WO2016050067A1 - 反射片、背光模组和显示装置 - Google Patents

反射片、背光模组和显示装置 Download PDF

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Publication number
WO2016050067A1
WO2016050067A1 PCT/CN2015/078484 CN2015078484W WO2016050067A1 WO 2016050067 A1 WO2016050067 A1 WO 2016050067A1 CN 2015078484 W CN2015078484 W CN 2015078484W WO 2016050067 A1 WO2016050067 A1 WO 2016050067A1
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WO
WIPO (PCT)
Prior art keywords
opening
reflective sheet
closing structure
backlight module
reflection sheet
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PCT/CN2015/078484
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English (en)
French (fr)
Inventor
卢永春
乔勇
程鸿飞
先建波
马永达
徐健
Original Assignee
京东方科技集团股份有限公司
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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 EP15763810.7A priority Critical patent/EP3203143B1/en
Priority to US14/787,501 priority patent/US9709849B2/en
Publication of WO2016050067A1 publication Critical patent/WO2016050067A1/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
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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

  • Embodiments of the present invention relate to a reflective sheet, a backlight module including the reflective sheet, and a display device including the same.
  • the backlight module can be divided into two types: a side light type and a direct type.
  • the direct-lit backlight module is disposed under the liquid crystal display panel so that the liquid crystal display panel can obtain a higher light source intensity. Therefore, such liquid crystal display products are mostly used for high brightness demand displays such as computer screens and LCD TVs. in.
  • the backing plate 10 is provided with a positioning post 30.
  • the reflecting sheet 20 located above the backing plate 10 is correspondingly provided with a plurality of opening regions 200 at the position corresponding to the positioning post 30, and the top end of the positioning post 30 Through the opening area 200, the reflection sheet 20 is fixed.
  • the positioning post 30 is usually made of a transparent material, and the transparent positioning post is present between the reflective sheet 20 and the light source 50, which affects the reflection effect of the light, so that the viewer may see the positioning post 30 on the display screen side.
  • the contour remains, resulting in poor display.
  • a reflective sheet including a reflective sheet body provided with a plurality of open regions and an opening and closing structure disposed in each of the open regions; the opening and closing structure includes at least one movable blade, and the movable type One side of the blade is connected to an edge of the opening area in the reflector body; the movable blade has a reflecting surface, and a reflecting surface of the movable blade is disposed on the same side as a reflecting surface of the reflecting sheet body.
  • the open area is a polygonal open area.
  • the opening and closing structure is a movable blade that matches the polygonal opening area.
  • the opening and closing structure includes a plurality of movable blades; the number of the movable blades is the same as the number of sides of the polygonal opening region, and the plurality of movable blades are respectively associated with the polygonal opening region One edge meets.
  • the plurality of movable blades match the polygonal opening area in a closed state.
  • the plurality of movable blades are all triangular movable blades.
  • the reflective sheet further includes a plurality of openings disposed on the reflective sheet body; the plurality of openings are distributed in an array on the reflective sheet body.
  • the opening and the opening and closing structure are alternately arranged on the reflective sheet body in units of rows, and the opening and the opening and closing structure are facing in the direction of the column; or
  • the opening and the opening and closing structure are alternately arranged on the reflective sheet body in units of columns, and the opening and the opening and closing structure face each other in the row direction.
  • a backlight module including a back plate and a plurality of positioning posts fixed on the back plate; the backlight module further includes the above-mentioned reflective sheet; wherein the position and position of the positioning post Corresponding to the position of the opening and closing structure of the reflection sheet, the positioning post is used to pass through the opening area of the reflection sheet to open the opening and closing structure.
  • the number of the opening and closing structures is greater than the number of the positioning posts.
  • the reflective sheet further includes a plurality of openings disposed on the reflective sheet body
  • the backlight module further includes a light source and an optical film
  • the light source includes a plurality of light emitting arrays a diode
  • the positions of the plurality of light emitting diodes are in one-to-one correspondence with the opening positions of the reflective sheet.
  • a display device including the backlight module described above.
