A beam splitterreflects a portion of light emitted from a first image projector in a first direction while allowing another portion of the light to transmit in a second direction. A first retroreflectorretroreflects the light reflected in the first direction toward the beam splitter. A second retroreflectorretroreflects the light transmitted in the second direction toward the beam splitter. The beam splitterallows the light retroreflected by the first retroreflectorto transmit toward an imaging opticswhile reflecting the light retroreflected by the second retroreflectortoward the imaging optics.

A vehicle type database includes a plurality of vehicle type profiles. Each of the vehicle type profiles is associated with a vehicle type having a vehicle type specific aerodynamic profile and includes optimal following ranges associated with the vehicle type. Each of the optimal following distance ranges is based on the vehicle type specific aerodynamic profile of the vehicle type and a vehicle speed of the vehicle type wherein a trailing vehicle disposed in the optimal following range is configured to operate at an optimal fuel efficiency. A first optimal following distance range is identified based on a first vehicle type and a first vehicle speed using a first vehicle type profile associated with the first vehicle type. A command is issued to the AR vehicle HUD display system to display a graphical representation of the first optimal following distance to overlay an actual view of the road.

Systems, apparatus, computer implemented methods, and computer program products to enhance the operation of a vehicle. A HUD apparatus includes a laser light source to generate laser light to be reflected an optical member, one or more elastically deformable position adjustment members, and one or more UV light sources. The elastically deformable position adjustment members are operable to adjust a spatial orientation of the optical member, and include one or more photochromatic regions to facilitate movement of the one or more elastically deformable position adjustment members from a contracted state to an expanded state in response to exposure to UV light emitted by the U light source(s). In that way, adjustments in the spatial orientation of the optical member and a change in direction of laser light reflected by the optical member as obtained.

An optical system includes a display including an active display region configured to emit an image. The active display region includes a predetermined region including a display center. A windshield of a vehicle includes an embedded reflective polarizer. The reflective polarizer reflects between about 20% to about 40% of incident light polarized along a first direction, and transmits at least 60% of the incident light polarized along a second direction. The reflective polarizer receives the image emitted by the active display region and reflects a portion toward the eye. For at least one first location within the predetermined region, the emitted image includes an image cone having an emitted central image ray emitted from the first location. The emitted central image ray is polarized along a third direction when incident on the windshield in an incident plane. The first and third directions are substantially parallel to the incident plane.

A coated article includes a substrate, a first dielectric layer, a first metallic layer, a first primer layer, a second dielectric layer, a second metallic layer, a second primer layer, a third dielectric layer, a third primer layer, a third metallic layer, and a fourth dielectric layer. The total combined thickness of the metallic layers is at least 30 nanometers and no more than 60 nanometers. The article can have a sheet resistance of less than 0.85 Ω/□, a visible light reflectance of not more than 10%, and a visible light transmittance of at least 70%.

A light guide body in a display device includes a first incident surface on which an image light is incident, and a second emission surface from which the image light is emitted. The light guide body includes a second emission optical element that diffracts the image light to emit a portion of the image light at a predetermined emission angle every time the image light enters the second emission optical element from a predetermined direction. The image light is diverged by being emitted from the second emission optical element such that the predetermined emission angle varies in accordance with a location in one predetermined region included in a plurality of predetermined regions of the optical element. The degree of divergence varies between the one predetermined region and other predetermined region included in the plurality of predetermined regions in accordance with the location of the virtual image.

A display device includes a light guide body and displays an image of light emitted from the light guide body. The light guide body is of a curved shape, and includes a light guide plate and an optical element that diffracts and emits light propagating inside the light guide plate. The optical element is provided in the light guide body so that the angle of the optical element relative to a propagation direction in which the light propagates inside the light guide plate is constant irrespective of where in the optical element.

A presentation control device is configured to control information presentation to a driver of a vehicle. A determination unit is configured to distinguish between a monitoring interruption mode in which the driver is permitted to interrupt surroundings monitoring and a monitoring-required mode in which the driver is prohibited to interrupt the surroundings monitoring, and in the monitoring-required mode, between a hands-free permitted state and a hands-free prohibited state. A presentation control unit configured to perform the information presentation related to a mode transition from the monitoring interruption mode to the monitoring-required mode when the mode transition occurs. The presentation control unit is configured to perform the information presentation at an earlier timing when the monitoring interruption mode is transitioned to the hands-free prohibited state than when the monitoring interruption mode is transitioned to the hands-free permitted state.

Imaging and display system includes: a display; an optical system including a first mirror and a second mirror; a housing; a light-transmissive cover transparent to light and disposed to cover at least part of an opening of the housing; and a driver monitoring camera supported by a supporting body connected outside of the housing. First light emitted from the display passes through the light-transmissive cover via the optical system, and is reflected by a windshield toward a direction of the user. The driver monitoring camera captures an image of a driver shown on the light-transmissive cover by second light from a direction of the driver reflected by the windshield toward a direction of the light-transmissive cover.

A display device includes: a display that generates image display light; a concave mirror that reflects the image display light such that the image display light is projected onto a transparent member; and a drive mechanism that moves the display in a range in which a distance from the concave mirror to the display is smaller than or equal to a reference distance at which the image display light traveling from the concave mirror to the transparent member becomes parallel light.