Display panel and display device

Abstract

A display panel and a display device. The display panel comprises: a plurality of reflective structures, and a plurality of quantum dot structures located on one side of the plurality of reflective structures; and a plurality of blue light diodes, wherein the plurality of blue light diodes are located on the side of the plurality of quantum dot structures away from the plurality of reflective structures, and the blue light diodes emit blue light at least toward the corresponding reflective structures.

Description

Display panel 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 display device. Background Art

[0002] LED-based quantum dot display products are usually transmissive quantum dot displays, which can emit pure red and green light by exciting quantum dots with blue light.

[0003] However, since quantum dots cannot completely absorb blue light, a color film needs to be added to the light-emitting side of the display product to absorb the blue light, which results in a low utilization rate of the blue light.

[0004] Summary of the Invention

[0005] Embodiments of the present disclosure provide a display panel and a display device to solve the technical problem of low blue light absorption rate of quantum dot-based display products in the prior art.

[0006] In a first aspect, to solve the above technical problems, embodiments of the present disclosure provide a display panel, including:

[0007] A plurality of reflective structures, and a plurality of quantum dot structures located on one side of the plurality of reflective structures;

[0008] A plurality of blue light diodes are located on a side of the plurality of quantum dot structures away from the plurality of reflective structures, and the blue light diodes emit blue light at least toward the corresponding reflective structures.

[0009] In a possible implementation manner, the display panel includes:

[0010] A first substrate and a second substrate are arranged in a pair, wherein the first substrate and the second substrate are bonded together by a transparent adhesive;

[0011] The plurality of reflective structures and the plurality of quantum dot structures are disposed on the first substrate;

[0012] The plurality of blue light emitting diodes are disposed on the second substrate.

[0013] In one possible implementation manner, the first substrate further includes:

[0014] a first substrate;

[0015] A surface of the first substrate facing the second substrate has a plurality of grooves;

[0016] The reflective structure is located on the inner surface of the groove, and the quantum dot structure fills the corresponding groove.

[0017] In one possible implementation manner, the second substrate further includes:

[0018] a second substrate;

[0019] Multiple groups of color resists are located on one side surface of the second base substrate; each group of color resists includes red color resists and green color resists, the red color resists correspond to the quantum dot structure that emits red light, and the green color resists correspond to the quantum dot structure that emits green light.

[0020] In a possible implementation manner, the groove includes:

[0021] A main groove and at least one auxiliary groove are arranged continuously along a first direction;

[0022] The reflective structure comprises:

[0023] a main reflective structure and at least one auxiliary reflective structure arranged continuously along the first direction; the main reflective structure is located on the inner surface of the main groove, and the auxiliary reflective structure is located on the inner surface of the auxiliary groove;

[0024] The main reflective structure corresponds to a blue light diode, and the at least one auxiliary reflective structure is located between two adjacent main reflective structures; the longitudinal section area of ​​the auxiliary reflective structure is smaller than the longitudinal section area of ​​the main reflective structure;

[0025] The quantum dot structure includes a mixed material of red-light-emitting quantum dots and green-light-emitting quantum dots.

[0026] In a possible implementation manner, the display panel includes:

[0027] a first substrate;

[0028] The multiple reflective structures, the multiple quantum dot structures, and the multiple blue light diodes are all disposed on the first substrate.

[0029] In one possible implementation manner, the first substrate further includes:

[0030] a first substrate;

[0031] A plurality of driving circuits are located on one side of the first substrate; the plurality of driving circuits correspond one-to-one to the plurality of blue light emitting diodes, and the driving circuits are used to drive the corresponding blue light emitting diodes;

[0032] an insulating layer located on a side of the plurality of driving circuits away from the first substrate; the insulating layer having a plurality of grooves on a side away from the first substrate; the reflective structure being located on inner surfaces of the grooves, and the quantum dot structure filling the corresponding grooves;

[0033] an encapsulation layer, located on a side of the insulating layer away from the quantum dot structure;

[0034] Multiple groups of binding pins are located on a side of the packaging layer away from the first substrate; each group of binding pins is bound to a blue light diode, and the binding pins include an anode pin and a cathode pin, the anode pin is electrically connected to the driving circuit, and the cathode pin is electrically connected to the common electrode.

[0035] In a possible implementation manner, the display panel further includes a second substrate, and the second substrate is arranged in a cell with the first substrate and bonded to the first substrate by a transparent adhesive;

[0036] The second substrate includes a second base substrate and multiple groups of color resists, which are arranged on one side surface of the second base substrate; each group of color resists includes red color resists and green color resists, the red color resist corresponds to a quantum dot structure that emits red light, and the green color resist corresponds to a quantum dot structure that emits green light.

[0037] In a possible implementation manner, each group of color resists further includes a blue color resist or a transparent resin, and the transparent resin is used to allow the blue light emitted by the blue light diode to pass through and be emitted from the second base substrate after being reflected by a corresponding reflective structure.

[0038] In a possible implementation, three reflective structures form a group;

[0039] The two reflective structures in each group of reflective structures correspond to the red light emitting quantum dot structure and the green light emitting quantum dot structure respectively, and the remaining reflective structure corresponds to the transparent structure, and the transparent structure fills the groove corresponding to the remaining reflective structure.

[0040] In a possible implementation manner, the longitudinal section of the groove is an inverted isosceles trapezoid or an arc.

