Display Connection Member Reducing Self-Resistance
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Solution Overview
Problem
Current display apparatuses face challenges in optimizing the structure of light-emitting diodes and pixel circuits to reduce self-resistance and prevent defects like early and progressive bright spots, which affect the efficiency and reliability of light emission.
Innovation Solution
The display apparatus incorporates a specific structure with a driving voltage line, a conductive layer, and a connection member that electrically connects the driving voltage line and semiconductor layer, where the connection member is arranged to overlap the driving voltage line and protrude from it, reducing self-resistance and preventing short circuits by avoiding formation on slope portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connection member is formed to overlap the driving voltage line, then the self-resistance is reduced and voltage drop is improved, but the manufacturing complexity increases due to precise alignment requirements
Solution Approach 1:
The connection member is extended in the first direction (lengthwise along the voltage line) rather than only in the thickness direction, creating a multi-dimensional overlap structure that increases contact area and reduces resistance while maintaining alignment feasibility
Solution Approach 2:
The connection member is divided into multiple portions (first portion overlapping the voltage line, second portion protruding therefrom) that can be formed in different layers, allowing staged manufacturing and reduced alignment complexity
2Reliability
If the connection member protrudes from the driving voltage line, then short circuits are prevented by avoiding slope portions, but the device area increases
Solution Approach 1:
The connection member has different functions in different portions: the first portion provides electrical connection by overlapping the voltage line, while the second portion provides mechanical stability and short-circuit prevention by protruding to a flat surface, optimizing both functions in their respective locations
Data Source
AI summary
A display apparatus includes: a substrate; a driving voltage line on the substrate and extending in a first direction; a first conductive layer on a same layer as the driving voltage line and spaced apart from the driving voltage line; a first insulating layer covering the driving voltage line and the first conductive layer; a driving transistor on the first insulating layer and comprising a driving gate electrode and a driving semiconductor layer overlapping the first conductive layer; and a connection member electrically connecting the driving voltage line and the driving semiconductor layer to each other, wherein an edge of the driving semiconductor layer is in contact with or inside an edge of the first conductive layer in a plan view.