Display panel and display terminal

Abstract

The invention discloses a display panel and a display terminal. The display panel comprises a substrate, a light emitting unit and a first packaging layer. The light-emitting surface of the light-emitting unit comprises a first surface and a first side wall; the first packaging layer comprises a plurality of first packaging parts and a plurality of second packaging parts, the first packaging parts cover the light-emitting surface, the second packaging parts are arranged between every two adjacent first packaging parts in a contact mode, and the interfaces of the first packaging parts and the second packaging parts are first interfaces; the refractive index of the first packaging part is larger than that of the second packaging part, and at least part of light emitted from the first side wall is totally reflected on the first interface. According to the display panel, the first packaging part and the second packaging part are arranged, at least part of light emitted from the first side wall can be totally reflected on the first interface, and the totally reflected light can be emitted from the light emitting side of the display panel, so that the utilization of the light emitted from the first side wall is increased, and the light emitting efficiency of the display panel is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to display panels and display terminals. Background Technology

[0002] Micro-LED display panels, in addition to their advantages such as self-illumination, high contrast, and low power consumption, can also achieve higher resolution, making them a promising candidate to become the light-emitting element for next-generation display panels. Micro-LED display panels can be applied to augmented reality (AR), virtual reality (VR), automotive head-up displays (HUDs), and wearable devices, among others.

[0003] Micro-LED display panels consist of multiple Micro-LED light-emitting chips. Because of their small size, in addition to surface-emitting light, some Micro-LEDs also emit light from the sides. This side-emitting light fails to exit through the display surface, reducing the light extraction efficiency of the display panel.

[0004] Therefore, improving the light emission efficiency of display panels is one of the technical problems that those skilled in the art urgently need to solve. Summary of the Invention

[0005] This application provides a display panel and a display terminal to solve the technical problem of how to improve the light emission efficiency of the display panel.

[0006] To solve the above-mentioned technical problems, the technical solution provided in this application is as follows:

[0007] This application provides a display panel, the display panel comprising:

[0008] substrate;

[0009] Multiple light-emitting units are disposed on one side of the substrate, and the light-emitting surface of the light-emitting unit includes a first surface and a first sidewall;

[0010] A first encapsulation layer is disposed on the same side of the substrate as the light-emitting unit. The first encapsulation layer includes a plurality of first encapsulation portions and a plurality of second encapsulation portions. The first encapsulation portions cover the light-emitting surface. The second encapsulation portions are contacted and disposed between two adjacent first encapsulation portions. The interface between the first encapsulation portions and the second encapsulation portions is a first interface. The second encapsulation portions are spaced apart from the light-emitting unit.

[0011] The refractive index of the first encapsulation part is greater than that of the second encapsulation part, and at least a portion of the light rays emitted from the first sidewall undergo total internal reflection at the first interface.

[0012] In the display panel of this application, the refractive index of the first encapsulation portion is 1.6 to 1.7, the refractive index of the second encapsulation portion is 1.4 to 1.5, and the angle between the first interface and the bottom wall of the second encapsulation portion is 55 degrees to 70 degrees.

[0013] In the display panel of this application, the display panel further includes a second encapsulation layer, which is disposed on the side of the first encapsulation layer away from the substrate. The second encapsulation layer includes a plurality of third encapsulation portions and a plurality of fourth encapsulation portions. The third encapsulation portions are disposed corresponding to the first encapsulation portions, and the fourth encapsulation portions are disposed corresponding to the second encapsulation portions. The interface between the third encapsulation portions and the fourth encapsulation portions is a second interface, and the angle between the second interface and the bottom wall of the fourth encapsulation portion is an obtuse angle.

[0014] In the display panel of this application, the refractive index of the third encapsulation portion is 1.6 to 1.7, the refractive index of the fourth encapsulation portion is 1.4 to 1.5, and the angle between the second interface and the bottom wall of the fourth encapsulation portion is 110 degrees to 120 degrees.

[0015] In the display panel of this application, a groove is provided on the side surface of the fourth encapsulation part facing away from the substrate, and a light-concentrating part is filled in the groove. The refractive index of the light-concentrating part is greater than the refractive index of the fourth encapsulation part.

[0016] In the display panel of this application, the longitudinal section of the light-concentrating part includes an inverted triangle.

