AMOLED Panel Fan-Out Transposition Layout for Narrow Lower Borders
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Solution Overview
Problem
High Frame Rate AMOLED display panels in the related art cannot achieve extremely narrow lower borders and fail to meet operating requirements.
Innovation Solution
The display panel design includes multiple pixel driving circuits arranged in an array with first and second pixel driving circuits distributed at intervals, utilizing fan-out transposition lines and data signal lines in different metal layers to connect signal lines from side areas to the middle area, reducing the lower border size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If data signal lines are directly connected to pixel driving circuits in the middle area, then signal transmission is simplified, but the lower border width cannot be reduced to extremely narrow levels
Solution Approach 1:
The patent introduces fan-out transposition lines in a first metal layer to route data signals from side areas to the middle area, and data fan-out lines in a second metal layer to connect to pixel driving circuits. This multi-layer routing approach utilizes the vertical dimension (different metal layers) to achieve extremely narrow lower border while managing the complexity through systematic organization of signal paths.
Solution Approach 2:
The signal transmission path is segmented into distinct functional segments: data signal lines in the middle area, fan-out transposition lines in the first metal layer, and data fan-out lines in the second metal layer. This segmentation allows each component to perform a specific routing function, enabling the lower border to be narrowed by distributing the routing task across multiple segments rather than requiring a single complex path.
2Reliability
If multiple data signal lines are arranged on both sides of the pixel column, then signal distribution is improved, but the routing path length increases
Solution Approach 1:
The patent uses fan-out transposition lines in the first metal layer to create a vertical routing path that brings data signals from the side areas up to the middle area where the pixel driving circuits are located. This dimensional transition allows the signal lines to be arranged on both sides of the pixel column while maintaining manageable path length through the layered structure.
Solution Approach 2:
The fan-out transposition lines act as an intermediary element between the data signal lines and the pixel driving circuits. These transposition lines facilitate the connection by providing a dedicated routing path that bridges the gap between the side area signal sources and the middle area pixel circuits, enabling reliable signal distribution without excessive path length.
Data Source
AI summary
A display panel includes a base substrate, a first metal layer, and a second metal layer. The first metal layer is located on a side of the base substrate. The first metal layer includes a plurality of fan-out transposition lines. The second metal layer is located on a side of the first metal layer facing away from the base substrate. The second metal layer includes a plurality of data signal lines and a plurality of data fan-out lines. At least some of the data signal lines distant from a middle area of the display panel are connected to the fan-out transposition lines by means of via holes, and the fan-out transposition lines are further connected to the data fan-out lines proximate to the middle area of the display panel by means of via holes.