Display panel and display device

Abstract

The invention discloses a display panel and a display device, the display panel comprises a back plate, a light-emitting layer and a protective layer, the light-emitting layer is arranged on one side of the back plate, and the light-emitting surface of the light-emitting layer is arranged away from the back plate; the protective layer is arranged on one side of the light-emitting surface of the light-emitting layer and is filled with filler, and the filler is used for improving the haze of the protective layer. In this way, the packaging effect of the display panel can be improved, and side light leakage can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] Micro-LED display panel has the advantages of lighter, higher resolution, lower power consumption, higher brightness, faster reaction time, larger viewing angle, etc., and solves the problems of needing to match the backlight module for adjustment, poor black contrast, etc. During a long-term research and development process, the applicant of the present application found that the Micro-LED display panel packaging film has the problems of poor packaging effect and side light leakage. SUMMARY

[0003] The technical problem solved by the present application is to provide a display panel and a display device, which can improve the packaging effect of the display panel and reduce side light leakage.

[0004] To solve the above technical problems, one technical solution adopted by the present application is to provide a display panel, comprising: a back plate; a light emitting layer arranged on one side of the back plate, wherein the light emitting layer has an outlight surface arranged away from the back plate; and a protective layer arranged on one side of the outlight surface of the light emitting layer, wherein the protective layer is filled with a filler, and the filler is used to improve the haze of the protective layer.

[0005] Preferably, the shape of the filler includes at least one of a sheet shape, a spherical shape or a columnar shape; preferably, the length of the filler ranges from 50 microns to 100 microns, the width of the filler ranges from 50 microns to 100 microns, and the height of the filler ranges from 3 microns to 5 microns.

[0006] Preferably, the refractive index of the protective layer differs from the refractive index of the filler by 0.1 to 0.4; preferably, the haze of the protective layer is above 80%; and preferably, the material of the protective layer includes polyethylene terephthalate.

[0007] Preferably, the material of the filler includes inorganic material; preferably, the inorganic material includes at least one of mica sheet, hydrotalcite and glass flake; preferably, the filling content of the inorganic material in the protective layer ranges from 1% to 5%; and preferably, the refractive index of the inorganic material ranges from 1.4 to 1.6.

[0008] Preferably, the material of the filler includes organic material; preferably, the organic material includes at least one of nylon and ethylene-vinyl alcohol copolymer; and preferably, the filling amount of the organic material in the protective layer ranges from 15% to 30%.

[0009] The display panel further includes a barrier layer disposed between the light-emitting layer and the protective layer; preferably, the barrier layer is made of an inorganic material; preferably, the barrier layer is made of at least one of aluminum oxide and silicon oxide. Preferably, the display panel further includes an adhesive layer disposed between the light-emitting layer and the barrier layer; preferably, the adhesive layer is made of an optical adhesive.

[0010] The display panel further includes an optical functional layer disposed on the side of the protective layer opposite to the light-emitting layer.

[0011] The filler is in the form of sheets, and the arrangement direction of the filler is parallel to that of the light-emitting layer.

[0012] The backplate includes a driving layer and a substrate, and the substrate, the driving layer and the light-emitting layer are stacked sequentially in the direction close to the protective layer.

[0013] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a display device, including a display panel as described in any of the above claims.

[0014] The beneficial effects of this application are as follows: Unlike existing technologies, this application fills the protective layer with a filler to enhance its haze. In existing technologies, because the protective layer is a transparent film, light from the display panel is repeatedly reflected within it. When light exits the protective layer from the side of the display panel, the light intensity is high, resulting in light leakage. However, this application fills the protective layer with a filler to enhance its haze. As a result, a portion of the light emitted from the side is absorbed by the filler, while the remaining portion is refracted multiple times on the filler surface and lost, thus reducing the intensity of the light emitted from the side and ultimately alleviating the side light leakage phenomenon. This improves the defect of white edges at the splicing edges of the display panel. Furthermore, the filler in the protective layer also enhances the water and oxygen barrier effect of the display panel, extending its lifespan. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0016] Figure 1 This is a schematic diagram of the structure of one embodiment of the display panel of this application;

[0017] Figure 2 yes Figure 1 Schematic diagram of the structure of the backplate and the light-emitting layer;

[0018] Figure 3 This is a schematic diagram of another embodiment of the display panel of this application;

[0019] Figure 4 This is a schematic diagram of one embodiment of the display device of this application. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] In existing technologies, because the protective layer is a transparent film, light from the display panel is repeatedly reflected within it. When light exits the protective layer from the side of the display panel, the light intensity is high, resulting in light leakage as a visual effect. The displayed image is then output through the display panel, resulting in white borders at the corresponding positions on the final image. These multiple white borders visually divide the image into several parts, preventing a complete image from being presented and affecting the user's visual experience. This application proposes the following technical solution to improve the aforementioned problem of white borders at splicing points:

