WO2016086473A1 - 背光模组以及液晶显示器 - Google Patents

背光模组以及液晶显示器 Download PDF

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Publication number
WO2016086473A1
WO2016086473A1 PCT/CN2014/094825 CN2014094825W WO2016086473A1 WO 2016086473 A1 WO2016086473 A1 WO 2016086473A1 CN 2014094825 W CN2014094825 W CN 2014094825W WO 2016086473 A1 WO2016086473 A1 WO 2016086473A1
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WO
WIPO (PCT)
Prior art keywords
light
backlight module
light source
guide plate
light guide
Prior art date
Application number
PCT/CN2014/094825
Other languages
English (en)
French (fr)
Inventor
周革革
Original Assignee
深圳市华星光电技术有限公司
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.)
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Publication date
Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US14/417,996 priority Critical patent/US9910204B2/en
Publication of WO2016086473A1 publication Critical patent/WO2016086473A1/zh

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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
    • G02B6/0031—Reflecting element, sheet or layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

Definitions

  • the present invention relates to the field of liquid crystal display, and in particular to a backlight module.
  • the invention further relates to a liquid crystal display comprising such a backlight module.
  • Liquid crystal displays have been widely used in various electronic products as display parts of electronic devices.
  • the liquid crystal itself does not emit light but it is capable of modulating light from the backlight module to display a figure or a character. Therefore, the structure of the backlight module directly affects the display effect of the crystal display.
  • the backlight module can be divided into a lower type and a side type (or side light type).
  • the side-mounted backlight module makes the liquid crystal display lighter and thinner, and the side-mounted backlight module is also the most widely used.
  • the side-mounted backlight module generally includes a light guide plate, a reflection sheet under the light guide plate, and a light source on a side of the light guide plate. The light emitted by the light source enters the light guide plate from the side of the light guide plate, and is guided by the light guide plate to illuminate the entire panel.
  • the present invention proposes a backlight module.
  • the brightness of the light source region is very uniform, thereby fundamentally reducing or even eliminating highlight points on the liquid crystal display.
  • the present invention also proposes a liquid crystal display including such a backlight module.
  • a backlight module includes a light guide plate and a light source disposed on a light incident side of the light guide plate, and the light source includes a plurality of linearly spaced light emitting points, which are opposite to the light reflecting side of the light source away from the light guide plate. An interval between adjacent light-emitting points is provided with a light reflecting member that reflects the scattered light that is irradiated into the space into the light guide plate.
  • the reflector since the reflector reflects the light irradiated into the space into the light guide plate, the brightness difference between the light-emitting point and the interval is reduced or even eliminated, and the brightness uniformity of the light source region is greatly improved.
  • the light in the light guide plate is also more uniform, thereby reducing or even eliminating the highlights on the liquid crystal display.
  • the retroreflective member is a concave member and the scattered light illuminates the concave member through the focus of the concave member.
  • the reflector of the concave structure By using the reflector of the concave structure and passing the scattered light through the focus of such a reflector, it is possible to cause the scattered light in various directions to become parallel light to be irradiated into the light guide plate.
  • the incident light from the interval is exactly the same as the incident light from the light-emitting point, and the light guide plate can thereby conduct the two incident lights in exactly the same, thereby further improving the uniformity of the brightness of the liquid crystal display.
  • the light source module further includes a reflective sheet disposed under the light guide plate and extending toward the reflector and in contact with the reflector.
  • the reflective sheet can reflect the light emitted from the lower side of the light guide plate into the light guide plate to further improve the brightness of the liquid crystal display.
  • the contact area of the reflective sheet and the retroreflective member is in the reflective side. In this way, the reflected light generated by the contact area can also be reflected again by the reflector to enter the light guide plate, thereby contributing to the improvement of the brightness of the liquid crystal display.
  • the reflective sheet is integral with the retroreflective member. In this way, accidental displacement of the reflector can be prevented.
  • the backlight module further includes a plastic frame disposed on the reflective side, and the reflective member is between the plastic frame and the light source.
  • the reflector is disposed over the area of the gap between the adjacent adjacent illumination points of the bezel.
  • the plastic frame plays a supporting and limiting role for the reflector, and the reflector can be prevented from being accidentally displaced.
  • the retroreflective member can be mounted on the plastic frame using the mounting device of the prior art, thereby greatly facilitating the installation of the retroreflective member.
  • a concave structure is provided on the region of the gap between the adjacent adjacent light-emitting points of the frame, and the reflector is made by applying a light-reflecting layer on the concave structure.
  • the reflector and the plastic frame are formed as a whole, which completely avoids the problem of accidental displacement of the reflector, and improves the liquid crystal display. It shows the reliability of performance; it also eliminates the installation process of reflectors and greatly improves production efficiency.
  • the backlight module further includes a light source circuit board electrically connected to the light source.
  • a liquid crystal display comprising a backlight module according to the above.
  • front means the direction toward the panel of the liquid crystal display.
  • post refers to the direction opposite to the "front”, that is, the direction toward the back sheet of the liquid crystal display.
