WO2021258570A1 - 背光源及显示装置 - Google Patents

背光源及显示装置 Download PDF

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Publication number
WO2021258570A1
WO2021258570A1 PCT/CN2020/117694 CN2020117694W WO2021258570A1 WO 2021258570 A1 WO2021258570 A1 WO 2021258570A1 CN 2020117694 W CN2020117694 W CN 2020117694W WO 2021258570 A1 WO2021258570 A1 WO 2021258570A1
Authority
WO
WIPO (PCT)
Prior art keywords
substrate
layer
light incident
backlight
deflection
Prior art date
Application number
PCT/CN2020/117694
Other languages
English (en)
French (fr)
Inventor
尹炳坤
刘广辉
Original Assignee
武汉华星光电技术有限公司
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 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US17/057,665 priority Critical patent/US11668971B2/en
Publication of WO2021258570A1 publication Critical patent/WO2021258570A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • 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
    • G02F1/133553—Reflecting elements
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0018—Redirecting means on the surface of the light guide
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk of the light guide
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames
    • 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
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • G02F1/133528—Polarisers

Definitions

  • This application relates to the field of display technology, and in particular to a backlight source and a display device.
  • the present application provides a backlight source and a display device, which can reduce the area of the non-display area and increase the screen-to-body ratio by arranging the light incident surface in the edge area of the first surface of the substrate.
  • the backlight and display device described in this application adopt the following technical solutions.
  • the present application provides a backlight source, the backlight source includes a substrate and at least one light source, wherein: the substrate includes a central area and at least one edge area located at the periphery of the central area, and the substrate is in the thickness direction It has a continuous first surface and a continuous second surface, the first surface has at least one light incident surface in the edge area, and the second surface has a second deflection surface in the edge area, so The second deflection surface is a surface formed by the second surface deviating from the surface where the central area is located in the edge region, and is configured to cause incident on the second deflection surface in the substrate
  • the light is deflected and emitted, and the orthographic projection of the light incident surface on the substrate falls within the orthographic projection range of the second deflection surface on the substrate; the light source is opposite or opposite to the light incident surface Contact to provide light to the substrate through the light incident surface; and, the light provided by the light source enters the substrate through the light incident surface and is guided by the substrate to be uniformly
  • the first deflection surface is a surface formed by the first surface deviating from the surface of the central area in the direction toward the second surface in the edge area;
  • the backlight source further includes A placement space on the first deflection surface that is complementary to the shape of the substrate; the placement space is used to place a light source and is filled with an optical medium; the reflective layer is also covered on the first deflection surface The outer surface of the filling space.
  • the first deflection surface is an inclined surface.
  • the filling space is a wedge-shaped space complementary to the substrate.
  • the second deflection surface is an inclined surface.
  • the substrate is provided with a plurality of reflective dots in other regions of the first surface except the light incident surface; and the distribution density of the reflective dots changes along a direction away from the light incident surface. big.
  • the application also provides a backlight source, which includes a substrate and at least one light source,
  • the backlight source further has a reflective layer covering other surfaces of the substrate except the second surface and the light incident surface.
  • the first surface has a first deflection surface in the edge area, and the first deflection surface is formed by the first surface deviating from the surface where the central area is located in the edge area
  • the first deflection surface is configured to deflect light incident on the first deflection surface, and at least a part of the first deflection surface is used for the light incident surface.
  • the first deflection surface is a surface formed by the first surface deviating from the surface of the central area in the direction toward the second surface in the edge area;
  • the backlight source further includes A placement space on the first deflection surface that is complementary to the shape of the substrate; the placement space is used to place a light source and is filled with an optical medium; the reflective layer is also covered on the first deflection surface The outer surface of the filling space.
  • the first deflection surface is an inclined surface.
  • the filling space is a wedge-shaped space complementary to the substrate.
  • the second surface has a second deflection surface in the edge area, and the second deflection surface is formed by the second surface deviating from the surface where the central area is located in the edge area
  • the surface of the substrate is configured to deflect and emit light incident on the second deflection surface in the substrate; the orthographic projection of the light incident surface on the substrate falls into the second deflection surface Within the orthographic projection range of the substrate.
  • the second deflection surface is an inclined surface.
  • the substrate is provided with a plurality of reflective dots in other regions of the first surface except the light incident surface; and the distribution density of the reflective dots changes along a direction away from the light incident surface. big.
  • the substrate is provided with an optical layer group on the second surface, the optical layer group comprising: at least one diffusion layer, the diffusion layer sequentially laminated on the second surface; and, at least one prism layer The prism layer is sequentially laminated on the surface of the diffusion layer away from the substrate.
  • the optical film layer further includes an optical base layer, the optical base layer is located on the second surface of the substrate and covers the second surface; the diffusion layer is coated on the optical base The diffused dot layer in the bottom layer or between the optical base layer and the substrate, the prism layer is a prism structure layer covered in the optical base layer; the substrate has a first refractive index a, the The reflective layer and the prism layer have a second refractive index b, and the optical base layer has a third refractive index c, so a, c, and b satisfy the following relationship: b>a>c.
  • the present application also provides a display device, the display device includes a backlight, the backlight includes a substrate and at least one light source: the substrate includes a central area and at least one edge area located at the periphery of the central area, and The substrate has a continuous first surface and a continuous second surface in its thickness direction, the first surface has at least one light incident surface in the edge region; the light source is opposite to the light incident surface or Contact to provide light to the substrate through the light incident surface; and, the light provided by the light source enters the substrate through the light incident surface and is guided by the substrate to be uniformly emitted from the second surface.
  • the display device includes a display substrate, the display substrate includes the backlight source and a functional layer; the functional layer is disposed on a surface of the backlight source away from the light source, and the functional layer includes At least one of a thin film transistor layer or a filter layer.
  • the display substrate includes a polarizing layer, and the polarizing layer is disposed on a surface of the functional layer facing away from the backlight.
