WO2021051347A1 - 光源结构、背光模组及显示装置 - Google Patents

光源结构、背光模组及显示装置 Download PDF

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Publication number
WO2021051347A1
WO2021051347A1 PCT/CN2019/106658 CN2019106658W WO2021051347A1 WO 2021051347 A1 WO2021051347 A1 WO 2021051347A1 CN 2019106658 W CN2019106658 W CN 2019106658W WO 2021051347 A1 WO2021051347 A1 WO 2021051347A1
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WIPO (PCT)
Prior art keywords
light source
light
distance
emitting units
source structure
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PCT/CN2019/106658
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English (en)
French (fr)
Inventor
陈瑞麟
李品勋
郑彦平
陈元璋
黄瑞琳
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瑞仪光电(苏州)有限公司
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Application filed by 瑞仪光电(苏州)有限公司 filed Critical 瑞仪光电(苏州)有限公司
Priority to KR1020217002476A priority Critical patent/KR102652767B1/ko
Priority to PCT/CN2019/106658 priority patent/WO2021051347A1/zh
Priority to CN201980007091.2A priority patent/CN112997234B/zh
Priority to JP2021500420A priority patent/JP2023500553A/ja
Priority to TW108134112A priority patent/TWI724554B/zh
Priority to TW109127230A priority patent/TWI724961B/zh
Priority to US17/033,961 priority patent/US11009651B2/en
Priority to US17/192,907 priority patent/US11243344B2/en
Publication of WO2021051347A1 publication Critical patent/WO2021051347A1/zh
Priority to US17/645,315 priority patent/US11513281B2/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs

Definitions

  • the present invention relates to a light source element, and in particular to a light source structure, a backlight module and a display device.
  • FIG. 1 is a schematic diagram showing the structure of the existing light source.
  • the light source structure 100 generally used for direct type backlight modules mainly includes a substrate 110 and a plurality of light-emitting diodes 120 arrayed on the substrate 110 at equal intervals.
  • the light generated from the light-emitting diodes 120 can be further mixed by an optical film to form a surface light source.
  • FIG. 2 is a brightness simulation diagram using an existing light source structure. It can be seen from FIG. 2 that the light-emitting diodes 120 are arranged at equal intervals, so it is easy to form a dark band (dark area) with a width W1 and a dark band (dark area) with a width W2 between adjacent light-emitting diodes. This will cause the appearance of the backlight module to look obvious in contrast between bright and dark bands and uneven brightness.
  • the object of the present invention is to provide a light source structure, a backlight module and a display device, which can generate light with uniform brightness to improve the optical appearance of the backlight module and the display device.
  • the light source structure includes a substrate and a plurality of light source groups.
  • the light source group is arrayed on the substrate.
  • Each light source group includes a plurality of light-emitting units. There is a first distance between any two adjacent light-emitting units in each light source group, and there is a second distance between the closest light-emitting units in any two adjacent light source groups. Wherein, the second distance is smaller than the first distance.
  • the above-mentioned light source groups are arranged at equal intervals, and the first distance is less than half of the distance between adjacent light source groups.
  • the light-emitting units in each of the above-mentioned light source groups are arranged in a square shape.
  • the light-emitting units in each of the above-mentioned light source groups are arranged in a regular polygon along a circular track.
  • the relationship between the radius of the circular track and the distance between adjacent light source groups is 3.5A3 ⁇ S1>2A3, where A3 is the radius and S1 is the distance.
  • the aforementioned substrate has a first side edge extending along a first direction and a second side edge extending along a second direction, wherein the first side edge is perpendicular to the second side edge.
  • the light source groups are arrayed along the first direction and the second direction.
  • connection line between any two adjacent light-emitting units in each light source group described above is not parallel to the first side or the second side.
  • the light-emitting units in each of the above-mentioned light source groups are arranged in a regular polygon along a circular track, wherein the regular polygon has a number of sides and the circular track has a center.
  • the angle between the first line and the second line is not equal to 180 degrees divided by the side length.
  • a backlight module includes the aforementioned light source structure and at least one optical film.
