KR20130033740A - Light source unit, backlgiht unit and liquid crystal display device the same - Google Patents

Light source unit, backlgiht unit and liquid crystal display device the same Download PDF

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Publication number
KR20130033740A
KR20130033740A KR1020110097605A KR20110097605A KR20130033740A KR 20130033740 A KR20130033740 A KR 20130033740A KR 1020110097605 A KR1020110097605 A KR 1020110097605A KR 20110097605 A KR20110097605 A KR 20110097605A KR 20130033740 A KR20130033740 A KR 20130033740A
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KR
South Korea
Prior art keywords
light
light emitting
cone
emitting chip
unit
Prior art date
Application number
KR1020110097605A
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Korean (ko)
Inventor
정낙윤
장승호
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엘지디스플레이 주식회사
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Priority to KR1020110097605A priority Critical patent/KR20130033740A/en
Publication of KR20130033740A publication Critical patent/KR20130033740A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/69—Details of refractors forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/046—Refractors for light sources of lens shape the lens having a rotationally symmetrical shape about an axis for transmitting light in a direction mainly perpendicular to this axis, e.g. ring or annular lens with light source disposed inside the ring
    • 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
    • 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
    • H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
    • H01L33/502—Wavelength conversion materials
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

The present invention discloses a light source unit that can improve light efficiency as well as implement uniform brightness.
The disclosed light source unit includes a light emitting chip that emits light, a fluorescent layer provided on the light emitting chip, and an optical refraction portion that has an inverted cone-shaped groove structure on the fluorescent layer and laterally refracts the light from the light emitting chip. Include.

Description

LIGHT SOURCE UNIT, BACKLGIHT UNIT AND LIQUID CRYSTAL DISPLAY DEVICE THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source unit, and to a light source unit, a backlight unit, and a liquid crystal display device having the same, which can not only improve light efficiency but also realize uniform brightness.

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

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

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

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

The edge type backlight unit has a structure in which light from a light source disposed on the side surface is converted into surface light using a light guide plate and provided to the liquid crystal display panel.

The direct backlight unit has a structure in which a plurality of light sources are disposed below the liquid crystal display panel to provide light directly under the liquid crystal display panel.

In general, a direct backlight unit uses a lamp or a light emitting diode as a light source.

Recently, a light emitting diode which is advantageous for low power consumption and thinning is mainly used.

A general direct type backlight unit has a structure in which a plurality of light emitting diodes are arranged directly under a liquid crystal display panel. There is a problem in that a luminance difference occurs between a region where the light emitting diode is disposed and a region where the light emitting diode is not disposed.

The difference in luminance as described above may be improved by forming a lens for diffusing light in each of the light emitting diodes, but the light may be deteriorated due to the loss of light from the light emitting diode due to the lens configuration. There was a limit to improving the car.

In addition, the general direct backlight unit has a problem in that a large number of light emitting diodes should be provided in the unit backlight unit due to the decrease in efficiency of the light emitting diode including the lens.

An object of the present invention is to provide a light source unit, a backlight unit, and a liquid crystal display device having the same, which can not only improve light efficiency but also realize uniform luminance.

Light source unit according to an embodiment of the present invention,

Light emitting chip for emitting light; A fluorescent layer provided on the light emitting chip; And an optical refraction portion having an inverted conical groove structure on the fluorescent layer and refracting light from the light emitting chip laterally.

Backlight unit according to another embodiment of the present invention,

A bottom cover with an upper surface opened; And a light emitting chip disposed on the bottom cover to emit light, a fluorescent layer provided on the light emitting chip, and an inverted conical groove structure on the fluorescent layer, and refracting light from the light emitting chip laterally. And a plurality of light source units having light refracting portions.

According to another embodiment of the present invention,

A bottom cover with an upper surface opened; A light emitting chip disposed on the bottom cover to emit light; A plurality of light source units having light refractions; And a liquid crystal display panel disposed on the light source unit.

