US20140009718A1 - Backlight unit and liquid crystal display having the same - Google Patents
Backlight unit and liquid crystal display having the same Download PDFInfo
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- US20140009718A1 US20140009718A1 US14/021,342 US201314021342A US2014009718A1 US 20140009718 A1 US20140009718 A1 US 20140009718A1 US 201314021342 A US201314021342 A US 201314021342A US 2014009718 A1 US2014009718 A1 US 2014009718A1
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- United States
- Prior art keywords
- guide plate
- light guide
- liquid crystal
- light
- crystal display
- 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.)
- Abandoned
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- 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
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
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- 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
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- 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
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- 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
- G02B6/0051—Diffusing sheet or layer
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- 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
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
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- 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]
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- 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
- G02B6/0085—Means for removing heat created by the light source from the package
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
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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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/13332—Front frames
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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
- G02F1/133601—Illuminating devices for spatial active dimming
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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
- G02F1/133628—Illuminating devices with cooling means
Abstract
A liquid crystal display is provided. The liquid crystal display includes a liquid crystal panel, a light guide plate disposed below the liquid crystal panel, and a light source unit which emits light to at least one side surface of the light guide plate. The light source unit includes light source elements which are disposed adjacent to the at least one side surface of the light guide plate, and which emit light that is incident on the at least one side surface of the light guide plate. A printed circuit board is disposed adjacent to a lower surface of the light guide plate and supports the light source elements.
Description
- This application is a continuation application of U.S. application Ser. No. 13/224,926, filed Sep. 2, 2011, which claims priority from Korean Patent Application No. 10-2010-0092592, filed on Sep. 20, 2010 in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference.
- 1. Field
- Apparatuses consistent with exemplary embodiments relate to a liquid crystal display in which a backlight unit has an improved configuration.
- 2. Description of the Related Art
- A liquid crystal display is an electric device that converts and transmits electric signals, supplied from a variety of devices, into visual information using variations in the transmissivity of liquid crystals based on the application of voltage. As a representative example, there is widely used a flat panel display, which exhibits low power consumption and is convenient to carry, although it is not self-illuminating, thus requiring a separate light source.
- A liquid crystal display may need a backlight unit to provide light to the liquid crystal panel, which used to form the image. The backlight unit includes a lamp serving as a light source, optical members, such as a reflecting sheet, a light guide plate, a diffusing sheet, a prism sheet, and a protective sheet, and other structural members, such as a mold frame, although the listed elements may be changed according to the size and function of the backlight unit. Other examples of a light source include a Cold Cathode Fluorescent Lamp (CCFL), an External Electrode Fluorescent Lamp (EEFL), and a Light Emitting Diode (LED).
- One or more embodiments provide a liquid crystal display in which a backlight unit has an improved configuration to realize a super narrow bezel design.
- One or more embodiments also provide a liquid crystal display is provided in which a backlight unit has an improved configuration to improve local dimming performance.
- In accordance with an aspect of an exemplary embodiment, there is provided a liquid crystal display including a liquid crystal panel, a light source unit which emits light, a light guide plate comprising a least one side surface through which receives light from the light source unit, wherein the light guide plate emits light to the liquid crystal panel, wherein the light source unit includes a plurality of light source elements which emit light and which are disposed adjacent to the at least one side surface of the light guide plate, and a printed circuit board which supports the light source units and is disposed adjacent to a lower surface of the light guide plate.
- The liquid crystal display may further include a lower cover including a bottom portion which supports the light guide plate, and the printed circuit board may be disposed between the light guide plate and the bottom portion.
- The liquid crystal display may further include an upper cover including a bezel portion which covers a rim of the liquid crystal panel, and an inner edge of the bezel portion may be at a position substantially corresponding to an outer edge of the light guide plate.
- A width of the bezel portion may be about 3 to 10 mm.
- The light guide plate may be comprise an upper surface comprising a plurality of ridges which are one of prism-shaped and lens-shaped.
- The liquid crystal display may further include a prism sheet disposed between the liquid crystal panel and the light guide plate, and the prism sheet may include a plurality of prism-shaped ridges which extent in a direction which coincides with a direction in which the ridges of the light guide plate extend.
- Light that is emitted from the light source elements may be emitted in a direction that substantially coincides with the direction in which the ridges of the light guide plate extend.
- Light that is emitted from the light source elements may be emitted in a direction that substantially coincides with the direction in which the ridges of the prism sheet extend.
- The liquid crystal display may further include a diffusing plate which is disposed above the light guide plate and which optically mixes the light incident thereon.
- The liquid crystal display may further include a plurality of optical sheets stacked on the light guide plate, and the diffusing plate may be provided between a first optical sheet of the plurality of optical sheets and a second optical sheet of the plurality of optical sheets.
- The printed circuit board may be made of a metal and may transfer heat, generated by the light source elements, to a bottom portion of a lower cover.
- The liquid crystal display may further include a cover assembly which supports the liquid crystal panel and the light guide plate, and the cover assembly may include an upper cover and a lower cover which define an external portion of the cover assembly, and an intermediate supporting member disposed between the upper cover and the lower cover which supports the light guide plate.
- The intermediate supporting member may include a body and a press portion, and the press portion may be disposed between the liquid crystal panel and the light guide plate and may protrude inward from a position corresponding to an outer edge of the light guide plate.
- A width of the press portion protruding inward from the edge of the light guide plate may be about 2 to 3 mm.
