Touch Display Panel with Time-Shared Integrated Touch Electrodes
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Solution Overview
Problem
The existing touch display panels, particularly in-cell OLED displays, face challenges in reducing the thickness of stacked layers and preparation costs.
Innovation Solution
A touch display panel design that incorporates isolation structures on a substrate to define isolation openings, where first electrodes of light-emitting units are located, electrically connected to these structures, and controlled by a time-sharing control module to receive touch or power signals in a time division mode, eliminating the need for an additional touch electrode film layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional touch electrode film layer is added to achieve touch function, then touch sensitivity is improved, but the thickness of the touch display panel increases
Solution Approach 1:
The patent merges the touch electrode function with the existing first electrode of the light-emitting unit by electrically connecting them through the isolation structure. This combination eliminates the need for a separate touch electrode film layer, achieving touch sensitivity without increasing panel thickness.
Solution Approach 2:
The first electrode and isolation structure are designed to serve dual functions: as the light-emitting electrode in the OLED structure and as the touch electrode for sensing touch signals. This multi-functionality reduces the overall layer count and thickness of the display panel.
2Adaptability or versatility
If a separate touch electrode film layer is added, then touch function is achieved, but preparation cost increases
Solution Approach 1:
The patent combines the touch electrode function with the existing first electrode structure, eliminating the need for additional touch electrode film deposition processes. This reduces manufacturing steps and preparation costs while maintaining touch functionality.
Solution Approach 2:
The first electrode and isolation structure are designed to perform both display and touch functions simultaneously, reducing the total number of layers that need to be manufactured and assembled, thereby lowering overall preparation costs.
3Reliability
If isolation structures are used to define isolation openings, then adjacent light-emitting units are isolated, but device complexity increases
Solution Approach 1:
The isolation structure is designed to simultaneously provide electrical isolation between adjacent light-emitting units and serve as an electrical connection path for the touch electrode function. This merging of functions reduces the need for additional isolation layers and simplifies the overall structure.
Data Source
AI summary
Disclosed are a touch display panel, a manufacturing method therefor. The touch display panel includes: a substrate, a light-emitting layer, a plurality of isolation structures, and a time-sharing control module. The light-emitting layer is provided on a side of the substrate and includes a plurality of light-emitting units. The light-emitting unit includes a first electrode. The plurality of isolation structures are configured to define a plurality of isolation opening. The light-emitting unit is provided in the isolation opening, and adjacent light-emitting units are isolated by the isolation structure. The first electrode is electrically connected to the isolation structure. The time-sharing control module is configured to control a corresponding isolation structure to receive a touch signal or a power signal in a time division mode. Thus, there is no need to add an additional touch electrode film layer to achieve touch function of the touch display panel.