KR101675907B1 - Light converting panel, light emitting device package module and backlight unit - Google Patents

Abstract

The present invention relates to a light conversion panel, a light emitting device package module, and a backlight unit which can be used for a display or an illumination application. The light conversion device includes a light emitting surface on one side, a light emitting surface on the other side, A panel body; A first wing formed at one side of the panel body and having a shape inclined at a first inclination angle with respect to the light emitting surface; A second wing formed on the other side of the panel body and having a shape inclined at a second inclination angle with respect to the light emitting surface; And a light conversion layer formed on a light output surface of the panel body.

Description

A light emitting device package module, and a backlight unit (light emitting device package module and backlight unit)

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light conversion panel, a light emitting device package module, and a backlight unit. More particularly, the present invention relates to a light conversion panel, a light emitting device package module, and a backlight unit.

A light emitting diode (LED) is a kind of semiconductor device that can emit light of various colors by forming a light emitting source through the formation of a PN diode of a compound semiconductor. Such a light emitting device has a long lifetime, can be reduced in size and weight, and can be driven at a low voltage. In addition, these LEDs are resistant to shock and vibration, do not require preheating time and complicated driving, can be packaged after being mounted on a substrate or lead frame in various forms, so that they can be modularized for various purposes and used as a backlight unit A lighting device, and the like.

2. Description of the Related Art Generally, a light emitting device package is formed by forming a light conversion member above a light emitting device and packaging the same to convert light of a light emitting device into light of a desired color.

However, such a conventional light emitting device package has a problem in that when a light-converting member which is vulnerable to heat such as a quantum dot (QD) is used, the light-converting member is denatured due to heat generated in the light emitting device or the light efficiency is lowered.

Therefore, the conventional light emitting device package including the quantum dots may be formed by coating the quantum dots with a method of capping the quantum dots with an organic material or wrapping the surface with a material larger than the bandgap of the quantum dots, However, since the packaging process requires much time and cost, the cost of the product is increased and the productivity is decreased.

Also, when a large quantum dot is used in the light emitting device package, the sulfur component in the quantum dot reacts with the silver component plated on the electrode mold of the light emitting device package to cause discoloration, thereby reducing reliability.

In addition, when the light-converting member, which is vulnerable to heat, is provided at the end of the light emitting device package module and is spaced apart from the light emitting device, light generated from the light emitting device is scattered while passing through the light converting member, yellow ring phenomenon or light leakage phenomenon occurs.

It is an object of the present invention to solve the above problems and to solve the above problems and to provide a light emitting device package which can be manufactured by a simple process by disposing the quantum dots away from the light emitting device package, And a light emitting device package module and a backlight unit. The light emitting device package module and the backlight unit according to the present invention provide a light emitting device package module and a backlight unit. However, these problems are exemplary and do not limit the scope of the present invention.

According to an aspect of the present invention, there is provided a light conversion panel comprising: a panel body having a light incident surface on one side, a light emitting surface on the other side, and a long side in the longitudinal direction; A first wing portion extending from one end of the panel body and having a shape inclined at a first inclination angle with respect to the light emitting surface; A second wing extending from the other end of the panel body and having a shape inclined at a second inclination angle with respect to the light emitting surface; A light converting body layer mounted on a light emitting surface of the panel body; And a reflective layer having a first reflective layer provided on an outer surface of the first wing portion extending from the light incidence surface and a second reflective layer provided on an outer surface of the second wing portion extending from the light incidence surface, .

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Further, according to an aspect of the present invention, the light conversion layer may include a quantum dot or a fluorescent material.

Further, according to the idea of the present invention, a protective layer may be formed on the upper surface of the photo-conversion layer to protect the photo-conversion layer.

According to an aspect of the present invention, the panel body may be provided with a light diffusion pattern on the light-incoming surface so as to guide the direction of light generated in the edge-type light emitting device.

According to an aspect of the present invention, the light diffusion pattern may be a Fresnel lens pattern.

According to an aspect of the present invention, the panel body, the first wing portion, and the second wing portion may be coated with a heat radiating coating material so as to have a heat radiating effect.