  • FIG. 1 is a schematic structural view of a conventional backlight module
  • FIG. 2 is a schematic structural diagram of a reflective sheet according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of another reflective sheet according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of the opening and closing structure of the reflection sheet shown in FIG. 2 in an open state;
  • FIG. 5 is a schematic structural diagram of a backlight module according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of another backlight module according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of another display device according to an embodiment of the present invention.
  • 10-back plate 20-reflecting sheet; 200-opening area; 201-reflecting sheet body; 202-opening structure; 203-opening; 30-positioning pillar; 40-optical diaphragm; 50-light source; panel.
  • Embodiments of the present invention provide a reflective sheet, a backlight module, and a display device, which can reduce the interference effect of the positioning post on the light reflection effect, so that the viewer does not see the contour residual image of the positioning column on the display screen side. To get a good display.
  • Embodiments of the present invention provide a reflective sheet 20, as shown in FIGS. 2 and 3, including a reflective sheet body 201 provided with a plurality of open regions and an opening and closing structure 202 in the open region; the opening and closing structure 202 Included at least one movable blade, and one side of the movable blade is connected to an edge of an open area in the reflector body 201; the movable blade has a reflective surface, and the reflective surface of the movable blade is The reflecting surface of the reflecting sheet body 201 is located on the same side.
  • the opening and closing structure 202 of the opening area can exhibit two states of opening and closing according to actual conditions.
  • a positioning post or other structure is disposed below the opening and closing structure 202
  • the movable blade of the opening and closing structure 202 is jacked up by a positioning post or other structure that passes through the opening area, thereby being An open state
  • the movable blade of the opening and closing structure 202 is dropped, and is in the same plane as the reflective sheet body 201, thereby being Closed state.
  • One side of the movable blade is connected to the edge of the open area of the reflector body 201 in order to ensure that the movable blade can be free from external force if the movable blade is lifted by, for example, a positioning post. Tethered to reach the open state.
  • the position of the opening region should correspond to the position of the positioning post in the backlight module.
  • the position of the open area corresponds to the position of the positioning post; or the position of the open area corresponds to the position of the positioning post, and corresponds to the unset The position of the positioning column.
  • the number of the opening regions is greater than or equal to the number of the positioning posts.
  • the shape of the opening area may include various shapes, but it should be ensured that the positioning post in the backlight module can pass through the opening area to define the position of the reflection sheet 20 so that relative movement does not occur.
  • the shape of the opening area may be a circular opening matching the shape of the cylindrical positioning post, but may also be positioned with the cylindrical shape.
  • Other shapes such as an circumscribed triangle or a rectangle which are in contact with the side of the column may ensure that the opening area cannot be relatively moved with respect to the positioning post on a plane parallel to the reflection sheet 20.
  • all of the movable blades may have the same shape as the open area, but may be different as long as it can be ensured that all of the movable blades can completely fall into the range of the open area in their closed state. It is sufficient that the actual shape of each of the movable blades is not specifically limited herein.
  • the reflective sheet body 201 and the opening and closing structure 202 may be made of a reflective material such as a metal or alloy material such as silver, aluminum, gold, chromium, copper, indium, bismuth, nickel, platinum, tin, or the like.
  • a reflective coating such as a yellowing resistant and heat resistant white reflective paint may be applied to the reflective sheet body 201 or the opening and closing structure 202 as long as it has a good reflective effect and stable physicochemical properties.
  • the reflective sheet body 201 and the opening and closing structure 202 are formed from the same reflective material.
  • a positioning post fixed on the backboard can pass through the opening area to open the opening and closing structure 202;
  • the movable vane in the opening and closing structure 202 is jacked up by the positioning post, so as to block the surface of the positioning post so as not to be directly exposed between the light sources, which can effectively weaken the positioning post for light reflection.
  • the effect of the interference so that the viewer does not see the positioning post on the side of the display screen The contour remains, which improves the display quality.
  • the open area in the reflective sheet 20 is a polygonal open area.
  • the polygonal opening areas may be evenly arranged on the reflective sheet body 201, and at least one movable blade connected thereto may be disposed in each of the polygonal opening areas.
