KR20140039854A - Vehicle lamp enhancing long distance light efficiency - Google Patents

Vehicle lamp enhancing long distance light efficiency Download PDF

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Publication number
KR20140039854A
KR20140039854A KR1020120106624A KR20120106624A KR20140039854A KR 20140039854 A KR20140039854 A KR 20140039854A KR 1020120106624 A KR1020120106624 A KR 1020120106624A KR 20120106624 A KR20120106624 A KR 20120106624A KR 20140039854 A KR20140039854 A KR 20140039854A
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KR
South Korea
Prior art keywords
vehicle lamp
reflecting surface
reflector
focus
light
Prior art date
Application number
KR1020120106624A
Other languages
Korean (ko)
Inventor
이동준
Original Assignee
현대모비스 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 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR1020120106624A priority Critical patent/KR20140039854A/en
Publication of KR20140039854A publication Critical patent/KR20140039854A/en

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Classifications

    • 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
    • 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
    • F21V7/04—Optical design
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The present invention includes a reflector having an elliptical first reflecting surface, a light source whose longitudinal center is located at the first focusing point of the first reflecting surface, and a shield disposed below the second focusing point where the light reflected by the reflector is focused An oval second reflecting surface disposed in a rear of the shield and radiating light reflected from a lower portion of the first reflecting surface to the upper portion of the first reflecting surface to be disposed behind the shield. By providing a vehicle lamp including an auxiliary reflector having a, provides an advantageous effect of increasing the distance light efficiency.

Description

Vehicle lamp enhancing long distance light efficiency

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle lamp, and more particularly to a vehicle lamp having an additional reflector to increase the far-field light efficiency.

Background Art [0002] A headlamp for a vehicle is roughly divided into a headlamp installed in front of the vehicle and a taillamp installed in the rear of the vehicle. Generally, a headlamp is mounted on both sides of a front side of a vehicle to secure a view direction of the driver in the nighttime driving. Such a headlamp may include a shield for blocking a part of the irradiated light. Shields are used to implement regulated light distribution. Or the operation may cause the headlamp to be switched to a low beam or a high beam.

On the other hand, in order to realize the effect of condensing at a long distance, as a vehicle headlamp, a projection optical system may be used. In the projection optics, the reflecting surface of the reflector is composed of ellipses to form a focal point. But. In the case of halogen or HID bulbs, since they are formed elongated in the longitudinal direction, diffuse reflections that do not coincide with this focus exist. Typically, such diffusely reflected light is discarded light and is designed to be blocked by the shield. However, there is a problem that the light efficiency is lowered due to the discarded light.

Accordingly, an object of the present invention is to provide a vehicle lamp that can increase the far-field light efficiency by utilizing light that is thrown out of focus in a head lamp using a projection optical system.

The present invention for achieving the above object, a reflector having an elliptical first reflecting surface, a light source whose longitudinal center is located at the first focusing surface of the first focusing surface, and a second focus focusing light reflected from the reflector A vehicle lamp comprising a shield disposed below, the vehicle lamp disposed behind the shield, the light irradiated from the rear of the second focus and reflected from the lower portion of the first reflective surface to the upper portion of the first reflective surface A vehicle lamp comprising an auxiliary reflector having an elliptical second reflecting surface to reflect is provided.

Preferably, the second reflecting surface of the auxiliary reflector. It may include a left reflection surface and a right reflection surface divided in the left and right directions around the optical axis.

Preferably, the focal point of the left reflective surface may be formed at the same position as the second focal point based on the irradiation direction.

Preferably, the focal point of the left reflective surface may be formed to be spaced apart from the second focal point by a predetermined first interval in a left direction.

Preferably, the first interval may be within 0.65mm to 0.80mm.

Preferably, the focus of the right reflective surface may be formed at the same position as the second focus with respect to the irradiation direction.

Preferably, the focal point of the right reflective surface may be formed spaced apart from the second focal point by a predetermined second interval in the right direction.

Preferably, the second interval may be within 0.65mm to 0.80mm.

According to the vehicle lamp according to the present invention, it is disposed behind the shield to re-reflect the light blocked by the shield to send to the far front of the vehicle, thereby providing an advantageous effect of increasing the distance light efficiency.

