Electrode Bank Layout for Light-Emitting Element Alignment
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Solution Overview
Problem
Existing display devices face challenges in achieving uniform alignment and dispersion of light-emitting elements due to variations in electrode configurations, leading to inefficiencies and potential loss of light-emitting elements.
Innovation Solution
The display device incorporates a design with internal banks and electrodes where different electrodes are spaced apart on the same bank, allowing for the application of varying voltages to induce alignment signals, creating alignment areas for light-emitting elements between electrodes while minimizing non-alignment areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electrodes are configured with varying voltages to create alignment signals, then alignment of light-emitting elements is improved, but device complexity increases due to additional electrode structures
Solution Approach 1:
The electrode structure is segmented into multiple electrodes (first electrode, second electrode, third electrode) with different voltage applications. Each electrode serves a specific function in creating alignment signals, allowing precise control over light-emitting element positioning while managing complexity through functional segmentation
Solution Approach 2:
Different regions of the electrode structure are assigned different voltage potentials (first voltage, second voltage, third voltage) to create localized alignment signals. This local quality variation enables precise alignment control in specific areas where light-emitting elements need to be positioned, without requiring complex voltage control across the entire device
2Illumination intensity
If light-emitting elements are intensively disposed between specific electrodes, then brightness and efficiency are improved, but loss of light-emitting elements increases due to dispersion variations
Solution Approach 1:
The electrode configuration creates equipotential regions between adjacent electrodes with different voltages. Light-emitting elements are attracted to and align within these equipotential zones, ensuring intensive disposal in bright display areas while minimizing waste in non-alignment regions through controlled electrical field distribution
Solution Approach 2:
The patent replaces mechanical alignment methods with electrical field-based alignment using voltage-differentiated electrodes. This substitution enables more precise and controllable positioning of light-emitting elements, reducing dispersion variations and minimizing element loss while achieving intensive disposal in required areas
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
This design enhances the uniform dispersion and alignment of light-emitting elements, reducing losses and improving the overall efficiency and brightness of the display device by ensuring that light-emitting elements are intensively disposed between specific electrodes.
Implementation Method 1
different electrodes are spaced apart on the same bank, allowing for the application of varying voltages to induce alignment signals
Data Source
AI summary
A display device includes first and second internal banks extending in a first direction on a substrate and spaced apart from each other in a second direction different from the first direction; a first electrode including a first main electrode extending in the first direction on a side of the first internal bank and a first sub-electrode extending in the first direction on another side of the first internal bank and at least partially spaced apart from and facing the first main electrode; a second electrode extending in the first direction on a side of the second internal bank and spaced apart from and facing the first main electrode; and a light emitting element disposed between the first internal bank and the second internal bank, and the light emitting element has an end disposed on the first main electrode and another end on the second electrode.