WO2022178937A1 - 背光结构和电子设备 - Google Patents

背光结构和电子设备 Download PDF

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Publication number
WO2022178937A1
WO2022178937A1 PCT/CN2021/083171 CN2021083171W WO2022178937A1 WO 2022178937 A1 WO2022178937 A1 WO 2022178937A1 CN 2021083171 W CN2021083171 W CN 2021083171W WO 2022178937 A1 WO2022178937 A1 WO 2022178937A1
Authority
WO
WIPO (PCT)
Prior art keywords
hole
light
backlight
backlight module
scattering
Prior art date
Application number
PCT/CN2021/083171
Other languages
English (en)
French (fr)
Inventor
罗光跃
Original Assignee
捷开通讯(深圳)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 捷开通讯(深圳)有限公司 filed Critical 捷开通讯(深圳)有限公司
Publication of WO2022178937A1 publication Critical patent/WO2022178937A1/zh
Priority to US18/236,973 priority Critical patent/US20240045266A1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • 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
    • G02B6/0051—Diffusing sheet or layer
    • 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
    • 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
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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
    • G02F1/13338—Input devices, e.g. touch panels
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02F1/133613—Direct backlight characterized by the sequence of light sources

Definitions

  • the present application relates to the field of display technology, and in particular, to a backlight structure and an electronic device.
  • the use of the camera solution under the LCD screen is a more feasible processing method, which does not increase the mechanical structure and can ensure a sufficiently high screen ratio.
  • the camera solution under the LCD screen it is generally necessary to adjust the backlight under the LCD screen
  • the module performs the hole-opening process. Since the display area needs to be free of black borders, the side walls of the hole area cannot be blocked by light-shielding materials, resulting in light leakage on the side walls, which in turn causes the camera below the hole to collect images. It will be disturbed by stray light caused by the corresponding light leakage.
  • the embodiments of the present application provide a backlight structure and an electronic device, which can improve the phenomenon of light leakage from the sidewall of the hole caused by the opening of the backlight module.
  • the embodiments of the present application provide a backlight structure, including:
  • a reflector located on the first backlight module in the longitudinal direction includes a horizontal part and a bending part connected to each other, and the horizontal part is provided with a first backlight set corresponding to the first backlight module. a through hole, the bending portion protrudes from the first through hole in a direction away from the first backlight module and forms a second through hole;
  • the second backlight module located on the horizontal part along the longitudinal direction, the second backlight module is provided with a third through hole and a light emitting surface, the bending part is located in the third through hole, and It is used for reflecting the light emitted from the side wall of the third through hole in the second backlight module to the light emitting surface.
  • the bending portion includes an inclined surface connected to the horizontal portion and a longitudinal surface connected to the inclined surface, and the angle between the inclined surface and the horizontal portion is in the shape of an angle. Obtuse angle.
  • the inclined surface is polished.
  • the included angle between the inclined surface and the horizontal portion includes 135°.
  • the second backlight module includes a reflective film located on the horizontal portion along the longitudinal direction, and a light guide plate and an optical film layer stacked on the reflective film in sequence.
  • the material of the light guide plate is polymethyl methacrylate.
  • the optical film layer includes a diffusion film and a brightness enhancement film that are sequentially stacked on the light guide plate.
  • the material of the diffusion film is polycarbonate.
  • the third through hole includes a first hole and a second hole that are communicated with each other, the first hole penetrates the optical film layer, and the second hole penetrates the light guide plate and the second hole.
  • the diameter of the first hole is smaller than that of the second hole, the bending portion is located in the second hole, and the diameter of the second hole is larger than the diameter of the second through hole.
  • the backlight structure further includes a light-scattering washer extending from the first hole into the second through hole, and the light-scattering washer is fixed with the bending portion, and is used for connecting the In the second backlight module, the light entering the light-scattering washer through the first hole and the light entering the light-scattering washer in the first backlight module are scattered.
  • the light-diffusing gasket includes a stepped surface, and the stepped surface is fixed to the bending portion by means of adhesive.
  • a groove is provided on the light-scattering washer, and a protrusion is provided on the bending portion, or, a protrusion is provided on the light-scattering washer, and a concave is provided on the bending portion.
  • a groove, and the protrusion is located in the groove, so as to clamp and fix the light-scattering gasket and the bending part.
  • the manufacturing material of the light-scattering gasket includes silica gel.
  • the thickness of the light-scattering gasket ranges from 0.2 mm to 1 mm.
  • the material for making the reflector includes iron.
  • the reflector and the first backlight module are fixedly connected by adhesive.
  • An embodiment of the present application further provides an electronic device, including a camera, a display screen, and the backlight structure according to any one of the foregoing embodiments, wherein the display screen and the camera are located on opposite sides of the backlight structure , and the camera is arranged corresponding to the first through hole.
  • the backlight structure and electronic device provided by the present application can reflect the light emitted from the second backlight module through the sidewall of the third through-hole to the light-emitting surface through the inclined surface of the bending portion on the reflector, so as to avoid passing through the third through-hole.
  • the light emitted from the side wall directly enters the first through hole and the second through hole, thereby improving the phenomenon of light leakage on the side wall of the opening of the backlight module.
  • the display area corresponding to the opening of the middle backlight module will not have obvious display black borders.
  • FIG. 1 is a partial cross-sectional structural schematic diagram of a backlight structure provided by an embodiment of the present application
  • FIG. 2 is a partial cross-sectional structural schematic diagram of another backlight structure provided by an embodiment of the present application.
  • FIG. 3 is a partial cross-sectional structural schematic diagram of an electronic device provided by an embodiment of the present application.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features.
  • a feature defined as “first” or “second” may expressly or implicitly include one or more of that feature.
  • plural means two or more.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.
  • FIG. 1 is a partial cross-sectional structural schematic diagram of a backlight structure provided by an embodiment of the present application.
  • the longitudinal direction may be the y direction
  • the horizontal direction may be the x direction.
