KR20110094597A - Back light unit having sliding mount structure for led package - Google Patents

Back light unit having sliding mount structure for led package Download PDF

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Publication number
KR20110094597A
KR20110094597A KR1020100014110A KR20100014110A KR20110094597A KR 20110094597 A KR20110094597 A KR 20110094597A KR 1020100014110 A KR1020100014110 A KR 1020100014110A KR 20100014110 A KR20100014110 A KR 20100014110A KR 20110094597 A KR20110094597 A KR 20110094597A
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KR
South Korea
Prior art keywords
vertical
substrate
cover bottom
led package
guide plate
Prior art date
Application number
KR1020100014110A
Other languages
Korean (ko)
Inventor
이석우
Original Assignee
엘지디스플레이 주식회사
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Application filed by 엘지디스플레이 주식회사 filed Critical 엘지디스플레이 주식회사
Priority to KR1020100014110A priority Critical patent/KR20110094597A/en
Publication of KR20110094597A publication Critical patent/KR20110094597A/en

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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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means

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

Abstract

PURPOSE: A backlight unit is provided to have a slide mounting structure which detaches a LED package to a cover bottom. CONSTITUTION: A backlight unit includes as follows. A light guiding plate. A LED package includes a substrate(PT) and a plurality LEDs on the substrate. A plurality of optical films are laminated on the light guiding plate. A guiding panel covers an edge of the cover bottom and fixes the optical films.

Description

BACK LIGHT UNIT HAVING SLIDING MOUNT STRUCTURE FOR LED PACKAGE}

The present invention relates to a backlight unit for a liquid crystal display device. In particular, the present invention relates to an edge type backlight unit having a slide type LED package mounting structure.

The liquid crystal display of the active matrix driving method displays a moving image using a thin film transistor (hereinafter referred to as TFT) as a switching element. The liquid crystal display device can be miniaturized compared to a cathode ray tube (CRT), which is applied to a display device in a portable information device, an office device, a computer, and a TV, and is rapidly replacing a cathode ray tube.

The liquid crystal display device includes a liquid crystal display panel, a backlight unit for irradiating light to the liquid crystal display panel, a light source driving circuit for driving a light source of the backlight unit, a data driving circuit for supplying a data voltage to data lines of the liquid crystal display panel, and a liquid crystal And a gate driving circuit for supplying scan pulses to gate lines (or scan lines) of the display panel, and a control circuit for controlling the driving circuits.

The backlight unit is roughly divided into a direct type and an edge type. The direct type backlight unit has a structure in which a plurality of optical sheets and a diffusion plate are stacked below the liquid crystal display panel and a plurality of light sources are disposed below the diffusion plate.

The edge type backlight unit may be implemented to be thinner than the direct type backlight unit. Currently, LCD devices have been changing from light source to light emitting diode (LED). In particular, an edge type backlight unit for arranging LEDs that can be easily disposed is used. The higher the temperature, the lower the efficiency and lifetime of the LED. In order to solve this problem, LEDs are mounted on a metal printed circuit board (PCB) having excellent heat dissipation performance.

1 is a cross-sectional view of an LCD including an edge type backlight unit including an LED array. The edge type backlight unit EBLU is disposed between the cover bottom CB, the light guide plate LG mounted on the bottom surface in the cover bottom CB, and between the side surface of the light guide plate LG and the cover bottom CB. LG) is provided with a light source for irradiating light to the side. Light sources use fluorescent lamps, but they also use LED arrays (LEDARs) with low power consumption and improved brightness. The LED array LEDAR is arranged to allow light to enter the side of the light guide plate LG by attaching to the vertical surface of the cover bottom CB. The LGP refracts the propagation path of the light incident from the LED array LEDAR at an angle substantially perpendicular to the light incident surface of the liquid crystal display panel LCDP. Optical sheets OPT are disposed between the light guide plate LG and the liquid crystal display panel LCDP. The optical sheets OPT may include at least one prism sheet, at least one diffusion sheet, and the like to diffuse light incident from the light guide plate LG. In order to improve brightness, the optical sheets OPT may further include a dual brightness enhancement film (DBEF). The guide panel GP surrounds the sides of the liquid crystal display panel LCDP and the edge type backlight unit and supports the liquid crystal display panel LCDP between the liquid crystal display panel LCDP and the optical sheets OPT. The reflective sheet REF is disposed between the cover bottom CB and the light guide plate LG, and reflects the light that may be lost from the optical sheet OPT to the lower portion and returned to the liquid crystal display panel LCDP. . The top case TP surrounds the top edge of the liquid crystal display panel LCDP and the side surface of the guide panel GP.

