Smart driver for an array of LEDs

A smart driver in combination with an array of light emitting devices comprising:

• a plurality of light emitting devices arranged in an array of columns and rows of pixels, each pixel having an associated resistance and current requirement;
• a plurality of column drivers and a plurality of row drivers coupled to the columns and rows of pixels, respectively;
• a controllable power supply having a first power terminal coupled to each of the plurality of column drivers, a second power terminal coupled to each of the plurality of row drivers, and a control terminal connected to control power applied between the first and second power terminals in response to a control signal supplied to the control terminal, each pixel and the associated resistance forming an addressed circuit in conjunction with a unique combination of column driver and row driver coupled thereto;
• and
• a control circuit coupling each addressed circuit to the control terminal of the controllable power supply and supplying a unique control signal to the control terminal of the power supply for each addressed circuit whereby a unique amount of power is applied to each addressed circuit.

A method of supplying power to an array of light emitting devices comprising the steps:

• providing a plurality of light emitting devices arranged in an array of columns and rows of pixels, each pixel having an associated resistance and current requirement;
• providing a plurality of column drivers and a plurality of row drivers coupled to the columns and rows of pixels, respectively;
• selecting a specific pixel and the associated resistance and forming an addressed circuit in conjunction with a unique column driver and a unique row driver coupled to the selected pixel;
• providing a controllable power supply having a first power terminal coupled to the unique column driver, a second power terminal coupled to the unique row driver, and a control terminal connected to control power applied between the first and second power terminals in response to a control signal supplied to the control terminal;
• and
• controlling the controllable power supply to supply a unique control signal to the control terminal of the power supply whereby a unique amount of power is applied to the addressed circuit.