Modular Multi-Touch System with Shared Reflective Frames
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Solution Overview
Problem
Conventional optical touch screens face limitations in size enlargement and high manufacturing costs due to hardware changes, restricting their application beyond 100 inches.
Innovation Solution
A multi-touch system with touch sensing sub-systems arranged in rows or arrays, featuring sensors at corners with light reflective frames on longitudinal and end sides, allowing dynamic resizing and eliminating reflective frames between sub-systems, which reduces hardware redesign needs and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the size of conventional optical touch screen is enlarged over 100 inches, then the touch screen can provide larger display area, but the manufacturing cost becomes sky high due to changes of hardware standards
Solution Approach 1:
The touch sensing system is divided into multiple independent touch sensing sub-systems that can be manufactured separately using standard hardware specifications. Each sub-system handles a specific region, allowing mass production with consistent quality and cost control, while the overall system achieves large display area through modular arrangement.
2Area of stationary object
If conventional optical touch screen uses hardware changes to achieve large size, then the touch screen can be enlarged, but the device complexity increases due to hardware redesign
Solution Approach 1:
The system uses universal light reflective frames that serve multiple functions: they define the sensing region for each sub-system, provide structural support, and enable seamless optical coupling between adjacent sub-systems. This multi-functional design eliminates the need for specialized hardware components for each sub-system, reducing overall device complexity.
Solution Approach 2:
Adjacent touch sensing sub-systems share common light reflective frames, merging structural and optical functions across sub-system boundaries. This sharing approach reduces the total number of components needed and simplifies the overall hardware architecture while maintaining large screen capability.
3Manufacturing precision
If light reflective frames are configured between adjacent touch sensing sub-systems, then each sub-system has clear boundaries, but the manufacturing cost increases and seamless appearance is compromised
Solution Approach 1:
Adjacent touch sensing sub-systems share common light reflective frames, merging structural and optical functions across sub-system boundaries. This sharing approach reduces the total number of components needed and simplifies the overall hardware architecture while maintaining large screen capability.
Solution Approach 2:
The light reflective frames serve dual purposes: they provide clear optical boundaries for sensor detection while simultaneously creating a seamless visual appearance when viewed from the front. This multi-functionality eliminates the need for additional components to achieve seamless appearance, reducing manufacturing cost.
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 the creation of large-size, cost-effective multi-touch systems with increased practicability and maneuverability, avoiding the need for hardware redesign and maintaining high accuracy.
Implementation Method 1
The light emission units radiate the light onto the light reflective frames and the image sensing units capture the light-and-shade status of the light reflective light from the light reflective frames
Data Source
AI summary
A multi-touch system is provided. In the multi-touch system, there is a plurality of touch sensing sub-systems. The touch sensing sub-systems are arranged in a touch sensing row in sequence and the touch sensing row has a pair of longitudinal sides opposite to each other and a pair of end sides opposite to each other. A light reflective frame is configured on one of the longitudinal sides and both of the end sides. Each of the touch sensing sub-systems comprises at least two sensors arranged at two corners of the corresponding touch sensing sub-system at one longitudinal side opposite to the other longitudinal side having the light reflective frame arranged thereon. A sensing range of both of the sensor covers the corresponding touch sensing sub-system.