Looking at the process of assembling the edge type backlight unit (EBLU) shown in Figure 1 as follows. First, prepare a cover bottom (CB). The LED array LEDAR is attached to the vertical surface of the cover bottom CB. The reflective sheet REF is stored on the bottom surface of the cover bottom CB. The light guide plate LG is installed on the reflective sheet REF. The optical sheets OPT are sequentially stacked on the LGP. The guide panel GP is assembled to complete the edge type backlight unit EBLU. The LCD panel is assembled on the edge type backlight unit EBLU.

After the assembly is completed, the operation of the backlight unit (EBLU) is checked. If a problem occurs in the backlight unit EBLU, in particular, if a problem is found in the LED array LEDAR, the backlight unit EBLU is disassembled again to replace the defective LED in the LED array LEDAR. After that, the assembly must be done again. As such, in the conventional method of attaching the LED array LEDAR directly to the cover bottom CB, the entire backlight unit EBLU is again disassembled and reassembled in order to replace the entire LED or the LED array LEDAR. There is considerable inconvenience and hassle.

An object of the present invention is to provide a backlight unit having a slide mounting structure that can be easily removable to the LED package to the cover bottom as an invention devised to solve the problems of the prior art. Another object of the present invention to provide a backlight unit that can be easily removable LED package even after the backlight assembly.

In order to achieve the above object, the backlight unit for a liquid crystal display device according to the present invention includes a light guide plate; An LED package including a substrate having a width corresponding to a side thickness of one side of the light guide plate and a length corresponding to a length of one side of the light guide plate, and a plurality of LEDs arranged on the substrate; A bottom surface accommodating the light guide plate, a vertical surface bent upward to face one side surface of the light guide plate at one side of the bottom surface, and an upper surface bent to face and parallel to the bottom surface at a short side of the vertical surface; A cover bottom for receiving the substrate of the LED package so as to be inserted between the vertical plane and the down-vertical part while contacting the vertical plane with a downward vertical part bent to be parallel to and facing the vertical plane at a short side of the upper surface; A plurality of optical films stacked on one surface of the upper surface of the cover bottom on the light guide plate; And fixing the optical film, characterized in that it comprises a guide panel surrounding the edge of the cover bottom.

The cover bottom may include a lower protrusion formed at a position spaced apart from the vertical surface by a predetermined distance on the bottom surface; An upper protrusion formed on an inner surface of the descending vertical portion facing the vertical surface; The substrate of the LED package is characterized in that inserted between the vertical surface and the upper projection, and between the vertical surface and the lower projection.

The lower protrusion is spaced apart from the vertical plane by a distance corresponding to the thickness of the substrate of the LED package; The distance between the upper protrusion and the vertical plane corresponds to the thickness of the substrate of the LED package, and the width of the descending vertical portion corresponds to the distance between the LEDs on the long side of the substrate.

One end of the lower protrusion is in contact with the surface of the substrate, and the other end is in contact with the one side of the light guide plate; An outer surface of the descending vertical portion is in contact with the one side of the light guide plate.

The lower and upper projections are characterized in that the cross-sectional shape has a rounded surface, such as cylindrical and hemispherical.

The lower protrusion protrudes from an upper surface of the bottom surface by applying pressure; The upper protrusion may be protruded toward the inner surface by applying pressure from an outer surface of the descending vertical portion.

The vertical surface is characterized in that formed over the entire one side of the cover bottom.

The vertical surface is characterized in that formed on only part of the one side of the cover bottom.

The vertical surface is characterized in that a plurality of spaced apart from each other by a predetermined interval on the one side of the cover bottom.

The backlight unit for a liquid crystal display device according to the present invention has a structure in which the LED package is detachably mounted in a longitudinal direction at one end of one side of the cover bottom. Therefore, after assembling the backlight unit, even if a defect is found in the LED, the LED package can be easily detached and remounted without disassembling the entire backlight unit. In addition, the cover bottom is provided with a sliding insert corresponding to the thickness of the LED package, to prevent the flow of the LED package, to facilitate the removal and fixing of the LED package. Therefore, the backlight unit according to the present invention has an advantage of high degree of freedom in manufacturing and maintenance work.

