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WO2014067189A1 - 背光模块及显示装置 - Google Patents

背光模块及显示装置 Download PDF

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Publication number
WO2014067189A1
WO2014067189A1 PCT/CN2012/085004 CN2012085004W WO2014067189A1 WO 2014067189 A1 WO2014067189 A1 WO 2014067189A1 CN 2012085004 W CN2012085004 W CN 2012085004W WO 2014067189 A1 WO2014067189 A1 WO 2014067189A1
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WO
WIPO (PCT)
Prior art keywords
light
light guide
backlight module
incident surface
column
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2012/085004
Other languages
English (en)
French (fr)
Inventor
陈仕祥
陈立宜
张光耀
李德华
樊勇
宁超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US13/703,955 priority Critical patent/US20140125916A1/en
Publication of WO2014067189A1 publication Critical patent/WO2014067189A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028—Light guide, e.g. taper
    • 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
    • G02B6/0005—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 of the fibre type
    • G02B6/0008—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 of the fibre type the light being emitted at the end of the fibre
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer

Definitions

  • the present invention relates to a backlight module and a display device, and more particularly to a backlight module and a display device using external light.
  • Liquid crystal display (Liquid Crystal Display, LCD) has been widely used in a variety of electronic products, most of the liquid crystal display is a backlight type liquid crystal display, which is composed of a liquid crystal display panel and a backlight module (backlight Module).
  • the backlight module can be divided into a side-light type and a direct-light type according to the incident position of the light source (Direct-light) Type) Two to provide a backlight to the LCD panel.
  • Direct-light Direct-light
  • the light source of the backlight module is a light-emitting diode (Light-Emitting) Diode, LED) or Cold Cathode Fluorescent Lamp, CCFL), which needs to emit white light by mixing the phosphors, has a weak color performance and a narrow color gamut, and it is difficult to provide the true color of the image. Furthermore, the light source of the backlight module consumes more power, especially for large-sized liquid crystal displays.
  • the invention provides a backlight module and a display device to solve the problems of the light source of the backlight module.
  • a main object of the present invention is to provide a backlight module, where the backlight module includes:
  • At least one optical fiber connected to the concentrator
  • the light guide plate is disposed on one side of the light guide column.
  • Another object of the present invention is to provide a backlight module, the backlight module comprising:
  • At least one optical fiber connected to the concentrator
  • a light guide plate disposed on one side of the light guide column
  • the at least one optical fiber includes a plurality of optical fibers, and the light-emitting ends of the plurality of optical fibers are fixed to the light-incident surface of the light guiding rod by a fixing device, and the light guiding column includes a light-emitting surface and a mesh point,
  • the light-emitting surface is a side light-incident surface facing the light guide plate, and the mesh point is on a side surface of the light guide column and is opposite to the light-emitting surface.
  • the backlight module includes:
  • At least one optical fiber connected to the concentrator
  • the light guide plate is disposed on one side of the light guide column.
  • the at least one optical fiber includes a plurality of optical fibers, and the light emitting ends of the plurality of optical fibers are fixed to the light incident surface of the light guiding rod by a fixing device.
  • the light guiding column is disposed in a long axis or a short axis direction of the light guiding plate.
  • the light guiding column includes a light emitting surface and a mesh point, wherein the light emitting surface is a side light incident surface facing the light guide plate, and the mesh point is on a side surface of the light guiding column, and Relative to the light exit surface.
  • the backlight module further includes a reflector for covering the light guide column and exposing the light incident surface and the light exit surface of the light guide pillar.
  • the at least one optical fiber includes a plurality of optical fibers, and the light incident surface of the light guiding column is circular, and the plurality of light emitting ends of the plurality of optical fibers are arranged in a circular shape.
  • the at least one optical fiber includes a plurality of optical fibers, and the light incident surface of the light guiding column is rectangular, and the plurality of light emitting ends of the plurality of optical fibers are arranged in a rectangular shape.
