Abstract: A projector includes: a laser light source; a shaping section configured to shape a laser light emitted from the laser light source; and a scanning section configured to two-dimensionally scan, on a screen, a laser beam shaped by the shaping section. Under a situation where a distance from an optical emitting surface of the laser beam to the screen is constant, the laser light source and the shaping section are configured to perform two-dimensional scanning of the laser beam on the screen by using a tip of the laser beam corresponding to each of cross sections at a plurality of positions of a tapered portion of the laser beam from the scanning section to a beam waist of the laser beam.

Abstract: An information processing device includes: a reception unit that receives event information including an event indicating a driving status of a driver and driver information related to the driver, in one of commercial use and private use of a vehicle; a determination unit that uses a risk based on the event information to determine an insurance premium for the driver or for the vehicle identified by the driver information; and a transmission unit that transmits insurance premium information indicating the determined insurance premium to a processing terminal used by the driver.

Abstract: An aerial display device is mounted on a vehicle and displays information toward a driver seated in a driver seat of the vehicle. The aerial display device includes a display panel and a reflector array. The display panel including a display surface that emits images as light, the display panel being orientated such that the display surface faces toward the driver seat, the display surface including a screen display area and an aerial display area located next to the screen display area. The aerial display area is located at the upper edge portion of the display surface in an installed orientation. The screen display area is a part of the display surface located below the aerial display area. The reflector array forms the light emitted from the aerial display area as an aerial display image in midair above to the aerial display area.

Abstract: A projector includes: a laser light source; a shaping section configured to shape a laser light emitted from the laser light source; and a scanning section configured to two-dimensionally scan, on a screen, a laser beam shaped by the shaping section. Under a situation where a distance from an optical emitting surface of the laser beam to the screen is constant, the laser light source and the shaping section are configured to perform two-dimensional scanning of the laser beam on the screen by using a tip of the laser beam corresponding to each of cross sections at a plurality of positions of a tapered portion of the laser beam from the scanning section to a beam waist of the laser beam.

Abstract: A fuel cell system includes: a fuel cell that includes a cathode and an anode and generates electricity by reducing a mediator at the cathode; a regenerator that oxidizes, with an oxidant, the mediator reduced by the cathode; an oxidant feed path that is connected to the regenerator, wherein through the oxidant feed path, the oxidant to be supplied to the regenerator flows; a reformer; a combustor that heats the reformer; and a first heat exchanger that exchanges heat between combustion exhaust discharged from the combustor and the oxidant to be supplied to the regenerator.

Abstract: A fuel cell system includes: a fuel cell that has a cathode and an anode and generates electricity by reducing a mediator at the cathode; a regenerator that oxidizes, with an oxidant, the mediator reduced by the cathode; a reformer; a combustor that heats the reformer; and a heating medium path that heats the regenerator, wherein through the heating medium path, combustion exhaust discharged from the combustor or a heat medium heated through heat exchange with the combustion exhaust flows.

Abstract: A fuel cell system includes: a fuel cell that includes an anode and a cathode and generates electricity by reducing a mediator at the cathode; a regenerator that oxidizes the mediator reduced by the cathode; a first path that leads from the cathode to the regenerator and through which the mediator reduced by and discharged from the cathode is guided to the regenerator; a second path that leads from the regenerator to the cathode and through which the mediator oxidized at the regenerator is returned to the cathode; and a first heat exchanger that exchanges heat between a first fluid and a second fluid, the first fluid being a fluid flowing in the first path and containing the mediator reduced by cathode, and the second fluid being a fluid flowing in the second path and containing the mediator oxidized at the regenerator.

Abstract: A fuel cell system includes a fuel cell, a regenerator, an oxidant feed path, a gas discharge path, and a heat exchanger. The fuel cell includes an anode and a cathode and reduces a mediator with the cathode. The regenerator oxidizes, with an oxidant, the mediator reduced by the cathode. Through the oxidant feed path, the oxidant is guided to the regenerator. Through the gas discharge path, the gas present inside the regenerator is guided out of the regenerator. The heat exchanger heats the oxidant by exchanging heat between the oxidant flowing in the oxidant feed path and the gas flowing in the gas discharge path.

Abstract: A vehicle display apparatus includes an image display panel, a backlight, and a translucent plate. The image display panel displays an image in a display area. The backlight emits a light in a direction from a back surface of the image display panel toward the display area. The translucent plate has a plate shape and is disposed between the image display panel and the backlight. The translucent plate transmits the light emitted from the backlight. The translucent plate has a three-dimensional indicator configured to be visually recognized through the image display panel, and a periphery portion of the translucent plate is disposed out of the display area.

Abstract: A fuel cell system includes: a fuel cell that has a cathode and an anode and generates electricity by reducing a mediator at the cathode; a regenerator that oxidizes, with an oxidant, the mediator reduced by the cathode; a reformer; a combustor that heats the reformer; and a heating medium path that heats the regenerator, wherein through the heating medium path, combustion exhaust discharged from the combustor or a heat medium heated through heat exchange with the combustion exhaust flows.

