Method for improving color rendering index and color temperature of low-color-temperature cold white light emitting diode (LED) matrix light source

Abstract

The invention discloses a method for improving color rendering index and color temperature of a low-color-temperature cold white light emitting diode (LED) matrix light source. Red LEDs are matched in a cold white LED matrix light source for compensation; and the number of the matched red LEDs is 0 to 15 percent of the total number of the LEDs; or green LEDs in an amount which is 0 to 5 percent based on the total number of the LEDs are matched in an assisting mode. In the method, the LED matrix light source plays a role in high lighting effect of a low-color-temperature cold white LED in application, the overall color rendering index of the matrix is improved, the color temperature of the light source is adjusted, energy conservation, low carbon and emission reduction are achieved, a better environmental lighting and color rendering effect is achieved, and the environmental lighting comfort degree is improved.

Description

Method for Improving Color Rendering Index and Color Temperature of Low Color Temperature Cool White LED Matrix Light Source technical field The invention belongs to the technical field of LED semiconductor solid lighting, and relates to a method for improving the color rendering index and color temperature of a low color temperature cool white LED matrix light source. Background technique As we all know, low color temperature (5000K-10000K) cool white high-power LEDs have higher luminous efficiency. At present, commercial 1W LEDs have achieved a luminous efficacy of 130lm / W, and 1W medium white LEDs have a color temperature of 3700K-5000K. It can only achieve below 100lm / W, while the so-called high color rendering index warm white LWD with Ra≥80, color temperature CCT2600K-3700K, and 1W luminous efficacy can only achieve about 80lm / W. Higher luminous efficiency means more energy saving, and at the same time, the LED lamps produced have less heat generation, higher reliabi...

AI Technical Summary

Problems solved by technology

Although the low color temperature cool white LED has extremely high luminous efficiency, the color rendering index (CRI) is very low, Ra≤70, while the warm white light has a good color rendering index, Ra≥80, but it will lose more than 20% of the photoelectricity. Conversion efficiency

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