- The body of the intermediate supporting member may contact the light source elements and may transfer heat, generated by the light source elements, to an outer surface of the intermediate supporting member.
- The liquid crystal display may further include a plurality of optical sheets disposed between the liquid crystal panel and the light guide plate.
- The liquid crystal display may further include a reflecting sheet disposed below the light guide plate.
- In accordance with an aspect of another embodiment, a backlight unit is provided that includes a light guide plate, a plurality of light source elements which emit light and which are arranged to face at least one side surface of the light guide plate, and a printed circuit board which supports the plurality of light source elements and which is arranged to face a lower surface of the light guide plate.
- In accordance with an aspect of another exemplary embodiment, there is provided a liquid crystal display including a liquid crystal panel, a plurality of optical sheets disposed below the liquid crystal panel, a light guide plate disposed below the optical sheets, a reflecting sheet disposed below the light guide plate, a light source unit which emits light to at least one side surface of the light guide plate, and a cover assembly which supports the liquid crystal panel, optical sheets, light guide plate, reflecting sheet and light source unit, wherein the light source unit includes a plurality of light source elements disposed between a sidewall of the cover assembly and the at least one side surface of the light guide plate, wherein the plurality of light source elements emit light to the at least one side surface of the light guide plate, and a printed circuit board which supports the plurality of light source elements and which is disposed between a bottom portion of the cover assembly and a lower surface of the light guide plate.
- The light guide plate may comprise an upper surface comprising a plurality of ridges which are one of prism-shaped and lens-shaped.
- The optical sheets may include a prism sheet comprising a plurality of prism-shaped ridges which extend in a direction which is the same as a direction in which the ridges of the light guide plate extend.
- The liquid crystal display may further include a diffusing plate disposed above the light guide plate, wherein the diffusing plate optically mixes light incident thereon.
- The cover assembly may include a bezel portion which covers a rim of the liquid crystal panel, wherein an inner edge of the bezel portion may be provided at a position substantially corresponding to an outer edge of the light guide plate.
- The cover assembly may include a press portion disposed between the liquid crystal panel and the optical sheets, and the press portion may protrude inward from an outer edge of the optical sheets.
- These and/or other aspects will become apparent and more readily appreciated from the following description of exemplary embodiments, taken in conjunction with the accompanying drawings in which:
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FIG. 1 is a perspective view of an assembled liquid crystal display according to an e exemplary embodiment; -
FIG. 2 is an exploded perspective view of the liquid crystal display ofFIG. 1 ; -
FIG. 3 is a sectional view taken along the line A-A ofFIG. 1 -
FIG. 4 is a diagrammatic view of a backlight unit including a prismatic light guide plate according to an exemplary embodiment; -
FIG. 5 is a diagrammatic view of a backlight unit including a lens light guide plate according to another exemplary embodiment; -
FIG. 6 is a diagrammatic view illustrating a light propagation path in the liquid crystal display ofFIG. 1 ; -
FIG. 7 is a diagrammatic view illustrating a light propagation path in the liquid crystal display ofFIG. 1 ; -
FIG. 8 is an exploded perspective view of a liquid crystal display according to another embodiment; -
FIG. 9 is a sectional view of the liquid crystal display ofFIG. 8 ; -
FIG. 10 is a diagrammatic view illustrating a light propagation path in the liquid crystal display ofFIGS. 8 ; and -
FIG. 11 is a diagrammatic view illustrating a light propagation path in the liquid crystal display ofFIG. 8 . - Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
- Hereinafter, a liquid crystal display according to embodiments will be described in detail with reference to the accompanying drawings.
-
FIG. 1 is an assembly perspective view of an assembled liquid crystal display according to an embodiment,FIG. 2 is an exploded perspective view of the liquid crystal display ofFIG. 1 ,FIG. 3 is a sectional view taken along the line A-A ofFIG. 1 ,FIG. 4 is a diagrammatic view of a backlight unit including a prismatic light guide plate according to an embodiment, andFIG. 5 is a diagrammatic view of a backlight unit including a lens light guide plate according to another embodiment. - As illustrated in
FIGS. 1 to 5 , theliquid crystal display 10 may include aliquid crystal panel 20, abacklight unit 30, and acover assembly 80 surrounding the aforementioned components. - The
liquid crystal panel 20 may function as a display unit of theliquid crystal display 10. According to a related art configuration of theliquid crystal panel 20, liquid crystals are charged in a narrow gap between two thin glass substrates and voltage is applied to the liquid crystals via a transparent electrode to change the alignment direction of liquid crystal molecules so as to selectively transmit or reflect light, thereby enabling the formation of an image. - The
backlight unit 30 may be disposed below theliquid crystal panel 20 to provide theliquid crystal panel 20 with light. Thebacklight unit 30 may include alight guide plate 40, alight source unit 50,optical sheets 60, and a reflectingsheet 70. - The
light guide plate 40 may be made of acryl-based resin, and may have an approximately hexahedral shape. - The
