Display panel and electronic device

Abstract

A display panel and an electronic device, relating to the technical field of electronic products. The display panel comprises: a display panel body, the display panel body comprising a first display surface and a second display surface facing away from each other; a light-emitting diode, the light-emitting diode being arranged on the display panel body; and an electrophoresis structure, wherein the electrophoresis structure is arranged on the display panel body, the electrophoresis structure comprises a first electrode layer, an electrophoresis cavity and a second electrode layer which are sequentially stacked, the electrophoresis cavity is arranged corresponding to the light-emitting diode, the first electrode layer is arranged on the side where the first display surface is located, the second electrode layer is arranged on the side where the second display surface is located, and the electrophoresis cavity is filled with a electrophoretic liquid and electrophoretic particles. During display by the first display surface, the electrophoretic particles gather on the second electrode layer and form a first reflecting layer; and during display by the second display surface, the electrophoretic particles gather on the first electrode layer and form a second reflecting layer.

Description

Display panels and electronic devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on June 27, 2023, with application number 202310765745.6 and titled “Display Panel and Electronic Device,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application belongs to the technical field of electronic products, and specifically relates to a display panel and an electronic device. Background Art

[0004] With the development of technology, more and more electronic products adopt double-sided display design solutions, especially electronic products such as foldable screen mobile phones. In order to be able to display after folding, a double-sided display design solution is usually adopted on at least one folding part.

[0005] Currently, two independent screens are usually arranged back to back to achieve a double-sided display design; however, arranging two independent screens back to back will increase the overall thickness of the electronic product, thereby increasing the thickness cost of the electronic product.

[0006] It can be seen that the double-sided display design solution in the related art has the problem of high thickness cost.

[0007] Summary of the Invention

[0008] The present application aims to provide a display panel and an electronic device that can solve the problem of high thickness and cost in the double-sided display design solution in the related art.

[0009] In order to solve the above technical problems, this application is implemented as follows:

[0010] In a first aspect, an embodiment of the present application provides a display panel, comprising:

[0011] A display panel body, the display panel body comprising a first display surface and a second display surface disposed opposite to each other;

[0012] a light emitting diode, wherein the light emitting diode is disposed on the display panel body; and

[0013] an electrophoretic structure, the electrophoretic structure being disposed on the display panel body and located between the first display surface and the second display surface, the electrophoretic structure comprising a first electrode layer, an electrophoretic cavity, and a second electrode layer stacked sequentially, the electrophoretic cavity being disposed corresponding to the light-emitting diode, the first electrode layer being disposed on a side where the first display surface is located, the second electrode layer being disposed on a side where the second display surface is located, and the electrophoretic cavity being filled with an electrophoretic fluid and electrophoretic particles;

[0014] When the first display surface is displaying, the electrophoretic particles gather on the second electrode layer and form a first reflective layer; when the second display surface is displaying, the electrophoretic particles gather on the first electrode layer and form a second reflective layer.

[0015] In a second aspect, an embodiment of the present application provides an electronic device, comprising the display panel described in the first aspect.

[0016] In an embodiment of the present application, by energizing one of the first electrode layer and the second electrode layer, the electrophoretic particles can be gathered on the energized electrode layer and form a corresponding reflective layer. In this way, the light emitted by the light-emitting diode is reflected by the reflective layer and then emitted to the side where the non-energized electrode layer is located, and is emitted through the non-energized electrode layer, so that the first display surface or the second display surface of the display panel has a display function; compared with the prior art that requires two independent display panels to realize the double-sided display function of the electronic device, the solution of the present application can effectively reduce the thickness of the display panel and achieve the purpose of reducing the thickness cost of the display panel.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] FIG1 is a schematic diagram of a structure of a display panel according to an embodiment of the present application;

[0020] FIG2 is a partial enlarged view corresponding to area A in FIG1 ;

[0021] FIG3 is a second structural diagram of a display panel provided in an embodiment of the present application;

[0022] FIG4 is a partial enlarged view corresponding to area B in FIG3 ;

[0023] FIG5 is a schematic diagram of the structure of the electrophoretic particle shown in FIG2;

[0024] FIG6 is a second schematic structural diagram of the electrophoretic particle shown in FIG2 ;

[0025] FIG7 is a schematic structural diagram of the light emitting diode shown in FIG1 ;

[0026] FIG8 is a partial top view of the display panel shown in FIG1 ;

