KR20130055223A - Light source module and backlight unit - Google Patents

Light source module and backlight unit Download PDF

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Publication number
KR20130055223A
KR20130055223A KR1020110120869A KR20110120869A KR20130055223A KR 20130055223 A KR20130055223 A KR 20130055223A KR 1020110120869 A KR1020110120869 A KR 1020110120869A KR 20110120869 A KR20110120869 A KR 20110120869A KR 20130055223 A KR20130055223 A KR 20130055223A
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South Korea
Prior art keywords
light
light source
disposed
color
quantum dot
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KR1020110120869A
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Korean (ko)
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장규호
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삼성전자주식회사
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Priority to KR1020110120869A priority Critical patent/KR20130055223A/en
Publication of KR20130055223A publication Critical patent/KR20130055223A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
    • H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/02—Semiconductor devices having potential barriers 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 bodies
    • H01L33/04—Semiconductor devices having potential barriers 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 bodies with a quantum effect structure or superlattice, e.g. tunnel junction
    • H01L33/06—Semiconductor devices having potential barriers 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 bodies with a quantum effect structure or superlattice, e.g. tunnel junction within the light emitting region, e.g. quantum confinement structure or tunnel barrier
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers 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 having potential barriers 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 having potential barriers 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 having potential barriers 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers 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 having potential barriers 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
    • H01L33/52—Encapsulations

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

Abstract

The present invention relates to a light source module and a backlight unit, and an aspect of the present invention includes a substrate and a quantum dot arranged on the substrate, the light emitting device and a quantum dot disposed on an optical path of the light emitting device and emitting a first color. At least one first light source and at least one second light source arranged on the substrate, the light emitting device and at least one second light source including a quantum dot disposed on an optical path of the light emitting device and emitting a second color different from the first color. It provides a light source module.
According to an embodiment of the present invention, even when the quantum dot is provided, the reliability is improved, and in particular, a light source module having a minimum deterioration of color characteristics may be obtained.

Description

Light Modules and Backlight Units {LIGHT SOURCE MODULE AND BACKLIGHT UNIT}

The present invention relates to a light source module and a backlight unit.

A light emitting diode (LED), which is one type of semiconductor light emitting device, is a semiconductor device capable of generating light of various colors due to recombination of electrons and holes at a junction portion of p and n type semiconductors when an electric current is applied. Such a light emitting diode has been continuously increasing in demand because it has many advantages such as a long lifetime, a low power supply, an excellent initial driving characteristic, and a high vibration resistance as compared with a light emitting device based on a filament. Particularly, in recent years, a group III nitride semiconductor capable of emitting light in a short wavelength range of a blue series has been spotlighted.

Meanwhile, in the case of a light source module used in an LCD backlight unit, a cold cathode fluorescent lamp (CCFL) is conventionally used, but since CCFL uses mercury gas, it may cause environmental pollution, and the response speed is slow. In addition to low color reproducibility, it has disadvantages that are not suitable for light and small size reduction of LCD panels. On the other hand, the light emitting diodes are environmentally friendly, can respond to high speeds of several nanoseconds, and are effective in video signal streams, enabling impulsive driving, 100% or more color reproduction, and red, green, and blue light emitting diodes. In addition, the brightness, color temperature, and the like can be arbitrarily changed by adjusting the amount of light, and since they have advantages that are suitable for light and small size reduction of the LCD panel, the situation has been actively adopted as a light source module for a backlight.

The light source module used in the backlight unit may include a material such as a phosphor or a quantum dot capable of converting the wavelength of light emitted from the light emitting device so as to emit white light. Among them, the quantum dots are nanocrystals of semiconductor materials having a diameter of about 10 nm or less, and have a quantum confinement effect. The quantum dots generate light stronger than a normal phosphor in a narrow wavelength band. The emission of quantum dots is generated by the transition of electrons excited by the valence band in the conduction band. Even in the same material, the wavelength varies depending on the particle size. Therefore, as the size of the quantum dot decreases, light of short wavelength is emitted, so that light of a desired wavelength range can be obtained by adjusting the size.

However, in spite of such usefulness, the quantum dot is a material having low stability and has a problem in that luminous efficiency is significantly reduced when not properly dispersed in an encapsulant or when exposed to oxygen or moisture. In addition, when driving by applying a quantum dot to the device, there may occur a problem that the characteristics deteriorate over time, in particular, the color coordinates change.

One of the objects of the present invention is to provide a light source module with improved reliability even when the quantum dot is provided, in particular, the degradation of color characteristics is minimized.

Yet another object of the present invention is to provide a backlight unit having the light source module.

