WO2023109197A1 - 反射纸、背光模组及显示装置 - Google Patents

反射纸、背光模组及显示装置 Download PDF

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Publication number
WO2023109197A1
WO2023109197A1 PCT/CN2022/116616 CN2022116616W WO2023109197A1 WO 2023109197 A1 WO2023109197 A1 WO 2023109197A1 CN 2022116616 W CN2022116616 W CN 2022116616W WO 2023109197 A1 WO2023109197 A1 WO 2023109197A1
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WO
WIPO (PCT)
Prior art keywords
reflective paper
reflective
coating layer
layer
paper according
Prior art date
Application number
PCT/CN2022/116616
Other languages
English (en)
French (fr)
Inventor
纪璇
卯小亮
刘小勇
Original Assignee
荣耀终端有限公司
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.)
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Publication date
Application filed by 荣耀终端有限公司 filed Critical 荣耀终端有限公司
Priority to EP22905953.0A priority Critical patent/EP4321927A1/en
Publication of WO2023109197A1 publication Critical patent/WO2023109197A1/zh

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    • 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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity

Definitions

  • the present application relates to the field of display technology, in particular, to reflective paper, a backlight module using the reflective paper, and a display device using the backlight module.
  • the first aspect of the present application provides a reflective paper to solve the problem that the edges of the reflective paper collapse or bulge in the existing direct-lit backlight modules.
  • This reflective paper includes:
  • the reflective layer includes a bottom and an inclined portion extending around the bottom, there is a fold line between the inclined portion and the bottom, when the reflective paper is folded along the fold line, the inclined portion is inclined toward the side away from the bottom along the peripheral edge of the bottom, the bottom and the inclined Parts cooperate to form an accommodating space, the bottom is provided with a plurality of through holes at intervals, the inclined part includes a front facing the accommodating space and a back opposite to the front, the front is used to reflect light; and
  • the coating layer is arranged on the reflective layer to increase the stiffness of the reflective paper.
  • the reflection layer on the reflection layer by setting the coating layer on the reflection layer to increase the stiffness of the reflection paper (that is, the stiffness of the reflection layer provided with the coating layer is greater than the stiffness of the reflection layer itself), the reflection The effective support of the inclined part of the paper can effectively improve the problem of edge collapse or edge bulging of the reflective paper, and further improve the display effect of the display device using it.
  • the material of the coating layer is transparent cured glue, and the transparent cured glue is arranged on the back and/or the front.
  • the material of the coating layer is white cured glue, and the white cured glue is arranged on the back side.
  • the white curing glue is, for example, white latex.
  • the transparent curing adhesive is, for example, an ultraviolet curing adhesive. After the transparent curing adhesive is coated and cured, it can effectively increase the stiffness of the reflective paper. At the same time, because the transparent curing adhesive has better light transmittance, even if the transparent curing adhesive is placed on the front of the inclined part of the reflective layer, it will not affect the reflection. Normal function of the front side of the paper.
  • both the transparent curing glue and the white curing glue can be installed on the back of the inclined part to increase the stiffness of the reflective paper and effectively improve the problem of bulging of the reflective paper and the collapse of the inclined part.
  • the back side is also guaranteed not to interfere with the functionality of the front side of the reflective paper.
  • the coating layer is provided on the inclined portion, not on the entire surface of the reflective layer, so the material cost of the coating layer can be effectively reduced.
  • the coating layer has a thickness of 50 ⁇ m ⁇ 200 ⁇ m.
  • the thickness of the coating layer is 50 ⁇ m to 80 ⁇ m, 80 ⁇ m to 100 ⁇ m, 100 ⁇ m to 120 ⁇ m, 120 ⁇ m to 150 ⁇ m, 150 ⁇ m to 180 ⁇ m, and 180 ⁇ m to 200 ⁇ m.
  • the thicker the thickness of the coating layer the better the stiffness of the position of the reflective paper corresponding to the coating layer; the thinner the thickness of the coating layer, the material cost of the coating layer can be reduced.
  • the coating layer partially covers the reflective layer; or, the coating layer completely covers the reflective layer.
  • the coating layer completely covers the reflective layer which can maximize the area of the coating layer and improve the stiffness of the reflective paper.
  • the coating layer partially covers the reflective layer. On the one hand, it can ensure the stiffness of the reflective paper; on the other hand, it reduces the process and saves materials.
  • the coating layer completely covers the reflective layer
  • the reflective paper further includes an adhesive tape, and the adhesive tape is attached to a side of the coating layer away from the reflective layer.
  • the adhesive tape is completely covered on the side of the coating layer away from the reflective layer by one sticking, the process is simple and the process time is saved; or, multiple tapes are attached at intervals on the side of the coating layer away from the reflective layer to save material costs .
  • the coating layer partially covers the reflective layer, and the reflective paper also includes an adhesive tape, which is set on the same layer as the coating layer, and the adhesive tape is attached to the reflective layer without covering the The position of the coating layer.
  • the reflective paper further includes a support structure, and the support structure includes a fixed surface fixed on one side of the back, a support surface connected to the fixed surface and forming a first preset angle with the back, and a support surface connected to the fixed surface and formed at a first preset angle with the back.
  • the transition surface of the second preset included angle is close to or equal to 90 degrees, and the supporting surface is approximately perpendicular to the fixing surface, which mainly supports the reflective layer.
  • the fixing surface, the supporting surface and the transition surface enclose a triangle.
  • the support structure with triangular cross-section has stable support and simple structure.
  • the triangle is a right triangle, which can better support the reflective layer.
  • the supporting structure further includes a fitting surface connecting the transitional surface and the supporting surface.
  • the bonding surface is used for bonding with the back panel (for example, the bonding surface and the side panel of the back panel are bonded through an adhesive layer) to increase the supporting effect of the support structure on the reflective layer and prevent the reflective paper from collapsing during assembly .
  • the fixed surface, the supporting surface, the fitting surface and the transition surface are surrounded by a right-angled trapezoid
  • the fixing surface is the long side of the right-angled trapezoid
  • the fitting surface is The short side of a right-angled trapezoid.
  • the support structure is roughly rectangular in shape.
  • the support structure further includes a first extension surface connected to the support surface and extending to cover the back surface, and a second extension surface connected to the transition surface and extending to cover the back surface.
  • the first extension surface and the second extension surface are formed on the reflective layer by pressing, so as to effectively transition the connection between the support structure and the reflective layer, avoid affecting the front effect of the reflective paper, and maintain the support structure to the reflective layer more. The stability of the support.
  • the first preset included angle ranges from 10 degrees to 90 degrees
  • the second preset included angle ranges from 10 degrees to 90 degrees.
  • the range of the first preset included angle is 10 degrees to 20 degrees, 20 degrees to 30 degrees, 30 degrees to 40 degrees, 40 degrees to 50 degrees, 50 degrees to 60 degrees, 60 degrees to 70 degrees, 70 degrees to 80 degrees, 80 degrees to 90 degrees.
  • the second preset included angle ranges from 10° to 20°, 20° to 30°, 30° to 40°, 40° to 50°, 50° to 60°, 60° to 70°, and 70° to 80° , 80 degrees to 90 degrees.
  • one of the first preset included angle and the second preset included angle is close to 90 degrees, so as to mainly support the reflective layer.
  • the first preset included angle is close to or equal to 90 degrees
  • the supporting surface is approximately perpendicular to the fixing surface; the larger the second preset included angle, the smaller the area of the transition surface and the larger the area of the fitting surface.
  • the fit between the fitting surface and the back plate is more stable.
  • the quadrangle formed by the fixed surface, the supporting surface, the fitting surface, and the transition surface is closer to the Rectangular, the greater the mechanical strength of the support structure, the more stable the support for the reflective layer.
  • the side plate When the fixed surface and the supporting surface are fixed, the smaller the second preset included angle, the larger the area of the transition surface, and the smoother the connection between the supporting structure and the reflective layer, which can effectively avoid the overlapping of the emission paper to the backplane After putting it on, at the support structure, the side plate will give the support structure a supporting force towards the reflective layer, resulting in the problem that the reflective layer at the support structure protrudes.
  • the setting of the first preset angle and the second preset angle also needs to consider the adjustment of the reflection effect of the reflective layer on the light emitted by the light-emitting element, so as to ensure that the support structure supports the reflective layer stably. Optimum light reflection efficiency to light emitting elements.
  • the support structure includes an organic substrate and a plurality of inorganic particles dispersed in the organic substrate.
  • the material of the organic substrate is, for example, PET, but not limited thereto.
  • Inorganic particles are, for example, zirconia, niobium oxide, silicon oxide, etc., but are not limited thereto. Among them, dispersing inorganic particles in the organic substrate can increase the stiffness of the support structure on the one hand, and on the other hand, the inorganic particles can refract or reflect light, so as to facilitate the convergence of light toward the side of the liquid crystal display panel and improve the utilization of light. Rate.
  • the thickness of the organic substrate is 50 ⁇ m ⁇ 300 ⁇ m.
  • the thickness of the organic substrate is, for example, 50 ⁇ m to 80 ⁇ m, 80 ⁇ m to 120 ⁇ m, 120 ⁇ m to 150 ⁇ m, 150 ⁇ m to 200 ⁇ m, 200 ⁇ m to 250 ⁇ m, or 250 ⁇ m to 300 ⁇ m.
  • the thickness of the organic substrate can be selected according to the structure of the backboard matched with the reflective paper, at least to ensure that the reflective paper obtained by laminating the organic substrate and the reflective layer, after lapping with the backboard, the support structure is against the backboard , rather than floating relative to the backplane.
  • the thickness of the organic substrate is roughly uniform before being laminated with the reflective layer.
  • the thickness of a local area of the organic substrate becomes smaller after being laminated with the reflective layer, forming a first extension. face and the second extended face.
