Press-Duration Image Capture Control for Photo and Video
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Solution Overview
Problem
Camera-enabled electronic devices, particularly wearable devices like electronics-enabled eyewear, face challenges with limited space and capacity for intuitive image capture control, exacerbated by the need for image-capture components to boot up before capturing and processing image data.
Innovation Solution
A press-and-hold input mechanism distinguishes between photo and video capture based on the duration of the press, with a predefined threshold, allowing dormant image-capture components to boot up during the press, minimizing lag between button release and photo capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single common input mechanism is used for photo and video capture, then device complexity is reduced, but intuitive user selection between photo and video capture becomes difficult
Solution Approach 1:
The patent applies parameter changes by using the duration of the button press as a distinguishing parameter. Short presses (below threshold) trigger video capture while long presses (above threshold) trigger photo capture. This resolves the contradiction by maintaining a single input mechanism while making the function selection intuitive through clearly differentiated press durations.
2Use of energy by moving object
If image-capture components are kept in dormant state to save energy, then battery performance is improved, but lag occurs between button release and photo capture
Solution Approach 1:
The patent applies preliminary action by requiring the user to hold the button pressed for a threshold duration before photo capture is triggered. This allows the image-capture components (camera, image processor) to boot up and be ready during the press-and-hold period, so that when the button is released, the components are already active and photo capture occurs immediately without lag. This resolves the contradiction by using the press duration to pre-initialize the system.
3Speed
If image-capture components are always active to eliminate lag, then response time is improved, but battery performance deteriorates
Solution Approach 1:
The patent applies dynamics by making the image-capture components dynamic rather than static - they transition from dormant to active state based on user input. The components remain dormant during normal operation to conserve battery, but become active when a press-and-hold input is detected. This dynamic state management resolves the contradiction by achieving fast response time only when needed, rather than maintaining constant readiness.
Data Source
AI summary
In a camera-enabled electronic device, photo capture is triggered by a press-and-hold input only if the holding duration of the press-and-hold input is greater than a predefined threshold duration. A press-and-hold input shorter in duration than the threshold triggers video capture. Thus, a short press triggers video capture, while a long press triggers photo capture.