WO2016041369A1 - 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
WO2016041369A1
WO2016041369A1 PCT/CN2015/078998 CN2015078998W WO2016041369A1 WO 2016041369 A1 WO2016041369 A1 WO 2016041369A1 CN 2015078998 W CN2015078998 W CN 2015078998W WO 2016041369 A1 WO2016041369 A1 WO 2016041369A1
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WO
WIPO (PCT)
Prior art keywords
frame
backlight module
light
light emitting
display device
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PCT/CN2015/078998
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English (en)
French (fr)
Inventor
张明辉
李东熙
郑辉
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US14/785,821 priority Critical patent/US9664846B2/en
Publication of WO2016041369A1 publication Critical patent/WO2016041369A1/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
    • G02B6/0081—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
    • G02B6/0033—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

Definitions

  • Embodiments of the present invention relate to a backlight module and a display device.
  • the backlight module is one of the key components of the liquid crystal display device, and is mainly used for providing sufficient light source with uniform brightness and uniform distribution, so that the liquid crystal panel can display images normally.
  • the main components of the backlight module include a light-emitting element, a reflective sheet, a light guide plate, an optical film, a frame, and a back sheet.
  • the frame is used to connect or position other components in the backlight module, and plays a certain role of support and fixation.
  • the Mold Frame also referred to as the plastic frame
  • the spacer portion is mainly used for supporting the display panel and fixing the optical film.
  • the arrangement of the spacer portion hinders the light emitted from the backlight, resulting in the problem that the edge pixels disappear when, for example, the side view display panel is as shown in FIG. 1.
  • the edge pixels disappear, for example, as shown in FIG.
  • the "H" on the right side can only see half.
  • Embodiments of the present invention provide a backlight module and a display device.
  • Embodiments of the present invention provide a backlight module including a backboard, a light emitting assembly on the backboard, and a frame at a periphery of the backboard;
  • the frame includes a main body portion and the main body portion is adjacent to the a wedge portion on one side of the light-emitting assembly, the slope of the wedge portion faces the light-emitting surface of the light-emitting assembly, and an angle formed between a slope of the wedge portion and a light-emitting surface of the light-emitting assembly is an acute angle;
  • a groove for fitting the light-emitting assembly is provided on the inclined surface of the portion.
  • An embodiment of the present invention further provides a display device, which includes any backlight module according to an embodiment of the present invention.
  • FIG. 1 is a schematic view of a human eye viewing a display panel at an angle
  • FIG. 2 is a schematic diagram of an edge pixel disappearing phenomenon when the panel is viewed from a side view
  • FIG. 3 is a schematic structural view of a backlight module mounted in a display device
  • FIG. 4 is a schematic structural view of a backlight module mounted in a display device according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of backlight illumination of a display device including a backlight module according to an embodiment of the present invention
  • FIG. 6 is a schematic view of an effective light exit angle of a light emitting diode LED
  • FIG. 7 is a three-dimensional structural diagram of a frame of a backlight module according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural view of a backlight module according to an embodiment of the present invention.
  • the orientation or positional relationship of the terms “upper”, “lower” and the like is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the embodiments of the present invention.
  • the simplifications of the invention are not to be construed as limiting or limiting the invention.
  • the terms “mounted,” “connected,” and “connected” are used in a broad sense, and may be, for example, a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, It can also be an electrical connection; it can be directly connected, or it can be connected indirectly through an intermediate medium, which can be the internal connection of two components.
  • the meaning of the above terms in the present disclosure can be understood on a case-by-case basis.
  • a backlight module is first used here.
  • the structure example details the reason why the edge pixels disappear when viewed sideways.
  • FIG. 1 is a schematic view of a human eye looking at a display panel at an angle.
  • the light emitted by the edge pixels in the vicinity of the display device frame 102 (also referred to as the front bezel) should be obliquely emitted and enter the human eye, so that the human eye should be able to see the entire display panel 101.
