WO2017028358A1 - 液晶显示装置及其背光模组 - Google Patents

液晶显示装置及其背光模组 Download PDF

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Publication number
WO2017028358A1
WO2017028358A1 PCT/CN2015/090128 CN2015090128W WO2017028358A1 WO 2017028358 A1 WO2017028358 A1 WO 2017028358A1 CN 2015090128 W CN2015090128 W CN 2015090128W WO 2017028358 A1 WO2017028358 A1 WO 2017028358A1
Authority
WO
WIPO (PCT)
Prior art keywords
disposed
light guide
backlight
guide plate
light
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/CN2015/090128
Other languages
English (en)
French (fr)
Inventor
樊勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/784,706 priority Critical patent/US9933561B2/en
Publication of WO2017028358A1 publication Critical patent/WO2017028358A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0078—Side-by-side arrangements, e.g. for large area displays
    • 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
    • G02B6/0026—Wavelength selective element, sheet or layer, e.g. filter or grating
    • 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
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    • 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
    • G02B6/0051—Diffusing sheet or layer
    • G—PHYSICS
    • G02—OPTICS
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    • 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
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement 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
    • 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
    • G02B6/0056—Means for improving the coupling-out of light from the light guide for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements
    • 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
    • G02B6/0086—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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133612—Electrical details
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device

Definitions

  • the present invention relates to the field of display, and in particular to a backlight assembly and a liquid crystal display device using the same.
  • TFT-LCD Thin Film Transistor-Liquid Crystal Display, thin film transistor liquid crystal display
  • the TFT-LCD panel 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 changed by the environment. Therefore, the light sources in current TFT-LCD displays are almost all backlight sources.
  • CCFL Cold Cathode Fluorescent Tube, Cold Cathode Fluorescent Lamp
  • LED Light Emitting Diode
  • LEDs have become the mainstream of backlights due to their small size, fast response time, long life, non-breaking, high color gamut and many types of packages.
  • the LED backlight it can be basically divided into a side such as an optical LED backlight and a direct-lit LED backlight.
  • the QD tube Quantum dot
  • the tube, the quantum tube is placed in front of the LED and fixed. But currently due to QD
  • the tube and the light guide plate are limited by the machine table, and it is difficult to bend, which makes it impossible to exceed the oversized size (100 inches or more).
  • the invention provides a liquid crystal display device and a backlight module thereof, which mainly solve the prior art due to QD
  • the tube and the light guide plate are limited by the machine table, and it is difficult to bend, and it is impossible to achieve technical problems such as a wide size (over 100 inches).
  • a technical solution adopted by the present invention is to provide a backlight module including a back frame, a combined backlight unit, an optical component, and a plurality of dot reflection sheets, and the combined backlight unit is disposed in the back frame.
  • the combined backlight unit includes a plurality of sub-backlight units that are spliced at intervals; the optical components are disposed on the upper portion of the back frame and spaced apart from the upper portion of the combined backlight unit; and the plurality of dot reflection sheets are respectively disposed on the adjacent sub-backlight units
  • the upper portion is spaced apart to reduce the reflectance of light at intervals between adjacent sub-backlight units;
  • each sub-backlight unit includes a light guide plate, a circuit board, and a light source, the light guide plate has a light incident surface and The light-emitting surface has a microstructure; the circuit board is disposed on one side of the light guide plate and supports the dot reflection sheet; the light source is attached to the side of the circuit board and provides incident light to the light guide plate.
  • the light source comprises an LED and a quantum tube, and the LED is attached to the side of the circuit board; the quantum tube is disposed between the LED and the light guide plate.
  • the optical component includes a diffusion sheet and a support member.
  • the diffusion sheet is disposed above the combined backlight unit.
  • One end of the support member is disposed on the light guide plate, and the other end abuts against the diffusion sheet to support the diffusion sheet.
  • the height of the support member is 5-15 mm, and the diameter of the bottom surface is 2 mm-4 mm.
  • the width of the support member gradually decreases from bottom to top or gradually decreases from the middle to the both ends.
  • the back frame comprises a bottom plate, two vertical members, a first extension member and a second extension member, and the bottom plate supports the combined backlight unit; the two vertical members are respectively disposed on opposite sides of the bottom plate; the first extension member is disposed on the vertical member The inner and lateral extensions are for holding the light guide plate; and the second extension member is disposed in the vertical member and extends laterally to support the diffusion sheet.
  • the back frame further includes a fixing post connected to the bottom plate and disposed on at least one side of the light guide plate.
  • the back frame further includes a rotating buckle portion for fixing the light guide plate, the rotating buckle portion includes: a rotating portion and a pressing portion, wherein the rotating portion is rotated on the bottom plate; the pressing portion and the rotating portion The segments are connected and the light guide plate is fastened to the bottom plate.
