CN100549501C - Projection Optical System Structure - Google Patents

Abstract

The present invention is a projection optical system structure, which is used for a vehicle headlight device, and mainly includes a light source group, which includes a fixing seat, a light emitting diode and a reflector body; a lens body, which is fixed in front of the light source group; by removing the left and right sides of the lens body to form a cut surface, the width of the lens body in the horizontal direction is narrowed. When a multi-light source system is composed of light emitting diodes as light sources, multiple lens bodies can be put close together to form a more compact and smaller multi-light source projection system, so as to avoid the situation where the optical system is too large.

Description

Projection Optical System Structure

technical field

The invention relates to a projective optical system structure, in particular to a projective optical system structure which uses a light emitting diode as a light source of the projective optical system and is applied to a vehicle lamp.

Background technique

Safe, high-efficiency, and streamlined vehicle lamps have always been the research and development goals of vehicle lights. Through the assistance of vehicle lights, drivers can clearly understand the road conditions and reduce the danger and discomfort of glare to other vehicles and pedestrians.

Existing automotive lamps, especially automotive headlights, have mostly used the existing projection optical system 1. The main components of the projection optical system 1 include a light source group 11 and a lens body 12. As shown in FIG. 1, the light source group 11 It is composed of a luminous body 111 and a mirror body 112; please refer to FIG. 2, which is the light path projection principle of the projection optical system 1. The light projected by the body 111 is gathered on the second focal point 3 through the reflective surface 113 of the mirror body 112, so that the light can be projected out through the lens body 12, so that the user of the vehicle can clearly see the road ahead Condition.

Since the light emitting diode (Light Emitting Diode, LED) was invented and applied, with the continuous improvement of semiconductor chip technology and the rapid improvement of packaging technology, high-brightness light-emitting diodes have been developed, and the brightness of the high-brightness light-emitting diodes has even reached Greatly surpassing the traditional incandescent bulbs, while the light-emitting diodes have the advantages of small size, light weight, low energy consumption, long life, short response time and good shock resistance, so that vehicle manufacturers see the advantages of high-brightness light-emitting diodes, and have tried to use them Light-emitting diodes are used in vehicle lamps as light sources for vehicle lamps;

Continue please refer to shown in Fig. 3, be the embodiment that uses LED 412 as the light source of projection optical system; Described projection optical system 4 is made up of light source group 41 and lens body 42, and described light source group 41 is made up of The fixed seat 411, the light emitting diode 412 and the reflector body 413 are formed; the difference between the projection optical system 4 and the conventional projection optical system 1 (as shown in FIG. 1 ) is that the former uses the light emitting diode 412 as the projection optical system The light source of system 4, which uses a conventional automotive light bulb as the light source of projection optical system 1;

However, the brightness of the light-emitting diodes 412 currently on the market still cannot reach the brightness of ordinary car bulbs, and the projection optical system 4 of the multi-light source system (as shown in FIG. 3 ) must be used to form an optical system that complies with relevant regulations; The projection optical system 4 of the multi-source system must be at least two or more sets of projection optical systems 4 to form a vehicle lamp, and the multiple independent projection optical systems 4 will lead to the entire system of the vehicle lamp. huge.

In view of this, the inventor aimed at the various deficiencies in use caused by the existing projection optical system, and the relevant laws and regulations often require automotive lamps to have a wide but not high light distribution. Based on this reason, Mengsi Creation improvement, after long-term research and improvement, just has the generation of the present invention.

Contents of the invention

The object of the present invention is to form a cut surface by removing the left and right sides of the lens body, so that the width of the lens body in the horizontal direction is narrowed. The lens bodies are close together to form a more compact multi-light source projection system with a smaller space, so as to avoid the situation that the optical system is too large.