[0022] See Figure 1 The display panel 1 includes a backplate 11, a light-emitting layer 113, and a protective layer 12. The light-emitting layer 113 is disposed on one side of the backplate 11, and the light-emitting surface of the light-emitting layer 113 is disposed away from the backplate 11. Specifically, the backplate 11 drives the light-emitting layer 113. The display panel 1 of this application can be an OLED display panel (Organic Light Emitting Diode), an LCD display panel (Liquid Crystal Display), a Micro-LED display panel (Micro Light Emitting Diode), or other types of display panels. This application does not limit the specific type of the display panel 1.

[0023] See Figure 2The back panel 11 includes a driving layer 112 and a substrate 111. The substrate 111, driving layer 112, and light-emitting layer 113 are sequentially stacked in the direction near the protective layer 12. Specifically, the light-emitting layer 113 includes a light-emitting element 1131, and the driving layer 112 includes a driving circuit. The light-emitting element 1131 is electrically connected to the driving circuit, thereby driving the light-emitting element 1131 to emit light. The substrate 111 plays a supporting role in the display panel 1. It can be a flexible substrate or a rigid substrate. When the substrate 111 is a flexible substrate, its material can be polyimide (PI); when the substrate 111 is a rigid substrate, its material can be glass or metal. This application does not limit the structure of the substrate 111.

[0024] The protective layer 12 is disposed on the light-emitting surface side of the light-emitting layer 113. The protective layer 12 encapsulates the light-emitting layer 113. On the one hand, when subjected to external force, the protective layer 12 can absorb and diffuse the impact of the external force, thereby reducing the external force on the display panel 1, reducing the damage caused by the external force to the display panel 1, and improving the protection of the display panel 1. On the other hand, the protective layer 12 can also prevent external water and oxygen from invading the interior of the display panel 1, thereby improving the water and oxygen resistance of the display panel 1.

[0025] In this embodiment, the protective layer 12 is filled with filler 13, which is used to improve the haze of the protective layer 12.

[0026] Specifically, haze refers to the percentage of transmitted light intensity that deviates from the incident light angle by more than 2.5° out of the total transmitted light intensity. It should be noted that haze is related to, but not positively related to, light transmittance. In this application, filling the protective layer 12 with filler 13 to improve the haze of the protective layer 12 does not mean that the light transmittance of the protective layer 12 is reduced.

[0027] In the prior art, because the protective layer 12 is a transparent film, the light from the display panel 1 is repeatedly reflected within the protective layer 12. When light exits the protective layer 12 from the side of the display panel 1, the light intensity is high, resulting in light leakage and white edges at the seams, affecting the visual effect. This application fills the protective layer 12 with a filler 13. The filler 13 increases the haze of the protective layer 12, so that a portion of the light emitted from the side is absorbed by the filler 13, and the remaining portion is refracted and lost multiple times on the surface of the filler 13, thereby reducing the intensity of the light emitted from the side. This ultimately alleviates the side light leakage phenomenon, making the light on the display panel 1 more uniform, increasing the viewing angle range, improving color shift issues, and effectively improving the white edge problem at the seams of the display panel 1. Furthermore, the filler 13 in the protective layer 12 of this application can also block external water and oxygen, improving the water and oxygen barrier effect of the display panel 1 and extending its service life.

[0028] In one embodiment, if the protective layer 12 is not filled with filler 13, the haze of the protective layer 12 is less than 5%, while after filling with filler 13, the haze of the protective layer 12 is greater than or equal to 80%.

[0029] The filler 13 can be in the shape of at least one of sheet, sphere, or column. For example, in one embodiment, the filler 13 is spherical; in another embodiment, it is columnar; in yet another embodiment, it is sheet-like; and in still another embodiment, some filler 13 is sheet-like and some is spherical. When the filler 13 is sheet-like, it effectively improves the white edge problem of the splicing of the display panel 1. The light emitted by the light-emitting layer 113 is refracted by the filler in the protective layer 12, reducing the intensity of the light emitted from the side and thus reducing light leakage. In other embodiments, the filler 13 can also be disc-shaped or other irregular shapes. This application does not limit the shape of the filler 13.

