Optical lens used for LED (light-emitting diode) lamp and LED lamp

Abstract

The invention discloses an optical lens used for an LED (light-emitting diode) lamp and the LED lamp. The optical lens comprises a light guide part and a light-emitting part; the light guide part is provided with a cavity for containing multiple LED lamp beads; the light guide part is provided with a first surface and a second surface which are opposite; each of the first surface and the second surface is a fully reflecting surface capable of performing total internal reflection on light emitted from the LED lamp beads contained in the cavity to conduct the light to the light-emitting part; the light-emitting part is provided with a light-emitting face and emits the light conducted by the light guide part. Compared with the traditional optical lens, the optical lens provided by the invention has the characteristics that the light emitted from the LED lamp beads is conducted to the light-emitting part by the light guide part, and different optical requirements are met by changing the height of the light guide part and the curved surface structure of the light-emitting part; the structure is simple, and the assembly process requirement is low; the defect that the assembly precision requirement is high due to the fact that the traditional optical lens needs to meet the optical requirement is greatly overcome; the optical lens has a practical significance.

Description

technical field [0001] The invention relates to the field of optics, in particular to an optical lens for an LED lamp and the LED lamp. Background technique [0002] LED has superior characteristics such as long life, environmental protection and energy saving. At present, the use of LED as a lighting source has been vigorously promoted and applied. However, due to the Lambertian light emission characteristics of a single LED itself, it cannot meet the requirements of actual lighting for light distribution of lamps and lanterns. It is necessary to use lenses for secondary optical treatment on multiple LEDs to meet the requirements for use. At present, most of the lenses used in LED lamps are designed for secondary light distribution based on a single LED. The biggest defect of this method is that the light-emitting angle of LED lamps is small (less than 150 degrees), which cannot be compared with traditional incandescent lamps. Compared with the wide light distribution angl...

AI Technical Summary

Problems solved by technology

However, due to the Lambertian light emission characteristics of a single LED itself, it cannot meet the requirements of actual lighting for light distribution of lamps and lanterns. It is necessary to use lenses for secondary optical treatment on multiple LEDs to meet the use requirements.

At present, most of the lenses used in LED lamps are designed for secondary light distribution based on a single LED. The biggest defect of this method is that the light-emitting angle of LED lamps is small (less than 150 degrees), which cannot be compared with traditional incandescent lamps. Compared with the wide light distribution angle of energy-saving lamps, it cannot meet the needs of actual use

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