[0017] In the display panel of this application, the display panel includes a first anti-reflection layer, the first anti-reflection layer includes a plurality of first anti-reflection portions, the first anti-reflection portions are disposed on the surface of the fourth encapsulation portion opposite to the substrate, and the light transmittance of the first anti-reflection portions is less than the light transmittance of the fourth encapsulation portion.

[0018] In the display panel of this application, the display panel includes a third encapsulation layer disposed on the side of the fourth encapsulation portion away from the substrate, the third encapsulation layer covering the fourth encapsulation portion and the third encapsulation portion, and the material of the third encapsulation layer is the same as the material of the light-concentrating portion.

[0019] In the display panel of this application, the display panel includes a second antireflection layer disposed on the side of the first antireflection layer away from the substrate, the second antireflection layer covers the first antireflection layer, and the light transmittance of the second antireflection layer is greater than the light transmittance of the first antireflection layer.

[0020] This application also provides a display terminal, which includes the display panel described above.

[0021] Beneficial Effects: This application discloses a display panel and a display terminal. The display panel includes a substrate, multiple light-emitting units, and a first encapsulation layer; the multiple light-emitting units are disposed on one side of the substrate, and the light-emitting surface of each light-emitting unit includes a first surface and a first sidewall; the first encapsulation layer is disposed on the same side of the substrate as the light-emitting units, and the first encapsulation layer includes multiple first encapsulation portions and multiple second encapsulation portions. The first encapsulation portions cover the light-emitting surface, and the second encapsulation portions are contacted between two adjacent first encapsulation portions. The interface between the first encapsulation portions and the second encapsulation portions is a first interface, and the second encapsulation portions are spaced apart from the light-emitting units; wherein, the refractive index of the first encapsulation portion is greater than the refractive index of the second encapsulation portion, and at least a portion of the light emitted from the first sidewall undergoes total internal reflection at the first interface. By providing first and second encapsulation portions, this application enables at least a portion of the light emitted from the first sidewall to undergo total internal reflection at the first interface. The totally reflected light can then be emitted from the light-emitting side of the display panel, thereby increasing the utilization of the light emitted from the first sidewall and improving the light emission efficiency of the display panel. Attached Figure Description

[0022] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0023] Figure 1 A top view of a display panel provided for an embodiment of this application;

[0024] Figure 2A for Figure 1 A schematic diagram of the cross-sectional structure at point AA;

[0025] Figure 2B for Figure 2A Enlarged structural diagram at point C;

[0026] Figure 3 This is a simulation comparison diagram of light emission and effect of one embodiment of this application and a comparative example;

[0027] Figures 4A to 4J This is a process diagram of one embodiment of the present application;

[0028] Figure 5 This is a schematic diagram of the structure of a display terminal provided in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] Display panel 1, display area AA, non-display area NA, substrate 10, light-emitting unit 11, first surface 11a, first sidewall 11b, first encapsulation layer 20, first encapsulation part 21, second encapsulation part 22, first interface 20a, first encapsulation film layer 23, second encapsulation layer 30, third encapsulation part 31, fourth encapsulation part 32, trench 321, light-concentrating part 322, second interface 30a, second encapsulation film layer 33, first anti-reflection layer 40, first anti-reflection part 41, first anti-reflection film layer 42, third encapsulation layer 50, second anti-reflection layer 60, display terminal 2, terminal body 3. Detailed Implementation

[0031] 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 a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in its actual use or working state, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0032] This application provides a display panel 1, such as Figures 1 to 2B As shown, the display panel 1 includes a substrate 10, a plurality of light-emitting units 11, and a first encapsulation layer 20. The plurality of light-emitting units 11 are disposed on one side of the substrate 10, and the light-emitting surface of the light-emitting unit 11 includes a first surface 11a and a first sidewall 11b. The first encapsulation layer 20 is disposed on the same side of the substrate 10 as the light-emitting units 11. The first encapsulation layer 20 includes a plurality of first encapsulation portions 21 and a plurality of second encapsulation portions 22. The first encapsulation portions 21 cover the light-emitting surface, and the second encapsulation portions 22 are contacted between two adjacent first encapsulation portions 21. The interface between the first encapsulation portions 21 and the second encapsulation portions 22 is a first interface 20a. The second encapsulation portions 22 are spaced apart from the light-emitting units 11. The refractive index of the first encapsulation portion 21 is greater than that of the second encapsulation portion 22, and at least a portion of the light emitted from the first sidewall 11b undergoes total internal reflection at the first interface 20a.

