Display Electrode Layout for Centered Light Emission
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Solution Overview
Problem
Display devices face inefficiencies in light emission due to the presence of non-emitting light emitting elements, which reduce overall light emission efficiency and require optimization of element placement within the emission area.
Innovation Solution
The display device incorporates a specific configuration of electrodes and connection electrodes with extension portions and connection portions that overlap on a bank layer, strategically placing light emitting elements adjacent to the center of the emission area to minimize non-emitting elements and enhance light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If light emitting elements are distributed across the entire emission area, then the emission area is fully utilized, but the number of non-emitting light emitting elements increases reducing light emission efficiency
Solution Approach 1:
The patent transitions from a two-dimensional planar distribution of light emitting elements to a three-dimensional stacked configuration. Multiple light emitting elements are arranged in vertical layers above the same or overlapping horizontal positions, allowing full utilization of the emission area while concentrating light output from multiple elements in the same footprint, thereby eliminating non-emitting elements.
Solution Approach 2:
The patent implements a nested arrangement where multiple light emitting elements are stacked vertically, with each subsequent element positioned above and overlapping the previous one. This nesting allows multiple active light emitting elements to occupy the same horizontal space, ensuring that every position in the emission area contributes to light output while maximizing space utilization.
2Reliability
If connection electrodes are extended to connect light emitting elements, then electrical connectivity is achieved, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines multiple connection functions into single integrated electrode structures. The connection electrodes are designed to simultaneously connect multiple light emitting elements and provide structural support for the stacked configuration. By merging the connection functions for multiple elements into unified electrode patterns, the patent reduces the number of separate connection structures needed while maintaining reliable electrical connectivity across all stacked elements.
3Productivity
If light emitting elements are concentrated at the center of the emission area, then light emission efficiency improves, but the total emission area coverage decreases
Solution Approach 1:
The patent resolves this contradiction by adding the vertical dimension to the arrangement. Instead of spreading elements horizontally across the emission area, multiple elements are stacked vertically at central positions. This allows the emission area to remain compact and centrally concentrated for high efficiency, while the vertical stacking provides the necessary capacity and coverage through layered arrangement rather than horizontal expansion.
Data Source
AI summary
A includes electrodes comprising a first electrode, a second electrode, and a third electrode extending in a first direction and spaced in a second direction crossing the first direction, a first light emitting element, a second light emitting element, a third light emitting element, and a fourth light emitting element on the electrodes spaced in the second direction, a first connection electrode on the first electrode and connected to one end of the first light emitting element, a second connection electrode on the second electrode and connected to one end of the fourth light emitting element, a third connection electrode on the first electrode and the third electrode, and connected to an other end of the first light emitting element and one end of the second light emitting element, a fourth connection electrode, and a fifth connection electrode.