WO2023102986A1 - 曲面背光模组及曲面显示装置 - Google Patents

曲面背光模组及曲面显示装置 Download PDF

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Publication number
WO2023102986A1
WO2023102986A1 PCT/CN2021/138495 CN2021138495W WO2023102986A1 WO 2023102986 A1 WO2023102986 A1 WO 2023102986A1 CN 2021138495 W CN2021138495 W CN 2021138495W WO 2023102986 A1 WO2023102986 A1 WO 2023102986A1
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WO
WIPO (PCT)
Prior art keywords
reflective cup
reflective
edge
curved surface
curved
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/138495
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English (en)
French (fr)
Inventor
肖士元
宋岁忙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Technology Co Ltd
Priority to US17/597,206 priority Critical patent/US11994770B2/en
Publication of WO2023102986A1 publication Critical patent/WO2023102986A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—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
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means

Definitions

  • the invention relates to the field of display technology, in particular to a curved surface backlight module and a curved surface display device.
  • Mini LEDs submillimeter light-emitting diodes
  • the characteristics of high contrast and flexibility and are increasingly used in the automotive field, and the requirements for on-board display modules are also getting higher and higher.
  • the vehicle-mounted display module includes a Mini LED backlight chip, a substrate, and a curved display panel.
  • the Mini LED backlight chip and the substrate are fixed to form a Mini LED surface light source, which is used to provide a surface light source for the curved display panel.
  • the closer to the edge of the curved display panel the greater the brightness attenuation, which affects the user experience and reduces user satisfaction.
  • Embodiments of the present invention provide a curved surface backlight module and a curved display device to solve the technical problem of serious brightness attenuation at the edge of the curved surface display module in the existing curved surface display module.
  • an embodiment of the present invention provides a curved surface backlight module, the curved surface backlight module includes a central partition and edge partitions located around the central partition, the curved surface backlight module includes:
  • a substrate including a first surface
  • a plurality of light-emitting units distributed in an array are arranged on the first surface, and the light-emitting units include a reflective cup and an LED chip located in the reflective cup; wherein,
  • the plurality of reflective cups include a first reflective cup located in the edge partition and a second reflective cup located in the central partition;
  • the first reflective cup is asymmetrical with respect to the normal line of the first curved surface corresponding to the position of the first reflective cup.
  • the reflective cup includes an opening disposed on a side away from the substrate, and the corresponding LED chip is located in the opening, and the opening includes a side wall extending from the central partition toward the The direction of the edge partition, the side wall of the first reflective cup is asymmetrical with respect to the normal line of the first curved surface corresponding to the position of the first reflective cup.
  • the sidewall of the second reflective cup is symmetrical with respect to the normal line of the second curved surface corresponding to the position of the second reflective cup.
  • the angle formed by the side wall of the second reflective cup relative to the normal of the second curved surface is ⁇
  • the side wall of the first reflective cup includes a The first side wall and the second side wall far away from the central partition, the first included angle formed by the first side wall relative to the normal of the first curved surface is ⁇ , and the second side wall is relative to the The second included angle formed by the normal line of the first curved surface is ⁇ , wherein, 0 ⁇ 90°, 90°> ⁇ > ⁇ >0.
  • the first surface normal corresponding to the position of any one of the first reflective cups corresponds to the position of a second reflective cup located in the center of the central partition.
  • the distance between adjacent second reflective cups located in the central zone is greater than the distance between adjacent first reflective cups located in the edge zone.
  • the distance between adjacent first reflective cups of the edge partition gradually decreases from the central partition toward the edge partition.
  • the edge partition includes at least two sub-edge partitions surrounding the central partition in sequence, and from the central partition toward the direction of the edge partition, at least two of the sub-edge partitions The distance between adjacent first reflective cups decreases gradually, and the distance between adjacent first reflective cups in the same sub-edge section is the same.
  • the first included angle of the edge partition gradually decreases, and the second included angle gradually increases from the central partition toward the edge partition.
  • the distances between adjacent second reflective cups of the central partition are the same.
  • the included angle between the tangent of the position of any one of the first reflective cups and the tangent of the position of a second reflective cup located in the center of the central partition is greater than or Equal to 30° and less than 90°.
  • the luminous intensity of the first reflective cup is greater than the luminous intensity of the second reflective cup.
  • an embodiment of the present invention also provides a curved display device, including the curved backlight module in the above embodiment, and a curved display panel disposed on the light emitting surface side of the backlight module, the curved backlight module
  • the bending direction of the group is the same as that of the curved display panel.
  • Embodiments of the present invention provide a curved backlight module and a curved display device.
  • the curved backlight module includes a central partition and an edge partition located around the central partition.
  • the curved backlight module includes a substrate having a first surface, and a A plurality of light-emitting units, the light-emitting unit includes a reflective cup and an LED chip disposed in the reflective cup, the plurality of reflective cups include a first reflective cup located in the edge partition and a second reflective cup located in the central partition, the first The reflection cup is asymmetrical with respect to the normal line of the first curved surface corresponding to the position of the first reflection cup.
  • the maximum brightness center of the reflective cup of the edge partition tends to emit light parallel to the user's viewing direction, which can improve the brightness of the edge of the display device attenuation.
  • FIG. 1 is a schematic structural view of a curved surface backlight module provided by an embodiment of the present invention
  • Fig. 2A is a structural schematic diagram of a symmetrical structure of the first reflecting cup in the prior art
  • Fig. 2B is a schematic structural diagram of the asymmetric structure of the first reflection cup provided by the embodiment of the present invention.
  • Fig. 3 is a schematic structural diagram of a second reflective cup and a first reflective cup provided by an embodiment of the present invention
  • Fig. 4 is another structural schematic diagram of the second reflective cup and the first reflective cup provided by the embodiment of the present invention.
