WO2017206290A1 - 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
WO2017206290A1
WO2017206290A1 PCT/CN2016/090603 CN2016090603W WO2017206290A1 WO 2017206290 A1 WO2017206290 A1 WO 2017206290A1 CN 2016090603 W CN2016090603 W CN 2016090603W WO 2017206290 A1 WO2017206290 A1 WO 2017206290A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
light source
light guide
backlight module
Prior art date
Application number
PCT/CN2016/090603
Other languages
English (en)
French (fr)
Inventor
查国伟
Original Assignee
武汉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.)
Filing date
Publication date
Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US15/117,443 priority Critical patent/US10241255B2/en
Publication of WO2017206290A1 publication Critical patent/WO2017206290A1/zh

Links

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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
    • G02B6/0048—Tapered light guide, e.g. wedge-shaped light guide with stepwise 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • 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
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a backlight module and a liquid crystal display.
  • LCD liquid crystal In the display
  • the panel of the LCD itself does not emit light, it needs to be displayed by means of an external light source.
  • a light source has two kinds of backlights and a reflective light source. Since the backlight light source does not need to be subjected to environmental changes, the current The light sources in LCD displays are almost all backlit light sources.
  • LED Light Emitting Diode
  • the existing side-entry backlight is difficult to achieve the above functions under the premise of meeting low power consumption, and the direct type Although the backlight can perform the above functions, it has the disadvantages of large power consumption, large weight, and high cost.
  • the technical problem to be solved by the present invention is to provide a backlight module and a liquid crystal display, which can realize split screen display of the display device and reduce power consumption of the display device.
  • a technical solution adopted by the present invention is to provide a backlight module, which includes: a light guide plate and a first light source and a second light source; wherein the light guide plate includes oppositely disposed light emitting surfaces and bottom surfaces, And a side surface that is connected to the light emitting surface and the bottom surface; the light emitting surface and the bottom surface together define a thickness of the light guide plate, the light guide plate includes at least a relatively thick first portion and a relatively thin second portion; the first portion of the light guide plate is a wedge plate The second portion of the light guide plate is a flat plate having the same thickness.
  • One end of the second portion of the light guide plate is connected to the thin end of the first portion of the light guide plate, and the second light source is disposed adjacent to the bottom surface of the second portion of the light guide plate.
  • the first light source is adjacent to the light guide plate.
  • the other end of the second portion is disposed; wherein the lighting modes of the first light source and the second light source at least comprise: the first light source and the second light source are simultaneously lit, the first light source is turned off, and the second light source is turned on.
  • the bottom surface of the first portion of the light guide plate is a step, a mesh point, a collision point or a V-cut structure.
  • the total thickness of the second portion of the second light source and the light guide plate is not greater than the thickness of the first portion of the light guide plate, and the first light source and the second light source are point light sources, surface light sources or line light sources.
  • a backlight module including: a light guide plate and a first light source and a second light source; wherein the light guide plate includes opposite light emitting surfaces And a bottom surface, and a side surface which is connected to the light emitting surface and the bottom surface; the light emitting surface and the bottom surface jointly define a thickness of the light guide plate, the light guide plate includes at least a relatively thick first portion and a relatively thin second portion; the first light source is oppositely guided The light source is disposed on the side of the light plate, and the second light source is disposed opposite to the bottom surface or the light exit surface at the second portion of the light guide plate.
  • the lighting mode of the first light source and the second light source at least includes: the first light source and the second light source are simultaneously lit, the first light source is turned off, and the second light source is turned on.
  • the first portion of the light guide plate is a wedge plate
  • the second portion of the light guide plate is a flat plate having the same thickness.
  • One end of the second portion of the light guide plate is connected to the thin end of the first portion of the light guide plate, and the second light source is adjacent to the second portion of the light guide plate.
  • the bottom surface is disposed, and the first light source is disposed adjacent to the other end of the second portion of the light guide plate.
  • the bottom surface of the first portion of the light guide plate is a step, a mesh point, a collision point or a V-cut structure.
  • the total thickness of the second portion of the second light source and the light guide plate is not greater than the thickness of the first portion of the light guide plate, and the first light source and the second light source are point light sources, surface light sources or line light sources.
