KR20090032578A - Light unit - Google Patents

Light unit Download PDF

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Publication number
KR20090032578A
KR20090032578A KR1020070097940A KR20070097940A KR20090032578A KR 20090032578 A KR20090032578 A KR 20090032578A KR 1020070097940 A KR1020070097940 A KR 1020070097940A KR 20070097940 A KR20070097940 A KR 20070097940A KR 20090032578 A KR20090032578 A KR 20090032578A
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KR
South Korea
Prior art keywords
light source
light
reflecting surface
aspherical lens
optical axis
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KR1020070097940A
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Korean (ko)
Inventor
최성욱
오세욱
주종현
Original Assignee
현대자동차주식회사
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Priority to KR1020070097940A priority Critical patent/KR20090032578A/en
Publication of KR20090032578A publication Critical patent/KR20090032578A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
    • F21S41/332—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas with continuity at the junction between adjacent areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/80—Light emitting diode

Abstract

A light source unit for a vehicle is provided to reduce the optical loss of the third reflective surface from the first reflective surface which is effectively arranged around a light source. A light source(10) is arranged on an optical axis(x) of a light source unit at the rear of an aspherical lens(4). The light source is located on a supporting plate(11) in order to irradiate the light toward the upper side of the optical axis. A reflection part consists of the first reflector having two reflective surfaces(1,2) and the second reflector having one reflective surface(3). The first and second reflective surfaces have the different focuses. The first reflective surface reflects the light of the light source to the aspherical lens and has the first focal point(f1) between the light source and aspherical lens.

Description

차량용 광원 유닛{Light Unit}Vehicle Light Units {Light Unit}

본 발명은 광 손실이 적으며 광효율이 우수한 차량용 광원 유닛에 관한 것으로, 구체적으로는 LED를 광원으로 사용하는 차량용 헤드램프의 광원 유닛과 관련된다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle light source unit with low light loss and excellent light efficiency, and more particularly, to a light source unit of a vehicle headlamp using LED as a light source.

최근 들어, 차량용 광원 유닛에 LED를 사용하는 것에 대한 관심 및 실제 차량에의 적용이 높아지고 있다.In recent years, interest in using LEDs in vehicle light source units and their application to actual vehicles are increasing.

일례로, 도 1에 도시된 바와 같이, 헤드램프(100)의 하이빔(101)이나 로우빔(102)의 광원으로 백색 LED가 사용되고 있으며, 특히, 유럽이나 일본 등의 주요 메이커에서 광원 유닛에 LED를 적극적으로 적용하고 있다.For example, as shown in FIG. 1, a white LED is used as a light source of the high beam 101 or the low beam 102 of the headlamp 100, and in particular, LEDs of the light source unit in major manufacturers such as Europe or Japan are used. Is actively applied.

통상적으로 헤드램프용 광원 유닛은 광원의 빛을 리플렉터에서 반사하여 비구면 렌즈를 통하여 전방으로 조사될 수 있도록 구성되는데, 여기서, 광원의 빛에 대한 비구면 렌즈를 통하여 전방으로 조사되는 빛 간의 비율, 즉 광효율이 문제가 된다. 리플렉터의 반사면을 광원 주위에 적절히 배치하여 광원의 빛이 손실 없이 비구면 렌즈를 통하여 조사될 수 있도록 하기 위한 광원 유닛의 개발이 요구된다.Typically, the light source unit for the headlamp is configured to reflect the light of the light source from the reflector to be irradiated forward through the aspherical lens, wherein the ratio between the light irradiated forward through the aspherical lens to the light of the light source, that is, the light efficiency This is a problem. There is a need for the development of a light source unit to properly arrange the reflecting surface of the reflector around the light source so that the light of the light source can be irradiated through the aspherical lens without loss.

본 발명은 광원 주위에 반사면이 효과적으로 배치되어 광 손실이 적으며 광효율이 우수한 차량용 광원 유닛을 제공함을 목적으로 한다.SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle light source unit having a low light loss and excellent light efficiency because a reflective surface is effectively disposed around a light source.

상기의 목적을 달성하기 위한 본 발명에 따른 차량용 광원 유닛은,Vehicle light source unit according to the present invention for achieving the above object,

상술한 바와 같은 구조로 이루어진 차량용 광원 유닛에 따르면, 광원 주위에 효과적으로 배치된 제1반사면~제3반사면으로 인해 광 손실이 적으며 광효율이 우수하다.According to the vehicle light source unit having the structure as described above, due to the first reflecting surface to the third reflecting surface effectively disposed around the light source, the light loss is low and the light efficiency is excellent.

이하에서는 첨부된 도면을 참조하여 본 발명의 바람직한 실시예에 따른 차량용 광원 유닛에 대하여 살펴본다.Hereinafter, a vehicle light source unit according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

도 2에서 보듯이, 광원 유닛은 광원(10), 광원 주위에 배치된 2개의 리플렉터(1,2,3), 전방의 비구면 렌즈(4)로 구성된다.As shown in FIG. 2, the light source unit consists of a light source 10, two reflectors 1, 2, 3 arranged around the light source, and an aspherical lens 4 in front.

