Display panel and electronic device
By introducing an electrophoretic structure into the display panel and using an electrode layer to control the aggregation of electrophoretic particles to form a reflective layer, the problem of increased thickness caused by the double-sided display design was solved, resulting in a reduction in thickness and cost, and a simplified assembly process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- VIVO MOBILE COMM CO LTD
- Filing Date
- 2023-06-27
- Publication Date
- 2026-07-21
AI Technical Summary
Existing double-sided display designs increase the thickness of electronic products, thereby increasing thickness costs.
The electrophoretic structure includes a first electrode layer, an electrophoretic chamber, and a second electrode layer stacked sequentially. The electrophoretic chamber is filled with electrophoretic liquid and electrophoretic particles. By energizing the electrode layers, the electrophoretic particles are controlled to aggregate and form a reflective layer, achieving double-sided display and reducing the thickness of the display panel.
It effectively reduces the thickness and cost of the display panel, while achieving double-sided display functionality, simplifying the assembly process and reducing thickness costs.
Smart Images
Figure CN116979008B_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of electronic product technology, specifically relating to a display panel and an electronic device. Background Technology
[0002] With the development of technology, more and more electronic products are adopting dual-sided display design schemes, especially in electronic products such as foldable screen phones. In order to be able to display even after folding, a dual-sided display design scheme is usually adopted on at least one fold.
[0003] Currently, two independent screens are usually placed back to back to achieve a double-sided display design. However, placing two independent screens back to back will increase the overall thickness of the electronic product, thereby increasing the cost of the electronic product.
[0004] It is evident that the double-sided display design in related technologies suffers from high thickness and cost. Summary of the Invention
[0005] This application aims to provide a display panel and electronic device that can solve the problem of high thickness and cost in the double-sided display design scheme of related technologies.
[0006] To solve the above-mentioned technical problems, this application is implemented as follows:
[0007] In a first aspect, embodiments of this application provide a display panel, comprising:
[0008] The display panel body includes a first display surface and a second display surface disposed opposite to each other.
[0009] Light-emitting diodes, the light-emitting diodes being disposed on the display panel body; and,
[0010] An electrophoretic structure is disposed on the display panel body and located between the first display surface and the second display surface. The electrophoretic structure includes a first electrode layer, an electrophoretic cavity, and a second electrode layer stacked sequentially. The electrophoretic cavity is disposed corresponding to the light-emitting diode. The first electrode layer is disposed on the side where the first display surface is located, and the second electrode layer is disposed on the side where the second display surface is located. The electrophoretic cavity is filled with electrophoretic liquid and electrophoretic particles.
[0011] When the first display surface is used, the electrophoretic particles aggregate on the second electrode layer to form a first reflective layer; when the second display surface is used, the electrophoretic particles aggregate on the first electrode layer to form a second reflective layer.
[0012] Secondly, embodiments of this application provide an electronic device including the display panel described in the first aspect above.
[0013] In the embodiments of this application, by energizing one of the first electrode layers and the second electrode layer, electrophoretic particles can be aggregated on the energized electrode layer to form a corresponding reflective layer. The light emitted by the light-emitting diode is then reflected by the reflective layer and directed to the side where the unenergized electrode layer is located, and emitted through the unenergized electrode layer, so that the first or second display surface of the display panel has a display function. Compared with the prior art, which requires two independent display panels to realize the dual-sided display function of electronic devices, the thickness of the display panel can be effectively reduced, and the cost of the display panel thickness can be reduced.
[0014] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0015] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0016] Figure 1 This is one of the structural schematic diagrams of the display panel provided in the embodiments of this application;
[0017] Figure 2 yes Figure 1 A magnified view of the area corresponding to region A in the middle;
[0018] Figure 3 This is a second schematic diagram of the structure of the display panel provided in the embodiments of this application;
[0019] Figure 4 yes Figure 3 A magnified view of the area corresponding to region B in the middle;
[0020] Figure 5 yes Figure 2 One of the schematic diagrams of the structure of the electrophoretic particles shown;
[0021] Figure 6 yes Figure 2 The second schematic diagram of the structure of the electrophoretic particles shown;
[0022] Figure 7 yes Figure 1 The diagram shows the structure of a light-emitting diode.