[0041] In a possible implementation manner, the blue light emitting diode is a common blue light emitting diode.

[0042] In a possible implementation manner, the second substrate further includes:

[0043] a distributed Bragg reflector layer, located on a side of the second substrate close to the plurality of blue light emitting diodes; the distributed Bragg reflector layer has a through hole at a position corresponding to a reflective structure that does not correspond to a quantum dot structure, and an orthographic projection of the reflective structure that does not correspond to a quantum dot structure on the distributed Bragg reflector structure is located within the through hole;

[0044] The flat layer is filled in the through hole.

[0045] In a possible implementation manner, the blue light diode is a distributed Bragg reflector blue light diode.

[0046] In a second aspect, an embodiment of the present disclosure provides a display device, comprising the display panel described in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] FIG1 is a schematic structural diagram of a display panel provided by an embodiment of the present disclosure;

[0048] FIG2 is a schematic diagram of the structure of a common blue light emitting diode with a flip-chip structure;

[0049] FIG3 is a top view of a common blue light emitting diode with a flip-chip structure;

[0050] FIG4 is a schematic diagram of the structure of a common blue light emitting diode with a vertical structure;

[0051] FIG5 is a top view of a common blue light emitting diode in a vertical structure;

[0052] FIG6 is a schematic structural diagram of a flip-chip DBR blue light emitting diode;

[0053] FIG7 is a top view of a flip-chip DBR blue light emitting diode;

[0054] FIG8 is a schematic structural diagram of a vertical DBR blue light emitting diode;

[0055] FIG9 is a schematic diagram of the transmittance of a DBR blue light diode;

[0056] FIG10 is a comparison diagram of light effects of a reflective structure according to an embodiment of the present disclosure and a transmissive structure according to a related art;

[0057] FIG11 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0058] FIG12 is a first substrate provided by an embodiment of the present disclosure;

[0059] FIG13 is a schematic structural diagram of a first substrate provided in an embodiment of the present disclosure;

[0060] FIG14 is a schematic structural diagram of another first substrate provided in an embodiment of the present disclosure;

[0061] FIG15 is a schematic diagram of manufacturing a first substrate according to an embodiment of the present disclosure;

[0062] FIG16 is a schematic diagram of the distance between the blue light diode and the groove provided by an embodiment of the present disclosure;

[0063] FIG17 is a schematic structural diagram of another first substrate provided by an embodiment of the present disclosure;

[0064] FIG18 is a schematic structural diagram of a first substrate provided in an embodiment of the present disclosure;

[0065] FIG19 is a schematic structural diagram of another first substrate provided by an embodiment of the present disclosure;

[0066] FIG20 is a schematic structural diagram of another first substrate provided in an embodiment of the present disclosure;

[0067] FIG21 is a schematic structural diagram of a backlight source formed by a first substrate and a second substrate according to an embodiment of the present disclosure;

[0068] FIG22 is a schematic structural diagram of a second substrate provided in an embodiment of the present disclosure;

[0069] FIG23 is a schematic diagram of manufacturing a second substrate provided by an embodiment of the present disclosure;

[0070] FIG24 is a schematic structural diagram of another second substrate provided in an embodiment of the present disclosure;

[0071] FIG25 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0072] 26 and 27 are schematic structural diagrams of another second substrate provided in an embodiment of the present disclosure;

[0073] FIG28 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0074] FIG29 is a schematic structural diagram of another display panel provided by an embodiment of the present invention;

[0075] FIG30 is a schematic structural diagram of another first substrate provided in an embodiment of the present disclosure;

[0076] FIG31 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0077] FIG32 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0078] FIG33 is a schematic structural diagram of another second substrate provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0079] Embodiments of the present disclosure provide a display panel and a display device to solve the technical problem of low blue light absorption rate of quantum dot-based display products in the prior art.

[0080] In order to make the above-mentioned purposes, features and advantages of the present disclosure more obvious and easy to understand, the present disclosure will be further described below with reference to the accompanying drawings and examples. However, the example embodiments can be implemented in various forms and should not be understood as being limited to the embodiments set forth herein; on the contrary, these embodiments are provided to make the present disclosure more comprehensive and complete, and to fully convey the concepts of the example embodiments to those skilled in the art. The same figure marks in the figures represent the same or similar structures, and their repeated descriptions will be omitted. The words expressing position and direction described in the present disclosure are all explained using the accompanying drawings as examples, but changes can be made as needed, and all changes are included in the scope of protection of the present disclosure. The drawings of the present disclosure are only used to illustrate relative position relationships and do not represent true proportions.

[0081] It should be noted that specific details are set forth in the following description to facilitate a full understanding of the present disclosure. However, the present disclosure can be implemented in a variety of ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present disclosure. Therefore, the present disclosure is not limited to the specific embodiments disclosed below. The subsequent description of the specification is a preferred embodiment of the present disclosure, but the description is for the purpose of illustrating the general principles of the present disclosure and is not intended to limit the scope of the present disclosure. The scope of protection of the present disclosure shall be as defined by the appended claims.

[0082] A display panel and a display device provided by the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0083] FIG1 is a schematic diagram of the structure of a display panel provided in an embodiment of the present disclosure. The display panel includes:

[0084] A plurality of reflective structures a, and a plurality of quantum dot structures b located on one side of the plurality of reflective structures a;

[0085] A plurality of blue light diodes c are located on a side of the plurality of quantum dot structures b away from the plurality of reflective structures a, and the blue light diodes c at least emit blue light toward the corresponding reflective structure a.

