WO2013149406A1 - 背光模组及液晶显示器 - Google Patents

背光模组及液晶显示器 Download PDF

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Publication number
WO2013149406A1
WO2013149406A1 PCT/CN2012/073727 CN2012073727W WO2013149406A1 WO 2013149406 A1 WO2013149406 A1 WO 2013149406A1 CN 2012073727 W CN2012073727 W CN 2012073727W WO 2013149406 A1 WO2013149406 A1 WO 2013149406A1
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WO
WIPO (PCT)
Prior art keywords
light emitting
emitting component
light
backlight module
component
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/CN2012/073727
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English (en)
French (fr)
Inventor
方扩军
黄建发
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.)
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Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US13/511,709 priority Critical patent/US9182630B2/en
Publication of WO2013149406A1 publication Critical patent/WO2013149406A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • 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
    • G02B6/0096—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type
    • 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
    • G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
    • G02F1/133385—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell with cooling means, e.g. fans
    • 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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • G02F1/133603—Direct backlight with LEDs

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a backlight module and a liquid crystal display.
  • FIG. 1 is a schematic structural diagram of a backlight module in the prior art.
  • the backlight module includes a light source 11 , a reflective cover 12 , a reflective plate 13 , and an optical film 14 .
  • the reflector 13 is disposed below the optical film 14 and disposed parallel to the optical film 14.
  • a light guiding region Q is formed between the reflector 13 and the optical film 14.
  • the light source 11 is disposed.
  • the reflector 12 reflects the light of the light source 11 to the reflector 13 or the optical film 14.
  • the propagation distance K of the light in the light guiding area Q and the height H of the light guiding area Q are mutually restricted. Generally, when K/H ⁇ 40, the uniform brightness requirement may be satisfied.
  • An object of the present invention is to provide a backlight module to solve the technical problem that the thickness of the backlight module is continuously increased in the case where the size of the liquid crystal display is increased in the prior art.
  • Still another object of the present invention is to provide a liquid crystal display to solve the technical problem that the thickness of the backlight module is continuously increased in the case where the size of the liquid crystal display is increased in the prior art.
  • the present invention provides a backlight module including a parallel and oppositely disposed optical film and a reflective plate, and a light guiding region is formed between the optical film and the reflecting plate, wherein the backlight module further includes The light guiding area emits a first light emitting component and a plurality of second light emitting components;
  • the first light emitting component is disposed outside the light guiding area, the first light emitting component includes a light source and a first reflective cover, and the light source is disposed in the first reflective cover;
  • the second light emitting components are each disposed in the light guiding region, and the second light emitting components each include a second reflective cover, a light source located in the second reflective cover, and a second reflective cover Facing the opposite curved reflective sheet, wherein the second reflective cover of the second light emitting component has the same orientation;
  • the orientations of the first reflector of the first illumination component and the second reflector of the second illumination component are identical.
  • the curved reflective sheet of the second light emitting component is connected to the second reflective cover.
  • a gap is formed between the curved reflective sheet of the second light emitting component and the second reflective cover.
  • the backlight module further includes a heat dissipating component or a circuit component, and the heat dissipating component or the circuit component is disposed in the gap.
  • Another object of the present invention is to provide a backlight module to solve the technical problem that the thickness of the backlight module is continuously increased in the case where the size of the liquid crystal display is increased in the prior art.
  • the present invention provides a backlight module including a parallel and opposite optical film and a reflective plate.
  • a light guiding region is formed between the optical film and the reflective plate, and the backlight module further includes a first light emitting component for emitting light to the light guiding region and at least one second light emitting component;
  • the first light emitting component is disposed outside the light guiding region, the at least one second light emitting component is disposed in the light guiding region, and the first light emitting component and the at least one second light emitting component emit light Consistent in direction;
  • the at least one second light emitting component includes a curved reflective sheet facing the first light emitting component for reflecting light incident on the at least one second light emitting component to the optical film.
  • the first light emitting component and the at least one second light emitting component each include a light source and a reflective cover, and the light source is disposed in the reflective cover, the first light emitting component and the The reflective cover of the at least one second light-emitting component has a uniform orientation, and the curved reflective sheet of the at least one second light-emitting component is connected to the reflective cover of the at least one second light-emitting component and the at least one second light-emitting
  • the reflectors of the assembly are oriented in opposite directions.
  • a gap is formed between the curved reflective sheet and the reflective cover of the second light-emitting component, and the backlight module further includes a heat-dissipating component or a circuit component, and the heat-dissipating component or the circuit component is disposed. Within the gap.