  • a backlight module including a back frame, a combined backlight unit, an optical component, and a plurality of dot reflection sheets, and the combined backlight unit is disposed on the back frame.
  • the combined backlight unit includes a plurality of sub-backlight units that are spliced at intervals; the optical component is disposed at an upper portion of the back frame and spaced apart from the upper portion of the combined backlight unit; and the plurality of dot reflecting sheets are respectively disposed adjacent to the sub-backlight
  • the upper portion of the space between the cells is to reduce the reflectance of light at intervals between adjacent sub-backlight units.
  • Each sub-backlight unit includes a light guide plate, a circuit board, and a light source.
  • the circuit board is disposed on one side of the light guide plate and supports the dot reflection sheet.
  • the light source is attached to the side of the circuit board and provides incident light to the light guide plate.
  • the light source comprises an LED and a quantum tube, and the LED is attached to the side of the circuit board; the quantum tube is disposed between the LED and the light guide plate.
  • the LED is a blue LED.
  • the optical component includes a diffusion sheet and a support member.
  • the diffusion sheet is disposed above the combined backlight unit.
  • One end of the support member is disposed on the light guide plate, and the other end abuts against the diffusion sheet to support the diffusion sheet.
  • the height of the support member is 5-15 mm.
  • the width of the support member gradually decreases from bottom to top or gradually decreases from the middle to the both ends.
  • the optical component further includes a prism sheet, a brightness enhancement sheet, and a polarizer disposed at intervals above the diffusion sheet.
  • the back frame comprises a bottom plate, two vertical members, a first extension member and a second extension member, and the bottom plate supports the combined backlight unit; the two vertical members are respectively disposed on opposite sides of the bottom plate; the first extension member is disposed on the vertical member The inner and lateral extensions are for holding the light guide plate; and the second extension member is disposed in the vertical member and extends laterally to support the diffusion sheet.
  • another technical solution adopted by the present invention is to provide a liquid crystal display device including the above backlight module.
  • the invention has the beneficial effects that the liquid crystal display device and the backlight module thereof of the present invention are different from the prior art, and the large-sized backlight unit in the prior art is designed to be spliced by a plurality of sub-backlight units, thereby reducing the surface.
  • the bending difficulty of the light guide plate in the large-screen display, and the cost of using the single-chip backlight unit is small, resulting in a simple process and convenient mass production.
  • the quantum tube can be arranged at the interval between adjacent sub-backlight units, and it is not necessary to fabricate an oversized quantum tube, which is convenient for the application of the quantum tube in an oversized display, that is, the brightness and contrast of the backlight are improved, and the adjacent sub-backlight unit A dot reflecting sheet is arranged above the interval to reduce the reflectivity of the mixed light at the interval, and enhance the scattering rate of the mixed light at the interval, thereby improving the uniformity of the light emitted by the backlight module.
  • FIG. 1 is a schematic structural view of a backlight module of the present invention
  • Figure 2 is a cross-sectional view of the backlight module of Figure 1 taken along line A-A;
  • FIG. 3 is a schematic structural view of a light guide plate of the backlight module of FIG. 1;
  • Figure 4 is a plan view showing the distribution of the first extension member of another embodiment of Figure 1;
  • Figure 5 is a cross-sectional view showing the connection of the bottom plate of the back frame of the other embodiment of Figure 2 to the light guide plate;
  • Figure 6 is a left side view of the bottom plate of the back frame of Figure 1 connected to the light guide plate;
  • Fig. 7 is a schematic structural view of a liquid crystal display device of the present invention.
  • FIG. 1 is a schematic structural view of a backlight module of the present invention
  • FIG. 2 is a cross-sectional view of the backlight module of FIG.
  • the backlight module 1 of the present invention includes a back frame 10, a combined backlight unit 20, an optical component 30, and a plurality of dot reflection sheets 40.
  • the combined backlight unit 20 is disposed at a lower portion of the back frame 10, and the combined backlight unit 20 includes a plurality of sub-backlight units 200 (shown by a broken line frame in FIG. 2).
  • the optical assembly 30 is disposed on the back frame.
  • the upper portion of the 10 is spaced above the combined backlight unit 20, and the plurality of dot reflecting sheets 40 are respectively disposed above the interval 201 between the adjacent sub-backlight units 200 to reduce the gap between the adjacent sub-backlight units 200.
  • the reflectance of the light at the interval 201 is
  • each sub-backlight unit 200 includes a light guide plate 210, a circuit board 220, and a light source 230.
  • the light guide plate 210 may be an ordinary printed light guide plate 210 or a light guide plate 210 having a microstructure 211.
  • FIG. 3 is a schematic diagram of the light guide plate of the backlight module of FIG.
  • the light guide plate 210 has a light-incident surface 212 and a light-emitting surface 213.
  • the microstructure 211 is disposed on the light-emitting surface 213.