[0023] Figure 8 yes Figure 1 A partial top view of the display panel shown;
[0024] Figure 9 yes Figure 1 A top view of the touch structure of the display panel shown;
[0025] Figure 10 yes Figure 9 A partial top view of area C in the image;
[0026] Figure 11 This is the third schematic diagram of the structure of the display panel provided in the embodiments of this application;
[0027] Figure 12 yes Figure 11 A schematic diagram showing the integration of the electrophoretic structure and the light-emitting diode;
[0028] Figure 13 This is a schematic diagram of the structure of the foldable phone provided in the embodiments of this application. Detailed Implementation
[0029] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0030] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0032] Please see Figures 1 to 4 , Figure 1 This is one of the structural schematic diagrams of the display panel provided in the embodiments of this application; Figure 2 yes Figure 1 A magnified view of the area corresponding to region A in the middle;Figure 3 This is a second schematic diagram of the structure of the display panel provided in the embodiments of this application; Figure 4 yes Figure 3 A magnified view of the area corresponding to region B in the middle.
[0033] like Figures 1 to 4 As shown, this application embodiment provides a display panel, which includes:
[0034] 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;
[0035] Light-emitting diode 20, which is disposed on the display panel body 10; and,
[0036] An electrophoresis structure 30 is disposed on the display panel body 10 and is located between the first display surface 11 and the second display surface 12. The electrophoresis structure 30 includes a first electrode layer 31, an electrophoresis cavity 32 and a second electrode layer 33 stacked in sequence. The electrophoresis cavity 32 is disposed corresponding to the light-emitting diode 20. The first electrode layer 31 is disposed on the side where the first display surface 11 is located, and the second electrode layer 33 is disposed on the side where the second display surface 12 is located. The electrophoresis cavity 32 is filled with electrophoretic liquid 35 and electrophoretic particles 34.
[0037] When displayed on the first display surface 11, the electrophoretic particles 34 aggregate on the second electrode layer 33 and form a first reflective layer, specifically as follows: Figure 2 As shown; when displayed on the second display surface 12, the electrophoretic particles 34 aggregate on the first electrode layer 31 and form a second reflective layer, specifically as follows: Figure 4 As shown.
[0038] The aforementioned 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, etc. Light-emitting diodes (LEDs) 20 can be integrated into the display panel body 10, and a driving circuit 40 for the display panel can also be integrated into the display panel body 10. The LEDs 20 can be electrically connected to the driving circuit 40 to realize the display function of the display panel. The driving circuit 40 may include a thin-film transistor.
[0039] The aforementioned light-emitting diode 20 can be a micro light-emitting diode display (micro LED). The length of the light-emitting diode 20 can be from 0.1um to 100um, such as 25um; correspondingly, the width of the light-emitting diode 20 can be from 0.1um to 100um, such as 10um.
[0040] The aforementioned display panel body 10 may be provided with a receiving cavity adapted to the electrophoresis structure 30, so that the electrophoresis structure 30 can be assembled inside the display panel body 10, and the electrophoresis structure 30 is located between the first display surface 11 and the second display surface 12. Furthermore, the electrophoresis cavity 32 may be disposed within this receiving cavity corresponding to the light-emitting diode 20. Specifically, the electrophoresis cavity 32 corresponding to the light-emitting diode 20 can be understood as the light-emitting diode 20 penetrating through the electrophoresis cavity 32; that is, the light-emitting layer of the light-emitting diode 20 is located within the electrophoresis cavity 32, so that the light emitted by the light-emitting diode 20 can be emitted through the electrophoresis cavity 32.
[0041] The electrophoresis chamber 32 may include two openings. The first electrode layer 31, the electrophoresis chamber 32, and the second electrode layer 33 are stacked sequentially. It can be understood that the first electrode layer 31 and the second electrode layer 33 are respectively arranged to correspond to the two openings of the electrophoresis chamber 32, so as to seal the two openings and form a sealed space in the cavity of the electrophoresis chamber 32. The sealed space can be filled with electrophoretic liquid 35 and electrophoretic particles 34. When one of the electrode layers of the first electrode layer 31 and the second electrode layer 33 is energized, the electrophoretic particles 34 can gather in the electrophoretic liquid towards 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 and emit it through the side where the unenergized electrode layer is located.
[0042] like Figures 1 to 4 As shown, the 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, thereby enabling the electrophoretic particles 34 to gather in the electrophoretic liquid towards the side where the energized electrode layer is located and form a corresponding reflective layer.
[0043] It is understood that the electrophoretic particles 34 in this application can aggregate towards the first electrode layer 31 or the second electrode layer 33 according to the change in the 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.
[0044] Both the first electrode layer 31 and the second electrode layer 33 can be transparent conductive layer structures so that the light emitted by the light-emitting diode 20 can be emitted through the first electrode layer 31 or the second electrode layer 33.
[0045] In some embodiments, the first electrode layer 31 and the second electrode layer 33 may be transparent conductive layer structures made of materials such as indium tin oxide.
[0046] The electrophoretic solution 35 can be a high-transmittance electrophoretic solution to reduce the energy loss of light emitted by the light-emitting diode 20 during transmission in the electrophoretic solution 35.