  • a plurality of second light-emitting components are disposed in the light-guiding region, and the plurality of second light-emitting components are the same as the light-emitting direction of the at least one second light-emitting component.
  • All of the second illuminating components include a reflector, a light source located in the reflector, and a curved reflective sheet connected to the reflector and opposite to the direction of the reflector, wherein all of the second illuminating components The reflectors are oriented the same.
  • the backlight module further includes another first light emitting component and another second light emitting component, which are respectively symmetric with the first light emitting component and the at least one second light emitting component.
  • Still another object of the present invention is to provide a liquid crystal display to solve the technical problem that the thickness of the backlight module is continuously increased in the case where the size of the liquid crystal display is increased in the prior art.
  • the present invention constructs a liquid crystal display including a backlight module, the backlight module includes parallel and oppositely disposed optical films and reflectors, and a light guide is formed between the optical film and the reflector.
  • the backlight module further includes a first light emitting component for emitting light to the light guiding region and at least one second light emitting component;
  • the first light emitting component is disposed outside the light guiding region, the at least one second light emitting component is disposed in the light guiding region, and the first light emitting component and the at least one second light emitting component emit light Consistent in direction;
  • the at least one second light emitting component includes a curved reflective sheet facing the first light emitting component for reflecting light incident on the at least one second light emitting component to the optical film.
  • the first light emitting component and the at least one second light emitting component each include a light source and a reflective cover, the light source is disposed in the reflective cover, the first light emitting component and the The reflectors of the at least one second illuminating component are aligned, and the curved reflective sheet of the at least one second illuminating component is connected to the reflective cover of the at least one second illuminating component and the at least one second illuminating component The reflector is oriented in the opposite direction.
  • a gap is formed between the curved reflective sheet and the reflective cover of the second light emitting component, and the backlight module further includes a heat dissipating component or a circuit component, wherein the heat dissipating component or the circuit component is disposed on Within the gap.
  • a plurality of second light emitting components are further disposed in the light guiding region, and the plurality of second light emitting components are the same as the light emitting direction of the at least one second light emitting component, all
  • the second illuminating components each include a reflector, a light source located in the reflector, and a curved reflective sheet connected to the reflector and opposite to the direction of the reflector, wherein all of the second illuminating components The reflectors are oriented the same.
  • the backlight module further includes another first light emitting component and another second light emitting component, which are respectively symmetric with the first light emitting component and the at least one second light emitting component.
  • the backlight module and the liquid crystal display of the present invention are provided with a first light emitting component outside the light guiding region formed by the optical film and the reflecting plate, and at least one second light emitting component is disposed in the light guiding region, and The second light emitting component is provided with a curved reflective sheet, and the curved reflective sheet can reflect the received light to the optical film.
  • the present invention can increase the thickness of the backlight module.
  • the backlight module is guaranteed to have a better light-emitting effect.
  • FIG. 1 is a schematic structural view of a backlight module in the prior art
  • FIG. 2 is a schematic structural view of a first preferred embodiment of a backlight module of the present invention
  • FIG. 3 is a schematic structural view of a first light emitting component used in a backlight module of the present invention.
  • FIG. 4 is a schematic structural view of a second light emitting component used in a backlight module of the present invention.
  • FIG. 5 is a schematic structural view of a second preferred embodiment of a backlight module of the present invention.
  • FIG. 2 is a schematic structural view of a first preferred embodiment of a backlight module of the present invention.
  • the backlight module includes an optical film 21, a reflective plate 22, a first light-emitting component 23, and at least one second light-emitting component 24.
  • the optical film 21 and the reflective plate 22 are disposed in parallel and opposite with each other.
  • a light guiding region Q is formed.
  • the first illuminating component 23 is disposed outside the light guiding area Q, and the second illuminating component 24 is disposed in the light guiding area Q.
  • the first light emitting component 23 and the second light emitting component 24 have the same light emitting direction.
  • FIG. 3 is a schematic structural diagram of the first light-emitting component 23 in the backlight module of the present invention shown in FIG.
  • the first light emitting component 23 includes a first light source 231 and a first reflective cover 232.
  • the first light source 231 is located in the first reflective cover 232 and is substantially surrounded by the first reflective cover 232.
  • the first reflector 232 is preferably a parabolic collimator.
  • the first reflector 232 can also be other types of collimators, as long as the light of the first source 231 can be collimated and directed to the light guiding area Q, which will not be described in detail herein. .
