Display Panel Isolation Structure for Crosstalk Reduction
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Solution Overview
Problem
Current OLED display products suffer from operational performance issues due to crosstalk between signals in the array substrate and touch signals in the display panel.
Innovation Solution
A display panel design featuring an array substrate, an isolation structure with light-transmitting and isolation openings, a light-emitting layer, and a touch layer with a touch electrode and a dummy electrode, where the touch electrode is insulated from the dummy electrode, and the dummy electrode is positioned in a non-touch area corresponding to light-transmitting openings to prevent signal crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the array substrate and touch layer are integrated in the display panel, then the display function and touch function are combined in one device, but signal crosstalk occurs between the array substrate signals and touch signals
Solution Approach 1:
The display panel is divided into a first area for display function and a second area for touch function. The array substrate includes first signal lines in the first area and second signal lines in the second area, which are spatially separated to prevent signal crosstalk while maintaining functional integration.
Solution Approach 2:
Different regions of the array substrate are assigned different properties: the first area contains light-emitting units and first signal lines for display, while the second area contains second signal lines for touch sensing. This local differentiation allows each region to optimize its function without interfering with the other.
2Measurement precision
If the touch electrode is made large to improve touch sensitivity, then the touch detection area increases, but the light transmittance of the display panel decreases
Solution Approach 1:
The touch layer is segmented into a touch electrode in the second area and a dummy electrode in the first area. The touch electrode is positioned where it does not block display light, while the dummy electrode provides extended touch detection capability without compromising light transmittance in the display area.
Solution Approach 2:
The dummy electrode acts as an intermediary that extends the touch detection function into the first area without blocking light. It provides touch sensing capability in regions where light transmission is critical, thereby mediating between the need for large touch detection area and high light transmittance.
3Manufacturing precision
If the isolation structure is made dense to improve light emission control, then the display quality improves, but the manufacturing complexity increases
Solution Approach 1:
The isolation structure is segmented into isolation openings in the first area and light-transmitting openings in the second area. This segmentation allows the isolation structure to fulfill multiple functions: controlling light emission in the display area while maintaining light transmission in the touch area, thereby reducing overall structural complexity.
Solution Approach 2:
The isolation structure serves multiple functions simultaneously: it acts as a barrier for light control in the first area, provides structural support, and creates pathways for light transmission in the second area. This multi-functionality reduces the need for separate structures, simplifying manufacturing.
Data Source
AI summary
The present application discloses a display panel and a display apparatus. The display panel has a first area and a second area. The display panel includes an array substrate, an isolation structure provided with light-transmitting openings and isolation openings, the isolation openings being located at least in the first area, and the light-transmitting openings being located in the second area, a light-emitting layer including light-emitting units arranged in the isolation openings, and a touch layer having a touch area and a non-touch area, the touch layer including a touch electrode arranged in the touch area and a dummy electrode arranged in the non-touch area, the touch electrode being insulated from the dummy electrode, at least part of the touch area being located in the first area, and at least part of the non-touch area being located in the second area.