OLED Pixel Layout With Staggered Signal Lines to Reduce Dead Space
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Solution Overview
Problem
Existing organic light emitting display devices face challenges in efficiently managing dead space and signal line distribution due to the mounting of drivers on a panel with pixels, leading to inefficiencies in light emission control and pixel arrangement.
Innovation Solution
The display device incorporates a unique arrangement of signal lines and driver stages, where first and second pixel areas have different surface areas and pixel densities, with specific driver stages supplying signals to corresponding signal lines in a manner that minimizes dead space by aligning driver stages along curved or diagonal forms, allowing for efficient light emission control and reduced unused space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If drivers are mounted onto a panel that includes pixels, then light emission control is achieved, but dead space is created
Solution Approach 1:
The display panel is divided into first and second pixel areas with different pixel arrangements. The first pixel area has pixels arranged in a regular grid pattern, while the second pixel area has pixels arranged in a staggered pattern. This segmentation allows different regions to serve different functions, with the second pixel area specifically designed to reduce dead space while maintaining light emission control capability.
Solution Approach 2:
The patent employs asymmetric pixel arrangement where the second pixel area uses a staggered pattern rather than a regular grid. This asymmetric arrangement in the second pixel area reduces dead space by optimizing the spatial distribution of pixels and driver stages, allowing for more efficient use of the panel area while maintaining proper signal line distribution.
2Device complexity
If driver stages are arranged in traditional configurations, then signal supply is simplified, but dead space increases
Solution Approach 1:
The driver stages are arranged in a two-dimensional configuration that spans across the panel, with first driver stages positioned in the first pixel area and second driver stages positioned in the second pixel area. This spatial distribution across different dimensions allows for optimized signal supply while minimizing dead space by utilizing the available area more efficiently.
Solution Approach 2:
Different regions of the panel have different driver stage arrangements tailored to local requirements. The first pixel area has driver stages configured for regular grid pixel connections, while the second pixel area has driver stages configured for staggered pixel connections. This local optimization allows each region to have the appropriate complexity level for its specific pixel arrangement, reducing overall dead space.
3Ease of manufacture
If uniform pixel arrangement is used across the panel, then manufacturing is simplified, but space utilization is reduced
Solution Approach 1:
The display panel is segmented into two distinct pixel areas with different arrangement patterns. The first pixel area uses a uniform regular grid arrangement that is simple to manufacture, while the second pixel area uses a staggered arrangement that optimizes space utilization. This segmentation allows the majority of the panel to maintain manufacturing simplicity while specific regions achieve improved space efficiency.
Solution Approach 2:
Different pixel arrangement patterns are applied to different local regions of the panel based on their specific requirements. The first pixel area maintains uniform arrangement for manufacturing simplicity, while the second pixel area employs staggered arrangement for improved space utilization. This local differentiation resolves the contradiction by allowing each region to optimize for its primary goal.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This arrangement enhances the efficiency of light emission control, reduces dead space, and allows for a more compact and effective organization of driver stages, improving the overall performance and manufacturing reliability of the display device.
Implementation Method 1
electrons injected from one electrode recombine with holes injected from the other electrode in the organic light emitting layer. The recombination of the holes and electrodes forms excitons. Light is emitted when the excitons transition to a stable state.
Data Source
AI summary
A display device includes first pixels in a first pixel area, and second pixels in a second pixel area. The first pixels are electrically connected to first signal lines, second signal lines, and data lines. The second pixels are electrically connected to third signal lines, fourth signal lines, and the data lines. The fourth signal lines include a first conductive line crossing at least one of the third signal lines, and a second conductive line that does not cross any of the third signal lines. The first conductive line is not in contact with the third signal lines.