  • the image displayed in the conventional backlight module design, especially in the backlight module under the narrow bezel design, the problem that the edge pixels of the display panel disappear in the side view as shown in FIG. 2 may occur.
  • the main reason for this problem is that the frame in the backlight module is provided with a spacer portion mainly for supporting the display panel and fixing the optical film, and the spacer portion blocks the light emitted from the backlight.
  • the backlight module includes a back plate 301, a light emitting assembly 302, and a frame 303.
  • the light-emitting component 302 is located on the backplane 301 for providing backlight to the display panel 101, and may include a light-emitting component 3021, a light guide plate, a reflective sheet, an optical film, etc.;
  • the frame 303 is located at the periphery of the backplane 301 for connection or positioning.
  • Other components in the backlight module and play a certain role of support and fixation.
  • the display panel 101 is mounted on the backlight module and supported by the spacer portion 3031 of the frame 303.
  • the display device frame 102 is mounted on the periphery of the display panel 101 and the back plate 301, and mainly functions as a support and a protection.
  • the light-emitting component 302 emits light upward, for example, by supplying power to the light-emitting element 3021, such as a light-emitting diode, to emit light upward, which is sufficient to cover the display area (AA area) of the entire display panel 101, thereby
  • the display panel 101 is provided with backlighting.
  • the side view display panel 101 as can be seen from FIG.
  • the spacer portion 3031 blocks part of the light emitted from the light emitting unit 302, a portion of the display area (AA area) of the display panel 101 is partially formed. There is no oblique light passing through the area. Due to the lack of backlighting, pixels in this partial area, that is, pixels of the edge portion of the display area, cannot be normally displayed in side view. Thus, the phenomenon that the edge pixels disappear when viewed from the side is generated.
  • Embodiments of the present invention provide a backlight module.
  • the backlight module includes a back plate 401, a light-emitting assembly 402 on the back plate 401, and a frame 403 at the periphery of the back plate 401.
  • the frame 403 includes a main body portion 4031 and a wedge portion 4032 located on a side of the main body portion 4031 adjacent to the light emitting assembly 402.
  • the inclined surface of the wedge portion 4032 faces the light emitting surface 4022 of the light emitting assembly 402, and the inclined surface 40321 of the wedge portion 4032 and the light emitting assembly 402
  • the angle ⁇ formed between the light-emitting surfaces 4022 is an acute angle.
  • a groove 40322 for fitting the light-emitting assembly 402 may be provided on the slope of the wedge portion 4032.
  • the light-emitting component 402 is used to provide backlighting to the display panel 101, for example, including a light-emitting element 4021, a light guide plate, a reflective sheet, an optical film, and the like.
  • the structure and composition thereof can be referred to a general design, and details are not described herein again.
  • the frame 403 in Fig. 4 further includes a card groove portion 4033 and an outer portion 4034 as a design example for fixing the frame to the back plate, which will be described in detail later.
  • the invention is not limited thereto.
  • the division between the portions of the frame 403 in FIG. 4 is also only for illustration.
  • the main body portion 4031 is a supporting portion
  • the wedge portion 4032 includes a portion having a wedge-shaped inclined surface 40321;
  • the card groove portion 4033 is a back plate.
  • the portion where the 401 is joined to each other, the outer portion 4034 is a portion located outside the back plate 401.
  • the display panel 101 is mounted on the backlight module and supported by the wedge portion 4032 of the frame 403.
  • the display device frame 102 is mounted on the periphery of the display panel 101 and the back plate 401, and mainly serves as a support and protection.
  • the backlight of the display device including the backlight module is in operation as shown in FIG. 5.
  • the light-emitting component 402 emits light upward, and the light is sufficient to cover the display area of the entire display panel 101 ( The AA area) can thus provide backlighting for the display panel 101.
  • the frame 403 is configured to include the wedge portion 4032, the light emitted by the light-emitting assembly 402 can be obliquely traversed through the display panel so that all pixels in the display area (AA area) can be A sufficient backlight is obtained, so that the edge pixels disappearing in side view as shown in FIG. 3 do not occur.