[0086] The reflective structure a can be made of metal material.

[0087] The blue light emitting diode c may be a common blue light emitting diode or a distributed Bragg reflector (DBR) blue light emitting diode.

[0088] Ordinary blue light-emitting diodes can be single-sided, in which case they emit light toward the side a of the reflective structure in the display panel. Ordinary blue light-emitting diodes can also be double-sided, that is, they can emit light toward the side a of the reflective structure and away from the side a of the reflective structure; please refer to Figures 2-5, Figure 2 is a structural schematic diagram of an ordinary blue light-emitting diode with an inverted structure, Figure 3 is a top view of an ordinary blue light-emitting diode with an inverted structure, Figure 4 is a structural schematic diagram of an ordinary blue light-emitting diode with a vertical structure, and Figure 5 is a top view of an ordinary blue light-emitting diode with a vertical structure.

[0089] As shown in FIG2 , a conventional blue light emitting diode with an inverted structure includes: a third substrate c1, a buffer layer c2 located on one side of the third substrate c1, an N-type gallium nitride c3 located on the side of the buffer layer c2 away from the third substrate c1, a multiple quantum well c4 located on the side of the N-type gallium nitride c3 away from the third substrate c1, an electron blocking layer c5 located on the side of the multiple quantum well away from the third substrate c1, a P-type gallium nitride c6 located on the side of the electron blocking layer c5 away from the third substrate c1, and a P-type gallium nitride c7 located on the side of the P-type gallium nitride c7 away from the third substrate c1. The current spreading layer c7 on one side of the substrate, the anode c8 covering the current spreading layer c7, and the cathode c8' located on the side of the N-type layer c3 facing away from the third substrate c1. The cathode c8' is spaced apart from the multiple quantum wells c4, the electron blocking layer c5, the P-type gallium nitride c6, the current spreading layer c7, and the anode c8. There is also an insulating layer c9 located on the side of the anode c8 and cathode c8' facing away from the third substrate c1, and two pins cp connected to the anode c8 and cathode c8', respectively, located on the side of the insulating layer c9 facing away from the third substrate c1. A conventional blue light-emitting diode with a flip-chip structure has two pins located on the same side, as shown in Figure 3. The third substrate can be a silicon substrate or a sapphire substrate.

[0090] As shown in Figure 4 , a typical vertical blue light-emitting diode includes: an anode c8; an indium tin oxide (ITO) layer located on one side of anode c8; a p-type gallium nitride (P-GaN) layer (C6) located on the side of the ITO layer away from anode c8; a multi-quantum well (MQW) layer (C4) located on the side of the P-GaN layer away from anode c8; an N-type gallium nitride (N-GaN) layer (C3) located on the side of the MQW layer (C4) away from anode c8; and a cathode (C8') located on the side of the N-type gallium nitride (N-GaN) layer (C3) away from anode c8. A typical vertical blue light-emitting diode has anode c8 and cathode c8' located on different sides, as shown in Figure 5 .

[0091] The DBR blue light-emitting diode emits light on one side, that is, it emits light toward the side a of the reflective structure. Please refer to Figures 6 to 8. Figure 6 is a structural schematic diagram of a DBR blue light-emitting diode with an inverted structure, Figure 7 is a top view of a DBR blue light-emitting diode with an inverted structure, and Figure 8 is a structural schematic diagram of a DBR blue light-emitting diode with a vertical structure.

[0092] As shown in FIG6 , when the DBR blue light diode adopts a flip-chip structure, compared with the ordinary blue light diode adopting an island structure, the DBR blue light diode is provided with a distributed Bragg reflector DBR on the side of the insulating layer c9 away from the third substrate c3. FIG7 is a top view corresponding to FIG6 .

[0093] As shown in FIG8 , when the DBR blue light diode adopts a vertical structure, compared with an ordinary blue light diode adopting a vertical structure, the DBR blue light diode is provided with a distributed Bragg reflection layer DBR between the anode c8 and the indium tin oxide layer ITO. The top view corresponding to FIG8 can be seen in FIG5 .

[0094] Please see Figure 9 for a schematic diagram of the transmittance of a DBR blue light diode, with transmittance plotted on the vertical axis and wavelength on the horizontal axis. Because the DBR blue light diode includes a distributed Bragg reflector (DBR), light emitted by the red and green quantum dot structures b are transmitted to the opposite side of the DBR blue light diode's light-emitting side. This prevents the DBR blue light diode from blocking red and green light, thereby increasing the aperture ratio and light throughput of the corresponding sub-pixels and enhancing the display quality.

[0095] In the embodiment provided in the present disclosure, by using a DBR blue light diode as the blue light diode c corresponding to the quantum dot structure b, the light emitted by the corresponding quantum dot structure b can be transmitted through the corresponding DBR blue light diode, which is equivalent to increasing the aperture ratio of the corresponding sub-pixel, thereby improving the light throughput.

[0096] In some embodiments, the blue light diode c corresponding to the quantum dot structure b is a DBR blue light diode, and the blue light diode c not corresponding to the quantum dot structure b is an ordinary blue light diode with double-sided light emission. This can increase the aperture ratio of each pixel in the display panel and improve the display effect.

