White LED lamp color temperature and luminous flux continuous adjusting method

Abstract

The invention discloses a white LED lamp color temperature and luminous flux continuous adjusting method, which comprises the following steps: firstly placing two UVLED chips A and B at the center of a lamp barrel coated with trichromatic phosphor; and respectively adjusting the luminous intensity of the two UVLED chips for the excitation of the trichromatic phosphor so as to realize the continuous adjusting of the color temperature and the luminous flux, wherein the wave length of the ultraviolet light emitted by the UVLED chip A is a nm, the wave length of the ultraviolet light emitted by the UVLED chip B is b nm, the lights with the wave length respectively being a nm and b nm are all within the ultraviolet light waveband, and a is not equal to b. In addition, the trichromatic phosphor must satisfy the following requirements: green powder has the same adsorption and emission intensity to the lights with the wave length respectively being a nm and b nm; blue powder is strong in adsorbing the light with the wave length being b nm, and is weak in adsorbing the light with the wave length being a nm; and red powder is strong in adsorbing the light with the wave length being a nm, and is weak in adsorbing the light with the wave length being b nm, wherein the lights with the wave length respectively being a nm and b nm are all within the ultraviolet light waveband.

Description

Technical field: [0001] The invention relates to the technical field of LED light adjustment, in particular to a method for continuously adjusting the color temperature and luminous flux of a white LED light. Background technique: [0002] Right now, our artificial lighting is generally static and less dynamic than natural lighting. However, dynamic lighting can overcome this shortcoming. The so-called dynamic lighting is lighting that can control the intensity of lighting and the level of color temperature. For example, in the early morning, the lighting system provides high lighting color temperature, and the cool color light makes people who enter the office energetic to start the day's work; at lunch time, the color temperature is lowered, and the warm color light helps people relax; people usually feel sleepy after lunch , At this time, the color temperature rises to avoid taking a nap after lunch, etc. are all dynamic lighting, that is, the application of a lighting ...

AI Technical Summary

Problems solved by technology

However, since the forward voltage and light output of the three colors of LED chips are different, in addition, their temperature characteristics and light maintenance characteristics are also different, and the control circuit must have light output signal sampling and feedback functions for dynamic control, so that the white light emitted The coordinates of the chromaticity points remain unchanged, so this method has high requirements for circuit design and high cost, and has not been practically applied in large quantities.

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