Remote Cursor Positioning With Virtual Arc Mapping
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Solution Overview
Problem
The movement of a cursor on a smart television screen is affected by the positional and directional relationship between the remote control device and the screen, leading to inaccurate control and reduced user experience.
Innovation Solution
A method for determining the cursor position on the screen by calculating deflection angles and offset distances using virtual arc surfaces, independent of the device-screen distance and pointing direction variations, ensuring consistent cursor movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the cursor position is determined based on the actual distance and pointing direction between the remote control device and the screen device, then the cursor position can be calculated, but the cursor movement distance varies when the device is deflected by the same angle at different distances
Solution Approach 1:
The patent introduces a virtual arc surface as an intermediary mathematical model between the remote control device and the screen device. This virtual arc surface with a predetermined radius serves as a mediator to transform the deflection angle measurement into a consistent cursor movement distance, eliminating the direct dependency on actual device-screen distance while maintaining accurate cursor position determination.
Solution Approach 2:
The patent changes the parameter used for cursor position calculation from actual physical distance and pointing direction to a predetermined virtual arc radius. By using a fixed virtual arc radius instead of variable actual distances, the system achieves consistent cursor movement distances regardless of the user's actual position or pointing direction, while still accurately determining cursor position.
2Adaptability or versatility
If the cursor movement is based on actual distance and angle calculations, then the system can adapt to different positions, but the cursor movement becomes inconsistent when distance varies
Solution Approach 1:
The virtual arc surface acts as a standardized intermediary that translates variable physical positions into a unified measurement system. By measuring deflection angles relative to this predetermined virtual arc, the system maintains adaptability to different user positions while ensuring consistent cursor movement results, resolving the contradiction between versatility and precision.
Solution Approach 2:
The patent creates an equipotential measurement space using the virtual arc surface. All measurement calculations are performed within this standardized virtual space where the arc radius is constant, ensuring that cursor movement distance remains consistent regardless of the user's actual physical position or the device's pointing direction, thereby achieving measurement consistency across different conditions.
Data Source
Figure 1A~1B
Figure 1C
Figure 1D
AI summary
A cursor position determining method and a remote control device are disclosed. The method includes: The remote control device determines a first deflection angle of a pointing direction of the remote control device relative to a first reference line when the pointing direction of the remote control device is deflected; the remote control device determines a first offset distance based on the first deflection angle and a first virtual arc surface, where a central position of the first virtual arc surface is on the first reference line, and a tangent at the central position of the first virtual arc surface is perpendicular to the first reference line; and the remote control device determines, based on a central position of a screen device and the first offset distance, a cursor position that is of a cursor corresponding to the remote control device and that is on the screen device. In this method, when a distance between the remote control device and the screen device varies or the pointing direction of the remote control device varies, if the remote control device is deflected by a same angle, a distance by which the cursor moves on the screen device is still the same, so that a user can accurately control movement accuracy of the cursor.