LED Display Electrode Layout With Integrated Multi-Level Voltage Lines
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Solution Overview
Problem
Existing display devices require multiple manufacturing processes for forming voltage lines, which can increase complexity and cost.
Innovation Solution
The display device integrates voltage lines as separate conductive layers at different levels, reducing the need for a separate conductive layer and minimizing the number of manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If voltage lines are formed as separate conductive layers at different levels, then the number of manufacturing processes is reduced, but the device structure becomes more complex
Solution Approach 1:
The patent applies dimensionality change by forming voltage lines at different vertical levels (first conductive layer and second conductive layer) instead of arranging all lines in a single plane. This allows voltage lines to be integrated into the existing multi-layer conductive structure without requiring additional separate processing steps, thereby reducing manufacturing complexity while managing structural complexity through systematic layering
2Reliability
If multiple separate conductive layers are used for voltage lines, then voltage application to light emitting elements is effective, but manufacturing complexity and cost increase
Solution Approach 1:
The patent merges the voltage line function with existing conductive layers in the display device. The first and second conductive layers, which are already part of the device architecture, are utilized to carry voltage lines, combining multiple functions (signal transmission and voltage application) into the existing structure rather than adding separate dedicated voltage line layers
Data Source
AI summary
A display device includes: a first substrate; a first conductive layer including a first voltage line and a second voltage line on the first substrate; a first transistor on the first conductive layer and electrically connected to the first voltage line; a plurality of first banks on the first transistor and spaced apart from each other; a first electrode on the plurality of first banks and electrically connected to the first transistor, and a second electrode on the plurality of first banks and electrically connected to the second voltage line; a plurality of light-emitting diodes on the first electrode and the second electrode; and a first contact electrode coming into contact with an end portion of each of the light-emitting diodes and on the first electrode, and a second contact electrode coming into contact with another end portion of each of the light-emitting diodes and on the second electrode.