  • the design of the wedge portion 4032 can change the supporting effect of the backlight module on the display panel 101, and the light-emitting component 402 can be fitted by providing a groove on the inclined surface, that is, the optical film that fixes the surface of the light-emitting component 402 can also be used.
  • the backlight module provided by the embodiment of the invention can solve the problem that the edge pixels disappear when viewed from the side, and can have a narrow frame width, and is suitable for the display device under the narrow frame design.
  • each structure shown in FIG. 4 is only an example, and those skilled in the art may modify or replace the various structures in the figure according to the above solution, such as a backboard separated from the bottom plate by the side wall.
  • the structure, or the frame is made into other shapes, as long as it employs a frame structure including the above-described wedge portion 4032, it is apparent that the spirit and scope of the embodiments of the present invention are not deviated.
  • an angle formed between the slope of the wedge portion 4032 and the light exit surface of the light emitting assembly 402 The ⁇ is between 10° and 80°, and the frame 403 in this range can be stably engaged with the light-emitting component 402, and at the same time has the appearance of facilitating the illumination of the backlight, and is suitable for the display device under the narrow bezel design.
  • the angle ⁇ formed between the inclined surface 40321 of the wedge portion 4032 and the light exit surface 4022 of the light-emitting assembly 402 is 60°.
  • the effective light-emitting angle of the light-emitting diode (LED) shown in FIG. 6 the effective light-emitting angle of the LED selected for the backlight module is generally 120°.
  • the effect of improving the disappearance of the edge pixels in the side view becomes less apparent.
  • the slope of the wedge portion 4032 will be closer to the light-emitting surface 4022 of the light-emitting component 402, so that the angle of the light indicated by the arrow in FIG. 5 can be closer to the surface of the display panel, then The side angle of view of receiving these rays will also be correspondingly smaller, and the effect of improving the disappearance of the edge pixels in the side view will be worse.
  • ⁇ is 60°, it is possible to achieve a better effect of improving the disappearance of edge pixels in side view.
  • the groove 40322 on the inclined surface 40321 of the wedge portion 4032 includes, for example, a groove surface 40323 which is parallel to and opposite to the light emitting surface of the light emitting component 402.
  • the lower groove surface of the structure can be firmly adhered to the surface of the light emitting component 402, and the optical component of the light emitting component 402.
  • the diaphragm can be stably held by this groove surface, and at the same time, it is not easy to damage the optical film.
  • the other groove faces of the groove can be correspondingly designed according to the edge shape of the light-emitting component 402 to achieve a better fitting effect.
  • the side of the wedge portion 4032 facing away from the light-emitting assembly 402 is a plane parallel to the light-emitting surface of the light-emitting assembly 402. This design ensures that the display panel and the wedge portion can be parallel to the light-emitting surface of the backlight. It is beneficial to improve the uniformity of brightness and brightness of the display.
  • the back plate 401 includes, for example, a side wall 4011 and a bottom plate 4012.
  • the light emitting assembly 402 is located on the bottom plate 4012, and the main body portion 4031 of the frame 403 is engaged with the side wall 4011. That is, the supporting main body portion 4031 of the frame 403 is joined to the side wall 4011 of the back plate 401 and surrounds the inner side (or the outer side) of the frame of the back plate 401, thereby making the back plate 401 as an integral support of the frame 403. Conducive to making the structure compact and space saving.
  • the frame 403 includes a card slot portion 4033 located outside the body portion 4031.
  • the side wall of the back plate 401 is provided with a through hole 4013 corresponding to the slot portion 4033, so that the frame 403 is fixed to the back plate 401 by the engagement of the slot portion 4033 with the through hole 4013.
  • the design is mainly provided on the back plate 401 and the frame 403 to be mutually The through hole 4013 and the card groove portion 4033 are engaged to closely fix the back plate 401 and the frame 403.
