A display panel and display device

Abstract

This invention discloses a display panel and a display device. The display panel includes: a driving backplane; a shared electrode layer located on one side of the driving backplane; an active light-emitting layer and a first electrode layer; the active light-emitting layer is located on the side of the shared electrode layer away from the driving backplane, and the first electrode layer is located on the side of the active light-emitting layer away from the driving backplane; the shared electrode layer and the first electrode layer are used to supply power to the active light-emitting layer; an encapsulation layer is located on the side of the first electrode layer away from the driving backplane, and is used to encapsulate the active light-emitting layer and the first electrode layer; a passive display layer and a second electrode layer; the passive display layer is located on the side of the encapsulation layer away from the driving backplane, and the second electrode layer is located on the side of the passive display layer away from the driving backplane; the shared electrode layer and the second electrode layer are used to provide a first electric field to the passive display layer, thereby reducing the power consumption of the display panel.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display panel and a display device. Background Technology

[0002] Electronic paper, also known as digital paper, can retain its original image even after power is lost. It features low power consumption and foldable / bendable functionality, and is widely used in e-books, electronic price tags, and other fields.

[0003] However, most commonly used display screens currently employ self-emissive organic electroluminescent devices, which often need to display special shapes of images for extended periods, such as lock screen images; in such cases, self-emissive display devices may consume excessive power. Summary of the Invention

[0004] This invention provides a display panel and a display device to reduce the power consumption of the display device.

[0005] According to one aspect of the present invention, a display panel is provided, comprising:

[0006] Drive backplane;

[0007] A shared electrode layer is located on one side of the drive backplate, and the shared electrode layer includes a plurality of shared electrodes spaced apart.

[0008] An active light-emitting layer and a first electrode layer; the active light-emitting layer is located on the side of the shared electrode layer away from the driving backplane, and the first electrode layer is located on the side of the active light-emitting layer away from the driving backplane; the shared electrode layer and the first electrode layer are used to supply power to the active light-emitting layer;

[0009] An encapsulation layer is located on the side of the first electrode layer away from the driving backplate, and the encapsulation layer is used to encapsulate the active light-emitting layer and the first electrode layer;

[0010] A passive display layer and a second electrode layer; the passive display layer is located on the side of the encapsulation layer away from the driving backplane, and the second electrode layer is located on the side of the passive display layer away from the driving backplane; the shared electrode layer and the second electrode layer are used to provide a first electric field for the passive display layer.

[0011] Optionally, each shared electrode, along with the active light-emitting layer and the first electrode layer located on one side of the shared electrode, constitutes an active light-emitting unit; each shared electrode, along with the passive display layer and the second electrode layer located on one side of the shared electrode, constitutes a passive display unit.

[0012] The passive display layer can be reused as a filter layer for the active light-emitting layer, and each passive display unit is used as a filter unit for an active light-emitting unit that shares the same common electrode.

[0013] Optionally, the display panel further includes a touch layer; the second electrode layer is reused as a touch electrode layer in the touch layer;

[0014] The active light-emitting layer includes organic light-emitting materials and / or quantum dots; the passive display layer includes an electrophoretic display layer or an electrowetting display layer.

[0015] Optionally, when the passive display layer is an electrowetting display layer, the passive display layer includes a hydrophobic layer and a first electrowetting ink layer; the hydrophobic layer is located on the side of the first electrowetting ink layer near the driving backplate;

[0016] The first electrowetting ink layer includes water, multiple colored oil films immersed in water, and spacers for separating adjacent colored oil films of two different colors; when the passive display layer is reused as the filter layer of the active light-emitting layer, the second electrode layer is not powered.

[0017] The encapsulation layer is reused as the hydrophobic layer.

[0018] When the passive display layer is an electrophoretic display layer, the passive display layer includes:

[0019] Multiple cavities, each cavity being filled with an electrophoretic solution containing charged ink particles of a single color; wherein the color of the charged ink particles is a filter color;

[0020] Multiple vertical electrode pairs, each vertical electrode pair including a first vertical electrode and a second vertical electrode; each cavity is located between the first vertical electrode and the second vertical electrode of a vertical electrode pair; the first vertical electrode and the second vertical electrode are used to provide a second electric field to the charged ink particles;

[0021] When the passive display layer is reused as the filter layer of the active light-emitting layer, the charged ink particles are located at the top of the cavity under the action of the first electric field;

[0022] When the passive display layer is used for display, in the displayed cavity, the charged ink particles are located at the top of the cavity under the action of the first electric field; in the non-display cavity, the charged ink particles are located on the side of the cavity under the action of the second electric field.

[0023] Optionally, when the passive display layer is an electrophoretic display layer, the passive display layer includes:

[0024] Multiple cavities, each cavity being filled with an electrophoretic solution containing charged ink particles of at least two colors; wherein, some of the charged ink particles are of a filter color, and some of the charged ink particles are of a non-filter color;

[0025] Multiple vertical electrode pairs, each vertical electrode pair including a first vertical electrode and a second vertical electrode; each cavity is located between the first vertical electrode and the second vertical electrode of a vertical electrode pair; when the passive display layer is reused as the filter layer of the active light-emitting layer, the first vertical electrode and the second vertical electrode are used to provide a second electric field to the charged ink particles; under the combined action of the first electric field and the second electric field, the filter-colored charged ink particles cover at least a portion of the top region of the cavity, and the vertical projection of the filter-colored charged ink particles at the top of the cavity onto the bottom of the cavity does not overlap with at least a portion of the region where the non-filter-colored charged ink particles are located at the bottom of the cavity.

