DE-102025146204-A1 - Window glass for vehicle

DE102025146204A1DE 102025146204 A1DE102025146204 A1DE 102025146204A1DE-102025146204-A1

Abstract

A window glass for a vehicle comprises a glass pane, an antenna, and a sensor pattern, wherein the antenna comprises a feed terminal, an antenna pattern, a ground terminal, and a ground pattern, wherein the ground terminal is located below the feed terminal, the sensor pattern is located below the ground terminal, the ground pattern comprises a ground element extending below the ground terminal, the sensor pattern is located between a first horizontal line passing through a topmost section of the ground pattern and a second horizontal line passing through a bottommost section of the ground pattern, and is located between the ground element and a flange section in a body flange of the vehicle to which the glass pane is attached, and wherein the ground pattern has an open end located below a third horizontal line intersecting the ground element, the sensor pattern, and the flange section.

Inventors

Tsuyoshi Yamamoto
Satoshi Tokunaga

Assignees

AGC Inc.

Dates

Publication Date: 20260513
Application Date: 20251110
Priority Date: 20241113

Claims (20)

Window glass for a vehicle, comprising: a glass plate; an antenna attached to the glass plate; and a sensor pattern provided on the glass plate for detecting a break in the glass plate, wherein the antenna comprises a feed terminal for power supply, an antenna pattern electrically connected to the feed terminal, a ground terminal, and a ground pattern electrically connected to the ground terminal, the ground terminal is located below the feed terminal, the sensor pattern is located below the ground terminal, the ground pattern comprises a first ground element extending below the ground terminal, the sensor pattern is located between a first horizontal line passing through an uppermost section of the ground pattern and a second horizontal line passing through a lowermost section of the ground pattern, and is located between the first ground element and a first flange section nearest to the sensor pattern in a body flange of the vehicle to which the glass plate is attached, and the ground pattern comprises a first open end located below a third horizontal line connecting the first ground element, the sensor pattern, and the first flange section cuts.
Window glass for a vehicle according to Claim 1 , wherein the sensor pattern comprises a first terminal, a second terminal located below the first terminal, and a sensor element electrically connecting the first terminal and the second terminal, and the first open end is located below the third horizontal line intersecting the sensor pattern between the first terminal and the second terminal.
Window glass for a vehicle according to Claim 1 , where the shortest distance between the mass pattern and the sensor pattern is 25 mm or more.
Window glass for a vehicle according to Claim 1 , wherein the antenna receives a radio wave in a first frequency band, in a case where λ 1 is a wavelength of the radio wave in air at a center frequency of the first frequency band and k is a wavelength compression rate due to the glass plate, a length of the ground pattern from the ground terminal to the first open end is 0.5 × (λ 1 /2) × k or more and 1.2 × (λ 1 /2) × k or less.
Window glass for a vehicle according to Claim 4 , where the first frequency band is 174 MHz or more and 240 MHz or less.
Window glass for a vehicle according to Claim 1 , where the uppermost section is an uppermost section of the first mass element.
Window glass for a vehicle according to Claim 1 , where the lowest section is a lowest section of the first mass element.
Window glass for a vehicle according to Claim 1 , wherein the mass pattern comprises a second mass element extending on a side where the sensor pattern is arranged with respect to the first mass element, and the first open end is an open end of the second mass element.
Window glass for a vehicle according to Claim 1 , wherein the mass pattern comprises a second mass element extending on one side opposite a side on which the sensor pattern is arranged with respect to the first mass element, and the first open end is an open end of the second mass element.
Window glass for a vehicle according to Claim 1 , where the first open end is the lowest end of the mass pattern.
Window glass for a vehicle according to Claim 1 , wherein the ground pattern includes an L-shaped element that electrically connects the ground terminal and the first ground element.
Window glass for a vehicle according to Claim 1 , wherein the antenna receives a radio wave in a second frequency band, and in a case where λ 2 is a wavelength of the radio wave in air at a center frequency of the second frequency band and k is a wavelength compression rate due to the glass plate, a length of the antenna pattern from the feed terminal to a second open end of the antenna pattern is 0.7 × (λ 2 /4) × k or more and 1.8 × (λ 2 /2) × k or less.
Window glass for a vehicle according to Claim 12 , where the second frequency band is 473 MHz or more and 707 MHz or less.
Window glass for a vehicle according to Claim 1 , with the antenna receiving radio waves from both digital terrestrial television broadcasting and DAB-Band III.
Window glass for a vehicle according to Claim 1 , wherein the antenna pattern includes a first antenna element extending in a horizontal direction.
Window glass for a vehicle according to Claim 15 , wherein the antenna pattern includes an L-shaped element that electrically connects the feed point and the first antenna element.
Window glass for a vehicle according to Claim 1 , where the antenna pattern is arranged above the third horizontal line.
Window glass for a vehicle according to Claim 17 , where the antenna pattern is arranged above the first horizontal line.
Window glass for a vehicle according to Claim 1 , wherein the first horizontal line intersects the body flange at a first intersection point on a side where the sensor pattern is located with respect to the first mass element, and intersects the body flange at a fourth intersection point on a side opposite the side where the sensor pattern is located with respect to the first mass element, the second horizontal line intersects the body flange at a second intersection point on the side where the sensor pattern is located with respect to the first mass element, and intersects the body flange at a fifth intersection point on the side opposite the side where the sensor pattern is located with respect to the first mass element, the third horizontal line intersects the body flange at a third intersection point on the side where the sensor pattern is located with respect to the first mass element, and intersects the body flange at a sixth intersection point on the side opposite the side where the sensor pattern is located with respect to the first mass element, a horizontal distance between the fourth intersection point and the first mass element is longer than a horizontal distance between the first intersection point and the first mass element, a The horizontal distance between the fifth intersection point and the first mass element is longer than the horizontal distance between the second intersection point and the first mass element, and the horizontal distance between the sixth intersection point and the first mass element is longer than the horizontal distance between the third intersection point and the first mass element.
Window glass for a vehicle according to one of the Claims 1 until 19 , wherein the glass plate comprises a light-shielding layer including a first light-shielding region in which a light-shielding film is formed without gaps and a second light-shielding region in which the light-shielding film is formed sparsely, and in a case in which a region without the light-shielding layer is referred to as a transparency region, the antenna pattern or mass pattern comprises an element orthogonal to a first boundary line between the first light-shielding region and the second light-shielding region and to a second boundary line between the second light-shielding region and the transparency region.

