WO2018126675A1 - 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
WO2018126675A1
WO2018126675A1 PCT/CN2017/096038 CN2017096038W WO2018126675A1 WO 2018126675 A1 WO2018126675 A1 WO 2018126675A1 CN 2017096038 W CN2017096038 W CN 2017096038W WO 2018126675 A1 WO2018126675 A1 WO 2018126675A1
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WO
WIPO (PCT)
Prior art keywords
backlight module
positioning
light guide
guide plate
optical film
Prior art date
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PCT/CN2017/096038
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English (en)
French (fr)
Inventor
马永达
吴新银
乔勇
Original Assignee
京东方科技集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to AU2017391512A priority Critical patent/AU2017391512B2/en
Priority to US15/766,144 priority patent/US10502892B2/en
Priority to MX2018011391A priority patent/MX2018011391A/es
Priority to RU2018132182A priority patent/RU2722474C1/ru
Priority to KR1020187026855A priority patent/KR102085207B1/ko
Priority to EP17857635.1A priority patent/EP3567300B1/en
Priority to BR112018068570-4A priority patent/BR112018068570B1/pt
Priority to JP2018548445A priority patent/JP7001610B2/ja
Publication of WO2018126675A1 publication Critical patent/WO2018126675A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels

Definitions

  • Embodiments of the present disclosure relate to the field of display technologies, and in particular, to a backlight module and a display device.
  • the backlight module is one of the key components of the liquid crystal display device.
  • the basic principle is to convert the point source or the line source into a high-brightness and uniform surface light source, so that the liquid crystal panel can display images normally.
  • the tolerance accumulation of the plurality of fixing members provided on the back plate and the plastic frame may also cause the light guide plate or the film to be displaced, thereby affecting the picture quality.
  • Embodiments of the present disclosure provide a backlight module and a display device to reduce the generation of debris and avoid the offset of the light guide plate and the optical film.
  • An embodiment of the present disclosure provides a backlight module, including: a backboard, wherein the backplane has at least one positioning structure disposed on an inner side thereof, each positioning structure includes at least one positioning post, each positioning post includes a body and a covering And a light guide plate, wherein the light guide plate is provided with a groove matching the at least one positioning structure, and an inner wall of the groove is in contact with the soft sleeve of the body.
  • the backlight module further includes an optical film, wherein the optical film is provided with a notch that mates with the at least one positioning structure.
  • the body is cylindrical and the shape of any cross section in a plane parallel to the bottom plate is the same and the same size.
  • the body is stepped cylindrical and includes a first portion proximate the light guide plate and a second portion proximate the optical film, the orthographic projection of the first portion in a plane parallel to the backplane floor An orthographic projection greater than the second portion in a plane parallel to the backplane floor.
  • the body has a tapered shape, wherein the body is tapered in a direction from the light guide plate to the optical film.
  • the flexible sleeve is stepped and includes a first portion adjacent the end of the light guide plate and a second portion adjacent the optical film, the thickness of the first portion being greater than a direction perpendicular to the bottom plate The thickness of the second part.
  • the shape of the section of the body in a plane parallel to the bottom plate is a regular geometry.
  • the geometry of the rule is one of an ellipse, a circle, and a regular polygon.
  • each of the positioning structures further includes a soft pad, the soft pad is coupled to the bottom plate of the back plate, and the soft sleeve of the at least one positioning post is integral with the soft pad .
  • the bottom plate of the backing plate has a protrusion, and the soft pad is provided with a hole that is assembledly coupled to the protrusion.
  • the bottom plate of the backing plate has a groove
  • the soft pad has a projection that is assembledly coupled to the groove
  • the soft sleeve is a rubber boot and the soft pad is a rubber pad.
  • the at least one positioning post includes a plurality of positioning posts, wherein the plurality of positioning posts are in a straight line.
  • the at least one positioning structure is at least two, and the at least two positioning structures are distributed on two opposite non-light-in sides of the backboard.
  • the embodiment of the present disclosure further provides a display device, including the foregoing backlight module.
  • FIG. 1 is a schematic structural view of a backlight module
  • FIG. 2 is a schematic cross-sectional view of a backlight module
  • FIG. 3 is a schematic structural diagram of a positioning structure according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural view of a positioning structure according to another embodiment of the present disclosure.
  • FIG. 5 is a top plan view of a light guide plate and an optical film according to an embodiment of the present disclosure.
