Abstract: A self-light emitting device in a tiling scheme includes an array of a plurality of self-light emitting units. Each of the self-light emitting units is partitioned into a plurality of unit regions, and each of the unit regions includes at least one light emitting cell each including one or more self-light emitting elements. A central portion and an outer edge portion of each self-light emitting unit differ in number or positions of one or more light emitting cells in each unit region.

Abstract: A body sheet for a vapor chamber includes a first body surface, a second body surface disposed opposite to the first body surface, and a penetration space extending from the first body surface to the second body surface. The penetration space extends in a first direction in plan view. As seen in a cross section perpendicular to the first direction, the penetration space includes a first opening positioned on the first body surface and a second opening positioned on the second body surface. The second opening extends from a region overlapping with the first opening in plan view to a position overlapping with the first groove in plan view.

Abstract: A piezoelectric bulk wave device includes a support including a support substrate, a piezoelectric layer including a first main surface on the support side and a second main surface opposite from the first main surface, and at least one functional electrode including at least a portion on at least one of the first and second main surfaces. The at least one functional electrode is supported by the support and includes a functional electrode including a portion on the first main surface of the piezoelectric layer. A cavity portion is provided in the support and superposed on a portion of the functional electrode and an entirety or substantially an entirety of the piezoelectric layer in plan view. The piezoelectric layer is supported by the functional electrode supported by the support.

Abstract: A piezoelectric bulk wave device includes a support including a support substrate, a piezoelectric layer on the support and including first and second principal surfaces, an IDT electrode on the first principal surface and including a pair of comb-shaped electrodes each including electrode fingers and a busbar connecting the electrode fingers, and a frequency adjustment film on the second principal surface and overlapping at least a portion of the IDT electrode. The support includes a hollow portion overlapping at least a portion of the IDT electrode. d/p is less than or equal to about 0.5. Via holes are provided to the piezoelectric layer and the frequency adjustment film. Wiring electrodes are provided in the via holes and on the frequency adjustment film and electrically connected to the busbars of the comb-shaped electrodes.

Abstract: An acoustic wave device includes a first layer including a support substrate, a second layer on the first layer and including a piezoelectric film, and a first excitation electrode on the second layer. A cavity is between the first and second layers, and the first excitation electrode at least partially overlaps the cavity in a stacking direction of the first and second layers. A surface roughness of a major surface of the first layer facing the cavity is different from a surface roughness of a major surface of the second layer facing the cavity.

Abstract: An acoustic wave device includes a support substrate with a thickness in a first direction, a piezoelectric layer above or below the support substrate, and a functional electrode on the piezoelectric layer. A space is between the support substrate and the piezoelectric layer to least partially overlap the functional electrode in a plan view in the first direction. At least one through-hole extends through the piezoelectric layer, communicates with the space, and is inside an outer edge of the space in a plan view in the first direction.

Abstract: An acoustic wave device includes a support substrate with a thickness in a first direction, a piezoelectric layer above or below the support substrate, a functional electrode on or above the piezoelectric layer, and a stress-relaxing layer. In a plan view in the first direction, a hollow portion at least partly overlaps the functional electrode between the support substrate and the piezoelectric layer, and the stress-relaxing layer overlaps an outer edge of the hollow portion. Alternatively, in a plan view in the first direction, the stress-relaxing layer is outside at least a portion of the outer edge of the hollow portion and is interposed between the support substrate and the piezoelectric layer.

Abstract: An acoustic wave device includes a support, a piezoelectric layer, a first resonator including a first portion of the piezoelectric layer and a first functional electrode in the first portion of the piezoelectric layer, and a second resonator including a second portion of the piezoelectric layer and a second functional electrode in the second portion of the piezoelectric layer. A first hollow portion in the support overlaps the first resonator, and a second hollow portion in the support overlaps the second resonator. At least one first through-hole penetrates the piezoelectric layer and communicates with the first hollow portion, and at least one second through-hole penetrates the piezoelectric layer and communicates with the second hollow portion. A volume and a total opening area of the first hollow portion are larger than those of the second hollow portion.

Abstract: An acoustic wave device includes a piezoelectric layer, electrodes, a support substrate, a first cover section and a first support section. As viewed in a stacking direction of the support substrate and the piezoelectric layer, at least a portion of each of first and second functional electrodes overlaps a hollow portion. As viewed in the stacking direction, the first cover section overlaps the first and second functional electrodes and first and second wiring electrodes. As viewed in the stacking direction of the support substrate and the piezoelectric layer, at least a portion of a first relay electrode overlaps at least one of the first and second functional electrodes.

Abstract: An acoustic wave device includes a piezoelectric layer including a first major surface and a second major surface facing each other, a functional electrode on at least one of the first major surface and the second major surface of the piezoelectric layer, and a support substrate laminated on the second major surface side of the piezoelectric layer. An air gap is provided between the support substrate and the piezoelectric layer. At least a portion of the functional electrode overlaps the air gap as seen in a lamination direction of the support substrate and the piezoelectric layer. A through-hole penetrates the piezoelectric layer and reaches the air gap. A protrusion is provided in a region of an outer edge of the through-hole in the first major surface of the piezoelectric layer and is more protruded than a region where the through-hole is not provided.

Abstract: An acoustic wave device includes a support substrate with a thickness in a first direction, an intermediate layer on the support substrate, a piezoelectric layer adjacent to the support substrate in the first direction, and a functional electrode on the piezoelectric layer. A cavity is provided in the intermediate layer. The intermediate layer includes a first portion and a second portion. The first portion is closer to the cavity than the second portion. The first portion or the second portion is modified.

