WO2023272482A1 - 背光组件、显示面板及显示装置 - Google Patents

背光组件、显示面板及显示装置 Download PDF

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Publication number
WO2023272482A1
WO2023272482A1 PCT/CN2021/103071 CN2021103071W WO2023272482A1 WO 2023272482 A1 WO2023272482 A1 WO 2023272482A1 CN 2021103071 W CN2021103071 W CN 2021103071W WO 2023272482 A1 WO2023272482 A1 WO 2023272482A1
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WO
WIPO (PCT)
Prior art keywords
light guide
light
guide plate
backlight assembly
display
Prior art date
Application number
PCT/CN2021/103071
Other languages
English (en)
French (fr)
Inventor
付常佳
李丹
石海军
王伯长
董飞
张恩亮
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
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.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Priority to PCT/CN2021/103071 priority Critical patent/WO2023272482A1/zh
Priority to US18/005,098 priority patent/US20230266617A1/en
Priority to CN202180001743.9A priority patent/CN115735153A/zh
Publication of WO2023272482A1 publication Critical patent/WO2023272482A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • 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
    • G02F1/13336—Combining plural substrates to produce large-area displays, e.g. tiled displays
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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

  • At least one embodiment of the present disclosure relates to a backlight assembly, a display panel and a display device.
  • Liquid crystal display panels usually have a backlight to provide the light required for display.
  • the backlight such as a direct-type backlight or an edge-type backlight, often enters less light from the backlight into the edge of the display area of the display panel, resulting in The brightness at the edge of the display area of the panel is low, and the display screen is dark.
  • a large-sized liquid crystal display panel may be spliced by a plurality of small-sized sub-display panels, each sub-display panel is provided with a backlight, and the edges of the display areas of two adjacent sub-display panels are respectively located at the The two adjacent sub-display panels are directly on the two sides of the seam, therefore, the display brightness on the two sides of the seam is relatively low.
  • a backlight assembly which includes: a working area, a light emitting element, a light guide plate and a light guide structure.
  • the working area includes a middle area and an edge area surrounding the middle area; the light-emitting element is located at least in the middle area; the light guide plate is located in the working area, and is configured to guide the light emitted by the light-emitting element and emit the light from the working area; the light guide structure is located on the light guide plate Close to one side of the light-emitting element and disposed along at least part of the edge of the light-guiding plate, the light-guiding structure is configured to allow a part of the light emitted by the light-emitting element to enter the edge region.
  • the backlight assembly provided by the embodiments of the present disclosure can improve the uniformity of light in the edge area of the working area and increase the brightness of the edge area of the working area, so as to correspondingly improve the light-emitting state of the edge of the display area of the display panel to which the backlight assembly is applied.
  • the working area is the light exit area.
  • the light guide plate has a bottom surface facing the light-emitting element, and the orthographic projection of the light guide structure on the surface where the bottom surface of the light guide plate is located is at least partially located inside the bottom surface of the light guide plate.
  • the light guide plate has a bottom surface facing the light-emitting element, and the light guide structure is in direct contact with the bottom surface of the light guide plate and protrudes from the light guide plate. the underside.
  • the light guide structure is transparent;
  • the backlight assembly includes a plurality of the light guide structures, and the plurality of light guide structures are arranged along the The edges of the light-guiding structures are distributed at intervals, and the plurality of light-guiding structures are configured such that the light emitted by the light-emitting element passes through the plurality of light-guiding structures at the plurality of light-guiding structures and passes through the adjacent light-guiding structures.
  • the space between the structures reaches the edge region through the light guide plate.
  • the light guide structure is light-transmissive; the light guide structure is a continuous strip extending along the edge of the light guide plate, and the light guide structure It is configured such that the light emitted by the light emitting element reaches the edge region through the light guide structure and the light guide plate.
  • the light guide structure is opaque; the backlight assembly includes a plurality of the light guide structures, and the plurality of light guide structures Edges of the light plates are spaced apart from each other, and the light guide structure is configured so that the light emitted by the light emitting element passes through the light guide plate at the interval between adjacent light guide structures and reaches the edge region.
  • the extending direction of the edge of the light guide plate is a first direction; in the first direction, the length of the interval between adjacent light guide structures is greater than the length of each of the light guiding structures.
  • the ratio of the length of the interval to the length of the light guide structure is greater than or equal to 10.
  • the length of the interval is 30mm-50mm; the length of each of the light guide structures is 1mm-2mm.
  • the direction perpendicular to the first direction and within the bottom surface of the light guide plate is the second direction
  • the light guide structure is in the second direction
  • the width is 3mm-5mm.
  • the light guide structure includes: a light guide microstructure, and the light guide microstructure is located on a surface of the light guide structure facing the light guide plate.
  • the backlight assembly provided in at least one embodiment of the present disclosure further includes a support structure, and the support structure includes a first support portion; the first support portion is located on the side of the light guide plate close to the light emitting element, and includes The direction of the bottom surface faces the first support surface of the light guide plate, and is configured to support the light guide plate, the light guide plate has a bottom surface facing the light-emitting element, and the light guide structure is located on the first support surface and the bottom surface of the light guide plate, and is fixedly connected with the first supporting surface.
  • the light guide structure includes a first part and a second part.
  • the orthographic projection of the first part on the plane where the first support surface is located does not overlap with the first support surface; the second part is fixedly connected to the first support surface and is on the plane where the first support surface is located.
  • the second part of the light guide structure is connected to the first supporting surface by plugging;
  • the first supporting surface includes a first groove
  • the surface of the second part of the light guide structure facing the first support surface includes a first protrusion
  • the first protrusion is located in the first groove
  • the shape of the first protrusion is the same as
  • the shapes of the first grooves are complementary, or the first supporting surface includes a second protrusion, and the surface of the second part of the light guiding structure facing the first supporting surface includes a second groove, so The second protrusion is located in the second groove, and the shape of the second protrusion is complementary to that of the second groove.
  • the direction from the light-emitting element to the light guide plate is a third direction; the cross-sectional area of the protrusion perpendicular to the third direction is along the direction
  • the third direction gradually decreases, or, the section of the protrusion perpendicular to the third direction includes a bent portion.
  • the support structure is opaque, and when the light guide structure is opaque, the material of the light guide structure is the same as that of the support structure. And integrally formed.
  • the backlight assembly provided by at least one embodiment of the present disclosure further includes a frame area at least partially surrounding the working area; the support structure further includes a second support portion connected to the first support portion and located in the frame area; the side of the second support portion facing the light guide plate intersects with the first support surface, and is in contact with at least one of the edge of the light guide plate and the light guide structure, or spaced from each other.
  • the backlight assembly provided in at least one embodiment of the present disclosure further includes a base plate, the light emitting element is located on the base plate, and the first supporting portion is connected to the base plate.
  • At least one embodiment of the present disclosure provides a display panel, including a display substrate and any one of the backlight assemblies provided by the embodiments of the present disclosure, the display substrate is located on a side of the light guide plate away from the light emitting element.
  • the display panel includes a display surface, the display surface includes a display area and a non-display area at least partially surrounding the display area, and the display area is located on the In the orthographic projection of the working area of the backlight assembly on the display surface; the backlight assembly is configured to: make the light emitted by the light-emitting element enter the display area, and the light entering the edge area of the backlight assembly Entering the edge area of the display area; the orthographic projection of the light guide structure on the display surface is at least partially located at the edge area of the display area.
  • the display panel when the display panel includes a support structure and the support structure includes a first support portion and a second support portion, the first support portion is configured to support the In the light guide plate, the second support portion is configured to support the display substrate, and an orthographic projection of the second support portion on the display surface of the display substrate is located in the non-display area.
  • the display panel provided by at least one embodiment of the present disclosure includes multiple display substrates, the multiple display substrates are spliced together, the edges of adjacent display substrates face each other, and there are seams between adjacent display substrates ; providing the backlight assembly for each of the plurality of display substrates, and the light guide structure is located on at least one side of the seam.
  • At least one embodiment of the present disclosure provides a display device, and the display device includes any display panel provided by the embodiments of the present disclosure.
  • FIG. 1 is a schematic plan view of a backlight assembly provided by an embodiment of the present disclosure
  • Fig. 2A is a schematic cross-sectional view along the line A-A' in Fig. 1;
  • Fig. 2B is a schematic cross-sectional view along the line B-B' in Fig. 1;
  • FIG. 2C is a schematic diagram of a part of the backlight assembly shown in FIG. 1 including a light guide structure;
  • FIG. 3A is a schematic diagram of a backlight assembly for adjusting light according to an embodiment of the present disclosure
  • FIG. 3B is a second schematic diagram of light adjustment by a backlight assembly provided by an embodiment of the present disclosure.
  • FIG. 3C is a diagram showing that the brightness of the edge of the display area corresponding to the edge area near the seam of the spliced display panel is relatively dark;
  • FIG. 3D is an effect diagram of improving the brightness of the edge of the display area corresponding to the edge area near the seam of a spliced display panel using the backlight assembly provided by an embodiment of the present disclosure
  • Fig. 4A is an enlarged schematic diagram along a part L in Fig. 2A;
  • Fig. 4B is another enlarged schematic diagram along the part L in Fig. 2A;
  • Fig. 4C is another enlarged schematic diagram along the part L in Fig. 2A;
  • FIG. 5A is a schematic plan view of another backlight assembly provided by an embodiment of the present disclosure.
  • FIG. 5B is a schematic plan view of another backlight assembly provided by an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of another light guide structure of a backlight assembly provided by an embodiment of the present disclosure.
  • FIG. 7 is a schematic plan view of a display panel provided by an embodiment of the present disclosure.
  • Fig. 8 is a schematic cross-sectional view along the line C-C' in Fig. 7;
  • FIG. 9A is a schematic plan view of another display panel provided by an embodiment of the present disclosure.
  • FIG. 9B is a schematic plan view of another spliced display panel including seams according to an embodiment of the present disclosure.
  • FIG. 9C is a schematic diagram of the optical film layer P in FIG. 9B;
  • FIG. 10 is a schematic diagram of a display device provided by an embodiment of the present disclosure.
  • a backlight assembly which includes: a working area, a light emitting element, a light guide plate and a light guide structure.
  • the working area includes a middle area and an edge area surrounding the middle area; the light-emitting element is located at least in the middle area; the light guide plate is located in the working area, and is configured to guide the light emitted by the light-emitting element and emit the light from the working area; the light guide structure is located on the light guide plate Close to one side of the light-emitting element and disposed along at least part of the edge of the light-guiding plate, the light-guiding structure is configured to allow a part of the light emitted by the light-emitting element to enter the edge region.
