Touch Movement Control for Accurate Autofocus Positioning
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Solution Overview
Problem
Users face difficulties in precisely setting an autofocus position on a touch panel while looking through a viewfinder, leading to unintended position changes due to accidental touch movements outside the intended region.
Innovation Solution
An electronic device with a touch detection unit, selection unit, and control unit that detects touch operations and controls the autofocus based on predetermined regions, preventing unintended position changes by validating touch movements within specific boundaries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a user operates a touch panel on the back side monitor while looking into the viewfinder, then the user can change the AF position according to the touch position movement, but the user cannot precisely know which position on the touch panel they are touching, leading to unintended position changes
Solution Approach 1:
The system displays a visual indicator (frame or mark) on the back side monitor that shows the current AF position corresponding to the touch location. This visual feedback allows the user to confirm the actual touch position while looking at the monitor, preventing unintended position changes while maintaining ease of operation.
Solution Approach 2:
The patent introduces an intermediary visual indicator that mediates between the touch input and the AF position selection. This indicator acts as a bridge, translating the abstract touch position into a visible representation that the user can verify, thus resolving the precision issue without complicating the operation.
2Ease of operation
If the touch region is made larger to accommodate easier operation, then the user can more easily perform touch operations, but the precision of position selection decreases
Solution Approach 1:
The touch panel is functionally segmented into different zones: a larger touchable region for ease of operation and a precisely defined AF position selection region. The visual indicator helps the user understand which segment of the touch panel corresponds to which AF position, allowing both large touch area and precise selection.
Solution Approach 2:
Different regions of the touch panel are assigned different functional qualities. The overall touch region is made large for ease of operation, while specific sub-regions are mapped to precise AF positions. The visual indicator provides local quality information about which precise position will be selected based on where the user touches within the larger region.
3Productivity
If the user moves the touch quickly to change the AF position efficiently, then the operation speed increases, but the likelihood of accidental touch outside the intended region increases
Solution Approach 1:
The system performs preliminary action by displaying the visual indicator of the upcoming AF position before the user completes the touch movement. This allows the user to see where the touch will land and adjust their movement accordingly, maintaining high operation speed while preventing accidental selections through proactive visual guidance.
Data Source
AI summary
An electronic device includes a touch detection unit detecting a touch operation on a touch surface, a selection unit selecting a position on a display unit according to a touch movement, and a control unit performing control so that a specific process based on a selected position is performed, where when, subsequent to a first movement, a touch is released from a predetermined region of the touch surface, the specific process based on a position selected according to the first movement is not performed.