Coated Glazing With Laser-Patterned Deletions for Differential Heating
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Solution Overview
Problem
Existing heatable glazings require numerous busbars and electrical connections to achieve differential heating, which can be cumbersome and inefficient.
Innovation Solution
A heatable glazing with deletions in the coating that enclose non-deleted portions, allowing for localized heating by increasing resistance and using fewer busbars, achieved through laser abrasion or other physical means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If numerous busbars and electrical connections are used to achieve differential heating, then heating control precision is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by creating deletion regions with specific geometric patterns (circles, squares, triangles, or irregular shapes) at predetermined locations on the heating element. These deletion regions locally modify the electrical resistance to provide increased heating in specific areas such as wiper park areas and information acquisition areas, achieving differential heating without requiring separate busbars for each heated zone. The patterned deletions create localized high-resistance regions that generate additional heat where needed.
Solution Approach 2:
The patent changes the electrical resistance parameter by selectively deleting portions of the heating element to create deletion regions. This parameter change allows the same continuous heating element to provide both uniform heating (in non-deletion areas) and differential heating (in deletion regions with higher resistance). By controlling the size, shape, and distribution of deletion regions, the system achieves multiple heating zones with different power levels using a single electrical connection structure.
2Productivity
If deletion regions are created to provide differential heating, then heating efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The patent replaces complex mechanical manufacturing processes with a laser-based removal process. Instead of using multiple separate heating elements or complex masking techniques to create differential heating zones, the invention uses laser ablation to precisely remove material and create deletion regions in the heating element. This substitution of mechanical manufacturing with laser processing simplifies the overall manufacturing workflow while achieving the desired heating patterns.
Solution Approach 2:
The patent applies preliminary action by creating the deletion regions in the heating element before final assembly and installation. The deletion patterns are established during the heating element fabrication process, allowing the differential heating functionality to be built-in from the start. This preliminary creation of functional features eliminates the need for post-installation adjustments or complex assembly procedures.
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 efficient differential heating with reduced busbars and connections, enhancing deicing and defogging capabilities, particularly around wipers and information acquisition areas.
Implementation Method 1
a heatable coating formed on the first substrate, the heatable coating including at least one heatable layer
Implementation Method 2
The deletion may be formed by applying a laser to the heatable coating, which may induce abrasion of the heatable coating by laser beam application
Data Source
AI summary
A glazing includes a first substrate and a heatable coating formed on the first substrate, the heatable coating includes at least one heatable layer and at least one deletion, and multiple busbars for supplying power to the heatable coating are positioned on the heatable coating remote from the at least one deletion.