OIS-Gyroscope SPI Switching for Multi-Camera Stability
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Solution Overview
Problem
The existing SPI communication system fails when multiple OISs in a mobile phone camera attempt to access a single gyroscope simultaneously, leading to system exceptions.
Innovation Solution
A communication circuit and control method that utilize a control circuit to selectively connect one OIS to the gyroscope, preventing simultaneous access and establishing a communication connection, thereby avoiding collisions and ensuring normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple OISs access the gyroscope through one SPI interface at the same time, then the camera system can support multiple OIS cameras, but the SPI cannot work normally causing system exceptions
Solution Approach 1:
The patent implements dynamic switching of the SPI interface connection state. The control circuit selectively connects different OIS devices to the gyroscope through time-division multiplexing, where the connection state changes dynamically based on which OIS device needs to access the gyroscope at a given moment. This resolves the contradiction by allowing multiple OIS devices to share the single SPI interface without simultaneous conflicts.
2Reliability
If one gyroscope serves only one OIS at a time through SPI protocol, then the SPI communication works normally, but multiple OIS cameras cannot be supported
Solution Approach 1:
The patent makes the single gyroscope serve multiple OIS devices by implementing time-division multiplexing access. The gyroscope becomes a universal resource that can be shared by multiple OIS cameras through the control circuit's selective connection capability. This allows one gyroscope to fulfill the function of multiple gyroscopes, supporting multiple OIS cameras while maintaining stable SPI communication.
3Quantity of substance
If multiple OISs share one gyroscope through time-division multiplexing, then system costs are reduced, but control complexity increases
Solution Approach 1:
The patent introduces a control circuit as an intermediary between the OIS devices and the gyroscope. This intermediary manages the time-division multiplexing access, handling the switching and coordination logic. By placing the control complexity in the intermediary control circuit rather than distributing it across multiple gyroscopes, the system reduces component quantity while concentrating control functionality in a dedicated management unit.
Data Source
AI summary
This application discloses a communication circuit, a control method, and an electronic device. The circuit includes a plurality of optical image stabilizers OIS, a gyroscope, and a control circuit, where an input terminal of the control circuit is connected to a power terminal, an output terminal of the control circuit is connected to the plurality of OISs separately, and the plurality of OISs are all connected to the gyroscope; and the control circuit controls one of the plurality of OISs to conductively connect to the gyroscope and establish a communication connection.