A display panel and display device

Abstract

This application discloses a display panel and display device, relating to the field of display technology. It can reduce light leakage from the excitation light source, improve the light conversion efficiency of quantum dot emission, and thus improve the color gamut of the display screen. A display panel includes: an excitation light source; a quantum dot layer disposed on one side of the excitation light source; and a focusing layer disposed between the excitation light source and the quantum dot layer. The focusing layer includes multiple optical fiber structures, with one end of each optical fiber structure facing the excitation light source and the other end facing the quantum dot layer.

Description

Technical Field

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

[0002] Currently, with the continuous development of display technology, it is particularly important for displays to present natural colors to the greatest extent and bring people a more realistic and immersive visual experience. Among the methods of achieving a wide color gamut, quantum dots exhibit unique advantages due to their narrow emission spectrum and high color purity. Existing quantum dots in the display field are divided into two types: photoluminescence and electroluminescence. Photoluminescent quantum dots can achieve full-color display by exciting red and green quantum dots with a blue backlight. Among these, the design based on blue light excitation is considered the best choice for large-size displays because it can actively emit light and does not require the addition of polarizers.

[0003] However, existing photoluminescent quantum dot displays suffer from light leakage from the excitation source, resulting in low light conversion efficiency when the light source excites the quantum dots to emit light, which severely affects the improvement of the display's color gamut. Summary of the Invention

[0004] This application provides a display panel and display device that can reduce light leakage from the excitation light source, improve the light conversion efficiency of quantum dot emission, and thus improve the color gamut of the display screen.

[0005] A first aspect of this application provides a display panel, including:

[0006] Excitation light source;

[0007] A quantum dot layer is disposed on one side of the excitation light source;

[0008] A focusing layer is disposed between the excitation source and the quantum dot layer. The focusing layer includes multiple optical fiber structures, with one end of each optical fiber structure facing the excitation source and the other end facing the quantum dot layer.

[0009] In some embodiments, the optical fiber structure includes a cladding layer and a core layer, the cladding layer enclosing the core layer, and the refractive index of the cladding layer being greater than the refractive index of the core layer.

[0010] In some embodiments, the cladding includes a first cladding and a second cladding, wherein the second cladding is disposed between the first cladding and the core layer.

[0011] In some embodiments, the second cladding layer includes a plurality of first cladding tubes disposed around the core layer.

[0012] In some embodiments, the second cladding layer further includes at least one second cladding tube disposed between the core layer and the first cladding tube, or the second cladding tube is disposed between the first cladding layer and the first cladding tube.

[0013] In some embodiments, the outer diameter of the second cladding tube is smaller than the outer diameter of the first cladding tube; and / or,

[0014] The second cladding tube is disposed between two adjacent first cladding tubes.

[0015] In some embodiments, the outer surface of the first cladding tube is tangential to or in contact with the outer surface of the second cladding tube; and / or,

[0016] The outer surface of the first cladding tube is tangential to or in contact with the first cladding; and / or,

[0017] The outer surface of the second cladding tube is tangent to or in contact with the first cladding.

[0018] In some embodiments, the first cladding tube includes a first cladding and a first die, the first cladding encapsulating the first die, and the refractive index of the first die being less than the refractive index of the first cladding; and / or,

[0019] The second cladding tube includes a second cladding and a second core, wherein the second cladding encloses the second core, and the refractive index of the second core is less than the refractive index of the second cladding; and / or,

[0020] The material filling the space between the first cladding layer and the second cladding layer is the same as the material of the core layer.

[0021] In some embodiments, the first die is made of the same material as the core layer; and / or,

[0022] The first cladding layer is made of the same material as the first cladding layer; and / or,

[0023] The second core is made of the same material as the fiber core layer; and / or,

[0024] The second cladding layer is made of the same material as the first cladding layer.