  • the advantages of the present invention are as follows: (1) In the backlight module of the present invention, since the light reflecting member reflects the light irradiated into the space into the light guide plate, the light emitting point is reduced or even eliminated. The difference in brightness between the spaces greatly improves the uniformity of the brightness of the light source region, and the light in the light guide plate is more uniform, thereby attenuating or even eliminating the highlights on the liquid crystal display. (2)
  • the reflecting member is a concave member which causes the scattered light in each direction to become parallel light to be irradiated into the light guiding plate, which contributes to further improving the uniformity of the brightness of the liquid crystal display.
  • FIG. 1 shows a schematic structural view of a first embodiment of a backlight module in accordance with the present invention.
  • FIG. 2 is a schematic view of a liquid crystal display according to the present invention.
  • Fig. 3 shows a part of the view in the A-A direction of Fig. 1.
  • FIG. 4 is a schematic view showing the structure of a second embodiment of a backlight module according to the present invention.
  • FIG. 1 schematically shows a backlight module 10 in accordance with a first embodiment of the present invention.
  • the backlight module 10 includes a light guide plate 101 and a light source 102 disposed on a light incident side of the light guide plate 101 .
  • An optical film 115 for displaying a screen is provided above the light guide plate 101.
  • the light source 102 is on the side of the light guide plate 101, and thus the backlight module 10 is side-mounted.
  • 2 shows a liquid crystal display 20 including a backlight module 10 (or a backlight module 40 of the second embodiment hereinafter) according to the present invention, in which the mounting area 201 and the visible area 202 of the backlight module are schematically shown. .
  • the backlight module 10 further includes a light source circuit board 105 electrically connected to the light source 102 to supply power to the light source 102;
  • a plastic frame 103 is also included, and the plastic frame 103 is disposed on a side of the light source 102 remote from the light guide plate 101 (ie, the reflective side 104 described below).
  • the bezel 103 and the light guide plate 101 are respectively on both sides of the light source 102.
  • the plastic frame 103 is used to assemble the light guide plate 101, the light source 102, the light source circuit board 105, and the like.
  • the specific structure and installation manner of the light guide plate 101, the optical film 115, and the light source circuit board 105 are well known to those skilled in the art, and are not described herein again.
  • the structure of the backlight module 10 will be described in detail below.
  • Fig. 3 shows a part of the view in the A-A direction of Fig. 1.
  • the light source 102 includes a plurality of light-emitting points 106, and the light-emitting points 106 are arranged in a linear interval. That is, these light-emitting points 106 are arranged along a straight line, and there is a space 107 between adjacent light-emitting points.
  • the light-emitting point 106 can be a light-emitting LED (ie, a light-emitting diode).
  • a reflector 108 is disposed adjacent the gap 107 between adjacent illumination points in the reflective side 104, i.e., the reflector 108 is between the source 102 and the bezel 103 (as shown in FIG. 1).
  • the reflector 108 reflects the scattered light 109 that is incident into the space 107 into the light guide plate 101, that is, the reflector 108 is similar to the light source in the region of the interval 107, thus reducing or even eliminating the light-emitting point 106 and the gap 107 in the light source 102.
  • the difference in brightness between the light guide plates 101 is also more uniform, so that highlights on the liquid crystal display 20 can be avoided.
  • the reflector 108 is fixedly disposed on the bezel 103 and faces the space 107.
  • the plastic frame 103 supports and limits the reflector 108, preventing the reflector 108 from being accidentally displaced.
  • the reflector 108 can be a concave member.
  • the reflector 108 is disposed with a concave surface toward the light-emitting point 106, and the scattered light 109 is incident on the concave member through the focus of the reflector 108.
  • the light reflecting member 108 can collect the scattered light 109 in various directions and comb the light into the parallel light 110 to illuminate the light incident side of the light guide plate 101.
  • the parallel light 110 is parallel to the light 111 directly incident on the light incident side of the light guide plate 101, so that the light guide plate 101 can thereby conduct the two kinds of incident light in the same manner, thereby further improving the uniformity of the brightness of the liquid crystal display 20. Sex.
  • the light source module 10 further includes a reflective sheet 112 disposed under the light guide plate 101 .
  • the reflection sheet 112 is used to reflect the light emitted from the lower side of the light guide plate 101 to the inside of the light guide plate 101 to increase the brightness of the liquid crystal display 20.
  • the reflection sheet 112 extends toward and is in contact with the reflector 108.
  • the contact area 113 of the reflective sheet 112 and the reflector 108 is in the reflective side 104.
  • the reflected light generated by the contact region 113 is reflected again by the reflector 108 to enter the light guide plate 101, thereby contributing to the improvement of the brightness of the liquid crystal display 20.
  • the reflection sheet 112 is integrally formed with the light reflecting member 108. Since the reflection sheet 112 is stably mounted under the light guide plate 101 and is not displaced, the reflector 108 is not displaced, that is, the accidental displacement of the reflector 108 is completely avoided, and the produced liquid crystal display 20 is The display effect will also have good stability.
  • FIG. 4 shows a backlight module 40 in accordance with another embodiment of the present invention.
  • the structure of the backlight module 40 is substantially the same as that of the backlight module 10 shown in FIG. 1, and only the differences will be described below.
  • a concave structure 401 is provided on the area of the plastic frame 103 facing the space 107.
  • the reflector 108 described above is prepared by applying a light reflecting layer on the concave structure 401.
  • the reflector 108 is integrated with the bezel 103, completely avoiding the problem of accidental displacement of the reflector 108. Since there are no more components between the light source 102 and the plastic frame 103, the frame of the liquid crystal display 20 can be made very narrow, and can even be made without a frame. In addition, since the individual reflectors 108 are not actually present, the installation process of the reflectors is omitted in the production of the liquid crystal display 20, and the production efficiency of the liquid crystal display 20 is greatly improved.

