Flat Panel Display Sealing via Extraction of Power Supply Lines
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Solution Overview
Problem
Conventional active matrix organic electroluminescent (EL) displays face issues with moisture vulnerability and reduced display efficiency due to the use of metal caps and thin protection layers, which lead to increased dead space and limited protection of internal devices.
Innovation Solution
The solution involves a display design with a conductive layer having penetration holes and a via hole in a protection layer, where the conductive layer is arranged between the sealing portion and the substrate, and the via hole allows the sealant to directly contact an inorganic layer under the protection layer, enhancing the sealing function and reducing non-emitting areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal cap and sealing portion are used to protect the display area from moisture and external shock, then the protection and sealing function is improved, but the display area proportion is reduced due to increased dead space
Solution Approach 1:
The invention extracts the power supply line from the traditional routing through the sealing portion and relocates it to run along the outer edge of the display area, outside the sealing portion. This extraction allows the sealing portion to extend fully to the edges without being occupied by power supply lines, thereby eliminating dead space and maximizing the display area while maintaining protection function
Solution Approach 2:
The power supply line is routed in a different spatial dimension - along the outer edge perimeter rather than through the central sealing portion area. This dimensional change in routing path allows both the sealing portion and power supply line to coexist without overlapping, maximizing display area while maintaining both protection and power supply functions
2Area of stationary object
If the width of routing units is reduced to minimize dead space, then the display area proportion is improved, but the resistance of routing units is increased
Solution Approach 1:
The power supply line is routed along the outer edge in a perimeter path rather than through the sealing portion, effectively increasing its length but allowing it to maintain adequate width. This dimensional change in routing path resolves the conflict between width and display area by using the peripheral space efficiently
Solution Approach 2:
The power supply line is segmented into multiple sections along the outer edge, with each section maintaining adequate width for low resistance. The segmentation allows the total power supply function to be distributed while each segment maintains optimal electrical properties
Data Source
AI summary
A display includes: a display area adapted to form an image with display devices arranged on a substrate; a sealing portion adapted to seal at least the display area with a sealant arranged along an outer edge portion of the display area; and a driving power supply line adapted to supply a driving voltage to the display area. The driving power supply line includes at least one conductive layer, at least a portion thereof being arranged between the sealing portion and the substrate. Each conductive layer includes at least one penetration hole.