  • the backlight assembly provided by the embodiments of the present disclosure can improve the uniformity of light in the edge area of the working area and increase the brightness of the edge area of the working area, so as to correspondingly improve the light-emitting state of the edge of the display area of the display panel to which the backlight assembly is applied.
  • the working area is the light exit area.
  • FIG. 1 is a schematic plan view of a backlight assembly provided by an embodiment of the present disclosure
  • FIG. 2A is a schematic cross-sectional view along line AA' in FIG. 1
  • FIG. 2B is a schematic cross-sectional view along line B-B in FIG. 1
  • FIG. 2C is a partial schematic view of the backlight assembly shown in FIG. 1 including the light guide structure.
  • the backlight assembly 10 includes: a working area 1 , a light emitting element 3 , a light guide plate 4 and a light guide structure 5 .
  • the working area 1 includes an intermediate area 1A and an edge area 1B surrounding the intermediate area 1A.
  • the working area 1 is a light emitting area; the edge area 1B is a part of the working area 1 close to the edge of the working area 1 , an area near the edge.
  • the light emitting element 3 is at least located in the middle area 1A;
  • the backlight assembly 10 includes a plurality of light emitting elements 3 located in the middle area 1A, for example, the plurality of light emitting elements 3 are distributed in an array.
  • the light-emitting element 3 is an organic light-emitting diode or an inorganic light-emitting diode.
  • the disclosure does not limit the type and specific position of the light-emitting element 3 .
  • the light guide plate 4 is located in the working area 1 and is configured to guide the light emitted by the light emitting element 3 and make the light exit from the working area 1 .
  • the light guide plate 4 is located in the entire working area 1 and the entire working area 1 is provided with the light guide plate 4, that is, the area where the light guide plate 4 is located and the working area 1 are two areas equal to each other, that is, the light guide plate 4 emits light parallel to it.
  • the orthographic projection on the plane of the surface coincides with the orthographic projection of the working area 1 on the plane parallel to the light exit.
  • the light guide plate 4 is configured to homogenize or diffuse the light from the light-emitting element 3; the light guide plate can not only be an integrated plate structure, for example, the light guide plate can also include or be a diffusion film layer, for example The diffusion film layer includes scattering particles to homogenize or diffuse the light from the light emitting element 3 .
  • the light guide structure 5 is located on the side of the light guide plate 4 close to the light-emitting element 3 and is arranged along at least part of the edge of the light guide plate 4 .
  • the light guide structure 5 is configured to allow a part of the light emitted by the light-emitting element 3 to enter the edge region 1B.
  • the brightness of the edge area of the working area of the backlight assembly is low, so when the backlight assembly is applied to the display panel, the display area corresponding to the edge area has low display brightness, resulting in uneven display brightness and affecting the display effect.
  • the light guide structure 5 of the backlight assembly 10 provided by the embodiment of the present disclosure can raise the light guide plate 4 in the height direction D3 shown in FIG. problem, thereby improving the uniformity of light in the edge area 1B of the working area 1 and increasing the brightness of the edge area 1B of the working area 1, so as to correspondingly improve the brightness of the display area of the display panel using the backlight assembly 10 provided by the embodiment of the present disclosure.
  • the light-emitting state of the edge achieves a display effect with uniform brightness.
  • FIG. 3A is a schematic diagram 1 of adjusting light by a backlight assembly provided by an embodiment of the present disclosure
  • FIG. 3B is a schematic diagram 2 of adjusting light by a backlight assembly provided by an embodiment of the present disclosure.
  • 3A-3B since the light guide structure 5 can raise the light guide plate 4 in the height direction D3, more light, especially the light LB2 with a larger incident angle incident on the light guide structure 5 and the light guide plate 4 /LB3 can pass through the light guide plate 4 through the space 11 / 12 near the light guide structure 5 to exit from the edge area 1B, thereby achieving the effect of improving the brightness of the edge area 1B. It can be compared with that shown in FIG.
  • the backlight assembly 10 provided by the embodiment of the present disclosure can make more light exit from the edge area 1B, thereby improving the above-mentioned problem of low brightness of the edge area 1B.
  • the light LB1 enters the light guide plate 4 at intervals between multiple light guide structures 5 , and enters the edge region 1B after multiple reflections in the light guide plate 4 , so as to improve the above-mentioned problem of low brightness in the edge region 1B.
  • FIG. 3C is an illustration of the edge of the display area corresponding to the edge area near the seam of a tiled display panel with darker brightness
  • FIG. 3D is a seam of a tiled display panel using the backlight assembly provided by an embodiment of the present disclosure
  • the spliced display panel is formed by splicing a plurality of sub-display panels.
  • the black line in the figure is the seam between two adjacent sub-display panels.
  • the edge of the display area corresponding to the edge area 1B can be seen by comparing the brightness of the edge of the display area in FIG. 3C and FIG.
  • the brightness of the edge of the display area corresponding to the edge area is relatively high, and the phenomenon that the brightness of the edge of the display area on both sides of the seam is relatively dark is basically invisible, which improves the display effect.
  • FIG. 5A is a schematic plan view of another backlight assembly provided by an embodiment of the present disclosure.
  • the light guide structure 5 is arranged along some sides of the light guide plate, for example, along two opposite sides. set up. Those skilled in the art can set according to the position where the brightness needs to be improved.
  • the overall planar shape of the backlight assembly 10 and the planar shape of the light guide plate 4 are not limited to rectangles, and may also be other polygons, circles, irregular figures, etc. 4 marginal distributions.
  • the light guide plate 4 has a bottom surface 41 facing the light-emitting element 3, and a part of the orthographic projection of the light guide structure 5 on the surface where the bottom surface 41 of the light guide plate 4 is located is located in the bottom surface 41 of the light guide plate 4, that is The light guide structure 5 protrudes from the edge of the light guide plate 4 in a direction parallel to the bottom surface 41 .
  • FIG. 4B is an enlarged schematic view along a part L in FIG. 2A .
  • the orthographic projection of the entire light guide structure 5 on the surface where the bottom surface 41 of the light guide plate 4 is located is located within the bottom surface 41 of the light guide plate 4 . Therefore, the light guide structure 5 does not protrude from the edge of the light guide plate 4 in a direction parallel to the bottom surface 41 , so that the backlight assembly 10 has a narrower frame, so that the display panel using the backlight assembly 10 has a narrower frame.
  • the light guide structure 5 is in direct contact with the bottom surface 41 of the light guide plate 4 and protrudes from the bottom surface 41 of the light guide plate 4 .
  • the height of the light guide structure 5 protruding from the bottom surface 41 is 1mm-2mm. It has been verified by experiments that this height range can obtain a more ideal dimming effect; D3 is used to heighten the light guide plate 4 for dimming, so that an ideal dimming effect cannot be obtained. If the height is too large, the modulation of light will be too large and the backlight assembly will increase unnecessarily in the third direction D3. The thickness is unfavorable for using the backlight assembly to make thin and light devices such as thin and light display panels. Of course, the embodiments of the present disclosure do not limit the height range.
  • the light guiding structure 5 is light-transmissive.
  • the backlight assembly 10 includes a plurality of light guide structures 5, the plurality of light guide structures 5 are spaced apart from each other along the edge of the light guide plate 4, and the plurality of light guide structures 5 are configured to make the light emitted by the light emitting element 3
  • the multiple light guide structures 5 pass through the multiple light guide structures 5 or pass through the light guide structures and the light guide plate in sequence, and pass through the light guide plate 4 at intervals between adjacent light guide structures 5 to reach the edge region 1B.
  • a plurality of light guide structures 5 are distributed at intervals along the edge of the light guide plate 4 , which is beneficial to improve the light transmittance while improving the light brightness of the edge region 1B.
  • the distribution density of the plurality of light guide structures 5 is the same, that is, adjacent light guide structures 5
  • the spacing between the light structures 5 is equal and evenly distributed, so as to meet the requirement of uniformly adjusting the light output brightness of the edge area 1B; or, the distribution density of multiple light guide structures 5 is different, so as to be suitable for the uneven brightness of the edge area 1B.
  • Situations for example, at the position where the brightness of the edge region 1B is low, the distribution density of the light guide structure 5 is relatively large, and at the position where the brightness of the edge region 1B is high, the distribution density of the light guide structure 5 is relatively small.
  • FIG. 5B is a schematic plan view of another backlight assembly provided by an embodiment of the present disclosure.
  • the light guide structure 5 is light-transmissive; the light guide structure 5 is a continuous strip extending along the edge of the light guide plate 4, and the light guide structure 5 is configured to allow the light emitted by the light emitting element 3 to pass through the light guide structure.
  • the light structure 5 and the light guide plate 4 reach the edge area 1B.
  • the light guide structure 5 is a continuous strip extending along the edge of the light guide plate 4 , which is beneficial to better improve the light output brightness of the edge region 1B.
  • the improvement of the brightness of the edge region 1B by the light guide structure 5 is not only through the above-mentioned way of raising the light guide plate 4 , but also through refraction.
  • the light guide structure 5 has a bottom surface facing the light-emitting element 3, and the incident angle of the light LB5 from the light-emitting element 3 entering the bottom surface of the light guide structure 5 is relatively large. If there is no light guide structure 5, the incident angle is relatively large. The large light LB5 will not reach the edge area 1B.
  • the light LB5 is refracted for the first time on the bottom surface of the light guide structure 5, and the first refraction angle ⁇ 1 is smaller than the incident angle, so that the light LB5 deviates toward the direction close to the middle area 1A and enters the edge Area 1B.
  • the light LB5 passes through the light guide structure 5 and is incident on the light guide plate 4, thereby Emerge from the backlight assembly 10; light LB5 refracts for the second time on the interface between the light guide structure 5 and the light guide plate 4, for example, the refractive index of the light guide plate 4 is N1, and the refractive index of the light guide structure 5 is N2, for example, N1 ⁇ N2, so that the second refraction angle ⁇ 2 is smaller than the first refraction angle ⁇ 1, that is, after the second refraction, the light LB5 further deviates toward the direction close to the middle region 1A and enters the edge region 1B, so that the light with a larger incident angle
  • the light LB5 enters the edge area 1B, increasing the amount of light entering the edge area 1B, and improving the brightness of the edge area 1B is
  • the material of the light-transmitting light guide structure 5 may include at least one of transparent materials such as polymethyl methacrylate (PMMA), polycarbonate (PC), and the like.