  • Fig. 5 is a schematic diagram of the three-dimensional structure of the second reflection cup provided by the embodiment of the present invention.
  • Fig. 6 is a schematic plan view of the distribution of multiple reflection cups provided by the embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a curved display device provided by an embodiment of the present invention.
  • the embodiment of the present invention provides a curved surface backlight module 10.
  • the curved surface backlight module 10 includes a substrate 11 and a plurality of light emitting units 12 distributed in an array.
  • the substrate 11 includes a first The surface 111, the light emitting unit 12 is disposed on the first surface 111, and the first surface 111 includes a curved arc surface.
  • the light emitting unit 12 includes a reflective cup 121, an LED chip 122 located in the reflective cup 121, a drive circuit (not shown in the figure) is provided on the substrate 11, and the drive circuit and the LED chip 122 to drive the LED chip 122 to emit light.
  • the LED chip 122 may be a Mini LED chip.
  • the reflective cup 121 includes an opening on a side facing away from the substrate 11 , and the corresponding LED chip is located in the opening, that is, the light emitting direction of the reflective cup 121 is away from the substrate 11 .
  • the side wall of the opening is formed by the inner wall of the reflective cup 121.
  • the side wall can be curved or straight, and the opening area of the opening along the direction away from the substrate 11 gradually increases. big.
  • the light emitting unit 12 further includes an encapsulation layer 123 located in the opening of the reflective cup 121 , the encapsulation layer 123 fills the opening of the reflective cup 121 , wherein phosphor powder is doped in the encapsulation layer 123 .
  • the fluorescent powder can be a yellow fluorescent powder, which emits a white light source by complementary colors of blue light and yellow light, and the fluorescent powder can also include red fluorescent powder and green fluorescent powder at the same time, The blue light emitted by the chip and the red light and green light emitted by the phosphor are mixed to produce a white light source.
  • the LED chip 122 can also be an ultraviolet LED chip, and the phosphor can include red phosphor, green phosphor and blue phosphor at the same time, and the near-ultraviolet light emitted by the ultraviolet LED chip excites red and green phosphors. , blue three primary color phosphors and finally emit white light.
  • the reflective cups in the existing backlight modules adopt a symmetrical design.
  • the backlight module is also designed to be curved accordingly.
  • a symmetrically designed reflective cup is placed on a curved substrate, the light emitted by the LED chips tends to converge toward the center of the display panel after being reflected by the reflective cup, resulting in a more obvious problem of brightness attenuation as it gets closer to the edge of the curved display panel.
  • the embodiment of the present invention solves the above-mentioned defects by improving the reflective cup structure in the backlight module.
  • the curved surface backlight module 10 includes a central zone CA and an edge zone EA located around the central zone CA, and the plurality of reflective cups 121 include a second reflective cup 121B and a second reflective cup 121B located in the central zone CA.
  • the opening shape of the second reflecting cup 121B may be a circle or other regular polygons, and the opening shape of the first reflecting cup 121A may be a closed irregular arc or other irregular shapes.
  • the inner side wall of the second reflective cup 121B (hereinafter referred to as the side wall) has a certain slope (greater than 0° and less than 90°) relative to its bottom wall, and the angle between the side wall and the bottom wall on either side is The sizes are all the same, and the side wall of the first reflective cup 121A also has a certain slope relative to its bottom wall, but the included angles formed by the side wall and the bottom wall at different positions are different.
  • the LED chip 122 is located at the center of the bottom wall of the corresponding reflective cup 121 , and in other embodiments, there may be a distance between the LED chip 122 and the bottom wall of the corresponding reflective cup 121 .
  • each reflective cup 121 is arranged on the curved substrate 11, the whole formed by a plurality of reflective cups 121 arranged in an arc will have a light-gathering effect, and the reflective cup 121 on the edge (the first reflective cup 121A) the light rays at the center of the maximum brightness are parallel to the surface normal there, causing the light reflected by the reflective cup 121 on the edge to converge towards the center of the arc.
  • the same symmetrical structure of 121A and the second reflective cup 121B of the central section CA will cause the light emitted from the first reflective cup 121A around the edge of the curved backlight module 10 to converge towards the center of the arc.
  • the first reflective cup 121A is arranged as an asymmetric structure, and the first reflective cup 121A and the LED chip 122 are both arranged on the curved substrate 11, so that the light at the center of the maximum brightness of the first reflective cup 121A can be Parallel to the viewing direction of the user, the brightness attenuation of the edge partition EA is improved, as shown in FIG. 2B .
  • the second reflective cup 121B is symmetrical to the second surface normal L2 corresponding to the position of the second reflective cup 121B
  • the first reflective cup 121A is symmetrical to the second curved surface normal line L2 corresponding to the position of the second reflective cup 121B.
  • the first curved surface normal L1 corresponding to the position of the first reflective cup 121A is asymmetrical, so that the light emitted by the reflective cup 121 in the central subregion CA still converges toward the center of the arc, while the light emitted by the reflective cup 121 in the edge subregion EA
  • the maximum luminance center of EA is as parallel as possible to the viewing direction of the user, so as to reduce the luminance attenuation degree of the edge partition EA.
  • the surface normal of the reflective cup 121 mentioned in the embodiment of the present invention refers to the point where the reflective cup 121 is located (because the size of the light-emitting unit 12 is very small, between 50 and 200 microns, macroscopically, it can be
  • the reflective cup 121 of the light emitting unit 12 is regarded as a perpendicular line to the tangent plane corresponding to the point), and the perpendicular line passes through the point.
  • the side wall of the first reflective cup 121A is not equal to the first surface normal L1 corresponding to the position of the first reflective cup 121A. symmetry.