[0030] In one embodiment, the length of the filler 13 ranges from 50 micrometers to 100 micrometers, the width of the filler 13 ranges from 50 micrometers to 100 micrometers, and the height of the filler 13 ranges from 3 micrometers to 5 micrometers. Specifically, the length can be 50 micrometers, 60 micrometers, 70 micrometers, 80 micrometers, 90 micrometers, or 100 micrometers, the width can be 50 micrometers, 60 micrometers, 70 micrometers, 80 micrometers, 90 micrometers, or 100 micrometers, and the height can be 3 micrometers, 4 micrometers, or 5 micrometers. The dimensions of the filler 13 can be selected according to actual conditions, and this application does not impose any limitations.

[0031] In one embodiment, the refractive index of the protective layer 12 differs from that of the filler 13 by 0.1 to 0.4. Specifically, the refractive index of the protective layer 12 differs from that of the filler 13 by 0.1, 0.2, 0.3, or 0.4. It should be noted that this application does not limit the difference between the refractive index of the protective layer 12 and the refractive index of the filler 13. The refractive index of the protective layer 12 can be greater than or less than that of the filler 13, as long as the refractive index of the protective layer 12 and the refractive index of the filler 13 are not equal.

[0032] In one embodiment, the haze of the protective layer 12 is above 80%. Specifically, the haze of the protective layer 12 is 80%, 85%, 90%, or 95%. This application does not limit the haze of the protective layer 12.

[0033] In one embodiment, the material of the protective layer 12 includes polyethylene terephthalate (PET), that is, in this embodiment, filler 13 is filled into the PET. Polyethylene terephthalate has good optical transparency, which can effectively transmit light without affecting the brightness and color performance of the display panel 1. It has excellent physical and mechanical properties over a wide temperature range, with an operating temperature up to 120°C. It has excellent electrical insulation properties, and its electrical properties remain good even at high temperatures and high frequencies. However, it has poor corona resistance. It also has good creep resistance, fatigue resistance, abrasion resistance, and dimensional stability, which can provide sufficient mechanical support and impact resistance for the display panel 1.

[0034] In one embodiment, the filler 13 is made of an inorganic material. This inorganic material may include at least one of mica flakes, hydrotalcite, and glass flakes. That is, the filler 13 may be made of one or more of these materials. For example, the filler 13 may consist only of mica flakes, or it may be a mixture of mica flakes and hydrotalcite.

[0035] When the filler 13 contains inorganic materials, the content of inorganic materials in the protective layer 12 is between 1% and 5%. For example, the content of inorganic materials in the protective layer 12 can be 1%, 2%, 3%, 4%, or 5%. It should be noted that this application does not limit the content of inorganic materials.

[0036] When the filler 13 is made of inorganic material, the refractive index of the inorganic material is in the range of 1.4 to 1.6. Specifically, the refractive index of the inorganic material can be 1.4, 1.45, 1.5, 1.55 or 1.6. This application does not limit the refractive index of the inorganic material.

[0037] In another embodiment, the filler 13 is made of an organic material. This organic material includes at least one of nylon and ethylene vinyl alcohol copolymer. That is, the filler 13 can include one or more of nylon and ethylene vinyl alcohol copolymer. For example, the filler 13 may be made of only nylon, or it may be a mixture of ethylene vinyl alcohol copolymer and nylon.

[0038] When the filler 13 contains organic materials, the amount of organic materials in the protective layer 12 ranges from 15% to 30%. For example, the amount of organic materials in the protective layer 12 can be 15%, 17%, 20%, 25%, or 30%. It should be noted that this application does not limit the amount of organic materials.

[0039] See Figure 3In another embodiment, the display panel 1 further includes a barrier layer 14, which is disposed between the light-emitting layer 113 and the protective layer 12 to block water vapor or oxygen in the external environment, prevent water vapor or oxygen from diffusing into the light-emitting element 1131 and the driving circuit, and ensure the display of the display panel 1.

[0040] In one embodiment, the material of the barrier layer 14 includes an inorganic material. Further, the material of the barrier layer 14 includes at least one of alumina, silicon oxide, and silicon nitride, that is, the material of the barrier layer 14 includes one or more of alumina, silicon oxide, and silicon nitride. For example, the material of the barrier layer 14 includes alumina, or includes silicon nitride, or may be a mixture of alumina and silicon oxide.

[0041] Of course, in other embodiments, the material of the barrier layer 14 may also include organic materials, or a mixture of organic and inorganic materials. In short, this application does not limit the material of the barrier layer 14.

[0042] Continue reading Figure 3 In one embodiment, the display panel 1 further includes an adhesive layer 15, which is disposed between the barrier layer 14 and the light-emitting layer 113. Specifically, the barrier layer 14 and the light-emitting layer 113 are tightly bonded together by the adhesive layer 15, effectively sealing the gap between the barrier layer 14 and the light-emitting layer 113 and preventing air, moisture or other media from entering.