  • the backlight of the present application can reduce the area of the non-display area, increase the screen-to-body ratio, and overcome the problem of the large frame of the existing edge-type backlight
  • the backlight of this application can adjust the light emission effect in the edge area by setting the second deflection surface on the second surface, reduce light loss, and improve the overall luminous efficiency of the backlight; the application of the backlight is passed in The first deflection surface is formed on the substrate, which can adjust the deflection adjustment of the light entering the base, and improve the light source efficiency of the whole substrate; the display substrate of this application is further integrated with the substrate of the backlight
  • At least one of the thin film transistor layer or the color filter layer can realize the integration of the display basics and the backlight, which is beneficial to realize the thinning and light weight of the display panel or the display device; by using the backlight or the display substrate described in this application,
  • the display device described in the present application can achieve the requirements of narrow bezel, light weight and thinner.
  • FIG. 1 is a schematic structural diagram of a first embodiment of the backlight according to this application.
  • Fig. 2 is a light path diagram of the backlight source in Fig. 1.
  • FIG. 3 is a schematic structural diagram of a second embodiment of the backlight according to this application.
  • Fig. 4 is a light path diagram of the backlight source in Fig. 1.
  • FIG. 5 is a schematic structural diagram of an embodiment of the display substrate according to the application.
  • FIG. 6 is a schematic diagram of the first embodiment of the display device described in this application.
  • FIG. 7 is a schematic diagram of a second embodiment of the display device according to this application.
  • the present application provides a backlight source and a display device.
  • a backlight source and a display device.
  • the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.
  • FIG. 1 is a schematic diagram of the structure of the first embodiment of the backlight source of this application
  • FIG. 2 is a light path diagram of the backlight source in FIG. 1.
  • the present application provides a backlight source.
  • the backlight source 100 includes a substrate 10 and a light source 20.
  • the substrate 10 includes a central area 10a and an edge area 10b located at the periphery of the central area 10a, and the substrate 10 includes a continuous first surface 11 and a continuous first surface 11 in the thickness direction thereof.
  • the first surface 11 has at least one light incident surface 111 in the edge region 10b, and the light source 20 is opposite to or in contact with the light incident surface 111 so as to pass through the light incident surface 111.
  • the substrate 10 provides light; the light provided by the light source 20 enters the substrate 10 through the light incident surface 111 and is guided by the substrate 10 to be uniformly emitted from the second surface 12.
  • the backlight 100 of the present application can reduce the area of the non-display area of the display panel by positioning the light source 20 at a position opposite or in contact with the light incident surface 111, thereby increasing the screen-to-body ratio. Finally, the effect of a narrow frame is achieved.
  • the thickness of the substrate 10 in the edge region 10b is smaller than the thickness of the central region 10a.
  • the second surface 12 of the substrate 10 is a continuous plane as a whole.
  • the substrate 10 has a plurality of reflective dots 14 on the first surface 11, and the reflective dots 14 may be circular, rectangular, triangular, or the like.
  • the distribution density of the reflective dots 14 increases along the transmission direction of the light from the substrate 10. In other words, the distribution density of the reflective dots 14 increases along the direction away from the light incident surface 111.
  • the second surface 12 has a second deflection surface 121 in the edge region 10b, and the second deflection surface 121 is formed by the second surface 12 in the edge region 10b.
  • the inner surface is formed by deviating from the surface where the central area 10a is located.
  • the second deflection surface 121 is configured to cause the light incident on the second deflection surface 121 in the substrate 10 to be deflected and emitted toward a predetermined target direction.
  • the second deflection surface 121 can cause the light incident on the second deflection surface 121 in the substrate 10 to be deflected and emitted.
  • the second deflection surface 121 can deflect and adjust the angle of the light emitted through the edge area 10 of the substrate 10 to improve the light utilization rate of the backlight.
  • the second deflection surface 121 is used to deflect the light from the edge area of the backlight toward the effective display area of the display panel, thereby reducing the light directed to the non-display area of the display panel and improving the effective utilization of light.
  • the orthographic projection of the second deflection surface 121 on a display panel covers the frame sealant of the display panel.
  • the second deflection surface 121 is an inclined surface, that is, the second deflection surface 121 is an inclined plane.
  • the second surface 12 is a plane in the central region 10a, and the second deflection surface 121 is an inclined plane adjacent to the plane and forming an angle.
  • this application does not limit the specific structure, arrangement position or size of the second deflection surface 121.
  • the light rays passing through the second deflection surface 121 in the substrate 10 can be deflected according to the preset target direction.
  • the second deflection surface 121 may be a curved surface.
  • the second deflection surface 121 is formed by cutting at least one end of the second surface 12 of the substrate 10, and the cutting method is knife wheel cutting or laser cutting.
  • the second deflection surface 121 formed by cutting is an inclined surface.
  • the substrate 10 is made of a material that can be used for a light guide plate or a light guide layer.
  • the substrate 10 is made of polymethyl methacrylate PMMA, polycarbonate PC, polyethylene PE, polypropylene PP, polyethylene terephthalate PET, or polyimide PI.
  • the reflective dots 14 are formed by recessing the second surface 12 toward the second surface 12.
  • the cross-section of the reflective dots 14 is semicircular.
  • the cross-section of the reflective dots 14 may be triangular or other cross-sectional shapes with a scattering function.
  • the light source 20 is opposite to or in contact with the light incident surface 111.
  • the light source 20 is held on the light incident surface 111.
  • the light source 20 can hold the light source 20 on the surface of the substrate 10 through the cooperation of a back plate.
  • the light source 20 may be fixed or held on the second surface 12 by means of optical glue or a backlight frame.
  • the orthographic projection of the light source 20 on the substrate 10 falls within the orthographic projection of the second deflection surface 121 on the substrate 10.
  • the orthographic projection of the light source 20 on a display panel corresponds to the sealant of the display panel.
  • the light source 20 may be an LED light source.
  • the backlight source 100 further includes a reflective layer 30 covering other surfaces of the substrate 10 except for the second surface 12 and the light incident surface 111 .
  • the substrate 10 further includes a plurality of side surfaces 13 adjacent to the first surface 11 and the second surface 12, and the reflective layer 30 covers the first surface of the substrate 10. An area of the surface 11 excluding the light incident surface 111 and the side surface 13 of the substrate 10.
  • the reflective layer 30 may adopt a single-layer structure or a multilayer laminated structure.
  • the film layer used to form the reflective layer 30 may be at least one of a light reflective film or a metal reflective layer.
  • the metal reflective layer may be a metal with a reflective function or a light-reflecting function.
  • the metal having a reflective function or a light-reflecting function may be, but is not limited to, aluminum (Al) or silver (Ag).