  • the sidewall of the second reflective cup 121B is symmetrical with respect to the normal line L2 of the second curved surface corresponding to the position of the second reflective cup 121B.
  • the substrate 11 only includes one curvature, that is, the normal direction of the curved surface of the substrate 11 is the corresponding radial direction at this location.
  • the substrate 11 may include multiple different curvatures.
  • the angle formed by the side wall of the second reflective cup 121B relative to the normal line L2 of the second surface is ⁇
  • the first reflective cup 121A includes The first side wall 1211 of the first side wall 1211 and the second side wall 1212 away from the central partition, the first included angle formed by the first side wall 1211 with respect to the normal line L1 of the first surface is ⁇ , the second side The second included angle formed by the wall 1212 relative to the normal line L1 of the first curved surface is ⁇ , where 0 ⁇ 90°, 90°> ⁇ > ⁇ >0.
  • the light reflected by the LED chip 122 located in the first reflective cup 121A on its left side wall (near the central partition CA side) tends to be emitted parallel to the viewing direction of the human eye (as shown vertically upward), and on the right side
  • the light reflected on the wall (the side away from the central subregion CA) also tends to exit parallel to the viewing direction of human eyes, thereby further improving the brightness attenuation of the edge subregion EA.
  • the included angle between the reflective cup 121 and the corresponding curved surface normal mentioned in this embodiment refers to the angle between the slope and the curved surface normal.
  • the second reflective cup 121B is in the shape of a cylinder with a wide top and a narrow bottom, and the bottom wall of the second reflective cup 121B is circular in shape, so The shape of the opening 1201 of the second reflecting cup 121B is circular, and the area of the opening 1201 of the second reflecting cup 121B gradually increases along the direction away from the bottom wall, and the side wall of the second reflecting cup 121B is a curved surface. shape.
  • the first surface normal L1 corresponding to the position of any one of the first reflective cups 121A is connected to a first surface normal L1 located at the center of the central section CA.
  • the light at the center of maximum brightness of the second reflective cup 121B in the center of the central partition CA can be considered to be parallel to the viewing direction of the user, when the substrate 11 bends from the center to both sides, if the original second reflective cup 121B is kept
  • the symmetrical design of the reflective cup will cause the light at the center of maximum brightness of the reflective cup at the curved position to deviate from the viewing direction of the user at an angle of ⁇ .
  • the first reflective cup 121A is designed as an asymmetric design, and the first The first included angle ⁇ of the first side wall 1211 of the reflective cup 121A decreases by ⁇ relative to the included angle ⁇ , and the included angle ⁇ of the second side wall 1212 increases by ⁇ relative to the included angle ⁇ , so that the first reflective cup 121A finally emerges The light tends to be in the user's viewing direction.
  • the corresponding bending radius of the substrate 11 is R, and the horizontal distance X where any one of the first reflective cups 121A is shifted relative to the second reflective cup 121B in the center of the central section CA is RSin ⁇ .
  • Display screens of different sizes have different degrees of attenuation at the edge, and have different requirements for the brightness of the display screen.
  • the embodiment of the present invention takes small and medium-sized display screens (such as mobile phones and tablets) as examples.
  • the asymmetric design of the reflective cup 121 it can be The asymmetrical design starts from the position where the substrate 11 is bent 30 degrees relative to the horizontal plane (the horizontal plane in the direction shown in the figure). In other embodiments, the asymmetric design of the reflective cup 121 may also start from other positions than the center of the substrate 11 .
  • the tangent line L4 between the position of any one of the first reflective cups 121A and the position of one of the second reflective cups 121B located in the center of the central section CA are located.
  • the angle ⁇ between the tangent lines L3 of the positions is greater than or equal to 30° and less than 90°.
  • the distance S1 between the adjacent second reflective cups 121B located in the central subarea CA is greater than that between the adjacent second reflective cups 121B located in the edge subarea EA.
  • a distance S2 between the reflecting cups 121A By reducing the spacing S2 between the first reflective cups 121A of the edge subregion EA, that is, increasing the distribution density of the first reflective cups 121A of the edge subregion EA, the irradiation intensity of the edge subregion EA of the curved surface backlight module 10 can be increased, and the edge Brightness falloff for partition EA.
  • the distance S1 between adjacent second reflective cups 121B of the central subregion CA can be set to be the same. Since the brightness attenuation is more obvious closer to the edge, in a specific embodiment, from the central subregion CA to the direction of the edge subregion EA, the adjacent first reflectors in the edge subregion EA The spacing S2 between the cups 121A may gradually decrease. The gradually decreasing variation trend of the spacing S2 may be linear, or gradient, or curvilinear.
  • the first included angle ⁇ of the edge area EA gradually decreases, and the second included angle ⁇ gradually increases, so that the closer The position of the edge, the more parallel the direction of the light emitted by the first reflective cup 121A is to the viewing direction of human eyes.
  • the edge area EA can be further divided, and the edge area EA can include multiple (at least two) sub-edge areas surrounding the central area CA in turn, from The central sub-area CA faces the direction of the edge sub-area EA, the distance S2 between adjacent first reflective cups 121A in multiple (at least two) sub-edge sub-areas gradually decreases, and the same sub-area The distance S2 between adjacent first reflective cups 121A in the edge section is the same.
  • the luminous intensity of the first reflective cup 121A may be greater than the luminous intensity of the second reflective cup 121B, so as to compensate for the brightness attenuation of the edge area EA.
  • an embodiment of the present invention further provides a curved display device 100
  • the curved display device 100 includes the curved backlight module 10 in any of the above embodiments, and a curved display panel 30 .
