KR20150025404A - Backlight unit comprising light emitting diode and liquid crystal display device the same - Google Patents

Backlight unit comprising light emitting diode and liquid crystal display device the same Download PDF

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Publication number
KR20150025404A
KR20150025404A KR20130103103A KR20130103103A KR20150025404A KR 20150025404 A KR20150025404 A KR 20150025404A KR 20130103103 A KR20130103103 A KR 20130103103A KR 20130103103 A KR20130103103 A KR 20130103103A KR 20150025404 A KR20150025404 A KR 20150025404A
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KR
South Korea
Prior art keywords
light
light guide
guide plate
emitting diode
light emitting
Prior art date
Application number
KR20130103103A
Other languages
Korean (ko)
Inventor
안상현
Original Assignee
엘지디스플레이 주식회사
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Priority to KR20130103103A priority Critical patent/KR20150025404A/en
Publication of KR20150025404A publication Critical patent/KR20150025404A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/483—Containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/505—Wavelength conversion elements characterised by the shape, e.g. plate or foil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements

Abstract

The present invention discloses a backlight unit capable of minimizing a non-display area and realizing uniform brightness.
The backlight unit of the present invention includes a plurality of light emitting diodes, a light guide plate disposed in parallel with the plurality of light emitting diodes, optical sheets disposed on the light guide plate, a reflection sheet disposed below the light guide plate, The light incident portion pattern is formed in a region corresponding to the light incident portion defined as a region where light incident from the light emitting diode is mixed. The gap between the reflection sheet and the light emitting diode is larger than the gap between the light guide plate and the light emitting diode.

Description

BACKLIGHT UNIT COMPRISING LIGHT EMITTING DIODE AND LIQUID CRYSTAL DISPLAY DEVICE THE SAME Technical Field [1] The present invention relates to a backlight unit including a light emitting diode,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight unit including a light emitting diode capable of realizing a minimum bezel and a uniform luminance, and a liquid crystal display having the same.

A CRT (cathode ray tube), which is one of the widely used display devices, is mainly used for monitors such as a TV, a measurement device, and an information terminal device. However, due to the weight and size of the CRT itself, Could not respond positively to the response of

As a solution to such a problem, the liquid crystal display device has been gradually widened due to its features such as lightness, thinness, and low power consumption driving. 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.

Unlike a CRT, the liquid crystal display device is not a self-luminous display device. Therefore, a backlight unit including a separate light source for providing light for visually expressing an image is provided on a back surface of the liquid crystal display panel.

The backlight unit included in the liquid crystal display device is divided into a direct type and an edge type.

The direct-type backlight unit has a structure in which a plurality of light sources are arranged in one direction under the volcanic plate to directly provide light toward the liquid crystal display panel.

The edge type backlight unit has a structure in which a light source is disposed on a side surface of the light guide plate. Here, the liquid crystal display panel is disposed on the light guide plate. In the edge type backlight unit, the light emitted from the light source is incident on the light guide plate and converted into plane light, and the plane light converted from the light guide plate is provided to the liquid crystal display panel.

The backlight unit uses a plasma type 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 these, light emitting diodes (LEDs) are widely used because they have long life, low power, small size and high durability.

A typical medium-sized and small-sized liquid crystal display device is provided with an edge-type backlight unit advantageous for slimming, and a light-emitting diode (LED) is mainly used as a light source.

2. Description of the Related Art In recent years, a liquid crystal display device has been applied to reduce the non-display area where no image is displayed, thereby improving the quality of appearance.

However, in a liquid crystal display device provided with a general edge type backlight unit, a plurality of light emitting diodes provided on one side of the liquid crystal display device have a problem in that as the non-display area decreases, hot spots, bright lines, and the like.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a backlight unit including a light emitting diode capable of minimizing a bezel area and realizing uniform brightness, and a liquid crystal display device having the same.

A light emitting diode according to an embodiment includes a body portion including a bottom portion; A light emitting diode chip disposed on the bottom portion; A phosphor formed on the bottom portion; And a light guide portion formed on an upper surface of the body portion.

The light emitting diode according to the embodiment is characterized in that the light guide portion is disposed above and below the body portion.

In the light emitting diode according to the embodiment, the light guide portion is disposed on the upper side, the lower side, the left side and the right side of the body portion.

In the light emitting diode according to the embodiment, the light guide portion may have a bar shape.

In the light emitting diode according to the embodiment, the body portion and the light guide portion have a gradient shape.

The light emitting diode according to the embodiment is characterized in that the body portion further includes an inclined portion, the inclined portion includes a slanted surface connected to the bottom portion, a horizontal surface connected to the inclined surface, and the light guiding portion is disposed on the horizontal surface.

The light emitting diode according to an embodiment of the present invention is characterized in that the light guide portion is formed integrally with the body portion.

A backlight unit according to an embodiment includes: a light emitting diode; A light guide plate disposed in parallel with the light emitting diodes; Optical sheets disposed on the light guide plate; And a reflective sheet disposed under the light guide plate.

The backlight unit according to an embodiment of the present invention is characterized in that the light guide portion is formed on an upper surface of the body portion in a region corresponding to an upper surface and a lower surface of the light guide plate, respectively.

The backlight unit according to the embodiment is characterized in that the optical sheets include a diffusion sheet disposed on the upper surface of the light guide plate, and at least one of the lower surface and the upper surface of the diffusion sheet reflects light emitted from the light- And the light-emitting portion pattern is formed.

In the backlight unit according to the embodiment, the light-incoming portion pattern is formed in an edge region of the diffusion sheet corresponding to the incident surface of the light guide plate.