[0047] The aforementioned light-emitting diode 20 can be a cuboid structure, and the electrophoresis cavity 32 can include an upper cavity and a lower cavity corresponding to the light-emitting diode 20. The electrophoresis cavity 32 also includes 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.
[0048] In this embodiment, by energizing one of the first electrode layers 31 and the second electrode layer 33, the electrophoretic particles 34 can be aggregated on the energized electrode layer to form a corresponding reflective layer. The light emitted by the light-emitting diode 20 is then reflected by the reflective layer and directed to the side where the unenergized electrode layer is located, and emitted through the unenergized 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, which requires two independent display panels to realize the dual-sided display function of electronic devices, the thickness of the display panel can be effectively reduced, and the cost of the display panel thickness can be reduced.
[0049] For example, when the first display surface 11 is displayed, the second electrode layer 33 can be energized so that the electrophoretic particles 34 gather on 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 emitted from the side where the first electrode layer 31 is located, thus forming a lit display effect on the first display surface 11; when the second display surface 12 is displayed, the first electrode layer 31 can be energized so that the electrophoretic particles 34 gather on 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 emitted from the side where the second electrode layer 33 is located, thus forming a lit display effect on the second display surface 12.
[0050] like Figure 5 As shown, the electrophoretic particle 34 includes a particle body 341 and a reflective layer structure 342 that surrounds the particle body 341. By setting the reflective layer structure 342, the reflection efficiency of the electrophoretic particle 34 can be improved.
[0051] Among them, the reflective layer structure 342 can be an organic or inorganic coating with high reflectivity, such as a metallic silver coating; the particle body 341 can be an organic or inorganic electrophoretic material, such as titanium dioxide.
[0052] like Figure 6 As shown, the electrophoretic particle 34 also includes a protective layer 343, which wraps around the reflective layer structure 342. By providing the protective layer 343, the impact deformation of the reflective layer structure 342 after prolonged use of the electrophoretic particle 34 can be reduced, and the reflection effect of the reflective layer formed by the electrophoretic particle 34 on the light emitted by the light-emitting diode 20 can be decreased. The protective layer 343 can be an organic coating, such as a resin layer.
[0053] like Figure 7 As shown, 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 stacked together, and the light-emitting diode 20 can be a vertical structure.
[0054] 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 multiple quantum well structure; the P-type semiconductor can be connected to the positive terminal of the power supply, that is, the third electrode layer 21 can be connected to the positive terminal of the power supply; the N-type semiconductor can be connected to the negative terminal of the power supply, that is, the fourth electrode layer 25 can be connected to the negative terminal of the power supply.
[0055] In some implementations, the light-emitting diode 20 can also be a conventional or flip-chip structure.
[0056] like Figure 8 As shown, the light-emitting diode 20 can be disposed through the electrophoresis structure 30. Specifically, the light-emitting diode 20 can be disposed through the electrophoresis cavity 32, and the light-emitting layer 23 is located inside the electrophoresis cavity 32. With this arrangement, the light emitted by the light-emitting diode 20 can be emitted through the first electrode layer 31 or the second electrode layer 33 to meet the double-sided display requirements of the display panel.
[0057] Optionally, both the first electrode layer 31 and the second electrode layer 33 are touch-sensing layers, meaning that both the first electrode layer 31 and the second electrode layer 33 have touch-sensing functionality and can be used as touch function layers for the display panel. This arrangement avoids the need for a separate touch-sensing layer, further reducing the stacking thickness of the display panel.
[0058] For example, 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 so that the first electrode layer 31 serves as the touch sensing layer of the display panel; 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 so that the second electrode layer 33 serves as the touch sensing layer of the display panel.
[0059] 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 types of touch sensing layers, as long as they can realize the touch sensing function of the display panel.
[0060] Furthermore, in this 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-division multiplexed with the electrophoresis function. Specifically, when the first electrode layer 31 is energized and an aggregate 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 an aggregate 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.
[0061] like Figure 9 and Figure 10 As shown, the capacitive touch structure in the first electrode layer 31 or the second electrode layer 33 includes a touch horizontal sensing channel 71 and a touch vertical sensing channel 72. When a finger touches the screen, the capacitive sensing of the contact position changes, and the coordinates of the contact position are located, thereby realizing the touch function of the display panel.
[0062] like Figure 10 As shown, the first electrode layers 31 of each LED 20 can be connected through the connection channel 50 to form a touch sensing channel for the display panel; correspondingly, the second electrode layers 33 of each LED 20 can also be connected through the corresponding connection channel to form a touch sensing channel for the display panel.