  • the thickness of the light guide plate is smaller than the diameter or height of the light incident surface of the light guide column.
  • the thickness of the light guide plate is equal to the height of the light incident surface of the light guide column.
  • the backlight module and the display device of the present invention can effectively use external light to form a backlight, thereby greatly reducing the power consumption of the light source, and generally having a wider light due to external light.
  • the color gamut, the display device using the backlight module of the present invention can provide images with real colors, and greatly improve the image display quality.
  • the number of optical fibers used can be reduced, the cost of the optical fiber can be reduced, and the utilization of light energy can be improved and a narrow bezel design can be realized.
  • FIG. 1 is a schematic view of an embodiment of a display device of the present invention
  • FIG. 2 is an enlarged schematic view showing an embodiment of a backlight module of the present invention
  • FIG. 3 is a partial schematic view showing an embodiment of a backlight module of the present invention.
  • FIG. 4 is a schematic view of an embodiment of an optical fiber of the present invention.
  • Figure 5 is a schematic view of an embodiment of a light guiding column of the present invention.
  • FIG. 6 and 7 are schematic views of different embodiments of a backlight module of the present invention.
  • FIG. 8 is an enlarged schematic view showing another embodiment of a backlight module of the present invention.
  • FIG. 9 is a schematic view of another embodiment of a light guiding rod and a light guiding plate of the present invention.
  • the word “comprising” is to be understood to include the component, but does not exclude any other component.
  • “on” means located above or below the target component, and does not mean that it must be on the top based on the direction of gravity.
  • FIG. 1 is a schematic diagram of an embodiment of a backlight module according to the present invention
  • FIG. 2 is an enlarged schematic view of an embodiment of a backlight module according to the present invention
  • FIG. 3 is an implementation of a backlight module of the present invention.
  • the backlight module 100 is opposite to a display panel. (for example, a liquid crystal display panel) is provided to form a display device (for example, a liquid crystal display device).
  • the backlight module 100 includes at least one optical fiber 111, a light guide bar 120, a light guide plate 130, a light collector 140, a back plate 150, and a reflection cover 160.
  • the optical fiber 111 is connected between the concentrator 140 and the light guide column 120 for transmitting light.
  • the light guide bar 120 is connected to the optical fiber 111 and located on one side of the light guide plate 130 for guiding the light transmitted by the optical fiber 111 to enter the light guide plate 130.
  • the concentrator 140 is coupled to the optical fiber 111 for collecting external light, such as sunlight or indoor light, to provide light to the optical fiber 111.
  • the light guide bar 120 and the light guide plate 130 can be carried on the back plate 150.
  • the reflector cover 160 is used to cover the light guide column 120 to reflect the light emitted by the light guide column 120 to the light guide plate 130.
  • the plurality of optical fibers 111 may constitute a fiber bundle 110, and the optical fiber bundle 110 may include a fixer 112 for fixing the light-emitting ends of the plurality of optical fibers 111.
  • the holder 112 can be disposed in the back plate 150 and face the light incident surface 121 of the light guide bar 120 such that the light exit ends of the plurality of optical fibers 111 can be fixed to the light incident surface 121 of the light guide column 120.
  • FIG. 4 is a schematic diagram of an embodiment of an optical fiber according to the present invention.
  • Each of the optical fibers 111 may have an optical fiber core 113, a cladding 114, and a buffer layer 115.
  • a fiber core 113 can be made of, for example, quartz or PMMA for conducting light.
  • the cladding 114 is made of a hard polymer (hard Made of polymer) for covering the optical fiber core 113.
  • the buffer layer 115 may be made of, for example, tetrafluoroethylene for preventing the optical fiber 111 from being damaged.
  • FIG. 5 is a schematic diagram of an embodiment of a light guiding column according to the present invention
  • FIGS. 6 and 7 are schematic views of different embodiments of the backlight module of the present invention.