  • the embodiment of the present invention may also provide the movable blade only in a part of the opening area, for example, an opening area located in the middle of the reflection sheet body 201, so as to reduce the effect of the positioning column on the light reflection interference.
  • opening and closing structure 202 including the movable blade is disposed in each of the opening regions, or the opening and closing structure 202 including the movable blade is disposed only in a part of the opening region. All are within the protection scope of the present invention.
  • the opening and closing structure 202 can be a movable blade that matches the polygonal opening area.
  • the matching of the movable blade with the polygonal opening area means that the shape and size of the movable blade match the shape and size of the polygonal opening area, that is, the movable type.
  • the blade and the polygonal opening area may completely coincide in a closed state.
  • the scope of protection of the present invention is not limited thereto, and it may be that the area of the movable blade is slightly smaller than the area of the polygonal opening area, as long as the projection of the movable blade in the closed state can be completely fallen.
  • the range covered by the polygonal opening area may be, and the others are not further limited.
  • the opening and closing structure 202 may be a rectangular movable type blade that matches the rectangular opening area.
  • One side of the rectangular movable blade is connected to the edge of the open area in the reflector body 201, and the other three sides of the rectangular movable blade are in a free connection state.
  • the positioning post below the opening and closing structure 202 pushes the rectangular movable blade through the opening area, since the rectangular movable blade has only one side
  • the reflection sheet body 201 is connected so that it is inclined toward the side of the connection side to reflect light from the side of the connection side.
  • the opening and closing structure 202 includes a plurality of movable blades (eg, 4); wherein the number of movable blades is the same as the number of sides of the polygonal opening region, and each of the movable blades is respectively connected to each side of the polygonal opening region.
  • the positioning post below the opening and closing structure 202 pushes up the movable blade through the opening area, there are movable blades for reflecting light in a plurality of directions of the positioning column. In this way, the light in all directions can be uniformly reflected, thereby achieving uniform light output.
  • the plurality of movable blades match the polygonal opening area in a closed state.
  • the shape of the plurality of movable blades may be a triangle or any other shape, but it should be ensured that the shape of the plurality of movable blades is matched with the shape of the polygonal opening region; that is, the plurality of activities
  • the shapes of the blades are complementary, that is, the mutually adjacent sides between the adjacent movable blades coincide with each other to constitute a shape matching the polygonal opening area.
  • the plurality of movable blades may each be a triangular movable blade.
  • the open area is a polygonal open area, it is easier to implement the triangular movable blade in the polygonal open area than other shapes, so that the design of the movable blade can be simplified.
  • the adjacent sides of the adjacent triangular movable blades may completely coincide in the closed state; that is, the graphics formed by the four triangular movable blades in the closed state may completely overlap the polygonal opening area.
  • the triangular movable blade can reflect the surrounding light to the maximum extent in the open state, thereby obtaining uniform reflected light and improving the display effect.
  • the reflective sheet 20 may further include a plurality of openings 203 on the reflective sheet body 201; the plurality of openings 203 are distributed in an array on the reflective sheet body 201. on.
  • the opening 203 is mainly used to pass a point light source such as a light emitting diode in the backlight module, so the shape of the opening 203 should depend on the shape of the light emitting diode.
  • the shape of the opening 203 may include, for example, any of a triangle, a circle, an ellipse, a rectangle, and the like.
  • the opening 203 and the opening and closing structure 202 may be alternately arranged on the reflective sheet body 201 in units of rows, and the opening 203 and the opening and closing structure 202 are opposite in the direction of the column; or The opening 203 and the opening and closing structure 202 may also be alternately arranged on the reflective sheet body 201 in units of columns, and the opening 203 and the opening and closing structure 202 are opposite in the row direction. .
  • the opening 203 and the opening and closing structure 202 can be alternately arranged in a certain direction in order to keep the brightness of the light on both sides substantially the same, which is advantageous for achieving uniform reflection of light.
  • the embodiment of the present invention further provides a backlight module, as shown in FIG. 5 and FIG. 6, comprising a backing plate 10 and a plurality of positioning posts 30 fixed on the backing plate 10, and the reflection sheet 20 described above.