1 is a cross-sectional view showing a liquid crystal display device employing an edge type backlight unit including an LED array.
2 is a cross-sectional view showing a liquid crystal display device employing an edge type backlight unit including an LED array according to an embodiment of the present invention.
3 illustrates an LED package in which an LED array including a plurality of LEDs according to the present invention is disposed.
4 is a view showing a cover bottom according to an embodiment of the present invention.
FIG. 5 is a cross-sectional view illustrating a structure of a part for accommodating the LED package of the cover bottom shown in FIG. 4 in a sliding manner; FIG.
6 is a view showing that the removable LED package to the cover bottom in a sliding manner.
7 is a view showing a cross section of a portion where an upper protrusion and a lower protrusion of a cover bottom according to Embodiment 2 of the present invention are formed.
8 is a view showing a cross section of a portion where an upper protrusion and a lower protrusion of a cover bottom according to Embodiment 3 of the present invention are formed.
9 is a view showing a case in which two vertical surfaces are formed at a predetermined distance apart from the cover bottom according to the fourth embodiment of the present invention.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 2 to 8.

2 is a cross-sectional view illustrating a liquid crystal display device employing an edge type backlight unit including an LED array according to a first embodiment of the present invention. The edge type backlight unit EBLU of the present invention includes an LED package LEDPKG for irradiating light to the side surface of the LGP. Optical sheets OPT are disposed between the light guide plate LG and the liquid crystal display panel LCDP. The optical sheets OPT may include at least one prism sheet, at least one diffusion sheet, and the like to diffuse light incident from the light guide plate LG, and may be substantially perpendicular to the light incident surface of the liquid crystal display panel LCDP. To deflect the path of light. The optical sheets OPT may further include a dual brightness enhancement film (DBEF). The guide panel GP surrounds the sides of the liquid crystal display panel LCDP and the edge type backlight unit EBLU and supports the liquid crystal display panel LCDP between the liquid crystal display panel LCDP and the optical sheets OPT. The cover bottom 200 surrounds the bottom surface of the edge type backlight unit EBLU. The reflective sheet REF is disposed between the cover bottom 200 and the light guide plate LG. The top case TC surrounds the side of the liquid crystal display panel LCDP and the side of the guide panel GP.

FIG. 3 is a view illustrating an LED package LEDPKG in which an LED array LEDAR including a plurality of LEDs 100 according to the present invention is disposed. The LEDs 100, which are light sources, are arranged at regular intervals in the longitudinal direction on a long and narrow, substantially rectangular substrate PT. The substrate PT is formed of a metal printed circuit board, and supplies power to each of the LEDs 100 mounted on the surface.

4 is a view showing a cover bottom 200 according to the first embodiment of the present invention. FIG. 5 is a cross-sectional view illustrating a structure of a portion for accommodating the LED package LEDPKG of the cover bottom 200 illustrated in FIG. 4 in a sliding manner. The cover bottom 200 includes a bottom surface 201 having a size and a shape that can accommodate the light guide plate LG. The vertical surface 203 is bent and formed at one side of the bottom surface 201 to which the LED package LEDPKG, which is a light source, is to be mounted. The height of the vertical plane 203 is approximately the size that can accommodate the substrate PT of the LED package LEDPKG. For example, it is preferable to have a size slightly larger than the width of the substrate PT.

The upper surface of the vertical surface 203 is formed to face the bottom surface 201, the parallel upper surface 205 is bent. The width of the upper surface 205 is preferably sized to accommodate and fix the LED package (LEDPKG). For example, it is desirable to be slightly larger than the height of the substrate PT of the LED package LEDPKG and slightly smaller than the thickness of the entire LED package LEDPKG. This is to prevent the LED 100 from being disturbed by the upper surface 205 when the LED 100 is to be in close contact with the side surface of the LGP.

In addition, at the end side of the upper surface 205, a parallel downward vertical portion 207 facing the vertical surface 203 is bent and formed. The falling vertical portion 207 preferably has a width corresponding to the width of the portion of the substrate PT protruding outward from the LED array LEDAR arranged on the surface of the LED package LEDPKG. In addition, when the width of the upper surface 205 is set equal to the height of the entire LED package (LEDPKG), the falling vertical portion 207 may serve to fix the light guide plate (LG).

On the other hand, the bottom surface 201 preferably further includes a lower projection (BH) at a position away from the vertical surface (203). The distance from the vertical surface 203 to the lower protrusion BH preferably has a size corresponding to the thickness of the substrate PT of the LED package LEDPKG. In addition, the height of the lower protrusion BH may preferably have a value corresponding to the distance from the edge of the LED package LEDPKG substrate PT to the side portion of the LED 100. In addition, the width of the lower protrusion BH is preferably equal to or smaller than the height of the LED 100 protruding from the surface of the substrate PT. This is to prevent the LED 100 from being disturbed by the lower protrusion BH when the LED 100 should be in close contact with the side surface of the LGP. When the width of the lower protrusion BH is equal to the height of the LED 100 protruding from the surface of the substrate PT, one side of the lower protrusion BH fixes the substrate PT of the LED package LEDPKG. On the other hand, the other side may serve to fix the light guide plate LG.