  • the side-in-light backlight module includes a backboard 11 including a bottom plate and a side wall surrounding a receiving space, and further includes a receiving space in the receiving space of the backing plate 11 and The reflective sheet 12, the light guide plate 13, and the optical film 14 are placed.
  • the backlight module further includes: a light source 15 between the side wall of the back plate 11 and the light incident surface of the light guide plate 13, and a plastic frame 16 on the front side of the optical film 14 and connected to the back plate 11, the back plate 11
  • the inner side of the bottom plate has a positioning post 17
  • the inner side of the front wall of the plastic frame 16 has a positioning protrusion 18
  • the light guide plate 13 has a groove matching with the positioning post 17
  • the optical film 14 has a positioning post 17 matched with the back plate 11 .
  • the first notch and the second notch cooperate with the positioning protrusion 18 of the plastic frame 16.
  • the embodiments of the present disclosure provide a backlight module and a display device, which can reduce the generation of debris of the light guide plate and avoid the deviation of the light guide plate and the optical film.
  • a backlight module includes a back plate 21 and a light guide plate 22 , wherein at least one positioning structure 24 is disposed on the inner side of the bottom plate of the back plate 21 , and each positioning structure 24 is provided. At least one positioning post is included, each positioning post including a body 241 and a soft sleeve 242 wrapped around the body 241.
  • the light guide plate 22 has a recess 23 that cooperates with the positioning structure 24, and the inner wall of the recess 23 is in contact with the soft sleeve 242 of the body 241.
  • the recess 23 is, for example, a through hole for the positioning structure 24 to pass through the recess 23.
  • a groove 23 may be separately provided for each positioning structure; when the distance between the two positioning structures 24 is small, a common groove 23 may be provided, as shown in FIG. It can be understood that the position of the groove 23 depends on the position of the positioning structure 24, and may be disposed at the outer peripheral edge of the light guide plate (as shown in FIG. 3) or at the four corners or other positions of the light guide plate.
  • the recess 23 includes three side walls 23a, 23b and 23c, and at least one side wall 23c is in contact with the soft sleeve 242. In other embodiments, at least two of the side walls 23a, 23b are in contact with the soft sleeve 242 or each side wall is in contact with the soft sleeve 242.
  • the light guide plate 22 in the backlight module is in elastic contact with the soft sleeve 242, which can prevent the chip from being generated due to the hard contact between the light guide plate and the fixing member, thereby improving the picture effect;
  • the backlight module uses the positioning structure 24 to simultaneously position the light guide plate 22 and the optical film 25, which reduces the number of the positioning structures 24 and improves the number of the light guide plates and the optical film 25 by different fixing members.
  • the tolerance of the positioning structure 24 is accumulated to avoid offset of the light guide plate and the optical film.
  • the backlight module further includes an optical film, wherein the optical film is provided with a notch that cooperates with the positioning structure 24, and the position of the notch can be designed with reference to the position and number of the grooves on the light guide plate.
  • the optical film 25 is provided with a notch 250 which can be assembled to the upper surface of the light guide plate 22 shown in FIG. 3 and corresponds to the position of the groove on the light guide plate 22.
  • the soft sleeve of the body is in contact with the inner wall of the notch 250 of the optical film 25, achieving elastic contact between the optical film 25 and the flexible sleeve 242, thereby preventing the optical film from being fixed. Hard contact of the device.
  • the body 241 is cylindrical, and the body 241 has the same shape and the same size in any cross section in a plane parallel to the bottom plate of the backing plate 21.
  • the shape of the section of the body 241 in a plane parallel to the bottom plate of the backing plate 21 includes regular geometric shapes, for example, elliptical, circular, positive Polygon (square or rectangular). Therefore, the columnar shape may be an elliptical cylinder, a cylinder, a prism (for example, a triangular prism, a quadrangular prism), or the like.
  • the shape of the section of the body 241 in a plane parallel to the bottom plate of the backing plate 21 may also be an irregular geometry.
  • the body is tapered, wherein the body is tapered in a direction from the light guide to the optical film.
  • the taper may be a cone, an elliptical cone or a pyramid (eg, a triangular pyramid, a quadrangular pyramid, etc.).
  • the body is tapered and has a flattened head to avoid collision or scratching with the device disposed on top of it.
  • the body 241 is stepped cylindrical and includes a first portion proximate the light guide plate and a second portion proximate the optical film, the first portion being in a plane parallel to the backplane floor
  • the orthographic projection is larger than the orthographic projection of the second portion in a plane parallel to the backplane floor.