  • a liquid crystal display which includes: a display panel and a backlight module which are arranged in a stack, and the backlight module includes: a light guide plate and a first light source
  • the light guide plate includes a light-emitting surface and a bottom surface disposed opposite to each other, and a side surface that is adjacent to the light-emitting surface and the bottom surface.
  • the light-emitting surface of the light guide plate is disposed adjacent to the display panel; the light-emitting surface and the bottom surface jointly define the thickness of the light guide plate.
  • the light panel includes at least a relatively thick first portion and a relatively thin second portion; the first light source is disposed opposite to the light guide plate side, and the second light source is disposed opposite to the bottom surface or the light exit surface at the second portion of the light guide plate.
  • the lighting mode of the first light source and the second light source at least includes: the first light source and the second light source are simultaneously lit, the first light source is turned off, and the second light source is turned on, and when the second light source is lit, the display panel is only Displayed in the area corresponding to the second part of the light guide plate.
  • the first portion of the light guide plate is a wedge plate
  • the second portion of the light guide plate is a flat plate having the same thickness.
  • One end of the second portion of the light guide plate is connected to the thin end of the first portion of the light guide plate, and the second light source is adjacent to the second portion of the light guide plate.
  • the bottom surface is disposed, and the first light source is disposed adjacent to the other end of the second portion of the light guide plate.
  • the bottom surface of the first portion of the light guide plate is a step, a mesh point, a collision point or a V-cut structure.
  • the total thickness of the second portion of the second light source and the light guide plate is not greater than the thickness of the first portion of the light guide plate, and the first light source and the second light source are point light sources, surface light sources or line light sources.
  • the backlight module of the present invention comprises: a light guide plate and a first light source and a second light source; wherein the light guide plate comprises oppositely disposed light emitting surfaces and bottom surfaces, and light emitting a side surface that meets both the surface and the bottom surface; the light-emitting surface and the bottom surface together define a thickness of the light guide plate, the light guide plate includes at least a relatively thick first portion and a relatively thin second portion; the first light source is disposed opposite to the side of the light guide plate, The two light sources are disposed opposite to the bottom surface or the light exit surface at the second portion of the light guide plate.
  • the present embodiment combines the direct type and the side-entry backlight to enable the display device to realize the split screen display of the display device, and at the same time, the power consumption of the display device can be reduced because it is not necessary to use all the direct-type backlights with high energy consumption. .
  • FIG. 1 is a side view showing the structure of a first embodiment of a backlight module of the present invention
  • FIG. 2 is a side view showing the structure of a second embodiment of the backlight module of the present invention.
  • FIG. 3 is a top plan view showing the structure of a second embodiment of the backlight module of the present invention.
  • FIG. 4 is a schematic structural view of an embodiment of a liquid crystal display according to the present invention.
  • Fig. 5 is a schematic view showing a display interface in an embodiment of the liquid crystal display of the present invention.
  • the backlight module includes a light guide plate 11 , a first light source 12 , and a second light source 13 .
  • the light guide plate 11 includes a light-emitting surface 111 and a bottom surface 112 opposite to each other, and a side surface 113 that is in contact with the light-emitting surface 111 and the bottom surface 112.
  • the light-emitting surface 111 and the bottom surface 112 together define the thickness of the light guide plate 11.
  • the light guide plate 11 includes at least a relatively thick first portion and a relatively thin second portion; the first light source 12 is disposed opposite to the side of the light guide plate 11, and the second light source 13 is disposed opposite to the bottom surface 112 or the light exit surface 111 at the second portion of the light guide plate.
  • the first light source 12 is disposed on a thin side surface 113 of the light guide plate 11 .
  • the first light source 12 may also be disposed on a thick side of the light guide plate 11 .
  • the second light source 13 is disposed on the inner side of the plastic frame 15 corresponding to the thin bottom surface of the light guide plate 11 .
  • the second light source 13 may also be disposed on the light guide plate 11 . The light exit or bottom of the second part.
  • the light guide plate 11 is made of an optical grade acrylic/PC sheet.
  • the light guiding point 14 may be printed on the bottom surface of the light guide plate 11 by UV (ultraviolet) screen printing technology using a material having extremely high reflectivity and no light absorption.
  • the angle is too large, the direction of light propagation is almost parallel to the light exiting surface 111, so that the light is totally reflected on the light exiting surface 111 and cannot be incident; when the light enters the thicker first portion of the light guide plate 11, the light is scattered and passes through the light guide plate 11 The reflection of the side and the bottom surface of the thicker first portion gradually decreases the incident angle of the light and the light exiting surface 111, the total reflection condition is broken, and then escapes from the light exiting surface 111 to illuminate the display panel.
