WO2023065069A1 - 背光模组及显示装置 - Google Patents

背光模组及显示装置 Download PDF

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Publication number
WO2023065069A1
WO2023065069A1 PCT/CN2021/124409 CN2021124409W WO2023065069A1 WO 2023065069 A1 WO2023065069 A1 WO 2023065069A1 CN 2021124409 W CN2021124409 W CN 2021124409W WO 2023065069 A1 WO2023065069 A1 WO 2023065069A1
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WO
WIPO (PCT)
Prior art keywords
light
incident surface
light incident
backlight module
guide plate
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Application number
PCT/CN2021/124409
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English (en)
French (fr)
Inventor
陈瑞麟
李品勋
陈元璋
郑彦平
郑鸿斌
刘仕钒
Original Assignee
瑞仪(广州)光电子器件有限公司
瑞仪光电股份有限公司
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Application filed by 瑞仪(广州)光电子器件有限公司, 瑞仪光电股份有限公司 filed Critical 瑞仪(广州)光电子器件有限公司
Priority to PCT/CN2021/124409 priority Critical patent/WO2023065069A1/zh
Priority to TW110139234A priority patent/TWI788064B/zh
Publication of WO2023065069A1 publication Critical patent/WO2023065069A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • 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 
    • G02F1/015—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 semiconductor elements having potential barriers, e.g. having a PN or PIN junction
    • G02F1/025—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 semiconductor elements having potential barriers, e.g. having a PN or PIN junction in an optical waveguide structure
    • 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

Definitions

  • the present disclosure relates to a light source module and its application, in particular to a backlight module and a display device including the backlight module.
  • the purpose of the present application is to provide a backlight module, which can solve the problem of vignetting at the corners of the backlight module, and can be applied to a narrow bezel display device with arc corners.
  • the backlight module includes a light guide plate and a light source.
  • the light guide plate has a first light incident surface, wherein the light guide plate is provided with a plurality of steps near two opposite corners of the first light incident surface, and the step surface of each step is a second light incident surface.
  • the light source has a substrate, a plurality of first light-emitting units and a plurality of second light-emitting units, wherein the first light-emitting units and the second light-emitting units are arranged on the substrate, wherein the first light-emitting units face the first light incident surface, and the second light-emitting units Facing the second light incident surface respectively.
  • each of the above-mentioned second light incident surfaces is parallel to the first light incident surface.
  • each of the above-mentioned second light incident surfaces is inclined relative to the first light incident surface.
  • the above-mentioned first light incident surface has a first normal.
  • Each second light-incident surface has a second normal line, the extension direction of the second normal line is parallel to the first normal line, and the step portion forms a step along the extension direction of the first normal line.
  • the above-mentioned first light incident surface has a first normal.
  • Each second light incident surface has a second normal line, wherein the second normal line and the first normal line have an intersection point, the intersection point is located outside the light guide plate, and the step portion forms a step along the extending direction of the first normal line.
  • the included angles between the second normals of the above-mentioned second light-incident surface and the first normal increase gradually as the distance from the first light-incident surface increases.
  • the above-mentioned second light emitting units are adjacently disposed on the second light incident surface in a one-to-one manner.
  • a plurality of microstructures are provided on the first light incident surface or the second light incident surface, and the microstructures are configured to diverge the light emitted by the first light emitting unit or the second light emitting unit.
  • the light emission range of at least one of the above-mentioned second light emitting units covers the side edge of the light guide plate.
  • the light emitting range of the above-mentioned second light emitting unit located on the one of the second light incident surfaces farthest from the first light incident surface covers the side edge of the light guide plate.
  • the above-mentioned backlight module further includes a backplane.
  • the back plate includes a base plate and a side wall erected on the base plate, wherein two opposite corners of the light guide plate close to the first light-incident surface respectively have radians, and the side walls extend along the arc, and the substrate of the light source is arranged on the side wall along the side wall. in the backplane.
  • the display device includes a backlight module and a display panel.
  • the display panel is arranged above the backlight module.
  • the present disclosure mainly designs steps on two opposite corners of the light incident side of the light guide plate, so that the light guide plate has a first light incident surface and a plurality of second light incident surfaces with step differences.
  • the light provided by the first light-emitting unit and the second light-emitting unit of the light source can respectively enter the light guide plate from the first light incident surface of the light guide plate and the second light incident surface of the step portion on the corner, and pass through the light incident surface on the corner.
  • the step portion can guide the light to the dark area at the corner of the light guide plate, so as to improve the light uniformity of the light guide plate as a whole.