  • FIG. 4 is a schematic structural diagram of the second light-emitting assembly 24 of the present invention shown in FIG. 2.
  • the second light emitting assembly 24 includes a second light source 241, a second reflective cover 242, and a curved reflective sheet 243.
  • the second light source 241 is located within the second reflector 242 and is substantially surrounded by the second reflector 242.
  • the curved reflection sheet 243 is connected to the second reflection cover 242.
  • the second reflector 242 is preferably a parabolic collimator.
  • the second reflector 242 can also be a collimator of other forms, as long as the light of the second light source 241 can be collimated and directed to the light guiding area Q, which is not detailed here. Said.
  • the first reflector 232 and the second reflector 242 have the same shape and the orientations of the two reflectors in the backlight module are the same. As shown in FIG. 2 , both directions are along the direction A. Therefore, the light emitting directions of the first light emitting component 23 and the second light emitting component 24 are the same.
  • the curved reflective sheet 243 and the second reflective cover 242 may be connected together in an integrally formed manner.
  • the curved reflective sheet 243 may also be an extension formed on the reflective plate 22 and then connected to the second reflective cover 242, that is, the curved reflective sheet 243. It may be integrally formed with the reflecting plate 22.
  • the form of the curved reflective sheet 243 of the present invention is not limited to the above two examples, and may be a single component, which will not be described herein.
  • the direction of the curved reflection sheet 243 is opposite to the orientation of the second reflection cover 242. As shown in FIG. 2, the curved reflection sheet 243 is oriented substantially in a direction B opposite to the direction A for reflecting the light incident on the curved reflection sheet 243 to the optical film 21.
  • the backlight module of the present invention can also be provided with a plurality of second light-emitting components 24 in the light-guiding region Q along the direction A according to optical requirements, wherein each of the second light-emitting components 24 is the same
  • the direction of illumination (or orientation) is arranged in order.
  • the orientation of the second reflective cover 242 of each of the second light-emitting components 24 is the same as the orientation of the first reflective cover 232 of the first light-emitting component 23, and the curved reflective sheets 243 of each of the second light-emitting components 24 are The orientation of the first reflector 232 of the first illumination assembly 23 is reversed. Therefore, the curved reflective sheet 243 located between the adjacent two second reflective covers 242 can be used to reflect the light between the adjacent two second reflective covers 242 and directed toward the curved reflective sheet 243 to the Optical film 21.
  • the curved reflective sheet 243 is a curved surface structure, which may be formed by bending a plurality of planes, or a smooth curved surface or the like, as long as the received light is reflected to the optical film 21. That's it, I won't go into details here.
  • the backlight module is in a single-side light-in mode, that is, the first light-emitting component 23 and the second light-emitting component 24 are substantially along the direction A. Light is incident into the light guiding region Q.
  • a gap M is formed between the curved reflective sheet 243 and the reflective cover 242 of the second light-emitting assembly 24, and the gap M can be placed on a heat-dissipating component or a circuit component or the like according to actual conditions, or other components can be placed.
  • the curved reflective sheet 243 has a reflection height h
  • the light guiding region Q of the backlight module has a light guiding thickness H.
  • the reflection height h is equal to the light guide thickness H to ensure that light does not pass through the second light-emitting component 24, thereby ensuring a better light guiding effect.
  • the working principle of the first preferred embodiment of the backlight module shown in FIG. 2 to FIG. 4 is as follows:
  • the first light-emitting assembly 23 is disposed outside the light-guiding region Q, and the open ends of the first reflective cover 232 of the first light-emitting assembly 23 are respectively connected to the reflective plate 22 and the optical film 21. Arranging at least one of the second light-emitting components 24 in the light-guiding region Q, and making the orientation of the second reflector 242 of the second light-emitting component 24 coincide with the orientation of the first reflector 232, that is, Along direction A.
  • the light emitted by the first light source 231 is reflected and collimated by the first reflector 232, enters the light guiding area Q, enters the light of the light guiding area Q, and a part directly enters A part of the optical film 21 is directed toward the reflecting plate 22.
  • a portion of the light that is incident on the reflecting plate 22 is reflected by the reflecting plate 22 to the optical film 21, and the other portion is reflected by the reflecting plate 22 toward the curved reflecting sheet 243 of the second light emitting unit 24, and then passes through the curved reflecting sheet 243. After the reflection, the optical film 21 is entered.