  • the metal reflective layer can be formed by using PVD process deposition.
  • the reflective layer 30 can be a reflective film that can be directly attached.
  • an optical layer group 40 is further provided on the first surface 11 of the substrate 10, and the optical layer group 40 includes at least one diffusion layer 41 and at least one prism layer 42.
  • the diffusion layer 41 is disposed on the second surface 12 of the substrate 10, and the prism layer 42 is disposed on the surface of the diffusion layer 41 facing away from the substrate 10.
  • the diffusion layer 41 can directly adopt a diffusion sheet or a diffusion plate.
  • the diffusion layer 41 may also be a light diffusion material layer directly formed on the substrate 10 from a material having light diffusion properties, or may be a light-transmitting material formed on the substrate 10.
  • Layer diffusion structure layer This application does not specifically limit the structure, form or material of the diffusion layer 41. As long as the actual configuration of the diffusion layer 41 is reasonable, the effect of diffusing the incident light can be achieved.
  • the optical layer group 40 includes a first prism layer in contact with the diffusion layer 41 and a second prism layer on the surface of the first prism layer away from the diffusion layer 41.
  • Floor As shown in FIG. 1, in this embodiment, the optical layer group 40 includes a first prism layer in contact with the diffusion layer 41 and a second prism layer on the surface of the first prism layer away from the diffusion layer 41.
  • the prism layer 42 may directly adopt a prism sheet or a prism plate.
  • the optical layer group 40 can also include other optical functional layers, such as, but not limited to, a fluorescent layer or a polarizing layer.
  • other optical functional layers such as, but not limited to, a fluorescent layer or a polarizing layer.
  • FIG. 3 is a schematic structural diagram of a second embodiment of the backlight according to this application.
  • Fig. 4 is a light path diagram of the backlight source in Fig. 1.
  • the biggest difference of the backlight source shown in FIG. 2 lies in the substrate 10 and the optical module 40.
  • the first surface 11 has at least one first deflection surface 112 in the edge region 10 b, and at least a part of the first deflection surface 112 is used for the light incident surface 111.
  • the first deflection surface 112 is used for the light incident surface 111.
  • the first deflection surface 112 is a surface formed by the first surface 11 deviating from the surface where the central area 10a is located in the edge area 10b, and the first deflection surface The surface 112 is configured to deflect light incident on the first deflection surface 112 and enter the substrate 10.
  • the orthographic projection of the light source 20 on the substrate 10 falls within the orthographic projection range of the first deflection surface 112 on the substrate 10.
  • the first deflection surface 112 serves as the light incident surface 111, which can adjust the deflection of the light that is about to enter the substrate 10, and reduce the light loss of the light source 20, so as to ensure that the light of the light source 20 can be A larger incident angle is transmitted to the substrate 10, reducing the deflection angle of light after entering the substrate 10 due to refraction, so as to solve the hotspot phenomenon caused by the refraction of the light emitted by the light source 20 entering the substrate 10, thereby improving the appearance of the substrate 10 The problem of dark bands and uneven brightness, so it can improve the overall luminous efficiency of the backlight.
  • the orthographic projection of the first deflection surface 112 on a display panel covers the frame sealant of the display panel.
  • the first deflection surface 112 is an inclined surface, that is, the first deflection surface 112 is an inclined plane.
  • the first surface 11 is a plane in the central region 10a, and the first deflection surface 112 is an inclined plane adjacent to the plane and forming an angle.
  • the application does not limit the specific structure, arrangement position, or size of the first deflection surface 112.
  • the first deflection surface 112 may be a curved surface.
  • the first deflection surface 112 is formed by cutting at least one side edge of the first surface 12 of the substrate 10, and the cutting method is knife wheel cutting or laser cutting.
  • the first deflection surface 112 is a surface formed by the first surface 11 deviating from the surface where the central area 10a is located toward the second surface 12 in the edge area 10b;
  • the backlight source 100 defines a filling space 50 complementary to the shape of the substrate 10 on the first deflection surface 112 through an optical medium, and the light source 20 is arranged in the filling space.
  • the optical medium in the filled space 50 has a fourth refractive index d
  • the substrate has a first refractive index a
  • a and d satisfy the following relationship a>b.
  • the optical medium may use optical glue, and the refractive index of the optical glue is smaller than the refractive index of the substrate 10.
  • the reflective layer 30 covers the surface of the filling space away from the first deflection surface 121.
  • the installation space is filled with optical glue, and the refractive index of the optical glue is smaller than the refractive index of the substrate.
  • the second surface 12 is a continuous plane.
  • the optical layer group 40 includes an optical base layer 43, at least one diffusion layer 41 and at least one prism layer 42.
  • the base layer 43 is located on the second surface 12 of the substrate 10 and is in contact with the second surface 12.
  • the optical base layer 43 may be directly formed on the second surface 12 of the substrate 10 by coating or coating.
  • the diffusion layer 42 is a diffusion dot layer located between the second surface 12 and the optical base layer 43, or wrapped in the optical base layer 43.
  • the prism layer 42 is a prism structure layer covered in the optical base layer 43.
  • the substrate 10 has a first refractive index a
  • the diffusion layer 41 and the prism layer 42 have a second refractive index b
  • the optical base layer 43 has a third refractive index c, so a, c And b satisfies the following relationship: b>a>c.
  • the backlight 100 of the present application can control the uniformity and concentration of the emitted light.
  • the diffused dot layer or the optical base layer 43 can be made by etching or embossing.
  • FIG. 5 is a schematic structural diagram of an embodiment of the display substrate according to the application. As shown in FIG. 5, the present application also provides a display substrate.
  • the display substrate includes the backlight source 100 of the present application and a functional layer 60 disposed on the second surface 11 of the backlight source 100.
  • the layer 60 includes at least one of a thin film transistor layer or a filter layer.
  • the display substrate 200 may be one of an array substrate, a color filter substrate, or a COA type substrate with the substrate 10 of the backlight 100 as a base substrate.
  • the functional layer 60 can be fabricated through film formation, exposure, development, and etching processes.
  • the display substrate 200 includes the backlight source 100 shown in FIG. 2. It should be pointed out that the display substrate 200 described in the present application is not limited to the backlight source 100 shown in FIG. 2. For example, the display substrate 200 may also use the backlight source shown in FIG. 1, and may also use other configurations of the backlight source 100 described in the present application.
