Display panel, electronic paper and control method

Abstract

The application discloses a display panel, electronic paper and a control method, and relates to the technical field of display. The display panel is provided with a pressure-sensitive capacitor layer. After detecting a capacitance change amount, a control module can determine a pressure value corresponding to external pressure based on the capacitance change amount. When the pressure value is greater than a preset pressure threshold, a first pixel unit bearing external pressure is located, at least one second pixel unit adjacent to the first pixel unit is determined, and then the electrical connection between the first pixel unit and the corresponding data line and the scanning line and the electrical connection between the second pixel unit and the corresponding data line and the scanning line are disconnected. When the first pixel unit bears a large external pressure, the microcapsule in the first pixel unit breaks and generates a leakage electrophoretic fluid, even if the leakage electrophoretic fluid diffuses from the first pixel unit to the second pixel unit in a horizontal direction, a short circuit cannot be formed at the second pixel unit, so that the leakage electrophoretic fluid cannot cause a pixel electrode short circuit and row and column failure, and display defects are limited to a local area.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to display panels, electronic paper, and control methods. Background Technology

[0002] Electronic paper employs electrophoretic display technology, where the electronic ink film contains numerous microcapsules. These microcapsules encapsulate charged pigment particles and an electrophoretic solution. When the surface of the electronic paper is subjected to a sharp object impact or localized high pressure, the microcapsule walls rupture irreversibly, causing the internal electrophoretic solution to leak out. This leaked electrophoretic solution is conductive; when it diffuses laterally to adjacent pixel areas, it creates an uncontrolled low-resistance conductive path between the pixel electrode and the common electrode. This causes the pixel in that area to appear constantly black or constantly bright, forming permanent dark or bright spots. When the leakage is significant or the diffusion range is wide, it can even trigger localized short circuits in the row or column direction, causing the entire row or column of pixels to fail, resulting in a sharp deterioration in display quality and even rendering the entire screen unusable.

[0003] To address the aforementioned risk of microcapsule rupture, traditional solutions typically employ a protective layer consisting of an integral tempered glass layer or a thick polyethylene terephthalate (PET) protective film bonded to the light-emitting side of the electronic paper. These protective layers, through their high mechanical strength and surface hardness, form a physical barrier on the electronic paper surface, dispersing and isolating external sharp objects or localized impact loads from the electronic ink film, thereby reducing the probability of microcapsules being punctured or crushed.

[0004] However, the passive physical protection solutions based on tempered glass or thick protective films mentioned above will break down the display panel when subjected to external impacts exceeding its mechanical strength limit. The subsequent impact energy will directly act on the electronic ink film, and microcapsule rupture and electrophoretic fluid leakage will still be unavoidable. After the leaked conductive electrophoretic fluid spreads laterally between pixels, it will still cause short circuits in the pixel electrodes and row / column failures. Summary of the Invention

[0005] The main objective of this application is to provide a display panel, electronic paper, and control method, which aims to solve the technical problem that pixel electrode short circuits and row / column failures occur when the display panel is subjected to external pressure in a conventional manner.

[0006] To achieve the above objectives, this application proposes a display panel, which includes at least: a first substrate, a second substrate, a first electrode, a second electrode, an electronic ink layer, and a varistor layer; The first substrate and the second substrate are disposed opposite to each other, and the electronic ink layer is disposed between the first substrate and the second substrate; The first electrode is disposed on the side of the first substrate facing the electronic ink layer; The second electrode is disposed on the side of the second substrate facing the electronic ink layer and forms a capacitor with the first electrode. The second electrode is electrically connected to the control module. The varistor layer is disposed on the side of the second electrode facing the electronic ink layer; The pressure-sensitive capacitor layer is used to deform under external pressure, so that the capacitor produces a change in capacitance. The control module is used to detect the change in capacitance and determine the pressure value corresponding to the external pressure based on the change in capacitance. The control module is also used to locate the first pixel unit that bears the external pressure when the pressure value is greater than the preset pressure threshold, and to determine at least one second pixel unit adjacent to the first pixel unit. The control module is also used to disconnect the electrical connection between the first pixel unit and the second pixel unit and their respective data lines and scan lines.

[0007] In one embodiment, the display panel further includes: microchannels; The first substrate has a display area and a non-display area located around the display area; The microchannel is disposed on the side of the first substrate facing the electronic ink layer and is located in the non-display area; The microchannel is used to guide the leaked electrophoretic solution away from the display area when there is leakage of the electrophoretic solution in the electronic ink layer.

[0008] In one embodiment, the display panel further includes: an absorbent pad; The absorbent pad is disposed in the non-display area and is connected to the microchannel; The absorbent pad is used to absorb and lock in the electrophoretic solution guided by the microchannel.

[0009] In one embodiment, the display panel further includes: a color resist layer, a conductive layer, and a light-shielding layer; The color resist layer and the light-shielding layer are disposed on the same layer and on the side of the second substrate near the second electrode; The color resist layer and the light-shielding layer are arranged alternately along the plane of the display panel; The conductive layer is disposed on the side of the first substrate near the first electrode.

[0010] In one embodiment, the display panel further includes: a sealing adhesive; The sealing adhesive is disposed between the first substrate and the second substrate, and is located in the non-display area; The sealing adhesive is used to bond the first substrate and the second substrate.

[0011] In addition, to achieve the above objectives, this application also proposes an electronic paper, which includes: a control module and the display panel described above; The control module is connected to the display panel; The control module is used to detect the capacitance change of the capacitor in the display panel. The capacitance change is caused by the deformation of the varistor layer in the display panel under external pressure. The control module is also used to determine the pressure value corresponding to the external pressure based on the change in capacitance; The control module is also used to locate the first pixel unit in the display panel that bears the external pressure and at least one second pixel unit adjacent to the first pixel unit when the pressure value is greater than a preset pressure threshold. The control module is also used to disconnect the electrical connection between the first pixel unit and the second pixel unit and their respective data lines and scan lines.

[0012] In one embodiment, the control module is further configured to determine that at least a portion of the pixel units surrounding the second pixel unit are compensation pixel units when the first pixel unit and the second pixel unit are in an electrically disconnected state. The control module is further configured to apply a compensation driving voltage to the compensation pixel unit, so that the electric field generated by the compensation pixel unit covers the area where the first pixel unit and the second pixel unit are located, thereby driving the charged particles in the unruptured microcapsules in the second pixel unit covered by the electric field to undergo directional migration.

[0013] In one embodiment, the control module includes: a signal generator, a detection circuit, and a processor; The signal generator is connected to the second electrode, and the detection circuit is connected to the data line and the processor. The signal generator is used to apply a detection signal to the second electrode of the display panel. The detection signal is coupled to the first electrode via the equivalent capacitance between the first electrode and the second electrode in the display panel, and generates a response signal on the data line electrically connected to the first electrode. The detection circuit is used to receive the response signal and determine the corresponding digital voltage signal based on the response signal; The processor is configured to determine the capacitance change of the capacitor based on the digital voltage signal.

