A kind of lens for automobile lamp
A technology of automotive lamps and lenses, which is applied in the direction of headlights, motor vehicles, road vehicles, etc., can solve the problem of insufficient utilization efficiency of LED light sources, and achieve the effect of increasing light distribution value, improving utilization efficiency, and increasing the design focal length
Active Publication Date: 2019-07-12
DANYANG YINUO AUTO PARTS
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Problems solved by technology
A common shortcoming of the two is that the utilization efficiency of the LED light source is not high enough.
The essential reason is that it is necessary to choose an optimal combination between the light distribution value (mainly depends on the focal length of the lens) and the light source utilization efficiency (the ratio of the lens aperture to the focal length). Under certain size constraints, it is impossible do both
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[0018] The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.
[0019] see Figure 1-3 , a kind of lens for automobile lamps, comprising a light source 1, an inner lens 2 and a main lens 3, the left side of the said main lens 3 is provided with an inner lens 2, and the left side of the inner lens 2 is provided with a light source 1; the effect of the inner lens 2 It is to re-optimize the direction of the light emitted by the LED light source; the focal point of the main lens 3 is the focal point A4, and the function of the focal point A4 is to gather light; theoretically, the virtual focal point of the inner lens 2 needs to match the focal point of the main lens 3, that is, the focal point A4 Overlap; the right side of the inner lens 2 is provided with a light exit surface 20, the light exit surface 20 is a spherical surface with the focal point A4 as the center of the sphere, and the light exit surface 20 can ...
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The invention discloses a lens for an automobile lamp. The lens comprises a light source, an inner lens and a main lens, wherein the inner lens is arranged on the left side of the main lens; the light source is arranged on the left side of the inner lens; a focal point of the main lens is a focal point A; a virtual focal point of the inner lens is superposed with the focal point A of the main lens; a light emergent surface is arranged on the right side of the inner lens; the side surface of the inner lens is a outwards protruding hyperboloid; a spherical surface is arranged inside the left end of the inner lens; the sphere center of the spherical surface is superposed with the center of the light source; a leftwards protruding convex surface is arranged inside the left end of the inner lens; and an oppositely elongated line of a light ray obtained by reflecting light, which is emitted by the light source, through the convex surface is located on the focal point A. The lens for the automobile lamp is reasonable in design, and the utilization efficiency of the light source can be improved; furthermore, by the application of a virtual focal point mode, the design focal length of the lens is enlarged, thus realizing smaller light source imaging of the same size, namely realizing higher focusing; and therefore, the light distribution value is increased.
Description
technical field [0001] The invention relates to the technical field of automobile lamps, in particular to a lens for automobile lamps. Background technique [0002] With the development of society and the improvement of people's living standards, cars have entered people's lives. Car lights are various traffic lights installed on cars to ensure safe driving. There are two types of lights and signal lights. Qualified automotive lamps should meet the corresponding photometric, chromatic and basic environmental test specifications. [0003] At present, LED light sources are rapidly being applied in the automotive lighting industry. In terms of high beam implementation, it is mainly realized by LED+lens or LED+reflector+lens. A common deficiency of both is that the utilization efficiency of the LED light source is not high enough. The essential reason is that it is necessary to choose an optimal combination between the light distribution value (mainly depends on the focal l...
Claims
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IPC IPC(8): F21S41/25F21S43/20F21W107/10F21Y115/10
CPCF21V5/04F21Y2115/10
Inventor 程葛军
Owner DANYANG YINUO AUTO PARTS