[0097] As shown in Figure 1, the blue light diode c emits blue light at least toward the side of the reflective structure a, so that the blue light emitted by the blue light diode c toward the side of the reflective structure a is partially absorbed by the quantum dot structure b arranged between the reflective structure a and the blue light diode c before reaching the reflective structure a, and the part of the blue light that is not absorbed by the quantum dot structure b can be absorbed again by the quantum dot structure b after being reflected by the reflective structure a, thereby having a higher blue light absorption efficiency than the quantum dots using a transmission structure in the prior art, and can stimulate the quantum dot structure b to emit more light.

[0098] Please refer to Figure 10 for a comparison of the light efficiency of the reflective structure of the present disclosure and the transmissive structure of the related art, provided in an embodiment of the present disclosure. The horizontal axis represents wavelength, and the vertical axis represents light efficiency. Figure 10 shows that the reflective structure a of the present disclosure significantly improves light efficiency compared to the transmissive structure.

[0099] In the embodiments provided herein, by providing a reflective structure a and positioning a quantum dot structure b between a blue light diode c and the reflective structure a, the blue light diode c emits blue light toward the reflective structure a. This allows blue light that is not fully absorbed by the quantum dot structure b to be reflected by the reflective structure a, allowing the quantum dot structure b to absorb the blue light a second time. This effectively improves the efficiency of the quantum dots in absorbing blue light and the luminous efficiency of the quantum dot structure b. FIG11 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure, comprising:

[0100] A first substrate 1 and a second substrate 2 are provided in the box, and the first substrate 1 and the second substrate 2 are bonded together by a transparent adhesive 3;

[0101] A plurality of reflective structures a and a plurality of quantum dot structures b are provided on the first substrate 1;

[0102] A plurality of blue light emitting diodes c are disposed on the second substrate 2 .

[0103] In the embodiment provided in the present disclosure, by setting the blue light emitting diode c on the second substrate 2 and setting the reflective structure a and the quantum dot structure b on the second substrate 2, it is convenient to bind the blue light emitting diode c to the second substrate 2 without affecting the first substrate 1. The second substrate 2 bound with the blue light emitting diode c is bonded to the first substrate 1 including the reflective structure a and the quantum dot structure b through a transparent adhesive 3, so that the blue light emitted by the blue light emitting diode c passes through the quantum dot structure b twice, thereby improving the absorption rate of the blue light.

[0104] Please refer to Figures 12 and 13. Figure 12 is a first base substrate provided in an embodiment of the present disclosure. Figure 13 is a structural diagram of a first substrate provided in an embodiment of the present disclosure. The first substrate 1 further includes:

[0105] The first base substrate 11 ; the first base substrate 11 may be a glass substrate, or a substrate made of other materials, without limitation.

[0106] As shown in FIG12 , the first base substrate 11 has a plurality of grooves 11 a on a side facing the second substrate 2 ;

[0107] As shown in FIG13 , the reflective structure a is located on the inner surface of the groove 11 a , and the quantum dot structure b fills the corresponding groove 11 a .

[0108] In the embodiment provided in the present disclosure, a plurality of grooves 11a are provided on the surface of the first base substrate 11 facing the second substrate 2, and a reflective structure a is provided on the surface of the groove 11a, and then the quantum dot structure b is allowed to fill the corresponding groove 11a, thereby preventing the light emitted by the quantum dot structures b corresponding to different grooves 11a from interfering with each other, thereby improving the display effect and reducing the thickness of the first substrate 1.

[0109] Please refer to FIG. 14 , which is a schematic structural diagram of another first substrate provided in an embodiment of the present disclosure. The first substrate 1 further includes an encapsulation layer 12 , which is located on a side of the quantum dot structure b away from the first base substrate 11 .

[0110] By providing an encapsulation layer 12 on a side of the quantum dot structure b away from the first base substrate 11 , the quantum dot structure b can be encapsulated in the corresponding groove 11 a and protected.

[0111] Please refer to Figure 15 for a schematic diagram of manufacturing the first substrate provided in an embodiment of the present disclosure.

[0112] S1: providing a first substrate 11;

[0113] S2: etching a plurality of grooves 11a on one side of the first base substrate 11;

[0114] S3: depositing a metal layer on the surface of the groove 11 a to form a reflective structure a;

[0115] S4: printing quantum dots on the side of the reflective structure a away from the first base substrate 11 to form a quantum dot structure b, so that the quantum dot structure b fills the corresponding groove 11 a.

[0116] S5: forming an encapsulation layer 12 on a side of the quantum dot structure b away from the first base substrate 11 .

[0117] Please refer to FIG16 for a schematic diagram of the distance between the blue light diode and the groove provided in an embodiment of the present disclosure.

[0118] The distance d between the blue light emitting diode c and the groove 11 a is ≥ 0 μm.

[0119] Continuing with FIG12 , the longitudinal cross-section of the groove 11a can be an inverted isosceles trapezoid or an arc as shown in FIG17 , which is a schematic diagram of the structure of another first substrate provided in an embodiment of the present disclosure. FIG18 shows a schematic diagram of the structure of the first substrate 1 corresponding to the first substrate 11 shown in FIG17 .

[0120] Please refer to FIG19 for a schematic structural diagram of another first substrate provided by an embodiment of the present disclosure. The groove 11a in the first substrate 11 includes:

[0121] The main grooves 11a1 and at least one auxiliary groove 11a2 are continuously arranged along the first direction X; one auxiliary groove 11a2 can be set between two adjacent main grooves 11a1, or two or more auxiliary grooves 11a2 can be set, which is not limited here.

