Display panel and display device

Abstract

The application discloses a display panel and a display device, and relates to the technical field of display. The display panel comprises a cover plate, a light guide assembly and at least two display modules. The at least two display modules are arranged below the cover plate. The display module comprises a display layer. The display layer comprises a bending area. The bending areas of two adjacent display modules are oppositely arranged and abutted. The cover plate and the two abutting bending areas form a splicing area. The bending area in the splicing area comprises a plurality of first light emitting units. The light guide assembly is arranged in the splicing area. The light guide assembly is configured to conduct light emitted by the plurality of first light emitting units to the cover plate and emit the light from the cover plate. The display panel can guarantee display effect without seams.

Description

Technical Field

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

[0002] With the development of display technology, the demand for in-vehicle screens and outdoor large-screen displays is constantly increasing. Splicing display devices can combine multiple displays to form ultra-large-size splicing screens according to actual display needs, offering advantages such as clear image display, high flexibility, and the ability to handle irregular arrangements, providing more functions and better display effects. Therefore, splicing display devices are receiving increasing attention.

[0003] There is a need to develop a display panel and display device to solve the problem of gaps at the splicing points affecting the display effect. Summary of the Invention

[0004] The purpose of this invention is to provide a display panel and display device that can guarantee display effect without seams.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A display panel, comprising:

[0007] Cover plate;

[0008] At least two display modules are disposed below the cover plate. Each display module includes a display layer and a bending area. The bending areas of two adjacent display modules are disposed opposite to each other and abut against each other. The cover plate and the two abutting bending areas together form a splicing area. The bending area located in the splicing area includes a plurality of first light-emitting units.

[0009] A light guide assembly is disposed in the splicing area and is configured to guide the light emitted by the plurality of first light-emitting units to the cover plate and be emitted from the cover plate.

[0010] In some embodiments, the light guide assembly includes a plurality of lenses disposed in the bending region, the first light-emitting unit includes a plurality of sub-pixels, and each lens is configured to refract light emitted by at least one of the sub-pixels toward the cover plate.

[0011] In some embodiments, the lens is hemispherical, elliptical, or teardrop-shaped.

[0012] In some embodiments, along the bending direction of the bending region, as the bending angle of the bending region increases, the end of the lens corresponding to the larger bending angle of the bending region gradually becomes thicker, and the near end of the lens corresponding to the smaller bending angle of the bending region gradually becomes thinner.

[0013] Preferably, the lens is semi-teardrop shaped.

[0014] In some embodiments, the light guide assembly further includes a plurality of light guide elements, which are spaced apart along the bending direction of the bending area. A plurality of lenses spaced apart along a direction perpendicular to the bending direction of the bending area form a lens group. One end of each light guide element abuts against at least one lens in the same lens group, and the other end of each light guide element extends toward the cover plate.

[0015] Preferably, the light guide is an OCR adhesive or an encapsulating adhesive;

[0016] Preferably, the thickness of the light guide is 18–20 μm.

[0017] In some embodiments, the projection of the lens along the thickness direction of the display panel falls within the corresponding light guide;

[0018] Preferably, the projection area of ​​the lens along the thickness direction of the display panel is smaller than the projection area of ​​the light guide along the thickness direction of the display panel.

[0019] In some embodiments, the thickness of the light guide gradually decreases from both ends of the splicing area toward the centerline of the splicing area.

[0020] In some embodiments, the light guide assembly further includes a plurality of reflective elements, which are attached to the sidewall of the light guide and have their reflective surfaces facing the light guide.

[0021] Preferably, the reflective element is made of nano-silver microparticles;

[0022] Preferably, the thickness of the reflective element is 3-5 μm.

[0023] In some embodiments, the light guide assembly further includes a light shield, which is disposed in the gap between two adjacent reflectors, and a light guide path extending in a vertical direction is formed between the two adjacent light shields.

[0024] Preferably, the light-shielding element is made of PDL light-shielding adhesive;

[0025] Preferably, the thickness of the light-shielding element is 2-5 μm.