[0025] In some embodiments, the target wavelength of the light source incident from one end of the optical fiber structure and exiting from the other end of the optical fiber structure satisfies the following formula:

[0026] λ=(2t ) / m,

[0027] Wherein, λ is the target wavelength, t is the thickness of the first cladding and / or the second cladding, n1 is the refractive index of the core layer, and m is the total number of the first cladding tubes and / or the second cladding tubes. The optical fiber structure is used to confine the light of the target wavelength to propagate inside the optical fiber structure.

[0028] And / or,

[0029] The refractive index of the core layer is in the range of 1.4 to 1.6, and / or the refractive index of the first cladding layer is in the range of 1.7 to 1.9, and / or the refractive index of the second cladding layer is in the range of 1.7 to 1.9.

[0030] In some embodiments, the display panel further includes:

[0031] A color filter film is disposed on the side of the quantum dot layer away from the excitation light source;

[0032] And / or,

[0033] The excitation light source includes a driving backplate and an excitation light layer, wherein the excitation light layer is disposed between the driving backplate and the quantum dot layer;

[0034] And / or,

[0035] The quantum dot layer comprises at least two types of quantum dot material layers, and different types of quantum dot material layers emit different colors of light when excited by the light emitted from the excitation light source.

[0036] In some embodiments, when the excitation light source includes a driving backplane and an excitation light layer, the plurality of optical fiber structures are arranged in an array; and / or,

[0037] The end face of the optical fiber structure is circular, elliptical, or polygonal; and / or,

[0038] The outer surfaces of adjacent optical fiber structures are tangential or abutted; or,

[0039] The orthographic projections of adjacent fiber structures on the drive backplane do not overlap.

[0040] In some embodiments, a transparent optical adhesive material is used to space adjacent optical fiber structures.

[0041] In some embodiments, the quantum dot layer includes a blank material layer and at least one quantum dot material layer. The blank material layer does not contain any quantum dot material and is used to transmit light emitted by the excitation light source. The quantum dot material layer contains quantum dot material and is used to emit light of a corresponding color when excited by the light emitted by the excitation light source. The light emitted by the quantum dot material layer is a different color from the light emitted by the excitation light source.

[0042] A second aspect of this application provides a display device, comprising:

[0043] The display panel as described in the first aspect.

[0044] The display panel provided in this application embodiment focuses and collimates the light emitted by the excitation light source by setting a light-concentrating layer. Specifically, the light-concentrating layer can be set with an optical fiber structure to concentrate most of the light within the optical fiber structure for transmission, reducing light leakage from the light source. This can increase the amount of light received by the quantum dot layer, thereby improving the light conversion efficiency of quantum dot emission, improving the color gamut of the display panel, and enhancing the display effect. Attached Figure Description

[0045] Figure 1 A schematic structural diagram of a display panel provided in an embodiment of this application;

[0046] Figure 2 A schematic structural diagram of an optical fiber structure provided in an embodiment of this application;

[0047] Figure 3 This is a schematic diagram of light propagation in an optical fiber structure provided in an embodiment of this application;

[0048] Figure 4 A schematic structural diagram of another optical fiber structure provided in the embodiments of this application;

[0049] Figure 5 A schematic structural diagram of another optical fiber structure provided in the embodiments of this application;

[0050] Figure 6 A schematic structural diagram of another display panel provided in an embodiment of this application;

[0051] Figure 7 A schematic structural diagram of another display panel provided in an embodiment of this application;

[0052] Figure 8 A schematic diagram of an optical fiber structure provided for an embodiment of the application;

[0053] Figure 9 This is a schematic structural diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0054] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0055] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0056] Currently, with the continuous development of display technology, it is particularly important for displays to present natural colors to the greatest extent and bring people a more realistic and immersive visual experience. Among the methods of achieving a wide color gamut, quantum dots exhibit unique advantages due to their narrow emission spectrum and high color purity. Existing quantum dots in the display field are divided into two types: photoluminescence and electroluminescence. Photoluminescent quantum dots can achieve full-color display by exciting red and green quantum dots with blue backlight. The design based on blue light excitation is considered the best choice for large-size displays because it can actively emit light without the need for polarizer fabrication. However, existing photoluminescent quantum dot displays suffer from light leakage from the excitation source and low light conversion efficiency when the light source excites the quantum dots, severely affecting the improvement of the display's color gamut.

