Abstract: Head-up display, which is mounted on a vehicle, performs projection on a transparent reflective member, and allows an observer to visually recognize a virtual image, includes display device that displays an image, and a projection optical system that has refractive optical system and projects displayed image displayed by display device on eye box of the observer. As an angle formed between a vector of a light beam that is incident on refractive optical system and a vector of an output light beam, the angle is greater at a light beam on an image end passing through a vehicle inner side of refractive optical system than at a light beam on an image end passing through a vehicle outer side of refractive optical system.

Abstract: To provide a display device that can suppress generation of a double image. Display device includes plate-shape windshield having translucency and a projection unit that projects light expressing an image onto windshield such that the light is reflected toward a user by windshield. The projection unit changes a display distance between an eye of the user and a position of an image visually recognized as a virtual image by the user through windshield by the light projection. Windshield is formed such that a wedge angle that is of an angle formed between a front side and a back side at a region located at any level of windshield is continuously decreased with increasing level.

Abstract: A display device displays a virtual image of a first picture and a virtual image of a second picture by using a display medium. This display device includes a light source that emits light, a fixed screen, a movable screen, a driver, and a scanner. The fixed screen is fixedly disposed on an optical path between the light source and the display medium. The movable screen is also disposed on this optical path. The driver moves the movable screen along the optical path. The scanner scans the fixed screen and the movable screen with the light emitted from the light source, thereby forming the first picture on the fixed screen and the second picture on the movable screen.

Abstract: A head-up display that allows an observer to visually recognize a virtual image in a viewpoint region of the observer is provided. The head-up display includes: a display device that has a display surface and displays an image on the display surface; and a first optical system that has a concave mirror, and a lens condensing the light and disposed between the concave mirror and the display surface. The first optical system causes a beam exiting from the display surface to form an intermediate image via the lens and the concave mirror, the intermediate image being enlarged from the image displayed on the display surface.

Abstract: The present invention provides a display device that can easily perform control for driving a movable screen. Display device includes light source that emits a light beam, scanner that causes the light beam from light source to scan, movable screen in which a first image is formed by transmitting the light beam from scanner, projection unit that projects the first image formed in movable screen on windshield and displays a virtual image of the first image in a space in front of windshield, and driver that causes movable screen to reciprocate in a first direction separating from scanner and in a second direction approaching scanner. Movable screen reciprocates in a posture inclined to moving directions of movable screen.

Abstract: Head-up display projects an image on transparent windshield to cause an observer to visually recognize a virtual image. Head-up display includes screen, optical system displays the image. Optical system projects the image displayed by screen on windshield. Driving unit moves screen. Optical system forms an intermediate image between optical systems, the intermediate image being larger than the image of screen.

Abstract: A head-up display includes a display device, a CPU, and a projection optical system. The display device has pixels including a first-color subordinate pixel and a second-color subordinate pixel, and displays an image. The CPU controls display of the display device. The projection optical system has a refractive optical system, and projects the image displayed on display device on a viewpoint region of an observer. The CPU asymmetrically shifts, between the reference outer side image end and the reference inner side image end with reference to a center, a pixel of an image formed by the second-color subordinate pixel relative to an image formed by the first-color subordinate pixel.

Abstract: A head-up display projects an image on a transparent reflective member to allow an observer to visually recognize a virtual image. The head-up display includes a display device and a projection optical system. The projection optical system includes a refractive optical system and a concave mirror. The display device displays the image. The projection optical system projects the image displayed on the display device to a visual point of an observer. The refractive optical system includes at least one optical element. The concave mirror has a concave reflection surface. The refractive optical system is positioned on an optical path between the display device and the concave mirror. In the refractive optical system, an incident surface of a lens element having negative power into which light of the image displayed on the display device is incident is concave.

Abstract: A head-up display projects an image on a windshield to allow a viewer to visually observe a virtual image. The head-up display includes a display device, a relay optical system, and a projection optical system. The display device displays an image. The relay optical system provides the image displayed by the display device as an intermediate image. The projection optical system reflects the intermediate image provided by the relay optical system to project the intermediate image on the windshield.

Abstract: Head-up display, which is mounted on a vehicle, performs projection on a transparent reflective member, and allows an observer to visually recognize a virtual image, includes display device that displays an image, and a projection optical system that has refractive optical system and projects displayed image displayed by display device on eye box of the observer. As an angle formed between a vector of a light beam that is incident on refractive optical system and a vector of an output light beam, the angle is greater at a light beam on an image end passing through a vehicle inner side of refractive optical system than at a light beam on an image end passing through a vehicle outer side of refractive optical system.

Abstract: A light beam that is emitted from a center of display surface and reaches a center of a viewing area is referred to as reference light beam. An intersection of reference light beam with reflective surface of first reflective element is referred to as reference intersection point. A plane including reference light beam incident on first reflective element and reference light beam reflected by first reflective element is referred to as a reference plane. An intersection line of reflective surface of first reflective element with the reference plane is referred to as reference intersection line. A tangent plane of reflective surface of first reflective element at reference intersection point is referred to as reference tangent plane. Respective heights from two points, vertically upper point and vertically lower point, which are equidistant from reference intersection point on reference tangent plane, to reflective surface of first reflective element are referred to as a sag.