  • the optical film is arranged above the light source structure.
  • the display device includes the aforementioned backlight module and a display panel. Among them, the display panel is arranged in front of the backlight module.
  • the present invention changes the original design rules of the light source structure. After a plurality of light-emitting units are constructed to form a light source group, these light source groups are arrayed on the substrate, and at the same time, the adjacent light source groups are The distance between the two closest light-emitting units is smaller than the distance between the adjacent light-emitting units in the light source group, so that the dark band width of the light-emitting surface of the overall light source structure can be reduced, and the uniformity of the backlight module can be improved.
  • FIG. 1 is a schematic diagram showing the structure of an existing light source
  • Figure 2 is a brightness simulation diagram using an existing light source structure
  • FIG. 3 is a schematic diagram showing a device of a light source structure according to the first embodiment of the present invention.
  • FIG. 5 is a schematic diagram showing a device of a light source structure according to a second embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a display device according to an embodiment of the present invention.
  • the light source structure 200 mainly includes a substrate 210 and a plurality of light source groups 220.
  • the substrate 210 has a first side 211 and a second side 212 perpendicular to the first side 211.
  • the first side 211 extends along the first direction D1
  • the second side 212 extends along the second direction D2
  • the first direction D1 is perpendicular to the second direction D2.
  • the light source group 220 is arrayed along the first direction D1 and the second direction D2.
  • the light source groups 220 are arranged on the substrate 210 at equal intervals, and there is a distance S1 between any two adjacent light source groups 220.
  • each light source group 220 includes a plurality of light emitting units 221, and the light emitting units 221 in each light source group 220 are arranged in a regular polygon along a circular track.
  • the connection line between any two adjacent light emitting diodes 221 in each light source group 220 is not parallel to the first side 211 or the second side 212.
  • the light emitting units 221 in each light source group 220 are arranged in a square, and any side length of the square is not parallel to the first side 211 or the second side 212.
  • the arrangement of the multiple light-emitting units 221 is as far as possible not to be parallel to the edge of the display (that is, the first side 211 or the second side 212 of the aforementioned substrate 210). In this way, in terms of visual effects, users are less likely to find bright bands with regularly arranged light sources.
  • each light source group 220 there is a first distance A1 between any two adjacent light emitting units 221 along a circular track.
  • the distance between the centers of all light-emitting units 221 of each light source group 220 that is, the center position of the circular track to which each light source group 220 belongs
  • the centers of all light-emitting units 221 of adjacent light source groups 220 Defined as the spacing S1.
  • the distance between any light-emitting unit 221 of the light source group 220 and the light-emitting unit 221 of the adjacent light source group 220 closest to any of the aforementioned light-emitting units 221 is defined as the second distance A2.
  • the distance between the closest light emitting unit 221 in any two adjacent light source groups 220 is the second distance A2.
  • the second distance A2 is smaller than the first distance A1.
  • the light source structure 200 can produce a better light uniformity effect.
  • the length of the first distance A1 is less than half of the distance S1 between any two adjacent light source groups 220.
  • FIG. 4 is a brightness simulation diagram of the light source structure using the first embodiment of the present invention. It can be seen from FIG. 4 that, compared with the existing light source structure 100 in FIG. 1, by rotating the light-emitting unit 221 along a circular track to form a regular polygon, it can make any two adjacent The distance between the closest light emitting units 221 in the light source group 220 (for example, the second distance A2) is shortened in the first direction D1 and/or the second direction D2, thereby being designed to be smaller than that of each light source group 220 The first distance A1 between any two adjacent light-emitting units 221 further reduces the width W3 and the width W4 of the dark band of the light source structure 200 in FIG. 3.
  • the distance A1 between any two adjacent light-emitting units 221 further reduces the width W3 and the width W4 of the dark band of the light source structure 200 in FIG. 3.
  • the area of the dark area in FIG. 4 is significantly smaller than the area of the dark area in FIG. 2, and the light and dark contrast of the dark and light colors in FIG. 4 is smaller than the light and dark contrast of the dark and light colors shown in FIG. More evenly. Therefore, when the light source structure 200 of the present embodiment is applied to a backlight module and used with an optical film, a relatively uniform appearance can be produced as a whole.
