KR20100002458A - Light emitting device - Google Patents

Light emitting device Download PDF

Info

Publication number
KR20100002458A
KR20100002458A KR1020080062362A KR20080062362A KR20100002458A KR 20100002458 A KR20100002458 A KR 20100002458A KR 1020080062362 A KR1020080062362 A KR 1020080062362A KR 20080062362 A KR20080062362 A KR 20080062362A KR 20100002458 A KR20100002458 A KR 20100002458A
Authority
KR
South Korea
Prior art keywords
light emitting
emitting device
light
inclined surface
optical member
Prior art date
Application number
KR1020080062362A
Other languages
Korean (ko)
Inventor
홍성호
Original Assignee
서울반도체 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.)
Filing date
Publication date
Application filed by 서울반도체 주식회사 filed Critical 서울반도체 주식회사
Priority to KR1020080062362A priority Critical patent/KR20100002458A/en
Publication of KR20100002458A publication Critical patent/KR20100002458A/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/69—Details of refractors forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F21S2/005—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/08—Combinations of only two kinds of elements the elements being filters or photoluminescent elements and reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F21V7/0033—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

PURPOSE: A light emitting device is provided to improve uniformity of illuminance by arranging a plurality of light emitting elements with a zigzag shape. CONSTITUTION: A light emitting device(100) includes a first light emitting unit(200), a second light emitting unit(300), and an optical unit(400). The first light emitting unit includes a plurality of first light emitting devices. A plurality of first light emitting elements are arranged along a first direction with a first interval. A second light emitting unit includes a plurality of second light emitting elements. The plurality of second light emitting elements are arranged along the first direction with the first interval. At least one second light emitting element is positioned between the first light emitting elements. The optical unit controls the path of the light emitted from the second light emitting element and includes one of transparent glass, quartz and plastic.

Description

Light emitting device {LIGHT EMITTING DEVICE}

The present invention relates to a light emitting device, and more particularly to a light emitting device that can implement a surface light source with a plurality of light emitting chips.

In general, light emitting diodes (LEDs) have many advantages of high luminous efficiency, long life, low power consumption, and eco-friendliness, and thus, the technical field using them is increasing.

Recently, in the field of automotive lighting, in particular in the field of headlights, daytime running lights and fog lights, attention has been paid to surface light source products in which four or five light emitting diode chips are arranged in a row. The reason why the above-mentioned multi-chip surface light source is attracting attention as an automotive light source is that in the final screen according to the automobile light distribution law, the surface using a plurality of light emitting diode chips to increase the uniformity according to the brightness and control the brightness of the point of the automobile light distribution law. This is because the light source device is very useful.

However, in the surface light source device using a plurality of light emitting diode chips, since the chips are arranged in a row at narrow intervals, thermal interference between each other is increased, resulting in deterioration of the chips and a sudden luminous flux and lifespan. . In particular, in the case of automotive headlamps, if the ambient temperature rises to about 100 ° C or higher during normal operation, the headlamps must be smooth because the environment must also include thermal effects due to the ambient temperature. In order to maintain the operation of a large heat sink must be used.

Accordingly, the present invention has been made in view of the above problems, and the present invention provides a light emitting device capable of minimizing losses due to thermal interference between light emitting chips to maintain a high luminous flux and to significantly reduce the size of a heat sink during normal operation. do.

A light emitting device according to an aspect of the present invention includes a first light emitting part, a second light emitting part, and an optical member. The first light emitting unit includes a plurality of first light emitting devices arranged at first intervals along a first direction. The second light emitting part includes a plurality of second light emitting devices arranged at the first intervals along the first direction, and the first light emitting device is positioned such that at least one second light emitting device is positioned between the first light emitting devices. It is disposed on the side of the light emitting portion. The optical member controls a path of light to be emitted between the first light emitting elements by changing a path of light emitted from the second light emitting element.

