WO2012126199A1 - 背光模组及液晶显示装置 - Google Patents
背光模组及液晶显示装置 Download PDFInfo
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- WO2012126199A1 WO2012126199A1 PCT/CN2011/074351 CN2011074351W WO2012126199A1 WO 2012126199 A1 WO2012126199 A1 WO 2012126199A1 CN 2011074351 W CN2011074351 W CN 2011074351W WO 2012126199 A1 WO2012126199 A1 WO 2012126199A1
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- WO
- WIPO (PCT)
- Prior art keywords
- light guide
- guide plates
- plate
- light
- backlight module
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- Ceased
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Classifications
-
- 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
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0078—Side-by-side arrangements, e.g. for large area displays
-
- 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
- G02B6/0051—Diffusing sheet or layer
Definitions
- the present invention relates to the field of liquid crystal display, and in particular to a backlight module and a liquid crystal display device using the same.
- liquid crystal display devices have been widely used in various electronic products such as computer monitors, televisions, notebook computers, mobile phones, and digital cameras due to their advantages of lightness, power saving, and low radiation. Since the liquid crystal itself does not emit light, a backlight module is required to provide a surface light source for the liquid crystal display device.
- the backlight module usually adopts two kinds of light input modes, that is, an edge light type and a direct type.
- the use of a sidelight type backlight module requires the use of a light guide plate, resulting in an increase in the weight of the liquid crystal display device and difficulty in achieving local dimming.
- the direct-lit backlight module uses a larger number of LEDs to increase the cost, and the backlight module needs to be thicker when a good light mixing effect is required.
- the technical problem to be solved by the present invention is to provide a backlight module and a liquid crystal display device which are light and thin, can easily realize area brightness control, and have low cost.
- one technical solution of the present invention is to provide a backlight module, including: two light guide plates, the two light guide plates are spaced apart, and each of the light guide plates is disposed adjacent to another light guide plate. a first side surface and a second side opposite to the first side surface and away from the other light guide plate; two sets of first light sources respectively disposed adjacent to the second side surfaces of the two light guide plates, and respectively provided for the two light guide plates a diffusing plate disposed between the first sides of the two light guide plates; a second light source disposed under the diffusing plate and providing light to the diffusing plate; the optical film disposed above the light guide plate and the diffusing plate
- the back plate is disposed under the light guide plate and the second light source, and supports the light guide plate and the second light source.
- the first side surface of each of the two light guide plates is respectively provided with a first support structure, and both ends of the diffusion plate are supported on the first support structure.
- the backboard includes two first support portions spaced apart from each other and a second support portion that is recessed between the two first support portions, wherein the two light guide plates are respectively supported by two On the first support portion, the second light source is supported on the second support portion.
- the backing plate further includes a second supporting structure, and the other ends of the diffusing plate are supported on the second supporting structure.
- a backlight module including: two light guide plates, the two light guide plates are spaced apart, and each of the light guide plates includes a light guide plate adjacent to each other. a first side surface disposed opposite to the first side surface and away from the other side of the other light guide plate; two sets of first light sources respectively disposed adjacent to the second side surfaces of the two light guide plates, and respectively two light guide plates Providing light; a diffusion plate disposed between the first sides of the two light guide plates; and a second light source disposed under the diffusion plate and providing light to the diffusion plate.
- the first side surfaces of the two light guide plates are respectively provided with a first support structure, and both ends of the diffusion plate are supported on the first support structure.
- the first support structure is a stepped structure, the height of the stepped structure being equal to the height of the diffuser plate.
- the first support structure projects downwardly from the light guide.
- the backlight module further includes an optical film disposed above the light guide plate and the diffusion plate.
- the backlight module further includes a back plate disposed under the light guide plate and the second light source, and supporting the light guide plate and the second light source.
- the backboard includes two first support portions spaced apart from each other and a second support portion that is recessed between the two first support portions, wherein the two light guide plates are respectively supported by the On the two first supporting portions, the second light source is supported on the second supporting portion.
- the backing plate further comprises a second support structure, Both ends are supported on the second support structure.
