LED Light Efficiency Improving Layer Blocks Harmful Wavelengths
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Solution Overview
Problem
Light emitting diodes (LEDs) used in display devices are prone to degradation due to external environmental factors, particularly harmful wavelengths, leading to reduced lifespan and efficiency.
Innovation Solution
A light emitting diode structure incorporating a light efficiency improving layer with specific chemical compounds that block harmful wavelengths, such as those between 400 nm to 410 nm, is positioned on the electrodes to prevent emission layer degradation, comprising materials like Compound A1 to Compound A20, which enhance light efficiency and extend the diode's lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the light emitting diode is used in various environments, then the versatility and applicability of the device is improved, but the emission layer is damaged by external environmental factors leading to reduced lifespan
Solution Approach 1:
The patent introduces a light efficiency improving layer as an intermediary component between the emission layer and the external environment. This layer specifically blocks harmful wavelengths (400-410 nm) while allowing useful light to pass through, thereby protecting the emission layer from environmental damage without compromising the device's versatility in various operating conditions
2Use of energy by moving object
If the emission layer is exposed to harmful wavelengths, then the light efficiency may be improved, but the emission layer degradation occurs leading to shortened device lifespan
Solution Approach 1:
The patent applies local quality by making the light efficiency improving layer selectively transparent to different wavelengths. The layer is designed to block specific harmful wavelengths (400-410 nm) while allowing other wavelengths that contribute to light efficiency to pass through, thereby achieving localized spectral filtering that protects the emission layer while maintaining overall light efficiency
Solution Approach 2:
The patent converts the harmful effect of certain wavelengths by using the light efficiency improving layer to block these specific wavelengths (400-410 nm) that cause degradation. This selective blocking transforms the harmful spectral components into a protective mechanism, allowing the device to maintain high light efficiency from beneficial wavelengths while eliminating the damaging effects
3Reliability
If a light efficiency improving layer is added to block harmful wavelengths, then the emission layer protection is improved, but the device structure becomes more complex
Solution Approach 1:
The patent implements the light efficiency improving layer as a thin film structure that can be integrated into the existing LED architecture. This thin film approach provides effective wavelength blocking without adding significant structural complexity or thickness, maintaining the compact nature of the device while achieving reliable emission layer protection
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 prevents emission layer degradation by blocking harmful wavelengths, resulting in improved luminance, efficiency, and extended half-lifespan of the LEDs, even when exposed to sunlight or other environmental stressors.
Implementation Method 1
The light efficiency improving layer may have an absorption ratio of 0.30 or more at a wavelength of 400 nm to 410 nm
Data Source
AI summary
A light emitting diode is presented, including: a first electrode; a second electrode overlapping the first electrode; an emission layer interposed between the first electrode and the second electrode; and a light efficiency improving layer positioned on at least one of the first electrode and the second electrode, wherein at least one of the first electrode and the second electrode may include one surface facing the emission layer and the other surface opposing the one surface and including the other surface on which the light efficiency improving layer is positioned.