Camera Body Silent Speed Control for Lens Drive Noise
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Solution Overview
Problem
Conventional imaging apparatuses face challenges in minimizing drive sound noise when recording audio, as the drive units for interchangeable lenses, such as diaphragm or zoom lenses, generate noise during operation, affecting the quality of both still and moving images.
Innovation Solution
A camera body and interchangeable lens system that includes a receiving unit for silent speed information, allowing the camera body to generate control signals for the drive unit to operate at a low sound level, specifically within a predetermined range, thereby reducing noise during audio recording or silent mode operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the drive unit operates at high speed to improve response, then productivity is improved, but drive sound level increases causing noise pollution
Solution Approach 1:
The drive unit's operating speed is made dynamic rather than fixed. The control unit adjusts the drive speed based on the operational context: using high speed when rapid response is needed and low speed when audio recording is active, thereby resolving the contradiction between productivity and noise generation
Solution Approach 2:
The operating parameters of the drive unit are changed based on different operational modes. The system transitions between different speed parameters (high speed for normal operation, low speed for silent operation during audio recording) to balance productivity and noise reduction
2Object-generated harmful factors
If the drive unit operates at low speed to reduce noise, then harmful factors are reduced, but response speed decreases affecting productivity
Solution Approach 1:
The system dynamically adjusts the drive unit speed based on real-time operational conditions. During audio recording, the speed is reduced to minimize noise, while during normal operation or when rapid response is required, the speed is increased to maintain productivity
Solution Approach 2:
The control unit changes the operational parameters of the drive unit according to different modes. When audio recording is detected, the system switches to low-speed parameter settings to reduce noise, and switches to high-speed parameters when rapid response is needed, thus resolving the trade-off between noise reduction and productivity
Data Source
AI summary
There are provided a camera body capable of operating a drive unit of an interchangeable lens at a low drive sound level, an interchangeable lens, and an imaging apparatus including such a camera body and an interchangeable lens. The camera body to which an interchangeable lens is mountable, the interchangeable lens including an optical member operable to change an optical condition and a drive unit operable to drive the optical member at a drive speed within a predetermined range, the camera body have: a receiving unit operable to receive silent speed information from the interchangeable lens, the silent speed information indicating a setting value related to a silent operation of the drive unit, the setting value being a value of a drive speed within the predetermined range; and a control unit operable to generate a control signal for driving the drive unit based on the received silent speed information, when attempting to drive the drive unit of the interchangeable lens with a suppressed drive sound of the interchangeable lens, and send the generated control signal to the interchangeable lens.