According to an aspect of the present invention, there is provided a light emitting device package module including: a module substrate; A side-emitting light emitting device package mounted on the module substrate; And a light conversion panel for optically converting light generated in the light emitting device package, wherein the light conversion panel has a light incidence surface on one side for guiding light generated in the light emitting device package, A panel body extending in the longitudinal direction; A first wing portion extending from one end of the panel body and having a shape inclined at a first inclination angle with respect to the light emitting surface; A second wing extending from the other end of the panel body and having a shape inclined at a second inclination angle with respect to the light emitting surface; A light converting body layer mounted on a light emitting surface of the panel body; And a reflective layer having a first reflective layer provided on an outer surface of the first wing portion extending from the light incidence surface and a second reflective layer provided on an outer surface of the second wing portion extending from the light incidence surface, .

According to an aspect of the present invention, there is provided a backlight unit including: a module substrate; A side-emitting light emitting device package mounted on the module substrate; A light conversion panel that photo-converts light generated in the light emitting device package; And a light guide plate for guiding light passing through the light conversion panel, wherein the light conversion panel has a light incidence surface on one side for guiding light generated in the light emitting device package, a light exiting surface on the other side, A panel body formed in a long direction; A first wing portion extending from one end of the panel body and having a shape inclined at a first inclination angle with respect to the light emitting surface; A second wing extending from the other end of the panel body and having a shape inclined at a second inclination angle with respect to the light emitting surface; A light converting body layer mounted on a light emitting surface of the panel body; And a reflective layer having a first reflective layer provided on an outer surface of the first wing portion extending from the light incidence surface and a second reflective layer provided on an outer surface of the second wing portion extending from the light incidence surface, .

According to the embodiments of the present invention described above, a light-converting member vulnerable to heat such as a quantum dot (QD) can be separated from the light emitting device package and disposed above the light emitting device package module, A light conversion panel capable of preventing a mura phenomenon and a yellow ring phenomenon or a light leakage phenomenon of a display panel by forming a reflective layer on an inclined wing portion of the light conversion panel, So that the backlight unit can be realized. Of course, the scope of the present invention is not limited by these effects.

1 and 2 are perspective views illustrating a light conversion panel according to some embodiments of the present invention.
3 is a cross-sectional view showing the light conversion panel of Fig.
4 is a cross-sectional view illustrating a light emitting device package module according to some embodiments of the present invention.
5 is a cross-sectional view illustrating a backlight unit according to some embodiments of the present invention.
6 to 7 are perspective views showing a backlight unit according to some embodiments of the present invention.

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

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, The present invention is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In the drawings, the thickness and size of each layer are exaggerated for convenience and clarity of explanation.

It is to be understood that throughout the specification, when an element such as a film, region or substrate is referred to as being "on", "connected to", "laminated" or "coupled to" another element, It will be appreciated that elements may be directly "on", "connected", "laminated" or "coupled" to another element, or there may be other elements intervening therebetween. On the other hand, when one element is referred to as being "directly on", "directly connected", or "directly coupled" to another element, it is interpreted that there are no other components intervening therebetween do. Like numbers refer to like elements. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

Although the terms first, second, etc. are used herein to describe various elements, components, regions, layers and / or portions, these members, components, regions, layers and / It is obvious that no. These terms are only used to distinguish one member, component, region, layer or section from another region, layer or section. Thus, a first member, component, region, layer or section described below may refer to a second member, component, region, layer or section without departing from the teachings of the present invention.

Also, relative terms such as "top" or "above" and "under" or "below" can be used herein to describe the relationship of certain elements to other elements as illustrated in the Figures. Relative terms are intended to include different orientations of the device in addition to those depicted in the Figures. For example, in the figures, when the element is turned over, the elements depicted as being on the upper surface of the other elements are oriented on the lower surface of the other elements. Thus, the example "top" may include both "under" and "top" directions depending on the particular orientation of the figure. If the elements are oriented in different directions (rotated 90 degrees with respect to the other direction), the relative descriptions used herein can be interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically showing ideal embodiments of the present invention. In the figures, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention should not be construed as limited to the particular shapes of the regions illustrated herein, but should include, for example, changes in shape resulting from manufacturing.

Quantum dots (QDs) referred to in the present invention refer to nanometer-sized particles that can have optical characteristics arising from quantum confinement. When irradiated with stimulated radiation, they emit light of a specific wavelength can do.

1 and 2 are external perspective views showing a light conversion panel 100 according to some embodiments of the present invention, and FIG. 3 is a sectional view showing a light conversion panel 100 of FIG.

1, the light conversion panel 100 according to some embodiments of the present invention includes a panel body 10, a first wing portion 11, a second wing portion 12, And a photo-conversion layer 20.

More specifically, for example, the panel body 10 may have a light incidence surface 10a on one side and a light exiting surface 10b on the other side, and may be elongated in the longitudinal direction.