[0014] In one embodiment, the detection circuit includes: a voltage conversion circuit, a bandpass filter circuit, a phase-sensitive detector circuit, a low-pass filter circuit, and an analog-to-digital converter; The bandpass filter circuit is connected to the voltage conversion circuit and the phase-sensitive detector circuit respectively. The voltage conversion circuit is connected to the data line. The low-pass filter circuit is connected to the phase-sensitive detector circuit and the analog-to-digital converter respectively. The phase-sensitive detector circuit is connected to the signal generator. The analog-to-digital converter is also connected to the processor. The voltage conversion circuit is used to receive the response signal and convert the response signal into a voltage signal; The bandpass filter circuit is used to filter out noise components in the voltage signal; The phase-sensitive detection circuit is used to perform phase-locked demodulation on the filtered voltage signal using the detection signal as a reference signal, and output a mixed signal containing DC and AC components. The low-pass filter circuit is used to filter out the AC component in the mixed signal and output a DC voltage signal corresponding to the capacitance value of the capacitor. The analog-to-digital converter is used to convert the DC voltage signal into a digital voltage signal.

[0015] Furthermore, to achieve the above objectives, this application also proposes a control method based on the electronic paper described above, the control method comprising: The capacitance change of the capacitor in the display panel is detected. The capacitance change is caused by the deformation of the varistor layer in the display panel under external pressure. The pressure value corresponding to the external pressure is determined based on the change in capacitance. When the pressure value is greater than a preset pressure threshold, the first pixel unit in the display panel that bears the external pressure, and at least one second pixel unit adjacent to the first pixel unit are located. Disconnect the electrical connections between the first pixel unit and the second pixel unit and their respective data lines and scan lines.

[0016] One or more technical solutions proposed in this application have at least the following technical effects: The display panel provided in this application includes at least: a first substrate, a second substrate, a first electrode, a second electrode, an electronic ink layer, and a varistor layer; the first substrate and the second substrate are disposed opposite to each other, and the electronic ink layer is disposed between the first substrate and the second substrate; the first electrode is disposed on the side of the first substrate facing the electronic ink layer; the second electrode is disposed on the side of the second substrate facing the electronic ink layer, and forms a capacitor with the first electrode, and the second electrode is electrically connected to a control module; the varistor layer is disposed on the side of the second electrode facing the electronic ink layer; the varistor layer deforms under external pressure, causing a change in capacitance. By providing a varistor layer in the display panel, this application enables the control module to determine the pressure value corresponding to the external pressure based on the capacitance change after detecting the change in capacitance, and when the pressure value is greater than a preset pressure threshold, locate the first pixel unit bearing the external pressure and determine at least one second pixel unit adjacent to the first pixel unit, thereby disconnecting the electrical connection between the first pixel unit and the second pixel unit and their respective data lines and scan lines. Based on this, when the microcapsules inside the first pixel unit rupture and leak electrophoretic fluid due to the large external pressure, since the first pixel unit and the adjacent second pixel unit are in a state of no electrical connection, even if the leaked electrophoretic fluid spreads laterally from the first pixel unit to the second pixel unit, it cannot form a short circuit at the second pixel unit. This avoids the leaked electrophoretic fluid causing short circuits in the pixel electrodes and row / column failures, thus limiting the display defects to a local area. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] To more clearly illustrate the technical solutions in the embodiments of this application 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.

[0019] Figure 1 This is a schematic diagram of the structure of the display panel in this application; Figure 2 This is a top view of the display panel of this application; Figure 3 This is a schematic diagram of the electronic paper structure of this application; Figure 4 This is a schematic diagram of the distribution of elemental cells in the electronic paper of this application; Figure 5 This is a schematic diagram of the control module in the electronic paper embodiment of this application; Figure 6This is a flowchart illustrating the electronic paper control method of this application.

[0020] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0022] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0023] The main solution of this application embodiment is: the display panel includes at least a first substrate, a second substrate, a first electrode, a second electrode, an electronic ink layer, and a varistor layer; the first substrate and the second substrate are disposed opposite to each other, and the electronic ink layer is disposed between the first substrate and the second substrate; the first electrode is disposed on the side of the first substrate facing the electronic ink layer; the second electrode is disposed on the side of the second substrate facing the electronic ink layer, and forms a capacitor with the first electrode, and the second electrode is electrically connected to the control module; the varistor layer is disposed on the side of the second electrode facing the electronic ink layer; the varistor layer deforms under external pressure, causing the capacitor to produce a change in capacitance.

[0024] Because traditional passive physical protection solutions based on tempered glass or thick protective films will be punctured when the display panel is subjected to external impacts exceeding its mechanical strength limit, the subsequent impact energy will directly act on the electronic ink film, and microcapsule rupture and electrophoretic fluid leakage will still be unavoidable. After the leaked conductive electrophoretic fluid spreads laterally between pixels, it will still cause short circuits in the pixel electrodes and row and column failures.

[0025] This application provides a solution that, by setting a pressure-sensitive capacitor layer in the display panel, enables the control module to determine the pressure value corresponding to the external pressure based on the capacitance change after detecting the capacitance change. When the pressure value exceeds a preset pressure threshold, the control module locates the first pixel unit bearing the external pressure and identifies at least one second pixel unit adjacent to the first pixel unit, thereby disconnecting the electrical connections between the first pixel unit and the second pixel unit and their respective data lines and scan lines. Based on this, when the microcapsules inside the first pixel unit rupture due to the large external pressure, resulting in leaked electrophoretic fluid, since both the first pixel unit and the adjacent second pixel unit are in a state of no electrical connection, even if the leaked electrophoretic fluid diffuses laterally from the first pixel unit to the second pixel unit, it cannot form a short circuit at the second pixel unit. This avoids the leaked electrophoretic fluid causing short circuits in the pixel electrodes and row / column failures, thus limiting the display defects to a localized area.

[0026] Based on this, this application provides a display panel 10, referring to... Figure 1 , Figure 1 This is a schematic diagram of the display panel structure of this application. Figure 1 It can be used as a cross-sectional view of the display panel.

[0027] In this embodiment, the display panel 10 includes at least: a first substrate 11, a second substrate 12, a first electrode 21, a second electrode 22, an electronic ink layer 30, and a varistor layer 40.

[0028] The first substrate 11 and the second substrate 12 are disposed opposite to each other, and the electronic ink layer 30 is disposed between the first substrate 11 and the second substrate 12.

[0029] The first electrode 21 is disposed on the side of the first substrate 11 facing the electronic ink layer 30.

[0030] The second electrode 22 is disposed on the side of the second substrate 12 facing the electronic ink layer 30, and forms a capacitor with the first electrode 21. The second electrode 22 is electrically connected to the control module 50.

[0031] The varistor layer 40 is disposed on the side of the second electrode 22 facing the electronic ink layer 30.

