RGB Emission Area Electrode Layout for High-Resolution Displays
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Solution Overview
Problem
Existing display devices face challenges in achieving high-resolution displays due to the large number of electrodes required for aligning light emitting elements, which complicates the manufacturing process and increases complexity.
Innovation Solution
The display device is designed with a substrate and bank layer that define multiple emission areas, each containing electrodes and light emitting elements, where adjacent emission areas emit different colors, reducing the number of electrodes needed by aligning electrodes in specific directions and sizes to allow for more emission areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of electrodes is increased to align light emitting elements, then the alignment precision improves, but the device complexity increases
Solution Approach 1:
The patent merges the functions of multiple electrodes into a single electrode structure. Specifically, one electrode serves as the common electrode for multiple light emitting elements arranged in a matrix, eliminating the need for separate electrodes for each element. This reduces the total number of electrodes while maintaining proper electrical connection and alignment for all light emitting elements, thereby resolving the contradiction between alignment precision and device complexity.
2Device complexity
If the number of electrodes is reduced to simplify manufacturing, then the device complexity decreases, but the alignment precision deteriorates
Solution Approach 1:
The patent implements universality by designing a single electrode that performs multiple functions: it serves as the common electrode for multiple light emitting elements, provides electrical connection to all connected elements, and maintains alignment precision for the entire matrix. This multi-functional electrode design allows reduction in electrode quantity without sacrificing alignment precision, as the single electrode is strategically positioned to serve all elements effectively.
3Manufacturing precision
If more emission areas are created to increase resolution, then the display resolution improves, but the number of electrodes required increases
Solution Approach 1:
The patent applies merging by consolidating electrode functions across multiple emission areas. A single common electrode is designed to electrically connect to light emitting elements across multiple emission areas, eliminating the need for separate electrodes in each area. This allows the creation of multiple emission areas for high resolution while keeping the electrode count low, as the same electrode structure serves multiple regions.
Solution Approach 2:
The common electrode is designed with universal functionality to serve light emitting elements across multiple emission areas simultaneously. This single electrode structure performs the function of what would traditionally require multiple separate electrodes, enabling high-resolution display with multiple emission areas while maintaining low device complexity through electrode reduction.
Data Source
AI summary
A display device includes a substrate, and a bank layer disposed on the substrate, and defining a first emission area, a second emission area, and a third emission area. Each of the first emission area, the second emission area, and the third emission area includes a first electrode and a second electrode extending in a first direction and spaced apart from each other in a second direction intersecting the first direction, and a plurality of light emitting elements disposed between the first electrode and the second electrode, the first emission area and the second emission area are adjacent to each other in the first direction, the third emission area is spaced apart from the first emission area or the second emission area in the second direction, and the first emission area, the second emission area, and the third emission area emit light of different colors.