresponding to the second pixel is used to receive a second positive current signal, and the movable friction part of the flexible light-transmitting triboelectric transistor corresponding to the second electrophoresis unit is not moved, so that the output terminal of the flexible light-transmitting triboelectric transistor outputs a zero current signal to the first electrode corresponding to the second pixel, and the second electrode corresponding to the second pixel is used to receive a third negative current signal to drive the black particles in each second electrophoresis unit in the second pixel to move to the bottom of the second electrophoresis unit, and keep the color particles in each second electrophoresis unit in the second pixel at the bottom of the second electrophoresis unit, and the absolute value of the third negative current signal is less than the absolute value of the second negative current signal; When the second pixel is in writing mode, the movable friction part of the flexible light-transmitting triboelectric transistor corresponding to the second pixel is used to move a first displacement value, so that the output terminal of the flexible light-transmitting triboelectric transistor outputs the first positive current signal to the first electrode, thereby driving the color particles in each second electrophoretic unit in the second pixel to move to the top of the second electrophoretic unit.

[0045] Specifically, based on the working principle of the flexible light-transmitting triboelectric transistor, when the movable friction part of the flexible light-transmitting triboelectric transistor moves, the current from the input terminal of the flexible light-transmitting triboelectric transistor to the output terminal of the flexible light-transmitting triboelectric transistor will increase. However, it will still not all reach the output terminal. Therefore, the second positive current signal is greater than the first positive current signal.

[0046] Specifically, when the second pixel is in writing mode, the input terminal of the flexible triboelectric transistor corresponding to the second pixel is used to receive a second positive current signal, causing the output terminal of the flexible triboelectric transistor to output a zero current signal to the first electrode corresponding to the second pixel. The second electrode corresponding to the second pixel is used to receive a third negative current signal. The difference between the second pixel being in writing mode and the second pixel being in preparation writing mode is only that when the second pixel is in preparation writing mode, the movable friction part of the flexible triboelectric transistor corresponding to the second electrophoresis unit does not move, i.e., the user is not writing. When the second pixel is in writing mode, the movable friction part of the flexible triboelectric transistor corresponding to the second electrophoresis unit moves by a first displacement value, i.e., the user is writing.

[0047] Specifically, the user's finger moves on the side of the flexible encapsulation layer away from the sensing friction layer, and the flexible encapsulation layer applies external force to the movable friction part of the flexible transparent triboelectric transistor, causing the movable friction part of the flexible transparent triboelectric transistor to move.

[0048] In this embodiment, when the second pixel is in the ready-to-write mode and the writing function is enabled, but the user has not yet written, the input terminal of the flexible transparent triboelectric transistor corresponding to the second pixel is used to receive the second positive current signal, and the flexible transparent triboelectric transistor corresponding to the second electrophoresis unit is kept stationary, so that the output terminal of the flexible transparent triboelectric transistor outputs a zero current signal to the first electrode corresponding to the second pixel. The second electrode corresponding to the second pixel is used to receive the third negative current signal, and the absolute value of the third negative current signal is less than the absolute value of the second negative current signal, as shown in Figure 5(b). As shown, the first electrode 30 is uncharged, and the second electrode 31 has a weak negative charge (-). The white particles in Figure 5(b) represent the color-developing particles. At this time, the black particles, because they have a strong positive charge and a small mass, are quickly attracted to the bottom of the second electrophoresis unit 21 by the second electrode 31. Since the color-developing particles have a weak negative charge and a large mass, their movement is slow, and the repulsive effect of the weak negative charge of the second electrode 31 on the color-developing particles is very small, the position of the color-developing particles basically does not change compared to the second pixel being in a non-writing, non-touch mode. In the second pixel 20, the color-developing particles in each second electrophoretic unit 21 remain at the bottom of the second electrophoretic unit 21, and the black particles in each second electrophoretic unit 21 of the second pixel 20 will mask the color of the color-developing particles in the second electrophoretic unit 21. Therefore, the second pixel will not display written note information. When the second pixel is in writing mode, the movable friction part of the flexible light-transmitting triboelectric transistor corresponding to the second pixel is used to move a first displacement value, that is, the user's finger drives the movable friction part of the flexible light-transmitting triboelectric transistor to move a first displacement value. The displacement value causes the output terminal of the flexible light-transmitting triboelectric transistor to output a first positive current signal to the first electrode, as shown in Figure 5(c). At this time, the first electrode 30 has a medium-strong positive charge (++), and the second electrode 31 has a weak negative charge (-). The white particles in Figure 5(c) represent color particles. At this time, the black particles in each second electrophoresis unit 21 continue to remain at the bottom of the second electrophoresis unit 21. The color particles in each second electrophoresis unit 21 in the second pixel 20 are attracted to the top of the second electrophoresis unit 21 by the first electrode 30, thereby displaying the written note information.