  • each light source group 220 although the light emitting units 221 are arranged in a regular polygon along a circular track, any side of the regular polygon is not parallel to the first side 211 or the second side of the substrate 210. ⁇ 212.
  • the included angle ⁇ 1 between the first connection line B1 and the second connection line B2 is not equal to 180 degrees divided by the side length of the regular polygon.
  • the light-emitting units 221 are arranged in a square along a circular track, so the included angle ⁇ 1 is not equal to 180 degrees divided by 4 (that is, 45 degrees). This is to exclude the light from the rotated light source group.
  • the unit 221 generates the arrangement of the conventional rectangular array. Therefore, in each light source group 220, in the case of determining the number of sides of the regular polygon arranged by the light-emitting units 221 along the circular trajectory, the included angle ⁇ 1 can be determined according to the needs of the user, thereby determining the light-emitting units 221 is the rotation angle of a regular polygon arranged along a circular track.
  • the distance S1 between any two adjacent light source groups 220 should exceed twice the length of the third distance A3.
  • the distance S1 between any two adjacent light source groups 220 should not be greater than 3.5 times the length of the third distance A3.
  • the relationship between the radius of the circular track (the third distance A3) and the distance S1 between the adjacent light source groups 220 can be determined by the relation 3.5A3 ⁇ S1>2A3 Said. In this way, it can be ensured that when the light source structure 200 of the present embodiment is applied to a backlight module and used with an optical film, the entire backlight module has a more uniform appearance.
  • FIG. 5 is a schematic diagram illustrating a light source structure according to the second embodiment of the present invention.
  • the light source structure 300 shown in FIG. 5 also includes a substrate 310 and a plurality of light source groups 320.
  • the substrate 310 has a first side 311 and a second side 312.
  • the first side 311 extends along the first direction D1
  • the second side 312 extends along the second direction D2
  • the first direction D1 is perpendicular to the second direction D2.
  • the light source group 320 is arrayed along the first direction D1 and the second direction D2.
  • the light source groups 320 are arranged on the substrate 310 at equal intervals, and there is a distance S2 between any two adjacent light source groups 320.
  • each light source group 320 includes a plurality of light-emitting units 321.
  • the light-emitting units 321 in each light source group 320 are arranged in a regular triangle along a circular track.
  • the second distance A5 is smaller than the first distance A4.
  • each light source group 320 although the light emitting units 321 are arranged in an equilateral triangle along a circular track, any side of the equilateral triangle is not parallel to the first side 311 or the second side 312 of the substrate 310 .
  • the included angle ⁇ 2 between the first line B3 and the second line B4 is not equal to 180 degrees divided by the side length of the equilateral triangle (that is, 60 degrees).
  • each light source group 320 in the case of determining the number of sides of the regular polygon that the light-emitting units 321 are arranged along the circular trajectory, the user can determine that the light-emitting units 321 follow the circle by changing the angle ⁇ 2.
  • the light-emitting units are described by taking the light-emitting units arranged in a square and an equilateral triangle as an example, this is not intended to limit the present invention. That is, in other embodiments, the light-emitting units can also be arranged in other regular polygons, such as regular pentagons, regular hexagons, regular heptagons, and so on.
  • FIG. 6 is a schematic diagram of a display device according to an embodiment of the present invention.
  • the display device 400 of this embodiment includes a backlight module 410 and a display panel 420.
  • the backlight module 410 includes a light source structure 200 as shown in FIG. 3 and at least one optical film 411 disposed above the light source structure 200.
  • the display panel 420 is arranged in front of the backlight module 410, so the light generated by the light source structure 200 can enter the display panel 420 after passing through the optical film 411 to emit light from the display panel 420.
  • the light source structure 200 shown in FIG. 3 is applied to a display device for demonstration purposes only, and is not intended to limit the present invention.
  • the light source structure of the aforementioned other embodiments, such as the light source structure 300 shown in FIG. 5, can also be applied to a display device and can produce the same effect.