  • the microstructure 211 of the present invention may have a strip-like triangle shape and is spaced apart from the light-emitting surface 213.
  • the undulating triangle may be alternately arrayed or cross-shaped with strip-shaped triangles and wavy triangles.
  • the circuit board 220 is disposed on one side of the light guide plate 210 and supports the dot reflection sheet 40.
  • the light source 230 is attached to the side of the circuit board 220 and provides incident light to the light guide plate 210.
  • the light source 230 includes an LED 231 and a quantum tube 232, and the LED 231 is attached to the side of the circuit board 220. Quantum tube 232 is set on LED 231 is between the light guide plate 210.
  • the LED 231 is preferably a blue LED 231. It should be noted that in other embodiments, the light source 230 may also be only an LED. 231, there is no need to set the quantum tube 232.
  • the optical component 30 includes a diffusion sheet 310 and a support member 320 .
  • the diffusion sheet 310 is spaced apart from the combined backlight unit 20 .
  • One end of the support member 320 is disposed on the light guide plate 210 , and the other end abuts against the diffusion sheet 310 to support the diffusion sheet 310 .
  • the support member 320 may be adhered to the light-emitting surface 213 of the light guide plate 210 by glue, or a counterbore matching the support member 320 may be disposed on the light guide plate 210 for fixing the support member.
  • the support member 320 has a height of 5-15 mm, and the support member 320 can be a light guide column having a light-transmitting and uniform light effect.
  • the light guide column can be square and circular, and the light guide column has a bottom surface and diffusion with the light guide plate 210.
  • the top end of the sheet 310 is contacted, and the width or diameter of the bottom surface is 2-4 mm.
  • the width of the support member 320 of the present invention is gradually reduced from bottom to top. Specifically, when the width or diameter of the bottom surface of the light guide column is 2 mm, the width or diameter of the tip end is less than 2 mm, preferably 0.1 mm. Of course, in order to avoid the occurrence of poor light transmission between the support member 320 and the light guide plate 210, the width of the support member 320 may also gradually decrease from the middle to the both ends.
  • the middle width or diameter of the light guide column is At 2 mm
  • the width and diameter of the top and bottom surfaces are less than 2 mm, preferably 0.1 mm, or the width or diameter of the top and bottom surfaces is less than 4 mm, preferably 1 mm, when the intermediate width or diameter of the light guiding column is 4 mm.
  • the optical module 30 of the present invention further includes a prism sheet 330, a light-increasing sheet 340, and a polarizer 350 which are disposed at intervals in the vertical direction of the diffusion sheet 310.
  • the dot reflection sheet 40 of the present invention is composed of a reflection sheet (not shown) and a halftone dot (not shown) distributed on the reflection sheet, and the mixed light in the space 201 between the adjacent light guide plates 210 mainly comes from the light source 230 and the guide.
  • the light scatters the light of the light plate 210, which causes the light of the space 201 to be uneven. Therefore, in the embodiment, a reflection sheet is disposed at the space 201 for reflecting the light of the dispersed light. Since the scattered light forms a light spot on the reflection sheet, the reflection sheet is formed on the reflection sheet.
  • a plurality of dots are distributed to reduce the reflectance of the reflective sheet in the spot area.
  • the intensity of the light received by the diffuser plate 310 facing the region of the light source 230 is weakened, the scattering rate of the region is enhanced, and the intensity of the light output through the diffuser plate 310 is then uniformized.
  • the back frame 10 of the present invention includes a bottom plate 110, two vertical members 120, a first extension member 130, and a second extension member 140.
  • the bottom plate 110 supports the combined backlight unit 20.
  • the light guide plate 210 of the combined backlight unit 20 is spaced apart from the bottom plate 110.
  • a spacing 201 is formed between adjacent light guide plates 210, and the circuit board 220 stands at the interval 201.
  • the circuit board 220 has an upper end, a lower end, a left side surface, and a right side surface.
  • the upper end supports the dot reflection sheet 40, and the lower end is disposed on the bottom plate 110, and the LED 231 is disposed on the left side or the right side, and the quantum tube 232 is disposed on the LED
  • the back frame 10 may further include a support block (not shown).
  • the support block is disposed on the bottom plate 110 to support the quantum tube 232.
  • the bottom plate 110 may be square or circular.
  • the two vertical members 120 are respectively disposed on opposite sides of the bottom plate 110.
  • the vertical member 120 may be designed around the bottom plate 110, and the bottom plate 110 is When circular, the vertical member 120 is enclosed on its edge. It is also possible to use the bottom frame instead of the bottom plate 110.
  • the two ends of the light guide plate 210 are placed on the bottom frame to reduce the contact area of the light guide plate 210 and improve the heat dissipation effect of the light guide plate 210.
  • the first extension member 130 is disposed in the vertical member 120 and extends laterally to press the light guide plate 210.