The liquid crystal display according to the exemplary embodiment of the present invention has an inverted cone shape and an optical refraction portion in which a refractive material is formed is provided on the fluorescent layer, thereby improving light efficiency and directing angle by removing a lens as compared to a general light emitting diode. It is possible to improve the luminance difference between the region where the light emitting diode is disposed and the region where the LED is not disposed due to expansion.

In addition, the present invention has an advantage of realizing a slimmer by reducing the distance between the light emitting diode, the diffusion plate and the optical sheet by the extended orientation angle of the light emitting diode, it is possible to reduce the number of light emitting diodes by improving the light efficiency, and to eliminate the lens It has the advantage of reducing the manufacturing cost.

1 is an exploded perspective view illustrating a liquid crystal display device having a backlight unit of a direct type according to an embodiment of the present invention.
2 is a cross-sectional view illustrating a liquid crystal display device taken along the line II ′.
3 is a cross-sectional view showing a light emitting diode according to an embodiment of the present invention.
4 is a perspective view illustrating the light refraction unit of FIG. 3.
5 is a cross-sectional view showing the diameter of the light refracting portion and the emission surface and the height of the light refracting portion of the light emitting diode according to the exemplary embodiment of the present invention.
6 is a cross-sectional view of a general light emitting diode and the light emitting diode of the present invention.
FIG. 7 is a view simulating the direction angles of the general light emitting diode of FIG. 6 and the light emitting diode of the present invention. FIG.

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

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

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

As shown in FIG. 1 and FIG. 2, the liquid crystal display of the present invention includes a liquid crystal display panel 110 in which an image is displayed and a backlight unit 120 disposed under the liquid crystal display panel 110 to provide light. And a panel guide 100 supporting the lower edge of the liquid crystal display panel 110.

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

Although not shown in detail in the drawings, the thin film transistor substrate and the color filter substrate will be described in detail. In the thin film transistor substrate, a plurality of gate lines and data lines cross each other to define pixels, and thin film transistors (TFTs) are formed at respective crossing regions. a thin film transistor) is provided and is connected in a one-to-one correspondence with the pixel electrode mounted on each pixel. The color filter substrate includes a color filter of R, G, and B colors corresponding to each pixel, and a black matrix bordering each of the color filters and covering a gate line, a data line, and a thin film transistor.

The edge of the liquid crystal display panel 110 includes a gate driving PCB 112 for supplying a driving signal to a gate line, and a data driving PCB 112 for supplying a driving signal to a data line. The gate driving PCB 112 may not be configured on a separate PCB, but may be formed on a thin film transistor substrate.

The gate and data driving PCBs 112 and 113 are electrically connected to the liquid crystal display panel 110 by a chip on film (COF). Here, the COF may be changed to a TCP (Tape Carrier Package).

The backlight unit 120 disposed below the liquid crystal display panel 110 may include a bottom cover 180 having an upper surface opened and a plurality of printed circuit boards disposed at regular intervals provided on the bottom cover 180. 150, a plurality of light emitting diodes 160 mounted on the printed circuit board 150, holes are formed to expose the light emitting diodes 160, and light from the light emitting diodes 160 is displayed on the liquid crystal display. A reflective sheet 170 reflecting toward the panel 110, a diffusion plate 131 disposed on the light emitting diode 160 to diffuse light, and optical sheets disposed on the diffusion plate 131. 130).

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

The light emitting diode 160 includes a light refracting part (not shown) that refracts vertically traveling light.

The light emitting diode 160 according to an embodiment of the present invention will be described in detail with reference to FIGS. 3 and 4.

3 is a cross-sectional view showing a light emitting diode according to an embodiment of the present invention, FIG. 4 is a perspective view showing the light refraction unit of FIG. 3, and FIG. 5 is a light refraction unit of the light emitting diode according to an embodiment of the present invention. And sectional view showing the diameter of the light exit surface and the height of the light refracting portion.

3 to 5, a light emitting diode according to an embodiment of the present invention includes a light emitting chip 165 for emitting light, a package main body 161 for reducing loss of emitted light, and the light emitting chip. And a first lead frame 162 on which 165 is mounted, and a second lead frame 164 provided on one side of the first lead frame 162.

