Búsqueda Imágenes Maps Play YouTube Noticias Gmail Drive Más »
Iniciar sesión
Usuarios de lectores de pantalla: deben hacer clic en este enlace para utilizar el modo de accesibilidad. Este modo tiene las mismas funciones esenciales pero funciona mejor con el lector.

Patentes

  1. Búsqueda avanzada de patentes
Número de publicaciónCN102759051 A
Tipo de publicaciónSolicitud
Número de solicitudCN 201210249776
Fecha de publicación31 Oct 2012
Fecha de presentación18 Jul 2012
Fecha de prioridad18 Jul 2012
También publicado comoCN102759051B
Número de publicación201210249776.8, CN 102759051 A, CN 102759051A, CN 201210249776, CN-A-102759051, CN102759051 A, CN102759051A, CN201210249776, CN201210249776.8
Inventores王祎君, 谢汉萍, 陆建钢
Solicitante上海交通大学
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos:  SIPO, Espacenet
Energy-saving backlight module with adjustable viewing angle based on collimation backlight
CN 102759051 A
Resumen
The invention discloses an energy-saving backlight module. The energy-saving backlight module comprises a first light source, a second light source and a light guide plate component, wherein the light emitted by the first light source exits through the light guide plate component, so that a liquid crystal display has a first viewing angle; the light emitted by the second light source exits through the light guide plate component, so that the liquid crystal display has a second viewing angle. The first viewing angle is plus/minus (5-10 degrees), and the second viewing angle is plus/minus (60-70 degrees). The energy-saving backlight module provided by the invention has the beneficial effect that the two light sources are used so that the liquid crystal display selectively has two viewing angles for different viewing occasions. In the case that one person watches the liquid crystal display, the energy-saving backlight module provided by the invention does not need to provide large-angle illumination and only needs to provide positive brightness, thereby reducing energy consumption of the liquid crystal display and reaching the energy-saving purpose.
Reclamaciones(10)  traducido del chino
1. 一种节能型背光模组,其特征在于,包括第一光源、第二光源和导光板构件,所述第一光源发出的光经过所述导光板构件出射后使液晶显示器具有第一可视角度,所述第二光源发出的光经过所述导光板构件出射后使所述液晶显示器具有第二可视角度。 An energy-efficient backlight module, characterized by comprising a first light source, second light source and the light guide member, after the light emitted through the first light source emitting the light guide plate member having a first liquid crystal display degree viewing angle, the light emitted from the second light source passes through the light guide member after the exit so that the liquid crystal display having a second viewing angle.
2.如权利要求I所述的节能型背光模组,其中所述第一可视角度为土(5° -10° )。 2. I said the energy-saving backlight claims, wherein the first viewing angle of the soil (5 ° -10 °).
3.如权利要求I或2所述的节能型背光模组,其中所述第二可视角度为土(60。 -70。)。 I or energy-saving backlight module as claimed in claim 2, wherein said second viewing angle of the soil (60. -70.).
4.如权利要求3所述的节能型背光模组,其中所述导光板构件包括第一导光板和第二导光板;所述第一导光板上具有第一微结构,所述第二导光板上具有第二微结构和荧光粉涂覆图案;所述第一光源发出的所述光进入所述第一导光板并被所述第一微结构反射,形成线光源,来自所述线光源的光进入所述第二导光板并被所述第二微结构反射,形成面光源,来自所述面光源的光从所述第二导光板出射;所述第二光源发出的所述光从第一导光板进入第二导光板并使所述荧光粉涂覆图案激发以发出白光,所述白光从所述第二导光板出射。 The energy-efficient backlight module according to claim 3, wherein said light guide member comprises a first light guide plate and a second guide plate; a first micro structure having the first light guide plate, said second guide light board with a second microstructure pattern and the phosphor coating; said first light source emits light into the first light guide plate by reflecting the first microstructure, forming a line light source, from the line light source The light entering the second light by reflecting the second microstructure, forming a surface light source, light from the surface light source from the second light exit; the light emitted from the second light source first light guide plate enters the second guide plate and said phosphor coating pattern excited to emit white light, the white light from the second light exit.
5.如权利要求4所述的节能型背光模组,其中所述导光板构件是组合式结构或一体成型的整体结构。 5. The energy-efficient backlight module according to claim 4, wherein said guide plate member is a composite structure or the overall structure of integrally molded.
6.如权利要求3或4所述的节能型背光模组,其中所述第一微结构为多个V形槽,所述第二微结构为多个离散分布的微棱镜,所述荧光粉涂覆图案为多个离散分布的荧光粉涂覆点。 6. The energy-efficient backlight module according to claim 3 or claim 4, wherein said first plurality of microstructures is V-shaped groove, said second plurality of microstructures for discrete distribution of microprisms, said phosphor coated with phosphor coating pattern for multiple discrete distribution point.
7.如权利要求6所述的节能型背光模组,其中所述第一光源设置在所述第一导光板的侧壁处,所述第二光源设置在所述第一导光板的下方,所述第一微结构设置在所述第一导光板的底面上,所述第二微结构设置在所述第二导光板的底面上。 7. The energy-efficient backlight module according to claim 6, wherein said first light source disposed at the side wall of the first light guide plate, said second light source is disposed below the first light guide plate, The first microstructure disposed on a bottom surface of the first light guide plate, the second micro-structure is provided on the bottom surface of the second optical guide plate.
8.如权利要求7所述的节能型背光模组,其中所述荧光粉涂覆图案设置在所述第二导光板的所述底面上或所述第二导光板的顶面上,所述荧光粉涂覆图案被激发后发出的所述白光从所述第二导光板的所述顶面出射。 8. The energy-efficient backlight module according to claim 7, wherein said phosphor coating pattern disposed on a top surface of said bottom surface of said second optical guide plate or the second optical guide plate, the The white phosphor is excited after the coating pattern emitted from said top surface of said second optical guide plate exit.
9.如权利要求8所述的节能型背光模组,其中所述第一光源为LED或激光光源。 9. The energy-efficient backlight module according to claim 8, wherein said first light source is a LED or laser light source.
10.如权利要求9所述的节能型背光模组,其中所述第二光源为紫外光源。 10. The energy-efficient backlight module according to claim 9, wherein said second light source is an ultraviolet light source.
Descripción  traducido del chino