  • the present invention changes the original design rules of the light source structure. After a plurality of light-emitting units are constructed to form a light source group, these light source groups are arrayed on the substrate, and at the same time, adjacent The distance between the two closest light-emitting units between the light source groups is smaller than the distance between the adjacent light-emitting units along the circular track in the light source group, so that the dark band width of the light-emitting surface of the overall light source structure can be reduced, and the backlight mode can be improved. The uniformity of the group.

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Abstract

一种光源结构、背光模组及显示装置。此光源结构包含基板以及多个光源群组。光源群组阵列于基板上。每一个光源群组包含多个发光单元。每一光源群组中的任意两个相邻的发光单元之间具有第一距离。任意两个相邻的光源群组中的最靠近的发光单元之间具有第二距离。第二距离小于第一距离。

Description

光源结构、背光模组及显示装置 技术领域
本发明涉及光源元件，且特别涉及光源结构、背光模组及显示装置。
背景技术
请参照图1，其为绘示现有的光源结构的示意图。一般用于直下式背光模组的光源结构100主要包含基板110以及多个等间距阵列于基板110上的发光二极管120，从发光二极管120产生的光线可进一步通过光学膜片混合而形成面光源。
然而，请参照图2，图2为使用现有的光源结构的亮度仿真图。由图2可知，发光二极管120以等间距的方式排列，因此容易在相邻的发光二极管之间形成具有宽度W1的暗带(深色区域)以及具有宽度W2的暗带(深色区域)，这会导致背光模组的外观看起来亮暗带对比明显，且亮度不均匀。
发明内容
因此，本发明的目的在于提供光源结构、背光模组及显示装置，此光源模组能够产生亮度均匀的光线，以提升背光模组及显示装置的光学外观。
根据本发明的上述目的，提出一种光源结构。此光源结构包含基板以及多个光源群组。光源群组阵列于基板上。每一个光源群组包含多个发光单元。每一光源群组中的任意两个相邻的发光单元之间具有第一距离，且任意两个相邻的光源群组中的最靠近的发光单元之间具有第二距离。其中，第二距离小于第一距离。
依据本发明的一实施例，上述的光源群组呈等间距排列，且第一距离小于相邻的光源群组之间的间距的一半。
依据本发明的一实施例，上述的每一个光源群组中的发光单元排列成正方形。
依据本发明的一实施例，上述的每一个光源群组中的发光单元沿着圆形轨迹排列成正多边形。
依据本发明的一实施例，上述的圆形轨迹的半径与相邻的光源群组之间的间距的关系式为3.5A3≧S1>2A3，其中A3为半径，S1为间距。
依据本发明的一实施例，上述的基板具有沿着第一方向延伸的第一侧边以及与沿着第二方向延伸的第二侧边，其中第一侧边垂直于第二侧边。光源群组沿着第一方向与第二方向阵列。
依据本发明的一实施例，上述的每一个光源群组中的任意两个相邻的发光单元之间的连线不平行于第一侧边或第二侧边。
依据本发明的一实施例，上述的每一个光源群组中的发光单元沿着圆形轨迹排列成正多边形，其中正多边形具有边长数，且圆形轨迹具有圆心。任意两个相邻的圆形轨迹的圆心之间具有第一连线，每一个光源群组中的发光单元的任一者与对应的圆形轨迹的圆心之间具有第二连线，其中第一连线与第二连线的夹角不等于180度除以边长数。