In order to achieve the above object, the present invention provides a projective optical system structure, the projective optical system is used for a vehicle headlight device, which is characterized in that it includes:

The light source group includes a fixed seat, at least two light emitting diodes, and a reflector body; the fixed seat includes a base plate and at least two base bodies, and the base body is protruded on the base plate; the light emitting diode is fixed on a fixed On the seat body of the seat; the reflector body is fixed on the base plate of the fixed seat, and the reflector body has at least two continuous arc surfaces similar to ellipsoids on the top surface, and at the same time, each of the two sides of the reflector body cut side by side

A lens body, which is fixed in front of the light source group, the lens body has at least two continuous arc surfaces, and the top and bottom edges of the lens body have at least two continuous arcs, and form a plane at the junction of the two arcs , and at the same time, it is cut on both sides of the lens body.

It also includes a shading plate, and the shading plate is fixed between the light source group and the lens body.

The projected optical system structure of the present invention has the following advantages, which are described as follows:

1. The lens body of the projection optical system is equivalent to forming cut surfaces on both sides of two existing lens bodies and connecting them together. Light passes through both sides of the lens body, so removing both sides of the lens body to form a cut surface does not affect the effect of the overall optical system.

2. The lens body of the projection optical system is to remove its left and right sides, so that the width of the lens body in the horizontal direction is narrowed. close together to form a compact multi-light source projection system with a smaller space, so as to avoid the situation that the optical system is too large.

3. Due to the light radiation distribution characteristics of LEDs, most of the light is concentrated in the central part, and the brightness decreases as it approaches the horizontal direction. Therefore, the two sides of the reflector body can be reduced without affecting the effect of the overall optical system.

Description of drawings

FIG. 1 is a schematic diagram of a three-dimensional appearance of an existing projection optical system;

Fig. 2 is the light path projection principle of Fig. 1;

FIG. 3 is a schematic diagram of a three-dimensional appearance of an existing multi-source optical system;

4 is a schematic diagram of a three-dimensional appearance of a projection optical system;

Fig. 5 is an exploded schematic view of the projection optical system;

Fig. 6 is a light radiation distribution diagram of a light emitting diode;

Fig. 7 is a schematic diagram of the optical path of a partial vertical section in Fig. 5;

Fig. 8 is a schematic diagram of an optical path in a partial horizontal section of Fig. 5;

Fig. 9 is another embodiment of the projection optical system;

FIG. 10 is a schematic diagram of an optical path in a partial vertical section of FIG. 9 .

Explanation of reference signs

Prior art: 1 projection optical system; 11 light source group; 12 lens body; 2 first focus; 3 second focus; 4 projection optical system; 41 light source group; ; 42 lens bodies.

The present invention: 5 projection optical system; 51 light source group; 511 fixed seat; 5111 substrate; 5112 seat body; 512 light-emitting diode; 522 top edge; 523 bottom edge; 524 cut plane; 6 focal points; 7 shading plate.

Detailed ways

First of all, please refer to Fig. 4 and Fig. 5, which are three-dimensional appearance and exploded schematic diagrams of the projection optical system 5; the projection optical system 5 can be used in a vehicle headlight device, and it mainly includes a light source group 51 and a lens body 52; where,

The light source group 51 includes a fixed seat 511, at least two light emitting diodes 512 and a reflector body 513; the fixed seat 511 includes a base plate 5111 and at least two base bodies 5112, and the base body 5112 is protruded on the base plate 5111 , the base body 5112 is fixed for the light emitting diode 512; the light emitting diode 512 is fixed on the base body 5112 of the fixing seat 511; the reflector body 513 is fixed on the substrate 5111 of the fixing seat 511, and the The reflector body 513 has at least two continuous arc surfaces 5131 similar to ellipsoids on its top surface, and the two sides of the reflector body 513 are respectively cut planes 5132 at the same time. the projected light;

The lens body 52 can be an aspherical lens or a Fresnel lens, and the lens body 52 is fixed in front of the light source group 51, the lens body 52 has at least two continuous arc surfaces 521, and the lens body 52 The top edge 522 and the bottom edge 523 have at least two continuous circular arcs, and the junction of the two circular arcs forms a plane, and at the same time, each side of the lens body 52 forms a cut surface 524;

In order to clearly understand the structure and purpose of the present invention, the optical path of the present invention is described;

