Display panel, manufacturing method thereof and display device

Abstract

A display panel (100) comprises a plurality of sub-pixel areas (P0), and each sub-pixel area (P0) comprises an opening area (K). The display panel further comprises an optical device layer (10), a bonding layer (20) and a light adjusting layer (30). The optical device layer (10) comprises a buffer layer (11) and a plurality of light-emitting units (12), each light-emitting unit (12) is located in the opening area (K) in the corresponding sub-pixel area (P0), and the buffer layer (11) is located on the light-emitting faces (C) of the light-emitting units (12). The bonding layer (20) is located on the side, away from the light-emitting unit (12), of the buffer layer (11). The refractive index of the adhesive layer (20) is smaller than the refractive index of the buffer layer (11). The light adjusting layer (30) is located on the side, close to the bonding layer (20), of the buffer layer (11), and the light adjusting layer (30) is configured in the mode that when light emitted by the multiple light-emitting units (12) irradiates the buffer layer (11), at least part of light with the refraction angle larger than or equal to (I) irradiates the bonding layer (11) through the light adjusting layer (30). Wherein n1 is the refractive index of the buffer layer (11), and n2 is the refractive index of the adhesive layer (20).

Description

Display panel and manufacturing method thereof, and display device Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0002] With the development of technology and the demand for display, Mini Light-Emitting Diode (Mini LED) is the development trend of future display devices. It has incomparable advantages over LCD and organic electroluminescent display panels, such as ultra-high contrast, ultra-high color gamut, high luminous efficiency, high brightness, and low energy consumption.

[0003] Summary of the Invention

[0004] On the one hand, a display panel is provided. The display panel includes a plurality of sub-pixel areas, and the sub-pixel area includes an opening area. The display panel also includes: an optical device layer, an adhesive layer and a light adjustment layer. The optical device layer includes a buffer layer and a plurality of light-emitting units, one light-emitting unit is located in the opening area in a sub-pixel area, and the buffer layer is located on the light-emitting surface of the plurality of light-emitting units. The adhesive layer is located on the side of the buffer layer away from the light-emitting unit; the refractive index of the adhesive layer is less than the refractive index of the buffer layer. The light adjustment layer is located on the side of the buffer layer close to the adhesive layer, and the light adjustment layer is configured so that when the light emitted by the plurality of light-emitting units is irradiated into the buffer layer, at least part of the refraction angle is greater than or equal to The light is incident on the adhesive layer through the light adjustment layer. Wherein, n1 is the refractive index of the buffer layer, and n2 is the refractive index of the adhesive layer.

[0005] In some embodiments, the light adjustment layer includes a plurality of light adjustment portions, and the light adjustment portions at least partially overlap with the opening area.

[0006] In some embodiments, the light adjustment portion is located in the opening area.

[0007] In some embodiments, the light conditioning layer includes a rough layer.

[0008] In some embodiments, the rough layer includes a plurality of scattering particles.

[0009] In some embodiments, the buffer layer includes a first surface close to the adhesive layer, wherein the first surface includes a plurality of rough areas, and the plurality of rough areas are reused as the rough layer.

[0010] In some embodiments, the roughness of the rough layer ranges from about 10 nm to about 100 nm.

[0011] In some embodiments, the light adjustment layer includes a light focusing layer.

[0012] In some embodiments, the light adjustment layer includes a rough layer and a light-collecting layer, wherein the light-collecting layer is located on a side of the rough layer away from the buffer layer.

[0013] In some embodiments, the refractive index of the light-concentrating layer is greater than the refractive index of the adhesive layer, and the refractive index of the light-concentrating layer is less than the refractive index of the buffer layer.

[0014] In some embodiments, the light-collecting layer includes at least one raised portion, the cross section of the raised portion is triangular, and the base angle α of the raised portion satisfies: Wherein, n3 is the refractive index of the light-collecting layer.

[0015] In some embodiments, the refractive index of the light-collecting layer is greater than the refractive index of the buffer layer. The light-collecting layer includes at least one protrusion, the cross section of the protrusion is triangular, and the base angle α of the protrusion satisfies: Wherein, n3 is the refractive index of the light-collecting layer.

[0016] In some embodiments, the display panel further includes a light shielding portion, and the light shielding portion isolates the plurality of light adjustment portions.

[0017] In some embodiments, the display panel further comprises an optical conversion layer. The optical conversion layer is located on a side of the adhesive layer away from the light adjustment layer. The optical conversion layer comprises a blocking portion and a plurality of color conversion portions, wherein the blocking portion separates the plurality of color conversion portions, and the orthographic projections of the color conversion portions on the adhesive layer at least partially overlap with the orthographic projections of the light-emitting units on the adhesive layer.

[0018] In some embodiments, the color conversion unit includes a first color conversion unit configured to convert the light emitted by the light emitting unit into a target color and a second color conversion unit configured to directly transmit the light emitted by the light emitting unit.

[0019] In some embodiments, the display panel further comprises a color filter layer, the color filter layer being located on a side of the optical conversion layer away from the adhesive layer. The color filter layer comprises a plurality of filter units and a black matrix; the black matrix separates the plurality of filter units. The orthographic projections of the filter units on the adhesive layer at least partially overlap with the orthographic projections of the light-emitting units on the adhesive layer.

[0020] In some embodiments, the orthographic projection of the color conversion portion on the adhesive layer covers the orthographic projection of the filter unit on the adhesive layer.

[0021] On the other hand, a method for manufacturing a display panel is provided. The display panel includes a plurality of sub-pixel areas, and the sub-pixel areas include opening areas. The manufacturing method includes: providing a sapphire substrate, and forming a buffer layer on the sapphire substrate. A plurality of light-emitting units are formed on the side of the buffer layer away from the sapphire substrate to form an optical device layer. Wherein, one light-emitting unit is located in one of the sub-pixel areas. A transfer substrate is provided, and the light-emitting unit in the optical device layer is bonded to the transfer substrate, and the sapphire substrate is removed. A light-adjusting layer is formed on the side of the buffer layer away from the light-emitting unit. An adhesive layer is provided, and the adhesive layer is bonded to the side of the light-adjusting layer away from the buffer layer. Wherein, the light-adjusting layer is configured so that when the light emitted by the plurality of light-emitting units is irradiated into the buffer layer, at least part of the refraction angle is greater than or equal to The light passes through the light adjustment layer and enters the bonding layer; wherein n1 is the refractive index of the buffer layer, and n2 is the refractive index of the bonding layer.

[0022] In some embodiments, forming a light adjustment layer on a side of the buffer layer away from the light emitting unit includes: forming a rough layer having a plurality of scattering particles on a side of the buffer layer away from the light emitting unit to form the light adjustment layer.

[0023] In some embodiments, a light adjustment layer is formed on a side of the buffer layer away from the light-emitting unit, including: roughening a first surface of the buffer layer away from the multiple light-emitting units, forming multiple rough areas on the first surface to be reused as a rough layer, and using the rough layer to form the light adjustment layer.

[0024] In some embodiments, forming a light adjustment layer on a side of the buffer layer away from the light emitting unit includes forming a light focusing layer on a side of the buffer layer away from the light emitting unit to form the light adjustment layer.

[0025] In some embodiments, forming the light adjustment layer on a side of the buffer layer away from the light emitting unit includes forming a rough layer on a side of the buffer layer away from the light emitting unit and forming a light focusing layer on a side of the rough layer away from the plurality of light emitting units to form the light adjustment layer.

[0026] In another aspect, a display device is provided, comprising: a display panel according to any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0028] FIG1 is a structural diagram of a display device according to some embodiments;

[0029] FIG2 is a structural diagram of a display panel according to some possible implementation methods;

[0030] FIG3 is a structural diagram of a pixel region in FIG2 ;

[0031] FIG4 is a cross-sectional view of a display panel according to some embodiments;

[0032] FIG5 is a graph showing how the brightness of a second sub-pixel region P2 varies with distance in a direction A1 according to some embodiments;

[0033] FIG6 is a graph showing how the brightness of a second sub-pixel region P2 varies with distance in a direction A2 according to some embodiments;

[0034] FIG7 is a graph showing how the brightness of a first sub-pixel region P1 varies with distance in a direction A1 according to some embodiments;

[0035] FIG8 is a graph showing how the brightness of a first sub-pixel region P1 varies with distance in a direction A2 according to some embodiments;

[0036] FIG9 is a cross-sectional view of a display panel according to some other embodiments;

[0037] FIG10 is a cross-sectional view of a display panel according to yet other embodiments;

[0038] FIG11 is a cross-sectional view of a display panel according to yet other embodiments;

[0039] FIG12 is a cross-sectional view of a display panel according to yet other embodiments;

[0040] FIG13 is a cross-sectional view of a display panel according to yet other embodiments;

[0041] FIG14 is a cross-sectional view of a display panel according to yet other embodiments;

[0042] FIG15 is a cross-sectional view of a display panel according to yet other embodiments;

[0043] FIG16 is a light path diagram within Q in FIG15 ;

[0044] FIG17 is another optical path diagram within Q in FIG15 ;

[0045] FIG18 is another optical path diagram within Q in FIG15 ;

[0046] FIG19 is another optical path diagram within Q in FIG15 ;

[0047] FIG20 is a cross-sectional view of a display panel according to yet other embodiments;

[0048] FIG21 is a cross-sectional view of a display panel according to yet other embodiments;

[0049] FIG22 is a cross-sectional view of a display panel according to yet other embodiments;

[0050] FIG23 is a cross-sectional view of a display panel according to yet other embodiments;

[0051] FIG24 is a cross-sectional view of a display panel according to yet other embodiments;

[0052] FIG25 is a flow chart of a method for manufacturing a display panel according to some embodiments;

[0053] FIG26 is a structural diagram corresponding to some steps in FIG25;

[0054] FIG27 is a structural diagram corresponding to other steps in FIG25;

[0055] FIG28 is another structural diagram corresponding to step S4 in FIG25 ;

[0056] FIG29 is another structural diagram corresponding to step S4 in FIG25 ;

[0057] FIG30 is another structural diagram corresponding to step S4 in FIG25 ;

[0058] FIG31 is another structural diagram corresponding to step S4 in FIG25 ;

[0059] FIG32 is a structural diagram of some steps in a method for manufacturing a display panel according to some embodiments. DETAILED DESCRIPTION

[0060] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0061] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0062] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature designated "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0063] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0064] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0065] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0066] As used herein, the term "if" is optionally interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined that" or "if [stated condition or event] is detected" are optionally interpreted to mean "upon determining" or "in response to determining" or "upon detecting [stated condition or event]" or "in response to detecting [stated condition or event]," depending on the context.

[0067] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0068] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0069] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0070] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 5% of either one.

[0071] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0072] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0073] FIG1 is a structural diagram of a display device according to some embodiments. Referring to FIG1 , some embodiments of the present disclosure provide a display device 200 . The display device 200 includes a display panel 100 .

[0074] Exemplarily, the display device 200 further includes a frame, a display driver IC (Integrated Circuit), and other electronic components.

[0075] For example, the display device 200 may be an electroluminescent display device, which may be a quantum dot light emitting diode (QLED) display device.

[0076] Exemplarily, the display device 200 can be any display device that displays images, whether in motion (e.g., video) or fixed (e.g., still images), and whether text or images. More specifically, it is expected that the display device of the embodiments described can be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat-panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigation systems, cockpit controls and / or displays, camera view displays (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.

[0077] The following is an introduction using a display device using Mini-LED + Quantum-Dot (QD) as an example:

[0078] FIG. 2 is a structural diagram of a display panel according to some possible implementation modes, and FIG. 3 is a structural diagram of a pixel region in FIG. 2 .

[0079] In some embodiments, referring to FIG. 2 and FIG. 3 , the display panel 100 includes a plurality of pixel regions P, and one pixel region P includes a plurality of sub-pixel regions P0.

[0080] In some examples, the plurality of sub-pixel regions P0 may include sub-pixel regions P0 with different luminous colors.

[0081] For example, the plurality of sub-pixel regions P0 may be divided into a first sub-pixel region P1, a second sub-pixel region P2, and a third sub-pixel region P3. The first sub-pixel region P1, the second sub-pixel region P2, and the third sub-pixel region P3 each emit three primary colors of light. For example, the first sub-pixel region P1 may emit red light, the second sub-pixel region P2 may emit green light, and the third sub-pixel region P3 may emit blue light.

[0082] In some examples, one pixel region P may include a plurality of sub-pixel regions P0 emitting light of different colors.

[0083] For example, one pixel region P may include three sub-pixel regions P0 that emit light of different colors. For example, one pixel region P may include a first sub-pixel region P1, a second sub-pixel region P2, and a third sub-pixel region P3.

[0084] FIG. 4 is a cross-sectional view of a display panel according to some embodiments.

[0085] 4 , the sub-pixel region P0 in the display panel 100 includes an opening region K. Light within the display panel 100 can be emitted from the display panel 100 through the opening region K, so that each sub-pixel region P0 can emit light to realize image display on the display panel 100 .

[0086] The display panel 100 further includes an optical device layer 10 and an adhesive layer 20 .

[0087] The optical device layer 10 includes a plurality of light-emitting units 12. Each light-emitting unit 12 can be provided corresponding to each sub-pixel region P0. For example, each light-emitting unit 12 can be provided within an opening region K of each sub-pixel region P0, so that light emitted by the light-emitting unit 12 can be emitted from the display panel 100 through the opening region K, thereby enabling the display panel 100 to display an image.

[0088] In some examples, the light-emitting unit 12 may be a blue light-emitting diode chip, which may be a micro light-emitting diode (Micro LED) or a mini light-emitting diode (Mini LED).