The backlight unit according to an embodiment includes a light-incoming portion pattern that reflects light emitted from the light-emitting diode in an area corresponding to an incident surface of the light guide plate among the upper regions of the light guide plate.

In the backlight unit according to the embodiment, the optical sheets are overlapped with a part of the light-incoming portion pattern.

The backlight unit according to the embodiment is such that an end of the optical sheets facing the light emitting diode is positioned at the center of the light-incident portion pattern.

The backlight unit according to the embodiment is characterized in that the backlight unit further includes a pad, one side of the back surface of the pad is disposed on the light emitting diode, and the other side is disposed on the upper surface of the light guide plate.

In the backlight unit according to the embodiment, the reflective sheet is disposed in an area of an edge area of the back surface of the light guide plate, excluding an edge area on the incident surface side of the light guide plate.

The backlight unit according to the embodiment is such that the end of the reflective sheet facing the light emitting diode is closer to the incident surface than the end of the optical sheets facing the light emitting diode.

A liquid crystal display device according to an embodiment includes a liquid crystal display panel; A panel guide for supporting a lower edge of the liquid crystal display panel; The upper edge of the liquid crystal display panel is guided by an upper case; And a backlight unit including a light emitting diode according to claim 1, a light guide plate disposed in parallel with the light emitting diode, optical sheets disposed on the light guide plate, and a reflection sheet disposed under the light guide plate, Wherein the light guide plate pattern is formed in a bottom area of the light guide plate in a bottom area of the light guide plate corresponding to a rear area of the inner end of the panel guide.

The difference between the distance from the starting point of the light guide plate pattern to the end of the panel guide and the distance from the light emitting surface of the light emitting diode to the end of the panel guide is 0.5 mm or less.

The backlight unit may further include a pad for blocking the light emitted from the light emitting diode and directed toward the upper portion of the backlight unit. The pad may be disposed between the panel guide, the light emitting diode, Is formed in a space formed by the side surface of the liquid crystal panel.

The second aspect of the reflective sheet may be spaced apart from the incident surface of the light guide plate by a certain distance so that the light incident surface of the light- It is possible to improve the luminescence and hot spot by reducing the light reflected from the light source.

In addition, in the embodiment of the present invention, the light-incoming portion pattern is formed on the upper surface of the light guide portion of the light-incident portion, thereby improving the luminescence and hot spot due to the light spots refracted between the light guide plate and the optical sheets in the light- .

Also, according to the embodiment of the present invention, the first side of the optical sheets is spaced a certain distance from the incident surface of the light guide plate to reduce the light refracted between the light guide plate and the optical sheets, thereby reducing light and improving the bright lines and hot spots .

In addition, the embodiment of the present invention uses a light emitting diode having a light guide portion as a light source of a backlight, thereby preventing light leakage and increasing luminance and providing uniform luminance.

Therefore, the embodiment according to the present invention has an optimized design that can prevent uneven brightness due to a bright line and a hot spot around a light-incoming portion in a structure in which a bezel region is minimized, Can be implemented.

1 is an exploded perspective view illustrating a liquid crystal display device according to an embodiment of the present invention.
FIG. 2 is a perspective view of the light guide plate, the optical sheets, and the reflection sheet of the light-incident portion according to the first embodiment of the present invention as viewed from below.
3 is a cross-sectional view illustrating a liquid crystal display according to the first embodiment cut along the line I-I 'of FIG.
Fig. 4 is a view showing area A of Fig.
5 is a cross-sectional view illustrating a liquid crystal display device according to a second embodiment of the present invention.
6 is a cross-sectional view of a liquid crystal display device according to a third embodiment of the present invention.
7A and 7B are top views of light emitting diodes included in the backlight unit of the liquid crystal display device according to the third embodiment.
8 and 9 are cross-sectional views of the light emitting diode of Fig. 7A taken along line II-II '.
10 is a cross-sectional view of the light emitting diode of Fig. 7A taken along line III-III '.
11 is a cross-sectional view of a liquid crystal display device according to a third embodiment of the present invention.
12 is a graph showing a viewing angle of a light emitting diode according to an embodiment of the present invention.
13 is a light emitting diode of a liquid crystal display according to a fourth embodiment of the present invention.

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

Hereinafter, a backlight unit including a light emitting diode according to an embodiment of the present invention and a liquid crystal display device having the same will be described in detail with reference to the drawings. The following embodiments are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below, but may be embodied in other forms.

FIG. 1 is an exploded perspective view illustrating a liquid crystal display device according to an embodiment of the present invention, and FIG. 2 is a perspective view of the light guide plate, the optical sheets, and the reflection sheet of the light-

FIG. 3 is a cross-sectional view illustrating a liquid crystal display device taken along the line I-I 'of FIG. 1, and FIG. 4 is a view illustrating a region A of FIG.

1 to 4, a liquid crystal display device 10 according to a first embodiment of the present invention includes a liquid crystal display panel 110 on which an image is displayed, a liquid crystal display panel 110 disposed below the liquid crystal display panel 110, And a panel guide 120 that supports the liquid crystal display panel 110 and is coupled to the backlight unit 130.

The liquid crystal display device 10 according to the present invention includes an upper case 100 surrounding an upper edge of the liquid crystal display panel 110 and a lower case 100 surrounding the lower and side surfaces of the backlight unit 130, And may further include a lower case 191 coupled thereto.

The upper case 100 has a function of protecting the liquid crystal display panel 110.

The upper case 100 may be made of an insulating material that can improve the appearance quality and reduce the manufacturing cost.

The outer surface of the lower case 191 may be made of an insulating material which is in contact with the inner surface of the upper case 100 and can improve the appearance quality and reduce the manufacturing cost.