[0027] FIG9 is a top view of the touch structure of the display panel shown in FIG1 ;

[0028] FIG10 is a partial top view of the area C in FIG9 ;

[0029] FIG11 is a third structural diagram of a display panel provided in an embodiment of the present application;

[0030] FIG12 is a schematic diagram of the integration of the electrophoretic structure and the light-emitting diode in FIG11;

[0031] FIG13 is a schematic structural diagram of a foldable mobile phone provided in an embodiment of the present application. Specific embodiments

[0032] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0035] Please refer to Figures 1 to 4. Figure 1 is a schematic diagram of the structure of a display panel according to an embodiment of the present application; Figure 2 is a partial enlarged view corresponding to area A in Figure 1; Figure 3 is a second schematic diagram of the structure of a display panel according to an embodiment of the present application; and Figure 4 is a partial enlarged view corresponding to area B in Figure 3. As shown in Figures 1 to 4, an embodiment of the present application provides a display panel, which includes:

[0036] A display panel body 10, the display panel body 10 includes a first display surface 11 and a second display surface 12 disposed opposite to each other;

[0037] a light emitting diode 20 , which is disposed on the display panel body 10 ; and

[0038] The electrophoretic structure 30 is provided on the display panel body 10 and is located between the first display surface 11 and the second display surface 12. The electrophoretic structure 30 includes a first electrode layer 31, an electrophoretic cavity 32, and a second electrode layer 33 stacked in sequence. The electrophoretic cavity 32 is provided corresponding to the light-emitting diode 20. The first electrode layer 31 is provided on the side where the first display surface 11 is located, and the second electrode layer 33 is provided on the side where the second display surface 12 is located. The electrophoretic cavity 32 is filled with an electrophoretic fluid 35 and electrophoretic particles 34.

[0039] When the first display surface 11 is displayed, the electrophoretic particles 34 gather on the second electrode layer 33 and form a first reflective layer, as shown in FIG2 ; when the second display surface 12 is displayed, the electrophoretic particles 34 gather on the first electrode layer 31 and form a second reflective layer, as shown in FIG4 .

[0040] The display panel body 10 can be understood as the main structure of the display panel, including but not limited to a display substrate, polarizer, cover plate, and other structures. The light-emitting diodes 20 can be integrated into the display panel body 10. The display panel drive circuit 40 can also be integrated into the display panel body 10. The light-emitting diodes 20 can be electrically connected to the drive circuit 40 to realize the display function of the display panel. The drive circuit 40 can include a drive circuit thin-film transistor.

[0041] The light emitting diode 20 may be a micro light emitting diode display (micro LED), wherein the length of the light emitting diode 20 may be 0.1 μm to 100 μm, such as 25 μm; and correspondingly, the width of the light emitting diode 20 may be 0.1 μm to 100 μm, such as 10 μm.

[0042] The display panel body 10 may be provided with a receiving cavity adapted for the electrophoretic structure 30, so that the electrophoretic structure 30 can be assembled within the display panel body 10, and the electrophoretic structure 30 is located between the first display surface 11 and the second display surface 12. Furthermore, an electrophoretic cavity 32 may be provided within the receiving cavity corresponding to the light-emitting diode 20. The provision of the electrophoretic cavity 32 corresponding to the light-emitting diode 20 can be understood as the provision of the light-emitting diode 20 through the electrophoretic cavity 32. Specifically, it can be understood that the light-emitting layer of the light-emitting diode 20 is located within the electrophoretic cavity 32, so that light emitted by the light-emitting diode 20 can be emitted through the electrophoretic cavity 32.

[0043] The above-mentioned electrophoretic cavity 32 may include two openings. The above-mentioned first electrode layer 31, electrophoretic cavity 32 and second electrode layer 33 are stacked in sequence. It can be understood that the first electrode layer 31 and the second electrode layer 33 are respectively arranged corresponding to the two openings of the electrophoretic cavity 32, so as to seal the two openings respectively and form a sealed space in the electrophoretic cavity 32. The sealed space can be filled with electrophoretic fluid 35 and electrophoretic particles 34. When one of the first electrode layer 31 and the second electrode layer 33 is energized, the electrophoretic particles 34 can gather in the electrophoretic fluid toward the side where the energized electrode layer is located and form a corresponding reflective layer. The reflective layer can reflect the light emitted by the light-emitting diode 20. After being reflected, the light emitted by the light-emitting diode 20 can be emitted through the side where the unenergized electrode layer is located.