  • PMMA polymethyl methacrylate
  • PC polycarbonate
  • the embodiment of the present disclosure does not limit the material of the opaque light guide structure 5 .
  • the light guide structure 5 can also be opaque; the backlight assembly 10 includes a plurality of light guide structures 5, and the plurality of light guide structures 5 are arranged along The edges of the light plates 4 are spaced apart from each other, and the light guide structures 5 are configured so that the light emitted by the light emitting elements 3 passes through the light guide plates 4 at the intervals between adjacent light guide structures 5 and reaches the edge region 1B.
  • the light guide structure 5 raises the light guide plate 4 in the height direction D3, so that more light LB2/LB3 incident on the light guide plate 4 with a relatively large incident angle passes through the light guide plate 4.
  • the space 11 / 12 near the light structure 5 passes through the light guide plate 4 to emit from the edge area 1B, so as to achieve the effect of improving the brightness of the edge area 1B.
  • the material of the opaque light guide structure 5 may include at least one of opaque materials such as aluminum extruded or plastic.
  • the embodiment of the present disclosure does not limit the material of the opaque light guide structure 5 .
  • the extending direction of the edge of the light guide plate 4 is the first direction D1; it should be noted that, for each side of the light guide plate 4, there is a first direction D1, and different directions extending along different directions
  • the first directions D1 defined by the sides are different.
  • the first directions D1 defined by the four sides of the rectangular light guide plate 4 are different.
  • the length g of the interval between adjacent light guide structures 5 is greater than the length l of each light guide structure 5.
  • the ratio of the length g of the interval between adjacent light guiding structures 5 to the length l of the light guiding structures 5 is greater than or equal to 10.
  • the length g of the interval between adjacent light guide structures 5 is 30mm-50mm.
  • the value range of the length g is the most ideal range while achieving an ideal increase in the brightness of the edge region 1B and at the same time making the light guide structure 5 not too difficult. If the length g is too large, the ideal effect of improving the brightness of the edge region 1B cannot be achieved; if the length g is too small, the brightness of the edge region 1B will be excessively adjusted, and the manufacturing difficulty of the light guide structure 5 will be increased.
  • the length l of each light guiding structure 5 is 1mm-2mm.
  • the direction perpendicular to the first direction D1 and within the bottom surface of the light guide plate 4 is the second direction D2
  • the width w1 of the light guide structure 5 in the second direction D2 is 3 mm-5 mm.
  • FIG. 6 is a schematic diagram of another light guiding structure of a backlight assembly provided by an embodiment of the present disclosure.
  • the light guide structure 5 includes a light guide microstructure 52, and the light guide microstructure 52 is located on the surface of the light guide structure 5 facing the light guide plate 4, so as to use the light guide microstructure 52 to control the light incident to the light guide plate 4.
  • the light in the structure 5 is diffused to obtain a better diffusion effect, so that more light enters the edge region 1B, thereby achieving a better effect of improving the brightness of the edge region 1B.
  • the light guide structure 5 includes a base 51 and a light guide microstructure 52 on the base, and the light guide microstructure 52 is located on a side of the base 51 facing the light guide plate 4 .
  • the light guide microstructure 52 includes a plurality of first microstructure units 520 periodically distributed on the substrate 51 (the cross section in FIG. 6 is a triangle).
  • the light guide structure 5 further includes a second microstructure unit 530 filled between the plurality of first microstructure units 520, so that the surfaces of the plurality of first microstructure units 520 are flat, so that the light guide microstructure 52 can It is more firmly combined with the light guide plate 4 ; for example, the shape of the second microstructure unit 530 is complementary to the shape of the first microstructure unit 520 .
  • the light guide microstructure 52 is a two-dimensional grating or a three-dimensional grating. Regarding the specific design of the light guide microstructure 52, those skilled in the art may refer to conventional techniques in the art.
  • the backlight assembly 10 further includes a supporting structure 6 .
  • the support structure 6 includes a first support portion 61, the first support portion 61 is located on the side of the light guide plate 4 close to the light-emitting element 3, includes the first support surface 4A above the light guide plate 4 in a direction perpendicular to the bottom surface, and is configured to support Light guide plate 4.
  • the light guide structure 5 and the first supporting portion 61 jointly play the role of supporting the light guide plate 4 .
  • the first supporting surface 4A is strip-shaped, and the strip extends along a direction perpendicular to the first direction D1 and the three directions D3.
  • the first supporting surface 4A may also include multiple parts spaced apart from each other, and each part corresponds to a light guide structure, that is, the multiple parts spaced apart from each other on the first supporting surface 4A are also arranged along the first direction D1, similar to The arrangement of the plurality of light guide structures 5 spaced apart from each other is connected in a one-to-one correspondence with the plurality of light guide structures 5 spaced apart from each other.
  • the light guide structure 5 is located between the first support surface 4A and the bottom surface 41 of the light guide plate 4 , and is fixedly connected to the first support surface 4A, so that the light guide structure 5 and the first support portion 61 together firmly support the light guide plate 4 .
  • the light guiding structure 5 includes a first part and a second part.
  • the orthographic projection of the first part on the plane where the first supporting surface 4A is located does not overlap with the first supporting surface 4A, and the first part extends beyond the first supporting surface in the width direction; the second part is fixedly connected with the first supporting surface 4A and The orthographic projection on the plane where the first support surface 4A is located overlaps with the first support surface 4A.
  • the light guide structure 5 is transparent and the first support portion 61 is opaque, for example, the light guide structure 5 is transparent, and the light from the light emitting element 3 can enter the edge region of the display area through the first part of the light guide structure 5 .
  • Fig. 4A is a kind of enlarged schematic diagram along the local L in Fig. 2A;
  • Fig. 4B is another kind of enlarged schematic diagram along the local L among Fig. 2A;
  • Fig. 4C is another kind of enlarged schematic diagram along the local L among Fig. 2A.
  • the second part of the light guide structure 5 is connected to the first support surface 4A by plugging;
  • the first support surface 4A includes a first groove 71, and the second part of the light guide structure 5
  • the surface facing the first supporting surface 4A includes a first protrusion 72 located in the first groove 71 , and the shape of the first protrusion 72 is complementary to that of the first groove 71 .
  • the assembly of the light guide structure 5 and the first support portion 61 in this way does not require locking and pasting operations, the structural connection is firm, the assembly is simple, and the cost is low.
  • the direction from the light emitting element 3 to the light guide plate 4 is the third direction D3, and the area of the section of the first protrusion 72 perpendicular to the third direction decreases gradually along the third direction D3, so that The connection between the first protrusion 72 and the first groove 71 is more stable, and the first protrusion 72 is not easy to disengage from the first groove 71 .
  • the first protrusion 72 has a bent portion, for example, the section of the first protrusion 72 perpendicular to the third direction D3 includes a bent portion, so that the first protrusion 72 The connection with the first groove 71 is more stable, and the first protrusion 72 is not easy to disengage from the first groove 71 .
  • the first support surface 4A includes a second protrusion 82
  • the surface of the second part of the light guide structure 5 facing the first support surface 4A includes a second groove 81
  • the second protrusion 82 Located in the second groove 81 , the shape of the second protrusion 82 is complementary to that of the second groove 81 .
  • the backlight assembly 10 further includes a frame area 2 at least partially surrounding the working area 1 , and the frame area 2 is non-luminous, that is, no light is emitted from the frame area 2 .
  • the first support surface 4A is too narrow, that is, the width w2 of the first support surface 4A in the second direction D2 is too small, it will cause the light guide plate 4 to move from the first position during the low-temperature storage test or due to assembly errors.
  • the problem of falling off on the support part 61 For example, as shown in FIG.
  • the incident amount of light in the edge area 1B increases the brightness of the surrounding image.
  • the support structure 6 is opaque, and in the case of the light guide structure 5 being opaque, the light guide structure 5 and the support structure 6 are made of the same material and integrally formed.
  • the material of the support structure 6 is a metal material such as aluminum, copper, aluminum alloy, copper alloy, steel, etc., or an organic material such as plastic.
  • each light guide structure 5 is connected to the first support surface 4A through at least one first groove 71, therefore, each bar corresponding to the light guide plate 4 is provided with each other.
  • each elongated light guide structure 5 is connected to the first supporting surface 4A through a plurality of first grooves 71 , therefore, corresponding to each of the light guide plate 4
  • the strip is provided with the edge of the light guide structure 5 , and there are a plurality of first grooves 71 arranged along the edge of the light guide plate 4 .
  • the support structure 6 further includes a second support portion 62 connected to the first support portion 61 and located in the frame area 2 , the side of the second support portion 62 facing the light guide plate 4 is in contact with the first support surface 4A Intersect, and contact with at least one of the edge of the light guide plate 4 and the light guide structure 5 or be spaced apart from each other.
  • the side of the second support portion 62 facing the light guide plate 4 is perpendicular to the first support surface 4A; for example, the second support portion 62 and the first support portion 61 form a stepped structure.
  • the first groove 71 is made on the first supporting surface 4A, and the first groove 71 can be formed by an extrusion molding process;
  • the light guide structure 5 connected to the surface 4A.
  • the first groove 71 is made on the first support surface 4A, and the first groove 71 can be formed by extrusion molding process; then, the light guide structure 5 is formed on the first support surface 4A by a dispensing and curing process .
  • the light guide structure 5 is formed by injection molding, the first support surface 4A and the bottom surface of the light guide structure 5 facing the first support surface 4A are both flat, and the bottom surface of the light guide structure 5 is attached by double-sided adhesive tape. on the first supporting surface 4A.
  • the support structure 6 is opaque and the light guide structure 5 is light transmittance
  • the light guide structure 5 and the support structure 6 are formed by using a two-color injection molding process, and the light guide structure 5 and the support structure 6 are respectively set as transparent structures and Non-transparent structure.
  • the support structure 6 and the light guide structure 5 are made of opaque materials
  • the support structure 6 and the light guide structure 5 can be made of the same material through an integral molding process.
  • the backlight assembly 10 includes a base plate, wherein the light-emitting element 3 is located on the base plate, and the first support portion 61 is connected to the base plate 9 to realize the fixing of the support structure 6, thereby realizing the support structure 6 and the light guide structure. 5.
  • Fig. 7 is a schematic plan view of a display panel provided by an embodiment of the present disclosure
  • Fig. 8 is a schematic cross-sectional view along line C-C' in Fig. 7
  • the display panel 100 includes a display substrate 103 and any backlight assembly 10 provided by the embodiments of the present disclosure
  • the display substrate 103 is located on The side of the light guide plate 4 away from the light emitting element 3 .