The optical member may include a first inclined surface formed above the second light emitting device to change a path of the light emitted upward from the second light emitting device toward the first light emitting part, and between the first light emitting devices. It may include a second inclined surface formed to change the path of the light reflected by the first inclined surface in the upper direction. The optical member may be formed of transparent glass, quartz, plastic, or the like. The optical member may further include a reflective layer formed on the first inclined surface and the second inclined surface.

The first gap is equal to or larger than the size of the second light emitting device. The second light emitting devices are formed to be spaced apart from the first light emitting devices at a second interval greater than or equal to the size of the second light emitting device in a second direction perpendicular to the first direction. The second interval may be greater than or equal to the first interval.

The first light emitting elements and the second light emitting elements may be formed of a light emitting diode chip or a light emitting diode package.

According to the light emitting device, a plurality of light emitting devices may be arranged in a zigzag form so as to be spaced apart at regular intervals, and an illuminance uniformity may be improved by implementing a light source image having an image shape using a separate optical member. By reducing the thermal interference between them, it is possible to prevent the deterioration of the luminous flux and lifespan due to deterioration, and to simplify heat dissipation devices such as heat sinks.

The above-described features and effects of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, and thus, those skilled in the art to which the present invention pertains may easily implement the technical idea of the present invention. Could be. As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described in the specification, and that one or more other features It should be understood that it does not exclude in advance the possibility of the presence or addition of numbers, steps, actions, components, parts or combinations thereof. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

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

1 is a perspective view showing a light emitting device according to an embodiment of the present invention, Figure 2 is a plan view of the light emitting device shown in FIG.

1 and 2, a light emitting device 100 according to an embodiment of the present invention includes a first light emitting part 200, a second light emitting part 300, and an optical member 400.

The first light emitting unit 200 includes a plurality of first light emitting elements 210 arranged at a first interval d1 along the first direction. The first light emitting elements 210 are mounted on the first substrate 220. The first substrate 220 supports the first light emitting elements 210 and supplies power to the first light emitting elements 210. For example, the first substrate 220 is formed of a printed circuit board (PCB). do. In addition, the first substrate 220 may be formed of a metal core printed circuit board (MCPCB) in order to apply power to the first light emitting elements 210 and increase heat radiation efficiency.

The second light emitting part 300 includes a plurality of second light emitting elements 310 arranged at first intervals d1 along the first direction. The second light emitting elements 310 are mounted on the second substrate 320. The second substrate 320 is for supporting the second light emitting elements 310 and applying power to the second light emitting elements 310, and may be formed of the same material as the first substrate 220.

The second light emitting unit 300 is disposed on the side of the first light emitting unit 200 such that at least one second light emitting device 310 is positioned between the first light emitting elements 210 adjacent to each other. That is, the second light emitting devices 310 are installed to be spaced apart from the first light emitting devices 210 by a second distance d2 in a second direction perpendicular to the first direction. Therefore, the first light emitting elements 210 and the second light emitting elements 310 are arranged in a substantially zigzag form.

The first light emitting elements 210 and the second light emitting elements 310 may be formed of a light emitting diode chip or a light emitting diode package in which the light emitting diode chip is mounted in a housing.

The optical member 400 controls the path of the light to be emitted between the first light emitting elements 210 by changing the path of the light emitted from the second light emitting device 310. To this end, the optical member 400 is formed to extend in the second direction to span the first light emitting part 200 and the second light emitting part 300.

Meanwhile, the first interval d1 between the first light emitting elements 210 is smaller than the size of the second light emitting device 310 in consideration of the size of the second light emitting device 310 and the optical member 400 corresponding thereto. It is preferable that they are formed equal or larger. That is, when the first gap d1 between the first light emitting elements 210 is smaller than the size of the second light emitting device 310, the optical member 400 having a width substantially equal to the size of the second light emitting device 310. ) May cover a portion of the upper portion of the first light emitting device 210 to reduce light efficiency, so that the first interval d1 is larger than the size of the second light emitting device 310. The interval between the first light emitted from the first light emitting device 210 and the second light emitted from the second light emitting device 310 and emitted to the side of the first light emitting devices 210 through the optical member 400 is determined. In order to reduce as much as possible, the first gap d1 may be formed to be substantially the same as the size of the second light emitting device 310. In addition, the second interval d2 between the first light emitting element 210 and the second light emitting element 310 is advantageously formed to be larger than the first interval d1 in order to reduce thermal interference. In order to minimize the increase in the size of the device, it is preferable to be formed substantially equal to the first interval d1.

