Multi-Layer Display Line Layout Around Optical Holes
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Solution Overview
Problem
In display devices with thin bezels, the path for fan-out lines may be insufficient, leading to potential interference between data and constant voltage lines, particularly near optical holes.
Innovation Solution
The display device incorporates sub constant voltage and data connection lines in multiple conductive layers, with the sub data connection line disposed in three or more different conductive layers and the sub constant voltage connection line in a distinct conductive layer, insulated from the sub data connection line, to minimize interference near optical holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the non-display area size is reduced to achieve a thin bezel, then the bezel width is reduced, but the path for fan-out lines becomes insufficient causing interference between data and constant voltage lines
Solution Approach 1:
The patent applies dimensionality change by transitioning from a single-layer connection structure to a multi-layer conductive structure. The sub data connection line is disposed in three or more different conductive layers, while the sub constant voltage connection line is disposed in a distinct conductive layer. This vertical layering separates the paths of data and constant voltage lines in the thickness direction, eliminating interference while maintaining a compact planar footprint that enables thin bezel design.
Solution Approach 2:
The patent segments the connection lines into multiple sub-lines distributed across different conductive layers. The data connection is divided into sub data connection lines in different layers, and the constant voltage connection is separated into sub constant voltage connection lines in distinct layers. This segmentation allows each line to be routed independently through specific layers, avoiding crossing and interference while achieving the required connectivity.
2Device complexity
If multiple connection lines are routed in the same plane to reduce bezel width, then the device complexity is reduced, but interference between data and constant voltage lines increases
Solution Approach 1:
The patent resolves the contradiction by adding the vertical dimension through multiple conductive layers. Instead of complicating the planar routing to avoid interference, the solution routes data and constant voltage lines through different layers in the thickness direction. The sub data connection line uses three or more conductive layers while the sub constant voltage connection line uses a separate conductive layer, achieving spatial separation without increasing planar complexity.
Solution Approach 2:
The patent introduces insulating layers as intermediaries between the conductive layers containing data and constant voltage lines. These insulating layers act as mediators that electrically isolate the different signal types while allowing them to coexist in close proximity. This intermediary structure enables multiple connection lines to be routed near each other in the planar view without causing interference, maintaining simplicity while ensuring electrical isolation.
Data Source
AI summary
A display device includes a substrate in which an active area and a non-active area surrounded by the active area are defined, where an optical hole is defined in the non-active area through the substrate; first and second sub constant voltage lines extended from the non-active area in opposite directions; a sub constant voltage connection line connecting the first and second sub constant voltage lines in the non-active area; first and second sub data lines extended from the non-active area in the opposite directions; and a sub data connection line connecting the first and second sub data lines in the non-active area. The sub data connection line is disposed in three or more different conductive layers, and the sub constant voltage connection line is disposed in a different conductive layer from the sub data connection line and insulated from the sub data connection line.