Please refer to FIG. 6 , which is a light radiation distribution diagram of the light emitting diode 512; the light radiation distribution characteristic of the light emitting diode 512 is that the light intensity projected near the central part is the strongest, and the closer the light intensity is to the horizontal direction, the higher the light intensity is. Weak; in addition, in order to reflect the light projected by the light-emitting diode 512 for the reflector body 513 of the projection optical system 5, and to meet a wide but not high light distribution required by relevant regulations, the reflector The reflector 5131 of body 513 then must be designed to have the curved surface of similar ellipsoid, makes reflector body 513 have the external shape of vertical section and horizontal section different shapes simultaneously, namely the vertical section of reflector body 513 and the focal point of horizontal section and The distance of the center point of the reflector 5131 of the reflector body 513 is different, which also makes the reflector 5131 of the reflector body 513 be formed by ellipses with infinitely many different focal lengths (the distance from the focal point to the center point), and form multiple ellipses Reflector 5131 (Polyellipsoid Reflector);

Please refer to Figure 7, which is a schematic diagram of the optical path of a partial vertical section of the projection optical system 5; the projection optical system 5 must meet the vertical light distribution height and have a clear cut-off type, when the projection optical system 5 is in motion, the light emitting diode 512 as the light source projects light, and the light passes through the reflector 5131 of the mirror body 513 to reflect and focus the light vertically near the focal point 6 of the lens body 52, so that Light can be projected through the lens body 52, and in order to allow more light to pass through the lens body 52, even the bottom edge 523 of the lens body 52 will be utilized in the distribution of the light path;

Please refer to FIG. 8, which is a schematic diagram of the optical path of a partial horizontal section of the projection optical system 5; the projection optical system 5 must also have a wide light distribution. The light emitting diode 512 as the light source projects light, and the light is horizontally reflected by the reflector 5131 of the mirror body 513, so that the lens body 52 projects the light horizontally and gathers it in the distance, and due to the light radiation distribution of the light emitting diode 512 itself characteristics, that is, the light intensity projected by the light emitting diode 512 near the central part is the strongest, and the light intensity near the horizontal direction is weaker, so that when the light projected by the light emitting diode 512 is reflected by the reflector 5131 of the mirror body 513, it will be more Concentrated projection of light;

Combining the light path of infinite vertical projection and the light path of infinite horizontal projection of the projection optical system 5 above can form a light pattern that is wide but not high.

Continue please refer to Fig. 9, which is another embodiment of the projection optical system 5; the main difference of the projection optical system 5 is that the projection optical system 5 includes a light source group 51, a lens body 52 and a shading plate 7. The light source group 51 includes a fixing seat 511, at least two light-emitting diodes 512 and a mirror body 513; the lens body 52 is fixed in front of the light source group 51; the light shield 7 is fixed on the light source group 51 Between it and the lens body 52, part of the light projected by the light source group 51 can be blocked to form a switching effect between high beam and low beam, as shown in FIG. 10 .

The above is only a preferred embodiment of the present invention, and should not limit the scope of the present invention with this, that is, all equivalent changes and modifications made according to the patent scope of the present invention and the contents of the description of the invention should still belong to this invention. within the scope of invention patents.

Claims (4)

1. A projective optical system structure, the projective optical system is used for a vehicle headlight device, characterized in that it comprises: The light source group includes a fixed seat, at least two light emitting diodes, and a reflector body; the fixed seat includes a base plate and at least two base bodies, and the base body is protruded on the base plate; the light emitting diode is fixed on a fixed On the seat body of the seat; the reflector body is fixed on the base plate of the fixed seat, and the reflector body has at least two continuous arc surfaces of ellipsoids on the top surface, and at the same time, each side of the reflector body has a all sides; A lens body, which is fixed in front of the light source group, the lens body has at least two continuous arc surfaces, and the top and bottom edges of the lens body have at least two continuous arcs, and form a plane at the junction of the two arcs , and at the same time, it is cut on both sides of the lens body. 2 . The projection optical system structure according to claim 1 , further comprising a shading plate, and the shading plate is fixed between the light source group and the lens body. 3 . 3. The projection optical system structure according to claim 1 or 2, characterized in that: the lens body is an aspherical lens. 4. The projection optical system structure according to claim 1 or 2, wherein the lens body is a Fresnel lens.

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