Annular composite Fresnel lens semiconductor LED signal light device

Abstract

An annual composite semiconductor light emitting signal lamp with Fresnel lens consists of a basement, a casing on it, a support arranged on the casing vertically, a light emitting board arranged on the support horizontally, multiple light emitting diodes arranged on the said board orderly, lenses arranged on a hood above the said board according to the diodes. The lenses includes a pair, at least, of a primary lens with focus on the center of the light emitting diode and secondary lenses which are located above and below the primary lens respectively. An infrared receiver is arranged on the casing. It can light efficiently.

Description

technical field [0001] The invention relates to a signal lamp for traffic signals, such as signal lights, navigation lights, railway signal lights, aviation obstruction lights, etc., in particular to a signal lamp with a circular compound Frenel lens semiconductor light-emitting diode. Background technique [0002] In the prior art, signal lamps such as signal lights for traffic, navigation lights, railway signal lights, and aviation obstruction lights usually use incandescent lamps as light sources, but the weakness of incandescent light sources is that their luminous efficiency is low. Compared with the semiconductor light source of the same power, the navigation light used in the mobile phone has a lower brightness, which makes it not ideal in use. [0003] With the development of semiconductor light-emitting technology, especially semiconductor light-emitting diodes (hereinafter referred to as LED devices) have high luminous efficiency of chromatographically pure and col...

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Problems solved by technology

[0005] Since the light-emitting board is formed by arranging a plurality of LED devices on the circumference, its light source is on the circumference, but because the focus position of the ordinary Frenel lens currently used outside the light-emitting board is designed at the center of the light-emitting board, however, in There is no light source on the center of the light plate

It can be seen that since there is no real luminous light source at the focal point of the lens, the lens cannot converge the luminous light source that is not at the focal point, so the ordinary Fresnel lens does not have the effect of concentrating light at all, which affects the light of the LED device. Efficiency, so that the signal lamps cannot achieve the brightness they should

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