Motion Picture Camera Control Device Tail Slate Recording
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Solution Overview
Problem
In cinematographic productions, there is a risk of accidentally terminating motion picture recordings prematurely, especially when using a tail slate, which can lead to the tail slate not being recorded within the same motion picture sequence, causing difficulties in post-processing.
Innovation Solution
A control device for a motion picture camera with a record button and a control circuit that distinguishes between normal recording mode and tail slate mode, requiring a third actuation of the record button to terminate the recording in tail slate mode, ensuring the tail slate is recorded within the same motion picture sequence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the record button is used in toggle mode to start and terminate motion picture recording, then the operation is simple and quick, but the risk of accidental termination increases and the tail slate may not be recorded
Solution Approach 1:
The control device dynamically changes the termination condition based on the operating mode. In normal recording mode, a second actuation terminates recording as before. In tail slate mode, the system requires a third actuation to terminate, preventing accidental termination while maintaining ease of operation through the same record button interface
Solution Approach 2:
The system changes the parameter of actuation count required for termination. Normally 2 actuations are needed (start and stop), but in tail slate mode the system requires 3 actuations, adding an extra confirmation step that prevents accidental termination while preserving the simple toggle interface
2Productivity
If the recording is terminated after capturing the motion picture sequence, then the recording process is complete, but the tail slate is not recorded and must be manually assigned later
Solution Approach 1:
The system performs a preliminary action by setting the tail slate mode before recording the motion picture sequence. This preliminary configuration ensures that the recording will automatically continue to capture the tail slate afterward, preventing information loss and eliminating the need for manual assignment during post-production
3Reliability
If the camera remains activated to record the tail slate, then the tail slate can be captured, but the risk of accidental termination before the tail slate is recorded increases
Solution Approach 1:
The system applies preliminary anti-action by implementing a protective mechanism that counteracts the risk of accidental termination. The third-actuation requirement creates a deliberate action barrier that prevents unintentional early termination, ensuring the tail slate is captured while managing the extended recording time through clear mode indication
Data Source
AI summary
In a control device for a motion picture camera that has a record button and a control circuit connected to the record button, the control circuit is configured to cause a start of a motion picture recording in response to a first actuation of the record button. In a normal recording mode, the control device causes a termination of the motion picture recording in response to a second actuation of the record button. In a tail slate mode, the control device, in contrast, only causes a termination of the motion picture recording when first a second actuation of the record button takes place and then a third actuation of the record button takes place.