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

Abstract

提供了一种背光模组（10）以及液晶显示器。背光模组（10）包括导光板（101）和设置在导光板（101）的入光侧的光源（102），光源（102）包括多个直线式间隔设置的发光点（106），在光源（102）的远离导光板（101）的反光侧（104）内正对相邻发光点（106）之间的间隔（107）设置有反光件（108），反光件（108）将照射到间隔（107）内的散射光（109）反射到导光板（101）内。因此，光源（102）区域的亮度非常均匀，从而从根本上减弱甚至消除了液晶显示器上的高亮点。

Description

背光模组以及液晶显示器
相关申请的交叉引用
本申请要求享有于2014年12月3日提交的名称为“背光模组以及液晶显示器”的中国专利申请CN201410725060.X的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本发明涉及液晶显示领域，特别涉及一种背光模组。本发明还涉及包括这种背光模组的液晶显示器。
背景技术
液晶显示器作为电子设备的显示部件已经广泛的应用于各种电子产品中。在液晶显示器中，液晶本身并不发光而是其能够对来自背光模组的光进行调制，从而显示出图形或字符。因此，背光模组的结构会直接影响晶显示器的显示效果。
在现有技术中，根据光源与导光板之间的位置关系，可将背光模组分为下置式和侧置式(或侧光式)。侧置式的背光模组使得液晶显示器更加轻薄，从而侧置式的背光模组的使用也最为广泛。侧置式的背光模组通常包括：导光板、处于导光板下方的反射片和处于导光板侧部的光源。光源发出的光从导光板的侧部进入导光板，并经导光板引导后照亮整个面板。
目前，窄边框的液晶显示器越来越流行。随着液晶显示器的边框越来越窄，在液晶显示器的设置光源的区域极易出现高亮点，这极大地影响了液晶显示器的品质。
发明内容
针对上述问题，本发明提出了一种背光模组。根据本发明的背光模组，光源区域的亮度非常均匀，从而从根本上减弱甚至消除了液晶显示了上的高亮点。本发明还提出了包括这种背光模组的液晶显示器。
根据本发明的第一方面，背光模组包括导光板和设置在导光板的入光侧的光源，光源包括多个直线式间隔设置的发光点，在光源的远离导光板的反光侧内正对相邻发光点之间的间隔设置有反光件，该反光件将照射到该间隔内的散射光反射到导光板内。
根据本发明的背光模组，由于反光件会将照射到间隔内的光反射到导光板内，因此会降低甚至消除发光点与间隔之间的亮度差，大幅提高光源区域的亮度的均匀性，导光板内的光线也更加均匀，从而减弱甚至消除了液晶显示器上的高亮点。
在一个实施例中，反光件为凹面件，散射光经过凹面件的焦点照射到凹面件上。使用凹面结构的反光件并且使散射光经过这种反光件的焦点，能够使沿各个方向的散射光变成平行光照射到导光板内。对于导光板而言，来自间隔的入射光与来自发光点的入射光的方向完全相同，导光板因此能完全相同地传导这两种入射光，从而进一步提高了液晶显示器的亮度的均匀性。
在一个实施例中，该光源模组还包括设置在导光板下方的朝向反光件延伸并与反光件接触的反射片。反射片能够将从导光板下方出射的光再次反射到导光板内，以进一步提高液晶显示器的亮度。
在一个优选的实施例中，反射片与反光件的接触区处于反光侧内。这样，由接触区产生的反射光也能够经反光件再次反射而进入到导光板内，从而有助于提高液晶显示器的亮度。
在另一个实施例中，反射片与反光件为一个整体。这样，可以防止反光件发生意外移位。
在一个实施例中，背光模组还包括设置在反光侧内的胶框，反光件处于胶框和光源之间。
在一个优选的实施例中，反光件设置在胶框的正对相邻发光点之间的间隔的区域上。根据这种结构，胶框对反光件起到支撑和限位作用，可防止反光件意外发生移位。此外，可使用现有技术中的贴装设备将反光件安装在胶框上，从而大大方便了反光件的安装。
在一个实施例中，在胶框的正对相邻发光点之间的间隔的区域上设置有凹面结构，反光件通过在凹面结构上涂覆反光层而制成。根据这种结构，反光件与胶框形成为一个整体，这完全避免了反光件的意外移位问题，提高了液晶显示器的 显示性能的可靠性；而且也省去了反光件的安装过程，大大提高了生产效率。
在一个实施例中，背光模组还包括与光源电连接的光源电路板。
根据本发明的第二方面，提出了一种液晶显示器，其包括根据上文所述的背光模组。
在本申请中，方位用语“前”是指朝向液晶显示器的面板的方向。方位用语“后”是指与“前”相反的方向，即朝向液晶显示器的背板的方向。
与现有技术相比，本发明的优点在于：(1)在本发明的背光模组中，由于反光件会将照射到间隔内的光反射到导光板内，因此就降低甚至消除了发光点与间隔之间的亮度差，大幅提高了光源区域的亮度的均匀性，导光板内的光线也更加均匀，从而减弱甚至消除了液晶显示了上的高亮点。(2)反光件为凹面件，其使得各个方向的散射光变成平行光照射到导光板内，这有助于进一步提高液晶显示器的亮度的均匀性。