[0026] Optionally, one side of the driving backplate further includes a pixel definition layer, the pixel definition layer including multiple openings, the openings being configured one-to-one with the shared electrodes and exposing a portion of the shared electrodes, the active light-emitting layer being located in the openings;

[0027] The vertical projection area of ​​the opening on the shared electrode is smaller than the vertical projection area of ​​the cavity on the shared electrode.

[0028] Optionally, when the passive display layer is an electrophoretic display layer, the passive display layer includes:

[0029] Multiple cavities, each cavity being filled with an electrophoretic solution containing charged and uncharged ink particles; wherein the color of the uncharged ink particles is a filter color;

[0030] Multiple vertical electrode pairs are provided, each vertical electrode pair including a first vertical electrode and a second vertical electrode; each cavity is located between the first and second vertical electrodes of a vertical electrode pair; when the passive display layer is reused as the filter layer of the active light-emitting layer, the first and second vertical electrodes are used to provide a second electric field to the charged ink particles, so as to drive the charged ink particles to the side of the cavity, and filter the light through the uncharged ink particles of the filter color.

[0031] Optionally, two adjacent cavities share a vertical electrode; the first vertical electrode and the second vertical electrode are alternately arranged in sequence; the cavity includes a microcapsule or a microcup.

[0032] According to another aspect of the present invention, a display device is provided, comprising the display panel described in any embodiment of the present invention.

[0033] The technical solution provided by this invention, by sequentially arranging a shared electrode, an active light-emitting layer, and a first electrode layer on one side of the driving backplate, can form an active display panel with better display effect and higher refresh rate. On the side of the encapsulation layer away from the driving backplate, a passive display layer and a second electrode layer are sequentially arranged, and the shared electrode layer is reused as one of the two electrode layers providing the electric field to the passive display layer, thereby forming a passive display panel with lower power consumption. This achieves two display methods. When it is necessary to display special shaped images for a long time, such as lock screen images, a low-power passive display layer can be used, thereby reducing the power consumption of the display device. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0040] Figure 7 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0042] Figure 9 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0043] Figure 10 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0044] Figure 11 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0045] Figure 12This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0046] Figure 13 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0047] Figure 14 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0048] Figure 15 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0049] Figure 16 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0050] Figure 17 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Detailed Implementation

[0051] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0052] This invention provides a display panel. Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, for reference. Figures 1-2 The display panel includes:

[0053] Drive backplane 10;

[0054] A shared electrode layer is located on one side of the drive backplate 10, and the shared electrode layer includes a plurality of shared electrodes 20 spaced apart.

[0055] An active light-emitting layer 30 and a first electrode layer 40 are provided; the active light-emitting layer 30 is located on the side of the shared electrode layer away from the driving backplate 10, and the first electrode layer 40 is located on the side of the active light-emitting layer 30 away from the driving backplate 10; the shared electrode layer and the first electrode layer 40 are used to supply power to the active light-emitting layer 30.

[0056] Encapsulation layer 50 is located on the side of the first electrode layer 40 away from the driving backplate 10. Encapsulation layer 50 is used to encapsulate the active light-emitting layer 30 and the first electrode layer 40.

[0057] Passive display layer 60 and second electrode layer 70; passive display layer 60 is located on the side of encapsulation layer 50 away from driving backplane 10, and second electrode layer 70 is located on the side of passive display layer 60 away from driving backplane 10; shared electrode layer and second electrode layer 70 are used to provide a first electric field for passive display layer 60; passive display layer 60 can be reused as a filter layer of active light emission layer 30.

[0058] Specifically, the driving backplate 10 refers to a film structure that provides driving signals to the display panel and serves as a buffer, protector, or support. A patterned shared electrode layer is disposed on one side of the driving backplate 10, and this patterned shared electrode layer contains multiple spaced-apart shared electrodes 20. The material of the shared electrodes 20 may include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or indium oxide (In2O3), etc.

[0059] The active light-emitting layer 30 is located on the side of the shared electrode layer away from the driving backplate 10. The active light-emitting layer 30 can be formed, for example, from a low-molecular-weight organic material or a high-molecular-weight organic material. In addition to the organic emitting layer, the active light-emitting layer 30 can include various other functional layers. In one embodiment, a pixel defining layer (PDL) may also be included, located on one side of the driving backplate 10. The pixel defining layer includes a plurality of openings exposing the shared electrode 20, and the active light-emitting layer 30 is located in the openings, thereby defining the emission region of each sub-pixel. The PDL can be formed from organic materials such as polyimide (PI), polyamide, benzocyclobutene (BCB), acrylic resin, or phenolic resin.

[0060] The first electrode layer 40 is located on the active light-emitting layer 30. The material of the first electrode layer 40 may include Ag, magnesium (Mg), Al, Pt, Pd, Au, Ni, Nd, iridium (Ir), Cr, or mixtures thereof. If a voltage is applied to the first electrode layer 40 and the shared electrode layer, the active light-emitting layer 30 located between the first electrode layer 40 and the shared electrode layer can emit visible light under the excitation of an electrical signal, thereby realizing an image that can be recognized by the user. The encapsulation layer 50 is located on the organic light-emitting structure. The encapsulation layer 50 protects the active light-emitting layer 30 and other thin layers from the effects of external moisture and oxygen. The encapsulation layer 50 may include inorganic and organic layers, which are stacked alternately. The driving backplate 10 and the shared electrode 20, active light-emitting layer 30, and first electrode layer 40 located on the driving backplate 10 can form an active display panel with good display effect and high refresh rate. The light emission direction of the active display panel is the direction from the active light-emitting layer 30 to the first electrode layer 40.