  • FIG. 1 is a schematic side view illustrating a display device according to an embodiment of the present application
  • FIG. 2 is a schematic diagram illustrating the device of the backlight module according to the first embodiment of the present application
  • Fig. 3 is an enlarged schematic diagram corresponding to the position of part A of Fig. 2;
  • FIG. 4 is a simulation diagram showing optical trends according to the first embodiment of the present application and a comparative example
  • FIG. 5 is a schematic diagram illustrating a device of a backlight module according to a second embodiment of the present application.
  • FIG. 6 is a simulation diagram showing optical trends according to the second embodiment of the present application and a comparative example
  • FIG. 7 is a schematic diagram illustrating a device of a light guide plate according to a third embodiment of the present application.
  • FIG. 8 is a schematic diagram illustrating a device of a backlight module according to a fourth embodiment of the present application.
  • FIG. 9 is a top view illustrating a light source device according to a fourth embodiment of the present application.
  • FIG. 1 is a schematic side view of a display device according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a backlight module according to a first embodiment of the present application.
  • the display device 100 of this embodiment mainly includes a backlight module 200 and a display panel 110 , and the display panel 110 is disposed in front of the backlight module 200 .
  • the display device 100 is a narrow bezel display device with rounded corners.
  • the backlight module 200 includes a backplane 210 , a light guide plate 220 and a light source 230 .
  • the back plate 210 includes a bottom plate 211 and a side wall 212 .
  • the side wall 212 is erected on the bottom plate 211 .
  • the light guide plate 220 and the light source 230 are disposed in the backplane 210 .
  • two opposite corners of the light guide plate 220 near the light-incident side respectively have radians.
  • the curvature of the sidewall 212 corresponds to the curvature of two opposite corners of the light incident side of the light guide plate 220 , and extends along the curvature of the light guide plate 220 , and the light source 230 is disposed in the backplane 210 along the sidewall 212 .
  • FIG. 3 is an enlarged schematic view corresponding to part A of FIG. 2 .
  • the light source 230 has a substrate 231 , a plurality of first light emitting units 232 and a plurality of second light emitting units 233 , wherein the first light emitting units 232 and the second light emitting units 233 are disposed on the substrate 231 .
  • the first light emitting unit 232 and the second light emitting unit 233 are disposed on the same substrate 231 .
  • one side of the light guide plate 220 is defined as the first light incident surface 221, and the light guide plate 220 is provided with a plurality of steps 222 at two opposite corners close to the first light incident surface 221, and each step The stepped surface of the portion 222 is designed as the second light incident surface 222a.
  • the first light incident surface 221 has a first normal A1
  • each second light incident surface 222 a has a second normal A2 .
  • the extending direction of the second normal A2 of each second light incident surface 222a is parallel to the extending direction of the first normal A1 of the first light incident surface 221, and the step portion 222 is along the first normal
  • the extending direction of the line A1 forms a step.
  • the light source 230 is adjacent to the light guide plate 220, and the first light emitting unit 232 of the light source 230 faces the first light incident surface 221, and the second light emitting unit 233 faces the second light incident surface 222a.
  • the second light emitting units 233 are adjacent to the second light incident surface 222a in a one-to-one manner.
  • at least one of the second light emitting units 233 located in the second light incident surfaces 222a has a light output range covering the side edge of the light guide plate 220, for example: half of each second light emitting unit 233 in FIG.
  • the opening angle is 60 degrees, and the light L1 , the light L2 , and the light L3 respectively can cover the side edge of the light guide plate 220 .
  • the second light-emitting unit 233 (for example, the leftmost second light-emitting unit 233 shown in FIG.
  • the light output range covers the side edges of the two opposite corners of the light guide plate 220 relative to the light incident side, for example: the light L1 of the second light emitting unit 233 farthest from the first light incident surface 221 in FIG. edge.
  • the second light emitting unit 233 located on the step portion 222 with a step difference can illuminate the light guide plate 220 along the arc of the light guide plate 220, and fill the dark area at the corner of the light guide plate 220 with light.
  • first light-emitting unit 232 and the second light-emitting unit 233 in the aforementioned light source 230 are arranged on the same substrate 231.
  • the units 233 are accurately aligned; the brightness of the first light emitting unit 232 and the second light emitting unit 233 can also be controlled and compensated separately by means of circuit design to achieve a brightening effect.
  • the design of the first light-emitting unit 232 and the second light-emitting unit 233 located on the same substrate 231 but not on the same horizontal line it can also meet the requirements of large arc angles or irregular shapes such as car displays.
  • Optical quality requirements of the light guide plate such as overall brightness and uniformity.
  • FIG. 4 is a simulation diagram showing the optical trend according to the first embodiment and the comparative example of the present application.
  • the first embodiment is a light guide plate 220 shown in FIG.
  • the optical trend simulation diagram generated by the first light-emitting unit 232 and the second light-emitting unit 233 of 222a is shown in the right diagram of FIG. 4 , and the luminance ratio between the corner and the center is 53.46%.
