KR20130035781A - Backlgiht unit and liquid crystal display device the same - Google Patents

Backlgiht unit and liquid crystal display device the same Download PDF

Info

Publication number
KR20130035781A
KR20130035781A KR1020110100310A KR20110100310A KR20130035781A KR 20130035781 A KR20130035781 A KR 20130035781A KR 1020110100310 A KR1020110100310 A KR 1020110100310A KR 20110100310 A KR20110100310 A KR 20110100310A KR 20130035781 A KR20130035781 A KR 20130035781A
Authority
KR
South Korea
Prior art keywords
reflective sheet
light
reflecting
liquid crystal
reflector
Prior art date
Application number
KR1020110100310A
Other languages
Korean (ko)
Inventor
이종국
이민희
Original Assignee
엘지디스플레이 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 엘지디스플레이 주식회사 filed Critical 엘지디스플레이 주식회사
Priority to KR1020110100310A priority Critical patent/KR20130035781A/en
Publication of KR20130035781A publication Critical patent/KR20130035781A/en

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02F1/133553—Reflecting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/34—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 reflector
    • 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
    • G02F2203/00—Function characteristic
    • G02F2203/02—Function characteristic reflective

Landscapes

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

Abstract

The present invention discloses a backlight unit that can simplify manufacturing and reduce manufacturing costs as well as implement uniform luminance.
The disclosed backlight unit includes a bottom cover having an open top surface, a plurality of light emitting diodes provided at corners of the bottom cover, and a reflective sheet for directly reflecting light emitted from the plurality of light emitting diodes in the upper direction and converting the light into surface light. The reflective sheet has a plurality of inclined surfaces having different inclination angles.

Description

BACKLGIHT UNIT AND LIQUID CRYSTAL DISPLAY DEVICE THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight unit. The present invention relates to a backlight unit and a liquid crystal display device having the same, which can simplify manufacturing and reduce manufacturing costs, as well as realize uniform luminance.

BACKGROUND ART Liquid crystal display devices have tended to be gradually widened due to their light weight, thinness, and low power consumption. Accordingly, the liquid crystal display device is proceeding in the direction of large-sized, thin, and low power consumption in response to the demand of the user.

A general liquid crystal display device includes a thin film transistor including a lower substrate on which a pattern of a gate line, a data line, a pixel electrode, etc. is formed, and an upper substrate on which a pattern of a black matrix, a color filter, etc. are formed are bonded to each other with a liquid crystal layer interposed therebetween. It includes a liquid crystal display panel.

Unlike the CRT, the liquid crystal display is not a display device that emits light by itself, and thus, a backlight unit including a separate light source is provided on the back of the liquid crystal display panel to provide light for visually representing an image.

The backlight unit is divided into an edge method and a direct method according to the position of the light source.

The edge type backlight unit is mainly applied to a relatively small liquid crystal display device such as a laptop computer and a desktop computer monitor, and has good light uniformity, long lifespan, and an advantage in thinning a liquid crystal display device. .

The direct type backlight unit began to be developed mainly as the size of the liquid crystal display device increased to 20 inches or more. will be. Such a direct-type backlight unit is mainly used for a large-screen liquid crystal display device which requires a high luminance because the utilization efficiency of light is higher than that of the edge type.

The backlight unit uses a plasma light source such as a cold cathode fluorescent lamp (CCFL), a hot cathode fluorescent tube (HCFL), an external electrode fluorescent tube (EEFL), and an external & internal electrode fluorescent tube (EIFL). Or a light emitting diode (LED) is used.

Among them, light emitting diodes (LEDs) are used for their advantages of long life, low power, small size, and high durability.

The edge type backlight unit with a light emitting diode (LED) includes a light guide plate for converting point light into surface light, and includes a diffusion sheet, a plurality of prism sheets, and a protective sheet disposed on the light guide plate. In addition, a plurality of light emitting diodes (LEDs) are disposed on both side surfaces of the light guide plate.

