Display Detection-Line Bridges for Voltage Monitoring
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Solution Overview
Problem
Medium and large display devices experience a voltage difference between the lower and upper ends, necessitating a design to compensate for this disparity to ensure uniform driving voltage distribution to pixels.
Innovation Solution
A display device design featuring a substrate with insulating layers, power lines, detection lines, and dam patterns to provide uniform driving voltage to pixels, utilizing extension and bridge lines with specific material compositions and laminated dam patterns to manage voltage levels and enhance connectivity.
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 first direction and multiple second power lines extending in the second direction, creating a grid-like structure that divides the large display area into smaller voltage distribution zones, reducing the voltage difference across each segment
Solution Approach 2:
The patent introduces a second direction (transverse direction) in addition to the first direction (longitudinal direction) for power line extension. Second power lines connect to first power lines at intersection points, creating a two-dimensional power distribution network that reduces voltage drop by providing multiple parallel paths
2Measurement precision
If detection lines are added to monitor voltage, then voltage measurement capability improves, but device complexity increases
Solution Approach 1:
The intersection points of first and second power lines serve dual functions: they are connection points for the power distribution network and simultaneously serve as detection points for voltage monitoring, eliminating the need for separate detection lines and reducing overall system complexity
Solution Approach 2:
The power line structure itself provides the detection function through its intersection points, where voltage can be monitored without requiring additional dedicated detection infrastructure. The existing structural elements serve multiple purposes including power delivery and voltage sensing
Data Source
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AI summary
Disclosed is a display device including a detection line (EL-T) disposed in a non-display area, first power lines (PL1) connected to pixels to provide a first driving voltage, and a second power line (PL2) including first lines (PL2-1 to PL2-e) and a second line (PL2-S) that provides a second driving voltage to the pixels, wherein the detection line includes extension lines (EL-T) spaced apart from each other by the display area , a bridge line (EL-B) connected to the first power lines, and connection lines (EL-C) 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.