Touch Panel Light Receiving Element Placement for Precision
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Solution Overview
Problem
Current touch panels face challenges in precision and cost-effectiveness due to the limited number of light receiving elements compared to light emitting elements, leading to reduced detection accuracy and increased fabrication costs, as well as potential degradation in reaction speed.
Innovation Solution
A touch panel design featuring a substrate with a greater number of light receiving elements than light emitting elements, where light receiving elements are strategically disposed between and adjacent to light emitting elements, allowing for precise detection of touch positions and improved reaction speed while minimizing fabrication costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of light receiving elements is increased to improve detection precision, then measurement precision is improved, but device complexity and fabrication cost increase
Solution Approach 1:
The patent applies partial action by strategically positioning a limited number of light receiving elements only at critical locations (corners and edges) rather than uniformly distributing them across the entire touch panel. This selective placement achieves adequate detection precision for touch position calculation while avoiding the complexity and cost of having excessive light receiving elements throughout the panel.
Solution Approach 2:
The patent segments the touch panel into distinct regions (corner regions and edge regions) and places light receiving elements specifically in these segmented areas. This segmentation approach allows the system to achieve effective touch detection using fewer elements by focusing detection capability on the panel boundaries where touch events are most commonly detected.
2Measurement precision
If the number of light receiving elements is increased to improve detection precision, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
By implementing partial action, the patent reduces the total number of light receiving elements required, directly lowering fabrication costs while maintaining sufficient detection precision through strategic placement at corner and edge regions where touch detection is most critical.
Solution Approach 2:
The patent employs cost-effective light receiving elements (such as photodiodes or phototransistors) that can be easily manufactured and integrated into the touch panel structure, reducing overall manufacturing cost while achieving the required detection performance.
3Measurement precision
If the space between light receiving elements is reduced to improve detection precision, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by creating different spacing configurations in different regions of the touch panel. Light receiving elements are positioned with specific spacing in corner regions versus edge regions, optimizing detection precision for each local area's specific requirements rather than using uniform spacing throughout the entire panel.
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 design enhances the precision of touch detection, reduces fabrication costs, and improves the reaction speed of the touch panel by utilizing a higher number of light receiving elements, which receive beams from light emitting elements, thereby accurately calculating touch positions.
Implementation Method 1
a plurality of light emitting elements; and a plurality of light receiving elements
Implementation Method 2
light receiving elements... receive beams from light emitting elements
Data Source
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AI summary
A touch panel includes: a substrate; a plurality of light emitting elements; and a plurality of light receiving elements, wherein the number of light receiving elements may be greater than the number of light emitting elements.