  • the frame 403 may further include an outer portion 4034 connected to the card slot portion 4033 and located outside the side wall 4011 of the back plate 401.
  • the projected area of the outer portion 4034 on the side wall of the back plate is larger than the area of the through hole 4013. .
  • the outer portion 4034 cannot pass through the through hole 4013, and is connected to the card slot portion 4033 and located outside the side wall 4011 of the back plate 401, so that it can be more firmly fixed in cooperation with the card slot portion 4034.
  • the entire frame 403 is not easily slipped.
  • the division between the portions of the frame 403 in FIGS. 4 and 7 is also merely illustrative, where the main body portion 4031 is the portion that serves as a support, and the wedge portion 4032 includes the portion of the wedge-shaped bevel 40231;
  • the groove portion 4033 is a portion that is joined to the back plate 401, and the outer portion 4034 is a portion located outside the back plate 401.
  • the structure of the above frame 403 is only used as a design example for fixing the frame to the back plate.
  • an "h" type frame structure as shown in FIG. 3 may be employed, and protrusions which can be fitted to each other are provided on the back plate and the frame.
  • the present invention does not limit the fixing between the frame and the backing plate by using the other structures or designs.
  • the main body portion 4031 is integrated with the wedge portion 4032 and combined with the side wall of the back plate 401, thereby saving materials.
  • the card slot portion 4033 fills the entire space of the through hole in the side wall, and the outer portion 4034 is designed in the shape of a trapezoidal round cap to firmly and tightly engage the back plate 401 and the frame 403.
  • the structures of the above-mentioned several kinds of frames 403 are less likely to rotate because the center of gravity is close to the center as compared with the "h" type frame of the combined wedge portion 4032.
  • the main body portion 4031 and the wedge portion 4032 in Fig. 5 are also an integrated structure.
  • the embodiment of the present invention further provides a display device, which includes any of the above backlight modules.
  • the display device may be any product or component having a display function such as a liquid crystal panel, a mobile phone, a watch, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • the display device may have the structure shown in FIG. 4 or 8.
  • the display device includes a display panel 101 attached to a portion of the surface of the frame 403 facing away from the side of the light-emitting assembly 402.
  • the display device when the frame 403 further includes a card slot portion located outside the body portion and an external portion connected to the card slot portion, the display device further includes a display device frame 102 located outside the back plate, and the display device frame 102 is provided on the outside
  • the corresponding through hole 1021 is configured to make the external portion 4034 visible, and thus the external portion 4034 can have a larger volume and weight.
  • the display device and the backlight module have the same technical features, so that the same technical problem can be solved and the same technical effect is produced.
  • the embodiment of the present invention mainly utilizes a frame design having a wedge portion, so that light emitted from the light-emitting component near the edge of the backlight module can be obliquely emitted at a certain angle, so that the human eye can also see when squinting.
  • the illumination of the edge pixels can solve the problem that the edge pixels disappear when viewed from the side.
  • the design of the wedge portion can not fix the supporting effect of the backlight module on the display panel, and the light-emitting component and the frame are fixed to each other by providing a groove on the inclined surface, that is, the function of fixing the optical film can also be achieved.