light guide plate 40 may be provided with various patterns at alower surface 43 thereof. The patterns of thelight guide plate 40 serve to disturb the total internal reflection of light introduced into thelight guide plate 40, thus assuring a more uniform emission of the light from anupper surface 42 of thelight guide plate 40. The light emitted from theupper surface 42 of thelight guide plate 40 may define a surface light source. - The
upper surface 42 of thelight guide plate 40 may be provided with ridgelines in the form of prisms or lenses. The prism-shaped or lens-shaped ridgelines may extend lengthwise in a horizontal direction or a vertical direction of thelight guide plate 40. More specifically, the prism-shaped or lens-shaped ridgelines may be formed at theupper surface 42 of thelight guide plate 40 so as to extend lengthwise in a horizontal direction of thelight guide plate 40 in a case in which light is introduced into thelight guide plate 40 through one or both of the left and right side surfaces 41 a and 41 b, or so as to extend lengthwise in a vertical direction of the light guide plate in a case in which light is introduced into the light guide plate through one or both of the upper and lower side surfaces 41 c and 41 d of thelight guide plate 40.FIG. 2 illustrates the prism-shaped or lens-shaped ridgelines extending in the horizontal direction of thelight guide plate 40. - The
light source unit 50 may supply light to one or more of the side surfaces 41 a, 41 b, 41 c and 41 d of thelight guide plate 40. Thelight source unit 50 may includelight source elements 51 which emit light and a printedcircuit board 52 that supports thelight source elements 51. - The
light source elements 51 may be arranged close to at least one of the side surfaces 41 a to 41 d of thelight guide plate 40. Specifically, thelight source elements 51 may be arranged to face at least one of the side surfaces 41 a to 41 d of thelight guide plate 40, so as to directly introduce light into thelight guide plate 40 through the at least one side surface. - Each of the
light source elements 51 may include a light emitting diode (LED) emitting red, green, or blue light. Thelight source elements 51 may constitute a plurality of blocks, each of which includes a combination of LEDs emitting red, green and blue light. Thelight source elements 51 divided into the plurality of blocks may be controlled to enable local dimming or partial image control technologies. - The
light source elements 51 may be fixed to the printedcircuit board 52 via brazing. - The printed
circuit board 52 may be disposed close to thelower surface 43 of thelight guide plate 40. More specifically, the printedcircuit board 52 may be disposed between thelight guide plate 40 and alower cover 82. The printedcircuit board 52 may be made of plastics or metals. In particular, if the printedcircuit board 52 is made of a metal, such as aluminum, it may be possible to enhance the thermal conductivity of the printedcircuit board 52. In this case, the metallic printedcircuit board 52 may act to rapidly transfer heat, generated by thelight source elements 51, to thelower cover 82 for dissipation of the heat to outside air. - The printed
circuit board 52 may include patterned wires connected to respective electrodes of thelight source elements 51. The patterned wires of the printedcircuit board 52 may serve to transmit drive signals to thelight source elements 51. The printedcircuit board 52 may also include aconnector 53 connected to a main board (or a power board) 82 e. Theconnector 53 may be located at an upper surface, or a lower surface of the printedcircuit board 52. In the drawing, theconnector 53 is illustrated as being located at the lower surface of the printedcircuit board 52. - The
optical sheets 60 may include aprotective sheet 61, aprism sheet 62, and a diffusing sheet 63. - The
protective sheet 61 may be provided on theprism sheet 62, and may serve to protect theprism sheet 62 that is sensitive to dust, scratches, and other irritants. - The
prism sheet 62 may be provided on the diffusing sheet 63 and may condense the light, diffused by the diffusing sheet 63, in a direction perpendicular to a plane of theliquid crystal panel 20. - An upper surface of the
prism sheet 62 may be provided with prism-shaped ridgelines. The prism-shaped ridgelines may extend lengthwise in a horizontal, or vertical direction of theprism sheet 62. Here, the direction in which the prism-shaped ridgelines of theprism sheet 62 extend may conform to that of the prism-shaped or lens-shaped ridgelines of thelight guide plate 40. - The diffusing sheet 63 may be provided on the
light guide plate 40. The diffusing sheet 63 may include a bead-shaped coating layer to diffuse the light emitted from theupper surface 42 of thelight guide plate 40 and supply the light to theliquid crystal panel 20. - In addition, the reflecting
sheet 70 may be provided below thelight guide plate 40. The reflectingsheet 70 serves reflects the totally reflected downward light from thelight guide plate 40 so as to direct the light to thelight guide plate 40. - The
cover assembly 80 may include anupper cover 81, thelower cover 82, and an intermediate supportingmember 83. - The
upper cover 81 may include abezel portion 81 a and anupper sidewall 81 b, and thelower cover 82 may include abottom portion 82 a and alower sidewall 82 b. - The
bezel portion 81 a of theupper cover 81 may extend along the rim of theliquid crystal panel 20. Anend 81 a′ of thebezel portion 81 a may be positioned to substantially correspond to an edge of thelight guide plate 40 or of theoptical sheets 60. This may maximize an available imaging area of theliquid crystal panel 20 and may reduce a width of thebezel portion 81 a to a range of 3˜10 mm, resulting in a super narrow bezel design. - The