[0089] The following description takes the light-emitting unit 12 as a Mini LED as an example:

[0090] When forming the optical device layer 10 in the display panel 100 , a plurality of light emitting units 12 may generally be formed on a substrate, for example, the light emitting units 12 may be formed on a sapphire substrate.

[0091] For example, one semiconductor layer in the plurality of light-emitting units 12 may be grown on a substrate, and then other film layers in the light-emitting unit 12 may be formed on the semiconductor layer.

[0092] However, since one of the semiconductor layers in the light-emitting unit 12 is grown on the substrate as a heterojunction, the lattice mismatch between the semiconductor layer in the light-emitting unit 12 and the sapphire substrate is large, and it is difficult to directly prepare high-quality semiconductor layer on the sapphire substrate, that is, it is difficult to directly prepare high-quality light-emitting unit 12 on the sapphire substrate.

[0093] Furthermore, the optical device layer 10 may further include a buffer layer 11. The buffer layer 11 is disposed between the semiconductor layer and the sapphire substrate in the light emitting unit 12 to reduce defects caused by heterojunction growth, thereby improving the quality of the light emitting unit 12.

[0094] In some examples, the material of the buffer layer 11 may include gallium nitride (GaN). In this case, the refractive index of the buffer layer 11 is approximately 2.4. However, some embodiments of the present disclosure are not limited thereto.

[0095] After the light-emitting units 12 are fabricated on the substrate, the substrate can be removed. Subsequently, an adhesive layer 20 can be provided on the side of the buffer layer 11 in the optical device layer 10 that is away from the light-emitting units 12. This allows the adhesive layer 20 to be used to secure the optical device layer 10 to other functional layers within the display panel 100. For example, the other functional layers within the display panel 100 may be optical conversion layers, which will be described in detail later.

[0096] In some examples, the adhesive layer 20 may be a bonding adhesive layer. For example, the adhesive layer 20 may be benzocyclobutene (BCB). In this case, the refractive index of the adhesive layer 20 is approximately 1.56. However, some embodiments of the present disclosure are not limited thereto.

[0097] In some examples, the buffer layer 11 can be arranged closer to the adhesive layer 20 relative to the plurality of light-emitting units 12 to prevent the light-emitting units 12 from directly contacting the adhesive layer 20 and affecting the electrical connection between the electrodes in the light-emitting units 12 and the connecting electrodes in the display panel 100 .

[0098] Based on this, the light-emitting unit 12 can be configured as a flip-chip Mini LED. Furthermore, the buffer layer 11 is equivalent to being provided on the light-emitting surface C of the plurality of light-emitting units 12 .

[0099] However, generally, after forming the optical device layer 10, the optical device layer 10 needs to be laser cut to form a plurality of independent optical devices E. Subsequently, the cut independent optical devices E are transported to the display panel 100. However, the buffer layer 11 may be cut during the cutting process of the optical device layer 10, resulting in a rough surface on the side surface 113 of the buffer layer 11.

[0100] In some examples, when laser cutting the optical device layer 10, one light-emitting unit 12 and its corresponding buffer layer 11 can be cut so that one light-emitting unit 12 and its corresponding buffer layer 11 constitute one light-emitting device E. In this case, one light-emitting unit 12 is located in one sub-pixel region P0, that is, one optical device E is located in one sub-pixel region P0. Three optical devices E can be located in one pixel region P, and one light-emitting device E can be located in one sub-pixel region P0 of one color.

[0101] In other examples, when the optical device layer 10 is laser cut, three light-emitting units 12 and their corresponding buffer layers 11 may be cut so that the three light-emitting units 12 and their corresponding buffer layers 11 can constitute a light-emitting device E. In this case, one light-emitting unit 12 is located in one sub-pixel region P0, so that one light-emitting device E can be located in one pixel region P.

[0102] For example, the three light-emitting units 12 in an optical device E may be a first light-emitting unit 12A, a second light-emitting unit 12B, and a third light-emitting unit 12C. The three light-emitting units 12 may be located in a first sub-pixel region P1, a second sub-pixel region P2, and a third sub-pixel region P3, respectively. For example, the first light-emitting unit 12A is located in the first sub-pixel region P1, the second light-emitting unit 12B is located in the second sub-pixel region P2, and the third light-emitting unit 12C is located in the third sub-pixel region P3.

[0103] Furthermore, during the production of the display panel 100, the optical devices E must be transferred. By dividing the three light-emitting units 12 into one optical device E, the number of optical devices E can be reduced while the size of the optical devices E can be relatively increased, given a given number of light-emitting units 12. This effectively reduces the number of optical devices E required during the transfer process, thereby effectively reducing the number of transfers, lowering process complexity, and improving product yield.

[0104] 4 illustrates an example in which three light-emitting units 12 and their corresponding buffer layers 11 constitute a light-emitting device E.

[0105] Figure 5 is a graph showing how the brightness of a second sub-pixel region P2 varies with distance in direction A1, according to some embodiments. Figure 6 is a graph showing how the brightness of a second sub-pixel region P2 varies with distance in direction A2, according to some embodiments. Figure 7 is a graph showing how the brightness of a first sub-pixel region P1 varies with distance in direction A1, according to some embodiments. Figure 8 is a graph showing how the brightness of a first sub-pixel region P1 varies with distance in direction A2, according to some embodiments. The origin of the coordinate systems in Figures 5 to 8 may be the center of the sub-pixel region.

[0106] However, the inventors of the present disclosure have discovered through research, as shown in Figures 4 to 8, that in general, the refractive index of the adhesive layer 20 is lower than that of the buffer layer 11, and the buffer layer 11 is located between the light-emitting unit 12 and the adhesive layer 20. Based on this, the light emitted by the light-emitting unit 12 will enter the adhesive layer 20 through the buffer layer 11. However, since the refractive index of the buffer layer 11 is higher than that of the adhesive layer 20, when the light in the buffer layer 11 enters the adhesive layer 20, it is the light entering the medium with a higher refractive index from the medium with a lower refractive index, which will cause the light to be easily totally reflected at the interface between the buffer layer 11 and the adhesive layer 20 and unable to enter the adhesive layer. In other words, the buffer layer 11 will prevent the light emitted by the light-emitting unit 12 from continuing to be emitted from the opening area K in each sub-pixel area P0 of the display panel 100, affecting the brightness of each sub-pixel area P0 of the display panel 100, and further reducing the quality of the display image of the display panel 100.

[0107] In addition, since the buffer layer 11 is cut during the cutting process of the optical device layer 10, the surface of the side surface 113 of the buffer layer 11 will become rough. As a result, the light that is fully emitted from the buffer layer 11 will continue to be fully emitted until it enters the side surface 113 of the buffer layer 11 and exits the buffer layer 11. Since this part of the light is not only emitted without passing through the opening area K, but also emitted through the side surface 113 of the buffer layer 11, it will cause this part of the light to be emitted at the edge V of the optical device E (as shown in Figure 3). This problem will not only affect the brightness of the light-emitting unit 12 in the optical device E, but also cause light leakage at the edge V of the optical device E, affecting the quality of the display image of the display panel 100.

[0108] FIG9 is a cross-sectional view of a display panel according to some other embodiments, wherein FIG9 only takes three sub-pixel regions P0 in the optical device layer 10 as an example.

[0109] As shown in FIG9 , the display panel 100 provided in some embodiments of the present disclosure may further include a light adjustment layer 30. The light adjustment layer 30 is located on the side of the buffer layer 11 close to the adhesive layer 20. The light adjustment layer 30 is configured such that when the light emitted by the plurality of light emitting units 12 irradiates the buffer layer 11, at least part of the refraction angle γ is greater than or equal to The light is incident on the adhesive layer 20 through the light adjustment layer 30. Wherein, n1 is the refractive index of the buffer layer 11, and n2 is the refractive index of the adhesive layer 20.

[0110] It can be understood that, returning to Figure 4, when the light adjustment layer is not provided, the refraction angle of the light irradiated by the light emitting unit 12 into the buffer layer 11 is γ. The light will continue to move away from the light emitting unit 12 and irradiate the adhesive layer 20 (the interface between the buffer layer 11 and the adhesive layer 20). At this time, the incident angle of the light irradiating the adhesive layer 20 is ζ. Under normal circumstances, the upper surface 111 and the lower surface 112 of the buffer layer 11 are parallel to each other. Based on this, the refraction angle γ is approximately equal to the incident angle ζ.

[0111] Moreover, when the light is irradiated to the interface between the buffer layer 11 and the adhesive layer 20, the incident angle ζ is greater than the critical angle All light rays will be totally reflected. The incident angle ζ of this part is greater than The light will continue to be reflected in the buffer layer 11 and cannot enter the adhesive layer 20, resulting in the light no longer being able to continue to emit upward from the display panel 100. Based on the above description, it can be seen that the refraction angle γ of the light emitting unit 12 irradiating the buffer layer 11 is greater than or equal to All light will be totally reflected within the buffer layer 11 and cannot enter the adhesive layer 20.

[0112] After the light adjustment layer 30 is added to the display panel 100, the light adjustment layer 30 can be used to make at least part of the refraction angle γ greater than or equal to That is, at least part of the light that would have been totally reflected in the buffer layer 11 can be incident on the adhesive layer 20 through the light adjustment layer 30, which can improve the light leakage problem of the display panel 100 to a certain extent and improve the display image quality of the display panel 100.

[0113] In addition, when the light emitted by the plurality of light emitting units 12 irradiates the buffer layer 11, the refraction angle γ is less than or equal to The light can be incident at an angle ζ less than the critical angle when the light is incident on the light adjustment layer 30. Therefore, this part of the light will not be totally reflected at the interface between the buffer layer 11 and the light adjustment layer 30 , and thus this part of the light can also enter the adhesive layer 20 .

[0114] Based on this, when the light emitted by the plurality of light emitting units 12 irradiates the buffer layer 11, the refraction angle γ is less than or equal to and, at least part of the refracted light has an angle greater than or equal to All the light can continue to enter the adhesive layer 20 and then continue to be emitted from the display panel 100 along the opening area K, so as to realize the image display of the display panel 100.

[0115] In summary, the display panel 100 provided in some embodiments of the present disclosure may be provided with a light adjustment layer 30 on the side of the buffer layer 11 close to the adhesive layer 20. The light adjustment layer 30 not only does not affect the light that would not have been totally reflected in the buffer layer 11, allowing it to continue to enter the adhesive layer 20, but also allows at least part of the light that would have been totally reflected in the buffer layer 11 to enter the adhesive layer 20, that is, it can reduce the light that is totally reflected in the buffer layer 11 and emitted from the side 113 of the buffer layer 11. This can further help improve the brightness of each sub-pixel region P0 in the display panel 100, and can also prevent the problem of light leakage in each pixel region P (light-emitting device E) in the display panel 100, thereby improving the display image quality of the display panel 100.

[0116] It should be noted that, for different structures of the light adjustment layer 30, different numbers of refraction angles γ can be made greater than or equal to The light is incident on the adhesive layer 20. When introducing the light adjustment layer 30 with different structures below, the principle of solving the problem and the method of making the refraction angle γ greater than or equal to The amount of light entering the adhesive layer 20.

[0117] Figure 10 is a cross-sectional view of a display panel according to some further embodiments. Figure 11 is a cross-sectional view of a display panel according to some further embodiments. Figure 12 is a cross-sectional view of a display panel according to some further embodiments.

[0118] The light adjustment layer 30 includes a plurality of light adjustment portions 30A. The light adjustment portions 30A at least partially overlap with the opening area K.

[0119] Since one light emitting unit 12 is located in the opening area K in one sub-pixel area P0, the light emitted by the light emitting unit 12 is emitted along the opening area K, so that the sub-pixel area P0 emits light. Based on this, the light adjustment layer 30 is patterned into a plurality of light adjustment parts 30A, and the light adjustment parts 30A are arranged to at least partially overlap with the opening area K, so that the light adjustment parts 30A overlapping with the opening area K can make at least part of the refraction angle γ of the light emitted by the light emitting unit 12 greater than or equal to The light emitted by the light emitting unit 12 is incident on the adhesive layer 20. This improves the problem of total reflection of the light emitted by the light emitting unit 12 at the interface between the buffer layer 11 and the rough portion, and further enables the light emitted by the light emitting unit 12 to be emitted from the display panel 100 along the opening area K, thereby ensuring the display quality of the display panel 100.

[0120] The light adjustment portion 30A at least partially overlaps with the opening area K, including the following situations:

[0121] The first type: Please continue to refer to FIG10 , the size of the light adjustment portion 30A is larger than the opening area K, and the light adjustment portion 30A covers the opening area K. In this case, the light adjustment portion 30A can better cover the buffer layer 11 overlapping with the opening area K, so that the light adjustment portion 30A can be used to make the light emitting unit 12 emit at least part of the refraction angle γ greater than or equal to The light is incident on the adhesive layer 20, so as to improve the problem of total reflection of the light emitted by the light emitting unit 12 at the interface between the buffer layer 11 and the light adjustment part 30A in the opening area K, and improve the light leakage problem of each pixel area P (light emitting device E) in the display panel 100, which is beneficial to improve the brightness of each sub-pixel area P0 in the display panel 100, so as to improve the display picture quality of the display panel 100.