  • the body 241 has a stepped cylindrical shape, including a thick column portion adjacent to the light guide plate 22 and a thin column portion close to the optical film 25, that is, the diameter of the first portion is larger than that of the second portion. diameter.
  • the optical film 25 of the backlight module can be disposed to protrude from the edge of the groove 23 of the light guide plate 22, which can effectively reduce the light leakage phenomenon of the backlight module at the groove 23 of the light guide plate 22.
  • the flexible sleeve 242 is in the shape of a stepped sleeve including a first portion 242a adjacent to the light guide plate 22 and a second portion 242b adjacent to the optical film (not shown in FIG. 3) at a bottom plate perpendicular to the back plate.
  • the thickness is greater than the thickness of the second portion 242b.
  • the optical film protrudes from the edge of the groove 23 of the light guide plate 22, which can effectively reduce the light leakage phenomenon of the backlight module at the groove 23 of the light guide plate 22.
  • each positioning structure 24 of the backlight module in this embodiment further includes a soft pad 243, and the soft pad 243 is connected to the bottom plate of the back plate 21.
  • the soft sleeve 242 of the at least one locating post and the soft pad 243 are of unitary construction.
  • the soft pad 243 can increase the friction between the light guide plate 22 and the back plate 21, thereby reducing the displacement of the light guide plate 22 relative to the back plate 21, and reducing the impact force of the light guide plate 22 on the body 241.
  • the specific manner of connecting the soft pad 243 to the bottom plate of the back plate 21 is not limited, and may be, for example, bonding or bolting.
  • the bottom plate of the back plate 21 has a protrusion (not shown), and the soft pad 243 has a hole 244 which is assembled and connected with the protrusion, and the connection mode is convenient for the soft lining.
  • the bottom plate of the backing plate 21 has a groove, and the soft pad 243 has a projection that is assembledly coupled to the groove.
  • the material of the soft sleeve 242 and the soft pad 243 is not limited, for example, the soft sleeve 242 may be a rubber sleeve.
  • the soft pad 243 may be a rubber pad.
  • the positioning post can be made of a rigid material such as a metal or an alloy.
  • the at least one positioning post includes a plurality of positioning posts, wherein the plurality of positioning posts are in a straight line.
  • the plurality of positioning posts have equal spacing between them (as shown in Figure 5).
  • each positioning structure 24 includes two positioning posts. Compared with each positioning structure 24 including a positioning post, the technical solution uses two positioning posts to facilitate the processing of the groove 23 of the light guide plate 22 and the notch 250 of the optical film 25; compared to each positioning structure 24 The positioning column, the technical solution is more economical to save production costs.
  • the specific number of the positioning structures 24 is not limited.
  • the positioning structures 24 are at least two, and at least two positioning structures 24 are distributed on two opposite non-light-in sides of the backboard 21 (for example, as shown in FIG. 1 ), thereby Further improve positioning accuracy.
  • An embodiment of the present disclosure further provides a display device including the backlight module of any of the foregoing embodiments.
  • the light guide plate 22 is elastically contacted with the soft sleeve 242 of the positioning structure 24 to prevent the light guide plate 22 from being chipped due to hard contact with the fixed structure, thereby reducing the generation of debris and improving.
  • the backlight module of the display module uses the positioning structure 24 to simultaneously position the light guide plate 22 and the optical groove, thereby reducing the number of the positioning structures 24 and reducing the tolerance accumulation of the plurality of positioning structures 24.
  • the specific type of the display device is not limited, and may be, for example, a liquid crystal television, a liquid crystal display device, a digital photo frame, an electronic paper, a mobile phone, or the like.

