An image display device includes: a light source; a screen on which an image is formed when light from the light source is applied thereto; an optical system configured to generate a virtual image by light from the screen; an actuator configured to move the screen in an optical axis direction; a position detector configured to detect a movement position of the screen; a servo circuit configured to cause the movement of the screen by the actuator to follow a target waveform on the basis of a signal from the position detector; and a correction circuit configured to reduce a deviation between a timing to move the screen by the servo circuit and a timing to form the image on the screen.

In one embodiment, a method includes accessing display timing information associated with a display, and determining, based on the display timing information, one or more rendering requirements for a plurality of portions of the display. For each portion of the display, the method may determine a current viewpoint of a user, render, based on the current viewpoint of the user, pixel values for that portion of the display in accordance with the associated rendering requirement, and send the rendered pixel values to be output by the display. The display timing information may include a waveform associated with an oscillation motion of a scanning assembly of the display, and/or a requested size for each portion of the plurality of portions of the display. The rendering requirements may include a timing interval for rendering and sending the pixel values for each of the plurality of portions of the display.

An optical device may include a light turning element. The optical device can include a first surface that is parallel to a horizontal axis and a second surface opposite to the first surface. The optical device may include a light module that includes a plurality of light emitters. The light module can be configured to combine light for the plurality of emitters. The optical device can further include a light input surface that is between the first and the second surfaces and is disposed with respect to the light module to receive light emitted from the plurality of emitters. The optical device may include an end reflector that is disposed on a side opposite the light input surface. The light coupled into the light turning element may be reflected by the end reflector and/or reflected from the second surface towards the first surface.

In one embodiment, a method includes determining a first time interval for rendering pixel values for a first portion of a display, where the first portion of the display is one of a plurality of portions of the display, accessing a representation of virtual objects in a virtual scene, and determining that the first time interval is insufficient for rendering pixel values for the first portion of the display based on the representation of virtual objects. The method further includes, for each of the portions of the display, determining a current viewpoint of a user, rendering, based on the current viewpoint of the user, pixel values for that portion of the display, and sending the rendered pixel values to be output by the display, where the rendered pixel values for the first portion of the display are rendered based on a simplified representation of virtual objects in the virtual scene.

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.

A projection display device includes an image display control unit configured to perform a first display control for generating image data in accordance with information received from a control unit that controls the vehicle, and a second display control for generating image data in accordance with the measurement information acquired from the information measuring device without passing through the control unit, and a warning determination unit, wherein the image display control unit performs the second display control when the warning determination unit determines that the warning is necessary, and performs the first display control when the warning determination unit determines that the warning is not necessary, in a first mode in which driving of the vehicle is performed in accordance with an internally generated instruction or an instruction externally and wirelessly received, the image display control unit performs at least the second display control without passing through the control unit.

An optical device comprising may include a wedge-shaped light turning element. The optical device can include a first surface that is parallel to a horizontal axis and a second surface opposite to the first surface that is inclined with respect to the horizontal axis by a wedge angle. The optical device may include a light module that includes a plurality of light emitters. The light module can be configured to combine light for the plurality of emitters. The optical device can further include a light input surface that is between the first and the second surfaces and is disposed with respect to the light module to receive light emitted from the plurality of emitters. The optical device may include an end reflector that is disposed on a side opposite the light input surface. The second surface may be inclined such that a height of the light input surface is less than a height of the side opposite the light input surface. The light coupled into the wedge-shaped light turning element may be reflected by the end reflector and/or reflected from the second surface towards the first surface.

A light source device includes a plurality of light sources configured to output a plurality of laser beams of different color components; and circuitry. A ratio in maximum output power between the plurality of laser beams output from the plurality of light sources is variable.

A display system comprises a current source, pulse circuitry, a pulsed laser, control circuitry, and a display surface. The pulse circuitry outputs a first pulse of electrical current based upon electrical current emitted by the current source. The pulsed laser emits first light based upon the first pulse, wherein luminance of the first light is based upon a first amplitude of the first pulse. The control circuitry generates an estimate of pulse history effects on second light that is to be emitted by the pulsed laser, the estimate is generated based upon a parameter of the first pulse and a desired luminance of the second light. The control circuitry causes the pulse circuitry to output a second pulse of electrical current based upon the estimate. Based upon the second pulse, the pulsed laser emits second light with the desired luminance.

One example provides, on a scanning mirror display system, a method for communicating timing information for light samples that are scanned to form a displayed image. The method comprises, for a line of light samples, encoding timing information for a first light sample of the line of light samples using a first, greater number of bits to form encoded timing information for the first light sample. The method further comprises encoding timing information for a subsequent light sample of the line of light samples by computing a derivative based upon a timing of the subsequent light sample compared to a prior light sample, encoding the derivative using a second, lesser number of bits to form encoded timing information for the subsequent light sample, and sending the information for the first light sample and the subsequent light sample across the communications channel.