Stmicroelectronics (grenoble 2) Sas

Stmicroelectronics (research & Development) Limited

Stmicroelectronics (alps) Sas

Stmicroelectronics Gmbh

Jean-Jacques Rouger

Pascal Mellot

Jeffrey M Raynor

Sophie Taupin

Salim Bouchene

Cedric Grospellier

Mickael Guene

Jeff M Raynor

An optical sensor includes pixels. Each pixel has a photodetector. A readout circuit performs a process over an exposure time where the photodetector is connected to a reverse bias voltage supply to reset a voltage across the photodetector, and the photodetector is disconnected from the reverse bias voltage supply until that the voltage across the photodetector decreases in response to received ambient light. An ambient light level is then determine an based on a number of times the voltage across the photodetector is reset over the exposure time.

Optical sensor and apparatus comprising an optical sensor

The present disclosure relates to a device and method for measuring a flicker frequency of a light source configured to implement at least one phase lock loop.

Device and method for measuring of a flickering frequency

Optical sensor and apparatus comprising an optical sensor having a readout circuit to determine an ambient light level based on voltage across a photodetector at the end of an exposure time

An optical sensor includes pixels. Each pixel has a photodetector and a semiconductor guard ring around the photodetector. The photodetector and the semiconductor guard ring are dimensioned so that a fill factor of the pixel is less than or equal to 50%.

Optical sensor and apparatus comprising an optical sensor having a photodetector and a semiconductor guard ring are dimensioned so that a fill factor of each pixel is less than or equal to 50%

A method of detecting ambient luminous radiation includes resetting and triggering a counter each time a photodiode illuminated by the ambient luminous radiation reaches a discharge threshold. The counter is then being clocked by a clock signal having a first frequency and delivering a counter output signal. The method further includes generating an AC signal representative of the ambient luminous radiation by converting, from digital to analog, a digital signal obtained from the counter output signal.

Method of ambient luminosity level detection, and corresponding sensor

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Saint Pierre de Mesage, France

Jean-Jacques Rouger