基于准直背光的可视角度可调变的节能型背光模组 Adjustable variable collimator based energy-saving backlight backlight viewing angle

技术领域 FIELD

[0001] 本发明涉及液晶显示技术,尤其涉及一种基于准直背光的可视角度可调变的节能型背光模组。 [0001] The present invention relates to a liquid crystal display technology, especially collimated backlight adjustable viewing angle becomes involved in an energy-based backlight.

背景技术 BACKGROUND

[0002] 液晶显示器(IXD)是一种采用液晶为材料的显示器。 [0002] The liquid crystal display (IXD) is a liquid crystal display uses for the material. 在电场作用下,液晶分子会发生排列上的变化,从而影响通过其的光线变化,这种光线的变化通过偏光片的作用可以表现为明暗的变化。 In the electric field, the liquid crystal molecules are arranged on the change, thus affecting its light through, changes in this light by the action of the polarizer can be expressed as a change in light and shade. 这样,人们通过对电场的控制可以控制了光线的明暗变化,从而达到显示图像的目的。 Thus, it can be controlled by an electric field to control the shading of light, so as to display the image. 目前,液晶显示器的应用已经非常广泛,包括手机、平板电脑、车载显示器、电视等。 At present, the application of liquid crystal displays has been very extensive, including mobile phones, tablet PCs, automotive displays, and television. 其中大多数的液晶显示器、液晶电视及部分手机均采用TFT(Thin Film Transistor) 驱动,它们通称为TFT-IXD。 Most of LCD monitors, LCD TVs and some mobile phones are used TFT (Thin Film Transistor) drive, which is known as TFT-IXD.