[0026] A display device includes the aforementioned display panel.

[0027] The beneficial effects of this invention are:

[0028] This invention provides a display panel and a display device. In the display panel, the display layer of the display module is bent to form a bent area, and the bent area has multiple first light-emitting units. Since the bent areas of two adjacent display modules are arranged opposite to each other and abut against each other, the splicing area between the two display modules can emit light normally without any splicing gaps. The light guide component can conduct the light emitted by the multiple first light-emitting units to the cover plate and then emit it from the cover plate, thereby ensuring a normal display effect. Attached Figure Description

[0029] Figure 1 This is a top view of the display panel provided by the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the display panel provided by the present invention;

[0031] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0032] In the picture:

[0033] 1. Cover plate; 2. Display module; 3. Light guide assembly; 4. Splicing area; 5. Optical adhesive layer;

[0034] 21. Display layer; 22. First light-emitting unit; 23. Polarizing layer; 31. Lens; 32. Light guide; 33. Reflector; 34. Light shield;

[0035] 211. Bend area. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below. 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 intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0038] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0039] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] This embodiment provides a display device, which includes a display panel and a housing. The housing has a receiving groove, and the display panel is fixedly disposed in the receiving groove. In this embodiment, the display device is a splicing display device, such as a vehicle-mounted multi-screen display, so that the display device can provide driving information display for the driver and entertainment functions for the passenger sitting in the front passenger seat.

[0042] like Figure 1 As shown, the display panel includes a cover plate 1 and at least two display modules 2. The at least two display modules 2 are disposed below the cover plate 1 to form a display device. The outer shell can be customized according to the actual use, and the outer contour of the display module 2 also needs to be customized according to the outer shell to ensure the overall appearance.

[0043] Currently, video wall display devices on the market are mainly divided into two categories: LED video wall and LCD / OLED video wall. Although LED video wall can achieve seamless splicing, its lower resolution cannot meet the requirements for high resolution. For LCD and conventional OLED screen splicing, the display screen has bezels. After multiple screens are spliced, there are black gaps at the splicing points between adjacent bezels. When displaying images, the bezel area cannot display the image due to the wiring and ink obscuring it, resulting in a fragmented image and affecting the display effect.

[0044] To solve the above problems, such as Figure 1 and Figure 2 As shown, in the display panel provided in this embodiment, the display module 2 includes a display layer 21, which is provided with multiple light-emitting units. The display layer 21 includes a bending area 211. The bending areas 211 of two adjacent display modules 2 are arranged opposite to each other and abut against each other. The cover plate 1 and the two abutting bending areas 211 together form a splicing area 4. Since the bending area 211 of the display module 2 is formed by bending the display layer 21, the bending area 211 located in the splicing area 4 includes multiple light-emitting units and can emit light normally. For ease of description, the light-emitting units outside the bending area 211 are referred to as the second light-emitting unit, while the light-emitting units in the bending area 211 are referred to as the first light-emitting unit 22.

[0045] In some embodiments, both the first light-emitting unit 22 and the second light-emitting unit are made of activatable light-emitting materials, and the image displayed on the display layer 21 is formed by the first light-emitting unit 22 and the second light-emitting unit emitting light of different colors at different positions. Specifically, both the first light-emitting unit 22 and the second light-emitting unit are pixel units, and each pixel unit is composed of multiple sub-pixels. In this embodiment, the pixel unit includes three sub-pixels: R (red), G (green), and B (blue). In other embodiments, the pixel unit may also include sub-pixels of other colors, such as W (white).

[0046] In this display panel, since the bending areas 211 of two adjacent display modules 2 are arranged opposite each other and abut against each other, the portion of the two display modules 2 located in the splicing area 4 (bending areas 211) can display the image normally through the first light-emitting unit 22, and there is no splicing gap. In other embodiments, the display panel may include multiple display modules 2, with bending areas 211 provided at both ends of the display module 2 located in the middle position, thus achieving the effect of multi-screen splicing without seams.

