KR20130010209A - Backlight unit and display system - Google Patents

Backlight unit and display system

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Publication number
KR20130010209A
KR20130010209A KR1020110070865A KR20110070865A KR20130010209A KR 20130010209 A KR20130010209 A KR 20130010209A KR 1020110070865 A KR1020110070865 A KR 1020110070865A KR 20110070865 A KR20110070865 A KR 20110070865A KR 20130010209 A KR20130010209 A KR 20130010209A
Authority
KR
South Korea
Prior art keywords
optical sheet
guide plate
protrusion
light guide
backlight unit
Prior art date
Application number
KR1020110070865A
Other languages
Korean (ko)
Inventor
이정호
임동훈
Original Assignee
엘지이노텍 주식회사
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 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020110070865A priority Critical patent/KR20130010209A/en
Publication of KR20130010209A publication Critical patent/KR20130010209A/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—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
    • G02B6/0093—Means for protecting the light guide
    • 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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • 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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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)

Abstract

Embodiments include a light emitting device; A light guide plate for guiding light irradiated from the light emitting element; An optical sheet disposed on the front surface of the light guide plate; And a bottom chassis disposed under the light guide plate, wherein the light guide plate includes a first protrusion protruding in the direction of the optical sheet in a region where the optical sheet is disposed.

Description

Backlight unit and display system

Embodiments relate to a backlight unit and a display device.

In general, liquid crystal displays have better visibility than Cathode Ray Tubes (CRTs), are smaller than cathode ray tubes with the same screen size, and have lower heat generation. It is widely used as a display device of a mobile phone, a computer monitor, or a television.

The driving principle of the liquid crystal display device is to use the optical anisotropy and polarization property of the liquid crystal. Since the liquid crystal is thin and long in structure, the liquid crystal has directivity in the arrangement of molecules, and the direction of the arrangement of molecules can be controlled by artificially applying an electric field to the liquid crystal.

Therefore, if the molecular arrangement direction of the liquid crystal is arbitrarily adjusted, the molecular arrangement of the liquid crystal is changed, and light is refracted in the molecular arrangement direction of the liquid crystal due to optical anisotropy to express image information.

However, since the liquid crystal display is a light-receiving element that does not emit light by itself, a separate light source is required, and a backlight unit is used as the light source. That is, the light emitted from the backlight unit disposed under the liquid crystal display panel may be incident on the liquid crystal display panel to display an image by adjusting the amount of light transmitted according to the arrangement of the liquid crystals.

The embodiment provides a backlight and a display device in which the optical sheet is stably fixed to improve reliability.

Embodiments include a light emitting device; A light guide plate for guiding light irradiated from the light emitting element; An optical sheet disposed on the front surface of the light guide plate; And a bottom chassis disposed under the light guide plate, wherein the light guide plate includes a first protrusion protruding in the direction of the optical sheet in a region where the optical sheet is disposed.

In this case, the optical sheet may include a groove or a through portion coupled to the first protrusion.

The apparatus may further include a mold frame including a groove coupled to the first protrusion.

In addition, the first protrusion may pass through the through part formed in the optical sheet to be coupled to the groove formed in the mold frame.

The first protrusion may be formed at an edge region or a central region of the light guide plate.

The first protrusion may be formed at an edge region of the light guide plate such that the light guide plate has a cavity and the optical sheet is formed on the cavity.

The backlight unit may further include a reflective sheet disposed between the light guide plate and the lower chassis.

The backlight unit may further include a bracket to which the light emitting device is fixed and attached to the lower chassis.

In addition, the first protrusion may be formed in any one or several forms of a circular, elliptical, polygonal shape.

In addition, the shape of the grooves or through portions of the first protrusion and the optical sheet may be the same, or the size of the shape of the first protrusions may be smaller than the size of the shape of the grooves or through portions of the optical sheet.

In addition, the shape of the groove or through portion of the first protrusion and the optical sheet and the shape of the groove of the mold frame is the same, or the size of the shape of the first protrusion portion is the size of the shape of the groove or through portion of the optical sheet and the mold It may be smaller than the size of the shape of the groove of the frame.

In addition, the lower chassis may have a second protrusion.

