WO2023178823A1 - 可维持反射片折边设计角度的背光模组及显示装置 - Google Patents

可维持反射片折边设计角度的背光模组及显示装置 Download PDF

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Publication number
WO2023178823A1
WO2023178823A1 PCT/CN2022/094244 CN2022094244W WO2023178823A1 WO 2023178823 A1 WO2023178823 A1 WO 2023178823A1 CN 2022094244 W CN2022094244 W CN 2022094244W WO 2023178823 A1 WO2023178823 A1 WO 2023178823A1
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WO
WIPO (PCT)
Prior art keywords
backlight module
light guide
reflective sheet
guide plate
angle
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PCT/CN2022/094244
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English (en)
French (fr)
Inventor
邓友渊
谌佩郁
杨宗勋
黄翰泽
萧弘伦
Original Assignee
瑞仪光电(南京)有限公司
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Publication of WO2023178823A1 publication Critical patent/WO2023178823A1/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
    • G02B6/0001—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
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • 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 invention generally relates to a backlight module, and more specifically, to a backlight module having a multi-folded reflective sheet and a display device using the backlight module.
  • Display panels and panel display devices using display panels have gradually become the mainstream of various display devices.
  • various panel display screens, household flat-screen TVs, flat-panel monitors for personal computers and laptop computers, display screens for mobile phones and digital cameras, etc. are all products that use a large number of display panels.
  • the market demand for liquid crystal display devices has grown significantly in recent years.
  • the designs of backlight modules used in liquid crystal display devices have become increasingly diversified.
  • Edge-type backlight modules on the market can usually be divided into side-type and direct-type according to the difference in the incident position of the light source, so as to provide a uniform surface light source for the liquid crystal display module installed on it.
  • Edge-type backlight modules usually include components such as a backplane, a light guide plate, a reflective sheet, and a plastic frame.
  • the light guide plate is placed in the accommodation space on the backplane, and between the sides of the light guide plate and the side walls of the backplane There is usually room left to accommodate other components or to provide thermal expansion margin during subsequent reliability testing.
  • the edge-type backlight module has a light source (such as an LED chip or a cold cathode fluorescent lamp CCFL) that is incident from the side of the light guide plate, and uses the light guide plate and reflective sheet to convert the side light source into a direction facing the liquid crystal display module.
  • a light source such as an LED chip or a cold cathode fluorescent lamp CCFL
  • the reflective sheet can be designed to have an integrally formed folding portion, which extends into the reserved space between the side wall of the back plate and the side of the light guide plate to reflect the light emitted from the side of the light guide plate. , to enhance the brightness of the luminous surface.
  • the disadvantage of such a reflective sheet design is that the folded edge portion of the reflective sheet extends into the reserved space between the light guide plate and the back plate, but is tilted toward the side wall of the back plate and cannot be close to the side of the light guide plate, so it is difficult to maintain.
  • the preset reflection angle causes problems such as uneven reflected light or bright lines near the edge of the light-emitting surface of the light guide plate.
  • the present invention proposes a novel backlight module structure, which is characterized in that at least two fold lines are provided on the edge of the reflective sheet of the backlight module, in conjunction with the limiters on the side walls of the back panel.
  • the design can maintain the preset reflection angle of the reflective sheet to achieve better optical taste.
  • One aspect of the present invention is to propose a backlight module, which includes a backplane with at least one side wall; a light guide plate that is disposed in the backplane, and there is a predetermined space between the light guide plate and the side wall of the backplane. leaving space; and a reflective sheet, which is disposed between the back plate and the light guide plate, the reflective sheet includes a substrate part, an extension part and a support part, the substrate part is located between the back plate and the light guide plate, the extension part And the support part is located in the reserved space, and at least a part of the support part is against the side wall of the back panel.
  • Another aspect of the present invention is to provide a display device, which includes the above-mentioned backlight module and a display panel disposed above the backlight module.