[0061] The passive display layer 60 is located on the side of the encapsulation layer 50 away from the driving backplane 10. The passive display layer 60 cannot emit light independently and requires reflected ambient light for display. (Reference) Figure 1The passive display layer 60 may contain tens of thousands of tiny charged ink particles 64. These charged ink particles 64 can be distributed in a transparent or colored base liquid to form a suspension system. Each ink particle 501 has a diameter of approximately 100 μm and its surface easily adsorbs charges to form electron particles. The second electrode layer 70 is located on the side of the passive display layer 60 away from the driving backplate 10. The shared electrode layer and the second electrode layer 70 are used to provide a first electric field for the passive display layer 60. These charge-sensitive particles can move under the action of the applied electric field, thereby realizing the transformation of text and images. (Reference) Figure 2 and Figure 3 The passive display layer 60 may also contain tens of thousands of tiny oil films 621 distributed in water. The shared electrode layer and the second electrode layer 70 provide a first electric field to the passive display layer 60. This first electric field controls the flattening and aggregation of the oil films 621, thereby enabling the transformation of text and images. The driving backplate 10, along with the shared electrode layer, the passive display layer 60, and the second electrode layer 70 on the driving backplate 10, can form a low-power passive display panel. The material of the second electrode layer 70 is transparent, allowing ambient light to enter the passive display layer 60 and reflect it back out, thus achieving display.

[0062] In other words, a passive display panel is set on the light-emitting surface of a conventional active-matrix display panel. The passive display panel shares the driving backplane 10 and an electrode layer from the active-matrix display panel. The control of whether to use conventional or passive display (e.g., electrophoretic display) is achieved through timing or time-division multiplexing. When displaying special-shaped images for extended periods, such as lock screen images, a low-power passive display layer can be used, thereby reducing the power consumption of the display device. Furthermore, the passive display panel provides anti-static properties, enhancing the ESD resistance of the active-matrix display panel. This can be understood as the second electrode layer 70 in the passive display panel forming a capacitor structure with the first electrode layer 40, effectively connecting a capacitor in parallel with the screen of the active-matrix display panel. This increases the overall capacitance, enhancing the ESD resistance of the active-matrix display panel and thus strengthening its anti-static capabilities.

[0063] The display panel provided in this embodiment of the invention, by sequentially arranging a shared electrode, an active light-emitting layer, and a first electrode layer on one side of a driving backplate, can form an active display panel with good display effect and high refresh rate. On the side of the encapsulation layer away from the driving backplate, a passive display layer and a second electrode layer are sequentially arranged, and the shared electrode layer is reused as one of the two electrode layers providing the electric field to the passive display layer, thereby forming a passive display panel with low power consumption. While achieving two display modes, the overall thickness of the display panel is reduced due to the shared driving backplate and one electrode layer. When displaying special-shaped images for extended periods, such as lock screen images, a low-power passive display layer can be used, thereby reducing the power consumption of the display device.

[0064] As one embodiment of the present invention, please continue to refer to Figures 1-2 Optionally, the active light-emitting layer 30 includes an organic light-emitting material sublayer, a driving backplate 10, and an active light-emitting layer 30, a first electrode layer 40, and an encapsulation layer 50 on the driving backplate 10 to form an OLED (Organic Light-Emitting Diode) display panel.

[0065] Specifically, OLED display panels possess self-emissive properties. As a next-generation display technology, OLED display panels offer superior display performance compared to LCDs, boasting advantages such as excellent display quality, low power consumption, high flexibility, and ultra-thinness. OLED materials are the core component of OLED display panels, determining their performance. An organic light-emitting material sublayer (OLED material) is placed between two electrode layers, forming a sandwich-like structure, and is positioned on the driving backplate 10. When the two electrode layers are powered on, electrons injected from the cathode and holes injected from the anode combine in the organic light-emitting material sublayer, releasing energy and manifesting as light. Different compositions of the light-emitting material in the organic light-emitting material sublayer result in different colors of emitted light; therefore, by selecting different light-emitting materials, the three primary colors of red, blue, and green can be obtained, achieving full-color display. The active light-emitting layer 30 includes the organic light-emitting material sublayer and may also include at least one of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL), primarily composed of various organic materials.

[0066] As one embodiment of the present invention, please continue to refer to Figures 1-2 Optionally, the active light-emitting layer 30 includes a quantum dot light-emitting sublayer, a driving backplate 10, and the active light-emitting layer 30, the first electrode layer 40, and the encapsulation layer 50 on the driving backplate 10 to form a QLED display panel.