  • the curved display panel 30 is disposed on one side of the light emitting surface of the curved backlight module 10
  • the curved backlight module 10 is a direct type backlight module, which provides a whole-surface light source for the curved display panel 30 .
  • the bending direction of the curved backlight module 10 is the same as that of the curved display panel 30.
  • the curved display panel 30 is an inwardly curved display panel, that is, the curved display panel 30 faces toward the curved surface.
  • the display surfaces at both ends of the display panel 30 tend to be curved in opposite directions.
  • the curved display panel 30 may also be an outwardly curved display panel, that is, the curved display panel 30 is curved toward a direction in which the display surfaces at both ends of the curved display panel 30 tend to be away from each other.
  • the curved display panel 30 includes a central display area and an edge display area located around the central display area, the central zone CA of the curved backlight module 10 corresponds to the central display area of the curved display panel 30, and the curved backlight
  • the edge area EA of the module 10 corresponds to the edge display area of the curved display panel 30 .
  • the curved display panel 30 can be a liquid crystal display panel, and the curved display panel 30 includes a first substrate 32 and a second substrate 33 that are oppositely arranged, and are sandwiched between the first substrate 32 and the second substrate 33 The liquid crystal layer, the first polarizer 31 arranged outside the first substrate 32 , and the second polarizer 34 arranged outside the second substrate 33 .
  • an optical film 20 is provided between the curved display panel 30 and the curved backlight module, and the optical film 20 may include at least one of a brightness enhancement film and a diffusion sheet.
  • the curved display device 100 provided by the embodiment of the present invention can be applied in the field of vehicle display, such as a vehicle display screen, and can also be used in other curved display fields.
  • the embodiment of the present invention provides a curved backlight module 10 and a curved display device 100.
  • the curved backlight module 10 includes a central partition CA and an edge partition EA located around the central partition CA.
  • the curved backlight module 10 includes a first The substrate 11 of the surface 111, and a plurality of light emitting units 12 arranged on the first surface 111, the light emitting unit 12 includes a reflective cup 121 and an LED chip 122 arranged in the reflective cup 121, and the plurality of reflective cups 121 include a The second reflective cup 121B of CA and the first reflective cup 121A located in the edge zone EA, the first reflective cup 121A is asymmetrical with respect to the first surface normal L1 corresponding to the position of the first reflective cup 121A.