[0044] As shown in Figures 1 to 4, the above-mentioned driving circuit 40 can also be electrically connected to the first electrode layer 31 and the second electrode layer 33 to supply power to the first electrode layer 31 or the second electrode layer 33, so that the electrophoretic particles 34 can gather in the electrophoretic liquid toward the side where the energized electrode layer is located and form a corresponding reflective layer.

[0045] It is understandable that the electrophoretic particles 34 in the present application may gather toward the first electrode layer 31 or the second electrode layer 33 according to changes in electrical properties of the first electrode layer 31 or the second electrode layer 33 and form a corresponding first reflective layer or second reflective layer.

[0046] The first electrode layer 31 and the second electrode layer 33 may both be transparent conductive layer structures, so that light emitted by the light emitting diode 20 can be emitted through the first electrode layer 31 or the second electrode layer 33 .

[0047] In some embodiments, the first electrode layer 31 and the second electrode layer 33 may be transparent conductive layered structures made of materials such as indium tin oxide.

[0048] The electrophoretic fluid 35 may be an electrophoretic fluid with a high transmittance refractive index to reduce energy loss when the light emitted by the light emitting diode 20 is transmitted in the electrophoretic fluid 35 .

[0049] The light emitting diode 20 may be a rectangular parallelepiped structure, and the electrophoresis cavity 32 may include an upper cavity and a lower cavity corresponding to the light emitting diode 20, and the electrophoresis cavity 32 may also include a connecting channel connecting the upper cavity and the lower cavity, so that the upper cavity and the lower cavity are connected as a whole.

[0050] In this embodiment, by energizing one of the first electrode layer 31 and the second electrode layer 33, the electrophoretic particles 34 can be gathered on the energized electrode layer and form a corresponding reflective layer. In this way, the light emitted by the light-emitting diode 20 is reflected by the reflective layer and emitted to the side where the non-energized electrode layer is located, and is emitted through the non-energized electrode layer, so that the first display surface 11 or the second display surface 12 of the display panel has a display function; compared with the prior art that requires two independent display panels to realize the double-sided display function of the electronic device, the solution of the present application can effectively reduce the thickness of the display panel and achieve the purpose of reducing the thickness cost of the display panel.

[0051] For example, when the first display surface 11 is displaying, the second electrode layer 33 can be energized so that the electrophoretic particles 34 gather toward the second electrode layer 33 and form a first reflective layer, so that the light emitted by the light-emitting diode 20 is reflected by the first reflective layer and then emitted from the side where the first electrode layer 31 is located, that is, a light-up display effect is formed on the first display surface 11; when the second display surface 12 is displaying, the first electrode layer 31 can be energized so that the electrophoretic particles 34 gather toward the first electrode layer 31 and form a second reflective layer, so that the light emitted by the light-emitting diode 20 is reflected by the second reflective layer and then emitted from the side where the second electrode layer 33 is located, that is, a light-up display effect is formed on the second display surface 12.

[0052] As shown in Figure 5, the electrophoretic particle 34 includes a particle body 341 and a reflective hierarchical structure 342 that surrounds the particle body 341. By providing the reflective hierarchical structure 342, the reflection efficiency of the electrophoretic particle 34 can be improved.

[0053] The reflective hierarchical structure 342 may be an organic or inorganic coating with high reflective properties, such as a metallic silver coating; and the particle body 341 may be an organic or inorganic electrophoretic material, such as titanium dioxide.

[0054] As shown in FIG6 , the electrophoretic particles 34 further include a protective layer 343, which wraps around the reflective hierarchical structure 342. The provision of the protective layer 343 can reduce the impact deformation of the reflective hierarchical structure 342 after prolonged use of the electrophoretic particles 34, and reduce the reflective effect of the reflective layer formed by the electrophoretic particles 34 on the light emitted by the light-emitting diode 20. The protective layer 343 can be an organic coating, such as a resin layer.

[0055] As shown in FIG7 , the light emitting diode 20 includes a third electrode layer 21 , a first semiconductor layer 22 , a light emitting layer 23 , a second semiconductor layer 24 and a fourth electrode layer 25 , which are stacked. The light emitting diode 20 may be a vertical structure.