It should be understood, however, that the scope of the present invention is not limited thereto and that the objects and effects which can be understood from the solution means and the embodiments of the problems described below are also included therein.

According to an aspect of the present invention,

At least one first light source arranged on the substrate, the light source including at least one light source and a quantum dot disposed on an optical path of the light emitting device and emitting a first color; A light source module including at least one second light source disposed on an optical path of a light emitting device and including a quantum dot emitting a second color different from the first color.

In one embodiment of the present invention, each of the first and second light sources may be disposed on an optical path of the light emitting device, and may include a wavelength conversion unit having quantum dots emitting the first and second colors, respectively. .

In this case, each of the wavelength conversion parts included in the first and second light sources may have an encapsulant sealing the quantum dot.

In this case, the quantum dots included in each of the first and second light sources may be separated from each other by the encapsulant.

In addition, at least one of the first and second light sources may include a cup-shaped package body in which the light emitting device is disposed, and the quantum dots may be dispersed in a cup of the package body.

In addition, at least one of the first and second light sources may be disposed to be spaced apart from the light emitting device.

In one embodiment of the present invention, the first color may be red, and the second color may be green.

In one embodiment of the present invention, the first color may be magenta, and the second color may be cyan.

In this case, the light emitting devices included in the first and second light sources may emit blue light.

In one embodiment of the present invention, the substrate has a bar shape, and the first and second light sources may be arranged in the longitudinal direction of the substrate.

In one embodiment of the present invention, at least one of the first and second light sources may include only one type of quantum dot.

In one embodiment of the present invention, a plurality of first and second light sources may be provided and alternately arranged.

On the other hand, another aspect of the present invention,

A light guide plate and a quantum dot disposed on at least one side of the light guide plate, the substrate and the quantum dots disposed on the substrate to emit light toward the light guide plate and disposed on the light emitting element and the optical path of the light emitting element and emit a first color. At least one first light source, and a quantum dot disposed on the substrate to emit light toward the light guide plate and disposed on a light emitting element and an optical path of the light emitting element and emitting a second color different from the first color It provides a backlight unit including a light source module including at least one second light source including a.

According to another aspect of the present invention,

A light guide plate, disposed on at least one side of the light guide plate, disposed on the substrate and the substrate to emit light toward the light guide plate, disposed on a light emitting element and an optical path of the light emitting element, and emitting a first color; A first light source module including at least one first light source including a quantum dot and disposed on the other side of the light guide plate, disposed on the substrate and the substrate to emit light toward the light guide plate, the light emitting device and the light emitting device And a second light source module including at least one second light source disposed on an optical path of the light source and including at least one second light source including quantum dots emitting a second color different from the first color.

In one embodiment of the present invention, the light guide plate may further include a diffusion sheet and a prism sheet.

In one embodiment of the present invention, the first and second light sources may include only quantum dots that emit the first and second colors, respectively.

According to an embodiment of the present invention, even when the quantum dot is provided, the reliability is improved, and in particular, a light source module having a minimum deterioration of color characteristics may be obtained. In addition, a backlight unit having the above light source module can be obtained.

However, the effect obtained from the present invention is not limited to this, and even if not explicitly mentioned, the object or effect which can be grasped from the solution means or the embodiment of the task described below is also included therein.

1 and 2 are cross-sectional views and perspective views schematically showing a light source module according to an embodiment of the present invention, respectively.
3 and 4 are cross-sectional views schematically illustrating examples of light sources that may be included in the light source module of FIG. 1.
5 and 6 are plan views schematically showing a backlight unit according to another aspect of the present invention, respectively.
FIG. 7 is a schematic cross-sectional view of the backlight unit of FIG. 6.
8 and 9 are graphs showing the degree of change in color coordinates according to the driving time of the light source in the comparative example and the embodiment of the present invention, respectively.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. It is to be understood that both the foregoing general description and the following detailed description are exemplary, explanatory and are intended to provide further explanation of the invention, and are not intended to be exhaustive or to limit the invention to the precise forms disclosed. . Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

1 and 2 are cross-sectional views and perspective views schematically showing a light source module according to an embodiment of the present invention, respectively. 3 and 4 are cross-sectional views schematically illustrating examples of light sources that may be included in the light source module of FIG. 1.

First, referring to FIG. 1 and FIG. 2, the light source module 100 according to the present embodiment has a structure including a substrate 101, a first light source 102, and a second light source 103. The substrate 101 may have a shape extending in one direction (that is, a longitudinal direction), that is, a bar shape, and a circuit board used in the art, for example, a PCB, an MCPCB, an MPCB, an FPCB, or the like. Can be used. In this case, the substrate 101 includes a wiring pattern (not shown) on the surface, the inside thereof, and the like, and the wiring pattern is electrically connected to the light emitting devices provided in the first and second light sources 102 and 103. In addition, although not shown, to exchange electrical signals with the outside, one or more connectors may be formed on the substrate 101.

