Abstract: A virtual image display device includes: a display including a pixel region that emits image light of right circularly polarized light, and configured to transmit external light, a first optical member having a flat surface on the display side and including a semi-transmissive reflective optical surface having power inside thereof, a wave plate being a quarter-wave plate configured to convert a polarization state of the image light passing through the first optical member to be vertically polarized being linearly polarized, and a second optical member including a polarization reflective layer that reflects the image light passing through the wave plate, wherein an imaging optical system in which the first optical member, the wave plate, and the second optical member are combined does not substantially have power for left circularly polarized light being a polarized component of the external light passing through a light transmission region of the display.

Abstract: A display device or optical module includes a display element that emits image light, an imaging optical system as a light guide optical device that has non-axial symmetry in a predetermined direction and forms an exit pupil by light guiding of the image light from the display element, and a light-shielding member disposed between the display element and the imaging optical system, wherein the light-shielding member has a light-shielding part disposed to overlap an unused region in which an image is not displayed in a display region of the display element.

Abstract: A display device includes an image element, a prism mirror configured to cause imaging light emitted from the image element to be incident on a light incident surface, to reflect the imaging light by an inner reflection surface, and to emit the imaging light from a light emission surface, thereby emitting the imaging light so that the imaging light is returned in an inclined direction, a see-through mirror configured to reflect the imaging light emitted from the prism mirror toward a pupil position, and a basic aperture diaphragm configured to limit the passage of the imaging light incident on the light incident surface of the prism mirror.

Abstract: An optical module according to the present disclosure includes a display element, a first optical member, a second optical member, a third optical member, and an adhesive joints the first optical member and the second optical member. A first optical member includes a first positioning portion that performs a positioning with respect to a second optical member and the second optical member includes a second positioning portion that performs a positioning with respect to the first optical member.

Abstract: A virtual-image display device or an optical unit includes a first display device configured to output image light of circularly polarized light; a first reflection member having a flat surface and configured to reflect the image light to a diagonal direction; and a second reflection member having a positive power and configured to reflect, toward the first reflection member, the image light reflected at the first reflection member. The first reflection member includes a first optical function layer that is one of a cholesteric liquid crystal layer and a transmissive reflection layer. The second reflection member includes a second optical function layer that is the other one of the cholesteric liquid crystal layer and the transmissive reflection layer.

Abstract: An optical unit and an image display device include a display element configured to emit imaging light, a first mirror having partial transparency and configured to reflect a portion of the imaging light emitted from the display element, and a second mirror configured to return the imaging light reflected by the first mirror to the first mirror to form an exit pupil. The imaging light is incident on the first mirror from the display element at a first incident angle, and the imaging light is incident on the first mirror at a second incident angle that is smaller than the first incident angle from the second mirror, and the first mirror includes an angle dependent separation film that shows different separation characteristics for the imaging light according to the difference between the first incident angle and the second incident angle.

Abstract: A virtual image display device includes an image generation device, and a concave transmissive mirror configured to reflect image light emitted from the image generation device. A light superimposer is provided on an external side of a partial reflective film provided in the concave transmissive mirror, the light superimposer being configured to superimpose additional light in a visible range on image light transmitted through the partial reflective film.

Abstract: A virtual image display device includes: a first lens that has a positive refractive power and on which video light from the display element is incident, a second lens that has a positive refractive power and on which the video light passed through the first lens is incident, a prism light-guiding member that includes a first prism and a second prism, a polarized light separation film that is provided at a bonding position of the first prism and the second prism, a third lens that is disposed facing an outer surface of the first prism and that has a plano-convex shape, a transmissive mirror that is disposed on a convex surface of the third lens and that is configured to partially reflect the video light, and a quarter-wavelength plate disposed between the outer surface and the flat surface of the third lens.

Abstract: A virtual image display device includes: a first lens that has a positive refractive power and on which video light is incident from the display element, a first prism on which the video light passed through the first lens is incident, a second prism that is bonded to the first prism, a polarized light separation film that is provided at a bonding site of the first prism and the second prism, a second lens that is disposed facing an outer surface of the first prism, a transmissive mirror that is formed on a convex surface of the second lens, a quarter-wavelength plate disposed between the outer surface and the flat surface of the second lens, and a compensation lens that has a shape obtained by inverting the convex surface of the second lens and that is bonded to the convex surface.

Abstract: A virtual image display device includes: a first lens that has a positive refractive power and on which video light is incident from the display element, a first prism on which the video light passed through the first lens is incident, a second prism that is bonded to the first prism and that forms a prism light-guiding member, a polarized light separation film that is provided at a bonding site of the first prism and the second prism, an angle selection film disposed on an outer surface in the prism light-guiding member, a second lens that is disposed in a facing manner to the angle selection film, a transmissive mirror that is disposed on a convex surface of the second lens, a quarter-wavelength plate disposed between the angle selection film and the second lens, and a compensation lens that is bonded to the convex surface.

