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Method for increasing LED luminous efficiency

A technology of luminous efficiency and heating element, applied in the field of LED lighting, can solve problems such as the decline of LED luminous efficiency, and achieve the effect of suppressing light decay, ensuring normal service life, and improving luminous efficiency

Active Publication Date: 2011-05-11
GUIZHOU GUANGPUSEN PHOTOELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, LED light-emitting diodes work for a long time under high-power conditions, and the luminous efficiency of LEDs will drop rapidly due to excessive temperature, forming the so-called "light decay".

Method used

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  • Method for increasing LED luminous efficiency
  • Method for increasing LED luminous efficiency
  • Method for increasing LED luminous efficiency

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but not as a basis for limiting the present invention.

[0017] Example. A method for improving the luminous efficiency of an LED, characterized in that the current for driving the LED is controlled by a constant current diode, and at the same time the LED is used as a heat source for the constant current diode, and when the operating temperature of the LED exceeds the control temperature, the ambient temperature of the constant current diode is heated Above the prohibition temperature, the rated power of the constant current diode to the LED output decreases with the increase of the ambient temperature, which inhibits the temperature of the LED from continuing to rise, thereby avoiding the reduction of the luminous efficiency of the LED due to overheating, and the gap between the LED and the constant current diode Form a working mode of mutual feedback a...

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Abstract

The invention discloses a method for increasing LED luminous efficiency, which is characterized in that a constant current diode is used for controlling and driving the current of an LED, the LED is used as the heat source of the constant current diode, and a mutual feedback regulative work mode is formed between the LED and the constant current diode under the affect of the heat source on the environmental temperature of the constant current diode. Through the method provided by the invention, an LED working circuit can be automatically adjusted, the luminous efficiency can be prevented from decreasing under over-high LED working temperature and the service life of the LED in normal use can be ensured.

Description

technical field [0001] The invention relates to a method for improving LED luminous efficiency, belonging to the technical field of LED lighting. Background technique [0002] LED light-emitting diode lighting has the advantages of high efficiency and energy saving. The luminous efficiency of most current LED lighting lamps can exceed 70LM / W, which is more energy-saving than traditional energy-saving lamps. Theoretically, the efficiency of LED green light can be as high as 683LM / W; the theoretical efficiency of white LED can also reach 182.45LM / W, so there is a huge room for improving LED lighting efficiency. However, LED light-emitting diodes work for a long time in a high-power state, and the luminous efficiency of the LED will drop rapidly due to excessive temperature, forming the so-called "light decay". Contents of the invention [0003] The purpose of the present invention is to provide a method for improving LED luminous efficiency. It can automatically adjust the...

Claims

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Application Information

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IPC IPC(8): H05B37/02
Inventor 张继强张哲源
Owner GUIZHOU GUANGPUSEN PHOTOELECTRIC