  • the backlight structure 10 includes: a first backlight module 11 , a reflector 12 and a second backlight module 13 .
  • the reflector 12 is located on the first backlight module 11 along the y direction
  • the reflector 12 includes a horizontal portion 121 and a bending portion 122 connected to each other, and the horizontal portion 121 is provided with the first backlight module.
  • the set 10 corresponds to the first through hole 101
  • the bent portion 122 protrudes from the first through hole 101 in a direction away from the first backlight module 11 and forms a second through hole 102 .
  • the material of the reflector 12 can preferably be a light metal material such as iron, magnesium, etc.
  • the material of the reflector can also be a material combining metal and plastic, such as a reflector integrated with glue and iron, that is, the bending part. 122 is made of iron, and the horizontal part is made of plastic.
  • the reflector 12 is fixedly connected to the first backlight module 11 through adhesive.
  • the first backlight module 11 and the reflector 12 can be fixedly connected by using double-sided adhesive tape.
  • the second backlight module 13 is located on the horizontal portion 121 along the y direction, the second backlight module 13 is provided with a third through hole 103 and a light emitting surface 1331, and the bending portion 122 is located on the third through hole 1331.
  • the hole 103 is used for reflecting the light emitted from the second backlight module 13 through the sidewall of the third through hole 103 to the light emitting surface 1331 .
  • the light emitting surface 1331 provides backlight for other areas except the areas occupied by the first through holes 101 and the second through holes 102 .
  • the bending portion 122 includes an inclined surface 1221 connected to the horizontal portion 121 and a longitudinal surface 1222 connected to the inclined surface 1221 .
  • the angle between the inclined surface 1221 and the horizontal portion 121 is an obtuse angle.
  • the included angle between the inclined surface 1222 and the horizontal portion 121 is preferably an obtuse angle not less than 135 degrees, and may be 135 degrees, 145 degrees, etc., and the angle between the longitudinal surface 1222 and the inclined surface 1221 is The angle is equal to the included angle between the inclined surface 1221 and the horizontal portion 121 .
  • the inclined surface 1221 is beneficial to reflect the light emitted from the second backlight module 13 in the x-direction through the sidewall of the third through-hole 103 along the y-direction to the light-emitting surface 1331
  • the inclined surface 1221 is beneficial to directly reflect the light emitted from the second backlight module 13 in other directions through the sidewall of the third through hole 103 to the upper longitudinal surface 1222 of the bending portion 122 .
  • the longitudinal face 1222 is used to block the light directed thereto.
  • the light emitted from the sidewall of the third through hole 103 will first enter the light incident surface (not shown in the figure) of the second backlight module 13 after being reflected by the inclined surface 1221 , and then exit from the light exit surface. Shot in 1331.
  • the inclined surface 1221 is polished.
  • the material of the reflector 12 is preferably a light metal such as iron, magnesium, etc.
  • the metal surface itself since the metal surface itself has a certain luster, it can reflect light to a certain extent. Therefore, after polishing, the inclined surface 1221 The reflection capability is further enhanced, and the light emitted from the second backlight module 13 through the sidewall of the third through hole 103 can be better reflected to the light emitting surface 1331 .
  • the light emitted from the side wall of the third through hole 103 in the second backlight module 13 is reflected to the light emitting surface 1331 by the inclined surface 1221 on the bent portion 122 of the reflector 12,
  • the longitudinal surface 1222 blocks the light emitted to the longitudinal surface 1222, preventing the light emitted through the sidewall of the third through hole 103 from entering the area occupied by the first through hole 101 and the second through hole 102, thereby improving the side of the opening of the backlight module.
  • the phenomenon of light leakage occurs on the wall, and the inclined surface 1221 is also used to reflect the light emitted from the side wall of the third through hole 103 in the second backlight module 13 to the top of the longitudinal surface 1222, which improves the introduction of the reflector 12. Displays the phenomenon of black borders.
  • the embodiment of the present application provides another backlight structure, and further optimizes the backlight structure shown in FIG. 1 .
  • FIG. 2 is a partial cross-sectional structural schematic diagram of another backlight structure provided by an embodiment of the present application.
  • the backlight structure 20 includes: a first backlight module 21 , a reflector 22 , and a second backlight module 23 .
  • the structures and relative positional relationships of the first backlight module 21 , the reflector 22 and the second backlight module 23 in the second embodiment are the same as those corresponding to the first embodiment, except that Outside the first through hole and the second through hole (the position can be referred to for comparison with the structure in the first embodiment), other structures identical to those corresponding to those in the first embodiment are shown in FIG. 2 .
  • the preferred materials of some structures in the first embodiment are all applicable in the second embodiment.
  • the bending portion 222 in FIG. 2 The second through hole protrudes from the first through hole in the direction away from the first backlight module 21 and the depth of the second through hole is smaller than that of the second through hole in FIG. 1 .
  • the second backlight module 23 includes a reflective film 231 located on the horizontal portion 221 along the y-direction, and a light guide plate 232 and an optical film layer 233 stacked on the reflective film 231 in sequence.
  • the side of the light guide plate 232 is provided with light guide points (not shown in the figure).
  • the light guide point will spread the light to various angles, using various density and different sizes.
  • the light guide points can make the light guide plate 232 emit light uniformly.
  • the material of the light guide plate 232 is preferably polymethyl methacrylate, which has good optical performance and excellent light transmission performance.
  • the reflective film 231 is used to reflect the light leaking from the light guide plate 232 to the surface of the reflective film 231 back into the light guide plate 232, so as to reduce light loss and improve the use efficiency of light.
  • the optical film layer 233 includes a diffusion film (not shown in the figure) and a brightness enhancement film (not shown in the figure) that are sequentially stacked on the light guide plate 232 .
  • the diffusing film mainly plays the role of diffusing the light emitted from the light guide plate 232 in the second backlight module 23. When the light emitted from the light guide plate 232 is diffused by the diffusing film, it can become larger in area and better uniformity.
