Stacked Light-Emitting Display Structure for High Luminance
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Solution Overview
Problem
Current display devices face challenges in efficiently arranging and connecting light emitting elements to enhance luminance and reduce light leakage, particularly in achieving high-density light emitting structures without compromising electrical connectivity and structural integrity.
Innovation Solution
The display device incorporates a layered structure with light emitting elements disposed on multiple insulating layers, where each element has ends facing opposite directions and is electrically connected through a series of connection electrodes, allowing for a high-density arrangement that improves luminance while minimizing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light emitting elements are arranged in a single layer, then the structure is simple, but the luminance is insufficient and light leakage occurs
Solution Approach 1:
The patent transitions from a single-layer planar arrangement to a multi-layer stacked configuration in the thickness direction. This dimensional change allows multiple light emitting elements to be vertically arranged, increasing luminance through cumulative light output while maintaining a compact footprint that prevents light leakage to adjacent elements.
Solution Approach 2:
The patent implements a nested layered structure where first light emitting elements are disposed on a first insulating layer, second light emitting elements on a second insulating layer, with connection electrodes penetrating through insulating layers to electrically connect elements across layers. This nesting approach packs multiple functional layers within a compact vertical space, achieving high luminance without proportionally increasing device area.
2Quantity of substance
If multiple light emitting elements are disposed in close proximity to increase density, then luminance increases, but light leakage between elements becomes problematic
Solution Approach 1:
The patent introduces insulating layers as intermediary structures between light emitting elements. These insulating layers act as barriers that electrically isolate and physically separate adjacent elements, preventing light leakage while allowing close spatial arrangement. The insulating material fills the gaps between elements, maintaining high density without compromising optical isolation.
3Area of stationary object
If light emitting elements are arranged in multiple layers with opposite orientations, then space utilization improves and luminance increases, but electrical connectivity becomes complex
Solution Approach 1:
The patent segments the electrical connection function across multiple connection electrodes distributed at different locations and layers. Instead of a single complex connection structure, multiple simpler connection electrodes are strategically positioned to establish electrical pathways between oppositely oriented elements, breaking down the connectivity challenge into manageable segments.
Solution Approach 2:
The patent applies different connection configurations at different locations within the device. Connection electrodes are selectively positioned where needed to bridge specific element pairs, with varying connection geometries adapted to local orientation requirements. This localized approach simplifies the overall connectivity system by addressing each connection point independently rather than implementing a uniform complex structure throughout.
Data Source
AI summary
A display device comprises a substrate, a first electrode and a second electrode disposed on the substrate, a first insulating layer disposed on the first electrode and the second electrode, first light emitting elements disposed on the first insulating layer, a first connection electrode disposed on the first electrode to contact first ends of the first light emitting elements and a second connection electrode disposed on the second electrode to contact second ends of the first light emitting elements, a second insulating layer disposed on the first light emitting elements, the first connection electrode and the second connection electrode, second light emitting elements disposed on the second insulating layer, a third connection electrode disposed on the first connection electrode to contact first ends of the second light emitting elements, and a fourth connection electrode disposed on the second connection electrode to contact second ends of the second light emitting elements.