The first light source 102 and the second light source 103 are arranged on the substrate 101, and both emit light by the quantum dots, but the quantum dots provided in the first light source 102 and the second light source 103 are mutually Emits a different color That is, as shown in FIG. 2, the first light source 102 and the second light source 103 may include light emitting units 102a and 103a and wavelength converting units 102b and 103b, respectively, where the wavelength The conversion units 102b and 103b may be provided with quantum dots for converting wavelengths of light emitted from the light emitting units 102a and 103a. The first light source 102 and the second light source 103 have quantum dots of different colors. This is to be provided.

The light emitting units 102a and 103a are elements that emit light when an electric signal is applied, and the wavelength converting units 102b and 103b may employ any structure including quantum dots. Explain the example. First, as shown in FIG. 3, the light source 102 ′ may be provided in a package form. The light source 102 ′ may include a cup-shaped package body 110 and first and second lead frames 111 and 112, and the light emitting element 113 may be disposed inside the reflective cup of the package body 110. have. In addition, the light emitting device 113 may be disposed on the first lead frame 111 and may be connected to the second lead frame 112 by a wire W, but the lead frames 111 and 112 and the light emitting device ( The connection method of 113 may be variously modified. An encapsulant 114 made of silicon, an epoxy resin, or the like may be filled in the reflective cup of the package body 110 to protect the light emitting device 113 and the wire W, and the encapsulant 114 may include a quantum dot 115. This is distributed. That is, the wavelength converter may be viewed as a structure including the encapsulant 114 and the quantum dots 115 dispersed therein.

Next, referring to the example of FIG. 4, there is a difference only in the configuration of the wavelength conversion part, and the light source 102 ″ is a structure in which the quantum dot 115 is enclosed in the sealing member 117, whereby the quantum dot 115 is The light emitting device 113 is spaced apart from the light emitting device 113. In this case, the quantum dots 115 may be dispersed in a form naturally coordinated with the dispersion medium 116. The dispersion medium 116 may be used as long as it is a transparent medium that does not affect the wavelength conversion performance of the quantum dot 115, is not changed by light or reflects light, and does not cause light absorption. For example, the organic solvent may include at least one of toluene, chloroform, and ethanol, and the polymer resin may be epoxy, silicon, polysthylene, and It may include at least one of acrylates. In addition, the sealing member 117 may be made of a polymer material of glass or transparent material suitable for protecting the quantum dot 115 from an external environment such as oxygen or moisture.

In the case of the quantum dot 115 used in the present embodiment, it is a nanocrystal of a semiconductor material having a diameter of about 1 to 10 nm, and has a quantum limiting effect. Examples of the quantum dots include Si-based nanocrystals, II-VI-based compound semiconductor nanocrystals, III-V-based compound semiconductor nanocrystals, IV-VI-based compound semiconductor nanocrystals, and the like. , 103), one type of quantum dot 115 is used.

Looking at the quantum dot 115 material in more detail, the group II-VI-based compound semiconductor nanocrystal is, for example, CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe a, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HggZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe and HgZnSTe one selected from the group consisting of It can be one. Group III-V compound semiconductor nanocrystals are, for example, GaN, GaP, GaAs, AlN, AlP, AlAs, InN, InP, InAs, GaNP, GaNAs, GaPAs, AlNP, AlNAs, AlPAs, InNP, InNAs, InPAs, GaAlNP, GaAlNAs, GaAlPAs, GaInNPs, GaInNAs, GaInPAs, InAlNPs, InAlNAs, and InAlPAs can be any one selected from the group consisting of. Group IV-VI compound semiconductor nanocrystals can be, for example, SbTe.

On the other hand, the light emission of the quantum dot 115 is generated as the electrons in the excited state transitions in the conduction band, and even in the case of the same material, the wavelength varies depending on the particle size. As the size of the quantum dot 115 decreases, light of a desired wavelength region may be obtained by adjusting the size of the quantum dot to emit light having a short wavelength. The size of the quantum dot 115 can be adjusted by appropriately changing the growth conditions of the nanocrystals.