광원(10)은 비구면 렌즈(4)의 후방에서 광원 유닛의 광축(x) 상에 배치된다. 광축(x)은, 도 2에서, 비구면 렌즈(4)의 중앙을 지나는 수평선으로 나타나 있으며, 광원(10)은 광축(x)의 상측으로 빛을 조사할 수 있도록 지지 플레이트(11) 위에 놓여진다. 광원(10)으로는 LED가 사용되며, 지지 플레이트(11)는 헤드램프 하우징(미도시)에 고정된다.The light source 10 is disposed on the optical axis x of the light source unit behind the aspherical lens 4. The optical axis x is shown in FIG. 2 as a horizontal line passing through the center of the aspherical lens 4, and the light source 10 is placed on the support plate 11 so that light can be irradiated onto the optical axis x. . LED is used as the light source 10, and the support plate 11 is fixed to the headlamp housing (not shown).

리플렉터(1,2,3)는 2개의 반사면(1,2)을 갖는 제1리플렉터와 1개의 반사 면(3)을 갖는 제2리플렉터로 구성된다. 제1, 제2반사면(1,2)은 동일 리플렉터로 구성되나, 초점이 다른 별개의 반사면이다.The reflectors 1, 2, 3 are composed of a first reflector having two reflecting surfaces 1, 2 and a second reflector having one reflecting surface 3. The first and second reflecting surfaces 1, 2 are made of the same reflector but are separate reflecting surfaces having different focal points.

제1반사면(1)은 광원(10)의 상측에 배치되어 광원(10)의 빛을 비구면 렌즈(4) 측으로 반사 및 집광하는 광원 유닛의 주반사면이다. 이러한 제1반사면(1)은 타원형으로서, 광원(10)과 비구면 렌즈(4) 사이에서 광축(x) 사에 놓여지는 제1초점(f1)을 구비한다. 제1반사면(1)에 반사된 빛(L1)은, 제1초점(f1)을 지나 비구면 렌즈(4)에 집광되거나, 광축(x)과 평행하게 직진한다. 제1반사면(1)의 상단에는 제2반사면(2)이 연장되며, 하단에는 광축(x)이 접한다.The first reflecting surface 1 is a main reflecting surface of the light source unit which is disposed above the light source 10 and reflects and condenses the light of the light source 10 toward the aspherical lens 4. This first reflecting surface 1 is elliptical and has a first focal point f1 that lies between the light source 10 and the aspherical lens 4 and lies on the optical axis x. The light L1 reflected on the first reflecting surface 1 is focused on the aspherical lens 4 through the first focal point f1 or goes straight in parallel with the optical axis x. The second reflective surface 2 extends at the upper end of the first reflective surface 1, and the optical axis x is in contact with the lower end.

제2반사면(2)은 제1반사면(1)의 상단에서 연장되며, 제1반사면(1)을 벗어나는 광원(10)의 빛을 광축(x) 하측으로 반사한다. 이러한 제1반사면(1)은 타원형으로서, 제1초점(f1)과는 다른 제2초점(f2)을 갖는다. 제2초점(f2)은 제1초점(f1)의 후방에서 광축(x) 상에 놓이며, 제2반사면(2)에 반사된 빛(L2)은 제2초점(f2)을 통과하여 제3반사면(3)에서 다시 전방으로 반사된다. 한편, 제2반사면(2)의 상단은 광축(x)에 접한다.The second reflecting surface 2 extends from an upper end of the first reflecting surface 1 and reflects the light of the light source 10 that leaves the first reflecting surface 1 to the lower side of the optical axis x. This first reflecting surface 1 is elliptical and has a second focal point f2 different from the first focal point f1. The second focal point f2 lies on the optical axis x behind the first focal point f1, and the light L2 reflected by the second reflecting surface 2 passes through the second focal point f2 to form the second focal point f2. It is reflected back to the front in the three reflection surface (3). On the other hand, the upper end of the second reflection surface 2 is in contact with the optical axis (x).

제3반사면(3)은 광축(x)의 하측에 놓여, 제2반사면(2)으로부터 반사된 빛(L2)를 비구면 렌즈(4) 측으로 다시 반사한다. 이러한 제3반사면(3)은 타원형으로서, 제1초점(f1) 및 제2초점(f2)과는 다른 별도의 초점을 갖는다. 도 2에 도시된 실시예에서는 제3반사면(3)의 초점은 비구면 렌즈(4) 전방에 놓이도록 하였으나, 집광효율 증대의 관점에서 또 다르게 설정될 수 있을 것이다.The third reflecting surface 3 lies below the optical axis x and reflects the light L2 reflected from the second reflecting surface 2 back to the aspherical lens 4 side. The third reflecting surface 3 is elliptical and has a separate focal point different from the first and second focal points f1 and f2. In the embodiment shown in FIG. 2, the focal point of the third reflecting surface 3 is placed in front of the aspherical lens 4, but may be set differently from the viewpoint of condensing efficiency increase.