- the light provided by the first light source enters the diffuser plate through the light guide plate.
- the liquid crystal display device includes a backlight module, and the backlight module includes: two light guide plates, and the two light guide plates are spaced apart
- Each of the light guide plates includes a first side disposed adjacent to the other light guide plate and a second side opposite to the first side surface and away from the other light guide plate; two sets of first light sources, respectively, and two second light guide plates
- the side surfaces are adjacently disposed, and respectively provide light to the two light guide plates;
- the diffusion plate is disposed between the first side surfaces of the two light guide plates; and the second light source is disposed under the diffusion plate and provides light to the diffusion plate.
- the first side surfaces of the two light guide plates are respectively provided with a first support structure, and both ends of the diffusion plate are supported on the first support structure.
- the backlight module further includes an optical film disposed above the light guide plate and the diffusion plate.
- the backlight module further includes a back plate disposed under the light guide plate and the second light source, and supporting the light guide plate and the second light source.
- the backboard includes two first support portions spaced apart from each other and a second support portion that is recessed between the two first support portions, wherein the two light guide plates are respectively supported by two On the first support portion, the second light source is supported on the second support portion.
- the backing plate further includes a second supporting structure, and the other ends of the diffusing plate are supported on the second supporting structure.
- the light provided by the first light source enters the diffuser plate through the light guide plate.
- the invention has the beneficial effects that the backlight module and the liquid crystal display device of the invention can simultaneously adopt the side-light type and the direct-cut type light-injecting mode, and have the advantages of lightness and thinness, easy realization of area brightness control and cost. Low advantage.
- FIG. 1 is a structural view of a first embodiment of a backlight module of the present invention
- FIG. 2 is a structural view of a second embodiment of a backlight module of the present invention.
- Fig. 3 is a structural view showing a third embodiment of the backlight module of the present invention.
- FIG. 1 is a structural diagram of a first embodiment of a backlight module of the present invention.
- the backlight module 10 of the present embodiment includes: two light guide plates 11 and 12 , two sets of first light sources 13 and 14 , a diffusion plate 15 , a second light source 16 , an optical film 17 , and a back plate 18 . .
- the light guide plates 11, 12 are wedge-shaped light guide plates and are spaced apart in the horizontal direction.
- the light guide plate 11 includes a first side 111 and a second side 112.
- the first side surface 111 is disposed adjacent to the light guide plate 12, and the second side surface 112 is opposite to the first side surface 111 and disposed away from the light guide plate 12.
- the first side surface 111 is further provided with a first support structure 113.
- the light guide plate 12 includes a first side 121 and a second side 122.
- the first side surface 121 is disposed adjacent to the light guide plate 11, and the second side surface 122 is opposite to the first side surface 121 and disposed away from the light guide plate 11.
- the first support structure 123 is further disposed on the first side surface 121.
- the first light source 13 is disposed adjacent to the second side 112 of the light guide plate 11 to provide light to the light guide plate 11.
- the first light source 14 is disposed adjacent to the second side 122 of the light guide plate 12 to provide light to the light guide plate 12.
- the first light source 13, 14 may be a single or multiple LED or cold cathode fluorescent tube (CCFL).
- the diffusion plate 15 is disposed between the first side surface 111 of the light guide plate 11 and the first side surface 121 of the light guide plate 12. Moreover, in the present embodiment, both ends of the diffusion plate 15 are supported on the first support structure 113 and the first support structure 123.
- the first supporting structure 113 and the first supporting structure 123 are stepped structures, and the height of the stepped structure is equal to the height of the diffusing plate 15 so that the top surface (light emitting surface) of the light guiding plates 11 and 12 The top surface (light-emitting surface) of the diffusion plate 15 is on the same horizontal plane.
- the height of the diffusion plate 15 is smaller than the thickness of the light guide plates 11 and 12 at the first side faces 111 and 121, so that the first support structures 113 and 123 can be directly formed on the light guide plates 11 and 12.
- the diffusion plate 15 may be supported between the first sides 111, 121 of the light guide plates 11, 12 by other means, such as glue, inlay, or the like.
