Display Panel Touch-Layer Layout for Reduced Wire Fracture Risk
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing Flexible Multi-Layer On Cell (FMLOC) technology in AMOLED display screens faces issues with large steps at layer changing positions, leading to potential disconnection of touch signal wires due to the thick inorganic insulating and buffer layers, which affects touch performance.
Innovation Solution
A display panel design with a touch layer configuration that includes non-overlapping orthographic projections of electrode and insulating layers, separated by specific distances and angles, to minimize step formation and ensure consistent layer transitions, thereby preventing wire fractures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thick inorganic insulating and buffer layers are used in FMLOC technology, then electrical insulation and structural support are improved, but wire fracture risk increases due to large steps at layer changing positions
Solution Approach 1:
The patent transitions from a vertical stacking approach (where thick layers create large steps) to a planar integration approach (FMLOC), where touch electrode layers are manufactured on the same cell structure as the display elements. This dimensional change eliminates the need for thick insulating layers to bridge vertical gaps, thereby preventing wire fractures while maintaining electrical insulation through in-plane separation of conductive elements.
Solution Approach 2:
The patent merges the touch sensor functionality and display element structure into a single integrated cell structure. By combining the touch electrode layers with the display substrate in the same manufacturing process and physical structure, the design eliminates the need for separate thick insulating and buffer layers that would be required if touch and display components were stacked vertically, thus preventing wire fractures while maintaining necessary electrical insulation.
2Adaptability or versatility
If externally attached touch panel is used, then touch function is achieved, but screen thickness and bezel width increase due to fitting tolerance
Solution Approach 1:
The patent combines the touch sensor structure and display element structure into a single integrated cell structure, eliminating the need for a separate externally attached touch panel. This merging allows the touch functionality to be achieved within the same thin substrate as the display elements, thereby reducing overall screen thickness and eliminating fitting tolerances that would increase bezel width.
Solution Approach 2:
The integrated cell structure serves multiple functions simultaneously: it acts as both the display element substrate and the touch sensor structure. The same thin substrate provides both light emission/display functionality and touch sensing capability, eliminating the need for additional thickness from a separate touch panel layer while maintaining full touch functionality.
Data Source
AI summary
Provided is a display panel, including a display substrate including a display region and a bonding region; and a touch layer on the display substrate. The bonding region includes a bending region and a first non-bending region adjacent to each other. The display substrate further includes a first conductive layer at least located in the bending region. The touch layer is in the first non-bending region; the touch layer has a first boundary in an adjacent area between the bending region and the first non-bending region, and includes sequentially disposed a first electrode layer, an insulating layer and a second electrode layer. Edges of the second electrode layer and the first conductive layer overlap, orthographic projections of first boundaries of the second electrode layer, the first electrode layer and the insulating layer on the display substrate do not overlap, and are sequentially located away from the bending region.