  • planarization layer 80 (not shown in the figure) between the functional layer 60 and the substrate 10, and the planarization layer 80 can planarize the step difference of the optical layer group 40.
  • a polarizing layer 70 is provided on the surface of the functional layer 60 facing away from the substrate 10.
  • the polarizing layer 70 may be a wire grid polarizer layer composed of a plurality of wire grid polarizers, or may be a polarizer.
  • the polarizing layer 70 is a wire grid polarizer layer with higher light recovery efficiency.
  • the display substrate described in the present application can integrate the light source 20 into an array substrate, a color filter substrate or a COA type substrate, so that it can be used to realize a narrow frame, lightness and thinness of a display panel or a display device.
  • the present application also provides a display device, which includes the backlight source of the present application or the display substrate of the present application.
  • FIG. 6 is a schematic diagram of the first embodiment of the display device described in this application.
  • the display device includes a display panel.
  • the display panel includes a display substrate 200, a counter substrate 300 arranged in a box with the display substrate 200, and liquid crystals located between the display substrate 200 and the counter substrate 300.
  • the display substrate 200 is the display substrate 200 described in this application, and for its specific structure and function, please refer to the above, which will not be repeated here.
  • the display substrate 200 is an array substrate, and in this case, the counter substrate 300 is a color filter substrate.
  • the display substrate 200 may also be a COA substrate or a color filter substrate, and the counter substrate 300 may correspondingly be a transparent substrate or an array substrate.
  • the counter substrate 300 includes a base substrate 310 and another polarizing layer 320 disposed on the surface of the base substrate 310 away from the display substrate.
  • a frame sealant is provided between the peripheral positions between the display substrate 200 and the counter substrate 300, and the frame sealant is used to seal the liquid crystal.
  • the orthographic projection of the sealant on the substrate 10 falls within the orthographic projection range of the first deflection surface 112 and the second deflection surface 121 on the substrate 10. Therefore, the display substrate 200 can deflect the light of the light source 20 toward the effective display area located in the frame sealant, so as to improve the light utilization rate of the light source 20 by the display device.
  • FIG. 7 is a schematic diagram of a second embodiment of the display device according to this application.
  • the display device includes a display panel 400 and a backlight source 100.
  • the display panel 100 may adopt a common liquid crystal display panel, and the structure of the common liquid crystal display panel will not be repeated here.