- the second light source 16 is disposed below the diffuser panel 15 to provide light to the diffuser panel 15.
- the second light source 16 can be a plurality of LEDs or a plurality of cold cathode fluorescent tubes (CCFLs).
- the optical film 17 is disposed above the light guide plates 11, 12 and the diffusion plate 15.
- the optical film 17 can be any combination of various optical films known in the art such as a diffusion sheet, a brightness enhancement sheet or a compensation sheet.
- the back plate 18 is disposed under the light guide plates 11, 12 and the second light source 16, for supporting the light guide plates 11, 12 and the second light source 16.
- the back plate 18 includes two first support portions 181 and 182 spaced apart from each other, and a second support portion 183 between the two first support portions 181 and 182 and recessed downward, wherein the light guide plates 11 and 12 Supported on the first support portions 181, 182, respectively, the second light source 16 is supported on the second support portion 183.
- the first support portions 181, 182 are disposed obliquely to match the inclined bottom surfaces of the light guide plates 11, 12.
- the backing plate 18 can further support the first light sources 13, 14.
- a second supporting structure (not shown) may be further disposed on the back plate 18, and the second supporting structure is used to support the other ends of the diffusing plate 15 to improve the fixing effect of the diffusing plate 15.
- the light provided by the first light sources 13, 14 enters the inside of the light guide plates 11, 12 through the second side faces 112, 122 of the light guide plates 11, 12, respectively, and the dots on the bottom surface of the light guide plates 11, 12 or the like.
- the scattering effect of the scattering structure and the reflective coating on the surface of the backing plate 18 or the reflection of the reflecting sheet between the backing plate 18 and the light guiding plates 11 and 12 are emitted through the top surfaces of the light guiding plates 11, 12.
- the light emitted from the top surface of the light guide plates 11, 12 is supplied to the liquid crystal panel (not shown) via the optical film 17.
- the light supplied from the second light source 16 enters the inside of the diffusion plate 15 through the bottom surface of the diffusion plate 15 in a straight downward manner, and is emitted through the top surface of the diffusion plate 15 after the diffusion of the diffusion plate 15.
- the light emitted through the top surface of the diffusing plate 15 is supplied to the liquid crystal panel (not shown) via the optical film 17.
- the distance between the second light source 16 and the diffusion plate 15 needs to be determined according to the type of the optical film 17, the second light source 16, and the diffusion plate 15, and is obtained by debugging, and the distance is often larger than the thickness of the light guide plates 11, 12. .
- a second support portion 183 recessed downward is disposed on the back plate 18 to support the second light source 16, and the recess depth of the second support portion 183 is set according to the debugging result, thereby causing the second light source 16 to diffuse. Maintain proper distance between the plates 15.
- the first side surfaces 111, 121 of the light guide plates 11, 12 are not provided with a reflection sheet or a reflective coating, so that part of the light provided by the first light sources 13, 14 can enter the diffusion plate 15 through the light guide plates 11, 12. And being mixed with the light provided by the second light source 16, and then emitted through the top surface of the diffusion plate 15. In this way, the brightness uniformity of the bonding position of the light guide plates 11, 12 and the diffusion plate 15 can be sufficiently improved.
- FIG. 2 is a structural diagram of a second embodiment of a backlight module of the present invention.
- the backlight module 20 of the second embodiment is different from the backlight module 10 of the first embodiment in that: the height of the diffusion plate 25 is substantially equal to the light guide plate 21 at the first side faces 211, 221, The thickness of 22, so that the first support structures 213, 223 are disposed to protrude downward from the light guide plates 21, 22 to ensure the top surface (light-emitting surface) of the light guide plates 21, 22 and the top surface (light-emitting surface) of the diffusion plate 25 At the same level.
- FIG. 3 is a structural diagram of a third embodiment of a backlight module according to the present invention.
- the backlight module 30 of the third embodiment is different from the backlight module 10 of the first embodiment in that: in this embodiment, the light guide plates 31, 32 are used as a flat light guide plate.