  • the secondary light source with stable chromaticity, in addition, the diffuser film also protects the optical material from damage.
  • the material of the diffusing film is preferably polycarbonate, which has strong diffusivity to light and is more resistant to moisture, which is beneficial to improve the service life.
  • the brightness enhancement film mainly plays the role of improving the luminous efficiency of the backlight module in the second backlight module 23.
  • the upper surface of the brightness enhancement film is uniformly and neatly covered with a layer of prism structure.
  • the special prism structure of the brightness enhancement film is used. , through the optical principles such as refraction, total reflection, light accumulation, etc., the light emitted from the diffuser film can be converged in the y direction, which is uniformly dispersed at all angles, and the brightness of the light-emitting surface 2331 can be improved without increasing the total luminous flux.
  • the inclined surface 2221 reflects the light emitted from the second backlight module 23 through the sidewall of the third through hole 203 to the light emitting surface 2331 on the optical film layer 233 , and the longitudinal surface 2222 is used to block the light emitted to the longitudinal surface 2222 of light.
  • the third through hole 203 includes a first hole 2031 and a second hole 2032 that communicate with each other, the first hole 2031 penetrates the optical film layer 233 , and the second hole 2032 penetrates the light guide plate 222 and the reflective film 231, the aperture of the first hole 2031 is smaller than the aperture of the second hole 2032, the bending portion 222 is located in the second hole 2032, and the aperture of the second hole 2032 is larger than the aperture of the second through hole .
  • the inclined surface 2221 reflects the light emitted through the sidewall of the second hole 2032 to the light exit surface 2331 on the optical film layer 233 .
  • the light emitted from the sidewall of the second hole 2032 will first enter the light incident surface (not shown in the figure) of the optical film layer 233 after being reflected by the inclined surface 2221 , and then exit from the light exit surface 2331 .
  • the backlight structure further includes a light-scattering washer 24 extending from the first hole 2031 to the second through hole, and the light-scattering washer 24 is fixed with the bending portion 222 for the second backlight In the module 23 , the light entering the diffusing gasket 24 through the first hole 2031 and the light entering the diffusing gasket 24 in the first backlight module 21 are scattered.
  • the function of the light-scattering gasket 24 is to scatter the light entering the light-scattering gasket 24 from the second backlight module 23 through the side wall of the first hole 2031 , and weaken the light from the second backlight module 23 .
  • the sidewall of a hole 2031 emits light to the area occupied by the second through hole, thereby improving the phenomenon of light leakage from the sidewall of the opening of the optical film layer 233; on the other hand, the first backlight module 21 is injected into the diffuser washer 24 is scattered, so that the light scattered from the astigmatic gasket 24 can cover the top of the longitudinal surface 2222 in the bent portion 222, that is, on the basis of improving the black edge phenomenon brought about by the bent portion 222, it can be further improved. Avoid uneven brightness near the opening.
  • the diffuser gasket 24 includes a stepped surface, and the stepped surface is fixed to the bent portion 222 by means of adhesive.
  • the stepped surface includes a longitudinal surface and a horizontal surface, and the stepped surface can be fixed to the bent portion 222 by applying glue on the longitudinal surface and/or the horizontal surface.
  • glue For the scattering effect of light, it is necessary to ensure that the adhesive has a certain light transmittance, so it is preferable to use gray or white double-sided adhesive tape to fix the stepped surface and the bent portion 222 .
  • the manufacturing material of the light-scattering gasket 24 includes silica gel.
  • the material of the astigmatism washer 24 is made of gray silica gel.
  • its thickness is preferably 0.2mm-1mm. In the preferred range, the light can be scattered well, so as to improve the light leakage phenomenon of the sidewall of the opening of the optical film layer 233 and avoid the display of black edges caused by the bent portion 222 .
  • the astigmatic gasket 24 is provided with a groove, and the bent portion is provided with a protrusion, or, the astigmatic gasket 24 is provided with a protrusion, and the bent portion 222 is provided with a groove, and the protrusion is located in the in the groove, so that the light-scattering gasket 24 and the bending portion 222 can be engaged and fixed.
  • the astigmatism effect of 24 can further enhance the astigmatism effect of the astigmatism gasket.
  • the light emitted from the side wall of the second hole 2032 in the second backlight module 23 is reflected to the light emitting surface 2331 by the inclined surface 2221 on the bending portion 222 of the reflector 22,
  • the surface 2222 blocks the light emitted to the longitudinal surface 2222 , the light entering the second backlight module 23 through the first hole 2031 and the light entering the diffusing washer 24 and the first backlight module 21 through the diffusing washer 24
  • the light entering the diffuser gasket 24 is scattered, so as to improve the phenomenon of light leakage on the side wall of the opening of the backlight module and the display black edge phenomenon caused by the introduction of the reflector, and further avoid the brightness near the opening. uneven phenomenon.
  • the present invention also provides an electronic device, which includes the backlight structure shown in the first or second embodiment above.
  • the backlight structure in the second embodiment is taken as an example to construct the structure provided by the embodiment of the present invention. electronic equipment.
  • FIG. 3 is a partial cross-sectional structural schematic diagram of an electronic device provided by an embodiment of the present application.
  • the electronic device 30 includes: a first backlight module 31 , a reflector 32 , a second backlight module 33 , a light-scattering gasket 34 , a camera 35 and a display screen 36 .
  • the structures and relative positions of the first backlight module 31 , the reflector 32 , the second backlight module 33 , and the astigmatism gasket 34 in this embodiment are the same as those in FIG. 2 .
  • the display screen 36 and the camera 35 are located on opposite sides of the backlight structure, and the camera 35 is disposed corresponding to the first through hole (not shown in the figure).
  • the display screen 36 may be disposed on the optical film layer 333 in the second backlight module 33, and the display screen 36 may include an upper polarizer, a color filter, a liquid crystal, a TFT (Thin Film Transistor, Thin film transistor) substrate and lower polarizer, used to display images, texts and other information.
