LED lamp based on multi-layer remote phosphor film

Abstract

The present invention discloses a LED lamp based on a multi-layer remote phosphor film. The lamp comprises a LED light source, a structure piece, a light-permeable medium and a phosphor film. The phosphor film is a multi-layer structure, and the properties of each layer of phosphor are different. After the light emitted by the LED light source passes through the multi-layer phosphor film, photons excite the phosphor with different properties to generate the photons with different wave lengths, and the other parts of the photons have no change of the wavelength through passing through the phosphor layer. The mixture with appropriate proportion of the photons with different wavelengths generates the light required by the final production of the LED lamp. Through controlling the materials, the ratio, the thickness, the number of layers and the combination modes of the phosphor film, the LED lamp based on multi-layer remote phosphor film realize the integral control of the LED lamp spectrum energy distribution by combining the combination of different LED chips and the driving current of the chip in the LED light source.

Description

technical field [0001] The invention relates to an LED lamp, and in particular to an LED lamp based on a multi-layer remote phosphor film. Background technique [0002] At present, the realization of white light LED mainly adopts the method of exciting yellow phosphor powder by blue chip, and usually the phosphor powder is mixed with silica gel evenly, and then directly coated or potted on the surface of the chip. Part of the light emitted by the blue LED chip directly passes through the phosphor layer, and the rest generates yellow light by exciting the phosphor. After the two parts of light are mixed, they appear as white light under the vision of the human eye. The packaging structure of phosphor powder and LED chip is characterized by simple process and low manufacturing cost. However, due to the close contact between the phosphor powder and the chip, the LED chip is in a closed environment, and the heat generated when it emits light is difficult to dissipate in time, r...

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Problems solved by technology

But at the same time, there are also the following problems: (1) Since there is only one layer of phosphor film, the spectrum of LED lamps is relatively monotonous, that is, the spectral energy in the visible light range is concentrated in some wavelength regions, and there is no or only a small amount of spectral energy in other regions ; (2) Since there is only one layer of phosphor film, it is very difficult to adjust the optical parameters such as the color temperature of LED lamps

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