  • the plurality of light guiding points 14 can diverge the light more uniformly in various directions, so that the outgoing light is more uniform.
  • the light guiding point 14 may be a dot, a bump, or a V-cut structure.
  • the light directly exits through the thinner second portion of the light guide plate 11 and illuminates the display panel.
  • the thicker first portion and the thinner second portion of the light guide plate 11 correspond to the first display area and the second display area, respectively.
  • the first light source 12 is illuminated
  • the second light source 13 is illuminated
  • the first light source 12 is simultaneously illuminated.
  • a second light source 13 is illuminated
  • a diffusing plate may be disposed on the light emitting surface 111 of the light guide plate 11 to uniformly emit light.
  • the present embodiment combines the direct type and the side-entry backlight to enable the display device to realize the split screen display of the display device, and at the same time, the power consumption of the display device can be reduced because it is not necessary to use all the direct-type backlights with high energy consumption. .
  • FIG. 2 is a schematic side view showing the structure of a second embodiment of the backlight module of the present invention
  • FIG. 3 is a schematic top view of the second embodiment of the backlight module of the present invention
  • the backlight module includes: a light guide plate 21 and the first light source 22 and the second light source 23.
  • the light guide plate 21 includes a light-emitting surface 211 and a bottom surface 212 opposite to each other, and a side surface 213 that is adjacent to the light-emitting surface 211 and the bottom surface 212.
  • the light-emitting surface 211 and the bottom surface 212 together define the thickness of the light guide plate 21.
  • the light guide plate 21 includes at least a relatively thick first portion and a relatively thin second portion; the first light source 22 is disposed opposite to the side of the light guide plate 21, and the second light source 23 is disposed opposite to the bottom surface 212 or the light exit surface 211 at the second portion of the light guide plate.
  • the total thickness of the second portion of the second light source 23 and the light guide plate 21 is not greater than the thickness of the first portion of the light guide plate 21.
  • the first portion of the light guide plate 21 is a wedge plate, and the second portion of the light guide plate 21 is a flat plate having a uniform thickness.
  • One end of the second portion of the light guide plate 21 is connected to the thin end of the first portion of the light guide plate 21, and the second light source 23 is adjacent to the second light source 23.
  • the bottom surface of the second portion of the light guide plate 21 is disposed, and the first light source 22 is disposed adjacent to the other end of the second portion of the light guide plate 21.
  • the bottom surface of the first portion of the light guide plate 21 is a step, wherein each layer of the step is connected as a slope.
  • a dot, a bump, or a V-cut structure may be disposed on the step bottom surface of the first portion of the light guide plate 21.
  • the first light source 22 and the second light source 23 are point light sources, surface light sources or line light sources.
  • the first light source 22 and the second light source 23 may be LED light sources. It can be understood that the number of the first light source 22 and the second light source 23 shown in FIG. 2 and FIG. 3 is schematic, and the number of the light sources is not limited. The number of the first light source 22 and the second light source 23 can be according to the display screen. The size or intensity of the light source can be arbitrarily set.
  • the lighting modes of the first light source 22 and the second light source 23 at least include that the first light source 22 and the second light source 23 are simultaneously lit, the first light source 22 is turned off, and the second light source is turned on 23.
  • the first light source 22 when the first light source 22 is illuminated, the light enters from the side 213 of the thinner second portion of the light guide plate 21 due to the light relative to the light exiting surface.
  • the incident angle of 211 is too large, and the light propagation direction is almost parallel with the light exit surface 211, so that the light is totally reflected on the light exit surface 211 and cannot be incident; when the light enters the thicker first portion of the light guide plate 21, the light is scattered and passes through.
  • FIG. 4 is a schematic structural diagram of an embodiment of a liquid crystal display according to the present invention.
  • the liquid crystal display includes a display panel 41 and a backlight module 42 stacked in a stack.
  • the display panel 41 may include an array substrate, a color filter substrate, and a liquid crystal disposed between the array substrate and the color filter substrate, and may further include upper and lower polarizers.
