Near-Infrared Absorbing Copper Complex Composition for Optical Distortion Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional near-infrared filters used in electronic devices, such as camera modules, suffer from optical distortion issues like flare phenomena due to inadequate absorption of near-infrared light, leading to image quality degradation.
Innovation Solution
A near-infrared absorbing composition comprising a copper complex with specific ligands and photo-polymerizable functional groups is developed, which forms a near-infrared absorption layer with improved absorbance in the 830-900 nm range and low visible light absorbance, minimizing optical distortion and haze.
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 phenomenon occurs causing optical distortion
Solution Approach 1:
The patent changes the chemical composition parameters of the optical filter by using a copper complex with specific ligands (phosphoric acid 2-hydroxy metacryl ester and ethyl sulfonic acid) to achieve improved near-infrared absorbance while maintaining thin-film form factor, thus resolving the contradiction between miniaturization and optical quality
Solution Approach 2:
The patent employs a composite material system consisting of copper complex coordinated with multiple ligands including phosphoric acid 2-hydroxy metacryl ester and ethyl sulfonic acid, creating a material with enhanced near-infrared absorption properties that prevents flare phenomenon while maintaining thin-film structure for device miniaturization
2Reliability
If near-infrared absorption is increased to reduce optical distortion, then optical quality is improved, but visible light absorbance and haze increase
Solution Approach 1:
The patent applies local quality by designing the copper complex to have selective absorption characteristics - the molecular structure is optimized to absorb specifically in the near-infrared region (830-900 nm) while maintaining high transparency in the visible light region, thus improving optical quality without increasing visible light absorbance or haze
Solution Approach 2:
The patent changes the absorption spectrum parameters of the optical filter material by using copper complex with specific ligands, shifting the absorption peak to the near-infrared region and reducing absorption in the visible region, thereby achieving improved optical quality without harmful increase in visible light absorbance and haze
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 composition effectively reduces optical distortion by selectively absorbing near-infrared light, enhancing image clarity and maintaining low haze in the visible light wavelength region, thereby improving the reliability and performance of camera modules.
Implementation Method 1
a maximum absorption wavelength of about 830 nm to about 900 nm
Implementation Method 2
the photo-polymerizable functional group may include a functional group represented by Chemical Formula 11
Data Source
AI summary
Disclosed are a near-infrared absorbing composition including a copper complex represented by Chemical Formula 1, a near-infrared absorption layer formed by using the near-infrared absorbing composition including the copper complex represented by Chemical Formula 1, an optical structure including the near-infrared absorption layer, and a camera module or an electronic device including the optical structure, wherein Chemical Formula 1 is provided below, andand in Chemical Formula 1, R1, R2, x, and y are the same as described in the detailed description.