  • the display substrate 103 is a display substrate requiring a backlight such as an LCD display substrate.
  • the display panel 100 includes a display surface (a surface away from the backlight assembly), the display surface includes a display area 101 and a non-display area 102 at least partially surrounding the display area, and the display area 101 is located at the front projection of the working area 1 of the backlight assembly 10 on the display surface Inside; the backlight assembly 10 is configured such that the light emitted by the light emitting element 3 enters the display area, and the light entering the edge area 1B of the backlight assembly 10 enters the edge area 1B of the display area.
  • the orthographic projection of the light guide structure 5 on the display surface is at least partially located in the edge area of the display area 101 .
  • the display panel 100 provided by the embodiment of the present disclosure can improve the uniformity of light in the edge area of the display area 102, and increase the brightness of the edge area of the display area 102, solve the problem that the edge area of the display area 102 is dark, and improve the display quality .
  • the orthographic projection of the projection of the light guide structure 5 on the display surface is all located in the display area 101 , so that the display panel 100 has a narrower frame.
  • the first support portion 61 is configured to support the light guide plate 4
  • the second support portion 62 is configured to support the display substrate 103
  • the orthographic projection of the second support portion 62 on the display surface of the display substrate 103 is located in the non-display area 102, so that The frame of the display panel 100 is narrowed.
  • FIG. 9A is a schematic plan view of another display panel provided by an embodiment of the present disclosure.
  • the display panel 100A shown in FIG. 9A is a spliced display panel.
  • the display panel 100A includes a plurality of display substrates 103, and the plurality of display substrates 103 are spliced together. The edges of adjacent display substrates 103 are opposite to each other. Seams 104/105 are present.
  • a backlight assembly 10 is provided for each of the plurality of display substrates 103, and the light guide structure 5 is located on at least one side of the seam 104/105, for example, the light guide structure 5 is located on both sides of the seam 104/105, so as to improve the The display effect of the edge position of the display area 102 .
  • each display substrate 103 and its corresponding backlight assembly 10 constitute one of the above-mentioned display substrates 100 .
  • the spliced display panel 100A is spliced by four display panels 100 (sub-display panels) as an example.
  • the four sub-display panels 100 form seams 104 and 105, and the seams 104 and 105 are cross-shaped.
  • the present disclosure does not limit the number of sub-display panels 100 included in one spliced display panel 100A.
  • the seams are non-display areas, and the light guide structure 5 is located at the edges of the display area 102 on both sides of each seam.
  • the brightness of the edge of the display area corresponding to the edge area near the seam of the spliced display panel 100A is relatively high, and the phenomenon that the brightness of the edge of the display area on both sides of the seam is relatively dark is basically invisible, which improves the display effect.
  • FIG. 9B is a schematic plan view of a part including a seam of another spliced display panel provided by an embodiment of the present disclosure.
  • a spliced display panel provided by an embodiment of the present disclosure further includes a light-transmitting optical film layer P, and the optical film layer P covers the seam 105, and the spliced display panel is located on two adjacent sub-display panels. the display side of the pixel layer DL.
  • the optical film layer P covers the above-mentioned display area (AA), non-display area and seam 105 of two adjacent sub-display panels splicing the display panel.
  • the upper surface of the optical film layer P away from the pixel layer DL1/DL2 includes a first arc portion P1 and a second arc portion P2, the first arc portion P1 and the second arc portion P2 are connected, and the two are in contact with each other.
  • the orthographic projection of the joint position on the display surface is located within the orthographic projection of the seam 105 on the display surface, and the orthographic projection of the seam 105 on the display surface is located in the whole formed by the first arc portion P1 and the second arc portion P2 In the orthographic projection on the display surface, and the first arc portion P1 and the second arc portion P2 respectively protrude toward the direction away from the pixel layer DL1/DL2; In the direction from the first end of the first arc-shaped portion P2 connected to the second end of the first arc-shaped portion P1 away from the second arc-shaped portion P2, the distance from the first arc-shaped portion P1 to the corresponding pixel layer DL1 gradually increases.
  • the second arc portion P2 along the direction from the first end of the second arc portion P2 connected to the first arc portion P1 to the second end of the second arc portion P2 away from the first arc portion P1, the second arc portion P2 The distance to the pixel layer DL2 corresponding thereto gradually increases. The light from the display area is refracted by the first arc portion P1 and the second arc portion P2 so that more light is emitted from the position of the seam 105 .