- the backlight module of the present invention uses both the side-light type and the direct-lit type light-injecting method, and avoids the thickness increase due to the need of a long light-mixing distance when all the direct-lighting light-in methods are used.
- the problem is that it is light and low cost.
- the first light source and the second light source can be independently controlled, and have the advantage of easily achieving area brightness control.
- the present invention still further provides a liquid crystal display device using the above backlight module.
- the above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the specification and the drawings of the present invention may be directly or indirectly applied to other related technologies.
- the scope of the invention is included in the scope of patent protection of the present invention.
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Description
背光模组及液晶显示装置
【技术领域】
本发明涉及液晶显示领域, 特别是涉及一种背光模组及应用该背光模组的 液晶显示装置。
【背景技术】
目前, 液晶显示装置凭借轻薄、 省电、 低辐射等优点, 已广泛应用于电脑 显示器、 电视机、 笔记本电脑、 移动电话、 数码相机等各种电子产品。 由于液 晶本身不发光, 因此需要背光模组为液晶显示装置提供面光源。
现有技术中, 背光模组通常釆用两种入光方式, 即侧光式和直下式。其中, 釆用侧光式的背光模组需要使用导光板, 导致液晶显示装置的重量增加、 不易 实现区域亮度控制 ( local dimming )。 釆用直下式的背光模组因为要使用较多颗 数的 LED, 进而提高成本, 而且在需要很好的混光效果时, 背光模组需要设置 得比较厚。 目前还没有一种轻薄、 可易于实现区域亮度控制且成本低的背光模 组。
【发明内容】
本发明主要解决的技术问题是提供一种背光模组及液晶显示装置, 其具有 轻薄、 可易于实现区域亮度控制且成本低的优点。
为解决上述技术问题,本发明釆用的一个技术方案是:提供一种背光模组, 包括: 两个导光板, 该两个导光板间隔设置, 每一导光板分别包括靠近另一导 光板设置的第一侧面以及与第一侧面相对且远离另一导光板设置的第二侧面; 两组第一光源, 分别与两个导光板的第二侧面相邻设置, 并分别为两个导光板 提供光线; 扩散板, 设置于该两个导光板的第一侧面之间; 第二光源, 设置于 扩散板的下方, 并为扩散板提供光线; 光学膜片, 设置于导光板和扩散板的上 方; 背板, 设置于导光板和第二光源的下方, 并支撑导光板和第二光源。
根据本发明一优选实施例, 两个导光板的第一侧面上分别设置有第一支撑 结构, 扩散板的两端支撑于第一支撑结构上。
根据本发明一优选实施例, 背板包括间隔设置的两个第一支撑部以及位于 两个第一支撑部之间且向下凹陷的第二支撑部, 其中两个导光板分别支撑于两 个第一支撑部上, 第二光源支撑于第二支撑部上。
根据本发明一优选实施例, 背板进一步包括第二支撑结构, 扩散板的另外 两端支撑于第二支撑结构上。