In addition, the second protrusion may protrude in the direction of the light guide plate.

The backlight and the display device according to the embodiment can stably fix the optical sheet to provide a backlight and the display device with improved reliability.

1 is a cross-sectional view of a backlight unit according to an embodiment;
2 and 3 illustrate an embodiment in which a light guide plate including a protrusion and an optical sheet are coupled to each other.
4 to 6 illustrate a backlight unit according to another embodiment;
7 illustrates a backlight unit of another embodiment;
8 illustrates a backlight unit of another embodiment;
9 illustrates a display device according to an embodiment.

In the description of the embodiment according to the present invention, when described as being formed on the "on or under" of each element, the (up) or down (on) or under) includes both two elements being directly contacted with each other or one or more other elements are formed indirectly between the two elements. Also, when expressed as "on or under", it may include not only an upward direction but also a downward direction with respect to one element. Hereinafter, the technical problems and features of the embodiments according to the present invention will become apparent through the accompanying drawings and the description of the embodiments. Hereinafter, the technical problems and features of the embodiments according to the present invention will become apparent through the accompanying drawings and the description of the embodiments. While embodiments in accordance with the present invention allow for various modifications and variations, specific embodiments thereof are illustrated and illustrated in the drawings and will be described in detail below. However, it is not intended to limit the embodiments according to the invention to the particular forms disclosed, but rather the invention includes all modifications, equivalents, and substitutes consistent with the spirit of the invention as defined by the claims.

Like reference numerals denote like elements throughout the description of the drawings. In the drawings the dimensions of layers and regions are exaggerated for clarity. Each embodiment described herein also includes an embodiment of a complementary conductivity type. Hereinafter, a backlight unit and a display device according to an exemplary embodiment will be described with reference to the accompanying drawings.

1 is a cross-sectional view of a backlight unit according to an embodiment.

Referring to FIG. 1, the backlight unit includes a bottom chassis 110, a bracket 222, a light emitting element 224, a reflective sheet 120, a light guide plate 130, an optical sheet 140, and a mold frame ( 160).

The lower chassis 110 accommodates the reflective sheet 120, the light guide plate 130, the optical sheet 140, and the light emitting element 224, and may be made of metal such as aluminum, zinc, copper, iron, stainless steel, alloys thereof, or the like. Can be done. In addition, the lower chassis 110 supports the reflective sheet 120, the light guide plate 130, and the optical sheet 140.

The lower chassis 110 may be formed by protruding one region or may be formed flat in a date. In addition, the second chassis 302 of the lower chassis 110 may be formed or a plurality of protrusions may be formed to prevent twisting or bending of the lower chassis 110.

The second protrusion 302 formed of the lower chassis 110 may protrude in the direction of the light guide plate 130.

The light emitting device 224 generates light to irradiate light onto the light incident surface of the light guide plate 130. The light emitting device 224 may include a substrate and LED packages. In this case, the substrate may be a printed circuit board and is attached to the bracket 222. The bracket 222 is attached to the side portion of the lower chassis 110 and may emit heat generated from the LED packages 224. It may also be configured to extend in the vertical direction.

1 illustrates an example of a two-edge backlight unit having a bracket 222 on which a light emitting device 224 is fixed to a pair of side surfaces facing each other, but is not limited thereto.

The light emitting devices 224 may be spaced apart from each other on the substrate, and irradiate light onto the light incident surface of the light guide plate 130.

The light emitting device 224 may include a substrate and a light source. A light source may be mounted on the substrate, and the substrate may include an adapter for supplying power and an electrode pattern for connecting the light source. For example, a carbon nanotube electrode pattern for connecting the light source and the adapter may be formed on the upper surface of the substrate.

The substrate may be made of polyethylene terephthalate (PET), glass, polycarbonate (PC), silicon (Si), or the like, and may be a printed circuit board (PCB) substrate on which a plurality of light sources are mounted, and may be formed in a film form. In addition, the substrate may selectively use a single layer PCB, a multilayer PCB, a ceramic substrate, a metal core PCB and the like.