[0067] Specifically, the material of the luminescent layer of quantum dots includes quantum dots themselves. Quantum dots are semiconductors, such as indium phosphide, gallium nitride, cadmium selenide, and lead sulfide. As an inorganic semiconductor material, quantum dots have a narrow emission spectrum, high color purity, and good optical stability, and are attracting increasing attention in the display field. The luminescence of quantum dots is the result of electron-hole recombination, or exciton annihilation. To make a quantum dot emit light, it must first generate an exciton. There are generally two ways to generate excitons: photoluminescence and electroluminescence; this embodiment of the invention uses electroluminescence. When not excited (ground state), all electrons are distributed in the valence band. When the two electrode layers are powered on, an electron can be injected into the conduction band of the quantum dot from the outside through an electric field, and a hole can be injected into the valence band. The electron and hole recombine here, emitting a photon. Quantum dots, unlike other materials, can also produce the three primary colors: red, blue, and green. In addition to the quantum dot luminescent layer, the active light-emitting layer 30 may also include at least one of the following: a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL).

[0068] As one embodiment of the present invention, the active light-emitting layer 30 may optionally include organic light-emitting materials or be doped with quantum dots.

[0069] Figure 4 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, for reference. Figure 4 Optionally, the display panel may also include a light filter layer 90, located between the passive display layer 60 and the encapsulation layer 50. The light filter layer 90 is used to filter the light emitted by the active light-emitting layer 30, thereby improving the display effect of the active display panel. The light filter layer 90 includes multiple filter units of different colors and a black matrix arranged around the filter units. Figure 4 The diagram illustrates, for example, a filter unit comprising a red filter unit (RCF), a green filter unit (GCF), and a blue filter unit (BCF). The red filter unit (RCF) filters out light of other colors, allowing red light to pass through; the green filter unit (GCF) filters out light of other colors, allowing green light to pass through; and the blue filter unit (BCF) filters out light of other colors, allowing blue light to pass through.

[0070] Optional, see reference Figure 1 and Figure 2 A shared electrode layer, a driving backplate 10, a passive display layer 60, and a second electrode layer 70 are used to constitute an electronic paper display panel. A display screen (monitor) employing electronic paper technology is called electronic paper or an electronic paper screen. Its characteristics include reflective light emission, ultra-thin and lightweight design, ultra-low power consumption, and even flexibility. The electronic paper display panel in this embodiment of the invention is formed based on electronic paper technology. Electronic paper technology includes electrophoretic display technology and electrowetting display technology, etc.

[0071] Optionally, by controlling the electric field applied to the passive display layer and adapting the displayed colors to the passive display layer, the passive display layer can be reused as a filter layer for an active-matrix display panel, eliminating the need for a traditional color filter (CF) layer. This allows for a further reduction in the overall thickness of the display panel while maintaining the display effect of the active-matrix display panel. Furthermore, the presence of a traditional CF filter layer avoids the excessive distance between the two electrodes of the passive display layer, which would weaken the electric field and affect the movement of display particles or oil film within the passive display layer. Additionally, existing display devices use CF filters for color adjustment, but the presence of CF filters also reduces the brightness of the display device, resulting in higher power consumption to meet brightness requirements. Reusing the passive display layer as a filter layer for an active-matrix display panel can further reduce the power consumption of the display device.

[0072] In one embodiment of the present invention, please continue to refer to Figures 1-2 Optionally, each shared electrode 20, along with the active light-emitting layer 30 and the first electrode layer 40 located on one side of the shared electrode 20, constitutes an active light-emitting unit; each shared electrode 20, along with the passive display layer 60 and the second electrode layer 70 located on one side of the shared electrode 20, constitutes a passive display unit.

[0073] When the passive display layer 60 is reused as the filter layer of the active light-emitting layer 30, each passive display unit is used as a filter unit of the active light-emitting unit that shares the same common electrode 20.

[0074] Specifically, the active-matrix display panel includes active-matrix light-emitting units of various emitting colors. An active-matrix light-emitting unit can be understood as a sub-pixel in the active-matrix display panel. Sub-pixels in the active-matrix display panel may include red sub-pixels for emitting red light, green sub-pixels for emitting green light, and blue sub-pixels for emitting blue light, and may also include sub-pixels of other emitting colors. The red sub-pixel has a red-emitting layer R, the green sub-pixel has a green-emitting layer G, and the blue sub-pixel has a blue-emitting layer B. Each shared electrode 20, along with the passive display layer 60 and the second electrode layer 70 located on one side of the shared electrode 20, constitutes a passive display unit. The passive display unit constitutes a sub-pixel of the passive-matrix display panel.

[0075] The subpixels in a passive display panel can include red subpixels for reflecting red light, green subpixels for reflecting green light, and blue subpixels for reflecting blue light; they can also include subpixels that reflect other colors of light. The subpixels in the passive display panel that reflect red light correspond one-to-one with the subpixels in the active display panel that emit red light; the subpixels in the passive display panel that reflect green light correspond one-to-one with the subpixels in the active display panel that emit green light; and the subpixels in the passive display panel that reflect blue light correspond one-to-one with the subpixels in the active display panel that emit blue light. This allows each passive display unit to serve as a filter unit for active light-emitting units sharing the same shared electrode 20, enabling filtering of each active light-emitting unit and improving the display effect of the display panel.

[0076] Please continue to refer to this. Figures 1-2 Optionally, the display panel further includes a touch layer 80; the second electrode layer 70 is reused as a touch electrode layer in the touch layer 80. This can further reduce the thickness and cost of the display panel.

[0077] refer to Figure 2 and Figure 3 As one embodiment of the present invention, optionally, when the passive display layer 60 is an electrowetting display layer, the passive display layer 60 includes a hydrophobic layer 61 and an electrowetting ink layer 62; the hydrophobic layer 61 is located on the side of the electrowetting ink layer 62 close to the drive backplate 10.

