KR20110090493A - Light guide plate and light device having the same - Google Patents

Light guide plate and light device having the same Download PDF

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Publication number
KR20110090493A
KR20110090493A KR1020100010308A KR20100010308A KR20110090493A KR 20110090493 A KR20110090493 A KR 20110090493A KR 1020100010308 A KR1020100010308 A KR 1020100010308A KR 20100010308 A KR20100010308 A KR 20100010308A KR 20110090493 A KR20110090493 A KR 20110090493A
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KR
South Korea
Prior art keywords
light
phosphor
light emitting
guide plate
emitting device
Prior art date
Application number
KR1020100010308A
Other languages
Korean (ko)
Inventor
장기연
Original Assignee
엘지이노텍 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020100010308A priority Critical patent/KR20110090493A/en
Publication of KR20110090493A publication Critical patent/KR20110090493A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00663—Production of light guides
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0003—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being doped with fluorescent agents
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0065—Manufacturing aspects; Material aspects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Planar Illumination Modules (AREA)

Abstract

A light guide plate and a light emitting device having the same according to an embodiment include: a light incident surface on which light is incident; Uneven patterns formed on the light incident surface; And a phosphor layer formed flat on the uneven pattern.

Description

Light guide plate and light emitting device having the same {light guide plate and light device having the same}

An embodiment relates to a light guide plate and a light emitting device having the same.

Light emitting diodes (LED chips) are semiconductor light emitting devices that convert current into light. In recent years, the light emitting diode has gradually increased in brightness and is being used as a light source for a display, an automotive light source, and an illumination light source.

Recently, high output light emitting chips capable of realizing full color by generating short wavelength light such as blue or green have been developed. Thus, by porting a phosphor on the light emitting chip that absorbs a part of the light output from the light emitting chip and outputs a wavelength different from the light wavelength, the light emitting diodes of various colors can be combined and a light emitting diode emitting white light can be realized. Do.

The embodiment provides a light guide plate having excellent light uniformity and improved light efficiency and a light emitting device having the same.

The light guide plate according to the embodiment includes a light incident surface on which light is incident; Uneven patterns formed on the light incident surface; And a phosphor layer formed flat on the uneven pattern.

The light emitting device according to the embodiment includes a light source for generating light; And a light guide plate including a light incident surface on which the light is incident, an uneven pattern formed on the light incident surface, and a phosphor layer flatly formed on the uneven pattern.

According to the embodiment, a light guide plate having excellent light uniformity and improved light efficiency and a light emitting device having the same can be provided.

1 is a configuration diagram of a light emitting device according to the first embodiment.
2 is a configuration diagram of the light guide plate according to the first embodiment.
3 is an enlarged view illustrating main parts of the light guide plate according to the first embodiment;
4 is a configuration diagram of a light emitting device according to the second embodiment.
5 is a configuration diagram of a light guide plate according to a second embodiment.
6 is a configuration diagram of a light emitting device according to a third embodiment.
7 is a configuration diagram of the light emitting device according to the fourth embodiment.
8 is a configuration diagram of a light emitting device according to a fifth embodiment.

Hereinafter, a light guide plate and a light emitting device having the same according to an embodiment will be described in detail with reference to the accompanying drawings. In the description of an embodiment, each layer (film), region, pattern, or structure is formed “on” or “under” a substrate, each layer (film), region, pad, or pattern. In the case where it is described as "to", "on" and "under" include both "directly" or "indirectly" formed. Also, the criteria for top, bottom, or bottom of each layer will be described with reference to the drawings. In the drawings, the thickness or size of each layer is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size of each component does not necessarily reflect the actual size.

1 is a configuration diagram of a light emitting device 300 according to the first embodiment.

The light emitting device 300 according to the first embodiment includes a light source 100 for generating light and a light guide plate 200 for emitting light generated by the light source 100 as a surface light source.

The light source 100 includes a module substrate 110 and at least one light emitting device 120 mounted on the module substrate 110.

The module substrate 110 is made of a metal core PCB, FR-4 PCB, a general PCB, etc. can be variously changed within the technical scope of the embodiment.

The light emitting device 120 receives the driving power through the module substrate 110 to generate light. The light emitting device 120 may be configured in a form in which a configuration for driving the light emitting chip 130 is integrated in a package. In addition, the light emitting device 120 may be configured in the form of a chip on board (COB) in which the light emitting chip 130 is directly mounted on the module substrate 110. The light emitting chip 130 may be a colored LED such as a red LED, a blue LED, a green LED, a white LED, or a UV LED, but is not limited thereto. In addition, one light emitting device 120 may be provided in the form of N in 1 including two or more light emitting chips.