In relation to the color of light emitted from the quantum dot 115, first, the light emitting device 113 provided in the light source may emit blue light, and specifically, may emit light having a main wavelength of about 435 nm to 470 nm. have. In this case, the quantum dot 115 included in the first light source 102 may emit light of the blue light having a peak wavelength of about 580 nm to about 660 nm. In addition, the quantum dot 115 included in the second light source 103 may emit light having a wavelength different from that emitted by the first light source 102, for example, a peak wavelength of about 500 to 550 nm. . That is, in the present embodiment, the quantum dot 115 included in the first and second light sources 102 and 103 emits light having different wavelengths, and furthermore, each light source 102 or 103 may be of one kind. It may include only the quantum dot 115. Herein, the wavelength of the light emitted by the quantum dot 115 may be defined as a peak wavelength in the emission spectrum. On the other hand, the quantum dots 115 included in the first and second light sources 102 and 103 are not limited to emitting red and green light, respectively, and may be a combination of various colors such as magenta and cyan. It may also emit light.

As in the present embodiment, the wavelength conversion unit is formed by using only one type of quantum dots 115 without mixing quantum dots 115 of different colors in one light source 102, 103. As a result, color deterioration can be minimized. That is, by configuring the light sources 102 and 103 by separating the quantum dots 115 of different colors, the color coordinate change of the light emitted from the light source module 100 may be reduced according to the operation time. Unlike the present embodiment, when one wavelength conversion unit is formed by mixing different colors, for example, red and green quantum dots, the red and green quantum dots are aggregated with each other over time. It will not emit light of its intended wavelength. Therefore, as in the present embodiment, the first and second light sources 102 and 103 having the quantum dots 115 of different colors are separately provided and arranged on the substrate 101 to minimize the deterioration of color characteristics due to the aggregation of the quantum dots. It can be. In this case, as shown in FIG. 1, the first and second light sources 102 and 103 may be arranged alternately, which is of different colors emitted by the first and second light sources 102 and 103. The mixing properties are to be improved.

The effect of the color separation structure of the quantum dots proposed in this embodiment is compared with the mixed structure of the quantum dots. 8 and 9 are graphs showing the degree of change in color coordinates according to the driving time of the light source in the comparative example and the embodiment of the present invention, respectively. In the comparative example of FIG. 8, it can be seen that the color coordinates change in a relatively large width as the light source is driven. In contrast, in the case of the embodiment of Figure 9, it can be seen that the change in the color coordinate is relatively relaxed, which is because there is no phenomenon that the quantum dots of different colors are aggregated with each other.

5 and 6 are plan views schematically illustrating a backlight unit according to another aspect of the present invention, respectively. 7 is a schematic cross-sectional view of the backlight unit of FIG. 6.

First, in the embodiment of FIG. 5, the backlight unit 200 includes a light guide plate 201 and a light source module 100 disposed on one side of the light guide plate 201, and forms a surface light source to form a liquid crystal display. It can be used as a light source of the device. In FIG. 5, the light source module 100 is disposed on only one side of the light guide plate 201, but the light source module 100 may be disposed on two or more side surfaces of the light guide plate 201. As described above, the light source module 100 may have a structure in which the first and second light sources 102 and 103 having quantum dots of different colors are arranged on the substrate 101. Deterioration of color characteristics of the light unit 200 may be reduced. The first and second light sources 102 and 103 disposed in the light source module 100 emit light toward the light guide plate 201 and may be surface-emitted by the light guide plate 201. In addition, although not shown, at least one optical sheet such as a diffusion sheet, a prism sheet, or the like may be disposed on the light guide plate 201 for surface emission.

Next, the embodiment of FIGS. 6 and 7 will be described. In the case of FIG. 6, the chassis 202 and the optical sheets 203 and 204 shown in FIG. 7 are omitted. The backlight unit 300 according to the present embodiment includes a light guide plate 201 and a first light source module 100a disposed on one side of the light guide plate 201, and a second light source module disposed on the other side of the light guide plate 201 ( 100b). In the above embodiment, the light sources having quantum dots of different colors are arranged in the light source module. In the present embodiment, the quantum dots are separated according to the light source modules 100a and 100b. That is, the first light source 102 included in the first light source module 100a includes a quantum dot emitting a first color, for example, red or magenta, and the second light source included in the second light source module 100b. Reference numeral 103 may include a quantum dot emitting a second color, for example, green or cyan. Furthermore, the first and second light sources 102 and 103 may include only quantum dots emitting the first and second colors, respectively.

As in the present embodiment, even when the quantum dots are separated by colors at the light source modules 100a and 100b, deterioration of color characteristics can be prevented. 6 illustrates a structure in which the first and second light source modules 100a and 100b are disposed on the side of the light guide plate 201 one by one, but at least one of the first and second light source modules 100a and 100b is two. More than one may be provided. In addition, although the light source module is shown in the side surface of the light guide plate in this embodiment of FIG. 5-7, the light guide plate is not provided separately and what is called a direct type | mold backlight which light emitted from a light source module directly enters an optical sheet. Units may also be implemented.

