CN201803258U

CN201803258U - LED (light-emitting diode) dipped headlight of automobile

Info

Publication number: CN201803258U
Application number: CN2010202664470U
Authority: CN
Inventors: 朱向冰; 罗青青; 倪建; 陈瑾; 陈巧云; 周定华
Original assignee: Anhui Normal University
Current assignee: Anhui Normal University
Priority date: 2010-07-12
Filing date: 2010-07-12
Publication date: 2011-04-20
Anticipated expiration: 2020-07-12

Abstract

The utility model relates to an LED (light-emitting diode) dipped headlight of an automobile. The whole set of optical system consists of two similar optical structures, wherein the second optical structure is formed by mirroring the first optical structure left and right and rotating the first optical structure for 15 degrees. Each optical structure comprises an LED light source (1), a fuse (2), a conducting plate (3), a reflector cup (4) and a matched mirror (5). Three upper and lower LED light sources (1a), (1b) and (1c) are respectively connected with the fuse in series and then connected with the fuse in parallel. The reflector cup (4) is a free-form surface, the matched mirror is connected by a plane lens (5a) and a Fresnel lens (5b), the light rays of the LED light sources above the two optical structures are ejected out via the reflector cup and the plane lens part of the matched mirror, a light and shade cut-off line is generated on a matched screen, and the light ray of the lower LED light source is ejected out via the Fresnel lens part of the matched mirror to meet the passing light requirement specified in the standard. The structure is easy to process and manufacture, and the cost is reduced.

Description

A kind of vehicle LED dipped headlight

Technical field

The utility model relates to the automotive lighting technical field, especially a kind of vehicle LED dipped headlight.

Background technology

Compare LED (light emitting diode) with conventional light source and have long, reliability and durability, advantages such as volume is little, energy consumption is low, response is fast, flexible design of life-span.LED is widely used on vehicle interior lighting device and car external signal device, and development along with the white light LEDs technology, the luminous flux of single LEDs will improve constantly, light emitting diode has become competitive novel solid light source of 21 century, because LED design and control are flexibly, can carry out luminous intensity distribution to led light source, reach the light type that the designer requires.So, select the dipped headlights light source of led light source for use as automobile, than the optical design of selecting for use other light source to carry out more flexibly and effect more obvious, it replaces conventional light source and is used for headlamp and has become inexorable trend.

About the luminous intensity distribution of rules and regulations headlamp should make its dipped beam have enough illuminations and dazzle-free.Luminous intensity distribution performance should satisfy: 25m before headlamp reference center, cross on the vertical photometric screen that HV orders and measure, on filament shield, dipped beam should produce tangible "cut-off"line, its horizontal component is in the left side of v-v line, the right side be with horizontal alignment on 15 ° oblique line, or make progress oblique line at 45 to horizontal line vertically apart from the broken line of 25cm steering horizontal.And on photometric screen, stipulated the brightness value of key point.At present, the existing many schemes of the optical design of LED headlamp meet the demands, but because what mostly take now is the luminous intensity distribution zone to be divided into the zone that polylith (more than three) partially overlaps carry out luminous intensity distribution, and the shape in luminous intensity distribution zone is defined as rectangle or approximate rectangle mostly, the optical system complexity, make processing difficulties, cost of processing is improved.

Summary of the invention

In order to solve above-mentioned technical barrier, the utility model provides a kind of vehicle LED dipped headlight.

The utility model solves above-mentioned technical problem by following technical proposals:

A kind of dipped headlights that uses LED is made up of two similar optical textures, and second optical texture is first optical texture left and right sides mirror image, and rotates 15 degree formation; Each optical texture comprises led light source, fuse, conductive plate, reflector, lens, and reflector surrounds housing, and reflector is divided into two parts up and down by conductive plate, adopts three LEDs light sources up and down, adopts this mode to make optical system become simple.

Reflector is a free form surface, lens is to be formed by connecting by a planar lens and Fresnel lens, one LEDs light source of top and below two LEDs light sources are all at the rear, inside of reflector, and reflector reflexes to the light of the led light source incident of above and below respectively planar lens, the back outgoing of Fresnel lens part of lens.

The light that reflector sends the top led light source reflexes to outgoing behind the planar lens of lens, forms the part "cut-off"line of stipulating in the rules on filament shield.

The below light that sends of led light source reflexes to the Fresnel lens part back outgoing of lens respectively through reflector, that satisfies standard code does not have tangible illumination saltus step in the horizontal direction.

First optical texture produces horizontal "cut-off"line, and second optical texture produces the "cut-off"line of 15 degree.

In each optical texture, three LEDs are connected in parallel respectively again with fuse, and the circuit part of two optical textures adopts mode in parallel to connect.