  • the first extension member 130 may be in the shape of a box or may be spaced apart on the vertical member 120.
  • FIG. 4 is a plan view showing a distribution of a first extension member of another embodiment of FIG. 1.
  • Each of the vertical members 120 is spaced apart from at least two first extension members 130, and each of the light guide plates 210 is opposite.
  • At least one of the first extension members 130 is disposed at each of the two ends.
  • a first extension member 130 is disposed at opposite ends of each of the light guide plates 210.
  • the second extension member 140 is disposed in the vertical member 120 and extends laterally to support the diffusion sheet 310.
  • the second extension member 140 may be in a frame shape to support the peripheral edge of the diffusion sheet 310, or may be distributed at intervals in the vertical member. 120 on.
  • the back frame 10 of the present invention further includes a fixing post 150.
  • the fixing post 150 is connected to the bottom plate 110 and disposed on at least one side of the light guide plate 210 to prevent the light guide plate 210 from moving to the left or right.
  • a fixing post 150 may also be disposed on both sides of the light guide plate 210.
  • the light guide plate 210 of the present invention can also be fixed to the bottom plate 110 by screws. Specifically, the bottom plate 110 and the light guide plate 210 are uniformly provided with through holes, and the screws are sequentially passed through the light guide plate 210 and the bottom plate 110, and the nut and the screw are matched to guide. The light panel 210 is locked to the bottom plate 110.
  • FIG. 5 is a top view of the bottom plate of the back frame of FIG. 2 connected to the light guide plate, and the screw includes a screw.
  • the cover 51 and the screw (not shown), the diameter of the screw cover 51 is more than twice that of the screw, and only the fixing holes are arranged on the bottom plate 110, and the light guide plate 210 is installed between the adjacent two fixing holes, because the screw cover 51 is provided.
  • the diameter of the screw cover 51 is more than twice that of the screw, that is, the screw cover 51 has a certain large area and can be pressed onto the light-emitting surface 213 of the light guide plate 210.
  • the screw is inserted into the fixing hole and cooperates with the nut, thereby fixing the light guide plate 210 to the same.
  • On the bottom plate 110 On the bottom plate 110.
  • FIG. 6 is a left side view of the bottom plate of the back frame of FIG. 1 connected to the light guide plate.
  • the light guide plate 210 may be fixed without using screws.
  • the bottom plate 110 is provided with a rotating buckle portion 60.
  • the rotating buckle portion 60 includes a pressing portion 61 and a rotating portion 62 connected to the pressing portion 61.
  • the pressing portion 61 is connected with the rotating portion 62 to form a "7" shape, and the rotating portion 62 rotates.
  • the pressing portion 61 fastens the light guide plate 210 to the bottom plate 110.
  • the opposite ends of each of the light guide plates 210 in the embodiment are respectively provided with at least one or more
  • the rotating buckle portion 60 is preferably provided with a rotating buckle portion 60 at opposite ends of each of the light guiding plates 210.
  • the optical path of the present invention can be mainly divided into four paths, and the first path is: LED The exiting light of 231 excites the quantum tube 232 to generate excitation light, and the excitation light sequentially enters the light guide plate 210, the diffusion plate 310, the prism sheet 330, the brightness enhancement sheet 340, the polarizer 350, etc.; the second path is: LED The exiting light of 231 excites the quantum tube 232 to generate excitation light, and the excitation light sequentially enters the halftone reflection sheet 40, the diffusion plate 310, the prism sheet 330, the brightness enhancement sheet 340, the polarizer 350, etc.; the third path is: LED The exiting light of 231 excites the quantum tube 232 to generate excitation light, which in turn enters the light guide plate 210, the dot reflection sheet 40, the diffusion plate 310, the prism sheet 330, the brightness enhancement sheet 340, the
  • the present invention also provides a liquid crystal display device 2 comprising the above-described backlight module 1.
  • the liquid crystal display device of the present invention and the backlight module 1 thereof have at least the following advantages:
  • the large-size backlight unit of the prior art is designed to be spaced and spliced by a plurality of sub-backlight units 200, which reduces the difficulty of bending the light guide plate 210 in the curved large-screen display;
  • the quantum tube 232 can be disposed at the interval 201 between the adjacent sub-backlight units 200, without the need to fabricate the oversized quantum tube 232, which facilitates the application of the quantum tube 232 in an oversized display, that is, improves the brightness of the backlight and Contrast
  • a dot reflection sheet 40 is disposed above the space 201 between the adjacent sub-backlight units 200, and the reflectance of the mixed light at the interval 201 is lowered, and the scattering rate of the mixed light at the interval 201 is enhanced to improve the backlight module 1 The uniformity of the emitted light.

