Touchpad Direction Determination for Display Control
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Solution Overview
Problem
Existing screen display apparatuses using touchpads for operation face issues with accurately determining the direction of the operating device, leading to incorrect cursor movement and reduced user operability due to misrecognition of the device's orientation, especially when held at angles or in different orientations.
Innovation Solution
A display control device that includes a touch information detecting unit, a direction determining unit, and a screen data generating unit to accurately determine the user's intended direction based on touch information, such as position and trajectory data from the touchpad, ensuring proper cursor positioning and image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operating device is made top-bottom and left-right symmetrical to allow free pointing, then the ease of operation is improved, but the accuracy of direction determination deteriorates because the device cannot distinguish between different holding orientations
Solution Approach 1:
The system uses the user's own finger movements and touchpad operations to automatically determine device orientation. The direction determining unit analyzes touch information (position, movement trajectory, pressure patterns) to infer whether the device is held upright or inverted, eliminating the need for separate sensors or manual configuration. The system serves itself by deriving orientation data from the natural act of using the device.
Solution Approach 2:
The patent replaces mechanical/directional sensors with a software-based direction determination system that processes touchpad data. Instead of using hardware sensors to detect device orientation, the system uses algorithms that analyze touch patterns, finger movement trajectories, and contact pressure distributions to computationally determine the device's operational direction.
2Device complexity
If conventional direction detection methods using sensors are used, then the device complexity is reduced, but the reliability of direction recognition deteriorates when the device is held at angles or in different orientations
Solution Approach 1:
The touchpad, which is already a standard component for input, is made to serve multiple functions: it detects both the user's input commands and the device's orientation information. By analyzing touch patterns and finger movement characteristics on the touchpad surface, the system extracts directional information without adding separate sensors, making the touchpad universal for both input and orientation detection.
Solution Approach 2:
The system continuously monitors touch information during device operation and uses this feedback to dynamically determine the device direction. The direction determining unit processes real-time touch data (position changes, movement speed, pressure variations) to infer orientation, allowing the system to adapt to different holding positions and maintain reliable direction recognition throughout the interaction.
Data Source
AI summary
The display control device is a display control device which receives a signal from the operating device having a touchpad and generates screen data to be displayed on a screen, the display control device including: a touch information detecting unit (201) which detects touch information including position information about a position on the touchpad that is touched with a finger of a user during operation of the touchpad; a direction determining unit (203) which determines a direction intended by the user, using a characteristic which is indicated by the touch information detected by the touch information detecting unit (201) and which results from the operation on the touchpad with the finger; and a screen data generating unit (205) which generates the screen data depending on the direction determined by the direction determining unit (203).