  • the light guide bar 120 of the present embodiment is disposed on one side of the light guide plate 130, for example, in the direction of the short axis (as shown in FIG. 6) or the long axis (shown in FIG. 7) of the position light guide plate 130.
  • the light guide bar 120 may have an elongated structure, and the material of the light guide bar 120 may be a photocurable resin, polymethyl methacrylate (PMMA) or polycarbonate (PC).
  • PMMA polymethyl methacrylate
  • PC polycarbonate
  • the light guide column 120 can include a light incident surface 121, a light exit surface 122, and a mesh point 123.
  • the light incident surface 121 is formed at one end of the light guiding rod 120, and faces the light emitting end of the optical fiber 111 for receiving the light transmitted by the optical fiber 111.
  • the light emitting surface 122 is a side light incident surface 133 facing the light guide plate 130 for emitting light transmitted from the optical fiber 111.
  • the dot 123 is formed on the side of the light guiding column 120 and is opposite to the light emitting surface 122 for destroying the total reflection of the light in the light guiding column 120, so that the light can be emitted from the light emitting surface 122.
  • the reflector cover 160 of the embodiment may be a U-shaped cover to cover the light guide column 120 and expose the light incident surface 121 and the light exit surface 122 of the light guide pillar 120 to ensure that light entering from the light incident surface 121 of the light guide pillar 120 may be Its light emitting surface 122 is emitted.
  • the light incident surface 121 of the light guide bar 120 may be circular.
  • the plurality of light-emitting ends of the plurality of optical fibers 111 facing the circular light-incident surface 121 may be arranged in a circular shape to transmit light to the circular light-incident surface 121.
  • the thickness of the light guide plate 130 may be smaller than the diameter or height of the light incident surface 121 of the light guide bar 120 to reduce the overall thickness of the backlight module 100.
  • FIG. 8 is an enlarged schematic view of another embodiment of a backlight module according to the present invention.
  • FIG. 9 is a schematic view of another embodiment of a light guiding column and a light guiding plate according to the present invention.
  • the light incident surface 121 of the light guiding column 120 may be rectangular.
  • the plurality of light emitting ends of the plurality of optical fibers 111 of the light incident surface 121 may be arranged in a rectangular shape to correspond to transmitting light to the rectangular shape. Smooth surface 121.
  • the thickness of the light guide plate 130 may be approximately equal to the height of the light incident surface 121 (or the light exit surface 122) of the light guide column 120. At this time, the height of the light guide bar 120 can be reduced to reduce the overall thickness of the backlight module 100.
  • the light guide plate 130 of the embodiment is disposed on one side of the light guide column 120 .
  • the light guide plate 130 can utilize injection molding (Injection Molding) is made of a photocurable resin, polymethyl methacrylate (PMMA) or polycarbonate (PC) for guiding the light transmitted by the optical fiber 111 to the liquid crystal display panel.
  • injection Molding injection molding
  • the light guide plate 130 has a light emitting surface 131, a light reflecting surface 132, and a side light incident surface 133.
  • the light-emitting surface 131 is formed on one side of the light guide plate 130 and faces the liquid crystal display panel.
  • the light-emitting surface 131 may have a matte surface treatment or a scattering point design to uniformize the light output of the light guide plate 130 and reduce the unevenness of light emission (Mura). .
  • the light-emitting surface 131 may be provided with a plurality of protruding structures (not shown) to further correct the direction of the light to increase the light collecting effect and improve the front luminance.
  • the protruding structures may be, for example, prismatic or semi-circular convex or concave structures.
  • the light reflecting surface 132 is formed on the other side of the light guiding plate 130 opposite to the light emitting surface 131 for reflecting light to the light emitting surface 131.
  • the light reflecting surface 132 of the light guide plate 130 is parallel to the light emitting surface 131.
  • the light reflecting surface 132 may be provided with a light guiding structure (not shown) for reflecting the guiding light to be emitted from the light emitting surface 131.
