Optical device and preparation method thereof

Abstract

The invention provides an optical device, which comprises a packaging structure and an LED chip arranged on the packaging structure, wherein the LED chip comprises at least two LED sub-chips, and the packaging structure comprises an excitation body. According to the invention, a first continuous spectrum formed by emitting light in different wavelength ranges through at least two LED sub-chips is partially overlapped with a second continuous spectrum formed by emitting light in other different wavelength ranges through an excitation body, and the first continuous spectrum is composed of a plurality of sub-continuous spectrums which are partially overlapped in sequence, so that the blue light proportion of the LED chip is reduced while the spectral range is expanded, the variation amplitude of the wave crest and the wave trough of the first continuous spectrum is reduced, the optical device can emit the continuous spectrum similar to sunlight, and the sunlight is restored to the maximum extent. The invention also provides a preparation method of the optical device.

Description

technical field [0001] The invention relates to the field of lighting. In particular, it relates to optical devices and methods for their preparation. Background technique [0002] Lighting sources, including light emitting diodes (Light Emitting Diode, LED) are all artificial light sources, and sunlight is the basis of healthy lighting for humans and other organisms. The nourishment and evolution of all things depend on sunlight, so the ideal artificial light source should be It can restore sunlight as much as possible. [0003] However, the light emitted by the LED light source in the prior art cannot form a continuous spectrum, and the peak and trough fluctuations are very large, the color rendering index is low, and the human eyes cannot recognize and illuminate objects. In addition, most of the mainstream LED light sources in the prior art are blue-light chip-excited phosphors. Due to the high peak and proportion of blue light, it is extremely harmful to the human eye...

AI Technical Summary

Problems solved by technology

[0003] However, the light emitted by the LED light source in the prior art cannot form a continuous spectrum, and the peak and trough fluctuations are very large, the color rendering index is low, and the human eyes cannot recognize objects and illuminate objects.

In addition, most of the mainstream LED light sources in the prior art are blue-light chip-excited phosphors. Due to the high peak and proportion of blue light, it is extremely harmful to the human eye, and the spectral range is too narrow, and the drop in the short-wave and long-wave bands is large. , there is almost no spectrum, and it is not a continuous spectrum, which cannot be close to the full spectrum of sunlight

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