CN112005434B - Windshield with glass antenna element - Google Patents
Windshield with glass antenna element Download PDFInfo
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- CN112005434B CN112005434B CN201980025639.6A CN201980025639A CN112005434B CN 112005434 B CN112005434 B CN 112005434B CN 201980025639 A CN201980025639 A CN 201980025639A CN 112005434 B CN112005434 B CN 112005434B
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- windshield
- antenna element
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- visible light
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
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Abstract
The present invention provides windshields with glass antenna elements that replace film antennas. A windshield (1) according to an embodiment of the present invention comprises: a glass plate (2); a band-shaped visible light shielding region (3) formed at the peripheral edge of the windshield (1); a joint structure formed by an adhesive unit (4) that joins a side region (31) of the visible light shielding region (3) on the side of the end surface (21) of the glass plate (2) to a vehicle body flange (5); and a glass antenna element formed on the visible light shielding region (3), wherein a central region (32) of the joint structure and the visible light shielding region (3) is covered by the interior wall (6), the central region (32) is located between a side region (33) of the visible light shielding region (3) on the opposite side of the side region (31) and the side region (31), and the antenna element is disposed at least on the central region (32).
Description
Technical Field
The present invention relates to a technique of using a windshield provided as a fixed window of a vehicle as an antenna element without using an antenna film for post-mounting.
Background
Among various devices and apparatuses incorporated in a vehicle, there are various devices and apparatuses installed in a vehicle sales outlet or a factory, or various devices and apparatuses installed in an automobile product sales outlet or the like, according to the wishes of a vehicle purchaser, like an automobile manufacturer original option or a dealer option. Radio wave receiving devices for receiving radio waves such as terrestrial digital broadcasting waves, GPS, DAB, and the like are also installed in a vehicle sales outlet, an automobile product sales outlet, or the like. In the case of mounting the radio wave receiving device to a vehicle by such post-mounting, as shown in patent documents 1 and 2, a plastic film having a glass antenna element formed thereon is stuck to a windshield in a visible range. Since the windshield is provided as a fixed window of the vehicle, the glass antenna element has to be in a state in which all the antenna elements can be seen when the glass antenna element is attached, as shown in fig. 4 and 5.
On the other hand, instead of the aforementioned post-attachment, a radio wave receiving device may be provided as a standard in a vehicle. In this case, the following glass assembly is provided to the vehicle: an antenna element and a connector for engaging the antenna element with a device are formed in the glass assembly. At this time, the power feeding portion of the antenna element to which the connector is connected is designed to be located at a position covered by an interior wall called a trim (japanese) of the vehicle. Therefore, most of the antenna element is necessarily disposed in a band-shaped visible light shielding region composed of a black ceramic shielding film or the like. In such a structure, as described in patent document 3, when viewed from the side of the window glass closer to the outside of the vehicle, all or part of the antenna element is not visible from the outside of the vehicle, and the window glass is excellent in design.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2005-109811
Patent document 2: japanese patent laid-open No. 2007-104142
Patent document 3: japanese patent laid-open publication No. 2017-005711
Disclosure of Invention
Problems to be solved by the invention
The following problem arises in the case where the radio wave receiving device is mounted to the vehicle after the windshield is provided as a fixed window of the vehicle (this is referred to as a "rear mounting mode"). In a conventional method of attaching a film-like antenna element to a windshield glass provided as a fixed window of a vehicle, the entire connector and the glass antenna element are visible. Therefore, the antenna element has to be of a simple and compact structure from an aesthetic point of view. In this case, it is difficult to improve the reception sensitivity of the antenna element. When the radio wave receiving device is mounted on a vehicle by the rear mounting method, it can be said that the degree of freedom of design of the antenna element related to the reception sensitivity of the antenna element and the beauty of the antenna element are in a trade-off relationship.
The invention provides a windshield glass, which comprises the following components: in a windshield glass having a glass antenna element using a rear mounting method, it is easy to increase the degree of freedom in designing the antenna element in relation to the reception sensitivity of the antenna element, and to improve the aesthetic appearance of the antenna element together.
Solution for solving the problem
The windshield (1) is provided as a fixed window of a vehicle having an inner decorative wall (6) in a cabin space,
the windshield (1) has:
a glass plate (2);
a visible light shielding region (3) formed in a band-like shape on a peripheral edge portion of the windshield (1), the visible light shielding region (3) having a 1 st side region (31) on the side of an end surface (21) of the glass sheet (2), a 2 nd side region (33) on the opposite side of the 1 st side region (31), and a central region (32) located between the 1 st side region (31) and the 2 nd side region (33);
a joint structure formed by an adhesive unit (4) for joining the 1 st side region (31) and a vehicle body flange (5); and
a glass antenna element formed on the visible light shielding region (3),
the joint formation and the central region (32) are covered by the inner decorative wall (6),
the glass antenna element has a power supply part (10) made of conductive material and an antenna element made of conductive material connected to the power supply part (10),
the power supply unit (10) is disposed in the 2 nd side region (33),
the antenna element is arranged at least on the central region (32).
