Display Panel Grid Electrodes with Grounding for Narrow Borders
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing OLED-based touch structures face challenges in achieving lightweight, flexible, and narrow border designs while maintaining effective signal transmission and touch functionality, particularly in flexible folding displays.
Innovation Solution
A display panel design incorporating a display substrate with sub-pixels and a touch panel featuring touch electrodes with grid patterns enclosed by metal wires, where the orthographic projections of emitting and non-emitting regions are strategically arranged, and grounding wires form branched structures with auxiliary grounding wires, along with dummy line segments and specific grid patterns, to optimize signal routing and touch performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a flexible touch substrate is arranged on the encapsulation layer to achieve lightweight and foldable design, then the device becomes flexible and lightweight, but the border width increases and signal interference occurs
Solution Approach 1:
The patent transitions from conventional wide-border flexible touch structures to a narrow-border design by reconfiguring the electrode layout and signal transmission paths in the vertical dimension, allowing the touch substrate to extend closer to the display edges while maintaining structural integrity and reducing overall device width
Solution Approach 2:
The patent introduces a grounding wire structure as an intermediary element that mediates between the touch electrodes and the display substrate, providing electromagnetic shielding and signal reference that enables narrow border design while preventing signal interference in the flexible touch display system
2Length of stationary object
If the touch electrode extends close to the display edge to reduce border width, then the border becomes narrower, but signal interference and touch sensitivity issues occur
Solution Approach 1:
The grounding wire acts as an intermediary shielding structure positioned between the touch electrode and external interference sources, providing electromagnetic protection and stable signal reference that enables the touch electrode to extend to narrow borders without compromising signal transmission reliability
Solution Approach 2:
The patent applies preliminary electromagnetic shielding through the grounding wire structure before signal interference can occur, pre-establishing a reference potential and protective field that prevents noise from affecting the touch electrode signals at the narrow border regions
3Reliability
If the grounding wire is placed close to the touch electrode to reduce interference, then signal integrity improves, but the available space for other components decreases
Solution Approach 1:
The grounding wire structure implements local electromagnetic shielding only in the specific regions where touch electrodes are positioned, providing targeted interference protection while leaving other areas of the display substrate available for component arrangement, thus optimizing both signal integrity and space utilization
Data Source
AI summary
Provided are a display panel, a preparation method thereof, and a display device. The display panel includes a display substrate and a touch panel including multiple touch electrodes, At least one of which includes multiple grid patterns enclosed by metal wires. At least one grid pattern includes a first edge, second edge, third edge and fourth edge that form a ring. The first edge and the third edge extend in a second direction. The second edge and the fourth edge extend in a first direction. A shape of the grid pattern includes a first curved ring, a second curved ring, a third curved ring, or a fourth curved ring. A first edge and third edge of the first curved ring are curves curved towards a direction opposite to the first direction. A first edge and third edge of the second curved ring are curves curved towards the first direction.