Pixel Electrode Layout With Bank Pattern for Higher Light Emission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in improving the light emission efficiency of light emitting elements, primarily due to gaps between the light emitting elements and the light conversion pattern layer.
Innovation Solution
A pixel design is proposed, featuring a bank pattern on a substrate with first and second electrodes extending in a specific direction. Light emitting elements are placed on an insulating layer between these electrodes, with contact electrodes connecting the electrodes to the light emitting elements. This configuration reduces the gap with the light conversion pattern layer, enhancing light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light emitting elements are disposed on the substrate directly, then the structure is simple, but the gap with the light conversion pattern layer is large resulting in low light emission efficiency
Solution Approach 1:
The patent introduces a bank pattern as an intermediary structure between the substrate and the light emitting elements. This bank pattern serves as a mediator that reduces the gap between the light emitting elements and the light conversion pattern layer, thereby improving light emission efficiency while maintaining manufacturing simplicity.
Solution Approach 2:
The patent utilizes the vertical dimension by forming the bank pattern with a specific height that protrudes from the substrate surface. This dimensional change allows the light emitting elements to be positioned at an optimized height, reducing the gap with the light conversion pattern layer and improving light extraction efficiency.
2Loss of energy
If the gap between light emitting elements and light conversion pattern layer is reduced, then light emission efficiency is improved, but the alignment precision requirement increases
Solution Approach 1:
The bank pattern acts as an intermediary structure that provides a standardized platform for mounting light emitting elements. This mediator structure simplifies the alignment process by providing clear reference surfaces and positions, reducing the actual alignment precision requirements while still achieving the desired gap reduction for improved light emission efficiency.
Solution Approach 2:
The bank pattern is formed in advance before the light emitting elements are mounted. This preliminary action creates a pre-configured structure with optimized dimensions and positioning, which guides the subsequent placement of light emitting elements and reduces the alignment precision requirements during assembly.
3Loss of energy
If electrodes are extended in a specific direction on the bank pattern, then light emission efficiency is improved, but the device complexity increases
Solution Approach 1:
The electrode structure is segmented into multiple components: a first electrode extending in a first direction, a second electrode extending in a second direction, and contact electrodes connecting to the light emitting elements. This segmentation allows each electrode to be optimized for its specific function while maintaining overall manufacturing simplicity through standardized formation processes.
Solution Approach 2:
The electrodes are configured with different orientations and positions tailored to local requirements. The first electrode extends in a first direction to optimize electrical connection at its location, while the second electrode extends in a second direction to optimize connection at its location. This local optimization improves overall light emission efficiency without requiring a completely complex electrode architecture.
Data Source
AI summary
An embodiment provides a pixel including: a first bank pattern on a substrate; a first electrode and a second electrode on the first bank pattern and extending in a first direction; an insulating layer on the first electrode and the second electrode; a plurality of light emitting elements on the insulating layer between the first electrode and the second electrode; a first contact electrode electrically connecting the first electrode and the light emitting elements; and a second contact electrode electrically connecting the second electrode and the light emitting elements. The first electrode and the second electrode may be spaced from each other in a second direction different from the first direction on the first bank pattern.