Since the power supply portion (10) is located in the 2 nd side region (33), a connector (8) can be mounted in a state where the windshield (1) is provided as a fixed window of a vehicle. The windshield (1) can be a component of a radio wave receiving device by means of the connector (8). The antenna element is disposed not only in the 2 nd side region (33) but also in the center region (32). In the conventional rear mounting method, an antenna element such as a film antenna is mounted on a windshield glass which is fixed to a vehicle as a window, and therefore, the center region (32) is not used. The present invention is completed by using the new concept of the central region (32), and therefore, the present invention can be configured as follows: the degree of freedom of design of the antenna element related to the reception sensitivity of the antenna element can be increased, and the aesthetic appearance of the antenna element can be easily improved.
The present invention also provides a method for using the radio wave receiver, wherein,
the method comprises the following steps:
a step (A) in which the windshield (1) is prepared; and
and a step (B) in which the power supply unit (10) is joined to a connector (8) and the glass antenna element is electrically joined to a wiring (9) that passes through a space (7) between the inner wall (6) and the central region (32).
ADVANTAGEOUS EFFECTS OF INVENTION
In a rear mounting mode in which the electric wave receiving device is mounted to a vehicle after the windshield is provided as a fixed window of the vehicle, the windshield of the present invention has the following effects: the degree of freedom in designing the antenna element with respect to the reception sensitivity of the antenna element can be increased, and the aesthetic appearance of the antenna element can be easily improved.
Drawings
Fig. 1 is a view schematically showing a cross section of a main portion of a windshield (1) of the present invention.
Fig. 2 is a view schematically illustrating a main part of the windshield (1) of the present invention when viewed from the outside of the vehicle cabin.
Fig. 3 is a view schematically illustrating a main part of the windshield (1) of the present invention when viewed from the vehicle cabin interior side.
Fig. 4 is a diagram schematically illustrating a main part of a windshield (1') of a conventional example when viewed from the outside of a vehicle cabin.
Fig. 5 is a diagram schematically illustrating a main part of a windshield (1') of a conventional example when viewed from the inside of a vehicle cabin.
Fig. 6 is a diagram illustrating a method of defining an area occupied by a glass antenna element.
Fig. 7 is a graph showing the antenna reception sensitivity according to the embodiment of the present invention.
Fig. 8 is a diagram schematically illustrating a main part of the windshield glass (1) when viewed from the cabin interior side in the technical scheme of the case where all the glass antenna elements are disposed on the visible light shielding region 3.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings. Fig. 1 is a schematic cross-sectional view of a main portion of a windshield 1 according to the present invention, fig. 2 is a schematic view of a main portion of a windshield 1 according to the present invention when the windshield 1 is viewed from the outside of a vehicle cabin, and fig. 3 is a schematic view of a main portion of a windshield 1 according to the present invention when the windshield 1 is viewed from the inside of a vehicle cabin. Fig. 4 is a diagram schematically illustrating a main portion of the conventional example windshield 1 'when the vehicle cabin is viewed from the outside, and fig. 5 is a diagram schematically illustrating a main portion of the conventional example windshield 1' when the vehicle cabin is viewed from the inside.
A typical example of a windshield 1 of the present invention is shown in fig. 1, 2, and 3. The windshield 1 is provided as a stationary window of a vehicle having an interior wall 6 in a cabin space, and the windshield 1 has: a glass plate 2; a visible light shielding region 3 formed in a band shape on a peripheral edge portion of the windshield 1; a joining structure portion formed by an adhesive means 4, the adhesive means 4 joining a side portion 31 of the visible light shielding region 3 on the side of the end surface 21 of the glass plate 2 to the vehicle body flange 5; and a glass antenna element formed on the visible light shielding region 3, wherein a central region 32 of the joint structure and the visible light shielding region 3 is covered by the interior wall 6, the central region 32 is located between a side region 33 of the visible light shielding region 3 on the opposite side to the side region 31 and the side region 31, the glass antenna element has a power feeding portion 10 made of a conductive material and an antenna element made of a conductive material connected to the power feeding portion 10, the power feeding portion 10 is disposed in the side region 33, and the antenna element is disposed at least in the central region 32.
