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CN102759051B - Energy-saving backlight module with adjustable viewing angle based on collimation backlight - Google Patents

Energy-saving backlight module with adjustable viewing angle based on collimation backlight Download PDF

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CN102759051B
CN102759051B CN 201210249776 CN201210249776A CN102759051B CN 102759051 B CN102759051 B CN 102759051B CN 201210249776 CN201210249776 CN 201210249776 CN 201210249776 A CN201210249776 A CN 201210249776A CN 102759051 B CN102759051 B CN 102759051B
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backlight
angle
saving
collimation
module
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CN 201210249776
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Chinese (zh)
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CN102759051A (en )
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陆建钢
王祎君
谢汉萍
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上海交通大学
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Abstract

本发明公开了一种节能型背光模组,包括第一光源、第二光源和导光板构件。 The present invention discloses an energy saving type backlight module, comprising a first light source, second light source and the light guide member. 其中,第一光源发出的光经过导光板构件出射后使液晶显示器具有第一可视角度,第二光源发出的光经过导光板构件出射后使液晶显示器具有第二可视角度。 Wherein the first light source emits light through the light guide plate member after exiting the liquid crystal display having a first viewing angle, the light emitted from the second light source through the light guide plate member exiting the liquid crystal display having a second viewing angle. 第一可视角度为±(5°-10°),第二可视角度为±(60°-70°)。 A first viewing angle of ± (5 ° -10 °), a second viewing angle of ± (60 ° -70 °). 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以适用于不同的观看场合。 Energy-efficient backlight module according to the present invention by using two light sources, the liquid crystal display may be selectively with two viewing angles to suit different viewing situations. 对于一人观看液晶显示器的场合,本发明的节能型背光模组不必提供大角度的照明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。 For a person viewing the case of a liquid crystal display, the backlight module according to the present invention, energy-saving is not necessary to provide a large illumination angle and provides a positive luminance only, thereby reducing the power consumption of the liquid crystal display, to achieve the purpose of energy saving.

Description

基于准直背光的可视角度可调变的节能型背光模组 Based on Variable adjustable viewing angle of the collimated backlight energy type backlight module

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 liquid crystal display technology, particularly to a viewing angle of the collimated backlight based on the energy-saving variant adjustable backlight module.

背景技术 Background technique

[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 material is employed. 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 changes in alignment, thus affecting light passing therethrough changes, this change of light by the action of the polarizer can be expressed as variations of 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 is by controlling the electric field can control the brightness changes in light, so as to display an 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 computers, automotive displays, 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-1XD。 Most liquid crystal displays, LCD TVs and mobile phones are used part of TFT (Thin Film Transistor) driving, it is commonly referred to as TFT-1XD.

[0003] TFT-1XD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-1XD independent non-luminous display monitor, plus the need to provide a planar light source of the backlight module. 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。 The backlight module is one of the key components of the liquid crystal display panel, in general, it can be divided into a front light formula (Front light) and illuminated (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。 Wherein backlit backlight module according to their required size, the position of an edge type lamp divided into direct type and three hollow structure. 本发明主要涉及的是侧光式(Edge lighting)背光模组。 The present invention relates to an edge-lit (Edge lighting) backlight module. 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)。 The conventional backlight assembly is formed planar light source using the light guide plate, the main component in addition to a light emitting diode (LED) light source, a light guide plate, a reflective sheet, a diffusion sheet, and at least two mutually perpendicular prism sheet set ( 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 generally referred to as BEF (Brightness Enhancement Film), which functions to limit the viewing angle of the liquid crystal display, so that most of light emitted within the viewing angle of the front soil (30 ° -60 °) range, in order to achieve increased light collection 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., in the above-mentioned 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 provide sufficient forward in the display brightness to meet the viewing needs of the user; and sometimes people while watching the monitor, which when it is necessary to provide sufficient brightness in a wide angular range of view of the display to suit the user's 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。 The current prior art solution to this problem is to provide a liquid crystal display with a large viewing angle, it can be seen that such a display when the user is only one person 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] Accordingly, those skilled in the art to develop an energy-saving backlight module in order to achieve a smaller switch between viewing angle of the liquid crystal display and a larger viewing angle.

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 drawbacks of the prior art, the present invention is to solve the technical problem of providing an energy-saving type backlight module, by providing two light sources to the liquid crystal display selectively provide two 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, 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 exiting the liquid crystal display element having a first viewing angle, the light emitted from the second light source through the light guide plate member exiting the second liquid crystal display having a viewing angle.

