Sub-Pixel Power Line Layout for Higher-Resolution Displays
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Solution Overview
Problem
Current display devices face challenges in efficiently managing power lines and alignment electrodes for sub-pixels, leading to increased complexity and potential misalignment of light emitting elements, which affects the display's yield and resolution.
Innovation Solution
A display device design featuring pixel rows with unified power line disposition, where vertical power lines transmit different powers and are connected to horizontal power lines through contact holes, minimizing electric field deviations and simplifying the pixel circuit layer layout, resulting in reduced metal line integration and improved resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power lines are used for each sub-pixel, then each sub-pixel can receive appropriate power, but the number of lines increases and layout complexity increases
Solution Approach 1:
The patent merges the power line layouts of multiple sub-pixels into a unified design. Specifically, adjacent sub-pixels share common power line routes and contact hole positions, reducing the total number of lines while ensuring each sub-pixel receives appropriate power through the shared infrastructure.
Solution Approach 2:
The power lines are designed to serve multiple sub-pixels simultaneously. A single power line can supply power to multiple sub-pixels through strategically positioned contact holes, making the power distribution system multi-functional and reducing overall complexity.
2Adaptability or versatility
If complex power line arrangements are used to supply different powers to sub-pixels, then power distribution flexibility improves, but manufacturing precision requirements increase
Solution Approach 1:
The power distribution system is segmented into modular units where each sub-pixel or group of sub-pixels has a defined power supply zone. This segmentation allows for standardized manufacturing processes while maintaining the ability to supply different powers to different regions through controlled contact hole placement.
Solution Approach 2:
The patent employs equipotential design principles by ensuring that contact holes are positioned at standardized intervals and locations relative to alignment electrodes. This creates uniform electrical potential zones that simplify manufacturing alignment while still allowing different power levels to be supplied to different sub-pixel regions.
3Adaptability or versatility
If more power lines are added to supply different powers, then power control capability improves, but the number of metal lines increases
Solution Approach 1:
The patent utilizes the vertical dimension by stacking multiple conductive layers to provide different power lines. Instead of adding more lines in the horizontal plane which would increase the number of metal lines, the solution routes different power lines through different vertical layers, maintaining a compact horizontal layout while achieving multi-power supply capability.
Data Source
AI summary
A display device includes a pixel including a first sub-pixel to third sub-pixels, each arranged in a first direction and emitting light of a color, a first to third vertical power lines, each extending in a second direction different from the first direction, overlapping the first to third sub-pixels, respectively, and transmitting first to third powers, respectively, a first to third horizontal power lines, each extending in the first direction and electrically connected to the first to third vertical power lines through a contact hole, respectively. Voltages of the first power, the second power, and the third power are different from each other.