A first pad 121 for preventing damage to the liquid crystal display panel 110 due to friction between the liquid crystal display panel 110 and the panel guide 120 is provided on the upper surface of the panel guide 120.

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 and a liquid crystal layer interposed between the two substrates 111 and 113 do.

The thin film transistor substrate 111 and the color filter substrate 113 are described in detail. Though the thin film transistor substrate 111 is formed by intersecting a plurality of gate lines and data lines and defining pixels, A thin film transistor (TFT) is provided for each intersecting region of the pixels and connected in one-to-one correspondence with the pixel electrodes mounted on the respective pixels. The color filter substrate 113 includes color filters of R, G, and B colors corresponding to the respective pixels, and a black matrix for covering the gate lines, the data lines, the thin film transistors, and the like.

A driving PCB 115 for supplying a driving signal to the gate line and the data line is provided at an edge of the liquid crystal display panel 110.

The driving PCB 115 is electrically connected to the liquid crystal display panel 110 by a chip on film (COF) 117. Here, the COF 117 may be changed to a TCP (Tape Carrier Package).

The backlight unit 130 disposed at the lower portion of the liquid crystal display panel 110 includes a bottom cover 180 having an opened top surface, a plurality of light emitting diodes 150 disposed at least one side of the bottom cover 180, And a light guide plate 160 disposed side by side with the plurality of light emitting diodes 150 and converting the light into the light plane.

The backlight unit 130 of the present invention includes a reflective sheet 170 disposed under the light guide plate 160 and reflecting the light traveling toward the lower portion of the light guide plate 160 toward the liquid crystal display panel 110, And optical sheets 140 disposed on the light guide plate 160 for diffusing and condensing the light provided from the light guide plate 160.

The first diffusion sheet 142, the light condensing sheet 143 and the second diffusion sheet 145 may be sequentially disposed on the light guide plate 160. [

The liquid crystal display device 10 according to the first embodiment of the present invention has a structure in which an image is not displayed, that is, a bezel area is minimized to improve the appearance quality.

Specifically, the upper case 100 of the present invention has a structure in which the upper region P1 is minimized. That is, the upper region P1 of the upper case 100 may be the same as or smaller than the light-incident portion P2, and the liquid crystal display device 10 according to the first embodiment may have a structure having a minimized bezel region .

One side of the light guide plate 160 facing the area where the light emitting diode 150 is disposed is defined as an incident surface 161 and the light incident portion P 2 is defined from the incident surface 161 to the panel guide 120 to the inner end 122 of the inner tube 122. That is, the light-incident portion P2 may be defined as a region where the light guide plate 160 and the panel guide 120 are vertically overlapped.

The light-incident portion P2 may be defined as a region where a plurality of light-emitting diodes 150 are incident into the light guide plate 160 and mixed.

The upper surface of the upper case 100 may have a smaller area than the upper surface of the panel guide 120. That is, the inner end of the panel guide 120 may protrude more inward than the inner end 122 of the upper case 100.

The upper region P1 of the upper case 100 may be designed to be 5 mm or less.

The backlight unit 130 of the present invention includes an optimal design for minimizing the bezel area of the liquid crystal display device 10. [

Specifically, the light guide plate 160 of the present invention includes a light-incident portion pattern 169 for reflecting light.

The light incident portion pattern 169 is provided on the upper surface of the light guide plate 160 corresponding to the light incident portion P2 of the light guide plate 160.

The light-incident portion pattern 169 is made of an opaque material and may have a black color.

The width P4 of the light-incident portion pattern 169 may be defined as a length from one side adjacent to the light-emitting diode to the other side far from the light-emitting diode. Or the width of the light-landing portion pattern 169 may be defined as the sum of the lengths L1 and L2.

The light-incident portion pattern 169 may reduce hot spots and bright lines generated in the light-incident portion P2 by the light emitted from the light-emitting diode 150. [

The light-incident portion pattern 169 may be formed on the upper surface of the light guide plate 160 through a printing process.

The first side 141 of the optical sheets 140 adjacent to the light emitting diode 150 may be spaced a certain distance from the incident surface 161 of the light guide plate 160. An area between the incident surface 161 and the first side 141 of the optical sheets 140 may be defined as a first area P3.

That is, the distance between the optical sheets 140 and the LED 150 may be greater than the distance between the LGP 160 and the LED 150.

The first side 141 of the optical sheets 140 of the present invention is spaced a certain distance from the incident surface 161 of the light guide plate 160 because the light incident on the light guide plate 160, And to improve the luminance unevenness of the pixel P2.

The first side 141 of the optical sheets 140 of the present invention is spaced a certain distance from the incident surface 161 of the light guide plate 160 to uniformly guide the brightness of the light-

The optical sheets 140 may be overlapped with the light-incident portion pattern 169 for a predetermined interval.

The optical sheets 140 may be in contact with each other in a section overlapped with the light-incoming portion pattern 169. [

The light-incident portion pattern 169 may define a first width L1 and a second width L2 based on a point where the first side 141 of the optical sheets 140 is positioned.

4, the side surface of the light-incident portion pattern 169 is shown as being flush with the incident surface 161 of the light guide plate 160. However, the present invention is not limited thereto, and the reflection pattern 169 may be formed on the light- The inner surface of the upper surface may be formed of a region partially inward from an end of the upper surface. That is, the first width L1 of the light-incident portion pattern 169 may be smaller than the first width P3.

The point where the first side 141 of the optical sheets 140 are located may be the intermediate point of the light-incoming portion pattern 169. [

In this case, the first width L1 and the second width L2 may be the same length.

The point where the first side 141 of the optical sheets 140 are positioned is positioned at the midpoint of the light-incident portion pattern 169, thereby preventing secondary light leakage.

