Window glass for vehicle and window glass device for vehicle

Abstract

The invention provides a window glass for a vehicle and a window glass device for the vehicle, which can guarantee the antenna gain of a VHF frequency band, consider both improvent of appearance and guarantee of view, and also have anti-fog effect. The window glass for vehicle includes a glass plate having a transmissive region transmitting visible light, and a light shielding film shielding visible light; a dielectric having a first surface and a second surface; a planar conductor arranged between the glass plate and the first surface of the dielectric; positive and negative electrodes connected to the planar conductor; one or more feeding electrodes and one or more grounding electrodes arranged on the second surface of the dielectric. The planar conductor generates heat by an electric voltage applied between the positive and negative electrodes. The feeding electrodes and the grounding electrodes are arranged to face the planar conductor via the dielectric so that the planar conductor receives at least electromagnetic waves of a VHF band. The positive electrode, the negative electrode, the feeding electrodes and the grounding electrodes are arranged to overlap with the light shielding film in a planar view.

Description

technical field [0001] The present invention relates to a window glass for a vehicle and a window glass device for a vehicle. Background technique [0002] Antennas for various purposes in different frequency bands such as AM broadcasting, FM broadcasting, DAB (Digital Audio Broadcast), remote keyless entry, digital TV broadcasting, 4G communication, etc., are required to be placed on the window glass of an automobile. However, since the space of the window glass for automobiles is limited, the structure of the antenna may be complicated and the appearance of the antenna may be deteriorated. On the other hand, in automotive window glasses (particularly, rear windshields), there is a technique of heating a transparent or translucent conductive film to prevent ice and fog on the window glass. When a conductive film is used for anti-fogging of window glass, etc., there is an advantage of improving visibility and appearance compared to the case of using a plurality of heating w...

AI Technical Summary

Problems solved by technology

In addition, if the area of ​​the black coating is enlarged to hide the antenna lines, there is a trade-off that the appearance is improved but the field of vision inside the black coating is narrow.

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