Touch Sensor Mode Switching via Finger Lift Detection
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Solution Overview
Problem
Existing input devices, such as touch pads and touch screens, face difficulties in seamlessly switching between position control and motion continuation modes, making it cumbersome to perform tasks like scrolling and dragging.
Innovation Solution
A sensor panel system that allows users to invoke position control by placing multiple fingers on the panel and switch to motion continuation mode by lifting one or more fingers off, with the option to invoke this mode at the edge or anywhere on the panel, using a virtual control ring or joystick for enhanced navigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If finger motion at the edge of the touch pad is used to initiate motion continuation modes, then scrolling or dragging can be performed, but it is difficult to switch between position control and motion continuation modes
Solution Approach 1:
The system dynamically transitions between position control mode and motion continuation mode based on real-time finger position and motion state. The mode switching is not static but adapts to user interaction patterns, allowing seamless transition by detecting finger lift at edge zones or sustained motion patterns, thereby simplifying operation without adding complex physical switches
Solution Approach 2:
The touch-sensitive panel serves multiple functions: it detects both position control inputs (finger placement and movement) and motion continuation triggers (edge zone finger lift or sustained motion). This multi-functionality consolidates mode switching capabilities into the existing touch interface, eliminating the need for separate controls and reducing overall device complexity
2Productivity
If multiple fingers are placed on the sensor panel for position control, then precise cursor control is achieved, but continuous finger movement is required for navigation, reducing efficiency
Solution Approach 1:
The system performs preliminary action by detecting finger lift at edge zones or sustained motion patterns to pre-trigger motion continuation mode. This allows the system to anticipate user intent and initiate continuous scrolling or dragging before the user completes their navigation gesture, reducing the time required for manual finger movement across the panel
Solution Approach 2:
Once motion continuation mode is activated, the system maintains continuous scrolling or dragging action without requiring the user to continuously move their fingers. The useful action of navigation continues automatically based on the initial trigger, significantly improving productivity by eliminating repetitive finger movements and reducing time loss
Data Source
AI summary
Gestures for converting from a position control mode to a motion continuation mode are disclosed. A position control mode can be invoked when the user simultaneously places two or more fingers upon a sensor panel. The fingers can then be moved around to effect position control. A motion continuation mode can be invoked when one or more fingers are lifted off (but at least one finger remains in contact with the sensor panel). If the motion continuation mode is invoked, a virtual control ring can be generated, and scrolling of the viewable area or dragging of the cursor or object can continue in a particular direction specified by a velocity vector pointed in the direction of finger movement at the time the motion continuation mode is invoked, and having a magnitude proportional to the velocity of the finger at the time the motion continuation mode was invoked.