Auxiliary Electrode Touch Integration in Display Devices
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Solution Overview
Problem
The increasing complexity and manufacturing costs of display devices due to the addition of touch electrode layers complicate the manufacturing process and reduce efficiency.
Innovation Solution
A display device design featuring a substrate with a first electrode layer, an intermediate light emitting layer, and a second electrode, where auxiliary electrodes electrically connect multiple pixels within unit pixel groups, simplifying the touch electrode structure and reducing manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate touch electrode layer is added to the display panel, then touch input recognition capability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the touch electrode layer with the display electrode layer into a single integrated structure. The first electrode serves dual functions as both the display common electrode and the touch sensing electrode, eliminating the need for a separate touch electrode layer. This merging approach maintains touch input recognition capability while reducing device complexity and the number of manufacturing processes.
2Adaptability or versatility
If a separate touch electrode layer is added to the display panel, then touch input recognition capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges the touch electrode layer with the display electrode layer, allowing a single layer to perform both display and touch sensing functions. This integration eliminates the need for additional materials and manufacturing steps, thereby reducing manufacturing cost while maintaining touch input recognition capability.
Solution Approach 2:
The first electrode is designed with multi-functionality, serving as both the common electrode for display operation and the sensing electrode for touch input detection. This universal design allows a single component to fulfill multiple roles, reducing the overall component count and associated manufacturing costs.
3Adaptability or versatility
If a separate touch electrode layer is added to the display panel, then touch input recognition capability is improved, but manufacturing process efficiency decreases
Solution Approach 1:
The patent integrates the touch electrode layer with the display electrode layer into a single formation process. By combining the deposition or patterning steps for both electrodes into one process, the manufacturing cycle time is reduced and process efficiency is improved, while still achieving both display and touch sensing functionality.
Data Source
AI summary
A display device is provided. The display device includes a substrate including an active region in which a plurality of pixels are arranged; a first electrode layer disposed on the substrate and including a first electrode disposed in each pixel and an auxiliary electrode spaced apart from the first electrode and disposed along a boundary of each pixel; an intermediate layer disposed on the first electrode and including a light emitting layer; and a second electrode disposed on the intermediate layer, disposed in each pixel, and electrically connected to the auxiliary electrode; wherein a plurality of unit pixel groups, each including one or more pixels, are defined on the substrate, the respective second electrodes of the pixels belonging to each unit pixel group are electrically connected to each other by the auxiliary electrode, and the auxiliary electrodes belonging to different unit pixel groups are electrically separated from each other.