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

Abstract

一种背光模组及显示装置。背光模组包括背板(21)，背板(21)的底板内侧设置有至少一个定位结构(24)，每个定位结构(24)包括至少一个定位柱，每个定位柱包括本体(241)以及包覆于本体(241)的软质套(242)；以及导光板(22)，导光板(22)设有与至少一个定位结构(24)相配合的凹槽(23)，凹槽(23)的内壁与本体(241)的软质套(242)接触。背光模组可减少导光板(22)上碎屑的产生，避免导光板(22)和光学膜片(25)的偏移。

Description

背光模组及显示装置
相关申请的交叉引用
本申请基于并且要求于2017年1月5日递交的中国专利申请第201720013966.8号的优先权，在此全文引用上述中国专利申请公开的内容。
技术领域
本公开实施例涉及显示技术领域，特别是涉及一种背光模组及显示装置。
背景技术
背光模组是液晶显示装置的关键部件之一，其基本原理是将点光源或线光源转化为高亮度且均匀性较好的面光源，从而使液晶面板能够正常显示影像。
现有背光模组在运输过程中，由于导光板与位于其上的固定件为硬性接触，因此极易因摩擦而产生碎屑，该碎屑进入导光板与光学膜片之间，会影响到画面效果；此外，背板和胶框上所设置的多个固定件的公差累积还会导致导光板或膜材的偏移，从而影响画面质量。
发明内容
本公开实施例提供一种背光模组及显示装置，以减少碎屑的产生，避免导光板和光学膜片的偏移。
本公开实施例提供了一种背光模组，包括：背板，所述背板的底板内侧设置有至少一个定位结构，每个定位结构包括至少一个定位柱，每个定位柱包括本体以及包覆于本体的软质套；以及导光板，所述导光板设有与所述至少一个定位结构相配合的凹槽，所述凹槽的内壁与所述本体的软质套接触。
一个示例中，背光模组还包括光学膜片，其中，所述光学膜片设有与所述至少一个定位结构相配合的缺口。
一个示例中，所述本体呈柱状，在平行于所述底板的平面内的任意截面的形状相同且大小相同。
一个示例中，所述本体呈阶梯柱状并且包括靠近所述导光板的第一部分和靠近所述光学膜片的第二部分，所述第一部分在平行于所述背板底板的平面内的正投影大于所述第二部分在平行于所述背板底板的平面内的正投影。
一个示例中，所述本体呈锥状，其中所述本体沿从所述导光板到所述光学膜片的方向为逐渐缩小。
一个示例中，所述软质套呈阶梯套状并且包括靠近导光板端的第一部分和靠近所述光学膜片的第二部分，在垂直于所述底板的方向上，所述第一部分的厚度大于第二部分的厚度。
一个示例中，所述本体在平行于所述底板的平面内的截面的形状为规则的几何形状。
一个示例中，规则的几何形状为椭圆形、圆形和正多边形之一。
一个示例中，每个定位结构还包括软质衬垫，所述软质衬垫与所述背板的底板连接，所述至少一个定位柱的软质套与所述软质衬垫为一体结构。
一个示例中，所述背板的底板具有凸起，所述软质衬垫设有与所述凸起装配连接的孔。
一个示例中，所述背板的底板具有凹槽，所述软质衬垫具有与所述凹槽装配连接的凸起。
一个示例中，所述软质套为橡胶套，所述软质衬垫为橡胶衬垫。
一个示例中，所述至少一个定位柱包括多个定位柱，其中多个定位柱位于一条直线上。
一个示例中，所述至少一个定位结构为至少两个，所述至少两个定位结构分布于背板的两个相对的非入光侧。
本公开实施例还提供了一种显示装置，包括前述的背光模组。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。
图1为背光模组的结构示意图；
图2为背光模组的截面示意图；
图3为本公开一实施例的定位结构的结构示意图；
图4为本公开另一实施例的定位结构的结构示意图；
图5为本公开一实施例的导光板和光学膜片的俯视图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另作定义，此处使用的技术术语或者科学术语应当为本发明所属领域内具有一般技能的人士所理解的通常意义。本公开专利申请说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现在“包括”或者“包含”前面的元件或者物件涵盖出现在“包括”或者“包含”后面列举的元件或者物件及其等同，并不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