  • the comparative example uses a general light guide plate with four corners with circular arcs instead of the stepped design shown in Figure 3, and the light source is only installed on the straight side of the light guide plate, so the trend produced by the comparative example
  • the simulated image is shown in the left image of Fig. 4, and its corner-to-center luminance ratio is 30.21%.
  • the first embodiment can significantly improve the brightness of the corners and has better uniformity.
  • FIG. 5 is a schematic diagram illustrating a device of a backlight module according to a second embodiment of the present application.
  • the backlight module 300 of this embodiment mainly includes a light source 310 and a light guide plate 320 .
  • the light source 310 and the light guide plate 320 can be disposed in the backplane 210 as shown in FIG. 1 .
  • the light source 310 has a substrate 311 , a plurality of first light emitting units 312 and a plurality of second light emitting units 313 , wherein the first light emitting units 312 and the second light emitting units 313 are disposed on the substrate 311 .
  • the light guide plate 320 has a first light incident surface 321 , and the light guide plate 320 is provided with a plurality of steps 322 at two opposite corners close to the first light incident surface 321 , and each The step surface of one step portion 322 is designed as the second light incident surface 322a.
  • the first light incident surface 321 has a first normal A3
  • each second light incident surface 322 a has a second normal A4 .
  • each second light incident surface 322a is inclined relative to the first light incident surface 321, so that the second normal line A4 of the second light incident surface 322a and the first normal line A3 have an intersection point X1, and The intersection point X1 is located outside the light guide plate 320 .
  • the included angles between the second normal A4 of the second light-incident surface 322 a and the first normal A3 increase gradually as the distance from the first light-incident surface 321 increases.
  • the second normal A4 of the second light incident surface 322a farthest from the first light incident surface 321 (for example, the leftmost second light incident surface 322a ) is the same as that of the first light incident surface 321.
  • the included angle a2 of the first normal A3 is larger than the second normal A4 of the second light incident surface 322a closest to the first light incident surface 321 (for example, the rightmost second light incident surface 322a ) and the first light incident surface.
  • the step portion 322 forms a step along the extending direction of the first normal A3.
  • the light source 310 is disposed adjacent to the light guide plate 320 , the first light emitting unit 312 faces the first light incident surface 321 , and the second light emitting unit 313 faces the second light incident surface 322 a.
  • the second light emitting units 313 are disposed adjacent to the second light incident surface 322a in a one-to-one manner.
  • the light output range of the second light incident surface 322a farthest from the second light emitting unit 313 on the first light incident surface 321 for example, the leftmost second light emitting unit 313 shown in FIG.
  • the side edges of the two corners of the light board 320 are opposite to the light incident side.
  • the second light-emitting unit 313 located on a different step portion 322 with a step difference can illuminate the light guide plate along the arc of the corner of the light guide plate 320. 320 to fill the dark area at the corner of the light guide plate 320 with light.
  • the inclined design of the step surface (that is, the second light incident surface 322 a ) of the step portion 322 relative to the first light incident surface 321 the light generated by the second light emitting unit 313 disposed thereon can be incident in different ways.
  • the angle enters into the light guide plate 320 , so that light can reach various dark areas at the corners of the light guide plate 320 .
  • the inclination angle of the second light-incident surface 322 a relative to the first light-incident surface 321 can be changed as required.
  • the inclination angles of each second light-incident surface 322 a relative to the first light-incident surface 321 may be the same or different.
  • FIG. 6 is a simulation diagram showing the optical trend according to the second embodiment and the comparative example of the present application.
  • the first embodiment is the light guide plate 320 shown in FIG. 5 having the first light incident surface 321 and the second light incident surface 322a on the step portion 322, and is located on the first light incident surface 321 and the second light incident surface.
  • the optical trend simulation diagram generated by the first light-emitting unit 312 and the second light-emitting unit 313 on 322a is shown in the right diagram of FIG. 6 , and the luminance ratio between the corner and the center is 63.35%.
  • the comparative example is the same as the comparative example in FIG.
  • the second embodiment can also significantly improve the brightness of the corners and has better uniformity.
  • FIG. 7 is a schematic diagram illustrating a device of a light guide plate according to a third embodiment of the present application.
  • the structure of the light guide plate 400 in FIG. 7 is substantially the same as that of the light guide plate 220 shown in FIG. 3 , the only difference being that a plurality of microstructures 411 are provided on the first light incident surface 410 of the light guide plate 400 in FIG. 7 .
  • FIG. 7 is a schematic diagram illustrating a device of a light guide plate according to a third embodiment of the present application.