[0003] TFT-IXD显示器为非自主发光型显示器,需要外加背光模组提供平面光源。 [0003] TFT-IXD monitor non-self-luminous type display, plus the need to provide flat light backlight. 背光模组为液晶显示器面板的关键零组件之一,一般而言,可分为前光式(Front light)与背光式(Back light)两种。 Backlight module is one of the key components of the liquid crystal display panel, in general, can be divided into pre-light type (Front light) with backlit (Back light) two kinds. 其中背光式的背光模组可依其规模的要求,根据灯管的位置不同分为侧光式、直下型和中空型三大结构。 Which backlit backlight module to follow the requirements of its size, according to the position of the lamp divided into edge-lit, direct type and hollow-three structures. 本发明主要涉及的是侧光式(Edge lighting)背光模组。 The present invention relates generally to the edge-lit (Edge lighting) backlight. 传统的侧光式背光模组采用导光板形成平面光源,其主要构件除了发光二极管(LED)光源、导光板、反射片、扩散片之外,还有至少两片互相垂直的集光棱镜片(Prism sheet)。 Conventional edge type backlight module using the light guide plate to form a planar light source, in addition to its main components a light emitting diode (LED) light source, a light guide plate, a reflective sheet, a diffusion sheet, there are at least two mutually perpendicular light collecting prism sheet ( Prism sheet). 该棱镜片通常简称BEF(Brightness Enhancement Film),其作用在于限制液晶显示器的可视角度,使得大部分的光线在正面视角为土(30° -60° )的范围内出射,以达到集光增亮的效果。 The prism sheet is usually referred to as the BEF (Brightness Enhancement Film), whose role is to limit the LCD viewing angle, making the most of the light in the positive perspective for the soil (30 ° -60 °) in the range of exit, in order to achieve the set light by the effect of light.

[0004] 然而,将液晶显示器的可视角度设定在一个确定的范围内(例如上文中提到的土(30° -60° ))是不利于现实使用的。 [0004] However, the viewing angle of the liquid crystal display is set within a certain range (e.g., referred to above soil (30 ° -60 °)) is not conducive to real use. 在液晶显示器的现实使用中,有时只有一人观看该显示器,这时候只需要在该显示器的正向提供足够的亮度就可以满足使用者的观看需要;而有时会有多人同时观看该显示器,这时候则需要在该显示器的大角度范围内提供足够亮度以满足使用者的观看需要。 In reality, the use of liquid crystal displays, sometimes only one person watching the monitor, this time only need to forward to provide sufficient brightness in the display to meet a user's viewing needs; and sometimes people while watching the monitor, which When you need to provide sufficient brightness over a wide angular range of the display to suit the user's viewing needs. 目前的现有技术对此问题的解决方法是提供具有大可视角度的液晶显示器,但可以看到,这样的显示器在使用者只有一人的情况下会造成不必要的能耗。 Currently prior art solution to this problem is to provide a liquid crystal display has a large viewing angle, but you can see, such a display is only one person in the user's situation will cause unnecessary energy consumption.

[0005] 因此,本领域的技术人员致力于开发一种节能型背光模组,以实现在液晶显示器的较小可视角度和较大可视角度之间的自由切换。 [0005] Thus, the skilled staff is committed to the development of an energy-saving backlight to achieve between a liquid crystal display and a larger viewing angle smaller viewing angle of the free switch.

发明内容 SUMMARY

[0006] 有鉴于现有技术的上述缺陷,本发明所要解决的技术问题是提供一种节能型背光模组,通过设置两种光源来选择性地使液晶显示器提供两种可视角度。 [0006] In view of the above-mentioned drawbacks of the prior art, the technical problem to be solved by the present invention is to provide an energy-saving type backlight module, by providing two light sources to selectively provide two liquid crystal display viewing angles.

[0007] 为实现上述目的,本发明提供了一种节能型背光模组,其特征在于,包括第一光源、第二光源和导光板构件,所述第一光源发出的光经过所述导光板构件出射后使液晶显示器具有第一可视角度,所述第二光源发出的光经过所述导光板构件出射后使所述液晶显示器具有第二可视角度。 [0007] To achieve the above object, the present invention provides an energy-efficient backlight module, characterized by comprising a first light source, second light source and the light guide member, light emitted from the first light source through the light guide plate After the exit of the liquid crystal display element having a first viewing angle, after the second light source emits light through the light guide plate member exit said liquid crystal display having a second viewing angle. [0008] 进一步地,所述第一可视角度为土(5° -10° )。 [0008] Further, the first viewing angle of the soil (5 ° -10 °).

[0009] 进一步地,所述第二可视角度为土(60° -70° )。 [0009] Further, the second viewing angle of the soil (60 ° -70 °).

