WO2023201826A1 - 发光板、发光板的制备方法及显示终端 - Google Patents

发光板、发光板的制备方法及显示终端 Download PDF

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Publication number
WO2023201826A1
WO2023201826A1 PCT/CN2022/094123 CN2022094123W WO2023201826A1 WO 2023201826 A1 WO2023201826 A1 WO 2023201826A1 CN 2022094123 W CN2022094123 W CN 2022094123W WO 2023201826 A1 WO2023201826 A1 WO 2023201826A1
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WIPO (PCT)
Prior art keywords
reflective
driving substrate
light
light source
mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/094123
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English (en)
French (fr)
Inventor
孙荷静
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Huizhou China Star Optoelectronics Display Co Ltd
Original Assignee
TCL China Star Optoelectronics Technology Co Ltd
Huizhou China Star Optoelectronics Display Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TCL China Star Optoelectronics Technology Co Ltd, Huizhou China Star Optoelectronics Display Co Ltd filed Critical TCL China Star Optoelectronics Technology Co Ltd
Priority to US17/780,982 priority Critical patent/US12147116B2/en
Publication of WO2023201826A1 publication Critical patent/WO2023201826A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs

Definitions

  • the present invention relates to the field of backlight display, and in particular, to a luminescent panel, a preparation method of the luminescent panel and a display terminal.
  • Mini-LED mainly helps the upgrade of LCD panels and small-pitch light-emitting diodes in the two directions of backlight and self-illumination respectively.
  • One application is the backlight direction: it is mainly used to help the display upgrade of LCD panels. Combined with LCD panels, it can achieve borderless light sources, area control, etc., helping traditional LCD panels to improve contrast and clarity, and then match the performance of organic light-emitting diodes.
  • the gap is narrowed, and the cost of Mini-LED substrates used as backlights for liquid crystal display panels is lower than that of organic light-emitting diodes.
  • Mini-LED or Micro-LED self-illumination is an upgrade of small-pitch light-emitting diodes. Due to the continuous shrinkage of light-emitting diodes, there is a certain degree of optical crosstalk between light-emitting diode chips, which affects the quality of the picture. promote.
  • the present invention provides a luminescent panel and a preparation method thereof that can reduce optical crosstalk and improve light extraction efficiency.
  • the present invention provides a light-emitting panel, including a driving substrate and a plurality of light sources disposed on the driving substrate and electrically connected to circuits in the driving substrate; the light-emitting panel further includes: a plurality of reflective structures , arranged on the driving substrate; one of the light sources is located between two adjacent reflective structures; each of the reflective structures includes a first side facing the light source and a side opposite to the first side. the second side; and in one of the reflective structures, the first side and the second side are both concave surfaces, and the first side and the second side are relatively concave.
  • first side and the second side are both arcuate surfaces, and the center of the arcuate surface is located on the side of the light source facing the first side.
  • first side and the second side are both connected by at least two planes.
  • the height of the light source in a direction perpendicular to the driving substrate, is lower than the height of the reflective structure.
  • the light source is received in the receiving cavity, and the opening of one end of the receiving cavity away from the driving substrate is
  • the characteristic size is greater than or equal to the size of the characteristic size of the light source in a direction parallel to the driving substrate.
  • the height of the light source in a direction perpendicular to the driving substrate, is equal to the height of the reflective structure.
  • the light source is received in the receiving cavity, and the opening of one end of the receiving cavity away from the driving substrate is
  • the characteristic size is larger than the size of the characteristic size of the light source in a direction parallel to the driving substrate.
  • the material of the reflective structure includes at least one of an ink matrix and a photosensitive matrix, and reflective particles dispersed in at least one of the ink matrix and the photosensitive matrix.
  • the reflective structure includes a plurality of reflective layers stacked on the driving substrate, from the reflective layer close to the driving substrate to all the reflective layers farthest from the driving substrate.
  • the characteristic size of the reflective layer in the first direction first decreases and then increases; wherein the first direction is parallel to the driving substrate and is consistent with the recess of the first side of the reflective structure. Same direction.
  • the diameter of the reflective particles is less than 10 microns.
  • the present invention provides a method for preparing a luminescent panel, including the steps:
  • a reflective mixture Preparing a reflective mixture, the reflective mixture including reflective particles mixed together, and at least one of a photosensitive substance and an ink matrix;
  • a driving substrate is provided, and the reflective mixture formed on the driving substrate is patterned through a photolithography process or a 3D printing process to obtain a plurality of the reflective structures; two adjacent reflective structures are opposite to each other. The two sides are concave; and
  • a plurality of light sources are provided on the driving substrate, and one light source is located between two adjacent reflective structures.
  • the reflective structure when the reflective mixture includes the reflective particles and the photosensitive material, or when the reflective mixture includes the reflective particles, the photosensitive material and the ink matrix, the The reflective structure is formed through a photolithography process or a 3D printing process; when the reflective mixture includes the reflective particles and the ink matrix, the reflective structure is formed through a 3D printing process.
  • the photolithography process includes:
  • the first heating is performed simultaneously on the side of the reflective mixture that is in contact with the driving substrate and the other side of the reflective mixture that is away from the driving substrate;
  • the patterned reflective mixture is heated twice to obtain the reflective structure.
  • the 3D printing process includes: using the reflective mixture as a 3D printing material to perform 3D printing on the driving substrate in batches to form multiple stacks on the driving substrate.
  • a reflective layer is provided; from the reflective layer close to the driving substrate to the reflective layer farthest from the driving substrate, the characteristic size of the reflective layer in the first direction first decreases and then increases; Wherein, the first direction is parallel to the driving substrate and consistent with the recessed direction of the first side of the reflective structure.
  • the present invention provides a display terminal, including a backlight module and a display panel.
  • the backlight module is arranged opposite to the display panel.
  • the backlight module includes a luminescent panel.
  • the luminescent panel is located on the display panel.
  • the light incident side of the panel wherein the luminescent panel includes a driving substrate and a plurality of light sources disposed on the driving substrate and electrically connected to the circuit in the driving substrate; the luminescent panel also includes: a plurality of reflective structures , arranged on the driving substrate; one of the light sources is located between two adjacent reflective structures; each of the reflective structures includes a first side facing the light source and a side opposite to the first side. the second side; and in one of the reflective structures, the first side and the second side are both concave surfaces, and the first side and the second side are relatively concave.
  • the first side and the second side are both arcuate surfaces, and the center of the arcuate surface is located on the side of the light source facing the first side.
  • the first side and the second side are both connected by at least two planes.
  • the height of the light source in a direction perpendicular to the driving substrate, is lower than the height of the reflective structure; there is a receiving cavity between two adjacent reflective structures, so The light source is accommodated in the receiving cavity, and the characteristic size of the opening at one end of the receiving cavity away from the driving substrate is greater than or equal to the characteristic size of the light source in a direction parallel to the driving substrate.
  • the height of the light source in a direction perpendicular to the driving substrate, is equal to the height of the reflective structure, and there is a receiving cavity between two adjacent reflective structures.
  • the light source is accommodated in the receiving cavity, and the characteristic size of the opening at one end of the receiving cavity away from the driving substrate is larger than the characteristic size of the light source in a direction parallel to the driving substrate.
  • the material of the reflective structure includes at least one of an ink matrix and a photosensitive matrix, and reflective particles dispersed in at least one of the ink matrix and the photosensitive matrix.