  • the light guiding structure of the light reflecting surface 132 is, for example, a continuous V-shaped structure, that is, a V-Cut structure, a matte structure, and a scattering point structure, so that the light transmitted by the guiding optical fiber 111 is sufficiently emitted from the light emitting surface 131.
  • the side light incident surface 133 is formed on one side or opposite sides of the light guide plate 130, and faces the light exit surface 122 of the light guide column 120 for allowing the light transmitted by the optical fiber 111 to enter the light guide plate 130 from the light guide rod 120.
  • the side light incident surface 133 may have, for example, a V-shaped structure (V-Cut), an S-shaped wave structure, or a surface roughening treatment (not shown), thereby improving the incidence efficiency and optical coupling efficiency of the light.
  • the concentrator 140 of the present embodiment may be disposed outside the display device (for example, outdoors or indoors) and connected to one end of the optical fiber 111 for collecting external light such as sunlight.
  • the concentrator 140 may include a susceptor 141, an optical lens 142, a photosensor 143, and a housing 144.
  • the optical lens 142 and the light sensor 143 can be disposed on the base 141.
  • the optical lens 142 is configured to collect external light and provide the collected light to the light incident end 116 of the optical fiber 111.
  • the light sensor 143 can be used to sense light to control the base 141 to rotate corresponding to an external light source such as the sun, thereby improving light collection efficiency.
  • the cover 144 is for covering the optical lens 142 and the photosensor 143, and the cover 144 may have an ultraviolet filter layer (not shown) to filter the ultraviolet rays in the light.
  • the back plate 150 is made of an opaque material, such as a plastic material, a metal material, or a combination of the above materials, for carrying the light guide column 120 and the light guide plate 130 , wherein
  • the back plate 150 may have a through hole 151 formed corresponding to the light incident surface 121 of the light guide bar 120 for allowing the optical fiber 111 to pass through the back plate 150.
  • the optical fiber 111 can guide external light (such as sunlight) collected by the concentrator 140 to the light guide plate 130 via the light guide bar 120 to form a surface light source. More specifically, the light collected by the concentrator 140 can be transmitted to the light guiding column 120 via the optical fiber 111 and totally reflected in the light guiding column 120. When the light is incident on the mesh point 123 of the light guiding column 120, the dot 123 will The total reflection of the light is destroyed, and the light is emitted from the light exit surface 122 to the side light incident surface 133 of the light guide plate 130. Since the backlight module 100 uses external light as a side light source, the power consumption of the light source can be greatly reduced.
  • external light such as sunlight
  • the external light (such as sunlight) generally has a wider color gamut, so the display device using the backlight module 100 can provide an image with real color, which greatly improves the image display quality of the display device.
  • the optical fiber 111 is connected to the light incident surface 121 of the light guiding rod 120 first, the number of optical fibers 111 used is reduced to reduce the cost of the optical fiber 111.
  • the light transmitted by the optical fiber 111 can be mixed by the light guiding rod 120 in advance, thereby reducing the distance of the light guiding plate 130, more effectively utilizing the light energy transmitted by the optical fiber 111, and achieving a narrow bezel design.
  • the backlight module and the display device of the present invention can collect external light to form a backlight, thereby greatly reducing the power consumption of the light source, and improving the image color performance of the display device to improve the image display quality of the display device.