[0010] 进一步地,导光板构件包括第一导光板和第二导光板;所述第一导光板上具有第一微结构,所述第二导光板上具有第二微结构和荧光粉涂覆图案;所述第一光源发出的所述光进入所述第一导光板并被所述第一微结构反射,形成线光源,来自所述线光源的光进入所述第二导光板并被所述第二微结构反射,形成面光源,来自所述面光源的光从所述第二导光板出射;所述第二光源发出的所述光从第一导光板进入第二导光板并使所述荧光粉涂覆图案激发以发出白光,所述白光从所述第二导光板出射。 [0010] Further, the light guide member includes a first guide plate and a second guide plate; the first micro structure having a first light guide plate, having a second microstructure and the phosphor coating on the second optical guide plate pattern; the light emitted from the first light source enters the first light guide plate by reflecting the first microstructure, forming a line light source, light from the line light source into said light guide by the second reflecting said second microstructure, forming surface light source, light from the surface light source from the second light emission; the light emitted from the second light source from the first into the second guide plate and the guide plate said phosphor coating pattern excited to emit white light, the white light from the second light exit.

[0011 ] 进一步地,所述导光板构件是组合式结构或一体成型的整体结构。 [0011] Further, the light guide plate member is a composite structure or the overall structure of integrally molded.

[0012] 进一步地,所述第一微结构为多个V形槽,所述第二微结构为多个离散分布的微棱镜,所述荧光粉涂覆图案为多个离散分布的荧光粉涂覆点。 [0012] Further, the first microstructure of a plurality of V-shaped grooves, said second plurality of microstructures for discrete distribution of the microprisms, said phosphor coating distribution pattern is a plurality of discrete phosphor-coated cover point.

[0013] 进一步地,所述第一光源设置在所述第一导光板的侧壁处,所述第二光源设置在所述第一导光板的下方,所述第一微结构设置在所述第一导光板的底面上,所述第二微结构设置在所述第二导光板的底面上。 [0013] Further, the first light source disposed at the side wall of the first light guide plate, said second light source is disposed below the first light guide plate, the first micro-structure is provided in the a bottom surface of the first light guide plate, the second micro-structure is provided on the bottom surface of the second optical guide plate.

[0014] 进一步地,所述荧光粉涂覆图案设置在所述第二导光板的所述底面上或所述第二导光板的顶面上,所述荧光粉涂覆图案被激发后发出的所述白光从所述第二导光板的所述顶面出射。 [0014] Further, the phosphor coating pattern disposed on a top surface of said bottom surface of said second optical guide plate or the second optical guide plate, the phosphor coating pattern after issuing excited The white light from the top surface of the second optical guide plate exit.

[0015] 进一步地,所述第一光源为LED或激光光源。 [0015] Further, the first light source is a LED or laser light source.

[0016] 进一步地,所述第二光源为紫外光源。 [0016] Further, the second light source is an ultraviolet light source.

[0017] 在本发明的较佳实施方式中,本发明的节能型背光模组包括第一光源、第二光源以及由第一导光板和第二导光板组装形成的组合式结构的导光板构件。 [0017] In a preferred embodiment of the invention, energy-efficient backlight module of the invention includes a first light source, second light source and the light guide plate member by the modular structure of the first light guide plate and a second light guide plate assembly is formed . 第一光源为如LED或激光光源的准直光源,设置在第一导光板的侧壁处,向第一导光板发射出高准直的光束。 The first light source is collimated light source such as an LED or laser light source, provided at the side wall of the first light guide plate, the first light guide plate emits highly collimated light beam. 第二光源为紫外光源,设置在第一导光板的下方,向第一导光板发出紫外光、近紫外光和/或远紫外光。 The second light source is a UV light source, disposed below the first light guide plate, and emit ultraviolet light to the first light guide plate, near ultraviolet and / or far ultraviolet light. 第一导光板的底面上具有形为多个V形槽的第一微结构,第二导光板的底面上具有形为多个微棱镜的第二微结构和形为多个点状的荧光粉涂覆图案。 A bottom surface of the first light guide plate having a shape of a first plurality of microstructures V-shaped groove, the bottom surface of the second optical guide plate having a shape of a second plurality of micro prisms and micro-structures shaped as a plurality of dot-shaped phosphor coat pattern. 当打开第一光源且关闭第二光源时,第一光源发出的光进入第一导光板并被第一微结构反射,形成线光源,来自该线光源的光进入第二导光板并被第二微结构反射,形成面光源,来自该面光源的光从第二导光板的顶面出射,此时本发明的节能型背光模组使液晶显示器具有第一可视角度,该第一可视角度为± (5° -10° )。 When opening the first light source and the second light source off, the light emitted from the first light source into the first light guide plate reflected by the first micro-structure, forming a line light source, light from the line light source into the second optical guide plate by the second reflection microstructure, forming a surface light source, light from the surface light source of the light guide plate from the top surface of the second exit, this time saving-type backlight module of the present invention is a liquid crystal display having a first viewing angle, the first viewing angle is ± (5 ° -10 °). 当打开第二光源且关闭第一光源时,第二光源发出的紫外光从第一导光板进入第二导光板并使荧光粉涂覆图案激发以发出白光,该白光从第二导光板的顶面出射,此时本发明的节能型背光模组使液晶显示器具有第二可视角度,该第二可视角度为土(60° -70° )。 When opening and closing the first light source of the second light source, ultraviolet light emitted from the second light source into the first light guide plate and a second guide plate phosphor coating pattern excited to emit white light, the white light from the second optical guide plate top side exit, then the energy-saving backlight liquid crystal display of the present invention has a second viewing angle, the second viewing angle of the soil (60 ° -70 °).