如图1和图2所示，侧入光式背光模组，包括背板11，该背板包括围成一容纳空间的底板和侧壁，还包括位于背板11的容置空间内并依次放置的反射片12、导光板13和光学膜片14。背光模组还包括：位于背板11的侧壁与导光板13的入光面之间的光源15，以及位于光学膜片14的前侧并与背板11连接的胶框16，背板11的底板内侧具有定位柱17，胶框16的前壁内侧具有定位凸起18，导光板13具有与定位柱17相配合的凹槽，光学膜片14具有与背板11的定位柱17相配合的第一缺口，以及与胶框16的定位凸起18相配合的第二缺口。
本公开实施例提供了一种背光模组及显示装置，可以减少导光板的碎屑的产生，避免导光板和光学膜片的偏移。
如图3和图4所示，本公开一实施例提供的背光模组，包括背板21和导光板22，其中，背板21的底板内侧设置有至少一个定位结构24，每个定位结构24包括至少一个定位柱，每个定位柱包括本体241以及包覆于本体241的软质套242。导光板22具有与定位结构24相配合的凹槽23，所述凹槽23的内壁与所述本体241的软质套242接触。该凹槽23例如为通孔，为了使定位结构24从凹槽23中穿出。当两个定位结构24间距较大时，可以给每个定位结构分别设置一个凹槽23；当两个定位结构24间距较小时，可以设置共用的凹槽23，如图3所示。可以理解的是，凹槽23的位置取决于定位结构24的位置，既可以设置在导光板的外周边缘(如图3所示)，也可以设置在导光板的四角或其他位置。
本实施例中，凹槽23包括三个侧壁23a、23b和23c，至少一个侧壁23c与软质套242相接触。在其他实施例中，至少两个侧壁23a、23b与软质套242相接触或者每个侧壁均与软质套242相接触。
上述本公开实施例中，该背光模组中的导光板22与软质套242弹性接触，可以防止因导光板与固定件的硬性接触而产生碎屑的现象，从而改善了画面效果；此外，该背光模组采用定位结构24同时定位导光板22和光学膜片25，相比于通过不同固定件分别固定导光板和光学膜片25来说，减少了定位结构24的数量，改善了多个定位结构24的公差累积，避免导光板和光学膜片的偏移。
至少一些实施例中，背光模组还包括光学膜片，其中光学膜片设有与定位结构24相配合的缺口，该缺口的位置可参照导光板上的凹槽的位置和数量设计。如图5所示，光学膜材25上设置有一个缺口250，该光学膜材可组装到图3所示的导光板22的上表面，并与导光板22上的凹槽的位置相对应。这样，从导光板22表面露出的定位结构24穿过光学膜片25。在一个示例中，所述本体的软质套与光学膜材25的缺口250的内壁相接触，实现了光学膜片25和与软质套242之间的弹性接触，从而防止光学膜片与固定装置的硬性接触。
至少一些实施例中，本体241呈柱状，本体241在平行于背板21底板的平面内的任意截面的形状相同且大小相同。例如，本体241在平行于背板21底板的平面内的截面的形状包括规则的几何形状，例如，椭圆形、圆形、正 多边形(正方形或长方形)。因此，所述柱状可以是椭圆柱、圆柱、棱柱(例如三棱柱、四棱柱)等。在其他实施例中，本体241在平行于背板21底板的平面内的截面的形状还可以是不规则的几何形状。
至少一些实施例中，本体呈锥状，其中所述本体沿从所述导光板到所述光学膜片的方向是逐渐缩小的。例如，所述锥状可以是圆锥、椭圆锥或棱锥(例如三棱锥、四棱锥等)。一个示例中，所述本体为锥形且具有平头，这样避免和设置在其顶部的器件碰撞或划伤。
至少一些实施例中，本体241呈阶梯柱状，并且包括靠近所述导光板的第一部分和靠近所述光学膜片的第二部分，所述第一部分在平行于所述背板底板的平面内的正投影大于所述第二部分在平行于所述背板底板的平面内的正投影。例如，本实施例中，本体241呈阶梯圆柱状，包括与靠近导光板22的粗柱部和与靠近光学膜片25的细柱部，即所述第一部分的直径大于所述第二部分的直径。另外，可以将背光模组的光学膜片25设置为伸出导光板22的凹槽23的边缘，可以有效减少背光模组在导光板22凹槽23处的漏光现象。
如图3所示，软质套242呈阶梯套形状，包括靠近导光板22的第一部分242a和靠近光学膜片(图3中未示出)的第二部分242b，在垂直于背板的底板的方向上，第一部分242a的厚度大于第二部分242b的厚度。本技术方案中，光学膜片伸出导光板22的凹槽23的边缘，可以有效减少背光模组在导光板22的凹槽23处的漏光现象。
如图4所示，本实施例中背光模组的每个定位结构24还包括软质衬垫243，软质衬垫243与背板21的底板连接。