  • the number of optical fibers used can be reduced, the cost of the optical fiber can be reduced, and the utilization of light energy can be improved and a narrow bezel design can be realized.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种背光模块（100）及显示装置，该显示装置包括此背光模块（100）和显示面板。此背光模块（100）包括集光器（140）、光纤（111）、导光柱（120）及导光板（130）。光纤（111）连接于集光器（140）与导光柱（120）之间，导光板（130）设置于导光柱（120）的一侧。该背光模块（100）及显示装置可利用外界光线来形成背光源。

Description

背光模块及显示装置 技术领域
本发明涉及一种背光模块及显示装置，特别是涉及一种使用外界光线的背光模块及显示装置。
 背景技术
液晶显示器(Liquid Crystal Display，LCD)已被广泛应用于各种电子产品中，液晶显示器大部分为背光型液晶显示器，其是由液晶显示面板及背光模块(backlight module)所组成。背光模块可依照光源入射位置的不同分成侧向式入光(Side-light type)与直下式入光(Direct-light type)两种，以便提供背光源至液晶显示面板。
一般，背光模块的光源为发光二极管(Light-Emitting Diode，LED)或冷阴极荧光灯管(Cold Cathode Fluorescent Lamp，CCFL)，其需通过荧光粉的混光来发出白光，因而具有较弱的色彩表现能力及较窄的色域，而难以提供影像的真实色彩。再者，背光模块的光源会耗费较多的电力，特别是用于大尺寸的液晶显示器。
故，有必要提供一种背光模块及显示装置，以解决现有技术所存在的问题。
 技术问题
本发明提供一种背光模块及显示装置，以解决背光模块的光源所存在的问题。
 技术解决方案
本发明的主要目的在于提供一种背光模块，所述背光模块包括：
集光器，用于收集外界光线；
至少一条光纤，连接于所述集光器；
导光柱，连接于所述光纤；以及
导光板，设置于所述导光柱的一侧。
本发明的另一目的在于提供一种背光模块，所述背光模块包括：
集光器，用于收集外界光线；
至少一条光纤，连接于所述集光器；
导光柱，连接于所述光纤；以及
导光板，设置于所述导光柱的一侧；
其中，所述至少一光纤包括多条光纤，所述多条光纤的出光端是通过一固定器来固定于所述导光柱的入光面处，所述导光柱包括出光面及网点，所述出光面是面对于所述导光板的侧入光面，所述网点是形成所述导光柱的侧面上，并相对于所述出光面。
本发明的又一目的在于提供一种显示装置，所述显示装置包括：
显示面板；以及
背光模块，包括：
集光器，用于收集外界光线；
至少一条光纤，连接于所述集光器；
导光柱，连接于所述光纤；以及
导光板，设置于所述导光柱的一侧。
在本发明的一实施例中，所述至少一光纤包括多条光纤，所述多条光纤的出光端是通过一固定器来固定于所述导光柱的入光面处。
在本发明的一实施例中，所述导光柱是设置于所述导光板的长轴或短轴方向上。
在本发明的一实施例中，所述导光柱包括出光面及网点，所述出光面是面对于所述导光板的侧入光面，所述网点是形成所述导光柱的侧面上，并相对于所述出光面。
在本发明的一实施例中，背光模块还包括一反射罩，用于包覆所述导光柱，并暴露出所述导光柱的入光面及出光面。
在本发明的一实施例中，所述至少一光纤包括多条光纤，所述导光柱的入光面为圆形，所述多条光纤的多个出光端呈圆形排列。
在本发明的一实施例中，所述至少一光纤包括多条光纤，所述导光柱的入光面为矩形，所述多条光纤的多个出光端呈矩形排列。
在本发明的一实施例中，所述导光板的厚度小于所述导光柱的入光面的直径或高度。
在本发明的一实施例中，所述导光板的厚度等于所述导光柱的入光面的高度。
 有益效果
