Imaging Apparatus Lens Driving Speed Control for HDMI Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In imaging apparatuses capable of outputting both images and sound to external devices, noise from lens driving is mixed with the sound output, causing interference.
Innovation Solution
The apparatus includes an optical system with a focus lens, zoom lens, and diaphragm, an imaging element, a microphone, an external output unit, and a controller that switches between a first imaging mode and a second mode where the optical system is driven at a higher speed, allowing the user to select the mode based on output capabilities to the external device, thereby reducing noise from lens driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the optical system is driven at higher speed (second imaging mode), then productivity is improved, but object-generated harmful factors worsen due to increased lens driving noise
Solution Approach 1:
The patent applies dynamics by making the optical system's driving speed adjustable between two modes: a first imaging mode with normal driving speed and a second imaging mode with higher driving speed. The controller dynamically switches between these modes based on whether external output is available, allowing the system to adapt its performance characteristics to the operational context.
Solution Approach 2:
The patent changes the driving speed parameter of the optical system between two distinct states: normal speed in the first imaging mode and higher speed in the second imaging mode. This parameter change enables the system to achieve higher productivity when needed while maintaining lower noise levels when external output is not available.
2Object-generated harmful factors
If the optical system is driven at normal speed (first imaging mode), then object-generated harmful factors are reduced, but productivity deteriorates
Solution Approach 1:
The system dynamically adjusts the optical system's driving speed based on the availability of external output. When external output is available, the system operates in the first imaging mode with normal driving speed to reduce noise. When external output is not available, it switches to the second imaging mode with higher driving speed to maintain productivity.
Solution Approach 2:
The driving speed parameter is changed between two states depending on operational conditions: normal speed is used when external output is available to minimize noise, while higher speed is used when external output is unavailable to maximize imaging productivity.
3Loss of information
If the apparatus outputs image and sound to external apparatus, then loss of information is reduced, but object-generated harmful factors worsen due to noise mixing with sound output
Solution Approach 1:
The controller detects in advance whether external output is available before initiating imaging. When external output is detected as available, the controller proactively switches to the first imaging mode with normal driving speed, preventing noise from being generated in the first place. This preliminary action ensures that sound quality is preserved from the outset when external output is being used.
Solution Approach 2:
The patent converts the potential harm of lens driving noise into a benefit by using the availability of external output as a trigger condition. When external output is available, the system deliberately operates at normal speed to minimize noise, turning the external output capability into a means of ensuring high sound quality.
Data Source
AI summary
A digital camera includes an optical system including a focus lens, a zoom lens and a diaphragm, an HDMI output terminal configured to output sound collected by a microphone unit and a picture imaged by a CCD image sensor to an external recorder, and a controller. The controller controls switching between a moving image priority mode and a still image priority mode in which the optical system is driven at a higher speed than a speed in a moving image priority mode. In addition, the controller allows change to a moving image imaging mode by an operation unit when detecting that output to the external recorder is possible in the HDMI output terminal.