Light-Emitting Element Layout for Uniform Display Emission
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Solution Overview
Problem
Current light emitting devices face challenges in achieving uniform light emission and improved emission efficiency due to the limited number and uniform distribution of subminiature light emitting elements between electrodes.
Innovation Solution
A light emitting device design featuring a substrate with electrodes and insulating layers, where rod-type openings expose electrode portions to facilitate the alignment and connection of subminiature rod-type light emitting diodes, increasing their number and uniform distribution between electrodes, thereby enhancing emission efficiency and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of subminiature light emitting elements between electrodes is increased, then emission efficiency is improved, but uniform distribution becomes difficult to achieve
Solution Approach 1:
The patent divides the space between electrodes into multiple discrete regions by forming insulating layers with openings at specific positions. This segmentation allows precise control over where light emitting elements can be placed, enabling both increased quantity and uniform distribution. The openings act as designated slots that guide element placement while maintaining even spacing across the electrode gap.
2Ease of manufacture
If subminiature light emitting elements are sprayed in solution, then manufacturing is simplified, but alignment and connection between adjacent electrodes becomes challenging
Solution Approach 1:
The insulating layer with openings serves as an intermediary structure between the sprayed solution and the electrodes. When solution containing light emitting elements is sprayed, the insulating layer's openings capture and position the elements at predetermined locations. This intermediary structure translates the random spray deposition into precise alignment, enabling elements to connect properly between adjacent electrodes while maintaining the simplicity of solution-based manufacturing.
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
The design increases the number of light emitting elements between electrodes, leading to improved light extraction efficiency and uniform light emission, enhancing the overall performance of the light emitting device.
Implementation Method 1
Some of the subminiature light emitting elements may be aligned and connected between adjacent electrodes due to an electric field formed between the electrodes on the substrate
Data Source
AI summary
A light emitting device includes a substrate. First and second electrodes are on the substrate and spaced from each other. A first insulating layer is on the substrate and the first and second electrodes, and includes openings to partially expose opposing portions of the first and second electrodes adjacent an area between the first and second electrodes. At least one light emitting element is located in the opening. A first end of the at least one light emitting element is connected to a first portion of the first electrode exposed by the opening, and a second end of the at least one light emitting element is connected to a second portion of the second electrode exposed by the opening.