Bank-Integrated Electrode Layout for Higher-Resolution Displays
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Solution Overview
Problem
Current display devices face challenges in manufacturing efficiency and resolution due to complex electrode configurations and the need for multiple reflective partition walls, which increase the unit area occupied by each pixel and complicate the manufacturing process.
Innovation Solution
A display device design featuring a substrate with a first bank and electrodes arranged to act as reflective partition walls, where external and internal electrodes are spaced apart and overlap the bank, allowing for a simplified manufacturing process and increased pixel density by reducing the number of reflective partitions and optimizing electrode placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple reflective partition walls are used to distinguish neighboring regions, then light emission control is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the function of reflective partition walls with the bank structure by forming the reflective partition wall on the bank. The bank serves dual purposes: defining pixel boundaries and providing a reflective surface for light control, thereby eliminating the need for separate reflective partition structures and reducing overall device complexity
Solution Approach 2:
The bank structure is given multiple functions: it acts as a pixel boundary definer, a reflective partition wall, and an electrode support structure. This multi-functionality reduces the total number of components needed while maintaining effective light emission control between neighboring pixels
2Reliability
If multiple reflective partition walls are used to distinguish neighboring regions, then light emission control is improved, but manufacturing process complexity increases
Solution Approach 1:
The reflective partition wall is integrated with the bank structure formed in earlier manufacturing steps. By forming the reflective partition wall on the existing bank rather than creating separate structures, the manufacturing process is simplified while maintaining effective light control between pixels
3Reliability
If complex electrode configurations are used, then electrical connection reliability is improved, but productivity and manufacturing efficiency decrease
Solution Approach 1:
The electrode is integrated with the bank structure, where the bank serves as both a structural element and an electrode support. This integration reduces the number of separate electrode components and simplifies the manufacturing process while maintaining reliable electrical connections to the light emitting elements
Solution Approach 2:
The bank structure serves multiple functions including mechanical support, electrical conduction, and light reflection. This multi-functionality reduces the total number of components and manufacturing steps required while ensuring reliable electrical connections throughout the device
4Measurement precision
If more pixels are packed per unit area, then resolution is improved, but the area occupied by each pixel structure decreases
Solution Approach 1:
By merging the reflective partition wall function with the bank structure, the patent eliminates the need for additional space-consuming separate partition walls. This allows pixels to be packed more closely together, increasing pixel density and display resolution without compromising light control between adjacent pixels
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 manufacturing efficiency, reduces the unit area occupied by each pixel, and enables a higher resolution display by incorporating more pixels per unit area while maintaining effective light emission and reflection.
Implementation Method 1
at least portions of the first bank being spaced apart from each other... acting as a reflective partition wall
Data Source
AI summary
A display device includes: a substrate; a first bank on the substrate, at least portions of the first bank being spaced apart from each other; a plurality of first electrodes on the substrate, at least portions of the first electrodes being on portions of the first bank; a second electrode on the substrate, the second electrode being spaced apart from and between adjacent ones of the first electrodes; and a plurality of light emitting elements on the first electrodes and the second electrode.