Patent Document ID: 9731130
Application ID: 14948235
Patent Flag: 1

Claim One:
1. An implant apparatus comprising: a plurality of photo sensors to receive light; a plurality of micro electrodes to stimulate neuron cells for enabling perception of a vision of the light captured by the photo sensors; a plurality of guard rings, each micro electrode surrounded by one of the guard rings to provide local return paths to confine electric flows from the electrode to targeted neuron cells, wherein the guard ring serves as a local return electrode corresponding to the micro electrode to prevent the electric flows from being toward undesired target directions; and circuitry coupled to the photo sensors and the micro electrodes, the circuitry to drive the micro electrodes for the stimulation of the neuron cells, wherein the apparatus is implemented in an integrated semiconductor device with a bendable flexibility to conform to a shape of a human eyeball and allow the micro electrodes in close proximity to the neuron cells for the stimulation.