  • the display layers DL1/DL2 respectively include a pixel circuit layer, a liquid crystal layer, a color filter layer and the like.
  • the material of the optical film layer P is a transparent material, such as glass, acrylic material such as polymethyl methacrylate (PMMA), polycarbonate (PC) and the like.
  • acrylic material such as polymethyl methacrylate (PMMA), polycarbonate (PC) and the like.
  • PC polycarbonate
  • the embodiment of the present disclosure does not limit the material of the optical film layer P, and may also be other light-transmitting materials.
  • FIG. 9C is a schematic diagram of the optical film layer P in FIG. 9B .
  • the thickness D2 of the optical film layer P in the direction perpendicular to the display surface is 2mm-10mm; the height D1 of the first arc portion P1 in the direction perpendicular to the display surface is 2mm-8mm, the first arc The arc length L1 of the portion P1 is 2mm-6mm, and the arc radius R1 is 2mm-10mm.
  • the above-mentioned respective dimensions of the second arcuate portion P2 are the same as those of the first arcuate portion P1.
  • the second arc portion P2 and the first arc portion P1 are substantially axisymmetric with respect to the axis of symmetry disposed on the display surface.
  • the second display panel including the optical film layer P is subjected to a simulation test. Compared with the second display panel, the luminance at the seam 105 of the first display panel and the brightness uniformity of the display area are higher.
  • the display panel using the backlight assembly provided by the embodiments of the present disclosure can also reduce the thickness of the optical film layer P to achieve a relatively uniform display brightness, which is beneficial to realize the thinning of the display panel.
  • At least one embodiment of the present disclosure provides a display device, and the display device includes any one of the display substrates provided by the embodiments of the present disclosure.
  • the display device may be a display panel.
  • FIG. 10 is a schematic diagram of a display device provided by an embodiment of the present disclosure. As shown in FIG. 10 , at least one embodiment of the present disclosure provides a display device 1000 including any display panel 100 provided by the embodiments of the present disclosure.
  • the display device 1000 is any display device that requires a backlight assembly such as a liquid crystal display device.
  • the display device 1000 is not limited to being a liquid crystal display device.
  • Other structures of the display device 1000 such as driving circuits, etc., can be designed with reference to conventional technologies in the field, and the embodiments of the present disclosure are not limited thereto.
  • the display device is a liquid crystal display device, such as including the above-mentioned display panel and backlight, and may also include display equipment with other structures, such as mobile phones, tablet computers, monitors, notebook computers, ATM machines, etc. .

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Abstract

一种背光组件(10)、显示面板(100)及显示装置(1000)，背光组件(10)包括：工作区域(1)、发光元件(3)、导光板(4)和导光结构(5)。工作区域(1)包括中间区域(1A)和围绕中间区域(1A)的边缘区域(1B)；发光元件(3)至少位于中间区域(1A)；导光板(4)位于工作区域(1)，配置为传导发光元件(3)发出的光并使光从工作区域(1)出射；导光结构(5)位于导光板(4)的靠近发光元件(3)的一侧，且沿导光板(4)的至少部分边缘设置，导光结构(5)配置为使发光元件(3)发出的光中的一部分进入边缘区域(1B)。背光组件(10)能够改善工作区域(1)的边缘区域(1B)的光的均匀化程度、以及提高工作区域(1)的边缘区域(1B)的亮度，以相应改善应用背光组件(10)的显示面板(100)的显示区域(101)的边缘的发光状态。

Description

背光组件、显示面板及显示装置 技术领域
本公开至少一实施例涉及一种背光组件、显示面板及显示装置。
背景技术
液晶显示面板通常具有背光源以提供显示所需要的光，该背光源例如直下式背光源或侧入式背光，往往由背光源进入到显示面板的显示区域的边缘处的光较少，导致显示面板的显示区域的边缘的亮度较低，显示画面较暗。目前，大尺寸的液晶显示面板可能是由多个小尺寸的子显示面板拼接而成，为每个子显示面板均提供有背光源，两个相邻的子显示面板的显示区域的边缘分别位于该两个相邻的子显示面板直接地接缝的两侧，因此，接缝的两侧显示亮度较低。
发明内容
本公开至少一实施例提供一种背光组件，该背光组件包括：工作区域、发光元件、导光板和导光结构。工作区域包括中间区域和围绕中间区域的边缘区域；发光元件至少位于中间区域；导光板位于工作区域，配置为传导发光元件发出的光并使所光从工作区域出射；导光结构位于导光板的靠近发光元件的一侧，且沿导光板的至少部分边缘设置，导光结构配置为使发光元件发出的光中的一部分进入边缘区域。本公开实施例提供的背光组件能够改善工作区域的边缘区域的光的均匀化程度、以及提高工作区域的边缘区域的亮度，以相应改善应用该背光组件的显示面板的显示区域的边缘的发光状态。例如，工作区域为出光区域。
例如，在本公开至少一实施例提供的背光组件中，所述导光板具有面向所述发光元件的底面，所述导光结构在所述导光板的底面所在的面上的正投影至少部分位于所述导光板的底面内。
例如，在本公开至少一实施例提供的背光组件中，所述导光板具有面向 所述发光元件的底面，所述导光结构与所述导光板的底面直接接触且凸出于所述导光板的底面。
例如，在本公开至少一实施例提供的背光组件中，所述导光结构是透光的；所述背光组件包括多个所述导光结构，所述多个导光结构沿所述导光板的边缘彼此间隔分布，所述多个导光结构配置为使所述发光元件发出的光在所述多个导光结构处通过所述多个导光结构、以及在相邻的所述导光结构之间的间隔处通过导光板到达边所述边缘区域。
例如，在本公开至少一实施例提供的背光组件中，所述导光结构是透光的；所述导光结构是沿所述导光板的边缘延伸的连续的条状，所述导光结构配置为使所述发光元件发出的光通过所述导光结构和所述导光板到达所述边缘区域。
例如，在本公开至少一实施例提供的背光组件中，所述导光结构是不透光的；所述背光组件包括多个所述导光结构，所述多个导光结构沿所述导光板的边缘彼此间隔分布，所述导光结构配置为使所述发光元件发出的光在相邻的所述导光结构之间的间隔处通过所述导光板到达所述边缘区域。
例如，在本公开至少一实施例提供的背光组件中，所述导光板的边缘的延伸方向为第一方向；在第一方向上，相邻的所述导光结构之间的间隔的长度大于每个所述导光结构的长度。
例如，在本公开至少一实施例提供的背光组件中，所述间隔的长度与所述导光结构的长度之比大于等于10。
例如，在本公开至少一实施例提供的背光组件中，所述间隔的长度为30mm-50mm；每个所述导光结构的长度为1mm-2mm。
例如，在本公开至少一实施例提供的背光组件中，与所述第一方向垂直且位于所述导光板的底面内的方向为第二方向，所述导光结构在所述第二方向上的宽度为3mm-5mm。
例如，在本公开至少一实施例提供的背光组件中，所述导光结构包括：导光微结构，导光微结构位于所述导光结构的面向所述导光板的面上。
例如，本公开至少一实施例提供的背光组件还包括支撑结构，支撑结构包括第一支撑部；所述第一支撑部位于所述导光板的靠近所述发光元件的一 侧，包括在垂直于所述底面的方向上面向所述导光板的第一支撑面，且配置为支撑所述导光板，所述导光板具有面向所述发光元件的底面，所述导光结构位于所述第一支撑面与所述导光板的底面之间，且与所述第一支撑面固定连接。
例如，在本公开至少一实施例提供的背光组件中，所述导光结构包括第一部分和第二部分。第一部分在所述第一支撑面所在的平面上的正投影与所述第一支撑面不重叠；第二部分与所述第一支撑面固定连接且在所述第一支撑面所在的平面上的正投影与所述第一支撑面重叠。
例如，在本公开至少一实施例提供的背光组件中，所述导光结构的第二部分与所述第一支撑面通过插接的方式连接；所述第一支撑面包括第一凹槽，所述导光结构的第二部分的朝向所述第一支撑面的表面包括第一凸起，所述第一凸起位于所述第一凹槽中，且所述第一凸起的形状与所述第一凹槽的形状互补，或者，所述第一支撑面包括第二凸起，所述导光结构的第二部分的朝向所述第一支撑面的表面包括第二凹槽，所述第二凸起位于所述第二凹槽中，且所述第二凸起的形状与所述第二凹槽的形状互补。