bottom portion 82 a of thelower cover 82 may support the reflectingsheet 70, thelight guide plate 40, and theoptical sheets 60. Thelower cover 82 may further include asubstrate receiving portion 82 c in which the printedcircuit board 52 may be disposed. Thesubstrate receiving portion 82 c may be indented with respect to the surrounding portion thereof. Once the printedcircuit board 52 is disposed in thesubstrate receiving portion 82 c, the printedcircuit board 52 may be fixed to thebottom portion 82 a via fastening of screws S. - The
substrate receiving portion 82 c of thebottom portion 82 a may have a through-hole 82 d such that theconnector 53 of the printedcircuit board 52 may be inserted therethrough so as to be exposed outside the lower cover. Theconnector 53 of the printedcircuit board 52 may be connected to the main board 82 e. - The
upper sidewall 81 b and thelower sidewall 82 b may be fastened to each other using screws S. In this way, theupper cover 81 and thelower cover 82 may be integrated. - The intermediate supporting
member 83 may include abody 83 a and apress portion 83 b. - The
body 83 a may be vertically oriented such that the top thereof may contact thebezel portion 81 a of theupper cover 81 and the bottom thereof may be supported by thebottom portion 82 a of thelower cover 82. - The
body 83 a may be made of plastics or metals. In particular, if thebody 83 a is made of metals, thebody 83 a may easily transfer heat generated by thelight source elements 51 to the outside. In this case, a radiatingplate 54 may be provided at the back of thelight source elements 51 to assure easy heat transfer from thelight source elements 51 to thebody 83 a. - The
press portion 83 b may be disposed between theliquid crystal panel 20 and theoptical sheets 60 so as to provide a predetermined gap between theliquid crystal panel 20 and theoptical sheets 60. - The
press portion 83 b may support theliquid crystal panel 20 from the lower side thereof, and also, may press theoptical sheets 60 downward from the upper side thereof. Thus, thepress portion 83 b may firmly fix theoptical sheets 60, thelight guide plate 40, and the reflectingsheet 70 to thebottom portion 82 a. - The
press portion 83 b may protrude inward from thebody 83 a by a width suitable for pressing theoptical sheets 60 downward. Conventionally, a protruding width of thepress portion 83 b may be in a range of about 2-3 mm. Limiting the protruding width of thepress portion 83 b as much as possible enables a super narrow bezel design because by reducing the protruding width of thepress portion 83 b of the intermediate supportingmember 83, a thickness of thebezel portion 81 a of theupper cover 81 may also be reduced. - In an alternative embodiment, although not illustrated, the
press portion 83 b may be disposed between thelight guide plate 40 and theoptical sheets 60 and may serve to press thelight guide plate 40 downward and firmly fix thelight guide plate 40 and the reflectingsheet 70 to thebottom portion 82 a. Similarly, thepress portion 83 b may protrude from thebody 83 a by a width suitable for pressing thelight guide plate 40 downward. Conventionally, a protruding width of thepress portion 83 b may be in a range of about 2-3 mm. - Hereinafter, operations and effects of the liquid crystal display according to the above described embodiments will be described in detail.
-
FIGS. 6 and 7 are diagrammatic views illustrating a light propagation path in the liquid crystal display according to an embodiment. - As illustrated in
FIGS. 1 to 7 , thebacklight unit 30 may provide theliquid crystal panel 20 with light. Thelight source elements 51 may emit light upon receiving drive signals. The light emitted from thelight source elements 51 may be introduced into thelight guide plate 40 through at least one side surface 41. - The light, introduced into the
light guide plate 40, may be totally internally reflected by the prism-shaped or lens-shaped ridgelines formed at theupper surface 42 of thelight guide plate 40. Specifically, after the light is introduced into thelight guide plate 40, the light is totally internally reflected within thelight guide plate 40, thereby being transmitted along the prism-shaped or lens-shaped ridgelines to an opposite side surface 41. As the light totally reflected within thelight guide plate 40 is scattered by the patterns during the above described transmission and reflection, the light is then emitted toward theliquid crystal panel 20. Thereby, thelight guide plate 40 provides a surface light source. - As the patterns of the
light guide plate 40 disturb the total reflection of light, the light emitted from theupper surface 42 of thelight guide plate 40 is subjected to optical-mixing, re-reflection, etc. while passing through theoptical sheets 60, thereby providing a backlight source of theliquid crystal panel 20. - In conclusion, hot spots do not occur even when the light emitted from the
light source elements 51 is introduced into thelight guide plate 40 through the at least one side surface 41. That is, the prism-shaped or lens-shaped ridgelines formed at theupper surface 42 of thelight guide plate 40 increase optical-mixing effects, enabling an a moiré phenomenon (non-uniformity in the luminance of a display) to be limited. This effect, in particular, may be doubled if the direction of the prism-shaped or lens-shaped ridgelines of thelight guide plate 40 coincides with that of the prism-shaped ridgelines of theprism sheet 62. - The
light source elements 51 may be divided into a plurality of blocks and each of the blocks may be individually controlled. For example, a first block B1 and a third block B3 may be turned on, and a second block B2 and a fourth block B4 may be turned off. In this case, light emitted from the first block B1 and the third block B3 may be reflected along the prism-shaped or lens-shaped ridgelines of thelight guide plate 40 provided at positions corresponding to the first and third blocks B1 and B3 without moving to a peripheral region corresponding to the second and fourth blocks B2 and B4. - In conclusion, it may be possible to prevent the light emitted from the respective blocks B1 to B4 from illuminating the peripheral region, and consequently, it may be possible to effectively provide for local dimming. This effect, in particularly, may be doubled if the direction of the prism-shaped or lens-shaped ridgelines of the