  • a backlight module as shown in FIG. 5 and FIG. 6, comprising a backing plate 10 and a plurality of positioning posts 30 fixed on the backing plate 10, and the reflection sheet 20 described above.
  • the position of the positioning post 30 corresponds to the position of the opening and closing structure 202 of the reflective sheet 20, and the positioning post 30 is used to pass through the open area 200 of the reflective sheet 20 to open the opening and closing structure 202. .
  • the position of the positioning post 30 corresponds to the position of the opening and closing structure 202 of the reflective sheet 20, and each of the positioning posts 30 necessarily has the opening and closing structure 202 corresponding thereto.
  • each of the opening and closing structures 202 does not necessarily have the positioning post 30 corresponding thereto; that is, the opening and closing structure 202 and the positioning post 30 may correspond one-to-one, or the opening
  • the number of structures 202 can be greater than the number of the positioning posts 30.
  • the opening and closing structure 202 corresponding to the positioning post 30 can be used to pass the positioning post 30 and block the position.
  • the surface of the positioning post 30, the opening and closing structure 202 not corresponding to the positioning post 30 may provide a release space for providing thermal stress to the thermal expansion of the reflective sheet 20, thereby preventing the reflective sheet 20 from being deformed by heat. The resulting light is unevenly reflected.
  • the backlight module further includes a light source 50 and an optical film 40; the light source 50 includes a plurality of light emitting diodes arranged in an array.
  • the positions of the plurality of light emitting diodes may be in one-to-one correspondence with the positions of the openings 203 of the reflective sheet 20.
  • the shape and size of the opening 203 need to be based on the shape and size of the light emitting diode, so that the light emitting diode can be just passed through the opening 203.