[0078] The electrowetting ink layer 62 includes water 622, multiple colored oil films 621 immersed in water 622, and spacers 623 for separating two adjacent colored oil films 621 of different colors; when the passive display layer 60 is reused as a filter layer of the active light-emitting layer 30, the second electrode layer 70 is not powered.

[0079] Specifically, electrowetting display technology is a technology developed using the inherent natural forces and related theories of the oil-water interface 622. This technology employs a highly hydrophobic material that can repel water 622 from the surface, using an oil film 621 as a medium to form separate oil and water phases. The wetting effect of the water-resistant surface can be altered by voltage, making the surface more hydrophilic (wetting). Because the previously water-resistant surface now becomes more absorbent, the oil film 621 must change its form. This control of interface properties is the foundation of electrowetting applications.

[0080] In display formation, the principle of electrowetting can be used to create a pixel modulator. When different pixels are independently activated to create an image, the oil film 621 is stained with a color, thus forming the display. In principle, any desired color can be given to the pixels, thereby obtaining various display effects. By associating the oil film 621 with the pixel, the form of the oil film 621 changes, causing a change in the pixel color, thus achieving color change. For example, see reference... Figure 2 When there is no electric field between the shared electrode 20 and the second electrode layer 70, the oil film 621 is in a flattened state, at which point the color of the oil film 621 can be displayed; Reference Figure 3 When an electric field exists between the shared electrode 20 and the second electrode layer 70, the oil film 621 is in an aggregated state. The aggregation or flattening of the oil film 621 is controlled by the electric field, thereby enabling the display of a specific image.

[0081] When the active light-emitting layer 30 is used for display, the second electrode layer 70 is not powered. Therefore, the second electrode layer 70 and the shared electrode layer cannot supply power to the passive display layer 60, thus controlling all the oil film 621 to be in a flattened state. This allows the oil film 621 to be used as a filter, enabling normal display. When low-power display is required, power can be withheld from the first electrode layer 40 above the active light-emitting layer 30, turning off the light-emitting sub-pixels. The flattening or aggregation of the oil film 621 can be controlled only by controlling the electric field between each shared electrode 20 and the second electrode layer 70, achieving the display of the electrowetting electronic paper display panel.

[0082] Figure 5 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, for reference. Figure 5 Optionally, the encapsulation layer 50 can be reused as a hydrophobic layer 61. This can be understood as setting the encapsulation layer 50 and the hydrophobic layer 61 as the same layer, which can further reduce the overall thickness of the display panel; and it can avoid the distance between the two electrodes of the passive display layer 60 being too large, which would weaken the electric field and thus affect the switching of the oil film 621 in the passive display layer 60 from a flattened state to a concentrated state.

[0083] Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Figure 7 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, for reference. Figure 6 and Figure 7 As one embodiment of the present invention, optionally, when the passive display layer 60 is an electrophoretic display layer, the passive display layer 60 includes:

[0084] Multiple cavities 63, each cavity 63 is filled with an electrophoretic solution containing charged ink particles 64 of a certain color; wherein, the color of the charged ink particles 64 is a filter color;

[0085] Multiple vertical electrode pairs, each vertical electrode pair including a first vertical electrode L1 and a second vertical electrode L2; each cavity 63 is located between the first vertical electrode L1 and the second vertical electrode L2 of a vertical electrode pair; the first vertical electrode L1 and the second vertical electrode L2 are used to provide a second electric field to the charged ink particles 64.

[0086] Among them, reference Figure 6 When the passive display layer 60 is reused as the filter layer of the active light-emitting layer 30, the charged ink particles 64, under the action of the first electric field, are located at the top of the cavity 63. (Reference) Figure 7 When the passive display layer 60 is used for display, the charged ink particles 64 in the display cavity 63 are located at the top of the cavity 63 under the action of the first electric field, and thus display the corresponding color; in the non-display cavity 63, the charged ink particles 64 are located on the side of the cavity 63 under the action of the second electric field, and the active light-emitting layer 30 below is not lit, that is, the pixel at this position is not displayed. Figure 7 Three cavities 63 are illustrated in the example, where the cavity 63 at the left end and the cavity 63 at the right end are the displayed cavities 63, and the cavity 63 in the middle is the non-displayed cavity 63.

[0087] Figure 8 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Figure 9 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, for reference. Figure 8 and Figure 9 As one embodiment of the present invention, optionally, when the passive display layer 60 is an electrophoretic display layer, the passive display layer 60 includes:

[0088] Multiple cavities 63, each cavity 63 is filled with an electrophoretic solution containing charged ink particles of at least two colors; wherein, some of the charged ink particles are colored with a filter color and some of the charged ink particles are colored with a non-filter color.

[0089] Multiple vertical electrode pairs, each vertical electrode pair including a first vertical electrode L1 and a second vertical electrode L2; each cavity 63 is located between the first vertical electrode L1 and the second vertical electrode L2 of a vertical electrode pair; when the passive display layer 60 is reused as a filter layer of the active light-emitting layer 30, the first vertical electrode L1 and the second vertical electrode L2 are used to provide a second electric field to the charged ink particles, so as to drive the non-filter color charged ink particles 642 to the side of the cavity 63.