至少一些实施例中，至少一个定位柱的软质套242与软质衬垫243为一体结构。该软质衬垫243可以增加导光板22和背板21之间的摩擦力，从而减少导光板22相对于背板21的位移，降低导光板22对本体241的冲击力。
软质衬垫243与背板21的底板连接的具体方式不限，例如，可以为粘接或螺栓连接。如图4所示，在本实施例中，背板21的底板具有凸起(图中未示出)，软质衬垫243具有与凸起装配连接的孔244，该连接方式便于软质衬垫243的拆装。在本公开的另一实施例中，背板21的底板具有凹槽，软质衬垫243具有与凹槽装配连接的凸起。
软质套242和软质衬垫243的材料不限，例如软质套242可以为橡胶套， 软质衬垫243可以为橡胶衬垫。定位柱可以由刚性材料制成，例如金属或合金。
至少一些实施例中，所述至少一个定位柱包括多个定位柱，其中多个定位柱位于一条直线上。例如，所述多个定位柱之间具有相等的间距(如图5所示)。在本实施例中，每个定位结构24包括两个定位柱。相比每个定位结构24包括一个定位柱，该技术方案采用两个定位柱，便于导光板22的凹槽23和光学膜片25的缺口250的加工；相比每个定位结构24包括多个定位柱，该技术方案更节约生产成本。
定位结构24的具体数量不限，例如，定位结构24至少为两个，至少两个定位结构24分布于背板21的两个相对的非入光侧(例如，如图1所示)，从而进一步提高定位精确性。
本公开实施例还提供了一种显示装置，包括如前述任一实施例的背光模组。
本实施例的显示装置中，导光板22与定位结构24的软质套242弹性接触，防止导光板22因与固定结构的硬性接触而产生碎屑的现象，从而减少了碎屑的产生，改善了画面效果；此外，该显示模组的背光模组采用定位结构24同时定位导光板22和光学凹槽，从而减少了定位结构24的数量，减少了多个定位结构24的公差累积。
显示装置的具体类型不限，例如可以为液晶电视机、液晶显示器件、数码相框、电子纸、手机等。
以上所述仅是本公开的示范性实施方式，而非用于限制本公开的保护范围，本公开的保护范围由所附的权利要求确定。

Claims (15)

  1. 一种背光模组，包括：
    背板，所述背板的底板内侧设置有至少一个定位结构，每个定位结构包括至少一个定位柱，每个定位柱包括本体以及包覆于本体的软质套；和
    导光板，所述导光板设有与所述至少一个定位结构相配合的凹槽，所述凹槽的内壁与所述本体的软质套接触。
  2. 如权利要求1所述的背光模组，还包括光学膜片，其中，所述光学膜片设有与所述至少一个定位结构相配合的缺口。
  3. 如权利要求2所述的背光模组，其中，所述本体呈柱状，在平行于所述底板的平面内的任意截面的形状相同且大小相同。
  4. 如权利要求2所述的背光模组，其中，所述本体呈阶梯柱状并且包括靠近所述导光板的第一部分和靠近所述光学膜片的第二部分，所述第一部分在平行于所述背板底板的平面内的正投影大于所述第二部分在平行于所述背板底板的平面内的正投影。
  5. 如权利要求2所述的背光模组，其中，所述本体呈锥状，其中所述本体沿从所述导光板到所述光学膜片的方向为逐渐缩小。
  6. 如权利要求3或4所述的背光模组，其中，所述软质套呈阶梯套状并且包括靠近导光板端的第一部分和靠近所述光学膜片的第二部分，在垂直于所述底板的方向上，所述第一部分的厚度大于第二部分的厚度。
  7. 如权利要求1所述的背光模组，其中，所述本体在平行于所述底板的平面内的截面的形状为规则的几何形状。
  8. 如权利要求1所述的背光模组，其中，所述规则的几何形状为椭圆形、圆形和正多边形之一。
  9. 如权利要求1至8任一项所述的背光模组，其中，每个定位结构还包括软质衬垫，所述软质衬垫与所述背板的底板连接，所述至少一个定位柱的软质套与所述软质衬垫为一体结构。
  10. 如权利要求9所述的背光模组，其中，所述背板的底板具有凸起，所述软质衬垫设有与所述凸起装配连接的孔。
  11. 如权利要求9所述的背光模组，其中，所述背板的底板具有凹槽， 所述软质衬垫具有与所述凹槽装配连接的凸起。
  12. 如权利要求9所述的背光模组，其中，所述软质套为橡胶套，所述软质衬垫为橡胶衬垫。
  13. 如权利要求1所述的背光模组，其中，所述至少一个定位柱包括多个定位柱，其中多个定位柱位于一条直线上。
  14. 如权利要求1所述的背光模组，其中，所述至少一个定位结构为至少两个，所述至少两个定位结构分布于背板的两个相对的非入光侧。
  15. 一种显示装置，包括如权利要求1至14任一项所述的背光模组。
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