However, a general edge type backlight unit includes a light guide plate for converting point light of a light emitting diode (LED) disposed on a side surface to surface light to provide light to a liquid crystal display panel, thereby increasing the manufacturing cost and weight of the light guide plate. There was a problem, and since a plurality of light emitting diodes which are symmetrical with each other along both sides of the light guide plate is provided, there is a limit in manufacturing saving thereof.

In addition, a general edge-edge backlight unit has a problem in that a luminance difference is generated between an edge region adjacent to an area where the light emitting diode is disposed and a center region of the light guide plate when light is incident on the light guide plate.

The present invention has a purpose of a backlight unit and a liquid crystal display device having the same, which can simplify manufacturing and reduce manufacturing costs as well as realize uniform luminance.

In a backlight unit according to an embodiment of the present invention,

A bottom cover with an upper surface opened; A plurality of light emitting diodes respectively provided at edges of the bottom cover; And a reflection sheet for directly reflecting the light emitted from the plurality of light emitting diodes in the upper direction and converting the light into surface light, wherein the reflection sheet has a plurality of inclined surfaces having different inclination angles.

According to another embodiment of the present invention,

A bottom cover with an upper surface opened; A plurality of light emitting diodes respectively provided at edges of the bottom cover; A reflective sheet for directly reflecting the light emitted from the plurality of light emitting diodes in a direction upward to convert the light into surface light; And a liquid crystal display panel on the reflective sheet, wherein the reflective sheet has a plurality of inclined surfaces having different inclination angles.

The backlight unit of the present invention described above is not converted to the surface light through the other medium different from the air from the first to fourth light emitting diodes, and is reflected on the reflective sheet and provided to the liquid crystal display panel, thereby minimizing light loss. Has

In addition, in the edge type backlight unit according to the exemplary embodiment of the present invention, the first to fourth light emitting diodes are disposed at the corners of the bottom cover, and the first to fourth reflectors are formed by the reflective sheet having the first to fourth reflecting portions. As a structure for providing light emitted from the light emitting diode to the liquid crystal display panel, the manufacturing cost can be reduced by eliminating the light guide plate provided in the backlight unit of the general edge method, and the manufacturing cost can be reduced by reducing the number of light emitting diodes. have.

In addition, the present invention implements a uniform brightness of the liquid crystal display panel by the first to fourth reflecting portions of the reflective sheet, so that the edge region and the light guide plate adjacent to the region where the light emitting diodes generated in the backlight unit of the general edge type are disposed. The luminance difference in the center area can be prevented.

1 is an exploded perspective view illustrating a liquid crystal display according to an exemplary embodiment of the present invention.
FIG. 2 is a cross-sectional view of the liquid crystal display taken along the line II ′ of FIG. 1.
3 is a plan view illustrating a backlight unit according to an exemplary embodiment of the present invention.
4 is a cross-sectional view illustrating the backlight unit cut along the line II-II ′ of FIG. 3.
FIG. 5 is a cross-sectional view illustrating the backlight unit cut along the line III-III ′ of FIG. 3.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, embodiments of the present invention will be described in detail.

The embodiments of the present invention are intended to enable those skilled in the art to fully understand the technical idea of the present invention. Therefore, the present invention is not limited to the embodiments described below, and other embodiments can be added on the basis of the technical idea of the present invention.

1 is an exploded perspective view illustrating a liquid crystal display device according to an exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating the liquid crystal display device taken along the line II ′ of FIG. 1.

As shown in FIG. 1 and FIG. 2, the liquid crystal display according to the exemplary embodiment of the present invention is provided with a liquid crystal display panel 110 on which an image is displayed and is disposed under the liquid crystal display panel 110 to provide light. It includes a backlight unit 120 to.

Although not shown in the drawing, the liquid crystal display may further include a panel guide (not shown) made of a mold material supporting the lower surface of the edge of the liquid crystal display panel 110 and assembled with the backlight unit 120. The display device may further include a top cover (not shown) surrounding the top edge of the liquid crystal display panel 110.

The liquid crystal display panel 110 includes a thin film transistor substrate 111 and a color filter substrate 113 bonded together so as to maintain a uniform cell gap facing each other, and a liquid crystal layer interposed between the two substrates.