[0122] The second method: Please continue to refer to FIG11 , where the light adjustment portion 30A overlaps the opening area K. In this case, the light adjustment portion 30A can cover the buffer layer 11 overlapping the opening area K, so that the light adjustment portion 30A can be used to make at least part of the refraction angle γ of the light emitted by the light emitting unit 12 greater than or equal to The light emitted by the light-emitting unit 12 is incident on the adhesive layer 20, thereby improving the problem of total reflection of the light emitted by the light-emitting unit 12 at the interface between the buffer layer 11 and the light adjustment portion 30A in the opening area K. At the same time, it can also prevent the light processed by the light adjustment portion 30A from entering the opening area K of other sub-pixel areas P0 adjacent to the sub-pixel area P0 due to the light adjustment portion 30A being too large.

[0123] The third method, as shown in FIG12 , is that the light adjustment portion 30A is located in the opening area K. Based on this, the light adjustment portion 30A in the opening area K can be retracted by a certain distance so that the light adjustment portion 30A can substantially cover the buffer layer 11 overlapping with the opening area K, so that the light adjustment portion 30A can be used to make at least part of the refraction angle γ of the light emitted by the light emitting unit 12 greater than or equal to The light emitted by the light-emitting unit 12 is incident on the adhesive layer 20, thereby improving the problem of total reflection of the light at the interface between the buffer layer 11 and the light adjustment portion 30A in the opening area K. Furthermore, the size of the light adjustment portion 30A corresponding to the opening area K of the sub-pixel area P0 can be optimized, so that the light processed by the light adjustment portion 30A is not too large and does not enter the opening area K of other sub-pixel areas P0 adjacent to the sub-pixel area P0, causing problems such as color shift.

[0124] The following will take the third case where the light adjustment portion 30A is located in the opening area K as an example for description:

[0125] In some embodiments, referring to FIG. 12 , the light adjustment layer 30 includes a rough layer 31 .

[0126] The light adjustment layer 30 includes a rough layer 31. The first surface 111 of the buffer layer 11 away from the light emitting unit 12 is in contact with the rough layer 31. When the light emitted by the light emitting unit 12 enters the interface between the buffer layer 11 and the light adjustment layer 30, it is equivalent to the light entering the interface between the buffer layer 11 and the rough layer 31. Since the rough layer 31 has a certain degree of roughness, it can scatter the light, thereby destroying the probability of total reflection of the light at the interface between the buffer layer 11 and the rough layer 31. Therefore, the rough layer 31 can be used to make a large number or even all of the refraction angles γ greater than or equal to Light can enter the adhesive layer 20, that is, even if a large amount or even all of the light that would have been totally reflected in the buffer layer 11 enters the adhesive layer 20, the light that is totally reflected in the buffer layer 11 and emitted from the side surface 113 of the buffer layer 11 can be reduced. This can further improve the brightness of each sub-pixel region P0 in the display panel 100 and prevent light leakage in each pixel region P (light-emitting device E) in the display panel 100, thereby improving the display image quality of the display panel 100.

[0127] In some examples, the rough layer 31 includes a plurality of rough portions. That is, the light adjustment portion 30A is a rough portion. Furthermore, the rough portion can be configured to at least partially overlap with the opening area K.

[0128] Because a light-emitting unit 12 is located within an opening region K in a sub-pixel region P0, light emitted by the light-emitting unit 12 is emitted along the opening region K, thereby allowing light to be emitted from the sub-pixel region P0. Based on this, the rough layer 31 is patterned into a plurality of rough portions, and each rough portion is configured to at least partially overlap the opening region K. This allows the rough portions overlapping the opening region K to scatter light emitted by the light-emitting unit 12, thereby disrupting total internal reflection of the light emitted by the light-emitting unit 12 at the interface between the buffer layer 11 and the rough portion. This allows light emitted by the light-emitting unit 12 to be emitted from the display panel 100 along the opening region K, thereby ensuring the display quality of the display panel 100.

[0129] The rough portion and the opening area K at least partially overlap, including the following situations:

[0130] The first type: the rough portion is larger than the opening area K and covers the opening area K. In this case, the rough portion can better cover the buffer layer 11 overlapping the opening area K, so that the rough portion can be used to scatter the light emitted by the light-emitting unit 12, thereby improving the problem of total reflection of the light emitted by the light-emitting unit 12 at the interface between the buffer layer 11 and the rough portion in the opening area K, and improving the problem of light leakage in each pixel area P (light-emitting device E) in the display panel 100, which is conducive to improving the brightness of each sub-pixel area P0 in the display panel 100, thereby improving the display image quality of the display panel 100.

[0131] The second type: the rough portion overlaps the opening area K. In this case, the rough portion can cover the buffer layer 11 that overlaps the opening area K, allowing the rough portion to scatter the light emitted by the light-emitting unit 12, thereby improving the problem of total reflection of light emitted by the light-emitting unit 12 at the interface between the buffer layer 11 and the rough portion within the opening area K. At the same time, it can also prevent the rough portion corresponding to the opening area K of the sub-pixel area P0 from being too large, causing light scattered by the rough portion to enter the opening area K of other sub-pixel areas P0 adjacent to the sub-pixel area P0, causing problems such as color shift.

[0132] The third method is to position the rough portion within the opening area K. Based on this, the rough portion within the opening area K can be retracted a certain distance so that it can substantially cover the buffer layer 11 overlapping the opening area K. This allows the rough portion to scatter light emitted by the light-emitting unit 12, thereby improving the problem of total internal reflection of light emitted by the light-emitting unit 12 at the interface between the buffer layer 11 and the rough portion within the opening area K. Furthermore, the size of the rough portion corresponding to the opening area K of the sub-pixel region P0 can be optimized, so that it is not too large, causing light scattered by the rough portion to enter the opening area K of other sub-pixel regions P0 adjacent to the sub-pixel region P0, causing problems such as color shift.

[0133] In some embodiments, referring to FIG. 12 , the roughness of the rough layer 31 is approximately in the range of 10 nm to 100 nm.

[0134] When the roughness of the rough layer 31 is equal to or close to 10 nm, the roughness of the rough layer 31 is relatively low, which can help simplify the process difficulty of forming the rough layer 31. At the same time, the rough layer 31 can also meet the requirement of disrupting total internal reflection and scattering light. When the roughness of the rough layer 31 is equal to or close to 100 nm, the roughness of the rough layer 31 is relatively high, which can enable the rough layer 31 to more effectively disrupt total internal reflection and scatter light, while also meeting the existing process difficulty of forming the rough layer 31.

[0135] In some examples, the roughness of the rough layer 31 is in a range of approximately 30 nm to 100 nm. Alternatively, the roughness of the rough layer 31 is in a range of approximately 50 nm to 100 nm.

[0136] The roughness of the rough layer 31 can be made higher so that the rough layer 31 can more effectively disrupt total internal reflection of light and scatter the light. This reduces the probability of total internal reflection of light at the interface between the buffer layer 11 and the rough layer 31. This prevents light leakage from each pixel region P (light-emitting device E) within the display panel 100, thereby improving the display quality of the display panel 100.

[0137] In some examples, the roughness of rough layer 31 is approximately any one of 10 nm, 20 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 90 nm, or 100 nm. However, the present disclosure is not limited thereto.

[0138] In some embodiments, based on the fact that the light adjustment layer 30 includes the rough layer 31, the “light adjustment layer 30 is located on the side of the buffer layer 11 close to the adhesive layer 20”, that is, the rough layer 31 is located on the side of the buffer layer 11 close to the adhesive layer 20, can include the following situations:

[0139] The first type: the rough layer 31 is located between the buffer layer 11 and the adhesive layer 20 .

[0140] The second type: The rough layer 31 is located on the side of the buffer layer 11 closest to the adhesive layer 20. Since the first surface of the buffer layer 11, which is located on the side closest to the adhesive layer 20, is also located on the side of the buffer layer 11 closest to the adhesive layer 20, it can be understood that the rough layer 31 is located on the side of the buffer layer 11 closest to the adhesive layer 20.

[0141] The following first introduces the first situation with reference to the accompanying drawings:

[0142] FIG13 is a cross-sectional view of a display panel according to yet other embodiments.

[0143] In some other embodiments, referring to FIG. 14 , the rough layer 31 may include a plurality of scattering particles 31A.

[0144] A plurality of scattering particles 31A are provided in the rough layer 31 , which can increase the probability of scattering of light emitted by the light emitting unit 12 when it strikes the rough layer 31 , and can better reduce the probability of total reflection of light.

[0145] Based on this, the multiple scattering particles 31A in the rough layer 31 can be used to effectively improve the problem of full emission of light emitted by the light-emitting unit 12 at the interface between the buffer layer 11 and the light adjustment layer 30 (rough layer 31), which is beneficial to prevent light leakage in each pixel area P (light-emitting device E) in the display panel 100, thereby improving the display image quality of the display panel 100.

[0146] In some examples, the rough layer 31 may include a base material 31B and a plurality of scattering particles 31A distributed in the base material 31B.

[0147] For example, multiple scattering particles 31A are evenly distributed in the substrate 31B. The multiple scattering particles 31A can be evenly distributed in the rough layer 31 so that the rough layer 31 at each location can use the scattering particles 31A to scatter light irradiated at the interface between the buffer layer 11 and the light adjustment layer 30 (rough layer 31), thereby reducing the amount of fully emitted light, thereby preventing light leakage from each pixel area P (light-emitting device E) in the display panel 100 and improving the display image quality of the display panel 100.

[0148] In some examples, the ratio of the refractive index of the scattering particles 31A to the refractive index of the substrate 31B is approximately in the range of 0.91 to 0.97, or in the range of 1.03 to 1.09.

[0149] That is, the refractive index of the scattering particles 31A can be set to be greater than the refractive index of the substrate 31B, or the refractive index of the scattering particles 31A can be set to be less than the refractive index of the substrate 31B, as long as the difference between the refractive index of the scattering particles 31A and the refractive index of the substrate 31B is ensured to be in the range of 0.03 to 0.09.

[0150] Based on this, the difference between the refractive index of the scattering particles 31A and the refractive index of the substrate 31B can be kept relatively small, and the diffusivity and transmittance of the rough layer 31 can be improved. The multiple scattering particles 31A in the rough layer 31 can be used to effectively improve the problem of full reflection of light emitted by the light-emitting unit 12 at the interface between the buffer layer 11 and the light-regulating layer 30 (rough layer 31), thereby preventing light leakage from each pixel region P (light-emitting device E) within the display panel 100, thereby improving the display quality of the display panel 100.

[0151] In some examples, the ratio of the sum of the volumes of the scattering particles 31A to the volume of the substrate 31B is less than or equal to 2%. This prevents excessive concentration of the scattering particles 31A in the substrate 31B, which could result in a high haze and low transmittance in the roughened layer 31. This could, in turn, affect the light transmittance within the display panel 100, thereby affecting the brightness of the display panel 100 and the image quality of the display panel 100.

[0152] In some examples, the material of the scattering particles 31A may be an organic material. For example, the material of the scattering particles 31A may be at least one of acrylic, silicone, or polyethylene. For example, the material of the scattering particles 31A may be acrylic or silicone.

[0153] In other examples, the material of the scattering particles 31A may be an inorganic material. For example, the material of the scattering particles 31A may be at least one of nano-barium sulfate, silicon dioxide, or calcium carbonate.

[0154] In some examples, the material of the substrate 31B can be a high-transmittance material. For example, the material of the substrate 31B can be at least one of polymethyl methacrylate (PMMA), polystyrene (PS), or polycarbonate (PC).

[0155] The above embodiment describes the first position of the rough layer 31 with reference to the accompanying drawings. The following describes the second position of the rough layer 31 with reference to the accompanying drawings:

[0156] FIG14 is a cross-sectional view of a display panel according to yet other embodiments.

[0157] In some embodiments, as shown in FIG. 14 , the buffer layer 11 includes a first surface 111 on a side adjacent to the adhesive layer 20. The first surface 111 includes a plurality of rough areas 111A. The plurality of rough areas 111A in the first surface 111 serve as the rough layer 31. FIG. 14 only depicts the rough areas 111A using a plurality of elliptical patterns, but does not represent the roughness or structure of the rough areas 111A.

[0158] The buffer layer 11, including the first surface 111 on the side close to the adhesive layer 20, can be roughened to form a plurality of rough regions 111A on the first surface 111. The first surface 111 at the plurality of rough regions 111A can be reused as the rough layer 31. The plurality of rough regions 111A formed on the first surface 111 can be utilized to scatter a large amount, or even all, of the light that would otherwise be totally reflected in the buffer layer 11 and emitted from the side 113 of the buffer layer 11. This can reduce the amount of light that is totally reflected in the buffer layer 11 and emitted from the side surface 113 of the buffer layer 11. This can further improve the brightness of each sub-pixel region P0 in the display panel 100 and prevent light leakage in each pixel region P (light-emitting device E) in the display panel 100, thereby improving the display image quality of the display panel 100.

[0159] In addition, since the first surface 111 at multiple rough areas 111A is reused as the rough layer 31, after the buffer layer 11 including the first surface 111 on the side close to the adhesive layer 20 is roughened, there is no need to add an independent rough layer 31 in the display panel 100, which is not only beneficial to saving resources, but also beneficial to making the display panel 100 lighter and thinner.

[0160] In some examples, referring to FIG. 14 , the roughness of the first surface 111 at the rough area 111A may be set to be in a range of about 10 nm to 100 nm.

[0161] When the roughness of the first surface 111 at the rough region 111A is equal to or close to 10 nm, the roughness of the first surface 111 at the rough region 111A is relatively low, which can facilitate simplifying the roughening process of the buffer layer 11, including the first surface 111 on the side close to the adhesive layer 20. Furthermore, the first surface 111 at the rough region 111A can also meet the requirement of disrupting total internal reflection and causing light to scatter. When the roughness of the first surface 111 at the rough region 111A is equal to or close to 100 nm, the roughness of the first surface 111 at the rough region 111A is relatively high, which can more effectively disrupt total internal reflection of light at the rough region 111A and cause light to scatter. Furthermore, the precision requirement of the existing roughening process for the first surface 111 can also be met.