The present invention is not limited by the above-described embodiments and the accompanying drawings, but is intended to be limited only by the appended claims. It will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. something to do.

101: substrate 102: first light source
103: second light source 102a, 103a: light emitting portion
102b and 103b: wavelength conversion unit 110: package body
111, 112: lead frame 113: light emitting element
114: encapsulant 115: quantum dots
116: dispersion medium 117: sealing member
201: Light guide plate 202: Chassis
203, 204: optical sheet

Claims (16)

Board;
At least one first light source arranged on the substrate and including a light emitting element and a quantum dot disposed on an optical path of the light emitting element and emitting a first color; And
At least one second light source arranged on the substrate and including a light emitting element and a quantum dot disposed on an optical path of the light emitting element and emitting a second color different from the first color;
.
The method of claim 1,
The first and second light sources are respectively disposed on the light path of the light emitting device, and the light source module, characterized in that it comprises a wavelength conversion unit having a quantum dot for emitting the first and second colors, respectively.
The method of claim 2,
And a wavelength conversion part included in each of the first and second light sources, each having an encapsulant sealing the quantum dot.
The method of claim 3,
The quantum dots included in each of the first and second light sources are separated from each other by the encapsulant.
The method of claim 3,
At least one of the first and second light sources includes a cup-shaped package body in which the light emitting element is disposed, and the quantum dot is distributed in a cup of the package body.
The method of claim 3,
At least one of the first and second light sources is the light source module, characterized in that the wavelength conversion portion is disposed spaced apart from the light emitting device.
The method of claim 1,
And the first color is red and the second color is green.
The method of claim 1,
The first color is magenta, and the second color is cyan.
The method according to claim 7 or 8,
The light source module included in the first and second light sources emits blue light.
The method of claim 1,
The substrate has a bar shape, wherein the first and second light sources are arranged in the longitudinal direction of the substrate.
The method of claim 1,
At least one of the first and second light sources includes only one type of quantum dot.
The method of claim 1,
The light source module, characterized in that a plurality of first and second light sources are provided, alternately arranged.
Light guide plate; And
A light emitting device and a quantum dot disposed on at least one side of the light guide plate and disposed on the substrate to emit light toward the light guide plate and disposed on an optical path of the light emitting device and emitting a first color; At least one first light source, and a quantum dot disposed on the substrate to emit light toward the light guide plate, the light emitting device and a quantum dot disposed on an optical path of the light emitting device and emitting a second color different from the first color. A light source module including at least one second light source;
.
Light guide plate;
A light emitting device and a quantum dot disposed on at least one side of the light guide plate and disposed on the substrate to emit light toward the light guide plate, the light emitting device and a quantum dot disposed on an optical path of the light emitting device and emitting a first color; A first light source module including one or more first light sources; And
Disposed on the other side of the light guide plate, disposed on the substrate and the substrate to emit light toward the light guide plate, disposed on the light emitting element and the optical path of the light emitting element, and different from the first color; A second light source module including one or more second light sources including light emitting quantum dots;
.
The method according to claim 13 or 14,
The backlight unit further comprises a diffusion sheet and a prism sheet disposed on the light guide plate.
The method according to claim 13 or 14,
And the first and second light sources each include only quantum dots emitting the first and second colors.
KR1020110120869A 2011-11-18 2011-11-18 Light source module and backlight unit KR20130055223A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103941475A (en) * 2014-04-30 2014-07-23 深圳市华星光电技术有限公司 Liquid crystal display module and liquid crystal display device
CN104214608A (en) * 2014-09-09 2014-12-17 深圳市华星光电技术有限公司 Backlight module and liquid crystal display
KR20160063459A (en) * 2014-11-26 2016-06-07 엘지디스플레이 주식회사 Light emitting diode array and backlight unit having the same
WO2016169067A1 (en) * 2015-04-24 2016-10-27 深圳市华星光电技术有限公司 Backlight module and liquid crystal display

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103941475A (en) * 2014-04-30 2014-07-23 深圳市华星光电技术有限公司 Liquid crystal display module and liquid crystal display device
CN104214608A (en) * 2014-09-09 2014-12-17 深圳市华星光电技术有限公司 Backlight module and liquid crystal display
KR20160063459A (en) * 2014-11-26 2016-06-07 엘지디스플레이 주식회사 Light emitting diode array and backlight unit having the same
WO2016169067A1 (en) * 2015-04-24 2016-10-27 深圳市华星光电技术有限公司 Backlight module and liquid crystal display

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