[0122] Please refer to FIG20 for a schematic structural diagram of another first substrate provided in an embodiment of the present disclosure. The reflective structure a in the first substrate 1 includes:

[0123] A main reflective structure a1 and at least one auxiliary reflective structure a2 are arranged continuously along the first direction X; the main reflective structure a1 is located on the inner surface of the main groove 11a1, and the auxiliary reflective structure a2 is located on the inner surface of the auxiliary groove 11a2;

[0124] The main reflection structure a1 corresponds to a blue light diode c, and at least one auxiliary reflection structure a2 is located between two adjacent main reflection structures a1; the longitudinal section area of ​​the auxiliary reflection structure a2 is smaller than the longitudinal section area of ​​the main reflection structure a1; one auxiliary reflection structure a2 can be set between two adjacent main reflection structures a1 as shown in Figure 20, or two or more auxiliary reflection structures a2 can be set, depending on the number of auxiliary grooves 11a2.

[0125] The quantum dot structure b includes a mixed material of red-light-emitting quantum dots and green-light-emitting quantum dots.

[0126] In the embodiment provided by the present disclosure, at least one auxiliary groove 11a2 is provided between adjacent main grooves 11a1, and a main reflective structure a1 corresponding to the blue light-emitting diode c is formed on the surface of the main groove 11a1, and an auxiliary reflective structure a2 is formed on the surface of the auxiliary groove 11a2. A quantum dot structure b comprising red and blue light-emitting quantum dots is formed on the side of the main reflective structure a1 and the auxiliary reflective structure a2 facing the blue light-emitting diode c. This allows the blue light emitted by the blue light-emitting diode c to excite the quantum dot structure b, which then emits red and green light, which mixes with the unabsorbed blue light to form white light. This allows the combination of the first substrate 1 and the second substrate 2 to function as a direct-lit backlight source for a display panel. See Figure 21 for a schematic diagram of the structure of the first and second substrates forming a backlight source according to the embodiment of the present disclosure.

[0127] As shown in Figure 20, when the longitudinal section of the groove 11a is arc-shaped, the longitudinal sections of the main reflection structure a1 and the auxiliary reflection structure a2 formed on the surface of the groove 11a are also arc-shaped. When the blue light emitted by the blue light diode c reaches the main reflection structure a1 and the auxiliary reflection structure a2, the blue light can be reflected in all directions, thereby avoiding the generation of mirror reflection, and thus improving the light output uniformity of the backlight source composed of the combination of the first substrate 1 and the second substrate 2.

[0128] When the combination of the first substrate 1 and the second substrate 2 is used for display, please continue to refer to FIG13 , and every three reflective structures a form a group (as shown in the dotted box in FIG13 );

[0129] The two reflective structures a in each group of reflective structures a correspond to the red-light-emitting quantum dot structure b and the green-light-emitting quantum dot structure b respectively, and the remaining reflective structure a corresponds to the transparent structure, which fills the groove 11a corresponding to the remaining reflective structure a.

[0130] Each of the three reflective structures a corresponds to a red (R) sub-pixel, a green (G) sub-pixel, and a blue (B) sub-pixel. The corresponding quantum dot structure b corresponding to the red sub-pixel emits red light after being excited by blue light, and the quantum dot structure b corresponding to the green sub-pixel emits green light after being excited by blue light. The groove 11a corresponding to the reflective structure a corresponding to the blue sub-pixel is filled with a transparent structure. The blue light emitted by the blue light diode c passes through the transparent structure, is reflected by the reflective structure a, and then passes through the transparent structure again to be emitted to the side of the second substrate 2.

[0131] In the embodiment provided in the present disclosure, by setting every three reflective structures a into a group, and letting the two reflective structures a in each group of reflective structures a correspond to the quantum dot structure b that emits red light and the quantum dot structure b that emits green light, respectively, and the remaining reflective structure a corresponds to the transparent structure, and the transparent structure fills the groove 11a corresponding to the remaining reflective structure a, sub-pixels displaying different colors in the display panel can be formed.

[0132] Please refer to FIG22 for a schematic structural diagram of a second substrate provided in an embodiment of the present disclosure. The second substrate 2 further includes:

[0133] A second base substrate 21;

[0134] Multiple sets of color resists 24 are located on one side of the second base substrate 21. Each set of color resists 24 includes a red resist 24 and a green resist 24. The red resist 24 corresponds to the red-emitting quantum dot structure b, and the green resist 24 corresponds to the green-emitting quantum dot structure b. The multiple sets of color resists 24 can be located on the side of the second base substrate 21 closest to the blue light-emitting diode c or further away from the blue light-emitting diode c. A driving circuit layer 22 is located between the film layer containing the blue light-emitting diode c and the film layer containing the color resists 24.

[0135] The red color resist 24 corresponds to the quantum dot structure b that emits red light. The red color resist 24 only allows red light to pass through. Therefore, even if the blue light emitted by the blue light diode c corresponding to the quantum dot structure b that emits red light is not completely absorbed, it can be filtered by the red color resist 24; the green color resist 24 corresponds to the quantum dot structure b that emits green light. The green color resist 24 only allows green light to pass through. Therefore, even if the blue light emitted by the blue light diode c corresponding to the quantum dot structure b that emits green light is not completely absorbed, it can be filtered by the green color resist 24, thereby preventing cross-color and improving the display effect.