  • the structure of the light guide plate 400 in FIG. 7 is substantially the same as that of the light guide plate 220 shown in FIG. 3 , the only difference being that a plurality of microstructures 411 are provided on the first light incident surface 410 of the light guide plate 400 in FIG. 7 .
  • FIG. 7 is a schematic diagram illustrating a device of a light guide plate according to a third embodiment of the present application.
  • the structure of the light guide plate 400 in FIG. 7 is substantially the same
  • the light guide plate 400 has a first light incident surface 410 and a plurality of steps 420 disposed at two opposite corners of the light guide plate 400 close to the first light incident surface 410 .
  • the step surface of each step portion 420 is designed as the second light incident surface 421 .
  • a plurality of microstructures 411 are disposed on the first light incident surface 410 .
  • the microstructure 411 is mainly configured to diverge the light emitted by the first light emitting unit 232 shown in FIG. 3 , so as to improve the uniformity of the overall light emission of the light guide plate 400 .
  • microstructures 411 may also be provided on the second light incident surface 421 to achieve the effect of diverging the light emitted by the second light emitting unit 233 as shown in FIG. 3 .
  • the application of the light guide plate 220 shown in FIG. 3 in the display device 100 in the embodiment of the present application is only for demonstration purposes, and is not intended to limit the present disclosure.
  • the backlight modules of other aforementioned embodiments can be applied to display devices to produce the same effect.
  • the substrate of the light source is erected (that is, vertically placed) in the backplane, and the main light-emitting surfaces of the first light-emitting unit and the second light-emitting unit are parallel. Therefore, the substrate can be bent along with the level difference between the first light incident surface and the second light incident surface of the light guide plate, so that the first light emitting unit and the second light emitting unit of the light source can be aligned with the first light incident surface of the light guide plate. surface and the second incident light surface.
  • the light source can also have different structural designs. For example, as shown in FIG. 8 and FIG. 9 , FIG.
  • FIG. 8 is a schematic diagram showing a device of a backlight module according to a fourth embodiment of the present application
  • FIG. 9 is a top view showing a device of a light source according to a fourth embodiment of the present application.
  • the structure of the backlight module 500 of this embodiment is substantially the same as that of the backlight module 200 shown in FIG. 3 , the only difference being that the light source 510 of the backlight module 500 has a different structural design.
  • the backlight module 500 mainly includes a backplane 510 , a light guide plate 520 and a light source 530 .
  • the structures of the backplane 510 and the light guide plate 520 in this embodiment are substantially the same as those of the backplane 210 and the light guide plate 220 shown in FIG. 1 and FIG. 3 , so details are not repeated here.
  • the light source 530 of this embodiment includes a substrate 531, a plurality of first light emitting units 532 and a plurality of second light emitting units 533.
  • the substrate 531 is mainly placed parallel to the backplane 510 , while the first light emitting unit 532 and the second light emitting unit 533 are erected on the backplane 510 .
  • the main light-emitting surfaces of the first light-emitting unit 532 and the second light-emitting unit 533 are perpendicular to the substrate 531 , and the arrangement of the first light-emitting unit 532 and the second light-emitting unit 533 depends on the first light incident surface 521 and the second light-emitting surface of the light guide plate 520 .
  • the positions of the two light-incident surfaces 522 are set, so the first light-incident surface 521 and the second light-incident surface 522 of the light guide plate 520 can be directly aligned. Since the substrate 531 of the light source 530 in this embodiment is not erected in the backplane 210 as shown in FIG. Set of 500 thicknesses.
  • the light guide plate 520 can also be replaced with the light guide plate 320 shown in FIG. 5 or the light guide plate 400 shown in FIG. 7 to achieve the same purpose.
  • the present disclosure mainly designs steps on two opposite corners of the light incident side of the light guide plate, so that the light guide plate has a first light incident surface and multiple second light incident surfaces with step differences. noodle.
  • the light provided by the first light-emitting unit and the second light-emitting unit of the light source can respectively enter the light guide plate from the first light incident surface of the light guide plate and the second light incident surface of the step portion on the corner, and pass through the light incident surface on the corner.
  • the step portion can guide the light to the dark area at the corner of the light guide plate, so as to improve the light uniformity of the light guide plate as a whole.