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Abstract

一种液晶显示装置及其背光模组（1），组合式背光单元（20）设于背框（10）内的下部，组合式背光单元（20）包括间隔拼接的多个子背光单元（200）；光学组件（30）设于背框（10）内的上部且间隔设于组合式背光单元（20）的上方；及多个网点反射片（40）分别设于相邻子背光单元（200）之间的间隔处（201）的上方以降低相邻所述子背光单元（200）之间的间隔处（201）的光的反射率，减少了曲面大屏显示器中导光板（210）的弯曲难度，使量子管（232）可应用于超大尺寸的显示器中，提高背光的亮度和对比度。

Description

液晶显示装置及其背光模组
【技术领域】
本发明涉及显示领域，特别是涉及一种背光组件以及使用该背光模组的液晶显示装置。
【背景技术】
在传统的TFT-LCD（Thin Film Transistor-Liquid Crystal Display，薄膜晶体管液晶显示器）显示器中，由于TFT-LCD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TFT-LCD显示器中的光源几乎都为背光式光源。
在TFT-LCD背光源中，光源类型经历了从CCFL（冷阴极荧光灯管，Cold Cathode Fluorescent Lamp）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。
在LED背光源中，目前基本可以分为侧如光式LED背光和直下式LED背光。
为提高显示器的分辨率，制作背光源时把QD tube（quantum dot tube，量子管）放在LED前面，并对其固定即可。但目前由于QD tube和导光板受到机台限制，难以弯曲，导致无法做到超过超大尺寸（100inch以上）的宽幅。
【发明内容】
本发明提供一种液晶显示装置及其背光模组，主要解决现有技术中由于QD tube和导光板受到机台限制，难以弯曲，无法做到超过超大尺寸（100inch以上）的宽幅等技术问题。
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，其包括背框、组合式背光单元、光学组件以及多个网点反射片，组合式背光单元设于背框内的下部，组合式背光单元包括间隔拼接的多个子背光单元；光学组件设于背框内的上部且间隔设于组合式背光单元的上方；及多个网点反射片分别设于相邻子背光单元之间的间隔处的上方以降低相邻所述子背光单元之间的间隔处的光的反射率；其中，每一子背光单元包括导光板、电路板以及光源，导光板具有入光面和出光面，出光面具有微结构；电路板设于导光板的一侧并支撑网点反射片；光源贴设于电路板的侧面并向导光板提供入射光。
其中，光源包括LED和量子管，LED贴设于电路板的侧面；量子管设于LED与导光板之间。
其中，光学组件包括扩散片和支撑件，扩散片间隔设于组合式背光单元上方；支撑件一端设于导光板上，另一端抵接至扩散片以支撑扩散片。
其中，支撑件的高度为5-15mm，底面直径为2mm-4mm。
其中，所述支撑件的宽度由下至上逐渐减小或由中间往两端逐渐减小。
其中，背框包括底板、两块垂直件、第一延伸件以及第二延伸件，底板支撑组合式背光单元；两个垂直件分别设于底板相对的两侧；第一延伸件设于垂直件内并横向延伸以压持导光板；及，第二延伸件设于垂直件内并横向延伸以支撑扩散片。
其中，所述背框还包括固定柱，所述固定柱与所述底板连接并设于所述导光板的至少一侧。
其中，所述背框还包括固定所述导光板的旋转扣部，所述旋转扣部包括：旋转段和压持段，旋转段旋转设于所述底板上；压持段，与所述旋转段连接并将所述导光板扣于所述底板上。
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，其包括背框、组合式背光单元、光学组件以及多个网点反射片，组合式背光单元设于背框内的下部，组合式背光单元包括间隔拼接的多个子背光单元；光学组件设于背框内的上部且间隔设于组合式背光单元的上方；及多个网点反射片分别设于相邻子背光单元之间的间隔处的上方以降低相邻所述子背光单元之间的间隔处的光的反射率。
其中，每一子背光单元包括导光板、电路板以及光源，电路板设于导光板的一侧并支撑网点反射片；光源贴设于电路板的侧面并向导光板提供入射光。
其中，光源包括LED和量子管，LED贴设于电路板的侧面；量子管设于LED与导光板之间。
其中，LED为蓝光LED。
其中，光学组件包括扩散片和支撑件，扩散片间隔设于组合式背光单元上方；支撑件一端设于导光板上，另一端抵接至扩散片以支撑扩散片。
其中，支撑件的高度为5-15mm。
其中，支撑件的宽度由下至上逐渐减小或由中间往两端逐渐减小。
其中，光学组件还包括依次间隔设于扩散片上方的棱镜片、增光片以及偏光片。