  • the curved reflection sheet 243 reflects all the received light to the optical film 21. It can be seen that the light emitted from the first light-emitting component 23 can be completely entered into the optical film 21 through the continuous reflection of the first reflector 232, the reflector 22 and the curved reflector 243.
  • the light emitted by the second light source 241 of the second light emitting component 24 is a second reflective cover 232, a reflective plate 22, and a second light emitting component adjacent to the second light emitting component 24 via the second light emitting component 24.
  • the curved reflection sheet 243 of 24 can also all enter the optical film 21 after continuous reflection.
  • the curved reflective sheet 243 of the second light-emitting component 24 can reflect the received light to the optical film 21, so the present invention can be based on the liquid crystal display
  • the size of the second light-emitting component 24 is set. Even if the size of the liquid crystal display is continuously increased, the light-guiding effect of the backlight module can be ensured by setting the number of the second light-emitting components 24, and the thickness of the backlight module is not required to be increased. .
  • FIG. 5 is a schematic structural view of a second preferred embodiment of a backlight module of the present invention.
  • the difference from the single-side light-in mode of the first preferred embodiment shown in FIG. 2 is that the second preferred embodiment shown in FIG. 5 is a double-side light-in mode, and the second preferred embodiment is a backlight mode.
  • the group includes two mutually facing first light-emitting components 23 symmetrically disposed on two sides of the optical film 21, and symmetrically disposed in the light-guiding region Two mutually facing second lighting assemblies 24 in Q, and further, the first reflecting cover 232 of each of the first lighting assemblies 23 is oriented in a second reflection with the second lighting assembly 24 adjacent thereto
  • the orientation of the cover 242 is uniform, and the orientation of the curved reflection sheet 243 of the second light-emitting assembly 24 adjacent thereto is opposite.