[0056] Among them, the first semiconductor layer 22 can be a P-type semiconductor, and the second semiconductor layer 244 can be an N-type semiconductor; the light-emitting layer 23 can be a single quantum well structure or a multi-quantum well structure; the P-type semiconductor can be connected to the positive pole of the power supply, that is, the third electrode layer 21 can be connected to the positive pole of the power supply; the N-type semiconductor can be connected to the negative pole of the power supply, that is, the fourth electrode layer 25 can be connected to the negative pole of the power supply.

[0057] In some embodiments, the light emitting diode 20 may also be a face-up structure or a flip-down structure.

[0058] As shown in FIG8 , the light emitting diode 20 can be disposed throughout the electrophoretic structure 30. Specifically, the light emitting diode 20 can be disposed throughout the electrophoretic cavity 32, and the light emitting layer 23 is located within the electrophoretic cavity 32. With this arrangement, light emitted by the light emitting diode 20 can be emitted through the first electrode layer 31 or the second electrode layer 33, thereby meeting the double-sided display requirements of the display panel.

[0059] Optionally, both the first electrode layer 31 and the second electrode layer 33 are touch sensing layers, i.e., both the first electrode layer 31 and the second electrode layer 33 have touch sensing functions, i.e., both the first electrode layer 31 and the second electrode layer 33 can be used as touch sensing layers of the display panel. This configuration avoids the need for a separate touch sensing layer, further reducing the stack thickness of the display panel.

[0060] For example, when the first display surface 11 is displaying, the electrophoretic particles 34 gather on the second electrode layer 33 and form a first reflective layer, so that the first electrode layer 31 serves as a touch sensing layer of the display panel; when the second display surface 12 is displaying, the electrophoretic particles 34 gather on the first electrode layer 31 and form a second reflective layer, so that the second electrode layer 33 serves as a touch sensing layer of the display panel.

[0061] In some embodiments, the first electrode layer 31 and the second electrode layer 33 can be designed as capacitive touch sensing layers. It is understood that the first electrode layer 31 and the second electrode layer 33 can also be designed as other forms of touch sensing layers as long as they can realize the touch sensing function of the display panel.

[0062] Moreover, in the present application, by using the first electrode layer 31 and the second electrode layer 33 as the touch sensing layer of the display panel, this function can also be time-shared with the electrophoretic function. Specifically, when the first electrode layer 31 is energized and a cluster layer of electrophoretic particles 34 is formed on the side where the first electrode layer 31 is located, the light emitted by the light-emitting diode 20 is emitted through the second electrode layer 33, so that the second electrode layer 33 can be used as the touch function layer of the display panel to meet the touch requirements of the display panel; correspondingly, when the second electrode layer 33 is energized and a cluster layer of electrophoretic particles 34 is formed on the side where the second electrode layer 33 is located, the light emitted by the light-emitting diode 20 is emitted through the first electrode layer 31, so that the first electrode layer 31 can be used as the touch function layer of the display panel to meet the touch requirements of the display panel.

[0063] As shown in Figures 9 and 10, the touch sensing channels in the first electrode layer 31 or the second electrode layer 33 include a touch transverse sensing channel 71 and a touch longitudinal sensing channel 72. When a finger touches the touch panel, the capacitance of the touch position is sensed and the coordinates of the touch position are located, thereby realizing the touch function of the display panel.

[0064] As shown in FIG10 , the first electrode layers 31 corresponding to the light-emitting diodes 20 can be connected through the connection channel 50 to form a touch sensing channel of the display panel; correspondingly, the second electrode layers 33 corresponding to the light-emitting diodes 20 can also be connected through the corresponding connection channel to form a touch sensing channel of the display panel.

[0065] In addition, the touch sensing channel can be electrically connected to the touch chip of the display panel. The touch chip can determine which surface of the display panel to use based on the signal collected by the touch sensing channel, and output a touch signal to the electrode layer on the side of the used surface of the display panel to enable it to have a touch sensing function, and output an electrophoresis control signal to the other side, so that the electrophoretic particles 34 in the electrophoretic cavity 32 gather toward this surface and form a corresponding reflective layer.

[0066] In some embodiments, the touch chip can be a control chip on an electronic device including a display panel. The chip can be integrated into the display panel or integrated into the motherboard of the electronic device, and the display panel can be electrically connected to the motherboard of the electronic device.

[0067] As shown in FIG. 11 and FIG. 12 , the light emitting diode 20 and the electrophoretic structure 30 are an integrated structure, and the light emitting diode 20 and the electrophoretic structure 30 of the integrated structure can be disposed on the display panel body 10 as a whole.