  • the thickness of the organic substrate is 50 ⁇ m to 300 ⁇ m, referring to the thickness before the organic substrate and the reflective layer are laminated.
  • the second aspect of the present application provides a backlight module, which includes:
  • the back plate includes a bottom plate and a side plate that surrounds the bottom plate and extends obliquely toward a side away from the bottom plate along the peripheral edge of the bottom plate;
  • the inclined part overlaps the side plate, the bottom position corresponds to the bottom plate, and each light-emitting element is exposed through a through hole and is located in the accommodating space of the reflective paper.
  • the backlight module is a direct type module, and because it includes the reflective paper of the first aspect of the application, the emitted backlight is uniform.
  • the support structure bears against the side panels to support the reflective layer.
  • the supporting degree of the reflective paper and the backboard in the surrounding gap can be effectively increased without affecting the normal function of the front of the reflective paper, so as to effectively improve the problem of bulging of the reflective paper and the collapse of the slope.
  • the adhering surface and the side panel are attached through an adhesive layer, so as to further enhance the stability of the supporting structure for supporting the reflective layer.
  • a third aspect of the present application provides a display device, which includes:
  • the backlight module according to the second aspect of the present application, wherein the backlight module is located on the side of the liquid crystal display panel away from its display surface.
  • the display device Since the backlight emitted by the backlight module of the second aspect is uniform, the display device does not have the problem of bright and dark spots caused by the collapse or swelling of the reflective paper, and the display effect is good.
  • FIG. 1 is a schematic structural diagram of a display device according to an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of the reflective paper in FIG. 1 .
  • FIG. 3 is a schematic structural diagram of reflective paper according to another embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of reflective paper according to yet another embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a display device according to another embodiment of the present application.
  • FIG. 6 is a schematic view of the front side of the reflective paper in FIG. 5 .
  • FIG. 7 is a schematic diagram of the back side of the reflective paper in FIG. 5 .
  • FIG. 8 is a schematic structural diagram of a display device according to yet another embodiment of the present application.
  • FIG. 9 is a schematic view of the front side of the reflective paper in FIG. 8 .
  • FIG. 10 is a schematic diagram of the back side of the reflective paper in FIG. 8 .
  • the first inclined part 5121 is the first inclined part 5121
  • FIG. 1 is a schematic structural diagram of a display device 100a according to an embodiment of the present application.
  • the display device 100a is, for example, a monitor, a notebook computer, a television, and the like. As shown in FIG. 1 , the display device 100 a includes a liquid crystal display panel 10 , a buffer layer 20 , a middle frame 30 and a backlight module 40 .
  • the liquid crystal display panel 10 is used to display images.
  • the backlight module 40 is located on the side of the liquid crystal display panel 10 away from its display surface, and is a direct type backlight module for providing backlight to the liquid crystal display panel 10 .
  • the middle frame 30 is used to carry the liquid crystal display panel 10 and connect to the backlight module 40 .
  • the middle frame 30 includes a carrying surface 31 on which the liquid crystal display panel 10 is mounted.
  • the buffer layer 20 is disposed on the bearing surface 31 and located between the liquid crystal display panel 10 and the middle frame 30 .
  • the buffer layer 20 is roughly ring-shaped, and the buffer layer 20 can be attached to the middle frame 30 and the liquid crystal display panel 10 through double-sided adhesive tape (not shown).
  • the material of the buffer layer 20 is, for example, black foam.
  • the black foam is light-absorbing, which can prevent the light from the backlight module 40 from leaking from the junction of the liquid crystal display panel 10 and the middle frame 30 , and improve the problem of light leakage.
  • the black foam can act as a buffer to prevent the liquid crystal display panel 10 from being squeezed or collided during transportation, causing the array substrate of the liquid crystal display panel 10 to break and fail.
  • the backlight module 40 includes a backplane 41, a circuit board 42 on the backplane 41, a plurality of light-emitting elements 43 on the circuit board 42 and electrically connected to the circuit board 42, and a side of the backplane 41 close to the liquid crystal display panel 10.
  • the back plate 41 is, for example, made of metal to have better mechanical strength.
  • the circuit board 42 is, for example, a rigid circuit board, a flexible circuit board or a rigid-flex board.
  • the light emitting element 43 is used to emit light beams, and it is, for example, a light emitting diode (Light Emitting Diode, LED) lamp bead.
  • the reflective paper 50a is overlapped on the back plate 41 for reflecting the light of the light-emitting element 43 towards the direction of the liquid crystal display panel 10 to increase the utilization rate of the light.
  • the diffusion plate 44 is used to uniformly diffuse light incident thereon.
  • the optical film group 45 includes, for example, a brightness enhancement film, a light guide plate, etc. that are sequentially stacked along a direction away from the liquid crystal display panel 10 , but is not limited thereto.
  • the backboard 41 includes a bottom board 411 and a side board 412 that surrounds the bottom board 411 and extends obliquely along a peripheral edge of the bottom board 411 toward a side away from the bottom board 411 .
  • the side plate 412 includes a bent portion 412 a , a bearing portion 412 b and a locking portion 412 c extending from the bottom plate 411 in sequence.
  • the middle frame 30 is provided with a locking slot 32 , the locking portion 412 c is matched with the locking slot 32 , and the locking portion 412 c is locked into the locking slot 32 , so that the middle frame 30 is locked to the backplane 41 .
  • the middle frame 30 and the side plate 412 may be screwed, but not limited thereto.
  • the carrying part 412b is used for carrying the reflective paper 50a, the diffuser plate 44, the optical film set 45, and the like.
  • the bottom plate 411 of the back plate 41 and the side plates 412 of the back plate 41 surround and form a space with a substantially trapezoidal cross section.
  • the circuit board 42, the light emitting element 43 and the reflective paper 50a are all located in the trapezoidal space.
  • the circuit board 42 is located on the base plate 411 .
  • the reflective paper 50 a includes a reflective layer 51 and a coating layer 52 .
  • the material of the reflective layer 51 is, for example, polyethylene terephthalate (polyethylene glycol terephthalate, PET), but not limited thereto.
  • the reflective layer 51 includes a bottom 511 and an inclined portion 512 extending around the bottom 511 .
  • the bottom 511 is flat, and there is a folding line L (shown in FIG. 2 ) between the bottom 511 and the inclined portion 512 of the reflective paper 50a.
  • the folding line L is, for example, a saddle line.
  • the inclined portion 512 is inclined toward the side away from the bottom 511 along the peripheral edge of the bottom 511, and the bottom 511 and the inclined portion 512 cooperate to form an accommodating space S.
  • the position of the bottom 511 of the reflective paper 50a is set corresponding to the bottom plate 411 of the back plate 41 .
  • the bottom 511 of the reflective paper 50a is provided with a plurality of through holes 511a at intervals.
  • the shapes and sizes of the plurality of through holes 511 a match the plurality of light emitting elements 43 .
  • Each light emitting element 43 is exposed from a through hole 511 a and is located in the accommodating space S.
  • the inclined portion 512 of the reflective paper 50 a is mounted on the side plate 412 of the back plate 41 , and a gap G is formed between the inclined portion 512 of the reflective layer 51 and the bent portion 412 a of the back plate 41 .
  • the inclined portion 512 of the reflective paper 50a and the carrying portion 412b of the backboard 41 may be bonded by double-sided tape or adhesive, but not limited thereto.
  • the suspended area of the large-size display device is large, and it will also cause edge collapse in scenarios such as abnormal transportation and vibration, which seriously affects the display effect.
  • a A reflective paper with enhanced edge design in order to improve the problem that the edge of the reflective paper collapses or the edge bulges when the reflective paper is assembled with the backplane or in abnormal transportation, vibration and other scenarios in the direct-type backlight module, a A reflective paper with enhanced edge design.
  • the inclined portion 512 of the reflective paper 50a includes a front 512a close to the liquid crystal display panel 10 (or facing the accommodating space S) for reflecting light and a back 512b opposite to the front 512a.
  • the coating layer 52 is disposed on the back surface 512 b of the reflective layer 51 .
  • the coating layer 52 is made of transparent cured glue or white cured glue. After being coated and cured, it can effectively increase the stiffness of the reflective paper 50a without affecting the normal function of the front surface 512a of the reflective paper 50a. In this way, problems such as swelling of the reflective paper 50 a and collapse of the inclined portion 512 can be effectively improved.
  • the coating layer 52 is a transparent cured glue, it is not limited to be disposed on the back side 512 b of the inclined portion 512 , and it can also be disposed on the front side 512 a of the inclined portion 512 .
  • the transparent curing glue can effectively increase the stiffness of the reflective paper.
  • the coating layer 52 is disposed on the inclined portion 512 , not on the entire surface of the reflective layer 51 , so the material cost of the coating layer 52 can be effectively reduced.
  • the coating layer 52 is not limited to be disposed on the inclined portion.
  • the coating layer 52 can also be arranged on the front and/or bottom of the bottom for reflecting light; Next, the coating layer 52 can also be provided on the back side of the bottom.
  • the coating layer 52 is arranged on the surface of the same side of the bottom and the slope (such as, the front of the bottom and the front of the slope of the coating layer 52, or the back of the bottom and the slope of the coating layer 52).
  • the back side of the film), the coating layer at the slope and the bottom can be formed simultaneously in one process to simplify the process.
  • the stiffness of the entire reflective paper can be enhanced.
  • the transparent curing adhesive is, for example, an ultraviolet curing acrylic adhesive or a room temperature curing transparent epoxy resin adhesive, but is not limited thereto.
  • the UV-curable acrylate adhesive can quickly (within a few seconds) change from liquid to solid after being irradiated by UV light, and the curing rate is fast, which is beneficial to save process time and improve production efficiency.