light guide plate 40 coincides with that of the prism-shaped ridgelines of theprism sheet 62. -
FIG. 8 is an exploded perspective view of a liquid crystal display according to another embodiment, andFIG. 9 is a sectional view of the liquid crystal display ofFIG. 8 . - As illustrated in
FIGS. 8 and 9 , a liquid crystal display 210 may include aliquid crystal panel 220, abacklight unit 230, and a cover assembly 280 surrounding the aforementioned components. Hereinafter, a description of the same configuration as theliquid crystal display 10 illustrated inFIGS. 1 to 7 will be omitted, and only a different configuration of the liquid crystal display 210 will be described in detail. - The
liquid crystal panel 220 may function as a display unit of the liquid crystal display 210. - The
backlight unit 230 may include alight guide plate 240, alight source unit 250,optical sheets 260, a reflectingsheet 270, and a diffusingplate 290. - The
light guide plate 240 may be made of acryl-based resin, and may have an approximately hexahedral shape. - The
light guide plate 240 may be provided at alower surface 243 thereof with various patterns. The patterns of thelight guide plate 240 disturb the total internal reflection of light introduced into thelight guide plate 240, thus providing uniform emission of the light from an upper surface 242 of thelight guide plate 240. The light is emitted from the upper surface 242 of thelight guide plate 240, such that thelight guide plate 240 defines a surface light source. - According to the present embodiment, the upper surface 242 of the
light guide plate 240 has no prism-shaped or lens-shaped ridgelines. The upper surface 242 of thelight guide plate 240 may be a smooth surface. In the present embodiment, a diffusingplate 290 may be provided above thelight guide plate 240. - The diffusing
plate 290 may be disposed between thelight guide plate 240 and theoptical sheets 260. The diffusingplate 290 may cause mixing of light that is not introduced into thelight guide plate 240. A thickness of the diffusingplate 290 may be freely selected according to the level of moiré (non-uniformity in the luminance of a display). For example, a thick diffusing plate may be used if a moiré problem is serious, and a thin diffusing plate may be used if there is little problem with moiré. - The
light source unit 250 may supply light to one or more of the side surfaces 241 a, 241 b, 241 c and 241 d of thelight guide plate 240. Thelight source unit 250 may includelight source elements 251 which emit light, and a printedcircuit board 252 that supports thelight source elements 251. - The
light source elements 251 may be arranged close to at least one side surface 241 of thelight guide plate 240. Specifically, thelight source elements 251 may be arranged to face one or more of the side surfaces 241 a to 241 d, so as to directly introduce light into thelight guide plate 240 via the one or more side surfaces. - The printed
circuit board 252 may be disposed close to thelower surface 243 of thelight guide plate 240, and more specifically, may be disposed between thelight guide plate 240 and alower cover 282. The printedcircuit board 252 may be made of plastics or metals. In particular, if the printedcircuit board 252 is made of a metal, such as aluminum, it may enhance thermal conductivity of the printedcircuit board 52. In this case, the metallic printedcircuit board 252 may rapidly transfer heat generated by thelight source elements 251 to thelower cover 282 for dissipation of the heat to outside air. - The
optical sheets 260 may include aprotective sheet 261, aprism sheet 262, and a diffusingsheet 263. - The reflecting
sheet 270 may be disposed below thelight guide plate 240. The reflectingsheet 270 may serve to reflect light of the totally reflected light from a upper surface of thelight guide plate 240, so as to direct the light to thelight guide plate 240. - The cover assembly 280 may include an
upper cover 281, alower cover 282, and an intermediate supportingmember 283. - The
upper cover 281 may include abezel portion 281 a and anupper sidewall 281 b. Thelower cover 282 may include abottom portion 282 a and alower sidewall 282 b. - The intermediate supporting
member 283 may include abody 283 a and apress portion 283 b. - The
body 283 a may be vertically oriented such that the top thereof supports thebezel portion 281 a of theupper cover 281 and the bottom thereof is supported by thebottom portion 282 a of thelower cover 282. In the present embodiment, thebody 283 a may be centrally provided with a steppedportion 283 c. The steppedportion 283 c may serve to support the diffusingplate 290. Specifically, the steppedportion 283 c may be located at an outer edge region of thelight guide plate 240 to support a portion of the diffusingplate 290 extending outward from the edge of thelight guide plate 240. - In an alternative embodiment, although not illustrated, the diffusing
plate 290 may be disposed between theoptical sheets 260. For example, the diffusingplate 290 may be disposed between the diffusingsheet 263 and theprism sheet 262, or between theprism sheet 262 and theprotective sheet 261. - The
press portion 283 b may be disposed between theliquid crystal panel 220 and theoptical sheets 260 and may provide a predetermined gap between theliquid crystal panel 220 and theoptical sheets 260. - Hereinafter, operations and effects of the liquid crystal display of the present embodiment will be described in detail.
