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Color-temperature-adjustable color-enhanced LED lamp

A technology for LED lamps and color enhancement, which is applied to optical elements used to change the spectral characteristics of emitted light, components of lighting devices, semiconductor devices of light-emitting elements, etc., which can solve the problem of color coordinate deviation from the center line of white light and color rendering index Changes, lack of red color rendering of LED lights, etc., to meet the lighting needs

Pending Publication Date: 2019-09-20
ZHEJIANG SUNSHINE MEIJIA LIGHTING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the color rendering index of LED lights on the market is generally 80. Compared with natural light, the color of objects is still different, especially for some LED lights with different color temperatures, there is a big difference in the color rendering of the illuminated objects, such as high LED lamps with color temperature (6500K) lack red color rendering, and LED lamps with low color temperature (2700K) lack blue or green color rendering. LEDs or green or blue LEDs are used to improve color rendering, and the color temperature is adjusted by adjusting the light intensity of these single-color LEDs, but this is easy to cause the color coordinates to deviate from the center line of white light, and at the same time, it is easy to adjust the color rendering index when adjusting different color temperatures. cause major changes

Method used

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  • Color-temperature-adjustable color-enhanced LED lamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In the LED lamp proposed in this embodiment, the wavelength of the blue LED chip in the high color temperature LED white light lamp bead 21 is 447nm, and the green phosphor powder in the high color temperature LED white light lamp bead 21 is selected from (Ba,Sr ) 2 SiO 4 : Eu, the red phosphor powder in the high color temperature LED white light lamp bead 21 selects (Ca, Sr) AlSiN whose peak wavelength of the emission peak is 635nm 3 :Eu CaAlSiN with emission peak wavelength at 650nm 3 : mixed powder of Eu; the wavelength of the blue LED chip in the low color temperature LED white light lamp bead 22 is 453nm, and the green phosphor powder in the low color temperature LED white light lamp bead 22 is β-Sialon:Eu with a peak wavelength of 535nm. The peak wavelength of the emission peak is 525nm (Ba,Sr) 2 SiO 4 : Mixed powder of Eu, the red phosphor powder in the low color temperature LED white light lamp bead 22 is CaAlSiN whose emission peak peak wavelength is 650nm ...

Embodiment 2

[0036] In the LED lamp proposed in this embodiment, the wavelength of the blue LED chip in the high color temperature LED white light bead 21 is 447nm, and the green phosphor in the high color temperature LED white light bead 21 is Ba with a peak emission peak wavelength of 525nm. 3 Si 6 o 12 N 2 : Eu, the red phosphor powder in the high color temperature LED white light lamp bead 21 is selected from (Ba, Sr, Ca) whose peak wavelength of the emission peak is 630nm 2 Si 5 N 8 : Eu; the wavelength of the blue LED chip in the low color temperature LED white light lamp bead 22 is 453nm, and the green phosphor powder in the low color temperature LED white light lamp bead 22 is β-Sialon:Eu with a peak wavelength of emission peak of 535nm, low color temperature LED The red phosphor powder in the white light bead 22 is CaAlSiN whose emission peak wavelength is 650nm 3 :Eu.

Embodiment 3

[0038] In the LED lamp proposed in this embodiment, the wavelength of the blue LED chip in the high color temperature LED white light lamp bead 21 is 447nm, and the green phosphor powder in the high color temperature LED white light lamp bead 21 is selected from (Ba,Sr ) 2 SiO 4 : Eu, the red phosphor powder in the high color temperature LED white light lamp bead 21 selects the K with the peak wavelength of the emission peak as 631nm 2 SiF 6 :Mn 4+ with a peak wavelength of the emission peak at 632nm K 2 TiF 6 :Mn 4+ The wavelength of the blue LED chip in the low color temperature LED white light lamp bead 22 is 453nm, and the green phosphor powder in the low color temperature LED white light lamp bead 22 is β-Sialon:Eu with an emission peak whose peak wavelength is 535nm. The peak wavelength is 525nm (Ba,Sr) 2 SiO 4 : Mixed powder of Eu, the red phosphor powder in the low color temperature LED white light lamp bead 22 is CaAlSiN whose emission peak peak wavelength is ...

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Abstract

The invention discloses a color-temperature-adjustable color-enhanced LED lamp; the LED lamp comprises a high-color-temperature LED white light lamp bead and a low-color-temperature LED white light lamp bead, wherein the high-color-temperature LED white light lamp bead and the low-color-temperature LED white light lamp bead are all formed by packaging blue-light LED chips by adopting mixed fluorescent powder, and the mixed fluorescent powder is formed by mixing green fluorescent powder and red fluorescent powder; the high-color-temperature LED white light lamp bead and the low-color-temperature LED white light lamp bead both have a blue emission peak, a green emission peak and a red emission peak separately; and the peak wavelengths of the blue emission peak, the green emission peak and the red emission peak of the high-color-temperature LED white light lamp bead are correspondingly lower than the peak wavelengths of the blue emission peak, the green emission peak and the red emission peak of the low-color-temperature LED white light lamp bead respectively. The LED lamp has the advantages that in different color temperature ranges, the color of an irradiated object can be enhanced.

Description

technical field [0001] The invention relates to an LED lamp, in particular to a color enhanced LED lamp with adjustable color temperature. Background technique [0002] LED lights have been widely used in various lighting, such as general lighting, office lighting, commercial lighting, automotive lighting, plant lighting, etc. With the rapid development of LED lighting, the light efficiency and color rendering of LED lights have made great progress. The light efficiency has been much higher than that of traditional lighting. The development of light efficiency has promoted the improvement of color rendering requirements. The significant index gradually develops towards 90 and higher. The further development of LED lighting will tend to the improvement of light quality and the development of some areas with special requirements, such as healthy lighting and improvement of color rendering quality. In some lighting places, the requirements for the color of objects are differe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L25/075H01L33/48H01L33/50F21V9/32F21Y115/10
CPCH01L25/0753H01L33/483H01L33/505F21V9/32F21Y2115/10
Inventor 曾小青李阳
Owner ZHEJIANG SUNSHINE MEIJIA LIGHTING CO LTD