The visible light shielding region 3 is preferably composed of black ceramics. Typically, the visible light shielding region 3 is formed when a colored ceramic such as a pasty black ceramic is applied to the peripheral edge portion of the glass plate 2 in a band shape by screen printing or the like, and the glass plate 2 is subjected to bending processing by heat treatment. The windshield 1 is bonded to the vehicle body flange 5 when mounted on a vehicle. Therefore, the joint structure formed by the adhesive means 4 is provided at the peripheral edge of the glass plate 2. The windshield 1 has the visible light shielding region 3 at a peripheral edge portion thereof, so that the joint structure portion is not visible when the windshield 1 is viewed from the outside of the vehicle cabin.
In order to make the windshield glass 1 function as a radio wave receiving device, a connector 8 having a wiring 9 is joined to the power supply unit 10, and the wiring 9 and the glass antenna element are electrically joined via the connector 8. The wiring 9 passes through the space 7 between the central region 32 and the inner wall 6, and is connected to a ground plane, an amplifier, a radio receiver, a television receiver, other communication equipment, or the like (these are not shown). As the connector 8, a spring connector having a spring metal conduction portion and a frame made of plastic or the like covering the metal conduction portion is suitably used. The spring metal conduction portion is brought into contact with the power supply portion 10 to compress the spring metal conduction portion, and in this state, the frame is fixed to the windshield 1 by a double-sided tape, an adhesive, or the like, so that the connector 8 and the power supply portion 10 can be joined.
Consider the following case: the user of the vehicle determines whether or not to install the radio wave receiving device in the vehicle and to make it function as a sales form. In this case, it is preferable that the vendor consults the user of the vehicle and confirms whether or not the user wants to use the radio wave receiving device, and then the vendor connects the connector 8 having the wiring 9 to the power supply unit 10, and electrically connects the wiring 9 and the glass antenna element via the connector 8.
In the typical examples of fig. 1, 2, and 3, the glass antenna element has a core-side antenna element 11 and a ground-side antenna element 12. The core-side antenna element 11 is an element extending from the power feeding portion 10h, and the ground-side antenna element 12 is an element extending from the power feeding portion 10 a.
As shown in fig. 3, the windshield 1 of the present invention has an antenna element disposed in the central region 32. The antenna element disposed in the central region 32 is not visible to the vehicle user due to the inner wall 6, and therefore does not affect the aesthetic appearance of the windshield glass 1, and the shape or size of the antenna element in this region is preferably designed to improve the radio wave receiving sensitivity.
The antenna element is also arranged in the central region 32, so that the glass antenna element has an area covered by the inner decorative wall 6. The antenna element disposed in the central region 32 is preferably joined to the power supply unit 10 via the antenna element disposed in the side region 33. With such a structure, the power supply unit 10 can be arranged so as to be offset from the boundary between the side region 33 and the central region 32, and as a result, the connector 8 can be easily attached to the power supply unit 10. In addition, from the viewpoint of improving the receiving sensitivity of the glass antenna element, the antenna element may be disposed in the see-through region 22 inside the vehicle cabin of the glass plate 2.
The size of the glass antenna is described next. The region forming the largest area among the areas formed by connecting the power feeding portion forming the antenna element, the tip portion, the apex portion, and the circular arc portion of the antenna element located at the outermost case is defined as a region (B) of the glass antenna element. In the region (B), the region covered by the inner decorative wall is the region (a). For example, in the case of the glass antenna element shown in fig. 3, the region (B) is a region surrounded by a dotted line as shown in fig. 6. In fig. 6, the region (a) is a region above the dotted line in the region surrounded by the dotted line.
The windshield 1 is more aesthetically desirable as the ratio of the region (a) is increased, but when the ratio is excessively high, the amount of the antenna element closer to the vehicle body flange 5 increases. In view of these, regarding the ratio of the area of the region (a) to the area of the region (B), it is preferable that the region (a)/the region (B) be set to 15% to 30%, preferably 20% to 25%. In addition, the windshield glass 1 may be configured such that the antenna element is not disposed in the side region (31) facing the vehicle body flange, in consideration of an electric influence from the vehicle body flange 5. In view of the influence of electricity from the vehicle body flange 5, the shortest distance between the side region (31) and the portion closest to the side region (31) in the antenna element may be set to 5mm to 35mm.
As shown in the typical examples of fig. 1, 2, and 3, the glass antenna element having the core-wire-side antenna element 11, the ground-side antenna element 12, the core-wire-side antenna element 11 extending from the power supply portion 10h, and the ground-side antenna element 12 extending from the power supply portion 10a can be suitably used for radio wave reception such as terrestrial digital television broadcasting, DAB radio wave reception, GPS, 5G communication, and workshop communication.