  • the first reflective cup 121A of the edge subregion EA By designing the first reflective cup 121A of the edge subregion EA to be an asymmetric structure with respect to its corresponding surface normal, it can be improved that the center of maximum brightness of the first reflective cup 121A of the edge subregion CA tends to emit light parallel to the viewing direction of the user, improving Luminance falloff at the edges of the display device.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种曲面背光模组(10)及曲面显示装置(100)，曲面背光模组(10)包括多个发光单元(12)，发光单元(12)包括反射杯(121)，多个反射杯(121)包括位于边缘分区(EA)的第一反射杯(121A)和位于中心分区(CA)的第二反射杯(121B)，第一反射杯(121A)相对于其所处位置对应的第一曲面法线(L1)非对称，可使边缘分区(EA)的第一反射杯(121A)的最大亮度中心趋向于平行用户观察方向出光，改善显示装置边缘的亮度衰减。

Description

曲面背光模组及曲面显示装置 技术领域
本发明涉及显示技术领域，尤其涉及一种曲面背光模组及曲面显示装置。
 背景技术
随着显示面板技术和汽车技术的发展，由于Mini LED（次毫米发光二极管）具有对比度高、可弯曲的特性，被越来越多地应用于汽车领域，随之对于车载显示模组的要求也越来越高。
现阶段车载显示模组包括Mini LED背光芯片、基板以及曲面显示面板等，Mini LED背光芯片与基板固定形成Mini LED面光源，用以为曲面显示面板提供面光源。现有的车载显示模组中，越靠近曲面显示面板边缘的位置，亮度衰减越多，从而影响使用感受，降低用户满意度。
 技术问题
本发明实施例提供一种曲面背光模组及曲面显示装置，以解决现有的曲面显示模组中，曲面显示模组边缘的亮度衰减较为严重的技术问题。
 技术解决方案
为解决上述问题，本发明提供的技术方案如下：
一方面，本发明实施例提供一种曲面背光模组，所述曲面背光模组包括中心分区以及位于所述中心分区周边的边缘分区，所述曲面背光模组包括：
基板，包括第一表面；以及
阵列分布的多个发光单元，设置于所述第一表面，所述发光单元包括反射杯和位于所述反射杯内的LED芯片；其中，
多个所述反射杯包括位于所述边缘分区的第一反射杯和位于所述中心分区的第二反射杯；
所述第一反射杯相对于该所述第一反射杯所处位置对应的第一曲面法线非对称。
在本发明的一些实施例中，所述反射杯包括背离所述基板一侧设置的开口，对应的所述LED芯片位于所述开口内，所述开口包括侧壁，自所述中心分区朝向所述边缘分区的方向，所述第一反射杯的侧壁相对于该所述第一反射杯所处位置对应的第一曲面法线非对称。
在本发明的一些实施例中，所述第二反射杯的侧壁相对于该所述第二反射杯所处位置对应的第二曲面法线对称。
在本发明的一些实施例中，所述第二反射杯的侧壁相对于所述第二曲面法线所呈夹角为α，所述第一反射杯的侧壁包括靠近所述中心分区的第一侧壁和远离所述中心分区的第二侧壁，所述第一侧壁相对于所述第一曲面法线所呈第一夹角为β，所述第二侧壁相对于所述第一曲面法线所呈第二夹角为γ，其中，0＜β＜α＜90°，90°＞γ＞α＞0。
在本发明的一些实施例中，任一所述第一反射杯所处位置对应的所述第一曲面法线与位于所述中心分区的中心的一所述第二反射杯所处位置对应的所述第二曲面法线之间所呈的夹角为ω，其中，β=α-ω，γ=α+ω。
在本发明的一些实施例中，位于所述中心分区的相邻所述第二反射杯之间的间距大于位于所述边缘分区的相邻所述第一反射杯之间的间距。
在本发明的一些实施例中，自所述中心分区朝向所述边缘分区的方向，所述边缘分区的相邻所述第一反射杯之间的间距逐渐减小。
在本发明的一些实施例中，所述边缘分区包括至少两个依次环绕所述中心分区的子边缘分区，自所述中心分区朝向所述边缘分区的方向，至少两所述子边缘分区内的相邻所述第一反射杯之间的间距逐渐减小，同一所述子边缘分区内的相邻所述第一反射杯之间的间距相同。
在本发明的一些实施例中，自所述中心分区朝向所述边缘分区的方向，所述边缘分区的所述第一夹角逐渐减小，所述第二夹角逐渐增大。
在本发明的一些实施例中，所述中心分区的相邻的所述第二反射杯之间的间距相同。
在本发明的一些实施例中，任一所述第一反射杯所处位置的切线与位于所述中心分区的中心的一所述第二反射杯所处位置的切线之间的夹角大于或等于30°且小于90°。
在本发明的一些实施例中，所述第一反射杯的发光强度大于所述第二反射杯的发光强度。
另一方面，本发明实施例还提供一种曲面显示装置，包括上述实施例中的曲面背光模组，以及设于所述背光模组的出光面一侧的曲面显示面板，所述曲面背光模组的弯曲方向与所述曲面显示面板的弯曲方向相同。
 有益效果
本发明实施例提供一种曲面背光模组及曲面显示装置，曲面背光模组包括中心分区以及位于中心分区周边的边缘分区，曲面背光模组包括具有第一表面的基板，以及设于第一表面的多个发光单元，发光单元包括反射杯和设于反射杯内的LED芯片，多个反射杯包括位于所述边缘分区的第一反射杯和位于所述中心分区的第二反射杯，第一反射杯相对于该第一反射杯所处位置对应的第一曲面法线非对称。通过将边缘分区的第一反射杯相对于其对应的曲面法线方向设计为非对称结构，可提高边缘分区的反射杯的最大亮度中心趋向于平行用户观察方向出光，能够改善显示装置边缘的亮度衰减。