[0090] For details, please refer to Figure 6The cavity 63 can be a microcapsule 631, and the passive display layer 60 performs microcapsule electrophoretic display. Before coating, the microcapsule electrophoretic display material is a liquid material, figuratively called electronic ink "water." Hundreds or thousands of microcapsules 631, roughly the size of a human hair, are suspended in this liquid material. Each microcapsule 631 contains both positively and negatively charged particles. The electronic paper microcapsules 631 can be directly printed onto the surface of the encapsulation layer 50 away from the driving backplane 10, further simplifying the structure and preventing excessive distance between the two electrodes of the passive display layer 60, which could weaken the electric field and affect the movement of display particles in the passive display layer 60. If the shared electrode 20 is the positive electrode and the second electrode layer 70 is the negative electrode, positively charged particles move to the negative electrode under the influence of the electric field, displaying the color of the positively charged particles, while negatively charged particles move to the bottom of the microcapsule and "hide." Conversely, if the shared electrode 20 is the negative electrode and the second electrode layer 70 is the positive electrode, negatively charged particles move to the positive electrode under the influence of the electric field, displaying the color of the negatively charged particles, while positively charged particles move to the bottom of the microcapsule and "hide." When the microcapsule 631 contains colored charged ink particles, it can display color.

[0091] refer to Figure 9 The cavity 63 can be a microcup 632, each containing at least two colors of charged ink particles. The passive display layer 60 performs electrophoretic display on the microcup 632. Its display principle is basically the same as that of the microcapsule type, except that the solution containing charged particles is encapsulated in a specially designed microcup instead of a capsule. The microcup 632 includes a groove 601 and a cup wall 602, and can be formed by etching a material layer. By applying and switching an electric field to the dispersion system, the charged particles are electrophoretically generated in the microcup to achieve image display. Encapsulating the charged particles and dielectric liquid in the microcup 632 separates the electrophoretic solution into tiny, independent units, effectively preventing leakage of the electrophoretic solution and displacement of particles. The microcup 632 structure offers advantages in terms of shape flexibility, structural integrity, and mechanical stability. It exhibits excellent display performance under bending, curling, and pressure conditions. No sealant is required on the sides, and it can be cut to any desired size and shape. During electrophoretic display, the electrophoretic solution in adjacent areas will not mix or interfere with each other. Furthermore, the microcup 632 provides a more uniform movement space for charged particles, and its relatively consistent height makes it easier to control and display three (or more) types of particles.

[0092] refer to Figure 8 and Figure 9Since the passive display layer 60 can be reused as a filter layer for the active light-emitting layer 30, each cavity 63 is filled with an electrophoretic solution containing charged ink particles of two colors; wherein, some of the charged ink particles (641) are the filter color, and some of the charged ink particles (642) are the non-filter color. For example, the sub-pixels in an active display panel may include red sub-pixels for emitting red light, green sub-pixels for emitting green light, and blue sub-pixels for emitting blue light. Thus, the cavities 63 in the passive display layer 60 form several uniformly and regularly arranged colored sub-pixels. The cavities 63 corresponding to the three colored sub-pixels sequentially contain red, green, and blue charged ink particles and electrophoretic solution. The cavity 63 above the red sub-pixel emitting red light contains red charged ink particles and non-filtered (e.g., black or white) charged ink particles 642; the cavity 63 above the green sub-pixel emitting green light contains green charged ink particles and non-filtered charged ink particles 642; the cavity 63 above the green sub-pixel emitting blue light contains blue charged ink particles and non-filtered charged ink particles 642. Different color filtering is achieved by driving the red, green, and blue charged pigment particles in the cavity 63.

[0093] To avoid the influence of non-filtering charged ink particles 642 on the filtering process, vertical electrodes, namely a first vertical electrode L1 and a second vertical electrode L2, are respectively provided on opposite sides of each cavity 63. The first vertical electrode L1 and the second vertical electrode L2 are used to provide a second electric field to the charged ink particles, so as to drive the non-filtering charged ink particles 642 to a position near the side of the cavity 63. The first vertical electrode L1 and the second vertical electrode L2 can be electrically insulated from the first electrode layer through the encapsulation layer 50; the first vertical electrode L1 and the second vertical electrode L2 can be electrically insulated from the second electrode layer without contact, or a dielectric layer can be provided between the vertical electrode and the second electrode layer.

[0094] This can be understood as follows: Under the combined action of the second electric field provided by the first vertical electrode L1 and the second vertical electrode L2 on both sides, and the first electric field provided by the shared electrode 20 and the second electrode layer 70, the charged ink particles in each cavity 63 can drive the filter-colored charged ink particles 641 to the upper left of the cavity 63, and drive the non-filter-colored charged ink particles 642 to the lower right of the cavity 63 (e.g., ...). Figure 8 and Figure 9 Alternatively, drive charged ink particles 641 of the filter color to the upper part of the cavity 63, and drive charged ink particles 642 of the non-filter color to the lower left part (not shown) of the cavity 63.

[0095] In other words, at least some of the non-filtering colored charged ink particles 642 are located on the side of the cavity 63, and the bottom region of the cavity 63 has a region through which light can be emitted by the light-emitting sub-pixels. At least some of the filtering colored charged ink particles 641 are located on the top of the cavity 63; and the region on the top of the cavity 63 with the filtering colored charged ink particles 641 at least partially overlaps with the region on the bottom region of the cavity 63 through which light can be emitted by the light-emitting sub-pixels in the vertical direction, thereby achieving the filtering effect on the light-emitting sub-pixels.

