Copper Complex Near-Infrared Absorbing Composition for Camera Flare Reduction
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Solution Overview
Problem
Existing near-infrared optical filters in electronic devices, such as camera modules, suffer from flare phenomena due to the absorption of near-infrared light, leading to optical distortion and reduced image quality, especially when capturing high luminance subjects.
Innovation Solution
A near-infrared absorbing composition comprising a copper complex with specific ligands, which provides excellent near-infrared absorbance and solubility in organic solvents, is used to form an optical structure with a near-infrared absorption layer, minimizing optical distortion and enhancing image clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a thin-film optical filter is used to down-size the electronic device, then the device size is reduced and integration is improved, but flare phenomena occur when observing high luminance subjects
Solution Approach 1:
The patent changes the chemical composition parameters of the optical filter by using a copper complex with specific ligands (L1 and L2) having particular molecular structures. This chemical parameter change enables the filter to selectively absorb near-infrared light while maintaining transparency in the visible region, thereby reducing flare phenomena while keeping the thin-film structure for device miniaturization
Solution Approach 2:
The patent employs a composite material approach by creating a copper complex composed of copper ions coordinated with specific organic ligands (L1 and L2). This composite structure combines the light-absorbing properties of copper complexes with the optical transparency requirements, achieving both flare reduction and visibility maintenance in a single thin-film layer
2Reliability
If an optical filter absorbs near-infrared light to reduce optical distortion, then image quality is improved, but flare phenomena occur due to the absorption mechanism
Solution Approach 1:
The patent applies local quality by designing the copper complex to have selective light interaction properties - it specifically absorbs near-infrared wavelengths (700-1000 nm) while allowing visible wavelengths (380-700 nm) to pass through. This wavelength-selective quality enables the filter to improve image quality by removing problematic near-infrared light without generating flare that would occur with broader absorption
3Object-affected harmful factors
If a conventional optical filter is used to block near-infrared light, then near-infrared absorption is achieved, but visible light absorption also occurs reducing image clarity
Solution Approach 1:
The patent precisely controls the optical parameters of the copper complex by selecting specific ligands (L1 and L2) with defined molecular structures. This parameter optimization shifts the absorption spectrum of the complex to target only the near-infrared region, maintaining high visible light transmittance while achieving effective near-infrared blocking, thus preventing both optical distortion and image darkening
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 copper complex-based near-infrared absorbing composition effectively absorbs near-infrared light while maintaining high solubility in organic solvents, reducing optical distortion and improving image quality by limiting flare phenomena, thus providing vivid and clear images.
Implementation Method 1
a near-infrared absorbing composition including a copper complex represented by Chemical Formula 1... having near-infrared absorbance and solubility in an organic solvent and low visible absorbance
Data Source
AI summary
Disclosed are a near-infrared absorbing composition, an optical structure, and a camera module and an electronic device including the same, wherein the near-infrared absorbing composition includes a copper complex represented by Chemical Formula 1:(L1)-Cu-(L2)n [Chemical Formula 1]Wherein in Chemical Formula 1, L1, L2, and n are described in the detailed description.