Island-Bridge Pixel Layout for Higher Light Output Displays
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Solution Overview
Problem
Current display devices face challenges in enhancing light output efficiency, particularly in the design and fabrication of sub-pixels and bridges within the display structure, which affects overall light emission and display performance.
Innovation Solution
The proposed display device incorporates a base layer with islands and bridges, where sub-pixels are designed with specific electrode configurations and light emitting elements to increase emission areas, enhancing light output efficiency by optimizing the placement and connection of light emitting elements between electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If light emitting elements are placed only in islands, then device complexity is reduced, but light output efficiency is insufficient
Solution Approach 1:
The base layer is segmented into islands and bridges, with light emitting elements selectively placed in both regions. This segmentation allows increasing the total emission area by utilizing bridge regions in addition to island regions, thereby improving light output efficiency without excessive complexity increase.
Solution Approach 2:
The design transitions from a single-dimensional island structure to a two-dimensional island-bridge network. By adding bridges as another structural dimension and placing light emitting elements in both islands and bridges, the total emission area is expanded, improving light output efficiency.
2Productivity
If emission area is increased by adding more light emitting elements, then light output efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
Adjacent bridges are merged into a continuous structure, and light emitting elements on adjacent bridges are electrically connected through shared electrodes. This merging reduces the number of discrete components and simplifies alignment requirements while increasing the total emission area.
Solution Approach 2:
Bridge structures serve dual functions: they provide mechanical support/connection between islands and simultaneously serve as emission regions containing light emitting elements. This multi-functionality increases emission area without proportionally increasing structural complexity or manufacturing difficulty.
3Productivity
If bridges are designed for light emission, then light output efficiency is enhanced, but device complexity increases
Solution Approach 1:
Bridges are designed to perform multiple functions: mechanical connection between islands and light emission. By making bridges multi-functional, the structure efficiently utilizes existing bridge regions for emission purposes without requiring entirely separate emission structures, thereby enhancing light output with moderate complexity increase.
Solution Approach 2:
Not all bridge regions are designed for light emission; only specific bridge portions contain light emitting elements. This partial action approach increases emission area strategically without making the entire bridge structure complex, balancing light output enhancement with manageable device complexity.
Data Source
AI summary
A display device may include: a base layer including a plurality of islands, at least one first bridge configured to connect the islands in a first direction, and at least one second bridge configured to connect the islands in a second direction; and at least one pixel including a plurality of sub-pixels in the base layer. Each of the sub-pixels may include: a first electrode and a second electrode in one island of the islands and spaced from each other; a third electrode and a fourth electrode in one bridge of the at least one first bridge and the at least one second bridge and spaced from each other; at least one first light emitting element between the first electrode and the second electrode; and at least one second light emitting element between the third electrode and the fourth electrode.