相较于现有的背光模块的问题，本发明的背光模块和显示装置可有效地利用外界光线来形成背光源，因而可大幅地减少光源的电力耗费，且由于外界的光线一般可具有较宽的色域，故使用本发明背光模块的显示装置可提供具有真实色彩的影像，大幅地改善影像显示质量。又，通过本发明的导光柱，可减少光纤的使用数量，以降低光纤的成本，且可提高光能利用率及可实现窄边框设计。
 附图说明
图1为本发明显示装置的一实施例的示意图；
图2为本发明背光模块的一实施例的放大示意图；
图3为本发明背光模块的一实施例的部分示意图；
图4为本发明光纤的一实施例的示意图；
图5为本发明导光柱的一实施例的示意图；
图6及图7为本发明背光模块的不同实施例的示意图；
图8为本发明背光模块的另一实施例的放大示意图；以及
图9为本发明导光柱与导光板的另一实施例的示意图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
附图和说明被认为在本质上是示出性的，而不是限制性的。在图中，结构相似的单元是以相同标号表示。另外，为了理解和便于描述，附图中示出的每个组件的尺寸和厚度是任意示出的，但是本发明不限于此。
在附图中，为了清晰起见，夸大了层、膜、面板、区域等的厚度。在附图中，为了理解和便于描述，夸大了一些层和区域的厚度。将理解的是，当例如层、膜、区域或基底的组件被称作“在”另一组件“上”时，所述组件可以直接在所述另一组件上，或者也可以存在中间组件。
另外，在说明书中，除非明确地描述为相反的，否则词语“包括”将被理解为意指包括所述组件，但是不排除任何其它组件。此外，在说明书中，“在......上”意指位于目标组件上方或者下方，而不意指必须位于基于重力方向的顶部上。
请参照图1、图2及图3，图1为本发明背光模块的一实施例的示意图，图2为本发明背光模块的一实施例的放大示意图，图3为本发明背光模块的一实施例的部分示意图。在本实施例中，背光模块100是相对于一显示面板 (例如液晶显示面板)来设置，而形成一显示装置(例如液晶显示装置)。背光模块100包括有至少一条光纤111、导光柱120、导光板130、集光器140、背板150及反射罩160。光纤111是连接于集光器140与导光柱120之间，用于传送光线。导光柱120是连接于光纤111，且位于导光板130的一侧，用于引导光纤111所传送的光线来进入导光板130。集光器140是连接于光纤111，用于收集外界光线，例如太阳光或室内光线，以提供光线至光纤111。导光柱120及导光板130可承载于背板150上，反射罩160是用于包覆导光柱120，以反射导光柱120所发出的光线至导光板130。
如图2所示，在本实施例中，多条光纤111可组成一光纤束110，光纤束110可包括一固定器112，用于固定多条光纤111的出光端。固定器112可设置背板150内，且面对于导光柱120的入光面121，使得多条光纤111的出光端可被固定于导光柱120的入光面121处。
请参照图4，其为本发明光纤的一实施例的示意图。每一光纤111可具有光纤芯113、包层114及缓冲层115。光纤芯(core)113可由例如石英或PMMA所制成，用于传导光线。包层114是可由硬聚合物(hard polymer)所制成，用于包覆住光纤芯113。缓冲层115可由例如四氟乙烯所制成，用于避免光纤111受到损伤。
请参照图5至图7，图5为本发明导光柱的一实施例的示意图，图6及图7为本发明背光模块的不同实施例的示意图。本实施例的导光柱120是设置于导光板130的一侧，例如可位置导光板130的短轴(如图6所示)或长轴(如图7所示)方向上。导光柱120可具有长条形结构，导光柱120的材料可为光硬化型树脂、聚甲基丙烯酸甲酯(PMMA)或聚碳酸酯(PC)。导光柱120可包括入光面121、出光面122及网点123。入光面121是形成于导光柱120的一端，并面对于光纤111的出光端，用于接收光纤111所传送的光线。出光面122是面对于导光板130的侧入光面133，用于发出由光纤111所传来的光线。网点123是形成导光柱120的侧面上，并相对于出光面122，用于破坏光线在导光柱120内的全反射，使得光线可由出光面122发出。本实施例的反射罩160可为U形罩，以包覆导光柱120，并暴露出导光柱120的入光面121及出光面122，确保由导光柱120的入光面121进入的光线可由其出光面122发出。