  • the optical film 40 may include a diffusion sheet, a prism sheet, a brightness enhancement film, and the like, and may be arbitrarily combined according to actual needs. Based on this, the optical film 40 can be fixed by a plastic frame (not shown), and the plastic frame can be fixedly engaged in the back plate 10.
  • Embodiments of the present invention also provide a display device, as shown in FIGS. 7 and 8, including a display panel 60 and the above-described backlight module.
  • the display device may be a non-self-illuminating display device such as a liquid crystal display or a liquid crystal television.
  • the backlight module provided by the embodiment of the present invention provides a backlight, which can effectively weaken the device.
  • the interference effect of the positioning post 30 on the light reflection effect is such that the viewer does not see the contour afterimage of the positioning post 30 on the display screen side, thereby improving the display quality.
  • a release space for providing thermal stress to the thermal expansion of the reflective sheet 20 may be provided, thereby effectively preventing thermal deformation of the reflective sheet 20. Achieve uniform light output.

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

Abstract

一种反射片、背光模组和显示装置。该反射片(20)包括提供有多个开口区域的反射片本体(201)和位于每个开口区域中的开合结构(202)。所述开合结构(202)包括至少一个活动式叶片，且所述活动式叶片的一边与所述反射片本体(201)中开口区域的边缘相连。所述活动式叶片具有反射面，且所述活动式叶片的反射面与所述反射片本体的反射片位于同侧。该反射片可减弱定位柱对光线反射效果的干扰作用，从而获得良好的显示效果。

Description

反射片、背光模组和显示装置 技术领域
本发明实施例涉及一种反射片、包括该反射片的背光模组、和包括该背光模组的显示装置。
背景技术
根据背光模组中光源的设置位置，所述背光模组可以分为侧光式和直下式两种。直下式背光模组是将光源设置在液晶显示面板的正下方，以使液晶显示面板可以获得较高的光源强度，因此这类液晶显示产品多用于电脑显示屏以及液晶电视等高亮度需求的显示器中。
在大尺寸液晶显示产品中，如图1所示，为了避免在显示器件搬运的过程中因震动而引起背光模组中的光源50与反射片20之间的错位，现有的直下式背光模组中，背板10上设置有定位柱30，位于背板10之上的反射片20在对应所述定位柱30的位置处相应的设置有多个开口区域200，所述定位柱30的顶端穿过所述开口区域200，用于固定所述反射片20。
但是，所述定位柱30通常采用透明材料制备，而透明定位柱存在于反射片20和光源50之间，会影响光线的反射效果，使得观看者在显示屏幕一侧可能看到定位柱30的轮廓残影，从而导致显示效果不佳。
发明内容
一方面，提供一种反射片，包括提供有多个开口区域的反射片本体和设置于每个开口区域中的开合结构；所述开合结构包括至少一个活动式叶片，且所述活动式叶片的一边与所述反射片本体中开口区域的边缘相连；所述活动式叶片具有反射面，且所述活动式叶片的反射面与所述反射片本体的反射面设置于同侧。
在一个示例中，所述开口区域为多边形开口区域。