  • the backlight module 42 includes: a light guide plate and a first light source and a second light source; wherein the light guide plate includes a light-emitting surface and a bottom surface disposed opposite to each other, and a side surface that is adjacent to the light-emitting surface and the bottom surface, and the light-emitting surface of the light guide plate is adjacent to the light-emitting surface
  • the display panel is disposed; the light-emitting surface and the bottom surface jointly define a thickness of the light guide plate, the light guide plate includes at least a relatively thick first portion and a relatively thin second portion; the first light source is disposed opposite to the side of the light guide plate, and the second light source is opposite to the light guide plate
  • the bottom surface or the light exit surface at the second part is set.
  • the lighting modes of the first light source and the second light source at least include: the first light source and the second light source are simultaneously lit, the first light source is turned off, and the second light source is turned on, and when the second light source is lit, the display is performed.
  • the panel is only displayed in the area corresponding to the second part of the light guide.
  • the first portion of the light guide plate is a wedge plate
  • the second portion of the light guide plate is a flat plate having a uniform thickness
  • one end of the second portion of the light guide plate is connected to the thin end of the first portion of the light guide plate
  • the second light source is adjacent to the light guide plate.
  • the bottom surface of the two portions is disposed, and the first light source is disposed adjacent to the other end of the second portion of the light guide plate.
  • the bottom surface of the first portion of the light guide plate is a step, a mesh point, a collision point or a V-cut structure.
  • the total thickness of the second portion of the second light source and the light guide plate is not greater than the thickness of the first portion of the light guide plate, and the first light source and the second light source are point light sources, surface light sources, or line light sources.
  • liquid crystal display provided by the embodiment is another embodiment of the backlight module according to the above embodiment.
  • the structure and specific implementation principle of the backlight module can refer to the above embodiments and corresponding drawings. Narration.
  • FIG. 5 is a schematic diagram of a display interface in an embodiment of the liquid crystal display of the present invention, wherein the first display area 51 corresponds to a thicker area (or a wedge-shaped area) of the light guide plate, and the second display area 52 corresponds to a light guide plate. Thinner area.
  • the first display area 51 displays a screen
  • the second display area 52 displays a screen.
  • the first display area 51 and the first display area The two display areas 52 simultaneously display the picture.
  • the liquid crystal display of the present embodiment includes: a display panel and a backlight module which are arranged in a stack, the backlight module includes: a light guide plate, a first light source, and a second light source; wherein the light guide plate includes opposite light emitting surfaces And a bottom surface, and a side surface connected to the light emitting surface and the bottom surface, the light emitting surface of the light guide plate is disposed adjacent to the display panel; the light emitting surface and the bottom surface jointly define a thickness of the light guide plate, and the light guide plate includes at least a relatively thick first portion and a relatively thin portion The second portion is disposed opposite to the side of the light guide plate, and the second light source is disposed opposite to the bottom surface or the light exit surface at the second portion of the light guide plate.
  • the present embodiment combines the direct type and the side-in type backlight, so that the display device can realize the split screen display of the liquid crystal display, and at the same time, the power consumption of the liquid crystal display can be reduced because it is not necessary to use all the direct-type backlights with high energy consumption. .