[0032] It should be noted that the first substrate 11 can be a structural layer that provides physical support for each functional layer disposed thereon.

[0033] Understandably, the second substrate 12 can serve as the light-emitting side of the display panel 10, allowing external light to enter and reflected light to exit, and providing physical protection for the functional layers disposed between the first substrate 11 and the second substrate 12.

[0034] It should be noted that the first electrode 21 can be a pixel electrode that receives the grayscale voltage written by the data line. An electric field can be formed between the first electrode 21 and the second electrode 22 to drive the migration of corresponding charged particles in the electronic ink layer 30.

[0035] Understandably, the second electrode 22 can serve as a common reference electrode for the first electrode 21, forming an electric field between them. The potential of the second electrode 22 remains constant or changes according to a predetermined time sequence, so that charged particles undergo directional migration under the influence of the electric field.

[0036] It should be noted that the electronic ink layer 30 can be a functional layer that achieves grayscale display through the directional migration of charged pigment particles under the action of an electric field. It contains multiple microcapsules 31, and each microcapsule encapsulates charged pigment particles 32 and electrophoretic solution 33. The charged pigment particles 32 are disposed in the electrophoretic solution 33.

[0037] Understandably, the varistor layer 40 can be a pressure-sensing functional layer with a variable dielectric constant, and can be composed of polydimethylsiloxane and expandable microspheres. The varistor layer 40 is disposed between the second substrate 12 and the second electrode 22, and its thickness changes under external pressure, causing a change in the capacitance value between the first electrode 21 and the second electrode 22.

[0038] It should be noted that the capacitor is composed of a first electrode 21, a second electrode 22 and a dielectric layer sandwiched between them. The dielectric layer includes an electronic ink layer 30 and a varistor layer 40, which are used to generate a change in capacitance that varies with pressure under external pressure.

[0039] Understandably, the control module 50 can be a signal generation and processing unit, electrically connected to the second electrode 22 and the data line, used to apply a detection signal to the second electrode 22 and receive a feedback signal on the data line to detect the capacitance change of the capacitor. The detection signal can be a high-frequency AC voltage signal with a frequency higher than the display refresh rate of the electronic paper, and the voltage amplitude of the detection signal is less than the driving threshold voltage of the charged particles in the electronic ink layer 30.

[0040] It should be noted that the display panel 10, composed of the first substrate 11, the second substrate 12, the first electrode 21, the second electrode 22, the electronic ink layer 30, and the varistor layer 40, is used in electronic paper as a display component. Electronic paper is a display device employing electrophoretic display technology. The display panel 10 contains multiple microcapsules, each encapsulating charged pigment particles and an electrophoretic solution. By applying an electric field, the charged pigment particles are driven to migrate directionally within the microcapsules, causing each pixel unit to display different gray levels, thereby achieving image display. Electronic paper can be a reflective display device, relying on ambient light illuminating the electronic ink layer 30 and reflecting it to the viewer's eye to achieve display, eliminating the need for a backlight.

[0041] The pressure-sensitive capacitor layer 40 is used to deform under external pressure, causing the capacitor to produce a change in capacitance.

[0042] In its implementation, when the surface of the display panel 10 is impacted by an external object or subjected to localized high pressure, the resulting external pressure is transmitted to the varistor layer 40 via the second substrate 12. The varistor layer 40 is disposed between the second electrode 22 and the second substrate 12. When external pressure acts on the varistor layer 40, it is compressed, reducing its thickness. Since the equivalent distance between the first electrode 21 and the second electrode 22 is the spatial distance between the two plates, a decrease in this spatial distance means that the electric field strength between the two plates increases under the same voltage, and the amount of charge that can accumulate on the plates increases accordingly. Therefore, when the distance between the two plates decreases, the capacitance of the capacitor increases accordingly, resulting in a change in capacitance. When the external pressure disappears, the varistor layer 40 recovers to its original thickness under the elastic restoring force of polydimethylsiloxane, and the capacitance of the capacitor returns to its initial value.

[0043] The control module 50 is used to detect the change in capacitance and determine the pressure value corresponding to the external pressure based on the change in capacitance.

[0044] In a specific implementation, the control module 50 can apply a detection signal to the second electrode 22. After the detection signal is applied to the second electrode 22, it is coupled to the first electrode 21 via a capacitor between the first electrode 21 and the second electrode 22, and a response signal is generated on the data line electrically connected to the first electrode 21. This response signal can be a displacement current signal generated on the data line electrically connected to the first electrode 21 after the detection signal is coupled to the first electrode 21 via the capacitor. The amplitude of the response signal is related to the capacitance value of the capacitor. Since the capacitance value of the capacitor between the first electrode 21 and the second electrode 22 changes with the change of external pressure, the amplitude of the response signal also changes accordingly.

[0045] The control module 50 receives the response signal generated on the data line, processes the response signal, and converts it into a corresponding DC voltage signal. The voltage value of the DC voltage signal corresponds to the capacitance value of the capacitor. Subsequently, based on the voltage value of the DC voltage signal and through a pre-set voltage-pressure mapping relationship, the control module 50 determines the pressure value corresponding to the voltage value of the DC voltage signal. This pressure value is the pressure value corresponding to the external pressure.

[0046] It should be understood that before the electronic paper leaves the factory or is put into use, multiple standard pressures of known values ​​can be applied to the display panel 10, with each standard pressure acting on a different pixel unit position of the display panel 10. For each standard pressure, the control module 50 applies a corresponding detection signal to the second electrode 22 and receives the response signal generated on the data line. After signal processing, the voltage value of the DC voltage signal corresponding to the standard pressure is obtained. Each standard pressure value and the corresponding measured DC voltage signal voltage value are recorded to form multiple sets of corresponding pressure and voltage data points. By fitting or interpolating multiple sets of data points, a voltage-pressure mapping relationship is constructed, which is pre-stored in the control module 50 in the form of a lookup table or a fitted curve.

[0047] The control module 50 is further configured to locate the first pixel unit bearing the external pressure when the pressure value is greater than a preset pressure threshold, and to determine at least one second pixel unit adjacent to the first pixel unit.

[0048] It should be noted that the first pixel unit can be a pixel unit in the display panel 10 that is subjected to external pressure, and the microcapsules at its corresponding positions are at risk of rupture when the external pressure exceeds a preset pressure threshold.

[0049] Understandably, the second pixel unit can be a pixel unit adjacent to the first pixel unit, and the electrophoretic liquid will spread laterally to the second pixel unit along the plane of the panel after leaking from the first pixel unit.

[0050] It should be noted that the preset pressure threshold can be the maximum pressure that the microcapsule wall can withstand. When the pressure value corresponding to the external pressure is greater than this threshold, it indicates that there is a risk of rupture of the microcapsule at that location.