[0057] In view of this, embodiments of this application provide a display panel and display device that can reduce light leakage from the excitation light source, improve the light conversion efficiency of quantum dot emission from the light source, and thereby improve the color gamut of the display screen.

[0058] A first aspect of this application provides a display panel. Figure 1 This is a schematic structural diagram of a display panel provided in an embodiment of this application. Figure 1As shown, the display panel provided in this application embodiment includes: an excitation light source 100, a quantum dot layer 200, and a light-concentrating layer 300; the quantum dot layer 200 is disposed on one side of the excitation light source 100; the light-concentrating layer 300 is disposed between the excitation light source 100 and the quantum dot layer 200, and the light-concentrating layer 300 includes a plurality of optical fiber structures 400, one end face of the optical fiber structure 400 facing the excitation light source 100, and the other end face facing the quantum dot layer 200. For example, the optical fiber structure 400 includes a first end 410 and a second end 420. Light emitted from the excitation source 100 can enter the optical fiber structure 400 from the first end 410 and exit from the second end 420. The light emitted from the optical fiber structure 400 can enter the quantum dot layer 200, which is doped with quantum dot material. The quantum dot material emits light under the excitation of the excitation source 100. Specifically, the quantum dots can undergo energy level transitions under light excitation, which can be accompanied by the generation of light energy. The emitted light can be used to display images. The light-concentrating layer 300 can concentrate the light emitted from the excitation source 100 within the optical fiber structure 400, that is, confine the light incident on the optical fiber structure 400 to propagate within the optical fiber structure 400, thereby concentrating the light and preventing the light emitted from the excitation source 100 from scattering in all directions, thus improving the light leakage of the light emitted from the excitation source 100.

[0059] It should be noted that the arrangement and number of optical fiber structures 400 within the light-concentrating layer 300 are merely illustrative and are not intended to limit the specific implementation of this application.

[0060] It should be noted that in existing photoluminescent quantum dot display panels, the light emitted by the light source is usually directly incident on the quantum dot layer. After the light source is emitted, it propagates in all directions, and the propagation path is very divergent, which easily causes light leakage. This will seriously affect the amount of light received by the quantum dot layer, resulting in a low light conversion efficiency for the light source to excite the quantum dots to emit light, and limiting the improvement of the color gamut.

[0061] To address the aforementioned issues, the display panel provided in this application embodiment uses a light-concentrating layer 300 to focus and collimate the light emitted by the excitation light source 100. Specifically, the light-concentrating layer 300 can be equipped with an optical fiber structure 400 to concentrate most of the light for transmission within the optical fiber structure 400, reducing light leakage from the light source. This increases the amount of light received by the quantum dot layer 200, thereby improving the light conversion efficiency of quantum dot emission, enhancing the color gamut of the display panel, and improving the display effect.

[0062] In some embodiments, the optical fiber structure 400 includes a cladding layer and a core layer, the cladding layer enclosing the core layer, and the refractive index of the cladding layer being greater than that of the core layer. The cladding layer includes a first cladding layer and a second cladding layer, the second cladding layer being disposed between the first cladding layer and the core layer. The second cladding layer includes a plurality of first cladding tubes, the plurality of first cladding tubes being disposed around the core layer. Each first cladding tube includes a first tube cladding and a first core, the first tube cladding layer enclosing the first core, and the refractive index of the first core being less than that of the first tube cladding layer.

[0063] For example, Figure 2 This is a schematic structural diagram of an optical fiber structure provided in an embodiment of this application. Figure 2 As shown, the optical fiber structure 400 includes a cladding layer and a core layer 440. The cladding layer includes a first cladding layer 431 and a second cladding layer. The second cladding layer is disposed between the first cladding layer 431 and the core layer 440. The second cladding layer includes a first cladding tube 432. The first cladding tube 432 includes a first tube cladding layer 401 and a first tube core 402. The first tube cladding layer 401 wraps around the first tube core 402. The refractive index of the first tube core 402 is less than the refractive index of the first tube cladding layer 401.