  • the UV-curable acrylate adhesive after the UV-curable acrylate adhesive is cured, it has a high light transmittance (greater than or equal to 90%), which allows most of the light to enter the reflective layer and be reflected by the reflective layer to improve the reflective paper. The utilization rate of the light source.
  • the UV-curable acrylic adhesive also has excellent properties such as anti-yellowing and moisture resistance, which is beneficial to ensure the reliability of the reflective paper during use.
  • the room temperature curing transparent epoxy resin has good mechanical properties and low curing shrinkage, which is beneficial to ensure the stiffness and flatness of the reflective paper.
  • the room temperature curing transparent epoxy resin glue also has excellent chemical resistance, which is beneficial to ensure the reliability of the reflective paper during use.
  • the room temperature curing transparent epoxy resin glue can be cured at room temperature, which simplifies the preparation process of the reflective paper.
  • the white curing glue is, for example, polyvinyl acetate adhesive, but not limited thereto.
  • Polyvinyl acetate adhesive is a kind of thermoplastic adhesive obtained by polymerization of vinyl acetate monomer. According to the different polymerization methods, it can be divided into two types: solution type and emulsion type, and the general emulsion type is more widely used.
  • Vinyl acetate emulsion is commonly known as white latex or white glue. It has the advantages of pollution-free, low cost, high adhesion, fast curing speed, simple production process, and convenient use. Therefore, when the vinyl acetate emulsion is coated on the reflective layer, the reflective paper can have corresponding advantages such as environmental protection, low cost, high stiffness, and fast production efficiency.
  • FIG. 2 is a schematic structural diagram of the reflective paper 50a in FIG. 1 .
  • the bottom 511 of the reflective layer 51 is roughly rectangular.
  • Each through hole 511a on the bottom 511 is substantially rectangular, and a plurality of through holes 511a are arranged in an array in multiple rows and columns.
  • the inclined portion 512 includes four inclined portions respectively extending from four edges of the bottom 511 and sequentially connected, namely, a first inclined portion 5121 , a second inclined portion 5122 , a third inclined portion 5123 and a fourth inclined portion 5124 .
  • the first inclined portion 5121 and the third inclined portion 5123 are opposite to each other and respectively extend from the edges of the two short sides of the rectangle.
  • the second inclined portion 5122 is opposite to the fourth inclined portion 5124 and extends from the edges of the two long sides of the rectangle respectively.
  • the first inclined portion 5121 , the second inclined portion 5122 , the third inclined portion 5123 and the fourth inclined portion 5124 are all substantially isosceles trapezoidal.
  • the coating layer 52 completely covers the back surface 512b of the inclined portion 512, so as to maximize the area of the coating layer 52 and improve the stiffness of the reflective paper 50a.
  • the shape of the bottom 511 , the shape of the inclined portion 512 , and the shape and arrangement of the through holes 511 a are not limited thereto.
  • the bottom 511 may be parallelogram or ellipse or the like.
  • the first inclined part 5121 , the second inclined part 5122 , the third inclined part 5123 or the fourth inclined part 5124 can be formed by splicing a plurality of parts, instead of being integrally formed in a trapezoidal shape.
  • the through hole 511a may be a circular hole, an elliptical hole or the like.
  • the coating layer 52 has a thickness of 50 ⁇ m to 200 ⁇ m.
  • the thickness of the coating layer 52 is 50 ⁇ m to 80 ⁇ m, 80 ⁇ m to 100 ⁇ m, 100 ⁇ m to 120 ⁇ m, 120 ⁇ m to 150 ⁇ m, 150 ⁇ m to 180 ⁇ m, or 180 ⁇ m to 200 ⁇ m.
  • the thicker the thickness of the coating layer 52 the better the stiffness of the position of the reflective paper 50 a corresponding to the coating layer 52 ; the thinner the thickness of the coating layer 52 , the material cost of the coating layer 52 can be reduced.
  • FIG. 3 is a schematic structural diagram of a reflective paper 50b according to another embodiment of the present application.
  • the coating layer 52 partially covers the back surface 512 b of the inclined portion 512 .
  • the coating layer 52 covers the surfaces of the second inclined portion 5122 and the fourth inclined portion 5124 .
  • the coating layer 52 is disposed on the opposite inclined portion 512 of the reflective layer 51, so that the mechanical properties of the reflective paper 50b are relatively symmetrical.
  • the coating layer 52 may also be disposed on one or three inclined portions 512 , or the coating layer 52 may be disposed at intervals on each inclined portion 512 , which is not limited here.
  • FIG. 4 is a schematic structural diagram of a reflective paper 50c according to yet another embodiment of the present application.
  • the coating layer 52 is not provided on the inclined portion 512 of the reflective layer 51 , but an adhesive tape 53 is stuck thereon.
  • the adhesive tape 53 is pasted on one side of the back surface 512 b of the fourth inclined portion 5124 at intervals.
  • the adhesive tape 53 may be completely attached to the surface of the inclined portion 512 , or the adhesive tape 53 may be partially attached to the surface of the inclined portion 512 , which is not limited here. Wherein, the tape 53 is completely attached to the surface of the inclined portion 512 , the process is simple, and the process time is saved. When a plurality of adhesive tapes 53 are attached to the surface of the inclined portion 512 at intervals, material costs can be saved.
  • a coating layer and an adhesive tape can be disposed at the same time.
  • the coating layer can completely cover the reflective layer (eg, the coating layer completely covers the front and/or back side of the reflective layer), and the adhesive tape is attached to the side of the coating layer facing away from the reflective layer.
  • the tape can be completely covered on the side of the coating layer away from the reflective layer by one sticking, the process is simple and the process time is saved; or multiple tapes are pasted on the side of the coating layer away from the reflective layer at intervals to save material costs.
  • the coating layer may partially cover the reflective layer, the adhesive tape and the coating layer are provided on the same layer, and the adhesive tape is attached to a position on the reflective layer that does not cover the coating layer.
  • the coating layer 52 partially covers the back side 512b of the inclined portion 512, and the area where the back side 512b of the inclined portion 512 is not covered by the coating layer 52 can be pasted with an adhesive tape 53; or, the coating layer 52 completely covers the side of the inclined portion 512.
  • the adhesive tape 53 is pasted on the surface of the coating layer 52 away from the inclined portion 512 , or a plurality of adhesive tapes 53 are pasted on the surface of the coating layer 52 away from the inclined portion 512 at intervals.
  • FIG. 5 is a schematic structural diagram of a display device 100b according to another embodiment of the present application.
  • the difference between the display device 100b shown in FIG. 5 and the display device 100a shown in FIG. 1 is that, in the display device 100b, a coating layer 52 is not provided on the back surface 512b of the inclined portion 512 of the reflective layer 51, but a support structure 54 is provided. .
  • the support structure 54 abuts against the bent portion 412 a of the back plate 41 to support the reflective layer 51 .
  • the supporting degree of the reflective paper 50d and the back plate 41 in the surrounding gap G can be effectively increased without affecting the normal function of the front 512a of the reflective paper 50d, so as to effectively improve the problems of the reflective paper 50d such as bulging and slope collapse. Purpose.
  • the supporting structure 54 includes a fixing surface 541 , a first extending surface 545 , a supporting surface 542 , a bonding surface 544 , a transition surface 543 and a second extending surface 546 connected in sequence.
  • the fixing surface 541 is pressed and fixed on the back surface 512 b of the inclined portion 512 of the reflective layer 51 .
  • the supporting surface 542 is connected to the fixing surface 541 and the first extension surface 545 and forms a first preset angle ⁇ with the back surface 512 b of the inclined portion 512 .
  • the first preset included angle is close to or equal to 90 degrees
  • the bent portion 412a of the back plate 41 is approximately parallel to the inclined portion 512 of the reflective layer 51, so that the supporting surface 542 is approximately perpendicular to the bent portion 412a of the back plate 41 , play the role of mainly supporting the reflective layer 51 .
  • the bonding surface 544 connects the transition surface 543 and the supporting surface 542 , and is bonded to the bent portion 412 a of the backboard 41 .
  • the bonding surface 544 is bonded to the side plate 412 through an adhesive layer, so as to further enhance the stability of the support structure 54 supporting the reflective layer 51 .
  • the transition surface 543 connects the second extension surface 546 and the fixing surface 541 and forms a second preset angle ⁇ with the back surface 512b of the inclined portion 512 so as to overlap the back surface 512b of the reflective layer 51 through the second extension surface 546 .
  • the first extending surface 545 is connected to the supporting surface 542 and extends to cover the back surface 512 b of the inclined portion 512 .
  • the second extension surface 546 connects the transition surface 543 and the fixing surface 541 and extends to cover the inclined portion 512 of the back surface 512b.
  • the fixed surface 541, the supporting surface 542, the bonding surface 544 and the transition surface 543 are surrounded by a right-angled trapezoid
  • the supporting surface 542 is perpendicular to the fixed surface 541, and the fixed surface 541 It is the long side of the trapezoid, and the bonding surface 544 is the short side of the trapezoid.
  • the first extension surface 545 and the second extension surface 546 are formed on the reflective layer 51 by pressing and fixing, so as to effectively transition the connection between the support structure 54 and the reflective layer 51, and avoid affecting the front surface 512a of the reflective paper 50d effect, and can further maintain the stability of the support structure 54 supporting the reflective layer 51 .
  • the first extended surface 545 is in direct contact with the reflective layer 51 without other film layers between them; the second extended surface 546 is in direct contact with the reflective layer 51 without other film layers therebetween.
  • the first preset included angle ⁇ ranges from 10 degrees to 90 degrees
  • the second preset included angle ⁇ ranges from 10 degrees to 90 degrees.
  • the range of the first preset included angle is 10 degrees to 20 degrees, 20 degrees to 30 degrees, 30 degrees to 40 degrees, 40 degrees to 50 degrees, 50 degrees to 60 degrees, 60 degrees to 70 degrees, 70 degrees to 80 degrees, 80 degrees to 90 degrees.