  • the backlight module provided by the embodiment of the present invention mainly utilizes a frame design having a wedge portion to improve the emission of backlight light at the edge of the narrow bezel design, and can solve the problem of disappearing edge pixels in the side view, and can have a narrow border. Width for display devices in narrow bezel designs.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种背光模组及显示装置，该背光模组包括背板（401）、位于所述背板（401）上的发光组件（402）和位于所述背板（401）周边的框架（403），所述框架（403）包括主体部（4031）和位于所述主体部（4031）靠近所述发光组件（402）的一侧的楔形部（4032），所述楔形部（4032）的斜面（40321）面向所述发光组件（402）的出光面（4022），并且所述楔形部（4032）的斜面（40321）与所述发光组件（402）的出光面（4022）之间形成的夹角为锐角。该背光模组及显示装置主要利用具有楔形部（4032）的框架（403）设计改善窄边框设计中边缘处背光源光线的出射，解决侧视时的边缘像素消失的问题。

Description

背光模组及显示装置 技术领域
本发明的实施例涉及一种背光模组及显示装置。
背景技术
在液晶显示装置中，背光模组为液晶显示装置的关键组件之一，其主要用于提供足够的亮度及分布均匀的光源，使得液晶面板能正常显示影像。背光模组的主要构成组件包括发光元件、反射片、导光板、光学膜片、框架以及背板等。其中，框架用于连接或者定位背光模组中的其他组件，并起到一定的支撑和固定作用。
然而，在目前日渐盛行的窄边框设计(指前框(Module Bezel)的宽度小于常规产品的设计)中，框架(Mold Frame，又称胶框)通常须包括设置在显示面板与光学膜片之间的隔垫部，主要用于支撑显示面板、以及固定光学膜片。
但是，隔垫部的设置会阻碍背光源出射的光线，导致在例如如图1所示侧视显示面板时，会出现边缘像素消失的问题，边缘像素消失例如如图2所示，图中最右侧的“H”只能看到一半。
发明内容
本发明的实施例提供一种背光模组及显示装置。
本发明的实施例提供一种背光模组，包括背板、位于所述背板上的发光组件和位于所述背板周边的框架；所述框架包括主体部和位于所述主体部靠近所述发光组件一侧的楔形部，所述楔形部的斜面面向所述发光组件的出光面，并且所述楔形部的斜面与所述发光组件的出光面之间形成的夹角为锐角；所述楔形部的斜面上设有用于嵌合所述发光组件的凹槽。
本发明的实施例还提供一种显示装置，所述显示装置包括本发明实施例中任意一种背光模组。
附图说明
为了更清楚地说明本发明实施例的技术方案，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发明的一些实施例，而非对本发明的限制。
图1是人眼以一定角度侧视显示面板的示意图；
图2是侧视时显示面板时的边缘像素消失现象的示意图；
图3是一种安装在显示装置中的背光模组的结构示意图；
图4是本发明一个实施例中安装在显示装置中的背光模组的结构示意图；
图5是包括本发明一个实施例中背光模组的显示装置在工作时的背光照明情况示意图；
图6是发光二极管LED的有效出光角度的示意图；
图7是本发明一个实施例中背光模组的框架的三维结构示意图；
图8是本发明一个实施例中一种背光模组的框架结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明的实施例描述中需要说明的是，术语“上”、“下”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明的实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本公开中的含义。