[0064] It should be noted that, Figure 2 The number and arrangement of the first cladding tubes 432 shown are merely illustrative and are not intended to limit the scope of this application.

[0065] For example, the outer surface of the first cladding tube 432 may be tangential or abutting the first cladding 431. When the first cladding tube 432 is a circular or elliptical tube, the outer surfaces of adjacent first cladding tubes 432 may be tangential. Similarly, when the end face of the optical fiber structure 400 is circular or elliptical, the outer surface of the first cladding tube 432 may be tangential to the inner surface of the first cladding 431. When the first cladding tube 432 is a polygonal tube, the outer surfaces of adjacent first cladding tubes 432 may have contact area.

[0066] For example, some or all of the multiple first cladding tubes 432 can be separated from each other, i.e., in a non-contact configuration; the outer surface of the first cladding tube 432 and the inner surface of the first cladding 431 can also be separated from each other, and can be set according to specific optical requirements.

[0067] In some embodiments, the material filling the space between the first cladding layer 431 and the second cladding layer is the same as the material of the core layer. For example, see reference... Figure 2 In the event that there is a gap between the first cladding layer 431 and the first cladding tube 432 of the second cladding layer, the gap can be filled with the same material as the core layer 440.

[0068] In some embodiments, the first core 402 may be made of the same material as the core layer 440, and the first sheath 401 may be made of the same material as the first sheath 431.

[0069] For example, the refractive index of the core layer 440 can be in the range of 1.4 to 1.6, the refractive index of the first cladding layer 401 can be in the range of 1.7 to 1.9, and the refractive index of the first cladding layer 431 can be in the range of 1.7 to 1.9. The refractive index of the material of the core layer 440 can be n1, and the refractive indices of the first cladding layer 431 and the first cladding layer 401 can be n2.

[0070] For example, the optical fiber structure 400 includes a low-refractive-index core layer 440 and a high-refractive-index cladding. The high-refractive-index cladding includes a first cladding 431 and a second cladding. The second cladding includes a plurality of first cladding tubes 432. The first core 402 of the first cladding tube 432 can be made of the same material as the core layer 440. In the first cladding tube 432, the refractive index of the first core 402 is less than that of the first cladding 401. Adjacent first cladding tubes 432 are in contact with each other, either tangentially or connected, forming a nodeed anti-resonant microstructure. The light guiding principle of the anti-resonant microstructure can be explained using the ARROW (anti-resonant reflection) principle in planar waveguides. When light is transmitted to the interface between the core layer 440 and the cladding, light that meets the resonance condition is directly transmitted through the cladding, while light that does not meet the resonance condition is reflected back to the core layer 440 for propagation. That is, by enhancing the reflection of incident light when it encounters the thin cladding wall, the light can be confined as much as possible within the fiber core layer, thus avoiding multi-directional scattering of light.

[0071] For example, Figure 3 This is a schematic diagram of light propagation in an optical fiber structure provided as an embodiment of this application. (Combined with...) Figure 2 and Figure 3 The materials of the first cladding layer 431 and the first tube cladding layer 401 can be quartz glass. The structure formed by the high-refractive-index quartz vein region on the inner wall of the cladding layer can be regarded as an FP (Fabry-Perot) resonant cavity, that is, a resonant cavity can be formed at the junction of n1 and n2. The inner wall of the cladding layer can be the inner wall of the first cladding layer 431, the inner wall of the first tube cladding layer, and the outer wall. In the resonant state, the FP cavity can be regarded as transparent, and light can leak out from the cladding layer; while in the anti-resonant state, the reflection coefficient of the FP cavity is very high, which can confine the light to propagate within the fiber core layer. A schematic diagram of the light emission principle in the anti-resonant state can be found in [reference needed]. Figure 3Light enters from the first end 410 of the fiber structure 400, propagating from n1 of the core layer 440 to n2 of the first cladding 401, then back to n1 of the first core 402, and finally back to n2 of the first cladding 401, returning to n1 of the core layer 440. The refractive index path of the light is n1-n2-n1-n2-n1. Alternatively, the light can propagate from n1 of the first core 402 to n2 of the first cladding 401, then back to n1 of the core layer 440, continuing towards the first cladding 431, and being reflected back to n1 of the core layer 440. The refractive index path of this propagation is n1-n2-n1-n2-n1. The resonance condition is typically determined by the wavelength, the refractive indices of the cladding and core layers, and the wall thickness of the cladding tube. Therefore, the optical fiber structure 400 provided in this application embodiment is based on the anti-resonance mechanism. Its light guiding mechanism can be explained as treating the high refractive index layer in the optical fiber as a FP resonant cavity. When the light wavelength meets the resonance condition of this FP cavity, the high refractive index layer will resonate. When the light wavelength is far from the resonant wavelength, the light will be reflected back by the FP cavity and thus confined in the low refractive index layer and propagate forward along its axis.