  • the second preset included angle ⁇ ranges from 10° to 20°, 20° to 30°, 30° to 40°, 40° to 50°, 50° to 60°, 60° to 70°, 70° to 80° degrees, 80 degrees to 90 degrees.
  • one of the first preset angle ⁇ and the second preset angle ⁇ is close to 90 degrees, so as to mainly support the reflective layer 51 .
  • the first preset angle ⁇ is close to 90 degrees or equal to 90 degrees
  • the support surface 542 is approximately perpendicular to the fixing surface 541.
  • the larger the second preset angle ⁇ the smaller the area of the transition surface 543, and the fit The larger the area of the surface 544, the more stable the bonding between the bonding surface 544 and the back plate 41 is.
  • the fixing surface 541, the supporting surface 542, the bonding surface 544 the closer the quadrangle formed by the transition surface 543 is to a rectangle, the greater the mechanical strength of the support structure 54 and the more stable the support for the reflective layer 51 .
  • the setting of the first preset angle ⁇ and the second preset angle ⁇ also needs to consider the adjustment of the reflection effect of the reflective layer 51 on the light emitted by the light emitting element 43, so as to ensure that the support structure 54 supports the reflective layer 51 stably. In the case of , the light reflection efficiency of the reflective layer 51 to the light emitting element 43 is optimal.
  • the supporting structure 54 includes an organic substrate and a plurality of inorganic particles dispersed in the organic substrate.
  • the material of the organic substrate is, for example, PET, but not limited thereto.
  • Inorganic particles are, for example, zirconia, niobium oxide, silicon oxide, etc., but are not limited thereto. Among them, dispersing the inorganic particles in the organic substrate can increase the stiffness of the support structure 54 on the one hand, and on the other hand, the inorganic particles can refract or reflect the light, so as to facilitate the convergence of the light toward the side of the liquid crystal display panel 10 and improve the light intensity. utilization rate.
  • the thickness of the organic substrate is 50 ⁇ m ⁇ 300 ⁇ m.
  • the thickness of the organic substrate is, for example, 50 ⁇ m to 80 ⁇ m, 80 ⁇ m to 120 ⁇ m, 120 ⁇ m to 150 ⁇ m, 150 ⁇ m to 200 ⁇ m, 200 ⁇ m to 250 ⁇ m, or 250 ⁇ m to 300 ⁇ m.
  • the thickness of the organic substrate can be selected according to the structure of the backboard matched with the reflective paper, at least to ensure that the reflective paper obtained by laminating the organic substrate and the reflective layer, after lapping with the backboard, the support structure is against the backboard , rather than floating relative to the backplane.
  • the thickness of the organic substrate is roughly uniform before being laminated with the reflective layer.
  • the thickness of a local area of the organic substrate becomes smaller after being laminated with the reflective layer, forming a first extension. face and the second extended face.
  • the thickness of the organic substrate is 50 ⁇ m to 300 ⁇ m, referring to the thickness before the organic substrate and the reflective layer are laminated.
  • FIG. 6 is a schematic diagram of the front side 512a of the reflective paper 50d in FIG. 5 .
  • the supporting structure 54 on the third inclined portion 5123 is shown, while the supporting structures 54 on the other three inclined portions 512 are omitted.
  • the first extension surface 545 and the second extension surface 546 of the support structure 54 are omitted.
  • the support structure 54 also includes two opposite sides 547 .
  • the side surface 547 connects the fixing surface 541 , the supporting surface 542 , the fitting surface 544 , and the transition surface 543 .
  • the side surface 547 is roughly in the shape of a right-angled trapezoid, and the side surface 547 and the fixing surface 541 , the supporting surface 542 , the fitting surface 544 , and the transition surface 543 are surrounded by a rectangular prism.
  • FIG. 7 is a schematic diagram of the back side 512b of the reflective paper 50d in FIG. 5 .
  • a support structure 54 is provided on the back side 512b of each inclined portion 512 to maximize the stiffness of the inclined portion 512 of the reflective paper 50d, and to fill the reflective layer 51 and the back plate 41 to the greatest extent.
  • the gap G between the inclined portions 512 of the reflective paper 50d can effectively improve problems such as bulging of the reflective paper 50d and collapse of the inclined surface.
  • FIG. 8 is a schematic structural diagram of a display device 100c according to yet another embodiment of the present application.
  • the support structure 54 does not include a bonding surface.
  • the fixing surface 541, the supporting surface 542 and the transition surface 543 enclose a triangle shape.
  • the support structure 54 with triangular cross-section has stable support and simple structure.
  • the triangle is a right triangle, which can better support the reflective layer 51 .
  • FIG. 9 is a schematic diagram of the front side 512a of the reflective paper 50e in FIG. 8 .
  • the support structure 54 on the third inclined portion 5123 is drawn, while the support structures 54 on the other three inclined portions 512 are omitted.
  • the first extension surface 545 and the second extension surface 546 of the support structure 54 are omitted.
  • the support structure 54 also includes two opposite sides 547 .
  • the side surface 547 connects the fixing surface 541 , the supporting surface 542 and the transition surface 543 .
  • the side surface 547 is roughly in the shape of a right triangle, and the side surface 547 is surrounded by the fixing surface 541 , the supporting surface 542 and the transition surface 543 to roughly form a triangular prism.
  • FIG. 10 is a schematic diagram of the back side 512b of the reflective paper 50e in FIG. 8 .
  • a support structure 54 is provided on the back side 512b of each inclined portion 512 to maximize the stiffness of the inclined portion 512 of the reflective paper 50e, and to fill the reflective layer 51 and the back plate 41 to the greatest extent.
  • the gap G between the inclined parts 512 of the reflective paper 50e can effectively improve the problem of bulging of the reflective paper 50e and the collapse of the slope.
  • the shape of the support structure is not limited to that shown in FIG. 7 and FIG. 10 .
  • the support structure may not include the first extended surface and the second extended surface; alternatively, the support structure may be a pentagonal prism, at least one side of the pentagonal prism is in direct contact with the reflective layer and fixed, and one side is supported between the reflective layer and the back surface. Between the boards, one side is directly attached to the back board, and the remaining two sides are transitional surfaces.
  • the distribution of the supporting structures is not limited to those shown in FIG. 7 and FIG. 10 .
  • the support structure can be arranged corresponding to one inclined part; or, the supporting structure can be arranged corresponding to two inclined parts, and the two inclined parts can be arranged oppositely or next to each other, preferably oppositely arranged, so that the mechanism of the reflective paper The strength is substantially uniform; alternatively, the support structure is arranged corresponding to the three slopes.
  • the arrangement of the support structure on the inclined portion is not limited to a continuous structure.
  • a plurality of support structures are arranged at intervals on the surface of an inclined portion to support part of the reflective layer; or, for the four corners of the bottom of the reflective layer, support structures are provided to prevent the reflective layer from standing at the four corners or drum kit.
  • the reflective paper used in the above embodiments can be appropriately deformed without departing from the spirit and scope of the technical solution of the present application. That is, a combination of any two or three of the coating layer, adhesive tape, and support structure can be provided on the back of the reflective layer, and any one of the coating layer, adhesive tape, and support structure can completely cover the back of the inclined portion or partially Cover the back of the slope.
  • a support structure is provided on the coating layer; or, after the tape is partially or completely attached to the back of the slope, a support structure is provided on the tape; or , the partial area of the inclined portion is provided with a coating layer, the partial area is provided with an adhesive tape, and the local area is provided with a support structure and the like.