That is, the end regions of the optical sheets 140 may block the light that is not blocked by the light-incident portion pattern 169 from coming out of the optical sheets 140.

The lower surface 167 of the light guide plate 160 includes a pattern region 167b having a light guide plate pattern for refracting incident light and a non-pattern region 167a having no pattern formed thereon.

The pattern area 167b may be formed in a direction from the bottom of the light guide plate 160 corresponding to the backside area of the inner end of the panel guide 120 to the inside of the light guide plate 160. [

The non-patterned region 167a is located in a region corresponding to the light-incident portion P2 of the light guide plate 160. [ Referring to the drawings, the non-patterned area 167a may be defined as P6.

Here, the non-patterned region 167a has a function of reducing the refraction of light incident from the incident surface 161 to improve the luminance unevenness of the light-incident portion P2.

The non-patterned region 167a may be located in a region of the light-incident portion P2 from a lower surface of one side of the light guide plate 160 defined by the incident surface 161 and may have a smaller area than the light-incident portion P2.

That is, the non-patterned region 167a may have a smaller area than the light-incident portion P2.

The pattern area 167b may be formed on the lower surface 167 of the light guide plate 160 that does not correspond to the light incident part P2 and may be formed on the lower surface 167 of the light guide plate 160 corresponding to a part of the light- As shown in FIG.

The distance from the starting point of the pattern region 167b to the end of the panel guide 120 is L3 and the distance from the light emitting surface of the light emitting diode 150 to the end of the panel guide 120 is L4 , The difference in distance between L4 and L3 is preferably 0.5 mm or less. If the distance between L4 and L3 is greater than or equal to 0.5 mm, a luminance loss may occur. If the distance L3 is greater than the distance L4, an area of the light guide plate 160 in front of the pattern area 167b May occur. Therefore, it is preferable that there is no difference in the distance between L4 and L3 or 0.5 mm or less.

The second side surface 171 of the reflective sheet 170 adjacent to the light emitting diode 150 may be spaced apart from the incident surface 161 of the light guide plate 160 by a predetermined distance. Here, the interval between the incident surface 161 and the second side surface 171 of the reflective sheet 170 may be defined as a second area P5.

That is, the distance between the reflective sheet 170 and the LED 150 may be greater than the distance between the LGP 160 and the LED 150.

The second side surface 171 of the reflective sheet 170 of the present invention is spaced a certain distance from the incident surface 161 of the light guide plate 160 because the light incident on the incident surface 161 of the light guide plate 160 The section of the light guide plate 160 which is bent upward by the reflection sheet 170 is reduced from the lower surface of the light guide plate 160 to improve the luminance unevenness of the light-incident portion P2.

The reflective sheet 170 of the present invention uniformly guides the brightness of the light-incident portion P2 by reducing light reflected vertically away from the incident surface 161 of the light guide plate 160 by a certain distance.

The second region P5 may be smaller than the first region P3.

The second region P5 may be smaller than the width P4 of the light-incident portion pattern 169. [

The width P4 of the light-incident portion pattern 169 may be smaller than the non-display regions 167a and P6 and the light-incident portion P2.

The area of the first area P3, the second area P5, the width P4 of the light-incident part pattern 169, the non-display areas 167a and P6 and the light-incident part P2 is 1: 2: 4: 5: 8.

The backlight unit 130 of the liquid crystal display device 10 according to the first embodiment may further include a second pad 300.

The second pad 300 may block light emitted from the light emitting diode 150.

One end of the back surface of the second pad 300 may be disposed on the light emitting diode 150 and the other end may be disposed on the top surface of the light guide plate 160.

Although the other end of the second pad 300 is shown as being disposed in a part of the upper region of the light-incident portion pattern 169 in the drawing, the present invention is not limited thereto, When the first width L1 is smaller than the length of the first area P3, the second pad 300 is disposed on the upper surface end region of the light guide plate 160 on which the light-incident portion pattern 169 is not formed .

The second pad 300 blocks the yellow light from the light passing through the mold surrounding the light emitting diode 150, thereby preventing a hot spot and a bright line defect.

Meanwhile, the second pad 300 may be made of an elastic material, and may be fixed between the LED 150 and the panel guide 120 to form an adhesive component on the upper surface and the back surface of the second pad 300, .

The liquid crystal display device 10 according to the first embodiment of the present invention described with reference to FIGS. 1 to 4 may be configured such that the light-incident portion P2 has a minimized bezel area The second side surface 171 of the reflective sheet 170 is separated from the incident surface 161 of the light guide plate 160 by a certain distance to reduce the light reflected by the light incident portion P2, Can be improved.

According to the first embodiment, the light-incident portion pattern 169 is formed on the upper surface of the light guide plate 160 of the light-incident portion P2 to refract the light-guiding portion P2 between the light guide plate 160 and the optical sheets 140 It is possible to improve the bright lines and hot spots due to the light source.

The first side 141 of the optical sheets 140 may be spaced a certain distance from the incident surface 161 of the light guide plate 160 and between the light guide plate 160 and the optical sheets 140 It is possible to improve the luminance and hot spot by reducing the light refracted by the light.

Therefore, according to the first embodiment, in the structure in which the bezel area is minimized, it is possible to provide a display device having an excellent design quality that is excellent in appearance quality and can prevent uneven brightness due to bright lines and hot spots around the light- It is advantageous to realize one luminance.

5 is a cross-sectional view illustrating a liquid crystal display device according to a second embodiment of the present invention.

