Display Panel Sensor Connection Line Resistance Reduction
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Solution Overview
Problem
Display panels face increased resistance due to the bottleneck phenomenon of power supply voltage in areas with densely arranged connection lines, leading to reduced performance and efficiency.
Innovation Solution
The display panel design includes a base layer with an active area and peripheral area, featuring data lines, lead-out lines, sensors, and a mesh structure that reduces resistance by optimizing the arrangement of connection lines and signal lines, with specific patterns and shapes to minimize bottlenecks and enhance signal distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If connection lines are densely arranged to reduce peripheral area, then the display panel's active area increases, but resistance increases due to bottleneck phenomenon of power supply voltage
Solution Approach 1:
The connection lines are divided into multiple segments with different widths along their length. The first connection line includes a first segment and a second segment with different widths, allowing the line to be segmented to reduce resistance in high-current regions while maintaining compact routing.
Solution Approach 2:
Different portions of the connection lines are given different local properties through varying widths. The first connection line has a wider first segment and a narrower second segment, optimizing the local cross-sectional area where it intersects with the second connection line to reduce resistance at the bottleneck location.
2Reliability
If connection lines are made wider to reduce resistance, then power supply voltage stability improves, but the peripheral area increases
Solution Approach 1:
The connection lines employ dynamic width variation rather than uniform width. The first connection line transitions from a wider first segment to a narrower second segment, creating a tapered structure that adapts the cross-sectional area to the local current density requirements, reducing resistance without maximizing peripheral area.
Solution Approach 2:
The geometric parameter (width) of the connection lines is changed along their length. The first connection line's width parameter varies between segments, with the first segment having a greater width than the second segment, optimizing electrical performance while controlling physical footprint.
Data Source
AI summary
A display panel includes a base layer, data lines extending in a first direction, arranged in a second direction crossing the first direction, pixels which are connected to the corresponding data lines and each of which includes an emission layer, lead-out lines extending in the first direction and between the data lines adjacent to each other, sensors which are connected to the corresponding lead-out lines, each of which includes a photoelectric conversion layer, and between the pixels adjacent to each other, and a sensor connection lines at one side and the other side of the base layer. Each of the sensor connection lines includes a first sensor pattern extending in the first direction and a second sensor pattern extending in the second direction to cross each of the data lines and the lead-out lines.