  • the display screen 36 and the optical film layer 333 are fixedly connected by adhesive.
  • gray or white double-sided tape is preferably used as the adhesive to connect the display screen 36 and the optical film layer 333.
  • the display screen 36 is connected to the bending portion 322 through a light-scattering washer 34.
  • the light-scattering washer 34 can buffer the hard contact between the reflector 32 and the display screen 36 to prevent the display screen 36 from being damaged.
  • the close attachment of the screen 36 can further prevent light leakage from the gap between the bent portion 322 and the display screen 36 .
  • the camera 35 is disposed corresponding to the first through hole, and is used to collect image information through the first through hole.
  • the first backlight module 31 includes electrochromic glass.
  • the electrochromic glass can adjust the display mode to the light-guiding mode and the transparent mode according to the change of the driving voltage, and can realize the conversion between the atomized state and the transparent state.
  • the electronic device further includes a first light source (not shown in the figure) and a second light source (not shown in the figure), wherein the first light source is correspondingly disposed on both sides of the first backlight module 31 , when the first light source When turned on, the first backlight module 31 is adjusted to the light guide mode by setting the driving voltage of the electrochromic glass. At this time, the electrochromic glass in the atomized state actually acts as a light guide plate. The light incident from a light source is scattered, so that the first backlight module 31 becomes a surface light source with uniform light emission, so that the first backlight module 31 provides backlight for the area occupied by the first through hole.
  • the second light source is correspondingly arranged on one side of the light guide plate 332.
  • the backlight module 33 provides backlight for other areas except the area occupied by the first through hole.
  • the first light source and the second light source can be LEDs (Light Emitting Diode, light-emitting diode) lamp.
  • the first backlight module 31 is adjusted to the transparent mode by setting the driving voltage of the electrochromic glass, so that the camera 35 can pass through the first backlight module 31 and pass through the first backlight module 31. Consistently perforated to acquire image information.
  • the first light source and the second light source are turned on at the same time, and the first backlight module is set to the light guide mode.
  • the second light source when the second light source is turned on, the light emitted by the second light source is guided through the light guide plate 332 , and the second backlight module 33 passes through the second hole side through the inclined surface 3221 on the bent portion 322 of the reflector 32 .