为了更清楚地说明本发明的实施例的技术方案，这里先以一种背光模组 的结构示例详细说明侧视时边缘像素消失的原因。
图1是人眼以一定角度侧视显示面板的示意图。如图1所示，此时，显示装置边框102(也称前框，Module Bezel)附近的边缘像素发出的光线理应斜向出射并进入人眼，从而人眼应可以看到整个显示面板101所显示的图像。但是，在通常的背光模组设计中，尤其是窄边框设计下的背光模组中，会出现如图2所示出的侧视时显示面板的边缘像素消失的问题。出现这一问题的主要原因在于，背光模组中框架设有主要用于支撑显示面板、并固定光学膜片的隔垫部，而隔垫部会对背光源出射的光线进行遮挡。
例如，在图3所示出的一种安装在显示装置中的背光模组的结构示意图中，背光模组包括背板301、发光组件302和框架303。其中，发光组件302位于背板301上，用于向显示面板101提供背光，可包括发光元件3021、导光板、反射片、光学膜片等；框架303位于背板301周边，用于连接或者定位背光模组中的其他组件，并起到一定的支撑和固定作用。在此背光模组的结构下，显示面板101被安装在背光模组之上，并由框架303的隔垫部3031提供支撑。显示装置边框102安装在显示面板101及背板301的周边，主要起到支撑和保护的作用。正视显示面板101的情况下，发光组件302向上发射出光线，例如通过对其中发光元件3021例如发光二极管供电以向上发射出光线，光线足以覆盖整个显示面板101的显示区域(AA区)，因而可以为显示面板101提供背光照明。然而在侧视显示面板101的情况下，从图3中可以看出，由于隔垫部3031遮挡住了由发光组件302射出的部分光线，使得显示面板101的显示区域(AA区)内有部分区域没有斜射的光线穿过。由于缺少背光照明，这一部分区域内的像素、即显示区域的边缘部分的像素在侧视时不能正常显示。因而产生了侧视时边缘像素消失的现象。
本发明实施例提供一种背光模组，参见图4示出的安装在显示装置中的背光模组的结构。该背光模组包括背板401、位于背板401上的发光组件402、和位于背板401周边的框架403。其中，框架403包括主体部4031和位于主体部4031靠近发光组件402一侧的楔形部4032，楔形部4032的斜面面向发光组件402的出光面4022，并且楔形部4032的斜面40321与发光组件402的出光面4022之间形成的夹角α为锐角。另外为使框架403被固定住，可以在楔形部4032的斜面上设置用于嵌合发光组件402的凹槽40322。
发光组件402用于向显示面板101提供背光照明，例如包括发光元件4021、导光板、反射片、光学膜片等结构，其结构及组成可以参照通常设计，在此不再赘述。图4中的框架403还包括卡槽部4033及外置部4034，仅作为使框架固定在背板上的设计示例，将在后文做详细说明。当然，也可以采用如图3所示的“h”型框架结构、在背板和框架上设置可以相互嵌合的凸起和凹陷、或者采用其他结构或设计来实现框架与背板间的固定，本发明对此不做限定。而且，图4中对于框架403各部分之间的划分也仅作为示意，这里的主体部4031即起支撑作用的部分，楔形部4032即包括楔形斜面40321的部分；卡槽部4033即与背板401相互接合的部分，外置部4034即位于背板401外侧的部分。
本发明实施例所提供的背光模组安装在显示装置中时，显示面板101被安装在该背光模组之上，并由框架403的楔形部4032提供支撑。显示装置边框102安装在显示面板101及背板401的周边，主要起到支撑和保护的作用。
例如，包括该背光模组的显示装置在工作时的背光照明情况如图5所示，正视显示面板101的情况下，发光组件402向上发射出光线，光线足以覆盖整个显示面板101的显示区域(AA区)，因而可以为显示面板101提供背光照明。斜视显示面板101的情况下，由于框架403采用包括楔形部4032的结构，发光组件402发出的光线可以不被遮挡地斜向穿过显示面板，使得显示区域(AA区)内的所有像素都能得到充足的背光照明，因而不会出现如图3所示的侧视时边缘像素消失的情况。
而且，楔形部4032的设计可以不改变背光模组对显示面板101的支撑作用，并通过在斜面上设置凹槽以嵌合发光组件402，即同样可以起到固定发光组件402表面的光学膜片的作用。
本发明实施例所提供的背光模组可以解决侧视时边缘像素消失的问题，同时可以具有很窄的边框宽度，适用于窄边框设计下的显示装置。