[0162] FIG15 is a cross-sectional view of a display panel according to yet other embodiments.

[0163] In some embodiments, referring to FIG. 15 , the light adjustment layer 30 includes a light focusing layer 32 .

[0164] The light adjustment layer 30 includes a light collecting layer 32. The first surface 111 of the buffer layer 11, which is away from the light emitting unit 12, contacts the light collecting layer 32. When the light emitted by the light emitting unit 12 enters the interface between the buffer layer 11 and the light adjustment layer 30, it is equivalent to the light entering the interface between the buffer layer 11 and the light collecting layer 32. The refractive index and structure of the light collecting layer 32 can be used to make the partial refraction angle γ greater than or equal to Light can enter the adhesive layer 20, which means that some light that would otherwise be totally reflected in the buffer layer 11 can enter the adhesive layer 20, reducing the amount of light that is totally reflected in the buffer layer 11 and emitted from the side surface 113 of the buffer layer 11. This can help improve the brightness of each sub-pixel region P0 in the display panel 100 and prevent light leakage in each pixel region P (light-emitting device E) in the display panel 100, thereby improving the display image quality of the display panel 100. The refractive index and structure of the light-collecting layer 32 will be described in detail below with reference to the accompanying drawings.

[0165] In some examples, the light-collecting layer 32 includes a plurality of light-collecting portions. That is, the light-adjusting portion 30A is a light-collecting portion, and the light-collecting portion at least partially overlaps with the opening area K.

[0166] Because one light-emitting unit 12 is located within the opening area K in one sub-pixel region P0, the light emitted by the light-emitting unit 12 is emitted along the opening area K, so that the sub-pixel region P0 emits light. Based on this, the light-collecting layer 32 is patterned into multiple light-collecting portions, and the light-collecting portions are arranged to at least partially overlap with the opening area K. This allows the light-collecting portions overlapping with the opening area K to allow more light emitted by more light-emitting units 12 at a larger refraction angle γ to enter the adhesive layer 20 without undergoing total internal reflection. This can, to a certain extent, alleviate the problem of total internal reflection of light emitted by the light-emitting unit 12 at the interface between the buffer layer 11 and the light-collecting portion, allowing more light emitted by the light-emitting unit 12 to be emitted from the display panel 100 along the opening area K, thereby ensuring the display image quality of the display panel 100.

[0167] The light-focusing portion and the opening area K at least partially overlap, including the following situations:

[0168] The first is that the size of the light-collecting portion is larger than the opening area K, and the light-collecting portion covers the opening area K. In this case, the light-collecting portion can better cover the buffer layer 11 overlapping with the opening area K, so that the light-collecting portion can be used to allow more light emitted by the light-emitting unit 12 with a larger refraction angle γ to enter the adhesive layer 20 without being totally reflected. This improves the problem of light emitted by the light-emitting unit 12 being totally reflected at the interface between the buffer layer 11 and the light-collecting portion in the opening area K, improves the problem of light leakage in each pixel area P (light-emitting device E) in the display panel 100, and helps to improve the brightness of each sub-pixel area P0 in the display panel 100, thereby improving the display image quality of the display panel 100.

[0169] The second type: the light-focusing portion overlaps the opening area K. In this case, the light-focusing portion can cover the buffer layer 11 that overlaps with the opening area K, so that the light-focusing portion can be used to allow more light emitted by the light-emitting unit 12 with a larger refraction angle γ to enter the adhesive layer 20 without being totally reflected, thereby improving the problem of light emitted by the light-emitting unit 12 being totally reflected at the interface between the buffer layer 11 and the light-focusing portion within the opening area K. At the same time, it can also prevent the light refracted by the light-focusing portion from entering the opening area K of other sub-pixel areas P0 adjacent to the sub-pixel area P0 due to the light-focusing portion being too large, thereby preventing the light from being refracted by the light-focusing portion from entering the opening area K of other sub-pixel areas P0 adjacent to the sub-pixel area P0, causing problems such as color shift.

[0170] The third type: the light-focusing portion is located within the opening area K. Based on this, the light-focusing portion within the opening area K can be retracted a certain distance so that it can basically cover the buffer layer 11 overlapping with the opening area K. This allows the light-focusing portion to refract more light with a larger refraction angle γ emitted by the light-emitting unit 12 and allow it to enter the adhesive layer 20, thereby improving the problem of total reflection of light emitted by the light-emitting unit 12 at the interface between the buffer layer 11 and the light-focusing portion within the opening area K. Furthermore, the size of the light-focusing portion corresponding to the opening area K of the sub-pixel area P0 can be optimized, so that it is not too large, causing light refracted by the light-focusing portion to enter the opening area K of other sub-pixel areas P0 adjacent to the sub-pixel area P0, causing problems such as color shift.

[0171] The following will take the third case where the light focusing portion is located within the opening area K as an example for description:

[0172] How to adjust the refractive index and structure of the light-gathering layer 32 so that the partial refraction angle γ is greater than or equal to The light can enter the adhesive layer 20. The refractive index of the light-collecting layer 32 will be described below with reference to the accompanying drawings:

[0173] In some embodiments, referring to FIG. 15 , the refractive index of the light-concentrating layer 32 is greater than or equal to the refractive index of the adhesive layer 20 , and the refractive index of the light-concentrating layer 32 is less than or equal to the refractive index of the buffer layer 11 .

[0174] The focusing layer 32 is arranged between the buffer layer 11 and the adhesive layer 20 , and the refractive index of the focusing layer 32 is set between the refractive index of the buffer layer 11 and the refractive index of the adhesive layer 20 . The focusing layer 32 is equivalent to a transition layer between the buffer layer 11 and the adhesive layer 20 .

[0175] The critical angle for full emission when the light emitted by the light emitting unit 12 hits the interface between the buffer layer 11 and the light focusing layer 32 is Wherein, n3 is the refractive index of the light-gathering layer 32. Since the refractive index n3 of the light-gathering layer 32 is greater than the refractive index n2 of the adhesive layer 20, the critical angle of total reflection at the interface between the buffer layer 11 and the light-gathering layer 32 can be Greater than the critical angle for full emission at the interface between the buffer layer 11 and the adhesive layer 20 It can be understood that after adding the light-gathering layer 32 between the buffer layer 11 and the adhesive layer 20 of the display panel 100, the critical angle of total reflection at the interface between the upper surface 111 of the buffer layer 11 and its adjacent film layer is relatively increased. The light can be refracted at the interface between the buffer layer 11 and the light-concentrating layer 32 and enter the light-concentrating layer 32 .

[0176] Furthermore, since the refractive index of the light-gathering layer 32 is smaller than that of the buffer layer 11, the critical angle for total reflection at the interface between the light-gathering layer 32 and the adhesive layer 20 can be set to Greater than the critical angle for full emission at the interface between the buffer layer 11 and the adhesive layer 20 Furthermore, after the focusing layer 32 is added between the buffer layer 11 and the adhesive layer 20 of the display panel 100, both the critical angle for full emission at the interface between the focusing layer 32 and the adhesive layer 20 and the critical angle for full emission at the interface between the focusing layer 32 and the buffer layer 11 are increased to a certain extent relative to the critical angle for full emission at the interface between the buffer layer 11 and the adhesive layer 20.

[0177] Based on this, more refraction angles can be made greater than or equal to The light can be refracted at the interface between the buffer layer 11 and the light-gathering layer 32 and enter the light-gathering layer 32, and then enter the adhesive layer 20 through the refraction of the light-gathering layer 32. In other words, some of the light that would have been totally reflected in the buffer layer 11 can be made to enter the adhesive layer 20, which can reduce the light that is totally reflected in the buffer layer 11 and emitted from the side surface 113 of the buffer layer 11. This can further help improve the brightness of each sub-pixel region P0 in the display panel 100, and can also prevent the problem of light leakage in each pixel region P (light-emitting device E) in the display panel 100, thereby improving the display image quality of the display panel 100.

[0178] In some embodiments, the light focusing portion may be made of a transparent material. For example, the light focusing portion may be made of rubber, silicon nitride, silicon oxide, or silicone. However, some embodiments of the present disclosure are not limited thereto.

[0179] In some examples, the light focusing portion includes at least one protrusion 321. The cross section of the protrusion 321 can be semicircular or triangular. However, some embodiments of the present disclosure are not limited thereto, and the protrusion 321 can be a structure protruding toward the adhesive layer 20.

[0180] Figure 16 is a diagram of a light path in Q in Figure 15. Figure 17 is another diagram of a light path in Q in Figure 15.

[0181] In some embodiments, referring to FIG. 16 and FIG. 17 , when the refractive index n3 of the light-collecting layer 32 is greater than the refractive index n2 of the adhesive layer 20 and the refractive index n3 of the light-collecting layer 32 is less than the refractive index n1 of the buffer layer 11, that is, n1>n3>n2, the light-collecting portion may include at least one protrusion 321, the cross section of the protrusion 321 being triangular, and the base angle α of the protrusion 321 satisfying: Wherein, n3 is the refractive index of the light-collecting layer.

[0182] Since the refractive index n3 of the light-gathering layer 32 is smaller than the refractive index n1 of the buffer layer 11, in order to prevent the total reflection from occurring at the interface between the buffer layer 11 and the light-gathering layer 32, the incident angle of the light in the buffer layer 11 to the protrusion 321 needs to be set to

[0183] Continuing with FIG16 , the relationship between the various angles within the protrusion 321 satisfies the following: 90° - δ = θ + β = 90° - α + β, α = β + δ. Here, δ is the angle of refraction of light into the protrusion 321, β is the angle of incidence of light within the protrusion 321 when it strikes the side of the protrusion 321, α is the base angle of the protrusion 321, and θ is the complementary angle of the base angle α of the protrusion 321.

[0184] Since the refractive index n3 of the light-gathering layer 32 is greater than the refractive index n2 of the adhesive layer 20, the incident angle β needs to be set to be less than the critical angle That is, the maximum value of the incident angle β approaches And, to ensure that at least part of the refraction angle γ is greater than or equal to The light enters the adhesive layer 20, and the incident angle needs to be set

[0185] Moreover, when light is incident from the high refractive index buffer layer 11 to the low refractive index focusing layer 32, the refraction angle δ will be greater than the incident angle ζ, and the refraction angle can be obtained.

[0186] As mentioned above, it can be seen that the maximum range of α can be That is,

[0187] Continuing with FIG17 , the relationship between the various angles within the protrusion 321 satisfies the following: 90° - δ = θ + β = 90° - α + β, α = δ - β. Here, δ is the angle of refraction of light into the protrusion 321, β is the angle of incidence of light within the protrusion 321 when it strikes the side of the protrusion 321, α is the base angle of the protrusion 321, and θ is the complementary angle of the base angle α of the protrusion 321.

[0188] Since the refractive index n3 of the light-gathering layer 32 is greater than the refractive index n2 of the adhesive layer 20, the incident angle β needs to be set to be less than the critical angle That is, And, to ensure that at least part of the refraction angle γ is greater than or equal to The light enters the adhesive layer 20, and the incident angle needs to be set

[0189] Moreover, when light is incident from the high refractive index buffer layer 11 to the low refractive index focusing layer 32, the refraction angle δ will be greater than the incident angle ζ, and the refraction angle can be obtained.

[0190] based on, and It can be known

[0191] In summary, the bottom angle α of the raised portion 321 satisfies: When at least part of the refraction angle γ is greater than or equal to The light is incident on the adhesive layer 20, and the incident angle β when the light in the focusing layer 32 is refracted to the interface between the protrusion 321 and the adhesive layer 20 is less than the critical angle This is to prevent the light in the focusing layer 32 from being refracted to the interface between the protrusion 321 and the adhesive layer 20 and causing full emission, so that the light incident on the protrusion 321 can be refracted into the adhesive layer 20, which can help prevent the problem of light leakage in each pixel area P (light-emitting device E) in the display panel 100, thereby improving the display image quality of the display panel 100.

[0192] In some embodiments, please continue to refer to Figures 16 and 17, where the refractive index n3 of the focusing layer 32 is set to be greater than the refractive index n2 of the adhesive layer 20, the refractive index n3 of the focusing layer 32 is less than the refractive index n1 of the buffer layer 11, and the focusing portion is set to include at least one protrusion 321, and the cross-section of the protrusion 321 is triangular.

[0193] In some examples, as shown in FIG16 , the refractive index n3 of the light-concentrating layer 32 is greater than the refractive index n2 of the adhesive layer 20. This allows the incident angle β to be smaller than the refractive angle when irradiating the interface between the raised portion 321 and the adhesive layer 20. Furthermore, because the raised portion 321 has a triangular cross-section, light emitted from the interface between the raised portion 321 and the adhesive layer 20 can be deflected toward the center of the opening area K (referring to FIG15 ). This means that the raised portion 321 can be used to converge wide-angle light within the display panel 100, preventing color cross-talk between adjacent sub-pixel regions and preventing color shift.

[0194] In some examples, referring to FIG. 17 , because the cross-section of the raised portion 321 is triangular, some light rays that pass through the raised portion 321 toward the buffer layer 11 and are refracted to the adhesive layer 20 may strike an adjacent raised portion 321 and then be further reflected by the adjacent raised portion 321 out of the display panel 100. Light rays reflected by adjacent raised portions 321 may be deflected toward the center of the opening area K (as shown in FIG. 15 ). In other words, the raised portions 321 may be used to converge light rays at large angles within the display panel 100, thereby preventing color crosstalk and color shift between adjacent sub-pixel regions.