[0068] The above-mentioned light-emitting diode 20 and electrophoretic structure 30 are an integrated structure and can be directly set on the display panel body 10 as independent devices. Compared with first setting the light-emitting diode 20 on the display panel body 10 and then setting the electrophoretic structure 30 corresponding to the light-emitting diode 20, the assembly process of the display panel can be effectively simplified.

[0069] Among them, for the integrated structure of the light-emitting diode 20 and the electrophoretic structure 30, a corresponding contact layer 60 can be set on the electrode layer of the electrophoretic structure 30, so that the electrode layer is electrically connected to the driving circuit 40 of the display panel through the corresponding contact layer 60, thereby realizing the display function of the display panel.

[0070] It can be understood that corresponding contact layers 60 are provided on the first electrode layer 31 and the second electrode layer 33 of the electrophoretic structure 30, and the contact layer 60 can be provided at the edge position of the first electrode layer 31 or the second electrode layer 33 to avoid the contact layer 60 blocking the light emitted by the light-emitting diode 20.

[0071] An embodiment of the present application further provides an electronic device, comprising the above-mentioned display panel.

[0072] It should be noted that the implementation method of the above display panel embodiment is also applicable to the embodiment of the electronic device and can achieve the same technical effect, which will not be described in detail here.

[0073] Among them, the above-mentioned electronic device can be a double-sided display mobile phone, a foldable mobile phone, etc.

[0074] In some embodiments, the electronic device may be a folding mobile phone 200 as shown in FIG13 , including a first folding portion 210 and a second folding portion 220 , wherein the first folding portion 210 includes the above-mentioned display panel so that both the front and back sides of the first folding portion 210 can display.

[0075] Specifically, when the foldable phone 200 is unfolded, the inner screen 211 of the first foldable portion 210 is displayed, and when the foldable phone 200 is closed, the outer screen 212 of the first foldable portion 210 is displayed.

[0076] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0077] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A display panel, wherein: include: A display panel body, the display panel body comprising a first display surface and a second display surface disposed opposite to each other; A light emitting diode, wherein the light emitting diode is disposed on the display panel body; as well as, an electrophoretic structure, wherein the electrophoretic structure is disposed on the display panel body and is located between the first display surface and the second display surface, the electrophoretic structure comprises a first electrode layer, an electrophoretic cavity and a second electrode layer which are sequentially stacked, the electrophoretic cavity is disposed corresponding to the light-emitting diode, the first electrode layer is disposed on a side where the first display surface is located, the second electrode layer is disposed on a side where the second display surface is located, and the electrophoretic cavity is filled with an electrophoretic liquid and electrophoretic particles; Wherein, when the first display surface is displaying, the electrophoretic particles gather on the second electrode layer and form a first reflective layer; When the second display surface is displaying, the electrophoretic particles gather on the first electrode layer and form a second reflective layer.

2. The display panel according to claim 1, wherein: When the first display surface is displaying, the electrophoretic particles gather on the second electrode layer to form a first reflective layer, and the first electrode layer serves as a touch sensing layer of the display panel.

3. The display panel according to claim 1, wherein: When the second display surface is displaying, the electrophoretic particles gather on the first electrode layer to form a second reflective layer, and the second electrode layer serves as a touch sensing layer of the display panel.

4. The display panel according to any one of claims 1 to 3, wherein: The electrophoretic particle comprises a particle body and a reflective hierarchical structure encapsulating the particle body.

5. The display panel according to claim 4, characterized in that: The electrophoretic particle further includes a protective layer, and the protective layer wraps the reflective hierarchical structure.

6. The display panel according to claim 4, wherein: The reflective hierarchical structure is a metallic silver coating that wraps the particle body.

7. The display panel according to claim 1, wherein: The display panel further includes a driving circuit, and the driving circuit is electrically connected to the first electrode layer and the second electrode layer respectively.

8. The display panel according to any one of claims 1 to 3, wherein: The light emitting diode has a vertical structure and comprises a third electrode layer, a first semiconductor layer, a light emitting layer, a second semiconductor layer and a fourth electrode layer which are stacked.

9. The display panel according to claim 8, wherein: The light emitting diode is arranged throughout the electrophoresis cavity, and the light emitting layer is located in the electrophoresis cavity.

10. An electronic device comprising the display panel according to any one of claims 1 to 9.

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