The thin film transistor substrate 111 and the color filter substrate 113 will be described in detail. In the thin film transistor substrate 111, a plurality of gate lines and data lines intersect to define a pixel, and each thin film transistor ( TFT is provided to connect one-to-one with a pixel electrode mounted on each pixel. The color filter substrate 113 includes a color filter of R, G, and B colors corresponding to each pixel, and a black matrix bordering each of the color filters and covering a gate line, a data line, and a thin film transistor.

A driving PCB 115 may be provided at an edge of the liquid crystal display panel 110 to supply a driving signal to a gate line and a data line.

The driving PCB 115 may be electrically connected to the liquid crystal display panel 110 by a chip on film 117.

The COF 117 may be changed to a tape carrier package (TCP).

The backlight unit 120 disposed below the liquid crystal display panel 110 may include a bottom cover 190 having an upper surface, a reflective sheet 180 provided on the bottom cover 190, and the bottom cover 190. A plurality of light emitting diodes 151, 153, and 155 respectively provided at corners of the light emitting diodes, and optical sheets disposed on the reflective sheet 180 to diffuse and focus light reflected from the reflective sheet 180. 130).

The optical sheets 130 include a diffusion sheet, a light collecting sheet, and a protective sheet. Here, the optical sheets 130 may be composed of one diffusion sheet and two condensing sheets, or may be composed of two diffusion sheets and one condensing sheet.

In the edge-type backlight unit 120 according to an exemplary embodiment of the present invention, a plurality of light emitting diodes 151, 153, and 155 are disposed at an edge of the bottom cover 190, and the light emitting diodes 151, 153, and 155 are disposed. As a structure having a reflective sheet 180 for reflecting the light emitted from the light toward the liquid crystal display panel 110, the light guide plate provided in the backlight unit of the general edge method can be deleted.

The reflective sheet 180 of the present invention has a plurality of inclined surfaces having inclined angles symmetric with each other or having different inclined angles.

The structure of the backlight unit 120 according to an embodiment of the present invention will be described in detail with reference to FIGS. 3 to 5.

3 is a plan view illustrating a backlight unit according to an exemplary embodiment of the present invention, FIG. 4 is a cross-sectional view illustrating the backlight unit cut along the line II-II ′ of FIG. 3, and FIG. 5 is a III-III of FIG. 3. It is sectional drawing which shows the backlight unit cut along the III 'line.

3 to 5, the backlight unit according to the exemplary embodiment of the present invention shows a state in which the optical sheets 130 of FIG. 1 are deleted.

First to fourth light emitting diodes 151 to 157 are provided at the corners of the bottom cover 190, and the reflective sheet 180 is disposed on the bottom cover 190.

The reflective sheet 180 has a function of reflecting light from the first to fourth light emitting diodes 151 to 157 and providing the reflected light to the liquid crystal display panel.

The reflective sheet 180 has first and second reflecting portions 181 and 183 that are inclined with respect to the center portion C.

The first and second reflectors 181 and 183 have tilt angles that are symmetrical with respect to the center portion C.

That is, the first and second reflecting portions 181 and 183 have a bent structure so as to be symmetrical with respect to the center portion C.

The first and second reflectors 181 and 183 may emit light from the first to fourth light emitting diodes 151 to 157 and the liquid crystal of a region corresponding to the first and second reflectors 181 and 183. Provided to the display panel. That is, the first and second reflectors 181 and 183 provide light to the central area and the peripheral area of the liquid crystal display panel.

Here, the reflective sheet 180 has a function of providing light to the center region of the liquid crystal display panel, so that the center portion C is spaced apart from the optical sheets at a predetermined distance.

The reflective sheet 180 further includes third and fourth reflectors 185 and 187 extending from the first and second reflectors 181 and 183, respectively.

The third reflector 185 extends from the first reflector 181 and has a different inclination angle from that of the first reflector 181.

The third reflector 185 may have an inclination angle that is symmetrical with the first reflector 181.

The fourth reflector 187 extends from the second reflector 183 and has a different inclination angle from the second reflector 183.