  • the structure of the second preferred embodiment shown in FIG. 5 is similar to that of the first preferred embodiment shown in FIG. 2. Therefore, for the description of the operation principle of the backlight module of FIG. 5, please refer to the description for FIG. I won't go into details here.
  • the present invention also provides a liquid crystal display comprising the backlight module provided by the present invention. Since the backlight module has been described in detail above, it will not be described herein.
  • the backlight module of the present invention and the liquid crystal display having the same can be provided with a first light-emitting component outside the light-guiding region formed by the optical film and the reflector, and at least one second light-emitting component is disposed in the light-guiding region.
  • the second illuminating component is provided with a curved reflective sheet, and the curved reflective sheet can reflect the received light to the optical film.

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

Description

背光模组及液晶显示器 技术领域
本发明涉及液晶显示技术领域，特别是涉及一种背光模组及液晶显示器。
 背景技术
随着液晶技术的不断发展，对液晶面板内各部件的要求越来越高。
请参阅图1，图1为现有技术中背光模组的结构示意图。
所述背光模组包括光源11、反射罩12、反射板13以及光学膜片14。
所述反射板13位于所述光学膜片14的下方并与所述光学膜片14平行设置，在所述反射板13和光学膜片14之间形成一导光区Q，所述光源11设置于所述反射罩12内，所述反射罩12将光源11的光线反射至所述反射板13或者所述光学膜片14。
请继续参阅图1，光线在导光区Q内的传播距离K与导光区Q的高度H相互制约，一般当K/H＜40时才可能满足亮度均匀的要求。
但是随着大尺寸液晶显示器的不断发展，光线的传播距离K也会相应的增加，为了保持亮度均匀的要求，需增加导光区Q的高度H，这无疑会增加背光模组的厚度，与液晶显示器轻薄化发展趋势相背。
综上，如何在液晶显示器尺寸增加的情况下，降低或者保持背光模组的厚度，是液晶显示技术领域需要解决的技术问题之一。
 技术问题
本发明的一个目的在于提供一种背光模组，以解决现有技术中在液晶显示器尺寸增加的情况下，背光模组的厚度不断增加的技术问题。
本发明的又一个目的在于提供一种液晶显示器，以解决现有技术中在液晶显示器尺寸增加的情况下，背光模组的厚度不断增加的技术问题。
 技术解决方案
本发明构造了一种背光模组，包括平行且相对设置的光学膜片和反射板，该光学膜片和反射板之间形成一导光区，其中，所述背光模组还包括用于向所述导光区发射光线的第一发光组件以及多个第二发光组件；
所述第一发光组件设置于所述导光区之外，所述第一发光组件包括光源和第一反射罩，所述光源设置于所述第一反射罩内；
所述第二发光组件均设置于所述导光区内，所述第二发光组件均包括有第二反射罩、位于所述第二反射罩内的光源、以及与所述第二反射罩的朝向相反的曲面反射片，其中所述第二发光组件的第二反射罩的朝向相同；
其中所述第一发光组件的第一反射罩和所述第二发光组件的的第二反射罩的朝向一致。
在本发明的背光模组中，所述第二发光组件的曲面反射片与第二反射罩相连接。
在本发明的背光模组中，所述第二发光组件的曲面反射片和第二反射罩之间形成有一空隙。
在本发明的背光模组中，所述背光模组还包括有散热部件或者电路部件中，该散热部件或者电路部件设置于所述空隙内。
本发明的另一个目的在于提供一种背光模组，以解决现有技术中在液晶显示器尺寸增加的情况下，背光模组的厚度不断增加的技术问题。
为解决上述问题，本发明构造了一种背光模组，包括平行且相对设置的光学膜片和反射板，该光学膜片和反射板之间形成一导光区，所述背光模组还包括用于向所述导光区发射光线的第一发光组件以及至少一第二发光组件；
