Abstract: According to one embodiment a visual prosthesis is provided that includes an integrated circuit having a plurality of pixels and an array of electrodes connected to the pixels and configured to excite neurons in a retina. The prosthesis also includes one or more photovoltaic cells and a photodetector. The integrated circuit is configured to process signals from the photodetector to selectively activate the pixels. The present disclosure further relates to artificial vision systems including such prostheses and methods for inserting the prostheses.

Abstract: A method for photon counting for pixels in a pixelated detector is disclosed, wherein for each of the pixels, one or more neighbouring pixels are defined. The method comprises receiving a charge in one or more of the pixels and comparing for each of the pixels the charge with a trigger threshold. If the charge in a pixel is above the trigger threshold, the charge is registered in the pixel after a registration delay, wherein the registration delay is dependent on the level of the charge received in the pixel in such a way that a registration delay decreases with increasing charge. A counter for a pixel is incremented when the charge is registered and an increment of a counter of the neighbouring pixels is inhibited. Pixelated semiconductor detectors are also disclosed.

Abstract: A method for photon counting for pixels in a pixelated detector is disclosed, wherein for each of the pixels, one or more neighbouring pixels are defined. The method comprises receiving a charge in one or more of the pixels and comparing for each of the pixels the charge with a trigger threshold. If the charge in a pixel is above the trigger threshold, the charge is registered in the pixel after a registration delay, wherein the registration delay is dependent on the level of the charge received in the pixel in such a way that a registration delay decreases with increasing charge. A counter for a pixel is incremented when the charge is registered and an increment of a counter of the neighbouring pixels is inhibited. Pixelated semiconductor detectors are also disclosed.