The fourth reflector 187 may have an inclination angle that is symmetrical with the second reflector 183.

The third and fourth reflectors 185 and 187 may emit light from the first to fourth light emitting diodes 151 to 157 and the liquid crystal of a region corresponding to the third and fourth reflectors 185 and 187. Provided to the display panel. That is, the third and fourth reflectors 185 and 187 provide light to edge regions of the liquid crystal display panel.

In the light path of the backlight unit of the present invention, light is emitted from the first to fourth light emitting diodes 151 to 157 and is primarily reflected by the first and second reflectors 181 and 183 to provide the liquid crystal display panel. The second and second reflection parts 185 and 187 may be secondly reflected to the edge regions of the liquid crystal display panel.

Therefore, the backlight unit of the present invention is not converted into surface light from the first to fourth light emitting diodes 151 to 157 through another medium different from air, but is reflected on the reflective sheet 180 and provided to the liquid crystal display panel, thereby providing light. It has the advantage of minimizing losses.

In the above description, the structure of the reflective sheet 180 including the first to fourth reflective parts 181 to 187 having a predetermined inclination angle on the bottom cover 190 having an upper surface is limited and described, but is not limited thereto. The bottom cover may include an inclined surface having an inclination angle corresponding to the first to fourth reflecting portions 181 to 187 to be in surface contact with the first to fourth reflecting portions 181 to 187. Can be. That is, the bottom cover may be in surface contact with the reflective sheet as a whole.

In addition, in the present invention, although the bottom cover 190 having four corners and the edge type backlight unit including four first to fourth light emitting diodes 151 to 157 are limitedly described, the present invention is limited thereto. Instead, the number of corners of the bottom cover and the number of light emitting diodes may be changed.

In the edge-type backlight unit according to the exemplary embodiment described above, the first to fourth light emitting diodes 151 to 157 are disposed at the corners of the bottom cover 190, respectively, and the first to fourth reflecting portions ( The light guide plate provided in the backlight unit of the general edge type structure is provided to provide the liquid crystal display panel with the light emitted from the first to fourth light emitting diodes 151 to 157 by the reflective sheet 180 having 181 to 187. As a result, not only the manufacturing cost can be reduced, but also the manufacturing cost can be reduced by reducing the number of light emitting diodes.

In addition, the present invention implements a uniform brightness of the liquid crystal display panel by the first to fourth reflecting portions 181 to 187 of the reflective sheet 180, so that the light emitting diodes generated in the general edge type backlight unit are disposed. The luminance difference between the edge region adjacent to the region and the central region of the light guide plate can be prevented.

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. 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.

151: first light emitting diode 153: second light emitting diode
155: third light emitting diode 157: fourth light emitting diode
180: reflection sheet 181: first reflecting portion
183: Second Reflector 185: Third Reflector
157: fourth reflecting unit

Claims (18)

