Special-Shaped nLED Grain Display for AC Electromagnetic Coupling
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Solution Overview
Problem
Existing technologies face challenges in transferring and aligning nano-sized LED (nLED) grains with different light-emitting colors onto a circuit substrate for accurate electrical contact and bonding, particularly in ultrahigh-density and small-pitch displays.
Innovation Solution
A light-emitting display device utilizing special-shaped nLED grains with non-planar luminous layers perpendicular to the electric field, isolated by an insulating dielectric layer, and activated by an AC drive signal for electromagnetic coupling, ensuring efficient electrical and luminous performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional planar LED structures are used, then manufacturing is simple, but display resolution and pixel density are limited
Solution Approach 1:
The LED pixel is divided into multiple sub-pixels arranged in a non-planar configuration. Each sub-pixel can be independently controlled, allowing high-resolution displays while maintaining manageable manufacturing complexity through modular assembly processes
Solution Approach 2:
The patent transitions from conventional 2D planar LED arrangements to 3D non-planar structures. By stacking sub-pixels in multiple layers at different heights and angles, the invention achieves higher pixel density and display resolution without proportionally increasing manufacturing complexity
2Manufacturing precision
If non-planar 3D LED structures are implemented, then display resolution improves, but manufacturing complexity increases
Solution Approach 1:
The complex 3D pixel structure is segmented into standardized sub-pixel modules that can be manufactured separately and assembled. This modular approach allows precise control over each sub-pixel's position and orientation, achieving high pixel density while simplifying the overall manufacturing process through repetition and standardization
Solution Approach 2:
The invention varies parameters such as sub-pixel size, spacing, and angular orientation to optimize pixel density. By systematically adjusting these parameters during design and manufacturing, high resolution is achieved without requiring proportionally complex fabrication processes
3Illumination intensity
If special-shaped NANO LED crystal grains are used, then color purity and emission intensity improve, but manufacturing precision requirements increase
Solution Approach 1:
The patent optimizes crystallization parameters including temperature gradients, pressure conditions, and growth time to control NANO LED crystal grain formation. By precisely controlling these parameters, the invention achieves high color emission intensity with manageable manufacturing precision requirements
Solution Approach 2:
The invention utilizes controlled phase transitions during NANO LED crystal grain formation to achieve desired shapes and sizes. By managing melting, crystallization, and solidification processes, high-quality crystal grains with superior optical properties are produced without requiring excessive manufacturing precision
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 solution enhances electrical coupling and luminous efficiency by maintaining the luminous layer parallel to the electrode substrates and perpendicular to the electric field, improving alignment and bonding processes.
Implementation Method 1
n-type and p-type semiconductor layers are alternately stacked to form light-emitting diode (LED) crystal grains
Implementation Method 2
the active layer is made of an organic-inorganic hybrid perovskite material
Data Source
Figure 1~3
Figure 4
AI summary
A light-emitting display device based on special-shaped nLED grains comprises an upper drive electrode substrate, an upper drive electrode, special-shaped nLED grains, a lower drive electrode and a lower drive electrode substrate that are sequentially arranged from top to bottom, and is further provided with an AC drive control module having two ends connected to the upper drive electrode and the lower electrode respectively. The special-shaped nLED grains are nLED grains each comprising a non-planar luminous layer. The drive electrode is isolated from the nLED grains by insulating dielectric layer. In presence of the AC drive signal, the nLED grains are lighted up through electromagnetic coupling. By adoption of special-shaped nLED grains, when a grain sheet is disposed between the electrode substrates, the luminous layer of each nLED grain is always partially parallel to the electrode substrates and perpendicular to an electric field, thus greatly improving electrical coupling efficiency and luminous efficiency.