[0051] In its implementation, the control module 50 compares the pressure value corresponding to the external pressure with a preset pressure threshold. When the pressure value is greater than the preset pressure threshold, it indicates that there is a risk of microcapsule rupture at the location corresponding to that pressure value. At this time, the control module 50 determines the column where the capacitance change occurs by detecting the location of the change in the response signal on the data line; simultaneously, the control module 50 determines the row where the capacitance change occurs by synchronously reading the current row scan timing signal; based on the determined column and row, the first pixel unit bearing the external pressure is cross-located.

[0052] Subsequently, the control module 50, based on the coordinates of the first pixel unit, determines multiple pixel units adjacent to the first pixel unit as second pixel units, centered on the first pixel unit. The second pixel unit includes adjacent pixel units located above, below, to the left, to the right, to the upper left, to the upper right, to the lower left, and to the lower right of the first pixel unit. The second pixel unit can be a ring of adjacent pixel units distributed around the first pixel unit, with the first and second pixel units together forming a pixel region centered on the first pixel unit. This pixel region covers the nearest neighbor pixel range that may be infiltrated during the initial lateral diffusion of the electrophoretic fluid after leakage from the first pixel unit. For example, the second pixel unit may include pixel units located above, below, to the left, to the right, to the upper left, to the upper right, to the lower left, and to the lower right of the first pixel unit, forming a 3×3 pixel region together with the first pixel unit.

[0053] It should be understood that when the first pixel unit is located in the edge area of ​​the display panel 10, there may be no adjacent pixel units on one side or in several directions. In this case, the second pixel unit is the actual adjacent pixel unit around the first pixel unit. The number of the second pixel unit is determined according to the position of the first pixel unit in the display panel 10, and is not limited to a specific number.

[0054] The control module 50 is also used to disconnect the electrical connection between the first pixel unit and the second pixel unit and their respective data lines and scan lines.

[0055] It should be noted that the data line can be a signal line used to transmit grayscale voltage signals to each pixel unit. It is electrically connected to the source of the thin-film transistor and driven by the source driver.

[0056] Understandably, a scan line can be a signal line used to transmit gate drive signals to each pixel unit. It is electrically connected to the gate of the thin-film transistor and driven by a gate driver to control the conduction and cutoff of the thin-film transistor.

[0057] In its implementation, the control module 50 first determines the data lines and scan lines corresponding to the first pixel unit and the second pixel unit, respectively. Then, the control module 50 sends a control command to the gate driver, causing the gate driver to force the gate drive signal on the scan line of the row containing the first and second pixel units to be pulled low to the cutoff level of the thin-film transistor, thereby putting the thin-film transistors corresponding to the first and second pixel units in a cutoff state. Next, the control module 50 sends a control command to the source driver, causing the source driver to set the output terminal of the data line of the column containing the first and second pixel units to a high-impedance state, thus preventing the data lines from writing voltage signals to the first electrode 21 of the first and second pixel units. Through this method, the electrical connection between the first and second pixel units and their corresponding data lines and scan lines is disconnected.

[0058] The display panel of this embodiment includes at least: a first substrate, a second substrate, a first electrode, a second electrode, an electronic ink layer, and a piezoresistive capacitor layer; the first substrate and the second substrate are disposed opposite to each other, and the electronic ink layer is disposed between the first substrate and the second substrate; the first electrode is disposed on the side of the first substrate facing the electronic ink layer; the second electrode is disposed on the side of the second substrate facing the electronic ink layer, and forms a capacitor with the first electrode, and the second electrode is electrically connected to the control module; the piezoresistive capacitor layer is disposed on the side of the second electrode facing the electronic ink layer; the piezoresistive capacitor layer deforms under external pressure, causing the capacitor to generate a capacitance change. In this embodiment, by providing a piezoresistive capacitor layer in the display panel, the control module, after detecting the capacitance change, can determine the pressure value corresponding to the external pressure based on the capacitance change, and when the pressure value is greater than a preset pressure threshold, locate the first pixel unit bearing the external pressure and determine at least one second pixel unit adjacent to the first pixel unit, thereby disconnecting the electrical connection between the first pixel unit and the second pixel unit and their respective data lines and scan lines. Based on this, when the microcapsules inside the first pixel unit rupture and leak electrophoretic fluid due to the large external pressure, since the first pixel unit and the adjacent second pixel unit are in a state of no electrical connection, even if the leaked electrophoretic fluid spreads laterally from the first pixel unit to the second pixel unit, it cannot form a short circuit at the second pixel unit. This avoids the leaked electrophoretic fluid causing short circuits in the pixel electrodes and row / column failures, thus limiting the display defects to a local area.

[0059] Based on the first embodiment of this application, a second embodiment of this application is proposed. In the second embodiment, content that is the same as or similar to that in the first embodiment described above can be referred to the above description and will not be repeated hereafter. Please continue to refer to... Figure 1 .

[0060] In this embodiment, the display panel 10 further includes a microchannel 61.

[0061] The first substrate 11 has a display area and a non-display area located around the display area.

[0062] The microchannel 61 is disposed on the side of the first substrate 11 facing the electronic ink layer 30 and is located in the non-display area.

[0063] It should be noted that the microchannel 61 can be a micro-groove structure disposed on the surface of the first substrate 11, which uses capillary force to direct the leaked electrophoretic liquid along the channel.

[0064] Understandably, the display area can be the area in the display panel 10 used to display images, which contains multiple pixel units.

[0065] It should be noted that the non-display area can be the border area of ​​the display panel 10 located outside the display area, which does not participate in image display.

[0066] The microchannel 61 is used to guide the leaked electrophoretic liquid away from the display area when there is leakage of electrophoretic liquid in the electronic ink layer 30.

[0067] In a specific implementation, when the microcapsules in the electronic ink layer 30 rupture due to external pressure, the electrophoretic liquid leaks from inside the microcapsules to the surface of the first electrode 21. The leaked electrophoretic liquid is drawn into the microchannel 61 under capillary action and flows directionally along the extension direction of the microchannel 61. Since the microchannel 61 is located in a non-display area, the electrophoretic liquid gradually moves away from the display area after flowing along the microchannel 61, thereby guiding the leaked electrophoretic liquid away from the display area, reducing the accumulation of electrophoretic liquid in the display area, and lowering the risk of the electrophoretic liquid forming conductive paths between the pixel electrodes.

[0068] The display panel 10 also includes an absorbent pad 62.

[0069] The absorbent pad 62 is disposed in the non-display area and is connected to the microchannel 61.

[0070] It should be noted that the absorbent pad 62 can be an absorbent structure located at the end of the microchannel 61, which is made of highly absorbent resin material and is used to absorb and lock in liquid.

[0071] The absorbent pad 62 is used to absorb and lock the electrophoretic liquid guided by the microchannel 61.