需要说明的是，图4示出的各个结构的形状仅作为一种示例，本领域技术人员可以依照上述方案对图中的各个结构进行修改或者等同替换，如采用侧壁与底板分离的背板结构、或者将框架制作成其他形状，只要其采用了包括上述楔形部4032的框架结构，就显然不脱离本发明实施例的精神和范围。
例如，上述楔形部4032的斜面与发光组件402的出光面之间形成的夹角 α介于10°至80°之间，该范围下的框架403可以稳固地与发光组件402进行嵌合，同时又具有利于背光照明光线的出射，适用于窄边框设计下的显示装置。例如，上述楔形部4032的斜面40321与发光组件402的出光面4022之间形成的夹角α为60°。参见图6所示的发光二极管(Light-Emitting Diode，LED)的有效出光角度示意图，一般对于背光模组所选用的LED，其有效出光角度为120°。因此，在上述α大于60°时，由于图5中以箭头表示的光线较为稀疏，会使得改善侧视时边缘像素消失的效果变得不再明显。而在上述α小于60°时，楔形部4032的斜面会更贴近于发光组件402的出光面4022，从而图5中以箭头表示的光线可以出射的角度也会更贴近于显示面板表面，那么可以接收到这些光线的侧视角也会对应地变小，改善侧视时边缘像素消失的效果会变差。例如，当α为60°时可以达到较好的改善侧视时边缘像素消失的效果。
上述楔形部4032的斜面40321上的凹槽40322例如包括与发光组件402的出光面平行且相对的一个槽面40323，该结构下槽面可以与发光组件402表面稳固贴合，发光组件402的光学膜片可以被这一槽面稳定地固定住，同时又不容易对光学膜片造成损伤。上述凹槽的其他槽面可以根据发光组件402的棱边形状进行相应的设计，以达到较好的嵌合效果。
另外，例如使上述楔形部4032的背向发光组件402的一侧为与发光组件402的出光面平行的平面，这一设计保障了显示面板与楔形部接合后可以与背光源的出光面互相平行，有利于提高显示的亮度与亮度的均匀程度。
另一方面，参见图4，上述背板401例如包括侧壁4011和底板4012，发光组件402位于底板4012上，框架403的主体部4031与侧壁4011接合。即框架403的起支撑作用的主体部4031接合于背板401的侧壁4011上，并围绕背板401的边框内侧(或外侧)环绕一周，因而使背板401作为框架403的整体支撑，有利于使结构紧凑化、节省空间。
在此基础之上，上述包括卡槽部4033及外置部4034的框架403的三维结构如图7所示，图中仅表示框架403中的一段。结合图4可以看出，框架403包括位于主体部4031外侧的卡槽部4033。而背板401的侧壁上设有与卡槽部4033对应的通孔4013，以使框架403通过卡槽部4033与该通孔4013的接合固定在背板401上。该设计主要在背板401和框架403上设置可相互 接合的通孔4013和卡槽部4033，用以紧密地固定背板401和框架403。
另外，框架403还可以包括与卡槽部4033相连且位于背板401的侧壁4011外侧的外置部4034，外置部4034在背板的侧壁上的投影面积大于上述通孔4013的面积。该设计下外置部4034不能穿过上述通孔4013，且与卡槽部4033相连并位于背板401的侧壁4011的外侧，因此可以在与卡槽部4034的配合下更稳固地固定住整个框架403，且不容易产生滑动。
与上面的叙述一致，图4和图7中对于框架403各部分之间的划分也仅作为示意，这里的主体部4031即起支撑作用的部分，楔形部4032即包括楔形斜面40321的部分；卡槽部4033即与背板401相互接合的部分，外置部4034即位于背板401外侧的部分。而且，上述框架403的结构仅作为使框架固定在背板上的设计示例，当然也可以采用如图3所示的“h”型框架结构、在背板和框架上设置可以相互嵌合的凸起和凹陷、或者采用其他结构或设计来实现框架与背板间的固定，本发明对此不做限定。
例如，参见图8所示的一种背光模组的框架403的结构，这里主体部4031与楔形部4032一体化，并与背板401的侧壁相结合，节省了用料。而卡槽部4033填满了侧壁上通孔的全部空间，外置部4034设计成梯形圆帽的形状，以使背板401和框架403稳固而紧密的接合。另外，上述几种框架403的结构相比较与结合楔形部4032的“h”型框架而言由于重心与中心相贴近，因而更不容易发生转动。例如，图5中的主体部4031与楔形部4032也为一体化结构。
