Overlapping Power Lines Reduce Peripheral Area in Displays
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Solution Overview
Problem
Conventional display apparatuses face challenges in minimizing the peripheral non-display area, which affects the ratio of display area to non-display area, particularly in terms of size and portability.
Innovation Solution
The display apparatus incorporates a first power line and a second power line in the peripheral area, with the second power line overlapping the first power line, utilizing different layers and insulation materials to reduce the width of the peripheral area, and includes organic and inorganic film areas to prevent moisture penetration and facilitate bending without wiring breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If power lines are arranged in parallel in the peripheral area, then electrical connection is ensured, but the peripheral area width increases
Solution Approach 1:
The patent transitions from a two-dimensional parallel arrangement of power lines to a three-dimensional overlapping arrangement where the first power line and second power line are positioned at different heights. This vertical stacking allows both power lines to coexist in a reduced horizontal space, thereby reducing the peripheral area width while maintaining electrical connectivity.
Solution Approach 2:
The patent implements a nested structure where the second power line is positioned within the vertical projection of the first power line, creating an overlapping configuration. This nesting approach allows both power lines to occupy the same horizontal footprint at different vertical levels, effectively reducing the peripheral area required.
2Area of stationary object
If power lines are overlapped to reduce peripheral area, then display area ratio improves, but insulation and wiring complexity increases
Solution Approach 1:
The patent divides the insulation structure into multiple segments: a first insulation layer positioned between the first power line and the second power line in the overlapping region, and a second insulation layer positioned between the second power line and the substrate. This segmented insulation approach provides electrical isolation while allowing the compact overlapping arrangement.
Solution Approach 2:
The patent introduces insulation layers as intermediary elements between the overlapping power lines. The first insulation layer acts as a mediator between the first and second power lines, preventing electrical short circuits while enabling the reduced peripheral area configuration.
3Adaptability or versatility
If flexible substrate is used for portability, then device portability improves, but moisture penetration risk increases
Solution Approach 1:
The patent employs a composite encapsulation structure combining organic and inorganic encapsulation layers. The organic encapsulation layer provides flexibility for portability, while the inorganic encapsulation layer provides superior moisture barrier properties. This composite approach maintains both portability and moisture protection.
Solution Approach 2:
The patent uses thin film encapsulation layers (both organic and inorganic) to protect the flexible substrate from moisture penetration. These thin films maintain the flexibility required for portability while providing effective moisture barriers.
Data Source
AI summary
A display apparatus includes a display area in which a plurality of pixels are disposed to display an image and a peripheral area which is a non-display area. The display apparatus includes a first power line which is disposed in the peripheral area and provides a first voltage to the plurality of pixels, and a second power line which is disposed in the peripheral area and provides a second voltage different from the first voltage to the plurality of pixels. At least a portion of the first power line overlaps the second power line in the peripheral area.