[0136] Since a blue light-emitting diode c is used, there is no color mixing problem in the corresponding blue sub-pixel. Therefore, in the second substrate 2, the sub-pixel corresponding to the reflective structure a without the quantum dot structure b can be provided with or without a blue color resist 24. When the blue color resist 24 is not provided, a transparent resin can be provided at the corresponding position. This not only allows the blue light emitted by the blue light-emitting diode c to pass through and be reflected by the reflective structure a and then emitted from the side away from the first substrate 1, but also keeps the film layer where the multiple color resists 24 are located flat.

[0137] Please refer to Figure 23 for a schematic diagram of the manufacture of a second substrate provided in an embodiment of the present disclosure.

[0138] S21: providing a second substrate 21;

[0139] S22: forming a plurality of color resists 24 on one side of the second base substrate 21;

[0140] S23: forming a driving circuit layer 22 on a side of the plurality of color resists 24 away from the second base substrate 21;

[0141] A pin bound to the blue light emitting diode c is provided on a side of the driving circuit layer 22 away from the second base substrate 21 .

[0142] S24 : Bind the blue light emitting diode c to the pins on the driving circuit layer 22 away from the second base substrate 21 .

[0143] Since the ordinary blue light diode is located on the light-emitting side of the display panel, it will partially block the light emitted by the quantum dot structure b, thereby reducing the aperture ratio of the sub-pixel corresponding to the quantum dot structure b.

[0144] Please refer to Figure 24 for a structural schematic diagram of another second substrate provided in an embodiment of the present disclosure.

[0145] The second substrate 2 further includes:

[0146] A distributed Bragg reflector DBR is located on a side of the second base substrate 21 near the multiple blue light emitting diodes c. The distributed Bragg reflector DBR has a through hole at a position corresponding to the reflective structure a that does not correspond to the quantum dot structure b, and the orthographic projection of the reflective structure a that does not correspond to the quantum dot structure b on the distributed Bragg reflector a is located within the through hole.

[0147] The planarization layer 23 is filled in the through hole.

[0148] Please refer to Figure 25 for a schematic structural diagram of another display panel provided by an embodiment of the present disclosure. The second substrate 2 in Figure 25 is the second substrate 2 shown in Figure 24. Because the optical characteristic of the distributed Bragg reflector (DBR) is to reflect blue light while transmitting red and green light, the distributed Bragg reflector (DBR) does not overlap with the opening area of ​​the blue pixel (i.e., the reflective structure a that does not correspond to the quantum dot structure b). Therefore, a through hole needs to be provided, and the transparent flat layer 23 needs to be filled in the through hole.

[0149] Since the distributed Bragg reflector DBR covers the sub-pixels corresponding to the quantum dot structure b, the light emitted by the red-emitting quantum dot structure b and the green-emitting quantum dot structure b can be transmitted to the rear end of the ordinary blue light diode, so that the ordinary blue light diode will not block the red and green light. Moreover, since the distributed Bragg reflector DBR can reflect blue light, even if the ordinary blue light diode emits light on both sides, the received blue light can be reflected to the quantum dot structure b through the distributed Bragg reflector DBR, thereby stimulating the quantum dots to emit light, thereby effectively improving the sub-pixel aperture ratio, further increasing the light throughput and enhancing the display effect.

[0150] Please refer to Figures 26 and 27 for structural schematic diagrams of another second substrate provided in an embodiment of the present disclosure. As shown in Figure 26, multiple groups of color resists 24 can be set on the side surface of the second base substrate 21 away from the blue light-emitting diode c; or can be set on the side surface of the second base substrate 21 close to the blue light-emitting diode c, as shown in Figure 27.

[0151] It should be understood that to increase light throughput, Figures 26 and 27 use conventional blue light-emitting diodes (LEDs) with dual-sided emission and a distributed Bragg reflector (DBR). If a blue light-emitting diode (c) with distributed Bragg reflectors (DBRs) were used, the DBR would not be necessary. Figure 28 is a schematic diagram of the structure of another display panel according to an embodiment of the present invention. The second substrate in Figure 28 is the same as the second substrate in Figure 27.

[0152] The red color resist 24 corresponds to the quantum dot structure b that emits red light. The red color resist 24 only allows red light to pass through. Therefore, even if the blue light emitted by the blue light diode c corresponding to the quantum dot structure b that emits red light is not completely absorbed, it can be filtered by the red color resist 24; the green color resist 24 corresponds to the quantum dot structure b that emits green light. The green color resist 24 only allows green light to pass through. Therefore, even if the blue light emitted by the blue light diode c corresponding to the quantum dot structure b that emits green light is not completely absorbed, it can be filtered by the green color resist 24, thereby preventing cross-color and further improving the display effect.

[0153] Since a blue light-emitting diode c is used, there is no color mixing problem in the corresponding blue sub-pixel. Therefore, in the second substrate 2, the sub-pixel corresponding to the reflective structure a without the quantum dot structure b can be provided with or without a blue color resist 24. When the blue color resist 24 is not provided, a transparent resin can be provided at the corresponding position. This not only allows the blue light emitted by the blue light-emitting diode c to pass through and be reflected by the reflective structure a and then emitted from the side away from the first substrate 1, but also keeps the film layer where the multiple color resists 24 are located flat.