例如，在本公开至少一实施例提供的背光组件中，从所述发光元件到所述导光板的方向为第三方向；所述凸起的垂直于所述第三方向的截面的面积沿所述第三方向逐渐减小，或者，所述凸起的垂直于所述第三方向的截面包括弯折部分。
例如，在本公开至少一实施例提供的背光组件中，所述支撑结构是不透光的，在所述导光结构不透光的情况下，所述导光结构与所述支撑结构材料相同且一体成型。
例如，本公开至少一实施例提供的背光组件还包括边框区域，边框区域至少部分围绕所述工作区域；所述支撑结构还包括第二支撑部，第二支撑部与所述第一支撑部连接且位于所述边框区域；所述第二支撑部的朝向所述导光板的侧面与所述第一支撑面相交，且与所述导光板的边缘以及所述导光结构中至少之一接触或彼此间隔。
例如，本公开至少一实施例提供的背光组件还包括底板，所述发光元件位于所述底板上，所述第一支撑部与所述底板连接。
本公开至少一实施例提供一种显示面板，包括显示基板和本公开实施例提供的任意一种背光组件，所述显示基板位于所述导光板的远离所述发光元件的一侧。
例如，在本公开至少一实施例提供的显示面板中，所述显示面板包括显示面，所述显示面包括显示区域和至少部分围绕所述显示区域的非显示区域，所述显示区域位于所述背光组件的工作区域在所述显示面上的正投影内；所述背光组件配置为：使所述发光元件发出的光进入所述显示区域，且所述进入所述背光组件的边缘区域的光进入所述显示区域的边缘区域；所述导光结构在所述显示面上的正投影至少部分位于所述显示区域的边缘区域。
例如，在本公开至少一实施例提供的显示面板中，在所述显示面板包括支撑结构且所述支撑结构包括第一支撑部和第二支撑部时，所述第一支撑部配置为支撑所述导光板，所述第二支撑部配置为支撑所述显示基板，且所述第二支撑部在所述显示基板的显示面上的正投影位于所述非显示区域。
例如，本公开至少一实施例提供的显示面板中包括多个所述显示基板，所述多个显示基板相互拼接，相邻的显示基板的边缘彼此相对，相邻的显示基板之间存在接缝；为所述多个显示基板的每个提供所述背光组件，所述导光结构位于所述接缝的至少一侧。
本公开至少一实施例提供一种显示装置，该显示装置包括本公开实施例提供的任意一种显示面板。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。
图1为本公开一实施例提供的一种背光组件的平面示意图；
图2A为沿图1中的A-A’线的截面示意图；
图2B为沿图1中的B-B’线的截面示意图；
图2C为图1所示的背光组件的包括导光结构的局部的示意图；
图3A为本公开一实施例提供的一种背光组件对光线进行调节的示意图 一；
图3B为本公开一实施例提供的一种背光组件对光线进行调节的示意图二；
图3C为一种拼接显示面板的接缝附近对应于边缘区域的显示区域的边缘的亮度较暗的图示；
图3D为采用本公开实施例提供的背光组件的一种拼接显示面板的接缝附近对应于边缘区域的显示区域的边缘的亮度改善效果图；
图4A为沿图2A中的局部L的一种放大示意图；
图4B为沿图2A中的局部L的另一种放大示意图；
图4C为沿图2A中的局部L的又一种放大示意图；
图5A为本公开一实施例提供的另一种背光组件的平面示意图；
图5B为本公开一实施例提供的又一种背光组件的平面示意图；
图6为本公开一实施例例提供的一种背光组件的另一种导光结构的示意图；
图7为本公开一实施例提供的一种显示面板的平面示意图；
图8为沿图7中的C-C’线的截面示意图；
图9A为本公开一实施例提供的另一种显示面板的平面示意图；
图9B为本公开一实施例提供的又一种拼接显示面板的包括接缝的局部的平面示意图；
图9C为图9B中的光学膜层P的示意图；
图10为本公开一实施例提供的一种显示装置的示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。以下所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其它实施例，都属于本公开保护的范围。
除非另作定义，此处使用的技术术语或者科学术语应当为本发明所属领 域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“包括”或者“包含”等类似的词语意指出现在该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
本公开所使用的附图的尺寸并不是严格按实际比例绘制，显示区域中导光结构的个数也不是限定为图中所示的数量，各个结构的具体地尺寸和数量可根据实际需要进行确定。本公开中所描述的附图仅是结构示意图。
本公开至少一实施例提供一种背光组件，该背光组件包括：工作区域、发光元件、导光板和导光结构。工作区域包括中间区域和围绕中间区域的边缘区域；发光元件至少位于中间区域；导光板位于工作区域，配置为传导发光元件发出的光并使所光从工作区域出射；导光结构位于导光板的靠近发光元件的一侧，且沿导光板的至少部分边缘设置，导光结构配置为使发光元件发出的光中的一部分进入边缘区域。本公开实施例提供的背光组件能够改善工作区域的边缘区域的光的均匀化程度、以及提高工作区域的边缘区域的亮度，以相应改善应用该背光组件的显示面板的显示区域的边缘的发光状态。例如，工作区域为出光区域。
示例性地，图1为本公开一实施例提供的一种背光组件的平面示意图，图2A为沿图1中的A-A’线的截面示意图，图2B为沿图1中的B-B’线的截面示意图，图2C为图1所示的背光组件的包括导光结构的局部的示意图。结合图1、图2A-2C，该背光组件10包括：工作区域1、发光元件3、导光板4和导光结构5。工作区域1包括中间区域1A和围绕中间区域1A的边缘区域1B。例如，工作区域1为出光区域；边缘区域1B为工作区域1的靠近工作区域1的边缘的部分，边缘附近的区域。发光元件3至少位于中间区域1A；例如发光元件3位于工作区域1的中央，例如位于工作区域1几何中心。例如背光组件10包括多个发光元件3，多个发光元件3位于中间区域1A， 例如多个发光元件3呈阵列分布。例如发光元件3为有机发光二极管或无机发光二极管，当然，本公开对于发光元件3的种类和具体位置不作限定。导光板4位于工作区域1，且配置为传导发光元件3发出的光并使所光从工作区域1出射。例如，导光板4位于整个工作区域1且整个工作区域1设置有导光板4，即导光板4所在的区域与工作区域1是彼此相等的两个区域，也即导光板4在平行于其出光面的平面上的正投影与工作区域1在平行于出光面上的正投影重合。例如导光板4配置为对来自发光元件3的光进行均匀化或进行扩散；导光板不仅仅可以是一个一体化的板状结构，例如导光板还可以包括扩散膜层或者为扩散膜层，例如扩散膜层包括散射粒子，以对来自发光元件3的光进行均匀化或进行扩散。导光结构5位于导光板4的靠近发光元件3的一侧，且沿导光板4的至少部分边缘设置，导光结构5配置为使发光元件3发出的光中的一部分进入边缘区域1B。通常的背光组件的工作区域的边缘区域的亮度较低，从而当该背光组件被应用于显示面板时，对应于边缘区域的显示区域的显示亮度较低，造成显示亮度不均匀，影响显示效果。本公开实施例提供的背光组件10的导光结构5可以在图2A所示的高度方向D3上将导光板4垫高，以使更多的光到达边缘区域1B，改善边缘区域1B亮度低的问题，从而改善工作区域1的边缘区域1B的光的均匀化程度、以及提高工作区域1的边缘区域1B的亮度，以相应改善应用本公开实施例提供的背光组件10的显示面板的显示区域的边缘的发光状态，达到亮度均匀的显示效果。
图3A为本公开一实施例提供的一种背光组件对光线进行调节的示意图一，图3B为本公开一实施例提供的一种背光组件对光线进行调节的示意图二。参考图3A-3B，由于在导光结构5可以在高度方向D3上将导光板4垫高，则更多的光尤其是入射至导光结构5和导光板4的入射角较大的光LB2/LB3可以穿过导光结构5附近的空间11/12而穿过导光板4以从边缘区域1B出射，从而实现提高边缘区域1B的亮度的效果。可对比图3B中所示的在不存在导光结构5的情况下，虚线矩形框所代表的假设导光板40在高度方向D3上的高度较低，则相同的入射角较大的光LB2/LB3穿过假设导光板40后会在边缘区域1B的靠近中间区域1A的位置出射，例如在中间区域1A 出射，因此，与本公开实施例提供的背光组件10相比，这种情况下，较少的光会从边缘区域1B出射。从而，本公开实施例提供的背光组件10能够使较多的光从边缘区域1B出射，从而改善上述边缘区域1B亮度低的问题。同时，光LB1在多个导光结构5之间的间隔位置进入导光板4，在导光板4中经过多次反射后进入边缘区域1B，以改善上述边缘区域1B亮度低的问题。
图3C为一种拼接显示面板的接缝附近对应于边缘区域的显示区域的边缘的亮度较暗的图示；图3D为采用本公开实施例提供的背光组件的一种拼接显示面板的接缝附近对应于边缘区域的显示区域的边缘的亮度改善效果图。该拼接显示面板由多个子显示面板拼接而成，图中黑色的线条为相邻的两个子显示面板的接缝，黑色线条位置为非显示区，紧邻该接缝处的位置为背光组件10的边缘区域1B所对应的显示区域的边缘，对比图3C和图3D中的显示区域的边缘的亮度可知，图3D所示的采用本公开实施例提供的背光组件的一种拼接显示面板的接缝附近对应于边缘区域的显示区域的边缘的亮度较高，基本看不到该接缝两侧的显示区域的边缘亮度较暗的现象，提高了显示效果。
例如，图1所示的背光组件10整体的平面形状和导光板4的平面形状均为矩形，多个导光结构5沿矩形的四条边的每条边设置，以改善每条附近的边缘区域1B亮度低的问题。不限于导光结构5沿导光板4的每条边设置。例如，图5A为本公开一实施例提供的另一种背光组件的平面示意图，在图5A所示的实施例中，导光结构5沿导光板的部分边设置，例如沿相对的两条边设置。本领域技术人员可根据需要改善亮度的位置进行设置。
当然，背光组件10整体的平面形状和导光板4的平面形不限于矩形，也可以为其他多边形或者为圆形、不规则图形等，在各种情况下，导光结构5均是沿导光板4的边缘分布。
例如，如图2A所示，导光板4具有面向发光元件3的底面41，导光结构5在导光板4的底面41所在的面上的正投影的一部分位于导光板4的底面41内，即导光结构5在平行于底面41的方向上突出于导光板4的边缘。
图4B为沿图2A中的局部L的一种放大示意。例如，在其他一些实施例中，如图4B所示，整个导光结构5在导光板4的底面41所在的面上的正 投影位于导光板4的底面41内。从而导光结构5在平行于底面41的方向上不会突出于导光板4的边缘，使得背光组件10具有较窄的边框，从而使得采用该背光组件10的显示面板具有较窄的边框。
例如，如图2A所示，导光结构5与导光板4的底面41直接接触且凸出于导光板4的底面41。例如，导光结构5凸出于底面41的高度为1mm-2mm，经试验验证，该高度范围可获得较理想的调光效果；如果该高度过小则会起不到理想的在第三方向D3上垫高导光板4调光的作用，从而无法获得较理想的调光效果，如果该高度过大，则对光的调制过大且会不必要地增大背光组件在第三方向D3上的厚度，不利于采用该背光组件制作轻薄型设备例如轻薄显示面板。当然，本公开实施例对该高度范围不作限定。
在一些实施例中，如图1、图2A-2C所示，例如，导光结构5是透光的。这种情况下，例如，背光组件10包括多个导光结构5，多个导光结构5沿导光板4的边缘彼此间隔分布，多个导光结构5配置为使发光元件3发出的光在多个导光结构5处通过多个导光结构5或者依次通过所述导光结构和导光板、以及在相邻的导光结构5之间的间隔处通过导光板4到达边缘区域1B。需要说明的是，在导光结构5处，光通过导光结构5之后是否需要通过导光板4到达边缘区域1B，取决于该位置处导光结构5是否与导光板4重叠。多个导光结构5沿导光板4的边缘彼此间隔分布，有利于在提高边缘区域1B的出光亮度的同时，提高透光率。
例如，在背光组件10包括多个导光结构5，且多个导光结构5沿导光板4的边缘彼此间隔分布的情况下，多个导光结构5的分布密度相同，即相邻的导光结构5之间的间距相等，均匀分布，以适用于均匀调节边缘区域1B的出光亮度的需求；或者，多个导光结构5的分布密度不相同，以适用于边缘区域1B亮度不均的情况；例如，边缘区域1B亮度较低的位置，导光结构5的分布密度较大，边缘区域1B亮度较高的位置，导光结构5的分布密度较小。
图5B为本公开一实施例提供的又一种背光组件的平面示意图。如图5B所示，例如，导光结构5是透光的；导光结构5是沿导光板4的边缘延伸的连续的条状，导光结构5配置为使发光元件3发出的光通过导光结构5和导 光板4到达边缘区域1B。导光结构5是沿导光板4的边缘延伸的连续的条状利于获得更好地提高边缘区域1B的出光亮度的效果。