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Abstract

一种背光模组（200），包含导光板（220）及光源（230）。导光板（220）具有第一入光面（221）。导光板（220）靠近第一入光面（221）的相对两个角落处设有多个阶部（222），且每一个阶部（222）的阶面为第二入光面（222a）。光源（230）具有基板（231）、多个第一发光单元（232）与多个第二发光单元（233）。第一发光单元（232）与第二发光单元（233）设置在基板上（231）。第一发光单元（232）面对第一入光面（221）。第二发光单元（233）分别面对第二入光面（222a）。

Description

背光模组及显示装置 技术领域
本公开涉及一种光源模组及其应用，特别是指一种背光模组及包含此背光模组的显示装置。
背景技术
传统的窄边框显示器大多为矩形，其内部使用具有对应矩形形状的背光模组。为因应市场需求，市面上出现了具有圆弧造型的窄边框显示器。然而，因为圆弧的窄边框的角落的空间较小，故对于具有相同可视区尺寸的显示器来说，矩形显示器所使用的矩形背光模组较难放入具有圆弧角的显示器边框中，且因为应具有圆弧角的显示器边框，则需要减少背光模组的光源数量或是增加边框的尺寸，这不但会导致显示器出现暗角，更会影响整体的外观。
发明内容
因此，本申请的目的在于提供一种背光模组，其可解决背光模组角落出现暗角的问题，并可应用至具有圆弧角的窄边框显示装置中。
根据本申请的上述目的，提出一种背光模组。此背光模组包含导光板及光源。导光板具有第一入光面，其中该导光板靠近第一入光面的相对两个角落处设有多个阶部，且每一个阶部的阶面为第二入光面。光源具有基板、多个第一发光单元与多个第二发光单元，其中第一发光单元与第二发光单元设置在基板上，其中第一发光单元面对第一入光面，第二发光单元分别面对第二入光面。
依据本申请的一实施例，上述的每一个第二入光面与第一入光面平行。
依据本申请的一实施例，上述的每一个第二入光面相对第一入光面呈 倾斜。
依据本申请的一实施例，上述的第一入光面具有第一法线。每一个第二入光面具有第二法线，第二法线的延伸方向与第一法线平行，且阶部沿着第一法线的延伸方向形成段差。
依据本申请的一实施例，上述的第一入光面具有第一法线。每一个第二入光面具有第二法线，其中第二法线与第一法线具有交会点，交会点位于导光板的外部，且阶部沿着第一法线的延伸方向形成段差。
依据本申请的一实施例，上述的第二入光面的第二法线分别与第一法线的夹角随着远离第一入光面而渐增。
依据本申请的一实施例，上述的第二发光单元以一对一的方式邻设于第二入光面。
依据本申请的一实施例，上述的第一入光面或第二入光面上设有多个微结构，该微结构配置为发散第一发光单元或第二发光单元所射出的光线。
依据本申请的一实施例，上述的第二发光单元中的至少一者的出光范围涵盖导光板的侧缘。
依据本申请的一实施例，上述的位于第二入光面中最远离第一入光面的一者上的第二发光单元的出光范围涵盖导光板的侧缘。
依据本申请的一实施例，上述的背光模组还包含背板。背板包含底板以及立设于底板上的侧壁，其中导光板靠近第一入光面的两个相对角落分别具有弧度，且侧壁沿着弧度延伸，且光源的基板沿着侧壁设置在背板中。
根据本申请的上述目的，另提出一种显示装置。此显示装置包含背光模组以及显示面板。显示面板设置在背光模组的上方。
由上述可知，本公开主要是在导光板的入光侧的相对两个角落上设计阶部，以使导光板同时具有第一入光面以及具有段差的多个第二入光面。藉此，光源的第一发光单元与第二发光单元所提供的光线可分别从导光板的第一入光面以及角落上的阶部的第二入光面进入导光板中，通过角落上的阶部可将光线引导至导光板的角落暗区，以提升整体导光板的出光均齐 度。
附图说明
为了更完整了解实施例及其优点，现参照结合所附附图所做的下列描述，其中：
图1是绘示依照本申请的一实施方式的显示装置的侧面示意图；
图2是绘示依照本申请的第一实施方式的背光模组的装置示意图；
图3是对应图2的A部分的位置放大示意图；
图4是绘示依照本申请第一实施方式与比较例的光学趋势模拟图；
图5是绘示依照本申请的第二实施方式的背光模组的装置示意图；
图6是绘示依照本申请第二实施方式与比较例的光学趋势模拟图；
图7是绘示依照本申请的第三实施方式的导光板的装置示意图；
图8是绘示依照本申请的第四实施方式的背光模组的装置示意图；以及
图9是绘示依照本申请的第四实施方式的光源的装置的俯视图。
具体实施方式
