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WO2019095421A1 - 液晶显示器及其背光模组 - Google Patents

液晶显示器及其背光模组 Download PDF

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Publication number
WO2019095421A1
WO2019095421A1 PCT/CN2017/112697 CN2017112697W WO2019095421A1 WO 2019095421 A1 WO2019095421 A1 WO 2019095421A1 CN 2017112697 W CN2017112697 W CN 2017112697W WO 2019095421 A1 WO2019095421 A1 WO 2019095421A1
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WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
horizontal portion
light
disposed
Prior art date
Application number
PCT/CN2017/112697
Other languages
English (en)
French (fr)
Inventor
韩梅
周革革
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 US15/735,030 priority Critical patent/US10690838B2/en
Publication of WO2019095421A1 publication Critical patent/WO2019095421A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02B6/0073—Light emitting diode [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • G02F1/133604—Direct backlight with lamps
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0274—Optical details, e.g. printed circuits comprising integral optical means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/189—Printed circuits structurally associated with non-printed electric components characterised by the use of a flexible or folded printed circuit
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/05—Flexible printed circuits [FPCs]
    • H05K2201/056—Folded around rigid support or component
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10106—Light emitting diode [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10128—Display

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a liquid crystal display and a backlight module thereof.
  • the full screen will become the standard of the mini machine, that is, the phone frame is getting narrower and narrower, which requires the upper and lower left and right borders of the display module to be extremely narrow; because the lower frame (ie, the LED side) requires a certain light introduction distance, The difficulty of narrowing the lower frame is increased, and the conventional lower frame is about 5 mm.
  • the area of the FPC of the light source is larger and larger, so that more LEDs are arranged, and the FPC of the light source is generally disposed at the top of the light guide plate. Therefore, the width of the FPC becomes a bottleneck for narrowing the lower frame. .
  • the present invention provides a liquid crystal display and a backlight module thereof, which can reduce the frame of the liquid crystal display and realize the narrow bezel design of the liquid crystal display.
  • the specific technical solution provided by the present invention is: providing a backlight module, the backlight module comprising an outer frame, a light source, a light guide plate, a reflective layer and an optical film set, wherein the outer frame comprises a side plate, the side plate Opposite the light incident surface of the light guide plate, the light source includes a flexible circuit board and an LED, the flexible circuit board includes a vertical portion and a first horizontal portion, and the vertical portion is disposed on the side plate and the guide Between the light incident surfaces of the light plate, the LED is disposed on a side of the vertical portion facing the light guide plate, and the first horizontal portion is bent and extended from the vertical portion toward the light guide plate, the reflective layer The optical film is disposed at a bottom of the light guide plate, and the optical film is disposed at a top of the light guide plate.
  • the first horizontal portion extends to the top of the light guide plate.
  • the first horizontal portion is perpendicular to the vertical portion.
  • the first horizontal portion is coated with a reflective material toward one side of the light guide plate.
  • the backlight module further includes a glue layer disposed between the side plate and the vertical portion.
  • the outer frame further includes a bottom plate that is bent and extended from the side plate toward the light guide plate
  • the flexible circuit board further includes a first portion that is bent and extended from the vertical portion toward the light guide plate.
  • the second horizontal portion and the first horizontal portion are respectively located at two sides of the light guide plate.
  • the second horizontal portion extends to the bottom of the light guide plate.
  • the second horizontal portion is coated with a reflective material toward one side of the light guide plate.
  • the bottom plate includes a connecting portion and a step portion bent from the connecting portion toward the light guide plate, and the connecting portion has a length greater than a length of the second horizontal portion.
  • the present invention also provides a liquid crystal display comprising the backlight module as described above.