Because the optical system of luminous intensity distribution is simple, not only can solve the problem of LED as the luminous intensity distribution aspect of dipped headlights, and help saving cost, be applicable to that the large-scale promotion of vehicle LED dipped headlight is used.

Description of drawings

Fig. 1 is according to standard, and the Illumination Distribution figure by the regular headlamp of keeping to the right has set up the xy coordinate system in the drawings;

Fig. 2 be only use first optical texture on filament shield Illumination Distribution, oblique line is represented the main region that it illuminates;

Fig. 3 be only use second optical texture on filament shield Illumination Distribution, oblique line is represented the main region that it illuminates;

Fig. 4 be use simultaneously two optical textures on filament shield Illumination Distribution;

Fig. 5 is the circuit theory diagrams of single optical system of the present utility model;

Fig. 6 is the front view of first optical texture;

Fig. 7 is an A-A cutaway view among the figure;

The schematic diagram of a whole set of optical system that Fig. 8 takes for the utility model.

The specific embodiment

Tell about specific embodiments below in conjunction with example.

Adopt two groups of great power LEDs, per three LEDs are one group, and the LED model is LXMW-PWN1-0100, and each optical texture forms a semicircle hot spot, and all near the HV point, radius is 4.5 meters in the center of circle.

Fig. 2 only uses the Illumination Distribution of first optical texture on filament shield, and oblique line is represented the main region that it illuminates, and central coordinate of circle is (0,50), and the "cut-off"line of generation is y=0 (x＜0).

Fig. 3 only uses the Illumination Distribution of second optical texture on filament shield, and oblique line is represented the main region that it illuminates, and central coordinate of circle is (0,50), and the "cut-off"line of generation is y=xtg15 ° (x＞0).

Fig. 4 is the field of illumination of using two optical textures to form on filament shield simultaneously.

In Fig. 6, a kind of vehicle LED dipped headlight, each optical system comprises led light source 1, fuse 2, conductive plate 3, reflector 4, lens 5.Reflector surrounds housing, reflector 4 is free form surfaces, lens 5 is to be connected by a planar lens 5a and Fresnel lens 5b, one LEDs light source 1a of top and below two

LEDs light source

1b, 1c are all at the rear, inside of reflector 4, and reflector 4 reflexes to the back outgoing of the planar lens 5a of lens 5, Fresnel lens 5b part respectively with led light source 1a, the 1b of above and below, the light of 1c incident.

In Fig. 5, the connected mode of circuit is the up and down three LEDs light sources parallel connection again of connect with fuse respectively in the single optical texture, even a LEDs short circuit, other LED is operate as normal still.

In Fig. 8, a whole set of optical system adopts two structures similar to Fig. 6, and second optical texture and light distribution element are first optical texture and light distribution element left and right sides mirror image, and rotates 15 degree and form, and circuit adopts the mode of parallel connection to connect between two optical textures.The light of the top led light source 1a of each optical system produces tangible "cut-off"line on filament shield after the planar lens 5a of reflector 4 and lens 5 part; The light of below led light source 1b, the 1c of each optical texture is after the Fresnel lens 5b of lens 5 part, dipped beam type on filament shield satisfies the illumination requirement of national standard to each district and each test point, and the luminous intensity distribution zone does not have tangible saltus step in the horizontal direction.

The light type of the generation of this automobile dipped headlight on filament shield satisfies the illumination requirement of national standard " GB4599-1994 car headlamp luminous intensity distribution performance " to each district and each test point, and the luminous intensity distribution zone does not have tangible saltus step in the horizontal direction.

The foregoing description is illustrative principle of the present utility model and effect thereof only; and the embodiment of part; for the person of ordinary skill of the art; under the prerequisite that does not break away from the utility model creation design; can also make some distortion and improvement, these all belong to protection domain of the present utility model.

Claims

1. vehicle LED dipped headlight is characterized in that: forms by two similar optical textures, and second left and right sides mirror image that optical texture is first optical texture, and rotate 15 degree and form; Each optical texture comprises led light source (1), fuse (2), conductive plate (3), reflector (4), lens (5), reflector (4) surrounds housing, reflector (4) is divided into two parts up and down by conductive plate (3), adopts three LEDs light sources (1a, 1b, 1c) up and down.

2. a kind of vehicle LED dipped headlight according to claim 1, it is characterized in that: reflector (4) is a free form surface, lens (5) is to be formed by connecting by a planar lens (5a) and Fresnel lens (5b), and a LEDs light source (1a) of top and below two LEDs light sources (1b, 1c) are all at the rear, inside of reflector (4).

3. a kind of vehicle LED dipped headlight according to claim 1 is characterized in that: in each optical texture, three LEDs are connected in parallel respectively again with fuse (2a, 2b, 2c), and the circuit part of two optical textures adopts mode in parallel to connect.