Heating Element Pattern Layout for Regional Heating and Low Visibility
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Solution Overview
Problem
Existing heating elements face challenges in controlling heating values across different regions, particularly requiring inconspicuous temperature control for user applications, and struggle with high surface resistance issues when driven at low voltage.
Innovation Solution
A heating element with a conductive heating pattern on a substrate, featuring a pattern of lines connecting vertices to form closed figures, where the number of lines varies by distance from bus bars, allowing for regions with different average line densities and high aperture ratios, ensuring uniform heating characteristics and reduced visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a heating line sheet or metal line is used to reduce surface resistance for low-voltage operation, then heating performance at low voltage is improved, but the heating pattern becomes more visible and aesthetic appearance deteriorates
Solution Approach 1:
The patent applies local quality by varying the line density of the heating pattern across different regions. The pattern has higher line density in peripheral regions and lower line density in the central region, allowing different parts of the same heating element to have different visual characteristics while maintaining overall heating effectiveness.
Solution Approach 2:
The heating pattern is segmented into multiple regions with different line densities. The pattern comprises a central region and peripheral regions, where each region has specifically controlled line density to balance visibility and heating performance in different areas of the glass surface.
2Manufacturing precision
If the number of lines in the heating pattern is increased to control regional heating values, then heating control precision is improved, but the aperture ratio decreases and visibility increases
Solution Approach 1:
The patent implements local quality by assigning different line densities to different regions of the heating pattern. The central region has lower line density to maintain high aperture ratio and low visibility, while peripheral regions have higher line density to provide sufficient heating control precision in those areas.
Solution Approach 2:
The patent changes the parameter of line density across different regions of the heating pattern. By adjusting the number of lines per unit area in different regions, the patent achieves precise control of regional heating values while maintaining overall high aperture ratio through selective placement of lines.
3Ease of manufacture
If a uniform heating pattern is used across the entire surface, then manufacturing simplicity is maintained, but the ability to provide differentiated regional heating is lost
Solution Approach 1:
The patent segments the heating pattern into multiple regions (central region and peripheral regions) with different line density characteristics. This segmentation enables differentiated regional heating functionality while maintaining a relatively simple overall pattern structure that can be manufactured using standard techniques.
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
Enables precise control of heating values across regions while maintaining a high aperture ratio, ensuring efficient heating performance even at low voltages and minimizing visibility of the heating pattern, thus effectively addressing the need for user-inconspicuous heating control.
Implementation Method 1
applying electric power to both terminals of the heating line, thereby increasing a temperature of the glass surface
Data Source
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AI summary
The present specification relates to a heating element in which a heating value for each region is controlled or a heating element in which the heating value for each region is controlled and which is inconspicuous, and a method for manufacturing the same.