Abstract: A refractive optical system is disposed in an optical path from a display surface to a viewing area and between a projection optical system and the viewing area. A housing receives a display device, the projection optical system, and the refractive optical system, and is provided with an opening. An opening cover has at least partially a curved portion, and is disposed in the opening so that light emitted from the display surface is incident on a convex side of the curved portion. When a light beam that is emitted from a center of the display surface and reaches a center of the viewing area is referred to as a reference light beam, a head-up display satisfies the following condition (1): L2?L1??(1) where L1 is a distance from an end on the anterior side of the observer of the refractive optical system to the opening cover, and L2 is a distance from a position at which the reference light beam passes through the refractive optical system to the opening cover.

Abstract: A head-up display that allows an observer to visually recognize a virtual image in a viewpoint region of the observer is provided. The head-up display includes: a display device that has a display surface and displays an image on the display surface; and a first optical system that has a concave mirror, and a lens condensing the light and disposed between the concave mirror and the display surface. The first optical system causes a beam exiting from the display surface to form an intermediate image via the lens and the concave mirror, the intermediate image being enlarged from the image displayed on the display surface.

Abstract: A head-up display includes a display device, a CPU, and a projection optical system. The display device has pixels including a first-color subordinate pixel and a second-color subordinate pixel, and displays an image. The CPU controls display of the display device. The projection optical system has a refractive optical system, and projects the image displayed on display device on a viewpoint region of an observer. The CPU asymmetrically shifts, between the reference outer side image end and the reference inner side image end with reference to a center, a pixel of an image formed by the second-color subordinate pixel relative to an image formed by the first-color subordinate pixel.

Abstract: A display apparatus includes a display unit projecting an image to a light transmissive display member, and the display apparatus forms a virtual image of the image projected by the display unit on an opposite side to a user side. The display unit is configured to accommodate a display device displaying the image and a projection optical system that projects the image displayed on the display device to the display member in a housing. The projection optical system includes a first reflecting member disposed on a display device side and a second reflecting member disposed on an opening side in an optical path extending from the display device. A reflection surface of the first reflecting member reflecting the image displayed on the display device has a convex shape, and a reflection surface of the second reflecting member projecting the image to the display member has a concave shape.

Abstract: A zoom lens system comprising a positive first lens unit; a negative second lens unit; and subsequent five or six lens units, wherein an aperture diaphragm is provided, intervals between the adjacent lens units vary in zooming, the first lens unit moves in zooming and is fixed in focusing, and the conditions: BF/fW<0.66, DA/LW>0.42, and DAIR/Y<2.00 (BF: distance from an image-side surface apex of a most-image-side lens element to an image surface, fW: focal length of system at wide-angle limit, DA: sum of optical axial thicknesses of the lens units in system, LW: overall length of system at wide-angle limit, DAIR: maximum of air spaces between the lens elements constituting system at wide-angle limit, Y=fT×tan(?T), fT: focal length of system at telephoto limit, ?T: half view angle at telephoto limit) are satisfied.

Abstract: A head-up display in accordance with the present disclosure includes a display device that displays an image toward a vertically downward direction, a first mirror that reflects the image to output reflected light toward a vertically upward direction, and a second mirror that reflects the reflected light from the first mirror to output reflected light toward a vertically upward direction. Also, a vehicle in accordance with the present disclosure includes a head-up display in accordance with the present disclosure, and a windshield that reflects reflected light emitted from the head-up display. The present disclosure makes it possible to provide a thin head-up display.

Abstract: An inner focus lens system comprising a first lens unit and subsequent lens units, wherein the first lens unit: is fixed with respect to an image surface in focusing; and includes a first positive lens element located closest to the object side and a second positive lens element, the subsequent lens units include only a first focusing lens unit located closest to the object side and a second focusing lens unit, at least one of the first focusing lens unit and the second focusing lens unit is composed of two or less lens elements, and the subsequent lens units include an image blur compensating lens unit.

Abstract: A display apparatus includes a display unit that projects an image to a light transmissive display member. The display unit is configured to accommodate a display device and a projection optical system that projects the image displayed on the display device to the display member in a housing including an opening through which projected light is output. The projection optical system includes a first reflecting member disposed on a display device side and a second reflecting member disposed on an opening side in an optical path extending from the display device to the opening. A reflection surface of the first reflecting member that reflects the image displayed on the display device has a convex shape of a free-form surface, and a reflection surface of the second reflecting member that projects the image to the display member has a concave shape of a free-form surface.

Abstract: A display apparatus includes a display unit projecting an image to a light transmissive display member, and the display apparatus forms a virtual image of the image projected by the display unit on an opposite side to a user side. The display unit is configured to accommodate a display device displaying the image and a projection optical system that projects the image displayed on the display device to the display member in a housing. The projection optical system includes a first reflecting member disposed on a display device side and a second reflecting member disposed on an opening side in an optical path extending from the display device. A reflection surface of the first reflecting member reflecting the image displayed on the display device has a convex shape, and a reflection surface of the second reflecting member projecting the image to the display member has a concave shape.