A bottom cover with an upper surface opened;
A plurality of light emitting diodes respectively provided at edges of the bottom cover; And
It includes a reflective sheet for directly reflecting the light emitted from the plurality of light emitting diodes in the upper direction to convert the surface light,
The reflective sheet has a plurality of inclined surfaces having different inclination angles. The method according to claim 1,
The reflective sheet includes a first and second reflecting portion inclined with respect to the center portion. The method of claim 2,
The backlight unit has a tilt angle in which the first and second reflecting portions are symmetric to each other. The method of claim 2,
The first and second reflecting unit has a structure bent in the center portion. The method of claim 2,
The reflective sheet further includes a third reflecting portion extending from the first reflecting portion and a fourth reflecting portion extending from the second reflecting portion. 6. The method of claim 5,
And the third reflector has an inclination angle different from that of the first reflector, and the fourth reflector has a different inclination angle from the second reflector. 6. The method of claim 5,
And the third reflector has an inclination angle that is symmetrical with the first reflector. 6. The method of claim 5,
And the fourth reflecting unit has an inclination angle symmetrical with the second reflecting unit. The method according to claim 1,
The bottom cover and the reflective sheet is in contact with the backlight unit. A bottom cover with an upper surface opened;
A plurality of light emitting diodes respectively provided at edges of the bottom cover;
A reflective sheet for directly reflecting the light emitted from the plurality of light emitting diodes in a direction upward and converting the light into surface light; And
A liquid crystal display panel on the reflective sheet;
The reflective sheet has a plurality of inclined surfaces having different inclination angles. The method of claim 10,
The reflective sheet includes a first and second reflecting portion inclined with respect to the center portion. 12. The method of claim 11,
The first and second reflecting portions have an inclination angle that is symmetric to each other. 12. The method of claim 11,
And the first and second reflecting portions are bent at the center portion. 12. The method of claim 11,
The reflective sheet further includes a third reflecting portion extending from the first reflecting portion and a fourth reflecting portion extending from the second reflecting portion. 15. The method of claim 14,
And the third reflecting portion has a different inclination angle from the first reflecting portion, and the fourth reflecting portion has a different inclination angle from the second reflecting portion. 15. The method of claim 14,
And the third reflector has an inclination angle symmetrical with the first reflector. 15. The method of claim 14,
And the fourth reflector has an inclination angle that is symmetrical with the second reflector. The method of claim 10,
The bottom cover and the reflective sheet are in full contact with the liquid crystal display device.
KR1020110100310A 2011-09-30 2011-09-30 Backlgiht unit and liquid crystal display device the same KR20130035781A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110100310A KR20130035781A (en) 2011-09-30 2011-09-30 Backlgiht unit and liquid crystal display device the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110100310A KR20130035781A (en) 2011-09-30 2011-09-30 Backlgiht unit and liquid crystal display device the same

Publications (1)

Publication Number Publication Date
KR20130035781A true KR20130035781A (en) 2013-04-09

Family

ID=48437531

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110100310A KR20130035781A (en) 2011-09-30 2011-09-30 Backlgiht unit and liquid crystal display device the same

Country Status (1)

Country Link
KR (1) KR20130035781A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180025490A (en) * 2016-08-31 2018-03-09 엘지디스플레이 주식회사 bottom cover and DISPLAY DEVICE comprising the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180025490A (en) * 2016-08-31 2018-03-09 엘지디스플레이 주식회사 bottom cover and DISPLAY DEVICE comprising the same

Similar Documents

Publication Publication Date Title
US8801219B2 (en) Backlight assembly having LEDs and side reflectors and display apparatus having the same
KR101693655B1 (en) Back Light Unit And Liquid Crystal Display Device Comprising Thereof
RU2491472C1 (en) Illumination device and display device
KR101604497B1 (en) Backlight unit and liquid crystal display device having the same
KR102461530B1 (en) Deformed display device
KR101585244B1 (en) Backlight unit and liquid crystal display device having the same
JP6661346B2 (en) Liquid crystal display
KR20120118565A (en) Light emitting diode package and liquid crystal display device having the same
KR101811873B1 (en) Backlgiht unit and liquid crystal display device the same
KR102066077B1 (en) Back Light Unit and Liquid Crystal Display Device Using The Same
KR102210604B1 (en) Backlight unit and liquid crystal display device having the same
KR20140036862A (en) Backlight unit using led and liquid crystal display device including the same
KR20130035781A (en) Backlgiht unit and liquid crystal display device the same
KR101816314B1 (en) Backlgiht unit and liquid crystal display device the same
KR20220075846A (en) Display device
KR20110057710A (en) Backlight unit and liquid crystal display device having the same
KR20150055358A (en) Backlight unit and liquid crystal display device comprising the same
KR20170078480A (en) Liquid crystal display device
KR101746846B1 (en) Backlgiht unit and liquid crystal display device the same
JP2024076358A (en) BACKLIGHT UNIT AND DISPLAY DEVICE INCLUDING THE SAME
KR101948143B1 (en) backlight unit and illumination system using the same
KR101681781B1 (en) Liquid crystal display device
KR20240087138A (en) Backlight unit and display device comprising the same
KR20130015947A (en) Backlight unit
KR20120007414A (en) Backlgiht unit and liquid crystal display device the same

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
AMND Amendment
E601 Decision to refuse application
AMND Amendment