  • the light source of the backlight module of the present invention comprises a flexible circuit board and an LED, the flexible circuit board comprising a vertical portion and a first horizontal portion, wherein the vertical portion is disposed on the light incident surface of the side plate and the light guide plate
  • the LED is disposed on a side of the vertical portion facing the light guide plate, and the first horizontal portion is bent and extended from the vertical portion toward the light guide plate, by setting the flexible circuit board as a vertical portion and
  • the first horizontal portion has two parts, so that the liquid crystal display frame can be widened due to the length of the first horizontal portion being too long, and the narrow bezel design of the liquid crystal display is realized.
  • FIG. 1 is a schematic structural view of a liquid crystal display device of Embodiment 1;
  • FIG. 2 is a schematic structural view of a liquid crystal display device of Embodiment 2.
  • the liquid crystal display provided by the embodiment includes a backlight module 1 and a display module 2 .
  • the display module 2 is located at the top of the backlight module 1 , and the backlight module 1 is used to provide a light source for the display module 2 .
  • the backlight module 1 includes an outer frame 11, a light source 12, a light guide plate 13, a reflective layer 14, and an optical film group 15.
  • the outer frame 11 includes a side plate 11a, and the side plate 11a is disposed opposite to the light incident surface 13a of the light guide plate 13.
  • the light source 12 includes a flexible circuit board 12a including a vertical portion 10 and a first horizontal portion 20, and a vertical portion 10 disposed between the side plate 11a and the light incident surface 13a of the light guide plate 13, and the LED 12b is disposed at a vertical portion 10, the first horizontal portion 20 is bent and extended toward the light guide plate 13 by the vertical portion 10, the reflective layer 14 is disposed at the bottom of the light guide plate 13, and the optical film group 15 is disposed at the top of the light guide plate 13.
  • the light incident surface 13a of the light guide plate 13 refers to the side of the light guide plate 13 facing the LED 12b.
  • the side plate 11a is for fixing the vertical portion 10, and the LED 12b is electrically connected to the vertical portion 10.
  • the light emitted from the LED 12b is incident on the light guide plate 13 and is reflected by the light guide plate 13 multiple times, and then exits from the light exit surface of the light guide plate 13.
  • the light exit surface of the light guide plate 13 refers to the light guide plate 13 opposite to the optical film group 15. one side.
  • Light emitted from the light-emitting surface of the light guide plate 13 is incident on the optical film group 15.
  • the light incident on the bottom of the light guide plate 13 is reflected by the reflective layer 147 into the light guide plate 13 to prevent light from exiting from the bottom of the light guide plate 13.
  • the first horizontal portion 20 extends to the top of the light guide plate 13.
  • the first horizontal portion 20 is perpendicular to the vertical portion 10, and the first horizontal portion 20 overlaps the top edge of the light guide plate 13, so that no additional arrangement of the light shielding glue is required.
  • the flexible circuit board 12a is disposed as two parts of the vertical portion 10 and the first horizontal portion 20, so that the liquid crystal display frame can be prevented from widening due to the length of the first horizontal portion 20 being too long.
  • the first horizontal portion 20 is coated with a reflective material toward one side of the light guide plate 13, and the reflective material may be white oil and other high reflectivity materials.
  • the reflective material may be white oil and other high reflectivity materials.
  • the backlight module in this embodiment further includes a glue layer 16 disposed between the side plate 11a and the vertical portion 10, and the vertical portion 10 can be fixed on the side plate 11a through the glue layer 16.
  • the optical film group 15 includes a lower diffusion sheet 15a, a light enhancement sheet 15b, and an upper diffusion sheet 15c which are disposed in this order from the bottom to the top.
  • the upper diffusion sheet 15c is located between the brightness enhancement sheet 15b and the display module 2
  • the lower diffusion sheet 15a is located between the brightness enhancement sheet 15b and the light guide plate 13.
  • the lower diffusion sheet 15a is for collecting the light emitted from the light-emitting surface 13a of the light guide plate 13 and uniformly projecting it onto the brightness enhancement sheet 15b
  • the brightness enhancement sheet 15b is for dispersing the lower diffusion sheet 15a.
