Pixel Electrode Layout for Stable Light Emitting Element Spacing
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Solution Overview
Problem
Display devices face issues with light output efficiency due to the collapse of light emitting elements caused by their arrangement on pixel electrodes, leading to reduced image quality.
Innovation Solution
A display device design featuring pixel electrodes with a rectangular shape and light emitting elements where the width of the elements is larger than the short side of the electrodes but smaller than the interval between them, preventing collapse and optimizing light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If light emitting elements are arranged on pixel electrodes with conventional dimensions, then device complexity is reduced, but light emitting elements collapse causing low light output efficiency
Solution Approach 1:
The patent changes the dimensional parameters of the light emitting elements by defining their width to be larger than the short side of the pixel electrode. This parameter modification prevents collapse while maintaining proper spacing (width smaller than the interval between pixel electrodes), thereby resolving the contradiction between structural stability and light output efficiency.
2Reliability
If light emitting elements are made wider to prevent collapse, then structural stability improves, but spacing between elements decreases potentially causing overlap
Solution Approach 1:
The patent establishes a specific parameter range for the width of light emitting elements: larger than the short side of the pixel electrode (to prevent collapse) but smaller than the interval between pixel electrodes (to maintain proper spacing). This dual constraint parameter definition resolves the contradiction by finding the optimal width range that satisfies both structural stability and spacing requirements.
Data Source
AI summary
A display device includes a substrate, a plurality of pixel electrodes disposed on the substrate and spaced apart from each other at a first interval and a plurality of light emitting elements respectively disposed on the plurality of pixel electrodes. Each of the pixel electrodes has a rectangular shape having a long side and a short side, and a width of each of the light emitting elements is larger than a width of the short side and smaller than the first interval between the pixel electrodes.