  • a reflective structure is provided between two adjacent light sources, and the surface of the reflective structure facing the light source is configured as a concave surface.
  • the light-collecting effect of the concave surface can be used to convert the light-emitting panel into a concave surface.
  • the light emitted from the sides of two adjacent light sources is collected in all directions, which not only reduces the light crosstalk between the two adjacent light sources, but also reduces the loss of light to improve the light extraction efficiency and thereby improve the picture quality.
  • Figure 1 is a cross-sectional view of a light-emitting panel provided by the first embodiment of the present invention.
  • FIG. 2 is a schematic diagram of the light emitting panel shown in FIG. 1 .
  • Figure 3 is a cross-sectional view of the reflective structure of the light-emitting panel provided by the second embodiment of the present invention.
  • Figure 4 is a cross-sectional view of the reflective structure of the light-emitting panel provided by the third embodiment of the present invention.
  • Figure 5 is a cross-sectional view of the reflective structure of the light-emitting panel provided by the fourth embodiment of the present invention.
  • Figure 6 is a flow chart of a method for preparing a luminescent panel according to a preferred embodiment of the present invention.
  • Figure 7 is a cross-sectional view of a display terminal provided by a preferred embodiment of the present invention.
  • the present invention may repeat reference numerals and/or reference letters in different implementations. Such repetition is for the purposes of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed.
  • the present invention provides a light-emitting panel 100 , wherein the light-emitting panel 100 includes a driving substrate 10 and a plurality of light sources disposed on the driving substrate 10 and electrically connected to circuits in the driving substrate 10 20 and a plurality of reflective structures 30 arranged on the driving substrate 10 , and one light source 20 is located between two adjacent reflective structures 30 .
  • the light source 20 is a Mini LED or Micro LED, which can be directly used as a display light source.
  • the light-emitting panel 100 is a direct display panel.
  • the light source 20 may be a backlight source, in which case the light-emitting panel 100 is actually part of the backlight module.
  • the present invention does not limit the application scenarios of the light-emitting panel 100.
  • the light-emitting panel 100 further includes an encapsulation layer 40 formed on the driving substrate 10 and covering the light source 20 and the reflective structure 30 .
  • the driving substrate 10 includes a substrate (not shown) and a driving circuit layer (not shown) formed on the substrate.
  • the driving circuit layer is electrically connected to the light source 20 to drive the light source 20 .
  • the light source 20 emits light.
  • the driving circuit layer includes at least one driving transistor (not shown), each of the driving transistors includes a gate, an active layer and a source-drain layer, and the active layer is opposite to the gate, The source and drain layers are opposite to and electrically connected to the active layer, and the source and drain layers are electrically connected to the light source 20 .
  • the driving transistor also includes a gate insulating layer, a passivation layer and a flat layer. The gate insulating layer covers the active layer, the passivation layer covers the source and drain layers, and the flat layer Formed on the passivation layer, the light source 20 and the reflective structure 30 are formed on the flat layer.
  • the structure of the driving circuit layer is not limited to the above description, and may also have other structures. Specifically, the driving transistor may have a bottom gate structure, a top gate structure, a double gate structure, etc., which may be determined according to actual conditions.
  • the light source 20 is a light emitting diode (Light Emitting Diode). Diode, LED). It can be seen that the light source 20 is not limited to a light emitting diode, and may also be other light sources.
  • the light source 20 is at least one of a red LED, a green LED, a blue LED, etc.
  • the colors of two adjacent light sources 20 may be the same or different.
  • two adjacent light sources 20 have different colors, and three adjacent light sources 20 (red LED, green LED, and blue LED) constitute a light-emitting unit.
  • the light source 20 includes a first light-emitting surface 21 facing away from the driving substrate 10 and a second light-emitting surface 22 and a third light-emitting surface 23 connected to the first light-emitting surface 21 .
  • the second light-emitting surface 22 and The third light-emitting surfaces 23 respectively face the reflective structures 30 .
  • the second light-emitting surface 22 and the third light-emitting surface 23 are not connected and are arranged oppositely.
  • the light source 20 may be a polyhedral structure.
  • the surface opposite to the reflective structure 30 is also more than the second light-emitting surface 22 and the third light-emitting surface 23 .
  • the second light-emitting surface 22 and the third light-emitting surface 23 are connected.
  • the light source 20 can be a circular, partially circular or elliptical structure.
  • the second light-emitting surface 22 and the third light-emitting surface 23 can be regarded as the same surface.
  • Each of the reflective structures 30 includes a first surface 31 that is in contact with the driving substrate 10 , a second surface 32 that is opposite to the first surface 31 , and a first side surface 33 that faces the light source 20 . and a second side 34 opposite to the first side 33; one end of the first side 33 and the second side 34 is connected to the first surface 31, and the other end is connected to the second surface 32 connected; define the shortest distance between the first side 33 and the second side 34 as d1, and the distance between the ends of the first side 33 and the second side 34 away from the driving substrate 10 The distance is d2, and the distance between the first side surface 33 and the second side surface 34 and the end portion of the driving substrate 10 is d3, then d1 ⁇ d2 and d1 ⁇ d3.
  • the first side 33 faces the third light-emitting surface 23
  • the second side 34 faces the second light-emitting surface 22 .
  • first side 33 and the second side 34 are both concave surfaces, and the first side 33 and the second side 34 are relatively concave.
  • first side 33 and the second side 34 are both arcuate surfaces, and the center of the arcuate surface is located at the light source disposed facing the first side 33 20 a side.
  • the height of the light source 20 is lower than the height of the reflective structure 30 . That is to say, there is a step difference between the first light-emitting surface 21 and the second surface 32 , so that the distance from the second light-emitting surface 22 and/or the third light-emitting surface 23 of the light source 20 is at the desired position. After multiple reflections on the second side 34 and/or the first side 33, they can be emitted from the gap between the first light-emitting surface 21 and the second surface 32, thereby further increasing the number of light sources. Light extraction efficiency of 20%.
  • the characteristic size d5 of the opening of the end of the receiving cavity 35 away from the driving substrate 10 is greater than Or equal to the size of the characteristic dimension d4 of the light source 20 in the direction parallel to the driving substrate 10 .
  • the side light reflected by the reflective structure 30 is not affected from being emitted from the front of the light source 20 , which is beneficial to increasing the light extraction efficiency of the light source 20 .
  • the portion of the receiving cavity 35 facing away from the driving substrate is larger than the characteristic dimension d4 of the light source 20 in a direction parallel to the driving substrate 10 . In this way, the side light reflected by the reflective structure 30 is not affected from being emitted from the front of the light source 20 , which is beneficial to increasing the light extraction efficiency of the light source 20 .
  • the material of the reflective structure 30 includes at least one of an ink matrix (not shown) and a photosensitive matrix (not shown), and at least one of the ink matrix and the photosensitive matrix is dispersed in the material. Reflective particles in the species (not shown).
  • the ink base may be a component of conventional ink mentioned in the prior art.
  • the photosensitive matrix may be a component of a conventional photoresist mentioned in the prior art.
  • the ink matrix and the photosensitive matrix are not limited to the conventional ink components and the conventional photoresist components mentioned in the prior art. They can also be prepared according to the actual situation. .
