Flexible Touch Display Electrode Integration
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Solution Overview
Problem
The manufacturing process of OLED touch films, which involves a bonding process, increases complexity and thickness, limiting the width of touch sensing electrodes and reducing light transmission and emitting efficiency due to their distance from the light-emitting layer.
Innovation Solution
A flexible touch display design with a base, light-emitting portion, inorganic and organic encapsulation layers, and sensing electrodes, where the sensing electrodes are positioned closer to the light-emitting layer, allowing for wider widths and improved manufacturing ease, using materials like Al2O3, TiO2, ZrO2, and SiNX layers for enhanced encapsulation and barrier properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a bonding process is used to fabricate the touch film separately, then the touch film can be manufactured, but the manufacturing process complexity increases and the touch film thickness increases
Solution Approach 1:
The patent combines the touch control layer and touch sensing electrode layer with the OLED display layer structure, forming an integrated device. The touch sensing electrodes are positioned between the pixel defining layer and the encapsulation layer, eliminating the need for separate bonding processes and reducing manufacturing complexity while maintaining touch film functionality.
2Ease of manufacture
If the touch sensing electrodes are positioned far from the light emitting layer, then the manufacturing is simpler, but the line width cannot be made large enough, reducing light transmission efficiency
Solution Approach 1:
The patent positions the touch sensing electrodes in a specific vertical dimension within the display structure, between the pixel defining layer and encapsulation layer. This spatial arrangement allows the electrodes to be closer to the light emitting layer, enabling larger line widths that improve light transmission efficiency while maintaining manufacturing feasibility through the integrated layer structure.
Data Source
AI summary
The present invention provides a flexible touch display and a display device. The flexible touch display includes a base, a light emitting portion, a first inorganic encapsulation layer, a first insulating layer, multiple first sensing electrodes, and multiple second sensing electrodes. The light emitting portion includes a pixel defining layer and multiple pixels. The first sensing electrodes are arranged spaced apart from each other on the first insulating layer. Each second sensing electrode and each first sensing electrode have a width less than or equal to a width of a bank of the pixel defining layer.