-
FIGS. 10 and 11 are diagrammatic views illustrating light propagation paths in the liquid crystal display according to an embodiment. - The
backlight unit 230 may supply light to theliquid crystal panel 220. Thelight source elements 251 may emit light upon receiving drive signals. The light emitted from thelight source elements 251 may be introduced into thelight guide plate 240 through at least one side surface 241. - The light, introduced into the
light guide plate 240 through the at least one side surfaces 241, may be transmitted to an opposite side surface via total internal reflection within thelight guide plate 240. As the light is totally internally reflected within thelight guide plate 240, the light is scattered by the patterns provided on the lower surface of thelight guide plate 240, such that some of the light is emitted from thelight guide plate 240 toward theliquid crystal panel 220. Thus, thelight guide plate 240 functions as a surface light source. Also, the light, which is emitted from the upper surface 242 of thelight guide plate 240 without being totally reflected within thelight guide plate 240, may be optically-mixing by the diffusingplate 290. - As the patterns of the
light guide plate 240 disturb the total internal reflection of light, the light emitted from the upper surface 242 of thelight guide plate 240 is subjected to optical-mixing, re-reflection, etc. while passing through theoptical sheets 260. Thus, the backlight source of theliquid crystal panel 220 is provided. - In conclusion, hot spots to not occur even when the light emitted from the
light source elements 251 is introduced into thelight guide plate 240 through at least one of the side surfaces 241 a to 241 d. That is, the diffusingplate 290 and theoptical sheets 260 provide an optical mixing of the light, enabling a moiré phenomenon (non-uniformity in the luminance of a display) to be limited. - The
light source elements 251 may be divided into a plurality of blocks and each of the blocks may be individually controlled. For example, a first block B1 and a third block B3 may be turned on, and a second block B2 and a fourth block B4 may be turned off. In this case, light emitted from the first block B1 and the third block B3 illuminate a region corresponding to the first and third blocks B1 and B3 without illuminating a peripheral region corresponding to the second and fourth blocks B2 and B4. - As a result, it may be possible to prevent light emitted from the respective blocks B1 to B4 from illuminating the peripheral region, and consequently, it may be possible to efficiently provide for local dimming.
- As is apparent from the above description, a liquid crystal display according to an embodiment may be free from moiré despite having a super narrow bezel, resulting in an improvement in image quality.
- Further, more efficient local dimming may be realized, resulting in an improvement in a contrast ratio, thus improving image quality.
- Although a few embodiments have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the inventive concept, the scope of which is defined in the claims and their equivalents.
Claims (26)
1. A liquid crystal display comprising:
a liquid crystal panel;
a light source unit which emits light; and
a light guide plate comprising at least one side surface which receives the light from the light source unit, and transmits light to the liquid crystal panel,
wherein the light source unit comprises:
a plurality of light source elements which emit light and which are disposed adjacent to the at least one side surface of the light guide plate; and
a printed circuit board which supports the light source elements and is disposed adjacent to the light guide plate.
2. The liquid crystal display according to claim 1 , further comprising a bottom portion which supports the light guide plate,
wherein the printed circuit board is disposed between the light guide plate and the bottom portion.
3. The liquid crystal display according to claim 1 , further comprising a bezel portion which covers a rim of the liquid crystal panel,
wherein an inner end of the bezel portion is provided at a position substantially corresponding to an outer edge of the light guide plate.
4. The liquid crystal display according to claim 3 , wherein a width of the bezel portion is about 3 mm to about 10 mm.
5. The liquid crystal display according to claim 1 , wherein the light guide plate comprises an upper surface comprising a plurality of ridges which are one of prism-shaped and lens-shaped.
6. The liquid crystal display according to claim 5 , further comprising a prism sheet disposed between the liquid crystal panel and the light guide plate,
wherein the prism sheet comprises a plurality of prism-shaped ridges which extend in a direction which is the same as a direction in which the ridges of the light guide plate extend.
7. The liquid crystal display according to claim 5 , wherein the light which is emitted from the light source elements is emitted in a direction which substantially coincides with a direction in which the ridges of the light guide plate extend.
8. The liquid crystal display according to claim 6 , wherein the light which is emitted from the light source elements is emitted in a direction which substantially coincides with the direction in which the prism-shaped ridges of the prism sheet extend.
9. The liquid crystal display according to claim 1 , further comprising a diffusing plate which is disposed above the light guide plate and which optically mixes the light incident thereon.
10. The liquid crystal display according to claim 9 , further comprising a plurality of optical sheets stacked on the light guide plate,
wherein the diffusing plate is disposed between the plurality of optical sheets.
11. The liquid crystal display according to claim 2 , wherein the printed circuit board is made of a metal and transfers heat, generated by the light source elements, to the bottom portion.
12. The liquid crystal display according to claim 1 , further comprising a cover assembly which supports the liquid crystal panel and the light guide plate, wherein the cover assembly comprises:
an upper cover and a lower cover which define an external portion of the cover assembly; and
an intermediate supporting member disposed between the upper cover and the lower cover, which supports the light guide plate.
13. The liquid crystal display according to claim 12 , wherein:
the intermediate supporting member comprises a body and a press portion; and
the press portion is disposed between the liquid crystal panel and the light guide plate and protrudes inward from a position corresponding to an outer edge of the light guide plate.
14. The liquid crystal display according to claim 13 , wherein a width of the press portion protruding inward from the outer edge of the light guide plate is about 2 mm to about 3 mm.
15. The liquid crystal display according to claim 13 , wherein the body of the intermediate supporting member contacts the light source elements and transfers heat, generated by the light source elements, to an outer surface of the intermediate supporting member.
16. The liquid crystal display according to claim 1 , further comprising a plurality of optical sheets disposed between the liquid crystal panel and the light guide plate.
17. The liquid crystal display according to claim 1 , further comprising a reflecting sheet disposed below the light guide plate.
18. A backlight unit comprising:
a light guide plate;
a plurality of light source elements which emit light and which are arranged to face at least one side surface of the light guide plate; and
a printed circuit board which supports the plurality of light source elements and which is arranged to face the light guide plate.