根据本发明的上述目的，提出一种背光模组。此背光模组包含前述的光源结构以及至少一个光学膜片。光学膜片设置在光源结构的上方。
根据本发明的上述目的，提出一种显示装置。此显示装置包含前述的背光模组以及显示面板。其中，显示面板设置在背光模组的前方。
由上述可知，本发明改变了光源结构的原有设计规则，通过将多个发光单元建构成一个光源群组后，再将这些光源群组阵列于基板上，同时使得相邻的光源群组之间最近的两个发光单元之间的距离小于光源群组中的相邻的发光单元的距离，从而能够缩减整体光源结构发光面的暗带宽度，提升背光模组的均匀度。
附图说明
为了更完整地了解实施例及其优点，现在参照附图做出下列描述，其中：
图1为绘示现有的光源结构的示意图；
图2为使用现有的光源结构的亮度仿真图；
图3为绘示依照本发明的第一实施方式的光源结构的装置示意图；
图4为使用本发明的第一实施方式的光源结构的亮度仿真图；
图5为绘示依照本发明的第二实施方式的光源结构的装置示意图；以及
图6为绘示依照本发明的实施方式的显示装置的装置示意图。
具体实施方式
请参照图3，其为绘示依照本发明的第一实施方式的光源结构的装置示意图。在本实施例中，光源结构200主要包含基板210以及多个光源群组220。基板210具有第一侧边211以及与第一侧边211垂直的第二侧边212。其中，第一侧边211沿着第一方向D1延伸，第二侧边212沿着第二方向D2延伸，且第一方向D1垂直于第二方向D2。如图3所示，在本实施例中，光源群组220沿着第一方向D1与第二方向D2阵列。在一实施例中，光源群组220呈等间距地排列在基板210上，且任意两个相邻的光源群组220之间具有间距S1。
请再次参照图3，在本实施例中，每一个光源群组220包含多个发光单元221，且每一个光源群组220中的发光单元221沿着圆形轨迹排列成正多边形。其中，每一个光源群组220中的任意两个相邻的发光二极管221之间的连线不平行于第一侧边211或第二侧边212。在图3的实施例中，每一个光源群组220中的发光单元221排列成正方形，且正方形的任一边长均不与第一侧边211或第二侧边212平行。更详言之，多个发光单元221的排列尽可能不与显示器的边缘(也就是前述基板210的第一侧边211或第二侧边212)平行。如此，在视觉效果上，用户较不易发现光源排列规律的亮带。在一实施例中，在每一个光源群组220中，沿着圆形轨迹的任意两个相邻的发光单元221之间具有第一距离A1。每一个光源群组220的全部发光单元221的中心(也就是每一光源群组220所属的圆形轨迹的圆心位置)与相邻的光源群组220的全部发光单元221的中心之间 的距离界定为间距S1。其中，光源群组220的任一发光单元221与相邻的光源群组220的最靠近前述任一发光单元221的发光单元221之间的距离界定为第二距离A2。换言之，任意两个相邻的光源群组220中最靠近的发光单元221之间的距离为第二距离A2。在本实施例中，第二距离A2小于第一距离A1。借助于此设计，光源结构200可产生较好的均光效果。在一些实施例中，第一距离A1的长度小于任意两个相邻的光源群组220之间的间距S1的一半。
请一并参照图4，图4为使用本发明的第一实施方式的光源结构的亮度仿真图。从图4中可看出，相较于图1的现有的光源结构100，通过将发光单元221沿着圆形轨迹所排列成的正多边形旋转一定角度，便能使得任意两个相邻的光源群组220中的最靠近的发光单元221之间的距离(例如第二距离A2)在第一方向D1及/或第二方向D2上缩短，由此设计成小于每一个光源群组220中的任意两个相邻的发光单元221之间的第一距离A1，进而缩小图3的光源结构200的暗带的宽度W3与宽度W4。也就是说，图4的深色区域的面积明显小于图2的深色区域的面积，且图4的深浅色的明暗对比小于图2所示的深浅色的明暗对比，这表明图4的发光较为均匀。因此，将本实施方式的光源结构200应用于背光模组中并搭配光学膜片使用时，可产生整体较均匀的外观。