为解决上述技术问题, 本发明釆用的另一个技术方案是: 提供一种背光模 组, 包括: 两个导光板, 该两个导光板间隔设置, 每一导光板分别包括靠近另 一导光板设置的第一侧面以及与第一侧面相对且远离另一导光板设置的第二侧 面; 两组第一光源, 分别与两个导光板的第二侧面相邻设置, 并分别为两个导 光板提供光线; 扩散板, 设置于该两个导光板的第一侧面之间; 第二光源, 设 置于扩散板的下方, 并为扩散板提供光线。
根据本发明一优选实施例, 该两个导光板的第一侧面上分别设置有第一支 撑结构, 扩散板的两端支撑于第一支撑结构上。
根据本发明一优选实施例, 第一支撑结构为阶梯结构, 阶梯结构的高度等 于扩散板的高度。
根据本发明一优选实施例, 第一支撑结构向下凸出于导光板。
根据本发明一优选实施例, 背光模组进一步包括光学膜片, 光学膜片设置 于导光板和扩散板的上方。
根据本发明一优选实施例, 背光模组进一步包括背板, 背板设置于导光板 和第二光源的下方, 并支撑导光板和第二光源。
根据本发明一优选实施例, 背板包括间隔设置的两个第一支撑部以及位于 该两个第一支撑部之间且向下凹陷的第二支撑部, 其中两个导光板分别支撑于 该两个第一支撑部上, 第二光源支撑于第二支撑部上。
根据本发明一优选实施例, 背板进一步包括第二支撑结构, 扩散板的另外
两端支撑于第二支撑结构上。
根据本发明一优选实施例, 第一光源提供的光线经导光板进入扩散板。 为解决上述技术问题, 本发明釆用的另一个技术方案是: 提供一种液晶显 示装置, 该液晶显示装置包括背光模组, 背光模组包括: 两个导光板, 该两个 导光板间隔设置, 每一导光板分别包括靠近另一导光板设置的第一侧面以及与 第一侧面相对且远离另一导光板设置的第二侧面; 两组第一光源, 分别与两个 导光板的第二侧面相邻设置, 并分别为两个导光板提供光线; 扩散板, 设置于 该两个导光板的第一侧面之间; 第二光源, 设置于扩散板的下方, 并为扩散板 提供光线。
根据本发明一优选实施例, 两个导光板的第一侧面上分别设置有第一支撑 结构, 扩散板的两端支撑于第一支撑结构上。
根据本发明一优选实施例, 背光模组进一步包括光学膜片, 光学膜片设置 于导光板和扩散板的上方。
根据本发明一优选实施例, 背光模组进一步包括背板, 背板设置于导光板 和第二光源的下方, 并支撑导光板和第二光源。
根据本发明一优选实施例, 背板包括间隔设置的两个第一支撑部以及位于 两个第一支撑部之间且向下凹陷的第二支撑部, 其中两个导光板分别支撑于两 个第一支撑部上, 第二光源支撑于第二支撑部上。
根据本发明一优选实施例, 背板进一步包括第二支撑结构, 扩散板的另外 两端支撑于第二支撑结构上。
根据本发明一优选实施例, 第一光源提供的光线经导光板进入扩散板。 本发明的有益效果是: 区别于现有技术的情况, 本发明的背光模组及液晶 显示装置能够同时釆用侧光式和直下式入光方式, 具有轻薄、 可易于实现区域 亮度控制且成本低的优点。
【附图说明】
为了更清楚地说明本发明实施例中的技术方案, 下面将对实施例描述中所 需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明 的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。 其中:
图 1是本发明背光模组的第一实施例的结构图;
图 2是本发明背光模组的第二实施例的结构图;
图 3是本发明背光模组的第三实施例的结构图。
【具体实施方式】
请参见图 1 , 图 1是本发明背光模组的第一实施例的结构图。 如图 1所示, 本实施例的背光模组 10包括: 两个导光板 11及 12、 两组第一光源 13及 14、 扩散板 15、 第二光源 16、 光学膜片 17以及背板 18。
在本实施例中, 导光板 11、 12为楔形导光板, 且沿水平方向间隔设置。 导 光板 11 包括第一侧面 111以及第二侧面 112。 其中, 第一侧面 111靠近导光板 12设置,第二侧面 112与第一侧面 111相对且远离导光板 12设置。第一侧面 111 上进一步设置有第一支撑结构 113。 导光板 12包括第一侧面 121以及第二侧面 122。 其中, 第一侧面 121靠近导光板 11设置, 第二侧面 122与第一侧面 121 相对且远离导光板 11设置。 第一侧面 121上进一步设置第一支撑结构 123。