  • the backlight source 100 is the backlight source 100 described in this application, and for its specific structure, please refer to the above, and will not be repeated here.

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Abstract

一种背光源（100）及显示装置，背光源（100）包括一基板（10）和至少一光源（20），基板（10）在其厚度方向上具有一连续的第一表面（11）和一连续的第二表面（12），第一表面（11）在边缘区域（10a）内具有至少一光入射面（111）；光源（20）与光入射面（111）相对或相接触，以通过光入射面（111）向基板（10）提供光。

Description

背光源及显示装置
本申请要求于2020年06月23日提交中国专利局、申请号为202010577340.6、发明名称为“背光源、显示基板及显示装置”的中国专利申请的优先权，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，尤其涉及一种背光源及显示装置。
 背景技术
随着数字科技的发展，液晶显示产品已广泛的应用在日常生活的各个层面中。当前的移动终端市场对高屏占比的设计需求越来越高。因而，如何在液晶显示屏设计上压缩非显示区边框成为各家厂商设计的焦点。
现有液晶显示产品多将背光的LED光源放在导光板的侧边，由于LED光源尺寸限制，使得背光的边框无法无限的缩小，进而，影响整个显示屏的边框大小。
因此，亟需提供一种背光源及显示装置，以解决上述问题。
 技术问题
为了解决上述问题，本申请提供一种背光源及显示装置，通过将光入射面设置基板的第一表面的边缘区域内，能缩小非显示区的面积，提升屏占比。
 技术解决方案
为了实现上述目的，本申请所述背光源及显示装置采取了以下技术方案。
本申请提供一种背光源，所述背光源包括一基板和至少一光源，其中：所述基板包括中心区域和位于所述中心区域外围的至少一边缘区域，并且所述基板在其厚度方向上具有连续的第一表面和连续的第二表面，所述第一表面在所述边缘区域内具有至少一光入射面所述第二表面在所述边缘区域内具有一第二偏折面，所述第二偏折面为由所述第二表面在所述边缘区域内偏离所述中心区域所在表面而形成的表面并被配置为使所述基板内的入射至所述第二偏折面的光线发生偏折并射出，所述光入射面在所述基板的正投影落入所述第二偏折面在所述基板的正投影范围内；所述光源与所述光入射面相对或相接触，以通过所述光入射面向所述基板提供光线；并且，由所述光源提供的光线经光入射面进入所述基板并经所述基板的引导由所述第二表面均匀射出；进一步，所述第一表面在所述边缘区域内具有一第一偏折面，所述第一偏折面为由所述第一表面在所述边缘区域内偏离所述中心区域所在表面而形成的表面；所述第一偏折面被配置为使入射至所述第一偏折面的光线发生偏折，并且所述第一偏折面的至少部分区域用于所述光入射面。
进一步，所述第一偏折面为由所述第一表面在所述边缘区域内朝向所述第二表面的方向偏离所述中心区域所在表面而形成的表面；所述背光源还包括位于所述第一偏折面上的并与所述基板形状互补的一放置空间；所述放置空间用于放置光源并填充有光学介质；所述反射层还包覆位于所述第一偏折面上的所述填充空间的外表面。
进一步，所述第一偏折面为一倾斜面.所述填充空间为与所述基板互补的楔形空间。
进一步，所述第二偏折面为一倾斜面。
进一步，所述基板在所述第一表面的除所述光入射面以外的其他区域内设置有多个反射网点；并且，所述反射网点的分布密度沿着远离所述光入射面的方向变大。
本申请还提供一种背光源，所述背光源包括一基板和至少一光源，
进一步，所述背光源还具有一反射层，所述反射层覆盖于所述基板的除所述第二表面和所述光入射面之外的其它表面上。
进一步，所述第一表面在所述边缘区域内具有一第一偏折面，所述第一偏折面为由所述第一表面在所述边缘区域内偏离所述中心区域所在表面而形成的表面；所述第一偏折面被配置为使入射至所述第一偏折面的光线发生偏折，并且所述第一偏折面的至少部分区域用于所述光入射面。
进一步，所述第一偏折面为由所述第一表面在所述边缘区域内朝向所述第二表面的方向偏离所述中心区域所在表面而形成的表面；所述背光源还包括位于所述第一偏折面上的并与所述基板形状互补的一放置空间；所述放置空间用于放置光源并填充有光学介质；所述反射层还包覆位于所述第一偏折面上的所述填充空间的外表面。
进一步，所述第一偏折面为一倾斜面.所述填充空间为与所述基板互补的楔形空间。
进一步，所述第二表面在所述边缘区域内具有一第二偏折面，所述第二偏折面为由所述第二表面在所述边缘区域内偏离所述中心区域所在表面而形成的表面并被配置为使所述基板内的入射至所述第二偏折面的光线发生偏折并射出；所述光入射面在所述基板的正投影落入所述第二偏折面在所述基板的正投影范围内。
进一步，所述第二偏折面为一倾斜面。
进一步，所述基板在所述第一表面的除所述光入射面以外的其他区域内设置有多个反射网点；并且，所述反射网点的分布密度沿着远离所述光入射面的方向变大。
进一步，所述基板在所述第二表面上设置有一光学层组，所述光学层组包括： 至少一扩散层，所述扩散层依次层叠于所述第二表面上；以及，至少一棱镜层，所述棱镜层依次层叠于所述扩散层的背离所述基板的表面上。
进一步，所述光学膜层还包括一光学基底层，所述光学基底层位于所述基板的所述第二表面上并覆盖所述第二表面；所述扩散层为包覆于所述光学基底层内或所述光学基底层和所述基板之间的扩散网点层，所述棱镜层为包覆于所述光学基底层内的棱镜结构层；所述基板具有第一折射率a，所述反射层和所述棱镜层具有第二折射率b，所述光学基底层具有第三折射率c，则a、c及b满足以下关系：b>a>c。
本申请还提供一种显示装置，所述显示装置包括一背光源，所述背光源包括一基板和至少一光源：所述基板包括中心区域和位于所述中心区域外围的至少一边缘区域，并且所述基板在其厚度方向上具有连续的第一表面和连续的第二表面，所述第一表面在所述边缘区域内具有至少一光入射面；所述光源与所述光入射面相对或相接触，以通过所述光入射面向所述基板提供光线；并且，由所述光源提供的光线经光入射面进入所述基板并经所述基板的引导由所述第二表面均匀射出。
进一步，所述显示装置包括一显示基板，所述显示基板包括所述背光源和一功能层；所述功能层设置在所述背光源的远离所述光源的表面上，并且所述功能层包括薄膜晶体管层或滤光层中的至少一层。
进一步，所述显示基板包括一偏光层，所述偏光层设置于所述功能层背离所述背光源的表面上。
 有益效果
