Light-emitting diode (LED) module

Abstract

The invention discloses a light-emitting diode (LED) module, comprising an LED and a lens matched with the LED, wherein the lens has a concave light incoming surface and a convex light emitting surface, a first coordinate surface and a second coordinate surface vertically intersected are intersected with the light incoming surface and the light emitting surface of the lens, and at least part of continuous areas of the light emitting surface meet the following condition: the radius of curvature of any point of the part of continuous areas in the first coordinate surface is greater than the distance between the point and the LED, and is less than the radius of curvature of a corresponding point on the light incoming surface; and the radius curvature of any point of the above areas in the second coordinate surface is greater than the distance between the point and the LED and is larger than the radius of curvature of a corresponding point on the light incoming surface, thus the light emitting angle of light which is emitted by the LED and reflected by the lens in the first coordinate surface is larger than the light emitting angle thereof in the second coordinate surface. In the invention, the lens regulates light of the LED to generate an optical shape which has large illumination range along one direction and has small illumination range along the other direction, thus being suitable for illumination of special occasions such as roads and the like.

Description

Technical field [0001] The invention relates to a lighting device, in particular to a light source module. Background technique [0002] As an emerging light source, light-emitting diodes have been widely used in various current fields due to their advantages of high luminous efficiency, small size, light weight, and environmental protection, and have a tendency to replace traditional light sources. [0003] Existing light-emitting diode lamps usually cover the light-emitting diode with a lens to gather light, but the shape of the light projected by the lens is circular, and the light intensity difference between the center and the periphery is too large. In addition, for some occasions where a large illumination angle is required in one direction but a small illumination angle in another direction, such as road lighting, a large illumination range is required in the extension direction of the road; and it does not need to be wide in the vertical road direction. Range lighting, ot...

AI Technical Summary

Problems solved by technology

However, the illuminance directly under the lamp is high, and the illuminance in other areas is low, which still leads to poor uniform illuminance on the road surface. This uneven lighting directly affects driving safety.

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