  • Figure 1 is a schematic cross-sectional view of a backlight module according to an embodiment of the present invention
  • Figure 2 is a schematic cross-sectional view of a backlight module according to another embodiment of the present invention.
  • FIG. 3 is a schematic cross-sectional view of a backlight module according to another embodiment of the present invention.
  • spatially related terms such as “under”, “below”, “lower”, “above”, “upper” and other spatially related terms may be used herein to describe the relationship between one element or feature and another for convenience of description. The relationship of one or more elements or features as illustrated in the drawings.
  • Readers can usually understand a term, at least in part, from its context.
  • the term “one or more” as used herein may be used in the singular to describe any feature, structure or characteristic, or may be used in the plural to describe a combination of features, structures or characteristics, depending at least in part on context.
  • terms such as “a,” “an,” “the,” or “the” may equally be understood to convey a singular usage or to convey a plural usage, depending at least in part on the context.
  • the term “based on” may be understood as not necessarily intended to convey an exclusive set of factors, but may allow for the presence of additional factors that are not necessarily explicitly described, again depending at least in part on the context.
  • the backlight module proposed by the present invention generally includes a backplane 1 , a light guide plate 2 and a reflective sheet 3 .
  • the back plate 1 can be a plate made of rigid materials such as metal, which has predetermined mechanical strength and supporting force.
  • the light guide plate 2 can be a plate structure made of a polymer transparent material, which can guide the side-incident light source to the light exit surface of the light guide plate through the principle of total reflection.
  • the reflective sheet 3 can be a white reflective film, which has high reflectivity and low transmittance, and can reflect the light from the bottom or side of the light guide plate 2 back into the light guide plate 2 .
  • the edge of the reflective sheet 3 can be concavely folded along the fold line to reflect lateral light leakage. The concave folding method will be described in detail later.
  • the light guide plate 2 is arranged in the accommodation space on the back plate 1 and is surrounded by the side walls 12 of the back plate 1 ( Figure 1 only shows one of the side walls 12 and a part of the light guide plate 2) , and there is a reserved space D between the light guide plate 2 and the side wall 12 .
  • other optical films may be provided on the light exit surface of the light guide plate 2, such as diffusion sheets, color conversion sheets, prism sheets and other components.
  • the back panel 1 can also be combined with a plastic frame. Since the above-mentioned components are not the focus of the present invention, these components will not be shown in the drawings of the present invention for the purpose of concise illustration and to avoid obscuring the focus of the present invention.
  • the edge of the reflective sheet 3 has more than two fold lines.
  • the reflective sheet 3 includes a substrate portion 31, an extension portion 32 and a support portion 33.
  • the first fold line L1 is located between the substrate portion 31 and the extension portion 32
  • the second fold line L1 is located between the substrate portion 31 and the extension portion 32
  • L2 is located between the extension part 32 and the support part 33 .
  • the substrate portion 31 is the main body of the reflective sheet 3 and is located between the back surface of the light guide plate 2 and the bottom 11 of the back plate 1 .
  • One end of the extension portion 32 is connected to the substrate portion 31 , and the other end extends into the reserved space D.
  • the reflective sheet 3 is preferably made of elastic material, and more preferably, the reflective sheet 3 is designed to be integrally formed. More specifically, the substrate portion 31 and the extension portion 32 of the reflection sheet 3 can be bent to form any angle, and the extension portion 32 and the support portion 33 can also be bent to form any angle. The elasticity of the reflection sheet 3 is used to extend the reflection sheet 3 . There is a supporting force between the part 32 and the supporting part 33.
  • the extension section 32 can be brought as close as possible to the side of the light guide plate 2 to maintain the preset reflection angle of the reflective sheet 3 relative to the light guide plate 2, thus having the ability to improve the light guide plate 2.
  • the positions of the first fold line and the second fold line of the reflective sheet 3 are also flexibly compatible and suitable for designs with different backlight module sizes or reserved space D sizes.