  • the light emitted from the wall is reflected to the light-emitting surface, and the longitudinal surface 3222 of the bending portion 322 blocks the light emitted to the longitudinal surface 3222, thereby weakening the phenomenon of light leakage from the side wall of the opening of the backlight module;
  • the light from the second backlight module 33 entering the diffuser washer 34 through the first hole and the light from the first backlight module 31 entering the diffuser 34 are scattered to weaken the sidewall of the opening of the backlight module. Brings the display black edge phenomenon.
  • the first backlight module 31 When the first light source is turned on, by setting the driving voltage of the first backlight module, the first backlight module 31 is in the light guide mode, and provides backlight for the first through-hole region.
  • the first light source is turned off, the second light source is turned on, and the first backlight module is set to be in a transparent mode.
  • the first backlight module 31 when the first light source is turned off, by setting the driving voltage of the first backlight module 31, the first backlight module 31 is in a transparent mode, so that the camera 35 can pass through the first backlight module 31.
  • a backlight module 31 collects image information through the first through hole, and due to the function of the backlight structure, on the one hand, it can avoid the phenomenon of black borders appearing on the display screen 36 caused by the side wall of the opening of the backlight module, on the other hand It can prevent most of them from entering the first through hole area from the side wall of the opening of the backlight module, so that when the camera 35 collects image information through the first through hole, problems such as whitening and blurring of the image caused by light leakage interference can be avoided. Improves image quality.

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Abstract

本申请公开了一种背光结构和电子设备，背光结构包括第一背光模组、反光板和第二背光模组，反光板包括相互连接的水平部和弯折部，水平部上设有第一贯穿孔，弯折部形成第二贯穿孔；第二背光模组中设有第三贯穿孔和出光面，弯折部位于第三贯穿孔中，且用于将第二背光模组中通过第三贯穿孔侧壁射出的光线反射至出光面。

Description

背光结构和电子设备
本申请要求于2021年02月25日提交中国专利局、申请号为202110210964.9、发明名称为“背光结构和电子设备”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，尤其涉及一种背光结构和电子设备。
 背景技术
随着技术的发展以及人类审美的改变，人们对于移动终端的正面屏占比的要求越来越高。为了尽可能地提升屏占比，需要考虑如何巧妙地处理前置摄像头，其中，现有技术中常见的处理方式有机械弹出式摄像头、后摄翻转摄像头等方案，但是上述方式中额外的机械结构也会增加移动终端的重量，不便于人为使用。
目前，采用LCD屏下摄像头方案是较为可行的处理方式，既不会额外增加机械结构，又能保证足够高的屏占比，但采用LCD屏下摄像头方案时，一般需要对LCD屏下的背光模组进行开孔处理，由于需要实现显示区域无黑边，所以开孔区的侧壁无法用遮光材料进行遮挡，故导致侧壁会出现漏光的现象，进而导致开孔下方的摄像头在采集图像时会受到相应漏光带来的杂光干扰。
因此，现有技术存在缺陷，有待改进与发展。
 技术问题
本申请实施例提供一种背光结构和电子设备，能够改善背光模组因开孔导致孔侧壁出现漏光的现象。
 技术解决方案
本申请实施例提供了一种背光结构，包括：
第一背光模组；
沿纵向位于所述第一背光模组上的反光板，所述反光板包括相互连接的水平部和弯折部，所述水平部上设有与所述第一背光模组对应设置的第一贯穿孔，所述弯折部从所述第一贯穿孔处朝背离所述第一背光模组的方向凸伸且形成第二贯穿孔；
沿所述纵向位于所述水平部上的第二背光模组，所述第二背光模组中设有第三贯穿孔和出光面，所述弯折部位于所述第三贯穿孔中，且用于将所述第二背光模组中通过所述第三贯穿孔侧壁射出的光线反射至所述出光面。
在本申请一些实施例中，所述弯折部包括与所述水平部连接的倾斜面、以及与所述倾斜面连接的纵向面，所述倾斜面与所述水平部之间的夹角呈钝角。
在本申请一些实施例中，所述倾斜面经过抛光处理。
在本申请一些实施例中，所述倾斜面与所述水平部之间的夹角包括135°。