附图说明
在下文中将基于实施例并参考附图来对本发明进行更详细的描述。其中：
图1显示了根据本发明的背光模组的第一实施例的结构示意图。
图2是根据本发明的液晶显示器的示意图。
图3显示了图1的A-A方向的视图的局部。
图4显示了根据本发明的背光模组的第二实施例的结构示意图。
在附图中，相同的部件使用相同的附图标记。附图并未按照实际的比例。
具体实施方式
下面将结合附图对本发明作进一步说明。
图1示意性地显示了根据本发明第一实施例的背光模组10。如图1所示，背光模组10包括导光板101和设置在导光板101的入光侧的光源102。在导光板101的上方设置有用于显示画面的光学膜片115。光源102处于导光板101的侧部，因此背光模组10为侧置式。图2显示了包括根据本发明的背光模组10(或下文第二实施例的背光模组40)的液晶显示器20，在其中示意性地显示了背光模组的安装区201和可视区202。
背光模组10还包括与光源102电连接的光源电路板105，以给光源102供电； 还包括胶框103，胶框103设置在光源102的远离导光板101的一侧(即下文所述的反光侧104)。从图1中可看到，胶框103和导光板101分别处于光源102的两侧。胶框103用于将导光板101、光源102和光源电路板105等装配在一起。导光板101、光学膜片115以及光源电路板105的具体结构和安装方式均是本领域的技术人员所熟知的，这里不再赘述。
下面将对背光模组10的结构进行详细描述。
图3显示了图1的A-A方向的视图的局部。如图3所示，光源102包括多个发光点106，并且这些发光点106为直线式间隔设置。也就是说，这些发光点106沿一条直线设置，并且在相邻的发光点之间存在有间隔107。优选地，发光点106可以为发光LED(即发光二极管)。
在间隔107处没有光射出，即在光源102内，发光点106和间隔107形成明暗对比强烈的区域，这有可能导致导光板101内的光不均匀并最终导致液晶显示器20上会出现高亮点。为此，在反光侧104内正对相邻发光点之间的间隔107设置了反光件108，即反光件108处于光源102和胶框103之间(如图1所示)。反光件108会将照射到间隔107内的散射光109反射到导光板101内，即反光件108类似于处于间隔107区域的光源，这样就降低甚至消除了光源102内发光点106与间隔107之间的亮度差，导光板101内的光线也更加均匀，从而能避免液晶显示器20上出现高亮点。
优选地，反光件108固定设置在胶框103上并且正对间隔107。这样，胶框103就对反光件108起到支撑和限位作用，可防止反光件108意外发生移位。
还如图1所示，反光件108可为凹面件。优选地，将反光件108设置为凹面朝向发光点106，并且散射光109经过反光件108的焦点照射到凹面件上。这样，反光件108能够把沿各个方向的散射光109收集起来，并且梳理成平行光110以照射到导光板101的入光侧。平行光110与发光点106直接照射到导光板101的入光侧的光111相平行，因此导光板101因此能完全相同地传导这两种入射光，从而进一步提高了液晶显示器20的亮度的均匀性。
返回到图1，光源模组10还包括设置在导光板101下方的反射片112。反射片112用于将从导光板101下方出射的光再次反射到导光板101的内部，以提高液晶显示器20的亮度。
在本发明的光源模组10中，反射片112朝向反光件108延伸并且与其接触。 优选地，反射片112与反光件108的接触区113处于反光侧104内。这样，由接触区113产生的反射光会经反光件108再次反射而进入到导光板101内，从而有助于提高液晶显示器20的亮度。
还可以将反射片112与反光件108一体成型。由于反射片112被稳定地安装在导光板101的下方并且不会移位，因此反光件108也不会发生移位，即彻底避免了反光件108发生意外移位，所生产的液晶显示器20在显示效果方面也就会具有良好的稳定性。
图4显示了根据本发明另一实施例的背光模组40。背光模组40的结构与图1所示的背光模组10的结构大体相同，下面仅描述不同之处。
如图4所示，在胶框103的正对间隔107的区域上设置有凹面结构401。通过在凹面结构401上涂覆反光层而制备成上文所述的反光件108。在这种结构中，反光件108与胶框103成为一个整体，彻底避免了反光件108的意外移位问题。由于在光源102和胶框103之间也不再有任何部件，从而可以将液晶显示器20的边框制作的非常窄，甚至可以制造成无边框。另外，由于实际上不存在单独的反光件108，在生产液晶显示器20时，也就省去了反光件的安装过程，大大提高了液晶显示器20的生产效率。
虽然已经参考优选实施例对本发明进行了描述，但在不脱离本发明的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本发明并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (13)

