Publication

CMOS image sensors for subretinal implant system

Mihai Adrian Ionescu, Philippe Renaud
2003
Conference Papers

Abstract

Visual capabilities recovery for some kind of illness is possible through subretinal implantable device stimulation. Two possible approaches for retinal pixel are proposed, fabricated in 0.35mum CMOS, tested and compared including electronic response on a human tissue like interface. In these solutions, power consumption has been proved to be dominated by electrode stimulation and, in normal condition, typical consumption is below 1 mW. The proposed pixel architectures, with 120 mum (LICOS) and 100 mum (WATCH) inter-pixel step, provide the smallest, standalone, highly integrated, subretinal implantable chip ever reported.

Official source

https://infoscience.epfl.ch/entities/publication/c8e52c58-9768-48da-9902-6ac8c0dc7285

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Mihai Adrian Ionescu, Philippe Renaud
2003
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/c8e52c58-9768-48da-9902-6ac8c0dc7285

About this result

Related concepts (23)

Active-pixel sensor

An active-pixel sensor (APS) is an , which was invented by Peter J.W. Noble in 1968, where each pixel sensor unit cell has a photodetector (typically a pinned photodiode) and one or more active transistors. In a metal–oxide–semiconductor (MOS) active-pixel sensor, MOS field-effect transistors (MOSFETs) are used as amplifiers. There are different types of APS, including the early NMOS APS and the now much more common complementary MOS (CMOS) APS, also known as the CMOS sensor.

Retina

The retina (from rete "net"; : retinae or retinas) is the innermost, light-sensitive layer of tissue of the eye of most vertebrates and some molluscs. The optics of the eye create a focused two-dimensional image of the visual world on the retina, which then processes that image within the retina and sends nerve impulses along the optic nerve to the visual cortex to create visual perception. The retina serves a function which is in many ways analogous to that of the film or in a camera.

Image sensor

An image sensor or imager is a sensor that detects and conveys information used to form an . It does so by converting the variable attenuation of light waves (as they pass through or reflect off objects) into signals, small bursts of current that convey the information. The waves can be light or other electromagnetic radiation. Image sensors are used in electronic imaging devices of both analog and digital types, which include digital cameras, camera modules, camera phones, optical mouse devices, medical imaging equipment, night vision equipment such as thermal imaging devices, radar, sonar, and others.