Optical Touch Device Four-Sensor Coverage Adaptability
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Solution Overview
Problem
Existing optical touch technologies require adjustments in module structure and size to accommodate different touch panel sizes and ratios, leading to increased production costs and reduced resource utilization efficiency.
Innovation Solution
The optical touch device employs four optical capturing units disposed in different directions at predetermined angles, allowing for wider touch surface coverage without structural adjustments, using a control unit to calculate touch points based on optical sensing information and covering areas calculated by specific equations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the optical touch module structure and size are adjusted in proportion to the touch panel size, then the spatial requirements of different touch products are met, but the production costs increase and resource utilization efficiency decreases
Solution Approach 1:
The patent applies universality by designing an optical touch module with a fixed structure that can detect touch points across touch panels of different sizes and ratios. The module uses four optical capturing units arranged in a specific configuration that enables it to adapt to various display panel dimensions without requiring structural modifications, thereby reducing production costs and improving resource utilization while maintaining compatibility across different product specifications
2Area of stationary object
If four optical capturing units are arranged at predetermined angles with predetermined distances from the touch surface, then wider touch surface coverage is achieved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the touch surface into multiple detection zones, with each of the four optical capturing units responsible for capturing light from specific regions. This segmentation allows the system to cover a wider touch surface area while maintaining manageable complexity through systematic arrangement and specialized control algorithms that process information from each unit
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 configuration enables the optical touch device to effectively cover touch surfaces of various sizes and ratios, reducing production costs and improving resource utilization while maintaining accuracy in touch detection.
Implementation Method 1
the first to fourth optical capturing units are coupled to the control unit and disposed on a side of the optical touch device close to the touch surface to obtain at least one piece of optical sensing information
Data Source
AI summary
An optical touch device and a touch detecting method using the same are provided. The optical touch device is suitable for use with a touch surface and includes a control unit and first to fourth optical capturing units. The first to fourth optical capturing units are disposed on a side of the optical touch device close to the touch surface. The first to fourth optical capturing units are respectively disposed at predetermined distances from the touch surface and are disposed based on predetermined angles. A touch covering area of each of the first to fourth optical capturing units is obtained respectively based on the predetermined distance and the predetermined angle. The touch covering area is positively correlated to the predetermined distance. At least one touch point on the touch surface is calculated by the control unit based on optical sensing information captured by the first to fourth optical capturing units.