Abstract: An event based pixel sensor system employing delay equalization between differently illuminated pixels.

Abstract: A solid-state imaging device includes pixel circuits, wherein each pixel circuit outputs pixel signals on a data signal line in response to an active row select signal in a row selection interval. Each pixel circuit includes a floating diffusion, wherein a floating diffusion potential of the floating diffusion determines a voltage level of the pixel signals. For each of the pixel circuits, a differencing circuit receives two pixel signals successively transmitted from the pixel circuit on the data signal line within a same row selection interval. The differencing circuit obtains a difference signal from the two pixel signals. The solid-state imaging device controls each pixel circuit to output a previous pixel signal and a new pixel signal in a same row selection interval, wherein the previous pixel signal and the new pixel signal contain image information about an imaged scene at different points in time.

Abstract: An image sensor includes a plurality of pixel clusters, wherein each pixel cluster includes a number L of pixel circuits. Each pixel circuit outputs pixel event information, wherein the pixel event information indicates whether or not a change of radiation intensity received by the pixel circuit exceeds a positive threshold value and/or whether or not the change of radiation intensity received by the pixel circuit falls below a negative threshold value. An event processing circuit receives pixel information based on the pixel event information of the pixel circuits of a pixel cluster and generates cluster event information indicating whether or not the pixel information of the L pixel circuits fulfills a predefined cluster output condition.

Abstract: An image sensor includes a plurality of pixel circuits for event detection, wherein each pixel circuit includes at least one output transistor and at least one selection transistor electrically connected in series between at least one pixel output and a first supply potential. A column signal line electrically connects the pixel outputs of the plurality of pixel circuits. A comparator/latch circuit is configured to receive a signal derived from a pixel event signal transmitted on the column signal line at a first comparator input, and to output a latched active column event signal, when the signal at the first comparator input exceeds or falls below a threshold voltage applied to a second comparator input of the comparator/latch circuit.

Abstract: A sensor device includes multiple pixels for receiving light and converting it into photocurrents, which are then transformed into photovoltages by corresponding current-voltage converters. Each photovoltage is stored in a capacitor linked to its converter. The device features event detection units that identify changes in light intensity based on these photovoltages, determining if they exceed a set threshold. The device's circuitry enables two operation modes: one where an event detection unit receives the photovoltage from a single pixel, and another where it receives a combined photovoltage from multiple pixels.

Abstract: A sensor device comprises a plurality of sensor units each of which being capable to detect an intensity of an influence on the sensor unit, and to detect as an event a positive or negative change of the intensity of the influence that is larger than a respective predetermined threshold, a filter unit configured to randomly select for readout a part of the events that were detected by the plurality of sensor units during at least one predetermined time period, a memory unit configured to store history data of detected events and/or of readout selection operations of the filter unit, and an output interface configured to receive and output the selected part of the events from the filter unit for each of the at least one predetermined time periods.

Abstract: A dynamic vision sensor (DVS) or change detection sensor reacts to changes in light intensity and in this way monitors how a scene changes. This disclosure covers both single pixel and array architectures. The DVS may contain one pixel or 2-dimensional or 1-dimensional array of pixels. The change of intensities registered by pixels are compared, and pixel addresses where the change is positive or negative are recorded and processed. Analyzing frames based on just three values for pixels, increase, decrease or unchanged, the proposed DVS can process visual information much faster than traditional computer vision systems, which correlate multi-bit color or gray level pixel values between successive frames.

Abstract: In dynamic vision sensor (DVS) or change detection sensors, the chip or sensor is configured to control or modulate the event rate. For example, this control can be used to keep the event rate close to a desired rate or within desired bounds. Adapting the configuration of the sensor to the scene by changing the ON-event and/or the OFF-event thresholds, allows having necessary amount of data, but not much more than necessary, such that the overall system gets as much information about its state as possible.

Abstract: An NMOS-only operational transconductance amplifier (OTA) replaces the PMOS transistors with switched capacitor pseudo-resistors in the pixels of an optical sensor such as a dynamic vision sensor or event-based vision sensor. Thus, if a stacked CMOS image sensor (CIS) process is employed, then the upper wafer can be kept free from N-wells, while still having the complete OTA on the upper wafer. Thus, it is possible to have only one wafer-to-wafer connection per pixel. Moreover, by operating the switched capacitor pseudo-resistors as three terminal devices, the gain can further be increased.

