Touch Display Autorotation Control via Motion and Touch Sensor Fusion
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Solution Overview
Problem
Accidental autorotation of touch-sensitive displays can lead to frustration and poor user experience, as slight tilting of the device can cause unintended rotation of UI content, resulting in missed targets or incorrect object selection.
Innovation Solution
An electrical device with a controller, touch sensors, and a motion sensor that detects the presence and motion of a pointing object, preventing automatic content rotation until a UI object is chosen by storing and maintaining object coordinates during orientation changes, thereby ensuring accurate object selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If autorotation functionality is enabled to provide larger content reproduction and user input area, then display usability is improved, but accidental rotation occurs causing user frustration and interrupting UI operation
Solution Approach 1:
The patent introduces an intermediary mechanism that combines motion sensor data with touch sensor coordinates to mediate between the autorotation function and accidental rotation prevention. The system uses the touch sensor coordinates as a reference frame to determine whether detected motion represents intentional rotation (when coordinates remain stable) or accidental tilting (when coordinates shift significantly), thereby controlling whether rotation should occur.
Solution Approach 2:
The system implements feedback by continuously monitoring touch sensor coordinates and using this information to adjust rotation behavior. When the pointing object's coordinates remain stable during device motion, the system interprets this as intentional rotation and allows it. When coordinates shift significantly, the system interprets this as accidental tilting and prevents rotation, creating a closed-loop control system that adapts to user intent.
2Adaptability or versatility
If the display rotates automatically in response to device tilting, then content orientation adapts to user position, but the pointing object target moves causing missed selections
Solution Approach 1:
The patent uses touch sensor coordinates as an intermediary reference frame to decouple content rotation from device orientation changes. By monitoring whether coordinates of the pointing object remain stable during device motion, the system determines if rotation should occur, thereby preventing the target position from shifting unexpectedly while still allowing intentional orientation adaptation.
Solution Approach 2:
The system performs preliminary action by establishing a reference frame based on touch sensor coordinates before allowing rotation to occur. This pre-established reference frame serves as a stable coordinate system that remains consistent during intentional rotation, ensuring that the pointing object's position relative to the display remains predictable and selectable.
3Measurement precision
If touch sensors detect pointing object coordinates to enable precise interaction, then user input accuracy is improved, but system complexity increases due to coordinate transformation requirements
Solution Approach 1:
The patent merges the touch sensor coordinate system with the rotation control logic into a unified reference frame. Instead of treating coordinates as separate data that requires transformation, the system uses the touch coordinates directly as the reference for determining rotation intent, eliminating the need for complex coordinate transformations while maintaining precision.
Solution Approach 2:
The touch sensor coordinates serve a dual purpose: they detect the pointing object's position for user input and simultaneously provide the reference frame for controlling rotation behavior. This self-service approach allows the same data to fulfill multiple functions, reducing system complexity while maintaining measurement precision.
Data Source
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AI summary
The present invention relates to display (100) in an electrical device and a method of enhancing interaction with user. The display comprises: a controller (140), a content displaying surface (106), a touch sensitive portion comprising one or several touch sensors (108), for providing the controller with information about presence of a pointing object close to the surface, a motion sensor (150) for providing motion of the display. The controller (140) is configured to control content output on the displaying surface and adjust the content output with respect to information from the touch sensor and the motion senor (150).