Photonic Crystal Light-Emitting Array for Stray Light Suppression
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Solution Overview
Problem
Existing light emitting element arrays face challenges in suppressing stray light, achieving high luminance, and reducing power consumption, as evident from the limitations of previous techniques such as those described in Patent Document 1.
Innovation Solution
The introduction of a light emitting element array with a photonic crystal structure, where the optical adjustment layer features a periodic refractive index change, allowing for controlled light emission and improved light directionality, thereby enhancing luminance and reducing power consumption while minimizing stray light propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional light emitting element arrays are used, then device simplicity is maintained, but stray light suppression is insufficient
Solution Approach 1:
The patent applies parameter changes by introducing a photonic crystal structure with periodically varying refractive index in the optical adjustment layer. This periodic modulation of the refractive index parameter creates photonic bandgaps that selectively suppress stray light propagation while maintaining device functionality, thus improving stray light suppression without excessive complexity increase
Solution Approach 2:
The patent employs composite materials by integrating a photonic crystal structure into the optical adjustment layer. This composite structure combines materials with different refractive indices in a periodic arrangement, creating effective photonic bandgap properties that suppress stray light while maintaining overall device performance
2Illumination intensity
If conventional light emitting structures are used, then power consumption is higher, but luminance is reduced
Solution Approach 1:
The patent utilizes parameter changes through the photonic crystal structure's periodic refractive index modulation. This structure optimizes light extraction efficiency and directional emission, increasing luminance while reducing the energy required to achieve the same brightness level compared to conventional structures
Solution Approach 2:
The patent replaces conventional light management approaches with photonic crystal-based optical control. This substitution uses photonic bandgap effects and constructive interference principles to enhance light emission efficiency, achieving higher luminance with lower power consumption without mechanical moving parts
3Object-affected harmful factors
If holes are formed in the structure as in Patent Document 1, then current can be controlled in specific regions, but stray light suppression remains insufficient
Solution Approach 1:
The patent applies parameter changes by implementing a periodic refractive index modulation through photonic crystal structures. This approach provides superior stray light suppression compared to simple hole formation, while the periodic structure can be manufactured using standard semiconductor fabrication techniques, maintaining reasonable ease of manufacture
Solution Approach 2:
The patent uses composite materials in the photonic crystal structure to achieve enhanced stray light suppression. The composite nature of the photonic crystal layer can be integrated into existing manufacturing processes, balancing improved performance with manufacturing feasibility
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 proposed solution effectively increases luminance, reduces power requirements, and suppresses stray light by utilizing a photonic crystal structure with periodic refractive index changes in the optical adjustment layer, addressing the limitations of previous technologies.
Implementation Method 1
an optical adjustment layer having a photonic crystal structure, and a light emitting unit including the light emitting element and the optical adjustment layer
Implementation Method 2
a periodic structure portion in which a refractive index periodically changes
Data Source
AI summary
Provided are a light emitting element array, a light emitting device, an electronic device, and a photonic crystal structure which are improved in stray light suppression, high luminance, and low power consumption. A light emitting element array includes a plurality of a light emitting element including a light emitting surface, in which a plurality of a light emitting unit is formed including at least one of the light emitting element and capable of controlling light emission from the light emitting surface of the light emitting element, and the plurality of the light emitting unit is provided with an optical adjustment layer at least partially including a periodic structure portion in which a refractive index periodically changes.