在一个示例中，所述开合结构为一个与所述多边形开口区域相匹配的活动式叶片。
在一个示例中，所述开合结构包括多个活动式叶片；所述活动式叶片的数量与所述多边形开口区域的边数相同，且所述多个活动式叶片分别与所述多边形开口区域的一边缘相接。
在一个示例中，所述多个活动式叶片在闭合状态下与所述多边形开口区域相匹配。
在一个示例中，所述多个活动式叶片均为三角形活动式叶片。
在一个示例中，所述反射片还包括设置于所述反射片本体上的多个开孔；所述多个开孔呈阵列式分布在所述反射片本体上。
在一个示例中，所述开孔与所述开合结构以行为单位交替排列在所述反射片本体上，且所述开孔和所述开合结构在列的方向上正对；或者，所述开孔与所述开合结构以列为单位交替排列在所述反射片本体上，且所述开孔和所述开合结构在行的方向上正对。
另一方面，提供一种背光模组，包括背板和固定在所述背板上的多个定位柱；所述背光模组还包括上述的反射片；其中，所述定位柱的位置与所述反射片的开合结构的位置相对应，所述定位柱用于穿出所述反射片的开口区域，以打开所述开合结构。
在一个示例中，所述开合结构的数量大于所述定位柱的数量。
在一个示例中，其中所述反射片还包括设置于所述反射片本体上的多个开孔，所述背光模组还包括光源和光学膜片；所述光源包括阵列排布的多个发光二极管；其中，在所述反射片包括开孔的情况下，所述多个发光二极管的位置与所述反射片的开孔位置一一对应。
再一方面，提供一种显示装置，包括上述的背光模组。
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为现有背光模组的结构示意图；
图2为本发明实施例提供的一种反射片的结构示意图；
图3为本发明实施例提供的另一种反射片的结构示意图；
图4为图2所示的反射片中的开合结构在开启状态下的结构示意图；
图5为本发明实施例提供的一种背光模组的结构示意图；
图6为本发明实施例提供的另一种背光模组的结构示意图；
图7为本发明实施例提供的一种显示装置的结构示意图；
图8为本发明实施例提供的另一种显示装置的结构示意图。
附图标记：
10-背板；20-反射片；200-开口区域；201-反射片本体；202-开合结构；203-开孔；30-定位柱；40-光学膜片；50-光源；60-显示面板。
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，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于所描述的实施例，本领域普通技术人员在没有做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。
本发明的实施例将提供一种反射片、背光模组和显示装置，可减弱定位柱对光线反射效果的干扰作用，以使观看者在显示屏幕一侧不会看到定位柱的轮廓残影，从而获得良好的显示效果。
本发明的实施例提供一种反射片20，如图2和图3所示，包括提供有多个开口区域的反射片本体201和位于开口区域中的开合结构202；所述开合结构202包括至少一个活动式叶片，且所述活动式叶片的一边与所述反射片本体201中开口区域的边缘相连；所述活动式叶片具有反射面，且所述活动式叶片的反射面与所述反射片本体201的反射面位于同侧。
所述开口区域的开合结构202可以根据实际情况呈现出开启和闭合两种状态。在所述开合结构202的下方对应设置有定位柱或其它结构的情况下，所述开合结构202的活动式叶片会被穿出所述开口区域的定位柱或其它结构顶起，从而处于开启状态；在所述开合结构202的下方未设置定位柱或其它结构的情况下，所述开合结构202的活动式叶片便会落下，与所述反射片本体201位于同一平面，从而处于闭合状态。
所述活动式叶片的一边与所述反射片本体201中开口区域的边缘相连，是为了保证在所述活动式叶片被例如定位柱顶起的情况下，所述活动式叶片可以不受外力的束缚而达到开启状态。
当所述反射片20应用于液晶显示装置中的背光模组时，所述开口区域的位置应与所述背光模组中的定位柱的位置相对应。例如，可以包括以下两种情况：所述开口区域的位置与所述定位柱的位置一一对应；或者，所述开口区域的位置除了对应于所述定位柱的位置，还对应于未设置所述定位柱的位置。基于此可知，在本发明的实施例中，所述开口区域的数量大于或等于所述定位柱的数量。
所述开口区域的形状可以包括多种形状，但应保证所述背光模组中的定位柱可以穿过所述开口区域来限定所述反射片20的位置，使其不会发生相对移动。例如，在所述定位柱为圆柱形定位柱的情况下，所述开口区域的形状可以为与所述圆柱形定位柱的形状相匹配的圆形开口，但也可以为与所述圆柱形定位柱的侧面相接触的外切三角形或者矩形等其它形状，只要可以保证所述开口区域相对于所述定位柱在平行于所述反射片20的平面上无法发生相对移动即可。
相应地，所有活动式叶片组成的形状可以与所述开口区域的形状相同，但也可以不同，只要可以保证所有所述活动式叶片在其闭合状态下能够完全落入所述开口区域的范围之内即可，这里对于每个所述活动式叶片的实际形状不做具体限定。