In this glass antenna element, the core-side antenna element 11 is preferably configured as follows: has a line extending from the power supply portion 10h in a direction away from the vehicle body flange 5. With such a line, it is possible to prevent radio waves received by the core-side antenna element from leaking to the vehicle body flange 5, and to improve the reception sensitivity of the antenna. The lines may also be shaped as follows: the top ends of the linear lines extending perpendicularly or substantially perpendicularly to the side of the visible light shielding region 3 extend parallel or substantially parallel to the side of the visible light shielding region 3, thereby forming L-letter-shaped lines. The length of the line element is preferably αλ/4 (α is the shortening ratio of glass, and α=0.7) of the center wavelength of the frequency band of the radio wave to be received. As in the examples of fig. 2 and 3, the line extending in the direction away from the vehicle body flange 5 may be arranged on the visible light shielding region 3 and the see-through region 22 on the cabin inner side of the glass plate 2 from the viewpoint of improving the receiving sensitivity of the glass antenna element. In this case, according to the configuration of the present invention, the ratio of the elements disposed in the see-through region 22 can be minimized as necessary.
The ground-side antenna element 12 is preferably also disposed on the central region 32. In order to improve the reception sensitivity of the radio wave of the antenna element, the ground side antenna element 12 is preferably configured to be larger than the core side element 11. The larger configuration is a more easily visible configuration. By disposing the ground-side antenna element 12 on the central region 32, the visible region of the antenna element can be made small as a windshield.
The ground-side antenna element 12 may have a rectangular structure having a relatively good external shape, and the entire surface coating region 121 made of the conductive material may be provided in the structure. In the rectangular structure, the power supply unit 10a may be formed integrally with the whole surface coating region 121, or may be formed so as to be included in the whole surface coating region. For example, a band of 470MHz to 710MHz, which can be used as radio waves for terrestrial digital television broadcastingThe size of the whole surface coating region 121 does not greatly affect the receiving sensitivity, but the receiving sensitivity can be finely adjusted by adjusting the size of the whole surface coating region 121. In the case where the ground-side antenna element 12 has a rectangular structure, the area of the rectangular structure is preferably 1500mm when receiving radio waves in the 470MHz to 710MHz band 2 ～4000mm 2 Further preferably 2000mm 2 ～3500mm 2 。
In the typical examples of fig. 1, 2, and 3, the glass antenna element is formed in the upper side region of the windshield glass 1, but the glass antenna element may be formed in the side region or the lower side region of the windshield glass 1.
Next, a solution is considered in which all of the glass antenna elements are disposed on the visible light shielding region 3. This structure is preferable from the viewpoint of improving the appearance of the windshield 1 because it has no element disposed in the see-through region 22. In this case, the core-side antenna element 11 is also preferably provided with a line extending from the power feeding portion 10h in a direction away from the vehicle body flange 5, and with a line having an L-shape extending from the tip of the line in parallel or substantially parallel to the side of the visible light shielding region 3. However, since the length of the line extending in the direction away from the vehicle body flange 5 can only be made short in this embodiment, the effect of preventing the radio wave received by the core wire side antenna element from leaking to the vehicle body flange 5 may be slight. Accordingly, the windshield glass 1 is preferably configured to have a structure in which the ground-side antenna element 12 extends between the core-side antenna element 11 and the vehicle body flange 5 as shown in fig. 8. With such a structure, it is possible to easily prevent the radio wave received by the core-wire side antenna element from leaking to the vehicle body flange 5.
In this embodiment, the ground-side antenna element 12 may be provided to have a line extending toward the vehicle body flange 5. The ground-side antenna element 12 may have the following structure: the line element extends from the tip of the line between the core-wire side antenna element 11 and the vehicle body flange 5 in a preferably parallel relationship with the edge of the vehicle body flange 5. In the antenna element, it is preferable that the total length of the line element of the core-side antenna element 11 and the length of the line element of the ground-side antenna element 12 be adjusted to αλ (α is a shortening ratio of glass, α=0.7) which is the center wavelength of the frequency band of the radio wave to be received, from the viewpoint of adjusting the impedance. In this case, in order to prevent the electric fields generated in the respective line elements from canceling, it is preferable to make the lengths of the respective lines different, and for example, the length of the line element of the core wire side antenna element 11 may be 3/4 αλ and the length of the line element of the ground side antenna element 12 may be 1/4 αλ.
The technical scheme of the case where all the glass antenna elements are arranged on the visible light shielding region 3 as shown in fig. 8 can be suitably used for radio wave reception such as terrestrial digital television broadcasting, DAB radio wave reception, GPS, 5G communication, and workshop communication. In the case where all the glass antenna elements are disposed on the visible light shielding region 3, the antenna elements may be formed in a side region or a lower side region of the windshield glass 1.