请参照图1及图2，图1是绘示依照本申请的一实施方式的显示装置的侧面示意图，图2是绘示依照本申请的第一实施方式的背光模组的装置示意图。本实施方式的显示装置100主要包含背光模组200以及显示面板110，且显示面板110设置在背光模组200的前方。在一实施例中，显示装置100为角落具有圆弧设计的窄边框显示装置。背光模组200包含背板210、导光板220及光源230。背板210包含底板211以及侧壁212。侧壁212立设于底板211上。导光板220与光源230设置在背板210中。其中，导光板220靠近其入光侧的两个相对角落分别具有弧度。侧壁212的弧度与导光板220的入光侧的相对两个角落的弧度相对应，且顺着导光板220的弧度延伸，且光源230沿着侧壁212设置在背板210中。
另请一并参照图3，图3是对应图2的A部分的位置放大示意图。在一实施例中，光源230具有基板231、多个第一发光单元232与多个第二 发光单元233，其中第一发光单元232与第二发光单元233设置在基板231上。在一例子中，第一发光单元232与第二发光单元233设置在同一基板231上。在一实施例中，导光板220的一侧面定义为第一入光面221，且导光板220靠近第一入光面221的相对两个角落处设有多个阶部222，且每一个阶部222的阶面设计为第二入光面222a。如图3所示，在一实施例中，第一入光面221具有第一法线A1，每一个第二入光面222a具有第二法线A2。在本实施例中，每一第二入光面222a的第二法线A2的延伸方向平行于第一入光面221的第一法线A1的延伸方向，且阶部222沿着第一法线A1的延伸方向形成段差。
光源230邻设于导光板220，且光源230的第一发光单元232面对第一入光面221，第二发光单元233面对第二入光面222a。在一实施例中，第二发光单元233以一对一的方式邻设于第二入光面222a。在一实施例中，至少一位于这些第二入光面222a中的该第二发光单元233的出光范围涵盖该导光板220的侧缘，例如：图3中每一个第二发光单元233的半开光角为60度，分别为光线L1、光线L2、光线L3可涵盖该导光板220的侧缘。在另一实施例中，第二入光面222a中最远离第一入光面221的一者上的第二发光单元233(例如图3所示的最左侧的第二发光单元233)的出光范围涵盖导光板220相对于入光侧相对两角落的侧缘，例如：图3中最远离第一入光面221的第二发光单元233的光线L1涵盖了最大范围的导光板220的侧缘。具体而言，通过在导光板220的入光侧角落的阶部222设计，来让位于具有段差的阶部222上的第二发光单元233能够顺着导光板220的弧度照射导光板220，并将光线填补导光板220角落的暗区。除此之外，前述光源230中的第一发光单元232与第二发光单元233设于同一个基板231上，一方面可以利用打件工序精准控制公差，使第一发光单元232与第二发光单元233精准对位；利用电路设计手段也可分别控制对第一发光单元232与第二发光单元233的亮度进行补偿，达到增亮效果。另一方面，藉由位于同一个基板231但不在同一条水平线上的第一发光单元232与第二发光单元233的设计，还可满足如车用显示器等具有大圆弧角或不规则形状的导光板的光学品味的要求，例如整体亮度与均齐 度。
另请同时参照图3及图4，其中图4是绘示依照本申请第一实施方式与比较例的光学趋势模拟图。其中，第一实施例为图3所示的具有第一入光面221与阶部222上的第二入光面222a的导光板220，搭配位于第一入光面221与第二入光面222a的第一发光单元232与第二发光单元233，其所产生的光学趋势模拟图如图4的右侧图所示，其角落与中心的辉度比为53.46％。比较例则是使用一般的四个角落具有圆弧的导光板，而不具有如图3所示的阶部设计，且光源则仅设置在导光板的直线侧边，故比较例所产生的趋势模拟图如图4的左侧图所示，其角落与中心的辉度比为30.21％。显然地，由图4可知，第一实施例可明显提升角落的亮度并具有较佳的均齐度。
本公开的背光模组也可以有不同的结构设计。请参照图5，图5是绘示依照本申请的第二实施方式的背光模组的装置示意图。本实施方式的背光模组300主要包含光源310及导光板320。光源310与导光板320可设置在如图1所示的背板210中。光源310具有基板311、多个第一发光单元312与多个第二发光单元313，其中第一发光单元312与第二发光单元313设置在基板311上。
如图5所示，在本实施例中，导光板320具有第一入光面321，且导光板320靠近第一入光面321的相对两个角落处设有多个阶部322，且每一个阶部322的阶面设计为第二入光面322a。如图5所示，在一实施例中，第一入光面321具有第一法线A3，每一个第二入光面322a具有第二法线A4。在本实施例中，每一个第二入光面322a相对第一入光面321呈倾斜，而使第二入光面322a的第二法线A4与第一法线A3具有交会点X1，且交会点X1位于导光板320的外部。在本实施例中，第二入光面322a的第二法线A4分别与第一法线A3的夹角随着远离第一入光面321而渐增。例如如图5所示，离第一入光面321最远的第二入光面322a(例如最左侧的第二入光面322a)的第二法线A4与第一入光面321的第一法线A3的夹角a2大于离第一入光面321最近的第二入光面322a(例如最右侧的第二入光面322a)的第二法线A4与第一入光面321的第一法线A3 的夹角a1。此外，阶部322沿着第一法线A3的延伸方向形成段差。
