Floodlight total reflection lens and LED (light-emitting diode) lamp with same

Abstract

The invention relates to a floodlight total reflection lens and an LED (light-emitting diode) lamp with the same. The floodlight total reflection lens is provided with a top end surface, a bottom end surface and a rotary side surface, wherein the bottom end surface is provided with a hemispherical concave surface; the middle of the top end surface is provided with a conical concave surface; the generating line of the rotary side surface is a fold line; and the fold line comprises six straight sections which are sequentially connected. The LED lamp is characterized by being provided with the floodlight total reflection lens. According to the invention, the bottom end surface of the floodlight total reflection lens is provided with the concave spherical surface, and the top end surface is provided with the conical concave surface; after a light ray from the LED light source, having a small light-emitting angle, is refracted by the concave spherical surface, the light-emitting angle is amplified for the first time; after the light ray is refracted by the conical concave surface on the top surface, the light-emitting angle is amplified for the second time; and after being amplified twice, the strong light ray of a part close to the axial line is diffused around, thereby solving the problem that the light intensity of the part close to the axial line of the LED light source is high. Thus, more uniform floodlight distribution can be realized.

Description

technical field [0001] The invention relates to a light distribution lens of a lighting fixture, more specifically, to a floodlight total reflection lens and an LED lighting fixture with the lens. Background technique [0002] When LED light sources are used for flood lighting, reflective cups are generally used to distribute light to the LED light source, but the light distribution effect of this method is not very ideal, because the light intensity of the near-axis part of the LED light source is relatively large, but this Part of the light cannot be distributed through the reflector, so the floodlight distributed by the reflector will always have a high light intensity in the middle. [0003] In order to obtain a more uniform floodlight distribution, there are also concave lenses used to distribute light to the LED light source, but this method has a relatively low utilization rate of the luminous flux of the LED light source, which means that the light with a large lumin...

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Problems solved by technology

[0002] When LED light sources are used for flood lighting, reflective cups are generally used to distribute light to the LED light source, but the light distribution effect of this method is not very ideal, because the light intensity of the near-axis part of the LED light source is relatively large, but this Part of the light cannot be distributed through the reflector, so the floodlight distributed by the reflector will always have a higher light intensity in the middle

[0003] In order to obtain a more uniform flood light distribution, there are also concave lenses used to distribute light to the LED light source, but this method has a relatively low utilization rate of the luminous flux of the LED light source, which means that the light with a large luminous angle of the LED light source cannot be used. , resulting in too low light efficiency utilization of lamps

[0004] In addition, there is another type of floodlight total reflection lens, which is improved on the basis of the light-concentrating total reflection lens of the LED light source, such as figure 1 As shown, the exit surface 1 of the lens is made into a dense network of small convex points or a concave spherical structure to achieve the floodlight effect, and some exit surface is frosted. The floodlight effect achieved by these treatment methods is not uniform enough. The light angle is generally small, and due to the frosted or frosted exit surface, the light loss

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