3 is a cross-sectional view taken along line II ′ of FIG. 1, and FIG. 4 is a perspective view of the optical member illustrated in FIG. 1.

3 and 4, the optical member 400 may include a first inclined surface 410, a second inclined surface 420, and four side surfaces connecting the first inclined surface 410 and the second inclined surface 420. 430. The first inclined surface 410 is formed above the second light emitting device 310 in order to change the path of the light emitted upward from the second light emitting device 320 in the direction of the first light emitting device 210. The second inclined surface 420 is formed between the first light emitting elements 210 to change the path of the light reflected from the first inclined surface 410 upward. The optical member 400 having such a structure substantially changes the path of the light so that the light generated from the second light emitting device 310 is emitted next to the first light emitting devices 210 by using the principle of the latent mirror. do. That is, the light emitted from the second light emitting device 310 is reflected on the first inclined surface 410 and proceeds toward the second inclined surface 420, and is reflected back from the second inclined surface 420 and emitted upward.

The optical member 400 is formed of a transparent material to allow light to travel therein. For example, the optical member 400 may be made of transparent glass, quartz, plastic, or other optical grade transparent material. In addition, the optical member 400 is preferably designed to enable total internal reflection in order to minimize the loss of light and to increase the light collection efficiency.

5 is a view showing an optical member according to another embodiment of the present invention.

4 and 5, the optical member 400 may further include a reflective layer 440 formed on the first inclined surface 410 and the second inclined surface 420. The reflective layer 440 may be formed on the first inclined surface 410 and the second inclined surface 420 by, for example, depositing a metal or a dielectric. The reflective layer 440 may increase light reflectance to minimize light loss and further improve light collection efficiency.

In addition to the first inclined surface 410 and the second inclined surface 420, the reflective layer 440 may receive light from the lower portion of the first inclined surface 410 and the optical member 400, from which the light is incident from the second light emitting device 310. It may be formed on the remaining side surfaces 430 except for the upper portion of the second inclined surface 420.

6 is a view showing an image on the screen for the light emitting device shown in FIG.

1 and 6, when the light emitting device 100 shown in FIG. 1 is operated in front of a screen or a surface of a secondary optical system, a light source image as shown in FIG. 6 is generated. That is, the light emitted from the first light emitting device 210 is projected to the first region R1 on the screen, and the light emitted from the second light emitting device 310 is changed by the path through the optical member 400. It is projected on the 2nd area | region R2 which is between 1 area | region R1. Therefore, a light source image having the same image form as that of a plurality of light emitting elements arranged adjacently in a row is projected on the screen.

The light emitting device 100 having such a structure may be utilized for general lighting that considers uniformity of illumination in addition to the field of automobile lighting such as headlamps, daytime running lights, and fog lights, and needs to illuminate a long distance within a certain area. It can also be used in fields such as lighting.

As such, by arranging the plurality of light emitting devices in a zigzag form so as to be spaced apart at regular intervals, and implementing a light source image having an image form using a separate optical member, illuminance uniformity may be improved. In addition, by reducing thermal interference between the light emitting elements, it is possible to prevent the deterioration of the luminous flux and lifespan due to deterioration, and to simplify heat dissipation devices such as heat sinks.

In the detailed description of the present invention described above with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art having ordinary skill in the art will be described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

1 is a perspective view showing a light emitting device according to an embodiment of the present invention.

FIG. 2 is a plan view of the light emitting device shown in FIG. 1.

3 is a cross-sectional view taken along the line II ′ of FIG. 1.

4 is a perspective view illustrating the optical member illustrated in FIG. 1.

5 is a view showing an optical member according to another embodiment of the present invention.

