A light source device includes a light source unit and a rotating wheel. The light source unit is configured to emit first blue light and second blue light. The rotating wheel includes a diffuser layer configured to diffuse and transmit the first blue light, and a phosphor layer configured to convert at least a part of the second blue light into yellow light.

Illuminations systems that separate different colors into laterally displaced beams may be used to direct different color image content into an eyepiece for displaying images in the eye. Such an eyepiece may be used, for example, for an augmented reality head mounted display. Illumination systems may be provided that utilize one or more waveguides to direct light from a light source towards a spatial light modulator. Light from the spatial light modulator may be directed towards an eyepiece. Some aspects of the invention provide for light of different colors to be outcoupled at different angles from the one or more waveguides and directed along different beam paths.

A dual-modulation projection system (100) includes a light source (102), a phase modulator (104), an amplitude modulator (106), and a controller (110) having temporal lightfield simulation capabilities (114). The phase modulator (104) spatially modulates a lightfield from the light source (102) to generate an intermediate image on the amplitude modulator (106). The amplitude modulator (106) spatially modulates the intermediate image to form a final image. The controller (110) models the phase state of the phase modulator (104) during transitions between phase modulator frames and generates lightfield simulations of the intermediate image during the transition. The controller (110) utilizes the lightfield simulations to generate and provide sets of amplitude drive values to the amplitude modulator (106) at a faster rate than that at which the phase modulator (104) is capable of switching.

An illumination system, including a first light source for providing a first beam; a second light source for providing a second beam; a wavelength conversion element having a reflection region and a conversion region, wherein the reflection region is for reflecting the first beam and the conversion region is for converting the first beam into a third beam; a first light splitting element for allowing the second beam to pass; a second light splitting element for reflecting the first beam penetrated by the first light splitting element and allowing the second beam to pass, wherein the first light splitting element is disposed between the wavelength conversion element and the second light splitting element; and a light homogenizing element for receiving the first beam, the second beam, and the third beam, and generating an illumination beam, is provided. A projection apparatus including the illumination system is also provided.

Display devices include waveguides with in-coupling optical elements that mitigate re-bounce of in-coupled light to improve overall in-coupling efficiency and/or uniformity. A waveguide receives light from a light source and/or projection optics and includes an in-coupling optical element that in-couples the received light to propagate by total internal reflection in a propagation direction within the waveguide. Once in-coupled into the waveguide the light may undergo re-bounce, in which the light reflects off a waveguide surface and, after the reflection, strikes the in-coupling optical element. Upon striking the in-coupling optical element, the light may be partially absorbed and/or out-coupled by the optical element, thereby effectively reducing the amount of in-coupled light propagating through the waveguide. The in-coupling optical element can be truncated or have reduced diffraction efficiency along the propagation direction to reduce the occurrence of light loss due to re-bounce of in-coupled light, resulting in less in-coupled light being prematurely out-coupled and/or absorbed during subsequent interactions with the in-coupling optical element.

A projector includes a light outputting apparatus that outputs video light, a projection system that enlarges and projects the video light, and an optical device disposed between the light outputting apparatus and the projection system. The optical device includes a movable section including a glass plate (optical section) having a light incident surface on which the video light is incident, a shaft section that swingably supports the movable section around a first swing axis, and an actuator that causes the movable section to swing. The cross-sectional shape of the shaft section viewed in the direction along the first swing axis is a shape having a plurality of recesses recessed inward.

An illumination system including a first light source device, a light guide device, a light splitting device, and a light converging element is provided. The first light source device provides first, second, and third light beams and a first compensation light beam. The light guide device reflects the first, second, and third light beams and the first compensation light beam. The light splitting device includes a first half reflecting element configured to reflect a part of a light beam and being pervious to another part of the light beam. The light converging element receives first and second combined light beams formed by the first, second, and third light beams and the first compensation light beam, where distances between light spots formed on the light converging element by the first and second combined light beams and a central axis of the light converging element are identical and greater than zero.

Provided is a Head Up Display (HUD) device for a vehicle, the device including: a plurality of light emitting devices; an image forming panel configured to generate an image based on light provided from the plurality of light emitting devices and output the image; a lens system arranged between the plurality of light emitting devices and the image forming device and configured to transmit light generated by the plurality of light emitting devices to the image forming panel; and a processor configured to control the plurality of light emitting devices and the image forming panel, wherein each of the plurality of light emitting devices is mounted to a circuit board by direct bonding.

A display apparatus comprises a light source device, an image data processing module, a light modulating device and an image synthesizing device. The light source device is configured to emit first light and second light. The image data processing module is configured to receive original image data of an image to be displayed, wherein the original image data of the image to be displayed is based on image data within a second color gamut range and comprises original control signal values of m colors of each pixel; the second color gamut range covers a first color gamut range and has a portion that exceeds the first color gamut range. The image data processing module is further configured to map the original control signal values of the m colors into m corrected control signal values corresponding to the first light and n corrected control signal values corresponding to the second light.

A projector according to the present disclosure includes a light source device, a plurality of light modulation devices, a combining prism, a support member, and a projection optical system. A first light modulation device includes a first light modulation panel having a first incident side substrate, a first exit side substrate, and a liquid crystal layer, a frame body which has a first opening part, and surrounds a side surface of the first incident side substrate and a side surface of the first exit side substrate, a second incident side substrate opposed to the first incident side substrate in the first opening part, an incident side member fixed to the second incident side substrate and the frame body, a support target member supported by the support member, and a holding member which is made elastically deformable.