[0072] In its implementation, the microchannel 61 guides the leaked electrophoretic solution to its end. Since the absorbent pad 62 is located in a non-display area and connected to the end of the microchannel 61, the electrophoretic solution flows along the microchannel 61 to its end and then enters the absorbent pad 62. The absorbent pad 62 can be made of polyacrylate superabsorbent resin to absorb and lock in the non-polar organic solvents in the electrophoretic solution. After entering the absorbent pad 62, the electrophoretic solution is absorbed and locked inside, preventing it from flowing freely inside the display panel 10 and thus avoiding its re-diffusion into the display area. Simultaneously, the absorbent pad 62 creates a continuous negative osmotic pressure after absorbing the electrophoretic solution, further enhancing the suction effect on the electrophoretic solution within the microchannel 61 and promoting its continuous flow towards the absorbent pad 62. This removes the leaked electrophoretic solution from the display panel 10, eliminating the risk of leakage and short circuits caused by residual electrophoretic solution.

[0073] The display panel 10 also includes: a color resist layer 71, a conductive layer 72, and a light-shielding layer 73.

[0074] The color resist layer 71 and the light-shielding layer 73 are disposed on the same layer and on the side of the second substrate 12 near the second electrode 22.

[0075] The color resist layer 71 and the light-shielding layer 73 are arranged alternately along the plane of the display panel 10.

[0076] The conductive layer 72 is disposed on the side of the first substrate 11 near the first electrode 21.

[0077] It should be noted that the color resist layer 71 can be a color filter layer disposed between the second substrate 12 and the second electrode 22, used to filter the incident light into light of different colors to achieve color display.

[0078] Understandably, the conductive layer 72 may be a conductive structure layer disposed between the first substrate 11 and the first electrode 21, used to provide electromagnetic shielding or electrostatic protection.

[0079] It should be noted that the light-shielding layer 73 can be used to block light in the area between adjacent color resist layers 71 to prevent light crosstalk between adjacent pixel units.

[0080] In a specific implementation, the color resist layer 71 is disposed on the side of the second substrate 12 near the second electrode 22, that is, between the second substrate 12 and the second electrode 22. After external light is incident on the second substrate 12, it passes through the color resist layer 71 and is filtered into light of the corresponding color. This colored light shines on the electronic ink layer 30 and is reflected and output, thereby realizing the display of a color image.

[0081] Furthermore, the light-shielding layer 73 and the color resist layer 71 are disposed in the same layer on the side of the second substrate 12 near the second electrode 22, that is, the light-shielding layer 73 and the color resist layer 71 are both located in the same film layer between the second substrate 12 and the second electrode 22. Along the planar direction of the display panel 10, the light-shielding layer 73 and the color resist layer 71 are arranged alternately, with a light-shielding layer 73 disposed between two adjacent color resist layers 71. Each color resist layer 71 corresponds to a pixel unit and is used to filter incident light into light of the corresponding color. The light-shielding layer 73 is disposed between two adjacent color resist layers 71 to block light in the area between the adjacent color resist layers 71, preventing light from passing through the gap between the adjacent color resist layers 71, avoiding a decrease in display contrast caused by light crosstalk between adjacent pixel units, thereby improving the color purity and contrast of the displayed image.

[0082] The conductive layer 72 is disposed on the side of the first substrate 11 near the first electrode 21, that is, between the first substrate 11 and the first electrode 21. The conductive layer 72 covers the surface of the first substrate 11 and is used to shield external electromagnetic interference to prevent external electromagnetic signals from interfering with the internal driving signals of the display panel 10. At the same time, it is used to conduct away the static charge accumulated on the surface of the first substrate 11 to avoid electrostatic discharge from damaging the internal components of the display panel 10.

[0083] It should be understood that when the display panel has the aforementioned conductive layer 72, the microchannel 61 is disposed on the side of the conductive layer 72 facing the electronic ink layer 30.

[0084] In this embodiment, refer to Figure 1 The display panel 10 further includes: sealing adhesive 80.

[0085] The sealing adhesive 80 is disposed between the first substrate 11 and the second substrate 12, and is located in the non-display area.

[0086] The sealing adhesive 80 is used to bond the first substrate 11 and the second substrate 12.

[0087] It should be noted that the sealing adhesive 80 can be a sealing adhesive material disposed between the first substrate 11 and the second substrate 12, used to bond and fix the first substrate 11 and the second substrate 12, and at the same time seal the edge of the display panel 10.

[0088] Understandably, the sealing adhesive 80 extends along the edge of the display panel 10 and surrounds the display area. That is, the sealing adhesive 80 is continuously distributed on all four sides (including the left, right, top, and bottom) of the display panel 10, forming a closed annular sealing structure. Figure 1 The location of the sealing adhesive 80 shown is for illustrative purposes only and is not intended to limit this embodiment.

[0089] For example, refer to Figure 2, Figure 2 This is a top view of the display panel of this application. Figure 2 It is mainly used to illustrate the planar layout relationship between the pixel units and the microchannels 61 in the display panel 10. Figure 2 In the diagram, A represents a pixel unit. Multiple pixel units are arranged in an array within the display area. Microchannels 61 are located in the non-display area surrounding the display area, forming a continuous or intermittent ring pattern around the perimeter. A liquid-absorbing pad 62 surrounds and communicates with the microchannels 61; the electrophoretic solution flows along the microchannels 61 to its end and then enters the liquid-absorbing pad 62. A sealant 80 extends along the edge of the display panel 10 and surrounds the liquid-absorbing pad 62. The first substrate 11 is surrounded by the sealant 80.

[0090] In a specific implementation, the sealing adhesive 80 is disposed in the non-display area between the first substrate 11 and the second substrate 12. The sealing adhesive 80 extends along the edge of the display panel 10 and surrounds the display area. The sealing adhesive 80 is bonded to both the first substrate 11 and the second substrate 12, thereby fixing the first substrate 11 and the second substrate 12 into a single structure. Simultaneously, the sealing adhesive 80 forms a sealing structure at the edge of the display panel 10, sealing the electronic ink layer 30 between the first substrate 11 and the second substrate 12, preventing external moisture or impurities from entering the electronic ink layer 30, thereby ensuring the stability of the display performance of the electronic ink layer 30 and extending the lifespan of the display panel 10.

[0091] This application also proposes an electronic paper, referring to... Figure 3 , Figure 3 This is a schematic diagram of the electronic paper structure of this application. The electronic paper includes: a control module 50 and a display panel 10 as described in the above embodiment.

[0092] The control module 50 is used to detect the capacitance change of the capacitor in the display panel 10. The capacitance change is caused by the deformation of the pressure-sensitive capacitor layer 40 in the display panel 10 under external pressure.

[0093] The control module 50 is also used to determine the pressure value corresponding to the external pressure based on the change in capacitance.

[0094] The control module 50 is further configured to locate the first pixel unit in the display panel 10 that bears the external pressure, and at least one second pixel unit adjacent to the first pixel unit, when the pressure value is greater than a preset pressure threshold.

[0095] The control module 50 is also used to disconnect the electrical connection between the first pixel unit and the second pixel unit and their respective data lines and scan lines.