[0195] In some examples, please continue to refer to FIG. 17 , the bottom angle α of the protrusion 321 may be set to be greater than or equal to 40°.

[0196] Based on this, when the base angle α of the protrusion 321 is equal to or close to 40°, the height of the protrusion 321 can be made sufficient to ensure that light refracted through the protrusion 321 toward the buffer layer 11 and then to the adhesive layer 20 can be irradiated onto adjacent protrusions 321 and further reflected by the adjacent protrusions 321 to exit the display panel 100. However, some embodiments of the present disclosure are not limited thereto.

[0197] In some examples, please continue to refer to FIG. 17 , the bottom angle α of the protrusion 321 may be set to be less than or equal to 60°.

[0198] When the base angle α of the raised portion 321 is equal to or close to 60°, not only can the light refracted from the raised portion 321 toward the buffer layer 11 and then to the adhesive layer 20 be irradiated onto the adjacent raised portion 321 and further reflected by the adjacent raised portion 321 to exit the display panel 100, but it can also meet the requirements of existing manufacturing processes. For example, it can meet the requirements of using a photolithography process or a nanoimprint process to manufacture the raised portion 321. However, some embodiments of the present disclosure are not limited to this.

[0199] Figure 18 is another optical path diagram within Q in Figure 15. Figure 19 is another optical path diagram within Q in Figure 15.

[0200] In some embodiments, as shown in Figures 18 and 19, the refractive index n3 of the light-collecting layer 32 is greater than the refractive index n1 of the buffer layer 11, that is, n3>n1>n2. The light-collecting portion includes at least one protrusion 321, the cross section of the protrusion 321 is triangular, and the base angle α of the protrusion 321 satisfies: Wherein, n3 is the refractive index of the light-collecting layer.

[0201] Due to the setting, the refractive index n3 of the focusing layer 32 is greater than the refractive index n1 of the buffer layer 11, that is, when the light is incident on the focusing layer 32 from the buffer layer 11, it is the light entering from the medium with a lower refractive index to the medium with a higher refractive index, and no total reflection will occur at the interface between the buffer layer 11 and the protrusion 321, so that light at any angle can be incident on the buffer layer 11 and the protrusion 321 in turn.

[0202] According to the law of refraction, n3×sinζ=n1×sinδ. Based on the above statement, there is no need to limit the magnitude of the incident angle ζ of the light in the buffer layer 11 irradiating the protrusion 321. The value range of sinζ should be 0 to 1. Furthermore, the range of the refraction angle δ of the light refracted into the protrusion 321 should be That is, the refraction angle

[0203] Continuing with FIG18 , the relationship between the various angles within the protrusion 321 satisfies the following: 90° - δ = θ + β = 90° - α + β, α = β + δ. Here, δ is the angle of refraction of light into the protrusion 321, β is the angle of incidence of light within the protrusion 321 when it strikes the side of the protrusion 321, α is the base angle of the protrusion 321, and θ is the complementary angle of the base angle α of the protrusion 321.

[0204] Since the refractive index n3 of the light-gathering layer 32 is greater than the refractive index n2 of the adhesive layer 20, the incident angle β needs to be set to be less than the critical angle

[0205] based on, and It can be seen that α<β+δ,

[0206] Continuing with FIG19 , the relationship between the various angles within the protrusion 321 satisfies the following: 90° - δ = θ + β = 90° - α + β, α = δ - β. Here, δ is the angle of refraction of light into the protrusion 321, β is the angle of incidence of light within the protrusion 321 when it strikes the side of the protrusion 321, α is the base angle of the protrusion 321, and θ is the complementary angle of the base angle α of the protrusion 321.

[0207] Since the refractive index n3 of the light-gathering layer 32 is greater than the refractive index n2 of the adhesive layer 20, the incident angle β needs to be set to be less than the critical angle

[0208] based on, and It can be seen that α<δ-β,

[0209] In summary, the bottom angle α of the raised portion 321 satisfies: When the incident angle β of the light in the light-gathering layer 32 is refracted to the interface between the protrusion 321 and the adhesive layer 20 is less than the critical angle This is to prevent the light in the focusing layer 32 from being refracted to the interface between the protrusion 321 and the adhesive layer 20 and causing full emission, so that the light incident on the protrusion 321 can be refracted into the adhesive layer 20, which can help prevent the problem of light leakage in each pixel area P (light-emitting device E) in the display panel 100, thereby improving the display image quality of the display panel 100.

[0210] In addition, When , the base angle α of the protrusion 321 satisfies:

[0211] In some examples, as shown in FIG18 , the refractive index n3 of the light-concentrating layer 32 is greater than the refractive index n2 of the adhesive layer 20. This allows the incident angle β to be smaller than the refractive angle when irradiating the interface between the raised portion 321 and the adhesive layer 20. Furthermore, because the raised portion 321 has a triangular cross-section, light emitted from the interface between the raised portion 321 and the adhesive layer 20 can be deflected toward the center of the opening area K (referring to FIG15 ). This means that the raised portion 321 can be used to converge wide-angle light within the display panel 100, preventing color cross-talk between adjacent sub-pixel regions and preventing color shift.

[0212] In some examples, referring to FIG. 19 , because the cross-section of the raised portion 321 is triangular, some light rays that pass through the raised portion 321 toward the buffer layer 11 and are refracted to the adhesive layer 20 may strike an adjacent raised portion 321 and then be further reflected by the adjacent raised portion 321 out of the display panel 100. Light rays reflected by adjacent raised portions 321 may be deflected toward the center of the opening area K (as shown in FIG. 15 ). In other words, the raised portions 321 may be used to converge light rays at large angles within the display panel 100, thereby preventing color crosstalk and color shift between adjacent sub-pixel regions.

[0213] In some examples, the cross section of the raised portion 321 is an isosceles triangle. This configuration can facilitate adjustment and production of the raised portion 321 to form the light-collecting layer 32. However, some embodiments of the present disclosure are not limited thereto.

[0214] FIG20 is a cross-sectional view of a display panel according to yet other embodiments.

[0215] In some embodiments, as shown in FIG. 20 , the display panel 100 further includes a light shielding portion 322 that isolates the plurality of light adjustment portions 30A. The light shielding portion 322 is disposed between adjacent light adjustment portions 30A to prevent light from the light-emitting unit 12 from entering the opening area K of the adjacent sub-pixel region P0, which could cause color shift and other issues.

[0216] In some examples, the material of the light shielding portion 322 can be carbon black plus acrylic resin. However, the present disclosure is not limited thereto. Other adhesive and light-shielding materials can also be used to form the light shielding portion 322.

[0217] 20 illustrates an example in which the light adjustment layer 30 is a light focusing layer 32 .

[0218] In some examples, please refer to Figure 20, when the light adjustment part 30A is the focusing part in the focusing layer 32, it is equivalent to setting the shading part 322 on the same layer as the focusing layer 32, and setting the shading part 322 between two adjacent focusing parts (light adjustment part 30A) in the focusing layer 32.

[0219] In other examples, when the light adjustment portion 30A is a rough portion in the rough layer 31 , it is equivalent to setting the shading portion 322 in the same layer as the rough layer 31 and setting the shading portion 322 between two adjacent rough portions (light adjustment portions 30A) in the rough layer 31 .

[0220] FIG21 is a cross-sectional view of a display panel according to yet other embodiments.

[0221] 21 , the light adjustment layer 30 includes a rough layer 31 and a light focusing layer 32. The light focusing layer 32 is located on the side of the rough layer 31 away from the buffer layer 11, that is, the rough layer 31 is disposed between the light focusing layer 32 and the buffer layer 11.

[0222] When the rough layer 31 is used to scatter the light emitted by the light-emitting unit 12 to destroy the total reflection of the light at the interface between the buffer layer 11 and the rough portion in the opening area K, part of the light may be scattered through the rough layer 31 to the opening area K of the adjacent sub-pixel area P0, which may easily lead to problems such as cross-color and color deviation.

[0223] Based on the above embodiments, it can be seen that the light-gathering layer 32 can converge light to a certain extent. Furthermore, a light-gathering layer 32 can be provided on the side of the rough layer 31 away from the buffer layer 11. This light-gathering layer 32 not only allows light to enter the adhesive layer 20 but also converges light scattered by the rough layer 31 to a certain extent, thereby preventing light from the light-emitting unit 12 from entering the opening area K of the adjacent sub-pixel region P0, causing problems such as color shift.

[0224] It should be noted that the rough layer 31 described in any of the above embodiments can be combined with the light-collecting layer 32 described in any of the above embodiments to solve the problems of light leakage and color shift of the display panel 100 .

[0225] In some examples, referring to FIG. 21 , where the light-regulating layer 30 includes a rough layer 31 and a light-focusing layer 32, the light-regulating portion 30A in the light-regulating layer 30 is composed of a rough portion within the rough layer 31 and a light-focusing portion within the light-focusing layer 32. The thickness of the light-shielding portion 322 can be set to be approximately equal to the sum of the thicknesses of the rough layer 31 and the light-focusing layer 32. That is, the surface of the light-shielding portion 322 near the buffer layer 11 can be set to be approximately flush with the surface of the rough layer 31 near the buffer layer 11, and the surface of the light-shielding portion 322 away from the buffer layer 11 can be flush with the surface of the light-focusing layer 32 away from the buffer layer 11. This is equivalent to using the light-shielding portion 322 to simultaneously isolate multiple light-focusing portions and the rough portion. The light-shielding portion 322 can be better utilized to prevent light from the light-emitting unit 12 from entering the opening area K of the adjacent sub-pixel region P0, causing problems such as color shift.

[0226] 20 and 21 , the sub-pixel region P0 in the display panel 100 further includes a non-opening region F surrounding the opening region K. The light shielding portion 322 may at least partially overlap with the non-opening region F.

[0227] Because the light adjusting portion 30A contacts the light shielding portion 322, the degree of overlap between the light shielding portion 322 and the non-opening area F can be determined based on the degree of overlap between the light adjusting portion 30A and the opening area K. Furthermore, when the light adjusting portion 30A and the light shielding portion 322 are in contact, light can be prevented from entering the opening area K of the adjacent sub-pixel region P0 through the edge of the light adjusting portion 30A, thereby preventing problems such as color shift.

[0228] For example, the light shielding portion 322 may substantially overlap with the non-opening area F, which may reduce the space occupied by the light shielding portion 322 in the opening area K, thereby preventing the light shielding portion 322 from affecting the aperture ratio of the display panel 100 .

[0229] FIG. 22 is a cross-sectional view of a display panel according to yet other embodiments.

[0230] In some embodiments, referring to FIG. 22 , the display panel 100 further includes an optical conversion layer 40 . The optical conversion layer 40 is located on a side of the adhesive layer 20 away from the light adjustment layer 30 .

[0231] The light-emitting units 12 in different sub-pixel regions P0 can emit light of the same color. These light rays of the same color can be converted into light of different colors by the optical conversion layer 40. Based on this, the multiple sub-pixel regions P0 in the display panel 100 can emit light of different colors. That is, the first sub-pixel region P1 in the display panel 100 can emit red light, the second sub-pixel region P2 can emit green light, and the third sub-pixel region P3 can emit blue light to form a display image.

[0232] The optical conversion layer 40 includes multiple color conversion sections 42. The orthographic projection of one color conversion section 42 on the adhesive layer 20 at least partially overlaps with the orthographic projection of one light-emitting unit 12 on the adhesive layer 20. This arrangement allows the color conversion sections 42 to modulate the light emitted by the light-emitting unit 12 so that each sub-pixel region P0 emits a target light beam, thereby forming a display image.

[0233] 22 , the color conversion unit 42 includes a first color conversion unit 421. The first color conversion unit 42 is configured to convert the light emitted by the light emitting unit 12 into a target color so that the sub-pixel region P0 corresponding to the light emitting unit 12 emits the target light.

[0234] In some examples, the first type of color conversion portion 421 (Quantum-Dot, QD for short) is typically a film layer formed of an organic material with quantum dot material added thereto, and achieves light conversion through the quantum dot material.

[0235] In some examples, the first color conversion portion 421 includes a red quantum dot portion 421a and a green quantum dot portion 421b. Different quantum dot materials emit light of different wavelengths after being excited by an excitation light source. For example, the red quantum dot portion 421a can convert light emitted by the light-emitting unit 12 into red light, and the green quantum dot portion 421b can convert light emitted by the light-emitting unit 12 into green light.

[0236] Based on this, the sub-pixel area P0 where the light-emitting unit 12 corresponding to the red quantum dot portion 421a is located can emit red light, and the sub-pixel area P0 where the light-emitting unit 12 corresponding to the green quantum dot portion 421b is located can emit green light, so that the display panel 100 can realize the display image.

[0237] In some embodiments, referring to FIG. 22 , the color conversion unit 42 further includes a second color conversion unit 422. The second color conversion unit 42 is configured to directly transmit light emitted by the light-emitting unit 12. The second color conversion unit 422 does not convert the wavelength of the light and directly transmits the light emitted by the light-emitting unit 12. This allows the sub-pixel region P0 of the light-emitting unit 12 corresponding to the second color conversion unit 422 to directly emit the color light provided by the light-emitting unit 12.

[0238] In some examples, the second color conversion portion 422 includes a transparent portion having scattering particles. The scattering particles in the transparent portion can cause light emitted by the light-emitting unit 12 to be continuously refracted, reflected, and scattered within the second color conversion portion 422 as it passes through the second color conversion portion 422, thereby diffusing the light emitted by the light-emitting unit 12.