The light guide plate 200 receives light emitted from the light emitting element 120 through the light incident surface, and reflects, refracts, and scatters the light to change into planar light. Thus, the light emitting device 300 may be utilized for various purposes such as a backlight unit for a display panel, a decorative lamp, an illumination, and the like.

The phosphor layer 210 that is excited by the first light L1 emitted from the light emitting chip 130 and emitted to the second light L2 is formed on the light incident surface of the light guide plate 200.

FIG. 2 is a configuration diagram of the light guide plate 200 according to the first embodiment, and FIG. 3 is an enlarged view of the main part of the light guide plate 200 according to the first embodiment, and is formed on the interface between the phosphor layer 210 and the light guide plate 200. It is an enlarged view of the formed uneven | corrugated pattern.

The light guide plate 200 may include an acrylic resin of a transparent material that may transmit light. For example, plastics or resins such as polymethylmethacrylate (PCMA), PC, PET, etc. may be produced in a flat or wedge type, and may be formed of glass. It is possible.

An uneven pattern is formed on the light incident surface 205 of the light guide plate 200, and the phosphor layer 210 is formed flat on the uneven pattern. The concave-convex pattern formed on the light guide plate 200 may be formed in a shape in which the unit pattern 212 is continuous by using a polygon, such as a sphere, a triangle, a rectangle, or the like as the unit pattern 212. The unit pattern 212 may be formed in such a size that one or more phosphors may be embedded therein. For example, as shown in FIG. 3, the bottom side may be formed in a triangular form having a thickness of 0.3 μm and a height of 0.3 μm, and the size of the uneven pattern may be variously modified. In general, considering that the size of the phosphor varies from nano units to 10 μm or more, the size of the uneven pattern may also be designed in various sizes according to the size of the applied phosphor. In this uneven pattern, as the unit patterns 212 are uniformly formed, light of the light emitting device 120 may be uniformly incident.

The phosphor layer 210 includes a phosphor that is excited by the first light L1 emitted from the light emitting chip 130 and emitted to the second light L2. Therefore, according to the color of the light to be obtained, it may include at least one or more of yellow, red, green, blue phosphor, or white phosphor that can be combined with the color of the light emitting chip 130 and emit light of the corresponding color. have. For example, in order to obtain white light, a blue LED is applied and a yellow phosphor is added to the phosphor layer 210, or a mixed phosphor of red and green is used. Can be added.

The phosphor layer 210 may be formed by curing a resin having light transmittance and heat resistance or a mixture of silicon and a phosphor. For example, the resin and phosphor mixture may be cured to the light guide plate 200 using a mold or the like, or the phosphor layer 210 formed in the form of a film may be attached.

By such a configuration, the phosphor layer 210 having a coupling surface having an uneven pattern is formed on the light incident surface 205 of the light guide plate 200 according to the embodiment. Thus, the light emitting chip 130 for supplying light to the light guide plate 200 does not need a separate phosphor layer 210, thereby preventing a decrease in light intensity due to phosphor degradation, and the phosphor layer 210 may be formed of a light guide plate ( The light loss may be reduced by being formed integrally with the 200).

4 is a configuration diagram of the light emitting device 320 according to the second embodiment, and FIG. 5 is a configuration diagram of the light guide plate 200 according to the second embodiment. In the description of the second embodiment, the same configuration as that of the first embodiment will be omitted with reference to the first embodiment.

The light emitting device 320 according to the second embodiment includes a light guide plate 200 having a phosphor layer 230 on a light incident surface 207 and a light source 100 for supplying light to the light guide plate 200.

The light source 100 includes a module substrate and at least one light emitting device 120 mounted on the module substrate 110.

The module substrate 110 is made of a metal core PCB, FR-4 PCB, general PCB, etc., can be variously changed within the technical scope of the embodiment.

The light emitting device 120 receives the driving power through the module substrate 110 to generate light. The light emitting device 120 may be configured in a form in which a configuration for driving the light emitting chip 130 is integrated in a package. Here, the light emitting chip 130 may be a colored LED such as a red LED, a blue LED, a green LED, a white LED, or a UV LED.

The light guide plate 200 receives light from the light emitting device 120 through the phosphor layer 230, and reflects, refracts, and scatters the light to change into planar light. The phosphor layer 230 emitting the first light L1 emitted from the light emitting chip 130 to the phosphor of the phosphor layer 230 and emitting the second light L2 is formed.

