LED light-emitting device with variable color temperature and implementation method thereof

Abstract

The invention relates to an LED light-emitting device with variable color temperature and an implementation method thereof. The LED light-emitting device comprises three LED banks with different colors, a controller and a temperature sensor; a first LED bank is a white LED light, a second LED bank is a yellow LED light and a third LED bank is a red LED light; each LED bank comprises at least one LED light; the temperature sensor can transfer the ambient temperature to the controller; the controller finds out the set intervals of the temperature according to the comparison results and adjusts the light intensity proportions of the three LED banks according to the voltage control parameters of the white LED light, the yellow LED light and the red LED light so as to realize automatic variation of color temperature along with the variation of the ambient temperature; the voltage control parameters correspond to the response voltage parameters of the temperature sensor; three banks of different colors are adopted, especially the red light is supplemented, thus greatly improving color rendering of the light-emitting device and ensuring the spectrum of the device to be closer to the natural light.

Description

technical field [0001] The invention relates to an LED light emitting device, in particular to an LED light emitting device with variable color temperature whose color temperature changes with the change of the external environment temperature and its realization method, belonging to the field of electronic technology. Background technique [0002] White LEDs with a single wavelength do not exist. The white light LED light source is generally realized by coating the yellow light phosphor on the blue LED chip, and the yellow light generated by the blue light excited by the yellow light phosphor is synthesized with the existing blue light to form the required white light. The color temperature of the white light emitted by the LED depends on the synthesis ratio of yellow light and blue light. Once the fluorescent glue is applied to the surface of the blue LED chip, the color temperature has been determined and cannot be changed. Usually, the white light LED light source is pro...

AI Technical Summary

Problems solved by technology

However, in real lighting, we need lighting with different color temperatures depending on the temperature or environment. For example, in winter, we hope that the light emitted by the lamp is warm-toned, while in summer it can emit cool-toned light; another example is a cool-toned light in the morning. , and it is warm at night. At present, it can only be adjusted or replaced with LED lights of different colors according to needs. There is no LED light with a color temperature that can change with the ambient temperature, which cannot meet people's requirements.

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