  1. 一种背光模组，包括导光板和设置在所述导光板的入光侧的光源，
    其中，所述光源包括多个直线式间隔设置的发光点，在所述光源的远离所述导光板的反光侧内正对相邻发光点之间的间隔设置有反光件，所述反光件将照射到所述间隔内的散射光反射到所述导光板内。
  2. 根据权利要求1所述的背光模组，其中，所述反光件为凹面件，所述散射光经过所述凹面件的焦点照射到所述凹面件上。
  3. 根据权利要求2所述的背光模组，其中，还包括设置在所述导光板下方的朝向所述反光件延伸并与所述反光件接触的反射片。
  4. 根据权利要求3所述的背光模组，其中，所述反射片与反光件的接触区处于所述反光侧内。
  5. 根据权利要求3所述的背光模组，其中，所述反射片与所述反光件为一个整体。
  6. 根据权利要求2所述的背光模组，其中，还包括设置在所述反光侧内的胶框，所述反光件处于所述胶框和所述光源之间。
  7. 根据权利要求6所述的背光模组，其中，所述反光件设置在所述胶框的正对相邻发光点之间的间隔的区域上。
  8. 根据权利要求6所述的背光模组，其中，在所述胶框的正对相邻发光点之间的间隔的区域上设置有凹面结构，所述反光件通过在所述凹面结构上涂覆反光层而制成。
  9. 根据权利要求1所述的背光模组，其中，还包括与所述光源电连接的光源电路板。
  10. 根据权利要求1所述的背光模组，其中，还包括与所述光源电连接的光源电路板。
  11. 根据权利要求2所述的背光模组，其中，还包括与所述光源电连接的光源电路板。
  12. 根据权利要求8所述的背光模组，其中，还包括与所述光源电连接的光源电路板。
  13. 一种液晶显示器，其包括背光模组，所述背光模组包括导光板和设置在 所述导光板的入光侧的光源，其中，所述光源包括多个直线式间隔设置的发光点，在所述光源的远离所述导光板的反光侧内正对相邻发光点之间的间隔设置有反光件，所述反光件将照射到所述间隔内的散射光反射到所述导光板内。
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