[0018] 由此可见,本发明的节能型背光模组通过使用两种光源,可以选择性地使液晶显示器具有两种可视角度,一种可视角度较小,适合于一个人观看液晶显示器的场合,另一种可视角度较大,适合于多人同时观看液晶显示器的场合。 [0018] Thus, the energy-saving backlight module of the present invention by using two light sources can be selectively LCD display with two viewing angles, a smaller viewing angle, suitable for a person viewing the LCD monitor occasion, another large viewing angle, suitable for people of occasions while viewing the LCD monitor. 这样,通过使用本发明的节能型背光模组,在一人观看液晶显示器时不必提供大角度的光亮而只需提供正向亮度,从而降低了液晶显示器的能耗,达到了节能的目的。 Thus, by using energy-saving backlight module of the present invention, when a person does not have to provide a large viewing angle LCD monitor but simply provide a positive light brightness, thereby reducing the energy consumption of the liquid crystal display to achieve energy-saving purposes.

[0019] 以下将结合附图对本发明的构思、具体结构及产生的技术效果作进一步说明,以充分地了解本发明的目的、特征和效果。 [0019] Hereinafter, with reference to the concept of the invention, the specific structure and technical effect produced is further illustrated, in order to fully understand the objects, features and advantages of the present invention. 附图说明 Brief Description

[0020] 图I是本发明的节能型背光模组的立体图,显示了节能型背光模组的整体结构。 [0020] Figure I is a perspective view of the energy-saving backlight module of the present invention, showing the overall structure of the energy-saving backlight module. [0021] 图2是本发明的节能型背光模组的整体结构的正视图,显示了节能型背光模组的第一导光板的剖面。 [0021] FIG. 2 is the overall structure of the energy-saving backlight module of the present invention is a front view showing a cross-section of the first energy-saving light guide plates backlight module.

[0022] 图3是本发明的节能型背光模组的整体结构的侧视图(使用第一光源),显示了节能型背光模组的第二导光板的剖面。 [0022] FIG. 3 is a side view of the overall configuration of energy-efficient backlight module of the present invention (using the first light source), shows a cross section of the second energy guide plate type backlight module.

[0023] 图4是图3所示的第二导光板底面上的第二微结构的示意图。 [0023] FIG. 4 is a schematic diagram of a second micro-structure shown in Figure 3 the bottom surface of the second guide plate.

[0024] 图5是本发明的节能型背光模组的整体结构的侧视图(使用第二光源),显示了节能型背光模组的第二导光板的剖面。 [0024] FIG. 5 is a side view of the overall configuration of energy-efficient backlight module of the present invention (using the second light source), shows a cross section of the second energy guide plate type backlight module.

[0025] 图6是图5所示的第二导光板底面上的第二微结构和荧光粉涂覆图案的示意图。 [0025] FIG. 6 is a bottom surface of the second optical guide plate and the phosphor coated with a second microstructure pattern shown in schematic Fig. 具体实施方式 DETAILED DESCRIPTION