Abstract: Provided are a new phosphor having emission characteristics different from the conventional nitride or oxynitride phosphor, a manufacturing method, and a light-emitting device. In an embodiment, the phosphor may include inorganic substance having crystal represented by A26(D, E)51X86 including at least A, D, X (A is at least one kind of element selected from Mg, Ca, Sr, and Ba; and D is Si, and X is at least one kind of element selected from O, N, and F); and further includes, if necessary, E (E is at least one kind of element selected from B, Al, Ga, and In) wherein the crystal further includes M (M is at least one kind of element selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb). Upon irradiation of excitation source, the maximum value of emission peak in a wavelength range from 630 nm to 850 nm may occur.

Abstract: A braking control apparatus includes a contact determiner and a collision brake processor. The contact determiner is configured to determine whether a collision determination on a contact of a vehicle is satisfied. The collision brake processor is configured to cause a brake device of the vehicle to generate a braking force to achieve a predetermined deceleration rate of the vehicle if the contact determination is satisfied. The collision brake processor is configured to, upon determining that the brake device is in a predetermined pre-contact braking state immediately before the contact determination is satisfied, set a deceleration rate of the vehicle after the contact determination is satisfied to a value larger than in a case where the collision brake processor does not determine that the brake device is in the predetermined pre-contact braking state.

Abstract: A vehicle theft deterrent apparatus includes a driver verifier, a steering torque detector, an actuator, and a steering controller. The steering torque detector is configured to detect steering torque input by a driver to a steering system. The actuator is configured to generate drive torque to be given to the steering system. The driver verifier is configured to verify whether driver information obtained from the driver matches registered information registered in advance. The steering controller is configured to control the drive torque generated by the actuator based on the steering torque. In a case where the driver verifier determines that the driver information does not match the registered information, the steering controller is configured to permit the driver to steer until a vehicle drives a set distance, and then to cause the actuator to generate the drive torque prohibiting the driver from steering.

Abstract: A virtual image display device includes a first image display device configured to display a virtual image, a second image display device configured to display a virtual image, a line-of-sight direction distance detection device configured to detect an object distance in a line-of-sight direction of a wearer, an image display control unit configured to control display states of the first image display device and the second image display device in accordance with the object distance, and a liquid crystal lens configured to be disposed in front of eyes of the wearer and configured such that a focal length changes with respect to a s-polarization component of image light emitted from the first image display device and the second image display device.

Abstract: The invention provides a cable abnormality assessment system, a slave device, and a cable abnormality assessment method. A cable abnormality assessment system is provided with a diagnosis control unit for assessing a cable abnormality on the basis of link-up information between a communication unit and another machine connected to the other end of a cable, and first and second information that are the respective results of abnormality diagnosis by a signal line diagnosis unit with regard to one and the other of two pair signal lines of the cable.

Abstract: A display device includes an image element, a prism mirror that receives image light emitted from the image element through a light incident surface, reflects the image light with an inner reflection surface, and emits the image light from a light emission surface, and a see-through mirror that reflects the image light emitted from the prism mirror toward a pupil position, wherein the prism mirror emits the image light incident from a front to be bent in a direction inclined with respect to the front, and a light emission side of an image source that includes the image element and the prism mirror is covered with a light transmission window that blocks dust.

Abstract: A secondary battery protection apparatus includes a temperature sensitive element and a secondary battery protection circuit with a first terminal coupled to an external device and the temperature sensitive element to control charge and discharge using a switching circuit to protect a secondary battery from temperature, and a conversion circuit of the secondary battery protection circuit is controlled such that a first input of a comparison circuit to compare a voltage against a threshold is electrically coupled to the first terminal of the secondary battery protection circuit, the voltage corresponding to a change in temperature of the secondary battery.

Abstract: A virtual image display device includes: a scattering member including a scattering region for scattering image light as a pixel display region, a projection optical system configured to irradiate the scattering region with the image light, a light-blocking member arranged at an external side of the scattering member and configured to suppress incidence of external light on the scattering region, a first polarizing member arranged at a face side of the scattering member and including a first polarizing region provided corresponding to the scattering region, a second polarizing member arranged at an external side of a position of the first polarizing member and including a second polarizing region for restricting the external light to a second polarization direction, and a polarization separation lens element arranged at a face side of the first polarizing member and having refractive power that selectively acts on polarized light of the image light.

Abstract: A head-mounted display apparatus includes: a first projection optical system that irradiates a first scattering region with image light, a second projection optical system that irradiates a second scattering region with the image light, a first polarizing member arranged at a face side of the scattering member and including a first polarizing region provided corresponding to the first scattering region and the second scattering region for restricting the image light scattered by the scattering member to a first polarization direction, a second polarizing member arranged at an external side of a position of the first polarizing member and including a second polarizing region for restricting the external light to a second polarization direction, and a polarization separation lens element arranged at a face side of the first polarizing member and having refractive power that selectively acts on polarized light of the image light.

Abstract: A virtual image display device includes: a display member including a wavelength-converting region that emits fluorescence upon being excited by image light as a pixel display region, a projection optical system that irradiates the wavelength-converting region with the image light, a light-blocking member arranged at the external side of the display member for suppressing incidence of external light on the wavelength-converting region, a first polarizing member arranged at the face side of the display member and including a first polarizing region, a second polarizing member arranged at the external side of a position of the first polarizing member and including a second polarizing region for restricting the external light to a second polarization direction, and a polarization separation lens element arranged at the face side of the first polarizing member and having refractive power that selectively acts on polarized light of the image light.