Touch Panel Border Region Transparent Conducting Lines
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Solution Overview
Problem
Conventional touch panels with opaque metal conducting lines in the border region limit the variability and design of light transmission patterns, making it difficult to incorporate decorative or indicative patterns without overlapping the conducting lines, especially in slim border designs.
Innovation Solution
Replacing parts of the opaque conducting lines with transparent conducting lines in the border region, allowing light transmission patterns to partially overlap the signal transmission device, and using transparent dummy lines to enhance design variability and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If opaque metal conducting lines are used in the border region, then signal transmission is ensured, but light transmission pattern design freedom is limited
Solution Approach 1:
The patent applies local quality by using transparent conducting lines in the border region where light transmission patterns are needed, while maintaining opaque conducting lines in the touch sensing area where signal transmission is critical. This localized differentiation allows the border region to support both signal transmission and light transmission pattern display, resolving the contradiction between signal transmission reliability and design freedom.
Solution Approach 2:
The patent changes the optical parameter (transparency) of the conducting lines in the border region from opaque to transparent. This parameter change allows the conducting lines to transmit light while still conducting electrical signals, enabling light transmission patterns to be displayed in the border region without being blocked by opaque lines, thus improving design freedom.
2Adaptability or versatility
If opaque conducting lines occupy the border region, then signal transmission device functionality is maintained, but design variability of light transmission patterns is reduced
Solution Approach 1:
The patent differentiates the border region from the main touch area by using transparent conducting lines in the border region. This local quality change expands the available area for light transmission patterns into the border region, increasing design variability while maintaining signal transmission functionality through the transparent lines.
3Adaptability or versatility
If transparent conducting lines are used in the border region, then light transmission pattern design freedom is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the conducting line structure into two parts: opaque conducting lines in the touch sensing area and transparent conducting lines in the border region. This segmentation allows each region to be optimized for its specific function while using standard transparent conducting oxide materials and processes, managing manufacturing complexity through clear spatial differentiation.
Solution Approach 2:
The patent employs composite material strategy by combining transparent conducting oxide (TCO) materials with different optical properties in different regions. The TCO in the border region is formulated to be transparent, while the TCO in the touch area maintains opaque properties, creating a composite structure that achieves both optical and electrical functionality.
Data Source
AI summary
A touch panel including a touch region, a border region, a signal transmission device, and a light transmission pattern is provided. The border region is disposed on at least one side of the touch region. The signal transmission device is disposed in the border region. The light transmission pattern is disposed in the border region. The light transmission pattern partially overlaps the signal transmission device along a vertical projection direction. The signal transmission device includes at least one transparent conducting line. The transparent conducting line overlaps partial the light transmission pattern in the vertical projection direction.