请继续参照图5，光源310邻设于导光板320，且第一发光单元312面对第一入光面321，第二发光单元313面对第二入光面322a。在一实施例中，第二发光单元313以一对一的方式邻设于第二入光面322a。在本实施例中，第二入光面322a中最远离第一入光面321上的第二发光单元313(例如图5所示的最左侧的第二发光单元313)的出光范围涵盖导光板320相对于入光侧相对两角落的侧缘。具体而言，通过在导光板320的入光侧角落的阶部322设计，来让位于具有段差的不同阶部322上的第二发光单元313能够顺着导光板320角落的弧度照射导光板320，以将光线填补导光板320角落的暗区。此外，通过阶部322的阶面(也就是第二入光面322a)相对第一入光面321倾斜的设计，可以让设置在其上的第二发光单元313所产生的光线以不同的入射角度进入导光板320中，使光线能够到达导光板320角落的各个暗区。在一些实施例中，第二入光面322a相对第一入光面321的倾斜角度可依需求改变。在一些实施例中，每一个第二入光面322a相对第一入光面321倾斜的角度可为相同，亦可为不同。例如：当角落圆弧设计的曲率半径越大时，则越远离第一入光面321的第二入光面322a倾斜的角度大于远离第一入光面321的第二入光面322a倾斜的角度，如此，相较于每一个第二入光面322a相对第一入光面321倾斜角度相同的设计，倾斜角度不同的设计更可使用较少颗数的第二发光单元233就能提升角落的亮度，具有降低成本的功效。
另请同时参照图5及图6，其中图6是绘示依照本申请第二实施方式与比较例的光学趋势模拟图。其中，第一实施例为图5所示的具有第一入光面321与阶部322上的第二入光面322a的导光板320，搭配位于第一入光面321与第二入光面322a上的第一发光单元312与第二发光单元313，其所产生的光学趋势模拟图如图6的右侧图所示，其角落与中心的辉度比为63.35％。比较例与图4的比较例相同，其使用一般的四个角落具有圆弧的导光板，而不具有如图5所示的阶部设计，且光源则仅设置在导光板的直线侧边，故比较例所产生的趋势模拟图如图6的左侧图所示，其角落与中心的辉度比为30.21％。显然地，由图6可知，第二实施例也可明显提升 角落的亮度并具有较佳的均齐度。
在一些实施例中，可在导光板的第一入光面或第二入光面上设有多个微结构。例如图7所示，图7是绘示依照本申请的第三实施方式的导光板的装置示意图。图7的导光板400的结构大致上与图3所示的导光板220的结构相同，差异仅在于图7的导光板400的第一入光面410上设有多个微结构411。如图7所示，导光板400具有第一入光面410以及设置在导光板400靠近第一入光面410的相对两个角落处的多个阶部420。其中，每一个阶部420的阶面设计为第二入光面421。在本实施例中，第一入光面410上设有多个微结构411。微结构411主要配置为发散例如图3所示的第一发光单元232所射出的光线，进而提升导光板400的整体出光均匀度。在其他例子中，也可同时在第二入光面421设置微结构411，以达到使例如图3所示的第二发光单元233所射出的光线发散的效果。
需要说明的是，本案实施例以图3所示的导光板220应用于显示装置100中仅用来作为示范说明用，并非用以限制本公开。前述其他实施例的背光模组(例如图5所示的导光板320或图7所示的导光板400)均可应用于显示装置中，以产生同样的效果。
在前述实施例中，例如图3的光源230以及图5的光源310，光源的基板立设(也就是垂直放置)在背板中，且第一发光单元与第二发光单元的主要出光面平行于基板，故基板可以随着导光板的第一入光面与第二入光面的段差弯折，以使光源的第一发光单元与第二发光单元能够对准导光板的第一入光面与第二入光面。在其他实施例中，光源也可有不同的结构设计。例如图8及图9所示，图8是绘示依照本申请的第四实施方式的背光模组的装置示意图，图9是绘示依照本申请的第四实施方式的光源的装置上视图。本实施方式的背光模组500的结构与图3所示的背光模组200的结构大致上相同，差异仅在于背光模组500的光源510具有不同的结构设计。