  • the extension portion 32 has a first surface 32a facing the light guide plate 2 and a second surface 32b facing the back plate 1, and the substrate portion 31 has a first angle ⁇ 1 relative to the first surface 32a of the extension portion 32,
  • the support part 33 has a second angle ⁇ 2 relative to the second surface 32 b of the extension part 32 , and the first angle ⁇ 1 is preferably greater than the second angle ⁇ 2 .
  • the extension part 32 and the support part 33 located in the reserved space D can be elastically bent to any first angle ⁇ 1 and second angle ⁇ 2 , and by pressing one end of the support part 33 against on the side wall 12 of the back panel 1 to achieve the effect of limiting and fixing.
  • pressing lines, rice lines or stitching lines can be made along the first folding line L1 or the second folding line L2, so that the base portion 31 and the extension portion 32 can be accurately folded later.
  • the first fold line L1 is a valley fold line
  • the second fold line L2 is a mountain fold line
  • the substrate portion 31 of the reflective sheet 3 is covered by the light guide plate 2
  • the extension portion 32 and the support portion 33 extend into Reserve a space D so that the elasticity of the reflective sheet 3 can be used to push the other end of the support portion 33 against the side wall 12 to provide support for the extension portion 32 .
  • the extension portion 32 can be as close as possible to the side of the light guide plate 2 , to maintain the preset reflection angle of the reflective sheet 3 relative to the light guide plate 2 to achieve better optical taste.
  • the first angle ⁇ 1 is preferably adapted to the angle between the bottom surface and the side surface of the light guide plate 2 , for example, 90 degrees.
  • the elasticity of the reflective sheet 3 maintains the support force between the extension part 32 and the support part 33 .
  • the first angle ⁇ 1 will be larger than the second angle ⁇ 2 and larger than 90 degrees.
  • the elasticity of the reflective sheet 3 is used to make the other end of the support part 33 press against the side wall 12 to provide support for the extended part 32 .
  • the extended part 32 of the reflective sheet 3 can be fixed and maintained at the optimal preset angle for reflecting light. , as in the conventional technology, the effect of reflecting light will not be reduced due to the tendency to tilt toward the side wall of the back panel 1 and change the reflection angle.
  • the height of the connection between the extension part 32 and the support part 33 in the reflective sheet 3 is preferably the same as the height of the top surface of the light guide plate 2 to ensure that the light leakage from the side of the light guide plate can be reflected back into the light guide plate. Maintain the brightness of the backlight module.
  • additional limiting members or features may be formed on the side walls 12 of the back panel 1 to help maintain the position of the support portion 33 of the reflective sheet 3 relative to the side walls 12 .
  • a convex portion 121 is formed on the side wall 12 of the back plate 1 , which protrudes toward the direction of the light guide plate 2 and can contact the support portion 33 .
  • the reflective sheet 3 is fixed at a specific first angle ⁇ 1 and a second angle ⁇ 2 , and at least a part of the support portion 33 of the fixed reflective sheet 3 contacts and abuts the convex portion 121 .
  • the height of the connection between the extending portion 32 of the reflective sheet 3 and the supporting portion 33 is preferably higher than the height of the position where the protruding portion 121 is located, so that the limiting effect of the protruding portion 121 can be better exerted.
  • the advantage of this design is that with the help of the protrusions 121 on the side wall 12 , the attachment material between the side wall 12 and the reflective sheet 3 can be omitted.
  • FIG. 2 is a schematic cross-sectional view of a backlight module according to another embodiment of the present invention.
  • the structure and components of the backlight module in this embodiment are substantially the same as those in the embodiment shown in FIG. 1 .
  • the difference is that a recess 121 a is formed on the side wall 12 of the back plate 1 shown in FIG. 2 .
  • the step difference on the side wall 12 of the back plate 1 is used to make one end of the supporting portion 33 of the reflective sheet 3 abut against the recessed portion.
  • the attachment material between the side wall 12 and the reflective sheet 3 can also be omitted.