第一光源 13与导光板 11的第二侧面 112相邻设置,为导光板 11提供光线, 第一光源 14与导光板 12的第二侧面 122相邻设置, 为导光板 12提供光线。 第 一光源 13、 14可以是单颗或多颗 LED或者冷阴极荧光灯管 (CCFL )。
扩散板 15设置于导光板 11的第一侧面 111和导光板 12的第一侧面 121之 间。 并且, 在本实施例中, 扩散板 15的两端支撑于第一支撑结构 113和第一支 撑结构 123上。 在本实施例中, 第一支撑结构 113和第一支撑结构 123为阶梯 结构, 且该阶梯结构的高度均等于扩散板 15的高度, 以使得导光板 11、 12的 顶面 (出光面)与扩散板 15的顶面 (出光面)处于同一水平面上。 在本实施例
中, 扩散板 15的高度小于第一侧面 111、 121处的导光板 11、 12的厚度, 因此 第一支撑结构 113、 123可直接形成于导光板 11、 12上。 在其他实施例中, 扩 散板 15可以通过其他方式支撑于导光板 11、 12的第一侧面 111、 121之间, 例 如粘胶、 镶嵌等方式。
第二光源 16设置于扩散板 15的下方,为扩散板 15提供光线。第二光源 16 可以是多颗 LED或者多根冷阴极荧光灯管 (CCFL )。
光学膜片 17设置于导光板 11、 12和扩散板 15的上方。 光学膜片 17可以 是扩散片、 增亮片或补偿片等本领域公知的各种光学膜片的任意组合。
背板 18设置于导光板 11、 12和第二光源 16的下方, 用于支撑导光板 11、 12和第二光源 16。具体来说,背板 18包括间隔设置的两个第一支撑部 181、 182 以及位于两个第一支撑部 181、 182之间且向下凹陷的第二支撑部 183 , 其中导 光板 11、 12分别支撑于第一支撑部 181、 182上, 第二光源 16支撑于第二支撑 部 183上。 在本实施例中, 第一支撑部 181、 182倾斜设置, 以配合导光板 11、 12的倾斜底面。 此外, 背板 18可进一步支撑第一光源 13、 14。 背板 18上可进 一步设置有第二支撑结构 (图未示), 第二支撑结构用于支撑扩散板 15 的另外 两端, 以提高扩散板 15的固定效果。
第一光源 13、 14提供的光线以侧光方式分别经导光板 11、 12的第二侧面 112、 122进入导光板 11、 12的内部, 并在导光板 11、 12的底面上的网点或其 他散射结构的散射作用以及背板 18表面的反射涂层或背板 18与导光板 11、 12 之间的反射片的反射作用下经导光板 11、 12的顶面射出。 经导光板 11、 12的 顶面射出的光线经光学膜片 17作用后提供给液晶面板(图未示)。
第二光源 16提供的光线以直下方式经扩散板 15的底面进入扩散板 15的内 部, 并在扩散板 15的扩散作用后经扩散板 15的顶面射出。 经扩散板 15的顶面 射出的光线经光学膜片 17作用后提供给液晶面板(图未示)。 第二光源 16与扩 散板 15之间的距离需要根据光学膜片 17、第二光源 16以及扩散板 15的类型等 决定, 并通过调试得到, 并且此距离经常会大于导光板 11、 12 的厚度。 因此,
在本实施例中,在背板 18上设置向下凹陷的第二支撑部 183来支撑第二光源 16 , 并根据调试结果设置第二支撑部 183的凹陷深度, 进而使得第二光源 16与扩散 板 15之间保持适当的距离。
在优选实施例中, 导光板 11、 12的第一侧面 111、 121上不设置反射片或 反射涂层, 使得第一光源 13、 14提供的部分光线可经导光板 11、 12进入扩散 板 15 , 并与第二光源 16提供的光线进行混光后经扩散板 15的顶面射出。 通过 这种方式, 可充分提高导光板 11、 12与扩散板 15的接合位置的亮度均匀性。
请参见图 2 , 图 2是本发明背光模组的第二实施例的结构图。 如图 2所示, 第二实施例的背光模组 20与第一实施例的背光模组 10的不同之处在于: 扩散 板 25的高度大致等于第一侧面 211、 221处的导光板 21、 22的厚度, 因此第一 支撑结构 213、 223设置成向下凸出于导光板 21、 22, 以确保导光板 21、 22的 顶面 (出光面) 与扩散板 25的顶面 (出光面)处于同一水平面上。