所述反射片本体201和所述开合结构202可由反射材料制成，例如银、铝、金、铬、铜、铟、铱、镍、铂、锡等金属或合金材料。或者，在反射片本体201或开合结构202上涂覆一层反射涂层，例如耐黄化且耐热的白色反射漆料，只要其具有良好的反射效果和稳定的物化性质即可。在一个示例中，所述反射片本体201和所述开合结构202由相同的反射材料形成。
当本发明的实施例提供的所述反射片20应用于背光模组时，固定在背板上的定位柱可以穿出所述开口区域以将所述开合结构202打开；基于此，所述开合结构202中的活动式叶片便会被所述定位柱顶起，从而遮挡在所述定位柱的表面，使其不会直接暴露于光源之间，这样可以有效的减弱定位柱对于光线反射效果的干扰作用，以使观看者在显示屏幕一侧不会看到定位柱的 轮廓残影，从而改善显示品质。
在一个示例中，所述反射片20中的开口区域为多边形开口区域。
所述多边形开口区域可以均匀的排布在所述反射片本体201上，且每个所述多边形开口区域中均可以设置至少一个与其相连的活动式叶片。
当然，本发明的实施例也可以仅在部分开口区域例如位于所述反射片本体201中间的开口区域中设置所述活动式叶片，以达到降低定位柱对光线反射干扰的效果。
这里需要说明的是，无论是每个所述开口区域中均设置包括所述活动式叶片的开合结构202，还是仅在部分所述开口区域中设置包括所述活动式叶片的开合结构202，均在本发明的保护范围之内。
如图2所示，所述开合结构202可以为一个与所述多边形开口区域相匹配的活动式叶片。
这里需要说明的是，所述活动式叶片与所述多边形开口区域相匹配具体是指，所述活动式叶片的形状和尺寸与所述多边形开口区域的形状和尺寸相匹配，即所述活动式叶片与所述多边形开口区域在闭合状态下可以完全重合。但本发明的保护范围并不限于此，其还可以是所述活动式叶片的面积略小于所述多边形开口区域的面积，只要可以保证所述活动式叶片在闭合状态下的投影可以完全落入所述多边形开口区域覆盖的范围即可，其它不做进一步限定。
示例的，参考图2所示，在所述反射片20中的开口区域为矩形开口区域的情况下，所述开合结构202可以为一个与所述矩形开口区域相匹配的矩形活动式叶片。所述矩形活动式叶片的一边与所述反射片本体201中开口区域的边缘相连，所述矩形活动式叶片的其它三边处于自由无连接状态。在此情况下，如图4所示，当所述开合结构202下方的定位柱穿过所述开口区域将所述矩形活动式叶片顶起时，由于所述矩形活动式叶片仅有一边与所述反射片本体201相连，因此其会向该连接边一侧倾斜，从而对来自于上述连接边一侧的光线进行反射。
考虑到在实际应用中，所述背光模组中的定位柱的四周都存在需要反射的光线，而仅保证所述定位柱一侧的光线进行反射，并不能达到最佳的显示效果；为此，参考图3所示，所述开合结构202包括多个活动式叶片(例如 4个)；其中，所述活动式叶片的数量与所述多边形开口区域的边数相同，且每个所述活动式叶片分别与所述多边形开口区域的每条边相接。
这样，当所述开合结构202下方的定位柱穿过所述开口区域将所述活动式叶片顶起时，在所述定位柱的多个方向上均存在用于反射光线的活动式叶片，这样便可以对各个方向的光线进行均匀的反射，从而实现均匀出光。所述多个活动式叶片在闭合状态下与所述多边形开口区域相匹配。
所述多个活动式叶片的形状可以为三角形或者其它任意形状，但应保证所述多个活动式叶片组成的形状与所述多边形开口区域的形状相匹配；也就是说，所述多个活动式叶片的形状互补，即相邻所述活动式叶片之间相互靠近的边相互重合，从而组成与所述多边形开口区域相匹配的形状。
例如，所述多个活动式叶片可以均为三角形活动式叶片。
由于所述开口区域为多边形开口区域，而将所述三角形活动式叶片设置在所述多边形开口区域中相比于其它形状更易于实现，从而可以简化所述活动式叶片的设计。
相邻所述三角形活动式叶片的相邻边在闭合状态下可以完全重合；也就是说，该四个所述三角形活动式叶片在闭合状态下组成的图形可以与所述多边形开口区域完全重叠，这样可使所述三角形活动式叶片在开启状态下最大程度的反射四周的光线，从而获得均匀的反射光线，改善显示效果。
参考图2和图3所示，所述反射片20还可以包括位于所述反射片本体201上的多个开孔203；所述多个开孔203呈阵列式分布在所述反射片本体201上。
所述开孔203主要用于使背光模组中的点光源例如发光二极管穿过，因此所述开孔203的形状应取决于所述发光二极管的形状。所述开孔203的形状例如可以包括三角形、圆形、椭圆形、矩形等任一种形状。
所述开孔203与所述开合结构202可以以行为单位交替的排列在所述反射片本体201上，且所述开孔203和所述开合结构202在列的方向上正对；或者，所述开孔203与所述开合结构202也可以以列为单位交替排列在所述反射片本体201上，且所述开孔203和所述开合结构202在行的方向上正对。
这样，所述开孔203和所述开合结构202可以沿某一方向依次交替排布，以使两侧的光线亮度基本保持相同，这样有利于实现光线的均匀反射。
