Shielded Sensing-Line Routing for Compact Display Wiring
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Solution Overview
Problem
Existing display devices face challenges in minimizing dead space while optimizing the arrangement of sensing lines, leading to limited sensing regions and potential interference between sensing and data lines.
Innovation Solution
The display device incorporates a novel arrangement of sensing lines, where they are positioned above or under data lines in specific regions, with shielding patterns and connection lines that minimize interference and expand the sensing region without increasing dead space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the sensing line is arranged in the wiring region, then the sensing region is expanded, but interference between the sensing line and data line increases
Solution Approach 1:
A shielding pattern is introduced as an intermediary element between the sensing line and data line. The shielding pattern includes a first portion positioned between the sensing line and data line in a first region, and a second portion positioned between the sensing line and data line in a second region. This intermediary structure effectively blocks electromagnetic interference while allowing the sensing line to be routed through the wiring region, thus expanding the sensing region without compromising signal integrity.
2Area of stationary object
If the sensing line is positioned above the data line, then the sensing region is expanded, but the complexity of the wiring structure increases
Solution Approach 1:
The shielding pattern is segmented into multiple portions: a first shielding pattern portion positioned in a first region between the sensing line and data line, and a second shielding pattern portion positioned in a second region. This segmentation allows the shielding function to be distributed across different areas, reducing the complexity of any single location while collectively providing comprehensive interference protection and enabling expanded sensing region coverage.
3Reliability
If the sensing line is arranged to minimize interference, then the reliability of sensing is improved, but the sensing region is reduced
Solution Approach 1:
The solution transitions from a two-dimensional planar arrangement to a three-dimensional layered structure. The shielding pattern is positioned at different vertical levels between the sensing line and data line, creating a multi-layered configuration. This dimensional change allows the sensing line to extend further across the wiring region without increasing horizontal interference, thereby expanding the sensing region while maintaining high sensing reliability through effective electromagnetic shielding.
Data Source
AI summary
A display device includes: a base layer; a circuit layer including: a buffer layer on the base layer; inorganic insulating layers on the buffer layer; organic insulating layers on the inorganic insulating layers; and conductive patterns; an element layer on the circuit layer, and including a sensing element and a light-emitting element in an active region; a data line electrically connected to the light-emitting element, and extending from the active region to a wiring region; and a sensing line electrically connected to the sensing element. The wiring region includes: a first region adjacent to the active region; a second region adjacent to the pad region; and an open region between the first region and the second region. The sensing line is located above the data line in the first region and the second region, and the sensing line is located under the data line in the open region.