[0096] It should be noted that the control module 50 involved in the above-described electronic paper embodiment is implemented in the same way as the control module 50 involved in the above-described display panel 10 embodiment. Refer to the relevant description in the above-described display panel 10 embodiment; further details will not be repeated here. Since the electronic paper provided in this embodiment, including the display panel 10 described in the above-described embodiment, can also solve the technical problem of pixel electrode short circuits and row / column failures caused by external pressure, it can also achieve the beneficial effects of the display panel 10 provided in the above-described embodiment.

[0097] Furthermore, in this embodiment, the control module 50 is also used to determine that at least a portion of the pixel units surrounding the second pixel unit are compensation pixel units when the first pixel unit and the second pixel unit are in an electrically disconnected state.

[0098] It should be noted that the compensation pixel unit can be a pixel unit located outside the second pixel unit and not disconnected from the electrical connection. It is used to generate an edge electric field by applying a compensation driving voltage after the first pixel unit and the second pixel unit are disconnected from the electrical connection, so as to cover the area where the first pixel unit and the second pixel unit are located.

[0099] In its implementation, after disconnecting the electrical connections between the first pixel unit and the second pixel unit and their respective data lines and scan lines, the control module 50, using the second pixel unit as a reference, determines at least a portion of the pixel units located around the second pixel unit as compensation pixel units. The compensation pixel units are relative to the first and second pixel units; they are located outside the area formed by the first and second pixel units, and their corresponding data lines and scan lines are not disconnected, allowing them to receive drive signals normally.

[0100] For example, for ease of understanding, refer to Figure 4 , Figure 4 This is a schematic diagram of the distribution of elemental cells in the electronic paper of this application. Figure 4 In the diagram, B is the pixel unit located at the very center, C is any pixel unit surrounding A, D is any pixel unit surrounding C, and E is any other pixel unit besides A, B, C, and D. Taking A as the first pixel unit as an example, B can then be used as the second pixel unit, and C can be selected as the compensation pixel unit.

[0101] The control module 50 is further configured to apply a compensation driving voltage to the compensation pixel unit, so that the electric field generated by the compensation pixel unit covers the area where the first pixel unit and the second pixel unit are located, thereby driving the charged particles in the unruptured microcapsules in the second pixel unit covered by the electric field to undergo directional migration.

[0102] It should be noted that the compensation driving voltage can be a driving voltage applied to the compensation pixel unit, with an amplitude different from that of the driving voltage during normal display. This voltage is used to generate an outwardly expanding electric field within the compensation pixel unit. This electric field bends outward from the electrode edge of the compensation pixel unit, covering the area where adjacent pixel units are located.

[0103] In its implementation, after determining the compensation pixel unit, the control module 50 applies a compensation driving voltage to the compensation pixel unit. When the compensation driving voltage is applied between the first electrode 21 and the second electrode 22 of the compensation pixel unit, an electric field is formed at the compensation pixel unit. Because the compensation driving voltage increases the voltage difference between the first electrode 21 and the second electrode 22 of the compensation pixel unit, the electric field lines bend outwards from the electrode edges of the compensation pixel unit, extending and covering the area where the first and second pixel units are located. If the microcapsules inside the second pixel unit located within the area of ​​the first and second pixel units are intact, the electric field formed by the compensation pixel unit can drive the charged particles in the intact microcapsules to migrate in a directed manner, causing the intact microcapsules to present a display state matching that of the compensation pixel unit. This visually compensates for the display defects caused by the microcapsule rupture in the first pixel unit, making the area where the first and second pixel units are located visually continuous and consistent with the surrounding display area, thus preventing the human eye from perceiving display abnormalities.

[0104] In one feasible implementation, refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of the control module in the electronic paper embodiment of this application. The control module 50 includes: a signal generator 51, a detection circuit 52, and a processor 53.

[0105] The signal generator 51 is connected to the second electrode 22, and the detection circuit 52 is connected to the data line and the processor 53.

[0106] It should be noted that the signal generator 51 can be a circuit that outputs a detection signal. The detection circuit 52 can be a circuit that receives and processes the response signal. The processor 53 can be a unit that performs data operations and logical judgments.

[0107] The signal generator 51 is used to apply a detection signal to the second electrode 22 of the display panel 10. The detection signal is coupled to the first electrode via the equivalent capacitance between the first electrode and the second electrode in the display panel 10, and generates a response signal on the data line electrically connected to the first electrode 21.

[0108] In the specific implementation, the frequency of the detection signal generated by the signal generator 51 is much higher than the display refresh frequency, and its voltage amplitude is less than the driving threshold voltage of the charged particles in the microcapsule. Therefore, the application of the detection signal will not affect the normal display grayscale of the electronic paper, nor will it interfere with the normal movement of the charged particles.

[0109] The signal generator 51 applies the generated detection signal to the second electrode 22. Since the pixel cell gate is off and the pixel electrode is floating during detection, the detection signal cannot flow directly through the data line. Instead, it is coupled via a capacitor between the first electrode 21 and the second electrode 22. This capacitor is composed of the first electrode 21, the second electrode 22, and a dielectric layer sandwiched between them. The dielectric layer includes an electronic ink layer 30 and a varistor layer 40. After the detection signal is coupled to the first electrode 21 via this capacitor, an induced voltage is generated on the first electrode 21. Because the first electrode 21 is coupled to the data line through the parasitic capacitance of the thin-film transistor, this induced voltage is further coupled to the data line electrically connected to the first electrode 21, thereby generating a response signal on the data line.

[0110] The detection circuit 52 is used to receive the response signal and determine the corresponding digital voltage signal based on the response signal.

[0111] It should be noted that a digital voltage signal can be a voltage value in digital form.

[0112] In the specific implementation, the detection circuit 52 receives the response signal generated on the data line and performs signal processing on the response signal to obtain a digital voltage signal.

[0113] In one feasible implementation, the detection circuit 52 includes: a voltage conversion circuit 521, a bandpass filter circuit 522, a phase-sensitive detector circuit 523, a low-pass filter circuit 524, and an analog-to-digital converter 525.

[0114] The bandpass filter circuit 522 is connected to the voltage conversion circuit 521 and the phase-sensitive detector circuit 523 respectively. The voltage conversion circuit 521 is connected to the data line. The low-pass filter circuit 524 is connected to the phase-sensitive detector circuit 523 and the analog-to-digital converter 525 respectively. The phase-sensitive detector circuit 523 is connected to the signal generator 51. The analog-to-digital converter 525 is also connected to the processor 53.

[0115] It should be noted that the voltage conversion circuit 521 can be a circuit that receives a response signal and converts it into a voltage signal.

[0116] Understandably, the bandpass filter circuit 522 can be a filter circuit that allows signals within a specific frequency range to pass through and attenuates signals outside that frequency range. It can be used to extract effective frequency components from voltage signals and filter out noise components.

[0117] It should be noted that the phase-sensitive detection circuit 523 can be a circuit that performs phase-sensitive detection on the input signal.

