Staggered Output Terminals for High-Resolution Display Devices
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Solution Overview
Problem
As the number of pixels in display devices increases to achieve high-definition images, the area and size of the display device also increase due to the increased number of signal lines. Additionally, the efficient arrangement of output terminals and wirings connected to IC chips becomes challenging, particularly in head-mounted displays that require higher resolution.
Innovation Solution
A display device configuration is introduced where the output terminals are arranged in a staggered manner, with each terminal composed of multiple conductive layers stacked in order. This configuration allows for efficient arrangement of signal lines by reducing wiring density and enabling larger widths and spacings of the output terminals and wirings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pixels is increased to achieve high-definition images, then the image quality is improved, but the area and size of the display device increase due to the increased number of signal lines
Solution Approach 1:
The patent transitions from a planar arrangement of output terminals to a three-dimensional stacked configuration using multiple conductive layers. This vertical stacking allows signal lines to be routed through different layers, reducing the horizontal area required for the same number of connections and enabling high-definition displays without proportionally increasing device size.
Solution Approach 2:
The output terminals are divided into multiple conductive layers (first through sixth conductive layers), with each layer containing specific terminals. This segmentation allows independent routing and arrangement of signal lines in different layers, improving space utilization and reducing the overall area required for signal line connections.
2Measurement precision
If the number of signal lines is increased to support more pixels, then the image resolution is improved, but the wiring density increases and manufacturing complexity increases
Solution Approach 1:
By arranging output terminals across multiple stacked conductive layers, the patent provides additional spatial dimensions for routing signal lines. This reduces the complexity of wiring arrangement in the planar direction and simplifies the connection between IC chips and display elements while supporting high resolution.
Solution Approach 2:
The multiple conductive layers serve dual purposes: they provide separate routing paths for different signal lines and also function as structural support and electrical isolation layers. This multi-functionality reduces the need for additional dedicated structures, simplifying the overall wiring arrangement.
3Reliability
If output terminals are arranged in a staggered manner with multiple conductive layers, then the wiring density is reduced and connection reliability is improved, but the manufacturing process complexity increases
Solution Approach 1:
The staggered arrangement across multiple conductive layers creates vertical separation between adjacent terminals, reducing wiring density and improving connection reliability by minimizing interference and stress concentration. The multi-layer structure provides redundant routing paths that enhance connection reliability.
Solution Approach 2:
The output terminals are arranged in an asymmetric staggered pattern rather than a uniform grid, with different terminals positioned at different horizontal offsets across layers. This asymmetric arrangement optimizes space utilization, reduces wiring interference, and improves connection reliability while maintaining manufacturability.
Data Source
AI summary
A display device includes a display region arranged with a plurality of pixels on an insulating surface, and a terminal region with a plurality of output terminals electrically connected to the plurality of pixels in a peripheral region surrounding the display region, wherein a first output terminal and a second output terminal of the plurality of output terminals are staggered, the first output terminal includes a first conductive layer, a second conductive layer, and a third conductive layer electrically connected to each other, the second output terminal includes a fourth conductive layer, a fifth conductive layer, and a sixth conductive layer electrically connected to each other, the second conductive layer has a first region extending toward the display region and functioning as a first wiring, and the fourth conductive layer has a second region extending toward the display region and functioning as a second wiring.