Here, the panel body 10 may be made of polycarbonate, polysulfone, polyacrylate, polystyrene, polyvinyl chloride, polyvinyl alcohol, polynorbornene, polyester, or the like In addition, various light transmitting resin materials can be applied.

3, the first wing portion 11 is formed on one side of the panel body 10 and has a first inclined angle A1 with respect to the light emitting surface 10b, And the second wing portion 12 is formed on the other side of the panel body 10 and has a shape inclined at a second inclination angle A2 with respect to the light emitting surface 10b .

At this time, the first inclination angle A1 and the second inclination angle A2 can be appropriately changed according to the constituent material of the panel body 10.

For example, the first inclination angle A1 and the second inclination angle A2 can be adjusted so that the transmittance and the concentration of light passing through the panel body 10 are improved.

1, the light converting body layer 20 may be formed on the light emitting surface 10b of the panel body 10. [

Here, the light conversion layer 20 may include a quantum dot or a fluorescent material.

More specifically, for example, the quantum dot may be a group IV element, a group II-VI compound, a group II-V compound, a group III-VI compound, a group III-V compound, a group IV-VI compound, Group compound, a Group II-IV-VI compound, and a Group II-IV-V compound.

In addition, the quantum dots may be ZnO, ZnS, ZnSe, ZnTe, CdO, CdS, CdSe, CdTe, MgS, MgSe, GaAs, GaN, GaP, GaSe, GaSb, HgO, HgS, HgSe, HgTe, InAs, And at least one of InSb, AlAs, AlN, AlP, AlSb, TlN, TlP, TlAs, TlSb, PbO, PbS, PbSe, PbTe and Ge or Si.

The quantum dots may be composed of a core (3 to 10 nm) such as CdSe and InP, a shell (0.5 to 2 nm) such as ZnS and ZnSe, and a ligand for stabilizing the core and shell. Accordingly, it is possible to have an optical characteristic capable of realizing various colors.

In addition, the quantum dot may include a monomer that may be included in a physical structure or other form, and may be polymerized into a desired physical structure, such as a film.

More specifically, for example, the quantum dots may be formed in the form of a sheet, cured in a paste form together with various binders, and formed in various liquid forms such as a gel state or a gall state.

3, a protective layer 30 may be formed on the upper surface of the light conversion layer 20 so as to protect the light conversion layer 20.

Accordingly, the protective layer 30 can protect the photo-conversion layer 20 from at least one of external air, moisture, foreign matter, and heat.

In addition, the phosphor may be filled in a fluidized state to be cured, and may be applied to the light emitting surface 10b of the panel body 10 in a roots manner. For example, dispensing, spray coating and the like are common methods of roots, and dispensing includes mechanical methods such as pneumatic method and screw, linear type. It is also possible to control the amount of dyeing through a small amount of jetting by means of a jetting method and control the color coordinates thereof.

In order to control the efficiency of the long wavelength light emitting phosphor that reabsers light emitted from a short wavelength among two or more kinds of phosphors having different emission wavelengths, two or more kinds of phosphor layers having different emission wavelengths can be distinguished. A DBR (ODR) layer may be included between each layer to minimize wavelength reabsorption and interference.

1 to 3, the first wing portion 11 or the second wing portion 12 is formed by a reflective layer 40 (see FIG. 1) around the light incidence surface 10a of the panel body 10, May be formed.

For example, the reflective layer 40 may include a first reflective layer 41 formed on the first wing portion 11 and a second reflective layer 42 formed on the second wing portion 12 .

Here, the reflective layer 40 may be formed of an epoxy resin composition, a silicone resin composition, a modified epoxy resin composition, a modified silicone resin composition, a polyimide resin composition, a modified polyimide resin composition, a polyphthalamide (PPA), a polycarbonate resin, (PPS), liquid crystal polymer (LCP), ABS resin, phenol resin, acrylic resin, PBT resin, Bragg reflection layer, air gap, total reflection layer and metal layer .

In addition, the reflective layer 40 may be formed by selecting at least one of EMC including a reflective material, white silicon containing a reflective material, and photoimageable solder resist (PSR).

More specifically, the reflective layer 40 may be formed of a metal such as titanium oxide, silicon dioxide, titanium dioxide, zirconium dioxide, potassium titanate, alumina, aluminum nitride, boron nitride, mullite, chrome, May contain a reflective material.