The light emitting diode further includes a fluorescent layer 168 on the light emitting chip 165 to change the blue light of the light emitting chip 165 into white light.

The fluorescent layer 168 may have a form in which a fluorescent material is mixed with silicon, and the fluorescent material may be a yellow fluorescent material.

The package body 161 is made of a plastic resin structure having a groove portion of a predetermined size.

The first lead frame 162 has inclined surfaces that are symmetrical to each other, and a first driving voltage for driving the light emitting chip 165 is supplied.

The second lead frame 164 is separated from the first lead frame 162 by a predetermined interval.

The second lead frame 164 is supplied with a second driving voltage for driving the light emitting chip 165.

The first and second driving voltages may have different voltage levels or voltages having different polarities.

The light emitting chip 165 generates a small number of carriers (electrons or holes) injected using a pn junction structure of a semiconductor, and emits light by recombination thereof. The light emitting chip 165 includes a first metal made of a metal material. The first lead frame 162 is electrically connected to each other through a wire 166, and the second lead frame 164 is electrically connected to a second metal wire 167 made of a metal material.

In the light emitting diode of the present invention, the light refraction unit 200 is provided in the fluorescent layer 168.

The light refracting unit 200 may be formed in an inverted cone shape.

That is, the light refracting unit 200 may have an inverted conical groove structure on the fluorescent layer 168.

In detail, the optical refraction unit 200 may have a groove in which a central portion of the fluorescent layer 168 is removed in an inverted cone shape, and may be formed when the fluorescent layer 168 is manufactured.

A refractive material may be formed in the optical refraction unit 200.

The refractive material may reflect a portion of the light and transmit a portion of the light.

The refractive material may be any one or two or more of TiO 2, SiO 2, Al 2 O 3, MgO, BaO, and Ag.

The light refracting unit 200 overlaps the light emitting chip 165 and has a function of laterally refracting light vertically straight from the light emitting chip 165.

The optical refraction portion 200 has a cylindrical diameter r1 of a constant cone and a cone height h defined by the distance between the cylinder's cone and the vertex.

The angle of inclination of the inclined side is determined by the cylindrical diameter r1 and the cone height h, and the light refracting portion 200 refracts the light from the light emitting chip 165 laterally by the inclined side. do.

The ratio of the cylinder diameter r1 and the cone height h may be designed to be 2: 1 to 6: 1.

The ratio of the cylinder diameter r1 and the exit surface diameter r2 of the light emitting diode may be designed to be 1: 3 to 1: 1.

Here, the exit surface diameter r2 may be defined as the diameter of the groove of a predetermined size of the package body 161.

In the exemplary embodiment of the present invention, the structure of the package in which the light emitting chip 165 is mounted inside the package body 161 is limited. However, the present invention is not limited thereto, and the light emitting chip is directly bonded onto the printed circuit board. Flip chip structure can be applied. The flip chip structure is a structure in which a fluorescent layer is formed on a light emitting chip without the package body 161 and an electrode is exposed below.

The liquid crystal display according to the exemplary embodiment of the present invention described above has an inverted cone shape and a light refraction portion 200 having a refractive material formed thereon is provided on the fluorescent layer 168 in comparison with a general light emitting diode. It is possible to improve the luminance difference between the region where the light emitting diode is disposed and the region where the light emitting diode is not disposed due to the improvement of the light efficiency by the lens deletion and the extension of the directivity angle.

In addition, the present invention has an advantage of realizing a slimmer by reducing the distance between the light emitting diode, the diffusion plate and the optical sheet by the extended orientation angle of the light emitting diode, it is possible to reduce the number of light emitting diodes by improving the light efficiency, and to eliminate the lens It has the advantage of reducing the manufacturing cost.

FIG. 6 is a cross-sectional view of a general light emitting diode and a light emitting diode of the present invention, and FIG. 7 is a view illustrating a direction angle between the general light emitting diode of FIG. 6 and the light emitting diode of the present invention.