  • the recess 121a of this embodiment can also ensure the space between the side wall 12 of the back plate 1 and the light guide plate 2, which is conducive to the convenience of installing other components.
  • FIG. 3 is a schematic cross-sectional view of a backlight module according to another embodiment of the present invention.
  • the structure and components of the backlight module in this embodiment are substantially the same as those in the embodiment shown in FIG. 2 .
  • the difference lies in the groove 121 b formed on the side wall 12 of the back plate 1 shown in FIG. 3 .
  • the end of the support portion 33 of the reflection sheet 3 can abut or be directly embedded in the groove 121 b to achieve the effect of fixing the extension portion 32 of the reflection sheet 3 and the support portion 33 .
  • the groove 121b is a plurality of holes or a whole channel on the surface of the side wall 12, and the end of the support part 33 can be embedded in the aforementioned groove 121b.
  • the adhesive material between them can also ensure that the end of the reflective sheet 3 has a more stable limiting effect relative to the back plate 1 .
  • the present invention adopts the design of at least two or more fold lines provided on the edge of the reflective sheet of the backlight module, combined with the limiting features such as convex portions, concave portions or grooves formed on the side walls of the back panel.
  • the limiting features such as convex portions, concave portions or grooves formed on the side walls of the back panel.
  • the present invention also provides a display device, which includes the backlight module described in any of the above embodiments, and a display panel disposed above the backlight module.

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Abstract