[0239] The light emitting unit 12 is described as a blue light emitting diode chip as an example:

[0240] The red quantum dot portion 421 a is located in the first sub-pixel region P1 , the green quantum dot portion 421 b is located in the second sub-pixel region P2 , and the second color conversion portion 422 is located in the third sub-pixel region P3 .

[0241] The blue light emitted by the light-emitting unit 12 in the first sub-pixel region P1 can be converted into red light by the red quantum dot portion 421a, causing the first sub-pixel region P1 to emit red light. The blue light emitted by the light-emitting unit 12 in the second sub-pixel region P2 can be converted into green light by the green quantum dot portion 421b, causing the second sub-pixel region P2 to emit green light. Furthermore, the blue light emitted by the light-emitting unit 22 in the third sub-pixel region P3 can directly pass through the second color conversion portion 422, causing the third sub-pixel region P3 to emit blue light.

[0242] Based on this, different color conversion units 42 can be used to make the first sub-pixel region P1 in the display panel 100 emit red light, the second sub-pixel region P2 emit green light, and the third sub-pixel region P3 emit blue light to form a display image.

[0243] In some embodiments, referring to FIG. 22 , the optical conversion layer 40 further includes a shielding portion 41. The shielding portion 41 separates the plurality of color conversion portions 42. The shielding portion 41 can be used to prevent the colored lights emitted by two adjacent color conversion portions 42 from interfering with each other and causing cross-color problems.

[0244] In some examples, the shielding portion 41 may be made of a light-shielding material. For example, the shielding portion 41 may be made of a black resin. However, some embodiments of the present disclosure are not limited thereto.

[0245] In some embodiments, referring to FIG. 22 , the orthographic projection of the color conversion portion 42 on the adhesive layer 20 may be provided to cover the orthographic projection of the light emitting unit 12 on the adhesive layer 20 .

[0246] Because the light emitted by the light-emitting unit 12 tends to diverge, the color conversion portion 42 can be designed to be larger than the size of the light-emitting unit 12, so that the orthographic projection of the color conversion portion 42 on the adhesive layer 20 overlaps the orthographic projection of the light-emitting unit 12 on the adhesive layer 20. This ensures that as much light as possible from the light-emitting unit 12 enters the color conversion portion 42, allowing the color conversion portion 42 to adjust the light and emit the desired light. Furthermore, this prevents light from the light-emitting unit 12 from irradiating adjacent color conversion portions 42, potentially causing color shift in the display panel 100.

[0247] It is understood that in other embodiments, the orthographic projection of the color conversion portion 42 on the adhesive layer 20 may be arranged to partially overlap with the orthographic projection of the light-emitting unit 12 on the adhesive layer 20. In still other embodiments, the orthographic projection of the color conversion portion 42 on the adhesive layer 20 may be arranged to overlap with the orthographic projection of the light-emitting unit 12 on the adhesive layer 20. However, some embodiments of the present disclosure are not limited to this.

[0248] FIG23 is a cross-sectional view of a display panel according to yet other embodiments.

[0249] In some embodiments, as shown in FIG. 23 , the display panel 100 further includes a color filter layer 50. The color filter layer 50 is located on a side of the optical conversion layer 40 away from the adhesive layer 20. The color filter layer 50 includes a plurality of filter units 51. The orthographic projections of the filter units 51 on the adhesive layer 20 at least partially overlap with the orthographic projections of the light-emitting units 12 on the adhesive layer 20. The filter units 51 can be configured to transmit light emitted by the light-emitting units 12 and converted by the corresponding color conversion units 42.

[0250] In some examples, the plurality of filter units 51 include a first color filter unit 511 , a second color filter unit 512 , and a third color filter unit 513 .

[0251] The first color filter unit 511 is disposed opposite the red quantum dot portion 421a and is located in the first sub-pixel region P1. The first color filter unit 511 transmits red light. The second color filter unit 512 is disposed opposite the green quantum dot portion 421b and is located in the second sub-pixel region P2. The second color filter unit 512 transmits green light. Furthermore, the third color filter unit 513 is disposed opposite the second color conversion portion 422 and is located in the third sub-pixel region P3. The third color filter unit 513 transmits blue light.

[0252] In some embodiments, as shown in FIG23 , the color filter layer 50 further includes a black matrix 52 that separates the plurality of filter units 51. The black matrix 52 can be used to prevent the colored lights emitted by two adjacent filter units 51 from interfering with each other and causing cross-color problems.

[0253] In some examples, the material of the black matrix 52 may be a light shielding material. For example, the material of the black matrix 52 may be a black resin. However, some embodiments of the present disclosure are not limited thereto.

[0254] In some embodiments, referring to FIG. 23 , the orthographic projection of the color conversion portion 42 on the adhesive layer 20 covers the orthographic projection of the filter unit 51 on the adhesive layer 20 .

[0255] By setting the size of the filter unit 51 to be smaller than that of the color conversion portion 42, that is, setting the size of the black matrix 52 to be smaller than that of the shielding portion 41, the black matrix 52 can be used to effectively shield the light passing through the color conversion portion 42, preventing the light passing through the color conversion portion 42 from being incident on the adjacent filter unit 51 and causing problems such as color deviation of the display panel 100.

[0256] It is understood that in other embodiments, the orthographic projection of the color conversion portion 42 on the adhesive layer 20 may overlap with the orthographic projection of the filter unit 51 on the adhesive layer 20. In still other embodiments, the orthographic projection of the color conversion portion 42 on the adhesive layer 20 may partially overlap with the orthographic projection of the filter unit 51 on the adhesive layer 20. However, some embodiments of the present disclosure are not limited to this.

[0257] FIG. 24 is a cross-sectional view of a display panel according to yet other embodiments.

[0258] In some embodiments, as shown in FIG. 24 , the display panel 100 further includes a driving backplane 60. The driving backplane 60 is located on a side of the light-emitting unit 12 away from the buffer layer 11. The driving backplane is bonded to the plurality of light-emitting units 12 so that the driving backplane 60 drives the plurality of light-emitting units 12 to emit light, thereby enabling each sub-pixel region P0 within the display panel 100 to emit light.

[0259] Along the direction from the driving backplane 60 to the buffer layer 11, the light-emitting unit 12 includes: a first electrode 121, a first semiconductor layer 122 electrically connected to the first electrode 121, a light-generating layer 123, a second semiconductor layer 124, and a second electrode 125 electrically connected to the second semiconductor layer 124. The second electrode 125 is located on a side of the second semiconductor layer 124 close to the driving backplane 60.

[0260] When different voltages are applied to the first electrode 121 and the second electrode 125 respectively to form an electric field therebetween, a PN junction with a potential barrier can be formed between the first semiconductor layer 122 and the second semiconductor layer 124. The carriers in the first semiconductor layer 122 and the carriers in the second semiconductor layer 124 will enter the light generating layer 123 and recombine. At this time, the excess energy will be released in the form of light, thereby directly converting electrical energy into light energy to enable the light-emitting unit 12 to emit light.

[0261] In some examples, the first semiconductor layer 122 may be one of an N-type semiconductor and a P-type semiconductor, and the second semiconductor layer 124 may be the other of the N-type semiconductor and the P-type semiconductor.

[0262] In some examples, the material of the first semiconductor layer 122 and the second semiconductor layer 124 may be gallium nitride (GaN).

[0263] Taking the case where the first semiconductor layer 122 is a P-type semiconductor and the second semiconductor layer 124 is an N-type semiconductor as an example, the material of the first semiconductor layer 122 may be N-GaN, and the material of the second semiconductor layer 124 may be P-GaN.

[0264] In some examples, the first electrode 121 electrically connected to the first semiconductor layer 122 may be the anode of the light emitting unit 12. The material of the first electrode 121 may be chromium platinum gold or tin silver. However, some embodiments of the present disclosure are not limited thereto.

[0265] In some examples, the second electrode 125 electrically connected to the second semiconductor layer 124 may be a cathode of the light emitting unit 12. The material of the second electrode 125 may be chromium platinum gold or tin silver. However, some embodiments of the present disclosure are not limited thereto.

[0266] In some examples, the light generating layer 123 may be a multiple quantum well layer (MQW).

[0267] It should be noted that the structure of the light-emitting unit 12 in any embodiment herein can be the same as the structure of the light-emitting unit 21 shown in FIG. 24 , and thus the structure of the light-emitting unit in other embodiments can refer to the structure of the light-emitting unit 21 shown in FIG. 24 . However, some embodiments of the present disclosure are not limited to this. FIG. 24 only illustrates the light-emitting unit 12 in a flip-chip Mini LED structure. In other embodiments, the light-emitting unit 12 can also be configured as a face-up Mini LED structure or a vertical Mini LED structure.

[0268] In some examples, referring to FIG24 , the driving backplane 60 includes a base substrate 62 and a plurality of connecting electrodes 61 on the base substrate 62. The driving backplane 60 is electrically connected to the electrodes (first electrode 261 and second electrode 215) of the light emitting unit 12 via the connecting electrodes 61.

[0269] For example, the first electrode 221 in a light-emitting unit 12 is electrically connected to one of the multiple connecting electrodes 61, and the second electrode 224 in the light-emitting unit 12 is electrically connected to another connecting electrode among the multiple connecting electrodes 61, so that the light-emitting unit 12 is electrically connected to the driving backplane 60, so that the driving backplane 60 can be used to drive the light-emitting unit 12 to emit light.

[0270] In some examples, the substrate 62 may be a flexible substrate. For example, the substrate 62 may be made of an organic material. For example, the substrate 62 may be made of polyimide (PI), polycarbonate (PC), or polyvinyl chloride (PVC).

[0271] In other examples, the substrate 62 may be a rigid substrate, for example, a glass substrate or a PMMA (Polymethyl methacrylate) substrate.

[0272] In some embodiments, the driving backplane 60 further includes a driving circuit layer. The driving circuit layer may be located between the base substrate 62 and the connecting electrode 61. The driving circuit layer controls the connecting electrode 61 to send electrical signals to the first electrode 221 and the second electrode 225 in the light-emitting unit 12 to drive the light-emitting unit 12 to emit light.

[0273] 24 , the display panel 100 further includes a cover plate 00, which is located on a side of the color filter layer 50 away from the adhesive layer 20. The cover plate 00 can be used to protect the underlying film layer of the cover plate 00 from being scratched.

[0274] In some examples, the material of the cover plate 00 may include at least one of transparent polyimide and ultra-thin glass. However, some embodiments of the present disclosure are not limited thereto.

[0275] In some embodiments, the display panel 100 further includes an encapsulation layer, which is located on the side of the optical conversion layer 40 away from the color filter layer 50. The encapsulation layer can be used to prevent water and oxygen from corroding the optical conversion layer 40 and the color filter layer 50, which can help extend the life of the display panel 100.

[0276] 25 is a flow chart of a method for manufacturing a display panel according to some embodiments, FIG26 is a structural diagram corresponding to some steps in FIG25 , and FIG27 is a structural diagram corresponding to other steps in FIG25 .

[0277] Referring to Figures 25 to 27 , some embodiments of the present disclosure provide a method for manufacturing a display panel 100 . The structure of the display panel 100 can be referred to as shown in Figure 12 . The display panel 100 includes a plurality of pixel regions P, each of which includes a plurality of sub-pixel regions P0. The sub-pixel regions P0 include an opening region K. Light within the display panel 100 can be emitted from the display panel 100 through the opening region K, allowing each sub-pixel region P0 to emit light, thereby enabling the display panel 100 to display an image.

[0278] In some examples, the plurality of sub-pixel regions P0 may include sub-pixel regions P0 with different luminous colors.

[0279] For example, the plurality of sub-pixel regions P0 may be divided into a first sub-pixel region P1, a second sub-pixel region P2, and a third sub-pixel region P3. The first sub-pixel region P1, the second sub-pixel region P2, and the third sub-pixel region P3 each emit three primary colors of light. For example, the first sub-pixel region P1 may emit red light, the second sub-pixel region P2 may emit green light, and the third sub-pixel region P3 may emit blue light.

[0280] The manufacturing method of the display panel 100 includes:

[0281] Please refer to step S1 in FIG. 26 , S1 : providing a sapphire substrate G, and forming a buffer layer 11 on the sapphire substrate G.

[0282] In some examples, the buffer layer 11 may be made of gallium nitride (GaN). However, some embodiments of the present disclosure are not limited thereto.

[0283] Please refer to step S2 in Figure 26, S2: forming a plurality of light-emitting units 12 on a side of the buffer layer 11 away from the sapphire substrate G to form an optical device layer 10. One light-emitting unit 12 is located in one sub-pixel region P0.

[0284] Please refer to step S3 in Figure 26, S3: provide a transfer substrate R, bond the light-emitting unit 12 in the optical device layer 10 to the transfer substrate R, and remove the sapphire base G.

[0285] Please refer to step S4 in FIG. 27 : S4 : forming a light adjustment layer 30 on a side of the buffer layer 11 away from the light emitting unit 12 .

[0286] In step S3, after removing the sapphire substrate G, the buffer layer 11 in the optical device layer 10 is exposed. Based on this, in step S4, a light adjustment layer 30 can be formed on the side of the buffer layer 11 away from the light emitting unit 12.

[0287] Please refer to step S5 in FIG. 27 : S5 : providing an adhesive layer 20 , and bonding the adhesive layer 20 to a side of the light adjustment layer 30 away from the buffer layer 11 .

[0288] In step S5, the display panel 100 further includes other layers. An adhesive layer 20 is required to fix the optical device layer 10 (light adjustment layer 30) and other layers in the display panel 100. For example, the other functional layers in the display panel 100 may be optical conversion layers, etc.

