An LED circuit ( 40 ) comprises integrated circuit LEDs ( 50 ) each mounted over a respective LED control circuit ( 42 ). The LED control circuits ( 42 ) are electrically connected together to by the integrated circuit to define a string of LED control circuits, each having at least one control line ( 44 ) leading to the circuit. This provides a compact circuit of multiple LEDs with individual control of the LEDs.
1. An LED circuit, comprising:
a plurality of integrated circuit LED packages; and
an integrated circuit comprising a plurality of LED control circuits, each of the plurality of LED control circuits being formed in a respective area of the integrated circuit, and having at least one control line leading to each individual LED control circuit,
wherein each LED package is bonded over a respective LED control circuit such that the LED makes electrical connection with the LED control circuit, and the LED control circuits are electrically connected together in series by the integrated circuit to define a string of LED control circuits,
wherein each LED control circuit comprises a transistor in parallel with the LED package, and the at least one control line comprises a transistor gate line and wherein the ends of the string of LED control circuits comprise power line connection pads,
wherein the string is arranged along a straight line, and wherein the control lines extend to one side from each LED control circuit and then extend along the direction of the string to one or other end of the string of control circuits.
2. A circuit as claimed in claim 1 , wherein each LED package comprises two terminals, which are connected to the transistor source and drain.
3. An LED circuit, comprising:
a plurality of integrated circuit LED packages; and
an integrated circuit comprising a plurality of LED control circuits, each of the plurality of LED control circuits being formed in a respective area of the integrated circuit, and having at least one control line leading to each individual LED control circuit,
wherein each LED package is bonded over a respective LED control circuit such that the LED makes electrical connection with the LED control circuit, and the LED control circuits are electrically connected together in series by the integrated circuit to define a string of LED control circuits,
wherein each LED control circuit comprises a transistor in parallel with the LED package, and the at least one control line comprises a transistor gate line and wherein the ends of the string of LED control circuits comprise power line connection pads,
wherein the string is arranged along a straight line,
wherein the control lines extend to one side from each LED control circuit and then extend along the direction of the string to one or other end of the string of control circuits, and
wherein half of the control lines extends to one end of the string of control circuits and the other half of the control lines extends to the other end of the string of control circuits.
4. An LED circuit arrangement, comprising a plurality of LED circuits, each LED circuit comprising:
a plurality of integrated circuit LED packages; and
an integrated circuit, the integrated circuit comprising a set of LED control circuits, each LED control circuit being formed in a respective area of the integrated circuit, and having at least one control line leading to each individual LED control circuit,
wherein each LED package is bonded over a respective LED control circuit such that the LED makes electrical connection with the LED control circuit, and the LED control circuits are electrically connected together in series by the integrated circuit to define a string of LED control circuits,
wherein each LED control circuit comprises a transistor in parallel with the LED package, and the at least one control line comprises a transistor gate line and wherein the ends of the string of LED control circuits comprise power line connection pads,
wherein the string is arranged along a straight line, and wherein the control lines extend to one side from each LED control circuit and then extend along the direction of the string to one or other end of the string of control circuits,
wherein the power line connection pads of the different LED circuits are connected together to form a series connection of the strings of LED control circuits with a power line connection pad at each end.
5. The LED circuit arrangement as claimed in claim 4 , wherein the LED circuits are arranged side by side.