其中，背框包括底板、两块垂直件、第一延伸件以及第二延伸件，底板支撑组合式背光单元；两个垂直件分别设于底板相对的两侧；第一延伸件设于垂直件内并横向延伸以压持导光板；及，第二延伸件设于垂直件内并横向延伸以支撑扩散片。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种液晶显示装置，其包括上述的背光模组。
本发明的有益效果是：区别于现有技术的情况，本发明的液晶显示装置及其背光模组，将现有技术中的大尺寸的背光单元设计成多个子背光单元间隔拼接，减少了曲面大屏显示器中导光板的弯曲难度，且采用单块子背光单元成本较小，造成工艺简单，方便大规模量产。相邻子背光单元之间的间隔处可设置量子管，无须制作超大尺寸的量子管，方便量子管在超大尺寸的显示器中的应用，即而提高背光的亮度和对比度，且相邻子背光单元之间的间隔处的上方设有网点反射片，降低间隔处混合光的反射率，增强间隔处混合光的散射率，从而提高背光模组出射光的均匀性。
【附图说明】
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图，其中：
图1是本发明的背光模组的结构示意图；
图2是图1背光模组的A-A的剖视图；
图3是图1中背光模组的导光板结构示意图；
图4是图1中另一实施例的第一延伸件分布的俯视图；
图5是图2中另一实施例的背框的底板与导光板连接的剖面图；
图6是图1中另一实施例的背框的底板与导光板连接的左视图；
图7是本发明的液晶显示装置的结构示意图。
【具体实施方式】
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，均属于本发明保护的范围。
请参阅图1，图1是本发明的背光模组的结构示意图，图2是图1背光模组的A-A的剖视图。
本发明的背光模组1包括背框10、组合式背光单元20、光学组件30以及多个网点反射片40。
其中，组合式背光单元20设于背框10内的下部，组合式背光单元20包括间隔拼接的多个子背光单元200（见图2中用虚线框表示的部件），光学组件30设于背框10内的上部且间隔设于组合式背光单元20的上方，多个网点反射片40分别设于相邻子背光单元200之间的间隔处201的上方以降低相邻子背光单元200之间的间隔处201的光的反射率。
具体而言，每一子背光单元200包括导光板210、电路板220以及光源230。
其中，导光板210可以是普通印刷的导光板210，也可以是具有微结构211的导光板210，具体地，请一并参阅图3，图3是图1中背光模组的导光板结构示意图，导光板210具有入光面212和出光面213，该微结构211设于出光面213上，本发明的微结构211可以呈条状的三角形，间隔设于出光面213上，当然，也可以呈波浪状的三角形，也可以是条状的三角形与波浪状的三角形交替阵列或交叉设置。
电路板220设于导光板210的一侧并支撑网点反射片40，光源230贴设于电路板220的侧面并向导光板210提供入射光。
光源230包括LED 231和量子管232，LED 231贴设于电路板220的侧面。量子管232设于LED 231与导光板210之间。LED 231优选蓝光LED 231。值得说明的是，在其它实施例中，光源230也可以仅仅为LED 231，不需要设置量子管232。
光学组件30包括扩散片310和支撑件320，扩散片310间隔设于组合式背光单元20上方，支撑件320一端设于导光板210上，另一端抵接至扩散片310以支撑扩散片310。支撑件320可以通过胶水粘于导光板210的出光面213上，也可以在导光板210上设置一与支撑件320匹配的沉孔，用于固定该支撑件。支撑件320的高度为5-15mm，支撑件320可以为具有透光、均光效果的导光柱，导光柱可以为方形也要以为圆形，导光柱具有与导光板210接触的底面和与扩散片310接触的顶端，底面的宽度或直径为2-4mm，为避免支撑件320与扩散片310接触之间出现透光效果不良现象，
本发明的支撑件320的宽度由下至上逐渐减小，具体地，导光柱的底面宽度或直径为2mm时，其顶端的宽度或直径小于2mm，优选0.1mm。当然，为进一步为避免支撑件320与导光板210接触之间出现透光效果不良现象，支撑件320的宽度也可以由中间向两端逐渐减小，具体地，导光柱的中间宽度或直径为2mm时，其顶端与底面的宽度或直径小于2mm，优选0.1mm，或者，导光柱的中间宽度或直径为4mm时，其顶端与底面的宽度或直径小于4mm，优选1mm。本发明的光学组件30还包括扩散片310的垂直方向上依次间隔设置的棱镜片330、增光片340以及偏光片350。
本发明的网点反射片40由反射片（图未示）与分布于反射片上的网点（图未示）构成，相邻导光板210之间的间隔处201中的混合光主要来自光源230和导光板210的分散光线，这导致间隔处201的光线不均匀，故本实施例在间隔处201设置反射片，用以对分散光线光进行反射，由于分散光线在反射片上形成光斑，故在反射片上分布设置多个网点，用以降低反射片在光斑区域的反射率。使得扩散板310正对光源230的区域所接收到的光线强度减弱，增强该区域的散射率，继而使通过扩散板310输出的光线强度均匀化。