[0008] 进一步地,所述第一可视角度为土(5° -10° )。 [0008] Further, the first visual 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 comprising a first light guide plate and a second guide plate; a first micro structure having a first light guide plate having a second microstructure and the phosphor coating on the second guide plate pattern; the first light source emits light enters the first light guide plate and the first reflective microstructures, formed a line light source, the light from the line light source enters the light guide plate and the second reflecting said second microstructure, the surface light source is formed, light from the surface light source emitted from the second light guide plate; the light emitted from the second light source enters the first light guide plate and a second guide plate from the patterning said phosphor coating excited to emit white light, the white light emitted from the second light guide plate.

[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 combined structure or integrally formed unitary structure.

[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 plurality of microstructures V-shaped grooves, said second plurality of microstructures is discretely distributed 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 is disposed at a side wall of the first light guide plate, the second light source is disposed under the first light guide plate, disposed on the first microstructured the the bottom surface of the first light guide plate, wherein the second microstructure disposed on a bottom surface of the second light 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 the bottom surface of the second light guide plate or the second light guide plate, said phosphor coating pattern emitted after being excited the white light from the top surface of the second light 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 an 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 present invention, energy-efficient backlight module according to the present invention includes a first light source, a light guide plate member, and a second modular structure formed by the first and the second light guide plate assembly . 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 sources such as an LED or laser light source is provided at the sidewall of the first light guide plate, a high emitted collimated beam to the first light guide plate. 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 an ultraviolet light source disposed under the first light guide plate, the first light guide plate emits ultraviolet light, 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。 The bottom surface of the first light guide plate having a plurality of microstructures formed of a first V-shaped groove, the bottom surface of the second light guide plate having a shape of a plurality of micro-prisms and form a second plurality of microstructures phosphor dot coating 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 the first light source and the second light source off, the light emitted from the first light source into the first light guide plate and a first reflecting microstructures, formed a line light source, light from the light source into the second line and a second guide plate the microstructures forming the surface light source, light from the surface light source emitted from the top surface of the second optical guide plate, this time saving type backlight module of the liquid crystal display of the present invention having a first viewing angle, the first viewing angle It 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 second light source is a first light source, the second ultraviolet light emitted from the first light guide plate enters the second guide plate and the phosphor coated white light to the excitation pattern from the top of the second guide plate to emit white light, an exit surface, this time saving type backlight module of the liquid crystal display of the present invention having a second viewing angle, the second viewing angle of 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, energy-efficient backlight module according to the present invention by using two light sources, the liquid crystal display may be selectively with two viewing angles, a visual angle is small, it is suitable for a person viewing the liquid crystal display the case, another visual angle is large, is suitable for people while viewing the liquid crystal display applications. 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 the use of energy-efficient backlight module according to the present invention, when a person viewing the liquid crystal display is not necessary to provide a large angle light but only provides a positive brightness, thereby reducing the power consumption of the liquid crystal display, to achieve the purpose of energy saving.

[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] The following drawings in conjunction with the inventive concept, the specific structure and technical effect produced is further described to fully understand the objects, features and advantages of the present invention.

附图说明 BRIEF DESCRIPTION

[0020]图1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] FIG. 1 is a perspective view of the energy-efficient backlight module according to the present invention, showing the overall structure of energy-efficient 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 a front view of the overall configuration of energy-efficient backlight module of the present invention, it shows a cross section of the first light guide plate type backlight module energy.

[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 (using the first light source) energy-efficient overall configuration of the backlight module according to the present invention, shows a cross section of the second light guide plate type backlight module energy.

[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 the second microstructure of the second light guide plate shown in FIG. 3 the bottom surface.

[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 (using the second light source) energy-efficient overall configuration of the backlight module according to the present invention, it shows a cross section of the second light guide plate type backlight module energy.

[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 schematic view of a second microstructure pattern and the phosphor-coated bottom surface of the second light guide 5 shown in FIG.