Abstract: A dynamic vision sensor (DVS) or change detection sensor reacts to changes in light intensity and in this way monitors how a scene changes. This disclosure covers both single pixel and array architectures. The DVS may contain one pixel or 2-dimensional or 1-dimensional array of pixels. The change of intensities registered by pixels are compared, and pixel addresses where the change is positive or negative are recorded and processed. Analyzing frames based on just three values for pixels, increase, decrease or unchanged, the proposed DVS can process visual information much faster than traditional computer vision systems, which correlate multi-bit color or gray level pixel values between successive frames.

Abstract: An event-based vision sensor system comprises an event-based pixel array including pixels that detect light, a readout circuit for reading out events associated with light received by each pixel and with the position it occupies in the array, and a memory controller that enables writing of each event, or event-related data, associated with a certain pixel to a certain address in a memory.

Abstract: In dynamic vision sensor (DVS) or change detection sensors, the chip or sensor is configured to control or modulate the event rate. For example, this control can be used to keep the event rate close to a desired rate or within desired bounds. Adapting the configuration of the sensor to the scene by changing the ON-event and/or the OFF-event thresholds, allows having necessary amount of data, but not much more than necessary, such that the overall system gets as much information about its state as possible.

Abstract: An event based pixel sensor system employing delay equalization between differently illuminated pixels.

Abstract: An event-based vision sensor system comprises an event-based pixel array including pixels that detect light, a readout circuit for reading out events associated with light received by each pixel and with the position it occupies in the array, and a memory controller that enables writing of each event, or event-related data, associated with a certain pixel to a certain address in a memory.

Abstract: A method and system for rendering an augmented reality scene on a mobile computing device tracks a real-world scene and/or a viewpoint of a user with one or more event-based vision sensors and blends an augmented reality scene displayed on the mobile computing device based on the viewpoint of the user and a scene map of the real-world scene and on the tracking of the one or more event-based vision sensors. Event-based vision sensors offer many advantages, mainly by intrinsically compressing the data stream and thus reducing the amount of data that a processing unit needs to perform. Furthermore, the event-based vision sensor pixels continuously sense the visual changes in the scene and report them with a very low latency. This makes the event-based vision sensor an ideal sensor for always-on tasks such as visual tracking and smart sensor control or data enhancement of secondary sensing modalities.

Abstract: A photoreceptor module (PR) includes a photoelectric conversion element (PD), a first amplifier circuit (110) and a second amplifier circuit (120). The first amplifier circuit (110) includes a first amplifier portion (112) and a first feedback portion (114), wherein an input of the first amplifier portion (112) and a cathode (C) of the photoelectric conversion element (PD) are electrically connected. The second amplifier circuit (120) includes a second amplifier portion (122) and a second feedback portion (124), wherein controlled path of the second feedback portion (124), a controlled path of the first feedback portion (114), and the photoelectric conversion element (PD) are electrically connected in series.

Abstract: An event based pixel sensor system employing delay equalization between differently illuminated pixels.

Abstract: A dynamic vision sensor such as an event based vision sensor employs analog to digital converters (ADC), such as ramp ADCs, that analog to digital converts the signals from photoreceptors. Only previous light values need to be stored in the pixels. This is accomplished by generating three ramps. In addition, log compression can be implemented by increasing the count linearly while increasing the reference voltage exponentially, or increasing the count logarithmically while increasing the reference voltage linearly.

Abstract: An event based pixel sensor system employs regions of interest or regions of non-interest, which are preferably dynamic, to isolate change events and reduce data from non-interesting events.

Abstract: A dynamic vision sensor such as an event based vision sensor employs analog to digital converters (ADC), such as ramp ADCs, that analog to digital converts the signals from photoreceptors. Current and previous light values are then stored and compared digitally. In addition, log compression can be implemented by increasing the count linearly while increasing the reference voltage exponentially, or increasing the count logarithmically while increasing the reference voltage linearly.