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

Abstract

一种背光模组（42）以及液晶显示器，该背光模组（42）包括：导光板（11，21）及第一光源（12，22）、第二光源（13，23）；其中，导光板（11，21）包括相对设置的出光面（111，211）和底面（112，212），以及与出光面（111，211）和底面（112，212）均相接的侧面（113，213）；出光面（111，211）与底面（112，212）共同定义导光板（11，21）的厚度，导光板（11，21）至少包括相对较厚的第一部分及相对较薄的第二部分；第一光源（12，22）相对导光板（11，21）侧边设置，第二光源（13，23）相对导光板（11，21）第二部分处的底面（112，212）或出光面（111，211）设置。通过上述方式，能够实现显示设备的分屏显示，同时能够减小显示设备的功耗。

Description

背光模组以及液晶显示器
【技术领域】
本发明涉及显示技术领域，特别是涉及背光模组以及液晶显示器。
【背景技术】
在传统的LCD（liquid crystal display，液晶显示器）中，由于LCD的面板本身并不发光，需要借助外加光源才能进行显示，通常这样的光源有背光源和反射式光源两种，由于背光式光源无需受环境变化，所以目前的LCD显示器中的光源几乎都为背光式光源。
在LCD背光源中，光源类型经历了从CCFL（Cold Cathode Fluorescent Lamp，冷阴极荧光灯管）到LED（Light Emitting Diode，发光二极管）两种光源。由于LED具有体积小，响应时间快，寿命长，不易碎，色域高，封装体种类多等等优点，目前已成为背光源的主流。LED背光基本可以分为侧入式背光和直下式背光。
随着液晶显示器的功能的逐渐完善，常常会遇到到分屏显示、局部显示等情况，但现有侧入式背光源很难在满足低功耗地前提下实现上述功能，而直下式的背光源虽然能够完成上述功能，但具有功耗较大、重量大、成本高等缺点。
【发明内容】
本发明主要解决的技术问题是提供背光模组以及液晶显示器，能够实现显示设备的分屏显示，同时能够减小显示设备的功耗。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种背光模组，其中，包括：导光板及第一光源、第二光源；其中，导光板包括相对设置的出光面和底面，以及与出光面和底面均相接的侧面；出光面与底面共同定义导光板的厚度，导光板至少包括相对较厚的第一部分及相对较薄的第二部分；导光板的第一部分是楔形板，导光板的第二部分是厚度一致的平板，导光板第二部分的一端与导光板第一部分的薄端相接，第二光源邻近导光板第二部分的底面设置，第一光源邻近导光板第二部分的另一端设置；其中，第一光源和第二光源的点亮模式至少包括：第一光源和第二光源同时点亮、第一光源熄灭而第二光源点亮。
其中，导光板第一部分的底面是阶梯、网点、撞点或者V-cut结构。
其中，第二光源和导光板第二部分的总厚度不大于导光板第一部分的厚度，第一光源、第二光源是点光源、面光源或线光源。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种背光模组，该背光模组包括：导光板及第一光源、第二光源；其中，导光板包括相对设置的出光面和底面，以及与出光面和底面均相接的侧面；出光面与底面共同定义导光板的厚度，导光板至少包括相对较厚的第一部分及相对较薄的第二部分；第一光源相对导光板侧边设置，第二光源相对导光板第二部分处的底面或出光面设置。
其中，第一光源和第二光源的点亮模式至少包括：第一光源和第二光源同时点亮、第一光源熄灭而第二光源点亮。
其中，导光板的第一部分是楔形板，导光板的第二部分是厚度一致的平板，导光板第二部分的一端与导光板第一部分的薄端相接，第二光源邻近导光板第二部分的底面设置，第一光源邻近导光板第二部分的另一端设置。
其中，导光板第一部分的底面是阶梯、网点、撞点或者V-cut结构。
其中，第二光源和导光板第二部分的总厚度不大于导光板第一部分的厚度，第一光源、第二光源是点光源、面光源或线光源。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种液晶显示器，该液晶显示器包括：层叠设置的显示面板和背光模组，背光模组包括：导光板及第一光源、第二光源；其中，导光板包括相对设置的出光面和底面，以及与出光面和底面均相接的侧面，导光板的出光面邻近显示面板设置；出光面与底面共同定义导光板的厚度，导光板至少包括相对较厚的第一部分及相对较薄的第二部分；第一光源相对导光板侧边设置，第二光源相对导光板第二部分处的底面或出光面设置。