在本申请一些实施例中，所述第二背光模组包括沿所述纵向位于所述水平部上的反射膜、以及依次叠设在所述反射膜上的导光板和光学膜层。
在本申请一些实施例中，所述导光板的材质为聚甲基丙烯酸甲酯。
在本申请一些实施例中，所述光学膜层包括依次叠层设置在导光板上的扩散膜和增亮膜。
在本申请一些实施例中，所述扩散膜的材质为聚碳酸酯。
在本申请一些实施例中，所述第三贯穿孔包括相互连通的第一孔和第二孔，所述第一孔贯穿所述光学膜层，所述第二孔贯穿所述导光板和所述反射膜，所述第一孔的孔径小于所述第二孔的孔径，所述弯折部位于所述第二孔中，所述第二孔的孔径大于所述第二贯穿孔的孔径。
在本申请一些实施例中，所述背光结构还包括自所述第一孔延伸至所述第二贯穿孔内的散光垫圈，所述散光垫圈与所述弯折部固定，用于将所述第二背光模组中经由所述第一孔射入所述散光垫圈的光线、以及所述第一背光模组中射入所述散光垫圈的光线进行散射。
在本申请一些实施例中，所述散光垫圈包括台阶面，所述台阶面通过粘合方式与所述弯折部固定。
在本申请一些实施例中，所述散光垫圈上设有凹槽，所述弯折部上设有凸起，或者，所述散光垫圈上设有凸起，所述弯折部上设有凹槽，所述凸起位于所述凹槽中，以将所述散光垫圈与所述弯折部卡合固定。
在本申请一些实施例中，所述散光垫圈的制作材料包括硅胶。
在本申请一些实施例中，所述散光垫圈的厚度范围为0.2mm~1mm。
在本申请一些实施例中，所述反光板的制作材料包括铁。
在本申请一些实施例中，所述反光板与所述第一背光模组通过粘胶固定连接。
本申请实施例中还提供了一种电子设备，包括摄像头、显示屏、以及上述实施例中任一项所述的背光结构，所述显示屏和所述摄像头位于所述背光结构的相对两侧，且所述摄像头与所述第一贯穿孔对应设置。
 有益效果
本申请提供的背光结构和电子设备，能够通过反光板上的弯折部的倾斜面将第二背光模组中通过第三贯穿孔侧壁射出的光线反射至出光面，避免通过第三贯穿孔侧壁射出的光线直接进入第一贯穿孔和第二贯穿孔中，从而改善背光模组开孔的侧壁出现漏光的现象，并且通过倾斜面的反射作用，使得在引入反光板后，电子设备中背光模组开孔处对应的显示区域也不会出现明显的显示黑边。
 附图说明
图1是本申请实施例提供的背光结构的局部剖面结构示意图；
图2是本申请实施例提供的另一背光结构的局部剖面结构示意图；
图3是本申请实施例提供的电子设备的局部剖面结构示意图。
 本发明的实施方式
这里所公开的具体结构和功能细节仅仅是代表性的，并且是用于描述本申请的示例性实施例的目的。但是本申请可以通过许多替换形式来具体实现，并且不应当被解释成仅仅受限于这里所阐述的实施例。
在本申请的描述中，需要理解的是，术语“中心”、“横向”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
这里所使用的术语仅仅是为了描述具体实施例而不意图限制示例性实施例。除非上下文明确地另有所指，否则这里所使用的单数形式“一个”、“一项”还意图包括复数。还应当理解的是，这里所使用的术语“包括”和/或“包含”规定所陈述的特征、整数、步骤、操作、单元和/或组件的存在，而不排除存在或添加一个或更多其他特征、整数、步骤、操作、单元、组件和/或其组合。
下面结合附图和实施例对本申请作进一步说明，在图中结构相似的单元是以相同的标号表示。
图1是本申请实施例提供的背光结构的局部剖面结构示意图，在图1中纵向可以为y方向，水平可以为x方向。该背光结构10包括：第一背光模组11、反光板12和第二背光模组13。其中，该反光板12沿y方向位于该第一背光模组11上，且该反光板12包括相互连接的水平部121和弯折部122，该水平部121上设有与该第一背光模组10对应设置的第一贯穿孔101，该弯折部122从该第一贯穿孔101处朝背离第一背光模组11的方向凸伸且形成第二贯穿孔102。
具体地，该反光板12的材质可以优选为铁、镁等轻质金属材质，另外反光板的材质还可以选择金属与塑胶相结合的材料，例如胶铁一体化的反光板，即弯折部122采用铁材质，水平部采用塑胶材质。当反光板12采用以上材质时，既可以保证背光结构的轻量化，又能保证一定的机械强度。
该反光板12与第一背光模组11通过粘胶固定连接。当采用粘胶固定连接的方式时，可采用双面胶将第一背光模组11与反光板12固定连接。
其中，该第二背光模组13沿该y方向位于该水平部121上，该第二背光模组13中设有第三贯穿孔103和出光面1331，该弯折部122位于该第三贯穿孔103中，且用于将该第二背光模组13中通过该第三贯穿孔103侧壁射出的光线反射至该出光面1331。
具体地，该出光面1331为除该第一贯穿孔101和第二贯穿孔102所占区域外的其他区域提供背光。
其中，该弯折部122包括与该水平部121连接的倾斜面1221、以及与该倾斜面1221连接的纵向面1222，该倾斜面1221与该水平部121之间的夹角呈钝角。
具体地，该倾斜面1222与该水平部121之间的夹角优选为不小于135度的钝角，可以是135度、145度等角度，且该纵向面1222与该倾斜面1221之间的夹角等于该倾斜面1221与该水平部121之间的夹角。当该夹角设置为钝角时，一方面有利于该倾斜面1221将该第二背光模组13中通过该第三贯穿孔103侧壁沿x方向射出的光线沿y方向反射至该出光面1331，另一方面有利于该倾斜面1221将该第二背光模组13中通过该第三贯穿孔103侧壁沿其他方向射出的光线直接反射至该弯折部122上纵向面1222上方。该纵向面1222用于阻挡射向其的光线。
需要进一步说明的是，该第三贯穿孔103侧壁射出的光线经过倾斜面1221的反射会先进入该第二背光模组13的入光面（图中未示出），之后从该出光面1331中射出。
其中，该倾斜面1221经过抛光处理。具体地，当该反光板12的材质优选为铁、镁等轻质金属时，由于金属表面本身具有一定的光泽，可以对光线进行一定的反射，因此当经过抛光处理后，该倾斜面1221的反射能力得到进一步增强，能更好地将该第二背光模组13中通过该第三贯穿孔103侧壁射出的光线反射至该出光面1331。
在本申请中第一实施例中，通过反光板12中弯折部122上的倾斜面1221将第二背光模组13中通过第三贯穿孔103侧壁射出的光线反射至出光面1331，通过纵向面1222阻挡射向该纵向面1222的光线，避免通过第三贯穿孔103侧壁射出的光线进入第一贯穿孔101和第二贯穿孔102所占区域，改善了背光模组开孔的侧壁出现漏光的现象，并且该倾斜面1221还用于将第二背光模组13中通过第三贯穿孔103侧壁射出的光线反射至该纵向面1222上方，改善了引入反光板12后带来显示黑边的现象。
结合图1可知，当引入反光板12后，虽然改善了背光模组开孔的侧壁出现漏光的现象和引入反光板12后带来显示黑边的现象，但通过该倾斜面1221反射至该纵向面1222上方的光线十分有限，因此当该背光结构10实际应用到电子设备中时，虽然能改善黑边现象，但显示屏会出现显示亮度不均匀的现象。为了解决该问题，本申请实施例提供了另一背光结构，进一步对图1中所示的背光结构进行优化。
