Heat-Ray Reflecting Window Glass With Slit Pattern Continuity
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Solution Overview
Problem
Existing techniques face challenges in preventing interruptions between patterns formed in different steps on heat-ray reflecting substrates, particularly for radio-wave transmitting regions, which affects radio-wave transmissibility and aesthetic appearance.
Innovation Solution
The heat-ray reflecting substrate features a radio-wave transmitting region with a first repeating pattern formed of slit portions, where each unit pattern includes a line portion and a connection portion extending in a different axis direction, allowing for reliable connection of patterns across steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heat-ray reflecting film is partially removed by laser etching to form a periodic pattern for radio-wave transmission, then radio-wave transmissibility is improved, but the risk of pattern interruption at joints between multi-step processed regions increases
Solution Approach 1:
The patent applies preliminary action by designing the pattern geometry beforehand to inherently prevent interruption risks. The connection portions are planned in advance with sufficient width and overlapping arrangement, so that even if positioning errors occur during multi-step laser processing, the patterns will still connect reliably without interruptions.
Solution Approach 2:
The patent implements beforehand cushioning by creating overlapping regions between adjacent patterns where connection portions extend beyond the minimal required boundaries. This overlapping design acts as a buffer zone that compensates for potential positioning errors during multi-step processing, ensuring continuous pattern coverage even when joints occur between processed regions.
2Reliability
If patterns are arranged in a partially overlapping manner to prevent interruption, then pattern connection reliability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by differentiating the geometry of different pattern portions. The connection portions have larger widths and extend in multiple directions compared to the main pattern lines. This local geometric enhancement creates inherent tolerance to positioning errors, reducing the overall manufacturing precision requirements while maintaining connection reliability.
Solution Approach 2:
The patent employs asymmetry in the connection portion design, where the connection portions extend not only in the direction of pattern arrangement but also in perpendicular directions with sufficient width. This asymmetric extension creates an overlapping buffer zone that compensates for positioning errors, allowing less stringent control over pattern forming positions while ensuring reliable connections.
3Ease of manufacture
If a simple parallel line pattern is used for radio-wave transmission, then ease of manufacture is improved, but pattern freedom and design flexibility are limited
Solution Approach 1:
The patent applies segmentation by dividing the pattern into two distinct functional elements: simple linear portions for radio-wave transmission and connection portions for ensuring continuity. This segmentation allows the main pattern to remain simple for ease of manufacture, while the connection portions provide the necessary geometric flexibility for various design requirements without complicating the overall manufacturing process.
Solution Approach 2:
The patent implements universality by designing connection portions that serve multiple functions simultaneously: they connect adjacent patterns, compensate for positioning errors, and can be configured in various geometries to meet different design requirements. This multi-functional design allows a single pattern formation process to achieve both simplicity and design freedom.
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 solution enhances the reliability of pattern connection across multiple steps, ensuring high radio-wave transmissibility and preventing interruptions, thereby improving the overall performance and aesthetic quality of the heat-ray reflecting substrate.
Implementation Method 1
impart a function of reflecting heat rays (infrared rays) to windows
Implementation Method 2
partially removing a heat-ray reflecting film coating a substrate by laser etching
Data Source
AI summary
The present invention relates to a heat-ray reflecting substrate including: a dielectric substrate; and a heat-ray reflecting film formed on at least one main surface of the dielectric substrate, in which the heat-ray reflecting substrate has a radio-wave transmitting region in at least a part of the at least one main surface in a plan view, the radio-wave transmitting region includes a first repeating pattern formed of a slit portion, the first repeating pattern includes at least two first unit patterns extending along a first axis direction, each of the first unit patterns includes a first line portion extending in the first axis direction, and a first connection portion provided on at least one end portion of the first line portion and connected to another first unit pattern, and the first connection portion includes a portion extending in a second axis direction.