[0118] Understandably, the low-pass filter circuit 524 can be a filter circuit that allows low-frequency signals to pass through while attenuating high-frequency signals.

[0119] It should be noted that the analog-to-digital converter 525 can be a converter that converts analog signals into digital signals.

[0120] The voltage conversion circuit 521 is used to receive the response signal and convert the response signal into a voltage signal.

[0121] In its implementation, the voltage conversion circuit 521 receives the response signal generated on the data line. The voltage conversion circuit 521 may include a transimpedance amplifier. After the response signal is input through the transimpedance amplifier, it flows through the feedback resistor in the amplifier, generating a voltage drop across the feedback resistor. This voltage drop is the voltage signal corresponding to the response signal. Since the response signal is a weak current signal, converting it into a voltage signal through the transimpedance amplifier facilitates subsequent circuitry for signal filtering, demodulation, and analog-to-digital conversion.

[0122] The bandpass filter circuit 522 is used to filter out noise components in the voltage signal.

[0123] In its implementation, the bandpass filter circuit 522 receives the voltage signal output by the voltage conversion circuit 521. The center frequency of the bandpass filter circuit 522 is set to the frequency of the detection signal. Since the voltage signal contains noise components such as low-frequency noise introduced by the display driver, high-frequency harmonics, and switching interference, and these noise components have frequencies different from the detection signal frequency, the bandpass filter circuit 522 utilizes its passband characteristics to allow signal components with frequencies within its passband (i.e., components with frequencies equal to the detection signal frequency) to pass through, while noise components with frequencies outside its passband are attenuated. Through this processing, the bandpass filter circuit 522 filters out noise components from the voltage signal, extracts the effective frequency component centered on the detection signal frequency, and outputs the filtered voltage signal to the phase-sensitive detector circuit 523, providing a signal basis for subsequent signal demodulation.

[0124] The phase-sensitive detector circuit 523 is used to perform phase-locked demodulation on the filtered voltage signal using the detection signal as a reference signal, and output a mixed signal containing DC and AC components.

[0125] In its implementation, the phase-sensitive detector circuit 523 receives the filtered voltage signal output from the bandpass filter circuit 522. The phase-sensitive detector circuit 523 also receives the detection signal output from the signal generator 51, using this detection signal as a reference signal. The phase-sensitive detector circuit 523 multiplies the filtered voltage signal with the reference signal. Components in the filtered voltage signal with the same frequency and phase as the reference signal are converted into DC components after multiplication, while components in the filtered voltage signal with different frequencies or phases than the reference signal are converted into AC components after multiplication. The amplitude of the DC component is proportional to the amplitude of the components with the same frequency and phase in the filtered voltage signal, reflecting the amplitude change of the detection signal after capacitor coupling. The phase-sensitive detector circuit 523 mixes and outputs the DC and AC components, resulting in a mixed signal containing both DC and AC components.

[0126] The low-pass filter circuit 524 is used to filter out the AC component in the mixed signal and output a DC voltage signal corresponding to the capacitance value of the capacitor.

[0127] In its implementation, the low-pass filter circuit 524 receives the mixed signal output from the phase-sensitive detector circuit 523. The mixed signal contains both DC and AC components. The DC component reflects the amplitude information of the signal with the same frequency and phase as the detected signal, and this amplitude information is related to the capacitance value of the capacitor. The AC component consists of other components with a different frequency or phase than the reference signal. The cutoff frequency of the low-pass filter circuit 524 is set lower than the frequency of the detected signal, allowing the DC component to pass through while attenuating AC components with frequencies higher than its cutoff frequency. After processing by the low-pass filter circuit 524, the AC component in the mixed signal is filtered out, and the DC component is retained and output as a DC voltage signal to the analog-to-digital converter 525. The voltage value of the DC voltage signal output by the low-pass filter circuit 524 corresponds to the capacitance value of the capacitor, which is related to the magnitude of the external pressure. Therefore, the voltage value of the DC voltage signal indirectly reflects the magnitude of the external pressure.

[0128] The analog-to-digital converter 525 is used to convert the DC voltage signal into a digital voltage signal.

[0129] In its implementation, the analog-to-digital converter 525 receives the DC voltage signal output by the low-pass filter circuit 524, which is an analog voltage signal. The analog-to-digital converter 525 samples the DC voltage signal according to a preset sampling frequency and converts each sampled analog voltage value into a corresponding digital quantity, thereby converting the analog DC voltage signal into a digital voltage signal.

[0130] The processor 53 is configured to determine the capacitance change of the capacitor based on the digital voltage signal.

[0131] In its implementation, the processor 53 receives the digital voltage signal output by the analog-to-digital converter 525. The processor 53 determines the corresponding voltage value based on the digital voltage signal; this voltage value is the digital quantity obtained by analog-to-digital conversion of the DC voltage signal output by the low-pass filter circuit 524. Since the DC voltage signal corresponds to the capacitance value of a capacitor, the voltage value corresponding to the digital voltage signal indirectly reflects the capacitance value of the capacitor. The processor 53 compares the voltage value corresponding to the digital voltage signal with a pre-stored reference voltage value, which is the voltage value corresponding to the DC voltage signal output by the low-pass filter circuit 524 when no external pressure is applied. The processor 53 calculates the difference between the voltage value corresponding to the digital voltage signal and the reference voltage value; this difference is the voltage change of the DC voltage signal.

[0132] Furthermore, the processor 53 can invoke the following preset formula for capacitance change:

[0133] In the formula, This represents the change in capacitance of the capacitor. This represents the voltage change of a DC voltage signal. To detect the amplitude of the signal, To detect the frequency of the signal, This refers to the gain coefficient of the voltage conversion circuit 521 when it converts the response signal into a voltage signal. This is the cascaded gain coefficient of the bandpass filter circuit 522, the phase-sensitive detector circuit 523, and the low-pass filter circuit 524.

[0134] The amplitude and frequency of the detection signal are known parameters preset when the signal generator 51 outputs the detection signal. The gain coefficient and cascaded gain coefficient are both pre-stored in the processor 53. The processor 53 substitutes the acquired voltage change and other parameters in the preset capacitance change formula to obtain the capacitance change corresponding to the voltage change.

[0135] It should be understood that the signal generator 51 outputs a detection signal, which, after being coupled by a capacitor, generates a response signal on the data line. The detection circuit 52 receives the response signal and performs conversion, filtering, phase-locked demodulation, and analog-to-digital conversion processing, outputting a digital voltage signal to the processor 53. The processor 53 determines the capacitance change based on the digital voltage signal. Because the detection circuit 52 uses phase-locked demodulation to extract components with the same frequency and phase as the detection signal, it can extract effective components from the noisy response signal, avoiding interference from noise components in the capacitance change determination process. This improves the accuracy of capacitance change determination, making the subsequent determination of the pressure value corresponding to the external pressure based on the capacitance change more accurate.