[0289] In some examples, referring to step S5 in FIG. 27 , in step S5 , after the light adjustment layer 30 is provided and fixed to other film layers in the display panel 100 using the adhesive layer 20 , the transfer substrate R may be removed.

[0290] In some examples, the adhesive layer 20 may be a bonding adhesive layer. For example, the adhesive layer 20 may be benzocyclobutene (BCB). In this case, the refractive index of the adhesive layer 20 is approximately 1.56. However, some embodiments of the present disclosure are not limited thereto.

[0291] However, generally, after forming the optical device layer 10, the optical device layer 10 needs to be laser cut to form a plurality of independent optical devices E. Subsequently, the cut independent optical devices E are transported to the display panel 100. However, the buffer layer 11 may be cut during the cutting process of the optical device layer 10, resulting in a rough surface on the side surface 113 of the buffer layer 11.

[0292] In some examples, when the optical device layer 10 is laser cut, one light emitting unit 12 and its corresponding buffer layer 11 may be cut so that one light emitting unit 12 and its corresponding buffer layer 11 constitute one light emitting device E.

[0293] In other examples, when the optical device layer 10 is laser cut, three light-emitting units 12 and their corresponding buffer layers 11 may be cut so that the three light-emitting units 12 and their corresponding buffer layers 11 can constitute a light-emitting device E. In this case, one light-emitting unit 12 is located in one sub-pixel region P0, so that one light-emitting device E can be located in one pixel region P.

[0294] FIG27 illustrates three light-emitting units 12 in the optical device layer 10 as an example. When the optical device layer 10 is laser cut, the three light-emitting units 12 and their corresponding buffer layer 11 are cut. The structure of the resulting independent light-emitting device E can be seen in S5 of FIG27 . The side surface 113 is the cut surface of the buffer layer 11, resulting in a rough surface on the side surface 113 of the buffer layer 11.

[0295] However, the inventors of the present disclosure have discovered through research that when the light adjustment layer 30 is not provided, the buffer layer 11 is located between the light emitting unit 12 and the adhesive layer 20, and the refractive index of the adhesive layer 20 is lower than the refractive index of the buffer layer 11. Based on this, the light emitted by the light emitting unit 12 will be incident on the adhesive layer 20 through the buffer layer 11. However, since the refractive index of the buffer layer 11 is higher than the refractive index of the adhesive layer 20, when the light in the buffer layer 11 is incident on the adhesive layer 20, it is the light entering the medium with a higher refractive index from the medium with a lower refractive index, which will cause the light to be easily totally reflected at the interface between the buffer layer 11 and the adhesive layer 20 and unable to enter the adhesive layer. In other words, the buffer layer 11 will cause the light emitted by the light emitting unit 12 to be unable to continue to be emitted from the opening area K in each sub-pixel area P0 of the display panel 100, affecting the brightness of each sub-pixel area P0 of the display panel 100, and further resulting in a reduction in the quality of the display image of the display panel 100.

[0296] In addition, since the buffer layer 11 is cut during the cutting process of the optical device layer 10, the surface of the side surface 113 of the buffer layer 11 will become rough. As a result, the light that is fully emitted from the buffer layer 11 will continue to be fully emitted until it enters the side surface 113 of the buffer layer 11 and exits the buffer layer 11. Since this part of the light is not only emitted without passing through the opening area K, but also emitted through the side surface 113 of the buffer layer 11, it will cause this part of the light to be emitted at the edge V of the optical device E (as shown in Figure 3). This problem will not only affect the brightness of the light-emitting unit 12 in the optical device E, but also cause light leakage at the edge V of the optical device E, affecting the quality of the display image of the display panel 100.

[0297] Based on this, the manufacturing method of the display panel provided by some embodiments of the present disclosure includes step S4, forming a light adjustment layer 30 on the side of the buffer layer 11 away from the light emitting unit 12. And in step S4, the formed light adjustment layer 30 is configured so that when the light emitted by the plurality of light emitting units 12 irradiates the buffer layer 11, at least part of the refraction angle is greater than or equal to The light is incident on the adhesive layer 20 through the light adjustment layer 30. Wherein, n1 is the refractive index of the buffer layer, and n2 is the refractive index of the adhesive layer.

[0298] Step S4 is added to the display panel 100. After the light adjustment layer 30 is formed, the light adjustment layer 30 can be used to make at least part of the refraction angle γ greater than or equal to That is, at least part of the light that would have been totally reflected in the buffer layer 11 can be incident on the adhesive layer 20 through the light adjustment layer 30, which can improve the light leakage problem of the display panel 100 to a certain extent and improve the display image quality of the display panel 100.

[0299] In addition, when the light emitted by the plurality of light emitting units 12 irradiates the buffer layer 11, the refraction angle γ is less than or equal to The light can be incident at an angle ζ less than the critical angle when the light is incident on the light adjustment layer 30. Therefore, this part of the light will not be totally reflected at the interface between the buffer layer 11 and the light adjustment layer 30 , and thus this part of the light can also enter the adhesive layer 20 .

[0300] Based on this, when the light emitted by the plurality of light emitting units 12 irradiates the buffer layer 11, the refraction angle γ is less than or equal to and, at least part of the refracted light has an angle greater than or equal to All the light can continue to enter the adhesive layer 20 and then continue to be emitted from the display panel 100 along the opening area K, so as to realize the image display of the display panel 100.

[0301] In summary, the display panel 100 provided in some embodiments of the present disclosure may be provided with a light adjustment layer 30 on the side of the buffer layer 11 close to the adhesive layer 20. The light adjustment layer 30 not only does not affect the light that would not have been totally reflected in the buffer layer 11, allowing it to continue to enter the adhesive layer 20, but also allows at least part of the light that would have been totally reflected in the buffer layer 11 to enter the adhesive layer 20, that is, it can reduce the light that is totally reflected in the buffer layer 11 and emitted from the side 113 of the buffer layer 11. This can further help improve the brightness of each sub-pixel region P0 in the display panel 100, and can also prevent the problem of light leakage in each pixel region P (light-emitting device E) in the display panel 100, thereby improving the display image quality of the display panel 100.

[0302] In some embodiments, please continue to refer to FIG. 27 . In step S4 , the light adjustment layer 30 may be patterned to form a plurality of light adjustment portions 30A in the light adjustment layer 30 , and the light adjustment portions 30A at least partially overlap with the opening area K.

[0303] Since one light emitting unit 12 is located in the opening area K in one sub-pixel area P0, the light emitted by the light emitting unit 12 is emitted along the opening area K, so that the sub-pixel area P0 emits light. Based on this, the light adjustment layer 30 is patterned into a plurality of light adjustment parts 30A, and the light adjustment parts 30A are arranged to at least partially overlap with the opening area K, so that the light adjustment parts 30A overlapping with the opening area K can make at least part of the refraction angle γ of the light emitted by the light emitting unit 12 greater than or equal to The light emitted by the light emitting unit 12 is incident on the adhesive layer 20. This improves the problem of total reflection of the light emitted by the light emitting unit 12 at the interface between the buffer layer 11 and the rough portion, and further enables the light emitted by the light emitting unit 12 to be emitted from the display panel 100 along the opening area K, thereby ensuring the display quality of the display panel 100.

[0304] Several situations in which the light adjustment portion 30A at least partially overlaps with the opening area K have been described in detail above and will not be repeated here.

[0305] FIG28 is another structural diagram corresponding to step S4 in FIG25 .

[0306] In some embodiments, referring to FIG. 28 , in step S4 , a light adjustment layer 30 is formed on a side of the buffer layer 11 away from the light emitting unit 12 , including:

[0307] A rough layer 31 having a plurality of scattering particles 31A is formed on a side of the buffer layer 11 away from the light emitting unit 12 to form the light adjustment layer 30 .

[0308] In some examples, forming rough layer 31 includes:

[0309] The base material 31B is formed on the side of the buffer layer 11 away from the light emitting unit 12 .

[0310] In some examples, the material of the substrate 31B can be a high-transmittance material. For example, the material of the substrate 31B can be at least one of polymethyl methacrylate (PMMA), polystyrene (PS), or polycarbonate (PC).

[0311] A plurality of scattering particles 31A are added to a base material 31B to form a rough layer 31 , and the light adjustment layer 30 is formed using the rough layer 31 .

[0312] In some examples, the material of the scattering particles 31A may be an organic material. For example, the material of the scattering particles 31A may be at least one of acrylic, silicone, or polyethylene. For example, the material of the scattering particles 31A may be acrylic or silicone.

[0313] In other examples, the material of the scattering particles 31A may be an inorganic material. For example, the material of the scattering particles 31A may be at least one of nano-barium sulfate, silicon dioxide, or calcium carbonate.

[0314] Based on this, the multiple scattering particles 31A in the rough layer 31 can be used to effectively improve the problem of full emission of light emitted by the light-emitting unit 12 at the interface between the buffer layer 11 and the light adjustment layer 30 (rough layer 31), which is beneficial to prevent light leakage in each pixel area P (light-emitting device E) in the display panel 100, thereby improving the display image quality of the display panel 100.

[0315] FIG29 is another structural diagram corresponding to step S4 in FIG25 .

[0316] In some embodiments, as shown in FIG. 29 , in step S4, forming the light adjustment layer 30 on the side of the buffer layer 11 away from the light-emitting unit 12 includes roughening the first surface 111 of the buffer layer 11 away from the light-emitting unit 12 to form a plurality of rough areas 111A on the first surface 111, and reusing the first surface 111 at the plurality of rough areas 111A as a rough layer 31, thereby forming the light adjustment layer 30 using the rough layer 31. The first surface 111 at one rough area 111A is reused as one light adjustment portion 30A.

[0317] After the first surface 111 of the buffer layer 11 away from the light-emitting unit 12 is exposed in step S3. In step S4, the first surface 111 of the buffer layer 11 can be roughened to form a plurality of rough areas 111A on the first surface 111. The first surface 111 at the plurality of rough areas 111A is reused as the rough layer 31. The plurality of rough areas 111A formed on the first surface 111 can be used to scatter a large amount or even all of the light that would have been totally reflected in the buffer layer 11 and enter the adhesive layer 20, that is, the light that is totally reflected in the buffer layer 11 and emitted from the side 113 of the buffer layer 11 can be reduced. This can further help to improve the brightness of each sub-pixel area P0 in the display panel 100, and can also prevent the problem of light leakage in each pixel area P (light-emitting device E) in the display panel 100, so as to improve the display image quality of the display panel 100.

[0318] In addition, since the first surface 111 at multiple rough areas 111A is reused as the rough layer 31, after the buffer layer 11 including the first surface 111 on the side close to the adhesive layer 20 is roughened, there is no need to add an independent rough layer 31 in the display panel 100, which is not only beneficial to saving resources, but also beneficial to making the display panel 100 lighter and thinner.

[0319] It should be noted that FIG. 29 only uses a plurality of elliptical patterns to represent the rough area 111A, but does not represent the roughness of the rough area 111A or the structure of the rough area 111A.

[0320] In some embodiments, the roughening treatment performed on the first surface 111 of the buffer layer 11 may include wet roughening. That is, in step S4, a plurality of rough areas 111A are formed on the first surface 111 of the buffer layer 11 by wet roughening.

[0321] In some examples, in step S4 , the first surface 111 of the buffer layer 11 may be etched with an acid or a base to form a plurality of rough areas 111A on the first surface 111 of the buffer layer 11 .

[0322] For example, in step S4 , the first surface 111 of the buffer layer 11 may be etched using hot phosphoric acid (H 3 PO 4 ) and hot potassium hydroxide (KOH) to form a plurality of rough areas 111A on the first surface 111 of the buffer layer 11 .

[0323] In some other embodiments, the roughening treatment performed on the first surface 111 of the buffer layer 11 may include dry roughening. In step S4, a plurality of rough areas 111A are formed on the first surface 111 of the buffer layer 11 by dry roughening.

[0324] For example, in step S4 , a physical means such as grinding may be used to roughen the first surface 111 of the buffer layer 11 according to a certain pattern, so as to form a plurality of rough areas 111A on the first surface 111 of the buffer layer 11 .

[0325] In some examples, referring to FIG. 29 , the roughness of the first surface 111 at the rough area 111A may be set to be approximately in the range of 10 nm to 100 nm.

[0326] When the roughness of the first surface 111 at the rough region 111A is equal to or close to 10 nm, the roughness of the first surface 111 at the rough region 111A is relatively low, which can facilitate simplifying the roughening process of the buffer layer 11, including the first surface 111 on the side close to the adhesive layer 20. Furthermore, the first surface 111 at the rough region 111A can also meet the requirement of disrupting total internal reflection and causing light to scatter. When the roughness of the first surface 111 at the rough region 111A is equal to or close to 100 nm, the roughness of the first surface 111 at the rough region 111A is relatively high, which can more effectively disrupt total internal reflection of light at the rough region 111A and cause light to scatter. Furthermore, the precision requirement of the existing roughening process for the first surface 111 can also be met.

[0327] FIG30 is another structural diagram corresponding to step S4 in FIG25 .

[0328] In some embodiments, referring to FIG. 30 , in step S4 , a light adjustment layer 30 is formed on a side of the buffer layer 11 away from the light emitting unit 12 , including forming a light focusing layer 32 on a side of the buffer layer 11 away from the light emitting unit 12 to form the light adjustment layer 30 .

