Lumiode, Inc.

Hamilton Sundstrand Space Systems International, Inc.

Brian Tull

Mark R Jaworowski

Ioannis Kymissis

John W Steele

Durwood Mace Beringer

Vincent Lee

Jerome D Varsik

Yu-Jen Hsu

Jesse Morenz

Addressing an emissive display having pixels arranged into rows and columns. A first clock signal is received at an address select input of a first row of the display. Data signals are received at data signal inputs of the first row of the display, each of the received data signals corresponding to a column of the display. When the first clock signal is active at the address select input, the data signals are output to corresponding drivers of light emitting semi-conductors of the first row and via corresponding data signal outputs of the first row. The data signals are received from the data signal outputs of the first row at a first row of shift registers. A second clock signal is received at the first row of shift registers. When the second clock signal is active, the data signals are output from the first row of shift registers.

Addressing for emissive displays

LED structures (e.g., LED arrays) and fabrication methods can reduce or even eliminate deep etching, and associated defect formation, proximate sites of individual LEDs. Such approaches can achieve desired electrical isolation without deep etching, provide a high conductivity current spreading layer, and, or reduce losses otherwise associated with conventional fabrication approaches. Some implementations advantageously lift off or separate an insulating substrate from a wafer to expose a bottom surface of the epitaxial LED layer and forms a backside contact (e.g., ground plane) overlying the bottom surface. Other implementations isolate deep etching away from sensitive regions and locate the backside contact on a top surface of the epitaxial LED layer. Some implementations form light extraction features (e.g., photonic crystals) on the exposed bottom surface. The top surface of the epitaxial LED layer may be undoped to improve electrical isolation. The bottom surface of may be shallow etched to improve light extraction.

LED display structures and fabrication of same

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New York, NY, United States of America

Brian Tull