Light Emitting Element Alignment Using Multi-Layer Signal Lines
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Solution Overview
Problem
Existing display device manufacturing methods struggle to achieve a high alignment degree of light emitting elements, which affects the performance and efficiency of the display devices.
Innovation Solution
A method of manufacturing a display device that involves aligning light emitting elements between electrodes by applying specific alignment voltages to the electrodes and signal lines, with the signal lines formed from multiple conductive layers to enhance alignment precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional single-layer signal lines are used for aligning light emitting elements, then the manufacturing process is simple, but the alignment precision is insufficient
Solution Approach 1:
The patent transitions from a single-layer signal line structure to a multi-layer signal line structure. The first signal line includes a first conductive layer and a second conductive layer stacked in different dimensions, enabling three-dimensional voltage application for improved alignment precision of light emitting elements without excessive complexity increase
Solution Approach 2:
The signal line is segmented into multiple conductive layers (first conductive layer and second conductive layer) with different functions. The first conductive layer applies a first alignment voltage while the second conductive layer applies a second alignment voltage, allowing independent control of alignment parameters for enhanced precision
2Manufacturing precision
If multiple conductive layers are used in signal lines, then alignment precision is improved, but the device structure becomes more complex
Solution Approach 1:
The multi-layer conductive structure serves multiple functions: the first conductive layer provides alignment voltage application, the second conductive layer provides additional alignment control, and together they form an integrated signal line structure that combines electrical connection and alignment functions, reducing the need for separate alignment electrodes
Solution Approach 2:
The patent merges the alignment function with the signal line structure by integrating multiple conductive layers directly into the signal line. This combination eliminates the need for separate alignment electrodes and reduces overall device complexity despite the multi-layer construction
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method significantly improves the alignment degree of light emitting elements, leading to enhanced performance and efficiency in display devices by ensuring precise positioning and optimal electrical connections.
Implementation Method 1
applying a first alignment voltage to a pair of electrodes spaced apart from each other, applying a second alignment voltage to a first signal line overlapping the alignment area, and applying a third alignment voltage to a second signal line overlapping the alignment area
Data Source
AI summary
A method of manufacturing a display device includes aligning light emitting elements in an alignment area between electrodes spaced apart from each other. The aligning of the light emitting elements includes applying a first alignment voltage to the electrodes, applying a second alignment voltage to a first signal line overlapping the alignment area, and applying a third alignment voltage to a second signal line overlapping the alignment area. The first signal line is formed of a first conductive layer, and the second signal line is formed of the first conductive layer and a second conductive layer.