Window glass heating device

A dual-heater system on vehicle windows optimizes heat distribution and visibility by controlling heat output based on temperature and user inputs, addressing inefficiencies in existing systems.

DE102009009266B4Active Publication Date: 2025-07-31SUBARU CORP
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Patent Information

Application Number
DE102009009266
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Priority Date
2008-02-19
Filing Date
2009-02-17
Publication Date
2025-07-31
Estimated Expiration
2029-02-17

AI Technical Summary

Technical Problem

Existing window glass heating systems for vehicles struggle to provide appropriate heat distribution and visibility, particularly in areas prone to ice and snow accumulation, leading to impaired driver vision and inefficient energy use.

Method used

A dual-heater system comprising a first heater on the entire window surface and a second heater near critical areas like A-pillars and wiper rest positions, with independent control of heat output based on temperature and user inputs, ensuring optimal heating and visibility.

Benefits of technology

Effectively melts ice and snow in critical areas while maintaining clear visibility and reducing energy consumption, enhancing driver comfort and safety without complex operations.

✦ Generated by Eureka AI based on patent content.

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Abstract

Window glass heating device (1, 101) comprising:a first heating device (20) with a transparent or semi-transparent first heating film (21, 122, 123) which is fastened in an area which includes a central area of a window glass (10, 110) of a motor vehicle;a second heating device (30) with a transparent or semi-transparent second heating film (31, 121, 124) which is fastened in a partial area of the window glass of the motor vehicle; and a heating control device (60, 131) for controlling the amount of heat in the first and second heating devices, wherein the window glass is a laminated glass having an outer glass (12) and an inner glass (11) arranged in an overlapping manner; wherein the first heating device (20) is fixed to substantially the entire surface on a vehicle outer side of the inner glass (11), wherein the second heating device (30) is fixed to a surface on the vehicle inner side of the outer glass (12), in areas,which correspond to the lower portion and the right and left end portions of the first heater (20), overlapped and formed substantially U-shaped, wherein a non-conductive transparent film (13) is arranged between the first heater (20) and the second heater (30), and wherein the heater control device (60) controls the heat quantity of the first heater (20) and the second heater (30) based on information concerning a vehicle outside temperature, information concerning on / off switching states of an anti-fogging device switch and a windshield wiper defrosting device switch, and on / off switching states of a windshield wiper switch.
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Claims

[1] Window glass heating device (1, 101) with: a first heating device (20) having a transparent or semi-transparent first heating film (21, 122, 123) fixed in a region including a central region of a window glass (10, 110) of a motor vehicle; a second heating device (30) with a transparent or semi-transparent second heating film (31, 121, 124) which is attached in a partial area of the window glass of the motor vehicle; and a heating control device (60, 131) for controlling the amount of heat in the first and second heating devices, wherein the window glass is a laminated glass having an outer glass (12) and an inner glass (11) arranged to overlap; wherein the first heating device (20) is attached to substantially the entire surface on a vehicle outer side of the inner glass (11), wherein the second heating device (30) is attached to a surface on the vehicle interior side of the outer glass (12), overlapped in areas corresponding to the lower portion and the right and left end portions of the first heating device (20), and formed substantially U-shaped, wherein a non-conductive transparent film (13) is arranged between the first heating device (20) and the second heating device (30), and wherein the heating control device (60) controls the heat quantity of the first heating device (20) and the second heating device (30) based on information concerning a vehicle outside temperature, concerning information of on / off switching states of an anti-fogging device switch and a windshield wiper defrosting device switch, and concerning on / off switching states of a windshield wiper switch. [2] Window glass heating device according to claim 1, wherein the heating control device (60) is arranged to: causing the first heating device (20) to generate heat when the defogging device switch is turned on; Causing the second heating device (30) to generate heat when the windshield wiper defroster switch is switched on; and Causing the first heater (20) and the second heater (30) to generate heat when the windshield wiper switch is on and the vehicle exterior temperature is lower than 2 degrees Celsius.

Citation Information

Patent Citations

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    DE10120098A1

  • heated disc with an electrically conductive surface coating

    DE10160806A1

  • Laminated glass pane for use on building walls, has two glass panes with one pane having cutout part in connecting region, through which connectors are passed and brought into contact with two coatings of panes

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