CONTROL APPARATUS FOR CONTROLLING LIGHT EMISSION OF VEHICLE HEADLIGHT, AND HEADLIGHT SYSTEM PROVIDED WITH THE CONTROL APPARATUS
First Claim
1. An antenna apparatus comprising;
- a dielectric substrate having two faces, in which a ground plate is formed on one substrate face of the two faces;
a patch antenna provided with at least a single patch radiating element for power supply, the patch radiating element being formed on the other substrate face of the dielectric substrate, the other substrate face being opposite to the one substrate face on which the ground plate is formed, a predetermined direction on the substrate face of the dielectric substrate being set as a dominant polarized wave direction; and
a plurality of conductive structures provided with a patch-shaped conductor pattern formed on a substrate surface, which is the other substrate face, and a connecting conductor formed to pass through the dielectric substrate between the conductor pattern and the ground plate in order to electrically connect the conductor pattern and the ground plate,wherein the plurality of conductive structures are arranged such that a structure absent region is formed on the substrate surface by the conductive structures, the structure absent region completely including the patch radiating element of the patch antenna and excluding the conductor pattern of the conductive structure from the structure absent region; and
when a line perpendicular to the dominant polarized wave direction and pasting through substantially a center of the patch antenna in the dominant polarized wave direction is set as a patch line, the structure absent region is formed by the plurality of conductive structures such that, in both an area further towards one end side of the dielectric substrate than the patch line and an area further towards the other end side of the dielectric substrate than the patch line, an absent distance changes into a plurality of types depending on the position on the patch line, the absent distance referring to the distance in the dominant polarized wave direction from an arbitrary position on the patch line to the conductor pattern forming the boundary of the structure absent region.
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Accused Products
Abstract
A control apparatus, which controls a headlight unit, repeatedly performs a process of measuring brightness ahead of the own vehicle using a luminance sensor. For example, when a curved road region is present ahead of the own vehicle, measurement is made of the brightness of a road surface or a guardrail of a specified region (region to which light from a headlight unit of a forward vehicle is emitted) in the road region. Then, a variation Δ in a measurement value of the brightness from a previous measurement value is calculated. When the variation Δ is equal to or more than a threshold TH, a vehicle yet to emerge is predicted to emerge in a forward view of the own vehicle to thereby switch a lighting mode for the light emitted from the headlight unit to another mode so that the emergence area is darkened.
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Citations
17 Claims
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1. An antenna apparatus comprising;
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a dielectric substrate having two faces, in which a ground plate is formed on one substrate face of the two faces; a patch antenna provided with at least a single patch radiating element for power supply, the patch radiating element being formed on the other substrate face of the dielectric substrate, the other substrate face being opposite to the one substrate face on which the ground plate is formed, a predetermined direction on the substrate face of the dielectric substrate being set as a dominant polarized wave direction; and a plurality of conductive structures provided with a patch-shaped conductor pattern formed on a substrate surface, which is the other substrate face, and a connecting conductor formed to pass through the dielectric substrate between the conductor pattern and the ground plate in order to electrically connect the conductor pattern and the ground plate, wherein the plurality of conductive structures are arranged such that a structure absent region is formed on the substrate surface by the conductive structures, the structure absent region completely including the patch radiating element of the patch antenna and excluding the conductor pattern of the conductive structure from the structure absent region; and when a line perpendicular to the dominant polarized wave direction and pasting through substantially a center of the patch antenna in the dominant polarized wave direction is set as a patch line, the structure absent region is formed by the plurality of conductive structures such that, in both an area further towards one end side of the dielectric substrate than the patch line and an area further towards the other end side of the dielectric substrate than the patch line, an absent distance changes into a plurality of types depending on the position on the patch line, the absent distance referring to the distance in the dominant polarized wave direction from an arbitrary position on the patch line to the conductor pattern forming the boundary of the structure absent region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification