Shielded Voltage-Line Layout for Light-Emitting Display Alignment
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Solution Overview
Problem
Existing display devices face challenges in aligning light-emitting elements effectively due to the influence of high-level and low-level voltage lines, which affects the reliability and efficiency of the display.
Innovation Solution
The display device incorporates a specific configuration with a first voltage line providing high-level voltage, a vertical voltage line providing low-level voltage, and additional electrodes and connections that suppress the influence of these voltage lines, allowing for better alignment of light-emitting elements between electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-level voltage line and low-level voltage line are disposed near light-emitting elements, then electrical connection is ensured, but alignment of light-emitting elements is adversely affected
Solution Approach 1:
The patent extracts the voltage lines from the immediate vicinity of light-emitting elements by introducing a shield layer that electrically shields the light-emitting elements from the voltage lines. This separation allows the voltage lines to maintain their electrical connection function while removing their adverse influence on light-emitting element alignment, thus resolving the contradiction between connection reliability and alignment precision.
Solution Approach 2:
The shield layer acts as an intermediary between the voltage lines and light-emitting elements. It provides electrical shielding to prevent the voltage lines from interfering with light-emitting element alignment, while still allowing the voltage lines to perform their electrical connection function. This mediator resolves the conflict by isolating the harmful electromagnetic influence while maintaining necessary electrical connections.
2Adaptability or versatility
If voltage lines are positioned to provide electrical connection, then device functionality is ensured, but light-emitting element alignment is disrupted
Solution Approach 1:
The patent extracts the electromagnetic interference from the voltage lines by introducing a shield layer that blocks the electrical influence on light-emitting elements. This allows the voltage lines to maintain their device functionality while removing their disruptive effect on alignment precision, resolving the contradiction between functionality and manufacturing precision.
Solution Approach 2:
The shield layer serves as an intermediary that permits voltage lines to maintain their electrical connection function for device operation while preventing their electromagnetic fields from disrupting light-emitting element alignment. This mediator enables both device functionality and precise alignment to coexist.
Data Source
AI summary
A display device comprises a first voltage line disposed in a first metal layer on a substrate providing a high-level voltage, a vertical voltage line disposed on a side of the first voltage line providing a low-level voltage, a first transistor disposed in an active layer on the first metal layer and including a drain electrode, an active region, a source electrode, and a gate electrode, a first anode connection electrode disposed in a third metal layer on the second metal layer and electrically connected to the source electrode of the first transistor, a first electrode and a second electrode that are disposed in a fourth metal layer on the third metal layer, and a plurality of light-emitting element areas including a plurality of light-emitting elements aligned between the first and second electrodes and spaced apart from the first voltage line and the vertical voltage line in a plan view.