  • the light is collected to increase the brightness
  • the upper diffusion sheet 15c is for atomizing the light emitted from the brightness enhancement sheet 15b, and uniformly emits the light.
  • the outer frame 11 in this embodiment further includes a bottom plate 11b which is bent and extended from the side plate 11a toward the light guide plate 13.
  • the bottom plate 11b is used for supporting the entire backlight module 1.
  • the reflective layer 14 in this embodiment may be a reflective sheet or a reflective coating applied to the bottom of the light guide plate 13.
  • the reflective layer 14 is a reflective sheet, it extends to the bottom of the LED 12b so that light emitted from the bottom of the LED 12b can be reflected into the light guide plate 13.
  • the LED 12b is composed of a light-emitting chip and a transparent lamp cover, and the transparent lamp cover encapsulates the light-emitting chip.
  • the light emitting chip may be a white light chip, that is, the light emitting chip emits white light.
  • the light emitting chip may also be a blue light chip, that is, the light emitting chip emits blue light.
  • the LED 12b further includes a fluorescent material coated on the inner surface of the transparent cover, and the fluorescent material may be a yellow phosphor, a mixture of red and green. Phosphors and yellow and red mixed phosphors.
  • the blue light emitted by the blue chip excites the fluorescent material such that the light emerging from the transparent cover is white.
  • the present embodiment is different from the first embodiment in that the flexible circuit board 12a further includes a second horizontal portion 30 which is bent and extended from the vertical portion 10 toward the light guide plate 13.
  • the second horizontal portion 30 and the first horizontal portion 20 are respectively located on both sides of the light guide plate 13 .
  • the second horizontal portion 30 is parallel to the first horizontal portion 20, and the second horizontal portion 30 extends to the bottom of the light guide plate 13.
  • the second horizontal portion 30 overlaps the bottom edge of the light guide plate 13, so that no additional light shielding layer is required and the reflective layer 14 does not need to be extended to the bottom of the LED 12b.
  • the flexible circuit board 12a is disposed in three parts of the vertical portion 10, the first horizontal portion 20, and the second horizontal portion 30, so that the liquid crystal display frame can be further widened due to the length of the first horizontal portion 20 being too long.
  • the second horizontal portion 30 is coated with a reflective material on one side of the light guide plate 13, and the reflective material may be white oil and other high reflectivity materials.
  • the reflective material may be white oil and other high reflectivity materials.
  • the bottom plate 11b includes a connecting portion 100 and a step portion 101 which is bent and extended from the connecting portion 100 toward the light guide plate 13.
  • the length of the connecting portion 100 is greater than the length of the second horizontal portion 30.
  • the reflective layer 14 can be supported by the step portion 101 while reducing the thickness of the liquid crystal display.
  • the vertical portion 10, the first horizontal portion 20, and the second horizontal portion 30 are all single-layer FPCs.

