Optical Touch Width Detection via Light Intensity Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical touch apparatuses are limited to screens of fixed sizes due to fixed lens distances, requiring manual adjustment and measurement for different screen sizes, leading to inconvenience in use.
Innovation Solution
An optical touch apparatus with adjustable width, equipped with sensing components, a light emitting component, and a width detecting module that automatically determines the distance between sensing components by analyzing light intensity, using a light projecting module, image capturing module, and computing module to calculate the distance based on waveform characteristics and lookup tables or curve formulas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the optical touch apparatus is designed to be expandable with adjustable distance between optical lenses, then it can be applied to screens of different sizes, but manual measurement and input are required which causes extreme inconvenience in use
Solution Approach 1:
The optical touch apparatus automatically detects the distance between optical lenses using light emitting and sensing components, eliminating the need for manual measurement and input. The system performs self-measurement through triangulation based on light intensity differences, making the device serve itself rather than requiring user intervention.
Solution Approach 2:
The patent replaces manual mechanical measurement with an optical detection system. Light emitting components and sensing components automatically measure the distance between optical lenses through light intensity analysis, substituting the mechanical measurement process with an optical field-based detection method.
2Device complexity
If the distance between optical lenses is fixed, then the optical touch apparatus structure is simple, but it can only be applied to screens of fixed size
Solution Approach 1:
The patent makes the optical touch apparatus dynamically adaptable by introducing expandable structures that allow the distance between optical lenses to be adjusted. The system includes expansion mechanisms that enable the apparatus to change its physical configuration to match different screen sizes while maintaining automatic detection capabilities.
Solution Approach 2:
The optical touch apparatus is designed with universal applicability through its expandable structure and automatic distance detection capability. The same device can be configured for different screen sizes by adjusting the distance between optical lenses, which are then automatically detected, allowing one device to serve multiple screen configurations.
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 convenient use with touch planes or panels of various sizes by automatically detecting and adjusting the distance between sensing components, eliminating the need for manual measurement and input, thus improving usability.
Implementation Method 1
The light emitting component is controlled by the width detecting module to emit a light
Implementation Method 2
The other of the sensing components is controlled by the width detecting module to sense intensity of the light
Data Source
AI summary
An optical touch apparatus and a width detecting method thereof are provided. The optical touch apparatus includes at least two sensing components, a light emitting component, and a width detecting module. The sensing components are configured to sense a touch object located on a touch plane. The light emitting component is configured to be a light source of the touch plane and is disposed adjacent to one of the sensing components. The width detecting module is coupled to the light emitting component and the other of the sensing components. The light emitting component is controlled by the width detecting module to emit a light. The other of the sensing components is controlled by the width detecting module to sense intensity of the light. The width detecting module detects a distance between the sensing components according to the sensed intensity of the light.