In addition, it is preferable to further include an upper protrusion TH on the inner side of the falling vertical portion 207, that is, the inner surface facing the vertical surface 203. The protrusion height of the upper protrusion TH is preferably set such that the distance from the surface of the vertical surface 203 to the upper surface of the upper protrusion TH corresponds to the thickness of the substrate PT of the LED package LEDPKG.

Looking at the state of assembling the cover bottom 200 and the LED package (LEDPKG) having such a structure as follows. FIG. 6 is a diagram illustrating the detachment of the LED package (LEDPKG) to the cover bottom 200 in a sliding manner.

The substrate PT end of the LED package LEDPKG is inserted into one end of the vertical surface 201 of the cover bottom 200. While the rear surface of the substrate PT is in close contact with the inner surface of the vertical surface 201, the LED package LEDPKG is pushed along the length direction. At this time, the substrate PT is pushed to the other end while being careful to be inserted between the vertical surface 201 and the upper protrusion TH and the lower protrusion BH.

As such, the upper protrusion TH and the lower protrusion BH receive and fix the substrate PT of the LED package LEDPKG. When inserting the LED package (LEDPKG), while the surface of the substrate (PT) is in direct contact with the upper projection (TH) and the lower projection (BH), the substrate (PT) should slide and move, the upper projection (TH) And lower projection (BH) preferably has a spherical shape. In particular, in order to improve the storing and fixing performance, it is even more preferable that the upper protrusion TH and the lower protrusion BH have elasticity.

The upper protrusion TH and the lower protrusion BH may be formed as protrusions having a length corresponding to the length of one side of the cover bottom 200. Alternatively, a simple protrusion may be formed by arranging a plurality of lines.

Considering these conditions, various shapes and methods of forming the upper and lower protrusions TH and BH can be considered. For example, the upper protrusion TH and the lower protrusion BH may be formed by separately preparing an elastic material such as rubber and attaching the inside of the descending vertical portion 207 to the cover bottom 200.

Hereinafter, various embodiments of the upper protrusion TH and the lower protrusion BH and the shape of the vertical surface 203 of the cover bottom 200 will be described with reference to the accompanying drawings. As illustrated in FIGS. 7 to 8, the cover bottom 200 may be processed to form the upper protrusion TH and the lower protrusion BH.

7 is a cross-sectional view of a portion in which the upper protrusion TH and the lower protrusion BH of the cover bottom 200 according to the second embodiment of the present invention are formed. According to the second embodiment, for ease of fabrication and for durability of the upper protrusion TH and the lower protrusion BH, the protrusion protrudes by applying pressure from the back surface of the descending vertical portion 207 and the cover bottom 200. It may also be formed.

8 is a cross-sectional view of a portion in which an upper protrusion TH and a lower protrusion BH of the cover bottom 200 according to Embodiment 3 of the present invention are formed. According to the third embodiment, in the case of the upper projection TH, the end of the descending vertical portion 207 may be formed by bending at a right angle as if rolling inward. In this case, when attaching and detaching the LED package (LEDPKG) by a slide method, the finishing operation of the vertical end portion 207 is smoothly finished so as not to damage the surface of the substrate (PT) due to friction with the surface of the substrate (PT). It is desirable to.

On the other hand, in the case of forming the protrusions by the extrusion method in the case of the lower protrusions (BH), in order to facilitate the formation of the protrusions and to have elasticity, short incisions are formed in parallel to the portions where the protrusions are to be formed, thereby forming protrusions. In addition, the protrusion may be extruded from the rear surface to form the upper protrusion TH and the lower protrusion BH. For convenience, only the lower protrusion BH manufactured in this manner is illustrated in FIG. 8, and the shapes of the upper protrusion TH and the lower protrusion BH are shown in the detailed description of the present invention according to the convenience of design and manufacture. It is possible to combine various cases of different methods.

In addition, according to the fourth embodiment, the bent portion capable of accommodating the LED package LEDPKG in a sliding manner may be formed over the entire one side surface of the cover bottom 200, but may be formed only in a portion thereof. For example, the vertical surface 203 may be formed on one side of the cover bottom 200, particularly the entire side of the LED package KGPKG. Alternatively, as shown in FIG. 9, only a predetermined length may be formed only on a part of the beginning and a part of the side where the LED package LEDPKG is to be accommodated.