[0049] In an optional embodiment, as shown in FIG5(d), the pixel layer further includes: Multiple third electrodes 32 and multiple fourth electrodes 33 are provided. Each third electrode 32 corresponds to one of the second electrophoresis units 21. The third electrode 32 is disposed on the outer side of the first segment of the first sidewall of the corresponding second electrophoresis unit 21. Each fourth electrode 33 corresponds to one of the second electrophoresis units 21. The fourth electrode 33 is disposed on the outer side of the second segment of the second sidewall of the corresponding second electrophoresis unit 21. Both the first segment and the second segment are close to the bottom of the second electrophoresis unit 21. In the above-mentioned second pixel 20 being in the above-mentioned writing preparation mode, the third electrode 32 corresponding to each second electrophoretic unit 21 in the above-mentioned second pixel 20 is used to receive a third positive current signal, and the fourth electrode 33 corresponding to each second electrophoretic unit 21 in the above-mentioned second pixel 20 is used to receive the third positive current signal, so as to drive the color developing particles in each second electrophoretic unit 21 in the above-mentioned second pixel 20 to move to the first segment of the first sidewall of the second electrophoretic unit 21 and the second segment of the second sidewall of the second electrophoretic unit 21, and the third positive current signal is less than the first positive current signal.

[0050] Specifically, when the second pixel is in writing mode, the third electrode corresponding to each second electrophoretic unit in the second pixel is used to receive the third positive current signal, and the fourth electrode corresponding to each second electrophoretic unit in the second pixel is used to receive the third positive current signal.

[0051] In this embodiment, when the second pixel is in the writing preparation mode, as shown in Figure 5(d), the first electrode 30 is uncharged, and the second electrode 31 has a weak negative charge (-). Since the color-developing particles have a weak negative charge and are heavy and move slowly, and the repulsive effect of the weak negative charge on the color-developing particles from the second electrode 31 is minimal, the position of the color-developing particles remains essentially unchanged. The color-developing particles in each second electrophoretic unit 21 of the second pixel 20 remain at the bottom of the second electrophoretic unit 21. To further ensure that the color-developing particles in each second electrophoretic unit of the second pixel remain at the bottom of the second electrophoretic unit, when the second pixel is in the writing preparation mode... In this formula, the third electrode corresponding to each second electrophoretic unit in the second pixel is used to receive the third positive current signal, and the fourth electrode corresponding to each second electrophoretic unit in the second pixel is used to receive the third positive current signal. The third positive current signal is less than the first positive current signal, as shown in Figure 5(d). At this time, both the third electrode 32 and the fourth electrode 33 have a weak positive charge (+). The white particles in Figure 5(d) represent color-developing particles. Since the color-developing particles have a weak negative charge, the third electrode 32 and the fourth electrode 33 have a weak attraction to the color-developing particles in the second electrophoretic unit 21, ensuring that the position of the color-developing particles in the second electrophoretic unit 21 will not be affected. The situation changes. The color-developing particles in each second electrophoretic unit 21 of the second pixel 20 remain at the bottom left and right positions of the second electrophoretic unit 21. This further ensures that the second pixel does not display written notes. When the second pixel is in writing mode, the movable friction part of the flexible light-transmitting triboelectric transistor corresponding to the second pixel is used to move a first displacement value. That is, the user's finger drives the movable friction part of the flexible light-transmitting triboelectric transistor to move a first displacement value, causing the output terminal of the flexible light-transmitting triboelectric transistor to output... As shown in Figure 5(e), the first positive current signal is sent to the first electrode. At this time, the first electrode 30 has a medium-strong positive charge (++), the second electrode 31 has a weak negative charge (-), and the third electrode 32 and the fourth electrode 33 both have a weak positive charge (+). The white particles in Figure 5(e) represent color particles. At this time, the black particles in each second electrophoresis unit 21 continue to remain at the bottom of the second electrophoresis unit 21. The color particles in each second electrophoresis unit 21 of the second pixel 20 break free from the attraction of the third electrode 32 and the fourth electrode 33 and are attracted to the top of the second electrophoresis unit 21 by the first electrode 30, thereby displaying the written note information.