一种可维持反射片折边设计角度的背光模组和显示装置，背光模组包含：背板（1），其具有至少一个侧墙（12）；导光板（2），其设置在背板（1）中且导光板（2）与背板（1）的侧墙（12）之间具有预留空间（D）；以及反射片（3），其设置在背板（1）与导光板（2）之间，反射片（3）包含衬底部（31）、延伸部（32）以及支撑部（33），衬底部（31）位于背板（1）以及导光板（2）之间，延伸部（32）及支撑部（33）位于预留空间（D）内，且支撑部（33）的至少一部分抵靠于背板（1）的侧墙（12）。

Description

可维持反射片折边设计角度的背光模组及显示装置 技术领域
本发明大体上涉及背光模组，更具体而言，涉及具有多折边的反射片的背光模组以及使用该背光模组的显示装置。
背景技术
显示面板及使用显示面板的面板显示装置已渐渐成为各类显示装置的主流。例如各式面板显示屏、家用的平面电视、个人计算机及膝上型计算机的平板型监视器、移动电话及数字相机的显示屏等，均为大量使用显示面板的产品。特别是近年来液晶显示装置的市场需求大幅成长，为了应液晶显示装置在功能上及外观上的要求，液晶显示装置所使用的背光模组的设计也日趋多元化。
一般市场上常见的背光模组，依照其光源入射位置的差异，通常可区分为侧入式与直下式两种，借以为设置于其上的液晶显示模组提供均匀的面光源。侧入式背光模组通常包含背板、导光板、反射片以及胶框等元件，其中导光板设置在背板上的容置空间中，且导光板的侧边与背板的侧墙之间通常设有预留空间，以设置其他部件或是在后续的可靠度测试中提供热膨胀裕度。
侧入式背光模组，顾名思义，其光源(如LED晶粒或是冷阴极荧光灯管CCFL)从导光板的侧边入射，并借由该导光板与反射片将侧光源转换成朝向液晶显示模组的面光源。而反射片可设计成具有一体成形的折边部，该折边部延伸至前述背板的侧墙与导光板的侧边之间的预留空间中，来反射从导光板侧边射出的光，以提升发光面的辉度。然而，这样的反射片设计的缺点在于，反射片的折边部伸入导光板与背板之间的预留空间中却朝向背板侧墙倾斜而无法贴近导光板的侧边，因此不易维持预设的反射角度，造成反射光线不均匀或导光板出光面靠近边缘的位置产生亮线的问题。
发明内容
鉴于前述习知做法的缺点，本发明提出了一种新颖的背光模组结构，其特点在于在背光模组的反射片的边缘设置至少两个以上的折线，搭配背板侧墙上的限位设计，可以维持反射片预设的反射角度以达到较佳的光学品味的功效。
本发明的一个方面在于提出一种背光模组，其包含背板，其具有至少一个侧墙；导光板，其设置在该背板中，该导光板与该背板的侧墙之间具有预留空间；以及反射片，其设置在该背板与该导光板之间，该反射片包含衬底部、延伸部以及支撑部，该衬底部位于该背板以及该导光板之间，该延伸部及该支撑部位于该预留空间内，该支撑部的至少一部分抵靠于该背板的该侧墙。
本发明的另一方面在于提出一种显示装置，其包含上述背光模组以及设置在该背光模组的上方的显示面板。
本发明的这类目的与其他目的在阅者读过下文中以多种图示与附图所描述的较佳实施例的细节说明后应可变得更为明显。
附图说明
附图构成了本说明书的一部分，可使阅者对本发明实施例有进一步的了解。这些附图描绘了本发明一些实施例并连同本文描述一起说明了其原理。在这些附图中：
图1为根据本发明实施例的背光模组的截面示意图；
图2为根据本发明另一实施例的背光模组的截面示意图；以及
图3为根据本发明又一实施例的背光模组的截面示意图。
须注意，本说明书中的所有附图皆为图例性质，为了清楚与方便示出附图，图中的各部件在尺寸与比例上可能会被夸大或缩小地呈现，一般而言，图中相同的符号用来标示修改后或不同实施例中对应或类似的元件特征。
具体实施方式
现在将详细说明本发明的示例性实施例，其会参照附图标出所描述的特征以便阅者理解并实现技术效果。阅者将可理解，文中的描述仅通过例示的方式来进行，而非意欲要限制本案。本案的各种实施例和实施例中彼此不冲突的各种特征可以以各种方式来加以组合或重新设置。在不脱离本发明的精神与范畴的情况下，对本案的修改、等同物或改进对于本领域技术人员来说是可以理解的，并且旨在包含在本案的范围内。
阅者应能容易理解，本案中的「在…上」、「在…之上」和「在…上方」的含义应当以广义的方式来解读，以使得「在…上」不仅表示「直接在」某物「上」，而且还包括在某物「上」且其间有居间特征或层的含义，并且「在…之上」或「在…上方」不仅表示「在」某物「之上」或「上方」的含义，而且还可以包括其「在」某物「之上」或「上方」且其间没有居间特征或层(即，直接在某物上)的含义。
