LED Having a Cup-in-Cup Structure for Achieving Dual Color Temperature

Abstract

A light emitting diode (LED) having a cup-in-cup structure for achieving dual color temperature includes: a first bowl-shaped platform, with a second bowl-shaped platform embedded in the bottom of the first bowl-shaped platform; a first LED packaged in the second bowl-shaped platform, and a second LED packaged in the first bowl-shaped platform; the first LED and the second LED are covered with phosphor, forming a first color temperature LED and a second color temperature LED, respectively. The structure can simplify the packaging bracket structure, avoid mutual contamination between two phosphor dispensing steps, and yield a highly consistent dual color temperature LED. By having an LED driver receive a control signal loaded on the anode or/and the cathode of the LED, and controlling the duty cycle of the first color temperature LED and the second color temperature LED according to the control signal, white light with multiple color temperatures is achieved.

Dependencies are inferred from the claim text.