The light source may be a light emitting diode chip, which may consist of a blue LED chip or an ultraviolet LED chip, or a red LED chip, a green LED chip, a blue LED chip, a yellow green LED chip, white It may be configured in the form of an LED package combining at least one or more of the LED chip. The white LED may be implemented by combining yellow phosphor on a blue LED, or using red phosphor and green phosphor on a blue LED at the same time.

In this case, the LED packages mounted on the substrate may be arranged side by side on the substrate, or may be arranged side by side in a plurality of rows.

The LED packages or the plurality of light emitting elements 224 of the light emitting element 224 may be driven for each divided region.

The reflective sheet 120 is disposed between the lower chassis 110 and the light guide plate 130, and reflects the light emitted to the rear surface of the light guide plate 130 to be reincident to the light guide plate 130.

The light guide plate 130 is disposed in front of the lower chassis 110, and receives light emitted from the light emitting element 224 to guide in a predetermined direction. That is, the light guide plate 130 converts the line light source emitted from the light emitting element 224 into a surface light source and transmits the light source to the liquid crystal display panel (not shown).

The light guide plate 130 is made of a transparent material, for example, an acrylic resin series such as polymethyl metaacrylate (PMMA), polyethylene terephthlate (PET), polycarbonate (PC), cycloolefin copolymer (COC), and polyethylene naphthalate (PEN) resin. One or more of the plurality of dots or V-shaped holes (not shown) may be formed on the top or bottom surface for uniform reflection of light.

In addition, the light guide plate 130 of the embodiment may include a first protrusion 301 protruding in the direction of the optical sheet 140 in a region where the optical sheet 140 is disposed. The first protrusion 301 may be formed by injection molding a material forming the light guide plate 130. The first protrusion 301 may be formed in any one or several forms of a circular, elliptical, and polygonal shape.

In this case, the optical sheet 140 may include a groove coupled to the first protrusion 301, and the first protrusion 301 may be coupled to the groove of the optical sheet 140.

In some embodiments, the optical sheet 140 may include a through portion (hole) coupled to the first protrusion, and the first protrusion 301 of the light guide plate 130 may be a through portion of the optical sheet 140. Can be placed through.

The optical sheet 140 is disposed on the front surface of the light guide plate 130 and improves light characteristics that pass through. Referring to FIG. 8, the optical sheet 140 includes a diffusion sheet 142 for diffusing light incident from the light guide plate 130 and a prism sheet 144 for changing the light incident from the diffusion sheet 142 to be emitted vertically. It may include. Such a diffusion sheet and a prism sheet may be formed by appropriately combining two to three sheets, and the combination order is not limited.

In addition, the optical sheet 140 may further include a protective sheet 146 disposed on the diffusion sheet 142 or the prism sheet 146. The protective sheet 146 protects the diffusion sheet 142 and the prism sheet 144 which are sensitive to dust or scratches and prevents the flow of the diffusion sheet 142 and the prism sheet 144 when carrying the backlight unit. Play a role.

Since the optical sheet 140 may have a groove or a through portion that is coupled to the protrusion of the light guide plate 130, the optical sheet 140 may be a combination of the diffusion sheet 142, the prism sheet 144, and the protective sheet 146. When formed, grooves are formed in at least some of the diffusion sheet 142, the prism sheet 144, and the protective sheet 146, or the optical sheet 140 is the diffusion sheet 142 or the prism sheet. 144, a penetrating portion may be formed in both the protective sheet 146.

The reflective sheet 120 is disposed on at least one region in front of the lower chassis 110, the light guide plate 130 is disposed on the reflective sheet 120, and the optical sheet 140 is disposed on the light guide plate 130.

The mold frame 160 is disposed to surround the side surface of the lower side of the lower chassis 110 and the edge region of the front surface of the optical sheet 140, and has an opening that exposes the optical sheet 140. That is, the mold frame 160 extends inwardly from the vertical portion 162 to surround the vertical portion 162 in contact with the outer surface of the side surface of the lower chassis 110 and the edge region of the front surface of the optical sheet 140. Section 164. At this time, the inside of the upper edge 164 is an opening that exposes the optical sheet 140.

According to an embodiment, the mold frame 160 may include a groove coupled to the protrusion of the light guide plate 130.