Further, according to the vehicle lamp according to the present invention, the focus of the left and right reflection surface of the auxiliary reflector is formed to be spaced apart from the bulb center, so that the light reflected from the auxiliary reflector touches the filament of the light source to increase the temperature of the filament To provide an advantageous effect.

1 is a view showing a typical vehicle lamp provided with a projection optical system,
Figure 2 is a vehicle lamp shown in Figure 1, a view showing a state in which the light emitted from the light source located behind the focus is blocked by the shield,
3 is a view illustrating a lamp for a vehicle according to a preferred embodiment of the present invention,
4 is a view showing the auxiliary reflector shown in FIG.
5 is a top view of the vehicle lamp shown in FIG. 3;
6 is a view showing a light source having a predetermined length;
7 is a view comparing light efficiency of a vehicle lamp to which the present invention is applied and light efficiency of a vehicle lamp to which the present invention is not applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In addition, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be variously modified by those skilled in the art.

According to an aspect of the present invention, there is provided a vehicle lamp to which a projection optical system is applied, the light source being elongated in the longitudinal direction, and having an auxiliary reflector for recycling the light emitted from a position out of focus of the reflector.

Prior to describing the present invention, the path of light irradiated at a position out of focus of the reflector will be briefly described below with reference to FIGS. 1 and 2.

1 is a view showing a typical vehicle lamp provided with a projection optical system, Figure 2 is a vehicle lamp shown in Figure 1, a view showing a state in which the light emitted from the light source located behind the focus is blocked by the shield. to be.

Referring to FIG. 1, the reflector 11 of the conventional vehicle lamp 10 provided with the projection optical system has an elliptical first reflecting surface 1a and forms a first focal point as shown in F1 of FIG. 1. Light irradiated at the first focal point F1 is reflected by the reflector 11 and collected at the second focal point F2. The collected light is irradiated through the lens 13 provided in front. In this case, the shield 12 is formed below the second focal point F2 to block light reflected below the second focal point F2.

Referring to FIG. 2, the halogen or HID light source has a predetermined length, not a point light source. Usually, in the case of such a light source 1, it is arrange | positioned at the reflector 11 so that an irradiation direction may become a longitudinal direction. Accordingly, the light irradiated from the light source 1 may be irradiated even in a region other than the first focal point F1. For example, the light irradiated from the area A of the light source 1 corresponding to the rear of the first focal point F1 is as shown in FIG. 2. It is diffusely reflected by the reflector 11 and positioned below the second focal point F2. Therefore, these lights are blocked by the shield 12 and are not utilized for light distribution and are discarded.

The present invention includes an additional reflector to utilize this discarded light for light distribution.

3 is a view showing a vehicle lamp according to an embodiment of the present invention, Figure 4 is a view showing the auxiliary reflector shown in FIG. 3 and 4 clearly illustrate only the major feature parts in order to clearly understand the present invention, and as a result various variations of the illustrations are expected, and the scope of the present invention Need not be limited.

Referring to FIGS. 3 and 4 in parallel, the vehicle lamp 100 according to the preferred embodiment of the present invention, the secondary reflector 110 reflects the light is blocked by the shield 12, so as to be utilized for long distance light distribution. ).

This secondary reflector 110 is formed just behind the shield 12. At this time, the auxiliary reflector 110 is disposed so that the reflecting surface faces the reflector 11. In one embodiment, the auxiliary reflector 110 is preferably designed and arranged so that its top end does not exceed the top of the shield 12. The second reflecting surfaces 111 and 112 of FIG. 5 of the auxiliary reflector 110 reflect light reflected from the lower portion of the first reflecting surface 11a of the reflector 11 to the upper portion of the first reflecting surface 11a. Is formed. That is, it is formed in an elliptical shape concave in the direction opposite to the irradiation direction.

FIG. 5 is a view showing the vehicle lamp shown in FIG. 3 from above, and FIG. 6 is a view showing a light source having a predetermined length.

In an embodiment, referring to FIG. 5, the auxiliary reflector 110 may be formed concave in a direction opposite to the irradiation direction with respect to the optical axis C. Referring to FIG. The second reflecting surface of the auxiliary reflector 110 may be divided into a left reflecting surface 111 and a right reflecting surface 112 around the optical axis C. The left reflecting surface 111 and the right reflecting surface 112 each have an elliptical shape.