[0096] When only the passive display layer 60 is used for display, the first electrode layer 40 can be de-energized, preventing the active light-emitting layer 30 from emitting light. When only the active light-emitting layer 30 is used for display, the electric field strength of the second electric field provided by the first vertical electrode L1 and the second vertical electrode L2 can be controlled to be much greater than the electric field strength of the first electric field provided by the second electrode layer 70 and the shared electrode layer. This causes the non-filtering colored charged ink particles 642 and the filter colored charged ink particles 641 to be closer to the sidewall of the cavity, reducing the impact on the light emission of the active light-emitting layer 30.

[0097] As one embodiment of the present invention, optionally, the pixel definition layer includes multiple openings, each opening is configured to correspond one-to-one with a shared electrode 20 and exposes a portion of the shared electrode 20, and the active light-emitting layer 30 is located in the opening; the vertical projection area of ​​the opening on the shared electrode 20 is smaller than the vertical projection area of ​​the cavity 63 on the shared electrode 20.

[0098] Specifically, Figure 10 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Figure 11 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, for reference. Figure 10 and Figure 11 The openings are configured one-to-one with the shared electrodes 20, exposing a portion of the shared electrodes 20; that is, the size of the shared electrodes 20 is larger than the size of the active light-emitting layer 30. The vertical projection area of ​​the openings on the shared electrodes 20 is set smaller than the vertical projection area of ​​the cavity 63 on the shared electrodes 20, ensuring that the vertical projection of each passive display unit on the driving backplate 10 is larger than the vertical projection of each active light-emitting unit. During the filtering process, after driving the non-filtering colored charged ink particles 642 to the lower right or lower left of the cavity 63, the vertical projection of the non-filtering colored charged ink particles 642 on the shared electrodes 20 and the vertical projection of the active light-emitting layer 30 (R / G / B) on the shared electrodes 20 will at least partially not overlap, thereby reducing the influence of the non-filtering colored charged ink particles 642 on the filtering effect.

[0099] Figure 12 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Figure 13This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, for reference. Figure 12 and Figure 13 As one embodiment of the present invention, optionally, in each cavity 63, the number of charged ink particles 641 with a filter color is greater than the number of charged ink particles 642 with a non-filter color.

[0100] Specifically, during the filtering process, after driving the filter color charged ink particles 641 to the upper right or upper left of the cavity 63, the vertical projection of the filter color charged ink particles 641 on the shared electrode 20 can be increased, and the overlap area between the vertical projection of the filter color charged ink particles 641 on the shared electrode 20 and the area at the bottom of the cavity 63 that can emit light through the light-emitting sub-pixels can be increased, thereby enhancing the filtering effect of the filter color charged ink particles 641.

[0101] Figure 14 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Figure 15 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, for reference. Figure 14 and Figure 15 As one embodiment of the present invention, optionally, each cavity 63 may further include a plurality of non-charged ink particles (643), the color of which is a filter color.

[0102] This can be understood as follows: each cavity 63 contains at least two colors of ink particles, some of which are filter colors and some are non-filter colors. Furthermore, all non-filter ink particles are charged, forming non-filter charged ink particles 642; some filter ink particles are charged, forming filter charged ink particles 641; and other filter ink particles are uncharged, forming filter uncharged ink particles 643. When the passive display layer 60 is reused as the filter layer of the active light-emitting layer 30, only a second electric field needs to be provided by the vertical electrode to the charged ink particles in the corresponding cavity 63. This allows the charged ink particles (641 / 642) to move to both sides of the cavity 63; the uncharged ink particles (643) are located in the middle region; and the uncharged ink particles (643) are filter colors, thus achieving light filtering for the light-emitting sub-pixels. In another embodiment of the present invention, the charged ink particles (641 / 642) may not all be filter colors, and only the uncharged ink particles (643) need to be filter colors.

[0103] Each cavity 63 includes uncharged ink particles (filter color) and charged ink particles (which may include filter color, or all may be uncharged color). When low-power display is required, the first electrode layer 40 is not powered, while the second electrode layer 70 and the shared electrode layer are powered. The uncharged ink particles are moved up and down by a first electric field, thereby enabling the pixel to switch between uncharged and filter ink particles, thus achieving display. The filter particles are uncharged and remain fixed in the middle position. When the active light-emitting layer 30 emits light, the vertical electrode pair drives the charged uncharged ink particles to the side of the cavity 63, filtering the light through the uncharged filter ink particles fixed in the middle position.

[0104] Figure 16 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Figure 17 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, for reference. Figure 16 and Figure 17 In one embodiment of the present invention, optionally, two adjacent non-cavity bodies 63 share a common vertical electrode. The first vertical electrode L1 and the second vertical electrode L2 are alternately arranged in sequence. This reduces the number of vertical electrodes, lowers the cost of the display device, and reduces the complexity of its fabrication. Furthermore, it reduces the area occupied by the vertical electrodes, increasing the number of sub-pixels on the display panel.

[0105] Additionally, in microcup electrophoresis display, the vertical electrode can be disposed inside the groove 601 of the microcup 632, or outside the groove 601 of the microcup 632 (e.g., Figure 9 Alternatively, it can be placed in the cup wall 602 of the microcup 632.

[0106] This invention also provides a display device, including the display panel described in any of the above embodiments, which has the same technical effects and will not be repeated here.

