Touch Electrode Integration in Organic Light Emitting Layer
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Solution Overview
Problem
Current touch electrodes in display devices are manufactured independently and have a low integration level with the display device, leading to a cumbersome process and increased product volume.
Innovation Solution
A display substrate is designed with a touch electrode layer formed within the organic light emitting layer, which includes an insulating layer between the touch electrode and adjacent layers, allowing for a larger touch electrode area and improved touch signal sensing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If touch electrodes are manufactured independently of the display device, then the manufacturing process is simpler and more flexible, but the integration level is low resulting in cumbersome process and large product volume
Solution Approach 1:
The patent merges the touch electrode layer with the organic light emitting layer by forming the touch electrode layer within the organic light emitting layer during the same manufacturing process. This integration eliminates the need for separate touch electrode manufacturing steps, thereby improving integration level while maintaining manufacturing simplicity through process consolidation
2Measurement precision
If touch electrode area is increased to enhance touch signal sensing range, then touch signal sensing accuracy improves, but the device structure becomes more complex
Solution Approach 1:
The patent combines the touch electrode layer with the organic light emitting layer into a single integrated structure. This merging allows the touch electrode area to be increased without adding separate structural components, thereby improving touch signal sensing accuracy while avoiding increased device structural complexity
Solution Approach 2:
The organic light emitting layer serves dual functions: as the light-emitting functional layer and as the substrate for the touch electrode layer. This multi-functionality allows the touch electrode area to be expanded within the existing layer structure without requiring additional dedicated structural elements, thus improving sensing accuracy without proportionally increasing device complexity
3Device complexity
If touch electrodes are integrated into the organic light emitting layer, then integration level and touch sensing range increase, but the manufacturing process becomes more complex
Solution Approach 1:
The patent merges the formation of the touch electrode layer with the formation of the organic light emitting layer into a single manufacturing process step. By applying conductive material to form the touch electrode layer within the organic light emitting layer during the same process, the patent achieves high integration level while actually reducing manufacturing process complexity compared to separate manufacturing steps
Solution Approach 2:
The patent performs the touch electrode layer formation as a preliminary action within the organic light emitting layer manufacturing process. By preparing the touch electrode structure in advance during the organic layer formation, subsequent manufacturing steps are simplified, thereby reducing overall manufacturing process complexity while maintaining high integration level
Data Source
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AI summary
The present disclosure relates to a display substrate, a method for manufacturing the same and an electronic apparatus. The display substrate includes: a base (1); a thin film transistor (2), formed on a side of the base (1); an organic light emitting layer (3), formed on a side of the thin film transistor (2) away from the base (1); and a touch electrode layer (4), formed in the organic light emitting layer (3).