Abstract: An acoustic wave device includes a support including a support substrate and an intermediate layer, a piezoelectric layer on or over the intermediate layer and including a through-hole, a functional electrode on the piezoelectric layer, and a hollow portion in the support substrate and the intermediate layer. At least a portion of the functional electrode overlaps the hollow portion. The hollow portion includes first and second hollow regions, the first hollow region being located in the intermediate layer and communicating with the through-hole, the second hollow region being located between the first hollow region and a bottom surface of a recess in the support substrate, the recess opening toward the first hollow region. The intermediate layer includes a portion protruding inward from a peripheral portion of the recess in the support substrate as viewed from a cross section in a thickness direction of the support.

Abstract: An acoustic wave device includes a support including a support substrate with a thickness in a first direction, a piezoelectric layer on the support in the first direction, and resonators each including a functional electrode on the piezoelectric layer in the first direction. The support includes first and second space portions at positions where the respective resonators at least partially overlap in plan view in the first direction, the second space portion with an area larger than an area of the first space portion in plan view in the first direction. The piezoelectric layer includes first and second through-holes respectively communicating with the first and second space portions, and the first through-hole has an area larger than an area of the second through-hole in plan view in the first direction.

Abstract: An acoustic wave device includes a piezoelectric layer that includes a first main surface and a second main surface opposite to the first main surface, a functional electrode on the piezoelectric layer, and a support on the second main surface of the piezoelectric layer and including a support substrate. The support includes a hollow portion overlapping at least a portion of the functional electrode in plan view in a lamination direction of the support and the piezoelectric layer. A through hole communicating with the hollow portion is provided in the piezoelectric layer. The first main surface of the piezoelectric layer includes a reinforcing lid portion to close the through hole.

Abstract: An information providing method is performed in an information providing system. The information providing method includes: acquiring pieces of speed information of a vehicle in association with identification information of an in-vehicle device from the in-vehicle device via roadside antennas, each of the pieces of speed information having been stored in the in-vehicle device each time the vehicle moves a prescribed distance before the vehicle passes by the roadside antennas; and causing an information display device to display evaluation information in association with the identification information, the evaluation information indicating a frequency of occurrence of sudden acceleration or deceleration events of the vehicle obtained from a proportion of differences between calculation values outside a threshold range, the calculation values being calculated on the basis of the pieces of speed information in a prescribed period corresponding to the pieces of speed information stored in the in-vehicle device.

Abstract: An acoustic wave device includes a first substrate, a piezoelectric layer adjacent to a first principal surface of the first substrate, a functional electrode on the piezoelectric layer, a second substrate, and a third substrate. The second substrate is adjacent to the first principal surface of the first substrate and faces the first substrate, with a second hollow interposed therebetween. The third substrate is adjacent to a second principal surface of the first substrate and faces the first substrate, with a first hollow interposed therebetween. The acoustic wave device includes a first support portion between the first principal surface of the first substrate and the second substrate, and a second support portion between the first substrate and the third substrate.

Abstract: An acoustic wave device includes a piezoelectric layer, a support substrate, at least a first and a second functional electrode and a wiring electrode connected to each of the functional electrodes. The wiring electrode includes one or more first wiring electrodes connected to the first and second functional electrodes. A cavity portion is located between the support substrate and the piezoelectric layer. An entirety of the first functional electrode and an entirety of a first wiring electrode connected to the first functional electrode are located on at least one of the first main surface and the second main surface of the piezoelectric layer in an overlapping manner with the cavity portion when viewed from a laminating direction of the support substrate and the piezoelectric layer.

Abstract: An acoustic wave device includes a piezoelectric layer including first and second main surfaces opposed to each other, a functional electrode on at least one of the first and second main surfaces, and a support substrate on a second main surface side of the piezoelectric layer. A hollow portion is between the support substrate and the piezoelectric layer. The functional electrode at least partially overlaps the hollow portion when viewed in a laminating direction in which the support substrate and the piezoelectric layer are laminated. A through-hole extends through the piezoelectric layer to the hollow portion. A raised portion extending along a depth direction of the through-hole is on an inner wall of the through-hole.

Abstract: An acoustic wave device is provided that includes a support substrate, a piezoelectric layer on the support substrate, a first electrode and a second electrode on the piezoelectric layer in a lamination direction of the support substrate and the piezoelectric layer, the first and the second electrodes are opposed in a first direction that intersects with the lamination direction; and a space that defines either a cavity in a portion of the support substrate or an air gap between the support substrate and the piezoelectric layer. A portion of each of the first and the second electrodes overlaps the space in a plan view in the lamination direction. A first roughness of a major surface of the support substrate, opposite from the piezoelectric layer, is greater than a second roughness of a major surface of the piezoelectric layer on which the first and second electrodes are located.

Abstract: An acoustic wave device includes a support substrate having a thickness in a first direction, a piezoelectric layer extending in the first direction of the support substrate, and an interdigital transducer electrode extending in the first direction of the piezoelectric layer and including first electrode fingers and second electrode fingers. The first electrode fingers extend in a second direction orthogonal to the first direction, and the second electrode fingers extend in the second direction and face corresponding ones of the first electrode fingers in a third direction orthogonal to the first and second directions. The support substrate has a recess on a side adjacent to the piezoelectric layer and at a position at least partially overlapping the interdigital transducer electrode in plan view in the first direction. A filling made of a material different from a material of the support substrate is included in a portion of the recess.