基于上述背光模组，本发明实施例还提供一种显示装置，该显示装置包括上述任意一种背光模组。
例如，该显示装置可以为：液晶面板、手机、手表、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。该显示装置可以具有图4或图8所示的结构。例如，该显示装置包括显示面板101，显示面板101粘贴在框架403背向发光组件402的一侧的部分表面上。例如，当框架403还包括位于主体部外侧的卡槽部及与卡槽部相连的外置部时，显示装置还包括位于背板外侧的显示装置边框102，显示装置边框102上设有与外置部对应的通孔1021，用以使上述外置部4034可以显露出来，因而上述外置部4034可以具有更大的体积和重量。由于本发明实施例提供的 显示装置与上述背光模组具有共同的技术特征，所以也能解决同样的技术问题，产生相同的技术效果。
综上所述，本发明的实施例主要利用具有楔形部的框架设计，使得背光模组的边缘附近从发光组件出射的光线可以沿一定角度斜向出射，从而使得斜视时人眼也能看到边缘像素的发光，可解决侧视时的边缘像素消失的问题。
而且，楔形部的设计可以不改变背光模组对显示面板的支撑作用，并通过在斜面上设置凹槽将发光组件与框架相互固定住，即同样可以起到固定光学膜片的作用。
本发明实施例所提供的背光模组主要利用具有楔形部的框架设计改善了窄边框设计中边缘处背光源光线的出射，可以解决侧视时边缘像素消失的问题，同时可以具有很窄的边框宽度，适用于窄边框设计下的显示装置。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备，不仅包括那些要素，而且还可包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。
本专利申请要求于2014年9月19日递交的中国专利申请第201410483937.9号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。

Claims (12)

  1. 一种背光模组，包括背板、位于所述背板上的发光组件和位于所述背板周边的框架，其中，所述框架包括主体部和位于所述主体部靠近所述发光组件一侧的楔形部，所述楔形部的斜面面向所述发光组件的出光面，并且所述楔形部的斜面与所述发光组件的出光面之间形成的夹角为锐角。
  2. 根据权利要求1所述的背光模组，其中，所述楔形部的斜面与所述发光组件的出光面之间的夹角介于10°至80°之间。
  3. 根据权利要求2所述的背光模组，其中，所述楔形部的斜面与所述发光组件的出光面之间的夹角为60°。
  4. 根据权利要求1所述的背光模组，其中，所述楔形部的斜面上设有用于嵌合所述发光组件的凹槽。
  5. 根据权利要求4所述的背光模组，其中，所述凹槽包括与所述发光组件的出光面平行且相对的一个槽面。
  6. 根据权利要求1所述的背光模组，其中，所述楔形部背向所述发光组件的一侧为与所述发光组件的出光面平行的平面。
  7. 根据权利要求1至6中任意一项所述的背光模组，其中，所述背板包括侧壁和底板，所述发光组件位于所述底板上，所述框架的主体部与所述侧壁接合。
  8. 根据权利要求7所述的背光模组，其中，所述框架还包括位于所述主体部外侧的卡槽部；所述背板的侧壁上设有与所述卡槽部对应的通孔；所述框架通过所述卡槽部与所述通孔的接合固定在所述背板上。
  9. 根据权利要求8所述的背光模组，其中，所述框架还包括与所述卡槽部相连且位于所述背板侧壁外侧的外置部，所述外置部在所述背板的侧壁上的投影面积大于所述通孔的面积。
  10. 一种显示装置，包括权利要求1至9中任意一项所述的背光模组。
  11. 根据权利要求10所述的显示装置，其中，所述显示装置包括显示面板，所述显示面板粘贴在所述框架背向所述发光组件的一侧的部分表面上。
  12. 根据权利要求10或11所述的显示装置，其中，所述框架还包括位于所述主体部外侧的卡槽部及与所述卡槽部相连的外置部，所述显示装置还 包括位于所述背板外侧的显示装置边框，所述显示装置边框上设有与所述外置部对应的通孔。
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