[0072] For example, the anti-resonance window of an optical fiber structure needs to satisfy:

[0073] The target wavelength of light rays incident from one end of an optical fiber structure and exiting from the other end of the optical fiber structure satisfies the following formula:

[0074] λ=(2t ) / m,

[0075] Where λ is the target wavelength, t is the thickness of the first cladding or the first cladding layer, n1 is the refractive index of the core layer, and m is the total number of the first cladding tubes. The fiber structure is used to confine the light of the target wavelength within the fiber structure; m can be understood as corresponding to the resonant number of the waveguide.

[0076] It should be noted that light of the target wavelength that meets the above formula conditions will be confined to the inside of the fiber structure after entering it; that is, it enters from one end and exits from the other, and will not exit from the sidewalls of the fiber structure. This serves to focus and collimate the light. Additionally, refer to... Figure 3 Other light rays besides the target wavelength can be represented as λ0. The intensity of the propagation of other wavelengths of λ0 in the fiber structure is not significantly different in each structural layer. The propagation of the target wavelength λ in the fiber structure is mainly concentrated in the core layer.

[0077] It should be noted that when the target wavelength λ satisfies the anti-resonance condition, the light with the target wavelength λ will undergo total internal reflection at the interface between refractive indices n1 and n2. Therefore, the light propagating from the core layer 440 will undergo total internal reflection at the outer surface of the first cladding layer 401, and the light will continue to propagate within the core layer 440. Similarly, the light propagating from the first die 402 will undergo total internal reflection at the inner surface of the first cladding layer 401, and the light will continue to propagate within the first die 402.

[0078] For example, the tangential or contacting relationship between the outer surfaces of each first cladding tube 432 can form a tube layer among the multiple first cladding tubes 432. The first tube cladding 401 of the multiple first cladding tubes 432 forms a continuous cladding, which can better confine the light of the target wavelength within the fiber core layer 440 for propagation, preventing it from leaking out to the outside, reducing light leakage from the excitation source, and also achieving a collimation effect, thereby improving the light conversion utilization rate.

[0079] In some embodiments, the second cladding further includes at least one second cladding tube disposed between the core layer and the first cladding tube. The outer diameter of the second cladding tube is smaller than the outer diameter of the first cladding tube; the second cladding tube is disposed between two adjacent first cladding tubes. The outer surface of the first cladding tube is tangential to or in contact with the outer surface of the second cladding tube. The second cladding tube includes a second cladding and a second core, the second cladding encapsulating the second core, and the refractive index of the second core being smaller than the refractive index of the second cladding. The second core is made of the same material as the core layer; the second cladding is made of the same material as the first cladding.

