Adjusting Structure for Optical Touch Light Curtain Alignment
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Solution Overview
Problem
Optical touch systems face challenges in maintaining suitable touch sensitivity due to variable distances between the light curtain and the display surface, and sensitivity is further affected when the screen is tilted, making operation inconvenient.
Innovation Solution
An adjusting structure with interconnected spherical and rod elements allows for precise rotation and movement of the light curtain generating module, enabling the light curtain to be adjusted parallel to the display surface, maintaining a consistent distance and angle for stable touch sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the distance between the light curtain and the display surface is increased, then the optical touch system can detect light reflection from greater distances, but the touch sensitivity becomes too high causing false detections when the user's finger is away from the screen
Solution Approach 1:
The patent employs an adjustable mounting structure that allows the light curtain generating module to be dynamically positioned at different distances from the display surface. This enables the system to adapt the light curtain distance according to specific application requirements, optimizing touch sensitivity while preventing false detections. The adjustable mechanism transforms a static distance parameter into a dynamic one that can be configured based on operational needs.
2Reliability
If the distance between the light curtain and the display surface is decreased, then the touch sensitivity is reduced preventing false detections, but the light curtain will not be detected unless the user's finger is very close to the screen
Solution Approach 1:
The adjustable mounting structure enables the system to optimize the distance between the light curtain and display surface for different usage scenarios. By making this parameter dynamically adjustable rather than fixed, the system can achieve optimal balance between preventing false detections and maintaining ease of operation, allowing users to operate the touch screen from comfortable distances without requiring the light curtain to be extremely close to the display surface.
Solution Approach 2:
The patent changes the physical parameter of light curtain distance from a fixed value to an adjustable variable. This parameter change allows the system to optimize touch detection performance by selecting the appropriate distance based on specific application requirements, thereby resolving the contradiction between false detection prevention and operational convenience.
3Adaptability or versatility
If the light curtain is generated to be tilted with respect to the display surface on a tilted wall, then the light curtain can adapt to the wall orientation, but the touch sensitivity of the optical touch system is affected making user operation inconvenient
Solution Approach 1:
The mounting structure provides dynamic adjustment capabilities that allow the light curtain generating module to be positioned and oriented correctly on tilted surfaces. This enables the system to maintain optimal light curtain orientation relative to the display surface even when installed on tilted walls, preserving touch sensitivity and user operation convenience while adapting to various installation environments.
Solution Approach 2:
The patent introduces additional adjustment dimensions (angular orientation) beyond simple distance adjustment. By enabling multi-dimensional positioning including angular adjustment, the system can compensate for tilted wall installations and maintain proper light curtain alignment with the display surface, thereby preserving touch sensitivity across different installation orientations.
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
The solution ensures stable and consistent touch sensitivity by allowing adjustable alignment of the light curtain relative to the display surface, improving user experience by maintaining optimal sensitivity regardless of screen orientation.
Implementation Method 1
The first spherical portion is adapted to move with respect to the first rod to drive the second plate to rotate with respect to the first plate about the first axis when the first rod rotates
Data Source
AI summary
An adjusting structure includes a first plate, a second plate opposite to the first plate, a first connection element, a second connection element and a third connection element. The second plate has a first connection portion, a second connection portion, and a third connection portion. The first connection element has a first spherical portion and a first rod. The first spherical portion is rotatably coupled to the first connection portion. The first rod is engaged through the first spherical portion and rotatably fixed to the first plate. The second connection element has a second spherical portion and a second rod. The second spherical portion is rotatably coupled to the second connection portion. The second rod is engaged through the second spherical portion and rotatably fixed to the first plate. The third connection element is connected to the second plate and the first plate.