Therefore, it is possible to prevent the Mura phenomenon and the yellow ring phenomenon of the display panel by controlling the light through the reflective layer 40, and it is possible to prevent the light leakage phenomenon of the light leaking to the side of the light guide plate 110, .

2, a light diffusion pattern P may be formed on the light incidence surface 10a of the panel body 10 so as to guide light incident on the panel body 10. In addition, as shown in FIG. At this time, the light diffusion pattern P may be a Fresnel lens pattern.

Therefore, since the light passing through the center of the panel body 10 is diffused in the longitudinal direction of the panel body 10, the light can be efficiently diffused.

On the other hand, the panel body 10, the first wing portion 11 and the second wing portion 12 can be coated with the heat radiating coating material so as to have a heat radiating effect. Also, the heat radiation paint may be applied to the reflection layer 40 together.

For example, the heat dissipation coating material may contain a resin and solid metal particles or solid particles, and the metal or solid particles may include at least one of aluminum (Al), zinc (Zn), iron (Fe), cobalt (Co) ), Copper (Cu), manganese (Mn), molybdenum (Mo), silver (Ag), tin (Sn), emulsions, carbide and carbon black.

Therefore, when the temperature of the light conversion panel 100 is increased, the light conversion panel 100 including the heat dissipation paint easily releases heat to the outside, Can be prevented.

4 is a cross-sectional view illustrating a light emitting device package module 1000 according to some embodiments of the present invention.

4, the light emitting device package module 1000 according to some embodiments of the present invention includes a module substrate 1200, a light emitting device package 1100, and a light conversion panel 100 .

More specifically, for example, the light emitting device package module 1000 includes a module substrate 1200, a side-emitting light emitting device package 1100 mounted on the module substrate 1200, and a light- The light conversion panel 100 includes a light incidence surface 10a on one side thereof for guiding light generated in the light emitting device package 1100, A panel body 10 having a light surface 10b and being elongated in the longitudinal direction and a plurality of optical fibers 10 formed on one side of the panel body 10 and having a first inclined angle A1 with respect to the light emitting surface 10b And a second wing portion formed on the other side of the panel body and having a shape inclined at a second inclination angle A2 with respect to the light emitting surface 10b And a light conversion layer 20 formed on the light output surface 10b of the panel body 10. [ have.

Here, the light conversion panel 100 may have the same structure and function as those of the light conversion panel 100 according to the embodiment of the present invention shown in FIGS. 1 to 3. Therefore, detailed description is omitted.

The module substrate 1200 may be made of a material or a conductive material having appropriate mechanical strength and insulation so as to support or accommodate the light conversion panel 100 and the light emitting device package 1100.

For example, as the module substrate 1200, a metal substrate such as aluminum, copper, zinc, tin, lead, gold, or silver, which is insulated, may be applied.

In addition, the module substrate 1200 may be a synthetic resin substrate such as a resin or a glass epoxy, or a ceramic substrate in consideration of thermal conductivity.

The module substrate 1200 may be formed of at least one selected from EMC (Epoxy Mold Compound), PI (polyimide), ceramics, graphene and glass synthetic fibers partially or wholly in order to improve workability.

In addition, the light emitting device package 1100 may include a light emitting device, and the light emitting device may include a blue LED, a green LED, a red LED, a yellow LED, an ultraviolet LED, and an infrared LED. have.

5 is a cross-sectional view illustrating a backlight unit 2000 in accordance with some embodiments of the present invention, and FIGS. 6 through 7 are external perspective views illustrating a backlight unit 2000 according to some embodiments of the present invention.

5, a backlight unit 2000 according to some embodiments of the present invention includes a module substrate 1200, a light emitting device package 1100, a light conversion panel 100, and a light guide plate 110, . ≪ / RTI >

More specifically, for example, the backlight unit 2000 includes a module substrate 1200, a side-emission type light-emitting device package 1100 mounted on the module substrate 1200, and a light- And a light guide plate 110 for guiding light passing through the light conversion panel 100. The light conversion panel 100 includes a light guide plate 110 for guiding light emitted from the light emitting device package 1100, (10) having a light incidence surface (10a) on one surface and a light exiting surface (10b) on the other surface so as to guide the light exiting surface A first wing portion 11 having a shape inclined at a first inclination angle A1 with respect to the light emitting surface 10b and a second wing portion 11 formed at the other side of the panel body 10, A second wing portion 12 having a shape inclined at an inclined angle A2, And a light conversion layer 20 formed on the light-outgoing surface 10b.