[0026] 如图I所示,在本实施例中,本发明的节能型背光模组包括第一光源10、第二光源和导光板构件30。 [0026] Figure I shows, in the present embodiment, energy-efficient backlight module of the invention includes a first light source 10, second light source and the light guide plate member 30. 其中,导光板构件30包括第一导光板31和第二导光板32。 Wherein the light guide plate member 30 includes a first light guide plate 31 and the second guide plate 32. 在本实施例中的导光板构件30是由第一导光板31和第二导光板32组装形成的组合式结构。 Examples of the light guide plate member 30 in the present embodiment is assembled by the first light guide plate 31 and the second guide plate 32 is formed of modular structure. 在其它的实施例中该导光板构件30也可以是一体成型的整体结构,包括第一导光板31和第二导光板32两部分。 In other embodiments, the light guide plate member 30 may be integrally formed unitary structure comprising a first light guide plate 31 and the second guide plate 32 in two parts. 第一光源10为准直光源,例如LED或激光光源。 The first light source 10 into collimated light source, such as an LED or laser light source. 第一光源10设置在第一导光板31的侧壁处,可以沿图I所示的z方向发射出高准直的光束,该光束继而进入第一导光板31中。 The first light source 10 is provided in the side walls 31 of the first light guide plate, may emit a highly collimated beam in the z direction shown in FIG. I, the beam then enters the first light guide plate 31. 第二光源为紫外光源,设置在第一导光板31的下方,可以向第一导光板31发出紫外光、近紫外光和/或远紫外光,其发出的光的发散角符合常规的朗伯发射体特征。 The second light source is a UV light source, is provided below the first light guide plate 31 can emit ultraviolet light to the first light guide plate 31, near ultraviolet and / or far ultraviolet light, its divergence angle of light emitted in line with conventional Lambertian emitter characteristics. 第二光源可以是一个紫外光源或由多个紫外光源组合而成,本实施例的第二光源包括3个紫外光源,如紫外光源21。 The second light source may be an ultraviolet light source or from a combination of a plurality of ultraviolet light source, a second light source of the present embodiment includes three ultraviolet light source, such as ultraviolet light source 21.

[0027] 第一导光板31具有倾斜的底面,该底面垂直于图I所示的yz平面并与图I所示的xz平面的夹角为a (参见图2)。 [0027] The first light guide plate 31 has an inclined bottom surface, the angle between the perpendicular to the bottom surface as shown in Figure I and the yz plane shown in Figure I with the xz-plane is a (see Fig. 2). 第一导光板31具有倾斜的顶面,该顶面垂直于图I所示的xy平面并与图I所示的xz平面的夹角G为45° (参见图3)。 First light guide plate 31 has an inclined top surface, the top surface is perpendicular to the plane of FIG. I angle G xz and xy-plane shown in Fig. I is shown 45 ° (see Figure 3). 第二导光板32具有倾斜的底面,该底面垂直于图I所示的xy平面并与图I所示的xz平面的夹角为0 (参见图3)。 The second light guide plate 32 has an inclined bottom surface, the angle between the perpendicular to the bottom surface as shown in FIG xy plane I and I shown in FIG xz plane is 0 (see Fig. 3). 第二导光板32的顶面平行于图I所示的xz平面(参见图3)。 The second guide plate 32 is parallel to the top surface as shown in Figure I in the xz plane (see Figure 3).

[0028] 第一导光板31的上具有第一微结构,如图2所示,第一微结构设置在第一导光板31的底面上。 The [0028] first light guide plate 31 has a first microstructure, shown in Figure 2, the first microstructure disposed on a bottom surface of the first light guide plate 31. 在本实施例中,第一微结构为多个V形槽,如V形槽41、42。 In the present embodiment, the first microstructure of a plurality of V-shaped grooves, such as V-shaped grooves 41 and 42. 这些V形槽的参数包括:间隔P、倾斜角P和倾斜角Y,通过调整这些参数可以实现不同的光学效果,例如在本实施例中,设置Y为90°。 These parameters include the V-shaped grooves: interval P, P and the inclination angle of the inclination angle Y, these parameters can be achieved by adjusting the different optical effects, for example, in the present embodiment, the set Y is 90 °. 这样,第一光源10发出的光进入第一导光板31后,其各部分将分别被第一微结构的各V形槽反射。 Thus, light 10 emitted from the first light source into the first light guide plate 31, its various parts will be respectively reflected by the first V-shaped grooves of each micro-structures. 例如,光LI照射到V形槽41后被V形槽41反射,光L2照射到V形槽42后被V形槽42反射,而光L3没有照射到任何V形槽,将继续沿z方向传播。 For example, light is irradiated to the LI V-shaped groove 41 V-shaped groove 41 after reflection, the reflected light L2 is irradiated to the V-shaped groove 42 after the V-shaped groove 42, and the light L3 is not irradiated to any V-shaped grooves, will continue along the z direction spread. 由此可见,第一光源10发出的光经过第一微结构后呈线状分布,即形成了线光源(第一光源10可视作点光源)。 Thus, the first light source 10 issued after the first microstructure linearly distributed, which formed a line source (first light source 10 may be regarded as a point source). 这些被第一微结构的各个V形槽反射的光将沿y方向传播,继而被第一导光板31的顶面反射,成为沿X方向传播并继而进入第二导光板32。 These are reflected in the respective V-shaped groove of the first microstructure light will propagate along the y direction, and then reflected by the first top surface of the light guide plate 31, becomes the X-direction and subsequently propagate into the second light guide 32.