其中，第一光源和第二光源的点亮模式至少包括：第一光源和第二光源同时点亮、第一光源熄灭而第二光源点亮，且在第二光源点亮时，显示面板仅在对应导光板第二部分的区域显示。
其中，导光板的第一部分是楔形板，导光板的第二部分是厚度一致的平板，导光板第二部分的一端与导光板第一部分的薄端相接，第二光源邻近导光板第二部分的底面设置，第一光源邻近导光板第二部分的另一端设置。
其中，导光板第一部分的底面是阶梯、网点、撞点或者V-cut结构。
其中，第二光源和导光板第二部分的总厚度不大于导光板第一部分的厚度，第一光源、第二光源是点光源、面光源或线光源。
本发明的有益效果是：区别于现有技术的情况，本发明的背光模组包括：导光板及第一光源、第二光源；其中，导光板包括相对设置的出光面和底面，以及与出光面和底面均相接的侧面；出光面与底面共同定义导光板的厚度，导光板至少包括相对较厚的第一部分及相对较薄的第二部分；第一光源相对导光板侧边设置，第二光源相对导光板第二部分处的底面或出光面设置。通过上述方式，本实施方式结合直下式和侧入式背光，使显示设备能够实现显示设备的分屏显示，同时，由于无需全部使用能耗大的直下式背光，能够减小显示设备的功耗。
【附图说明】
图1是本发明背光模组第一实施方式的结构侧视示意图；
图2是本发明背光模组第二实施方式的结构侧视示意图；
图3是本发明背光模组第二实施方式的结构俯视示意图；
图4是本发明液晶显示器一实施方式的结构示意图；
图5是本发明液晶显示器一实施方式中显示界面的示意图。
【具体实施方式】
参阅图1，图1是本发明背光模组第一实施方式的结构侧视示意图，该背光模组包括：导光板11及第一光源12、第二光源13。
其中，导光板11包括相对设置的出光面111和底面112，以及与出光面111和底面112均相接的侧面113；出光面111与底面112共同定义导光板11的厚度，导光板11至少包括相对较厚的第一部分及相对较薄的第二部分；第一光源12相对导光板11侧边设置，第二光源13相对导光板第二部分处的底面112或出光面111设置。
其中，图1示出的第一光源12设置于导光板11较薄的一侧面113，可选的，在其他实施方式中，第一光源12也可以设置于导光板11较厚的一侧面。
其中，图1示出的第二光源13设置于对应导光板11较薄底面的胶框15内侧面，可选的，在其他实施方式中，第二光源13也可以设置于导光板11较薄的第二部分的出光面或底面。
具体地，导光板11是利用光学级的亚克力/PC板材制成的。可选的，在一种实施方式中，可以用具有极高反射率且不吸光的材料，在导光板11底面用UV（紫外）网版印刷技术印上导光点14。
同时参阅图1的光路（即图1中的虚线箭头），在第一光源12的照射下，光线从导光板11较薄的第二部分的侧面113进入，由于光线相对于出光面111的入射角过大，光线传播方向几乎与出光面111平行，使得光线在出光面111产生全反射，无法入射；当光线进入导光板11较厚的第一部分时，光线发散开来，经过导光板11较厚的第一部分的侧面以及底面的反射，光线与出光面111的入射角逐渐减小，全反射条件被破坏，继而从出光面111逸出，对显示面板进行照射。
可选的，在导光板11中设置了导光点14的情况下，多个导光点14能够使光线更加均匀的朝着各个方向发散，使出射光更加均一。
可选的，该导光点14可以是网点、撞点或者V-cut结构。
而在第二光源13的照射情况下，光线直接通过导光板11较薄的第二部分出射并照射显示面板。
在显示时，导光板11中较厚的第一部分和较薄的第二部分分别对应第一显示区域和第二显示区域。当仅需要第一显示区域显示时，则点亮第一光源12，当仅需要第二显示区域显示时，则点亮第二光源13，当需要全屏显示时，则同时点亮第一光源12和第二光源13。
可选的，在该导光板11的出光面111上，还可以设置一层扩散板，以使光线均一的射出。
区别于现有技术，本实施方式的背光模组包括：导光板及第一光源、第二光源；其中，导光板包括相对设置的出光面和底面，以及与出光面和底面均相接的侧面；出光面与底面共同定义导光板的厚度，导光板至少包括相对较厚的第一部分及相对较薄的第二部分；第一光源相对导光板侧边设置，第二光源相对导光板第二部分处的底面或出光面设置。通过上述方式，本实施方式结合直下式和侧入式背光，使显示设备能够实现显示设备的分屏显示，同时，由于无需全部使用能耗大的直下式背光，能够减小显示设备的功耗。