[0047] However, since the display layer 21 forms a bending area 211 by bending, there is an angle between the bending area 211 and the cover plate 1. This causes the light emitted by the first light-emitting unit 22 of the bending area 211 to be unable to pass directly through the cover plate 1, but to be reflected in the splicing area 4 and interfere with each other, affecting the display effect of the splicing area 4.

[0048] To address the aforementioned issues, the display panel further includes a light guide component 3, which is positioned within the splicing area 4. The light guide component 3 is configured to guide the light emitted by the multiple first light-emitting units 22 to the cover plate 1 and then emit it from the cover plate 1. Therefore, from the user's perspective, it appears as if the splicing area 4 is emitting light normally, thus ensuring a normal display effect.

[0049] It is understandable that the light emitted by the first light-emitting unit 22 and the second light-emitting unit is basically perpendicular to the display layer 21. However, due to the angle between the bending area 211 and the cover plate 1, the light emitted by the first light-emitting unit 22 cannot be directly emitted through the cover plate 1 for display.

[0050] like Figure 3 As shown, to solve the above problems, the light guide assembly 3 includes a plurality of lenses 31 disposed in the bending area 211, and each lens 31 is configured to refract light emitted by at least one sub-pixel toward the cover plate 1.

[0051] It is understandable that either one lens 31 corresponds to one sub-pixel, meaning the light emitted by each sub-pixel is refracted through a corresponding lens 31, or one lens 31 corresponds to multiple first light-emitting units 22, meaning the light emitted by multiple first light-emitting units 22 is refracted through a corresponding lens 31. In this embodiment, the structure of the light guide component 3 is such that one lens 31 corresponds to one first light-emitting unit 22, meaning the light emitted by multiple sub-pixels of one first light-emitting unit 22 is refracted through a corresponding lens 31.

[0052] Specifically, as the angle between the bending area 211 and the cover plate 1 gradually increases along the direction of the abutment line between the two bending areas 211 (the center line B of the splicing area 4) along the bending area 211 of the display layer 21, that is, the bending angle of the bending area 211 increases, so the shape of the corresponding lens 31 also gradually changes.

[0053] In this embodiment, the bending degree of the edge of the bending area 211 is relatively small, and the lens 31 here is hemispherical. As the bending angle of the bending area 211 increases, the end of the lens 31 corresponding to the bending angle of the bending area 211 gradually becomes thicker, and the end of the lens 31 corresponding to the bending angle of the bending area 211 gradually becomes thinner. Therefore, the shape of the lens 31 is preferably semi-teardrop-shaped. It is worth noting that in this embodiment, the thinner end of the lens 31 is the end closer to the edge of the splicing area 4, and the thicker end of the lens 31 is the end of the lens 31 farther away from the edge of the splicing area 4. That is to say, the thicker end of the lens 31 is closer to the abutment line of the two bending areas 211 than the thinner end of the lens 31. In other embodiments, the general shape of the lens 31 can also be elliptical, so as to adjust the emitted light of the corresponding first light-emitting unit 22 as much as possible in the thickness direction of the display panel.

[0054] The light-emitting units of the display layer 21 are arranged in a matrix. For ease of description, multiple lenses 31 are arranged at intervals along the bending direction perpendicular to the bending direction of the bending area 211 to form a lens group. The light guide assembly 3 is arranged at intervals along the bending direction of the bending area 211 so that the lens 31 corresponds one-to-one with the first light-emitting unit 22 of the bending area 211.

[0055] like Figure 3 As shown, the light guide assembly 3 also includes multiple light guide elements 32, which are spaced apart along the bending direction of the bending area 211. One end of each light guide element 32 abuts against at least one lens 31 in the same lens group, and the other end extends toward the cover plate 1. The light guide elements 32 can conduct light, minimizing the loss of light emitted by the first light-emitting unit 22 before it reaches the cover plate 1, thereby increasing brightness and improving the display effect.