Description

BACKGROUND OF THE INVENTION Field of invention of the digital terrestrial television broadcast wave The present disclosure relates to a window glass for a vehicle. Description of the state of the art In related prior art, a window glass plate for a vehicle is known in which an antenna pattern for wireless communication, for example for radio reception, and a sensor pattern for detecting damage to the glass plate are provided (see, for example, 6 from patent document 1). Citation list Patent documents Patent document 1: Japanese unexamined patent application, first publication, no. 2009-295109 SUMMARY OF THE INVENTION However, with state-of-the-art technology, there is a risk that noise or similar interference emitted by the sensor pattern used to detect a break in the glass plate could impair the antenna's reception performance. For example, even if a desired radio wave is being received, a situation could arise where sound is inaudible due to the radio wave, and only static is heard, or a situation could arise where a video is not displayed on a screen and cannot be viewed. The present disclosure provides for a window glass for a vehicle which is able to reduce the influence of the sensor pattern for detecting a break in the glass plate on the receiving performance of the antenna. A window glass for a vehicle according to a first aspect comprises a glass pane, an antenna provided on the glass pane, and a sensor pattern provided on the glass pane for detecting a breakage of the glass pane, wherein the antenna comprises a feed terminal for feeding, an antenna pattern electrically connected to the feed terminal, a ground terminal for grounding, and a ground pattern electrically connected to the ground terminal, wherein the ground terminal is located below the feed terminal, the sensor pattern is located below the ground terminal, the ground pattern comprises a first ground element extending below the ground terminal, the sensor pattern is located between a first horizontal line passing through an uppermost section of the ground pattern and a second horizontal line passing through a lowermost section of the ground pattern, and between the first ground element and a first flange section nearest to the sensor pattern in a body flange of the vehicle to which the glass pane is attached, and the ground pattern comprises a first open end located below a third horizontal line extending from the first ground element. Sensor pattern, and cuts through the first flange section. In the case of the window glass for a vehicle according to a second aspect, the sensor pattern for the window glass for a vehicle according to the first aspect may include a first connection, a second connection located below the first connection, and a sensor element that electrically connects the first connection and the second connection, and the first open end may be located below the third horizontal line that intersects the sensor pattern between the first connection and the second connection. For vehicle window glass according to a third aspect, for vehicle window glass according to the first or second aspect, the shortest distance between the mass pattern and the sensor pattern can be 25 mm or more. In the case of the window glass for a vehicle according to a fourth aspect, in the case of the window glass for a vehicle according to one of the first to third aspects, the antenna can receive a radio wave in a first frequency band, and in a case where λ 1 is a wavelength of the radio wave in air at a center frequency of the first frequency band and k is a wavelength compression rate due to the glass plate, the length of the ground pattern from the ground terminal to the first open end can be 0.5 × (λ 1 /2) × k or more and 1.2 × (λ 1 /2) × k or less. For the window glass for a vehicle according to a fifth aspect, the first frequency band can be 174 MHz or more and 240 MHz or less, according to the fourth aspect. When considering window glass for a vehicle, a sixth aspect can be considered, while considering window glass for a vehicle, one of the first to fifth aspects can be considered. Aspects of the top section are a top section of the first mass element. In the case of the window glass for a vehicle according to a seventh aspect, the lowest section can be a lowest section of the first mass element in the case of the window glass for a vehicle according to one of the first to sixth aspects. In the case of the window glass for a vehicle according to an eighth aspect, in the case of the window glass for a vehicle according to one of the first to seventh aspects, the mass pattern may include a second mass element that extends on a side where the sensor pattern is arranged with respect to the first mass element, and the first open end may be an open end of the second mass element. In the case of the window glass for a vehicle according to a ninth aspect, in the case of the window glass for a vehicle according to one of the first to seventh aspec