图2是本申请实施例提供的另一背光结构的局部剖面结构示意图。该背光结构20包括：第一背光模组21，反光板22，第二背光模组23。其中，在第二实施例中该第一背光模组21、反光板22以及第二背光模组23等结构和相对位置关系与在第一实施例中对应出现的结构及位置关系均相同，除第一贯穿孔、第二贯穿孔外（位置可参考对比第一实施例中的结构），其他与在第一实施例中对应出现的相同结构均在图2中示出。需要特别说明的是，在第二实施例中，在第一实施例中一些结构的优选材料均在第二实施例中适用，此外，如图2所示，图2中的该弯折部222从第一贯穿孔处朝背离第一背光模组21的方向凸伸且形成第二贯穿孔的孔深小于在图1中的第二贯穿孔的孔深。
其中，该第二背光模组23包括沿y方向位于水平部221上的反射膜231、以及依次叠设在该反射膜231上的导光板232和光学膜层233。
具体地，该导光板232的侧面设置有导光点（图中未示出），当光线到达导光点时，导光点会将光线往各个角度扩散，利用各种疏密、大小不一的导光点，可使得该导光板232均匀发光。该导光板232的材质优选为聚甲基丙烯酸甲酯，其光学性能较好，透光性能比较优越。
另外，该反射膜231用于将从导光板232漏到反射膜231表面上的光线反射回导光板232中，从而达到减少光损失，用来提高光线的使用效率。
其中，该光学膜层233包括依次叠层设置在导光板232上的扩散膜（图中未示出）和增亮膜（图中未示出）。该扩散膜在第二背光模组23中主要起到扩散从导光板232射出光线的作用，当导光板232中射出的光线经扩散膜扩散之后，能变成面积更大，均匀度较好，色度稳定的二次光源，此外，扩散膜还有保护光学材料免受损的作用。扩散膜的材料优选为聚碳酸酯，其对光线的扩散能力较强，且更加耐湿，有利于提高使用寿命。
该增亮膜在第二背光模组23中主要起到提高背光模组发光效率的作用，在增亮膜的上表面均匀而整齐的覆盖着一层棱镜结构，利用增亮膜特殊的棱镜结构，通过折射、全反射、光积累等光学原理，可以将从扩散膜射出的均匀地向各个角度发散的光线汇聚到y方向上，在不增加出射总光通量的情况下提高出光面2331的亮度。
具体地，倾斜面2221将该第二背光模组23中通过第三贯穿孔203侧壁射出的光线反射至光学膜层233上的出光面2331，纵向面2222用于阻挡射向该纵向面2222的光线。
其中，如图2所示，该第三贯穿孔203包括相互连通的第一孔2031和第二孔2032，该第一孔2031贯穿该光学膜层233，该第二孔2032贯穿该导光板222和该反射膜231，该第一孔2031的孔径小于该第二孔2032的孔径，该弯折部222位于该第二孔2032中，该第二孔2032的孔径大于该第二贯穿孔的孔径。
具体地，当该第一孔2031的孔径小于该第二孔2032的孔径时，倾斜面2221将通过第二孔2032侧壁射出的光线反射至光学膜层233上的出光面2331。
需要进一步说明的是，该第二孔2032侧壁射出的光线经过倾斜面2221的反射会先进入光学膜层233的入光面（图中未示出），之后从该出光面2331中射出。
其中，如图2所示，背光结构还包括自该第一孔2031延伸至该第二贯穿孔内的散光垫圈24，该散光垫圈24与该弯折部222固定，用于将该第二背光模组23中经由该第一孔2031射入该散光垫圈24的光线、以及该第一背光模组21中射入该散光垫圈24的光线进行散射。
具体地，如图2所示，该散光垫圈24的作用一方面在于将该第二背光模组23中经由该第一孔2031侧壁射入该散光垫圈24的光线进行散射，减弱从该第一孔2031侧壁射向第二贯穿孔所占区域的光线，从而改善光学膜层233开孔侧壁出现漏光的现象；另一方面在于将该第一背光模组21中射入该散光垫圈24的光线进行散射，从而从散光垫圈24散射出的光线能够覆盖在该弯折部222中纵向面2222的上方，即在已经改善弯折部222带来显示黑边现象的基础上，进一步可避免开孔附近出现亮度不均的现象。
其中，该散光垫圈24包括台阶面，该台阶面通过粘合方式与该弯折部222固定。
具体地，该台阶面包括纵向面和水平面，该台阶面可通过在其纵向面和/或水平面涂覆的粘胶与该弯折部222固定，本实施例中，为了不影响散光垫圈24对光线的散射效果，需要保证粘胶具有一定的透光性，故优选采用灰色或白色双面胶将该台阶面与该弯折部222固定。
其中，该散光垫圈24的制作材料包括硅胶。
具体地，为了保证散光垫圈对应的散光效果，优选散光垫圈24的制作材料为灰色硅胶材质，其中，当散光垫圈24的制作材料优选为硅胶时，其厚度优选为0.2mm-1mm，当其厚度在优选范围时，能较好地对光线进行散射，达到既能改善光学膜层233开孔侧壁漏光现象，又能避免弯折部222带来的显示黑边。
其中，该散光垫圈24上设有凹槽，该弯折部上设有凸起，或者，该散光垫圈24上设有凸起，该弯折部222上设有凹槽，该凸起位于该凹槽中，以将该散光垫圈24与该弯折部222卡合固定。
具体地，当该散光垫圈24与该弯折部222之间通过卡合固定时，由于没有引入粘胶将散光垫圈24与弯折部222之间进行固定，因此不存在粘胶层影响散光垫圈24的散光效果，可进一步提升散光垫圈的散光效果。
在本申请中第二实施例中，通过反光板22中弯折部222上的倾斜面2221将第二背光模组23中通过第二孔2032侧壁射出的光线反射至出光面2331，通过纵向面2222阻挡射向该纵向面2222的光线，通过散光垫圈24将该第二背光模组23中经由该第一孔2031射入该散光垫圈24的光线、以及该第一背光模组21中射入该散光垫圈24的光线进行散射，从而在既改善背光模组开孔的侧壁出现漏光的现象，又改善引入反光板带来的显示黑边现象的基础上，进一步避免开孔附近出现亮度不均的现象。
本发明还提供了一种电子设备，该电子设备包括以上第一实施例或第二实施例中出现的背光结构，现以第二实施例中的背光结构为例，构建本发明实施例所提供的电子设备。
图3是本申请实施例提供的电子设备的局部剖面结构示意图。该电子设备30包括：第一背光模组31、反光板32、第二背光模组33、散光垫圈34、摄像头35以及显示屏36。其中，在本实施例中该第一背光模组31、反光板32、第二背光模组33以及散光垫圈34等结构和相对位置关系与在图2中对应出现的结构及位置关系均相同。
其中，该显示屏36和该摄像头35位于该背光结构的相对两侧，且该摄像头35与第一贯穿孔（图中未示出）对应设置。
具体地，该显示屏36可以设置在第二背光模组33中光学膜层333上，该显示屏36可以包括依次层叠设置的上偏光片、彩色滤光片、液晶、TFT(Thin Film Transistor，薄膜晶体管)基板及下偏光片，用于显示图像、文本等信息。该显示屏36与光学膜层333之间通过粘胶固定连接。本实施例中，为了给该显示屏36提供足够的背光，需要保证粘胶具有一定的透光性，故优选灰色或白色双面胶作为粘胶连接显示屏36与光学膜层333。
进一步地，该显示屏36通过散光垫圈34与弯折部322连接，该散光垫圈34可缓冲反光板32与该显示屏36的硬接触，防止对显示屏36造成破坏，此外散光垫圈34与显示屏36的紧密贴附可进一步防止弯折部322与显示屏36之间的缝隙漏光。
