Stretchable Display Power Mesh for Narrow Bezel Uniformity
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Solution Overview
Problem
Conventional display devices face challenges in reducing bezel area, minimizing voltage deviation due to internal resistance, and achieving high luminance uniformity, especially in large and flexible display applications.
Innovation Solution
A stretchable display device design featuring a lower and upper substrate with a pattern layer, power connection lines disposed in a mesh pattern on the active area to reduce bezel area and voltage deviation, and improve luminance uniformity, utilizing flexible materials like polydimethylsiloxane (PDMS) and polyurethane (PU) for flexibility and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If power connection lines are disposed on the non-active area (bezel area), then the wiring is simpler and easier to manufacture, but the bezel area increases and the device cannot achieve high resolution and large area
Solution Approach 1:
The patent transitions power connection lines from the non-active area (bezel) to the active area, utilizing the vertical dimension and mesh pattern configuration within the active display region. This dimensional repositioning reduces bezel area while maintaining manufacturing feasibility through systematic mesh integration
Solution Approach 2:
The patent segments the power connection lines into multiple mesh-patterned lines distributed across the active area, replacing a single centralized wiring approach. This segmentation enables reduced bezel area while distributing the wiring complexity across multiple smaller, manageable segments throughout the display
2Reliability
If power connection lines are disposed far from pixels, then the wiring is simpler, but the voltage deviation due to internal resistance increases and luminance uniformity deteriorates
Solution Approach 1:
The patent applies local quality by positioning power connection lines specifically within the active area in close proximity to pixels, creating localized power distribution zones. This ensures each pixel region receives adequate power supply while maintaining overall system reliability and luminance uniformity
Solution Approach 2:
The patent introduces a mesh pattern configuration that adds spatial distribution across the active area, transforming the power connection from a simple linear arrangement to a two-dimensional network. This dimensional expansion reduces voltage deviation by providing multiple parallel power paths while managing complexity through regular mesh geometry
3Volume of stationary object
If the display device is made large-sized with high resolution, then the display quality improves, but the voltage deviation due to internal resistance increases and luminance uniformity worsens
Solution Approach 1:
The patent segments the large display area into multiple zones served by numerous mesh-patterned power connection lines distributed throughout the active area. This segmentation divides the large-scale power distribution problem into smaller local zones, reducing voltage deviation across the entire display while maintaining luminance uniformity
Solution Approach 2:
The patent employs a two-dimensional mesh pattern configuration for power connection lines across the large display area, transforming traditional one-dimensional wiring approaches. This dimensional expansion provides multiple parallel power paths that reduce internal resistance effects and voltage deviation in large-sized displays
Data Source
AI summary
According to an aspect of the present disclosure, a display device includes a lower substrate which includes an active area and a non-active area and is stretchable; a pattern layer which is disposed on the active area of the lower substrate and includes a plurality of first plate patterns and a plurality of first line patterns; a plurality of pixels which is disposed on each of the plurality of first plate patterns; a plurality of connection lines which is disposed on the plurality of first line patterns and configured to connect the pixels; and a plurality of power connection lines configured to supply a power voltage to the pixels, and the power connection lines are disposed between the pixels on the active area.