[0052] In an optional embodiment, when the second pixel is in the non-writing and non-touch mode, the third electrode corresponding to each second electrophoretic unit in the second pixel is used to receive a zero-current signal, and the fourth electrode corresponding to each second electrophoretic unit in the second pixel is used to receive the zero-current signal.

[0053] In this embodiment, when the second pixel is in a non-writing and non-touch mode, the input terminal of the flexible transparent triboelectric transistor corresponding to the second pixel is used to receive the first negative current signal, so that the output terminal of the flexible transparent triboelectric transistor outputs the second negative current signal to the first electrode corresponding to the second pixel. The second electrode corresponding to the second pixel is used to receive the first positive current signal. The third electrode corresponding to each second electrophoretic unit in the second pixel is used to receive the zero current signal. The fourth electrode corresponding to each second electrophoretic unit in the second pixel is used to receive the zero current signal, as shown in Figure 5(f). At this time, the first electrode 30 has a medium-strong negative charge (--), the second electrode 31 has a medium-strong positive charge (++), and the third electrode 32 and the fourth electrode 33 are not charged. The white particles in Figure 5(f) represent color particles. The black particles in each second electrophoretic unit 21 in the second pixel 20 are attracted and moved to the top of the second electrophoretic unit 21 by the first electrode 30, and the color particles in each second electrophoretic unit 21 in the second pixel 20 are attracted and moved to the bottom of the second electrophoretic unit 21 by the second electrode 31.

[0054] In an optional embodiment, when the second pixel is in the ready-to-touch mode, the third electrode corresponding to each second electrophoretic unit of the second pixel is used to receive the third positive current signal, and the fourth electrode corresponding to each second electrophoretic unit of the second pixel is used to receive the third positive current signal.

[0055] Specifically, when the second pixel is in the ready-to-touch mode, the input terminal of the flexible photosensitive triboelectric transistor corresponding to the second pixel is used to receive the first negative current signal, so that the output terminal of the flexible photosensitive triboelectric transistor outputs the second negative current signal to the first electrode corresponding to the second pixel. The second electrode corresponding to the second pixel is used to receive the first positive current signal. The difference between the second pixel being in the ready-to-touch mode and the second pixel being in the non-writing and non-touch mode is only that, in the ready-to-touch mode, the third electrode corresponding to each second electrophoretic unit of the second pixel is used to receive the third positive current signal, and the fourth electrode corresponding to each second electrophoretic unit of the second pixel is used to receive the third positive current signal. In the non-writing and non-touch mode, the third electrode corresponding to each second electrophoretic unit of the second pixel is used to receive the zero current signal, and the fourth electrode corresponding to each second electrophoretic unit of the second pixel is used to receive the zero current signal.

[0056] Specifically, when the second pixel is in the ready-to-touch mode, the input terminal of the flexible phototransparent triboelectric transistor corresponding to the second pixel is used to receive the first negative current signal, so that the output terminal of the flexible phototransparent triboelectric transistor outputs the second negative current signal to the first electrode corresponding to the second pixel. The second electrode corresponding to the second pixel is used to receive the first positive current signal. The third electrode corresponding to each second electrophoretic unit of the second pixel is used to receive the third positive current signal, and the fourth electrode corresponding to each second electrophoretic unit of the second pixel is used to receive the third positive current signal, as shown in Figure 6(a). At this time, the first electrode 30 has a medium-strong negative charge (--), and the second electrode 31 has a medium-strong positive charge. (++), the third electrode 32 and the fourth electrode 33 are both weakly positively charged (+), the white particles in Figure 6(a) represent color particles. Since the color particles are weakly negatively charged and have a large mass, they move slowly. The second electrode 31 has a weak negative charge and has little repulsive effect on the color particles. The third electrode 32 and the fourth electrode 33 have a weak attractive force on the color particles in the second electrophoresis unit 21. Compared with the second pixel being in a non-writing and non-touch mode, the position of the color particles in the second electrophoresis unit 21 will not change. The color particles in each second electrophoresis unit 21 in the second pixel 20 remain at the bottom of the second electrophoresis unit 21, ensuring that the second pixel does not display writing notes information.