5, the liquid crystal display device 10 according to the second embodiment of the present invention includes all of the structures except for the optical sheets 240 and the light-incoming portion pattern 269 in the first embodiment of the present invention Are the same as those of the liquid crystal display device 10 according to the first embodiment and are denoted by the same reference numerals, and detailed description thereof will be omitted.

The optical sates 240 according to the second embodiment of the present invention include the first diffusion sheet 242, the light condensing sheet 243 and the second diffusion sheet 245 sequentially disposed on the light guide plate 160 .

The optical sheets 240 may include a first diffusion sheet 242, a light-condensing sheet 243, and a second diffusion sheet 245 sequentially disposed on the light guide plate 160.

The first diffusion sheet 242 may have the same area as the entire upper surface of the light guide plate 160.

One side of the first diffusion sheet 242 adjacent to the light emitting diode 150 may have the same position in a direction perpendicular to the incident plane of the light guide plate 160. That is, the gap between the first diffusion sheet 242 and the light emitting diode 150 may have a structure in which the distance between the light incident surface 161 of the light guide plate 160 and the light emitting diode 150 is equal to each other.

The light-incident portion pattern 269 may be formed on at least one of the upper surface and the lower surface of the first diffusion sheet 242 in the light-incident portion P2.

The light incident portion pattern 269 may be entirely overlapped with the first diffusion sheet 242 and partially overlapped with the light condensing sheet 243 and the second volcanic sheet 245.

The light-incident portion pattern 269 may be formed on a lower surface of the first diffusion sheet 242 through a printing process.

The light collecting sheet 243 and the second diffusing sheet 245 may be spaced apart from the incident surface 161 of the light guide plate 160 by a predetermined distance as in the liquid crystal display device 10 according to the first embodiment of the present invention .

The liquid crystal display device 10 according to the second embodiment of the present invention has a structure in which the light-incident portion pattern 269 is formed in the first diffusion sheet 242. [

The light diffusing portion pattern 269 is formed on the lower surface of the first diffusion sheet 242 in the second embodiment of the present invention. As shown in FIG.

The backlight unit 130 of the liquid crystal display device 10 according to the second embodiment may further include a second pad 300.

The second pad 300 may block light emitted from the light emitting diode 150.

The second pad 300 is formed in a space defined by the side surfaces of the panel guide 120, the light emitting diode 150, and the light guide plate 160.

Specifically, one end of the rear surface of the second pad 300 is disposed on the light emitting diode 150, the other end is disposed on an upper surface end of the first diffusion sheet 242, The upper surface of the pad 300 may be attached to the back surface of the panel guide 120.

The second pad 300 blocks the yellow light from the light passing through the mold part surrounding the LED 150, thereby preventing a hot spot and a bright line defect.

Meanwhile, the second pad 300 may be made of an elastic material, and may be fixed between the LED 150 and the panel guide 120 to form an adhesive component on the upper surface and the back surface of the second pad 300, .

As described above, the liquid crystal display device 10 according to the second embodiment of the present invention has a structure in which the light-incident portion P2 has a minimized bezel region that is smaller than or equal to the upper region P1 of the upper case 100 One side of the reflective sheet 170 adjacent to the light emitting diode 150 is spaced from the incident surface 161 of the light guide plate 160 by a certain distance to reduce the light reflected by the light incident portion P2, It has the advantage that it can be improved.

The light diffusing portion pattern 269 is formed on the lower or upper surface of the first diffusion sheet 242 to diffuse light that is refracted between the light guide plate 160 and the optical sheets 240 in the light- The bright line and the hot spot by the spring can be improved.

Therefore, the present invention has an optimized design that can prevent uneven brightness due to a bright line and a hot spot around the light-incoming portion P2 in a structure in which the bezel area is minimized. It has the advantage to be implemented.

7A and 7B are top views of light emitting diodes included in the backlight unit of the liquid crystal display according to the third embodiment, and FIGS. 8 and 9B are sectional views of the liquid crystal display according to the third embodiment of the present invention. Is a sectional view taken along line II-II 'of FIG. 7A, and FIG. 10 is a sectional view taken along line III-III' of the light emitting diode of FIG. 7A.

The backlight unit 130 of the liquid crystal display device 10 according to the third embodiment of the present invention is the same as the first and second embodiments except for the light emitting diode 150. [ Therefore, in describing the third embodiment, the same reference numerals are assigned to the same components as those of the first and second embodiments, and a detailed description thereof will be omitted.

The structure of the light emitting diode 150 will be described with reference to FIGS.

8 and 9, FIG. 8 shows a light emitting diode 150 of one type including one light emitting diode chip 154, and FIG. 9 shows a light emitting diode 150 of two types including two light emitting diode chips 154 And a light emitting diode 150.

6, 8 to 10, the LED 150 of the backlight unit 150 according to the third embodiment includes a cup 151, a lead frame 152, a body 153, A light emitting diode chip 154, a phosphor 155, and a light guide unit 156.

The cup 151 accommodates the lead frame 152 and the lead frame 152 may receive an electrical signal from the outside and provide the lead frame 152 to the LED chip 154. The light emitting diode chip 154 may generate light by receiving an electrical signal from the lead frame 152.

The phosphors 155 can receive phosphorescence and emit phosphorescence.

The light guide unit 156 may transmit light generated from the light emitting diode 150 to the light guide plate 160.

The light guide part 156 may be made of mold water and may be a reflective material.

In particular, the inner surface of the light guide part 156 may be coated with a reflective material to reflect the light emitted from the light emitting diode 150.

The light guide part 156 may be integrally formed with the body part 153 or separately formed and attached to each other.

The light guide part 156 may protrude from an upper area of the body part 153 and may be disposed in a bar edge area of the upper surface of the body part 153.