Therefore, the embodiment is arranged by combining the protrusions formed in the light guide plate and the grooves or through-holes formed in the optical sheet 140, or by combining the protrusions formed in the light guide plate and the grooves formed in the mold frame 160, thereby stably placing the optical sheet. Fixing may provide a backlight and a display device having improved reliability.

2 and 3 illustrate an embodiment in which a light guide plate including a protrusion and an optical sheet are coupled to each other.

Referring to FIG. 2, the light guide plate 130 may include at least one first protrusion 301 protruding in the direction of the optical sheet 140 in a region where the optical sheet 140 is disposed.

In this case, the shape of the first protrusion 301 is not limited, and may be a circular or elliptical shape, or a polygonal shape such as a triangle or a square.

In addition, the height of the first protrusion 301 may be set variously according to the embodiment. For example, the height of the first protrusion 301 may be set to the height of the groove formed in the optical sheet 140, the height of the through part formed in the optical sheet 140, or may pass through the optical sheet 140 to mold the frame. When combined with the groove formed in the 160 may be set to the sum of the height of the optical sheet 140 and the height of the groove formed in the mold frame 160.

The optical sheet 140 may include a groove coupled to the first protrusion 301, and the first protrusion 301 may be coupled to the groove of the optical sheet 140.

In some embodiments, the optical sheet 140 may include a through portion (hole) coupled to the first protrusion 301, and the first protrusion of the light guide plate 130 may be a through portion of the optical sheet 140. 301 may be disposed through.

3 illustrates an embodiment in which the light guide plate 130 and the optical sheet 140 are coupled to each other. Referring to FIG. 3, the first protrusion 301 formed on the light guide plate 130 may be combined with a groove or through portion formed in the optical sheet 140.

4 to 6 are diagrams illustrating a backlight unit according to another embodiment.

4 to 5, the first protrusion 401 may be formed in an edge region of the light guide plate 130 included in the backlight unit to form a cavity in the light guide plate 130, and the optical sheet 140 may include the light guide plate. It may be disposed on the cavity formed at 130.

FIG. 6 is a view in which the optical sheet 140 is disposed and coupled to a cavity formed in the light guide plate 130.

In addition, according to the embodiment, the first protrusion is formed in both the edge region and the center region of the light guide plate 130, and the cavity is formed in the light guide plate so that the optical sheet is disposed on the cavity, thereby combining with the first protrusion formed in the center region. It may be.

6 illustrates a backlight unit according to another embodiment.

Referring to FIG. 6, according to an embodiment, the mold frame 160 may include a groove 702 coupled to the first protrusion 701 of the light guide plate 130.

Therefore, in the embodiment, the first protrusion 701 formed on the light guide plate 130 and the groove 702 formed on the mold frame 160 are coupled to each other, or the first protrusion 701 and the optical sheet formed on the light guide plate 130 are disposed. By combining and arranging the grooves 702 formed in the through part and the mold frame 160 to the 140, the optical sheet may be stably fixed to provide a backlight and a display device having improved reliability.

In this case, the first protrusion 701, the groove or through portion formed in the optical sheet 140, and the groove 702 formed in the mold frame 160 may have the same shape.

8 is a diagram illustrating a backlight unit of another embodiment.

Referring to FIG. 8, according to an embodiment, the mold frame 160 may include a groove 802 that engages with the first protrusion 801 of the light guide plate 130.

Therefore, in the embodiment, the first protrusion 801 formed on the light guide plate 130 and the groove 802 formed on the mold frame 160 are coupled to each other, or the first protrusion 801 and the optical sheet formed on the light guide plate 130 are disposed. By combining and arranging the through part 803 formed in the 140 and the groove 802 formed in the mold frame 160, the optical sheet may be stably fixed to provide a backlight and a display device having improved reliability.

At this time, according to the embodiment, the size of the first protrusion 801 is formed in the shape of the groove or through part 803 formed in the optical sheet 140 and the groove 802 formed in the mold frame 160. It may be smaller than size.

9 illustrates a display device according to an exemplary embodiment. 9 illustrates a display device including the backlight unit illustrated in FIG. 1.

Referring to FIG. 9, the display device includes a backlight unit 710 and a liquid crystal display panel 720. Since the backlight unit 710 is the same as described with reference to FIGS. 1 to 8, a description thereof will be omitted below to avoid duplication.