  • the photosensitive matrix is formed by photocuring of the photosensitive material
  • the photosensitive material makes the reflective structure have photosensitive properties
  • the reflective particles make the reflective structure have photosensitive properties. Reflective properties, such that the reflective structure can be formed through a photolithography process.
  • the photosensitive material includes photosensitive resin, reactive diluent, photoinitiator and other auxiliaries.
  • the photosensitive resin is diazoquinone resin
  • the reactive diluent is propylene glycol-2-propanol (PGME)
  • the auxiliary agent is anti-skinning agent. agent, anti-reprint agent, slip agent, etc.
  • the type of photosensitive resin is not limited to diazoquinone resin
  • the type of reactive diluent is not limited to PGME, and can be selected according to actual conditions.
  • the ink matrix may include a resin matrix (binder), pigments, fillers, auxiliaries, solvents, etc. Since there are many ink formulas in the prior art, they will not be described in detail here.
  • the reflective particles may be elements or compounds of metals such as aluminum and silver with high reflectivity, or may be glass or pearlescent materials with high reflectivity.
  • the diameter of the reflective particles is less than 10 microns.
  • the shape of the reflective particles may be spherical, ellipsoidal, conical cylinder, prism, cylindrical, irregular prism, etc.
  • part of the light L1 emitted from the second light-emitting surface 22 or the third light-emitting surface 23 can directly pass through the second surface 32 and the first side 33 or the third side of the reflective structure 30 .
  • the light L1 emitted from the intersection of the two side surfaces 34 is the boundary light of the light emitted by the light source 20 .
  • the light emitted by the light source 20 depends on the height of the reflective structure 30 .
  • Part of the light L2 emitted from the second light emitting surface 22 or the third light emitting surface 23 may be reflected once on the first side 33 or the second side 34 of the reflective structure 30 and then emitted.
  • Part of the light L3 emitted from the second light exit surface 22 or the third light exit surface 23 can be reflected on the first side 33 or the second side 34 of the reflective structure 30 and the second side of the light source 20 .
  • the light is reflected multiple times on the light-emitting surface 22 or the third light-emitting surface 23 and then emitted.
  • Part of the light L4 emitted from the first light exit surface 21 can be reflected on the first side 33 or the second side 34 of the reflective structure 30 and the second light exit surface 22 or the third side of the light source 20 . It is reflected multiple times on the light exit surface 23 and then emitted.
  • a second embodiment of the present invention provides a reflective structure 50.
  • the reflective structure 50 has a structure similar to that of the reflective structure 30. The only difference is that the reflective structure 50 includes a plurality of The reflective layers stacked on the driving substrate 10 , from the reflective layer close to the driving substrate 10 to the reflective layer farthest from the driving substrate, the characteristics of the reflective layer in the first direction D1 The size first decreases and then increases.
  • the first direction D1 is parallel to the driving substrate 10 and consistent with the recessed direction of the first side surface 33 of the reflective structure 30 .
  • the reflective structure 50 can be formed through a 3D printing process.
  • the material of the reflective structure 50 may include at least one of an ink matrix and a photosensitive matrix, and reflective particles dispersed in at least one of the ink matrix and the photosensitive matrix. That is, when the reflective structure 50 is formed through a 3D printing process, it is not limited to whether the material of the reflective structure 50 includes a photosensitive matrix.
  • a third embodiment of the present invention provides a reflective structure 60.
  • the reflective structure 60 has a similar structure to the reflective structure 30. The only difference lies in that the first side 63 of the reflective structure 60 and the second side 64 are connected by multiple planes. That is, the first side 63 and the second side 64 of the reflective structure 60 are not smooth arc surfaces.
  • the fourth embodiment of the present invention provides a reflective structure 70.
  • the reflective structure 70 has a similar structure to the reflective structure 30. The only difference lies in that the first side 73 of the reflective structure 70 and the second side 74 are connected by two planes.
  • the present invention also provides a method for preparing a luminescent panel, which includes the steps:
  • S1 Prepare a reflective mixture, which includes reflective particles mixed together and at least one of a photosensitive substance and an ink matrix;
  • S2 Provide a driving substrate 10, and pattern the reflective mixture formed on the driving substrate 10 through a photolithography process or a 3D printing process to obtain a plurality of the reflective structures; two adjacent ones The two opposite sides of the reflective structure are concave; and
  • S3 Multiple light sources 20 are arranged on the driving substrate 10 , and one light source 20 is located between two adjacent reflective structures 30 or 50 .
  • the material of the reflective structure 30 includes at least one of an ink matrix (not shown) and a photosensitive matrix (not shown), and at least one of the ink matrix and the photosensitive matrix is dispersed in the material. Reflective particles in the species (not shown).
  • the photosensitive matrix is formed by photocuring the photosensitive material.
  • the reflective mixture can be obtained by directly mixing at least one of the reflective particles, the ink matrix (not shown) and the photosensitive material together, or the photosensitive material can be added to the reflective ink (including the reflective particles and the ink matrix). .
  • the ink base may be a component of conventional ink mentioned in the prior art.
  • the photosensitive material may be a component of conventional photoresist mentioned in the prior art.
  • the ink matrix and the photosensitive matrix are not limited to the conventional ink components and the conventional photoresist components mentioned in the prior art. They can also be prepared according to the actual situation. .
  • the photosensitive material makes the reflective structure have photosensitive properties
  • the reflective particles make the reflective structure have reflective properties.
  • the reflective material can be formed through a photolithography process. structure.
  • the photosensitive material includes photosensitive resin, reactive diluent, photoinitiator and other auxiliaries.
  • the photosensitive resin is diazoquinone resin
  • the reactive diluent is propylene glycol-2-propanol (PGME)
  • the auxiliary agent is anti-skinning agent. agent, anti-reprint agent, slip agent, etc.
  • the type of photosensitive resin is not limited to diazoquinone resin
  • the type of reactive diluent is not limited to PGME, and can be selected according to actual conditions.
  • the ink matrix may include a resin matrix (binder), pigments, fillers, auxiliaries, solvents, etc. Since there are many ink formulas in the prior art, they will not be described in detail here.
  • the reflective particles may be elements or compounds of metals such as aluminum and silver with high reflectivity, or may be glass or pearlescent materials with high reflectivity.
  • the diameter of the reflective particles is less than 10 microns.
  • the shape of the reflective particles may be spherical, ellipsoidal, conical cylinder, prism, cylindrical, irregular prism, etc.
  • the reflective structure when the reflective mixture includes the reflective particles and the photosensitive material, or when the reflective mixture includes the reflective particles, the photosensitive material and the ink matrix, the The reflective structure can be formed through a photolithography process or a 3D printing process; when the reflective mixture includes the reflective particles and the ink matrix, the reflective structure can be formed through a 3D printing process.
  • the photolithography process includes: coating the reflective mixture on the driving substrate 10; The other side of the reflective mixture away from the driving substrate 10 is heated for the first time at the same time; and the reflective mixture is patterned through an exposure and development process; and the patterned reflective mixture is heated twice to obtain The reflective structure 30.
  • the first heating can be done by infrared heating, using an infrared light source to simultaneously illuminate the side of the driving substrate 10 away from the reflective mixture and the side of the reflective mixture away from the driving substrate 10.
  • the penetration of the heating is used to simultaneously heat the side of the reflective mixture close to the driving substrate 10 and the side away from the driving substrate 10 for the first time.