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Abstract

本申请涉及显示技术领域，旨在解决现有的直下式背光模组中，存在反射纸的边缘塌陷或边缘鼓包的问题，提供一种反射纸、背光模组及显示装置。反射纸包括反射层以及涂布层。反射层包括底部以及围绕底部延伸的倾斜部，倾斜部与底部之间具有折线，当沿折线折叠反射纸时，倾斜部沿底部的四周边缘朝向远离底部的一侧倾斜，底部与倾斜部配合形成一容置空间。底部间隔设置有多个通孔，倾斜部包括朝向所述容置空间的正面以及与正面相对的背面。正面用于反射光线。涂布层设置于反射层上，以增加所述反射纸的挺度。该反射纸可有效改善反射纸的边缘塌陷或边缘鼓包的问题，进而改善应用其的显示装置的显示效果。

Description

反射纸、背光模组及显示装置
相关申请的交叉引用
本申请要求在2021-12-13提交中国专利局、申请号为202111517368.1、申请名称为“反射纸、背光模组及显示装置”的中国专利的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域，具体而言，涉及反射纸、应用该反射纸的背光模组及应用该背光模组的显示装置。
背景技术
现有的直下式背光模组中，存在反射纸的边缘塌陷或边缘鼓包的问题。
发明内容
本申请第一方面提供一种反射纸，以解决现有的直下式背光模组中，存在反射纸的边缘塌陷或边缘鼓包的问题。该反射纸包括：
反射层，反射层包括底部以及围绕底部延伸的倾斜部，倾斜部与底部之间具有折线，当沿折线折叠反射纸时，倾斜部沿底部的四周边缘朝向远离底部的一侧倾斜，底部与倾斜部配合形成一容置空间，底部间隔设置有多个通孔，倾斜部包括朝向容置空间的正面以及与正面相对的背面，正面用于反射光线；以及
涂布层，涂布层设置于反射层上，以增加反射纸的挺度。
本申请实施例中，通过对反射层上设置涂布层，以增加反射纸的挺度(即，设置有涂布层的反射层的挺度大于反射层本身的挺度)，可实现对反射纸的倾斜部的有效支撑，可有效改善反射纸的边缘塌陷或边缘鼓包的问题，进而改善应用其的显示装置的显示效果。
一些实施例中，涂布层的材料为透明固化胶，透明固化胶设置于背面和/或正面。另一些实施例中，涂布层的材料为白色固化胶，白色固化胶设置于背面。白色固化胶例如为白乳胶。透明固化胶例如为紫外光固化胶。透明固化胶经涂布固化后，可有效增加反射纸的挺度，同时由于透明固化胶具有较佳的光线透过率，因此即使透明固化胶设置在反射层的倾斜部的正面也可不影响反射纸正面的正常功能。此外，透明固化胶和白色固化胶均可设置在倾斜部的背面，以增加反射纸的挺度，有效改善反射纸的鼓包及倾斜部的塌陷等问题，同时透明固化胶和白色固化胶设置在背面还可保证不影响反射纸正面的功能。此外，涂布层针对倾斜部设置，非是整个反射层的表面设置，因此，可有效降低涂布层的材料成本。
一些实施例中，涂布层的厚度为50μm～200μm。例如，涂布层的厚度为50μm～80μm、80μm～100μm、100μm～120μm、120μm～150μm、150μm～180μm、180μm～200μm。其中，涂布层的厚度越厚，反射纸对应涂布层的位置，挺度越好；涂布层的厚度越薄，可降低涂布层的材料成本。
一些实施例中，涂布层局部覆盖反射层上；或，涂布层完全覆盖反射层上。涂布层完全 覆盖反射层上，可最大限度地增加涂布层的面积，提升反射纸的挺度。涂布层局部覆盖反射层上，一方面，可确保反射纸的挺度；另一方面，减少制程，节约材料。
一些实施例中，涂布层完全覆盖反射层上，反射纸还包括胶带，所述胶带贴附于所述涂布层背离所述反射层的一侧。例如，胶带通过一次贴附完全覆盖在涂布层远离反射层的一侧，工艺简单，节省制程时间；或者，多条胶带间隔贴附在涂布层远离反射层的一侧，以节约材料成本。另一些实施例中，涂布层局部覆盖反射层上，反射纸还包括胶带，所述胶带与所述涂布层同层设置，且所述胶带贴附于所述反射层上未覆盖所述涂布层的位置。
一些实施例中，反射纸还包括支撑结构，支撑结构包括固定于背面的一侧的固定面、连接固定面并与背面呈第一预设夹角的支撑面、以及连接固定面并与背面呈第二预设夹角的过渡面。较佳地，第一预设夹角接近或等于90度，支撑面与固定面大致垂直，起主要支撑反射层的作用。
一些实施例中，沿垂直于背面的方向上，支撑结构的截面中，固定面、支撑面及过渡面围合呈三角形。其中，三角形截面的支撑结构，支撑稳定且结构简单。具体地，三角形为直角三角形，可更好地对反射层进行支撑。
一些实施例中，支撑结构还包括连接过渡面和支撑面之间的贴合面。贴合面用于与背板贴合(例如，贴合面与背板的侧板通过胶层贴合)，以增加支撑结构对反射层的支撑作用，防止反射纸在组装过程中出现塌陷问题。
一些实施例中，沿垂直于背面的方向上，支撑结构的截面中，固定面、支撑面、贴合面及过渡面围合呈直角梯形，固定面为直角梯形的长边，贴合面为直角梯形的短边。支撑结构大致呈四棱柱。
一些实施例中，支撑结构还包括连接支撑面并延伸覆盖背面的第一延展面、以及连接过渡面并延伸覆盖背面的第二延展面。第一延展面和第二延展面通过压合固定成型于反射层上，以有效过渡支撑结构与反射层之间的连接，避免影响反射纸的正面效果，并且可以更加地维持支撑结构对反射层支撑的稳定性。
一些实施例中，第一预设夹角的范围为10度～90度，第二预设夹角的范围为10度～90度。例如，第一预设夹角的范围为10度～20度、20度～30度、30度～40度、40度～50度、50度～60度、60度～70度、70度～80度、80度～90度。第二预设夹角的范围为10度～20度、20度～30度、30度～40度、40度～50度、50度～60度、60度～70度、70度～80度、80度～90度。较佳地，第一预设夹角和第二预设夹角其中之一接近90度，以起主要支撑反射层的作用。
一些实施例中，第一预设夹角为接近或等于90度，支撑面大致垂直于固定面，第二预设夹角越大，过渡面的面积越小，贴合面的面积越大，贴合面与背板之间的贴合更稳定，沿垂直于背面的方向上，支撑结构的截面中，固定面、支撑面、贴合面、过渡面围合而成的四边形越趋近于矩形，支撑结构的机械强度越大，对反射层的支撑更稳定。而当固定面及支撑面一定的情况下，第二预设夹角越小，过渡面的面积越大，支撑结构与反射层之间的连接更平缓，可有效避免发射纸搭接至背板上后，在支撑结构处由于侧板会给予支撑结构朝向反射层的支撑力，导致支撑结构处反射层凸起的问题。此外，第一预设夹角和第二预设夹角的设置，还需考虑反射层对发光元件出射的光的反射效果进行调整，以保证支撑结构对反射层稳定支撑的情况下，反射层对发光元件的光反射效率最优。
一些实施例中，支撑结构包括有机基材及分散于有机基材中的多个无机粒子。有机基材的材料例如为PET，但不限于此。无机粒子例如为氧化锆、氧化铌、氧化硅等，但不限于此。 其中，在有机基材中分散无机粒子，一方面可增加支撑结构的挺度，另一方面无机粒子可对光线进行折射或反射，以利于光线朝向液晶显示面板的一侧会聚，提高光线的利用率。
一些实施例中，有机基材的厚度为50μm～300μm。有机基材的厚度例如为50μm～80μm、80μm～120μm、120μm～150μm、150μm～200μm、200μm～250μm、250μm～300μm。具体地，有机基材的厚度可依据与反射纸搭配的背板的结构选择，至少保证有机基材与反射层压合得到的反射纸，在与背板搭接后，支撑结构抵持背板，而不是相对背板悬空。另外，有机基材在与反射层压合之前厚度大致均匀，在有机基材与反射层压合过程中，有机基材的局部区域经与反射层压合后，厚度变小，形成第一延展面和第二延展面。有机基材的厚度为50μm～300μm，是指有机基材与反射层压合之前的厚度。
本申请第二方面提供一种背光模组，其包括：
背板，背板包括底板以及围绕底板并沿底板的四周边缘朝向远离底板的一侧倾斜延伸形成的侧板；
多个发光元件，位于底板上；以及
本申请第一方面的反射纸，倾斜部搭接于侧板上，底部位置对应底板，每一发光元件从一个通孔处暴露出并位于反射纸的容置空间内。
该背光模组为直下式模组，由于其包括本申请第一方面的反射纸，使得出射的背光均匀。
一些实施例中，反射纸包括支撑结构的情况下，支撑结构抵持侧板，以支撑反射层。通过设置支撑结构，可有效增加在四周间隙中，反射纸与背板的支撑度，同时不影响反射纸正面正常功能，达到有效改善反射纸鼓包及斜面塌陷等问题的目的。
一些实施例中，支撑结构包括贴合面的情况下，贴合面与侧板通过胶层贴合，以进一步增强支撑结构对反射层支撑的稳定性。
本申请第三方面提供一种显示装置，其包括：
液晶显示面板；以及
本申请第二方面的背光模组，其中，背光模组位于液晶显示面板背离其显示面的一侧。
由于第二方面的背光模组出射的背光均匀，因此，该显示装置不会出现由于反射纸的塌陷或鼓包引起的明暗斑的问题，显示效果佳。
附图说明
图1为本申请一实施例的显示装置的结构示意图。
图2为图1中反射纸的结构示意图。
图3为本申请另一实施例的反射纸的结构示意图。
图4为本申请再一实施例的反射纸的结构示意图。
图5为本申请另一实施例的显示装置的结构示意图。
图6为图5中反射纸的正面的示意图。
图7为图5中反射纸的背面的示意图。
图8为本申请再一实施例的显示装置的结构示意图。
图9为图8中反射纸的正面的示意图。
图10为图8中反射纸的背面的示意图。
主要元件符号说明：
显示装置                         100a、100b、100c
液晶显示面板                     10
缓冲层                           20
中框                             30
承载面                           31
卡槽                             32
背光模组                         40
背板                             41
底板                             411
侧板                             412
弯折部                           412a