The glass plate 2 used in the windshield 1 of the present invention uses a curved, trapezoidal or rectangular glass plate. The glass plate may be either a single-plate glass or a laminated glass, or may be either a tempered glass or a non-tempered glass. As the glass plate 2, a glass plate made of soda lime silicate glass, which is commonly used as a glass plate for vehicles and is manufactured by a float process as specified in ISO16293-1, may be used, and a colorless glass plate or a colored glass plate may be used.
As shown in fig. 1, a band-shaped visible light shielding region 3 formed at the peripheral edge of the windshield 1 is used, and the visible light shielding region 3 is formed on the inner surface side of the glass plate in the vehicle cabin. In the case where the glass plate 2 is a laminated glass, the visible light blocking region 3 may be formed on the inner surface side of the vehicle cabin as shown in fig. 1, or may be formed on the intermediate film surface of the laminated glass or on the main surface of any one of the glass plates facing the intermediate film. The visible light shielding region 3 can be obtained, for example, by the following method: a colored ceramic paste containing a coloring pigment such as a black pigment and glass frit is applied in a band shape to the peripheral edge of a glass plate by a screen printing method or the like, and fired in the vicinity of the softening point of the glass frit.
The width of the belt as the visible light shielding region 3 may be, for example, 40mm to 100mm, depending on the vehicle in which the windshield 1 is provided. In the visible light blocking area 3, the side areas 31, the central area 32, and the side areas 33 may be adjusted to be, for example, 35% to 50%, 20% to 35%, and the remainder, respectively.
On the side of the side region 31, a joint structure formed by the adhesive means 4 for joining the region 31 and the vehicle body flange 5 is formed. The adhesion means 4 may use a polyurethane adhesive or the like, and may use a primer for promoting adhesion between the adhesive and each member at each interface between the region 31 and the vehicle body flange 5. The vehicle body flange 5 is made of a metal such as a steel plate, and a thickness of 2mm to 5mm is preferably used. The inner wall 6 covering the joint structure and the central region 32 in the visible light shielding region 3 is made of a material such as polyurethane material having a thickness of about 2mm to 5mm, and the central region 32 is located between the side region 33 and the side region 31 on the opposite side of the visible light shielding region 3 from the side region 31. In addition, the glass antenna element can be obtained by the following method: the silver paste containing silver particles and glass frit is applied in a desired pattern by screen printing or the like, and fired around the softening point of the glass frit.
The present invention can use a windshield provided as a stationary window of a vehicle as an antenna element when a user of the vehicle decides to use the windshield as an electric wave receiving device.
Next, in order to explain the effects of the windshield 1 of the present invention, a conventional example of a windshield will be described. In a typical example of a conventional windshield, a windshield 1' shown in fig. 4 and 5 is used as an antenna for receiving radio waves of terrestrial digital broadcasting. The glass antenna element has a core wire side antenna element 11 and a ground side antenna element 12. The core-side antenna element 11 is an element extending from the power feeding portion 10h, and the ground-side antenna element 12 is an element extending from the power feeding portion 10 a.
In the conventional windshield 1', the film 13 on which the glass antenna element is formed is attached in a state where the side regions 31 and the central region 32 of the visible light shielding region 3 are covered with the inner decorative wall 6. In the conventional example, as shown in fig. 5, the film 13 is attached to an attachable region, that is, to a region of the windshield 1' not covered with the interior wall 6. Therefore, it is difficult to dispose the antenna element of the glass antenna element in the central region 32. All the antenna elements 11 and 12 are visible from the vehicle interior (as shown in fig. 4, the antenna element and the film 13 in the region of the see-through region 22 are visible from the vehicle exterior), and therefore the antenna elements have to be of a simple and compact structure from the viewpoint of the aesthetic appearance. Therefore, in the conventional example, it is difficult to improve the reception sensitivity of the antenna element.
Examples
An antenna element as shown in fig. 3 and a glass plate 2 having a black visible light shielding region 3 having a width of 45mm formed at the peripheral edge portion thereof were prepared. In the visible light shielding region 3, the width of the side region 31 was set to 25mm, the width of the center region 32 was set to 15mm, and the width of the side region 33 was set to 5mm. The side regions 31 face the vehicle body flange 5, and the side regions 31 and the center region 32 become regions covered by the interior wall 6.
In the antenna element, the feeding portion 10h of the core-side antenna element and the feeding portion 10a of the ground-side antenna element are disposed in a horizontal positional relationship with each other (in fig. 3, the direction of the side of the region 3 is set to be horizontal) in the side region 33. The power supply parts are square and 25mm in area 2 . The distance between the power feeding portion 10a and the power feeding portion 10h was set to 4mm, and the upper side of the power feeding portion 10a and the upper side of the power feeding portion 10h were set to a horizontal positional relationship, and the lower side of the power feeding portion 10a and the lower side of the power feeding portion 10h were set to a horizontal positional relationship, and the side of the power feeding portion 10a and the side of the power feeding portion 10h were set to a horizontal positional relationship, as seen in fig. 3Is a parallel positional relationship. The lower sides of the power feeding units 10a and 10h are positioned 15mm from the boundary between the visible light blocking area 3 and the see-through area 22.