  • the driving substrate 10 should preferably be a transparent substrate or a light-transmitting substrate.
  • the reflective mixture when the reflective structure 30 is formed through a photolithography process, the reflective mixture must include a photosensitive substance.
  • the step of "heating for the first time simultaneously the side of the reflective mixture that is in contact with the driving substrate 10 and the other side of the reflective mixture that is away from the driving substrate 10" can be used to heat the reflective mixture.
  • a pre-curing is performed, the solvent content is reduced and some molecules undergo a certain pre-cross-linking reaction.
  • the pre-cross-linking reaction improves the side of the reflective mixture that is in contact with the driving substrate 10 and the side facing away from the driving substrate 10 .
  • the etching resistance of the other side is lower than that of the two ends of the reflective mixture, and the middle part of the mixture has fewer molecules that undergo pre-crosslinking reactions.
  • the etching resistance of The etching degree of the side of the reflective mixture that is attached to the driving substrate 10 and the other side away from the driving substrate 10 is lower than the etching degree of the middle part of the reflective mixture, which is beneficial to Concave surfaces (first side 33 and second side 34) are formed.
  • the reflective structure 30 can be completely cured by heating the patterned reflective mixture a second time. Specifically, the temperature of the second heating is greater than the temperature of the first heating.
  • the 3D printing process includes: using the reflective mixture as a 3D printing material to perform 3D printing on the driving substrate 10 in batches to form multiple layers on the driving substrate 10 .
  • a stack of reflective layers is provided; from the reflective layer close to the driving substrate 10 to the reflective layer farthest from the driving substrate 10 , the characteristic size of the reflective layer first decreases and then increases.
  • the characteristic size of the reflective layer refers to the size of each reflective layer in the first direction D1.
  • the first direction D1 is parallel to the driving substrate 10 and consistent with the recessed direction of the first side surface 33 of the reflective structure.
  • the driving substrate 10 now forms a bottom reflective layer 36 through 3D printing technology, then forms an intermediate reflective layer 37 on the bottom reflective layer 36, and then forms a top reflective layer 38 on the intermediate reflective layer 37.
  • the bottom reflective layer 36, the middle reflective layer 37 and the top reflective layer 38 include one or more layers of reflective films.
  • the reflective mixture may or may not include a photosensitive material.
  • a quick curing agent (such as a photocuring agent, etc.) can also be added to the reflective mixture to quickly set the shape after printing; after curing, the photosensitive material becomes a photosensitive matrix.
  • the present invention also provides a display terminal 1000 .
  • the display terminal 1000 includes the backlight module and the display panel 200 .
  • the backlight module is arranged opposite to the display panel 200 .
  • the backlight module includes the luminescent panel 100 as described above.
  • the luminescent panel 100 is located on the light incident side of the display panel 200 .
  • the display panel 200 may be a liquid crystal display panel.
  • the display panel 200 includes an array substrate, a liquid crystal and a color filter substrate.
  • the array substrate and the color filter substrate are arranged opposite to each other.
