Optical Touch System Grouping for Multi-Touch Complexity
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Solution Overview
Problem
Conventional optical touch systems experience increased computational complexity and calculation errors when handling multiple touch devices, particularly due to shielding and ghost issues.
Innovation Solution
The optical touch system divides touch devices into groups based on their characteristics and operational capabilities, allowing for time-division handling to reduce computational complexity and prevent calculation errors, utilizing a control unit to manage operations and a calculating unit to determine touch point positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple touch devices are handled simultaneously in conventional optical touch systems, then multi-touch operation capability is improved, but computational complexity increases and calculation errors occur
Solution Approach 1:
The patent segments the set of touch devices into multiple groups, where each group is handled separately by dedicated image capturing modules. This segmentation allows simultaneous multi-touch operation while reducing the computational complexity for each individual calculation, as each module processes only a subset of touch devices rather than all devices together
2Adaptability or versatility
If multiple touch devices are handled simultaneously, then multi-touch operation capability is improved, but calculation errors such as shielding and ghost issues increase
Solution Approach 1:
By dividing touch devices into separate groups and assigning dedicated image capturing modules to each group, the patent eliminates interference between simultaneous touch operations. Each module independently captures images for its assigned group, preventing shielding effects and ghost issues that occur when all devices share the same imaging resources
Solution Approach 2:
The patent introduces a control unit as an intermediary that coordinates the operation of multiple image capturing modules. This control unit manages the timing and coordination between modules, ensuring that each module operates on its assigned group of touch devices without interference, thereby maintaining high calculation accuracy in multi-touch scenarios
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
This approach effectively simplifies computational complexity and reduces calculation errors by managing touch devices in groups, enabling efficient handling of multiple touch devices without increasing complexity.
Implementation Method 1
an optical device configured to obtain images corresponding to touch points generated by touch devices in one of the plurality of groups
Data Source
AI summary
An optical touch system includes a plurality of touch devices and an electronic device. The electronic device includes a touch display unit configured to generate a plurality of touch points when the plurality of touch devices are contacted thereon, a control unit configured to divide the plurality of touch devices into a plurality of groups according to characteristics of the plurality of touch devices to control or handle operations of the plurality of groups in time division, an optical device configured to obtain images corresponding to touch points generated by touch devices in one of the plurality of groups, and a calculating unit configured to receive the images obtained by the optical device to calculate positions of the touch points corresponding to the images.