承载部                           412b
卡接部                           412c
电路板                           42
发光元件                         43
扩散板                           44
光学膜片组                       45
反射纸                           50a、50b、50c、50d、50e
容置空间                         S
反射层                           51
底部                             511
通孔                             511a
倾斜部                           512
正面                             512a
背面                             512b
第一倾斜部                       5121
第二倾斜部                       5122
第三倾斜部                       5123
第四倾斜部                       5124
涂布层                           52
胶带                             53
支撑结构                         54
固定面                           541
支撑面                           542
过渡面                           543
第一预设夹角                     β
第二预设夹角                     α
贴合面                           544
第一延展面                       545
第二延展面                       546
侧面                           547
间隙                           G
折线                           L
如下具体实施方式将结合上述附图进一步说明本申请。
具体实施方式
图1为本申请一实施例的显示装置100a的结构示意图。显示装置100a例如为显示器、笔记本电脑、电视机等。如图1所示，显示装置100a包括液晶显示面板10、缓冲层20、中框30以及背光模组40。
液晶显示面板10用于显示画面。背光模组40位于液晶显示面板10背离其显示面的一侧，其为直下式背光模组，用以提供背光至液晶显示面板10。中框30用于承载液晶显示面板10，并连接背光模组40。具体地，中框30包括承载面31，液晶显示面板10搭载于该承载面31上。缓冲层20设置于承载面31上，并位于液晶显示面板10和中框30之间。缓冲层20大致呈环状，缓冲层20可通过双面胶(图未示)贴附在中框30和液晶显示面板10上。缓冲层20的材质例如为黑色泡棉。一方面，黑色泡棉具有吸光性，可避免背光模组40的光线从液晶显示面板10和中框30的结合处泄露，改善漏光问题。另一方面，黑色泡棉可起到缓冲作用，避免运输过程中，液晶显示面板10受到挤压或碰撞而造成液晶显示面板10的阵列基板破裂失效。
背光模组40包括背板41、位于背板41上的电路板42、位于电路板42上并电性连接电路板42的多个发光元件43、位于背板41靠近液晶显示面板10一侧的反射纸50a、位于反射纸50a靠近液晶显示面板10一侧的扩散板44以及与扩散板44层叠设置并位于扩散板44靠近液晶显示面板10的一侧的光学膜片组45。背板41例如金属材质，以具有较佳的机械强度。电路板42例如为硬质电路板、软性电路板或软硬结合板。发光元件43用于出射光束，其例如为发光二极管(Light Emitting Diode，LED)灯珠。反射纸50a搭接于背板41上，用于将发光元件43的光线朝向液晶显示面板10的方向反射，以增加光线的利用率。扩散板44用于将入射其上的光进行均匀扩散。光学膜片组45例如包括沿远离液晶显示面板10的方向依次层叠设置的增亮膜、导光板等，但不限于此。
背板41包括底板411以及围绕底板411并沿底板411的四周边缘朝向远离底板411的一侧倾斜延伸形成的侧板412。侧板412包括自底板411顺次延伸的弯折部412a、承载部412b和卡接部412c。中框30设置有卡槽32，卡接部412c与卡槽32相匹配，卡接部412c卡入卡槽32内，从而实现中框30卡接至背板41上。其他实施例中，中框30和侧板412之间可采用螺纹连接，但不限于此。承载部412b用于承载反射纸50a、扩散板44及光学膜片组45等。
背板41的底板411和背板41的侧板412围设形成截面大致呈梯形的空间。电路板42、发光元件43及反射纸50a均位于该梯形的空间内。电路板42位于底板411上。
反射纸50a包括反射层51以及涂布层52。反射层51的材质例如为聚对苯二甲酸乙二醇酯(polyethylene glycol terephthalate，PET)，但不限于此。
反射层51包括底部511以及围绕底部511延伸的倾斜部512。底部511呈平板状，反射纸50a的底部511与倾斜部512之间具有折线L(示出在图2中)，折线L例如为骑缝线。当沿折线L折叠反射纸50a时，倾斜部512沿底部511的四周边缘朝向远离底 部511的一侧倾斜，底部511和倾斜部512配合形成容置空间S。反射纸50a的底部511位置对应背板41的底板411设置。反射纸50a的底部511间隔设置有多个通孔511a。多个通孔511a与多个发光元件43的形状及尺寸相匹配。每一发光元件43从一个通孔511a处暴露出，并位于容置空间S内。反射纸50a的倾斜部512搭载于背板41的侧板412上，反射层51的倾斜部512和背板41的弯折部412a之间形成间隙G。具体地，反射纸50a的倾斜部512和背板41的承载部412b之间可通过双面胶或粘合剂进行粘接，但不限于此。
需要说明的是，相关技术中，当反射纸组装至直下式背板上时，因背板的侧板为倾斜设计的原因，反射纸与背板的承载部搭接后，反射纸与背板之间会形成悬空的区域。而由于反射纸本身材质柔软难以维持原有的平面形状，因此，在产线将反射纸组装至背板上时，容易出现边缘组装鼓包，导致显示装置的边缘出现亮暗斑，影响显示效果。同时，因反射纸挺度限制，大尺寸显示装置的悬空的区域面积大，在异常运输、振动等场景还会造成边缘塌陷问题，严重影响显示效果。而本申请的实施例中，为改善直下式背光模组中，反射纸在与背板组装时或者在异常运输、振动等场景中，存在的反射纸的边缘塌陷或边缘鼓包的问题，提供一种边缘加强设计的反射纸。
具体地，反射纸50a的倾斜部512包括靠近液晶显示面板10(或者说朝向容置空间S)的用于反射光线的正面512a以及与正面512a相对的背面512b。涂布层52设置于反射层51的背面512b。
涂布层52的材料为透明固化胶或白色固化胶，其经涂布固化后，可有效增加反射纸50a的挺度，同时还不影响反射纸50a正面512a的正常功能。如此，有效改善反射纸50a的鼓包及倾斜部512的塌陷等问题。其中，涂布层52为透明固化胶的情况下，其不限于设置于倾斜部512的背面512b，其还可以设置于倾斜部512的正面512a。一方面，透明固化胶可有效增加反射纸的挺度，同时由于透明固化胶具有较佳的光线透过率，即使透明固化胶设置在反射层的倾斜部的正面也可不影响反射纸的正面的正常功能。此外，涂布层52针对倾斜部512设置，非是整个反射层51的表面设置，因此，可有效降低涂布层52的材料成本。其他实施例中，涂布层52不限于设置于倾斜部。例如，涂布层52为透明固化胶的情况下，涂布层52还可设置在底部用于反射光线的正面和/或底部的与正面相对的背面；涂布层52为白色固化胶的情况下，涂布层52还可设置在底部的背面。其中，涂布层52设置在底部和倾斜部的同一侧的表面情况下(如，涂布层52设置的底部的正面和倾斜部的正面，或涂布层52设置的底部的背面和倾斜部的背面)，位于倾斜部和底部的涂布层可经一次制程同时形成，以简化制程。并且，通过在底部和倾斜部均形成涂布层，可增强反射纸整体的挺度。
具体地，透明固化胶例如为紫外光固化丙烯酸酯类胶粘剂或室温固化透明环氧树脂胶，但不限于此。其中，紫外光固化丙烯酸酯类胶粘剂经紫外光照射后可快速(数秒钟内)由液态转化为固态，固化速率快，利于节约制程时间，提升生产效率。此外，紫外光固化丙烯酸酯类胶粘剂固化后，具有高的透光率(大于等于90％)，可使光线经其后，大部分入射至反射层，并被反射层反射，以提升反射纸对光源的利用率。进一步地，紫外光固化丙烯酸酯类胶粘剂还具有优异的抗黄变、抗湿气等性能，利于保证反射纸在使用过程中的可靠性。室温固化透明环氧树脂胶具有良好的力学性能且固化收缩率低，利于保证反射纸的挺度及平整性。此外，室温固化透明环氧树脂胶还具有优良的耐化学品 性，利于保证反射纸的在使用过程中的可靠性。并且，室温固化透明环氧树脂胶在室温下即可固化，使得反射纸的制备工艺简化。
白色固化胶例如为聚醋酸乙烯酯类胶粘剂，但不限于此。聚醋酸乙烯酯类胶粘剂是由醋酸乙烯酯单体经聚合反应而得到的一种热塑型胶粘剂。按其聚合方式的不同，又分为溶液型和乳液型两种，一般乳液型应用更加广泛。醋酸乙烯酯乳液俗称白乳胶或白胶，其具有无公害、低成本、粘接力高、固化速度快、生产工艺简单、使用方便等优点。因此，当醋酸乙烯酯乳液涂布于反射层上后，可使得反射纸具有环保、低成本、挺度高、生产效率快等相应的优点。
图2为图1中反射纸50a的结构示意图。如图2所示，反射层51的底部511大致呈矩形。底部511上的每一通孔511a大致呈矩形，多个通孔511a呈阵列排布为多行多列。倾斜部512包括自底部511的四个边缘分别延伸并顺次连接的四个倾斜分部，即，第一倾斜部5121、第二倾斜部5122、第三倾斜部5123及第四倾斜部5124。第一倾斜部5121和第三倾斜部5123相对，并自矩形的两个短边的边缘分别延伸而出。第二倾斜部5122和第四倾斜部5124相对，并自矩形的两个长边的边缘分别延伸而出。第一倾斜部5121、第二倾斜部5122、第三倾斜部5123及第四倾斜部5124均大致呈等腰梯形。
