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Light-emitting device and lamp having the same

A light-emitting device, light-emitting wavelength technology, applied in the field of optics, can solve the problem that the color rendering index and luminous efficiency cannot be guaranteed at the same time

Inactive Publication Date: 2019-04-19
FOSHAN NATIONSTAR OPTOELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a light-emitting device and a lamp with it, so as to solve the problem that the light-emitting device using fluorescent powder cannot guarantee the color rendering index and luminous efficiency at the same time in the prior art

Method used

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  • Light-emitting device and lamp having the same
  • Light-emitting device and lamp having the same
  • Light-emitting device and lamp having the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The technical scheme of the structure of the light-emitting device in this embodiment is as follows:

[0043] The light emitting device of this embodiment includes a light source, a first fluorescent material layer, a second fluorescent material layer and a transparent material layer, the first fluorescent material layer is arranged on the light emitting side of the light source, and the second fluorescent material layer is arranged on the first fluorescent material layer away from On one side of the light source, the transparent material layer is located between the first fluorescent material layer and the second fluorescent material layer. Among them, the first fluorescent material is red fluorescent powder, with a luminous peak wavelength of 620nm-640nm, and a particle size of 20μm; the second fluorescent material is yellow-green fluorescent powder, with a luminous peak wavelength of 530nm-540nm, and a particle size of 35μm; the first fluorescent material The weight ...

Embodiment 2

[0045] The difference between the light emitting device of this embodiment and Embodiment 1 is:

[0046] The particle size of the first fluorescent material is 30 μm, and the particle size of the second fluorescent material is 50 μm.

Embodiment 3

[0048] The difference between the light emitting device of this embodiment and Embodiment 1 is:

[0049] The particle size of the first fluorescent material is 5 μm, and the particle size of the second fluorescent material is 10 μm.

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Abstract

The present invention provides a light-emitting device and a lamp having the same. The light-emitting device comprises: a light source; a first fluorescent material layer, wherein at least part of thefirst fluorescent material layer is disposed on the light emitting side of the light source, the first fluorescent material layer is used for absorbing the light emitted by the light source and emitting red light, and the light emitting wavelength of the first fluorescent material layer is in a range of 620-640nm; a second fluorescent material layer arranged at one side, far away from the light source, of the first fluorescent material layer and used for absorbing the light emitted by the light source and emitting second-color light different from the red light, wherein the light emitting wavelength of the second fluorescent material layer is smaller than the light emitting wavelength of the first fluorescent material layer, the fluorescent powder is layered to allow the first fluorescentmaterial layer close to the power source to firstly absorb the emitting light of the light source, since the light emitting wavelength of the first fluorescent material layer is a red short wave, thelight emitted by the second fluorescent material layer is absorbed by the first fluorescent material layer so as to greatly improve the device brightness.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a light emitting device and a lamp with the same. Background technique [0002] As people's requirements for light quality increase, more and more applications will increase the requirements for light color of light-emitting devices, and the demand for color rendering index above 90 (R90) is also gradually increasing; however, for the luminescence that can achieve above R90 Due to the low luminous efficiency of the light emitting device, the application range of the light emitting device is limited. [0003] At the same time, for light-emitting devices that use phosphor as a light-emitting material, due to the limitation of the phosphor band, the color rendering index can only be R95 / 96 at a high color temperature such as 6500K, and blue-green phosphors are also used in the prior art. The color rendering index is improved by increasing the spectrum of 480-520nm, but because the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50
Inventor 潘利兵李玉容谢志国李福海刘丽张雪杨璐
Owner FOSHAN NATIONSTAR OPTOELECTRONICS CO LTD