Patent ID: 9572222
Date: 2017-02-14
CPC Classifications: H01L,H05B

Claim:
1. A lighting device comprising: a first light emitting diode (LED), the first LED being formed as a first die emitting a first primary color; a first control circuit formed in the first die, the first control circuit being connected to the first LED for controlling a voltage across the first LED or a current through the first LED; a second LED, the second LED being formed as a second die emitting a second primary color; a second control circuit formed in the second die, the second control circuit being connected to the second LED for controlling a voltage across the second LED or a current through the second LED; a third LED, the third LED being formed as a third die emitting a third primary color; a third control circuit formed in the third die, the third control circuit being connected to the third LED for controlling a voltage across the third LED or a current through the third LED; the first die, the second die, and the third die having respective first terminals connected together and to a first power terminal; the first die, the second die, and the third die having respective second terminals connected together and to a second power terminal, such that the first die, the second die, and the third die are connected in parallel, wherein the first LED, the second LED, and the third LED form a first set of LEDs in an array of substantially identical sets of LEDs to form an addressable panel of LEDs, the panel having address buses for energizing the LEDs in each of the sets; and a time division multiplexing circuit coupled to the address busses to apply separate control currents to control terminals of the first control circuit, the second control circuit, and the third control circuit at different times in a single cycle, wherein the time division multiplexing circuit controls the first control circuit, the second control circuit, and the third control circuit to apply a respective voltage or current to the first LED, the second LED, and the third LED to achieve a desired perceived color for each single cycle.