A hemispherical uneven pattern is formed on the light incident surface 207 of the light guide plate 200, and the phosphor layer 230 is formed flat on the hemispherical uneven pattern.

The uneven pattern is formed in a shape in which the unit patterns are continuous by using the hemispherical pattern as the unit pattern. The hemispherical uneven pattern may be formed in such a size that one or more phosphors may be interposed. For example, when the diameter of the phosphor is R, the radius of the hemisphere may be formed to have a size of R or more. That is, the size of the uneven pattern may be variously modified according to the size of the applied phosphor. In this uneven pattern, as the unit patterns are uniformly formed, light of the light emitting device 120 may be uniformly incident.

The phosphor layer 230 includes a phosphor that is excited by the first light L1 emitted from the light emitting chip 130 and emitted to the second light L2. Therefore, according to the color of the light to be obtained, it may include at least one or more of yellow, red, green, blue phosphor, or white phosphor that can be combined with the color of the light emitting chip 130 and emit light of the corresponding color. have.

6 is a configuration diagram of the light emitting device 330 according to the third embodiment. In the description of the third embodiment, a duplicate description of the same configuration as the above-described embodiment will be omitted.

The light emitting device 330 according to the third embodiment includes a light guide plate 200 having phosphor layers 240a and 240b on both sides thereof, and a light guide plate 200 arranged on both sides of the light guide plate 200 through the phosphor layers 240a and 240b. And a light source 100 for supplying light.

That is, the light emitting device 330 according to the third embodiment is configured by arranging the light sources 100 on both side surfaces of the light guide plate 200. Thus, phosphor layers 240a and 240b are formed on both side surfaces of the light guide plate 200 through which light is incident.

The light source 100 may include a colored LED such as a red LED, a blue LED, a green LED, a light emitting chip 130 such as a white LED, or a UV LED. Since the light source 100 is arranged on both sides of the light guide plate 200, it is also possible to apply light emitting chips 130 of different colors to both sides.

Both side surfaces of the light guide plate 200 are formed with a concave-convex pattern in which a hemispherical unit pattern is continuous. The phosphor layers 240a and 240b may be formed flat on the hemispherical uneven pattern.

The phosphor layers 240a and 240b may include at least one of yellow, red, green, blue phosphors, or white phosphors. Accordingly, both phosphor layers 240a and 240b are excited by the first light L1 emitted from the light source 100 to transmit the second light L2 to the light guide plate 200.

7 is a configuration diagram of the light emitting device 340 according to the fourth embodiment. In the description of the fourth embodiment, a duplicate description of the same configuration as the above-described embodiment will be omitted.

The light emitting device 340 according to the fourth embodiment includes a light guide plate 200 having phosphor layers 240a and 240b on both sides thereof, and arranged on both sides of the light guide plate 200 through the phosphor layers 240a and 240b. It includes a light source 100 for supplying light, where the light source 100 may be implemented in the form of COB.

In the light emitting device 340 according to the fourth exemplary embodiment, phosphor layers 240a and 240b are formed on both sides of the light guide plate 200, and light sources are formed on both sides of the light guide plate 200 on which the phosphor layers 240a and 240b are formed. Each of 100 is arranged. Thus, phosphor layers 240a and 240b are formed on both side surfaces of the light guide plate 200 through which light is incident.

Both side surfaces of the light guide plate 200 are formed with a concave-convex pattern in which a hemispherical unit pattern is continuous. The phosphor layers 240a and 240b may be formed flat on the hemispherical uneven pattern.

The phosphor layers 240a and 240b may include at least one of yellow, red, green, blue phosphors, or white phosphors.

The light sources 100 arranged at both sides include a module substrate 110 and at least one light emitting device 140 mounted on the module substrate 110.

The module substrate 110 is made of a metal core PCB, FR-4 PCB, general PCB, etc., can be variously changed within the technical scope of the embodiment.

The light emitting device 140 receives driving power through the module substrate 110 to generate light. The light emitting device 140 may be configured in the form of a chip on board (COB) in which the light emitting chip 130 is directly mounted on the module substrate 110. Each light emitting chip 130 may be sealed on the module substrate 110 by a sealing material. The light emitting chip 130 may be a colored LED such as a red LED, a blue LED, a green LED, a white LED, a UV LED, or the like, but is not limited thereto.

8 is a configuration diagram of a light emitting device 350 according to the fifth embodiment. In the description of the fifth embodiment, duplicated description of the same configuration as the above-described embodiment will be omitted.