[0033] In this embodiment, the display panel 1 can be an OLED panel, a Mini-LED panel, a Micro-LED panel, etc. The display panel 1 includes a display area AA and a non-display area NA disposed around the display area AA. The display area AA is provided with multiple light-emitting units 11. The light-emitting units 11 can include red light-emitting units, green light-emitting units, and blue light-emitting units, thereby achieving color display. The non-display area NA may be provided with a driving circuit (not shown in the figure), which is used to provide driving signals to the light-emitting units 11.

[0034] In this embodiment, the substrate 10 can be a rigid substrate or a flexible substrate. The materials for a rigid substrate include glass, quartz, or silicon wafers. The materials for a flexible substrate include one of colorless polyimide (PI), polycarbonate (PC), polynorbornene (PNB), and PET.

[0035] In this embodiment, the light-emitting unit 11 can be an OLED, Mini-LED, Micro-LED, etc. The light-emitting unit 11 is disposed on one side of the substrate 10. An array layer can be disposed on the substrate 10. The array layer includes thin-film transistors, etc. The array layer is electrically connected to the light-emitting unit 11 and is used to provide driving signals to the light-emitting unit 11.

[0036] The light-emitting surface of the light-emitting unit 11 includes a first surface 11a and a first sidewall 11b. The first surface 11a is the side surface of the light-emitting unit 11 facing away from the substrate 10, and the first sidewall 11b consists of multiple sidewalls connected to the first surface 11a. Both the first surface 11a and the first sidewall 11b of the light-emitting unit 11 can emit light.

[0037] In this embodiment, the first encapsulation part 21 covers the light-emitting surface, that is, the first encapsulation part 21 covers the first surface 11a and the first sidewall 11b. The material of the first encapsulation part 21 can be resin, silicone, etc. The first encapsulation part 21 protects the light-emitting unit 11 from the intrusion of water, oxygen, etc. into the light-emitting unit 11, which would cause the light-emitting unit 11 to fail.

[0038] In this embodiment, a second encapsulation part 22 may be provided between two adjacent first encapsulation parts 21. The sidewall of the second encapsulation part 22 is in contact with the sidewall of the first encapsulation part 21, and the sidewalls in contact with each other are the first interface 20a. The material of the second encapsulation part 22 may be resin, silicone, etc.

[0039] like Figure 2BAs shown, the refractive index of the first encapsulation portion 21 is greater than that of the second encapsulation portion 22. At least a portion of the light rays S1 emitted from the first sidewall 11b undergo total internal reflection at the first interface 20a. Alternatively, at least a portion of the light rays S1 emitted from the first sidewall 11b undergo total internal reflection at the first interface 20a after being reflected by the substrate 10. This increases the utilization of the light rays emitted from the first sidewall 11b and improves the light emission efficiency of the display panel 1.

[0040] Optionally, in this embodiment, the first interface 20a can be a plane, and the first interface 20a surrounds the periphery of the light-emitting unit 11, so that the light emitted from the multiple first sidewalls 11b can be totally reflected by the first interface 20a, thereby further improving the utilization rate of the light emitted from the first sidewalls 11b.

[0041] In the display panel 1 of this application, as Figure 1 and Figure 2B As shown, the refractive index of the first encapsulation part 21 is 1.6 to 1.7, the refractive index of the second encapsulation part 22 is 1.4 to 1.5, and the angle A between the first interface 20a and the bottom wall of the second encapsulation part 22 is 55 degrees to 70 degrees.

[0042] When light S1 from the light-emitting unit 11 is incident from the first encapsulation part 21 onto the first interface 20a, light rays with an incident angle greater than the critical angle will undergo total internal reflection at the first interface 20a. When the refractive index of the first encapsulation part 21 is 1.6 to 1.7 and the refractive index of the second encapsulation part 22 is 1.4 to 1.5, the range of the critical angle can be calculated to be 55 to 70 degrees according to the law of refraction. Setting the angle A between the first interface 20a and the bottom wall of the second encapsulation part 22 to 55 to 70 degrees allows more light rays S1 to undergo total internal reflection. When the refractive indices of the first and second encapsulation parts 21 are adjusted, the angle A between the first interface 20a and the bottom wall of the second encapsulation part 22 can be adjusted as needed, thereby giving the first interface 20a a better total internal reflection effect.