此外，诸如「在…之下」、「在…下方」、「下部」、「在…之上」、「上部」等空间相关术语在本文中为了描述方便可以用于描述一个元件或特征与另一个或多个元件或特征的关系，如在附图中所示出的。
阅者通常可以至少部分地从上下文中的用法理解术语。例如，至少部分地取决于上下文，本文所使用的术语「一或多个」可以用于以单数意义描述任何特征、结构或特性，或者可以用于以复数意义描述特征、结构或特性的组合。类似地，至少部分地取决于上下文，诸如「一」、「一个」、「该」或「所述」之类的术语同样可以被理解为传达单数用法或者传达复数用法。另外，术语「基于」可以被理解为不一定旨在传达排他性的因素集合，而是可以允许存在不一定明确地描述的额外因素，这同样至少部分地取决于上下文。
阅者更能了解到，当「包含」与/或「含有」等词用于本说明书时，其限定了所陈述的特征、区域、整体、步骤、操作、要素以及/或部件的存在，但并不排除一个或多个其他的特征、区域、整体、步骤、操作、要素、部件以及/或其组合的存在或添加的可能性。
现在请参照图1，其为根据本发明实施例的背光模组的截面示意图。 如图1所示，本发明所提出的背光模组大体上包含背板1、导光板2以及反射片3。背板1可为使用金属等刚性材料所制成的板体，其具有预定的机械强度与支撑力。导光板2可为高分子透明材质的板体结构，其可通过全反射原理将侧向入射的光源引导至导光板的出光面。反射片3可为白色的反射膜，其具有高反射率和低穿透率，可将来自导光板2底面或侧面的光反射回导光板2中。在本发明实施例中，反射片3的边缘可以沿着折线凹折来反射侧向的漏光，凹折方式详见后述。
在位置关系上，导光板2设置在背板1上的容置空间中，其四周被背板1的侧墙12所围绕(图1仅示出其中一个侧墙12以及导光板2的一部分)，且导光板2与侧墙12之间具有预留空间D。须注意，在实际的背光模组中，导光板2的出光面上可能还设置有其他光学膜片，如扩散片、色彩转换片、棱镜片等部件。此外，背板1还可与胶框组合。由于上述这些部件并非本发明重点，为了图示简明以及避免模糊本发明焦点的目的，这些部件在本发明图示中将不予示出。
本发明的特点之一在于反射片3的边缘具有两道以上的折线。以两个折线为例，如图1所示，反射片3包含衬底部31、延伸部32以及支撑部33，其中第一道折线L1位于衬底部31与延伸部32之间，第二道折线L2位于延伸部32与支撑部33之间。衬底部31为反射片3的主体，其位于导光板2的背面与背板1的底部11之间。延伸部32的一端与衬底部31连接，另一端则延伸至预留空间D中。支撑部33的一端与延伸部32连接，另一端(或是至少一部分)则抵靠在背板1的侧墙12上。更具体而言，在本发明实施例中，反射片3较佳地由弹性材质制成，更佳地是反射片3为一体成形的设计。更详言之，反射片3的衬底部31与延伸部32之间可以弯曲形成任意角度，以及延伸部32与支撑部33之间也可以弯曲形成任意角度，利用反射片3的弹性而使延伸部32与支撑部33之间具有支撑力道，如此，可使延伸段32尽可能地贴近导光板2的侧面，以维持反射片3相对于导光板2的预设反射角度，由此具有提升导光板2出光均匀度的功效。此外，反射片3的第一道折线与第二道折线的位置，还可弹性地兼容适用于具有不同背光模组尺寸或预留空间D大小的设计中。
在一实施例中，延伸部32具有朝向导光板2的第一表面32a以及朝向背板1的第二表面32b，衬底部31相对于延伸部32的第一表面32a具有第一角度θ 1，支撑部33相对于延伸部32的第二表面32b具有第二角度θ 2，第一角度θ 1较佳地大于第二角度θ 2。在实际的设置中，位于预留空间D中的延伸部32与支撑部33可以弹性地弯曲成任意的第一角度θ 1与第二角度θ 2，并通过将支撑部33的一端抵靠在背板1的侧墙12上的方式来实现限位以及固定的效果。在另一实施例中，可沿着第一道折线L1或第二道折线L2上做出压线、米线或骑缝线，以便于后续能够准确地凹折出位于衬底部31与延伸部32之间的第一道折线L1以及位于延伸部32与支撑部33之间的第二道折线L2。更详言之，第一道折线L1为谷折线，而第二道折线L2为山折线，从而使反射片3的衬底部31被导光板2覆盖，而延伸部32及支撑部33伸入于预留空间D内，以便利用反射片3的弹性使支撑部33的另一端顶抵侧墙12而对延伸部32提供支撑力道，如此，可使延伸段32尽可能地贴近导光板2的侧面，以维持反射片3相对于导光板2的预设反射角度以达到较佳的光学品味的功效。