  • the liquid crystal is sandwiched between the array and the color filter substrate. between the substrate and the color filter substrate. Since the liquid crystal and the color filter substrate are well-known structures in the industry, they will not be described in detail here.
  • the display panel 200 is not limited to a liquid crystal display panel, and may also be a display panel using quantum dots to emit light.
  • a reflective structure is set between two adjacent light sources, and the surface of the reflective structure facing the light source is set into a concave surface, utilizing the light collection effect of the concave surface. It can collect the light emitted from the sides of two adjacent light sources in all directions, which not only reduces the light crosstalk between the two adjacent light sources, but also improves the light extraction efficiency, reduces the loss of light, and thus improves the picture quality.
  • the reflective mixture by formulating the components of the reflective mixture to make the reflective structure (for example, adding photosensitive substances to reflective ink, the reflective mixture has reflective and photolithographic properties; or directly adding reflective particles to the photoresist; or directly using reflective ink ), and then obtain a concave reflective structure through a photolithography process according to the photosensitive characteristics of the reflective mixture, or directly form multiple stacked reflective layers on the drive substrate through multiple 3D printing processes, and design the stacked reflective layers
  • the characteristic size of the reflective layer from the reflective layer close to the driving substrate to the reflective layer farthest from the driving substrate, the characteristic size of the reflective layer first becomes smaller and then increases) to obtain a reflective structure with a concave surface , the production process is simple.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
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Abstract

本发明提供一种发光板及其制备方法、显示终端，发光板包括驱动基板及光源；发光板还包括：反光结构；一个光源位于相邻的两个反光结构之间；反光结构包括面向光源的第一侧面及第二侧面；第一侧面与第二侧面的一端连接在驱动基板上；及在一个反光结构中，第一侧面及第二侧面均为一凹面，第一侧面与第二侧面相对凹陷。

Description

发光板、发光板的制备方法及显示终端 技术领域
本发明涉及背光显示领域，尤其涉及一种发光板、发光板的制备方法及显示终端。
 背景技术
随着Mini-LED技术的不断成熟，相关技术产品陆续落地，Mini-LED主要在背光和自发光两个方向分别助力液晶显示面板与小间距发光二极管的升级。一种应用是背光方向：主要是用于助力液晶显示面板的显示升级，结合液晶显示面板能够实现光源无边框、区域控制等，帮助传统液晶显示面板提升对比度和清晰度，进而与有机发光二极管性能缩小差距，并且Mini-LED基板作为液晶显示面板的背光的成本较有机发光二极管低，由此能够给予液晶显示面板在中高端市场与有机发光二极管同台竞争的机会。另一种应用是自发光方向：Mini-LED或Micro-LED自发光是小间距发光二极管的升级，由于发光二极管的不断缩小，发光二极管芯片之间存在一定程度的光串扰，影响画面的质量的提升。
 技术问题
发光二极管芯片之间存在一定程度的光串扰，影响画面的质量的提升。
 技术解决方案
有鉴于此，本发明提供一种能够降低光串扰并提升出光效率的发光板及其制备方法。
为解决上述问题，本发明提供的技术方案如下：
第一方面，本发明提供一种发光板，包括驱动基板及多个设置在所述驱动基板上且与所述驱动基板中的电路电连接的光源；所述发光板还包括：多个反光结构，设置在所述驱动基板上；一个所述光源位于相邻的两个反光结构之间；每个所述反光结构包括面向所述光源的第一侧面及一与所述第一侧面相背设置的第二侧面；及在一个所述反光结构中，所述第一侧面及所述第二侧面均为一凹面，所述第一侧面与所述第二侧面相对凹陷。
在本发明一可选实施例中，所述第一侧面及所述第二侧面均为一圆弧面，所述圆弧面的圆心位于面向所述第一侧面设置的所述光源一侧。在本发明一可选实施例中，所述第一侧面及所述第二侧面均由至少两个平面连接而成。
在本发明一可选实施例中，在垂直于所述驱动基板的方向上，所述光源的高度低于所述反光结构的高度。
在本发明一可选实施例中，相邻的两个反光结构之间具有一收容腔，所述光源收容在所述收容腔内，所述收容腔的背离所述驱动基板的一端的开口的特征尺寸大于或等于所述光源在平行于所述驱动基板的方向上的特征尺寸的大小。
在本发明一可选实施例中，在垂直于所述驱动基板的方向上，所述光源的高度等于所述反光结构的高度。
在本发明一可选实施例中，相邻的两个反光结构之间具有一收容腔，所述光源收容在所述收容腔内，所述收容腔的背离所述驱动基板的一端的开口的特征尺寸大于所述光源在平行于所述驱动基板的方向上的特征尺寸的大小。
在本发明一可选实施例中，所述反光结构的材质包括油墨基质和感光基质中至少一种以及分散在所述油墨基质和感光基质中至少一种中的反射粒子。
在本发明一可选实施例中，所述反光结构包括多个在所述驱动基板上层叠设置的反光层，自靠近所述驱动基板的所述反光层到距离所述驱动基板最远的所述反光层，所述反光层在第一方向上的特征尺寸先变小再增大；其中，所述第一方向平行于所述驱动基板且与所述反光结构的所述第一侧面的凹陷方向一致。
在本发明一可选实施例中，所述反射粒子的直径小于10微米。
第二方面，本发明提供一种发光板的制备方法，包括步骤：
制备反光混合物，所述反光混合物包括混合在一起的反射粒子，以及感光物质和油墨基质中的至少一种；
提供一驱动基板，并通过光刻工艺或3D打印工艺对形成在所述驱动基板上的所述反光混合物图案化，以得到多个所述反光结构；相邻的两个所述反光结构的相对的两个侧面为凹面；及