[0043] Optionally, a portion of the light S1 emitted from the first sidewall 11b is reflected by the bearing surface of the substrate 10. The reflected light then enters the first interface 20a, where total internal reflection occurs, further increasing the emitted light and thus improving the light emission efficiency of the display panel 1. Here, the bearing surface of the substrate 10 refers to the surface of the substrate 10 closest to the first encapsulation layer 20.

[0044] In this embodiment, the longitudinal section of the second packaging portion 22 can be a regular trapezoid. A regular trapezoid is defined as a trapezoid whose longer side is located on the side of its shorter side closer to the substrate 10. The longer side is the longer of the two sides excluding the legs of the trapezoid, and the shorter side is the shorter of the two sides excluding the legs. The angle A between the first interface 20a and the bottom wall of the second packaging portion 22 is the base angle of the trapezoid. By setting the longitudinal section of the second packaging portion 22 to a regular trapezoid, the regular shape of the trapezoid is easier to manufacture, reducing the manufacturing difficulty of the second packaging portion 22.

[0045] It should be noted that the longitudinal section refers to the section that passes through the normal to the bearing surface of the substrate 10 and is perpendicular to the first sidewall 11b.

[0046] In this embodiment, the thickness of the first encapsulation portion 21 can be the same as the thickness of the second encapsulation portion 22, thereby increasing the area of ​​the first interface 20a without increasing the thickness of the first encapsulation layer 20.

[0047] In the display panel 1 of this application, as Figures 1 to 2B As shown, the display panel 1 also includes a second encapsulation layer 30. The second encapsulation layer 30 is disposed on the side of the first encapsulation layer 20 away from the substrate 10. The second encapsulation layer 30 includes a plurality of third encapsulation portions 31 and a plurality of fourth encapsulation portions 32. The third encapsulation portions 31 are disposed corresponding to the first encapsulation portions 21, and the fourth encapsulation portions 32 are disposed corresponding to the second encapsulation portions 22. The interface between the third encapsulation portions 31 and the fourth encapsulation portions 32 is a second interface 30a. The angle B between the second interface 30a and the bottom wall of the fourth encapsulation portion 32 is an obtuse angle.

[0048] In this embodiment, the second encapsulation layer 30 is disposed on the first encapsulation layer 20. The third encapsulation portion 31 is disposed corresponding to the first encapsulation portion 21, and the orthographic projection of the third encapsulation portion 31 on the substrate 10 can overlap with the orthographic projection of the first encapsulation portion 21 on the substrate 10. The area of ​​the surface of the third encapsulation portion 31 on the side closer to the first encapsulation portion 21 can be equal to the area of ​​the surface of the first encapsulation portion 21 on the side closer to the third encapsulation portion 31.

[0049] In this embodiment, the fourth packaging portion 32 is provided corresponding to the second packaging portion 22, and the orthographic projection of the fourth packaging portion 32 on the substrate 10 can overlap with the orthographic projection of the second packaging portion 22 on the substrate 10. The area of ​​the surface of the fourth packaging portion 32 near the second packaging portion 22 can be equal to the area of ​​the surface of the second packaging portion 22 near the fourth packaging portion 32.

[0050] In this embodiment, the material of the third packaging part 31 and the material of the first packaging part 21 can be the same, so that the third packaging part 31 and the first packaging part 21 can be formed by the same process.

[0051] In this embodiment, the second interface 30a can be a plane. The angle B between the second interface 30a and the bottom wall of the fourth encapsulation part 32 is an obtuse angle. When the light ray S2 emitted from the first surface 11a is incident on the second interface 30a, it will be refracted at the second interface 30a, thereby causing the light ray to converge in the normal direction of the bearing surface of the substrate 10. That is to say, the wide-viewing-angle light ray S1 emitted from the first surface 11a can converge towards the center of the light-emitting unit 11, thereby improving the brightness of the display panel 1 at the forward viewing angle.