为了达到反射来自导光板2的光的最佳效果，第一角度θ 1较佳地为适应导光板2的底面与侧面之间的夹角，例如90度。然而，在实际的设置中，通过反射片3的弹性来维持延伸部32与支撑部33之间的支撑力道，通常，第一角度θ 1会大于第二角度θ 2且大于90度。如此，利用反射片3的弹性使支撑部33的另一端顶抵侧墙12而对延伸部32提供支撑力道，反射片3的延伸部32可以被固定维持在其反射光线的最佳预设角度，不会如习知技术中因容易朝向背板1的侧墙倾斜而改变反射角度所导致的降低其反射光线的功效。
此外，反射片3中的延伸部32与支撑部33的连接处的高度较佳地与导光板2的顶面的高度相同，以确保导光板侧向漏光能够被反射回到导光板内，具有维持背光模组的辉度的功效。
在本发明中，背板1的侧墙12上可以形成额外的限位件或特征来帮助维持反射片3的支撑部33相对于侧墙12的位置。例如，如图1所示，背板1的侧墙12上形成有凸部121，其朝导光板2的方向凸出并可与支撑部 33接触。在反射片3的设置过程中，通过将支撑部33的一端抵靠在背板1侧墙12上的方式，反射片3的延伸部32与支撑部33会自然地在预留空间D中折成特定的第一角度θ 1与第二角度θ 2而固定，而固定后的反射片3的支撑部33的至少一部分与凸部121接触并抵靠在其上。此外，反射片3的延伸部32与支撑部33的连接处的高度较佳地高于凸部121所在位置的高度，如此较能发挥凸部121限位的效果。此设计的好处在于，借助于侧墙12上的凸部121，可省略侧墙12与反射片3之间的贴附材料。
现在请参照图2，其为根据本发明另一实施例的背光模组的截面示意图。如图2所示，此实施例中背光模组的结构以及元件与图1所示的实施例大致相同，其差异在于图2所示的背板1的侧墙12上形成有凹部121a。换句话说，不论是此实施例中的凹部121a还是前述的凸部121，其都是利用背板1的侧墙12上的段差，进而使反射片3的支撑部33的一端抵靠在凹部121a上，并在预留空间D中弹性地且自然地调整其位置，最终达到固定反射片3的延伸部32与支撑部33的效果。此设计的优点与图1实施例所示者相同，借助于侧墙12上的凹部121a，亦可省略侧墙12与反射片3之间的贴附材料，相较于图1的凸部121，本实施例的凹部121a还可以确保背板1的侧墙12与导光板2之间的空间，有利于预留其他部件的安装便利性。
现在请参照图3，其为根据本发明又一实施例的背光模组的截面示意图。如图3所示，此实施例中背光模组的结构以及元件与图2所示的实施例大致相同，其差异在于图3所示的背板1的侧墙12上形成有凹槽121b。在实施例中，反射片3的支撑部33的末端可以抵靠或是直接嵌入凹槽121b中来达到固定反射片3延伸部32与支撑部33的效果。举例而言，凹槽121b为侧墙12的表面上的多个孔或者一整条槽道，支撑部33的末端可嵌入前述凹槽121b，如此，不仅可省略侧墙12与反射片3之间的贴附材料，还可确保反射片3的末端相对于背板1具有更稳定的限位效果。
综合上述实施例，本发明通过设置在背光模组的反射片的边缘的至少两个以上折线的设计，并结合形成在背板的侧墙上的凸部、凹部或凹槽等限位特征，来达到维持反射片预设的反射角度的功效，并可弹性地兼容不 同的背光模组尺寸或预留空间大小，同时可以减少用于固定反射片折边的材料与相关制程。
除了前述实施例，本发明亦提出了一种显示装置，其包含上述任一实施例中所述的背光模组，以及设置在背光模组的上方的显示面板。
以上所述仅为本发明的较佳实施例，凡依本发明申请专利范围所做的均等变化与修饰，皆应属本发明的涵盖范围。
【附图标记列表】
1    背板
2    导光板
3    反射片
11   底部
12   侧墙
31   衬底部
32   延伸部
32a  第一表面
32b  第二表面
33   支撑部
121  凸部
121a 凹部
121b 凹槽
D    预留空间
L1   第一道折线
L2   第二道折线
θ 1  第一角度
θ 2  第二角度。

Claims (10)

  1. 一种可维持反射片折边设计角度的背光模组，包含：
    背板，其具有至少一个侧墙；