本申请所述背光源通过将光源安装于所述基板的第一表面的边缘区域内，能缩小非显示区的面积，提升屏占比，克服现有侧入式背光源的边框较大的问题；本申请所述背光源通过在第二表面设置第二偏折面本能对边缘区域内的出光效果进行调整，减少光损失，提升所述背光源整体的发光效率；申请所述背光源通过在基板上形成第一偏折面，能调整将进入所述基本内的光线进行偏折调整，提升基板整体的光源效率；本申请所述显示基板以所述背光源的基板为衬底进一步集成了薄膜晶体管层或滤色层中的至少一层，能实现显示基本和背光源的集成，有利于实现显示面板或显示装置的薄型化和轻量化；通过采用本申请所述背光源或显示基板，能实现本申请所述显示装置能实现窄边框、轻量化和薄型化的需求。
 附图说明
图1为本申请所述背光源的第一实施例的结构示意图。
图2为图1中所述背光源的光路图。
图3为本申请所述背光源的第二实施例的结构示意图。
图4为图1中所述背光源的光路图。
图5为本申请所述显示基板的一实施例的结构示意图。
图6为本申请所述显示装置的第一实施例的示意图。
图7为本申请所述显示装置的第二实施例的示意图。
 本发明的实施方式
本申请提供一种背光源及显示装置，为使本申请的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本申请进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
图1为本申请所述背光源的第一实施例的结构示意图，图2为图1中所述背光源的光路图。如图1所示，本申请提供一种背光源，所述背光源100包括基板10和光源20。
请续见图1，所述基板10包括中心区域10a和位于所述中心区域10a外围的边缘区域10b，并且所述基板10在其厚度方向上包括一连续的第一表面11和一连续的第二表面12，所述第一表面11在所述边缘区域10b内具有至少一光入射面111，所述光源20与所述光入射面111相对或相接触，以通过所述光入射面111向所述基板10提供光线；由所述光源20提供的光线经光入射面111进入所述基板10并经所述基板10的引导由所述第二表面12均匀射出。
本申请所述背光源100通过将所述光源20定位于在与所述光入射面111相对或相接触的位置处,能减小显示面板的非显示区的面积，进而能提升屏占比，最终实现窄边框的效果。
如图1所示，所述基板10在所述边缘区域10b内厚度小于所述中心区域10a的厚度。
如图1所示，所述基板10的第二表面12整体为一连续的平面。
如图1所示，所述基板10在所述第一表面11上具有复数个反射网点14，反射网点14可以为圆形、矩形或三角形等形状。
优选地，反射网点14的分布密度沿着所述基板10光线的传输方向变大。或者说，所述反射网点14的分布密度沿着远离所述光入射面111的方向变大。
如图1所示，所述第二表面12在所述边缘区域10b内具有一第二偏折面121，所述第二偏折面121为由所述第二表面12在所述边缘区域10b内偏离所述中心区域10a所在表面而形成的表面。所述第二偏折面121被配置为使所述基板10内的入射至所述第二偏折面121的光朝向预设目标方向发生偏折并射出。
如图2所示，所述第二偏折面121能使得所述基板10内的入射至所述第二偏折面121的光线发生偏折并出射。也就是说，所述第二偏折面121能对经所述基板10的边缘区域10出射的光线的角度进行偏转调整，以提高背光源的光线利用率。例如，利用第二偏折面121，使所述背光源的边缘区域光线朝向显示面板的有效显示区域内偏折，从而减少射向显示面板非显示区的光线，提高光线的有效利用率。
作为一优选实施方式，所述第二偏折面121在一显示面板上的正投影覆盖所述显示面板的封框胶。
请续见图1，作为一优选实施结构，所述第二偏折面121为一倾斜面，即所述第二偏折面121为一斜平面。例如，在本实施例中，所述第二表面12在所述中心区域10a内为一平面，所述第二偏折面121为与所述平面相邻接并呈一角度的斜平面。
此处需要指出的是，本申请并未限定所述第二偏折面121的具体结构、布置位置或尺寸进行限定。在实际设计时，只要所述第二偏折面121的配置方式合适，能使基板10内将由第二偏折面121穿出的光线按照预设目标方向进行偏折即可。例如，在其他实施结构中，所述第二偏折面121可以选用曲面。
在具体实施时，通过对所述基板10的第二表面12的至少一个端进行切割处理形成所述第二偏折面121，所述切割方式为刀轮切割或激光切割。在本实施例中切割形成的所述第二偏折面121为倾斜面。
在具体实施时，所述基板10采用能用于导光板或导光层的材料制成。例如，所述基板10为采用聚甲基丙烯酸甲酯PMMA、聚碳酸酯PC、聚乙烯PE、聚丙烯PP、聚对苯二甲酸乙二醇酯PET或聚酰亚胺PI制成。
具体地，所述反射网点14由第二表面12朝向第二表面12凹陷形成。例如，在本实施例中，所述反射网点14的截面呈半圆形，在其他实施例中，所述反射网点14的截面形成可以为三角形或者其他具有散射功能的截面形状。
如图1所示，所述光源20与所述光入射面111相对或接触。例如，在本实施例中，所述光源20被保持于所述光入射面111上。
其中，“被保持”是强调所述光源20定位于或固定。本申请在此并未限定所述光源20与基板10的连接关系。例如，在本实施例中，所述光源20能通过一背板的配合将所述光源20保持于所述基板10的表面上。在其他实施例中，所述光源20可以通过光学胶或者背光框等方式固定或保持于所述第二表面12上。
如图1所示，所述光源20在所述基板10的正投影落入所述第二偏折面121在所述基板10上的正投影内。
作为一优选实施方式，所述光源20在一显示面板上的正投影对应于所述显示面板的封框胶。
在具体实施时，所述光源20可以为LED光源。
值得指出的是，本申请并未限定所述光源20在所述基板10上的具体分布或排列方式，也未限定所述光源20的具体数目或数量。
如图1所示，所述背光源100还包括一反射层30，所述反射层30覆盖于所述基板10的除所述第二表面12和所述光入射面111之外的其它表面上。 例如，在本实施例中，所述基板10还包括与所述第一表面11和所述第二表面12相邻接的复数个侧面13, 所述反射层30覆盖于所述基板10的第一表面11的除所述光入射面111之外的区域和所述基板10的侧面13上。
具体地，所述反射层30可以采用单层结构或多层层叠结构。用于构成所述反射层30的膜层可以为反光膜或金属反射层中至少一种。其中，所述金属反射层可以为具有反射功能或反光功能的金属。所述具有反射功能或反光功能的金属可以为但不限于铝（Al）或银(Ag)。所述金属反射层能通过采用PVD工艺沉积的方式形成。所述反射层30可以选用能直接进行贴附的反光膜。
如图1所示，在所述基板10的第一表面11上还设置有一光学层组40，所述光学层组40包括至少一扩散层41以及至少一棱镜层42。其中，所述扩散层41设置于所述基板10的第二表面12上，所述棱镜层42设置于所述扩散层41的背离所述基板10的表面上。
在本实施例中，所述扩散层41可直接采用扩散片或扩散板。在其他实施例中，所述扩散层41也可以为直接由具有光扩散性能材料形成于所述基板10的上的光扩散材料层，还可以为透光材料形成于所述基板10上的一层扩散结构层。本申请并未对所述扩散层41的结构、形式或材料进行具体限定。只要所述扩散层41实际配置合理，能达到对入射的光线进行扩散的效果即可。
如图1所示，在本实施例中，所述光学层组40包括与所述扩散层41接触的第一棱镜层和位于所述第一棱镜层背离扩散层41的表面上的第二棱镜层。