[0080] For example, Figure 4 This is a schematic structural diagram of another optical fiber structure provided in an embodiment of this application. (See diagram below.) Figure 4 As shown, the second cladding also includes multiple second cladding tubes 433, which are disposed between the core layer 440 and the first cladding tube 432. Each second cladding tube 433 includes a second cladding layer 403 and a second core 404. The material of the second cladding layer 403 can be the same as that of the first cladding layer, or it can be the same as that of the first cladding layer 401. The material of the second core 404 can be the same as that of the core layer 440, or it can be the same as that of the first core 402. The refractive index of the second core 404 is less than that of the second cladding layer 403. The outer diameter of the second cladding tube 433 can be smaller than that of the first cladding tube 432. When the wavelength of the light entering the fiber structure 400 is the target wavelength, i.e., when the wavelength of the light entering the fiber structure 400 meets the anti-resonance condition, the incident light will be confined within the first core 402, the second core 404, and the core layer 440 for propagation.

[0081] The display panel provided in this embodiment of the application includes a second cladding tube 433 in the fiber optic structure 400. The second cladding tube 433 enables the second cladding to have two layers of cladding tubes. More cladding tubes can achieve better light confinement and collimation. In addition, during the fabrication of the fiber optic structure 400, the outer diameter of the second cladding tube 433 is small, which can fix the first cladding tube 432 and prevent the first cladding tube 432 from shifting during the stretching of the fiber optic structure 400.

[0082] In some implementations... Figure 5 This is a schematic structural diagram of yet another optical fiber structure provided in an embodiment of this application. For example... Figure 5 As shown, a second cladding tube 433 is disposed between the first cladding layer 431 and the first cladding tube 432. The outer surface of the second cladding tube 433 is tangent to or in contact with the first cladding tube 432, and the outer surface of the second cladding tube 433 can also be tangent to or in contact with the first cladding layer 431. Figure 5 The fiber structure 400 shown is provided with two second cladding tubes 433, and includes a total of three cladding tubes, which can have better light confinement and collimation. In addition, during the fabrication process, the two second cladding tubes 433 on both sides can limit the first cladding tube 432, and better prevent the first cladding tube 432 from shifting.

[0083] For example, the thickness of the second cladding 403, the refractive index of the second core 404, and the refractive index of the second cladding 403 of the second cladding tube 433 can all satisfy the anti-resonance condition of the target wavelength. That is, they satisfy the following formula:

[0084] λ=(2t ) / m,

[0085] Where λ is the target wavelength, t is the thickness of the second cladding layer, n1 is the refractive index of the core layer, m is the total number of the first and second cladding tubes, and the light of the target wavelength can propagate within the second core 404.

[0086] In some embodiments, the display panel may further include a color filter film disposed on the side of the quantum dot layer 200 away from the excitation light source 100. The excitation light source 100 includes a driving backplate and an excitation light layer disposed between the driving backplate and the quantum dot layer 200. The quantum dot layer 200 includes at least two types of quantum dot material layers, which emit different colors of light when excited by light emitted from the excitation light source. The quantum dot layer may also include a blank material layer, which does not contain any quantum dot material and is used to transmit light emitted from the excitation light source. The light emitted by the quantum dot material layer is a different color than the light emitted by the excitation light source.

[0087] For example, Figure 6This is a schematic structural diagram of another display panel provided in an embodiment of this application. Figure 6 As shown, the quantum dot layer 200 may include a red quantum dot material layer R, a green quantum dot material layer G, and a blank material layer W. The red quantum dot material layer R is doped with red quantum dot material and can emit red light when excited by blue light. The green quantum dot material layer G is doped with green quantum dot material and can emit green light when excited by blue light. The blank material layer W does not contain any quantum dot material and can directly transmit the light from the excitation light source 100. Therefore, when the light emitted by the excitation light source 100 is blue light, the blank material layer W can transmit blue light. Thus, the light emitted from the quantum dot layer 200 may include red light, green light, and blue light, which can form three primary colors to achieve the display of a color image.

[0088] For example, such as Figure 6 As shown, the color filter film 600 corresponding to the quantum dot layer 200 may include a red filter film r, a green filter film g, and a blue filter film b. The color filter film 600 can improve color purity, thereby enhancing the display effect. A protective film 700 can also be provided on the side of the color filter film 600 away from the quantum dot layer 200. The protective film 700 can be made of a transparent optical adhesive material, which can protect the color filter film 600 and also provide a planarization effect. A light-shielding structure BM is also provided between adjacent filter films, which can be used to separate light from different pixels, blocking light from different pixels at a wide viewing angle and improving color shift at a wide viewing angle.