本发明的实施例还提供一种背光模组，如图5和图6所示，包括背板10和固定在所述背板10上的多个定位柱30，以及上述的反射片20。
所述定位柱30的位置与所述反射片20的开合结构202的位置相对应，所述定位柱30用于穿出所述反射片20的开口区域200，以打开所述开合结构202。
这里需要说明的是，所述定位柱30的位置与所述反射片20的开合结构202的位置相对应是指，每个所述定位柱30必然存在与之对应的所述开合结构202，但每个所述开合结构202不一定存在与之对应的所述定位柱30；也就是说，所述开合结构202和所述定位柱30之间可以一一对应，或者所述开合结构202的数量可以大于所述定位柱30的数量。
在所述开合结构202的数量大于所述定位柱30的数量的情况下，与所述定位柱30对应的所述开合结构202可以用于使所述定位柱30穿出并遮挡在所述定位柱30的表面，未与所述定位柱30对应的所述开合结构202可以为所述反射片20的受热膨胀提供热应力的释放空间，从而避免所述反射片20因受热变形而引起的光线反射不均。
参考图5和图6所示，所述背光模组还包括光源50和光学膜片40；所述光源50包括阵列排布的多个发光二极管。
在所述反射片20包括开孔203的情况下，所述多个发光二极管的位置可以与所述反射片20的开孔203位置一一对应。当然，所述开孔203的形状和尺寸需要以所述发光二极管的形状和尺寸为准，以恰好能够使所述发光二极管从所述开孔203中穿过为佳。
这里，所述光学膜片40可以包括扩散片、棱镜片、增亮膜等，根据实际需要可以进行任意组合。在此基础上，所述光学膜片40可以通过胶框(图中未示出)进行固定，而所述胶框可以固定卡合在所述背板10之中。
本发明的实施例还提供一种显示装置，如图7和图8所示，包括显示面板60和上述的背光模组。
这里需要说明的是，所述显示装置可以为液晶显示器或者液晶电视等非自发光型的显示装置，通过采用本发明的实施例提供的所述背光模组为其提供背光，可以有效的减弱所述定位柱30对于光线反射效果的干扰作用，以使观看者在显示屏幕一侧不会看到定位柱30的轮廓残影，从而改善显示品质。 当所述开合结构202的数量小于所述定位柱30的数量时，还可以为所述反射片20的受热膨胀提供热应力的释放空间，从而有效的防止所述反射片20的受热变形，实现均匀出光。
以上所述仅是本发明的示范性实施方式，而非用于限制本发明的保护范围，本发明的保护范围由所附的权利要求确定。
本申请基于并且要求于2014年9月30日递交的中国专利申请第201420575536.1号的优先权，在此全文引用上述中国专利申请公开的内容。

Claims (12)

  1. 一种反射片，包括提供有多个开口区域的反射片本体和设置于每个开口区域中的开合结构；
    所述开合结构包括至少一个活动式叶片，且所述活动式叶片的一边与所述反射片本体中开口区域的边缘相连；所述活动式叶片具有反射面，且所述活动式叶片的反射面与所述反射片本体的反射面设置于同侧。
  2. 根据权利要求1所述的反射片，其中所述开口区域为多边形开口区域。
  3. 根据权利要求2所述的反射片，其中所述开合结构为一个与所述多边形开口区域相匹配的活动式叶片。
  4. 根据权利要求2所述的反射片，其中所述开合结构包括多个活动式叶片，所述活动式叶片的数量与所述多边形开口区域的边数相同，且所述多个活动式叶片分别与所述多边形开口区域的一边缘相接。
  5. 根据权利要求4所述的反射片，其中所述多个活动式叶片在闭合状态下与所述多边形开口区域相匹配。
  6. 根据权利要求5所述的反射片，其中所述多个活动式叶片均为三角形活动式叶片。
  7. 根据权利要求1-6任一项所述的反射片，还包括设置于所述反射片本体上的多个开孔，所述多个开孔呈阵列式分布在所述反射片本体上。
  8. 根据权利要求7所述的反射片，其中所述开孔与所述开合结构以行为单位交替排列在所述反射片本体上，且所述开孔和所述开合结构在列的方向上正对；
    或者，所述开孔与所述开合结构以列为单位交替排列在所述反射片本体上，且所述开孔和所述开合结构在行的方向上正对。
  9. 一种背光模组，包括背板和固定在所述背板上的多个定位柱；还包括权利要求1-8任一项所述的反射片；
    其中，所述定位柱的位置与所述反射片的开合结构的位置相对应，所述定位柱用于穿出所述反射片的开口区域，以打开所述开合结构。
  10. 根据权利要求9所述的背光模组，其中所述开合结构的数量大于所述定位柱的数量。
  11. 根据权利要求9所述的背光模组，其中所述反射片还包括设置于所述反射片本体上的多个开孔，所述背光模组还包括光源和光学膜片，所述光源包括多个发光二极管，所述多个发光二极管的位置与所述反射片的多个开孔的位置一一对应。
  12. 一种显示装置，包括权利要求9-11任一项所述的背光模组。
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