6 and 7, a general light emitting diode has a structure in which a light refraction unit is omitted, and a light emitting diode of the present invention has a structure including a light refraction unit.

The simulated general light emitting diode and the light emitting diode of the present invention have a diameter of the exit surface of 3.0 mm, a height of 3.0 mm and a diameter of the light emitting chip of 1.0 mm.

In addition, the optical refraction portion of the present invention is designed with a cylinder diameter of 1.0mm to 3.0mm, the cone height is designed to 0.5mm.

A general light emitting diode has a narrow directivity, and most of the light is concentrated at the center of the light emitting chip. The light emitting diode of the present invention has a light concentrated at the center of the light emitting chip at 55% or less, and has a direct angle of 130 to 165 degrees.

Accordingly, the light emitting diode of the present invention can improve the luminance difference between the region where the light emitting diode is disposed and the region where the light emitting diode is not disposed due to the extension of the directivity angle, and the number of light emitting diodes can be reduced by improving the light efficiency by removing the lens.

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.

160: light emitting diode 161: package body
165: light emitting chip 168: fluorescent layer
200: optical refraction

Claims (15)

Light emitting chip for emitting light;
A fluorescent layer provided on the light emitting chip; And
And a light refracting portion having an inverted conical groove structure on the fluorescent layer and refracting light from the light emitting chip laterally. The method according to claim 1,
The light refracting unit reflects a part of light and transmits one or more of TiO 2, SiO 2, Al 2 O 3, MgO, BaO, Ag, or a mixture of two or more light sources. The method according to claim 1,
The light refracting unit includes a cone diameter defined by a cylinder diameter of a cone of a predetermined range and a distance between a cylinder and a vertex of the cone. The method of claim 3,
And the cylindrical diameter and the cone height have a ratio of 2: 1 to 6: 1. The method of claim 3,
And the cylinder diameter and the emission surface of the light source unit have a ratio of 1: 3 to 1: 1. A bottom cover with an upper surface opened; And
A light emitting chip disposed on the bottom cover to emit light, a fluorescent layer provided on the light emitting chip, and an inverted conical groove structure formed on the fluorescent layer, and configured to refract light from the light emitting chip laterally; A backlight unit comprising a plurality of light source units having a light refracting portion. The method of claim 6,
The light refracting unit reflects a part of light and transmits another part of the backlight unit in which one or two or more of TiO 2, SiO 2, Al 2 O 3, MgO, BaO, Ag are mixed. The method of claim 6,
The optical refraction unit includes a cone diameter defined by a cylinder diameter of a cone and a distance between a cone and a vertex of a cone of a predetermined range. The method of claim 8,
The cylinder diameter and the cone height has a ratio of 2: 1 to 6: 1. The method of claim 8,
And a cylinder diameter and an exit surface of the light source unit have a ratio of 1: 3 to 1: 1. A bottom cover with an upper surface opened;
A light emitting chip disposed on the bottom cover to emit light; A plurality of light source units having light refractions; And
And a liquid crystal display panel disposed on the light source unit. 12. The method of claim 11,
The optical refraction unit reflects a part of light and transmits another part of any one or two or more of TiO 2, SiO 2, Al 2 O 3, MgO, BaO, and Ag. 12. The method of claim 11,
And the optical refraction portion comprises a cone diameter defined by a cylinder diameter of a cone in a predetermined range and a distance between a cylinder and a vertex of the cone. The method of claim 13,
The cylindrical diameter and the cone height has a ratio of 2: 1 to 6: 1. The method of claim 13,
And the cylinder diameter and the exit surface of the light source unit have a ratio of 1: 3 to 1: 1.
KR1020110097605A 2011-09-27 2011-09-27 Light source unit, backlgiht unit and liquid crystal display device the same KR20130033740A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9929320B2 (en) 2014-12-18 2018-03-27 Samsung Electronics Co., Ltd. Wavelength conversion film and light emitting device package including the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9929320B2 (en) 2014-12-18 2018-03-27 Samsung Electronics Co., Ltd. Wavelength conversion film and light emitting device package including the same

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