所述第一发光组件设置于所述导光区之外，所述至少一第二发光组件设置于所述导光区内，所述第一发光组件和所述至少一第二发光组件的发光方向一致；
所述至少一第二发光组件包括有曲面反射片，所述曲面反射片朝向所述第一发光组件，用于将射向所述至少一第二发光组件的光线反射至所述光学膜片。
在本发明的背光模组中，所述第一发光组件和所述至少一第二发光组件均包括光源和反射罩，所述光源设置于所述反射罩内，所述第一发光组件和所述至少一第二发光组件的反射罩的朝向一致，所述至少一第二发光组件的曲面反射片是与所述至少一第二发光组件的反射罩相连接并与所述至少一第二发光组件的反射罩的朝向相反。
在本发明的背光模组中，所述第二发光组件的曲面反射片和反射罩之间形成有一空隙，所述背光模组还包括有散热部件或者电路部件中，该散热部件或者电路部件设置于所述空隙内。
在本发明的背光模组中，在所述导光区内还设置有多个第二发光组件，所述多个第二发光组件均与所述的至少一第二发光组件的发光方向相同，所有的第二发光组件均包括有反射罩、位于所述反射罩内的光源、以及与所述反射罩相连接并与所述反射罩的朝向相反的曲面反射片，其中所有的第二发光组件的反射罩的朝向相同。
在本发明的背光模组中，所述背光模组还包括有另一个第一发光组件及另一个第二发光组件，分别与所述第一发光组件及所述至少一第二发光组件对称。
本发明的又一个目的在于提供一种液晶显示器，以解决现有技术中在液晶显示器尺寸增加的情况下，背光模组的厚度不断增加的技术问题。
为解决上述问题，本发明构造了一种液晶显示器，包括背光模组，所述背光模组包括平行且相对设置的光学膜片和反射板，该光学膜片和反射板之间形成一导光区，所述背光模组还包括用于向所述导光区发射光线的第一发光组件以及至少一第二发光组件；
所述第一发光组件设置于所述导光区之外，所述至少一第二发光组件设置于所述导光区内，所述第一发光组件和所述至少一第二发光组件的发光方向一致；
所述至少一第二发光组件包括有曲面反射片，所述曲面反射片朝向所述第一发光组件，用于将射向所述至少一第二发光组件的光线反射至所述光学膜片。
在本发明的液晶显示器中，所述第一发光组件和所述至少一第二发光组件均包括光源和反射罩，所述光源设置于所述反射罩内，所述第一发光组件和所述至少一第二发光组件的反射罩的朝向一致，所述至少一第二发光组件的曲面反射片是与所述至少一第二发光组件的反射罩相连接并与所述至少一第二发光组件的反射罩的朝向相反。
在本发明的液晶显示器中，所述第二发光组件的曲面反射片和反射罩之间形成有一空隙，所述背光模组还包括有散热部件或者电路部件中，该散热部件或者电路部件设置于所述空隙内。
在本发明的液晶显示器中，在所述导光区内还设置有多个第二发光组件，所述多个第二发光组件均与所述的至少一第二发光组件的发光方向相同，所有的第二发光组件均包括有反射罩、位于所述反射罩内的光源、以及与所述反射罩相连接并与所述反射罩的朝向相反的曲面反射片，其中所有的第二发光组件的反射罩的朝向相同。
在本发明的液晶显示器中，所述背光模组还包括有另一个第一发光组件及另一个第二发光组件，分别与所述第一发光组件及所述至少一第二发光组件对称。
 有益效果
相较于现有技术，本发明背光模组及液晶显示器是在光学膜片和反射板构成的导光区外设置第一发光组件，在该导光区内设置至少一个第二发光组件，且第二发光组件设置有曲面反射片，该曲面反射片可以将接收到的光线反射至所述光学膜片，显然，即便是液晶显示器尺寸增加，本发明也无需增加背光模组的厚度，仍然能够保证背光模组一较佳的出光效果。
 附图说明
图1为现有技术中背光模组的结构示意图；
图2为本发明背光模组的第一较佳实施例结构示意图；
图3为本发明背光模组所采用的第一发光组件的结构示意图；
图4为本发明背光模组所采用的第二发光组件的结构示意图；以及
图5为本发明背光模组的第二较佳实施例的结构示意图。
 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。
请参阅图2，图2为本发明背光模组的第一较佳实施例结构示意图。
所述背光模组包括光学膜片21、反射板22、第一发光组件23以及至少一第二发光组件24，所述光学膜片21和反射板22平行且相对设置，并在二者之间形成一导光区Q。其中，所述第一发光组件23设置于所述导光区Q之外，所述第二发光组件24设置于所述导光区Q内。所述第一发光组件23和所述第二发光组件24的发光方向一致。
请参阅图3，图3为图2所示的本发明背光模组中第一发光组件23的结构示意图。所述第一发光组件23包括第一光源231和第一反射罩232，所述第一光源231位于第一反射罩232内，并基本上被第一反射罩232半包围。所述第一反射罩232优选为抛物面准直器。当然，所述第一反射罩232也可以为其他形式的准直器，只要能将所述第一光源231的光线准直后射向所述导光区Q即可，此处不再详述。
请参阅图4，图4为图2所示的本发明中第二发光组件24的结构示意图。所述第二发光组件24包括第二光源241、第二反射罩242和曲面反射片243。所述第二光源241位于第二反射罩242内，并基本上被第二反射罩242半包围。所述曲面反射片243连接至所述第二反射罩242。在本实施例中，所述第二反射罩242优选为抛物面准直器。同样地，所述第二反射罩242也可以为其他形式的准直器，只要能将所述第二光源241的光线准直后射向所述导光区Q即可，此处不再详述。
