Abstract: A ground line monitoring system includes a camera mounted in a first automobile vehicle. A waveguide directs a light into the camera having a first in-coupling grating receiving a first light imaging data and passing the first light imaging data as a first frequency of the light and a second in-coupling grating receiving a second light imaging data and passing the second light imaging data as a second frequency of the light. A color filter wheel receives the first frequency of the light and the second frequency of the light. An image sensor of the camera receives the first frequency of the light and the second frequency of the light at different times due to rotation of the color filter wheel. A controller performs a calculation using directions and angles of the first frequency of the light and the second frequency of the light to correct a camera image.

Abstract: A display system for a vehicle includes a display unit mounted to the vehicle and is selectively operable in a first mode as a holographic display and in a second mode as a mirror. Holographic images may include rear view images obtained from a camera or computer generated graphics. Holographic images are displayed at a virtual image plane behind the display to reduce the operator's eyes accommodation.

Abstract: A system includes a display. The display includes an array of LEDs covered by a transparent material. The array of LEDs includes a plurality of first, second, third, and fourth LEDs respectively configured to emit red, green, blue, and violet light. The red, green, and blue light from the first, second, and third LEDs is visible to human eye. Violet light from the fourth LEDs is invisible to human eye. The system includes a photocatalytic coating disposed on the transparent material. The photocatalytic coating includes a photo-catalyst responsive to ultraviolet radiation present in sunlight and to the violet light emitted by the fourth LEDs in the array of LEDs. The system includes a controller configured to selectively turn on the fourth LEDs to activate the photo-catalyst in the photocatalytic coating disposed on the transparent material.

Abstract: A system for measuring speckle contrast includes: a head up display (HUD) system configured to output a predetermined image and having a first pixels per degree (PPD); an imaging colorimeter: having a field of view; positioned such that the predetermined image is in the field of view; having a second PPD that is at least 2.2 times greater than the first PPD of the HUD system; and configured to capture an image including the predetermined image; and a speckle contrast module configured to determine a speckle contrast of the HUD system based on the image.

Abstract: A driver alert system for an automobile includes a global positioning system adapted to monitor a location of an automobile, and a processor adapted to receive data from the global positioning system, receive data of historical wildlife position and migration habits within a pre-determined range from the automobile, calculate a distance from the automobile to an area of wildlife activity as indicated by the data of historical wildlife position and migration habits within the pre-determined range from the automobile, and provide an alert to a driver of the automobile when the data of historical wildlife position and migration habits indicates wildlife movement within the pre-determined range of the automobile and the automobile is within a triggering distance of such wildlife movement.

Abstract: A waveguide head-up display (HUD) includes a waveguide that includes a lower surface and an upper surface and is configured to receive an input and project, based on the input, at least one image from the upper surface and into an eyebox, and a prism arranged at least one of on and above the waveguide. The prism includes a lower surface facing the waveguide and configured to receive the at least one image and an upper surface opposite the lower surface configured to project the at least one image received via the lower surface of the prism. The upper surface of the prism is angled relative to the upper surface of the waveguide such that a first normal of the upper surface of the prism is different from a second normal of the upper surface of the waveguide.

Abstract: A method includes detecting at least one remote vehicle that is within a predetermined distance from the host vehicle, detecting that the light of the remote vehicle that is on, determining a luminous intensity of a light beam emitted by the light of at least one remote vehicle that is within the predetermined distance from the host vehicle, comparing the luminous intensity of the light beam emitted by the light of at least one remote vehicle to a predetermined threshold to determine whether the luminous intensity of the light beam emitted by the light is greater than the predetermined threshold in response to determining the luminous intensity of the light of at least one remote vehicle that is within the predetermined distance from the host vehicle, and dimming at least a portion of the windshield of the host vehicle.

Abstract: A substrate, such as a windshield, includes: a first glass element; a second glass element; and a light absorptive element that is disposed directly between the second glass element and the first glass element, that is configured to receive and absorb light output by an image source.

Abstract: A head up display (HUD) system includes: one or more light sources and one or more phase modulators configured to generate and output a hologram; and a replicator configured to receive the hologram, to generate N replications of the hologram from the hologram, and to output the N replications of the hologram, where N is an integer greater than or equal to 2.

Abstract: A head up display (HUD) system includes: a laser; a liquid crystal on silicon (LCoS) panel configured to modulate light output by the laser; a modulator control module configured to, during each predetermined period: apply power to the LCoS panel for a first predetermined ON period; and disconnect the LCoS panel from power for a remainder of the predetermined period; and a laser control module configured to, during each predetermined period: when a temperature of the LCoS panel is less than a predetermined temperature: apply power to the laser for a second predetermined ON period while power is applied to the LCoS panel and after the modulator control module begins applying power to the LCoS panel, where the second predetermined ON period is less than the first predetermined ON period; and disconnect the laser from power for the remainder of the predetermined period.

Abstract: A holographic display system for a motor vehicle includes a light source for generating a beam of coherent light and a spatial light modulator (SLM) having a two-dimensional pixel array. The two-dimensional pixel array modulates the beam of coherent light for generating a plurality of subframes, with each subframe being associated with one of a plurality of partial fields of view. The system further includes a scanner for directing the subframes onto associated sections of a display surface. The system further includes a computer having a memory including instructions, such that a processor is programmed to control the two-dimensional pixel array of the SLM for generating the subframes. The processor is further programmed to control the scanner for directing the subframes onto associated sections of the display surface and displaying a reconstructed image within a full field of view, which includes each of the partial fields of view.