在所述驱动基板上设置多个光源，一个所述光源位于相邻的两个反光结构之间。
在本发明一可选实施例中，当所述反光混合物包括所述反射粒子以及所述感光物质，或当所述反光混合物包括所述反射粒子、所述感光物质及所述油墨基质时，所述反光结构通过光刻工艺或3D打印工艺形成；当所述反光混合物包括所述反射粒子及所述油墨基质时，所述反光结构通过3D打印工艺形成。
在本发明一可选实施例中，所述光刻工艺包括：
在所述驱动基板上涂布所述反光混合物；
对所述反光混合物的与所述驱动基板相贴的一侧及所述反光混合物的背离所述驱动基板的另一侧同时进行第一次加热；
通过曝光及显影制程图案化所述反光混合物；及
对图案化后的所述反光混合物进行二次加热，以得到所述反光结构。
在本发明一可选实施例中，所述3D打印工艺包括：以所述反光混合物作为3D打印的材料在所述驱动基板上进行分次3D打印，以在所述驱动基板上形成多个层叠设置的反光层；自靠近所述驱动基板的所述反光层到距离所述驱动基板的最远的所述反光层，所述反光层在第一方向上的特征尺寸先变小再增大；其中，所述第一方向平行于所述驱动基板且与所述反光结构的所述第一侧面的凹陷方向一致。
第三方面，本发明提供一种显示终端，包括背光模组及显示面板，所述背光模组与所述显示面板相对设置，所述背光模组包括发光板，所述发光板位于所述显示面板的入光侧；其中，所述发光板包括驱动基板及多个设置在所述驱动基板上且与所述驱动基板中的电路电连接的光源；所述发光板还包括：多个反光结构，设置在所述驱动基板上；一个所述光源位于相邻的两个反光结构之间；每个所述反光结构包括面向所述光源的第一侧面及一与所述第一侧面相背设置的第二侧面；及在一个所述反光结构中，所述第一侧面及所述第二侧面均为一凹面，所述第一侧面与所述第二侧面相对凹陷。
在本发明一可选实施例中，所述第一侧面及所述第二侧面均为一圆弧面，所述圆弧面的圆心位于面向所述第一侧面设置的所述光源一侧。
在本发明一可选实施例中，所述第一侧面及所述第二侧面均由至少两个平面连接而成。
在本发明一可选实施例中，在垂直于所述驱动基板的方向上，所述光源的高度低于所述反光结构的高度；相邻的两个反光结构之间具有一收容腔，所述光源收容在所述收容腔内，所述收容腔的背离所述驱动基板的一端的开口的特征尺寸大于或等于所述光源在平行于所述驱动基板的方向上的特征尺寸的大小。
在本发明一可选实施例中，在垂直于所述驱动基板的方向上，所述光源的高度等于所述反光结构的高度，相邻的两个反光结构之间具有一收容腔，所述光源收容在所述收容腔内，所述收容腔的背离所述驱动基板的一端的开口的特征尺寸大于所述光源在平行于所述驱动基板的方向上的特征尺寸的大小。
在本发明一可选实施例中，所述反光结构的材质包括油墨基质和感光基质中至少一种以及分散在所述油墨基质和感光基质中至少一种中的反射粒子。
 有益效果
本发明提供的发光板及发光板的制备方法，在相邻的两个光源之间设置一个反光结构，并将反光结构的面向光源的面设置成凹面，利用凹面的收光效果，能够将相邻两个光源的侧面发出的各个方向的光收集，从而不仅能够减少相邻两个光源之间的光串扰，还能减少光的损失，以提升出光效率，进而提升画面质量。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为本发明第一实施例提供的一种发光板的剖视图。
图2为图1所示的发光板的光线示意图。
图3为本发明第二实施例提供的发光板的反光结构的剖视图。
图4为本发明第三实施例提供的发光板的反光结构的剖视图。
图5为本发明第四实施例提供的发光板的反光结构的剖视图。
图6为本发明较佳实施例提供的一种发光板的制备方法的流程图。
图7为本发明较佳实施例提供的一种显示终端的剖视图。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明的描述中，需要理解的是，术语“上”、“下”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体地限定。
本发明可以在不同实施中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。
以下将结合具体实施例及附图对本发明提供的发光板及发光板的制备方法进行详细描述。
请参阅图1，本发明提供一种发光板100，其中，所述发光板100包括驱动基板10、多个设置在所述驱动基板10上且与所述驱动基板10中的电路电连接的光源20及多个设置在所述驱动基板10上的反光结构30，一个所述光源20位于相邻的两个反光结构30之间。
在一个具体的应用场景中，光源20为Mini LED或者Micro LED，可以直接作为显示光源，此时发光板100为直显面板。
在另一个具体的应用场景中，光源20可以为背光源，此时的发光板100实际上是背光模组的一部分。本发明并不限定所述发光板100的应用场景。
在本发明一可选实施例中，所述发光板100还包括封装层40，所述封装层40形成在所述驱动基板10上且覆盖所述光源20及所述反光结构30。
其中，所述驱动基板10包括衬底(图未示)及形成在所述衬底上的驱动电路层(图未示)，所述驱动电路层与所述光源20电连接，以驱动所述光源20发光。
其中，所述驱动电路层包括至少一驱动晶体管(图未示)，每个所述驱动晶体管包括栅极、有源层及源漏极层，所述有源层与所述栅极位置相对，所述源漏极层与所述有源层位置相对且电连接，所述源漏极层与所述光源20电连接。所述驱动晶体管还包括栅极绝缘层、钝化层及平坦层，所述栅极绝缘层包覆所述有源层，所述钝化层包覆所述源漏极层，所述平坦层形成在所述钝化层上，所述光源20及所述反光结构30形成在所述平坦层上。当然，所述驱动电路层的结构并不局限于上述描述，还可以是其他的结构。具体地，所述驱动晶体管可以为底栅结构、顶栅结构、双栅结构等，可以根据实际情况而定。
在本发明中，所述光源20为发光二极管(Light Emitting Diode，LED)。可知地，所述光源20并不局限于发光二极管，还可以是其他的光源。
其中，在本发明中，所述光源20为红色LED、绿色LED、蓝色LED等中的至少一种。相邻的两个光源20的颜色可以相同，也可以不同。
在本实施例中，相邻的两个光源20的颜色不相同，相邻的三个所述光源20(红色LED、绿色LED、蓝色LED)构成一个发光单元。
其中，所述光源20包括背离所述驱动基板10的第一出光面21及与所述第一出光面21连接的第二出光面22和第三出光面23，所述第二出光面22及所述第三出光面23分别面向所述反光结构30。
在本发明一可选实施例中，所述第二出光面22及所述第三出光面23不相连接且相背设置，此时，所述光源20可以是个多面体结构。与所述反光结构30相对的面也不止所述第二出光面22及所述第三出光面23。
在本发明另一可选实施例中，所述第二出光面22及所述第三出光面23相连接，此时，所述光源20可以是个圆形或部分圆形或椭圆形的结构，所述第二出光面22及所述第三出光面23可以看作是同一个表面。
其中，每个所述反光结构30包括一与所述驱动基板10相贴的第一表面31、与所述第一表面31相背的第二表面32、面向所述光源20的第一侧面33和与所述第一侧面33相背的第二侧面34；所述第一侧面33与所述第二侧面34的一端与所述第一表面31相连接，另一端与所述第二表面32相连接；定义所述第一侧面33及所述第二侧面34之间的最短距离为d1，所述第一侧面33及所述第二侧面34的远离所述驱动基板10的端部之间的距离为d2，所述第一侧面33及所述第二侧面34与所述驱动基板10相接的端部的距离为d3，则d1<d2且d1<d3。
在本实施例中，所述第一侧面33面向所述第三出光面23，所述第二侧面34面向所述第二出光面22。
在本发明一可选实施例中，所述第一侧面33及所述第二侧面34均为一凹面，所述第一侧面33与所述第二侧面34相对凹陷。
在本发明一可选实施例中，所述第一侧面33及所述第二侧面34均为一圆弧面，所述圆弧面的圆心位于面向所述第一侧面33设置的所述光源20一侧。
在本发明一可选实施例中，在垂直于所述驱动基板10的方向上，所述光源20的高度低于所述反光结构30的高度。也即，所述第一出光面21与所述第二表面32之间具有断差，以使得从所述光源20的所述第二出光面22及/或所述第三出光面23在所述第二侧面34及/或所述第一侧面33上经过多次反射后能够从所述第一出光面21与所述第二表面32之间的缝隙中射出，进而能够进一步增加所述光源20的出光效率。