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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)
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Abstract

一种液晶显示器及背光模组（1），背光模组（1）包括外框（11）、光源（12）、导光板（13）、反射层（14）及光学膜片组（15），外框（11）包括侧板（11a），侧板（11a）与导光板（13）的入光面（13a）相对设置，光源（12）包括柔性电路板（12a）和LED（12b），柔性电路板（12a）包括垂直部（10）和第一水平部（20），垂直部（10）设于侧板（11a）与导光板（13）的入光面（13a）之间，LED（12b）设于垂直部（10）朝向导光板（13）的一面，第一水平部（20）由垂直部（10）朝向导光板（13）弯折延伸得到，反射层（14）设于导光板（13）的底部，光学膜片组（15）设于导光板（13）的顶部。通过将柔性电路板（12a）设置为垂直部（10）和第一水平部（20）两部分，从而可以避免因第一水平部（20）长度过长而导致液晶显示器边框变宽，实现液晶显示器的窄边框设计。

Description

液晶显示器及其背光模组 技术领域
本发明涉及液晶显示技术领域，尤其涉及一种液晶显示器及其背光模组。
背景技术
目前，全面屏将成为旗舰机的标配，即手机边框越来越窄，这就要求显示模组的上下左右边框都极窄；因为下边框(即LED灯侧)需一定的光导入距离，使得下边框做窄难度增加，常规的下边框约为5mm左右。随着光源的要求更高，光源的FPC的面积越来越大，以便于设置更多的LED，光源的FPC一般设置在导光板的顶部，因此，FPC的宽度成为限制下边框做窄的瓶颈。
发明内容
为了解决现有技术的不足，本发明提供一种液晶显示器及其背光模组，能够缩小液晶显示器的边框，实现液晶显示器的窄边框设计。
本发明提出的具体技术方案为：提供一种背光模组，所述背光模组包括外框、光源、导光板、反射层及光学膜片组，所述外框包括侧板，所述侧板与所述导光板的入光面相对设置，所述光源包括柔性电路板和LED，所述柔性电路板包括垂直部和第一水平部，所述垂直部设于所述侧板与所述导光板的入光面之间，所述LED设于所述垂直部朝向所述导光板的一面，所述第一水平部由所述垂直部朝向所述导光板弯折延伸得到，所述反射层设于所述导光板的底部，所述光学膜片组设于所述导光板的顶部。
可选地，所述第一水平部延伸至所述导光板的顶部。
可选地，所述第一水平部与所述垂直部垂直。
可选地，所述第一水平部朝向所述导光板的一面涂覆有反射材料。
可选地，所述背光模组还包括设于所述侧板与所述垂直部之间的胶层。
可选地，所述外框还包括由所述侧板朝向所述导光板弯折延伸出的底板，所述柔性电路板还包括由所述垂直部朝向所述导光板弯折延伸出的第二水平部，所述第二水平部与所述第一水平部分别位于所述导光板的两侧。
可选地，所述第二水平部延伸至所述导光板的底部。
可选地，所述第二水平部朝向所述导光板的一面涂覆有反射材料。
可选地，所述底板包括连接部及由所述连接部朝向所述导光板弯折延伸出的台阶部，所述连接部的长度大于所述第二水平部的长度。
本发明还提供了一种液晶显示器，所述液晶显示器包括如上所述的背光模组。
本发明提出的背光模组的光源包括柔性电路板和LED，所述柔性电路板包括垂直部和第一水平部，所述垂直部设于所述侧板与所述导光板的入光面之间，所述LED设于所述垂直部朝向所述导光板的一面，所述第一水平部由所述垂直部朝向所述导光板弯折延伸得到，通过将柔性电路板设置为垂直部和第一水平部两部分，从而可以避免因第一水平部长度过长而导致液晶显示器边框变宽，实现液晶显示器的窄边框设计。
附图说明
图1为实施例1的液晶显示器的结构示意图；
图2为实施例2的液晶显示器的结构示意图。
具体实施方式