在导光结构5是透光的情况下，导光结构5对边缘区域1B亮度的改善除了通过上述通过将导光板4垫高之外，还通过折射作用。具体地，参考图3B，导光结构5具有面向发光元件3的底面，自发光元件3的光LB5入射导光结构5的底面的入射角较大，如果不存在导光结构5，入射角较大的光LB5将不能达到边缘区域1B。然而在本公开提供的背光组件10中，光LB5在导光结构5的底面发生第一次折射，第一折射角θ1小于入射角，从而使得光LB5朝向靠近中间区域1A的方向偏离而进入边缘区域1B。在导光结构5与导光板4重叠的位置，即两者在导光板4的底面41所在的平面上的正投影重叠的位置，光LB5穿过导光结构5而入射至导光板4，从而从背光组件10出射；光LB5在导光结构5与导光板4的界面上发生第二次折射，例如导光板4的折射率为N1，导光结构5的折射率为N2，例如，N1<N2，以使得第二折射角θ2小于第一折射角θ1，即光LB5经过第二次折射后进一步向朝向靠近中间区域1A的方向偏离而进入边缘区域1B，从而可使得具有更大入射角的光LB5进入边缘区域1B，增加进入边缘区域1B的光量，提高边缘区域1B的亮度的效果较好，同时提高了光的利用率。
例如，透光的导光结构5的材料可以包括聚甲基丙烯酸甲酯(PMMA)、聚碳酸酯(PC)等透明材料中的至少之一。当然，本公开实施例对不透光的导光结构5的材料不作限定。
例如，在一些实施例中，如图1和图2A-2C所示，导光结构5也可以是不透光的；背光组件10包括多个导光结构5，多个导光结构5沿导光板4的边缘彼此间隔分布，导光结构5配置为使发光元件3发出的光在相邻的导光结构5之间的间隔处通过导光板4到达边缘区域1B。这种情况下，如图3A所示，导光结构5通过在高度方向D3上将导光板4垫高，使更多的入射至导光板4的入射角较大的光LB2/LB3穿过导光结构5附近的空间11/12而穿过导光板4以从边缘区域1B出射，从而实现提高边缘区域1B的亮度的效果。
例如，不透光的导光结构5的材料可以包括铝挤或塑胶等不透明材料中的至少之一。当然，本公开实施例对不透光的导光结构5的材料不作限定。
例如，如图1所示，导光板4的边缘的延伸方向为第一方向D1；需要说明的是，针对导光板4的每一条边，均存在一个第一方向D1，沿不同方向延伸的不同边限定出的第一方向D1不同，例如在图1中，矩形的导光板4的四条边限定出的第一方向D1不同。例如在第一方向D1上，相邻的导光结构5之间的间隔的长度g大于每个导光结构5的长度l，试验证明，相比于其他设计，如此不仅可达到较好的调节边缘区域1B的亮度的效果，并且，由于每个导光结构5的长度l较小，而相邻的导光结构5之间的间隔的长度g较大，到达相邻的导光结构5之间的间隔的位置的光中的一部分补充到导光结构5的位置，使整个边缘区域1B的亮度均与，不会因局部设置导光结构5而造成导光结构5所在的位置较暗的现象。
例如，在第一方向D1上，相邻的导光结构5之间的间隔的长度g与导光结构5的长度l之比大于等于10。试验证明，相比于其他尺寸关系，如此可达到较好的调节边缘区域1B的亮度的效果。
例如，相邻的导光结构5之间的间隔的长度g为30mm-50mm。试验证明，长度g的该取值范围是在实现较理想的提高边缘区域1B的亮度的同时导光结构5的制作难度不会太大，是最理想的范围。如果该长度g过大，则达不到理想的提高边缘区域1B的亮度的效果；如果该长度g过小，则存在过度调节边缘区域1B的亮度，且加大导光结构5的制作难度。
例如，每个导光结构5的长度l为1mm-2mm。例如，与第一方向D1垂直且位于导光板4的底面内的方向为第二方向D2，导光结构5在第二方向D2上的宽度w1为3mm-5mm。试验证明，导光结构5的长度l和宽度w1的该取值范围是在实现较理想的提高边缘区域1B的亮度的同时导光结构的制作难度不会太大，是最理想的范围。如果该长度l和宽度w1过大，则存在过度调节边缘区域1B的亮度，且影响透光率，达不到理想的提高边缘区域1B的亮度的效果；如果该长度g和宽度w1过小，则难以取得理想的提高边缘区域1B的亮度的效果，且加大导光结构5的制作难度。
图6为本公开一实施例提供的一种背光组件的另一种导光结构的示意图。如图6所示，例如，导光结构5包括导光微结构52，导光微结构52位于导光结构5的面向导光板4的面上，以利用导光微结构52对入射至导光结 构5中的光进行扩散，获得更好的扩散效果，从而使更多的光进入边缘区域1B，实现更好的提高边缘区域1B的亮度的效果。例如，导光结构5包括基底51以及位于基底上的导光微结构52，导光微结构52位于基底51的面向导光板4的一侧。例如，导光微结构52包括呈周期性地分布于基底51上的多个第一微结构单元520(图6中截面为一个三角形)。例如，导光结构5还包括填充于多个第一微结构单元520之间的第二微结构单元530，以使多个第一微结构单元520的表面平坦，从而使得导光微结构52能够更稳固地与导光板4结合；例如第二微结构单元530的形状与第一微结构单元520的形状互补。例如，导光微结构52为二维光栅或三维光栅。关于导光微结构52的具体设计，本领域技术人员可参考本领域常规技术。
例如，如图2A所示，背光组件10还包括支撑结构6。支撑结构6包括第一支撑部61，第一支撑部61位于导光板4的靠近发光元件3的一侧，包括在垂直于底面的方向上面向导光板4的第一支撑面4A，且配置为支撑导光板4。如此，导光结构5与第一支撑部61共同起到支撑导光板4的作用。
例如，第一支撑面4A为条形，该条形沿与第一方向D1和三方向D3垂直的方向延伸。例如第一支撑面4A也可包括彼此间隔分布的多个部分，每个部分对应一个导光结构，即第一支撑面4A的彼此间隔分布的多个部分也沿第一方向D1排列，类似于彼此间隔分布的多个导光结构5的排布方式，以与彼此间隔分布的多个导光结构5一一对应连接。
例如，导光结构5位于第一支撑面4A与导光板4的底面41之间，且与第一支撑面4A固定连接，从而导光结构5与第一支撑部61共同稳固支撑导光板4。
例如，如图2A和图4A所示，导光结构5包括第一部分和第二部分。第一部分在第一支撑面4A所在的平面上的正投影与第一支撑面4A不重叠，第一部分在宽度方向上朝延伸超出第一支撑面；第二部分与第一支撑面4A固定连接且在第一支撑面4A所在的平面上的正投影与第一支撑面4A重叠。当导光结构5透光而第一支撑部61不透光时，例如导光结构5是透明的，来自发光元件3的光可通过导光结构5的第一部分进入显示区域的边缘区域。
图4A为沿图2A中的局部L的一种放大示意图；图4B为沿图2A中的 局部L的另一种放大示意图；图4C为沿图2A中的局部L的又一种放大示意图。如图4A所示，例如，导光结构5的第二部分与第一支撑面4A通过插接的方式连接；第一支撑面4A包括第一凹槽71，导光结构5的第二部分的朝向第一支撑面4A的表面包括第一凸起72，第一凸起72位于第一凹槽71中，且第一凸起72的形状与第一凹槽71的形状互补。如此组装导光结构5与第一支撑部61，无需锁附及粘贴作业，结构连接牢固，组装简便，成本较低。
例如，如图4A所示，从发光元件3到导光板4的方向为第三方向D3，第一凸起72的垂直于第三方向的截面的面积沿第三方向D3逐渐减小，以使得第一凸起72与第一凹槽71的连接更加稳固，第一凸起72不易于从第一凹槽71中脱离。
例如，在如图4B所示的实施例中，第一凸起72具有弯折部分，例如第一凸起72的垂直于第三方向D3的截面包括弯折部分，以使得第一凸起72与第一凹槽71的连接更加稳固，第一凸起72不易于从第一凹槽71中脱离。
又例如，如图4C所示，第一支撑面4A包括第二凸起82，导光结构5的第二部分的朝向第一支撑面4A的表面包括第二凹槽81，第二凸起82位于第二凹槽81中，且第二凸起82的形状与第二凹槽81的形状互补。
例如，如图2A所示，背光组件10还包括边框区域2，至少部分围绕工作区域1，边框区域2是不发光的，即无光线从边框区域2出射。如果第一支撑面4A过窄，即第一支撑面4A在第二方向D2上的宽度w2过小，会造成导光板4在低温存储测试过程中或由于组装误差而造成导光板4从第一支撑部61上脱落的问题。例如，如图4A所示，由于导光结构5透明且凸出第一支撑面4A在第二方向D2上的宽度w2小于与其连接的导光结构5在第二方向D2上的宽度w1，例如w1–w2＝1mm-2mm，如此，既可保证导光结构5与导光板4的粘贴宽度，防止导光板4从第一支撑部61上脱落，又降低边框区域2的宽度，同时还可保证边缘区域1B光线的射入量，提升周边画面亮度。
例如，支撑结构6是不透光的，在导光结构5不透光的情况下，导光结构5与支撑结构6材料相同且一体成型。
例如，支撑结构6的材料为金属材料例如铝、铜、铝合金、铜合金、钢等，或为有机材料例如塑胶。
例如，在图1和图5A所示的实施例中，每个导光结构5通过至少一个第一凹槽71与第一支撑面4A连接，因此，对应于导光板4的每条设置有彼此间隔的多个导光结构5的边缘，均存在多个第一凹槽71沿导光板4的该边缘排列。
例如，在图1和图5B所示的实施例中，每个长条形的导光结构5通过多个第一凹槽71与第一支撑面4A连接，因此，对应于导光板4的每条设置有导光结构5的边缘，均存在多个第一凹槽71沿导光板4的该边缘排列。
例如，如图2A所示，支撑结构6还包括第二支撑部62，与第一支撑部61连接且位于边框区域2，第二支撑部62的朝向导光板4的侧面与第一支撑面4A相交，且与导光板4的边缘以及导光结构5中至少之一接触或彼此间隔。例如，第二支撑部62的朝向导光板4的侧面与第一支撑面4A垂直；例如第二支撑部62与第一支撑部61构成台阶状结构。
例如，在第一支撑面4A制作出第一凹槽71，可通过挤出成型工艺形成第一凹槽71；然后，采用胶铁一体注塑成型工艺在第一支撑面4A上形成与第一支撑面4A连接的导光结构5。
又例如，在第一支撑面4A制作出第一凹槽71，可通过挤出成型工艺形成第一凹槽71；然后，通过点胶固化工艺将导光结构5形成于第一支撑面4A上。
再例如，采用注塑成型形成导光结构5，第一支撑面4A、导光结构5的面向第一支撑面4A的底面均为平面，采用双面胶贴附将导光结构5的底面贴附于第一支撑面4A上。
在支撑结构6不透光、且导光结构5为透光的情况下，例如采用双色注塑工艺形成导光结构5与支撑结构6，把导光结构5和支撑结构6分别设置为透明结构和非透明结构。
在支撑结构6与导光结构5均为不透光材料的情况下，支撑结构6与导光结构5可采用同一材料通过一体成型工艺制作。
例如，如图2A所示，背光组件10包括底板，其中，发光元件3位于底 板上，第一支撑部61与底板9连接，以实现支撑结构6的固定，从而实现支撑结构6和导光结构5对导光板4的支撑作用。
图7为本公开一实施例提供的一种显示面板的平面示意图，图8为沿图7中的C-C’线的截面示意图。例如，如图7-8所示，本公开至少一实施例还提供一种显示面板100，该显示面板100包括显示基板103和本公开实施例提供的任意一种背光组件10，显示基板103位于导光板4的远离发光元件3的一侧。例如，显示基板103为LCD显示基板等需要背光源的显示基板。
显示面板100包括显示面(远离背光组件的面)，显示面包括显示区域101和至少部分围绕显示区域的非显示区域102，显示区域101位于背光组件10的工作区域1在显示面上的正投影内；背光组件10配置为：使发光元件3发出的光进入显示区域，且进入背光组件10的边缘区域1B的光进入显示区域的边缘区域1B。导光结构5在显示面上的正投影至少部分位于显示区域101的边缘区域。本公开实施例提供的显示面板100能够改善显示区域102的边缘区域的光的均匀化程度、以及提高显示区域102的边缘区域的亮度，解决显示区域102的边缘区域较暗的问题，提升显示质量。
例如，导光结构5在显示面上的的投影在显示面上的正投影全部位于显示区域101内，以使显示面板100具有较窄的边框。
例如，第一支撑部61配置为支撑导光板4，第二支撑部62配置为支撑显示基板103，且第二支撑部62在显示基板103的显示面上的正投影位于非显示区域102，以窄化显示面板100的边框。
图9A为本公开一实施例提供的另一种显示面板的平面示意图。图9A所示的显示面板100A为拼接显示面板，显示面板100A包括多个显示基板103，多个显示基板103相互拼接，相邻的显示基板103的边缘彼此相对，相邻的显示基板103之间存在接缝104/105。为多个显示基板103的每个提供背光组件10，导光结构5位于接缝104/105的至少一侧，例如导光结构5位于接缝104/105的两侧，以改善接缝两侧的显示区域102的边缘位置的显示效果。如图9A中虚线框所示，每个显示基板103与其对应的背光组件10构成一个上述显示基板100。例如，图9A以拼接显示面板100A由四个显示面板100(子显示面板)拼接而成为例，四个子显示面板100形成接缝104和接缝105， 接缝104和接缝105呈十字相交形。但是本公开对一个拼接显示面板100A所包括的子显示面板100的个数不作限定。
需要说明的是，接缝为非显示区，导光结构5位于每个接缝的两侧的显示区域102的边缘位置。
该拼接显示面板100A的接缝附近对应于边缘区域的显示区域的边缘的亮度较高，基本看不到该接缝两侧的显示区域的边缘亮度较暗的现象，提高了显示效果。