如图1所示，本发明的背框10包括底板110、两块垂直件120、第一延伸件130以及第二延伸件140。
底板110支撑组合式背光单元20，具体地，组合式背光单元20中的导光板210间隔设于底板110上，相邻导光板210之间形成有间隔处201，电路板220立于间隔处201，电路板220具有上端、下端、左侧面、右侧面，上端支撑网点反射片40，下端设于底板110上，LED 231设于左侧面或右侧面上，量子管232设于LED 231与导光板210之间的底板110上，当然，背框10也可以进一步包括支撑块（图未示），支撑块设于底板110上以支撑量子管232。底板110可以是方形也可以是圆形，底板110为方形时两个垂直件120分别设于底板110相对的两侧，当然，也可以在底板110的四周均设计垂直件120，而底板110为圆形时，垂直件120围合设于其边缘上。当然也可以使用底框代替底板110，导光板210的两端架于底框上，减小导光板210的接触面积，提高导光板210的散热效果。
第一延伸件130设于垂直件120内并横向延伸以压持导光板210，第一延伸件130可以为方框状，也可以为分段间隔分布垂直件120上，具体地，请一并参阅图4，图4是图1中另一实施例的第一延伸件分布的俯视图，每一块垂直件120上至少间隔设置有两个以上的第一延伸件130，每一块导光板210相对的两端分别至少设置一个以上的第一延伸件130，优选地，每一块导光板210相对的两端分别设置一个第一延伸件130。
第二延伸件140设于垂直件120内并横向延伸以支撑扩散片310，第二延伸件140可以为方框状以支撑扩散片310的四周边缘，也可以为分段间隔地分布于垂直件120上。
进一步地，本发明的背框10还包括固定柱150，如图1和2所示，固定柱150与底板110连接并设于导光板210的至少一侧，以防止导光板210左右移动，当然也可以在导光板210的两侧均设置固定柱150。
本发明的导光板210还可以通过螺丝固定于底板110上，具体地，底板110与导光板210上匀设置通孔，螺丝依次穿过导光板210、底板110，通过螺母与螺丝配合以将导光板210锁于底板110上。
在其它实施例中，也可以不在导光板210上开孔，具体地，请一并参阅图5，图5是图2中另一实施例背框的底板与导光板连接的俯视图，螺丝包括螺丝盖51和螺丝钉（图未示），螺丝盖51的直径为螺丝钉的两倍以上，只需在底板110上间隔设置固定孔，相邻两个固定孔之间安装导光板210，由于螺丝盖51的直径为螺丝钉的两倍以上，即螺丝盖51具有一定大的面积可压持至导光板210的出光面213上，螺丝钉穿设于固定孔中并与螺母配合，从而将导光板210固定于底板110上。
请一并参阅图6，图6是图1中另一实施例的背框的底板与导光板连接的左视图，在其它实施例中，也可以不使用螺丝来固定导光板210，而是通过底板110上设置旋转扣部60，旋转扣部60包括压持段61和与压持段61连接的旋转段62，压持段61与旋转段62连接形成“7”字型，旋转段62旋转设于底板110上，压持段61将导光板210扣于底板110上，如上述第一延伸件的分布方式，本实施例中的每一块导光板210相对的两端分别至少设置一个以上的旋转扣部60，优选地，每一块导光板210相对的两端分别设置一个旋转扣部60。
上述简单地阐述了本发明的背光模组1的结构零部件，现简单介绍其光路，本发明的光路主要可分成四路，第一路为：LED 231的出射光激发量子管232产生激发光，激发光再依次进入导光板210、扩散板310、棱镜片330、增光片340、偏光片350等；第二路为：LED 231的出射光激发量子管232产生激发光，激发光再依次进入网点反射片40、扩散板310、棱镜片330、增光片340、偏光片350等；第三路为：LED 231的出射光激发量子管232产生激发光，激发光再依次进入导光板210、网点反射片40、扩散板310、棱镜片330、增光片340、偏光片350等；第四路为：LED 231的出射光激发量子管232产生出射光，出射光再依次进入导光板210、支撑件320、扩散板310、棱镜片330、增光片340、偏光片350等。
如图7所示，本发明还提供了一种液晶显示装置2，其包括上述的背光模组1。
本发明的液晶显示装置及其背光模组1至少具有如下优点：
（1）将现有技术中的大尺寸的背光单元设计成多个子背光单元200间隔拼接，减少了曲面大屏显示器中导光板210的弯曲难度；
（2）采用单块子背光单元间隔拼接形成大尺寸的背光单元，成本小，造成工艺简单，方便大规模量产；
（3）相邻子背光单元200之间的间隔处201可设置量子管232，无须制作超大尺寸的量子管232，方便量子管232在超大尺寸的显示器中的应用，即而提高背光的亮度和对比度；
（4）相邻子背光单元200之间的间隔处201的上方设有网点反射片40，降低间隔处201混合光的反射率，增强间隔处201混合光的散射率，以提高背光模组1出射光的均匀性。
