Display Power Pad Layout to Prevent Bus Line Overlap
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face reliability issues due to component overlap and increased connection members, leading to potential failure and contact issues between power lines and power pads.
Innovation Solution
A display device design with a substrate featuring a display region and non-display region, where power pads receive drive power supply voltages without overlapping with line portions, and bus lines are separated and integrally formed to reduce connection members, minimizing component overlap and preventing contact failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power pads are arranged to receive drive power supply voltages, then power supply function is improved, but component overlap increases leading to reliability issues
Solution Approach 1:
The non-display region is divided into distinct zones: a pad region containing signal pads, a fan-out region containing line portions, and a power pad region containing power pads. This spatial segmentation prevents overlap between different components by assigning each to its own dedicated area, thereby improving reliability while managing device complexity.
2Reliability
If multiple connection members are used to connect power lines to power pads, then electrical connection is improved, but contact failure risk increases
Solution Approach 1:
The bus lines are configured to integrally connect multiple power lines to the power pads, reducing the number of separate connection members needed. This merging approach maintains electrical connection quality while minimizing potential contact failure points, thereby improving contact reliability and reducing device complexity.
3Area of stationary object
If power pads overlap with line portions, then space utilization is improved, but failure risk increases due to component interference
Solution Approach 1:
The power pads are extracted from the general pad region and placed in a dedicated power pad region within the non-display region, separated from the fan-out region containing line portions. This extraction eliminates overlapping between power pads and line portions, preventing component interference and reducing failure risk, while still utilizing the non-display region effectively.
Data Source
AI summary
A display device may include a substrate including a display region and a non-display region, the non-display region including a fan-out region and a pad region, a plurality of pixels in the display region, a pad portion located in the pad region, a line portion located in the fan-out region, a power pad portion located in one region of the non-display region, a first power line located in the display region and connected to the plurality of pixels, a second power line located in the display region, spaced from the first power line, and connected to the plurality of pixels, a first bus line located in the non-display region and connected to the first power line, and a second bus line located in the non-display region and connected to the second power line.