Scan Driver Segmentation for High-Resolution Displays
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Solution Overview
Problem
High-resolution display devices face challenges in integrating a scan driver with a larger size than the small pixels, requiring efficient design to minimize area occupation while maintaining functionality.
Innovation Solution
The display device incorporates a substrate with a scan driver in the non-display area, featuring multiple stages that output scan signals to pixels, with clock and voltage lines strategically arranged to cross stages, and a signal controller providing control signals, allowing for efficient integration and reduced area occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the scan driver is designed with multiple stages to support high-resolution displays, then the display resolution is improved, but the area occupied by the scan driver increases
Solution Approach 1:
The scan driver is divided into multiple stages, where each stage is responsible for driving a specific group of pixels. This segmentation allows the scan driver to support high-resolution displays by distributing the driving function across multiple smaller units, thereby managing the overall area occupation more effectively while maintaining the capability to drive a large number of pixels with high resolution.
2Area of stationary object
If clock lines and voltage lines are arranged to cross stages, then the area occupation is reduced, but the signal interference may increase
Solution Approach 1:
Clock lines and voltage lines are arranged to cross stages in a vertical or perpendicular direction rather than running parallel to the pixel rows. This dimensional change in line arrangement allows the signal lines to pass through the scan driver structure more efficiently, reducing the horizontal area occupation while minimizing signal interference through proper routing design that avoids sensitive pixel circuit areas.
Data Source
AI summary
A display device includes a substrate that includes a display area for displaying an image and a non-display area surrounding the display area, a plurality of pixels that are disposed in the display area and each include an organic light emitting diode and a pixel circuit portion configured to operate the organic light emitting diode, and a scan driver that is disposed in the non-display area and includes a plurality of stages configured to output scan signals to the plurality of pixels. The plurality of stages may be arranged in n columns, a height of one stage may correspond to a height of n pixels, and n may be an integer of 2 or more.