Vehicle Window Glass Defogger Layout for Uniform Camera-Zone Heating
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Solution Overview
Problem
Conventional vehicle window glasses with heating wires surrounding the wiring prohibited region exhibit uneven temperature distribution, particularly in the area where the camera's imaging range is prohibited, affecting the effectiveness of defogging.
Innovation Solution
The vehicle window glass design incorporates a composite heating wire formed by connecting the first and second heating wires around the wiring prohibited region, along with a third heating wire below it, ensuring even heat distribution by integrating these wires to form a single composite heating wire that extends in the lateral direction on both sides of the prohibited area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single heating wire surrounds the wiring prohibited region in a one-stroke manner, then the antenna arrangement area is secured, but the temperature distribution in the wiring prohibited region becomes uneven
Solution Approach 1:
The heating wire is divided into multiple segments (first heating wire, second heating wire, third heating wire) instead of using a single continuous wire. These segments are arranged to extend in the lateral direction on both upper and lower sides of the wiring prohibited region, with connecting portions that join them around the prohibited region. This segmentation allows for better temperature distribution while maintaining antenna arrangement space.
2Reliability
If heating wires are arranged to surround the wiring prohibited region, then defogging effectiveness is improved, but the visibility and aesthetic appeal are reduced due to visible wires
Solution Approach 1:
The heating wires are arranged with different configurations in different regions. The first and second heating wires extend in the lateral direction on the upper side of the wiring prohibited region, while the third heating wire extends on the lower side. The connecting portions join these wires around the prohibited region, creating a localized arrangement that maintains defogging effectiveness while improving aesthetic appearance by distributing the wires more evenly.
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
This configuration achieves a uniform temperature distribution in the wiring prohibited region, effectively preventing fogging and maintaining optimal visibility for the camera's imaging range while ensuring aesthetic appeal by hiding the heating wires behind a shielding film.
Implementation Method 1
a defogger provided on the glass plate, in which the defogger includes a pair of bus bars extending in a vertical direction of the glass plate, and a plurality of heating wires connected between the pair of bus bars
Data Source
AI summary
A defogger includes a pair of bus bars extending in a vertical direction of a glass plate and plural heating wires, the glass plate has a first anti-fog region and a second anti-fog region surrounding a wiring prohibited region, the plural heating wires include a first heating wire, a second heating wire, and a third heating wire, the first heating wire and the second heating wire are connected to each other at connecting portions located around the wiring prohibited region, and the third heating wire has a section extending in the lateral direction below the wiring prohibited region, or the first heating wire has a section extending in the lateral direction above the wiring prohibited region, and the second heating wire and the third heating wire are connected to each other at connecting portions located around the wiring prohibited region to form a single composite heating wire.