在本实施例中，所述棱镜层42可直接采用棱镜片或棱镜板。
在其他实施例中，所述光学层组40还能包括其他光学功能层，例如，但不限于荧光层或偏光层。同时，需要注意的是，本申请也并未对所述反射层41或所述棱镜层42的具体结构进行限定。也就是说，所属领域的技术人员可以依据本申请的教导依据实际设计需求对所述光学层组40的进行实验设置或改进设计，属于本领域内较常见的技术手段，在此不进行详细说明。
图3为本申请所述背光源的第二实施例的结构示意图。图4为图1中所述背光源的光路图。
如图3所示，与图1所示实施例中的背光源相比，图2所示背光源的最大区别特征在于所述基板10及所述光学模组40。
如图3所示，所述第一表面11在所述边缘区域10b内具有至少一第一偏折面112，所述第一偏折面112的至少部分区域用于所述光入射面111。例如，如图2所示，在本实施例中，所述第一偏折面112的用于所述光入射面111。
如图3所示，所述第一偏折面112面为由所述第一表面11在所述边缘区域10b内偏离所述中心区域10a所在表面而形成的表面，并且所述第一偏折面112并被配置为使入射至所述第一偏折面112光线发生偏折并进入所述基板10内。
如图3所示，所述光源20在所述基板10的正投影落入所述第一偏折面112在所述基板10的正投影范围内。
如图4所示，所述第一偏折面112作为光入射面111，能对即将进入所述基板10的光线进行偏折调整，减少光源20的光线损失，以确光源20的光线能够以较大入射角度传输至基板10内，减小光线进入基板10后由于折射产生的偏折角度，以解决由于光源20所发出光线进入基板10产生折射而导致的hotspot现象，由此改善基板10出现暗带及亮度不均的问题，因此能够提升背光源整体的发光效率。
作为一优选实施方式，所述第一偏折面112在一显示面板上的正投影覆盖所述显示面板的封框胶。
如图3所示，所述第一偏折面112为一倾斜面，即所述第一偏折面112为一斜平面。例如，在本实施例中，所述第一表面11在所述中心区域10a内为一平面，所述第一偏折面112为与所述平面相邻接并呈一角度的斜平面。
相似地，此处需要指出的是，本申请并未限定所述第一偏折面112的具体结构、布置位置或尺寸进行限定。在实际设计时，只要所述第一偏折面112的配置方式合适，能使将由第一偏折面112进入基板10内的光线按照预设目标方向进行偏折即可。例如，在其他实施结构中，所述第一偏折面112可以选用曲面。
在具体实施时，通过对所述基板10的第一表面12的至少一个侧边进行切割处理形成所述第一偏折面112，所述切割方式为刀轮切割或激光切割。
如图3所示，所述第一偏折面112为由所述第一表面11在所述边缘区域10b内朝向第二表面12偏离所述中心区域10a所在表面而形成的表面；
所述背光源100通过光学介质在所述第一偏折面112上定义出与所述基板10形状互补的一填充空间50，所述光源20设置在所述填充空间内。
具体地，所述填充空间50内的光学介质具有第四折射率d，所述基板具有第一折射率a，则a和d满足以下关系a>b。
在具体实施时，所述光学介质可以采用光学胶，所述光学胶的折射率小于所述基板10的折射率。
如图3所示，所述反射层30覆盖所述填充空间的背离所述第一偏折面121的表面上。所述安装空间内填充有光学胶，所述光学胶的折射率小于所述基板的折射率。
如图3所示，所述第二表面12为一连续的平面。
如图3所示，所述光学层组40包括光学基底层43、至少一扩散层41以及至少一棱镜层42。
如图3所示，所述学基底层43位于所述基板10的第二表面12上并与所述第二表面12相接触。在具体实施时，所述光学基底层43可通过镀膜或涂布的方式直接形成于所述基板10的第二表面12上。
如图3所示，所述扩散层42为位于所述第二表面12和所述光学基底层43之间，或者，包覆于所述光学基底层43层内的一扩散网点层。所述棱镜层42为包覆于所述光学基底层43内的棱镜结构层。
具体地，所述基板10的具有第一折射率a，所述扩散层41和所述棱镜层42具有第二折射率b，所述光学基底层43具有第三折射率c，则a、c及b满足以下关系：b>a>c。
通过调整所述基板10、学基底层43、扩散层41以及棱镜层42的折射率，本申请所述背光源100能调控其出射光线的均匀程度和集中程度。
在具体实施时，所述扩散网点层或所述光学基底层43能采用蚀刻或压印的方法制作。
图5为本申请所述显示基板的一实施例的结构示意图。如图5所示，本申请还提供一种显示基板，所述显示基板包括本申请所述背光源100以及设置于所述背光源100的第二表面11上的一功能层60，所述功能层60包括薄膜晶体管层或滤光层中的至少一种。
详细来讲，所述显示基板200可以为以所述背光源100的所述基板10为衬底基板的阵列基板、彩膜基板或COA型基板中的一种。在具体实施时，所述功能层60能通过成膜、曝光、显影及刻蚀工艺过程制作。
如图5所示，在本实施例中，所述显示基板200包括图2所示的背光源100。需要指出的是，本申请所述显示基板200并未限定于必须采用图2所示的背光源100。例如，所述显示基板200也可以才采用图1所示的背光源，还可以采用其他配置的本申请所述的背光源100。
如图5所示，在所述功能层60与所述基板10之间具有一平坦化层80（图中未标示），所述平坦化层80能平坦化所述光学层组40的段差。
如图5所示，所述功能层60的背离所述基板10的表面上设置有一偏振层70。在具体实施时，所述偏振层70可以为由多个线栅偏振器构成的一线栅偏振器层，还可以为一偏光片。例如，在本实施例中，所述偏振层70选用光回收效率较高的线栅偏振器层。
很显然，本申请所述显示基板能将光源20集成为一阵列基板、彩膜基板或COA型基板，从而能用于实现显示面板或显示装置的窄边框、轻薄化和薄型化。
本申请还提供一种显示装置，所述显示装置包括本申请所述背光源或本申请所述显示基板。
图6为本申请所述显示装置的第一实施例的示意图。如图6所示，所述显示装置包括一显示面板。其中所述显示面板包括一显示基板200、及与所述显示基板200对盒设置的一对置基板300以及位于所述显示基板200和所述对置基板300之间的液晶。其中，所述显示基板200为本申请所述显示基板200，其具体结构和功能请参考上文，此处不再赘述。
如图6所示，作为一优选实施例，所述显示基板200为一阵列基板，此时所述对置基板300为一彩膜基板。作为可选的实施方式，所述显示基板200还可以为COA基板或一彩膜基板，所述对置基板300相应对应地可以为一透明基板或一阵列基板。
如图6所示，所述对置基板300包括一衬底基板310和设置于所述衬底基板310的远离所述显示基板的表面上设置有另一偏振层320。
如图6所示，在所述显示基板200和所述对置基板300之间的周边位置之间设置有封框胶，所述封框胶用于密封所述液晶。
如图6所示，所述框胶在所述基板10上的正投影落入第一偏折面112和所述第二偏折面121在所述基板10上的正投影范围内。从而，所述显示基板200能使得光源20的光线朝向位于所述封框胶内的有效显示区内偏折，以提高所述显示装置对所述光源20的光线利用率。