6 is a view showing an image on the screen for the light emitting device shown in FIG.

<Explanation of symbols for the main parts of the drawings>

100 light emitting device 200 first light emitting unit

210: first light emitting device 300: second light emitting part

310: second light emitting element 400: optical member

410: first inclined surface 420: second inclined surface

440: reflective layer

Claims (8)

A first light emitting unit including a plurality of first light emitting devices arranged at first intervals along a first direction; A plurality of second light emitting devices arranged at the first intervals along the first direction, and disposed at the side of the first light emitting part such that at least one second light emitting device is positioned between the first light emitting devices; A second light emitting unit; And And an optical member configured to change a path of light emitted from the second light emitting device to control a path of light to be emitted between the first light emitting elements. The method of claim 1, wherein the optical member A first inclined surface formed above the second light emitting device to change a path of light emitted upward from the second light emitting device toward the first light emitting part; And And a second inclined surface formed between the first light emitting elements to change a path of the light reflected and introduced from the first inclined surface to an upper direction. The light emitting device of claim 2, wherein the optical member comprises any one of transparent glass, quartz, and plastic. The light emitting device of claim 3, wherein the optical member further comprises a reflective layer formed on the first inclined surface and the second inclined surface. The light emitting device of claim 1, wherein the first interval is equal to or larger than a size of the second light emitting device. The method of claim 5, wherein the second light emitting devices are spaced apart from the first light emitting devices at a second interval greater than or equal to the size of the second light emitting device in a second direction perpendicular to the first direction. Light emitting device. The light emitting device of claim 6, wherein the second interval is greater than or equal to the first interval. The light emitting device of claim 1, wherein the first light emitting elements and the second light emitting elements comprise any one of a light emitting diode chip and a light emitting diode package.
KR1020080062362A 2008-06-30 2008-06-30 Light emitting device KR20100002458A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080062362A KR20100002458A (en) 2008-06-30 2008-06-30 Light emitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080062362A KR20100002458A (en) 2008-06-30 2008-06-30 Light emitting device

Publications (1)

Publication Number Publication Date
KR20100002458A true KR20100002458A (en) 2010-01-07

Family

ID=41812489

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020080062362A KR20100002458A (en) 2008-06-30 2008-06-30 Light emitting device

Country Status (1)

Country Link
KR (1) KR20100002458A (en)

Similar Documents

Publication Publication Date Title
JP7265501B2 (en) Thin-line LED light-emitting device
US9541274B2 (en) Illumination module and illumination device comprising a flexible carrier
US9890916B2 (en) Lamp unit and vehicle using the same
KR101191213B1 (en) Lighting apparatus
RU2513865C2 (en) Light assembly and lantern for lighting of road and/or street
US9395063B2 (en) LED lighting engine adopting an icicle type diffusion unit
CN102933898A (en) Illumination device
JP2009129809A (en) Lighting system
JP6446202B2 (en) Wide-angle diffusion optical system and illumination device using the same
GB2393506A (en) Multiple reflector indirect light source lamp
EP2788677B1 (en) Led lighting apparatus
US20130003374A1 (en) Light emitting device and complex lens thereof
US20180172234A1 (en) Lamp unit, and lighting device and vehicle lamp using same
JP5133439B2 (en) Lighting device and lighting device including the same
KR20230143082A (en) Lighting device and vehicle lamp
US20190170316A1 (en) Vehicle lighting fixture
KR20100002458A (en) Light emitting device
JP2012226964A (en) Illumination apparatus and illumination equipment equipped with the same
US20210351228A1 (en) Light-emitting device, and method for producing same
US20190003689A1 (en) Light source module
JP2013045921A (en) Light emitting device and lighting device
JP2011096648A (en) Illumination device
JP2017162647A (en) Light source unit, and street lighting fixture
WO2013046306A1 (en) Lighting apparatus
WO2012144394A1 (en) Lighting unit and lighting device with same

Legal Events

Date Code Title Description
WITN Withdrawal due to no request for examination