[0136] This application also provides a control method based on the electronic paper described above, referring to... Figure 6 , Figure 6 This is a flowchart illustrating the control method for electronic paper according to this application. The control method is executed by the control module 50 of the electronic paper and includes steps S10 to S40: Step S10: Detect the capacitance change of the capacitor in the display panel 10. The capacitance change is caused by the deformation of the varistor layer 40 in the display panel 10 under external pressure.

[0137] Step S20: Determine the pressure value corresponding to the external pressure based on the change in capacitance.

[0138] Step S30: When the pressure value is greater than a preset pressure threshold, locate the first pixel unit in the display panel 10 that bears the external pressure, and at least one second pixel unit adjacent to the first pixel unit.

[0139] Step S40: Disconnect the electrical connections between the first pixel unit and the second pixel unit and their respective data lines and scan lines.

[0140] The control method provided in this application, based on the electronic paper described above, can solve the technical problem of pixel electrode short circuits and row / column failures caused by external pressure on the display panel 10. Compared with the prior art, the beneficial effects of the control method provided in this application are the same as those of the electronic paper or display panel 10 provided in the above embodiments, and other technical features in this control method are the same as those disclosed in the methods of the above-described electronic paper or display panel 10 embodiments, and will not be repeated here.

[0141] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A display panel, characterized by, The display panel includes at least: a first substrate, a second substrate, a first electrode, a second electrode, an electronic ink layer, and a varistor layer; The first substrate and the second substrate are disposed opposite to each other, and the electronic ink layer is disposed between the first substrate and the second substrate; The first electrode is disposed on the side of the first substrate facing the electronic ink layer; The second electrode is disposed on the side of the second substrate facing the electronic ink layer and forms a capacitor with the first electrode. The second electrode is electrically connected to the control module. The varistor layer is disposed on the side of the second electrode facing the electronic ink layer; The pressure-sensitive capacitor layer is used to deform under external pressure, so that the capacitor produces a change in capacitance. The control module is used to detect the change in capacitance and determine the pressure value corresponding to the external pressure based on the change in capacitance. The control module is also used to locate the first pixel unit that bears the external pressure when the pressure value is greater than the preset pressure threshold, and to determine at least one second pixel unit adjacent to the first pixel unit. The control module is also used to disconnect the electrical connection between the first pixel unit and the second pixel unit and their respective data lines and scan lines.

2. The display panel of claim 1, wherein, The display panel further includes: microchannels; The first substrate has a display area and a non-display area located around the display area; The microchannel is disposed on the side of the first substrate facing the electronic ink layer and is located in the non-display area; The microchannel is used to guide the leaked electrophoretic solution away from the display area when there is leakage of the electrophoretic solution in the electronic ink layer.

3. The display panel of claim 2, wherein, The display panel also includes: an absorbent pad; The absorbent pad is disposed in the non-display area and is connected to the microchannel; The absorbent pad is used to absorb and lock in the electrophoretic solution guided by the microchannel.

4. The display panel of claim 1, wherein, The display panel also includes: a color resist layer, a conductive layer, and a light-shielding layer; The color resist layer and the light-shielding layer are disposed on the same layer and on the side of the second substrate near the second electrode; The color resist layer and the light-shielding layer are arranged alternately along the plane of the display panel; The conductive layer is disposed on the side of the first substrate near the first electrode.

5. The display panel of claim 1, wherein, The display panel also includes: frame sealant; The sealing adhesive is disposed between the first substrate and the second substrate, and is located in the non-display area; The sealing adhesive is used to bond the first substrate and the second substrate.

6. An electronic paper, characterized by comprising: The electronic paper includes: a control module and a display panel as described in any one of claims 1 to 5; The control module is connected to the display panel; The control module is used to detect the capacitance change of the capacitor in the display panel. The capacitance change is caused by the deformation of the varistor layer in the display panel under external pressure. The control module is also used to determine the pressure value corresponding to the external pressure based on the change in capacitance; The control module is also used to locate the first pixel unit in the display panel that bears the external pressure and at least one second pixel unit adjacent to the first pixel unit when the pressure value is greater than a preset pressure threshold. The control module is also used to disconnect the electrical connection between the first pixel unit and the second pixel unit and their respective data lines and scan lines.

7. The electronic paper as described in claim 6, characterized in that, The control module is further configured to determine that at least a portion of the pixel units surrounding the second pixel unit are compensation pixel units when the first pixel unit and the second pixel unit are in an electrically disconnected state. The control module is further configured to apply a compensation driving voltage to the compensation pixel unit, so that the electric field generated by the compensation pixel unit covers the area where the first pixel unit and the second pixel unit are located, thereby driving the charged particles in the unruptured microcapsules in the second pixel unit covered by the electric field to undergo directional migration.

8. The electronic paper as described in claim 6, characterized in that, The control module includes: a signal generator, a detection circuit, and a processor; The signal generator is connected to the second electrode, and the detection circuit is connected to the data line and the processor. The signal generator is used to apply a detection signal to the second electrode of the display panel. The detection signal is coupled to the first electrode via the equivalent capacitance between the first electrode and the second electrode in the display panel, and generates a response signal on the data line electrically connected to the first electrode. The detection circuit is used to receive the response signal and determine the corresponding digital voltage signal based on the response signal; The processor is configured to determine the capacitance change of the capacitor based on the digital voltage signal.

9. The electronic paper as described in claim 8, characterized in that, The detection circuit includes: a voltage conversion circuit, a bandpass filter circuit, a phase-sensitive detector circuit, a low-pass filter circuit, and an analog-to-digital converter; The bandpass filter circuit is connected to the voltage conversion circuit and the phase-sensitive detector circuit respectively. The voltage conversion circuit is connected to the data line. The low-pass filter circuit is connected to the phase-sensitive detector circuit and the analog-to-digital converter respectively. The phase-sensitive detector circuit is connected to the signal generator. The analog-to-digital converter is also connected to the processor. The voltage conversion circuit is used to receive the response signal and convert the response signal into a voltage signal; The bandpass filter circuit is used to filter out noise components in the voltage signal; The phase-sensitive detection circuit is used to perform phase-locked demodulation on the filtered voltage signal using the detection signal as a reference signal, and output a mixed signal containing DC and AC components. The low-pass filter circuit is used to filter out the AC component in the mixed signal and output a DC voltage signal corresponding to the capacitance value of the capacitor. The analog-to-digital converter is used to convert the DC voltage signal into a digital voltage signal.

10. A control method for electronic paper based on any one of claims 6 to 9, characterized in that, The control method includes: The capacitance change of the capacitor in the display panel is detected. The capacitance change is caused by the deformation of the varistor layer in the display panel under external pressure. The pressure value corresponding to the external pressure is determined based on the change in capacitance. When the pressure value is greater than a preset pressure threshold, the first pixel unit in the display panel that bears the external pressure, and at least one second pixel unit adjacent to the first pixel unit are located. Disconnect the electrical connections between the first pixel unit and the second pixel unit and their respective data lines and scan lines.

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