[0057] In an optional embodiment, when the second pixel is in touch mode, the rubble-movable part of the flexible light-transmitting triboelectric transistor corresponding to the second pixel is used to move a second displacement value, so that the output terminal of the flexible light-transmitting triboelectric transistor outputs a third negative current signal to the first electrode, and the third negative current signal is greater than the second negative current signal.

[0058] Specifically, when the second pixel is in touch mode, the input terminal of the flexible light-transmitting triboelectric transistor corresponding to the second pixel is used to receive a first negative current signal, the second electrode corresponding to the second pixel is used to receive a first positive current signal, the third electrode corresponding to each second electrophoretic unit of the second pixel is used to receive a third positive current signal, and the fourth electrode corresponding to each second electrophoretic unit of the second pixel is used to receive a third positive current signal. The difference between the second pixel being in touch mode and the second pixel being in touch preparation mode is only that, in touch mode, the rubble-movable part of the flexible light-transmitting triboelectric transistor corresponding to the second pixel is used to move a second displacement value, and in touch preparation mode, the rubble-movable part of the flexible light-transmitting triboelectric transistor corresponding to the second pixel does not move.

[0059] Specifically, the user's finger moves on the side of the flexible encapsulation layer away from the sensing friction layer, and the flexible encapsulation layer applies external force to the movable friction part of the flexible transparent triboelectric transistor, causing the movable friction part of the flexible transparent triboelectric transistor to move.

[0060] In this embodiment, when the second pixel is in touch mode and the user touches it, the rubble-movable part of the flexible light-transmitting triboelectric transistor corresponding to the second pixel is used to move the second displacement value, so that the output terminal of the flexible light-transmitting triboelectric transistor outputs a third negative current signal to the first electrode. The second electrode corresponding to the second pixel is used to receive the first positive current signal, as shown in Figure 6(b). At this time, the first electrode 30 has a strong negative charge (---), the second electrode 31 has a medium strong positive charge (++), and the third electrode 32 and the fourth electrode 33 both have a weak positive charge (+). The white particles in Figure 6(b) represent color-developing particles. One electrode 30 has a strong negative charge (---). Compared to the second pixel being in the ready-to-touch mode, the position of the black particles does not change, keeping the black particles in the second electrophoretic unit 21 of the second pixel 20 at the top of the second electrophoretic unit 21, so that the second pixel does not display the writing note information. However, compared to the second pixel being in the ready-to-touch mode, when the second pixel is in the touch mode, the negativeness of the current signal in the first electrode is enhanced. Therefore, if the absolute value of the current signal of the first electrode is greater than the absolute value of the second negative current signal, it can be determined that the second pixel is touched, thereby realizing the touch positioning of the electronic paper display panel.

[0061] Figure 7 This application provides a touch positioning method for an electronic paper display panel, wherein the electronic paper display panel is divided into multiple regions, and each of the multiple regions corresponds one-to-one with a plurality of second pixels, wherein the second pixels are located in their corresponding regions, such as... Figure 7 As shown, the above method includes: Step S101: Obtain the current signal in the first electrode corresponding to the multiple second pixels; Step S102: Determine the touch area based on the current signals of the first electrode corresponding to the plurality of second pixels. The touch area is composed of at least one second pixel. The absolute value of the current signal of the first electrode corresponding to the second pixel in the touch area is greater than the absolute value of the second negative current signal. The second negative current signal is the current signal in the first electrode corresponding to the second pixel when the second pixel is in the ready touch mode.

[0062] Specifically, the actual location of the user's finger touch should be the part of the flexible encapsulation layer located in the touch area on the side away from the sensing friction layer.

[0063] In the above embodiments, when the second pixel is in the ready-to-touch mode, the current signal in the first electrode is the second negative current signal. Compared with the second pixel being in the ready-to-touch mode, when the second pixel is in the touch mode, the negativeness of the current signal in the first electrode is enhanced. Therefore, if the absolute value of the current signal of the first electrode is greater than the absolute value of the second negative current signal, it can be determined that the second pixel is touched, thereby realizing the touch positioning of the electronic paper display panel.

[0064] This application provides a display device, which includes: Any of the above-mentioned electronic paper display panels; The driving substrate is connected to multiple first electrodes in the display panel via multiple first traces, multiple second traces, multiple third traces, multiple fourth traces, and multiple fifth traces to the input terminals of multiple flexible light-transmitting triboelectric transistors in the display panel.