[0029] 第二导光板32的上具有第二微结构,如图3所示,第二微结构设置在第二导光板32的底面上。 On [0029] The second guide plate 32 has a second micro-structure, as shown in Figure 3, the second micro-structure provided on the bottom surface of the second guide plate 32. 在本实施例中,第二微结构为多个离散分布的微棱镜,如微棱镜51、52。 In the present embodiment, the second microstructure of a plurality of discrete distributed microprisms, microprism 51. 在本实施例中,微棱镜以超精密为加工基台进行制作,具有相同的结构参数并作周期性排列。 In this embodiment, the micro prism for production of ultra-precision machining abutment has the same structure parameters and periodically arranged. 如图4所示,这些微棱镜的参数包括:底宽D1、底长D2、倾斜角①和间距SI,通过调整这些参数可以实现不同的光学效果。 As shown in Figure 4, these parameters include microprisms: bottom width D1, base length D2, tilt angle and spacing ① SI, these parameters can be achieved by adjusting the different optical effects. 这样,来自第一导光板31的光进入第二导光板32后,其各部分将分别被第二微结构的各微棱镜反射。 Thus, the light from the first light guide plate 31 into the second optical guide plate 32, its various parts will be separately each microprism second microstructure reflection. 例如,光L31照射到微棱镜51后被微棱镜51反射,光L32照射到微棱镜52后被微棱镜52反射。 For example, light is irradiated to the micro-prism 51 L31 after reflection microprism 51, light L32 irradiated onto the micro prism 52 after reflection microprism 52. 由此可见,来自第一导光板31的呈线状分布的光经过第二微结构后呈面状分布,即形成了面光源,且由于第二微结构的微棱镜的加工精度高,因此该面光源具有很高的出光均匀性。 Thus, from the first light guide plate 31 is linearly distributed after the second optical microstructure was planar distribution, i.e., the formation of a surface light source, and a second micro-structure due to the high processing precision microprisms, so the the surface light source has a high light uniformity. 这些被第二微结构的微棱镜反射的光将沿y方向传播,离开第二导光板32向外出射。 These reflected microprism second microstructure light will propagate along the y direction, the light guide plate 32 to go away from the second shot. 由于这些出射的光保持了良好的准直性,因此此时的液晶显示器将表现为具有较小的可视角度。 Because of these emitted light to maintain a good collimation, so at this time of the liquid crystal display will appear as a smaller viewing angle. 即当打开本发明的节能型背光模组的第一光源10且关闭第二光源时,本发明的节能型背光模组可以使液晶显示器具有第一可视角度,该第一可视角度为土(5° -10° )。 That is when you open the first energy-efficient light source backlight module 10 of the invention and the close of the second light source, energy-saving backlight module of the present invention, the liquid crystal display having a first viewing angle, the first viewing angle of the soil (5 ° -10 °).