[0154] FIG29 is a schematic diagram of the structure of another display panel provided in an embodiment of the present disclosure. The display panel includes:

[0155] a first substrate 1;

[0156] A plurality of reflective structures a, a plurality of quantum dot structures b, and a plurality of blue light emitting diodes c are all disposed on the first substrate 1 .

[0157] In the embodiment provided in the present disclosure, by manufacturing the reflective structure a, the quantum dot structure b and the blue light diode c on the same substrate, the alignment error between the blue light diode c and the reflective structure a and the quantum dot structure b can be reduced.

[0158] Please refer to FIG30 for a structural diagram of another first substrate provided in an embodiment of the present disclosure. The first substrate 1 further includes:

[0159] A first substrate 11;

[0160] A plurality of driving circuits 13 are located on one side of the first substrate 11; the plurality of driving circuits 13 correspond one to one with the plurality of blue light emitting diodes c, and the driving circuits 13 are used to drive the corresponding blue light emitting diodes c;

[0161] The insulating layer 14 is located on a side of the plurality of driving circuits 13 away from the first base substrate 11; the side of the insulating layer 14 away from the first base substrate 11 has a plurality of grooves 11a; the reflective structure a is located on the inner surface of the groove 11a, and the quantum dot structure b fills the corresponding groove 11a;

[0162] The encapsulation layer 12 is located on a side of the insulating layer 14 away from the quantum dot structure b;

[0163] Multiple groups of binding pins 15 are located on the side of the packaging layer 12 away from the first substrate 11; each group of binding pins 15 is bound to a blue light emitting diode c, and the binding pins 15 include an anode pin and a cathode pin, the anode pin is electrically connected to the driving circuit 13, and the cathode pin is electrically connected to the common electrode.

[0164] In the embodiment provided in the present disclosure, by setting the driving circuit 13 on the side of the reflective structure a away from the blue light diode c, the corresponding blue light diode c can be controlled by the driving circuit 13, and the driving circuit 13 can be prevented from blocking the opening of the corresponding sub-pixel, thereby improving the aperture ratio of the corresponding sub-pixel.

[0165] Please refer to Figure 31 for a structural diagram of another display panel provided in an embodiment of the present disclosure.

[0166] The display panel further includes a second substrate 2, which is arranged in a cell with the first substrate 1 and bonded together with a transparent adhesive 3;

[0167] The second substrate 2 includes a second base substrate 21 and multiple groups of color resists 24, which are arranged on one side surface of the second base substrate 21; each group of color resists 24 includes a red color resist 24 and a green color resist 24, the red color resist 24 corresponds to the quantum dot structure b that emits red light, and the green color resist 24 corresponds to the quantum dot structure b that emits green light.

[0168] As shown in FIG31 , the plurality of color resists 24 may be arranged on a surface of the second base substrate 21 facing the first substrate 1 , or on a surface of the second base substrate 21 facing away from the first substrate 1 .

[0169] In the position corresponding to the blue sub-pixel in the second substrate 2 (that is, the position in the film layer where the multiple color resists 24 are located that does not correspond to the quantum dot structure b), a blue color resist 24 can be set, or a blue color resist 24 can be not set; if the corresponding position of the blue color resist 24 is not set, a transparent resin can be set to fill the corresponding position, so that the light emitted by the blue light emitting diode c can pass through and be reflected by the corresponding reflective structure a and then emitted from the second base substrate 21, while the film layer where the multiple color resists 24 are located can remain flat.

[0170] The blue light diode c in FIG31 can be an ordinary blue light diode or a distributed Bragg reflector (DBR) blue light diode.

[0171] When a common blue light emitting diode is used, the common blue light emitting diode can emit light on both sides, that is, it can emit light toward the side where the reflective structure a is located, and can also emit light toward the side where the second base substrate 21 is located. In this case, referring to FIG. 32 , which is a structural diagram of another display panel provided in an embodiment of the present disclosure, the second substrate 2 in the display panel further includes:

[0172] A distributed Bragg reflector DBR is located on a side of the second substrate 21 near the multiple blue light emitting diodes c. The distributed Bragg reflector DBR has a through hole at a position corresponding to the reflective structure a that does not correspond to the quantum dot structure b, and the orthographic projection of the reflective structure a that does not correspond to the quantum dot structure b on the distributed Bragg reflector a is located within the through hole.

[0173] The planar layer 23 is filled in the through hole.

[0174] In the embodiment provided in the present disclosure, a distributed Bragg reflector DBR is provided on a side of the second base substrate 21 close to the blue light diode c, and a through hole is provided between the distributed Bragg reflector DBR and the reflective structure a that does not correspond to the quantum dot structure b, and a flat layer 23 is filled in the through hole. The distributed Bragg reflector DBR can be used to filter the blue light that is not completely absorbed at the position corresponding to the quantum dot structure b, and the blue light at the position where the quantum dot structure b is not provided can be allowed to pass through the Bragg reflector, thereby improving the display effect.

[0175] FIG33 is a schematic diagram of another second substrate structure according to an embodiment of the present disclosure. The second substrate 2 can include multiple sets of color resists 24 and a distributed Bragg reflector (DBR). The DBR is located on the side of the multiple sets of color resists 24 that is closest to the blue light emitting diode (c). By including both multiple sets of color resists 24 and the distributed Bragg reflector (DBR) on the second substrate 2, the display effect can be further improved.