[0043] In one embodiment, the adhesive layer 15 is made of optical adhesive, which is a special adhesive used for bonding optical components and has high transparency, low refractive index, excellent weather resistance and anti-aging properties. For example, the adhesive layer 15 can be a UV-curable adhesive, epoxy resin optical adhesive, silicone optical adhesive, acrylic optical adhesive or polyurethane optical adhesive.

[0044] Continue reading Figure 3 The display panel 1 also includes an optical functional layer 16, which is disposed on the side of the protective layer 12 opposite to the light-emitting layer 113. Specifically, the light from the light-emitting layer 113 passes through the optical functional layer 16, which can play the role of anti-reflection or low-reflection and anti-glare.

[0045] In one embodiment, the optical functional layer 16 may include at least one of an anti-reflection film, a low-reflection film, and an anti-glare film. For example, an anti-reflection film can effectively reduce light reflection, thereby reducing glare and improving display performance; a low-reflection film can significantly reduce surface reflection of the display panel, reduce glare, and improve visibility.

[0046] Continue reading Figure 1When the filler 13 is in sheet form, its arrangement direction is parallel to the light-emitting layer 113. Specifically, the filler 13 is in sheet form, and when the protective layer 12 is stretched into a film, the arrangement direction of the filler 13 is the same as the stretching direction of the protective layer 12. That is, the arrangement direction of the filler 13 in the protective layer 12 is perpendicular to the light emitted from the light-emitting layer 113. This allows the light to be refracted and lost multiple times on the surface of the filler 13, reducing the intensity of the side-emitted light and thus alleviating the side light leakage phenomenon. At the same time, it can also improve the water and oxygen barrier performance of the protective layer 12 and improve the overall reliability of the display panel 1.

[0047] See Figure 4 The display device 2 includes a display panel 1 as described in any of the above embodiments. Detailed structures can be found in the above embodiments and will not be repeated here. The display device 2 can be an electronic device such as a television, mobile phone, computer, or stage screen; this application does not limit its specific type.

[0048] In one embodiment, the display device 2 includes a plurality of display panels 1, which are spliced ​​together, and a protective layer 12 covers the display device 2 to improve the problem of white edges at the splicing of the display device 2.

[0049] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A display panel, characterized in that, include: Back panel; A light-emitting layer is disposed on one side of the back plate, with the light-emitting surface of the light-emitting layer facing away from the back plate; A protective layer is disposed on one side of the light-emitting surface of the light-emitting layer, and the protective layer is filled with filler to improve the haze of the protective layer.

2. The display panel according to claim 1, characterized in that, The shape of the filler includes at least one of sheet-like, spherical, and columnar shapes; Preferably, the length of the filler is in the range of 50 micrometers to 100 micrometers, the width of the filler is in the range of 50 micrometers to 100 micrometers, and the height of the filler is in the range of 3 micrometers to 5 micrometers.

3. The display panel according to claim 1, characterized in that, The refractive index of the protective layer differs from that of the filler by 0.1 to 0.4; Preferably, the haze of the protective layer is above 80%; Preferably, the material of the protective layer includes polyethylene terephthalate.

4. The display panel according to claim 1, characterized in that, The filler material includes inorganic materials; Preferably, the inorganic material includes at least one of mica flakes, hydrotalcite, and glass flakes; Preferably, the inorganic material in the protective layer has a filling content between 1% and 5%. Preferably, the refractive index of the inorganic material is in the range of 1.4 to 1.

6.

5. The display panel according to claim 1, characterized in that, The filler material includes organic materials; Preferably, the organic material includes at least one of nylon and ethylene-vinyl alcohol copolymer; Preferably, the amount of organic material in the protective layer ranges from 15% to 30%.

6. The display panel according to claim 1, characterized in that, The display panel also includes: A barrier layer is disposed between the light-emitting layer and the protective layer; Preferably, the material of the barrier layer includes inorganic materials; Preferably, the material of the barrier layer includes at least one of aluminum oxide and silicon oxide; Preferably, the display panel further includes an adhesive layer disposed between the light-emitting layer and the barrier layer; Preferably, the adhesive layer is made of optical adhesive.

7. The display panel according to claim 1, characterized in that, The display panel also includes: An optical functional layer is disposed on the side of the protective layer opposite to the light-emitting layer.

8. The display panel according to claim 1, characterized in that, The filler is in the form of sheets, and the arrangement direction of the filler is parallel to that of the light-emitting layer.

9. The display panel according to claim 1, characterized in that, The backplate includes a driving layer and a substrate, and the substrate, the driving layer and the light-emitting layer are stacked sequentially in the direction close to the protective layer.

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

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