图7为本申请所述显示装置的第二实施例的示意图。如图7所示，在本实施例中，所述显示装置包括一显示面板400和一背光源100。其中，所述显示面板100可以采用常见的液晶显示面板，所述常见的液晶显示面板的结构此处不再赘述。所述背光源100为本申请所述背光源100，其具体结构请参考上文，此处不再赘述。
以上各个操作的具体实施可参见前面的实施例，在此不再赘述。
可以理解的是，对本领域普通技术人员来说，可以根据本申请的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本申请所附的权利要求的保护范围。

Claims (19)

  1. 一种背光源，所述背光源包括一基板和至少一光源，其中：
    所述基板包括中心区域和位于所述中心区域外围的至少一边缘区域，并且所述基板在其厚度方向上具有连续的第一表面和连续的第二表面，所述第一表面在所述边缘区域内具有至少一光入射面，所述第二表面在所述边缘区域内具有一第二偏折面，所述第二偏折面为由所述第二表面在所述边缘区域内偏离所述中心区域所在表面而形成的表面并被配置为使所述基板内的入射至所述第二偏折面的光线发生偏折并射出；所述光入射面在所述基板的正投影落入所述第二偏折面在所述基板的正投影范围内；
    所述光源与所述光入射面相对或相接触，以通过所述光入射面向所述基板提供光线，并且由所述光源提供的光线经光入射面进入所述基板并经所述基板的引导由所述第二表面均匀射出；
    所述背光源还具有一反射层，所述反射层覆盖于所述基板的除所述第二表面和所述光入射面之外的其它表面上。
  2. 如权利要求1所述的背光源，其中，所述第一表面在所述边缘区域内具有一第一偏折面，所述第一偏折面为由所述第一表面在所述边缘区域内偏离所述中心区域所在表面而形成的表面；
    所述第一偏折面被配置为使入射至所述第一偏折面的光线发生偏折，并且所述第一偏折面的至少部分区域用于所述光入射面。
  3. 如权利要求2所述的背光源，其中，所述第一偏折面为由所述第一表面在所述边缘区域内朝向所述第二表面的方向偏离所述中心区域所在表面而形成的表面；
    所述背光源还包括位于所述第一偏折面上的并与所述基板形状互补的一放置空间；
    所述放置空间用于放置光源并填充有光学介质；
    所述反射层还包覆位于所述第一偏折面上的所述填充空间的外表面。
  4. 如权利要求3所述的背光源，其中，所述第一偏折面为一倾斜面,所述填充空间为与所述基板互补的楔形空间。
  5. 如权利要求4所述的背光源，其中，所述第二偏折面为一倾斜面。
  6. 如权利要求1所述的背光源，其中，所述基板在所述第一表面的除所述光入射面以外的其他区域内设置有多个反射网点；
    并且，所述反射网点的分布密度沿着远离所述光入射面的方向变大。
  7. 一种背光源，所述背光源包括一基板和至少一光源，其中：
    所述基板包括中心区域和位于所述中心区域外围的至少一边缘区域，并且所述基板在其厚度方向上具有连续的第一表面和连续的第二表面，所述第一表面在所述边缘区域内具有至少一光入射面；
    所述光源与所述光入射面相对或相接触，以通过所述光入射面向所述基板提供光线；
    并且，由所述光源提供的光线经光入射面进入所述基板并经所述基板的引导由所述第二表面均匀射出。
  8. 如权利要求7所述的背光源，其中，所述背光源还具有一反射层，所述反射层覆盖于所述基板的除所述第二表面和所述光入射面之外的其它表面上。
  9. 如权利要求8所述的背光源，其中，所述第一表面在所述边缘区域内具有一第一偏折面，所述第一偏折面为由所述第一表面在所述边缘区域内偏离所述中心区域所在表面而形成的表面；
    所述第一偏折面被配置为使入射至所述第一偏折面的光线发生偏折，并且所述第一偏折面的至少部分区域用于所述光入射面。
  10. 如权利要求9所述的背光源，其中，所述第一偏折面为由所述第一表面在所述边缘区域内朝向所述第二表面的方向偏离所述中心区域所在表面而形成的表面；
    所述背光源还包括位于所述第一偏折面上的并与所述基板形状互补的一放置空间；
    所述放置空间用于放置光源并填充有光学介质；
    所述反射层还包覆位于所述第一偏折面上的所述填充空间的外表面。
  11. 如权利要求10所述的背光源，其中，所述第一偏折面为一倾斜面.所述填充空间为与所述基板互补的楔形空间。
  12. 如权利要求7所述的背光源，其中，所述第二表面在所述边缘区域内具有一第二偏折面，所述第二偏折面为由所述第二表面在所述边缘区域内偏离所述中心区域所在表面而形成的表面并被配置为使所述基板内的入射至所述第二偏折面的光线发生偏折并射出；
    所述光入射面在所述基板的正投影落入所述第二偏折面在所述基板的正投影范围内。
  13. 如权利要求12所述的背光源，其中，所述第二偏折面为一倾斜面。
  14. 如权利要求7所述的背光源，其中，所述基板在所述第一表面的除所述光入射面以外的其他区域内设置有多个反射网点；
    并且，所述反射网点的分布密度沿着远离所述光入射面的方向变大。
  15. 如权利要求7所述的背光源，其中，所述基板在所述第二表面上设置有一光学层组，所述光学层组包括：
    至少一扩散层，所述扩散层依次层叠于所述第二表面上；以及，
    至少一棱镜层，所述棱镜层依次层叠于所述扩散层的背离所述基板的表面上。
  16. 如权利要求15所述的背光源，其中，所述光学膜层还包括一光学基底层，所述光学基底层位于所述基板的所述第二表面上并覆盖所述第二表面；
    所述扩散层为包覆于所述光学基底层内或所述光学基底层和所述基板之间的扩散网点层，所述棱镜层为包覆于所述光学基底层内的棱镜结构层；
    所述基板具有第一折射率a，所述反射层和所述棱镜层具有第二折射率b，所述光学基底层具有第三折射率c，则a、c及b满足以下关系：b>a>c。
  17. 一种显示装置，所述显示装置包括一背光源，其中，所述背光源包括一基板和至少一光源：
    所述基板包括中心区域和位于所述中心区域外围的至少一边缘区域，并且所述基板在其厚度方向上具有连续的第一表面和连续的第二表面，所述第一表面在所述边缘区域内具有至少一光入射面；
    所述光源与所述光入射面相对或相接触，以通过所述光入射面向所述基板提供光线；
    并且，由所述光源提供的光线经光入射面进入所述基板并经所述基板的引导由所述第二表面均匀射出。
  18. 如权利要求17所述的显示装置，其特征在于，所述显示装置包括一显示基板，所述显示基板包括所述背光源和一功能层；
    所述功能层设置在所述背光源的远离所述光源的表面上，并且所述功能层包括薄膜晶体管层或滤光层中的至少一层。
  19. 如权利要求18所述的显示装置，其特征在于，所述显示基板包括一偏光层，所述偏光层设置于所述功能层背离所述背光源的表面上。
PCT/CN2020/117694 2020-06-23 2020-09-25 背光源及显示装置 WO2021258570A1 (zh)

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