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Light regulation method of white light emitting diode

A technology of light-emitting diodes and diodes, applied in the direction of electroluminescent light sources, light sources, electric light sources, etc., can solve the problem of synchronous realization of the blue light hazard and color rendering of white light-emitting diodes, affect the color reproduction of white light in lighting, and reduce the color rendering of white light in lighting Sexuality and other issues, to achieve better color rendering effect, low blue light hazards, and reduce blue light hazards

Active Publication Date: 2019-07-05
PEKING UNIV +1
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Problems solved by technology

Among them, white light-emitting diodes are very common in daily life, but the blue light hazard and color rendering of white light-emitting diodes are difficult to realize simultaneously in the existing market
According to the national standard "Standards for Photobiological Safety of Lamps and Lamp Systems" (GB / T20145-2006), short-wavelength (about 410nm-480nm) light is more harmful to the human retina, among which blue light with a wavelength of 435nm-440nm The harm to the retina is the greatest, so the mainstream LED white light source technology has caused the hidden danger of blue light hazards. In addition, filtering the blue light component in the spectrum is a common method to reduce the harm of blue light, but this will affect the color reproduction of white light to blue, reducing the Color rendering of lighting white light

Method used

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  • Light regulation method of white light emitting diode
  • Light regulation method of white light emitting diode
  • Light regulation method of white light emitting diode

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Embodiment Construction

[0026] The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0027] see Figure 1-Figure 6 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings in this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with the technology, and are not used to limit the implementation of the present invention. Restricted conditions, it does not have technical substantive significance, ...

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Abstract

The invention provides a light regulation method of a white light emitting diode. The method comprises the steps of: measuring spectral power of a red light-emitting diode, a yellow light-emitting diode, a blue light-emitting diode and a green light-emitting diode which independently emit light in a rated current working state; calculating the relative light mixing ratio of the red light-emittingdiode, the yellow light-emitting diode, the blue light-emitting diode and the green light-emitting diode; and according to the relative light mixing ratio, employing the control unit to output controlsignals with different duty ratios to the red light-emitting diode, the yellow light-emitting diode, the blue light-emitting diode and the green light-emitting diode, wherein the peak wavelength of the red light-emitting diode is between 670 nm and 700 nm. The white light emitting diode prepared by the method has high color rendering, low blue light hazard and the adjustable color temperature, and can be used for obtaining the white light emitting diode with the high color rendering and the low blue light hazard at any color temperature.

Description

technical field [0001] The invention relates to the technical field of light-emitting diodes, in particular to a dimming method for white light-emitting diodes. Background technique [0002] Light Emitting Diode (LED) is a component made of semiconductor material. Because it can convert electrical energy into light, it is a kind of tiny solid-state light source, which not only has the advantages of small size, long life and low driving voltage. , Fast response rate and excellent shock resistance, and can meet the design requirements of light, thin, short and small, and are widely used in various products in daily life. Among them, white light emitting diodes are very common in daily life, but the blue light hazard and color rendering of white light emitting diodes are difficult to achieve simultaneously in the existing market. According to the national standard "Photobiological Safety Standard for Lamps and Lamp Systems" (GB / T20145-2006), light with short wavelengths (about...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/50H05B45/00
Inventor 陈志忠聂靖昕焦飞康香宁党卫民童玉珍张国义沈波唐军刘亚柱齐胜利潘尧波
Owner PEKING UNIV
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