Hover-Labeled Touch Pad Input for Accurate Screen Alignment
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Solution Overview
Problem
Conventional touch pads face alignment issues between the input surface and display surface during handwriting or drawing operations, leading to inaccuracies in user input positioning.
Innovation Solution
A touch device and method that performs hover detection and touch detection on an object above the touch pad, generating position labeling patterns on the screen based on hover detection information to align the input position accurately, using a capacitive touch pad with adjustable detection thresholds and a processing unit to generate touch input instructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch pad is used to perform handwriting or drawing operation, then input functionality is provided, but alignment problem occurs between input surface and display surface
Solution Approach 1:
A virtual alignment layer is introduced between the physical touch pad and the display screen. This layer receives touch coordinates from the touch pad and transforms them into corresponding display coordinates, solving the alignment problem between the input surface and display surface without requiring physical integration of the two surfaces.
Solution Approach 2:
The patent replaces the mechanical alignment approach (physically aligning touch pad and display surfaces) with an information processing approach using coordinate transformation. The control unit processes touch coordinates and converts them into display coordinates, substituting mechanical alignment with computational transformation to achieve accurate input positioning.
2Adaptability or versatility
If input surface and display surface are located at different positions, then device flexibility is improved, but alignment problem affects input position accuracy
Solution Approach 1:
A virtual alignment layer is introduced between the physical touch pad and the display screen. This layer receives touch coordinates from the touch pad and transforms them into corresponding display coordinates, solving the alignment problem between the input surface and display surface without requiring physical integration of the two surfaces.
Solution Approach 2:
The patent changes the parameter representation from physical coordinates to logical coordinates. By transforming touch pad coordinates into display coordinates through coordinate transformation, the system maintains the flexibility of separate surface positions while achieving accurate input positioning through parameter conversion.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate user control of input positions on the input surface by aligning it with the display surface, improving the smoothness of touch operations.
Implementation Method 1
using a capacitive touch pad with adjustable detection thresholds
Data Source
AI summary
A touch device is provided, including a touch pad, a screen, a control unit, and a processing unit. The touch pad is adapted to perform hover detection and touch detection on an object. The screen is adapted to display an operating interface. The control unit is configured to: determine that the object is currently in a hover state or a touch state; output hover detection information when the object is currently in the hover state; and output touch detection information when the object is currently in the touch state. The processing unit is electrically coupled to the control unit and the screen, and configured to generate a position labeling pattern based on the hover detection information and display the position labeling pattern on the operating interface, and generate a touch input instruction adapted to control the operating interface based on the touch detection information. A touch method is further provided.