如图8及图9所示，背光模组500主要包含背板510、导光板520及光源530。本实施例的背板510及导光板520的结构实质上与图1及图3所示的背板210与导光板220的结构实质上相同，故于此不再赘述。本实 施例的光源530包含基板531、多个第一发光单元532与多个第二发光单元533。在本实施方式中，基板531主要平行摆放在背板510中，而第一发光单元532与第二发光单元533则立设于背板510上。其中，第一发光单元532与第二发光单元533的主要发光面垂直于基板531，且第一发光单元532与第二发光单元533的排列方式依据导光板520的第一入光面521与第二入光面522的位置而设定，故可直接对准导光板520的第一入光面521与第二入光面522。由于本实施方式的光源530的基板531并非如图1所示的基板231立设在背板210中，故可降低第一发光单元532与第二发光单元533的高度，以薄化整体背光模组500的厚度。当然，在其他实施例中，导光板520也可置换为例如图5所示的导光板320或是图7所示的导光板400，以达到相同的目的。
由上述本公开实施方式可知，本公开主要是在导光板的入光侧的相对两个角落上设计阶部，以使导光板同时具有第一入光面以及具有段差的多个第二入光面。藉此，光源的第一发光单元与第二发光单元所提供的光线可分别从导光板的第一入光面以及角落上的阶部的第二入光面进入导光板中，通过角落上的阶部可将光线引导至导光板的角落暗区，以提升整体导光板的出光均齐度。
虽然本公开的实施例已以实施例公开如上，然其并非用以限定本公开的实施例，任何本领域技术人员，在不脱离本公开的实施例的精神和范围内，应当可作些许的更动与润饰，故本公开的实施例的保护范围应当以权利要求书所界定的保护范围为准。
【附图标记说明】
100：显示装置
110：显示面板
200：背光模组
210：背板
211：底板
212：侧壁
220：导光板
221：第一入光面
222：阶部
222a：第二入光面
230：光源
231：基板
232：第一发光单元
233：第二发光单元
300：背光模组
310：光源
311：基板
312：第一发光单元
313第二发光单元
320：导光板
321：第一入光面
322：阶部
322a：第二入光面
400：导光板
410：第一入光面
411：微结构
420：阶部
421：第二入光面
500：背光模组
510：背板
520：导光板
521：第一入光面
522：第二入光面
530：光源
531：基板
532：第一发光单元
533：第二发光单元
A1：第一法线
A2：第二法线
A3：第一法线
A4：第二法线
a1：夹角
a2：夹角
L1：光线
L2：光线
L3：光线
X1：交会点

Claims (12)

  1. 一种背光模组，包含：
    导光板，具有第一入光面，其中该导光板靠近该第一入光面的相对两个角落处设有多个阶部，其中每一该些阶部的阶面为第二入光面；以及
    光源，具有基板、多个第一发光单元与多个第二发光单元，其中所述多个第一发光单元与所述多个第二发光单元设置在该基板上，其中所述多个第一发光单元面对该第一入光面，所述多个第二发光单元分别面对所述多个第二入光面。
  2. 如权利要求1所述的背光模组，其中每一所述多个第二入光面与该第一入光面平行。
  3. 如权利要求1所述的背光模组，其中每一所述多个第二入光面相对该第一入光面呈倾斜。
  4. 如权利要求1所述的背光模组，其中
    该第一入光面具有第一法线；以及
    每一所述多个第二入光面具有第二法线，所述第二法线的延伸方向与该第一法线平行，且所述多个阶部沿着该第一法线的延伸方向形成段差。
  5. 如权利要求1所述的背光模组，其中该第一入光面具有第一法线；以及
    每一所述多个第二入光面具有第二法线，其中第二法线与该第一法线具有交会点，该交会点位于该导光板的外部，且所述多个阶部沿着该第一法线的延伸方向形成段差。
  6. 如权利要求5所述的背光模组，其中所述多个第二入光面的所述第二法线分别与该第一法线的夹角随着远离该第一入光面而渐增。
  7. 如权利要求1所述的背光模组，其中所述多个第二发光单元以一对一的方式邻设于所述多个第二入光面。
  8. 如权利要求1所述的背光模组，其中该第一入光面或所述多个第二入光面上设有多个微结构，所述微结构配置为发散所述多个第一发光单元或所述多个第二发光单元所射出的光线。
  9. 如权利要求1所述的背光模组，其中所述多个第二发光单元中的至少一者的出光范围涵盖该导光板的侧缘。
  10. 如权利要求1所述的背光模组，其中位于所述多个第二入光面中最远离该第一入光面的一者上的该第二发光单元的出光范围涵盖该导光板的侧缘。
  11. 如权利要求1所述的背光模组，还包含背板，其中该背板包含底板以及立设于该底板上的侧壁，其中该导光板靠近该第一入光面的两个相对角落分别具有弧度，且该侧壁沿着该弧度延伸，且该光源的该基板沿着该侧壁设置在该背板中。
  12. 一种显示装置，包含：
    如权利要求1至权利要求11中任一项所述的背光模组；以及
    显示面板，设置在该背光模组的上方。
PCT/CN2021/124409 2021-10-18 2021-10-18 背光模组及显示装置 WO2023065069A1 (zh)

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