[0329] When light emitted by the light-emitting unit 12 enters the interface between the buffer layer 11 and the light-regulating layer 30, it is equivalent to the light entering the interface between the buffer layer 11 and the light-collecting layer 32. The refractive index and structure of the light-collecting layer 32 can be adjusted to allow some light that would otherwise be totally reflected in the buffer layer 11 to enter the adhesive layer 20, thereby reducing the amount of light that is totally reflected in the buffer layer 11 and emitted from the side 113 of the buffer layer 11. This can further improve the brightness of each sub-pixel region P0 within the display panel 100 and prevent light leakage from each pixel region P (light-emitting device E) within the display panel 100, thereby improving the display image quality of the display panel 100.

[0330] In some examples, forming the light-collecting layer 32 includes forming a plurality of protrusions 321 on a side of the buffer layer 11 away from the light-emitting unit 12. The plurality of protrusions 321 constitute the light-collecting layer 32. At least one protrusion 321 constitutes a light-adjusting portion 30A. FIG30 illustrates an example in which four protrusions 321 constitute a light-adjusting portion 30A.

[0331] In some examples, a photolithography or nanoimprinting process may be used to form a plurality of protrusions 321 on a side of the buffer layer 11 away from the light emitting unit 12, and the plurality of protrusions 321 constitute the light focusing layer 32. However, some embodiments of the present disclosure are not limited thereto.

[0332] In some examples, the cross section of the protrusion 321 may be semicircular or triangular, but some embodiments of the present disclosure are not limited thereto, and the protrusion 321 may be a structure protruding toward the adhesive layer 20 .

[0333] Among them, when the cross section of the protrusion 321 is triangular, the definition of the structure of the protrusion 321 and the definition of the refractive index of the light-collecting layer 32 are consistent with the above description of the light-collecting layer 32 in the display panel 100, and are not repeated here.

[0334] FIG31 is another structural diagram corresponding to step S4 in FIG25 .

[0335] In some embodiments, referring to FIG. 31 , in step S4 , a light adjustment layer 30 is formed on a side of the buffer layer 11 away from the light emitting unit 12 , including:

[0336] A rough layer 31 is formed on a side of the buffer layer 11 away from the light emitting unit 12 .

[0337] A light-collecting layer 32 is formed on a side of the rough layer 31 away from the plurality of light-emitting units 12 to form a light-adjusting layer 30 .

[0338] When the rough layer 31 is used to scatter the light emitted by the light-emitting unit 12 to destroy the total reflection of the light at the interface between the buffer layer 11 and the rough portion in the opening area K, part of the light may be scattered through the rough layer 31 to the opening area K of the adjacent sub-pixel area P0, which may easily lead to problems such as cross-color and color deviation.

[0339] Based on the above embodiments, it can be seen that the light-gathering layer 32 can converge light to a certain extent. Furthermore, a light-gathering layer 32 can be provided on the side of the rough layer 31 away from the buffer layer 11. This light-gathering layer 32 not only allows light to enter the adhesive layer 20 but also converges light scattered by the rough layer 31 to a certain extent, thereby preventing light from the light-emitting unit 12 from entering the opening area K of the adjacent sub-pixel region P0, causing problems such as color shift.

[0340] It should be noted that the rough layer 31 described in any of the above embodiments can be combined with the light-collecting layer 32 described in any of the above embodiments to solve the problems of light leakage and color shift of the display panel 100 .

[0341] FIG32 is a structural diagram of some steps in a method for manufacturing a display panel according to some embodiments.

[0342] In some embodiments, referring to FIG. 20 or FIG. 21 , the sub-pixel region P0 in the display panel 100 further includes a non-opening region F surrounding the opening region K. The display panel 100 further includes a light shielding portion 322 . Based on this, in the method for manufacturing the display panel, before forming the light adjustment layer 30 in step S4 and after step S3 , the following steps are included:

[0343] S31: forming a light shielding portion 322 on a side of the buffer layer 11 away from the light emitting unit 12 , wherein the light shielding portion 322 includes a plurality of hollow regions L. The light shielding portion 322 may at least partially overlap with the non-opening region F.

[0344] In step S4 after step S31 , a plurality of light adjustment parts 30A of the light adjustment layer 30 are formed on the buffer layer 11 in the hollow area L to form the light adjustment layer 30 .

[0345] Based on this, the light shielding portion 322 can be used to isolate the multiple light adjustment portions 30A, and the light adjustment portion 30A at least partially overlaps with the opening area K. The light shielding portion 322 can be used to prevent light from the light emitting unit 12 from entering the opening area K of the adjacent sub-pixel area P0, causing problems such as color shift.

[0346] In other embodiments, the surface of the shading portion 322 close to the light adjustment portion 30A can be set to fit with the surface of the light adjustment portion 30A close to the shading portion 322. That is, the surface of the shading portion 322 close to the light adjustment portion 30A covers the surface of the light adjustment portion 30A close to the shading portion 322. This can prevent light from passing through the edge of the light adjustment portion 30A into the opening area K of the adjacent sub-pixel area P0, causing problems such as color deviation.

[0347] The structures of the light adjustment part 30A and the light adjustment layer 30 may be those described in any of the above embodiments. FIG32 only illustrates the example of the light adjustment layer 30 being the light focusing layer 32 and the light adjustment part 30A being the light focusing part.

[0348] In some embodiments, in step S5, after removing the transfer substrate R, step S6 may also be included: a driving backplane may be provided, and the light-emitting units 12 in the optical device layer 10 are bonded to the driving backplane, so as to utilize the driving backplane to drive each light-emitting unit 12 in the optical device layer 10, so that each sub-pixel area P0 in the display panel 100 emits light to realize picture display.

[0349] In some embodiments, the method for manufacturing the display panel 100 may further include the following steps after step S4 and before step S5:

[0350] S41: Providing a glass substrate and forming an optical conversion layer on the glass substrate. In some examples, the glass substrate can be reused as a glass cover plate for the display panel 100. The glass substrate can serve as a substrate, providing support for forming the optical conversion layer on the glass substrate. Furthermore, after the display panel 100 is manufactured, the glass substrate can be reused as a glass cover plate 00 for the display panel 100, protecting the display panel 100 from scratches on its internal film layers.

[0351] Based on this, in step S5, an adhesive layer 20 is provided and arranged between the light adjustment layer 30 and the optical conversion layer to fix the light adjustment layer 30 and the optical conversion layer, that is, the optical device layer 10 and the light conversion layer are relatively fixed, so that the optical conversion layer can be used to convert the same color of light emitted by multiple light-emitting units 12 in the optical device layer 10 into light of different colors, so that the display panel 100 can display the picture.

[0352] In summary, some embodiments of the present disclosure provide a display panel 100, a method for manufacturing the same, and a display device 200. The display device 200 includes the display panel 100. A light adjustment layer 30 is provided within the display panel 100. The light adjustment layer 30 is provided on the side of the buffer layer 11 within the display panel 100, adjacent to the adhesive layer 20. The light adjustment layer 30 not only does not affect light that would otherwise not be totally reflected within the buffer layer 11, allowing it to continue to enter the adhesive layer 20, but also allows at least some light that would otherwise be totally reflected within the buffer layer 11 to enter the adhesive layer 20. This reduces the amount of light that would otherwise be totally reflected within the buffer layer 11 and emitted from the side 113 of the buffer layer 11. This can further improve the brightness of each sub-pixel region P0 within the display panel 100 and prevent light leakage from each pixel region P (light-emitting device E) within the display panel 100, thereby improving the display quality of the display panel 100. Furthermore, because the display device 200 includes the display panel 100 according to any of the above embodiments, the display device 200 exhibits all of the aforementioned advantages.

[0353] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A display panel comprising a plurality of sub-pixel regions, wherein the sub-pixel regions include opening regions; The display panel further includes: An optical device layer, the optical device layer comprising a buffer layer and a plurality of light-emitting units, one light-emitting unit is located in the opening area in a sub-pixel area, and the buffer layer is located on light-emitting surfaces of the plurality of light-emitting units; an adhesive layer, located on a side of the buffer layer away from the light-emitting unit; the adhesive layer has a refractive index smaller than that of the buffer layer; and The light adjustment layer is located on the side of the buffer layer close to the bonding layer; the light adjustment layer is configured so that when the light emitted by the plurality of light emitting units irradiates the buffer layer, at least part of the refraction angle is greater than or equal to The light is incident on the bonding layer through the light adjustment layer; Wherein, n1 is the refractive index of the buffer layer, and n2 is the refractive index of the adhesive layer.

2. The display panel according to claim 1, wherein: The light adjustment layer includes a plurality of light adjustment parts, and the light adjustment parts at least partially overlap with the opening area.

3. The display panel according to claim 2, wherein: The light adjustment portion is located in the opening area.

4. The display panel according to any one of claims 1 to 3, wherein: The light adjustment layer includes a rough layer.

5. The display panel according to claim 4, wherein: The rough layer includes a plurality of scattering particles.

6. The display panel according to claim 4, wherein: The buffer layer includes a first surface close to the bonding layer; the first surface includes a plurality of rough areas; the plurality of rough areas are reused as the rough layer.

7. The display panel according to any one of claims 4 to 6, wherein: The roughness of the rough layer is in the range of about 10 nm to 100 nm.

8. The display panel according to any one of claims 1 to 7, wherein: The light adjustment layer includes a light focusing layer.

9. The display panel according to any one of claims 1 to 8, wherein: The light adjustment layer includes a rough layer and a light-gathering layer; the light-gathering layer is located on one side of the buffer layer of the rough layer.

10. The display panel according to claim 8 or 9, wherein: The refractive index of the light-condensing layer is greater than the refractive index of the adhesive layer, and the refractive index of the light-condensing layer is less than the refractive index of the buffer layer.

11. The display panel according to claim 10, wherein: The light-collecting layer includes at least one protrusion, the cross section of the protrusion is a triangle, and the base angle α of the protrusion satisfies: Wherein, n3 is the refractive index of the light-collecting layer.

12. The display panel according to claim 8 or 9, wherein: The refractive index of the light-collecting layer is greater than the refractive index of the buffer layer; The light-collecting layer includes at least one protrusion, the cross section of the protrusion is a triangle, and the base angle α of the protrusion satisfies: Wherein, n3 is the refractive index of the light-collecting layer. 13 . The display panel according to claim 2 , further comprising a light shielding portion, wherein the light shielding portion isolates the plurality of light adjusting portions.

14. The display panel according to any one of claims 1 to 13, further comprising an optical conversion layer, wherein the optical conversion layer is located on a side of the adhesive layer away from the light adjustment layer; The optical conversion layer includes a shielding portion and a plurality of color conversion portions, wherein the shielding portion separates the plurality of color conversion portions; an orthographic projection of the color conversion portion on the adhesive layer at least partially overlaps with an orthographic projection of the light emitting unit on the adhesive layer.

15. The display panel according to claim 14, wherein: The color conversion unit includes a first type of color conversion unit and a second type of color conversion unit; the first type of color conversion unit is configured to convert the light emitted by the light emitting unit into a target color; the second type of color conversion unit is configured to directly transmit the light emitted by the light emitting unit.

16. The display panel according to claim 14 or 15, further comprising a color filter layer, the color filter layer being located on a side of the optical conversion layer away from the bonding layer; the color filter layer comprising a plurality of filter units and a black matrix; the black matrix separating the plurality of filter units; The orthographic projection of the filter unit on the adhesive layer at least partially overlaps with the orthographic projection of the light emitting unit on the adhesive layer.

17. The display panel according to claim 16, wherein: The orthographic projection of the color conversion portion on the adhesive layer covers the orthographic projection of the filter unit on the adhesive layer.

18. A method for manufacturing a display panel, wherein: The display panel includes a plurality of sub-pixel regions, and the sub-pixel region includes an opening region; The production method comprises: Providing a sapphire substrate, and forming a buffer layer on the sapphire substrate; A plurality of light-emitting units are formed on a side of the buffer layer away from the sapphire substrate to form an optical device layer; wherein one light-emitting unit is located in one of the sub-pixel regions; Providing a transfer substrate, bonding the light-emitting unit in the optical device layer to the transfer substrate, and removing the sapphire base; forming a light adjustment layer on a side of the buffer layer away from the light emitting unit; Providing an adhesive layer, and bonding the adhesive layer to a side of the light adjustment layer away from the buffer layer; The light adjustment layer is configured such that when the light emitted by the plurality of light emitting units irradiates the buffer layer, at least part of the refraction angle is greater than or equal to The light is incident on the bonding layer through the light adjustment layer; wherein n1 is the refractive index of the buffer layer, and n2 is the refractive index of the bonding layer.

19. The method according to claim 18, wherein: A light adjustment layer is formed on a side of the buffer layer away from the light emitting unit; comprising: A rough layer having a plurality of scattering particles is formed on a side of the buffer layer away from the light emitting unit to form the light adjustment layer.

20. The method according to claim 18, wherein: A light adjustment layer is formed on a side of the buffer layer away from the light emitting unit; comprising: The first surface of the buffer layer away from the plurality of light-emitting units is roughened to form a plurality of rough areas on the first surface to be reused as a rough layer, and the light adjustment layer is formed by using the rough layer.

21. The method according to claim 18, wherein: A light adjustment layer is formed on a side of the buffer layer away from the light emitting unit; comprising: A light-collecting layer is formed on a side of the buffer layer away from the light-emitting unit to form a light-adjusting layer.

22. The production method according to any one of claims 18 to 20, wherein: A light adjustment layer is formed on a side of the buffer layer away from the light emitting unit; comprising: forming a rough layer on a side of the buffer layer away from the light emitting unit; A light-collecting layer is formed on a side of the rough layer away from the plurality of light-emitting units to form a light-adjusting layer.

23. A display device comprising the display panel according to any one of claims 1 to 17.

Images