The core-side antenna element 11 is constituted by a line extending downward from the power feeding portion 10h as viewed in fig. 3 and a line extending leftward from the tip of the line as viewed in fig. 3, and the length of the line extending downward is set to 20mm and the length of the line extending leftward is set to 75mm.
The ground-side antenna element 12 is formed in a rectangular body as shown in fig. 3, and has a structure including the power supply portion 10a inside the rectangular body. The power supply portion 10a is in contact with the left side and the lower side of the rectangular body as seen in fig. 3, the length of the rectangular body from the upper side of the power supply portion is 25mm, and the length of the rectangular body in the horizontal direction is 90mm (the 90mm also includes an amount corresponding to the length of the lower side of the power supply portion). The antenna element described above was used as example 1. Also, an example in which the entire area of the rectangular body is set as the entire surface coating area is taken as example 2. In embodiments 1 and 2, there is no large difference in the reception sensitivity in the frequency band of 470MHz to 710 MHz.
Next, based on example 2, an example was taken as example 3 in which the length of the longitudinal side (side in a perpendicular relation to the boundary between the visible light shielding region 3 and the see-through region 22) of the rectangular ground-side antenna element 12 having a structure in which the occupancy ratio between the power feeding unit 10a and the whole surface coating region 121 was 100% was set to 25mm, and an example was taken as example 4 in which the length was set to 5mm. In embodiment 2, embodiment 3, and embodiment 4, the positions of the lower sides of the rectangular ground-side antenna elements 12 (sides close to the boundary between the visible light shielding region 3 and the see-through region 22 among the sides in parallel relation to the boundary) are set to be the same. That is, in the above-described embodiments 2, 3, and 4, the ratio of the ground-side antenna elements 12 disposed in the central region 32 is the relationship of embodiment 2> embodiment 3> embodiment 4.
Fig. 7 shows the reception sensitivity of the antenna elements of examples 2, 3, and 4 in the frequency band of 70MHz to 710 MHz. From this, it is understood that the larger the area of the ground side antenna element 12 is, the better the reception sensitivity is.
In the present invention, it is understood that even if the area of the ground-side antenna element 12 is enlarged, most of the element can be disposed in a position that can be hidden in the interior wall 6, and therefore, a windshield glass having a good balance between the reception sensitivity of radio waves and the appearance can be provided. In addition, when considering the result, it is understood that when the ground side antenna element 12 has a rectangular structure, the area of the rectangular structure is preferably 1500mm when receiving radio waves in the frequency band of 470MHz to 710MHz 2 ～4000mm 2 Further preferably 2000mm 2 ～3500mm 2 。
Industrial applicability
The present invention can use a windshield provided as a stationary window of a vehicle as an antenna element when a user of the vehicle decides to use the windshield as an electric wave receiving device. Therefore, when a television, a radio, ETC, and a car navigation device are installed in a vehicle outlet, an automobile product outlet, or the like, the windshield can be used as a radio wave receiving device for these devices.
Description of the reference numerals
1. A windshield; 2. a glass plate; 3. a visible light shielding region; 4. an adhesive unit; 5. a vehicle body flange; 6. an interior wall; 7. the space between the central region 32 and the inner trim wall 6; 8. a connector; 9. wiring; 10. a power supply unit for the antenna element; 10h, a power supply part of the core wire side antenna element; 10a, a feeding portion of the ground side antenna element; 11. a core wire side antenna element; 12. a ground side antenna element; 121. coating the whole surface with a coating area; 13. a film adhered to the glass plate 2.
Claims (28)
1. A windshield is characterized in that,
the windshield is provided as a stationary window of a vehicle having an interior wall in a cabin space,
the windshield has:
a glass plate having a peripheral edge portion joined to a vehicle body flange;
a visible light shielding region formed in a band-like shape on a peripheral edge portion of the windshield, the visible light shielding region having a 1 st side region facing the vehicle body flange and covered with the inner wall, a 2 nd side region that is an opposite side to the 1 st side region and is not covered with the inner wall near an inner side of the windshield, and a central region between the 1 st side region and the 2 nd side region and is covered with the inner wall; and
a glass antenna element formed on the visible light shielding region,
the glass antenna element has a power supply portion and an antenna element each made of a conductive material,
the power supply unit is disposed in the 2 nd side region not covered by the inner decorative wall after being disposed on a vehicle having a windshield so as to be connectable to a connector having wiring,
at least a portion of the antenna element is disposed on the central region.
