Display Power-Line Segmentation for Uniform Pixel Voltage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Medium and large display devices experience a voltage difference between the lower and upper ends, requiring a design to compensate for this disparity to ensure uniform driving voltage distribution to pixels.
Innovation Solution
A display device design incorporating a substrate with insulating layers, power lines, detection lines, and dam patterns to provide uniform driving voltage, including extension and bridge lines, and dam patterns to manage voltage levels and ensure consistent pixel operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If power lines are extended to cover large display areas, then the display area increases, but voltage difference between upper and lower ends worsens
Solution Approach 1:
The power line system is segmented into multiple first power lines extending in the second direction (intersecting the first direction) and second power lines extending in the first direction. This segmentation creates a grid-like structure that reduces the effective length of individual power lines, thereby minimizing voltage drops and ensuring more uniform voltage distribution across the large display area.
Solution Approach 2:
Different regions of the display device are provided with different power line configurations. The first power lines are disposed in specific directions to address voltage distribution in one dimension, while second power lines are disposed in perpendicular directions to address voltage distribution in the other dimension. This local optimization ensures that each region receives adequate power with minimized voltage difference.
2Reliability
If multiple power lines are added to compensate for voltage difference, then voltage uniformity improves, but device complexity increases
Solution Approach 1:
The first and second power lines are merged into an integrated power distribution network where they intersect and work together. The first power lines extending in the second direction and the second power lines extending in the first direction form a coordinated system that achieves voltage uniformity through their combined effect, rather than requiring separate independent systems.
Solution Approach 2:
The power line structure serves multiple functions simultaneously: the first power lines provide power distribution in one direction while the second power lines provide power distribution in the perpendicular direction. This multi-functional design achieves comprehensive voltage uniformity across the display area without requiring additional separate systems for each direction.
Data Source
AI summary
Disclosed is a display device including a detection line disposed in a non-display area, first power lines connected to pixels to provide a first driving voltage, and a second power line including first lines and a second line that provides a second driving voltage to the pixels, wherein the detection line includes extension lines spaced apart from each other by the display area, a bridge line connected to the first power lines, and connection lines connecting one of the extension lines and an end portion of the bridge line as well as another one of the extension lines and another end portion of the bridge line, and the second power line overlaps the connection lines in a plan view.