要说明的是，在每一个光源群组220中，发光单元221虽然沿着圆形轨迹排列成正多边形，但此正多边形的任一边均不平行于基板210的第一侧边211或第二侧边212。在一实施例中，如图3所示，任意两个相邻的圆形轨迹的圆心之间具有第一连线B1，且每一个光源群组220中的任一个发光单元221与其对应的圆形轨迹的圆心之间具有第二连线B2。其中，第一连线B1与第二连线B2之间的夹角θ1不等于180度除以正多边形的边长数。以图3为例，发光单元221沿着圆形轨迹排列成正方形，故夹角θ1不等于180度除以4(也就是45度)，这是为了排除经旋转后的光源群组中的发光单元221产生习知矩形阵列的排列情况。因此，在每一个光源群组220中，在确定发光单元221沿着圆形轨迹所排列的正多边形的边长数的情况下，夹角θ1可依据使用者的需求来决定，进而决定发光单元221沿 着圆形轨迹排列成的正多边形的旋转角度。
要说明的是，以四边形排列的光源群组220为例，每一个光源群组220中的任一个发光单元221与其对应的圆形轨迹的圆心之间具有第三距离A3(也就是圆形轨迹的半径)，为了满足发光单元221经旋转而不重叠的前提下，任意两个相邻的光源群组220之间的间距S1应超过第三距离A3的长度的2倍。另一方面，为了避免相邻的光源群组220之间出现较大的暗带，任意两个相邻的光源群组220之间的间距S1不应大于第三距离A3的长度的3.5倍。也就是说，在每一个光源群组220中，圆形轨迹的半径(第三距离A3)与相邻的光源群组220之间的间距S1的关系可以用关系式3.5A3≧S1>2A3来表示。如此，可以确保本实施方式的光源结构200在应用于背光模组中并搭配光学膜片使用时，使背光模组整体产生较均匀的外观。
要说明的是，图3的实施例中的光源群组220的发光单元221沿着圆形轨迹排列成正方形仅用以示范说明。在其他实施例中，每一个光源群组中的发光单元亦可排列成不同形状。请参照图5所示，其为绘示依照本发明的第二实施方式的光源结构的装置示意图。图5所示的光源结构300同样包含基板310以及多个光源群组320。基板310具有第一侧边311以及第二侧边312。其中，第一侧边311沿着第一方向D1延伸，第二侧边312沿着第二方向D2延伸，且第一方向D1垂直于第二方向D2。在本实施例中，光源群组320沿着第一方向D1与第二方向D2阵列。在一实施例中，光源群组320呈等间距地排列在基板310上，且任意两个相邻的光源群组320之间具有间距S2。
请再次参照图5，在本实施例中，每一个光源群组320包含多个发光单元321。在图5的实施例中，每一个光源群组320中的发光单元321沿着圆形轨迹排列成正三角形。在一实施例中，在每一个光源群组320中，沿着圆形轨迹的任意两个相邻的发光单元321之间具有第一距离A4。此外，任意两个相邻的光源群组320中最靠近的发光单元321之间具有第二距离A5。在本实施例中，第二距离A5小于第一距离A4。借助于此设计，光源结构300同样可以缩小光源群组320之间的暗带，产生良好的均 光效果。
同样地，在每一个光源群组320中，发光单元321虽然沿着圆形轨迹排列成正三角形，但此正三角形的任一边均不平行于基板310的第一侧边311或第二侧边312。在图5所示的实施例中，任意两个相邻的圆形轨迹的圆心之间具有第一连线B3，且每一个光源群组320中的任一个发光单元321与其对应的圆形轨迹的圆心之间具有第二连线B4。其中，第一连线B3与第二连线B4之间的夹角θ2不等于180度除以正三角形的边长数(也就是60度)。因此，在每一个光源群组320中，在确定发光单元321沿着圆形轨迹所排列的正多边形的边长数的情况下，使用者可通过改变夹角θ2来决定发光单元321沿着圆形轨迹排列成的正多边形的旋转角度。
要说明的是，前述实施例虽然以发光单元分别排列成正方形以及正三角形为例进行了说明，但这并非用以限制本发明。也就是说，在其他实施例中，发光单元亦可排列成其他正多边形，例如正五边形、正六边形、正七边形等。
另请参照图6，其为绘示依照本新型的实施方式的显示装置的装置示意图。本实施方式的显示装置400包含背光模组410及显示面板420。背光模组410包含如图3所示的光源结构200以及设置在光源结构200上方的至少一个光学膜片411。如图6所示，显示面板420设置在背光模组410的前方，故光源结构200产生的光线经过光学膜片411后可射入显示面板420中，以从显示面板420出光。要说明的是，本实施例以图3所示的光源结构200应用于显示装置中仅用以示范说明，并非用以限制本发明。前述其他实施例的的光源结构，例如图5所示的光源结构300亦可应用于显示装置中，并能够产生同样的效果。
