Touch Electrode Mesh Layout to Reduce Display Panel Dark Lines
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Solution Overview
Problem
Display panels with touch functions suffer from reliability issues due to the appearance of mesh-shaped dark lines when not displaying images under ambient light, caused by high reflectivity of metal touch electrode layers and the need for partition openings that increase resistance.
Innovation Solution
Incorporating sub-mains with auxiliary partition openings in mesh holes of the touch electrode layer, ensuring uniform distribution and matching reflectivity with existing partition openings, while maintaining the same material and layer arrangement as the touch driving and sensing electrodes, thus avoiding additional resistance increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If partition openings are added to the touch electrode layer to reduce reflectivity, then the visibility of dark lines under ambient light is reduced, but the electrical resistance of the touch electrode layer increases
Solution Approach 1:
The touch electrode layer is segmented into multiple sub-electrodes within each mesh hole, with sub-mains dividing the mesh holes into first and second regions. This segmentation allows selective placement of partition openings in specific regions (first region) while maintaining continuous conductive paths in other regions (second region), thereby reducing dark line visibility without significantly increasing overall electrical resistance.
Solution Approach 2:
Partition openings are strategically placed only in the first region of mesh holes where they are most effective at reducing dark line visibility, while the second region maintains continuous conductive paths. This local differentiation optimizes the balance between aesthetic quality (reduced dark lines) and electrical performance (maintained touch sensitivity).
2Reliability
If metal touch electrode layers are used to provide touch functionality, then touch sensitivity is achieved, but high reflectivity causes mesh-shaped dark lines to appear under ambient light
Solution Approach 1:
Each mesh hole is divided into first and second regions by sub-mains, allowing selective application of partition openings in the first region. This segmentation enables the touch electrode layer to maintain its metal composition for touch sensitivity while introducing non-reflective partition openings in strategic locations to reduce overall reflectivity and dark line visibility.
Solution Approach 2:
Partition openings act as intermediary elements that interrupt the continuous metal path in specific regions, creating a hybrid structure where metal provides touch functionality while the partition openings reduce reflectivity. The sub-mains serve as intermediaries to organize these partition openings in a controlled manner.
Data Source
AI summary
Disclosed is a display panel, including a driver backplane, a plurality of light-emitting devices, an encapsulation layer, a touch electrode layer, and sub-mains. The touch electrode layer is provided with a plurality of mesh holes in one-to-one correspondence with the plurality of light-emitting devices, and an orthographic projection of each of the plurality of light-emitting devices on the driver backplane falls into an orthographic projection of a corresponding mesh hole on the driver backplane; and the sub-main is distributed in the mesh hole, wherein at least one end of the sub-main is connected to an inner wall of the mesh hole, and the sub-main is provided with an auxiliary partition opening.