Stepped Electrode Resonance Tuning for Display Pixels
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Solution Overview
Problem
Existing display devices struggle to efficiently adjust resonance distances for different wavelengths of light emitted from each pixel, which affects the micro-cavity effect and color accuracy.
Innovation Solution
A display device design that includes a substrate with stepped electrodes of varying numbers in different emission areas, allowing for distinct resonance distances and optimized micro-cavity effects for each pixel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the same number of electrodes are used in all emission areas, then the device structure is simple and manufacturing is easy, but the resonance distances cannot be adjusted for different wavelengths of light
Solution Approach 1:
The patent applies local quality by varying the number of electrodes in different emission areas according to the specific wavelength requirements of each color. Red emission areas have fewer electrodes, green areas have intermediate numbers, and blue areas have more electrodes, optimizing the micro-cavity effect for each wavelength while maintaining overall device functionality.
Solution Approach 2:
The electrode structure is segmented into multiple layers with different numbers of electrodes in different emission areas. This segmentation allows independent optimization of resonance distances for different colors (RGB) without affecting the entire device structure, enabling wavelength-specific tuning while maintaining manufacturing feasibility.
2Manufacturing precision
If different numbers of electrodes are used in different emission areas to adjust resonance distances, then color accuracy and micro-cavity effects are improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent resolves manufacturing complexity by adding a vertical dimension to the electrode structure. Instead of varying electrode patterns in the planar dimension, the invention uses multiple stacked electrode layers with different counts in different emission areas, achieving color precision through vertical stacking rather than complex lateral patterning.
3Illumination intensity
If stepped electrodes are added to adjust resonance distances for different wavelengths, then light emission characteristics are enhanced, but the device structure becomes more complex
Solution Approach 1:
The patent implements dynamic optimization by configuring different numbers of electrodes in different emission areas based on the specific light emission requirements of each color. This dynamic structural adaptation allows each emission area to have optimal resonance characteristics for its wavelength, enhancing overall light emission efficiency while using a systematic approach to manage structural complexity.
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 solution enables improved micro-cavity effects and color accuracy by adjusting resonance distances for each pixel, simplifying the manufacturing process while enhancing light emission characteristics.
Implementation Method 1
stacking stepped electrodes made of the same material as a pixel connection electrode in different numbers for each pixel, resonance distances for each pixel may be adjusted to be different from each other. Accordingly, it is possible to increase and/or optimize a micro-cavity (or thin film resonance) effect on light according to a wavelength of light to be emitted from each pixel
Data Source
AI summary
The present disclosure relates to a display device, and more particularly, to a display device capable of making resonance distances different from each other according to a wavelength of light to be emitted from each pixel while simplifying process steps, a manufacturing method of the display device, and an optical device including the display device. A display device comprises: a substrate; a bank disposed on the substrate and defining a plurality of emission areas; a plurality of pixel electrodes disposed in the plurality of emission areas; and at least one stepped electrode disposed between a pixel electrode of at least one emission area and the substrate. In the respective emission areas, the numbers of stepped electrodes between the respective pixel electrodes and the substrate are different from each other.