Patent ID: 9661716
Date: 2017-05-23
CPC Classifications: H01L,H05B

Claim:
1. A lighting device comprising: a first die containing a first transistor in series with a first light emitting diode (LED), wherein the first LED emits a primary first color, wherein the first die has first anode terminal, a first cathode terminal, and a first transistor control terminal; a second die containing a second transistor in series with a second LED, wherein the second LED emits a primary second color, wherein the second die has second anode terminal, a second cathode terminal, and a second transistor control terminal; a third die containing a third transistor in series with a third LED, wherein the third LED emits a primary third color, wherein the third die has third anode terminal, a third cathode terminal, and a third transistor control terminal; a first conductor connected to the first anode terminal, the second anode terminal, and the third anode terminal; a second conductor connected to the first cathode terminal, the second cathode terminal, and the third cathode terminal, such that the first die, the second die, and the third die are connected in parallel; a first control conductor connected to the first transistor control terminal for controlling a current through the first LED; a second control conductor connected to the second transistor control terminal for controlling a current through the second LED; a third control conductor connected to the third transistor control terminal for controlling a current through the third LED; and a control circuit for supplying a control signal to the first control conductor, the second control conductor, and the third control conductor for controlling respective brightnesses of the first LED, second LED, and third LED to achieve a desired combined color emission.