[0052] In the display panel 1 of this application, as Figures 1 to 2B As shown, the refractive index of the third encapsulation part 31 is 1.6 to 1.7, the refractive index of the fourth encapsulation part 32 is 1.4 to 1.5, and the angle B between the second interface 30a and the bottom wall of the fourth encapsulation part 32 is 110 degrees to 120 degrees.

[0053] In this embodiment, the materials of the third encapsulation part 31 and the fourth encapsulation part 32 can both be resin, silicone, etc.

[0054] In this embodiment, the longitudinal section of the fourth encapsulation part 32 can be an inverted trapezoid. An inverted trapezoid is one in which the shorter side of the trapezoid is located on the side of the longer side of the trapezoid closer to the substrate 10. The inverted trapezoid has a regular shape and is easier to manufacture.

[0055] In this embodiment, the angle between the second interface 30a and the bottom wall of the fourth encapsulation part 32 is 110 to 120 degrees. When the angle between the second interface 30a and the bottom wall of the fourth encapsulation part 32 exceeds 120 degrees, the second interface 30a tends to extend close to the light-emitting unit 11, causing some of the light rays at the positive viewing angle of the light-emitting unit 11 to be refracted, resulting in light loss.

[0056] In this embodiment, the orthographic projection of the fourth encapsulation portion 32 on the substrate 10 does not overlap with the orthographic projection of the light-emitting unit 11 on the substrate 10, thereby preventing the fourth encapsulation portion 32 from blocking the light from the orthographic viewing angle of the light-emitting unit 11.

[0057] In the display panel 1 of this application, as Figures 1 to 2B As shown, a groove 321 is provided on the side surface of the fourth packaging part 32 facing away from the substrate 10. A light-concentrating part 322 is filled in the groove 321. The refractive index of the light-concentrating part 322 is greater than that of the fourth packaging part 32.

[0058] In this embodiment, a groove 321 may be provided on the side surface of the fourth packaging portion 32 facing away from the substrate 10, that is, a groove 321 may be provided on the top wall of the fourth packaging portion 32. The groove 321 may be provided close to the edge of the top wall of the fourth packaging portion 32.

[0059] It should be understood that, such as Figure 1As shown, the groove 321 can surround the periphery of the light-emitting unit 11, so that the light from all directions of the light-emitting unit 11 can converge towards the center of the light-emitting unit 11. The groove 321 can also be arranged in segments, and the groove 321 can be arranged only along the row direction or column direction of the display panel 1. This application does not limit this.

[0060] In this embodiment, the depth of the trench 321 can be from 1 micrometer to 2 micrometers, and the depth of the trench 321 is less than the depth of the fourth packaging portion 32. A light-concentrating portion 322 is filled within the trench 321, and the surface of the light-concentrating portion 322 facing away from the substrate 10 can be flush with the surface of the fourth packaging portion 32 facing away from the substrate 10. That is to say, the thickness of the light-concentrating portion 322 can be from 1 micrometer to 2 micrometers, but is not limited to this. Here, depth and thickness both refer to the dimensions in the direction perpendicular to the bearing surface of the substrate 10.

[0061] In this embodiment, the refractive index of the light-concentrating part 322 is 1.6 to 1.7. The refractive index of the fourth encapsulation part 32 is 1.4 to 1.5. However, it is not limited to these.

[0062] In the display panel 1 of this application, as Figures 1 to 2B As shown, the longitudinal section of the light-concentrating part 322 includes an inverted triangle. The base of the triangle may coincide with the surface of the fourth packaging part 32 facing away from the substrate 10, and the waist of the triangle may extend toward the side of the substrate 10. The height of the triangle may be 1 micrometer to 2 micrometers.

[0063] In the display panel 1 of this application, as Figures 1 to 2B As shown, the display panel 1 includes a first antireflection layer 40, which includes a plurality of first antireflection portions 41. The first antireflection portions 41 are disposed on the surface of the fourth encapsulation portion 32 away from the substrate 10, and the light transmittance of the first antireflection portions 41 is less than that of the fourth encapsulation portion 32.

[0064] In this embodiment, the first antireflection section 41 is disposed corresponding to the fourth encapsulation section 32. The first antireflection section 41 is disposed between two adjacent light-concentrating sections 322, that is, the first antireflection section 41 can be disposed in the middle region of the top wall of the fourth encapsulation section 32, and the light-concentrating section 322 can be disposed in the edge region of the fourth encapsulation section 32. With the above arrangement, firstly, the first antireflection section 41 can avoid blocking the light emitted from the light-concentrating section 322; secondly, the first antireflection section 41 can block the metal lines of the encapsulation layer and the array layer on the substrate 10, thereby reducing the reflectivity of the display panel 1 to ambient light.

