Dimmable LED illumination system with temperature protection function
A technology of LED lighting and protection functions, applied in lighting devices, fixed lighting devices, lighting and heating equipment, etc., can solve problems such as color shift, achieve high adjustment accuracy and speed, and reduce upgrade costs
Inactive Publication Date: 2011-06-15
ZHEJIANG UNIV
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Problems solved by technology
[0003] The invention provides an LED lighting system capable of realizing no color shift temperature protection and being compatible with currently commonly used digital dimming, which solves the disadvantage of color shift caused by the traditional LED lighting system with temperature protection function when operating at reduced current, and improves The power supply efficiency of LED light source prolongs the service life of LED light source
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[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0030] like figure 1 Shown is a schematic structural diagram of the dimmable LED lighting system with temperature protection function of the present invention. The structure includes: a voltage converter, an LED array, a current detection module, a dimming switch, a temperature sensor, a current reduction and dimming controller, and an overvoltage and open circuit protection module.
[0031] Among them, the main power loop is composed of voltage converter, LED array and current detection module. The input terminal of the voltage converter accepts the power supply from the power supply, and generates an output voltage higher or lower than the power supply voltage of the LED array at the output terminal, and the output voltage is applied to the input terminal of the LED array to generate a current and light the LED, and the current value The si...
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The invention discloses a dimmable LED illumination system with temperature protection function, which comprises an LED array, a voltage converter current-detecting module, an over-voltage and open-circuit protection module, a dimming switch, a current reduction and dimming controller and a temperature sensor. The current reduction and dimming controller receives a working temperature signal of the LED array monitored by the temperature sensor and controls the on and off of the dimming switch; and the dimming switch controls the on and off of the working current of the LED array so as to achieve the effect of controlling the work of the LED array according to the working temperature of the LED array. The dimmable LED illumination system does not cause color offset and has higher adjustingprecision and speed. In addition, the temperature adjusting mode of the LED array provided by the invention is compatible with a current popular digital dimming mode, so the system can be improved based on the primary equipment, and the upgrade cost is reduced.
Description
technical field [0001] The invention relates to the field of power electronics, in particular to a dimmable LED lighting system with temperature protection function. Background technique [0002] At present, as people pay more and more attention to green energy saving, more and more new technologies and new technologies are applied to daily life. In terms of outdoor lighting, high-brightness white light diodes (LEDs) tend to gradually replace traditional light sources due to their advantages such as high brightness, long life, simple driving equipment, and similar light efficiency to energy-saving lamps. However, outdoor lighting also has its particularity: because the outdoor is affected by environmental factors such as sunlight and rain all year round, the temperature fluctuates greatly, and because the LED is sealed in the lampshade, the temperature rise relative to the ambient temperature caused by its own heating is basically fixed. , so the temperature of the LED will...
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IPC IPC(8): F21S8/00F21V23/00H05B37/02F21Y101/02
Inventor 吴晓波孙越明叶智豪赵梦恋杨鹏陆佳颖
Owner ZHEJIANG UNIV