Abstract: A vehicle structure includes: a pair of side frames disposed apart in a vehicle width direction and extending in a vehicle front-rear direction; and a cross member extending in the vehicle width direction, and penetrating the pair of side frames and connecting the pair of side frames. The cross member is formed of a pipe having a substantially square cross section with a corner portion curved in an arc shape. A corner portion of the cross member at a vehicle lower side is set to have a curvature radius larger than a curvature radius of a corner portion at a vehicle upper side.

Abstract: A light source unit includes a display device configured to display an image, a reflective polarizing element on which light emitted from the display device is incident, a reflecting member, and a waveplate. The reflective polarizing element transmits a first polarized light and reflects a second polarized light. The reflecting member reflects, toward the reflective polarizing element, light transmitted by the reflective polarizing element. The waveplate is interposed in a portion of an optical path between the reflective polarizing element and the reflecting member. The optical path is of light emitted from the display device, transmitted by the reflective polarizing element, reflected by the reflecting member, and reflected by the reflective polarizing element. A normal of the waveplate is tilted with respect to a direction of the optical path transmitted by the waveplate partway from the reflective polarizing element toward the reflecting member.

Abstract: An image display device includes: a first display device configured to display a first image; an imaging optical system including: an input element configured to receive light emitted from the first display device, and an output element configured to receive light traveling via the input element and to emit light to form a real image corresponding to the first image; an optical member configured to reflect light emitted from the imaging optical system; and a second display device configured to display a second image. The imaging optical system is substantially telecentric at a real image side. The first display device is configured such that the light emitted from the first display device exhibits a substantially Lambertian light distribution. The imaging optical system and the optical member are configured such that the real image is formed between the imaging optical system and the optical member.

Abstract: An image display device includes: a display device configured to display an image; a liquid crystal element on which light emitted from the display device is incident, the liquid crystal element being configured to selectively allow one of P-polarized light or S-polarized light to exit the liquid crystal element; a reflective polarizing member configured to reflect the one of the P-polarized light or the S-polarized light that has exited the liquid crystal element and to transmit the other of the P-polarized light or the S-polarized light; and a reflecting member configured to reflect the other of the P-polarized light or the S-polarized light in the same direction as a travel direction of the one of the P-polarized light or the S-polarized light reflected by the reflective polarizing member

Abstract: The present disclosure stabilizes power generation of a fuel cell stack in an environment in which an oxygen concentration in a fuel cell system readily decreases. In a case where it is detected that the oxygen concentration is lower than a predetermined concentration or where a phenomenon caused by the oxygen concentration being lower than the predetermined concentration is detected, processing to increase a flow rate of air supplied to the fuel cell stack or processing to ventilate the interior of the fuel cell stack by controlling an operation of a ventilation unit is performed.