[0107] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that, include: Drive backplane; A shared electrode layer is located on one side of the drive backplate, and the shared electrode layer includes a plurality of shared electrodes spaced apart. An active light-emitting layer and a first electrode layer; the active light-emitting layer is located on the side of the shared electrode layer away from the driving backplane, and the first electrode layer is located on the side of the active light-emitting layer away from the driving backplane; the shared electrode layer and the first electrode layer are used to supply power to the active light-emitting layer; An encapsulation layer is located on the side of the first electrode layer away from the driving backplate, and the encapsulation layer is used to encapsulate the active light-emitting layer and the first electrode layer; A passive display layer and a second electrode layer; the passive display layer is located on the side of the encapsulation layer away from the driving backplane, and the second electrode layer is located on the side of the passive display layer away from the driving backplane; the shared electrode layer and the second electrode layer are used to provide a first electric field for the passive display layer.

2. The display panel according to claim 1, characterized in that, Each shared electrode, along with an active light-emitting layer and a first electrode layer located on one side of the shared electrode, constitutes an active light-emitting unit; each shared electrode, along with a passive display layer and a second electrode layer located on one side of the shared electrode, constitutes a passive display unit. The passive display layer can be reused as a filter layer for the active light-emitting layer, and each passive display unit is used as a filter unit for an active light-emitting unit that shares the same common electrode.

3. The display panel according to claim 2, characterized in that, The display panel further includes a touch layer; the second electrode layer is reused as a touch electrode layer in the touch layer; The active light-emitting layer includes organic light-emitting materials and / or quantum dots; the passive display layer includes an electrophoretic display layer or an electrowetting display layer.

4. The display panel according to claim 3, characterized in that, When the passive display layer is an electrowetting display layer, the passive display layer includes a hydrophobic layer and a first electrowetting ink layer; the hydrophobic layer is located on the side of the first electrowetting ink layer near the driving backplate; The first electrowetting ink layer includes water, multiple colored oil films immersed in water, and spacers for separating adjacent colored oil films of two different colors; when the passive display layer is reused as the filter layer of the active light-emitting layer, the second electrode layer is not powered. The encapsulation layer is reused as the hydrophobic layer.

5. The display panel according to claim 3, characterized in that, When the passive display layer is an electrophoretic display layer, the passive display layer includes: Multiple cavities, each cavity being filled with an electrophoretic solution containing charged ink particles of a single color; wherein the color of the charged ink particles is a filter color; Multiple vertical electrode pairs, each vertical electrode pair including a first vertical electrode and a second vertical electrode; each cavity is located between the first vertical electrode and the second vertical electrode of a vertical electrode pair; the first vertical electrode and the second vertical electrode are used to provide a second electric field to the charged ink particles; When the passive display layer is reused as the filter layer of the active light-emitting layer, the charged ink particles are located at the top of the cavity under the action of the first electric field; When the passive display layer is used for display, in the displayed cavity, the charged ink particles are located at the top of the cavity under the action of the first electric field; in the non-display cavity, the charged ink particles are located on the side of the cavity under the action of the second electric field.

6. The display panel according to claim 3, characterized in that, When the passive display layer is an electrophoretic display layer, the passive display layer includes: Multiple cavities, each cavity being filled with an electrophoretic solution containing charged ink particles of two colors; wherein, some of the charged ink particles are of a filter color and some of the charged ink particles are of a non-filter color; Multiple vertical electrode pairs, each vertical electrode pair including a first vertical electrode and a second vertical electrode; each cavity is located between the first vertical electrode and the second vertical electrode of a vertical electrode pair; when the passive display layer is reused as the filter layer of the active light-emitting layer, the first vertical electrode and the second vertical electrode are used to provide a second electric field to the charged ink particles; under the combined action of the first electric field and the second electric field, the filter-colored charged ink particles cover at least a portion of the top region of the cavity, and the vertical projection of the filter-colored charged ink particles at the top of the cavity onto the bottom of the cavity does not overlap with at least a portion of the region where the non-filter-colored charged ink particles are located at the bottom of the cavity.

7. The display panel according to claim 6, characterized in that, One side of the driving backplate also includes a pixel definition layer, which includes multiple openings. Each opening corresponds to a shared electrode and exposes a portion of the shared electrode. The active light-emitting layer is located in the opening. The vertical projection area of ​​the opening on the shared electrode is smaller than the vertical projection area of ​​the cavity on the shared electrode.

8. The display panel according to claim 3, characterized in that, When the passive display layer is an electrophoretic display layer, the passive display layer includes: Multiple cavities, each cavity being filled with an electrophoretic solution containing charged and uncharged ink particles; wherein the color of the uncharged ink particles is a filter color; Multiple vertical electrode pairs, each vertical electrode pair including a first vertical electrode and a second vertical electrode; each cavity is located between the first vertical electrode and the second vertical electrode of a vertical electrode pair; when the passive display layer is reused as the filter layer of the active light-emitting layer, the first vertical electrode and the second vertical electrode are used to provide a second electric field to the charged ink particles, so as to drive the charged ink particles to the side of the cavity and filter light through the uncharged ink particles of the filter color.

9. The display panel according to any one of claims 5, 6 and 8, characterized in that, Two adjacent cavities share a vertical electrode; the first vertical electrode and the second vertical electrode are alternately arranged in sequence; The cavity includes microcapsules or microcups.

10. A display device, characterized in that, Includes the display panel described in any one of claims 1 to 9.

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