参阅图2和图3，图2是本发明背光模组第二实施方式的结构侧视示意图，图3是本发明背光模组第二实施方式的结构俯视示意图，该背光模组包括：导光板21及第一光源22、第二光源23。
其中，导光板21包括相对设置的出光面211和底面212，以及与出光面211和底面212均相接的侧面213；出光面211与底面212共同定义导光板21的厚度，导光板21至少包括相对较厚的第一部分及相对较薄的第二部分；第一光源22相对导光板21侧边设置，第二光源23相对导光板第二部分处的底面212或出光面211设置。
其中，第二光源23和导光板21第二部分的总厚度不大于导光板21第一部分的厚度。
其中，导光板21的第一部分是楔形板，导光板21的第二部分是厚度一致的平板，导光板21第二部分的一端与导光板21第一部分的薄端相接，第二光源23邻近导光板21第二部分的底面设置，第一光源22邻近导光板21第二部分的另一端设置。
具体地，导光板21的第一部分的底面为阶梯，其中阶梯的每一层连接出为斜面。
可选的，还可以在导光板21的第一部分的阶梯底面上设置网点、撞点或者V-cut结构。
可选的，第一光源22、第二光源23是点光源、面光源或线光源。例如，第一光源22、第二光源23可以是LED光源。可以理解的，图2和图3中示出的第一光源22、第二光源23的数量是示意的，并不限制光源的数量，第一光源22、第二光源23的数量可以根据显示屏的大小或光源的强度来任意设置。
其中，第一光源22和第二光源23的点亮模式至少包括：第一光源22和第二光源23同时点亮、第一光源22熄灭而第二光源点亮23。
具体地，同时参阅图2的光路（即图2中的虚线箭头），在第一光源22点亮时，光线从导光板21较薄的第二部分的侧面213进入，由于光线相对于出光面211的入射角过大，光线传播方向几乎与出光面211平行，使得光线在出光面211产生全反射，无法入射；当光线进入导光板21较厚的第一部分时，光线发散开来，经过导光板21较厚的第一部分的阶梯以及另一较厚侧面的反射，光线与出光面211的入射角逐渐减小，全反射条件被破坏，继而从出光面211逸出，对显示面板进行照射。
参阅图4，图4是本发明液晶显示器一实施方式的结构示意图，该液晶显示器包括：层叠设置的显示面板41和背光模组42。
可选的，其中，显示面板41可以包括阵列基板、彩膜基板以及设置于阵列基板、彩膜基板之间的液晶，还可以包括上、下偏光片等。
其中，背光模组42包括：导光板及第一光源、第二光源；其中，导光板包括相对设置的出光面和底面，以及与出光面和底面均相接的侧面，导光板的出光面邻近显示面板设置；出光面与底面共同定义导光板的厚度，导光板至少包括相对较厚的第一部分及相对较薄的第二部分；第一光源相对导光板侧边设置，第二光源相对导光板第二部分处的底面或出光面设置。
可选的，第一光源和第二光源的点亮模式至少包括：第一光源和第二光源同时点亮、第一光源熄灭而第二光源点亮，且在第二光源点亮时，显示面板仅在对应导光板第二部分的区域显示。
可选的，导光板的第一部分是楔形板，导光板的第二部分是厚度一致的平板，导光板第二部分的一端与导光板第一部分的薄端相接，第二光源邻近导光板第二部分的底面设置，第一光源邻近导光板第二部分的另一端设置。
可选的，导光板第一部分的底面是阶梯、网点、撞点或者V-cut结构。
可选的，第二光源和导光板第二部分的总厚度不大于导光板第一部分的厚度，第一光源、第二光源是点光源、面光源或线光源。
可以理解的，本实施方式提供的液晶显示器是基于上述实施方式背光模组的另一实施方式，其中的背光模组的结构和具体实施原理可以参考上述实施方式以及相应的附图，这里不再赘述。
如图图5所示，图5是本发明液晶显示器一实施方式中显示界面的示意图，其中第一显示区域51对应导光板的较厚区（或楔形区），第二显示区域52对应导光板的较薄区。
当第一光源点亮时，第一显示区域51显示画面，第二光源点亮时，第二显示区域52显示画面，第一光源和第二光源同时点亮时，第一显示区域51和第二显示区域52同时显示画面。
区别于现有技术，本实施方式的液晶显示器包括：层叠设置的显示面板和背光模组，背光模组包括：导光板及第一光源、第二光源；其中，导光板包括相对设置的出光面和底面，以及与出光面和底面均相接的侧面，导光板的出光面邻近显示面板设置；出光面与底面共同定义导光板的厚度，导光板至少包括相对较厚的第一部分及相对较薄的第二部分；第一光源相对导光板侧边设置，第二光源相对导光板第二部分处的底面或出光面设置。通过上述方式，本实施方式结合直下式和侧入式背光，使显示设备能够实现液晶显示器的分屏显示，同时，由于无需全部使用能耗大的直下式背光，能够减小液晶显示器的功耗。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (14)