    导光板，其设置在所述背板中，所述导光板与所述背板的侧墙之间具有预留空间；以及
    反射片，其设置在所述背板与所述导光板之间，所述反射片包含衬底部、延伸部以及支撑部，所述衬底部位于所述背板以及所述导光板之间，所述延伸部及所述支撑部位于所述预留空间内，所述支撑部的至少一部分抵靠于所述背板的所述侧墙。
  2. 根据权利要求1所述的可维持反射片折边设计角度的背光模组，其中，所述延伸部具有朝向所述导光板的第一表面及朝向所述背板的第二表面，所述衬底部相对于所述延伸部的第一表面具有第一角度θ 1，所述支撑部相对于所述延伸部的第二表面具有第二角度θ 2，所述第一角度θ 1大于所述第二角度θ 2。
  3. 根据权利要求1所述的可维持反射片折边设计角度的背光模组，其中，所述背板的所述侧墙上具有凸部，所述支撑部的一部分抵靠在所述凸部上。
  4. 根据权利要求3所述的可维持反射片折边设计角度的背光模组，其中，所述延伸部与所述支撑部的连接处的高度高于所述凸部所在位置的高度。
  5. 根据权利要求1所述的可维持反射片折边设计角度的背光模组，其中，所述背板的所述内侧面上具有凹槽，所述延伸部的末端抵靠在所述凹槽上。
  6. 根据权利要求5所述的可维持反射片折边设计角度的背光模组，其中，所述延伸部与所述支撑部的连接处的高度高于所述凹槽所在位置的高度。
  7. 根据权利要求1所述的可维持反射片折边设计角度的背光模组，其中，所述延伸部与所述支撑部的连接处的高度与所述导光板的顶面的高度 相同。
  8. 根据权利要求1所述的可维持反射片折边设计角度的背光模组，其中，所述衬底部与所述延伸部之间具有谷折线。
  9. 根据权利要求1所述的可维持反射片折边设计角度的背光模组，其中，所述延伸部与所述支撑部之间具有山折线。
  10. 一种显示装置，包含：
    根据权利要求1至9中任一项所述的可维持反射片折边设计角度的背光模组；以及
    显示面板，其设置在所述背光模组的上方。
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CN101509625A (zh) * 2009-04-07 2009-08-19 友达光电股份有限公司 背光模块及光电装置
JP2013239335A (ja) * 2012-05-15 2013-11-28 Sharp Corp バックライトユニットおよび液晶表示装置
JP2016110692A (ja) * 2014-12-02 2016-06-20 シャープ株式会社 バックライト装置及び液晶表示装置
CN113376729A (zh) * 2021-03-09 2021-09-10 达运精密工业股份有限公司 背光模块及其显示装置
CN216013726U (zh) * 2021-09-30 2022-03-11 瑞仪(广州)光电子器件有限公司 背光模组及显示器

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TWI476461B (zh) * 2013-03-15 2015-03-11 具導光板定位結構之背光模組
TWM612751U (zh) * 2021-01-29 2021-06-01 中強光電股份有限公司 背光模組與顯示器

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Publication number Priority date Publication date Assignee Title
CN101509625A (zh) * 2009-04-07 2009-08-19 友达光电股份有限公司 背光模块及光电装置
JP2013239335A (ja) * 2012-05-15 2013-11-28 Sharp Corp バックライトユニットおよび液晶表示装置
JP2016110692A (ja) * 2014-12-02 2016-06-20 シャープ株式会社 バックライト装置及び液晶表示装置
CN113376729A (zh) * 2021-03-09 2021-09-10 达运精密工业股份有限公司 背光模块及其显示装置
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