9 is a view showing a case in which two vertical surfaces are formed at a predetermined distance apart from the cover bottom according to the fourth embodiment of the present invention. A first vertical surface 203a, a first upper surface 205a, and a first downward vertical portion 207a are formed in front of the cover bottom 200. A second vertical surface 203b, a second upper surface 205b and a second lower vertical portion 207b are formed on the rear side. In FIG. 9, the vertical surface is divided into two, but if necessary, three or more vertical surfaces may be divided on one side of the cover bottom 200.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present 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.

100: LED LCDP: liquid crystal display panel
OPT: Optical Film LEDAR: LED Array
REF: reflective film DIFF: diffuser plate
LG: Light guide plate EBLU: Edge type backlight unit
DBLU: Direct type backlight unit CB, 200: Cover bottom
TC: Top Case GP: Guide Panel
201: Bottom 203: Vertical
205: upper surface 207: descending vertical portion
203a: first vertical plane 203b: second vertical plane
205a: first upper surface 205b: second upper surface
207a: first lower vertical portion 207b: second lower vertical portion
TH: Upper projection BH: Lower projection

Claims (9)

Light guide plate;
An LED package including a substrate having a width corresponding to a side thickness of one side of the light guide plate and a length corresponding to a length of one side of the light guide plate, and a plurality of LEDs arranged on the substrate;
A bottom surface accommodating the light guide plate, a vertical surface bent upward to face one side surface of the light guide plate at one side of the bottom surface, and an upper surface bent to face and parallel to the bottom surface at a short side of the vertical surface; And a cover bottom receiving the substrate of the LED package so as to be inserted between the vertical surface and the falling vertical portion while contacting the vertical surface with a falling vertical portion bent parallel to and facing the vertical surface at a short side of the upper surface.
A plurality of optical films stacked on one surface of the upper surface of the cover bottom on the light guide plate; And
And a guide panel for fixing the optical films and surrounding an edge of the cover bottom.
The method of claim 1,
The cover bottom may include a lower protrusion formed at a position spaced apart from the vertical surface by a predetermined distance on the bottom surface;
An upper protrusion formed on an inner surface of the descending vertical portion facing the vertical surface;
And the substrate of the LED package is inserted between the vertical surface and the upper protrusion and between the vertical surface and the lower protrusion.
The method of claim 2,
The lower protrusion is spaced apart from the vertical plane by a distance corresponding to the thickness of the substrate of the LED package;
The distance between the upper projection and the vertical plane corresponds to the substrate thickness of the LED package, the width of the falling vertical portion corresponds to the distance between the LED on the long side of the substrate.
The method of claim 3, wherein
One end of the lower protrusion is in contact with the surface of the substrate, and the other end is in contact with the one side of the light guide plate;
The external surface of the falling vertical portion is in contact with the one side of the light guide plate.
The method of claim 2,
The lower protrusion and the upper protrusion is a back light unit, characterized in that the cross-sectional shape has a rounded surface, such as cylindrical and hemispherical.
The method of claim 2,
The lower protrusion protrudes from an upper surface of the bottom surface by applying pressure;
And the upper protrusion protrudes toward the inner surface by applying pressure from an outer surface of the descending vertical portion.
The method of claim 1,
The vertical surface is a backlight unit, characterized in that formed over the entire one side of the cover bottom.
The method of claim 1,
The vertical unit is a backlight unit, characterized in that formed on only a part of the one side of the cover bottom.
The method of claim 8,
The vertical surface is a back light unit, characterized in that formed on the one side of the cover bottom spaced apart from each other by a predetermined interval.
KR1020100014110A 2010-02-17 2010-02-17 Back light unit having sliding mount structure for led package KR20110094597A (en)

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KR1020100014110A KR20110094597A (en) 2010-02-17 2010-02-17 Back light unit having sliding mount structure for led package

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Application Number Priority Date Filing Date Title
KR1020100014110A KR20110094597A (en) 2010-02-17 2010-02-17 Back light unit having sliding mount structure for led package

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KR20110094597A true KR20110094597A (en) 2011-08-24

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130111770A (en) * 2012-04-02 2013-10-11 엘지이노텍 주식회사 Backlight unit
US9341767B2 (en) 2012-09-21 2016-05-17 Samsung Display Co., Ltd. Display device
US9529143B2 (en) 2014-03-24 2016-12-27 Samsung Display Co., Ltd. Backlight assembly having support frame

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130111770A (en) * 2012-04-02 2013-10-11 엘지이노텍 주식회사 Backlight unit
US9341767B2 (en) 2012-09-21 2016-05-17 Samsung Display Co., Ltd. Display device
US9529143B2 (en) 2014-03-24 2016-12-27 Samsung Display Co., Ltd. Backlight assembly having support frame

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