Pixel Driver Line Layout for Higher-Resolution Displays
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Solution Overview
Problem
The challenge of increasing the resolution of display devices is limited by the width of light-emitting pixel drivers, which makes it difficult to reduce their size.
Innovation Solution
The display device incorporates a circuit layer with light-emitting pixel drivers arranged in a specific configuration, including signal and constant voltage transmission lines, and transistors to optimize the layout and reduce the width of each pixel driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of transistors in light-emitting pixel drivers is maintained to ensure functionality, then the reliability is improved, but the width of pixel drivers increases, limiting the resolution improvement
Solution Approach 1:
The signal transmission line is configured to extend in both the first direction (horizontal) and second direction (vertical), creating a two-dimensional routing pattern. This allows the transmission line to serve multiple adjacent pixel drivers in both horizontal and vertical directions, effectively utilizing spatial dimensions to reduce the width requirement of individual pixel drivers while maintaining all necessary transistor components for reliable operation
2Measurement precision
If the resolution of the display device is increased, then the measurement precision is improved, but the area occupied by pixel drivers increases, limiting further resolution enhancement
Solution Approach 1:
Multiple signal transmission lines are merged into a single transmission line that serves multiple pixel drivers. The first signal transmission line transmits signals to pixel drivers in both the first and second directions, consolidating what would traditionally require separate dedicated transmission lines for each pixel driver. This merging approach reduces the total area occupied by transmission infrastructure, allowing higher pixel density and improved resolution without proportionally increasing the area consumed by driver circuits
Data Source
AI summary
A display device includes a substrate; a circuit layer; and an element layer. The circuit layer includes light-emitting pixel drivers arranged side by side in a first direction and a second direction intersecting each other; and a first signal transmission line transmitting a first signal to a first light-emitting pixel driver and a second light-emitting pixel driver, which neighbor each other in the second direction, among the light-emitting pixel drivers. The first signal transmission line includes a first main portion overlapping the first light-emitting pixel driver and extending in the first direction; a first sub-extension portion electrically connected to the first main portion and extending in the second direction; and a second sub-extension portion electrically connected to the first sub-extension portion, extending in the first direction, and overlapping the second light-emitting pixel driver.