Ink Composition for Automotive Heating Element Visibility Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing heating glass technologies for automotive applications face challenges in achieving adequate heating at low voltages while maintaining optical transparency and minimizing visibility issues due to thick metal patterns, which are visually noticeable and reflective.
Innovation Solution
An ink composition comprising an aromatic epoxy resin, a thermal acid generator, and an organic dye is used to form a cured pattern with low light transmittance, applied on a conductive heating pattern to reduce visibility and reflection, and integrated into a heating element with a substrate and bonding film for efficient heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transparent conductive oxide film such as ITO is used to form a transparent conductive thin film on the whole glass surface, then excellent optical transparency is achieved, but adequate heating value cannot be obtained at low voltages due to relatively high resistance value
Solution Approach 1:
The invention divides the glass surface into patterned regions with conductive heating lines and transparent regions, rather than covering the entire surface with a continuous conductive film. This segmentation allows the conductive material to be concentrated in specific heating zones, reducing overall resistance while maintaining optical transparency in non-heating areas.
Solution Approach 2:
The conductive heating pattern is applied locally to specific regions of the glass rather than uniformly across the entire surface. This local application of conductivity allows for optimized heating performance in targeted areas while preserving optical clarity in other regions, resolving the contradiction between transparency and heating efficiency.
2Power
If a thick tungsten wire with diameter of 18 micrometers or greater is inserted to PVB film for heating glass, then conductivity capable of securing sufficient heating value at low voltages is obtained, but the tungsten line is visually noticeable due to the relatively thick tungsten line
Solution Approach 1:
Instead of using physical tungsten wires that are visible, the invention uses a printed conductive pattern that replicates the heating function. The conductive ink pattern is applied as a thin layer through printing processes, creating a functional copy of the wire-based heating system with superior optical properties.
Solution Approach 2:
The invention replaces thick rigid tungsten wires with thin flexible conductive ink patterns printed on the glass surface. These thin film patterns provide the necessary electrical conductivity for heating while being optically transparent or translucent, eliminating the visual noticeability problem of thick wires.
3Illumination intensity
If a metal pattern is formed on a PET film through printing process or photolithography process to reduce line thickness, then visibility of driver may be improved, but high reflection property of the metal pattern causes visibility issues while driving
Solution Approach 1:
The invention changes the material parameters of the conductive pattern from traditional metals with high reflectivity to conductive inks with adjustable optical properties. By modifying the composition, thickness, and morphology of the conductive ink layer, the reflection property is reduced while maintaining electrical conductivity for heating functionality.
Solution Approach 2:
The conductive heating pattern uses composite material formulations including conductive particles, binders, and solvents in specific ratios. This composite approach allows optimization of both electrical conductivity and optical properties, reducing reflection and improving driver visibility while maintaining heating performance.
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 provides a durable and efficient heating element with reduced visibility of the conductive heating pattern, achieving effective heating at low voltages and minimizing reflection, thus addressing the limitations of existing technologies.
Implementation Method 1
a thermal acid generator
Implementation Method 2
a derivative in which an acid generated by a thermal acid generator and an epoxy group of an aromatic epoxy resin form bonds
Implementation Method 3
generating heat from the heating line by applying electricity to both terminals of the heating line
Implementation Method 4
an organic dye
Data Source
AI summary
The present specification relates to an ink composition, a cured pattern prepared using an ink composition, a heating element including a cured pattern, and a method for manufacturing a heating element.