请参见图 3 , 图 3是根据本发明背光模组的第三实施例的结构图。 如图 3 所示,第三实施例的背光模组 30与第一实施例的背光模组 10的不同之处在于: 在本实施例中, 导光板 31、 32釆用平板导光板。
值得注意的是, 本领域技术人员完全可以选择其他形状的导光板来实现本 发明的目的。
通过上述方式, 本发明的背光模组釆用侧光式和直下式两种入光方式的结 题, 同时避免了全部使用直下式入光方式时由于需要较长混光距离所导致的厚 度增加问题, 具有轻薄且成本低的优点。 此外, 第一光源和第二光源可独立控 制, 具有易于实现区域亮度控制的优点。
此外, 本发明还进一步提供了一种釆用上述背光模组的液晶显示装置。 以上所述仅为本发明的实施例, 并非因此限制本发明的专利范围, 凡是利 用本发明说明书及附图内容所作的等效结构或等效流程变换, 或直接或间接运 用在其他相关的技术领域, 均同理包括在本发明的专利保护范围内。
Claims
1. 一种背光模组, 其特征在于, 所述背光模组包括:
两个导光板, 所述两个导光板间隔设置, 每一所述导光板分别包括靠近另 一所述导光板设置的第一侧面以及与所述第一侧面相对且远离另一所述导光板 设置的第二侧面;
两组第一光源, 分别与所述两个导光板的所述第二侧面相邻设置, 并分别 为所述两个导光板提供光线;
扩散板, 设置于所述两个导光板的所述第一侧面之间;
第二光源, 设置于所述扩散板的下方, 并为所述扩散板提供光线;
光学膜片, 所述光学膜片设置于所述导光板和所述扩散板的上方;
背板, 所述背板设置于所述导光板和所述第二光源的下方, 并支撑所述导 光板和所述第二光源。
2. 根据权利要求 1所述的背光模组, 其特征在于, 所述两个导光板的所述 第一侧面上分别设置有第一支撑结构, 所述扩散板的两端支撑于所述第一支撑 结构上。
3. 根据权利要求 1所述的背光模组, 其特征在于, 所述背板包括间隔设置 的两个第一支撑部以及位于所述两个第一支撑部之间且向下凹陷的第二支撑部, 其中所述两个导光板分别支撑于所述两个第一支撑部上, 所述第二光源支撑于 所述第二支撑部上。
4. 根据权利要求 1所述的背光模组, 其特征在于, 所述背板进一步包括第 二支撑结构, 所述扩散板的另外两端支撑于所述第二支撑结构上。
5. 一种背光模组, 其特征在于, 所述背光模组包括:
两个导光板, 所述两个导光板间隔设置, 每一所述导光板分别包括靠近另 一所述导光板设置的第一侧面以及与所述第一侧面相对且远离另一所述导光板 设置的第二侧面; 两组第一光源, 分别与所述两个导光板的所述第二侧面相邻设置, 并分别 为所述两个导光板提供光线;
扩散板, 设置于所述两个导光板的所述第一侧面之间;
第二光源, 设置于所述扩散板的下方, 并为所述扩散板提供光线。
6. 根据权利要求 5所述的背光模组, 其特征在于, 所述两个导光板的所述 第一侧面上分别设置有第一支撑结构, 所述扩散板的两端支撑于所述第一支撑 结构上。
7. 根据权利要求 6所述的背光模组, 其特征在于, 所述第一支撑结构为阶 梯结构, 所述阶梯结构的高度等于所述扩散板的高度。
8. 根据权利要求 6所述的背光模组, 其特征在于, 所述第一支撑结构向下 凸出于所述导光板。
9. 根据权利要求 5所述的背光模组, 其特征在于, 所述背光模组进一步包 括光学膜片, 所述光学膜片设置于所述导光板和所述扩散板的上方。
10. 根据权利要求 5所述的背光模组, 其特征在于, 所述背光模组进一步包 括背板, 所述背板设置于所述导光板和所述第二光源的下方, 并支撑所述导光 板和所述第二光源。
11. 根据权利要求 10所述的背光模组, 其特征在于, 所述背板包括间隔设 置的两个第一支撑部以及位于所述两个第一支撑部之间且向下凹陷的第二支撑 部, 其中所述两个导光板分别支撑于所述两个第一支撑部上, 所述第二光源支 撑于所述第二支撑部上。
12. 根据权利要求 10所述的背光模组, 其特征在于, 所述背板进一步包括 第二支撑结构, 所述扩散板的另外两端支撑于所述第二支撑结构上。
13. 根据权利要求 5所述的背光模组, 其特征在于, 所述第一光源提供的光 线经所述导光板进入所述扩散板。
14. 一种液晶显示装置, 其特征在于, 所述液晶显示装置包括背光模组, 所 述背光模组包括: 两个导光板, 所述两个导光板间隔设置, 每一所述导光板分别包括靠近另 一所述导光板设置的第一侧面以及与所述第一侧面相对且远离另一所述导光板 设置的第二侧面;