在本发明一可选实施例中，相邻的两个所述反光结构30之间具有一收容腔35，所述光源20收容在所述收容腔35内。当在垂直于所述驱动基板的方向上，所述光源20的高度低于所述反光结构30的高度时，所述收容腔35的背离所述驱动基板10的一端的开口的特征尺寸d5大于或等于所述光源20在平行于所述驱动基板10的方向上的特征尺寸d4的大小。如此，不影响经过反光结构30反射后的侧面光线自所述光源20的正面射出，有利于增加所述光源20的出光效率。
在本发明另一可选实施例中，当在垂直于所述驱动基板的方向上，所述光源20的高度等于所述反光结构30的高度时，所述收容腔35的背离所述驱动基板10的一端的开口的特征尺寸d5大于所述光源20在平行于所述驱动基板10的方向上的特征尺寸d4的大小。如此，不影响经过反光结构30反射后的侧面光线自所述光源20的正面射出，有利于增加所述光源20的出光效率。
在本发明一可选实施例中，所述反光结构30的材质包括油墨基质(图未示)和感光基质(图未示)中至少一种以及分散在所述油墨基质和感光基质中至少一种中的反射粒子(图未示)。
其中，所述油墨基质可以为现有技术中提到的常规油墨的成分。所述感光基质可以是现有技术中提到的常规光刻胶的成分。当然，所述油墨基质和所述感光基质并不只局限于现有技术中提到的常规油墨的成分和现有技术中提到的常规光刻胶的成分，还可以根据实际情况进行调配的成分。
具体地，在本发明一可选实施例中，所述感光基质由所述感光物质经光固化形成，所述感光物质使得所述反光结构具有感光特性，所述反射粒子使得所述反光结构具有反光特性，如此，可以通过光刻工艺形成所述反光结构。
具体地，所述感光物质包括感光树脂、活性稀释剂及光引发剂及其他助剂等。具体地，在本实施例中，所述感光树脂为重氮醌树脂，所述活性稀释剂为丙二醇-甲基乙醚(1-methoxy-2-propanol，PGME)，所述助剂为防结皮剂、防反印剂、增滑剂等。当然，所述感光树脂的种类并不局限于重氮醌树脂，所述活性稀释剂的种类并不局限于PGME，可以根据实际情况进行选择。
具体地，所述油墨基质可以包括树脂基体(连接料)、颜料、填料、助剂及溶剂等。因现有技术中的油墨配方很多，在这里不再一一赘述。
其中，所述反射粒子可以是高反射率的铝、银等金属的单质或化合物，也可以是高反射率的玻璃和珠光材料等。
在本发明中，所述反射粒子的直径小于10微米。
在本发明中，所述反射粒子的形状可以是球形、椭球形、锥柱形、棱柱形、圆柱形、不规则棱形等。
请参阅图2，从所述第二出光面22或所述第三出光面23射出的部分光线L1可以直接从所述反光结构30的所述第二表面32与所述第一侧面33或第二侧面34相交的位置处射出，该位置射出的光线L1为所述光源20的出光光线的边界光线，所述光源20的出光光范围取决于所述反光结构30的高度。从所述第二出光面22或所述第三出光面23射出的部分光线L2可以在所述反光结构30的所述第一侧面33或第二侧面34上发生一次反射后射出。从所述第二出光面22或所述第三出光面23射出的部分光线L3可以在所述反光结构30的所述第一侧面33或第二侧面34以及所述光源20的所述第二出光面22或所述第三出光面23上发生多次反射后射出。从所述第一出光面21射出的部分光线L4可以在所述反光结构30的所述第一侧面33或第二侧面34以及所述光源20的所述第二出光面22或所述第三出光面23上发生多次反射后射出。
请参阅图1及图3，本发明第二实施例提供一种反光结构50，所述反光结构50与所述反光结构30的结构相似，其区别仅在于，所述反光结构50包括多个在所述驱动基板10上层叠设置的反光层，自靠近所述驱动基板10的所述反光层到距离所述驱动基板最远的所述反光层，所述反光层在第一方向D1上的特征尺寸先变小再增大。其中，所述第一方向D1平行于所述驱动基板10且与所述反光结构30的所述第一侧面33的凹陷方向一致。
相应地，所述反光结构50可以通过3D打印工艺形成。所述反光结构50的材质可以包括油墨基质和感光基质中至少一种以及分散在所述油墨基质和感光基质中至少一种中的反射粒子。也即，通过3D打印工艺形成所述反光结构50时，不局限于所述反光结构50的材质是否包括感光基质。
请参阅图4，本发明第三实施例提供一种反光结构60，所述反光结构60与所述反光结构30的结构相似，其区别仅在于，所述反光结构60的所述第一侧面63及所述第二侧面64均由多个平面连接而成。也即，所述反光结构60的所述第一侧面63及所述第二侧面64不是平滑的圆弧面。
请参阅图5，本发明第四实施例提供一种反光结构70，所述反光结构70与所述反光结构30的结构相似，其区别仅在于，所述反光结构70的所述第一侧面73及所述第二侧面74均由两个平面连接而成。
请参阅图1、图3及图6，本发明还提供一种发光板的制备方法，包括步骤：
S1：制备反光混合物，所述反光混合物包括混合在一起的反射粒子以及感光物质和油墨基质中的至少一种；
S2：提供一驱动基板10，并通过光刻工艺或3D打印工艺对形成在所述驱动基板10上的所述反光混合物图案化，以得到多个所述反光结构；相邻的两个所述反光结构的相对的两个侧面为凹面；及
S3：在所述驱动基板10上设置多个光源20，一个所述光源20位于相邻的两个反光结构30或50之间。
在本发明一可选实施例中，所述反光结构30的材质包括油墨基质(图未示)和感光基质(图未示)中至少一种以及分散在所述油墨基质和感光基质中至少一种中的反射粒子(图未示)。所述感光基质由所述感光物质经光固化形成。
所述反光混合物可以将反射粒子以及油墨基质(图未示)和感光物质中至少一种直接混合到一起得到，也可以将所述感光物质加入到反光油墨(包括反射粒子和油墨基质)中得到。
其中，所述油墨基质可以为现有技术中提到的常规油墨的成分。所述感光物质可以是现有技术中提到的常规光刻胶的成分。当然，所述油墨基质和所述感光基质并不只局限于现有技术中提到的常规油墨的成分和现有技术中提到的常规光刻胶的成分，还可以根据实际情况进行调配的成分。
具体地，在本发明一可选实施例中，所述感光物质使得所述反光结构具有感光特性，所述反射粒子使得所述反光结构具有反光特性，如此，可以通过光刻工艺形成所述反光结构。
具体地，所述感光物质包括感光树脂、活性稀释剂及光引发剂及其他助剂等。具体地，在本实施例中，所述感光树脂为重氮醌树脂，所述活性稀释剂为丙二醇-甲基乙醚(1-methoxy-2-propanol，PGME)，所述助剂为防结皮剂、防反印剂、增滑剂等。当然，所述感光树脂的种类并不局限于重氮醌树脂，所述活性稀释剂的种类并不局限于PGME，可以根据实际情况进行选择。
具体地，所述油墨基质可以包括树脂基体(连接料)、颜料、填料、助剂及溶剂等。因现有技术中的油墨配方很多，在这里不再一一赘述。
其中，所述反射粒子可以是高反射率的铝、银等金属的单质或化合物，也可以是高反射率的玻璃和珠光材料等。
在本发明中，所述反射粒子的直径小于10微米。
在本发明中，所述反射粒子的形状可以是球形、椭球形、锥柱形、棱柱形、圆柱形、不规则棱形等。
在本发明一可选实施例中，当所述反光混合物包括所述反射粒子以及所述感光物质，或当所述反光混合物包括所述反射粒子、所述感光物质及所述油墨基质时，所述反光结构可以通过光刻工艺或3D打印工艺形成；当所述反光混合物包括所述反射粒子及所述油墨基质时，所述反光结构可以通过3D打印工艺形成。
在本发明一可选实施例中，所述光刻工艺包括：在所述驱动基板10上涂布所述反光混合物；对所述反光混合物的与所述驱动基板10相贴的一侧及所述反光混合物的背离所述驱动基板10的另一侧同时进行第一次加热；及通过曝光及显影制程图案化所述反光混合物；对图案化后的所述反光混合物进行二次加热，以得到所述反光结构30。
在本发明一可选实施例中，所述第一次加热可以通过红外加热的方式，利用红外光源同时照射驱动基板10背离反光混合物的一侧以及反光混合物背离驱动基板10的一侧，通过红外加热的穿透性，来对反光混合物靠近驱动基板10的一侧以及背离驱动基板10的一侧同时进行第一次加热。为了便于红外光线穿透驱动基板10进而对反光混合物靠近驱动基板10的一侧进行加热，驱动基板10应该优选透明基板或者透光基板。
具体地，当通过光刻工艺形成所述反光结构30时，所述反光混合物必须包括感光物质。
其中，步骤“对所述反光混合物的与所述驱动基板10相贴的一侧及所述反光混合物的背离所述驱动基板10的另一侧同时进行第一次加热”可以对所述反光混合物进行一个预固化，溶剂含量减少且部分分子发生一定的预交联反应，预交联反应提高了所述反光混合物的与所述驱动基板10相贴合的一侧及背离所述驱动基板10的另一侧的耐刻蚀性能，而混合物中间部分发生预交联反应的分子较少，耐刻蚀性能低于所述反光混合物两端的耐刻蚀性能，从而，在后续曝光显影制程中，所述反光混合物的与所述驱动基板10相贴合的一侧及背离所述驱动基板10的另一侧的被刻蚀程度低于所述反光混合物的中间部分的被刻蚀程度，从而有利于形成凹面(第一侧面33和第二侧面34)。
其中，对图案化后的所述反光混合物进行二次加热可以彻底固化所述反光结构30。具体地，第二次加热的温度大于第一次加热的温度。