具体实施方式 detailed description

[0026] 如图1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] 1, in the present embodiment, energy-efficient backlight module according to the present invention comprises 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 30 comprises a first member 31 and the second light 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。 The light guide plate member 30 in the embodiment of the modular construction of the present embodiment is formed by a first light guide plate assembly 31 and the second guide plate 32. 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。 A first linear light source 10 subject, 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1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 a side wall of the first light guide plate 31 to be emitted in the z-direction in FIG. 1 a highly collimated light beam, the light beam 31 then enter the first light guide plate. 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 an ultraviolet light source disposed under the first light guide plate 31 may be the first light guide plate 31 emits ultraviolet light, near-ultraviolet and / or far ultraviolet light, its divergence angle of light emitted by a Lambertian unconventional characteristics emission. 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 a combination of a plurality of ultraviolet light source or an ultraviolet light source from the second light source of the present embodiment includes three source of ultraviolet light, 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1所示的yz平面并与图1所示的XZ平面的夹角为α (参见图2)。 [0027] The first light guide plate 31 having an inclined bottom surface, the bottom surface perpendicular to the yz plane shown in FIG. 1 and the angle between the XZ plane is shown in Figure 1 [alpha] (see FIG. 2). 第一导光板31具有倾斜的顶面,该顶面垂直于图1所示的xy平面并与图1所示的Xz平面的夹角G为45° (参见图3)。 A top surface having a first light guide plate 31 is inclined, the top surface perpendicular to the xy plane shown in FIG. 1 and the angle G Xz plane shown in FIG. 1 is 45 ° (see FIG. 3). 第二导光板32具有倾斜的底面,该底面垂直于图1所示的xy平面并与图1所示的Xz平面的夹角为Θ (参见图3)。 The second guide plate 32 having an inclined bottom surface, the bottom surface perpendicular to the xy plane shown in FIG. 1 and Xz angle with the plane of FIG. 1 is a [Theta] (see FIG. 3). 第二导光板32的顶面平行于图1所示的XZ平面(参见图3)。 The top surface of the second guide plate 32 is parallel to the XZ plane shown in Figure 1 (see FIG. 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, a first microstructures disposed on a bottom surface 31 of the first light guide plate. 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, a first plurality of microstructures 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β和倾斜角γ,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γ为90°。 These parameters include the V-shaped grooves: P intervals, the inclination angle β and the inclination angle gamma], can be implemented by different optical effects adjust these parameters, in the present embodiment, for example, gamma] set to 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, the first light source 10 is emitted into the first light guide plate 31, each of the respective portions will be respectively reflected by the first V-groove microstructures. 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ζ方向传播。 For example, light is irradiated to the LI 41 after reflection V-grooves 41 V-shaped groove, light L2 irradiated to the reflector 42 after the V-shaped groove 42 V-shaped groove, and is irradiated to the light L3 without any V-shaped grooves, will continue in the direction ζ 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 is emitted through the first microstructure linearly distributed, i.e. the formation of a line light source (first light source 10 may be regarded as a point light source). 这些被第一微结构的各个V形槽反射的光将沿I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-grooves of the first optical microstructures will propagate along the direction I, then reflected by the top surface of the first light guide plate 31, propagates in the X direction and becomes then into a second guide plate 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。 The [0029] second light guide plate 32 has a second microstructure, as shown in Figure 3, microstructures disposed on a second surface of the second guide plate 32 of the bottom. 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 plurality of microstructures microprisms discretely distributed, such as the microprisms 51 and 52. 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 the present embodiment, the micro-prisms for the production of ultra-precision machining of the base, and having the same structural parameters for 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Φ和间距SI,通过调整这些参数可以实现不同的光学效果。 4, the parameters of these microprisms comprising: a bottom width D1, base length D2, the inclination angle Φ and the SI spacing, the optical effects can be achieved by adjusting the different parameters. 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 enters the second guide plate 32, which are portions of the second microstructure of each microprism reflective. 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, the light L31 irradiated onto the micro-prism 51 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, as a first light guide plate 31 from the linear distribution of light through the second planar state microstructures distribution, i.e. the formation of a surface light source, and since the high precision microprisms second microstructure so that the the surface light source having 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 are reflected by the second microstructure microprism light propagating in the y-direction, away from the second guide plate 32 to exit out. 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。 As these emitted light remains good collimation, so in this case will behave as a liquid crystal display having a small 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 the first light source energy type backlight module 10 of the present invention, and closes the second light source, energy-efficient backlight module according to the present invention enables a liquid crystal display with 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 present invention is closed first energy-saving light source of the backlight module 10 and opening the second light source, energy-efficient backlight module according to the present invention enables a 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。 5, the first light source 10 is closed, the work of the second light source, such as ultraviolet light source 21 emits ultraviolet light of the second light source. 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 reflector 31 and the top surface of the first light guide plates 31 so as to be coupled into the second light guide plate 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。 The ultraviolet light propagates in the light guide plate main Si-based Cornell's law, when faced with the phosphor coating pattern, the excitation of 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。 Example phosphor coating pattern in the present embodiment is a plurality of discrete phosphor coating distribution point is provided on the bottom surface of the second guide plate 32, as shown in the phosphor coating 61 points 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 propagates in the ultraviolet irradiated to the phosphor coating point 61, and thus the fluorescent material coating the phosphor dot 61 is excited to emit white light, ultraviolet light is not irradiated to the phosphor coating point 62, thus coated phosphor dot 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。 Pattern is excited phosphor coated white light emitted from the light guide plate 32 facing the top of the second shot 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 exits the light guide plate 32 facing the top of the second 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 excitation pattern is coated phosphor white light emitted divergence angle is more random, so in this case 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 open when the second energy-saving light source of the present invention, the backlight module and the first light source 10 is turned off, energy-efficient backlight module according to the present invention enables a liquid crystal display having a second viewing angle, the second viewing angle for the soil (60 ° -70 °).