该摄像头35对应第一贯穿孔设置，用于通过第一贯穿孔采集图像信息。
其中，该第一背光模组31包括电致变色玻璃。
具体地，该电致变色玻璃可根据驱动电压的变化调整显示模式为导光模式和透明模式，可实现雾化状态和透明状态的转换。
该电子设备还包括第一光源（图中未示出）和第二光源（图中未示出），其中，第一光源对应设置在该第一背光模组31的两侧，当第一光源开启时，通过设置电致变色玻璃的驱动电压将第一背光模组31调节至导光模式，此时，雾化状态的电致变色玻璃实际上起到的作用相当于导光板，即将从第一光源射入的光线进行散射，使得第一背光模组31成为均匀发光的面光源，从而使得第一背光模组31为第一贯穿孔所占区域提供背光。第二光源对应设置在该导光板332的一侧，当第二光源开启时，通过导光板332将第二光源发出的光线导出并在光学膜层333和反射膜331 的作用下，使得第二背光模组33为除第一贯穿孔所占区域外的其他区域提供背光。该第一光源和第二光源可以为LED(Light Emitting Diode，发光二极管)灯。
需要进一步说明的是，当第一光源关闭时，通过设置电致变色玻璃的驱动电压将第一背光模组31调节至透明模式，从而使得摄像头35可透过第一背光模组31并通过第一贯穿孔采集图像信息。
需要进一步说明的是，当电子设备的显示屏处于工作状态而摄像头处于休眠状态时，第一光源和第二光源同时开启，并设置第一背光模组为导光模式。
具体地，当第二光源开启时，通过导光板332将第二光源发出的光线导出，通过反光板32中弯折部322上的倾斜面3221将第二背光模组33中通过第二孔侧壁射出的光线反射至出光面，通过弯折部322的纵向面3222阻挡射向该纵向面3222的光线，从而实现弱化背光模组开孔的侧壁出现漏光的现象；通过散光垫圈34将该第二背光模组33中经由该第一孔射入该散光垫圈34的光线、以及该第一背光模组31中射入该散光垫圈34的光线进行散射，弱化背光模组开孔的侧壁带来的显示黑边现象。当第一光源开启时，通过设置第一背光模组的驱动电压，使得第一背光模组31处于导光模式，为第一贯穿孔区域提供背光。
当电子设备的显示屏和摄像头都处于工作状态时，第一光源关闭，第二光源开启，且设置第一背光模组为透明模式。
在本发明提供的电子设备的实施例中，当第一光源关闭时，通过设置第一背光模组31的驱动电压，使得第一背光模组31处于透明模式，从而使得摄像头35可透过第一背光模组31并通过第一贯穿孔采集图像信息，并且由于背光结构的作用，一方面能够避免背光模组开孔的侧壁导致在显示屏36上出现显示黑边的现象，另一方面能够避免绝大部分从背光模组开孔的侧壁进入第一贯穿孔区域，可使得摄像头35在通过第一贯穿孔采集图像信息时，避免受到漏光干扰引起的成像发白、模糊等问题，可提高成像质量。
综上，虽然本申请已以优选实施例揭露如上，但上述优选实施例并非用以限制本申请，对于本领域的普通技术人员，在不脱离本申请的精神和范围内，在具体实施方式及应用范围上均会有改变之处，因此本申请的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种背光结构，其包括：
    第一背光模组；
    沿纵向位于所述第一背光模组上的反光板，所述反光板包括相互连接的水平部和弯折部，所述水平部上设有与所述第一背光模组对应设置的第一贯穿孔，所述弯折部从所述第一贯穿孔处朝背离所述第一背光模组的方向凸伸且形成第二贯穿孔；
    沿所述纵向位于所述水平部上的第二背光模组，所述第二背光模组中设有第三贯穿孔和出光面，所述弯折部位于所述第三贯穿孔中，且用于将所述第二背光模组中通过所述第三贯穿孔侧壁射出的光线反射至所述出光面。
  2. 根据权利要求1所述的背光结构，其中，所述弯折部包括与所述水平部连接的倾斜面、以及与所述倾斜面连接的纵向面，所述倾斜面与所述水平部之间的夹角呈钝角。
  3. 根据权利要求2所述的背光结构，其中，所述倾斜面经过抛光处理。
  4. 根据权利要求2所述的背光结构，其中，所述倾斜面与所述水平部之间的夹角为135°。
  5. 根据权利要求1所述的背光结构，其中，所述第二背光模组包括沿所述纵向位于所述水平部上的反射膜、以及依次叠设在所述反射膜上的导光板和光学膜层。
  6. 根据权利要求5所述的背光结构，其中，所述导光板的材质为聚甲基丙烯酸甲酯。
  7. 根据权利要求5所述的背光结构，其中，所述光学膜层包括依次叠层设置在所述导光板上的扩散膜和增亮膜。
  8. 根据权利要求7所述的背光结构，其中，所述扩散膜的材质为聚碳酸酯。
  9. 根据权利要求5所述的背光结构，其中，所述第三贯穿孔包括相互连通的第一孔和第二孔，所述第一孔贯穿所述光学膜层，所述第二孔贯穿所述导光板和所述反射膜，所述第一孔的孔径小于所述第二孔的孔径，所述弯折部位于所述第二孔中，所述第二孔的孔径大于所述第二贯穿孔的孔径。
  10. 根据权利要求9所述的背光结构，其中，所述背光结构还包括自所述第一孔延伸至所述第二贯穿孔内的散光垫圈，所述散光垫圈与所述弯折部固定，用于将所述第二背光模组中经由所述第一孔射入所述散光垫圈的光线、以及所述第一背光模组中射入所述散光垫圈的光线进行散射。
  11. 根据权利要求10所述的背光结构，其中，所述散光垫圈包括台阶面，所述台阶面通过粘合方式与所述弯折部固定。
  12. 根据权利要求10所述的背光结构，其中，所述散光垫圈上设有凹槽，所述弯折部上设有凸起，或者，所述散光垫圈上设有凸起，所述弯折部上设有凹槽，所述凸起位于所述凹槽中，以将所述散光垫圈与所述弯折部卡合固定。
  13. 根据权利要求10所述的背光结构，其中，所述散光垫圈的制作材料包括硅胶。
  14. 根据权利要求10所述的背光结构，其中，所述散光垫圈的厚度范围为0.2mm~1mm。
  15. 根据权利要求1所述的背光结构，其中，所述反光板的制作材料包括铁。
  16. 根据权利要求1所述的背光结构，其中，所述反光板与所述第一背光模组通过粘胶固定连接。
  17. 一种电子设备，其包括摄像头、显示屏、以及如权利要求1所述的背光结构，所述显示屏和所述摄像头位于所述背光结构的相对两侧，且所述摄像头与所述第一贯穿孔对应设置。
  18. 根据权利要求17所述的电子设备，其中，所述第二背光模组包括沿所述纵向位于所述水平部上的反射膜、以及依次叠设在所述反射膜上的导光板和光学膜层。
  19. 根据权利要求18所述的电子设备，其中，所述第三贯穿孔包括相互连通的第一孔和第二孔，所述第一孔贯穿所述光学膜层，所述第二孔贯穿所述导光板和所述反射膜，所述第一孔的孔径小于所述第二孔的孔径，所述弯折部位于所述第二孔中，所述第二孔的孔径大于所述第二贯穿孔的孔径。
  20. 根据权利要求19所述的电子设备，其中，所述背光结构还包括自所述第一孔延伸至所述第二贯穿孔内的散光垫圈，所述散光垫圈与所述弯折部固定，用于将所述第二背光模组中经由所述第一孔射入所述散光垫圈的光线、以及所述第一背光模组中射入所述散光垫圈的光线进行散射。
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