[0065] In this embodiment, the light transmittance of the first antireflective layer 41 is less than that of the fourth encapsulation layer 32. The first antireflective layer 41 can be a film layer with a light-shielding function. The first antireflective layer 41 may include carbon black, resin, solvent, and additives, etc. The light transmittance of the first antireflective layer 41 can be changed by adjusting the proportion of carbon black. The first antireflective layer 41 can absorb ambient light, thereby reducing the reflectivity of the display panel 1 to ambient light and improving the glare problem of the display panel 1.

[0066] In the display panel 1 of this application, as Figures 1 to 2B As shown, the display panel 1 includes a third encapsulation layer 50 disposed on the side of the fourth encapsulation portion 32 away from the substrate 10. The third encapsulation layer 50 covers the fourth encapsulation portion 32 and the third encapsulation portion 31. The material of the third encapsulation layer 50 is the same as the material of the light-concentrating portion 322.

[0067] In this embodiment, the display panel 1 includes a third encapsulation layer 50, which is a film layer that is disposed in one whole layer. The third encapsulation layer 50 covers the fourth encapsulation part 32, the first anti-reflection part 41, the third encapsulation part 31, and the light-concentrating part 322.

[0068] Optionally, in some embodiments, the material of the third encapsulation layer 50 is the same as the material of the light-concentrating portion 322. This means that the material of the third encapsulation layer 50 can be used to fill the trench 321, forming the light-concentrating portion 322 within the trench 321. This arrangement simplifies the manufacturing process of the light-concentrating portion 322 and reduces the manufacturing cost of the display panel 1.

[0069] In the display panel 1 of this application, as Figures 1 to 2B As shown, the display panel 1 includes a second antireflection layer 60 disposed on the side of the first antireflection layer 40 away from the substrate 10. The second antireflection layer 60 covers the first antireflection layer 40, and the light transmittance of the second antireflection layer 60 is greater than the light transmittance of the first antireflection portion 41.

[0070] In this embodiment, to further reduce the reflectivity of the display panel 1 to ambient light, a second antireflective layer 60 can be provided on the third encapsulation layer 50. The transmittance of the second antireflective layer 60 is less than that of the third encapsulation layer 50. The second antireflective layer 60 can be a single, continuous layer. To prevent the second antireflective layer 60 from excessively blocking the emitted light from the light-emitting unit 11, the transmittance of the second antireflective layer 60 can be greater than that of the first antireflective portion 41.

[0071] In this embodiment, the material of the second antireflective layer 60 may include carbon black, resin, solvent, and additives. The carbon black content in the second antireflective layer 60 may be less than the carbon black content in the first antireflective portion 41, thereby making the light transmittance of the second antireflective layer 60 greater than that of the first antireflective portion 41. Other methods may also be used to make the light transmittance of the second antireflective layer 60 greater than that of the first antireflective portion 41; this application does not impose any limitations on this.

[0072] The following is combined Figure 2B The principle of improving the light emission efficiency of the display panel according to the embodiments of this application will be explained.

[0073] When the light S1 from the light-emitting unit 11 is incident from the first encapsulation part 21 onto the first interface 20a, the light with an incident angle greater than the critical angle will undergo total internal reflection at the first interface 20a. In addition, part of the light S1 emitted from the first sidewall 11b is reflected by the bearing surface of the substrate 10, and the reflected light is incident onto the first interface 20a, where it undergoes total internal reflection, further increasing the emitted light and thereby improving the light emission efficiency of the display panel 1.

[0074] When the small-angle light ray S2 is incident on the second interface 30a, the refracted light ray is incident on the focusing part 322. After being further refracted in the focusing part 322, it is emitted from the direction of the light ray S3, and thus is further converged to the normal direction of the bearing surface of the substrate 10.

[0075] When the large-angle light ray S4 is incident on the second interface 30a, the refracted light ray is incident on the focusing part 322. After being further refracted in the focusing part 322, it is emitted from the direction of the light ray S5, thereby preventing the light ray S4 from being absorbed by the first anti-reflection part 41 and increasing the light output efficiency.