The light emitting device 350 according to the fifth exemplary embodiment is configured by arranging light sources 100 on both sides of the light guide plate 200, and includes light emitting element mounting parts 207a and 207b on both sides of the light guide plate 200. Phosphor layers 250a and 250b are formed.

The light source 100 may be formed by mounting the light emitting device 120 on the module substrate 110. Each light emitting device 120 may be a colored LED such as a red LED, a blue LED, a green LED, a white LED, or the like. And a light emitting chip 130 such as a UV LED.

Light emitting element mounting parts 207a and 207b may be formed at both side surfaces of the light guide plate 200 to insert the light emitting element 120 mounted on the module substrate 110. The light emitting device mounting parts 207a and 207b prevent the light emitted from the light emitting device 120 from being lost to a region other than the light guide plate 200.

An uneven pattern having a shape in which a hemispherical unit pattern is continuous is formed on the light incident surface on which the light emitting element seats 207a and 207b are formed. The phosphor layers 250a and 250b may be formed flat on the hemispherical uneven pattern. The phosphor layers 250a and 250b may include at least one of yellow, red, green, blue phosphors, or white phosphors.

As described above, in the light emitting device according to the present embodiment, the phosphor layer is integrally formed on the light incident surface of the light guide plate, and the uneven pattern is formed on the interface between the light guide plate and the phosphor layer. Thus, light uniformity and light efficiency of the light guide plate may be improved. In addition, when applying the LED chip as a light source, it is possible to apply without forming a separate phosphor layer in the LED package. As a result, the phosphor and the LED chip are separated from each other, thereby reducing the brightness of the phosphor due to phosphor degradation.

Features, structures, effects, and the like described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, and the like illustrated in each embodiment can be combined or modified with respect to other embodiments by those skilled in the art to which the embodiment belongs. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

In addition, the above description has been made with reference to the embodiment, which is merely an example, and is not intended to limit the present invention. It will be appreciated that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

Claims (17)

A light incident surface on which light is incident;
Uneven patterns formed on the light incident surface; And
A light guide plate comprising a phosphor layer formed flat on the uneven pattern. The method of claim 1,
The concave-convex pattern is a light guide plate is formed in a repeating predetermined unit pattern. The method of claim 2,
The unit pattern is a light guide plate formed of at least one of a sphere and a polygon. The method of claim 1,
The phosphor layer comprises a light guide plate comprising a phosphor and a resin. The method of claim 4
The phosphor includes at least one of a red phosphor, a green phosphor, a blue phosphor, and a white phosphor. The method of claim 4, wherein
The unit pattern is formed in the light guide plate having a size capable of embedding at least one phosphor. The method of claim 4, wherein
The resin is a light guide plate containing at least one of silicone and epoxy resin. A light source for generating light; And
And a light guide plate including a light incident surface on which the light is incident, an uneven pattern formed on the light incident surface, and a phosphor layer flatly formed on the uneven pattern. The method of claim 8,
The light source is
A module substrate; And
Light emitting device comprising at least one light emitting chip electrically connected to the module substrate. 10. The method of claim 9,
The light emitting chip,
A light emitting device comprising one or more of a red LED, a green LED, a blue LED, and a white LED. 10. The method of claim 9,
The light guide plate,
And a light emitting element seating portion formed on a light incident surface on which the light is incident to receive the light emitting chip of the light source. The method of claim 8,
The concave-convex pattern is a light emitting device formed of a predetermined unit pattern is repeated. The method of claim 12,
The unit pattern is a light emitting device formed of at least one of a sphere and a polygon. The method of claim 8,
The phosphor layer includes a phosphor and a resin. The method of claim 14, wherein
The phosphor includes at least one of a red phosphor, a green phosphor, a blue phosphor, and a white phosphor. The method of claim 14,
The unit pattern is a light emitting device having a size that can embed at least one of the phosphor. The method of claim 14,
The resin, light emitting device comprising at least one of silicon and epoxy resin.

KR1020100010308A 2010-02-04 2010-02-04 Light guide plate and light device having the same KR20110090493A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100010308A KR20110090493A (en) 2010-02-04 2010-02-04 Light guide plate and light device having the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100010308A KR20110090493A (en) 2010-02-04 2010-02-04 Light guide plate and light device having the same

Publications (1)

Publication Number Publication Date
KR20110090493A true KR20110090493A (en) 2011-08-10

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Application Number Title Priority Date Filing Date
KR1020100010308A KR20110090493A (en) 2010-02-04 2010-02-04 Light guide plate and light device having the same

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