Touch Substrate Electrode Pattern Shape Consistency
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Solution Overview
Problem
Conventional out-cell touch substrates for flexible AMOLED displays have visually noticeable electrode patterns due to differences in optical properties between etched and non-etched regions, affecting the overall visual effects of the display screens.
Innovation Solution
A touch substrate design featuring interconnected electrode patterns with varying slopes and symmetrical insulation trenches, which are covered by an insulation layer and connected via a bridge, ensuring the shapes of the electrode patterns inside are consistent with their outer peripheries, thereby reducing light reflectance differences and visual noticeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional photolithography and etching techniques are used to form ITO electrode patterns, then the touch substrate can be manufactured with functional electrodes, but the electrode patterns become visually noticeable due to differences in light reflectance between etched and non-etched regions
Solution Approach 1:
The patent applies local quality by filling only specific regions (the interiors of electrode patterns) with transparent resin while leaving other regions unfilled. This creates localized optical property adjustments that reduce visual noticeability of electrode patterns without affecting the overall manufacturing process or electrical functionality of the touch substrate.
Solution Approach 2:
The patent utilizes color changes by employing transparent resin with specific optical properties that match or blend with the surrounding non-etched regions. This reduces the visual contrast between etched and non-etched areas, making the electrode patterns less noticeable while maintaining the structural integrity and electrical function of the electrodes.
2Device complexity
If regular-shaped electrode patterns are used for touch sensors, then the manufacturing process is simplified, but the visual effects of the display screen are degraded due to noticeable electrode patterns
Solution Approach 1:
The patent applies local quality by selectively filling the interior regions of regular-shaped electrode patterns with transparent resin. This localized treatment maintains the simple regular shapes for manufacturing ease while optically masking the electrode patterns to improve visual effects, thus resolving the contradiction between device complexity and visual quality.
3Measurement precision
If there are differences in light reflectance between etched and non-etched regions, then the electrode patterns can be clearly distinguished for functional purposes, but the overall visual effects of the display screen are affected
Solution Approach 1:
The patent utilizes color changes by introducing transparent resin with optimized optical properties into the electrode pattern interiors. This adjusts the light reflectance characteristics to match surrounding regions, reducing visual contrast while preserving the functional distinction between electrodes through maintained electrical properties and topographic features.
Solution Approach 2:
The patent applies copying by using transparent resin that replicates the optical properties of the non-etched regions. This creates a visual copy or match between filled electrode interiors and surrounding areas, making the electrodes visually imperceptible while maintaining their functional identity through electrical connectivity and structural form.
Data Source
AI summary
The present disclosure provides a touch substrate and a display device. Shapes of the inside of electrode patterns are formed to be in consistency with shapes of the outer peripheries of the electrode patterns, therefore difference of light reflectance between the trenches surrounding the electrode patterns and the inside of the electrode patterns is reduced. Accordingly, the likelihood that the electrode patterns are visually noticeable is lowered, thus raising the visual effects displayed by the display devices.