Integrated high-resolution untethered flexible neural implant

A system for monitoring and stimulating tissue in a subject, the system comprising:

• an array of microelectrodes electrically configured to couple to the tissue of the subject and configured to communicate electrical signals with the tissue;
• an addressable array of optically emissive pixels configured to communicate with the array of microelectrodes and to communicate light to the tissue;
• a microelectrode circuit electrically coupled to the array of microelectrodes and configured to receive electrical signals from individual microelectrodes in the array of microelectrodes;
• and
• a pixel circuit mapped to the array of optically emissive pixels to selectively illuminate individual optically emissive pixels in the array of optically emissive pixels, wherein the pixel circuit comprises a plurality of pixel subcircuits, each pixel subcircuit comprising a first transistor and a second transistor, the first transistor comprising a first transistor first terminal, a first transistor second terminal, and a first transistor gate terminal, the second transistor comprising a second transistor first terminal, a second transistor second terminal, and a second transistor gate terminal, the first transistor gate terminal coupled to a gate input, the first transistor first terminal coupled to a source input, the first transistor second terminal coupled to the second transistor gate terminal, the second transistor first terminal coupled to a voltage source, the second transistor second terminal coupled to one of the optically emissive pixels, wherein the source input is coupled to a second pixel subcircuit and the gate input is coupled to a third pixel subcircuit.