[0076] Meanwhile, the height of the light-concentrating part 322 is less than the bottom edge of the light-concentrating part 322, so that the apex angle of the light-concentrating part 322 is an obtuse angle, so that light S4 plays a dominant role in light S4 and light S2, thereby improving the overall light effect.

[0077] Figure 3 This is a simulation comparison diagram of light emission effect between one embodiment and a comparative example of this application. The difference between the comparative example and the embodiment of this application is that the light-emitting unit 11 in the comparative example has an encapsulation layer disposed on its entire surface. The embodiment of this application is... Figure 2A Examples are shown in the text. Figure 3 In the diagram, the horizontal axis represents the viewing angle, and the vertical axis represents the normalized light intensity. Curve L1 is a comparative example, and curve L2 is an embodiment of this application. Figure 3It can be seen that the light intensity of curve L2 at the positive viewing angle (horizontal axis is 0) is about 1.5, while the light intensity of curve L1 at the positive viewing angle is about 1.0. The embodiment of this application improves the light emission efficiency by about 50% compared to the comparative example. The display panel 1 of this application totally reflects at least part of the light emitted from the first sidewall 11b back to the light emission direction of the display panel 1, thus significantly reducing light loss. At the same time, the light is converged by the second interface 30a and the light-concentrating part 322, thereby improving the brightness of the display panel 1 at the positive viewing angle.

[0078] Figures 4A to 4J This is a schematic diagram of a process according to one embodiment of this application. The following is in conjunction with… Figures 4A to 4J The process flow of the embodiments of this application will be described.

[0079] like Figure 4A As shown, a substrate 10 is provided, a light-emitting unit 11 is disposed on the substrate 10, and a first encapsulation film layer 23 is formed on the light-emitting unit 11.

[0080] In this embodiment, the light-emitting unit 11 can be a Micro-LED. The Micro-LED can be transferred and bonded to the substrate 10.

[0081] In this embodiment, the first encapsulation film layer 23 can be formed by a coating process.

[0082] like Figure 4B As shown, the first encapsulation film layer 23 is patterned to form the second encapsulation part 22.

[0083] In this embodiment, the patterning process may include photoresist coating, exposure and development, etc.

[0084] like Figure 4C As shown, a second encapsulation film layer 33 is formed on the light-emitting unit 11 and the second encapsulation part 22.

[0085] In this embodiment, the second encapsulation film layer 33 can be formed by a coating process.

[0086] like Figure 4D As shown, the second encapsulation film layer 33 is patterned to form the first encapsulation part 21 and the third encapsulation part 31.

[0087] In this embodiment, by patterning the second encapsulation film layer 33, the first encapsulation portion 21 and the third encapsulation portion 31 can be formed simultaneously, and the first encapsulation portion 21 and the third encapsulation portion 31 are made of the same material. This arrangement simplifies the manufacturing process of the display panel 1.

[0088] like Figure 4E As shown, a fourth packaging part 32 is formed on the first packaging part 21, the second packaging part 22, and the third packaging part 31.

[0089] In this embodiment, the fourth encapsulation portion 32 fills the space between two adjacent third encapsulation portions 31. The fourth encapsulation portion 32 can be formed by inkjet printing, thereby simplifying the manufacturing process of the fourth encapsulation portion 32. The third encapsulation portions 31 and the fourth encapsulation portion 32 constitute the second encapsulation layer 30.

[0090] like Figure 4F As shown, a first antireflective film layer 42 is formed on the second encapsulation layer 30.

[0091] In this embodiment, the first antireflective film layer 42 can be formed by a coating process or the like.

[0092] like Figure 4G As shown, the first antireflective film layer 42 is patterned to form the first antireflective part 41.

[0093] In this embodiment, the orthographic projection of the first antireflection part 41 on the substrate does not overlap with the orthographic projection of the light-emitting unit 11 on the substrate, thereby preventing the first antireflection part 41 from blocking the emitted light from the light-emitting unit 11.

[0094] like Figure 4H As shown, a groove 321 is formed on the fourth encapsulation part 32.

[0095] In this embodiment, the trench 321 can be formed by patterning and etching.

