Camera Lens Communication Terminal Voltage Switching
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Solution Overview
Problem
Existing image-pickup systems face high power consumption and radiation noise due to increased charges/discharges in communication terminals, especially when setting high communication speeds between cameras and interchangeable lenses.
Innovation Solution
A camera and lens unit system that switches between two communication modes, adjusting the voltage applied to communication terminals to reduce power consumption while increasing communication speed, using a first communication mode with a higher voltage for initial data transfer and a second mode with a lower voltage for higher-speed, asynchronous communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high communication speed is set using existing methods (JP 8-129199 or JP 7-203116), then communication speed is improved, but power consumption and radiation noise increase due to increased charges/discharges in communication terminals
Solution Approach 1:
The patent applies parameter changes by switching between two communication modes with different voltage levels. The camera controller selects the first communication mode (higher voltage) when communication speed is not critical, and the second communication mode (lower voltage) when high communication speed is required. This dynamic parameter adjustment resolves the contradiction by allowing high speed only when necessary, thereby reducing overall power consumption while maintaining the capability for high-speed communication when needed.
2Speed
If high communication speed is set using existing methods, then communication speed is improved, but radiation noise increases due to increased charges/discharges in communication terminals
Solution Approach 1:
The patent resolves this contradiction by dynamically changing the voltage parameter based on communication requirements. When high communication speed is needed, the system switches to the second communication mode with lower voltage, which reduces the number of charges/discharges in communication terminals and thereby reduces radiation noise. This selective parameter adjustment allows the system to achieve high speed communication only when necessary, minimizing radiation noise during normal operation.
3Reliability
If first communication mode with higher voltage is used, then communication reliability is improved, but communication speed decreases
Solution Approach 1:
The patent applies dynamics by making the communication mode adjustable rather than fixed. The camera controller dynamically selects between the first communication mode (higher voltage, higher reliability, lower speed) and the second communication mode (lower voltage, lower reliability, higher speed) based on the specific communication requirements. This dynamic selection allows the system to optimize for reliability when needed and for speed when needed, resolving the contradiction between these two opposing requirements.
Data Source
AI summary
A camera communication unit is configured to change a voltage applied to a communication terminal used for a communication with the lens unit. The camera communication unit is configured to communicate with the lens unit using one of a first communication mode and a second communication mode, the first communication mode setting the voltage applied to the communication terminal to a first range and enabling the communication with the lens unit using a communication method of a first communication speed, and the second communication mode setting the voltage applied to the communication terminal to a second range that is located on a lower voltage side than the first range and enabling the communication with the lens unit using a communication method of a second communication speed higher than the first communication speed.