Fluorescent-powder-free white-light LED and fluorescent-powder-free white-light LED light-emitting module

Abstract

The invention provides a fluorescent-powder-free white-light LED and a fluorescent-powder-free white-light LED light-emitting module. The fluorescent-powder-free white-light LED comprises a substrate, a buffer layer, an n-type layer, an active layer and a p-type layer, wherein the buffer layer, the n-type layer, the active layer and the p-type layer are arranged on the substrate in sequence. The active layer comprises a long wavelength light-emitting region and a short wavelength light-emitting region. The fluorescent-powder-free white-light LED light-emitting module comprises the fluorescent-powder-free white-light LED and a driving circuit used for generating driving signals, and the driving circuit can generate the alternating-current driving signals with the frequency not lower than 200 Hz. The fluorescent-powder-free white-light LED and the fluorescent-powder-free white-light LED light-emitting module solve the problems that according to existing mainstream white-light LEDs (blue light excites yellow fluorescent powder), the fluorescent powder is short in service life, high in color temperature, low in color rendering index and the like, and the fluorescent-powder-free single-chip LED can emit white light.

Description

technical field [0001] The invention relates to the technical field of LED lighting, in particular to a phosphor-free white light LED and an LED light-emitting module. Background technique [0002] Semiconductor lighting technology based on white light-emitting diodes (Light-Emitting Diode, LED) has unique advantages such as high luminous efficiency, long life, and environmental protection. It is recognized as a revolution in lighting technology and another major contribution of semiconductor science and technology to human life. . LEDs are used in a wide range of fields, including liquid crystal display backlights, display screens, outdoor lighting, stage lights, signal lights, special lighting, automotive headlights, and other fields. With the maturity of technology, LEDs will also penetrate into general lighting such as indoor lighting in the future. field. [0003] At present, there are three main technical routes for white LEDs: the first is that blue LEDs excite yell...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of short lifespan, high color temperature and low color rendering index of white LEDs in the prior art, the present invention provides a phosphor-free white LED and LED light-emitting module. The white LED and LED light-emitting module do not need to use fluorescent light powder, and can get higher white light color rendering index and lower color temperature

Images