[0031] 以上详细描述了本发明的较佳具体实施例。 [0031] The above detailed description of particular preferred embodiments of the present invention. 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 understood by those of ordinary skill in the art without creative work can make many modifications and variations of the inventive concept. 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 those skilled in the art under this inventive concept on the basis of prior art technical solutions through logical analysis, reasoning or limited experiments can be obtained, are to be within the scope defined by the claims of.

Claims (2)

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,所述第一光源为LED或激光光源,所述第二光源为紫外光源; 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,所述第一微结构设置在所述第一导光板的底面上,所述第一微结构为多个V形槽,所述第一导光板的底面倾斜,所述V型槽的一侧面与所述第一导光板的倾斜的底面的夹角为90°,所述第二导光板上具有第二微结构和荧光粉涂覆图案,所述第二微结构设置在所述第二导光板的底面上,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;所述第一导光板具有倾斜的顶面,所述顶面与水平面的夹角为45° ; 所述 An energy-efficient backlight module, comprising a first light source, second light source and the light guide member, the first light source is an LED or a laser light source, the second light source is an ultraviolet light source; said guide a first light guide plate comprises a plate member and a second guide plate; a first microstructure having the first light guide plate, the first microstructure disposed on a bottom surface of the first light guide plate, the first microstructured a plurality of V-shaped grooves, the bottom surface of the first light guide plate is inclined, the inclination angle of the bottom surface of a side surface of said V-shaped groove of the first light guide plate is 90 °, the second guide plate having a second microstructure pattern and the phosphor coating, wherein the second microstructure disposed on a bottom surface of the second light guide plate, the phosphor coating pattern disposed on the bottom surface of the second optical guide plate or top surface of the second light guide plate, said second plurality of microstructures is discretely distributed microprisms, said phosphor coating pattern of coated phosphor plurality of discrete distribution points; the first the light guide plate having a top surface is inclined, the angle between the top surface and the horizontal is 45 °; the 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; 所述导光板构件是组合式结构或一体成型的整体结构。 The first light source is disposed at a side wall of the first light guide plate, the second light source is disposed under the first light guide plate; the light emitted from the first light source enters the first light guide plate and the first microstructure is reflected linear light sources is formed, light from the line light source enters the light guide plate and the second reflecting second microstructure, the surface light source is formed, light from the light source from the surface said second light emission; emitted from the second light source enters the light guide plate and a second guide plate from said first phosphor coating pattern excited to emit white light, the white light from the second guide the light exit plate; said guide plate member is a combined structure or integrally formed unitary structure.
2.如权利要求1所述的节能型背光模组,其中,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。 2. The energy-efficient backlight module according to claim 1, wherein said phosphor coating after the white light emitted from the excitation pattern is the top surface of the second light guide plate exit.
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CN101743510A (en) * 2007-07-17 2010-06-16 松下电器产业株式会社 Liquid crystal backlight device and liquid crystal display

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US5877829A (en) * 1995-11-14 1999-03-02 Sharp Kabushiki Kaisha Liquid crystal display apparatus having adjustable viewing angle characteristics
CN101743510A (en) * 2007-07-17 2010-06-16 松下电器产业株式会社 Liquid crystal backlight device and liquid crystal display
CN101358711A (en) * 2007-08-01 2009-02-04 奇美电子股份有限公司 Light supply apparatus and panel display

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