 附图说明
图1为本发明实施例提供的曲面背光模组的结构示意图；
图2A为现有技术的第一反射杯为对称结构的结构示意图；
图2B为本发明实施例提供的第一反射杯为非对称结构的结构示意图；
图3为本发明实施例提供的第二反射杯和第一反射杯的结构示意图；
图4为本发明实施例提供的第二反射杯和第一反射杯的另一结构示意图；
图5为本发明实施例提供的第二反射杯的立体结构是示意图；
图6为本发明实施例提供的多个反射杯分布的平面示意图；
图7为本发明实施例提供的曲面显示装置的结构示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，需要理解的是，术语“中心”、“上”、“下”、“水平”、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所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
下文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本申请。此外，本申请可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。
第一方面，如图1所示，本发明实施例提供一种曲面背光模组10，所述曲面背光模组10包括基板11和阵列分布的多个发光单元12，所述基板11包括第一表面111，所述发光单元12设置于所述第一表面111，所述第一表面111包括弯曲弧面。其中，所述发光单元12包括反射杯121、位于所述反射杯121内的LED芯片122，所述基板11上设有驱动电路（图中未示出），所述驱动电路与所述LED芯片122电连接，以驱动所述LED芯片122发光。在本发明的实施例中，所述LED芯片122可为Mini LED芯片。
所述反射杯121包括背离所述基板11一侧设置的开口，对应的所述LED芯片位于所述开口内，即所述反射杯121的出光方向背离所述基板11。所述开口的侧壁由所述反射杯121的内壁构成，所述侧壁可为曲面状，也可为平直的斜面状，所述开口沿背离所述基板11的方向的开口面积逐渐增大。所述发光单元12还包括位于所述反射杯121的开口内的封装层123，所述封装层123填充满所述反射杯121的开口，其中，所述封装层123内掺杂有荧光粉。当所述LED芯片为蓝光LED芯片时，所述荧光粉可为黄色荧光粉，由蓝光和黄光两色互补而发出白色光源，所述荧光粉还可同时包括红色荧光粉和绿色荧光粉，由芯片发出的蓝光和荧光粉发出的红光、绿光三色混合而发出白色光源。在有些实施例中，所述LED芯片122还可为紫外LED芯片，所述荧光粉可同时包括红色荧光粉、绿色荧光粉和蓝色荧光粉，紫外LED芯片发出的近紫外光激发红、绿、蓝三基色荧光粉而最终发出白光。
一般现有的背光模组中的反射杯均采用对称设计，当背光模组应用于曲面显示面板中时，相应地，背光模组也设计成曲面。将对称设计的反射杯置于曲面的基板上时，LED芯片发出的光源经过反射杯反射后具有向显示面板中心汇聚的倾向，导致越靠近曲面显示面板的边缘，亮度衰减的问题愈发明显。本发明实施例通过对背光模组中的反射杯结构进行改进，以解决上述缺陷。
如图1所示，曲面背光模组10包括中心分区CA和以及位于所述中心分区CA周边的边缘分区EA，多个所述反射杯121包括位于所述中心分区CA的第二反射杯121B和位于所述边缘分区EA的第一反射杯121A，其中，所述第二反射杯121B为对称结构，所述第一反射杯121A为非对称结构。
在本发明的实施例中，所述第二反射杯121B的开口形状可为圆形或其他正多边形，所述第一反射杯121A的开口形状可为封闭的不规则弧形或其他不规则图形。所述第二反射杯121B的内侧壁（以下简称侧壁）相对于其底壁具有一定的坡度（大于0°且小于90°），且任一侧的侧壁与底壁所成的夹角大小均相同，所述第一反射杯121A的侧壁相对于其底壁同样也具有一定的坡度，但不同位置的侧壁与底壁所成的夹角大小不同。
在本发明实施例中，所述LED芯片122位于对应的反射杯121的底壁的中心，在其他实施例中，所述LED芯片122与对应的反射杯121的底壁之间可具有间距。
如图2A所示，由于各个反射杯121均是设置在弯曲的基板11上，呈弧形排列的多个反射杯121形成的整体会具有聚光作用，边缘的反射杯121（第一反射杯121A）的最大亮度中心的光线平行于该处的曲面法线出射，导致边缘的反射杯121反射出的光线会偏向于弧形的圆心汇聚，因此若保持周边的边缘分区EA的第一反射杯121A与中心分区CA的第二反射杯121B相同的对称结构，会导致曲面背光模组10四周边缘的第一反射杯121A出射的光线均偏向弧形的圆心汇聚。而将第一反射杯121A设置为非对称结构，再结合第一反射杯121A和LED芯片122均设置在弯曲的基板11上，因此可使得所述第一反射杯121A的最大亮度中心的光线可与用户观察方向平行，改善边缘分区EA的亮度衰减，如图2B所示。
具体地，如图3所示，所述第二反射杯121B相对于该所述第二反射杯121B所处位置对应的第二曲面法线L2对称，所述第一反射杯121A相对于该所述第一反射杯121A所处位置对应的第一曲面法线L1非对称，使得中心分区CA的反射杯121出射的光线还是向弧形的圆心汇聚，而边缘分区EA的反射杯121出射的光线的最大亮度中心尽量与用户观察方向平行，降低边缘分区EA的亮度衰减程度。本发明实施例提及的反射杯121的曲面法线指的是该反射杯121所处位置的点（由于发光单元12的尺寸很小，介于50~200微米之间，在宏观上可将发光单元12的反射杯121看作点）对应的切平面的垂线，且该垂线经过该点。
具体地，自所述中心分区CA朝向所述边缘分区EA的方向，所述第一反射杯121A的侧壁相对于该所述第一反射杯121A所处位置对应的第一曲面法线L1非对称。所述第二反射杯121B的侧壁相对于该所述第二反射杯121B所处位置对应的第二曲面法线L2对称。
在本发明的实施例中，所述基板11仅包括一个弯曲曲率，即所述基板11各处的曲面法线方向为该处对应的半径方向。在其他实施例中，根据实际设计需要，所述基板11可包括多个不同的弯曲曲率。