在本实施例中，导光柱120的入光面121可为圆形。此时，如图2及图5所示，面对于圆形入光面121的多条光纤111的多个出光端可呈圆形排列，以对应传送光线至圆形入光面121。且导光板130的厚度可小于导光柱120的入光面121的直径或高度，以减少背光模块100的整体厚度。
请参照图8及图9，图8为本发明背光模块的另一实施例的放大示意图，图9为本发明导光柱与导光板的另一实施例的示意图。在另一实施例中，导光柱120的入光面121可为矩形，此时，面对于入光面121的多条光纤111的多个出光端可呈矩形排列，以对应传送光线至矩形入光面121。且导光板130的厚度可约等于导光柱120的入光面121(或出光面122)的高度。此时，可减少导光柱120的高度，以减少背光模块100的整体厚度。
如图3所示，本实施例的导光板130是设置于导光柱120的一侧。导光板130可利用射出成型(Injection Molding)的方式来制成，其材料为光硬化型树脂、聚甲基丙烯酸甲酯(PMMA)或聚碳酸酯(PC)，用以导引光纤111所传送的光线至液晶显示面板。导光板130具有出光面131、光反射面132及侧入光面133。出光面131形成于导光板130的一侧，并面对液晶显示面板，出光面131可具有雾面处理或散射点设计，以便均匀化导光板130的出光，减少出光不均(Mura)的现象。在另一实施例中，出光面131更可设有若干个突出结构(未绘示)，以便进一步修正光线的方向，来增加聚光效果，并提高正面辉度。其中此些突出结构可例如为：棱形或半圆形的凸起或凹陷结构等。光反射面132是形成导光板130相对出光面131的另一侧，用以反射光线至出光面131。在本实施例中，导光板130的光反射面132平行于出光面131。光反射面132可设有导光结构(未绘示)，以反射导引光线由出光面131射出。光反射面132的导光结构例如是呈连续性的V形结构，亦即V-Cut结构、雾面结构、散射点结构，以便导引光纤111所传送的光线充分的由出光面131射出。侧入光面133形成于导光板130的一侧或相对两侧，其面对于导光柱120的出光面122，用以允许光纤111所传送的光线可由导光柱120进入导光板130内。且此侧入光面133可具有例如V形结构(V-Cut)、S形波浪结构或表面粗糙化处理(未绘示)，以此提升光线的入射效率和光耦合效率。
如图1所示，本实施例的集光器140可设置于显示装置的外部(例如户外或室内)，并连接于光纤111的一端，用于收集外界光线，例如太阳光。集光器140可包括基座141、光学透镜142、光传感器143及外罩144。光学透镜142及光传感器143可设置于基座141上，光学透镜142用于收集外界光线，并提供所收集的光线于光纤111的入光端116。光传感器143可用于感测光线，以控制基座141对应于外界光源(如太阳)来转动，而提高光收集效率。外罩144是用于包覆光学透镜142及光传感器143，且外罩144可具有紫外线过滤层(未显示)，以过滤光线中的紫外线。
如图2所示，在本实施例中，背板150是由不透光材质所制成，例如：塑胶材料、金属材料或上述材料的组合，用于承载导光柱120及导光板130，其中背板150可具有通孔151，通孔151是对应于导光柱120的入光面121来形成，用于允许光纤111穿过背板150。
当使用本实施例背光模块来提供背光源时，光纤111可将集光器140所收集的外界光线(如太阳光)经由导光柱120来引导至导光板130，以形成面光源。更具体地，集光器140所收集的光线可经由光纤111来传送至导光柱120内，并在导光柱120内进行全反射，当光线被射至导光柱120的网点123时，网点123会破坏光线的全反射，使光线由出光面122发出至导光板130的侧入光面133。由于背光模块100是使用外部的光线来作为侧光源，因而可大幅地减少光源的电力耗费。且外界的光线(如太阳光)一般可具有较宽的色域，故使用背光模块100的显示装置可提供具有真实色彩的影像，大幅地改善显示装置的影像显示质量。再者，由于光纤111是先连接导光柱120的入光面121，因而减少光纤111的使用数量，以降低光纤111的成本。且光纤111所传送的光线可预先通过导光柱120来进行混光，因而可减少导光板130的距离，以更有效地利用光纤111所传送的光能，且可实现窄边框设计。