其中，上述第一反射罩232和上述第二反射罩242的形状相同且二者在背光模组内的朝向也一致，如图2所示，二者朝向均沿着方向A。因此，所述第一发光组件23和所述第二发光组件24的发光方向一致。
优选的，所述曲面反射片243与所述第二反射罩242可以是采用一体成型的方式连接在一起。在其它实施例中，所述曲面反射片243还可以是形成于所述反射板22上的一个延伸体，然后再与所述第二反射罩242连接起来，亦即，所述曲面反射片243可以是与所述反射板22一体成型。当然，本发明曲面反射片243的存在形式并不局限于以上两种范例，其也可是一个单独构件，此处不再赘述。
此外，所述曲面反射片243的朝向与所述第二反射罩242的朝向相反。如图2所示，曲面反射片243的朝向基本上沿着与方向A相反的方向B，用于将射向该曲面反射片243的光线反射至所述光学膜片21。
如图2所示，本发明背光模组还可以根据光学需求而沿着方向A在所述导光区Q内设置有多个第二发光组件24，其中每个第二发光组件24均按照相同的发光方向（或朝向）依次排列。详细地，每个第二发光组件24的第二反射罩242的朝向均与第一发光组件23的第一反射罩232的朝向相同，而每个第二发光组件24的曲面反射片243均与第一发光组件23的第一反射罩232的朝向相反。因此，位于相邻的两个第二反射罩242之间的曲面反射片243可以用于将相邻两个第二反射罩242之间、并射向该曲面反射片243的光线反射至所述光学膜片21。
如图4所示，所述曲面反射片243为一曲面结构，其可以是由多个平面弯折形成，或者为平滑的曲面等，只要能够将接收到的光线反射至所述光学膜片21即可，此处不再一一赘述。
在图2所示的第一较佳实施例中，所述背光模组为单侧入光模式，即所述第一发光组件23和所述第二发光组件24均基本上沿着方向A 将光线射入所述导光区Q。
请继续参阅图2，所述第二发光组件24的曲面反射片243和反射罩242之间形成有一空隙M，该空隙M可以根据实际情况放置散热部件或者电路部件等，或者放置其它的部件，这些设计均在本发明保护范围之内，此处不再详述。
请再参阅图2，在垂直所述光学膜片21的方向C，所述曲面反射片243具有一反射高度h，所述背光模组的导光区Q具有一导光厚度H，在本实施例中，所述反射高度h等于所述导光厚度H，以保证光线不会透过所述第二发光组件24，进而保证一较佳的导光效果。
图2至图4所示的背光模组的第一较佳实施例的工作原理为：
将所述第一发光组件23设置在导光区Q的外部，并使得所述第一发光组件23的第一反射罩232的开口端分别连接所述反射板22和所述光学膜片21。将至少一个的所述第二发光组件24设置在导光区Q内，并使得所述第二发光组件24的第二反射罩242的朝向与所述第一反射罩232的朝向一致，即均沿方向A。
在所述背光模组工作时，所述第一光源231出射的光线经所述第一反射罩232反射准直后，进入所述导光区Q，进入导光区Q的光线，一部分直接进入所述光学膜片21，一部分射向所述反射板22。射向所述反射板22光线一部分被反射板22反射至所述光学膜片21，另一部分被反射板22反射向所述第二发光组件24的曲面反射片243，然后再经由曲面反射片243的反射后进入光学膜片21。
当然，射向所述曲面反射片243的光线还有一部分来自于所述第一光源231，所述曲面反射片243将接收到的全部光线反射至所述光学膜片21。可以看出，从第一发光组件23射出的光线经过第一反射罩232、反射板22及曲面反射片243的不断反射均能全部进入所述光学膜片21。
同理，由第二发光组件24的第二光源241出射的光线是经由该第二发光组件24的第二反射罩232、反射板22以及与该第二发光组件24相邻的第二发光组件24的曲面反射片243的不断反射后亦均能全部进入所述光学膜片21。
显然，由于在导光区Q内设置有至少一个第二发光组件24，该第二发光组件24的曲面反射片243可以将接收到的光线反射至光学膜片21，因此本发明可以根据液晶显示器的尺寸设置第二发光组件24的数量，即便是液晶显示器的尺寸不断增加，也可以通过设置第二发光组件24的数量来保证背光模组的导光效果，而且还无需增加背光模组的厚度。
图5为本发明背光模组的第二较佳实施例的结构示意图。
与图2所示的第一较佳实施例的单侧入光模式不同之处在于：图5所示的第二较佳实施例为双侧入光模式，该第二较佳实施例背光模组包括对称设置于所述光学膜片21两侧的两个相互面对的第一发光组件23，以及对称设置于导光区 Q内的两个相互面对的第二发光组件24，更进一步地，每个第一发光组件23的第一反射罩232的朝向均与和它相邻的第二发光组件24的第二反射罩242的朝向一致，而与和它相邻的第二发光组件24的曲面反射片243的朝向则相对。
鉴于图5所示的第二较佳实施例的结构与图2所示的第一较佳实施例类似，因此关于图5的背光模组的工作原理的描述请参阅针对图2的描述，此处不再赘述。
本发明还提供一种液晶显示器，所述液晶显示器包括本发明提供的背光模组，鉴于该背光模组在上文已有详细的描述，此处不再赘述。