The light emitting diode 150 may include a lead frame 152 on the cup 151 and a body 153 on the outer surface of the cup 151. The light emitting diode chip 154 may be disposed on the lead frame 152.

A phosphor 155 may be formed in a space formed by the body 153 and an inner space of the light emitting diode 150.

Specifically, the body portion 153 may include a bottom portion 158 and an inclined portion 159 protruding upward in an edge region of the bottom portion 158.

The light emitting diode chip 154 may be disposed on the bottom portion 158 and the inclined portion 159 may be designed to be inclined at a specific angle for improving the luminous flux. The space formed by the bottom portion 158 and the inclined portion 159 may be filled with the phosphors 155.

Although not shown in the drawing, the bottom portion 158 may be formed with an insertion hole through which wiring for electrical connection with the lead frame 152 passes.

The body part 153 may be made of a metal having excellent mechanical properties and excellent heat release characteristics, that is, a thermal conductivity, such as copper, aluminum, iron or a compound thereof.

Examples of the compound for the body portion 153 include a copper alloy aluminum alloy or an iron alloy. A plating layer such as an aluminum plating layer, a silver plating layer, or a gold plating layer may be formed on the surface of the body portion 153 to improve the light reflectance in the visible light wavelength region or the ultraviolet wavelength region.

The body part 153 may be formed of a pure metal material layer, and a plating layer (not shown) may be further formed on the metal material layer to increase the light reflectance in a visible light wavelength range and an ultraviolet wavelength range.

A light guide part 156 may be formed on the upper surface of the body part 153.

The light guide unit 156 may include first and second light guide units 156 and 157.

The first light guide part 156 is formed on the upper and lower sides in the longitudinal direction of the body part 153 and the second light guide part 157 is formed on the right and left sides in the short axis direction of the body part 153 .

The inclined portion 159 may include an inclined surface 251 extending from the bottom portion 158 and a horizontal surface 252 extending from the inclined surface 251. At least one of the first and second light guide sections 156 and 157 may be formed to correspond to the entire area or a partial area of the horizontal plane 252.

The light emitting diode 150 according to the third embodiment may be formed such that the first and second light guide sections 156 and 157 surround the entire upper surface of the body section 153 as shown in FIG. The first light guide portion 156 may be formed only on the lower long side of the body portion 153 as shown in FIG.

The length L5 of the first and second light guide sections 156 and 157 may be less than or equal to the thickness L6 of the upper end of the body section 153. [

11 is a cross-sectional view of a liquid crystal display device according to a third embodiment of the present invention.

The effects of the first and second light guide sections 156 and 157 will be described with reference to Fig.

Referring to the dotted line B in FIG. 11, when light generated from the light emitting diode 150 is emitted, the light may be reflected on the inner surfaces of the first and second light guide portions 156 and 157 and may be directed to the light guide plate 160 .

The light-incident portion pattern 169 described in the first embodiment may be formed on one side of the upper surface of the light guide plate 160 to prevent light leakage, or may be formed on at least one of the upper surface and the lower surface of the first diffusion sheet 242 Lt; / RTI > region. However, in the first embodiment, even when the light-landing portion pattern 169 is deleted, the first and second light-guiding portions 156 and 157 can shield the light source, and the light is guided in the direction of the light- can do.

In the case of deleting the light-incident portion pattern 169, the cost reduction effect can be obtained.

In the case of the backlight unit 130 according to the third embodiment in which the light-incident portion pattern 169 and the first and second light guide portions 156 and 157 are formed at the same time, the effect of blocking light is maximized, This is possible.

Referring to FIG. 11, the light emitted from the light emitting diode 150 is directed to the back surface of the light guide plate 160 with reference to the dotted line C in FIG.

A reflective sheet 170 is disposed on the back surface of the LGP 160. The reflective sheet 170 has a second side surface 171 adjacent to the light emitting diode 150 as described in the first and second embodiments, And may be spaced a certain distance from the incident surface 161 of the light guide plate 160. Thus, the luminance irregularity can be solved.

Meanwhile, the light transmitted in the direction of the region not corresponding to the reflective sheet 170 of the backlight region of the light guide plate 160 is blocked by the first light guide portion 156, and the first light guide portion 156 To the light guide plate 160 while being reflected on the inner surface of the light guide plate 160. That is, the second side surface 171 of the reflective sheet 170 is separated from the incident surface 161 of the light guide plate 160 by a predetermined distance to eliminate luminance unevenness, The light directed to the back surface of the light guide plate 160 is transmitted to the light guide plate 160 through the first light guide unit 156 to increase the luminance and prevent the yellowish phenomenon in which hot spot and yellow color appear can do.

The first light guide part 156 can transmit the light emitted from the light emitting diode 150 and can also remove the light incident part pattern 169 and the second pad 300 according to the requirements of product manufacture So that the cost can be reduced. In addition, light loss that may occur in the light-incident portion 161 of the light guide plate 160 due to deletion of the reflective sheet 170 can be minimized.

12 is a graph showing a viewing angle of a light emitting diode according to an embodiment of the present invention.

Short shaft length of body part: 2.0 mm Long shaft length of body part: 6.4 mm
Width of light guide portion: 6.4 mm, thickness of light guide portion: 0.2 mm No light guide available Case1 Case2 Case3 Case4 Light guide placement ㅡ Four sides apply 2 sides apply Four sides apply 2 sides apply Height of light guide part ㅡ 0.350mm 0.350mm 0.200mm 0.200mm Viewing angle X axis 117 ° 113 ° 117 ° 116 ° 117 ° Y axis 118 ° 110 ° 110 ° 115 ° 115 ° Beam 54.07lm 53.49lm 53.65lm 53.80lm 53.89 lm Input efficiency 84.60% 93.70% 93.00% 89.30% 88.90%

Referring to Table 1 and FIG. 12, a viewing angle and an incident light efficiency according to heights of the first and second light guide portions 156 and 157 will be examined. The viewing angle and the light incident efficiency are examined when the first light guide unit 156 is formed on the body 153 and when the first and second light guide units 156 and 157 are formed on the body 153. [

Optical simulation was performed up to Ref and Case 1 to Case 4 where the first and second light guide portions 156 and 157 were not used.