[0063] In addition, the touch sensing channel can be electrically connected to the touch chip of the display panel. The touch chip can determine which side of the display panel is to be used based on the signal collected by the touch sensing channel, and output touch signals to the electrode layer on the side of the display panel to enable touch sensing function, and output electrophoresis control signals to the other side to make the electrophoretic particles 34 in the electrophoresis chamber 32 gather toward that side and form a corresponding reflective layer.
[0064] In some implementations, 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 into the motherboard of the electronic device, and the display panel can be electrically connected to the motherboard of the electronic device.
[0065] like Figure 11 and Figure 12 As shown, the light-emitting diode 20 and the electrophoretic structure 30 are an integrated structure, and the integrated light-emitting diode 20 and the electrophoretic structure 30 can be disposed as a whole on the display panel body 10.
[0066] The aforementioned light-emitting diode 20 and electrophoretic structure 30 are an integrated structure and can be directly mounted on the display panel body 10 as independent devices. Compared to first mounting the light-emitting diode 20 on the display panel body 10 and then mounting the electrophoretic structure 30 corresponding to the light-emitting diode 20, the assembly process of the display panel can be effectively simplified.
[0067] Specifically, for the integrated structure of the light-emitting diode 20 and the electrophoretic structure 30, a corresponding contact layer 60 can be provided on the electrode layer of the electrophoretic structure 30 so that the electrode layer can be 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.
[0068] It is understood that the first electrode layer 31 and the second electrode layer 33 of the electrophoretic structure 30 are each provided with a corresponding contact layer 60, and the contact layer 60 can be located at the edge 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.
[0069] This application also provides an electronic device, including the above-described display panel.
[0070] It should be noted that the implementation method of the above-described display panel embodiment is also applicable to the embodiment of the electronic device and can achieve the same technical effect, so it will not be described again here.
[0071] Among them, the aforementioned electronic devices can display mobile phones on both sides, foldable mobile phones, etc.
[0072] In some implementations, the electronic device can be as follows: Figure 13 The folding phone 200 shown includes a first folding portion 210 and a second folding portion 220. The first folding portion 210 includes the aforementioned display panel so that both the front and back of the first folding portion 210 can be displayed.
[0073] Specifically, when the folding phone 200 is unfolded, the inner screen 211 of the first folding part 210 displays, and when the folding phone 200 is closed, the outer screen 212 of the first folding part 210 displays.
[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0075] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A display panel, characterized in that, include: The display panel body includes a first display surface and a second display surface disposed opposite to each other. Light-emitting diodes (LEDs) are disposed on the display panel body; as well as, An electrophoretic structure is disposed on the display panel body and located between the first display surface and the second display surface. The electrophoretic structure includes a first electrode layer, an electrophoretic cavity and a second electrode layer stacked sequentially. The electrophoretic cavity is disposed corresponding to the light-emitting diode. The first electrode layer is disposed on the side where the first display surface is located, and the second electrode layer is disposed on the side where the second display surface is located. The electrophoretic cavity is filled with electrophoretic liquid (35) and electrophoretic particles. When displayed on the first display surface, the electrophoretic particles aggregate on the second electrode layer and form a first reflective layer; When displayed on the second display surface, the electrophoretic particles aggregate on the first electrode layer and form a second reflective layer.
2. The display panel according to claim 1, characterized in that, When the first display surface is in use, the electrophoretic particles gather on the second electrode layer and form a first reflective layer, and the first electrode layer serves as the touch sensing layer of the display panel.
3. The display panel according to claim 1, characterized in that, When displayed on the second display surface, the electrophoretic particles gather on the first electrode layer and form a second reflective layer, and the second electrode layer serves as the touch sensing layer of the display panel.
4. The display panel according to any one of claims 1 to 3, characterized in that, The electrophoretic particle includes a particle body and a reflective layer structure that surrounds the particle body.
5. The display panel according to claim 4, characterized in that, The electrophoretic particles also include a protective layer that encapsulates the reflective layer structure.
6. The display panel according to claim 4, characterized in that, The reflective layer structure is a metallic silver plating layer that surrounds the particle body.
7. The display panel according to claim 1, characterized in that, The display panel further includes a driving circuit, which 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, characterized in that, The light-emitting diode has a vertical structure and includes a third electrode layer, a first semiconductor layer, a light-emitting layer, a second semiconductor layer, and a fourth electrode layer stacked together.
9. The display panel according to claim 8, characterized in that, The light-emitting diode is disposed through the electrophoresis chamber, and the light-emitting layer is located inside the electrophoresis chamber.
10. An electronic device, characterized in that, Includes the display panel as described in any one of claims 1 to 9.