进一步地，请继续参阅图4，所述第二反射杯121B的侧壁相对于所述第二曲面法线L2所呈夹角为α，所述第一反射杯121A包括靠近所述中心分区CA的第一侧壁1211和远离所述中心分区的第二侧壁1212，所述第一侧壁1211相对于所述第一曲面法线L1所呈第一夹角为β，所述第二侧壁1212相对于所述第一曲面法线L1所呈第二夹角为γ，其中，0＜β＜α＜90°，90°＞γ＞α＞0。通过将位于边缘分区EA的第一反射杯121A相对靠近所述中心分区CA一侧的侧壁的夹角减小，相对远离所述中心分区CA的另一侧侧壁的夹角增大，可使得位于第一反射杯121A内的LED芯片122在其左侧侧壁（靠近中心分区CA一侧）上反射的光线趋向于平行人眼观察方向射出（图示垂直向上射出），在右侧侧壁（远离中心分区CA一侧）上反射的光线也趋向于平行人眼观察方向射出，从而进一步改善边缘分区EA的亮度衰减。
当反射杯121的侧壁为平直的斜面时，本实施提及的反射杯121与对应的曲面法线之间所呈的夹角，指的是该斜面与该曲面法线所呈的夹角；当反射杯121的侧壁为曲面时，本实施例提及的反射杯121的侧壁与对应的曲面法线之间所呈的夹角，指的是该侧壁对应的曲面的切平面与该曲面法线所呈的夹角。如图5所示，以第二反射杯121B的形状为例，所述第二反射杯121B为上宽下窄的圆柱体形状，所述第二反射杯121B的底壁形状为圆形，所述第二反射杯121B的开口1201形状为圆形，所述第二反射杯121B的开口1201沿背离所述底壁的方向的面积逐渐增大，所述第二反射杯121B的侧壁为曲面形状。
在一具体的实施例中，如图4所示，任一所述第一反射杯121A所处位置对应的所述第一曲面法线L1与位于所述中心分区CA的中心的一所述第二反射杯121B所处位置对应的所述第二曲面法线L2之间所呈的夹角为ω，其中，β=α-ω，γ=α+ω。由于中心分区CA的中心的该第二反射杯121B的最大亮度中心的光线可视为与用户观察方向平行，因此当基板11自该中心向两侧弯曲时，若保持原有的第二反射杯的对称设计，则会使得在弯曲位置的反射杯的最大亮度中心的光线偏离用户观察方向的角度为ω，因此本发明实施例将第一反射杯121A设计为非对称设计，将所述第一反射杯121A的第一侧壁1211的第一夹角β相对于夹角α减小ω，第二侧壁1212的夹角γ相对于夹角α增加ω，从而使得第一反射杯121A最终出射的光线趋向于用户的观察方向。
所述基板11对应的弯曲半径为R，任一所述第一反射杯121A所处位置相对于所述中心分区CA的中心的第二反射杯121B所偏移的水平距离X为RSinθ。
不同尺寸的显示屏在边缘的衰减程度不同，且对显示画面亮度要求也不同，本发明实施例以中小尺寸的显示屏（如手机、平板）为例，对于反射杯121的不对称设计，可从基板11相对水平面（以图示方向的水平面为准）弯曲30度的位置开始进行不对称设计。在其他实施例中，也可从基板11的中心位置之外均开始进行反射杯121的不对称设计。
换言之，在本发明实施例中，如图3所示，任一所述第一反射杯121A所处位置的切线L4与位于所述中心分区CA的中心的一所述第二反射杯121B所处位置的切线L3之间的夹角θ大于或等于30°且小于90°。
进一步地，如图6所示，在本发明实施例中，位于所述中心分区CA的相邻所述第二反射杯121B之间的间距S1大于位于所述边缘分区EA的相邻所述第一反射杯121A之间的间距S2。通过减小边缘分区EA的第一反射杯121A之间的间距S2，即增大边缘分区EA的第一反射杯121A的分布密度，可增加曲面背光模组10边缘分区EA的照射强度，弥补边缘分区EA的亮度衰减。
在本发明的实施例中，由于中心分区CA的亮度衰减程度较低，因此中心分区CA的相邻第二反射杯121B的之间的间距S1可设置为相同。由于越靠近边缘的位置亮度衰减越为明显，因此，在具体的实施例中，自所述中心分区CA朝向所述边缘分区EA的方向，所述边缘分区EA内的相邻所述第一反射杯121A之间的间距S2可逐渐减小。间距S2逐渐减小的变化趋势可呈线性变化、或呈梯度变化、或呈曲线变化等。
进一步地，自所述中心分区CA朝向所述边缘分区EA的方向，所述边缘分区EA的所述第一夹角β逐渐减小，所述第二夹角γ逐渐增大，以使得越靠近边缘的位置，第一反射杯121A的出射的光线方向越平行于人眼观察方向。
具体地，在一些实施例中，根据实际亮度需求，可对边缘分区EA进行进一步划分，所述边缘分区EA可包括多个（至少两个）依次环绕所述中心分区CA的子边缘分区，自所述中心分区CA朝向所述边缘分区EA的方向，多个（至少两个）所述子边缘分区内的相邻所述第一反射杯121A之间的间距S2逐渐减小，同一所述子边缘分区内的相邻所述第一反射杯121A之间的间距S2相同。
在一些实施例中，所述第一反射杯121A的发光强度可大于所述第二反射杯121B的发光强度，以弥补边缘分区EA的亮度衰减。
另一方面，如图7所示，本发明实施例还提供一种曲面显示装置100，所述曲面显示装置100包括上述任一实施例中的曲面背光模组10，以及曲面显示面板30。所述曲面显示面板30设置于所述曲面背光模组10的出光面一侧，所述曲面背光模组10为直下式背光模组，为所述曲面显示面板30提供整面光源。
所述曲面背光模组10的弯曲方向与所述曲面显示面板30的弯曲方向相同，在本发明的实施例中，所述曲面显示面板30为内弯显示面板，即曲面显示面板30朝着曲面显示面板30的两端的显示面趋向于相对的方向弯曲。在其他实施例中，所述曲面显示面板30也可为外弯显示面板，即曲面显示面板30朝着曲面显示面板30的两端的显示面趋向于相背离的方向弯曲。
所述曲面显示面板30包括中心显示区域和位于所述中心显示区域周边的边缘显示区域，所述曲面背光模组10的中心分区CA与曲面显示面板30的中心显示区域相对应，所述曲面背光模组10的边缘分区EA与曲面显示面板30的边缘显示区域相对应。
所述曲面显示面板30可为液晶显示面板，所述曲面显示面板30包括相对设置的第一基板32和第二基板33、夹设于所述第一基板32和所述第二基板33之间的液晶层、设于所述第一基板32外侧的第一偏光片31，以及设于所述第二基板33外侧的第二偏光片34。
进一步地，所述曲面显示面板30和所述曲面背光模组之间还设置有光学膜片20，所述光学膜片20可包括增亮膜、扩散片中的至少一种。
本发明实施例提供的所述曲面显示装置100可应用于车载显示领域，如车载显示屏，还可用在其他的曲面显示领域。