2. A windshield as recited in claim 1, wherein,
a portion of the antenna element is disposed on the central region, a portion is disposed on the 2 nd side region,
the antenna element disposed on the central region is joined to the power supply portion via the antenna element disposed on the 2 nd side region.
3. A windshield as recited in claim 1, wherein,
a portion of the antenna element is disposed on a see-through region inside the glass sheet compartment.
4. The windshield of claim 1, wherein the windshield is formed from a glass,
the antenna element is not disposed in the 1 st side region.
5. A windshield according to any one of claims 1 to 4, wherein,
the antenna element has a core-side antenna element and a ground-side antenna element,
the power feeding section has a power feeding section of the core-side antenna element and a power feeding section of the ground-side antenna element.
6. A windshield as recited in claim 5, wherein,
the core-side antenna element is not disposed on the central region.
7. A windshield as recited in claim 5, wherein,
the core-side antenna element has a line extending from the power supply portion in a direction away from a vehicle body flange.
8. A windshield as recited in claim 5, wherein,
the ground side antenna element is disposed on the central region.
9. A windshield as recited in claim 5, wherein,
the ground side antenna element is constituted by a rectangular configuration having an entire surface coating region constituted by the conductive material within the configuration.
10. A windshield as recited in claim 1, wherein,
the shortest distance between the part of the antenna element closest to the 1 st side area and the 1 st side area is 5 mm-35 mm.
11. A windshield as recited in claim 7, wherein,
the line is a linear line extending perpendicularly or substantially perpendicularly to the side of the visible light shielding region, and is a letter L-shaped line extending from the top end thereof in parallel or substantially parallel to the side of the visible light shielding region.
12. A windshield as recited in claim 7, wherein,
the length of the line is αλ/4 of the center wavelength of the frequency band of the radio wave to be received, where α is the shortening rate of the glass, and α=0.7.
13. A windshield as recited in claim 1, wherein,
the glass antenna element is formed in an upper side region of the windshield.
14. A windshield as recited in claim 1, wherein,
the glass antenna element is formed in a side region of the windshield.
15. A windshield as recited in claim 1, wherein,
the glass antenna element is formed in a lower side region of the windshield.
16. A windshield as recited in claim 1, wherein,
the glass antenna element is disposed entirely on the visible light shielding region.
17. The windshield of claim 16, wherein the windshield is formed from a glass substrate,
the antenna element has a core-side antenna element and a ground-side antenna element,
the power feeding section has a power feeding section of the core-side antenna element and a power feeding section of the ground-side antenna element.
18. The windshield of claim 17, wherein the windshield is formed from a glass substrate,
the core-wire-side antenna element has a line extending from a power feeding portion of the core-wire-side antenna element in a direction away from a vehicle body flange.
19. The windshield of claim 18, wherein the windshield is formed from a glass substrate,
the line is an L-shaped line of letters extending from the tip of the line extending in a direction away from the vehicle body flange in parallel or substantially parallel to the side of the visible light shielding region.
20. The windshield of claim 19, wherein the windshield is formed from a glass substrate,
the ground side antenna element has a configuration extending between the core side antenna element and the vehicle body flange.
21. The windshield of claim 17, wherein the windshield is formed from a glass substrate,
the ground side antenna element has a line extending from the power supply portion toward the vehicle body flange.
22. The windshield of claim 21, wherein the windshield is formed from a glass substrate,
the ground side antenna element has a strip element extending from a tip end of the strip in parallel with an edge portion of the vehicle body flange between the core wire side antenna element and the vehicle body flange.
23. The windshield of claim 17, wherein the windshield is formed from a glass substrate,
the total length of the core-side antenna element and the ground-side antenna element is αλ, which is the shortening ratio of glass, and α=0.7, which is the center wavelength of the frequency band of the radio wave to be received.
24. The windshield of claim 23, wherein the windshield is formed from a glass substrate,
the length of the core wire side antenna element is 3/4αλ, and the length of the ground side antenna element is 1/4αλ.
25. A windshield as recited in claim 1, wherein,
the width of the visible light shielding area is 40 mm-100 mm.
26. A windshield as recited in claim 1, wherein,
in the visible light shielding region, the 1 st side region, the central region, and the side region are 35 to 50%, 20 to 35%, and the remainder, respectively.
27. A method for using an electric wave receiving device is characterized in that,
the method comprises the following steps:
a step (a) of preparing the windshield according to any one of claims 1 to 26 in a state of being installed in a vehicle; and
and (B) bonding the power supply unit to the connector, and electrically bonding the glass antenna element to the wiring line passing through a space between the inner wall and the central region.