图9B为本公开一实施例提供的又一种拼接显示面板的包括接缝的局部的平面示意图。如图9B所示，例如，本公开实施例提供的一种拼接显示面板还包括透光的光学膜层P，光学膜层P覆盖接缝105，且位于相邻的两个子显示面板拼接显示面板的像素层DL的显示侧。例如光学膜层P覆盖相邻的两个子显示面板拼接显示面板的上述显示区域(AA)、非显示区和接缝105。例如，光学膜层P的远离像素层DL1/DL2的上表面包括第一弧形部P1和第二弧形部P2，第一弧形部P1和第二弧形部P2相接，两者相接的位置在显示面上的正投影位于接缝105在显示面上的正投影内，接缝105在显示面上的正投影位于第一弧形部P1和第二弧形部P2构成的整体在显示面上的正投影内，并且，第一弧形部P1和第二弧形部P2分别朝向远离像素层DL1/DL2的方向凸起；沿从第一弧形部P1的与第二弧形部P2相接的第一端到所述第一弧形部P1的远离第二弧形部P2的第二端的方向，第一弧形部P1到与其对应的像素层DL1的距离逐渐增大；沿从第二弧形部P2的与第一弧形部P1相接的第一端到第二弧形部P2的远离第一弧形部P1的第二端的方向，第二弧形部P2到与其对应的像素层DL2的距离逐渐增大。以使得来自显示区域的光经第一弧形部P1和第二弧形部P2折射之后更多的从接缝105的位置出射。
例如，显示层DL1/DL2分别包括像素电路层、液晶层、彩膜层等等。
例如，光学膜层P的材料为透明材料，例如为玻璃、亚克力材料例如聚甲基丙烯酸甲酯(PMMA)、聚碳酸酯(PC)等。当然本公开实施例对光学膜层P的材料不作限定，也可以是其他的透光材料。
图9C为图9B中的光学膜层P的示意图。如图9C所示，光学膜层P在 垂直于显示面方向上的厚度D2为2mm-10mm；第一弧形部P1在垂直于显示面方向上的高度D1为2mm-8mm，第一弧形部P1的弧长L1为2mm-6mm，弧半径R1为2mm-10mm。第二弧形部P2的上述各个尺寸与第一弧形部P1的相同。例如第二弧形部P2和第一弧形部P1相对于处置于显示面的对称轴基本呈轴对称。
采用包括光学膜层P(D2设置为3mm，D1＝2mm，L1＝3mm，R1＝3mm)的包括本公开实施例提供的背光组件的显示面板一，和与显示面板一的其他条件相同但不包括光学膜层P的显示面板二进行仿真测试，相比于显示面板二，显示面板一的接缝105处的亮度与显示区域的亮度均一性较高。
并且，采用包括光学膜层P(D2分别设置为5mm，D1＝2mm，L1＝3mm，R1＝3mm)的不包括本公开实施例提供的背光组件的显示面板三与显示面板一进行仿真测试，相比于显示面板三，显示面板一的接缝105处的亮度与显示区域的亮度均一性较高。因此，采用本公开实施例提供的背光组件的显示面板，还可降低光学膜层P的厚度即可达到较均匀的显示亮度，利于实现显示面板的减薄。
本公开至少一实施例提供一种显示装置，该显示装置包括本公开实施例提供的任意一种显示基板。例如，该显示装置可以为显示面板。
示例性地，图10为本公开一实施例提供的一种显示装置的示意图。如图10所示，本公开至少一实施例提供显示装置1000包括本公开实施例提供的任意一种显示面板100。
例如，显示装置1000为任何需要背光组件的显示装置例如液晶显示装置。当然，显示装置1000不限于是液晶显示装置。显示装置1000的其他结构例如驱动电路等等，本领域可参考常规技术进行设计，本公开的实施例对此没有限制。
例如，该显示装置是液晶显示装置，例如包括上述显示面板和背光源，也可以是还包括其他结构的显示设备等等，例如可实现为手机、平板电脑、显示器、笔记本电脑、ATM机等产品。
以上所述仅是本公开的示范性实施方式，而非用于限制本公开的保护范围，本公开的保护范围根据权利要求书所界定的范围确定。

Claims (23)

  1. 一种背光组件，包括：
    工作区域，包括中间区域和围绕所述中间区域的边缘区域；
    发光元件，至少位于所述中间区域；
    导光板，位于所述工作区域，配置为传导所述发光元件发出的光并使所光从所述工作区域出射；以及
    导光结构，位于所述导光板的靠近所述发光元件的一侧，且沿所述导光板的至少部分边缘设置，其中，所述导光结构配置为使所述发光元件发出的光中的一部分进入所述边缘区域。
  2. 根据权利要求1所述的背光组件，其中，所述导光板具有面向所述发光元件的底面，所述导光结构在所述导光板的底面所在的面上的正投影至少部分位于所述导光板的底面内。
  3. 根据权利要求1所述的背光组件，其中，所述导光板具有面向所述发光元件的底面，所述导光结构与所述导光板的底面直接接触且凸出于所述导光板的底面。
  4. 根据权利要求1-3任一所述的背光组件，其中，所述导光结构是透光的；
    所述背光组件包括多个所述导光结构，所述多个导光结构沿所述导光板的边缘彼此间隔分布，所述多个导光结构配置为使所述发光元件发出的光在所述多个导光结构处通过所述多个导光结构、以及在相邻的所述导光结构之间的间隔处通过导光板到达边所述边缘区域。
  5. 根据权利要求1-3任一所述的背光组件，其中，所述导光结构是透光的；
    所述导光结构是沿所述导光板的边缘延伸的连续的条状，所述导光结构配置为使所述发光元件发出的光通过所述导光结构和所述导光板到达所述边缘区域。
  6. 根据权利要求1-3任一所述的背光组件，其中，所述导光结构是不透光的；
    所述背光组件包括多个所述导光结构，所述多个导光结构沿所述导光板的边缘彼此间隔分布，所述导光结构配置为使所述发光元件发出的光在相邻的所述导光结构之间的间隔处通过所述导光板到达所述边缘区域。
  7. 根据权利要求4或6所述的背光组件，其中，所述导光板的边缘的延伸方向为第一方向；在第一方向上，相邻的所述导光结构之间的间隔的长度大于每个所述导光结构的长度。
  8. 根据权利要求7所述的背光组件，其中，所述间隔的长度与所述导光结构的长度之比大于等于10。
  9. 根据权利要求8所述的背光组件，其中，所述间隔的长度为30mm-50mm；
    每个所述导光结构的长度为1mm-2mm。
  10. 根据权利要求1-9任一所述的背光组件，其中，与所述第一方向垂直且位于所述导光板的底面内的方向为第二方向，所述导光结构在所述第二方向上的宽度为3mm-5mm。
  11. 根据权利要求1-10任一所述的背光组件，其中，所述导光结构包括：
    导光微结构，位于所述导光结构的面向所述导光板的面上。
  12. 根据权利要求1-11任一所述的背光组件，还包括：
    支撑结构，包括第一支撑部，其中，所述第一支撑部位于所述导光板的靠近所述发光元件的一侧，包括在垂直于所述底面的方向上面向所述导光板的第一支撑面，且配置为支撑所述导光板，
    所述导光板具有面向所述发光元件的底面，所述导光结构位于所述第一支撑面与所述导光板的底面之间，且与所述第一支撑面固定连接。
  13. 根据权利要求12所述的背光组件，其中，所述导光结构包括：
    第一部分，在所述第一支撑面所在的平面上的正投影与所述第一支撑面不重叠；以及
    第二部分，与所述第一支撑面固定连接且在所述第一支撑面所在的平面上的正投影与所述第一支撑面重叠。
  14. 根据权利要求13所述的背光组件，其中，所述导光结构的第二部分与所述第一支撑面通过插接的方式连接；
    所述第一支撑面包括第一凹槽，所述导光结构的第二部分的朝向所述第一支撑面的表面包括第一凸起，所述第一凸起位于所述第一凹槽中，且所述第一凸起的形状与所述第一凹槽的形状互补，或者，
    所述第一支撑面包括第二凸起，所述导光结构的第二部分的朝向所述第一支撑面的表面包括第二凹槽，所述第二凸起位于所述第二凹槽中，且所述第二凸起的形状与所述第二凹槽的形状互补。
  15. 根据权利要求14所述的背光组件，其中，从所述发光元件到所述导光板的方向为第三方向；
    所述凸起的垂直于所述第三方向的截面的面积沿所述第三方向逐渐减小，或者，所述凸起的垂直于所述第三方向的截面包括弯折部分。
  16. 根据权利要求15所述的背光组件，其中，所述支撑结构是不透光的，在所述导光结构不透光的情况下，所述导光结构与所述支撑结构材料相同且一体成型。
  17. 根据权利要求12-16任一所述的背光组件，还包括：
    边框区域，至少部分围绕所述工作区域，其中，
    所述支撑结构还包括：
    第二支撑部，与所述第一支撑部连接且位于所述边框区域，其中，
    所述第二支撑部的朝向所述导光板的侧面与所述第一支撑面相交，且与所述导光板的边缘以及所述导光结构中至少之一接触或彼此间隔。
  18. 根据权利要求12-17任一所述的背光组件，包括底板，其中，所述发光元件位于所述底板上，所述第一支撑部与所述底板连接。
  19. 一种显示面板，包括显示基板和权利要求1-18任一所述的背光组件，其中，所述显示基板位于所述导光板的远离所述发光元件的一侧。
  20. 根据权利要求19所述的显示面板，其中，所述显示面板包括显示面，所述显示面包括显示区域和至少部分围绕所述显示区域的非显示区域，所述显示区域位于所述背光组件的工作区域在所述显示面上的正投影内；
    所述背光组件配置为：使所述发光元件发出的光进入所述显示区域，且所述进入所述背光组件的边缘区域的光进入所述显示区域的边缘区域；
    所述导光结构在所述显示面上的正投影至少部分位于所述显示区域的边 缘区域。
  21. 根据权利要求20所述的显示面板，其中，在所述显示面板包括支撑结构且所述支撑结构包括第一支撑部和第二支撑部时，所述第一支撑部配置为支撑所述导光板，
    所述第二支撑部配置为支撑所述显示基板，且所述第二支撑部在所述显示基板的显示面上的正投影位于所述非显示区域。
  22. 根据权利要求19-21任一所述的显示面板，包括：
    多个所述显示基板，其中，所述多个显示基板相互拼接，相邻的显示基板的边缘彼此相对，相邻的显示基板之间存在接缝；
    为所述多个显示基板的每个提供所述背光组件，所述导光结构位于所述接缝的至少一侧。
  23. 一种显示装置，包括权利要求19-22任一所述的显示面板。
PCT/CN2021/103071 2021-06-29 2021-06-29 背光组件、显示面板及显示装置 WO2023272482A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060007369A1 (en) * 2004-06-30 2006-01-12 L.G. Philips Lcd Co., Ltd. Tiled display device
CN103971600A (zh) * 2013-02-05 2014-08-06 业鑫科技顾问股份有限公司 显示元件、显示装置及拼接式显示器
CN110161751A (zh) * 2019-05-23 2019-08-23 京东方科技集团股份有限公司 背光模组及显示装置
CN210865431U (zh) * 2020-02-26 2020-06-26 北京京东方显示技术有限公司 一种背光模组、拼接屏及显示装置
CN213092065U (zh) * 2020-09-27 2021-04-30 杭州海康威视数字技术股份有限公司 一种液晶显示模组及液晶显示设备
CN213149433U (zh) * 2020-11-10 2021-05-07 北京京东方显示技术有限公司 一种胶框、背光模组及显示装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209690674U (zh) * 2019-04-01 2019-11-26 苏州璨宇光学有限公司 直下式背光模块及显示装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060007369A1 (en) * 2004-06-30 2006-01-12 L.G. Philips Lcd Co., Ltd. Tiled display device
CN103971600A (zh) * 2013-02-05 2014-08-06 业鑫科技顾问股份有限公司 显示元件、显示装置及拼接式显示器
CN110161751A (zh) * 2019-05-23 2019-08-23 京东方科技集团股份有限公司 背光模组及显示装置
CN210865431U (zh) * 2020-02-26 2020-06-26 北京京东方显示技术有限公司 一种背光模组、拼接屏及显示装置
CN213092065U (zh) * 2020-09-27 2021-04-30 杭州海康威视数字技术股份有限公司 一种液晶显示模组及液晶显示设备
CN213149433U (zh) * 2020-11-10 2021-05-07 北京京东方显示技术有限公司 一种胶框、背光模组及显示装置

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