Variable-color-temperature full-spectrum LED light source and lamp

An LED light source, full-spectrum technology, applied in the field of full-spectrum light sources and lamps, can solve the problems of complex control, limited spectral consistency, and high cost, and achieve the effect of meeting color temperature requirements, reducing costs, and achieving good continuity.

Active Publication Date: 2021-12-03
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method needs to convert materials through phosphor powder, which involves a strict ratio of phosphor powder ratio or the preparation of special materials, and is easily affected by mutual absorption between materials and environmental conditions. It is difficult to realize the full-spectrum solution, and spectral consistency exists. certain limit
At the same time, for the above-mentioned method of obtaining a full spectrum through phosphor excitation, the spectrum is fixed, and the color temperature conditions that can be achieved by the same light source are fixed and cannot be adjusted, which cannot meet the application requirements of variable color temperature
Another method is to use as many monochromatic LEDs as possible to mix different bands. When there are enough channels, a full-spectrum LED light source with good continuity and high similarity to natural sunlight can be obtained, but the channel is too large. More will result in high cost and complicated control
At the same time, as the temperature rises, the attenuation of LED light intensity in each band is inconsistent, resulting in changes in the mixed spectrum

Method used

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  • Variable-color-temperature full-spectrum LED light source and lamp
  • Variable-color-temperature full-spectrum LED light source and lamp
  • Variable-color-temperature full-spectrum LED light source and lamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1, such as image 3 As shown, a full-spectrum light source includes a light source module (10) and a control module (20). As an example, each light-emitting unit (100) is an LED light source, and it is easy to select a light source combination capable of realizing a full-spectrum solution at a target color temperature, so that the light source module (10) emits light that meets requirements.

[0040] In this embodiment, 4000 K, 5000 K, and 6000 K are used as target color temperatures, and the achievable color temperature range is 4000 K-6000 K. Within the above color temperature range, there are multiple satisfying color coordinate points for each target color temperature, that is, the effective color temperature area, such as figure 2 As shown, any color coordinate point in each effective color temperature area can be selected as the target color coordinate point. Preferably, the points on the blackbody radiation curve and the color coordinate points corresp...

Embodiment 2

[0059] Example 2, such as image 3 As shown, a full-spectrum LED light source, a light source module (10) and a control module (20), the structure of which is basically similar to that of Embodiment 1. The composition of the control module (20) is completely consistent with that of Embodiment 1.

[0060] Consistent with Example 1, in this example, with 4000 K, 5000 K, and 6000 K as the target color temperature, the achievable color temperature range is 4000 K-6000 K, and the maximum color temperature CCT max It is 6000 K, corresponding to the point (0.3221, 0.3318) on the color coordinates, and the minimum color temperature CCT min It is 4000 K, corresponding to the point (0.3796, 0.3797) on the color coordinates.

[0061] The difference from Embodiment 1 is that the composition of the light emitting unit (100) of the light source module (10) is different from Embodiment 1. In this embodiment, the four types of light-emitting units specifically include light-emitting unit 1...

Embodiment 3

[0068] Example 3, such as Image 6 As shown, a full-spectrum LED light source is composed of a light source module (10) and a control module (20), and its structure is basically similar to that of Embodiment 1.

[0069] Consistent with Example 1, in this example, with 4000 K, 5000 K, and 6000 K as the target color temperature, the achievable color temperature range is 4000 K-6000 K, and the maximum color temperature CCT max It is 6000 K, corresponding to the point (0.3221, 0.3318) on the color coordinates, and the minimum color temperature CCT min It is 4000 K, corresponding to the point (0.3796, 0.3797) on the color coordinates.

[0070] The difference from Embodiment 1 is that the light source module includes five light emitting units (100), specifically a combination of three PCLED light sources (101) and two monochromatic LED light sources (102). The five light-emitting units specifically include light-emitting unit 1, light-emitting unit 2, light-emitting unit 3, light-...

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Abstract

The invention belongs to the technical field of LED illumination, and particularly relates to a variable-color-temperature full-spectrum LED light source and a lamp. The full-spectrum LED light source comprises four to six light-emitting units which are respectively used for emitting light with certain intensity, and emergent light which meets variable color temperature and has full-spectrum characteristics is obtained after the light is mixed; each light-emitting unit can be independently controlled, and the light-emitting intensity is adjustable; the spectrums of the light-emitting units have different spectral power density distributions; the light-emitting unit comprises monochromatic light LEDs and a certain number of PCLEDs; and the number of types adopted by the PCLED light sources is related to the total number of types of the adopted light-emitting units. The variable-color-temperature full-spectrum light source with good continuity and high color rendering can be obtained, the number of LED types can be effectively reduced, and the cost is reduced; and the controllability of the full-spectrum light source is higher, the color temperature requirements under different illumination conditions can be met, and the effect closer to natural sunlight is achieved visually.

Description

technical field [0001] The invention belongs to the technical field of LED lighting, and in particular relates to a full-spectrum light source and a lamp with variable color temperature. Background technique [0002] The spectrum of natural sunlight is continuous in each band, and compared with traditional artificial light sources, it can more truly restore various color information in nature. At the same time, sufficient natural sunlight can have a positive effect on the human body's psychological and emotional aspects. Sufficient light stimulation during the day can effectively regulate the human body's circadian rhythm, which is beneficial to physical and mental health. Natural sunlight can also benefit plant growth and increase crop yields. During the day, the natural sunlight color temperature and visual color change significantly. On a clear day, the natural sunlight color temperature at sunrise and sunset is low, below 3500 K, showing warm white; the color temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21K9/64F21S10/02H01L25/075
CPCF21K9/64F21S10/02H01L25/075Y02P60/14
Inventor 戴奇黄滢滢李山山
Owner FUDAN UNIV
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