[0065] Specifically, a current signal is provided to the first electrode, second electrode, third electrode, fourth electrode, and input terminal of the flexible light-transmitting triboelectric transistor in the electronic paper display panel through a driving substrate.

[0066] Through the above embodiments, the pixel layer of the electronic paper display panel is divided into a first pixel and a second pixel. The first pixel is used to display image information alone, and the second pixel is used to display handwritten notes information alone, without interfering with each other. This solves the problem in the prior art where the image information originally displayed by a single pixel is covered by the handwritten notes information when the pixel is used to display handwritten notes information.

[0067] The beneficial effects of this application are: 1) Image information and handwritten note information are independent of each other: This application divides the pixel layer of the electronic paper display panel into a first pixel and a second pixel. The first pixel is used to display image information alone, and the second pixel is used to display handwritten note information alone. They do not interfere with each other, thereby solving the problem in the prior art that when a single pixel is used to display handwritten note information, the image information originally displayed by that pixel will be covered by the handwritten note information.

[0068] 2) The structure of the electronic paper display panel is simplified and the cost and power consumption of the electronic paper display panel are significantly reduced: The existing electronic paper display panel uses touch technology to locate the touch area and then controls the pixels of the touch area to display the written notes. However, the present application does not require locating the touch area. When the user's finger drives the movable friction part of the flexible light-transmitting triboelectric transistor to move by a first displacement value, the output terminal of the flexible light-transmitting triboelectric transistor outputs a first positive current signal to the first electrode, so that the first electrode has a medium-strong positive charge. The color particles in each second electrophoretic unit in the second pixel are attracted to the top of the second electrophoretic unit by the first electrode, thereby displaying the written notes. This simplifies the structure of the electronic paper display panel and significantly reduces the cost and power consumption of the electronic paper display panel, which is especially suitable for flexible electronic paper display devices.

[0069] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0070] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0071] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An electronic paper display panel, characterized by, The electronic paper display panel comprises: a pixel layer comprising a plurality of first pixels and a plurality of second pixels, the first pixel being composed of at least one first electrophoretic cell, the first electrophoretic cell in the first pixel being used to display image information, the second pixel being composed of at least one second electrophoretic cell, the second electrophoretic cell in the second pixel being used to display written note information.

2. The electronic paper display panel of claim 1, wherein, The second pixel is arranged between two adjacent first pixels in a row of the first pixels, and / or the second pixel is arranged between two adjacent first pixels in a column of the first pixels.

3. The electronic paper display panel of claim 1, wherein, The second electrophoretic cell comprises negatively charged color particles and positively charged black particles, the mass of the color particles being greater than the mass of the black particles, and the charge of the color particles being less than the charge of the black particles, and the electronic paper display panel further comprises: a first electrode layer comprising a plurality of first electrodes, the first electrodes corresponding one-to-one to the second pixels, the first electrodes being arranged directly above the top of the second electrophoretic cells in the corresponding second pixels; a second electrode layer comprising a plurality of second electrodes, the second electrodes corresponding one-to-one to the second pixels, the second electrodes being arranged directly below the bottom of the second electrophoretic cells in the corresponding second pixels; an induction rubbing layer comprising a plurality of flexible transparent rubbing electronics transistors, the flexible transparent rubbing electronics transistors corresponding one-to-one to the first electrodes, the flexible transparent rubbing electronics transistors being arranged directly above the corresponding first electrodes, and the output terminals of the flexible transparent rubbing electronics transistors being connected to the corresponding first electrodes; wherein, in a non-writing non-touch mode of the second pixel, the input terminal of the flexible transparent rubbing electronics transistor corresponding to the second pixel is used to receive a first negative current signal, the output terminal of the flexible transparent rubbing electronics transistor outputs a second negative current signal to the first electrode corresponding to the second pixel, and the second electrode corresponding to the second pixel is used to receive a first positive current signal to drive the black particles in each second electrophoretic cell in the second pixel to move to the top of the second electrophoretic cell, and drive the color particles in each second electrophoretic cell in the second pixel to move to the bottom of the second electrophoretic cell.

