Abstract: A light source module including first and second light sources, first and second wavelength conversion units, and first and second light splitting units is provided. The first light source emits a first light having a first wavelength. The first wavelength conversion unit converts at least one portion of the first light into a first converted light having a second wavelength. The second light splitting unit allows the lights having the second and third wavelengths to travel through and reflects the light having the first wavelength. The second light source emits a second light having the first wavelength. The second wavelength conversion unit converts at least one portion of the second light into a second converted light having the third wavelength. The first light splitting unit is disposed between the first and second wavelength conversion units and reflects the first wavelength and allows the second wavelength to travel through.

Abstract: A light source device and an image display device that combine light with high efficiency are provided. The light source device includes a first light source unit, a first illumination optical system that emits a first illumination light, a second light source unit, a second illumination optical system that emits a second illumination light, and a combiner on which the first illumination light and the second illumination light are incident. The combiner filters the incident light on the basis of a wavelength range and an incident angle, and angles at which the first illumination light and the second illumination light are incident on the combiner are each adjusted in such a way that the wavelength range of the first illumination light emitted from the combiner and the wavelength range of the second illumination light emitted from the combiner approach or overlap with each other.

Abstract: A light source unit includes a first light source for first light, a second light source for second light differing from the first light, a display device for performing a gradation control on the first light and the second light which are emitted in a time dividing fashion in corresponding gradation control periods to thereby form image light, and a processor configured to control a first dimming mode for adjusting a quantity of light of the first light source in the gradation control periods of the first light and the second light and a second dimming mode for adjusting the quantity of light of the first light source by performing a turn-off control in at least a partial period of the gradation control period of the first light and adjusting the quantity of light of the first light source in the gradation control period of the second light.

Abstract: The present disclosure concerns a light-field projection system, comprising a pin-light array generating an incident light-field illuminating an optical light modulator for modulating the incident light-field and projecting a plurality of modulated light-field components along a projection axis; a first optical element configured for forming first pin-light images in a first pin-light plane and modulator images in a modulator image plane; and a second optical element defining an eye-box region and for forming second pin-light images in a second pin-light plane within the eye-box; the first and second pin-light planes and the modulator image plane being substantially perpendicular to the projection axis; the system further comprising at least one optical device at the first pin-light plane and being configured for interacting with at least one of the modulated light-field components, spatially shifting the modulated light-field components in the modulator image plane.

Abstract: An illumination system, including a housing, a first light source, a second light source, a polarization beam splitting element, and a heat dissipation module, is provided. The first light source and the second light source are disposed in the housing and are respectively configured to provide a first beam to the polarization beam splitting element along a first optical axis and a second beam to the polarization beam splitting element along a second optical axis. A portion of an inner surface of the housing has a light absorption region. The light absorption region is configured to absorb the first beam that is not reflected by the polarization beam splitting element and the second beam that does not penetrate the polarization beam splitting element, so as to convert them into heat. The heat generated by the light absorption region is dissipated by the heat dissipation module.

Abstract: A projector includes an image light generator configured to modulate light emitted from a light source to generate image light, a projection optical device configured to project the image light, a polarization switching element disposed at a light exit side of the image light generator and configured to switch a polarization state of the image light emitted from the image light generator, and a controller configured to control the polarization switching element. The controller controls the polarization switching element to switch the polarization state of the image light with a predetermined period.

Abstract: A light source apparatus according to an aspect of the present disclosure includes a light source that outputs excitation light, a wavelength converter including a reflection layer and a wavelength conversion layer that is provided on the light incident side of the reflection layer and converts the excitation light in terms of wavelength into wavelength converted light having a wavelength band different from that of the excitation light, a first optical element that causes the excitation light from the light source to be incident on the wavelength converter, and a second optical element that is disposed in the optical path between the light source and the wavelength converter and causes at least part of reflected light of the excitation light reflected off the wavelength converter to exit toward the wavelength converter.

Abstract: A light source apparatus includes light sources emitting first and second polarized light, an optical element transmitting one of the polarized light and reflecting the other, a polarization rotator generating polarization rotated light from the first polarized light, a wavelength convertor converting the second polarized light into wavelength converted light, and a controller. The optical element generates emitted light by combining the wavelength converted light and polarization rotated light. The controller acquires respective deterioration amounts of the light sources, and controls, based on respective changes in light emission amounts from the light sources acquired from the deterioration amounts, the light emission amount from at least one of the light sources for making different respective change amounts of the light emission amounts from the light sources, or changing a ratio between respective light emission amounts from the light sources.

Abstract: An optical module comprising: a partial-transmitting and partial-reflective layer, receiving circularly polarized light or elliptically polarized light; a second phase delay unit, located downstream of an optical path of the partial-transmitting and partial-reflective layer so as to receive and modulate the transmitting circularly polarized light or elliptically polarized light and then perform emission; and a polarized beam splitter, disposed downstream of an optical path of the second phase delay unit, the polarized beam splitter having a light transmission axis, wherein the optical module further comprises a second phase compensation unit located between the second phase delay unit and the polarized beam splitter, and wherein an optical axis of the second phase compensation unit is located in a plane orthogonal to the light transmission axis of the polarized beam splitter, or in a plane orthogonal to a light reflection axis of the polarized beam splitter.

Abstract: A tunable light projector including the following is provided. A light source is configured to emit a light beam. A fixed optical phase modulator is disposed on a path of the light beam and is configured to modulate phases of the light beam. A tunable liquid crystal panel is disposed on the path of the light beam and a partial region of the tunable liquid crystal panel is configured to electrically switch the light beam between a structured light and a flood light. A driver is configured to control the light source and control the tunable liquid crystal panel to switch the light beam between the structured light and the flood light. The tunable liquid crystal panel includes: a first substrate; a second substrate; a liquid crystal layer; a first electrode layer; and a second electrode layer.

