Display Panel Grid Power Lines for Screen-to-Body Ratio
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Solution Overview
Problem
Existing display panels using organic light-emitting diodes suffer from high power consumption and low screen-to-body ratio, which hinders resolution improvement.
Innovation Solution
A display panel design with a driving backplane that includes a substrate, transistor layer, and conductive layers, featuring a network of power and conductive lines connected through contact holes arranged in a specific pattern to optimize space utilization and reduce voltage drop, combined with a touch layer to enhance uniformity and reduce the peripheral area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If power lines and conductive lines are arranged in the display area, then the screen-to-body ratio is improved, but the power consumption increases due to voltage drop
Solution Approach 1:
The patent divides the power delivery system into multiple parallel power lines and conductive lines arranged in a grid pattern throughout the display area. This segmentation allows distributed power delivery, reducing the current density in any single line and thereby minimizing voltage drop and power loss while maintaining high screen-to-body ratio
Solution Approach 2:
The patent transitions from traditional peripheral power delivery to a two-dimensional grid arrangement of power and conductive lines within the display area. This dimensional change enables power to be delivered from multiple directions simultaneously, reducing the effective resistance and power consumption while maximizing the usable display area
2Ease of manufacture
If contact holes are arranged in a regular grid pattern, then manufacturing is simplified, but display unevenness and Mura issues occur
Solution Approach 1:
The patent introduces asymmetric variations in contact hole spacing within the grid pattern. By making the spacing between contact holes different in different regions (e.g., larger spacing in certain areas, smaller spacing in others), the patent compensates for manufacturing tolerances and material properties to achieve more uniform display characteristics while maintaining the overall grid structure for ease of fabrication
Data Source
AI summary
A display panel, having a display area and a peripheral area outside the display area, includes: a driving backplane, comprising a substrate and a transistor layer, a first conductive layer, a first planarization layer and a second conductive layer sequentially provided in a direction away from the substrate; and a light-emitting device, provided on a side of the second conductive layer away from the substrate and located in the display area; wherein the light-emitting device comprises a first electrode, a light-emitting layer and a second electrode stacked in sequence in the direction away from the substrate; the first electrode is connected to at least one of the transistors through the second conductive layer, and the second electrode is connected to the second conductive line.