涂布层52完全覆盖倾斜部512的背面512b，以最大限度地增加涂布层52的面积，提升反射纸50a的挺度。
在其他实施例中，底部511的形状、倾斜部512的形状、通孔511a的形状及排布均不限于此。例如，底部511可为平行四边形或椭圆形等。第一倾斜部5121、第二倾斜部5122、第三倾斜部5123或第四倾斜部5124可通过多个部分拼接而成，而非一体成型的梯形。通孔511a可为圆孔、椭圆孔等。
涂布层52的厚度为50μm～200μm。例如，涂布层52的厚度为50μm～80μm、80μm～100μm、100μm～120μm、120μm～150μm、150μm～180μm、180μm～200μm。其中，涂布层52的厚度越厚，反射纸50a对应涂布层52的位置，挺度越好；涂布层52的厚度越薄，可降低涂布层52的材料成本。
图3为本申请另一实施例的反射纸50b的结构示意图。如图3所示，涂布层52局部覆盖倾斜部512的背面512b。涂布层52覆盖第二倾斜部5122及第四倾斜部5124的表面。通过将涂布层52分布在沿底部511的两个长边分布延伸而出的倾斜部512的表面，一方面，可确保反射纸50b的挺度；另一方面，减少制程，节约材料。同时，涂布层52在反射层51的相对的倾斜部512上设置，可使反射纸50b的机械性能相对对称。其他实施例中，涂布层52也可设置在一个或三个倾斜部512上，或者涂布层52在每一倾斜部512上间隔设置，在此不作限制。
图4为本申请再一实施例的反射纸50c的结构示意图。如图4所示，反射层51的倾斜部512上未设置涂布层52，而是贴附有胶带53。其中，胶带53间隔贴附于第四倾斜部5124的背面512b的一侧上。通过贴附胶带53，提升反射纸50c的挺度，改善反射纸50c的鼓包及倾斜部512的塌陷等问题。
其他实施例中，胶带53可完全贴附于倾斜部512的表面，或者胶带53局部贴附倾斜部512的表面，在此不做限制。其中，胶带53完全贴附倾斜部512的表面的情况，工艺简单，节省制程时间。多条胶带53间隔贴附倾斜部512的表面的情况，可节约材料成本。
一些实施例中，在反射纸的反射层上，可同时设置涂布层和胶带。例如，涂布层可完全覆盖反射层上(如，涂布层完全覆盖反射层的正面和/或背面)，胶带贴附于涂布层背离反射层的一侧。胶带可通过一次贴附完全覆盖在涂布层远离反射层的一侧，工艺简单，节省制程时间；或者，多条胶带间隔贴附在涂布层远离反射层的一侧，以节约材料成本。又例如，涂布层可局部覆盖反射层上，胶带与涂布层同层设置，且胶带贴附于反射层上未覆盖涂布层的位置。具体地，涂布层52局部覆盖倾斜部512的背面512b，而倾斜部512的背面512b未被涂布层52覆盖的区域可贴附胶带53；或者，涂布层52完全覆盖倾斜部512的背面512b，胶带53贴附在涂布层52远离倾斜部512的表面上，或多条胶带53间隔贴附在涂布层52远离倾斜部512的表面上。
图5为本申请另一实施例的显示装置100b的结构示意图。图5所示的显示装置100b与图1的显示装置100a的区别在于，显示装置100b中，反射层51的倾斜部512的背面512b上未设置有涂布层52，而是设置有支撑结构54。
如图5所示，支撑结构54抵持背板41的弯折部412a，以支撑反射层51。通过设置支撑结构54，可有效增加在四周间隙G中，反射纸50d与背板41的支撑度，同时不影响反射纸50d正面512a正常功能，达到有效改善反射纸50d鼓包及斜面塌陷等问题的目的。
具体地，支撑结构54包括顺次连接的固定面541、第一延展面545、支撑面542、贴合面544、过渡面543以及第二延展面546。固定面541压合固定于反射层51的倾斜部512的背面512b。支撑面542连接固定面541和第一延展面545并与倾斜部512的背面512b呈第一预设夹角β。较佳地，第一预设夹角接近或等于90度，背板41的弯折部412a与反射层51的倾斜部512大致平行，使得支撑面542与背板41的弯折部412a大致垂直，起主要支撑反射层51的作用。贴合面544连接过渡面543和支撑面542，并与背板41的弯折部412a贴合。例如，贴合面544与侧板412通过胶层贴合，以进一步增强支撑结构54对反射层51支撑的稳定性。过渡面543连接第二延展面546、固定面541并与倾斜部512的背面512b呈第二预设夹角α，以通过第二延展面546与反射层51的背面512b搭接。第一延展面545连接支撑面542并延伸覆盖倾斜部512的背面512b。第二延展面546连接过渡面543、固定面541并延伸覆盖背面512b倾斜部512的。沿垂直于背面512b的方向上，支撑结构54的截面中，固定面541、支撑面542、贴合面544及过渡面543围合呈直角梯形，支撑面542垂直于固定面541，固定面541为梯形的长边，贴合面544为梯形的短边。
一些实施例中，第一延展面545和第二延展面546通过压合固定成型于反射层51上，以有效过渡支撑结构54与反射层51之间的连接，避免影响反射纸50d的正面512a效果，并且可以更加地维持支撑结构54对反射层51支撑的稳定性。具体地，第一延展面545和反射层51直接接触，二者之间并无其他膜层；第二延展面546和反射层51直接接触，二者之间并无其他膜层。
一些实施例中，第一预设夹角β的范围为10度～90度，第二预设夹角α的范围为10度～90度。例如，第一预设夹角的范围为10度～20度、20度～30度、30度～40度、40度～50度、50度～60度、60度～70度、70度～80度、80度～90度。第二预设夹角α的范围为10度～20度、20度～30度、30度～40度、40度～50度、50度～60度、60度～70度、70 度～80度、80度～90度。较佳地，第一预设夹角β和第二预设夹角α其中之一接近90度，以起主要支撑反射层51的作用。
一些实施例中，第一预设夹角β接近90度或等于90度，支撑面542大致垂直于固定面541，第二预设夹角α越大，过渡面543的面积越小，贴合面544的面积越大，贴合面544与背板41之间的贴合更稳定，沿垂直于背面512b的方向上，支撑结构54的截面中，固定面541、支撑面542、贴合面544、过渡面543围合而成的四边形越趋近于矩形，支撑结构54的机械强度越大，对反射层51的支撑更稳定。而第二预设夹角α越小，过渡面543的面积越大，支撑结构54与反射层51之间的连接更平缓，可有效避免发射纸搭接至背板41上后，在支撑结构54处由于侧板412会给予支撑结构54朝向反射层51的支撑力，导致支撑结构54处反射层51凸起的问题。此外，第一预设夹角β和第二预设夹角α的设置，还需考虑反射层51对发光元件43出射的光的反射效果进行调整，以保证支撑结构54对反射层51稳定支撑的情况下，反射层51对发光元件43的光反射效率最优。
一些实施例中，支撑结构54包括有机基材及分散于有机基材中的多个无机粒子。有机基材的材料例如为PET，但不限于此。无机粒子例如为氧化锆、氧化铌、氧化硅等，但不限于此。其中，在有机基材中分散无机粒子，一方面可增加支撑结构54的挺度，另一方面无机粒子可对光线进行折射或反射，以利于光线朝向液晶显示面板10的一侧会聚，提高光线的利用率。
一些实施例中，有机基材的厚度为50μm～300μm。有机基材的厚度例如为50μm～80μm、80μm～120μm、120μm～150μm、150μm～200μm、200μm～250μm、250μm～300μm。具体地，有机基材的厚度可依据与反射纸搭配的背板的结构选择，至少保证有机基材与反射层压合得到的反射纸，在与背板搭接后，支撑结构抵持背板，而不是相对背板悬空。另外，有机基材在与反射层压合之前厚度大致均匀，在有机基材与反射层压合过程中，有机基材的局部区域经与反射层压合后，厚度变小，形成第一延展面和第二延展面。有机基材的厚度为50μm～300μm，是指有机基材与反射层压合之前的厚度。
图6为图5中反射纸50d的正面512a的示意图。为清楚示意，图6中，仅画出位于第三倾斜部5123上的支撑结构54，而省略了另外三个倾斜部512上的支撑结构54。并且，图6中，省略了支撑结构54的第一延展面545和第二延展面546。如图6所示，支撑结构54还包括相对的两个侧面547。侧面547连接固定面541、支撑面542、贴合面544、过渡面543。侧面547大致呈直角梯形，侧面547与固定面541、支撑面542、贴合面544、过渡面543围合大致呈四棱柱。
图7为图5中反射纸50d的背面512b的示意图。如图7所示，每一倾斜部512的背面512b上设置有一个支撑结构54，以最大限度的提升反射纸50d的倾斜部512的挺度，并最大限度的填充反射层51与背板41的倾斜部512之间的间隙G，达到有效改善反射纸50d鼓包及斜面塌陷等问题的目的。
图8为本申请再一实施例的显示装置100c的结构示意图。图8所示的显示装置100c与图5的显示装置100b的区别在于，显示装置100c中，支撑结构54不包括贴合面。沿垂直于背面512b的方向上，支撑结构54的截面中，固定面541、支撑面542及过渡面 543围合呈三角形。其中，三角形截面的支撑结构54，支撑稳定且结构简单。具体地，三角形为直角三角形，可更好地对反射层51进行支撑。
图9为图8中反射纸50e的正面512a的示意图。同样，为清楚示意，图9中，仅画出位于第三倾斜部5123上的支撑结构54，而省略了另外三个倾斜部512上的支撑结构54。并且，图9中，省略了支撑结构54的第一延展面545和第二延展面546。如图9所示，支撑结构54还包括相对的两个侧面547。侧面547连接固定面541、支撑面542、过渡面543。侧面547大致呈直角三角形，侧面547与固定面541、支撑面542、过渡面543围合大致呈三棱柱。
图10为图8中反射纸50e的背面512b的示意图。如图10所示，每一倾斜部512的背面512b上设置有一个支撑结构54，以最大限度的提升反射纸50e的倾斜部512的挺度，并最大限度的填充反射层51与背板41的倾斜部512之间的间隙G，达到有效改善反射纸50e鼓包及斜面塌陷等问题的目的。