Abstract: A fuel cell system includes: a fuel cell that includes an anode and a cathode and generates electricity by reducing a mediator at the cathode; a regenerator that oxidizes the mediator reduced by the cathode; a first path that leads from the cathode to the regenerator and through which the mediator reduced by and discharged from the cathode is guided to the regenerator; a second path that leads from the regenerator to the cathode and through which the mediator oxidized at the regenerator is returned to the cathode; and a first heat exchanger that exchanges heat between a first fluid and a second fluid, the first fluid being a fluid flowing in the first path and containing the mediator reduced by cathode, and the second fluid being a fluid flowing in the second path and containing the mediator oxidized at the regenerator.

Abstract: A fuel cell system includes a fuel cell, a regenerator, an oxidant feed path, a gas discharge path, and a heat exchanger. The fuel cell includes an anode and a cathode and reduces a mediator with the cathode. The regenerator oxidizes, with an oxidant, the mediator reduced by the cathode. Through the oxidant feed path, the oxidant is guided to the regenerator. Through the gas discharge path, the gas present inside the regenerator is guided out of the regenerator. The heat exchanger heats the oxidant by exchanging heat between the oxidant flowing in the oxidant feed path and the gas flowing in the gas discharge path.

Abstract: A fuel cell system includes: a fuel cell that includes a cathode and an anode and generates electricity by reducing a mediator at the cathode; a regenerator that oxidizes, with an oxidant, the mediator reduced by the cathode; an oxidant feed path that is connected to the regenerator, wherein through the oxidant feed path, the oxidant to be supplied to the regenerator flows; a reformer; a combustor that heats the reformer; and a first heat exchanger that exchanges heat between combustion exhaust discharged from the combustor and the oxidant to be supplied to the regenerator.

Abstract: A fuel cell system includes a fuel cell that includes an anode and a cathode and generates electricity by reducing a mediator at the cathode, a regenerator that oxidizes the mediator, a fuel gas feed path through which fuel gas to be supplied to the anode flows, a humidifier that is disposed in the fuel gas feed path and humidifies the fuel gas, and a water collection path that extends from the regenerator to the humidifier and guides to the humidifier at least one selected from steam produced at the regenerator and condensation formed from the steam.

Abstract: An aerial display device is mounted on a vehicle and displays information toward a driver seated in a driver seat of the vehicle. The aerial display device includes a display panel and a reflector array. The display panel including a display surface that emits images as light, the display panel being orientated such that the display surface faces toward the driver seat, the display surface including a screen display area and an aerial display area located next to the screen display area. The aerial display area is located at the upper edge portion of the display surface in an installed orientation. The screen display area is a part of the display surface located below the aerial display area. The reflector array forms the light emitted from the aerial display area as an aerial display image in midair above to the aerial display area.

Abstract: An information display portion indicates vehicular information relevant to a vehicle. A display plate being translucent is located on a viewing side relative to the information display portion. A reflective portion formed in the display plate is configured to be illuminated in a predetermined shape by light emitted from a light source unit. The reflective portion being illuminated is overlapped on the vehicular information indicated by the information display portion and viewable on the viewing side.

Abstract: A display device for a vehicle includes: a first display unit that displays a real image of first information in a first display portion; and a second display unit that displays a virtual image of second information in a second display portion by projecting an optical image to the second display portion, the second display portion being disposed above the first display portion and transmitting an external image. The display device includes: a light emission unit located adjacent to a side of the first display portion to form a light emission area; and a control unit that changes the light emission area in a guiding direction from the first display portion toward the second display portion during a linking period for linking a particular virtual image display of the second information with a real image display of the first information.

Abstract: An information display portion indicates vehicular information relevant to a vehicle. A display plate being translucent is located on a viewing side relative to the information display portion. A reflective portion formed in the display plate is configured to be illuminated in a predetermined shape by light emitted from a light source unit. The reflective portion being illuminated is overlapped on the vehicular information indicated by the information display portion and viewable on the viewing side.

Abstract: Provided is a method for generating hydrogen. The method comprising (a) preparing a hydrogen generation device comprising a container, a photo-semiconductor electrode comprising a substrate, a light-blocking first conductive layer, and a first semiconductor photocatalyst layer, a counter electrode, a conductive wire for electrically connecting the first conductive layer to the counter electrode, and a liquid stored in the container, and (b) irradiating the first semiconductor photocatalyst layer with light to generate hydrogen on the counter electrode. The first conductive layer is interposed between the substrate and the first semiconductor photocatalyst layer. At least a part of the first semiconductor photocatalyst layer is in contact with the liquid. At least a part of the counter electrode is in contact with the liquid. The liquid is selected from the group consisting of an electrolyte aqueous solution and water. The substrate is formed of a resin.

Abstract: A display apparatus includes: a dial having a first surface, a second surface and an opening; a meter; a decorative part at a peripheral part of the meter; a display at a second surface side and displaying an image; and a controller controlling an image display state. An outermost area of the display overlaps with a part of the meter. The decorative part includes: a body member having a light-transmitting property; and a surface-treated layer having a light-transmitting property and a light-reflecting property. The controller switches the state of image display in the outermost area and a non-overlapping area. The decorative part is visually recognized due to the light-reflecting property of the surface-treated layer when the image is in the non-overlapping area. The image is visually recognized in an overlapping part of the decorative part due to the light-transmitting property when the image is in the outermost area.