[0089] For example, such as Figure 6 As shown, the excitation light source 100 may include a driving backplate 110 and an excitation light layer 120. The driving circuit and driving device of the driving backplate 110 can drive the light-emitting material on the excitation light layer 120 to emit light as light source light.

[0090] In some embodiments, multiple fiber optic structures 400 may be arranged in an array. The end faces of the fiber optic structures 400 may be circular, elliptical, or polygonal. For example, the end face shapes of the first end 410 and the second end 420 may be circular, elliptical, square, rectangular, triangular, hexagonal, pentagonal, etc.

[0091] For example, refer to Figure 6 The orthographic projections of adjacent fiber optic structures 400 on the drive backplane 110 do not overlap. A transparent optical adhesive material is spaced between adjacent fiber optic structures 400. A filling layer 500 can be disposed between the focusing layer 300 and the quantum dot layer 200, with the upper surface of the filling layer 500 extending beyond the end face of the second end 420.

[0092] For example, Figure 7 This is a schematic structural diagram of another display panel provided in an embodiment of this application. Figure 7As shown, the surface of the filling layer 500 near the quantum dot layer 200 can also be coplanar with the end face of the second end 420. The filling layer 500 is only filled between adjacent fiber structures 400, so the light emitted from the second end 420 can directly enter the quantum dot layer 200, which can further reduce light scattering.

[0093] For example, refer to Figure 7 The middle arrow illustrates the propagation of light. Part of the light emitted from the excitation layer 120 propagates through the fiber structure 400 to the quantum dot layer 200, while a small portion of the light passes through the gaps between the fiber structures 400 and is directed to the quantum dot layer 200.

[0094] In some embodiments, the outer surfaces of adjacent fiber optic structures 400 are tangent or connected. When the end face of the fiber optic structure 400 is circular or elliptical, the outer surfaces of the fiber optic structure 400 may be tangent; when the end face of the fiber optic structure 400 is polygonal, the outer surfaces of adjacent fiber optic structures 400 may have a contact area.

[0095] For example, Figure 8 This is a schematic diagram of an optical fiber structure arrangement provided for an embodiment of the application. For example... Figure 8 As shown, taking a circular end-faced optical fiber structure 400 as an example, if the outer surfaces of adjacent optical fiber structures 400 are tangent, the gap between adjacent optical fiber structures 400 is smaller. This allows more light to be confined within the optical fiber structure 400, reducing light scattering and collimating the light propagating within the optical fiber structure 400. The gap between adjacent optical fiber structures 400 does not affect light transmission.

[0096] A second aspect of this application provides a display device. Figure 9 This is a schematic structural diagram of a display device provided in an embodiment of this application. Figure 9 As shown, the display device includes a display panel 1000 as described in the first aspect.

[0097] The display device provided in this application embodiment may include displays such as smartphones, tablets, laptops, and televisions.

[0098] The display device provided in this application embodiment focuses and collimates the light emitted by the excitation light source 100 by setting a light-concentrating layer 300 in the display panel 1000. Specifically, an optical fiber structure 400 can be set in the light-concentrating layer 300 to concentrate most of the light for transmission within the optical fiber structure 400, reducing light leakage from the light source, increasing the amount of light received by the quantum dot layer 200, thereby improving the light conversion efficiency of quantum dot emission, improving the color gamut of the display panel, and enhancing the display effect.