4. The electronic paper display panel of claim 3, wherein, In the second pixel in the preparation writing mode, the input end of the flexible transparent tribological electronic transistor corresponding to the second pixel is used for receiving a second positive current signal, the movable rubbing part of the flexible transparent tribological electronic transistor corresponding to the second pixel is used for not moving, the output end of the flexible transparent tribological electronic transistor outputs a zero current signal to the first electrode corresponding to the second pixel, and the second electrode corresponding to the second pixel is used for receiving a third negative current signal, so that the black particles in each second electrophoretic cell in the second pixel move to the bottom of the second electrophoretic cell, and the color-developing particles in each second electrophoretic cell in the second pixel are kept at the bottom of the second electrophoretic cell, and the absolute value of the third negative current signal is smaller than the absolute value of the second negative current signal. In the second pixel in the writing mode, the movable rubbing part of the flexible transparent tribological electronic transistor corresponding to the second pixel is used for moving a first displacement value, so that the output end of the flexible transparent tribological electronic transistor outputs the first positive current signal to the first electrode, and the color-developing particles in each second electrophoretic cell in the second pixel move to the top of the second electrophoretic cell.

5. The electronic paper display panel of claim 4, wherein, The pixel layer further comprises: a plurality of third electrodes and a plurality of fourth electrodes, the third electrodes correspond to the second electrophoretic cells one by one, the third electrodes are arranged outside the first segment of the first side wall of the corresponding second electrophoretic cells, the fourth electrodes correspond to the second electrophoretic cells one by one, and the fourth electrodes are arranged outside the second segment of the second side wall of the corresponding second electrophoretic cells, and the first segment and the second segment are close to the bottom of the second electrophoretic cell; In the second pixel in the preparation writing mode, the corresponding third electrode of each second electrophoretic cell in the second pixel is used for receiving a third positive current signal, and the corresponding fourth electrode of each second electrophoretic cell in the second pixel is used for receiving the third positive current signal, so that the color-developing particles in each second electrophoretic cell in the second pixel move to the first segment of the first side wall of the second electrophoretic cell and the second segment of the second side wall of the second electrophoretic cell, and the third positive current signal is smaller than the first positive current signal.

6. The electronic paper display panel of claim 5, wherein, In the second pixel in the non-writing non-touch mode, the corresponding third electrode of each second electrophoretic cell in the second pixel is used for receiving a zero current signal, and the corresponding fourth electrode of each second electrophoretic cell in the second pixel is used for receiving the zero current signal.

7. The electronic paper display panel of claim 6, wherein, In the second pixel in the touch mode, the movable rubbing part of the flexible transparent tribological electronic transistor corresponding to the second pixel is used for moving a second displacement value, so that the output end of the flexible transparent tribological electronic transistor outputs a third negative current signal to the first electrode, and the absolute value of the third negative current signal is greater than the absolute value of the second negative current signal.

8. The electronic paper display panel of claim 7, wherein, In the second pixel in the preparation touch mode, the third electrode of each second electrophoretic cell of the second pixel is used for receiving the third positive current signal, and the fourth electrode of each second electrophoretic cell of the second pixel is used for receiving the third positive current signal. 9.A touch positioning method of an electronic paper display panel, characterized in that, The electronic paper display panel is divided into a plurality of regions, the plurality of regions correspond to a plurality of second pixels one by one, the second pixels are located in the corresponding regions, and the method comprises: Obtaining the current signal in the first electrode corresponding to the plurality of second pixels; According to the current signal of the first electrode corresponding to the plurality of second pixels, a touch area is determined, the touch area is composed of at least the region corresponding to one of the second pixels, the absolute value of the current signal of the first electrode corresponding to the second pixel in the touch area is greater than the absolute value of the second negative current signal, and the second negative current signal is the current signal in the first electrode corresponding to the second pixel in the preparation touch mode of the second pixel.

10. A display device, characterized by comprising: The display device comprises: The electronic paper display panel of any one of claims 1 to 8; A driving substrate, the driving substrate is connected with the plurality of first electrodes in the display panel through a plurality of first wires one by one, the driving substrate is connected with the plurality of second electrodes in the display panel through a plurality of second wires one by one, the driving substrate is connected with the plurality of third electrodes in the display panel through a plurality of third wires one by one, the driving substrate is connected with the plurality of fourth electrodes in the display panel through a plurality of fourth wires one by one, and the driving substrate is connected with the input end of the plurality of flexible transparent frictional electron crystal transistors in the display panel through a plurality of fifth wires one by one.

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