其他实施例中，支撑结构的形状不限于图7和图10所示。例如，支撑结构可不包括第一延展面和第二延展面；或者，支撑结构可为五棱柱，至少五棱柱的侧面中，一个侧面与反射层直接接触并固定，一个侧面支撑于反射层与背板之间，一个侧面与背板直接贴合，剩下的两个侧面为过渡面。此外，支撑结构的分布也不限于图7和图10所示。例如，支撑结构可对应一个倾斜部设置；或者，支撑结构对应两个倾斜部设置，该两个倾斜部可为相对设置或紧邻设置的，较佳地为相对设置的，以使反射纸的机械强度大致均匀；或者，支撑结构对应三个倾斜部设置。并且，支撑结构在倾斜部上的设置也不限于连续的结构。例如，多个支撑结构间隔设置于一个倾斜部的表面，以对反射层的局部进行支撑；或者，针对反射层的底部的四个角落处，设置支撑结构，以防止反射层在四角处的下榻或鼓包。
需要说明的是，上述实施例所采用的反射纸，在不超出本申请技术方案的精神和范围的前提下，可以做出适当的变形。即，在反射层的背面可设置涂布层、胶带、支撑结构中任意二者或三者的组合，并且涂布层、胶带、支撑结构中任意一个均可以为全部覆盖倾斜部的背面或局部覆盖倾斜部的背面。例如，在倾斜部的背面局部或全部设置涂布层后，再在涂布层上设置支撑结构；或者，在倾斜部的背面局部或全部贴附胶带后，再在胶带上设置支撑结构；或者，倾斜部的局部区域设置有涂布层，局部区域设置有胶带，局部区域设置有支撑结构等。
本申请实施例中，通过对反射纸的反射层上设置涂布层、和/或贴附胶带、和/或设置支撑结构，可实现对反射纸的倾斜部的有效支撑，可有效改善反射纸的边缘塌陷或边缘鼓包的问题，进而改善应用其的显示装置的显示效果。同时，相较于整面反射纸的设计，本申请实施例中，针对反射纸的局部位置进行改进，可有效降低材料成本。
以上实施方式仅用以说明本申请的技术方案而非限制，尽管参照以上较佳实施方式对本申请进行了详细说明，本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或等同替换都不应脱离本申请技术方案的精神和范围。

Claims (39)

  1. 一种反射纸，其特征在于，包括：
    反射层，所述反射层包括底部以及围绕所述底部延伸的倾斜部，所述倾斜部与所述底部之间具有折线，当沿所述折线折叠所述反射纸时，所述倾斜部沿所述底部的四周边缘朝向远离所述底部的一侧倾斜，所述底部与所述倾斜部配合形成一容置空间，所述底部间隔设置有多个通孔，所述倾斜部包括朝向所述容置空间的正面以及与所述正面相对的背面，所述正面用于反射光线；以及
    涂布层，所述涂布层设置于所述反射层上，以增加所述反射纸的挺度。
  2. 根据权利要求1所述的反射纸，其特征在于，所述涂布层的材料为透明固化胶，所述透明固化胶设置于所述背面和/或所述正面。
  3. 根据权利要求1所述的反射纸，其特征在于，所述涂布层的材料为白色固化胶，所述白色固化胶设置于所述背面。
  4. 根据权利要求1所述的反射纸，其特征在于，所述涂布层的厚度为50μm～200μm。
  5. 根据权利要求1至4中任意一项所述的反射纸，其特征在于，所述涂布层完全覆盖所述反射层上。
  6. 根据权利要求5所述的反射纸，其特征在于，所述反射纸还包括胶带，所述胶带贴附于所述涂布层背离所述反射层的一侧。
  7. 根据权利要求1至4中任意一项所述的反射纸，其特征在于，所述涂布层局部覆盖所述反射层上。
  8. 根据权利要求7所述的反射纸，其特征在于，所述反射纸还包括胶带，所述胶带与所述涂布层同层设置，且所述胶带贴附于所述反射层上未覆盖所述涂布层的位置。
  9. 根据权利要求1所述的反射纸，其特征在于，所述反射纸还包括支撑结构，所述支撑结构包括固定于所述背面的一侧的固定面、连接所述固定面并与所述背面呈第一预设夹角的支撑面、以及连接所述固定面并与所述背面呈第二预设夹角的过渡面。
  10. 根据权利要求9所述的反射纸，其特征在于，沿垂直于所述背面的方向上，所述支撑结构的截面中，所述固定面、所述支撑面及所述过渡面围合呈直角三角形。
  11. 根据权利要求9所述的反射纸，其特征在于，所述支撑结构还包括连接所述过渡面和所述支撑面之间的贴合面。
  12. 根据权利要求11所述的反射纸，其特征在于，沿垂直于所述背面的方向上，所述支撑结构的截面中，所述固定面、所述支撑面、所述贴合面及所述过渡面围合呈直角梯形，所述固定面为所述直角梯形的长边，所述贴合面为所述直角梯形的短边。
  13. 根据权利要求9至12中任意一项所述的反射纸，其特征在于，所述支撑结构还包括连接所述支撑面并延伸覆盖所述背面的第一延展面、以及连接所述过渡面并延伸覆盖所述背面的第二延展面。
  14. 根据权利要求13所述的反射纸，其特征在于，所述第一延展面和所述第二延展面通过压合固定成型于所述反射层上。
  15. 根据权利要求9所述的反射纸，其特征在于，所述第一预设夹角的范围为10度～90度，所述第二预设夹角的范围为10度～90度。
  16. 根据权利要求9所述的反射纸，其特征在于，所述支撑结构包括有机基材及分散于所 述有机基材中的多个无机粒子。
  17. 根据权利要求16所述的反射纸，其特征在于，所述有机基材的厚度为50μm～300μm。
  18. 一种背光模组，其特征在于，包括：
    背板，所述背板包括底板以及围绕所述底板并沿所述底板的四周边缘朝向远离所述底板的一侧倾斜延伸形成的侧板；
    多个发光元件，位于所述底板上；以及
    根据权利要求1至17中任意一项所述的反射纸，所述倾斜部搭接于所述侧板上，所述底部位置对应所述底板，每一所述发光元件从一个所述通孔处暴露出并位于所述容置空间内。
  19. 根据权利要求18所述的背光模组，其特征在于，所述反射纸包括支撑结构的情况下，所述支撑结构抵持所述侧板。
  20. 根据权利要求19所述的背光模组，其特征在于，所述支撑结构包括贴合面的情况下，所述贴合面与所述侧板通过胶层贴合。
  21. 一种显示装置，其特征在于，包括：
    液晶显示面板；以及
    根据权利要求18至20中任意一项所述的背光模组，其中，所述背光模组位于所述液晶显示面板背离其显示面的一侧。
  22. 一种反射纸，其特征在于，包括：
    反射层，所述反射层包括底部以及围绕所述底部延伸的倾斜部，所述倾斜部与所述底部之间具有折线，当沿所述折线折叠所述反射纸时，所述倾斜部沿所述底部的四周边缘朝向远离所述底部的一侧倾斜，所述底部与所述倾斜部配合形成一容置空间，所述底部间隔设置有多个通孔，所述倾斜部包括朝向所述容置空间的正面以及与所述正面相对的背面，所述正面用于反射光线；以及
    涂布层，所述涂布层设置于所述反射层上，以增加所述反射纸的挺度；
    所述反射纸还包括支撑结构，所述支撑结构包括固定于所述背面的一侧的固定面、连接所述固定面并与所述背面呈第一预设夹角的支撑面、连接所述固定面并与所述背面呈第二预设夹角的过渡面、连接所述支撑面并延伸覆盖所述背面的第一延展面、以及连接所述过渡面并延伸覆盖所述背面的第二延展面；
    其中，所述第一延展面和所述第二延展面通过压合固定成型于所述反射层上。
  23. 根据权利要求22所述的反射纸，其特征在于，所述涂布层的材料为透明固化胶，所述透明固化胶设置于所述背面和/或所述正面。
  24. 根据权利要求22所述的反射纸，其特征在于，所述涂布层的材料为白色固化胶，所述白色固化胶设置于所述背面。
  25. 根据权利要求22所述的反射纸，其特征在于，所述涂布层的厚度为50μm～200μm。
  26. 根据权利要求22至25中任意一项所述的反射纸，其特征在于，所述涂布层完全覆盖所述反射层上。
  27. 根据权利要求26所述的反射纸，其特征在于，所述反射纸还包括胶带，所述胶带贴附于所述涂布层背离所述反射层的一侧。
  28. 根据权利要求22至25中任意一项所述的反射纸，其特征在于，所述涂布层局部覆盖所述反射层上。
  29. 根据权利要求28所述的反射纸，其特征在于，所述反射纸还包括胶带，所述胶带与 所述涂布层同层设置，且所述胶带贴附于所述反射层上未覆盖所述涂布层的位置。
  30. 根据权利要求22所述的反射纸，其特征在于，沿垂直于所述背面的方向上，所述支撑结构的截面中，所述固定面、所述支撑面及所述过渡面围合呈直角三角形。
  31. 根据权利要求22所述的反射纸，其特征在于，所述支撑结构还包括连接所述过渡面和所述支撑面之间的贴合面。
  32. 根据权利要求31所述的反射纸，其特征在于，沿垂直于所述背面的方向上，所述支撑结构的截面中，所述固定面、所述支撑面、所述贴合面及所述过渡面围合呈直角梯形，所述固定面为所述直角梯形的长边，所述贴合面为所述直角梯形的短边。
  33. 根据权利要求22所述的反射纸，其特征在于，所述第一预设夹角的范围为10度～90度，所述第二预设夹角的范围为10度～90度。
  34. 根据权利要求22所述的反射纸，其特征在于，所述支撑结构包括有机基材及分散于所述有机基材中的多个无机粒子。
  35. 根据权利要求34所述的反射纸，其特征在于，所述有机基材的厚度为50μm～300μm。
  36. 一种背光模组，其特征在于，包括：
    背板，所述背板包括底板以及围绕所述底板并沿所述底板的四周边缘朝向远离所述底板的一侧倾斜延伸形成的侧板；
    多个发光元件，位于所述底板上；以及
    根据权利要求22至35中任意一项所述的反射纸，所述倾斜部搭接于所述侧板上，所述底部位置对应所述底板，每一所述发光元件从一个所述通孔处暴露出并位于所述容置空间内。
  37. 根据权利要求36所述的背光模组，其特征在于，所述支撑结构抵持所述侧板。
  38. 根据权利要求37所述的背光模组，其特征在于，所述支撑结构包括贴合面的情况下，所述贴合面与所述侧板通过胶层贴合。
  39. 一种显示装置，其特征在于，包括：
    液晶显示面板；以及
    根据权利要求36至38中任意一项所述的背光模组，其中，所述背光模组位于所述液晶显示面板背离其显示面的一侧。
PCT/CN2022/116616 2021-12-13 2022-09-01 反射纸、背光模组及显示装置 WO2023109197A1 (zh)

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