以下，将参照附图来详细描述本发明的实施例。然而，可以以许多不同的形式来实施本发明，并且本发明不应该被解释为限制于这里阐述的具体实施例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。在附图中，相同的标号将始终被用于表示相同的元件。
实施例1
参照图1，本实施例提供的液晶显示器包括背光模组1和显示模组2，显示模组2位于背光模组1的顶部，背光模组1用于为显示模组2提供光源。
背光模组1包括外框11、光源12、导光板13、反射层14及光学膜片组15，外框11包括侧板11a，侧板11a与导光板13的入光面13a相对设置。光源12包括柔性电路板12a和LED12b，柔性电路板12a包括垂直部10和第一水平部20，垂直部10设于侧板11a与导光板13的入光面13a之间，LED12b设于垂直部10朝向导光板13的一面，第一水平部20由垂直部10朝向导光板13弯折延伸得到，反射层14设于导光板13的底部，光学膜片组15设于导光板13的顶部。这里，导光板13的入光面13a指的是导光板13朝向LED12b的一面。
侧板11a用于固定垂直部10，LED12b与垂直部10电性连接。LED12b发出的光入射至导光板13中并经导光板13多次反射后从导光板13的出光面出射，这里，导光板13的出光面指的是导光板13与光学膜片组15相对的一面。从导光板13的出光面出射的光入射至光学膜片组15中。其中，入射至导光板13的底部的光线被反射层147反射至导光板13中，从而避免光线从导光板13的底部出射。
第一水平部20延伸至导光板13的顶部，较佳地，第一水平部20与垂直部10垂直，第一水平部20与导光板13的顶部边缘重叠，从而不需要额外的设置遮光胶层，同时，将柔性电路板12a设置为垂直部10和第一水平部20两部分，从而可以避免因第一水平部20长度过长而导致液晶显示器边框变宽。
为了提升光源12的利用率，第一水平部20朝向导光板13的一面涂覆有反射材料，反射材料可以为白油以及其他高反射率材料。LED12b发出的光入射至第一水平部20上面时被反射材料反射进导光板13中，从而避免光线从LED的顶部泄露出去。
本实施例中的背光模组还包括设于侧板11a与垂直部10之间的胶层16，通过胶层16可以将垂直部10固定在侧板11a上。
光学膜片组15包括从下而上依次设置的下扩散片15a、增光片15b、上扩散片15c。上扩散片15c位于增光片15b和显示模组2之间，下扩散片15a位于增光片15b和导光板13之间。下扩散片15a用于将从导光板13的出光面13a发出的光集中起来均匀投射到增光片15b上，增光片15b用于将下扩散片15a发出的分散 光进行聚集，以提高亮度，上扩散片15c用于对从增光片15b发出的光进行雾化,并将光均匀射出。
本实施例中的外框11还包括由侧板11a朝向导光板13弯折延伸出的底板11b，底板11b用于对整个背光模组1进行支撑。
本实施例中的反射层14可以是反射片也可以是涂覆于导光板13的底部的反射涂层。反射层14为反射片时，其延伸至LED12b的底部，从而可以将从LED12b底部出射的光线反射至导光板13中。
LED12b由发光芯片和透明灯罩组成，透明灯罩对发光芯片进行封装。其中，发光芯片可以是白光芯片即发光芯片发出的是白光。发光芯片也可以是蓝光芯片即发光芯片发出的是蓝光，在发光芯片为蓝光芯片时，LED12b还包括涂覆于透明罩内表面的荧光材料，荧光材料可以为黄色的荧光粉、红色和绿色混合的荧光粉以及黄色和红色混合的荧光粉。蓝光芯片发出的蓝光激发荧光材料，从而使得从透明灯罩中出射的光为白光。
实施例2
本实施例与实施例1的不同之处在于柔性电路板12a还包括由垂直部10朝向导光板13弯折延伸出的第二水平部30。
第二水平部30与第一水平部20分别位于导光板13的两侧。较佳地，第二水平部30与第一水平部20平行，第二水平部30延伸至导光板13的底部。第二水平部30与导光板13的底部边缘重叠，从而不需要额外的设置遮光胶层以及不需要将反射层14延伸至LED12b的底部。将柔性电路板12a设置为垂直部10、第一水平部20和第二水平部30三部分，从而可以进一步避免因第一水平部20长度过长而导致液晶显示器边框变宽。