  1. 一种背光模组，其中，包括：
    导光板及第一光源、第二光源；
    其中，所述导光板包括相对设置的出光面和底面，以及与所述出光面和底面均相接的侧面；
    所述出光面与所述底面共同定义所述导光板的厚度，所述导光板至少包括相对较厚的第一部分及相对较薄的第二部分；
    所述导光板的第一部分是楔形板，所述导光板的第二部分是厚度一致的平板，所述导光板第二部分的一端与所述导光板第一部分的薄端相接，所述第二光源邻近所述导光板第二部分的底面设置，所述第一光源邻近所述导光板第二部分的另一端设置；
    其中，所述第一光源和所述第二光源的点亮模式至少包括：所述第一光源和所述第二光源同时点亮、所述第一光源熄灭而所述第二光源点亮。
  2. 根据权利要求1所述的背光模组，其中，
    所述导光板第一部分的底面是阶梯、网点、撞点或者V-cut结构。
  3. 根据权利要求2所述的背光模组，其中，
    所述第二光源和所述导光板第二部分的总厚度不大于所述导光板第一部分的厚度，所述第一光源、第二光源是点光源、面光源或线光源。
  4. 根据权利要求1所述的背光模组，其中，
    所述第二光源和所述导光板第二部分的总厚度不大于所述导光板第一部分的厚度，所述第一光源、第二光源是点光源、面光源或线光源。
  5. 一种背光模组，其中，包括：
    导光板及第一光源、第二光源；
    其中，所述导光板包括相对设置的出光面和底面，以及与所述出光面和底面均相接的侧面；
    所述出光面与所述底面共同定义所述导光板的厚度，所述导光板至少包括相对较厚的第一部分及相对较薄的第二部分；
    所述第一光源相对所述导光板侧边设置，所述第二光源相对所述导光板第二部分处的底面或出光面设置。
  6. 根据权利要求5所述的背光模组，其中，
    所述第一光源和所述第二光源的点亮模式至少包括：所述第一光源和所述第二光源同时点亮、所述第一光源熄灭而所述第二光源点亮。
  7. 根据权利要求5所述的背光模组，其中，
    所述导光板的第一部分是楔形板，所述导光板的第二部分是厚度一致的平板，所述导光板第二部分的一端与所述导光板第一部分的薄端相接，所述第二光源邻近所述导光板第二部分的底面设置，所述第一光源邻近所述导光板第二部分的另一端设置。
  8. 根据权利要求7所述的背光模组，其中，
    所述导光板第一部分的底面是阶梯、网点、撞点或者V-cut结构。
  9. 根据权利要求5所述的背光模组，其中，
    所述第二光源和所述导光板第二部分的总厚度不大于所述导光板第一部分的厚度，所述第一光源、第二光源是点光源、面光源或线光源。
  10. 一种液晶显示器，其中，包括：
    层叠设置的显示面板和背光模组，所述背光模组包括：
    导光板及第一光源、第二光源；
    其中，所述导光板包括相对设置的出光面和底面，以及与所述出光面和底面均相接的侧面，所述导光板的出光面邻近所述显示面板设置；
    所述出光面与所述底面共同定义所述导光板的厚度，所述导光板至少包括相对较厚的第一部分及相对较薄的第二部分；
    所述第一光源相对所述导光板侧边设置，所述第二光源相对所述导光板第二部分处的底面或出光面设置。
  11. 根据权利要求10所述的液晶显示器，其中，
    所述第一光源和所述第二光源的点亮模式至少包括：所述第一光源和所述第二光源同时点亮、所述第一光源熄灭而所述第二光源点亮，且在所述第二光源点亮时，所述显示面板仅在对应所述导光板第二部分的区域显示。
  12. 根据权利要求10所述的液晶显示器，其中，
    所述导光板的第一部分是楔形板，所述导光板的第二部分是厚度一致的平板，所述导光板第二部分的一端与所述导光板第一部分的薄端相接，所述第二光源邻近所述导光板第二部分的底面设置，所述第一光源邻近所述导光板第二部分的另一端设置。
  13. 根据权利要求12所述的液晶显示器，其中，
    所述导光板第一部分的底面是阶梯、网点、撞点或者V-cut结构。
  14. 根据权利要求10所述的液晶显示器，其中，
    所述第二光源和所述导光板第二部分的总厚度不大于所述导光板第一部分的厚度，所述第一光源、第二光源是点光源、面光源或线光源。
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