28. The method for using an electric wave receiving apparatus according to claim 27, wherein,
the step of confirming whether or not a user of the vehicle wishes to use the radio wave receiving device is included between the step (a) and the step (B).
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018077579 | 2018-04-13 | ||
| JP2018-077579 | 2018-04-13 | ||
| JP2018178222 | 2018-09-25 | ||
| JP2018-178222 | 2018-09-25 | ||
| PCT/JP2019/014572 WO2019198561A1 (en) | 2018-04-13 | 2019-04-02 | Windshield equipped with glass antenna element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112005434A CN112005434A (en) | 2020-11-27 |
| CN112005434B true CN112005434B (en) | 2023-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980025639.6A Active CN112005434B (en) | 2018-04-13 | 2019-04-02 | Windshield with glass antenna element |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7231851B2 (en) |
| CN (1) | CN112005434B (en) |
| WO (1) | WO2019198561A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112548361B (en) * | 2020-12-01 | 2023-06-27 | 上海致凯捷激光科技有限公司 | Laser processing method for 5G antenna glass mounting fixing seat |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01117106U (en) * | 1988-01-30 | 1989-08-08 | ||
| JP2004004010A (en) * | 2002-03-26 | 2004-01-08 | Citizen Watch Co Ltd | Radio controlled clock |
| JP2004072419A (en) * | 2002-08-06 | 2004-03-04 | Toyota Central Res & Dev Lab Inc | antenna |
| JP2005167619A (en) * | 2003-12-02 | 2005-06-23 | Toyota Motor Corp | Antenna device |
| JP2010158035A (en) * | 2010-01-29 | 2010-07-15 | Fujitsu Ltd | Glass antenna, and manufacturing method thereof |
| JP4913900B1 (en) * | 2010-12-08 | 2012-04-11 | 日本アンテナ株式会社 | Antenna device |
| JP2013026800A (en) * | 2011-07-20 | 2013-02-04 | Asahi Glass Co Ltd | Antenna apparatus |
| JP2014075649A (en) * | 2012-10-03 | 2014-04-24 | Kojima Press Industry Co Ltd | Antenna unit |
| WO2015133276A1 (en) * | 2014-03-04 | 2015-09-11 | 旭硝子株式会社 | Glass antenna and windowpane provided with antenna |
| JP2016220196A (en) * | 2015-05-22 | 2016-12-22 | 旭硝子株式会社 | Vehicle window glass and glass antenna |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008172626A (en) * | 2007-01-12 | 2008-07-24 | Mazda Motor Corp | Antenna |
| JP4948181B2 (en) * | 2007-01-12 | 2012-06-06 | 富士通テン株式会社 | ANTENNA, ANTENNA DEVICE, AND PROCESSING DEVICE PROVIDED WITH ANTENNA DEVICE |
| JP5446536B2 (en) * | 2008-09-12 | 2014-03-19 | セントラル硝子株式会社 | Glass antenna |
-
2019
- 2019-04-02 JP JP2020513210A patent/JP7231851B2/en active Active
- 2019-04-02 WO PCT/JP2019/014572 patent/WO2019198561A1/en active Application Filing
- 2019-04-02 CN CN201980025639.6A patent/CN112005434B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01117106U (en) * | 1988-01-30 | 1989-08-08 | ||
| JP2004004010A (en) * | 2002-03-26 | 2004-01-08 | Citizen Watch Co Ltd | Radio controlled clock |
| JP2004072419A (en) * | 2002-08-06 | 2004-03-04 | Toyota Central Res & Dev Lab Inc | antenna |
| JP2005167619A (en) * | 2003-12-02 | 2005-06-23 | Toyota Motor Corp | Antenna device |
| JP2010158035A (en) * | 2010-01-29 | 2010-07-15 | Fujitsu Ltd | Glass antenna, and manufacturing method thereof |
| JP4913900B1 (en) * | 2010-12-08 | 2012-04-11 | 日本アンテナ株式会社 | Antenna device |
| JP2013026800A (en) * | 2011-07-20 | 2013-02-04 | Asahi Glass Co Ltd | Antenna apparatus |
| JP2014075649A (en) * | 2012-10-03 | 2014-04-24 | Kojima Press Industry Co Ltd | Antenna unit |
| WO2015133276A1 (en) * | 2014-03-04 | 2015-09-11 | 旭硝子株式会社 | Glass antenna and windowpane provided with antenna |
| JP2016220196A (en) * | 2015-05-22 | 2016-12-22 | 旭硝子株式会社 | Vehicle window glass and glass antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7231851B2 (en) | 2023-03-02 |
| CN112005434A (en) | 2020-11-27 |
| JPWO2019198561A1 (en) | 2021-04-15 |
| WO2019198561A1 (en) | 2019-10-17 |
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