需要指出的是，在本发明一实施例中提到的“第一”、“第二”“上”、“下”、“左”、“右”等用语仅是根据需要采用的文字符号，在实务中并不限于此，并且该文字符号可以互换使用。
以上所述仅为本发明的实施例，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 (18)

  1. 一种背光模组，其中，包括：
    背框；
    组合式背光单元，设于所述背框内的下部，所述组合式背光单元包括间隔拼接的多个子背光单元；
    光学组件，设于所述背框内的上部且间隔设于所述组合式背光单元的上方；及
    多个网点反射片，分别设于相邻所述子背光单元之间的间隔处的上方以降低相邻所述子背光单元之间的间隔处的光的反射率；其中，
    每一所述子背光单元包括：
    导光板，具有入光面和出光面，所述出光面具有微结构；
    电路板，设于所述导光板的一侧并支撑所述网点反射片；
    光源，贴设于所述电路板的侧面并向所述导光板的所述入光面提供入射光。
  2. 根据权利要求1所述的背光模组，其中，所述光源包括：
    LED，贴设于所述电路板的侧面；
    量子管，设于所述LED与所述导光板之间。
  3. 根据权利要求2所述的背光模组，其中，所述光学组件包括：
    扩散片，间隔设于所述组合式背光单元上方；
    支撑件，一端设于所述导光板上，另一端抵接至所述扩散片以支撑所述扩散片。
  4. 根据权利要求3所述的背光模组，其中，所述支撑件的高度为5-15mm，所述支撑件的底面直径为2mm-4mm。
  5. 根据权利要求3所述的背光模组，其中，所述支撑件的宽度由下至上逐渐减小或由中间往两端逐渐减小。
  6. 根据权利要求3所述的背光模组，其中，所述背框包括：
    底板，支撑所述组合式背光单元；
    两个垂直件，分别垂直设于所述底板相对的两侧；
    第一延伸件，设于所述垂直件内并横向延伸以压持所述导光板；及，
    第二延伸件，设于所述垂直件内并横向延伸以支撑所述扩散片。
  7. 根据权利要求6所述的背光模组，其中，所述背框还包括固定柱，所述固定柱与所述底板连接并设于所述导光板的至少一侧。
  8. 根据权利要求6所述的背光模组，其中，所述背框还包括固定所述导光板的旋转扣部，所述旋转扣部包括：
    旋转段，旋转设于所述底板上；
    压持段，与所述旋转段连接并将所述导光板扣于所述底板上。
  9. 一种背光模组，其中，包括：
    背框；
    组合式背光单元，设于所述背框内的下部，所述组合式背光单元包括间隔拼接的多个子背光单元；
    光学组件，设于所述背框内的上部且间隔设于所述组合式背光单元的上方；及
    多个网点反射片，分别设于相邻所述子背光单元之间的间隔处的上方以降低相邻所述子背光单元之间的间隔处的光的反射率。
  10. 根据权利要求9所述的背光模组，其中，每一所述子背光单元包括：
    导光板；
    电路板，设于所述导光板的一侧并支撑所述网点反射片；
    光源，贴设于所述电路板的侧面并向所述导光板提供入射光。
  11. 根据权利要求10所述的背光模组，其中，所述光源包括：
    LED，贴设于所述电路板的侧面；
    量子管，设于所述LED与所述导光板之间。
  12. 根据权利要求11所述的背光模组，其中，所述LED为蓝光LED。
  13. 根据权利要求10所述的背光模组，其中，所述光学组件包括：
    扩散片，间隔设于所述组合式背光单元上方；
    支撑件，一端设于所述导光板上，另一端抵接至所述扩散片以支撑所述扩散片。
  14. 根据权利要求13所述的背光模组，其中，所述支撑件的高度为5-15mm。
  15. 根据权利要求14所述的背光模组，其中，所述支撑件的宽度由下至上逐渐减小或由中间往两端逐渐减小。
  16. 根据权利要求13所述的背光模组，其中，所述光学组件还包括依次间隔设于所述扩散片上方的棱镜片、增光片以及偏光片。
  17. 根据权利要求13所述的背光模组，其中，所述背框包括：
    底板，支撑所述组合式背光单元；
    两个垂直件，分别垂直设于所述底板相对的两侧；
    第一延伸件，设于所述垂直件内并横向延伸以压持所述导光板；及，
    第二延伸件，设于所述垂直件内并横向延伸以支撑所述扩散片。
  18. 一种液晶显示装置，其中，包括权利要求9-17任意一项所述的背光模组。
PCT/CN2015/090128 2015-08-18 2015-09-21 液晶显示装置及其背光模组 Ceased WO2017028358A1 (zh)

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US20170254949A1 (en) 2017-09-07
CN105158969A (zh) 2015-12-16
CN105158969B (zh) 2018-07-17

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