[0056] In this embodiment, the projection of the light guide 32 along the thickness direction of the display panel covers all the lenses 31 in the same lens group. Since the spacing between pixel units is small, providing a light guide 32 for each pixel unit is both difficult and unnecessary. However, using the light guide 32 to simultaneously guide the light emitted from multiple pixel units can greatly improve efficiency and reduce costs.

[0057] Specifically, the light guide 32 extends along the bending axis of the display layer 21 (X direction in the figure). It can be understood that the bending angles of the multiple first light-emitting units 22 arranged along the X direction are the same, and the light emitted by these first light-emitting units 22 is roughly parallel. The light emitted by these first light-emitting units 22 can be guided to the cover plate 1 through the same light guide 32 without interfering with each other.

[0058] like Figure 3 As shown, the projection of lens 31 along the thickness direction of the display panel falls within the corresponding light guide 32, preventing light leakage from lens 31 and ensuring that all light emitted by lens 31 enters the light guide 32.

[0059] Preferably, the projection area of ​​lens 31 along the thickness direction of the display panel is smaller than the projection area of ​​light guide 32 along the thickness direction of the display panel. Since the side of lens 31 away from the bending area 211 is curved, the projection of lens 31 along the thickness direction of the display panel falling within light guide 32 can ensure that the end of light guide 32 facing the bending area 211 has a certain thickness, avoiding the formation of bubbles or local thinness during the printing process, which would cause defects.

[0060] Specifically, as the degree of bending of the bending area 211 increases, the range of the orthographic projection of the first light-emitting unit 22 in the thickness direction of the display panel gradually decreases. Therefore, in order to match the first light-emitting unit 22, the thickness of the light guide 32 gradually decreases from both ends of the splicing area 4 toward the center line of the splicing area 4.

[0061] When the light emitted by the first light-emitting unit 22 is conducted in the light guide 32, the light that reaches the critical angle will be totally reflected by the side wall of the light guide 32 and remain inside the light guide 32, and finally be emitted through the cover plate 1. However, some light is emitted through the side wall of the light guide 32, which can easily interfere with other light guides 32, affect the display effect, and reduce the brightness of the emitted light.

[0062] In this embodiment, the light guide assembly further includes multiple reflectors 33, which are attached to the sidewall of the light guide 32, with the reflective surface of the reflectors 33 facing the light guide 32. The sidewall of the light guide 32 refers to the surface extending along the thickness direction of the display panel. The reflectors 33 attached to the sidewall of the light guide 32 can effectively reduce interference between the light guides 32 and allow all the light within the light guide 32 to pass through the cover plate 1, thus improving the display effect.

[0063] In this embodiment, the light guide 32 can use OCR (Optical Clear Resin) water-based adhesive or encapsulating adhesive, with a thickness (dimension along the direction perpendicular to the bending axis of the bending region 211) of 18–20 μm. The reflector 33 can use a reflective material of nano-silver microparticles, with a thickness (dimension along the direction perpendicular to the bending axis of the bending region 211) of 3–5 μm.

[0064] It is understandable that the display effect of a display panel is not only related to the luminous intensity, but also to the degree of reflection of ambient light. Since the display layer 21 has many metal components, if ambient light enters the display panel through the cover plate 1 and is reflected by the metal components of the display layer 21, the ambient light will also be observed by the user, reducing the display effect.

[0065] To address this issue, the light guide assembly 3 further includes a light-shielding member 34, which is disposed in the gap between two adjacent reflectors 33, forming a vertically extending light guide path between the two adjacent light-shielding members 34. Since the light guide members 32 completely cover at least one lens 31, there is no light-emitting structure in the gap between the light guide members 32. Therefore, placing the light-shielding member 34 in the gap between the light guide members 32 will not affect the light-emitting effect of the first light-emitting unit 22. Moreover, the light-shielding member 34 can reduce the total amount of ambient light entering the display panel, thereby reducing the amount of ambient light reflection and improving the display effect.