两组第一光源, 分别与所述两个导光板的所述第二侧面相邻设置, 并分别 为所述两个导光板提供光线;
扩散板, 设置于所述两个导光板的所述第一侧面之间;
第二光源, 设置于所述扩散板的下方, 并为所述扩散板提供光线。
15. 根据权利要求 14所述的液晶显示装置, 其特征在于, 所述两个导光板 的所述第一侧面上分别设置有第一支撑结构, 所述扩散板的两端支撑于所述第 一支撑结构上。
16. 根据权利要求 14所述的液晶显示装置, 其特征在于, 所述背光模组进 一步包括光学膜片, 所述光学膜片设置于所述导光板和所述扩散板的上方。
17. 根据权利要求 14所述的液晶显示装置, 其特征在于, 所述背光模组进 一步包括背板, 所述背板设置于所述导光板和所述第二光源的下方, 并支撑所 述导光板和所述第二光源。
18. 根据权利要求 17所述的液晶显示装置, 其特征在于, 所述背板包括间 隔设置的两个第一支撑部以及位于所述两个第一支撑部之间且向下凹陷的第二 支撑部, 其中所述两个导光板分别支撑于所述两个第一支撑部上, 所述第二光 源支撑于所述第二支撑部上。
19. 根据权利要求 17所述的液晶显示装置, 其特征在于, 所述背板进一步 包括第二支撑结构, 所述扩散板的另外两端支撑于所述第二支撑结构上。
20. 根据权利要求 14所述的液晶显示装置, 其特征在于, 所述第一光源提 供的光线经所述导光板进入所述扩散板。
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| CN2011100678478A CN102128398B (zh) | 2011-03-21 | 2011-03-21 | 背光模组及液晶显示装置 |
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| CN101051153A (zh) * | 2007-05-11 | 2007-10-10 | 友达光电股份有限公司 | 背光模块 |
| CN101324725A (zh) * | 2008-07-30 | 2008-12-17 | 京东方科技集团股份有限公司 | 液晶显示设备与背光装置 |
| CN201348177Y (zh) * | 2009-01-19 | 2009-11-18 | 冠捷投资有限公司 | 一种侧光式背光模块 |
| JP2010251021A (ja) * | 2009-04-13 | 2010-11-04 | Seiko Instruments Inc | 照明装置およびこれを用いた表示装置 |
| US20100283718A1 (en) * | 2009-05-11 | 2010-11-11 | Samsung Electronics Co., Ltd. | Light-emitting unit and backlight apparatus having the same |
| CN102200659A (zh) * | 2010-03-24 | 2011-09-28 | 三星电子株式会社 | 显示设备 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864311A (zh) * | 2015-05-06 | 2015-08-26 | 广州创维平面显示科技有限公司 | 一种液晶显示装置及其直下与侧入混合式背光模组 |
| CN112682728A (zh) * | 2020-12-31 | 2021-04-20 | 欧普照明股份有限公司 | 光学模组及灯具 |
| CN112682728B (zh) * | 2020-12-31 | 2022-08-23 | 欧普照明股份有限公司 | 光学模组及灯具 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20120262645A1 (en) | 2012-10-18 |
| CN102128398B (zh) | 2013-05-01 |
| CN102128398A (zh) | 2011-07-20 |
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