总之，本发明背光模组及具有该背光模组的液晶显示器可以通过在光学膜片和反射板构成的导光区外设置第一发光组件，在该导光区内设置至少一个第二发光组件，且第二发光组件设置有曲面反射片，该曲面反射片可以将接收到的光线反射至所述光学膜片，显然，即便是液晶显示器尺寸增加，本发明也无需增加背光模组的厚度，仍然能够保证背光模组一较佳的出光效果。
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。
 本发明的实施方式
工业实用性
序列表自由内容

Claims (14)

  1. 一种背光模组，包括平行且相对设置的光学膜片和反射板，该光学膜片和反射板之间形成一导光区，其中，所述背光模组还包括用于向所述导光区发射光线的第一发光组件以及多个第二发光组件；
    所述第一发光组件设置于所述导光区之外，所述第一发光组件包括光源和第一反射罩，所述光源设置于所述第一反射罩内；
    所述第二发光组件均设置于所述导光区内，所述第二发光组件均包括有第二反射罩、位于所述第二反射罩内的光源、以及与所述第二反射罩的朝向相反的曲面反射片，其中所述第二发光组件的第二反射罩的朝向相同；
    其中所述第一发光组件的第一反射罩和所述第二发光组件的的第二反射罩的朝向一致。
  2. 根据权利要求1所述的背光模组，其中，所述第二发光组件的曲面反射片与第二反射罩相连接。
  3. 根据权利要1所述的背光模组，其中，所述第二发光组件的曲面反射片和第二反射罩之间形成有一空隙。
  4. 根据权利要求1所述的背光模组，其中，所述背光模组还包括有散热部件或者电路部件中，该散热部件或者电路部件设置于所述空隙内。
  5. 一种背光模组，包括平行且相对设置的光学膜片和反射板，该光学膜片和反射板之间形成一导光区，其中，所述背光模组还包括用于向所述导光区发射光线的第一发光组件以及至少一第二发光组件；
    所述第一发光组件设置于所述导光区之外，所述至少一第二发光组件设置于所述导光区内，所述第一发光组件和所述至少一第二发光组件的发光方向一致；
    所述至少一第二发光组件包括有曲面反射片，所述曲面反射片朝向所述第一发光组件，用于将射向所述至少一第二发光组件的光线反射至所述光学膜片。
  6. 根据权利要求5所述的背光模组，其中，所述第一发光组件和所述至少一第二发光组件均包括光源和反射罩，所述光源设置于所述反射罩内，所述第一发光组件和所述至少一第二发光组件的反射罩的朝向一致，所述至少一第二发光组件的曲面反射片是与所述至少一第二发光组件的反射罩相连接并与所述至少一第二发光组件的反射罩的朝向相反。
  7. 根据权利要6所述的背光模组，其中，所述第二发光组件的曲面反射片和反射罩之间形成有一空隙，所述背光模组还包括有散热部件或者电路部件中，该散热部件或者电路部件设置于所述空隙内。
  8. 根据权利要求6所述的背光模组，其中，在所述导光区内还设置有多个第二发光组件，所述多个第二发光组件均与所述的至少一第二发光组件的发光方向相同，所有的第二发光组件均包括有反射罩、位于所述反射罩内的光源、以及与所述反射罩相连接并与所述反射罩的朝向相反的曲面反射片，其中所有的第二发光组件的反射罩的朝向相同。
  9. 根据权利要求5所述的背光模组，其中，所述背光模组还包括有另一个第一发光组件及另一个第二发光组件，分别与所述第一发光组件及所述至少一第二发光组件对称。
  10. 一种液晶显示器，其中，包括背光模组，所述背光模组包括平行且相对设置的光学膜片和反射板，该光学膜片和反射板之间形成一导光区，所述背光模组还包括用于向所述导光区发射光线的第一发光组件以及至少一第二发光组件；
    所述第一发光组件设置于所述导光区之外，所述至少一第二发光组件设置于所述导光区内，所述第一发光组件和所述至少一第二发光组件的发光方向一致；
    所述至少一第二发光组件包括有曲面反射片，所述曲面反射片朝向所述第一发光组件，用于将射向所述至少一第二发光组件的光线反射至所述光学膜片。
  11. 根据权利要求10所述的液晶显示器，其中，所述第一发光组件和所述至少一第二发光组件均包括光源和反射罩，所述光源设置于所述反射罩内，所述第一发光组件和所述至少一第二发光组件的反射罩的朝向一致，所述至少一第二发光组件的曲面反射片是与所述至少一第二发光组件的反射罩相连接并与所述至少一第二发光组件的反射罩的朝向相反。
  12. 根据权利要求11所述的液晶显示器，其中，所述第二发光组件的曲面反射片和反射罩之间形成有一空隙，所述背光模组还包括有散热部件或者电路部件中，该散热部件或者电路部件设置于所述空隙内。
  13. 根据权利要求11所述的液晶显示器，其中，在所述导光区内还设置有多个第二发光组件，所述多个第二发光组件均与所述的至少一第二发光组件的发光方向相同，所有的第二发光组件均包括有反射罩、位于所述反射罩内的光源、以及与所述反射罩相连接并与所述反射罩的朝向相反的曲面反射片，其中所有的第二发光组件的反射罩的朝向相同。
  14. 根据权利要求10所述的液晶显示器，其中，所述背光模组还包括有另一个第一发光组件及另一个第二发光组件，分别与所述第一发光组件及所述至少一第二发光组件对称。
PCT/CN2012/073727 2012-04-05 2012-04-10 背光模组及液晶显示器 Ceased WO2013149406A1 (zh)

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