Stmicroelectronics (research & Development) Limited

Stmicroelectronics Gmbh

Stmicroelectronics (grenoble 2) Sas

Stmicroelectronics R&d Limited

Université Paul Cézanne Aix-marseille III

Stmicroelectronics S.a.

Stmicroelectronics International N.v.

Stmicroelectronics (crolles 2) Sas

Zellweger Luwa Ag

Stmicroelectronics Sas (moroc)

Jeffrey M Raynor

Pascal Mellot

Patrick Baxter

Jean-Jacques Rouger

Filip Kaklin

Sophie Taupin

John Kevin Moore

Neale Dutton

Nicolas Moeneclaey

Arnaud Laflaquiere

Laurence Stark

Hervé Rigneault

Andrew Scott

Pierre-Francois Lenne

Renaud Vincentelli

Pierre Malinge

Colin Campbell

Jonathan Ephriam David Hurwitz

Peter B Denyer

Stewart Gresty Smith

Hans Wampfler

Andy Price

Frédéric Lalanne

Mathieu Reigneau

Alexandre Balmefrezol

Duncan Hall

Rolf Hensel

David Patrick Baxter

Hazel McInnes

Peter Markus Seitz

Benjamin Thomas Sarachi

Benjamin E Norman

Marek Jan Munko

Sergio Miguez Aparicio

Ilina Todorova

James M Hanratty

Abdelouahid Zakriti

Stephane Vivien

Michael Maurin

Mitchell O'Neal Perley

Michaël Maurin

Mitchel O'Neal Perley

A common centroid ambient light sensor includes a matrix of photodiodes having exactly a first row and a second row, at least three color channels, a readout circuit of the first color channel connected to exactly one photodiode in the first row and exactly one photodiode in the second row, and a readout circuit of the second color channel connected to exactly one photodiode in the first row and exactly one photodiode in the second row.

Ambient light sensor having common centroid layout

According to an embodiment, a method for capturing an image frame using a pixel array of an image sensor is provided. The method includes sequentially resetting each pixel row of the pixel array; sequentially reading out each pixel row of a first subset of pixel rows during a readout phase such that an integration time for each pixel of the first subset of pixel rows is equal to a fixed integration time; and globally resetting pixels of the pixel array in response to detecting that an ambient light level exceeds a threshold level, the globally resetting of the pixels occurring before a reading out of a second subset of pixel rows, each pixel row in the second subset of pixel rows having a variable integration time less than the fixed integration time and starting from the globally resetting of the pixels.

Asynchronous integration in rolling shutter image sensors

The present disclosure is directed to a fluidic ejection device configured to detect whether one or more nozzles of the fluidic ejection device is in a normal state, a blocked nozzle state, or an accumulated fluid state. The fluidic ejection device includes an optical blockage detector having a light emitting device configured to emit a light signal, and a light sensor configured to detect the light signal. The optical blockage detector detects the normal state, the blocked nozzle state, and the accumulated fluid state based on the detected light signal.

Fluidic ejection device with optical blockage detector

The present disclosure relates to a sensor having pixels, each pixel having photodiodes having each a terminal coupled to a first node associated with the photodiode; and an amplifier having a first part and, for each photodiode, a second part associated with the photodiode. The first part includes an output of the amplifier and a first MOS transistor of a differential pair. Each second part includes a second MOS transistor of the differential pair having its gate coupled to the first node associated with the photodiode the second part is associated with; a first switch coupling a source of the second transistor to the first part of the amplifier; and a second switch coupling a drain of the second transistor to the first part of the amplifier.

Light sensor

The present disclosure relates to a secondary device comprising a first port receiving a clock signal from a first port of a primary device and a second port connected to a second port of the primary device. The clock signal determines, for each bit transmission, first, second, third and fourth successive phases. The secondary device puts its second port in a high impedance state during the first, second and fourth phases of each bit transmission. During the third phase of each transmission of a bit of data from the secondary device to the primary device, the secondary device discharges its second port when the transmitted bit has a first value and leaves its second port in a high impedance state when the transmitted bit has a second value.

Serial bus system and method

An input stage circuit for a sigma-delta analog-to-digital converter circuit receives a digital-to-analog converter generated feedback signal and an analog current input signal to generate a difference signal applied to an integrator circuit. A single bit quantization circuit quantizes an output of the integrator circuit to generate a bit signal that is applied to an input of the digital-to-analog converter. The input stage circuit includes a switched input capacitor controlled by first and second, non-overlapping, clock signals.

Photodiode current compatible input stage for a sigma-delta analog-to-digital converter

An imaging sensor includes a pixel array containing photodiodes, the photodiodes being isolated from one another by full thickness deep trench isolations. Row control circuitry controls which rows of the pixel array operate in an imaging mode and which rows of the pixel array operate in an energy harvesting mode, on a row-by-row basis. Switch circuitry selectively connects different groups of photodiodes in rows operating in the energy harvesting mode into forward biased series configurations between a voltage output line and a ground line, or into forward biased parallel configurations between the voltage output line and the ground line. In the forward biased series configurations, the cathode of at least one photodiode of a given group of photodiodes is directly electrically connected to ground.

High voltage generation using reconfigurable photodiodes in pixel array

In an embodiment a method for measuring ambient light includes successively synchronizing optical signal acquisition phases with extinction phases of a disruptive light source, wherein the disruptive light source periodically provides illumination phases and the extinction phases, accumulating, in each acquisition phase, photo-generated charges by at least one photosensitive pixel comprising a pinned photodiode, wherein an area of the pinned photodiode is less than or equal to 1/10 of an area of the at least one photosensitive pixel, transferring, for each pixel, the accumulated photo-generated charges to a sensing node, converting, for each pixel, the transferred charges to a voltage at a voltage node and converting, for each pixel, the transferred charges to a digital number.

Method for measuring ambient light and corresponding integrated device

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

In certain embodiments, a method includes accessing image information for a scene in a movement path of a mobile robot. The image includes image information for each of a plurality of pixels of the scene, the image information comprising respective intensity values and respective distance values. The method includes analyzing the image information to determine whether to modify the movement path of the mobile robot. The method includes initiating, in response to determining according to the image information to modify the movement path of the mobile robot, sending of a command to a drive subsystem of the mobile robot to modify the movement path of the mobile robot.

Controlling movement of a mobile robot

An embodiment method of measuring ambient light comprises generating, by an ambient light sensor associated with a screen which alternates between first phases in which light is emitted and second phases in which no light is emitted by the screen, a first signal representative of an intensity of light received by the ambient light sensor during the first and second phases; comparing the first signal with a threshold intensity value; and controlling a timing of an ambient light measurement by the light sensor based on the comparison.

Method and device for ambient light measurement

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

A distance from an apparatus to at least one object is determined by generating a first signal and generating light modulated by the first signal to be emitted from the apparatus. Light reflected by the at least one object is detected using a Time-of-flight detector array, wherein each array element of the Time-of-flight detector array generates an output signal from a series of photon counts over a number of consecutive non-overlapping time periods. The output signals are compared to the first signal to determine at least one signal phase difference. From this at least one signal phase difference a distance from the apparatus to the at least one object is determined.

Higher pixel density histogram time of flight sensor with higher pixel density

An embodiment method of command of an electronic device comprises controlling a screen to alternate periodically between a first phase in which the screen emits light and a second phase in which no light is emitted by the screen, and precharging a charge pump of an ambient light sensor during the first phases, the ambient light sensor comprising at least a single photon avalanche diode powered by the charge pump.

Growing community of inventors

Edinburgh, United Kingdom

Jeffrey M Raynor