[0099] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0100] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0101] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0102] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A display panel, characterized in that, include: Excitation light source; A quantum dot layer is disposed on one side of the excitation light source; A light-concentrating layer is disposed between the excitation source and the quantum dot layer. The light-concentrating layer includes multiple optical fiber structures, with one end face of each optical fiber structure facing the excitation source and the other end face facing the quantum dot layer. The optical fiber structure includes a cladding layer and a core layer, wherein the cladding layer encloses the core layer, and the refractive index of the cladding layer is greater than the refractive index of the core layer; The cladding includes a first cladding and a second cladding, wherein the second cladding is disposed between the first cladding and the core layer; The second cladding layer includes a plurality of first cladding tubes, which are disposed around the core layer; The first cladding tube includes a first cladding and a first core, wherein the first cladding wraps around the first core, and the refractive index of the first core is less than the refractive index of the first cladding.

2. The display panel according to claim 1, characterized in that, The second cladding layer further includes at least one second cladding tube, which is disposed between the core layer and the first cladding tube, or the second cladding tube is disposed between the first cladding layer and the first cladding tube.

3. The display panel according to claim 2, characterized in that, The outer diameter of the second cladding tube is smaller than the outer diameter of the first cladding tube; and / or, The second cladding tube is disposed between two adjacent first cladding tubes.

4. The display panel according to claim 2, characterized in that, The outer surface of the first cladding tube is tangential to or in contact with the outer surface of the second cladding tube; and / or, The outer surface of the first cladding tube is tangential to or in contact with the first cladding; and / or, The outer surface of the second cladding tube is tangent to or in contact with the first cladding.

5. The display panel according to claim 2, characterized in that, The second cladding tube includes a second cladding and a second core, wherein the second cladding encloses the second core, and the refractive index of the second core is less than the refractive index of the second cladding; and / or, The material filling the space between the first cladding layer and the second cladding layer is the same as the material of the core layer.

6. The display panel according to claim 5, characterized in that, The first core is made of the same material as the fiber core layer; and / or, The first cladding layer is made of the same material as the first cladding layer; and / or, The second core is made of the same material as the fiber core layer; and / or, The second cladding layer is made of the same material as the first cladding layer.

7. The display panel according to claim 5, characterized in that, The target wavelength of the light source light incident from one end of the optical fiber structure and exiting from the other end of the optical fiber structure satisfies the following formula: λ=(2t ) / m, Wherein, λ is the target wavelength, t is the thickness of the first cladding and / or the second cladding, n1 is the refractive index of the core layer, and m is the total number of the first cladding tubes and / or the second cladding tubes. The optical fiber structure is used to confine the light of the target wavelength to propagate inside the optical fiber structure. And / or, The refractive index of the core layer is in the range of 1.4 to 1.6, and / or the refractive index of the first cladding layer is in the range of 1.7 to 1.9, and / or the refractive index of the second cladding layer is in the range of 1.7 to 1.

9.

8. The display panel according to claim 1, characterized in that, Also includes: A color filter film is disposed on the side of the quantum dot layer away from the excitation light source; And / or, The excitation light source includes a driving backplate and an excitation light layer, wherein the excitation light layer is disposed between the driving backplate and the quantum dot layer; And / or, The quantum dot layer comprises at least two types of quantum dot material layers, and different types of quantum dot material layers emit different colors of light when excited by the light emitted from the excitation light source.

9. The display panel according to claim 8, characterized in that, In the case where the excitation light source includes a driving backplate and an excitation light layer, the plurality of optical fiber structures are arranged in an array; and / or, The end face of the optical fiber structure is circular, elliptical, or polygonal; and / or, The outer surfaces of adjacent optical fiber structures are tangential or abutted; or, The orthographic projections of adjacent fiber structures on the drive backplane do not overlap.

10. The display panel according to claim 8, characterized in that, A transparent optical adhesive material is used to separate adjacent optical fiber structures.

11. The display panel according to claim 1, characterized in that, The quantum dot layer includes a blank material layer and at least one quantum dot material layer. The blank material layer does not contain any quantum dot material and is used to transmit light emitted by the excitation light source. The quantum dot material layer contains quantum dot material and is used to emit light of a corresponding color when excited by the light emitted by the excitation light source. The light emitted by the quantum dot material layer is a different color from the light emitted by the excitation light source.

12. A display device, characterized in that, include: The display panel as described in any one of claims 1-11.

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