Flexible Display Touch Insulation Pattern Against Pad Shorting

The patent divides the insulating layer into multiple segments: an interlayered insulating layer and a touch insulating layer with an intaglio pattern. This segmentation allows each layer to perform its specific function - the interlayered insulating layer provides baseline insulation while the touch insulating layer with its patterned structure provides enhanced stress management and delamination prevention during bending operations.

The touch insulating layer features an intaglio pattern that creates local variations in thickness and structure. The pattern includes recessed regions that locally accommodate stress during bending, while other regions maintain standard insulation properties. This local quality variation allows the layer to respond differently to stress in different areas, preventing uniform delamination.

The intaglio pattern introduces curved, non-planar features into the touch insulating layer. The recessed regions create a three-dimensional curved surface that allows the layer to flex and accommodate bending stresses without delaminating. This curvature enables the layer to maintain structural integrity through deformation rather than requiring increased thickness.

The patent transitions from a two-dimensional planar insulating layer to a three-dimensional structured layer with the intaglio pattern. By adding the vertical dimension through recessed regions, the layer gains the ability to accommodate bending stresses that a flat layer of any thickness would resist, thereby improving delamination resistance without simply increasing overall thickness.