Abstract: A holographic display system for a motor vehicle includes a coherent light source for generating a beam of coherent light and a spatial light modulator (SLM) having a two-dimensional pixel array, which is encoded with a hologram for modulating a phase of the coherent light. The SLM generates a first diffracted beam associated with a main image and a second diffracted beam associated with a conjugate image, where the first and second diffracted beams are angularly spaced from one another by a first angle. The system further includes an optical component for angularly spacing the first and second diffracted beams from one another by a second angle that is larger than the first angle. The system further includes a display surface receiving the first diffracted beam from the optical component to display the main image, with the display surface being free of the second diffracted beam.

Abstract: A holographic display system for a motor vehicle includes a light source for generating a beam of coherent light and a spatial light modulator (SLM) having a two-dimensional pixel array. The two-dimensional pixel array modulates the beam of coherent light for generating a plurality of subframes, with each subframe being associated with one of a plurality of partial fields of view. The system further includes a scanner for directing the subframes onto associated sections of a display surface. The system further includes a computer having a memory including instructions, such that a processor is programmed to control the two-dimensional pixel array of the SLM for generating the subframes. The processor is further programmed to control the scanner for directing the subframes onto associated sections of the display surface and displaying a reconstructed image within a full field of view, which includes each of the partial fields of view.

Abstract: A projection system includes a projection device and a control module. The projection device is configured to project (i) a first image in a first virtual image plane, and (ii) a second image in a second virtual image plane, wherein the second virtual image plane is further from an eyebox than the first virtual image plane. The control module is configured to: determine an ambient light luminance level; determine a first luminance level for the first virtual image plane based on the ambient light luminance level; determine a second luminance level of the second virtual image plane based on the first luminance level of the first virtual image plane; and control the at least one projection device to display (i) the first image in the first virtual image plane having the first luminance level, and (ii) the second image in the second virtual image plane having the second luminance level.

Abstract: A holographic projection system includes a SLM that receives a light beam and generates a modulated beam projected at an eyebox, where: the modulated beam includes multiple versions of a test image; and the test image includes bright objects and transparent regions, which are selected dark areas of interest for measuring luminance. A control module runs a test to characterize contrast in each of multiple virtual image planes including: controlling the SLM to generate the modulated beam; measuring luminance levels of each of the versions of the test image displayed in the virtual image planes; calculating contrast ratios based on the luminance levels of each of the versions of the test image; determining whether the contrast ratios are within predetermined ranges of predetermined contrast ratios; and adjusting operation of the SLM in response to one of the contrast ratios not being within a corresponding one of the predetermined ranges.

Abstract: A direct-retina holographic projection system includes first and second spatial light modulators (SLMs) and a control module. The first SLM receives a beam of light and dithers the beam of light at a predetermined frequency to provide multiple instances of the beam of light. The second SLM receives the instances of the beam of light, displays an encoded phase hologram of a graphic image to be projected, and diffracts the instances of the beam of light to provide instances of the encoded phase hologram with the same graphic image but multiplied with dithered wavefronts. The control module: iteratively adjusts a parameter of the first SLM to generate the instances of the beam of light; and controls operation of the second SLM to, based on the instances of the beam of light, display multiple instances of the graphic image on a retina of an eye of a viewer.

Abstract: A head up display (HUD) system includes: a laser; a liquid crystal on silicon (LCoS) panel configured to modulate light output by the laser; a modulator control module configured to, during each predetermined period: apply power to the LCoS panel for a first predetermined ON period; and disconnect the LCoS panel from power for a remainder of the predetermined period; and a laser control module configured to, during each predetermined period: when a temperature of the LCoS panel is less than a predetermined temperature: apply power to the laser for a second predetermined ON period while power is applied to the LCoS panel and after the modulator control module begins applying power to the LCoS panel, where the second predetermined ON period is less than the first predetermined ON period; and disconnect the laser from power for the remainder of the predetermined period.

Abstract: A system for measuring speckle contrast includes: a head up display (HUD) system configured to output a predetermined image and having a first pixels per degree (PPD); an imaging colorimeter: having a field of view; positioned such that the predetermined image is in the field of view; having a second PPD that is at least 2.2 times greater than the first PPD of the HUD system; and configured to capture an image including the predetermined image; and a speckle contrast module configured to determine a speckle contrast of the HUD system based on the image.

Abstract: A system to provide a multi-image head up display (HUD) in a vehicle includes a fixed mirror to project a far-plane image at a first distance from an occupant of the vehicle. Control of a position of display of the far-plane image is based on an eye height position of the occupant. The system also includes a rotatable mirror to project a near-plane image at a second distance, closer than the first distance, from the occupant. Control of a position of display of the near-plane image is based on a manual adjustment of a rotational angle of the rotatable mirror by the occupant. Processing circuitry automatically adjusts the position of display of the far-plane image based on inferring the eye height position of the occupant from the rotational angle of the rotatable mirror that controls the display of the near-plane image.

Abstract: A holographic display system is provided and includes a light source, a holographic projector, and a polarizer. The light source is configured to generate a first light beam. The holographic projector includes a spatial light modulator configured to adjust phases of respective portions of the first light beam to generate a phase hologram beam. The phase hologram beam comprises a first polarization and a second polarization. The polarizer is configured to filter out light having the first polarization from the phase hologram beam to provide at least a portion of a filtered phase hologram beam at a diffuser to generate a holographic image, wherein the filtered phase hologram beam includes light with the second polarization and does not include light with the first polarization.