由上述可知，本发明的背光模块和显示装置可收集外界光线来形成背光源，因而可大幅地减少光源的电力耗费，且可改善显示装置的影像色彩表现，以改善显示装置的影像显示质量。又，通过本发明的导光柱，可减少光纤的使用数量，以降低光纤的成本，且可提高光能利用率及可实现窄边框设计。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。
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Claims (17)

  1. 一种背光模块，包括：
    集光器，用于收集外界光线；
    至少一条光纤，连接于所述集光器；
    导光柱，连接于所述光纤；以及
    导光板，设置于所述导光柱的一侧；
    其中，所述至少一光纤包括多条光纤，所述多条光纤的出光端是通过一固定器来固定于所述导光柱的入光面处，所述导光柱包括出光面及网点，所述出光面是面对于所述导光板的侧入光面，所述网点是形成所述导光柱的侧面上，并相对于所述出光面。
  2. 根据权利要求1所述的背光模块，其中所述导光柱是设置于所述导光板的长轴或短轴方向上。
  3. 根据权利要求1所述的背光模块，还包括一反射罩，用于包覆所述导光柱，并暴露出所述导光柱的入光面及出光面。
  4. 根据权利要求1所述的背光模块，其中所述导光柱的入光面为圆形，所述多条光纤的多个出光端呈圆形排列。
  5. 根据权利要求1所述的背光模块，其中所述导光柱的入光面为矩形，所述多条光纤的多个出光端呈矩形排列。
  6. 根据权利要求1所述的背光模块，其中所述导光板的厚度小于所述导光柱的入光面的直径或高度。
  7. 根据权利要求1所述的背光模块，其中所述导光板的厚度等于所述导光柱的入光面的高度。
  8. 一种背光模块，包括：
    集光器，用于收集外界光线；
    至少一条光纤，连接于所述集光器；
    导光柱，连接于所述光纤；以及
    导光板，设置于所述导光柱的一侧。
  9. 根据权利要求8所述的背光模块，其中所述至少一光纤包括多条光纤，所述多条光纤的出光端是通过一固定器来固定于所述导光柱的入光面处。
  10. 根据权利要求8所述的背光模块，其中所述导光柱是设置于所述导光板的长轴或短轴方向上。
  11. 根据权利要求8所述的背光模块，其中所述导光柱包括出光面及网点，所述出光面是面对于所述导光板的侧入光面，所述网点是形成所述导光柱的侧面上，并相对于所述出光面。
  12. 根据权利要求8所述的背光模块，还包括一反射罩，用于包覆所述导光柱，并暴露出所述导光柱的入光面及出光面。
  13. 根据权利要求8所述的背光模块，其中所述至少一光纤包括多条光纤，所述导光柱的入光面为圆形，所述多条光纤的多个出光端呈圆形排列。
  14. 根据权利要求8所述的背光模块，其中所述至少一光纤包括多条光纤，所述导光柱的入光面为矩形，所述多条光纤的多个出光端呈矩形排列。
  15. 根据权利要求8所述的背光模块，其中所述导光板的厚度小于所述导光柱的入光面的直径或高度。
  16. 根据权利要求8所述的背光模块，其中所述导光板的厚度等于所述导光柱的入光面的高度。
  17. 一种显示装置，包括：
    显示面板；以及
    背光模块，包括：
    集光器，用于收集外界光线；
    至少一条光纤，连接于所述集光器；
    导光柱，连接于所述光纤；以及
    导光板，设置于所述导光柱的一侧。
PCT/CN2012/085004 2012-11-02 2012-11-22 背光模块及显示装置 Ceased WO2014067189A1 (zh)

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