A liquid crystal device includes a reflection-type liquid crystal panel in which a first substrate provided with a reflective layer and a second substrate having light-transmissivity face each other via a liquid crystal layer. In the liquid crystal device, a λ/4 phase difference plate is arranged in an optical path in which light incident from the second substrate side is reflected by the reflective layer and emitted from the second substrate side, and a phase difference compensation layer such as a C plate and O plate provided integrally with the liquid crystal panel is provided in the optical path. The λ/4 phase difference plate is an inorganic material film provided on a second end surface facing the second substrate in the polarized light separating element. The phase difference compensation layer is an inorganic material film provided on a surface of the second substrate opposite to the liquid crystal layer.

An illuminator includes a first light source, a second light source, a first lens on which light emitted from the first and second light sources is incident, a second lens disposed in a downstream of the first lens, and a half wave plate. The first lens, the second lens and the half wave plate are arranged along a first axis. The first light source and the second light source are arranged along a plane perpendicular to the first axis. The half wave plate is disposed in the optical axis between the first lens and the second lens, the half wave plate being disposed in a position close to the second lens.

Disclosed is a monolithic LCD projector, including: a light source, a polarizer provided on a light emitting side of the light source and configured for converting light emitted from the light source into linearly polarized light, an LCD panel provided on a light emitting side of the polarizer and configured for modulating the linearly polarized light according to an image signal to generate modulated light, an analyzer provided on a light emitting side of the LCD panel and separated from the LCD panel and obliqued, the analyzer includes a reflective polarizer and a functional structure, and a lens provided in a reflected light path of the analyzer and configured for projecting the second polarization state light reflected by the reflective polarizer.

An apparatus for high dynamic range (HDR) modulation includes one or more lasers configured to transmit respective beams of laser light with a single color mode and a PLM optically coupled to the one or more lasers. The PLM is configured to modulate the laser light to produce a first modulated light. The apparatus also includes a phosphor optically coupled to the PLM and configured to receive at least a first portion of the first modulated light from the PLM and to emit a phosphor light with multiple color modes. At least one spatial light modulator (SLM) is also optically coupled to the phosphor and configured to modulate the multiple color modes in the phosphor light and the single color mode to project a second modulated light.

An excitation light intensity control system, including a lighting part, an imaging part and a control part. The lighting part includes a light source; the imaging part includes a light modulator and a color conversion element; the excitation light emitted from the light source is imported to the light modulator for modulation; the modulated excitation light excites the color conversion element to produce multicolor excited light; the lighting part further includes a light recycling system used for recoupling part of the excitation light emitted from the light modulator to be incident to the light modulator; the control part includes a controller used for receiving original image data and controlling the intensity of the excitation light emitted from the light modulator and/or the light source.

Embodiments of the present disclosure provide a laser array, a laser source, and a laser projection device, and relate to the field of laser display technologies. The laser array includes a light emitting portion for emitting a laser light beam; a light transmitting portion disposed along a light emitting direction of the light emitting portion for transmitting the laser light beam; where the light transmitting portion includes a first light transmitting region and a second light transmitting region, the first light transmitting region and the second light transmitting region are disposed such that light beams transmitting through the two regions have different polarization directions, which can reduce coherence of the laser light beam emitted from the laser array, thereby facilitating elimination of a speckle.

An illumination system and a projection apparatus including the illumination system are provided with a rotatable light splitting module, wherein when a light splitting element rotates, a first laser beam forms a first color light through a reflecting region of the light splitting element and a light combining element during a first time period, a second laser beam passes through the light combining element to form a second color light during the second time period and the fourth time period, the first laser beam forms a third color light by the wavelength conversion module and the light combining element after passing through the transmitting region of the light splitting element during the third time period, and the first color light, the second color light and the third color light from the light combining element form an illumination beam.

Provided is an illumination optical unit configured to illuminate an image display unit configured to display an image. The illumination optical unit includes: a light source configured to emit light; a lens unit configured to convert divergent light from the light source into approximately collimated light; and a light branching unit to which the light emitted from the lens unit is incident, and which branches an optical path into an optical path of illumination light propagating to the image display unit, and an optical path along which light from the image display unit propagates to a projection side. The light branching unit includes two or more emission/reflection planes configured to emit the illumination light.

In some embodiments, a polarizing beam splitter is provided. The beam splitter may comprise an optically transmissive spacer having first and second opposing faces, with a first polarizer on the first opposing face and a second polarizer on the second opposing face. The optically transmissive spacer may separate first and second triangular prisms of a cube-type beam splitter, with the first polarizer between the first triangular prism and the first opposing face of the spacer, and the second polarizer between the second triangular prism and the second opposing face of the spacer.

A projector according to the present disclosure includes: an illumination optical system; a separator; a first light valve; a second light valve; and a projection optical system. The illumination optical system generates illumination light. The separator separates the illumination light from the illumination optical system into first illumination light and second illumination light. The first light valve is illuminated with the first illumination light separated by the separator and generates first image light. The second light valve is illuminated with the second illumination light separated by the separator and generates second image light. The first image light generated by the first light valve and the second image light generated by the second light valve enter the projection optical system through the separator. The projection optical system projects the first image light that has entered the projection optical system toward a first display region and projects the second image light that has entered the projection optical system toward a second display region.