LIGHT EMITTING DEVICE WITH BEVELED REFLECTOR AND MANUFACTURING METHOD OF THE SAME

摘要

A light emitting device, including an LED semiconductor die, a photoluminescent structure and a reflector, is disclosed. The photoluminescent structure with a beveled edge surface is disposed on top of the LED semiconductor die, wherein a lower surface of the photoluminescent structure adheres to an upper surface of the LED semiconductor die. A reflective resin material is disposed surrounding edge surfaces of the LED semiconductor die and the photoluminescent structure forming a beveled reflector. A method to manufacture the above light emitting device is also disclosed. Advantages of this light emitting device with beveled reflector include increasing the light extraction efficiency, making the viewing angle tunable, improving spatial color uniformity and reducing the light source etendue realized in a compact form-factor size.

主权项

1. A light emitting device comprising:
a light emitting diode (LED) semiconductor die comprising an upper surface, a lower surface opposite to the upper surface, an edge surface, and a set of electrodes, wherein the edge surface of the LED semiconductor die extends between the upper surface of the LED semiconductor die and the lower surface of the LED semiconductor die, and the set of electrodes is disposed on the lower surface of the LED semiconductor die; a photoluminescent structure disposed on the LED semiconductor die, comprising an upper surface, a lower surface opposite to the upper surface, and an edge surface extending between the upper surface of the photoluminescent structure and the lower surface of the photoluminescent structure, wherein the upper surface of the photoluminescent structure is larger than the lower surface of the photoluminescent structure, such that the edge surface of the photoluminescent structure is a beveled edge surface, and the lower surface of the photoluminescent structure is adjacent to the upper surface of the LED semiconductor die; and a reflector, covering the edge surface of the LED semiconductor die and the beveled edge surface of the photoluminescent structure.