Event-Based Sensor Pixel Array With Handshake-Free Coordinate Detection
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Solution Overview
Problem
Conventional event-based sensor systems utilize acknowledgement or handshake protocols to identify spatial coordinates of detected events, which introduce latency and hinder efficient event processing.
Innovation Solution
An array of sensor elements with column-specific and row-specific event trigger lines and detector circuits, utilizing open loop arbitration to directly apply pixel-specific event trigger signals, enabling efficient identification of event coordinates without handshake protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If acknowledgement or handshake protocols are used to identify spatial coordinates of detected events, then the system can accurately identify event locations, but latency increases and event processing efficiency deteriorates
Solution Approach 1:
The patent extracts and removes the acknowledgement or handshake protocol from the event processing system. By eliminating this protocol, the system achieves direct identification of event spatial coordinates without the latency introduced by handshake mechanisms, while maintaining accuracy through alternative direct addressing methods
Solution Approach 2:
The system performs preliminary organization of sensor elements into arrays with assigned spatial coordinates before event detection. This pre-configuration allows direct mapping of detected events to their spatial locations without requiring post-detection handshake protocols to establish coordinate information
2Measurement precision
If conventional DVS circuits are used, then the system can detect events with high temporal resolution, but event processing speed is limited by protocol overhead
Solution Approach 1:
The patent removes the protocol overhead (acknowledgement or handshake mechanisms) from the event processing pipeline. This extraction eliminates the bottleneck that limited event processing speed, allowing the system to fully utilize the high temporal resolution capabilities of the DVS circuits without protocol-induced delays
Solution Approach 2:
The system skips the traditional handshake protocol steps entirely, rushing directly from event detection to coordinate identification and processing. This skipping of intermediate protocol steps enables the system to maintain high temporal resolution while achieving significantly faster event processing speeds
Data Source
AI summary
Event-based sensor systems and method for operating event-based sensor systems are disclosed. A sensor system includes an array of sensor elements arranged in columns and rows, wherein each sensor element in the array of sensor elements includes, a detector circuit, an active pixel sensor (APS) circuit, and a dynamic vision sensor (DVS) circuit, the DVS circuit including an event trigger switch configured to control application of a signal on an event trigger line in response to a pixel-specific event trigger signal.