由上述本发明实施方式可知，本发明改变了光源结构的原有设计规则，通过将多个发光单元建构成一个光源群组后，再将这些光源群组阵列于基板上，同时使得相邻的光源群组之间最近的两个发光单元之间的距离小于光源群组中沿着圆形轨迹的相邻的发光单元的距离，从而能够缩减整体光源结构发光面的暗带宽度，提升背光模组的均匀度。
虽然本发明的实施例已陈述如上，然而其并非用以限定本发明。任何 本领域技术人员在不脱离本发明的精神和范围内，应当可以做出些许更动与润饰。故本发明的保护范围应当以所附的权利要求书所界定的范围为准。
【附图标记列表】
100   光源结构
110   基板
120   发光二极管
200   光源结构
210   基板
211   第一侧边
212   第二侧边
220   光源群组
221   发光单元
300   光源结构
310   基板
311   第一侧边
312   第二侧边
320   光源群组
400   显示装置
410   背光模组
411   光学膜片
420   显示面板
321   发光单元
A1    第一距离
A2    第二距离
A3    第三距离
A4    第一距离
A5    第二距离
B1    第一连线
B2   第二连线
B3   第一连线
B4   第二连线
D1   第一方向
D2   第二方向
S1   间距
W1   宽度
W2   宽度
W3   宽度
W4   宽度
θ1  夹角
θ2  夹角。

Claims (10)

  1. 一种光源结构，包含：
    基板；以及
    多个光源群组，其阵列于所述基板上，其中每一所述光源群组包含多个发光单元，每一所述光源群组中的任意两个相邻的发光单元之间具有第一距离，且任意两个相邻的所述光源群组中的最靠近的所述发光单元之间具有第二距离；
    其中，所述第二距离小于所述第一距离。
  2. 根据权利要求1所述的光源结构，其中，
    所述光源群组呈等间距排列，且所述第一距离小于相邻的所述光源群组之间的间距的一半。
  3. 根据权利要求2所述的光源结构，其中，
    每一所述光源群组中的所述发光单元排列成正方形。
  4. 根据权利要求1所述的光源结构，其中，
    每一所述光源群组中的所述发光单元沿着圆形轨迹排列成正多边形。
  5. 根据权利要求4所述的光源结构，其中，
    所述圆形轨迹的半径与相邻的所述光源群组之间的间距的关系式为3.5A3≧S1>2A3，其中A3为所述半径，S1为所述间距。
  6. 根据权利要求4所述的光源结构，其中，
    所述基板具有沿着第一方向延伸的第一侧边以及与沿着第二方向延伸的第二侧边，其中，所述第一侧边垂直于所述第二侧边；以及
    所述光源群组沿着所述第一方向与所述第二方向阵列。
  7. 根据权利要求6所述的光源结构，其中，
    每一所述光源群组中的任意两个相邻的发光单元之间的连线不平行于所述第一侧边或所述第二侧边。
  8. 根据权利要求1所述的光源结构，其中，
    每一所述光源群组中的所述发光单元沿着圆形轨迹排列成正多边形，其中，所述正多边形具有边长数，且所述圆形轨迹具有圆心；以及
    任意两个相邻的所述圆形轨迹的所述圆心之间具有第一连线，每一所述光源群组中的所述发光单元的任一者与对应的所述圆形轨迹的所述圆心之间具有第二连线，其中，所述第一连线与所述第二连线的夹角不等于180度除以所述边长数。
  9. 一种背光模组，包含：
    根据权利要求1至8中任一项所述的光源结构；以及
    至少一个光学膜片，其设置在所述光源结构的上方。
  10. 一种显示装置，包含：
    根据权利要求9所述的背光模组；以及
    显示面板，其设置在所述背光模组的前方。
PCT/CN2019/106658 2019-09-19 2019-09-19 光源结构、背光模组及显示装置 WO2021051347A1 (zh)

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