The viewing angle by the unused Ref. Is 117 ° on the X axis and 118 ° on the Y axis. The luminous flux of the light emitting diode 150 is 54.07 lm and the luminous efficiency is 84.6%.

Case 1 is the viewing angle data of the light emitting diode 150 in which the first and second light guide portions 156 and 157 having a height of 0.350 mm are applied to four sides of the body portion 153.

The X-axis is 113 ° and the Y-axis is 110 °, the luminous flux of the light emitting diode 150 is 53.49 lm, and the luminous efficiency is 93.7%.

The X and Y viewing angles of Ref were decreased and the incident light efficiency was improved by 9.1%.

Case 2 is the viewing angle Data of the light emitting diode 150 applied to the top and bottom surfaces of the body portion 153, with the first light guide portion 156 having a height of 0.350 mm.

The X-axis is 117 °, and the Y-axis is 110 °. The luminous flux of the light-emitting diode 150 is 53.65 lm and the light-incident efficiency is 93.0%.

The Y-axis viewing angle was significantly decreased compared to Ref, and the incident light efficiency was improved by about 8.4%.

Case 3 is the viewing angle data of the light emitting diode 150 in which the first and second light guide portions 156 and 157 having a height of 0.200 mm are applied to the four faces of the body portion 153.

The X-axis is 116 °, and the Y-axis is 115 °. The light-emitting diode 150 has a luminous flux of 53.80 lm and an incident light efficiency of 89.3%.

The X and Y viewing angles were slightly reduced compared to Ref, and the incident light efficiency was improved by about 4.7%.

In Case 4, the first light guide portion 156 having a height of 0.200 mm is the viewing angle Data of the light emitting diode 150 applied to the upper and lower surfaces of the body portion 153.

The X-axis is 117 °, and the Y-axis is 115 °. The luminous flux of the light-emitting diode 150 is 53.89 lm and the light-incident efficiency is 88.9%.

The Y-axis viewing angle was slightly reduced compared to Ref, and the incident light efficiency was improved by about 5.3%.

Light from the light emitting diodes 150 on both sides of the light emitting diode 150 is mixed with the light emitted from the light emitting diodes 150 on both sides in the X axis direction which is the longitudinal direction of the long side of the light emitting diode 150 from the viewpoint of the uniform light- And it is preferable that the light does not leak over the light guide plate 160 and downward in the Y axis direction which is the short side length direction of the light emitting diode 150.

From this point of view, cases 1 and 3 in which the first and second light guide sections 156 and 157 are applied to all four sides (upper, lower, left, right) of the body section 153 are optimal Case.

On the other hand, in Case 1 and Case 3, as can be seen from the viewing angle data shown in Table 1 and FIG. 10, light spreading in the X-axis direction is cut off to generate a hot spot between the light emitting diode 150 and the light emitting diode 150 have.

In this respect, the optimal case can be an optimal structure for Case 2 in which the first light guide portion 56 is applied to the upper and lower portions of the body portion 153. However, the present invention is not limited thereto. The light emitting diode 150 having the structure of Case 4 can be applied according to the length of the light emitting diode 150 to the incident surface 161 of the light guide plate 160.

The light is guided to the upper portion of the light guide plate 160 by the light guide portion 156 provided on the upper side of the light emitting diode 150 included in the backlight unit 130 of the liquid crystal display device 10 according to the fourth embodiment of the present invention. And light is reflected by the light guide part 156 to be incident into the light guide plate 160.

As a result, light leaking to the upper portion of the light guide plate 160 is remarkably reduced, thereby improving the hypocrite level and increasing the light incident efficiency.

When the density of the pattern formed on the back surface of the light guide plate 160 is designed to be low in the light incident portion, the light passes through the light guide plate 160 and is reflected by the reflection sheet 170 by the low- And can be strongly emitted upward.

These lights can be viewed at the front of the backlight unit 130 as a hot spot. The light incident into the light guide plate 160 by the light guide part 156 provided below the light emitting diode 150 is changed in total internal reflection angle so that the light guide plate 160 So that the ratio of light output to the upper side is lowered, thereby preventing hot spots from being generated.

13 is a light emitting diode of a liquid crystal display according to a fourth embodiment of the present invention.

Referring to FIG. 13, the liquid crystal display 10 according to the fourth embodiment of the present invention may include a light emitting diode 150 having a gradient shape.

In the description of the fourth embodiment, the same function and the same shape as those of the first to third embodiments are denoted by the same reference numerals, and detailed description is omitted.

The light emitting diode 150 may include a body portion 153 and a light guide portion 156 formed on the upper surface of the body portion 153.

The light guide part 156 may be integrally formed with the body part 153 or separately formed and attached to each other.

The body portion 153 of the light emitting diode 150 according to the fourth embodiment and the light guide portion 156 may be integrally formed in a gradient shape.

Specifically, the light guide part 156 may have a shape in which its width becomes narrower from the body part 153 toward the light guide part 156.

When the body part 153 and the light guide part 156 have a gradient shape, there is an effect of preventing cracks or the like from being damaged due to external factors such as vibration, impact and heat.

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.