在本发明一可选实施例中，所述3D打印工艺包括：以所述反光混合物作为3D打印的材料在所述驱动基板10上进行分次3D打印，以在所述驱动基板10上形成多个层叠设置的反光层；自靠近所述驱动基板10的所述反光层到距离所述驱动基板10最远的所述反光层，所述反光层的特征尺寸先变小再增大。其中，所述反光层的特征尺寸是指每个所述反光层的在第一方向D1上的尺寸。其中，所述第一方向D1平行于所述驱动基板10且与所述反光结构的第一侧面33的凹陷方向一致。具体地，现在所述驱动基板10通过3D打印技术形成底端反光层36，再在底端反光层36上形成中间反光层37，再在中间反光层37上形成顶端反光层38。其中，底端反光层36、中间反光层37及顶端反光层38包括一层或多层反光膜。
具体地，当通过3D打印工艺形成所述反光结构30时，所述反光混合物中可以包括感光物质，也可以不包括感光物质。所述反光混合物中还可以加入快速固化剂(例如：光固化剂等)，以使得打印后快速定型；在固化之后，所述感光物质变为感光基质。
请参阅图7，本发明还提供一种显示终端1000，所述显示终端1000包括所述背光模组及显示面板200。所述背光模组与所述显示面板200相对设置，所述背光模组包括如上所述的发光板100，所述发光板100位于所述显示面板200的入光侧。其中，所述显示面板200可以是液晶显示面板，所述显示面板200包括阵列基板、液晶及彩膜基板，所述阵列基板与所述彩膜基板相对设置，所述液晶夹设在所述阵列基板与所述彩膜基板之间。由于所述液晶及所述彩膜基板均为业界习知的结构，在此不再一一赘述。当然，所述显示面板200并不局限于液晶显示面板，还可以是量子点发光的显示面板等。
本发明提供的发光板、发光板的制备方法及显示终端，在相邻的两个光源之间设置一个反光结构，并将反光结构的面向光源的面设置成凹面，利用凹面的收光效果，能够将相邻两个光源的侧面发出的各个方向的光收集，从而不仅能够减少相邻两个光源之间的光串扰，还能提升出光效率，减少光的损失，进而能够提升画面质量。另外，通过调配制作反光结构的反光混合物的成分(例如：在反光油墨中加入感光物质，使得反光混合物具有了反光和光刻特性；或者直接在光刻胶中加入反射粒子；或者直接使用反光油墨)，再根据反光混合物的感光特性通过光刻工艺得到具有凹面的反光结构，或者直接通过多次3D打印工艺在所述驱动基板上形成多个层叠设置的反光层，并通过设计层叠的反光层的特征尺寸(自靠近所述驱动基板的所述反光层到距离所述驱动基板的最远的所述反光层，所述反光层的特征尺寸先变小再增大)得到具有凹面的反光结构，制作工艺简单。
以上对本发明实施例所提供的显示装置及显示装置的制备方法进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例的技术方案的范围。

Claims (20)

  1. 一种发光板，包括驱动基板及多个设置在所述驱动基板上且与所述驱动基板中的电路电连接的光源；其中，所述发光板还包括：
    多个反光结构，设置在所述驱动基板上；
    一个所述光源位于相邻的两个反光结构之间；每个所述反光结构包括面向所述光源的第一侧面及一与所述第一侧面相背设置的第二侧面；所述第一侧面与所述第二侧面的一端连接在所述驱动基板上；及
    在一个所述反光结构中，所述第一侧面及所述第二侧面均为一凹面，所述第一侧面与所述第二侧面相对凹陷。
  2. 如权利要求1所述的发光板，其中，所述第一侧面及所述第二侧面均为一圆弧面，所述圆弧面的圆心位于面向所述第一侧面设置的所述光源一侧。
  3. 如权利要求1所述的发光板，其中，所述第一侧面及所述第二侧面均由至少两个平面连接而成。
  4. 如权利要求1所述的发光板，其中，在垂直于所述驱动基板的方向上，所述光源的高度低于所述反光结构的高度。
  5. 如权利要求4所述的发光板，其中，相邻的两个反光结构之间具有一收容腔，所述光源收容在所述收容腔内，所述收容腔的背离所述驱动基板的一端的开口的特征尺寸大于或等于所述光源在平行于所述驱动基板的方向上的特征尺寸的大小。
  6. 如权利要求1所述的发光板，其中，在垂直于所述驱动基板的方向上，所述光源的高度等于所述反光结构的高度。
  7. 如权利要求6所述的发光板，其中，相邻的两个反光结构之间具有一收容腔，所述光源收容在所述收容腔内，所述收容腔的背离所述驱动基板的一端的开口的特征尺寸大于所述光源在平行于所述驱动基板的方向上的特征尺寸的大小。
  8. 如权利要求1所述的发光板，其中，所述反光结构的材质包括油墨基质和感光基质中至少一种以及分散在所述油墨基质和感光基质中至少一种中的反射粒子。
  9. 如权利要求8所述的发光板，其中，所述反光结构包括多个在所述驱动基板上层叠设置的反光层，自靠近所述驱动基板的所述反光层到距离所述驱动基板最远的所述反光层，所述反光层在第一方向上的特征尺寸先变小再增大；其中，所述第一方向平行于所述驱动基板且与所述反光结构的所述第一侧面的凹陷方向一致。
  10. 如权利要求8所述的发光板，其中，所述反射粒子的直径小于10微米。
  11. 一种发光板的制备方法，其中，包括步骤：
    制备反光混合物，所述反光混合物包括混合在一起的反射粒子，以及感光物质和油墨基质中的至少一种；
    提供一驱动基板，并通过光刻工艺或3D打印工艺对形成在所述驱动基板上的所述反光混合物图案化，以得到多个所述反光结构；相邻的两个所述反光结构的相对的第一侧面和第二侧面为凹面；及
    在所述驱动基板上设置多个光源，一个所述光源位于相邻的两个反光结构之间。
  12. 如权利要求11所述的发光板的制备方法，其中，当所述反光混合物包括所述反射粒子以及所述感光物质，或当所述反光混合物包括所述反射粒子、所述感光物质及所述油墨基质时，所述反光结构通过光刻工艺或3D打印工艺形成；当所述反光混合物包括所述反射粒子及所述油墨基质时，所述反光结构通过3D打印工艺形成。
  13. 如权利要求12所述的发光板的制备方法，其中，所述光刻工艺包括：
    在所述驱动基板上涂布所述反光混合物；
    对所述反光混合物的与所述驱动基板相贴的一侧及所述反光混合物的背离所述驱动基板的另一侧同时进行第一次加热；
    通过曝光及显影制程图案化所述反光混合物；及
    对图案化后的所述反光混合物进行二次加热，以得到所述反光结构。
  14. 如权利要求12所述的发光板的制备方法，其中，所述3D打印工艺包括：以所述反光混合物作为3D打印的材料在所述驱动基板上进行分次3D打印，以在所述驱动基板上形成多个层叠设置的反光层；自靠近所述驱动基板的所述反光层到距离所述驱动基板的最远的所述反光层，所述反光层在第一方向上的特征尺寸先变小再增大；其中，所述第一方向平行于所述驱动基板且与所述反光结构的所述第一侧面的凹陷方向一致。
  15. 一种显示终端，包括背光模组及显示面板，所述背光模组与所述显示面板相对设置，所述背光模组包括发光板，所述发光板位于所述显示面板的入光侧；其中，所述发光板包括驱动基板及多个设置在所述驱动基板上且与所述驱动基板中的电路电连接的光源；所述发光板还包括：
    多个反光结构，设置在所述驱动基板上；
    一个所述光源位于相邻的两个反光结构之间；每个所述反光结构包括面向所述光源的第一侧面及一与所述第一侧面相背设置的第二侧面；及
    在一个所述反光结构中，所述第一侧面及所述第二侧面均为一凹面，所述第一侧面与所述第二侧面相对凹陷。
  16. 如权利要求15所述的显示终端，其中，所述第一侧面及所述第二侧面均为一圆弧面，所述圆弧面的圆心位于面向所述第一侧面设置的所述光源一侧。
  17. 如权利要求15所述的显示终端，其中，所述第一侧面及所述第二侧面均由至少两个平面连接而成。
  18. 如权利要求15所述的显示终端，其中，在垂直于所述驱动基板的方向上，所述光源的高度低于所述反光结构的高度；相邻的两个反光结构之间具有一收容腔，所述光源收容在所述收容腔内，所述收容腔的背离所述驱动基板的一端的开口的特征尺寸大于或等于所述光源在平行于所述驱动基板的方向上的特征尺寸的大小。
  19. 如权利要求15所述的显示终端，其中，在垂直于所述驱动基板的方向上，所述光源的高度等于所述反光结构的高度，相邻的两个反光结构之间具有一收容腔，所述光源收容在所述收容腔内，所述收容腔的背离所述驱动基板的一端的开口的特征尺寸大于所述光源在平行于所述驱动基板的方向上的特征尺寸的大小。
  20. 如权利要求15所述的显示终端，其中，所述反光结构的材质包括油墨基质和感光基质中至少一种以及分散在所述油墨基质和感光基质中至少一种中的反射粒子。
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