Variable Width Power Connection Line for Display Device
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Solution Overview
Problem
Display devices face issues with line heating and non-uniform light emission due to voltage drop and luminance deviations in power distribution, affecting the performance and efficiency of display panels.
Innovation Solution
The display device incorporates a unique power connection line structure with a wider central part and narrower outer parts, strategically positioned fan-out lines, and slit patterns to minimize voltage drop and enhance light emission uniformity by optimizing current distribution and reducing line heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If power connection lines have uniform width, then manufacturing is simple, but line heating occurs and voltage drop increases
Solution Approach 1:
The power connection line is designed with variable width where the central portion has a first width and the outer portions have a second width that is narrower than the first width. This local variation in geometry optimizes current distribution to reduce line heating while maintaining manufacturing feasibility through standard photolithography processes.
2Device complexity
If power connection lines have uniform width, then structure is simple, but light emission uniformity deteriorates
Solution Approach 1:
The power connection line features a central portion with a first width and outer portions with a second width that is narrower than the first width. This localized geometric variation optimizes power distribution to different regions of the display panel, compensating for voltage drop and achieving uniform light emission across the display area.
3Length of stationary object
If power connection lines are positioned closer to pad area, then electrical connection is shorter, but line heating increases
Solution Approach 1:
The power connection line is designed with a central portion having a first width and outer portions having a second width that is narrower than the first width. This geometric optimization reduces line heating by distributing current more effectively, allowing the line to be positioned closer to the pad area while maintaining acceptable temperature levels.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively minimizes line heating and improves light emission uniformity, leading to enhanced display panel performance and efficiency by ensuring consistent power delivery to pixels.
Implementation Method 1
a width of a central part of the first power connection line in the first direction is wider than a width of an outer part of the first power connection line in the first direction
Data Source
AI summary
A display device includes a display area and a non-display area; pixels disposed in the display area; a pad area including pads, the pad area being disposed in the non-display area; first power lines electrically connected to the pixels in the display area; first fan-out lines extending in a first direction in the non-display area, the first fan-out lines being electrically connected to the pads; and a first power connection line extending in a second direction intersecting the first direction in the non-display area, the first power connection line electrically connecting the first power lines to the first fan-out lines. A width of a central part of the first power connection line in the first direction is wider than a width of an outer part of the first power connection line in the first direction.