19. A liquid crystal display comprising:
a liquid crystal panel;
a plurality of optical sheets disposed below the liquid crystal panel;
a light guide plate disposed below the optical sheets;
a reflecting sheet disposed below the light guide plate;
a light source unit which emits light to at least one side surface of the light guide plate; and
a cover assembly which supports the liquid crystal panel, optical sheets, light guide plate, reflecting sheet and light source unit,
wherein the light source unit comprises:
a plurality of light source elements disposed between a sidewall of the cover assembly and the at least one side surface of the light guide plate, wherein the plurality of light source elements emit light to the at least one side surface of the light guide plate; and
a printed circuit board which supports the plurality of light source elements and which is disposed between a bottom portion of the cover assembly and the light guide plate.
20. The liquid crystal display according to claim 19 , wherein the light guide plate comprises an upper surface comprising a plurality of ridges which are one of prism-shaped and lens-shaped.
21. The liquid crystal display according to claim 20 , wherein:
the plurality of optical sheets comprise a prism sheet comprising a plurality of prism-shaped ridges;
the ridges of the prism sheet extend in a direction which is the same as a direction of in which the ridges of the light guide plate extend.
22. The liquid crystal display according to claim 19 , further comprising a diffusing plate which is disposed above the light guide plate and which optically mixes the light incident thereon.
23. The liquid crystal display according to claim 19 , wherein:
the cover assembly comprises a bezel portion which covers a rim of the liquid crystal panel;
wherein an inner edge of the bezel portion is provided at a position substantially corresponding to an outer edge of the light guide plate.
24. The liquid crystal display according to claim 19 , wherein:
the cover assembly comprises a press portion disposed between the liquid crystal panel and the optical sheets; and
the press portion protrudes inward from an outer edge of the optical sheets.
25. A liquid crystal display comprising:
a liquid crystal panel;
a light guide plate comprising a plurality of side surfaces, a lower surface, and an upper surface which is opposite the lower surface;
a plurality of light source elements which emit light and are disposed such that they are adjacent to and substantially parallel to at least one side surface of the light guide plate; and
a printed circuit board on which the plurality of light source elements are mounted,
wherein the printed circuit board is adjacent to and substantially parallel to the light guide plate,
wherein light incident on the at least one side surface of the light guide plate is emitted through the upper surface of the light guide plate.
26. A backlight unit comprising:
a light guide plate comprising a plurality of side surfaces, a lower surface, and an upper surface which is opposite the lower surface,
a plurality of light source elements which emit light and are disposed such that they are adjacent to and substantially parallel to at least one side surface of the light guide plate; and
a printed circuit board on which the plurality of light source elements are mounted, wherein the printed circuit board is adjacent to and substantially parallel to the light guide plate;
wherein light incident on the at least one side surface of the light guide plate is emitted through the upper surface of the light guide plate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US14/021,342 US20140009718A1 (en) | 2010-09-20 | 2013-09-09 | Backlight unit and liquid crystal display having the same |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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KR10-2010-0092592 | 2010-09-20 | ||
KR1020100092592A KR20120030821A (en) | 2010-09-20 | 2010-09-20 | Back light unit and liquid crystal display having the same |
US13/224,926 US8547498B2 (en) | 2010-09-20 | 2011-09-02 | Backlight unit and liquid crystal display having the same |
US14/021,342 US20140009718A1 (en) | 2010-09-20 | 2013-09-09 | Backlight unit and liquid crystal display having the same |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/224,926 Continuation US8547498B2 (en) | 2010-09-20 | 2011-09-02 | Backlight unit and liquid crystal display having the same |
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US14/021,342 Abandoned US20140009718A1 (en) | 2010-09-20 | 2013-09-09 | Backlight unit and liquid crystal display having the same |
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KR (1) | KR20120030821A (en) |
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Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101295358B1 (en) * | 2011-03-16 | 2013-08-12 | 삼성전자주식회사 | Liquid crystal display and led module thereof |
KR20130032138A (en) * | 2011-09-22 | 2013-04-01 | 삼성전자주식회사 | Display module |
US20130077014A1 (en) * | 2011-09-28 | 2013-03-28 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | LED Backlight Module and Liquid Crystal Display Device |