为了进一步提升光源12的利用率，第二水平部30朝向导光板13的一面涂覆有反射材料，反射材料可以为白油以及其他高反射率材料。LED12b发出的光入射至第二水平部30上面时被反射材料反射进导光板13中，从而避免光线从LED的顶部泄露出去。
本实施例中底板11b包括连接部100及由连接部100朝向导光板13弯折延伸出的台阶部101，连接部100的长度大于第二水平部30的长度。通过台阶部101可以支撑反射层14同时减少液晶显示器的厚度。
本实施例中垂直部10、第一水平部20及第二水平部30都是单层FPC。
以上所述仅是本申请的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。

Claims (18)

  1. 一种背光模组，其中，包括外框、光源、导光板、反射层及光学膜片组，所述外框包括侧板，所述侧板与所述导光板的入光面相对设置，所述光源包括柔性电路板和LED，所述柔性电路板包括垂直部和第一水平部，所述垂直部设于所述侧板与所述导光板的入光面之间，所述LED设于所述垂直部朝向所述导光板的一面，所述第一水平部由所述垂直部朝向所述导光板弯折延伸得到，所述反射层设于所述导光板的底部，所述光学膜片组设于所述导光板的顶部。
  2. 根据权利要求1所述的背光模组，其中，所述第一水平部延伸至所述导光板的顶部。
  3. 根据权利要求2所述的背光模组，其中，所述第一水平部与所述垂直部垂直。
  4. 根据权利要求2所述的背光模组，其中，所述第一水平部朝向所述导光板的一面涂覆有反射材料。
  5. 根据权利要求1所述的背光模组，其中，还包括设于所述侧板与所述垂直部之间的胶层。
  6. 根据权利要求1所述的背光模组，其中，所述外框还包括由所述侧板朝向所述导光板弯折延伸出的底板，所述柔性电路板还包括由所述垂直部朝向所述导光板弯折延伸出的第二水平部，所述第二水平部与所述第一水平部分别位于所述导光板的两侧。
  7. 根据权利要求6所述的背光模组，其中，所述第二水平部延伸至所述导光板的底部。
  8. 根据权利要求7所述的背光模组，其中，所述第二水平部朝向所述导光板的一面涂覆有反射材料。
  9. 根据权利要求6所述的背光模组，其中，所述底板包括连接部及由所述连接部朝向所述导光板弯折延伸出的台阶部，所述连接部的长度大于所述第二水平部的长度。
  10. 一种液晶显示器，其中，包括背光模组，所述背光模组包括外框、光源、导光板、反射层及光学膜片组，所述外框包括侧板，所述侧板与所述导光板的入光面相对设置，所述光源包括柔性电路板和LED，所述柔性电路板包括垂直部和第一水平部，所述垂直部设于所述侧板与所述导光板的入光面之间，所述LED设于所述垂直部朝向所述导光板的一面，所述第一水平部由所述垂直部朝向所述导光板弯折延伸得到，所述反射层设于所述导光板的底部，所述光学膜片组设于所述导光板的顶部。
  11. 根据权利要求10所述的液晶显示器，其中，所述第一水平部延伸至所述导光板的顶部。
  12. 根据权利要求11所述的液晶显示器，其中，所述第一水平部与所述垂直部垂直。
  13. 根据权利要求11所述的液晶显示器，其中，所述第一水平部朝向所述导光板的一面涂覆有反射材料。
  14. 根据权利要求10所述的液晶显示器，其中，还包括设于所述侧板与所述垂直部之间的胶层。
  15. 根据权利要求10所述的液晶显示器，其中，所述外框还包括由所述侧板朝向所述导光板弯折延伸出的底板，所述柔性电路板还包括由所述垂直部朝向所述导光板弯折延伸出的第二水平部，所述第二水平部与所述第一水平部分别位于所述导光板的两侧。
  16. 根据权利要求15所述的液晶显示器，其中，所述第二水平部延伸至所述导光板的底部。
  17. 根据权利要求16所述的液晶显示器，其中，所述第二水平部朝向所述导光板的一面涂覆有反射材料。
  18. 根据权利要求15所述的液晶显示器，其中，所述底板包括连接部及由所述连接部朝向所述导光板弯折延伸出的台阶部，所述连接部的长度大于所述第二水平部的长度。
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