Integrated Touch OLED Panel Via Hole Signal Routing
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Solution Overview
Problem
Existing touch OLED display panels face challenges in achieving thinness due to the separate formation and stacking of OLED and touch panels, resulting in increased thickness and the need for multiple bonding processes for signal wire connections.
Innovation Solution
A touch OLED display panel design where the touch structure layer is integrated within the OLED display panel, utilizing a thin film encapsulation layer with via holes as signal wire channels, allowing the touch and display signal wires to share a bonding area and be connected by a single flexible printed circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the OLED display panel and touch panel are formed separately and stacked together, then the touch functionality is integrated, but the overall thickness increases
Solution Approach 1:
The patent merges the OLED display panel and touch panel into a single integrated structure by fabricating touch electrodes directly on the OLED display panel substrate. The touch electrode array is formed in the same structural layer as the display signal wires, eliminating the need for separate stacking and reducing overall thickness while maintaining both display and touch functionalities.
Solution Approach 2:
The patent creates a multi-functional structural layer that simultaneously serves as the substrate for both display signal wires and touch signal wires. This universal layer handles both display driving signals and touch sensing signals, allowing one layer to perform multiple functions and reducing the need for additional separate layers.
2Reliability
If separate bonding areas are provided for array substrate and touch layer, then signal connections are established, but the number of bonding processes increases to two times
Solution Approach 1:
The patent merges the bonding areas for the array substrate and touch layer into a single shared bonding area. Both display signal wires and touch signal wires are connected to the flexible printed circuit board through this unified bonding area, reducing the number of bonding processes from two to one while maintaining reliable signal connections.
Solution Approach 2:
The bonding area is designed to serve dual purposes: connecting both display signal wires and touch signal wires to the flexible printed circuit board. This universal bonding area handles multiple signal types simultaneously, eliminating the need for separate bonding areas and processes for each signal type.
3Reliability
If multiple flexible printed circuit boards are used for display and touch signal connections, then signal transmission is achieved, but the occupied space increases
Solution Approach 1:
The patent combines the connections for display and touch signals into a single flexible printed circuit board. By sharing the bonding area and using a unified signal transmission path, the patent reduces the number of flexible printed circuit boards from two to one, thereby minimizing the occupied space while maintaining reliable signal transmission for both functions.
Data Source
AI summary
The disclosure discloses a touch OLED display panel, including an array substrate, a light emitting structure layer, and a thin film encapsulation layer encapsulating the light emitting structure layer on the array substrate and including a sidewall located around the light emitting structure; a touch structure layer is disposed on a first surface of the thin film encapsulation layer, and the sidewall includes a first via hole communicating with the touch structure layer and the array substrate, and the touch OLED display panel further includes a bonding area; the first via hole is configured as a signal wire channel, and a touch signal wire in the touch structure layer and a display signal wire in the array substrate are simultaneously connected by the guidance of the first via hole to the bonding area and shares the bonding area. The disclosure also discloses a display apparatus including the OLED display panel.