LED (light-emitted diode) light source lens and LED lamp

Abstract

The invention relates to an LED (light-emitted diode) light source lens comprising a cylinder and a curved surface body protruding upwards from the top end of the cylinder, wherein a blind hole used for containing an LED light source is arranged at the bottom surface of the cylinder, the side surface of the cylinder is in smooth linkage with the convex curved surface of the curved surface body, the convex curved surface is a light outgoing surface formed by smoothly linking two curved surfaces, one curved surface is a quarter rotating ellipsoid, and the other curved surface is formed by smoothly connecting two symmetrical ellipsoid spherical crown curved surfaces by an inwards-concaving connecting curved surface. The invention also provides an LED lamp, comprising the LED light source contained in the blind hole of the lens, and the LED light source lens covering outside the LED light source. The lens can obtain a dissymmetrical batwing grading effect, can stimulate light intensity with the largest angle larger than 65 degrees, and can form ideal illumination with uniform luminance on a road surface. As the curved surfaces forming the lens are connected with one another in a smooth way, and the gradient of the curved surface changes monotonously and constantly, the lens can be formed by arranging split line injection modeling and can be directly formed by casting, so that the forming cost is low and the efficiency is high.

Description

technical field [0001] The invention relates to the field of LED lamps and light source optical systems thereof, in particular to an LED light source lens and an LED lamp. Background technique [0002] At present, the light source area of ​​an integrated light source obtained by arranging multiple LED chip array packages on the same substrate is often much larger than that of a single LED light source. For example, when 100 LED chips are integrated and packaged, the light source area can reach 40mm×40mm. The power of this integrated packaged LED light source can reach tens or even hundreds of watts, thereby greatly reducing the number of light sources, reducing the area of ​​lamps, and reducing the cost of light sources and lamps. However, optical design for such light sources is more difficult. At present, the commonly used optical systems for such large-scale light sources generally use reflective cups, but the light they can control is limited, and it is difficult to ac...

AI Technical Summary

Problems solved by technology

However, the die-casting process does not allow discontinuities in the slope of the surface, or points where the slope changes from positive to negative infinity

However, without such discontinuous curved surfaces, it is difficult to achieve ideal optical light distribution, especially batwing light distribution with a maximum light intensity angle greater than 65 degrees. Therefore, it is difficult for existing large lens products to form on the road. Light distribution with uniform brightness

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