The liquid crystal display panel 720 is mounted on the mold frame 160 and disposed on the top (or front) of the optical sheet 140. The liquid crystal display panel 720 is in a state where the liquid crystal is positioned between the glass substrates and the polarizing plates are placed on both glass substrates in order to use polarization of light. Here, the liquid crystal has an intermediate characteristic between the liquid and the solid, and the liquid crystal, which is an organic molecule having fluidity like a liquid, is regularly arranged like a crystal, and the image of the liquid crystal is changed by using an external electric field. Is displayed. A color filter (not shown) may be provided on the front surface of the liquid crystal display panel 720.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

110: bottom chassis
120: reflective sheet
130: light guide plate
140: optical sheet
160: mold frame
222: bracket
224: light emitting element

Claims (14)

Light emitting element;
A light guide plate for guiding light irradiated from the light emitting element;
An optical sheet disposed on the front surface of the light guide plate;
A bottom chassis disposed under the light guide plate;
The light guide plate includes a first protrusion protruding in the direction of the optical sheet in a region where the optical sheet is disposed. The method of claim 1,
The optical sheet includes a groove or through portion coupled to the first protrusion. The method of claim 1,
The backlight unit further comprises a mold frame including a groove coupled to the first protrusion. The method of claim 3,
And the first protrusion is coupled to the groove formed in the mold frame through the through part formed in the optical sheet. The method of claim 1,
The first protrusion is formed in the edge region or the center region of the light guide plate. The method of claim 1,
And the first protrusion is formed at an edge region of the light guide plate such that the light guide plate has a cavity and the optical sheet is formed on the cavity. The method of claim 1,
And a reflective sheet disposed between the light guide plate and the lower chassis. The method of claim 1,
And a bracket to which the light emitting element is fixed and attached to the lower chassis. The method of claim 1,
The first protrusion is formed of any one or several of circular, elliptical, polygonal shape. The method of claim 2,
2. The backlight unit of claim 1, wherein the grooves or through portions of the first protrusion and the optical sheet have the same shape, or the shape of the first protrusions is smaller than the shape of the grooves or through portions of the optical sheet. The method of claim 3,
The shape of the groove or through portion of the first protrusion and the optical sheet and the shape of the groove of the mold frame are the same, or the size of the shape of the first protrusion is the size of the shape of the groove or through portion of the optical sheet and the shape of the mold frame. Backlight unit smaller than the size of the groove shape. The method of claim 1, wherein
The lower chassis is a backlight unit formed with a second projection. The method of claim 12,
And the second protrusion protrudes in the direction of the light guide plate. Display panel;
It includes a backlight unit for irradiating light to the display panel,
The display unit using the backlight unit is any one of the backlight unit of claim 1.
KR1020110070865A 2011-07-18 2011-07-18 Backlight unit and display system KR20130010209A (en)

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Application Number Priority Date Filing Date Title
KR1020110070865A KR20130010209A (en) 2011-07-18 2011-07-18 Backlight unit and display system

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Publication Number Publication Date
KR20130010209A true KR20130010209A (en) 2013-01-28

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104613419A (en) * 2013-11-04 2015-05-13 苏州璨宇光学有限公司 Light guide structure
CN104763979A (en) * 2015-01-28 2015-07-08 合肥京东方光电科技有限公司 LGP (Light Guide Plate), backlight module and display device
KR20180047616A (en) * 2016-10-31 2018-05-10 엘지디스플레이 주식회사 Liquid crystal display device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104613419A (en) * 2013-11-04 2015-05-13 苏州璨宇光学有限公司 Light guide structure
CN104763979A (en) * 2015-01-28 2015-07-08 合肥京东方光电科技有限公司 LGP (Light Guide Plate), backlight module and display device
WO2016119411A1 (en) * 2015-01-28 2016-08-04 京东方科技集团股份有限公司 Light guide plate, backlight module, and display device
US10191209B2 (en) 2015-01-28 2019-01-29 Boe Technology Group Co., Ltd. Light guide plate, backlight module and display device
KR20180047616A (en) * 2016-10-31 2018-05-10 엘지디스플레이 주식회사 Liquid crystal display device

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