[0096] like Figure 4I As shown, a third encapsulation layer 50 is formed on the first anti-reflection section 41, and the third encapsulation layer 50 fills the trench 321 to form a light-concentrating section 322.

[0097] In this embodiment, the third encapsulation layer 50 can be formed by a coating process or the like. The material of the light-concentrating part 322 is the same as the material of the third encapsulation layer 50, thereby simplifying the manufacturing process of the display panel 1.

[0098] like Figure 4J As shown, a second anti-reflection layer 60 is formed on the third encapsulation layer 50.

[0099] In this embodiment, the second antireflective layer 60 is a single, continuous layer, and can be formed using a coating process. The second antireflective layer 60 can further reduce the reflection of ambient light.

[0100] like Figure 5 As shown, this application also provides a display terminal 2, which includes the display panel 1 described above.

[0101] In this embodiment, as Figure 5 As shown, the display terminal 2 includes a display panel 1 and a terminal body 3, which are combined into one unit.

[0102] In this embodiment, the display terminal 2 can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0103] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0104] The display panel and display terminal provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display panel, characterized in that, include: substrate; Multiple light-emitting units are disposed on one side of the substrate, and the light-emitting surface of the light-emitting unit includes a first surface and a first sidewall; A first encapsulation layer is disposed on the same side of the substrate as the light-emitting unit. The first encapsulation layer includes a plurality of first encapsulation portions and a plurality of second encapsulation portions. The first encapsulation portions cover the light-emitting surface. The second encapsulation portions are contacted and disposed between two adjacent first encapsulation portions. The interface between the first encapsulation portions and the second encapsulation portions is a first interface. The second encapsulation portions are spaced apart from the light-emitting unit. The refractive index of the first encapsulation part is greater than that of the second encapsulation part, and at least a portion of the light rays emitted from the first sidewall undergo total internal reflection at the first interface.

2. The display panel according to claim 1, characterized in that, The display panel further includes a second encapsulation layer, which is disposed on the side of the first encapsulation layer away from the substrate. The second encapsulation layer includes a plurality of third encapsulation portions and a plurality of fourth encapsulation portions. The third encapsulation portions are disposed corresponding to the first encapsulation portions, and the fourth encapsulation portions are disposed corresponding to the second encapsulation portions. The interface between the third encapsulation portions and the fourth encapsulation portions is a second interface, and the angle between the second interface and the bottom wall of the fourth encapsulation portion is an obtuse angle.

3. The display panel according to claim 2, characterized in that, The fourth encapsulation part has a groove on the side surface opposite to the substrate, and a light-concentrating part is filled in the groove. The refractive index of the light-concentrating part is greater than that of the fourth encapsulation part.

4. The display panel according to claim 3, characterized in that, The longitudinal section of the focusing part includes an inverted triangle.

5. The display panel according to claim 3, characterized in that, The display panel includes a third encapsulation layer disposed on the side of the fourth encapsulation portion away from the substrate. The third encapsulation layer covers the fourth encapsulation portion and the third encapsulation portion. The material of the third encapsulation layer is the same as the material of the light-concentrating portion.

6. The display panel according to claim 2, characterized in that, The display panel includes a first anti-reflection layer, which includes a plurality of first anti-reflection portions. The first anti-reflection portions are disposed on the surface of the fourth encapsulation portion away from the substrate, and the light transmittance of the first anti-reflection portions is less than that of the fourth encapsulation portion.

7. The display panel according to claim 6, characterized in that, The display panel includes a second antireflection layer disposed on the side of the first antireflection layer away from the substrate, the second antireflection layer covering the first antireflection layer, and the light transmittance of the second antireflection layer being greater than the light transmittance of the first antireflection layer.

8. The display panel according to claim 2, characterized in that, The refractive index of the third encapsulation part is 1.6 to 1.7, the refractive index of the fourth encapsulation part is 1.4 to 1.5, and the angle between the second interface and the bottom wall of the fourth encapsulation part is 110 degrees to 120 degrees.

9. The display panel according to claim 1, characterized in that, The refractive index of the first encapsulation part is 1.6 to 1.7, the refractive index of the second encapsulation part is 1.4 to 1.5, and the angle between the first interface and the bottom wall of the second encapsulation part is 55 degrees to 70 degrees.

10. A display terminal, characterized in that, The display terminal includes a display panel as described in any one of claims 1 to 9.

Images