KR20130040661A (en) * | 2011-10-14 | 2013-04-24 | 삼성전자주식회사 | Back light unit and display device having the same |
KR20130090713A (en) * | 2012-02-06 | 2013-08-14 | 삼성전자주식회사 | Display apparatus and manufacturing method thereof |
KR101307960B1 (en) * | 2012-04-26 | 2013-09-12 | 엘지디스플레이 주식회사 | Display device |
KR101971581B1 (en) * | 2012-06-12 | 2019-04-23 | 삼성전자주식회사 | Liquid crystal display module and liquid crystal display apparatus having the same |
TWM440408U (en) * | 2012-06-29 | 2012-11-01 | Kocam Int Co Ltd | LED panel light structure |
CN102798044B (en) * | 2012-08-02 | 2014-09-10 | 深圳市华星光电技术有限公司 | Edge-lighting backlight module |
US9022636B2 (en) | 2012-08-02 | 2015-05-05 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Side-edge backlight module |
EP2902694B1 (en) | 2012-09-27 | 2020-11-04 | LG Innotek Co., Ltd. | Illuminating device and vehicle lamp comprising same |
CN102927534A (en) * | 2012-11-14 | 2013-02-13 | 深圳市华星光电技术有限公司 | Backlight module and protective cover of backlight module and liquid crystal display device of backlight module |
WO2014137032A1 (en) | 2013-03-08 | 2014-09-12 | Lg Electronics Inc. | Display device |
WO2014148363A1 (en) * | 2013-03-19 | 2014-09-25 | 堺ディスプレイプロダクト株式会社 | Backlight device, and display device |
CN103207468B (en) * | 2013-03-19 | 2016-09-07 | 京东方科技集团股份有限公司 | A kind of touch control type LCD device |
JP5867740B2 (en) * | 2013-04-26 | 2016-02-24 | コニカミノルタ株式会社 | Light emitting device and image forming apparatus |
CN105264412A (en) * | 2013-07-16 | 2016-01-20 | 夏普株式会社 | Lighting device, display device, and television receiver |
US9274362B2 (en) * | 2014-03-21 | 2016-03-01 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Curved liquid crystal display device |
US20150277025A1 (en) * | 2014-03-27 | 2015-10-01 | Acrylic Design Associates, Inc. | Fine line gridable light panel |
JP6462337B2 (en) * | 2014-11-26 | 2019-01-30 | 京セラ株式会社 | Liquid crystal display |
KR101640705B1 (en) * | 2015-01-21 | 2016-07-18 | (주)뉴옵틱스 | Curved display device and housing thereof |
KR102367068B1 (en) | 2015-03-31 | 2022-02-24 | 삼성전자주식회사 | Display apparatus |
JP2017096799A (en) * | 2015-11-25 | 2017-06-01 | 日本精機株式会社 | Display device |
KR102473305B1 (en) * | 2015-12-30 | 2022-12-01 | 엘지디스플레이 주식회사 | Backlight unit and moblie electronic device comprising the same |
US11454386B2 (en) | 2017-06-06 | 2022-09-27 | Signify Holding B.V. | Panel module and method for obtaining the same |
US11079638B2 (en) * | 2018-06-13 | 2021-08-03 | Hewlett-Packard Development Company, L.P. | Display devices with integrated timing controllers |
CN209167742U (en) * | 2018-12-26 | 2019-07-26 | 深圳Tcl新技术有限公司 | Display device |
WO2023184097A1 (en) * | 2022-03-28 | 2023-10-05 | 京东方科技集团股份有限公司 | Backlight module and display device |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6717559B2 (en) | 2001-01-16 | 2004-04-06 | Visteon Global Technologies, Inc. | Temperature compensated parallel LED drive circuit |
KR100852167B1 (en) * | 2002-03-08 | 2008-08-13 | 삼성전자주식회사 | Flat Panel Display Device |
JP4533728B2 (en) | 2004-11-29 | 2010-09-01 | 株式会社 日立ディスプレイズ | Liquid crystal display |
KR20070034707A (en) * | 2005-09-26 | 2007-03-29 | 삼성전자주식회사 | Display device |
KR20080000328U (en) | 2006-09-15 | 2008-03-20 | 타이완 나노 일렉트로-옵티컬 테크놀러지 컴퍼니, 리미티드 | Backlight module configuration improvements |
TW200813562A (en) | 2006-09-15 | 2008-03-16 | Taiwan Nano Electro Opt Tech | Backlight module |
KR100821042B1 (en) * | 2006-09-22 | 2008-04-08 | 삼성에스디아이 주식회사 | Liquid Crystal Display Device and Portable Display Appratus using the same |
KR101375851B1 (en) | 2007-06-01 | 2014-04-01 | 엘지디스플레이 주식회사 | Liquid crystal display device |
US8411228B2 (en) * | 2008-03-07 | 2013-04-02 | Sharp Kabushiki Kaisha | Light emitting module, backlight unit and liquid crystal display device |
JP5261035B2 (en) | 2008-06-11 | 2013-08-14 | シャープ株式会社 | Backlight unit and liquid crystal display device |
JP5097060B2 (en) * | 2008-09-04 | 2012-12-12 | 株式会社日立製作所 | Liquid crystal display |
KR101529556B1 (en) * | 2008-12-26 | 2015-06-17 | 엘지디스플레이 주식회사 | Liquid crystal display device having good heat radiating function |
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2010
- 2010-09-20 KR KR1020100092592A patent/KR20120030821A/en not_active Application Discontinuation
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2011
- 2011-09-02 US US13/224,926 patent/US8547498B2/en active Active
- 2011-09-14 EP EP13189009.7A patent/EP2687900A3/en not_active Withdrawn
- 2011-09-14 EP EP11181261A patent/EP2431793A3/en not_active Withdrawn
- 2011-09-20 CN CN201110280141XA patent/CN102411230A/en active Pending
-
2013
- 2013-09-09 US US14/021,342 patent/US20140009718A1/en not_active Abandoned
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US8547498B2 (en) | 2013-10-01 |
US20120069263A1 (en) | 2012-03-22 |
EP2431793A2 (en) | 2012-03-21 |
EP2431793A3 (en) | 2012-05-23 |
KR20120030821A (en) | 2012-03-29 |
EP2687900A2 (en) | 2014-01-22 |
EP2687900A3 (en) | 2014-12-10 |
CN102411230A (en) | 2012-04-11 |
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Legal Events
Date | Code | Title | Description |
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STCB | Information on status: application discontinuation |
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