[0030] 当关闭本发明的节能型背光模组的第一光源10且打开第二光源时,本发明的节能型背光模组可以使液晶显示器具有第二可视角度。 [0030] When the closure of the invention of the first energy-efficient light source backlight module 10 and open the second light source, energy-saving backlight module of the present invention, the liquid crystal display having a second viewing angle. 如图5所示,第一光源10关闭,第二光源工作,例如第二光源的紫外光源21发出紫外光。 As shown in Figure 5, the first light source 10 is closed, the second light work, such as ultraviolet light source of the second light source 21 emit ultraviolet light. 该紫外光进入第一导光板31并被第一导光板31的顶面反射,从而被耦合进入第二导光板32。 The ultraviolet light entering the first light guide plate 31 and is reflected first light guide plate 31 of the top surface, so as to be coupled into the second light guide 32. 基于斯乃尔定律,该紫外光在主导光板中传播,当遇到荧光粉涂覆图案时,将激发该荧光粉涂覆图案的荧光材料,使其发出白光。 Sri Lanka-based Cornell law, the ultraviolet light guide plate in the main transmission, when faced with the phosphor coating pattern that will excite the phosphor coated fluorescent material pattern to emit white light. 本实施例中的荧光粉涂覆图案为多个离散分布的荧光粉涂覆点,设置在第二导光板32的底面上,如图5和图6中所示的荧光粉涂覆点61、62。 Examples of the phosphor coating pattern in this embodiment is a plurality of discrete phosphor coating distribution point, provided on the bottom surface of the second guide plate 32, the phosphor coating point 61 shown in Fig. 5 and 6, 62. 其中,第二导光板32中传播的紫外光照射到了荧光粉涂覆点61,因而荧光粉涂覆点61中的荧光材料被激发发出白光,紫外光未照射到荧光粉涂覆点62,因而荧光粉涂覆点62不发光。 Wherein the second guide plate 32 propagating in the phosphor coating to UV irradiation point 61, and therefore point 61 of the phosphor coating is excited fluorescent material emits white light, ultraviolet light is not irradiated to the phosphor coating point 62, thus phosphor coating point 62 does not emit light. 荧光粉涂覆图案被激发发出的白光从第二导光板32的顶面向外出射。 Excited white phosphor coating pattern is emitted from the second light guide plate 32 facing the top shoot out. 在其它实施例中,荧光粉涂覆图案也可以设置在第二导光板32的顶面上,其发出的白光离开第二导光板32的顶面向外出射。 In other embodiments, the phosphor coating pattern may be provided on the top surface of the second guide plate 32, which emits a white light leaving the top of the second guide plate 32 facing the shot out. 由于荧光粉涂覆图案被激发发出的白光的发散角度较为随机,所以此时的液晶显示器具有较大的可视角度。 Since the excited phosphor coating pattern divergence angle of emitted white light is more random, so in this case of a liquid crystal display having a large viewing angle. 即当打开本发明的节能型背光模组的第二光源且关闭第一光源10时,本发明的节能型背光模组可以使液晶显示器具有第二可视角度,该第二可视角度为土(60° -70° )。 That is, when the present invention is to open a second light source energy-saving backlight module and close the first light source 10, the energy-saving backlight module of the present invention, the liquid crystal display having a second viewing angle, the second viewing angle of the soil (60 ° -70 °).

[0031] 以上详细描述了本发明的较佳具体实施例。 A detailed description of the preferred embodiments of the present invention specifically [0031] above. 应当理解,本领域的普通技术人员无需创造性劳动就可以根据本发明的构思做出诸多修改和变化。 It should be appreciated that one of ordinary skill in the art without inventive labor many modifications and variations may be made according to the teachings of the invention. 因此,凡本技术领域的技术人员依本发明的构思在现有技术的基础上通过逻辑分析、推理或者有限的实验可以得到的技术方案,皆应在由权利要求书所确定的保护范围内。 Therefore, all skilled in the art under this inventive concept on the basis of prior art technical solutions through logical analysis, reasoning or limited experiments can get, all should be within the scope of protection defined by the claims of.

Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
CN101358711A *1 Ago 20074 Feb 2009奇美电子股份有限公司Light supply apparatus and panel display
CN101743510A *15 Jul 200816 Jun 2010松下电器产业株式会社Liquid crystal backlight device and liquid crystal display
US5877829 *14 Nov 19962 Mar 1999Sharp Kabushiki KaishaLiquid crystal display apparatus having adjustable viewing angle characteristics
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
CN103925524A *17 Abr 201416 Jul 2014上海交通大学Energy-saving backlight unit with viewing angle adjustable
CN103925524B *17 Abr 20149 Mar 2016上海交通大学可视角可调的节能型背光模组
Clasificaciones
Clasificación internacionalF21V8/00, F21Y113/00, F21S8/00, F21V9/10
Eventos legales
FechaCódigoEventoDescripción
31 Oct 2012C06Publication
26 Dic 2012C10Entry into substantive examination
15 Jul 2015C14Grant of patent or utility model