10. Liquid crystal display
110. Liquid crystal display panel
111. Transistor substrate
113. Color filter substrate
115. Driven PCB
117. COF
120. Panel Guide
121. The first pad
140, 240. Optical sheets
141. First side of optical sheets
142, 242. First diffusion sheet
143, 243. Condenser sheet
145, 245. Second diffusion sheet
150. Light emitting diodes
151. Cup
152. Lead frame
153. Body portion
154. Light Emitting Diode Chip
155. Phosphor
156. First light guide portion
157. Second light guide portion
158. Bottom
159. Inclined part
160. A light guide plate
161. Incident face of the light guide plate
167. Lower surface of light guide plate
167a. Non-patterned area
167b. Pattern area
169, 269. The pattern of the light-
170. Reflective sheet
171. A reflector according to claim 1,
180. Bottom cover
191. Lower case
251. Slope of inclined portion
252. Horizontal plane of the slope
300. The second pad
L1. First width
L2. Second width
L3. Distance from the starting point of the pattern area to the end of the panel guide
L4. The distance from the light emitting surface of the light emitting diode to the end of the panel guide
L5. The thickness of the light guide portion
L6. Thickness at the top of the body
P1: upper region
P2:
P3: first region
P4: Width of the light-incoming part pattern
P5:
P6: Non-patterned area

Claims (20)

A body portion including a bottom portion;
A light emitting diode chip disposed on the bottom portion;
A phosphor formed on the bottom portion; And
And a light guide portion formed on an upper surface of the body portion. The method according to claim 1,
And the light guide portion is disposed above and below the body portion. The method according to claim 1,
And the light guide portion is disposed on the upper side, the lower side, the left side, and the right side of the body portion. The method according to claim 1,
Wherein the light guide portion has a bar shape. The method according to claim 1,
Wherein the body portion and the light guide portion have a gradient shape. The method according to claim 1,
The body portion may further include an inclined portion,
Wherein the inclined portion includes an inclined surface connected to the bottom portion and a horizontal surface connected to the inclined surface,
And the light guide portion is disposed on the horizontal plane. The method according to claim 2 or 3,
Wherein the light guide part is formed integrally with the body part. A light emitting diode according to claim 1;
A light guide plate disposed in parallel with the light emitting diodes;
Optical sheets disposed on the light guide plate; And
And a reflective sheet disposed under the light guide plate. 9. The method of claim 8,
Wherein the light guiding portion is formed on an upper surface of the body portion in a region corresponding to an upper surface and a lower surface of the light guide plate, respectively. 9. The method of claim 8,
Wherein the optical sheets include a diffusion sheet disposed on an upper surface of the light guide plate,
Wherein at least one of the lower surface and the upper surface of the diffusion sheet has a light-incoming portion pattern for reflecting light emitted from the light-emitting diode. 11. The method of claim 10,
Wherein the light-incident portion pattern is formed in an edge region of the diffusion sheet corresponding to an incident surface of the light guide plate. 9. The method of claim 8,
And a light-incoming portion pattern that reflects light emitted from the light-emitting diode in an area corresponding to an incident surface of the light guide plate among the upper regions of the light guide plate. 13. The method of claim 12,
Wherein the optical sheets are overlapped with a part of the light-incoming portion pattern. 14. The method of claim 13,
Wherein an end of the optical sheets facing the light emitting diode is located at the center of the light-incoming portion pattern. 9. The method of claim 8,
Wherein the backlight unit further comprises a pad,
Wherein one side of the back surface of the pad is disposed on the light emitting diode and the other side is disposed on the upper surface of the light guide plate. 9. The method of claim 8,
Wherein the reflective sheet is disposed in an area of an edge area of the back surface of the light guide plate excluding an edge area on an incident surface side of the light guide plate. 17. The method of claim 16,
Wherein an end of the reflective sheet facing the light emitting diode is closer to the incident surface than an end of the optical sheets facing the light emitting diode. A liquid crystal display panel;
A panel guide for supporting a lower edge of the liquid crystal display panel;
The upper edge of the liquid crystal display panel is guided by an upper case; And
A backlight unit comprising: a light emitting diode according to claim 1; a light guide plate disposed in parallel with the light emitting diode; optical sheets disposed on the light guide plate; and a backlight unit including a reflective sheet disposed under the light guide plate,
A light guide plate pattern for reflecting light is formed in a bottom region of the light guide plate,
Wherein the light guide plate pattern is formed in a direction toward the inside of the light guide plate in a bottom region of the light guide plate corresponding to the backside region of the inner end of the panel guide. 19. The method of claim 18,
Wherein a difference between a distance from a starting point of the light guide plate pattern to an end of the panel guide and a distance from an emitting surface of the light emitting diode to an end of the panel guide is 0.5 mm or less. 19. The method of claim 18,
Wherein the backlight unit further comprises a pad which is emitted from the light emitting diode and blocks light directed upward in the backlight unit,
Wherein the pad is formed in a space defined by a side surface of the panel guide, the light emitting diode, and the light guide plate.
KR20130103103A 2013-08-29 2013-08-29 Backlight unit comprising light emitting diode and liquid crystal display device the same KR20150025404A (en)

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Application Number Priority Date Filing Date Title
KR20130103103A KR20150025404A (en) 2013-08-29 2013-08-29 Backlight unit comprising light emitting diode and liquid crystal display device the same

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018038440A1 (en) * 2016-08-26 2018-03-01 Lg Electronics Inc. Back light unit and display device including the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018038440A1 (en) * 2016-08-26 2018-03-01 Lg Electronics Inc. Back light unit and display device including the same
US10302852B2 (en) 2016-08-26 2019-05-28 Lg Electronics Inc. Back light unit and display device including the same

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