Abstract: The present disclosure provides a projection apparatus. The projection apparatus includes: a light supply device, including an LED lamp and a collimator fly-eye lens, wherein lamp bodies of the LED lamp are arrayed and the LED lamp is capable of simultaneously emitting red, green, and blue light rays, and the collimator fly-eye lens is capable of collimating the light ray emitted by each of the lamp bodies; an optical path conversion device, configured to convert a direction of the light rays emitted by the light supply device; a DMD device, configured to process the light rays from the optical path conversion device and feed the processed light rays to the optical path conversion device; and a projection lens device; wherein the light rays transmitted by the optical path conversion device to the projection lens device to achieve image projection.

Abstract: A light source device includes: blue, green, and red laser light sources; a first retardation plate that controls polarization of blue laser light emitted from the blue laser light source; a polarizing beam splitter that separates the blue laser light whose polarization is controlled by the first retardation plate into a first blue laser light and a second laser light; a second retardation plate that controls polarization of the second blue laser light separated by the polarizing beam splitter; a fluorescent plate that is excited by the first blue laser light separated by the polarizing beam splitter and emits fluorescent light including a green component and a red component; a first dichroic mirror that combines the second blue laser light whose polarization is controlled by the second retardation plate and light emitted from the green and red laser light sources, to generate combined laser light; a dynamic diffuser plate that diffuses the combined laser light combined by the first dichroic mirror to generat

Abstract: An apparatus includes a display element, and an optical system configured to guide to an exit pupil the display light and external light. The optical system includes a first polarization separating element, a first optical unit, and a second optical unit that includes a half-transmissive reflective surface, a phase plate, and a second polarization separating element. The external light transmits through the first polarization separating element and the second optical unit toward the exit pupil. The display light transmits through the first polarization separating element, is reflected by the first optical unit and the first polarization separating element, is twice reflected by the second optical unit, and travels to the exit pupil. The display light forms an intermediate image in an optical path from the first optical unit to the second optical unit.

Abstract: An optical system of the present disclosure includes: a first optical system that includes a first optical element having a plurality of divided regions having mutually different polarization actions, the first optical element being disposed at a first pupil position in the optical system, and that generates illumination light including a plurality of color light beams in mutually different wavelength bands; a plurality of light valves that each modulates at least one color light beam of the plurality of color light beams included in the illumination light; and a second optical system that includes a second optical element having a plurality of divided regions having mutually different polarization actions, the second optical element being disposed at a second pupil position conjugate to the first pupil position, and on which the plurality of color light beams modulated by the plurality of light valves is incident.

Abstract: A projector according to an aspect of the present disclosure includes an optical path changer that is provided between an image formation unit and an projection optical unit and changes the optical path of image light from the image formation unit, a linkage frame that links the image formation unit and the projection optical unit to each other, and a vibration absorbing member that absorbs vibration generated by the optical path changer. The optical path changer includes a base member, an optical member, and a swing frame that supports the optical member and is swingably supported relative to the base member. The vibration absorbing member has vibration absorbing surfaces that are in contact with the base member of the optical path changer, and the vibration absorbing surfaces are in contact with support surfaces of the linkage frame to cause the support surfaces to support the optical path changer.

Abstract: A light emitting device comprises a plurality of coherent light sources, and a plurality of light scattering structures. Each light scattering structure is located in an optical path for light output from a different corresponding one of the coherent light sources. Each light scattering structure comprises an arrangement of nanoantennas embedded in an electrically responsive material and electrical contacts by which to apply a voltage to the electrically responsive material. Application of a time varying electrical signal causes the refractive index of the electrically responsive material in a light scattering structure to vary and thereby varies light scattering by the nanoantennas in the light scattering structure. This effect may be used to reduce speckle caused by interference of light output by the coherent light sources.

Abstract: A display device (30) comprises a reflective display (38) arranged to render a first image viewable through a viewing surface and a projection means (31-37) arranged to render a second image viewable in reflection on the viewing surface, the reflective display (38) and the projection means (31-37) being mounted on a common frame.

Abstract: A circuit device 100 includes an error detection circuit 110 and a processing circuit 120. The error detection circuit 110 obtains a glare index value, which is an index value indicating glare of a head-up display, based on image data IMD for head-up display. The error detection circuit 110 determines whether or not a glare index value has exceeded a first threshold value, and when the glare index value exceeds the first threshold value, detects occurrence of a first glare error. When occurrence of a first glare error is detected, the processing circuit 120 performs processing corresponding to the first glare error.

Abstract: An illumination system and a projection device having good uniformity are provided. The illumination system includes at least one light source, a depolarizing element, and a light homogenizing element. The at least one light source is configured to provide multiple beams. The depolarizing element is disposed on a transmission path of the beams. The depolarizing element includes a first optical element, which is wedge-shaped and has a first optical axis. A direction of any one of the beams incident onto the first optical element is parallel to the first optical axis. The beams respectively become multiple linearly polarized beams with different polarization directions after passing through the first optical element. The light homogenizing element is configured to allow the linearly polarized beams to pass through to form an illumination beam. The depolarizing element is located between the at least one light source and the light homogenizing element.

Abstract: [Problem] An information processing apparatus, an information processing method, and a recording medium with which a user can recognize a boundary of a drivable range by feedback for a projection specification position by the user to facilitate determination of and search for a projection position are provided. [Solution] The information processing apparatus includes a controller configured to perform processing of outputting feedback indicating an effect corresponding to a boundary of a drivable region of a drive-type projector in a projection environment space in accordance with a state of a projection specification position specified by a user for the drivable region, the state being determined based on the drivable region and the projection specification position.