Here, the module substrate 1200, the light emitting device package 1100, and the light conversion panel 100 are formed of the light emitting device package module 1000 according to the embodiment of the present invention shown in FIGS. 1 to 4 Elements and their configurations and roles may be the same. Therefore, detailed description is omitted.

In addition, the light guide plate 110 may be installed in an optical path of light generated from the light emitting device package 1100 with a light transmitting material, and may transmit light generated from the light emitting device package 1100 with a wider area.

The light guide plate 110 may be made of polycarbonate, polysulfone, polyacrylate, polystyrene, polyvinyl chloride, polyvinyl alcohol, polynorbornene, polyester, or the like , And various light transmitting resin materials may be applied.

In addition, the light guide plate 110 may be formed by various methods such as forming fine patterns, fine protrusions, diffusion films, or the like on the surface, or forming fine bubbles therein.

Although not shown, various diffusion sheets, prism sheets, filters, and the like may be additionally provided above the light guide plate 110. In addition, various display panels such as an LCD panel may be installed above the light guide plate 110. [

On the other hand, although not shown, the present invention may include a lighting device or a display device including the light conversion panel 100 described above. Here, the components of the illumination device or the display device according to some embodiments of the present invention may have the same configuration and function as those of the above-described light conversion panel of the present invention. Therefore, detailed description is omitted.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: Panel body
11: first wing portion
12: second wing portion
20: Photoconversion layer
30: Protective layer
40: reflective layer
P: light diffusion pattern
100: light conversion panel
110: light guide plate
1000: Light emitting device package module
1100: Light emitting device package
1200: module substrate
2000: backlight unit

Claims (9)

A panel body having a light incidence surface on one surface, a light exiting surface on the other surface, and being elongated in the longitudinal direction;
A first wing portion extending from one end of the panel body and having a shape inclined at a first inclination angle with respect to the light emitting surface;
A second wing extending from the other end of the panel body and having a shape inclined at a second inclination angle with respect to the light emitting surface;
A light converting body layer mounted on a light emitting surface of the panel body; And
And a second reflection layer provided on an outer surface of the second wing portion extending from the light incidence surface, wherein the first reflection layer is provided on an outer surface of the first wing portion extending from the light incidence surface, panel. delete The method according to claim 1,
Wherein the light conversion layer comprises a quantum dot (QD) or a phosphor. The method according to claim 1,
And a protective layer is formed on an upper surface of the photo-conversion layer to protect the photo-conversion layer. The method according to claim 1,
Wherein the panel body is formed with a light diffusion pattern on the light entrance surface so as to guide the direction of light generated in the edge type light emitting device. 6. The method of claim 5,
Wherein the light diffusion pattern is a Fresnel lens pattern. The method according to claim 1,
Wherein the panel body, the first wing portion, and the second wing portion are coated with a heat radiating paint so as to have a heat radiating effect. Module substrate;
A side-emitting light emitting device package mounted on the module substrate; And
And a light conversion panel for photo-converting the light generated in the light emitting device package,
The light conversion panel includes:
A panel body having a light incidence surface on one side, a light exiting surface on the other side, and a longer length in a longitudinal direction to guide light generated in the light emitting device package;
A first wing portion extending from one end of the panel body and having a shape inclined at a first inclination angle with respect to the light emitting surface;
A second wing extending from the other end of the panel body and having a shape inclined at a second inclination angle with respect to the light emitting surface;
A light converting body layer mounted on a light emitting surface of the panel body; And
And a second reflection layer provided on an outer surface of the second wing portion extending from the light incidence surface, wherein the first reflection layer is provided on an outer surface of the first wing portion extending from the light incidence surface, Package module. Module substrate;
A side-emitting light emitting device package mounted on the module substrate;
A light conversion panel that photo-converts light generated in the light emitting device package; And
And a light guide plate for guiding light passing through the light conversion panel,
The light conversion panel includes:
A panel body having a light incidence surface on one side, a light exiting surface on the other side, and a longer length in a longitudinal direction to guide light generated in the light emitting device package;
A first wing portion extending from one end of the panel body and having a shape inclined at a first inclination angle with respect to the light emitting surface;
A second wing extending from the other end of the panel body and having a shape inclined at a second inclination angle with respect to the light emitting surface;
A light converting body layer mounted on a light emitting surface of the panel body; And
And a reflective layer having a first reflective layer provided on an outer surface extending from the light incidence surface of the first wing portion and a second reflective layer provided on an outer surface extending from the light incidence surface of the second wing portion, .

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