비구면 렌즈(4)는 제1반사면(1) 및 제3반사면(3)으로부터 반사된 빛을 광축 에 평행하게 전방으로 조사한다.The aspherical lens 4 irradiates the light reflected from the first reflecting surface 1 and the third reflecting surface 3 forwardly in parallel with the optical axis.

도 1은 통상적인 차량의 헤드램프를 도시한 도면,1 shows a headlamp of a typical vehicle;

도 2는 본 발명의 일실시예에 따른 광원 유닛의 배치구조를 도시한 도면이다.2 is a diagram illustrating an arrangement structure of a light source unit according to an exemplary embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1: 제1반사면 2: 제2반사면1: first reflective surface 2: second reflective surface

3: 제3반사면 4: 비구면 렌즈3: third reflecting surface 4: aspherical lens

10: 광원 11: 지지 플레이트10: light source 11: support plate

L1: 제1반사면의 반사광 L2: 제2반사면의 반사광L1: reflected light of first reflective surface L2: reflected light of second reflective surface

f1: 제1초점 f2: 제2초점f1: first focus f2: second focus

x: 광축x: optical axis

Claims (5)

비구면 렌즈(4);Aspherical lens 4; 상기 비구면 렌즈(4) 후방에서 광축(x) 상측으로 빛을 조사하는 광원(10);A light source 10 irradiating light from the rear of the aspherical lens 4 onto the optical axis x; 상기 광원(10)의 상측에 배치되며, 광원(10)과 비구면 렌즈(4) 사이에 배치되는 제1초점(f1)을 구비하여 광원(10)의 빛을 비구면 렌즈(4) 측으로 반사하는 타원형의 제1반사면(1);An ellipse disposed above the light source 10 and having a first focal point f1 disposed between the light source 10 and the aspherical lens 4 to reflect the light of the light source 10 toward the aspherical lens 4. First reflecting surface 1 of; 상기 제1반사면(1)의 전방에 배치되며, 제1초점(f1) 후방에 배치되는 제2초점(f2)을 구비하여 제1반사면(1)을 벗어나는 광원(10)의 빛을 광축(x) 하측으로 반사하는 타원형의 제2반사면(2); 및The optical axis of the light source 10 which is disposed in front of the first reflection surface 1 and has a second focal point f2 disposed behind the first focal point f1 and leaves the first reflection surface 1. (x) an elliptical second reflecting surface 2 reflecting downward; And 상기 광축(x) 하측에 배치되며, 제2반사면(2)으로부터의 빛을 비구면 렌즈(4) 측으로 반사하는 타원형의 제3반사면(3);을 포함하는 것을 특징으로 하는 차량용 광원 유닛.And an elliptical third reflecting surface (3) disposed below the optical axis (x) and reflecting light from the second reflecting surface (2) toward the aspherical lens (4). 청구항 1에 있어서, 상기 제1초점(f1) 및 제2초점(f2)은 광축(x) 상에 놓이는 것을 특징으로 하는 차량용 광원 유닛.The vehicle light source unit according to claim 1, wherein the first focus point f1 and the second focus point f2 lie on an optical axis x. 청구항 2에 있어서, 상기 제3반사면(3)의 상단은 광축(x)에 접하는 것을 특징으로 하는 차량용 광원 유닛.The light source unit for a vehicle according to claim 2, wherein an upper end of said third reflecting surface (3) is in contact with an optical axis (x). 청구항 1에 있어서, 상기 제1반사면(1)과 제2반사면(2)은 하나의 리플렉터로 구성된 것을 특징으로 하는 차량용 광원 유닛.The light source unit for a vehicle according to claim 1, wherein the first reflecting surface (1) and the second reflecting surface (2) are composed of one reflector. 청구항 1 내지 청구항 4 중 어느 한 청구항에 있어서, 상기 광원(10)은 LED인 것을 특징으로 하는 차량용 광원 유닛.The light source unit for a vehicle according to any one of claims 1 to 4, wherein the light source (10) is an LED.
KR1020070097940A 2007-09-28 2007-09-28 Light unit KR20090032578A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130004176A (en) * 2011-06-30 2013-01-09 스탠리 일렉트릭 컴퍼니, 리미티드 Vehicle lighting unit
KR20160003938A (en) * 2014-07-01 2016-01-12 현대자동차주식회사 Lighting apparatus for vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130004176A (en) * 2011-06-30 2013-01-09 스탠리 일렉트릭 컴퍼니, 리미티드 Vehicle lighting unit
KR20160003938A (en) * 2014-07-01 2016-01-12 현대자동차주식회사 Lighting apparatus for vehicle
US9557025B2 (en) 2014-07-01 2017-01-31 Hyundai Motor Company Lighting apparatus for vehicle
DE102014118621B4 (en) 2014-07-01 2020-07-30 Hyundai Motor Company LIGHTING DEVICE FOR A VEHICLE WITH A BREAKING ELEMENT ON A LENS FOR LIGHT REFLECTED ON A REFLECTOR, A FIRST REFLECTING BODY AND A SECOND REFLECTING BODY

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