[0176] Based on the same inventive concept, an embodiment of the present disclosure provides a display device, which includes the display panel as described above.

[0177] The display device can be a quantum dot display, a quantum dot display screen, a quantum dot TV or other display device, or can be a mobile device such as a mobile phone, a tablet computer, or a notebook.

[0178] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present disclosure.

[0179] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include these modifications and variations.

Claims

1. A display panel, comprising: A plurality of reflective structures, and a plurality of quantum dot structures located on one side of the plurality of reflective structures; A plurality of blue light diodes are provided, wherein the plurality of blue light diodes are located on a side of the plurality of quantum dot structures away from the plurality of reflective structures, and the blue light diodes at least emit blue light toward the corresponding reflective structures.

2. The display panel according to claim 1, comprising: A first substrate and a second substrate are arranged in the box, wherein the first substrate and the second substrate are bonded together by a transparent adhesive; The plurality of reflective structures and the plurality of quantum dot structures are disposed on the first substrate; The plurality of blue light emitting diodes are disposed on the second substrate.

3. The display panel according to claim 2, wherein the first substrate further comprises: a first substrate base plate; A surface of the first substrate facing the second substrate has a plurality of grooves; The reflective structure is located on the inner surface of the groove, and the quantum dot structure fills the corresponding groove.

4. The display panel according to claim 3, wherein the second substrate further comprises: a second substrate base plate; A plurality of groups of color resists are located on one side surface of the second substrate; Each group of color resists includes red color resists and green color resists. The red color resists correspond to the quantum dot structure emitting red light, and the green color resists correspond to the quantum dot structure emitting green light.

5. The display panel according to claim 3 or 4, wherein the groove comprises: A main groove and at least one auxiliary groove are arranged continuously along a first direction; The reflective structure comprises: A main reflective structure and at least one auxiliary reflective structure arranged continuously along the first direction; The main reflection structure is located on the inner surface of the main groove, and the auxiliary reflection structure is located on the inner surface of the auxiliary groove; The main reflection structure corresponds to a blue light diode, and the at least one auxiliary reflection structure is located at Between two adjacent main reflection structures; the longitudinal section area of ​​the auxiliary reflection structure is smaller than the longitudinal section area of ​​the main reflection structure; The quantum dot structure includes a mixed material of red-light-emitting quantum dots and green-light-emitting quantum dots.

6. The display panel according to claim 1, comprising: a first substrate; The multiple reflective structures, the multiple quantum dot structures, and the multiple blue light diodes are all disposed on the first substrate.

7. The display panel according to claim 6, wherein the first substrate further comprises: a first substrate base plate; A plurality of driving circuits are located on one side of the first substrate; The plurality of driving circuits correspond to the plurality of blue light diodes one by one, and the driving circuits are used to drive the corresponding blue light diodes; The insulating layer is located on a side of the plurality of driving circuits away from the first substrate; the insulating layer has a plurality of grooves on a side away from the first substrate; the reflective structure is located on an inner surface of the groove, and the quantum dot structure fills the corresponding grooves; An encapsulation layer, located on a side of the insulating layer away from the quantum dot structure; A plurality of groups of binding pins are located on a side of the packaging layer away from the first substrate; each group of binding pins is bound to a blue light diode, and the binding pins include an anode pin and a cathode pin, the anode pin is electrically connected to the driving circuit, and the cathode pin is electrically connected to a common electrode.

8. The display panel according to claim 7, further comprising a second substrate, wherein the second substrate is arranged in a cell with the first substrate and is bonded with the first substrate by a transparent adhesive; The second substrate includes a second base substrate and multiple groups of color resists, which are arranged on one side surface of the second base substrate; each group of color resists includes red color resists and green color resists, the red color resist corresponds to a quantum dot structure that emits red light, and the green color resist corresponds to a quantum dot structure that emits green light.

9. The display panel as described in claim 4 or 8, wherein each group of color resists further includes a blue color resist or a transparent resin, and the transparent resin is used to allow the blue light emitted by the blue light diode to pass through and be emitted from the second base substrate after being reflected by a corresponding reflective structure.

10. The display panel according to any one of claims 3-4 and 6-7, wherein each three reflective structures form a group; Two reflective structures in each group of reflective structures correspond to the red light emitting quantum dot structure and the green light emitting quantum dot structure respectively, and the remaining reflective structure corresponds to the transparent structure, and the transparent structure fills the groove corresponding to the remaining reflective structure.

11. The display panel according to any one of claims 3-4 and 6-7, wherein the longitudinal section of the groove is an inverted isosceles trapezoid or an arc.

12. The display panel according to any one of claims 1 to 11, wherein the blue light emitting diode is a common blue light emitting diode.

13. The display panel according to claim 12, wherein the second substrate further comprises: A distributed Bragg reflection layer is located on a side of the second substrate close to the plurality of blue light diodes; The distributed Bragg reflection layer has a through hole at a position of a reflection structure not corresponding to a quantum dot structure, and the orthographic projection of the reflection structure not corresponding to the quantum dot structure on the distributed Bragg reflection structure is located in the through hole; The planar layer is filled in the through hole.

14. The display panel according to any one of claims 1 to 11, wherein the blue light emitting diode is a distributed Bragg reflection blue light emitting diode.

15. A display device comprising the display panel according to any one of claims 1 to 14.

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