综上，本发明实施例提供一种曲面背光模组10和曲面显示装置100，曲面背光模组10包括中心分区CA以及位于中心分区CA周边的边缘分区EA，曲面背光模组10包括具有第一表面111的基板11，以及设于第一表面111的多个发光单元12，发光单元12包括反射杯121和设于反射杯121内的LED芯片122，多个反射杯121包括位于所述中心分区CA的第二反射杯121B和位于所述边缘分区EA的第一反射杯121A，第一反射杯121A相对于该第一反射杯121A所处位置对应的第一曲面法线L1非对称。通过将边缘分区EA的第一反射杯121A设计为相对于其对应的曲面法线为非对称结构，可提高边缘分区CA的第一反射杯121A的最大亮度中心趋向于平行用户观察方向出光，改善显示装置边缘的亮度衰减。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上对本发明实施例所提供的一种曲面背光模组和曲面显示装置进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例的技术方案的范围。

Claims (20)

  1. 一种曲面背光模组，其中，所述曲面背光模组包括中心分区以及位于所述中心分区周边的边缘分区，所述曲面背光模组包括：
    基板，包括第一表面；以及
    阵列分布的多个发光单元，设置于所述第一表面，所述发光单元包括反射杯和位于所述反射杯内的LED芯片；其中，
    多个所述反射杯包括位于所述边缘分区的第一反射杯和位于所述中心分区的第二反射杯；
    所述第一反射杯相对于该所述第一反射杯所处位置对应的第一曲面法线非对称。
  2. 根据权利要求1所述的曲面背光模组，其中，所述反射杯包括背离所述基板一侧设置的开口，对应的所述LED芯片位于所述开口内，所述开口包括侧壁，自所述中心分区朝向所述边缘分区的方向，所述第一反射杯的侧壁相对于该所述第一反射杯所处位置对应的第一曲面法线非对称。
  3. 根据权利要求2所述的曲面背光模组，其中，所述第二反射杯的侧壁相对于该所述第二反射杯所处位置对应的第二曲面法线对称。
  4. 根据权利要求3所述的曲面背光模组，其中，所述第二反射杯的侧壁相对于所述第二曲面法线所呈夹角为α，所述第一反射杯的侧壁包括靠近所述中心分区的第一侧壁和远离所述中心分区的第二侧壁，所述第一侧壁相对于所述第一曲面法线所呈第一夹角为β，所述第二侧壁相对于所述第一曲面法线所呈第二夹角为γ，其中，0＜β＜α＜90°，90°＞γ＞α＞0。
  5. 根据权利要求4所述的曲面背光模组，其中，任一所述第一反射杯所处位置对应的所述第一曲面法线与位于所述中心分区的中心的一所述第二反射杯所处位置对应的所述第二曲面法线之间所呈夹角为ω，其中，β=α-ω，γ=α+ω。
  6. 根据权利要求4所述的曲面背光模组，其中，位于所述中心分区的相邻所述第二反射杯之间的间距大于位于所述边缘分区的相邻所述第一反射杯之间的间距。
  7. 根据权利要求6所述的曲面背光模组，其中，自所述中心分区朝向所述边缘分区的方向，所述边缘分区的相邻所述第一反射杯之间的间距逐渐减小。
  8. 根据权利要求7所述的曲面背光模组，其中，所述边缘分区包括至少两个依次环绕所述中心分区的子边缘分区，自所述中心分区朝向所述边缘分区的方向，至少两所述子边缘分区内的相邻所述第一反射杯之间的间距逐渐减小，同一所述子边缘分区内的相邻所述第一反射杯之间的间距相同。
  9. 根据权利要求8所述的曲面背光模组，其中，自所述中心分区朝向所述边缘分区的方向，所述边缘分区的所述第一夹角逐渐减小，所述第二夹角逐渐增大。
  10. 根据权利要求6所述的曲面背光模组，其中，所述中心分区的相邻的所述第二反射杯之间的间距相同。
  11. 根据权利要求4所述的曲面背光模组，其中，任一所述第一反射杯所处位置的切线与位于所述中心分区的中心的一所述第二反射杯所处位置的切线之间的夹角大于或等于30°且小于90°。
  12. 根据权利要求1所述的曲面背光模组，其中，所述第一反射杯的发光强度大于所述第二反射杯的发光强度。
  13. 一种曲面显示装置，包括曲面背光模组以及设于所述背光模组的出光面一侧的曲面显示面板，所述曲面背光模组的弯曲方向与所述曲面显示面板的弯曲方向相同，其中，所述曲面背光模组包括中心分区以及位于所述中心分区周边的边缘分区，所述曲面背光模组包括：
    基板，包括第一表面；以及
    阵列分布的多个发光单元，设置于所述第一表面，所述发光单元包括反射杯和位于所述反射杯内的LED芯片；其中，
    多个所述反射杯包括位于所述边缘分区的第一反射杯和位于所述中心分区的第二反射杯；所述第一反射杯相对于该所述第一反射杯所处位置对应的第一曲面法线非对称。
  14. 根据权利要求13所述的曲面显示装置，其中，所述反射杯包括背离所述基板一侧设置的开口，对应的所述LED芯片位于所述开口内，所述开口包括侧壁，自所述中心分区朝向所述边缘分区的方向，所述第一反射杯的侧壁相对于该所述第一反射杯所处位置对应的第一曲面法线非对称。
  15. 根据权利要求14所述的曲面显示装置，其中，所述第二反射杯的侧壁相对于该所述第二反射杯所处位置对应的第二曲面法线对称。
  16. 根据权利要求15所述的曲面显示装置，其中，所述第二反射杯的侧壁相对于所述第二曲面法线所呈夹角为α，所述第一反射杯的侧壁包括靠近所述中心分区的第一侧壁和远离所述中心分区的第二侧壁，所述第一侧壁相对于所述第一曲面法线所呈第一夹角为β，所述第二侧壁相对于所述第一曲面法线所呈第二夹角为γ，其中，0＜β＜α＜90°，90°＞γ＞α＞0。
  17. 根据权利要求16所述的曲面显示装置，其中，任一所述第一反射杯所处位置对应的所述第一曲面法线与位于所述中心分区的中心的一所述第二反射杯所处位置对应的所述第二曲面法线之间所呈夹角为ω，其中，β=α-ω，γ=α+ω。
  18. 根据权利要求16所述的曲面显示装置，其中，位于所述中心分区的相邻所述第二反射杯之间的间距大于位于所述边缘分区的相邻所述第一反射杯之间的间距。
  19. 根据权利要求18所述的曲面显示装置，其中，自所述中心分区朝向所述边缘分区的方向，所述边缘分区的相邻所述第一反射杯之间的间距逐渐减小。
  20. 根据权利要求19所述的曲面显示装置，其中，所述边缘分区包括至少两个依次环绕所述中心分区的子边缘分区，自所述中心分区朝向所述边缘分区的方向，至少两所述子边缘分区内的相邻所述第一反射杯之间的间距逐渐减小，同一所述子边缘分区内的相邻所述第一反射杯之间的间距相同。
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