A liquid crystal projector includes a liquid crystal panel configured to generate a modulated image, a sensor configured to detect a temperature of the liquid crystal panel, an optical shift element configured to shift an emission optical path of the modulated image generated by the liquid crystal panel, and a control circuit configured to control a velocity of a shift in the optical shift element according to the temperature detected by the sensor.

A display apparatus of the present disclosure includes: an image detection unit that determines whether an empty second subframe is present in input image data, in addition to a first subframe that displays an image; a correction image generation unit that generates correction image data for correcting the input image data; a control unit that performs control to display the correction image data generated by the correction image generation unit during the period of the second subframe, when the image detection unit detects that the second subframe is present in the input image data; and a display panel that includes a light modulation device provided for each pixel, and modulates irradiation light from a light source, on the basis of input image data including the correction image data.

A light combining structure including a first beam splitter, a first light source, a second light source and a second beam splitter is provided. The first light source is disposed on a first side of the first beam splitter to emit a first light and is provided with a first reflection surface. The second light source is disposed on a second side of the first beam splitter to emit a second light and is provided with a second reflection surface. The second beam splitter is disposed on a third side of the first beam splitter, wherein the first beam splitter allows the first light and the second light to partially reflect and partially penetrate, and the first reflection surface, the second reflection surface and the second beam splitter allow the first light and the second light to enter a fourth side of the first beam splitter after being reflected.

A display device includes a diffractive optical element and a tunable light source operable in different states including a first state and a second state. The tunable light source provides first light having a first wavelength while the tunable light source is in the first state and second light having a second wavelength, distinct from the first wavelength, while the tunable light source is in the second state. The first wavelength and the second wavelength correspond to a first color band. The diffractive optical element is positioned to receive and redirect the first light and receive and redirect the second light. The diffractive optical element has a first focal length for the first light and a second focal length, distinct from the first focal length, for the second light.

A light source apparatus includes a light source section that outputs first light, a first polarization separator that separates the first light in terms of polarization, a second polarization separator that reflects in the second direction a portion of the first light polarized in the first polarization direction and transmits the other portion of the first light polarized in the first polarization direction, a diffusion element that diffuses the first light incident from the first polarization separator, a first wavelength converter that converts in terms of wavelength the portion of the first light incident from the second polarization separator and emits second light, and a second wavelength converter that converts in terms of wavelength the other portion of the first light incident from the second polarization separator and emits third light.

A multiplexed light field projector device and a multiplexed light field display to output a light field image is described. The projector has a projector base with a projection optical system configured to output light rays to form a projected image, a collimating optical system configured for collimation of the projected image light rays to form a second projected image, which is directed to a display optical system to produce a light field image. Light field projector devices or alternative projector devices may be used individually or in combination with one or more other projectors which can be arranged to form a multiplexed direct projection light field display. The arrangement of projector devices may have an individual or shared display optical system.

The disclosure provides an illumination system and a projection device applying the illumination system. The illumination system includes a laser light source, a wavelength conversion module, and a spot region modulation module configured to shift a transmission path of a laser beam. When the wavelength conversion module rotates, the spot region modulation module moves, in a first period of time, the laser beam in a wavelength conversion region of the wavelength conversion module along a first shift path, so that the laser beam forms a first spot region in an irradiation region in the wavelength conversion region. The spot region modulation module causes, in a second period of time, the laser beam to form a second spot region in an irradiation region in a non-conversion region of the wavelength conversion module. A size of the first spot region is greater than a size of the second spot region.

An illumination system includes a green light source, a red light source, a blue light source, and a thermoelectric cooler. The green light source includes multiple semi-conductor dies, and each of the semi-conductor dies has a power consumption of 8 W or larger. The thermoelectric cooler is thermally coupled to the red light source, and neither the green light source nor the blue light source is thermally coupled to a thermoelectric cooler.

A projector system includes a plurality of projectors. The plurality of projectors generates an image based on input video data, superimpose the image, and display a display image. The projector includes a video data processor and a liquid crystal display device. The liquid crystal display device switches the images for each frame and displays the images in a frame-sequential manner. The video data processor includes sub-frame data conversion tables and sub-frame data generators. The sub-frame data generators convert the video data into pieces of sub-frame data based on the sub-frame data conversion tables.

Provided is a light source system, including: an excitation light source emitting excitation light; a wavelength conversion device having conversion and reflective regions located in different planes and time-sequentially located in optical path of the excitation light, the conversion region configured for converting at least part of the excitation light into excited light, and the reflective region configured for reflecting the excitation light; collection lens assembly configured to guide light from the conversion region to propagate along first direction to obtain first light, and guide the excitation light from the reflective region to propagate along second direction to obtain second light; first guide device configured to guide the excited light in the first light to exit along first path; and second guide device configured to guide the second light to propagate along second path. The first guide device combines the excited light and the second light to obtain source light.