Quantum dot-based white LED device and manufacturing method thereof

A technology of LED devices and manufacturing methods, applied in semiconductor devices, electrical components, circuits, etc., can solve the problems of secondary absorption of light emission, insufficient color rendering of white light LEDs, etc., achieve high color rendering index, improve luminous efficiency, and color gamut broad effect
CN104733593AActive Publication Date: 2015-06-24APT ELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
APT ELECTRONICS
Publication Date
2015-06-24

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Abstract

The invention discloses a quantum dot-based white LED device and a manufacturing method thereof. The quantum dot-based white LED device comprises an LED chip, a light conversion layer coating the LED chip and a carrier carrying the LED chip, wherein the LED chip is reversely arranged in the carrier; the LED chip comprises a substrate; multiple graphic windows are arranged on the substrate; light-emitting material is arranged in the light conversion layer; the light-emitting material comprises quantum dots with different light emitting colors and transparent polymer material; and the quantum dots with different light emitting colors are mutually independently arranged and are arranged in the graphic windows in a covering mode. the quantum dots with different light emitting colors are adopted for light emitting conversion to realize the white LED device, a wider color gamut, a higher color rendering index and a wider spectral emission range can be realized, wide application of the LED device is facilitated, and in addition, as the quantum dots with different light emitting colors are coated regionally, re-absorption between the quantum dots with different light emitting colors can be avoided, and the light-emitting efficiency of the LED device can be improved.
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Description

technical field

[0001] The invention relates to a semiconductor lighting device, in particular to a white light LED device and a manufacturing method thereof. Background technique

[0002] Light-emitting diode (LED) is an electroluminescent device processed by semiconductor manufacturing technology. The main principle of light emission is that the compound semiconductor material is loaded with a forward voltage, and the active electrons and holes recombine to generate photons. Eye recognition produces visible light. At present, because the brightness problem of LEDs has been greatly improved, LEDs are widely used in various fields, including backlight units, automobiles, electric signals, traffic lights, lighting devices, and the like.

[0003] The mainstream commercial white LEDs currently on the market are realized by using blue LED chips plus one or more phosphors of yellow, green, and red. In the prior art, the phosphor powder must be evenly coated on the chip surface,...

Claims

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