LED energy-saving traffic light capable of adjusting light automatically
A traffic signal light and automatic dimming technology, which is applied in the direction of light source, electric light source, electroluminescent light source, etc., can solve the problems of reducing the power factor and efficiency of the lamp, affecting the performance of the LED signal light, and the high harmonic content of the pulse current, etc., to achieve good Dimming performance, overcoming flicker phenomenon, and the effect of fewer external components
Active Publication Date: 2016-08-03
南京创固交通设施有限公司
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Problems solved by technology
Currently, LED signal lamps that use AC mains usually require rectification and filtering, and filtering requires large-capacity capacitors, which are large in size and short in life, and the harmonic content of pulse current formed by rectification and filtering is large, which reduces the power factor and efficiency of lamps. , affecting the performance of LED signal lights
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[0023] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention. invention.
[0024] Please see figure 1 , an automatic dimming LED energy-saving traffic signal lamp, including: input protection [1], rectification unit [2], AC direct drive controller [3], photosensitive sensor [4], dimming control unit [5], energy buffer Unit [6], LED lighting unit [7]. Among them: input protection [1] provides over-current or short-circuit protection and absorbs surge voltage for LED energy-saving traffic lights, and forms an electrical connection with the rectification unit [2]; the rectification unit [2] performs full-wave rectification of the AC input voltage to provide AC The direc...
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The invention discloses an LED energy-saving traffic light capable of adjusting light automatically. The LED energy-saving traffic light comprises an input protector (1), a rectification unit (2), an alternating-current direct-drive controller (3), a photosensitive sensor (4), a light adjustment control unit (5), an energy buffer unit (6) and an LED light-emitting unit (7). According to the magnitude of the instantaneous value of pulsating voltage obtained after rectification, the alternating-current direct-drive controller drives LEDs of different groups to emit light. The light adjustment control unit conducts voltage change according to signals of the photosensitive sensor (4) and generates a proper voltage signal and provides the voltage signal to the alternating-current direct-drive controller, and the alternating-current direct-drive controller controls brightness variation of the LED light-emitting unit. The energy buffer unit is used for smoothing brightness of the LEDs and lowering the flicker degree of the LEDs. The LED energy-saving traffic light has the advantages that no large-capacity filter capacitor is needed, few external elements are used, the power factor and efficiency are high, the energy buffer unit is arranged, the phenomenon that an alternating-current direct-drive LED flickers is overcome, light adjusting performance is good, and the traffic light is beneficial to energy conservation.
Description
technical field [0001] The invention relates to a traffic signal lamp, in particular to an automatic dimming LED energy-saving traffic signal lamp, which belongs to the technical field of energy-saving road traffic lighting. Background technique [0002] LED (Light Emitting Diode) is a new type of light source, which has the advantages of low power consumption, high brightness, small size, light weight, and long life. Traffic lights using LEDs as light sources have the advantages of good visibility, energy saving, fast response, etc., and gradually replace incandescent lamps and low-voltage tungsten halogen lamps to make road traffic lights. [0003] The application of LED in traffic signal lights is developing very rapidly. Due to the advantages of environmental protection, energy saving, and long life of LED itself, there is still a lot of space for the application of LED in the field of transportation. However, the current application of high-power LEDs needs to solve th...
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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/10H05B45/37Y02B20/30
Inventor 涂金龙徐有军李艳霞何叶
Owner 南京创固交通设施有限公司