[0066] The light-shielding element 34 is made of PDL (Pixel Define Layer) light-shielding adhesive, which reduces ambient light reflection. Its thickness (the dimension along the direction perpendicular to the bending axis of the bending area 211) is 2-5 μm.

[0067] To further reduce the amount of ambient light reflected, in this embodiment, the display panel also includes a polarizing layer 23. The polarizing layer 23 is disposed between the display layer 21 and the cover plate 1. Ambient light passing through the polarizing layer 23 will be partially blocked by the polarizing layer 23, reducing the total amount of ambient light entering the display panel. After the ambient light entering the display panel is reflected, its rotation direction changes, causing it to be unable to exit the polarizing layer 23, thereby greatly reducing the amount of ambient light reflected and improving the display effect.

[0068] To ensure the stability of the connection between the display panel and the display module 2, the display panel also includes an optical adhesive layer 5, which is disposed between the cover plate 1 and the display module 2. Specifically, the optical adhesive layer 5 is located between the polarizing layer 23 and the cover plate 1.

[0069] Preferably, the light guide component 3 abuts against the optical adhesive layer 5. Since the optical adhesive layer 5 is bonded to the cover plate 1, the abutment between the light guide component 3 and the optical adhesive layer 5 ensures that the light emitted by the first light-emitting unit 22 is transmitted through the light guide component 3 and emitted from the cover plate 1, reducing losses.

[0070] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A display panel, characterized in that, include: Cover plate; At least two display modules are disposed below the cover plate. Each display module includes a display layer and a bending area. The bending areas of two adjacent display modules are arranged opposite to each other and abut against each other to achieve the effect of multi-screen splicing without seams. The cover plate and the two abutting bending areas together form a splicing area. The bending area located in the splicing area includes a plurality of first light-emitting units. A light guide assembly is disposed in the splicing area and is configured to guide the light emitted by the plurality of first light-emitting units to the cover plate and be emitted from the cover plate. The light guide assembly includes multiple lenses disposed in the bending area. The first light-emitting unit includes multiple sub-pixels. Each lens is configured to refract light emitted by at least one sub-pixel toward the cover plate. The thinner end of the lens is the end near the edge of the splicing area, and the thicker end of the lens is the end away from the edge of the splicing area. The light guide assembly further includes multiple light guide elements, which are spaced apart along the bending direction of the bending area. Multiple lenses spaced apart along a direction perpendicular to the bending direction of the bending area form a lens group. One end of each light guide element abuts against one of the lenses in the same lens group, and the other end of each light guide element extends toward the cover plate.

2. The display panel according to claim 1, characterized in that, The lens is hemispherical, elliptical, or teardrop-shaped.

3. The display panel according to claim 1, characterized in that, The light guide is an OCR water-based adhesive or an encapsulating adhesive; The thickness of the light guide is 18~20μm.

4. The display panel according to claim 1, characterized in that, The projection of the lens along the thickness direction of the display panel falls within the corresponding light guide; The projection area of ​​the lens along the thickness direction of the display panel is smaller than the projection area of ​​the light guide along the thickness direction of the display panel.

5. The display panel according to claim 1, characterized in that, The thickness of the light guide gradually decreases from both ends of the splicing area toward the centerline of the splicing area.

6. The display panel according to claim 1, characterized in that, The light guide assembly also includes a plurality of reflective elements, which are attached to the sidewall of the light guide assembly, with the reflective surface of the reflective elements facing the light guide assembly; The reflective element is made of nano-silver microparticles; The thickness of the reflective element is 3-5 μm.

7. The display panel according to claim 6, characterized in that, The light guide assembly also includes a light shield, which is disposed in the gap between two adjacent reflectors, and a light guide path extending in the vertical direction is formed between the two adjacent light shields. The light-shielding component is made of PDL light-shielding adhesive; The thickness of the light-shielding element is 2-5 μm.

8. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 7.

Images