Meanwhile, referring to FIG. 6, the focal point F3 of the left reflecting surface 111 and the focal point F4 of the right reflecting surface 112 are the focal points F1 of the reflector 11 when the irradiation direction is referred to. It may be formed at the same position. In this case, the focal point F1 of the reflector 11 may be the longitudinal center 1a of the light source 1.

In addition, the focal point F3 of the left reflective surface 111 may be formed to be spaced apart from the focal point F1 of the reflector 11 by the first interval D1. Preferably, the first interval D1 may be within 0.65 mm to 0.80 mm. In addition, the focal point F4 of the right reflective surface 112 may also be formed to be spaced apart from the focal point F1 of the reflector 11 by a second interval D2. Preferably, the second interval D2 may also be within 0.65 mm to 0.80 mm.

This is to prevent the light reflected from the left reflection surface 111 and the right reflection surface 112 from reaching the filament of the light source 1 to increase the temperature of the filament.

7 is a view comparing light efficiency of a vehicle lamp to which the present invention is applied and light efficiency of a vehicle lamp to which the present invention is not applied.

FIG. 7A is a diagram showing the distance and the width of the vehicle lamp to which the above-described auxiliary reflector 110 is not applied. And (b) of FIG. 7 is a figure which shows the distance and width of the vehicle lamp to which the auxiliary reflector 110 was applied on the same conditions as FIG. 7 (a). As can be seen in Figure 7, as a result of applying the auxiliary reflector 110, it can be seen that the distance increases. The present invention has the advantage that the overall light efficiency can be increased by 10% or more by reflecting back the light lost by the shield (12).

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

11: reflector
110: auxiliary reflector
111: left reflection surface
112: right reflection surface

Claims (8)

A vehicle lamp comprising a reflector having an elliptical first reflecting surface, a light source having a longitudinal center at a first focus on the first reflecting surface, and a shield disposed below a second focus on which light reflected from the reflector is collected as,
An auxiliary reflector disposed at the rear of the shield and having an elliptical second reflecting surface irradiated from the rear of the second focal point and reflecting light reflected from the lower portion of the first reflecting surface to an upper portion of the first reflecting surface;
. The method according to claim 1,
The second reflecting surface of the auxiliary reflector is. Vehicle lamp comprising a left reflection surface and a right reflection surface divided in the left and right direction about the optical axis. 3. The method of claim 2,
The focal point of the left reflection surface is a vehicle lamp, characterized in that formed in the same position as the second focus on the basis of the irradiation direction. The method of claim 3,
The focus of the left reflection surface is a vehicle lamp, characterized in that formed in the left direction spaced apart by a predetermined first interval. 5. The method of claim 4,
The first interval is a vehicle lamp, characterized in that within 0.65mm to 0.80mm. 3. The method of claim 2,
The focus of the right reflecting surface, the vehicle lamp, characterized in that formed in the same position as the second focus with respect to the irradiation direction. The method according to claim 6,
The focus of the right reflection surface is a vehicle lamp, characterized in that formed in the right direction away from the second focus by a predetermined second interval. 8. The method of claim 7,
The second lamp is a vehicle lamp, characterized in that within 0.65mm to 0.80mm.
KR1020120106624A 2012-09-25 2012-09-25 Vehicle lamp enhancing long distance light efficiency KR20140039854A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120106624A KR20140039854A (en) 2012-09-25 2012-09-25 Vehicle lamp enhancing long distance light efficiency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120106624A KR20140039854A (en) 2012-09-25 2012-09-25 Vehicle lamp enhancing long distance light efficiency

Publications (1)

Publication Number Publication Date
KR20140039854A true KR20140039854A (en) 2014-04-02

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KR1020120106624A KR20140039854A (en) 2012-09-25 2012-09-25 Vehicle lamp enhancing long distance light efficiency

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170069398A (en) * 2015-12-11 2017-06-21 에스엘 주식회사 Lamp for vehicle
KR20190077885A (en) * 2017-12-26 2019-07-04 현대자동차주식회사 Lamp for vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170069398A (en) * 2015-12-11 2017-06-21 에스엘 주식회사 Lamp for vehicle
KR20190077885A (en) * 2017-12-26 2019-07-04 현대자동차주식회사 Lamp for vehicle

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