Input Sensing Unit Mesh Lines and Contact Holes for Display Visibility
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Solution Overview
Problem
Existing electronic devices face challenges in improving visibility and reliability, particularly in the design of input sensing units for detecting external inputs while maintaining image display quality.
Innovation Solution
The electronic device incorporates a display unit with an input sensing unit featuring a sensing insulating layer, conductive patterns, and reflection compensation patterns, where the sensing patterns and conductive patterns are connected through contact holes, and the input sensing unit includes mesh lines and overlapping contact holes to enhance touch sensing capabilities and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the input sensing unit uses a conventional design with sensing patterns directly on the display unit, then the touch sensing capability is achieved, but the visibility and image display quality deteriorate due to interference patterns and reduced contrast
Solution Approach 1:
The patent introduces a sensing insulating layer as an intermediary between the display unit and the sensing patterns. This intermediate layer reduces the direct optical interference between the sensing patterns and the display, thereby improving visibility while maintaining touch sensing capability. The insulating layer acts as a mediator that decouples the optical and electrical functions.
Solution Approach 2:
The patent applies different properties to different regions: the sensing insulating layer is positioned specifically where it can reduce optical interference without compromising touch sensing areas. The contact holes are strategically located to maintain electrical connectivity while minimizing optical impact. This localized application of different properties resolves the contradiction between sensing performance and display quality.
2Reliability
If the sensing insulating layer includes multiple contact holes for connecting sensing patterns, then the electrical connectivity and reliability are improved, but the manufacturing complexity increases
Solution Approach 1:
The patent divides the contact structure into multiple discrete contact holes within the sensing insulating layer, allowing independent formation and control of each contact. This segmentation enables better electrical connectivity through multiple pathways while facilitating simpler manufacturing processes compared to forming complex through-holes in a single thick layer.
Solution Approach 2:
The patent extends the contact structure into the vertical dimension by forming contact holes through the sensing insulating layer thickness. This dimensional approach allows electrical connectivity to be established through the insulating barrier without requiring lateral complexity, resolving the contradiction between reliability and manufacturing ease.
3Measurement precision
If the mesh lines are disposed on the second insulating layer to improve touch sensing, then the sensing accuracy is enhanced, but the structural complexity of the input sensing unit increases
Solution Approach 1:
The second insulating layer serves multiple functions: it provides electrical insulation, supports the mesh line sensing patterns, and facilitates contact hole formation for electrical connectivity. By making this single layer multi-functional, the patent achieves enhanced sensing accuracy without proportionally increasing structural complexity.
Solution Approach 2:
The patent merges the functions of insulation and sensing pattern support into the same second insulating layer. This consolidation reduces the total number of separate components and layers needed, thereby enhancing sensing accuracy while limiting the increase in structural complexity.
Data Source
AI summary
An electronic device including a display unit including light-emitting areas providing an image and non-light-emitting areas adjacent to the light-emitting areas, and an input sensing unit disposed on the display unit and including: a first insulating layer disposed on the display unit; a first conductive layer disposed on the first insulating layer and including first conductive patterns; a second insulating layer including first contact holes exposing the first conductive patterns and second contact holes exposing the first insulating layer overlapping each other, and disposed on the first insulating layer and covering the first conductive layer; and a second conductive layer formed of mesh lines that cross each other and define mesh openings overlapping the corresponding light-emitting areas, in which each of the first contact holes and the second contact holes overlaps intersection portions of the mesh lines.