Window Heating Wire Layout for High Heat With Low Glare
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Solution Overview
Problem
Conventional heat-generating conducting bodies in window glasses, such as those used in vehicle windows, face challenges in achieving high heat generation performance while minimizing visual recognition and preventing glare and uneven heating, often resulting in reduced visibility due to beam of light and flicker.
Innovation Solution
The invention employs heat-generating conducting bodies with a rectangular cross section, arranged at specific angles and dimensions, and incorporates curved and interconnected conductive thin wires to enhance heat generation efficiency while minimizing visual impact and ensuring uniform heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the width of the heat-generating conducting body is increased to improve heat generation performance, then heat generation capability is improved, but visual recognition and glare increase reducing visibility
Solution Approach 1:
The patent transitions from increasing width (one dimension) to increasing thickness (another dimension) to enhance heat generation. The conducting body maintains a small width for visual invisibility while achieving high heat generation through increased thickness, effectively moving the solution to a different dimensional approach.
Solution Approach 2:
The conducting body employs an asymmetric cross-sectional shape where the thickness dimension is significantly larger than the width dimension. This asymmetric geometry allows the width to remain small for visual invisibility while the thickness provides sufficient cross-sectional area for high heat generation capability.
2Ease of manufacture
If conventional circular cross-section conductors are used, then manufacturing is simple, but the width increases causing visual recognition and reduced visibility
Solution Approach 1:
The patent replaces the symmetric circular cross-section with an asymmetric shape where width is minimized and thickness is maximized. This asymmetric geometry maintains manufacturing feasibility while dramatically reducing the width that causes visual recognition.
Solution Approach 2:
Instead of increasing the diameter of a circular cross-section (which increases width in all directions), the patent shifts to increasing the thickness dimension while keeping width small, effectively moving the growth direction to a different dimension.
3Power
If linear heat-generating conductors are used, then heat generation is efficient, but beam of light and flicker occur reducing visibility
Solution Approach 1:
The patent introduces curvature to the previously linear conductor path. The conductive thin wires follow curved trajectories between bus bars, which eliminates the straight-line geometry that causes beam of light and flicker effects while maintaining heat generation efficiency.
Solution Approach 2:
The patent divides the heat-generating conductor into multiple separate conductive thin wires rather than using a single thick linear conductor. This segmentation into multiple thin curved wires maintains total heat generation capability while eliminating the visual defects associated with single linear conductors.
4Power
If the thickness of the heat-generating conducting body is increased to improve heat generation, then heat generation performance is improved, but manufacturing precision becomes more difficult
Solution Approach 1:
The patent employs thin film deposition techniques to create the conductive layer with controlled thickness. This thin-film approach allows precise thickness control through deposition parameters while maintaining the small width dimension for visual invisibility.
Solution Approach 2:
The patent controls the thickness parameter through deposition conditions such as deposition rate, temperature, and material composition. By adjusting these parameters, the thickness can be precisely controlled to achieve desired heat generation performance while maintaining manufacturing feasibility.
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 effectively increases heat generation without increasing width, reduces glare and beam of light, and ensures consistent heating, thereby improving visibility and reducing uneven heat distribution.
Implementation Method 1
The heat-generating plate includes heat-generating conductors formed of tungsten lines and the like arranged across the entire heat-generating plate. In the heat-generating plate, by energizing the heat-generating conductor, the heat-generating conductor is heated by resistance heating.
Data Source
AI summary
A heat-generating plate that generates heat when a voltage is applied, including a pair of glasses, a pair of bus bars to which the voltage is applied, and a heat-generating conductor that can couple between the pair of bus bars. The heat-generating conductor includes a plurality of conductive thin wires that linearly extends between the pair of bus bars and couples between the pair of bus bars. An average Wave of a width W of one of said conductive thin wires is within a range of the following formula(a) relative to a standard deviation σ of distribution of the width W: 0≤4σ/Wave≤0.3 (Formula(a)).