A projector 10 includes an image forming panel 14 on which an image is formed, and a projection lens 15 which projects the image of the image forming panel 14 onto a screen 20. The center of the image forming panel 14 is fixed with being shifted in a direction opposite to a direction, in which a central position of a projection surface of the screen 20 is deviated with respect to an optical axis L of the projection lens 15. A lens barrel 31 of the projection lens 15 has an opening 34 as a heat release structure which is formed in a portion of a lens barrel 31 in a direction, in which the image forming panel 14 is shifted, on the image forming panel 14 side from a diaphragm position 32 where an F-Number of the projection lens 15 is determined.

A wavelength conversion device according to an aspect of the invention includes a rotary device having a rotary part rotating around an axis, a base member rotated around the axis by the rotary device, an inorganic wavelength conversion element provided to the base member, and a heat radiation member fixed to the base member, the heat radiation member has a ring-like shape surrounding the axis, and spreads outward in a radial direction of the axis beyond the base member, and the heat radiation member and the base member are formed separately from each other.

An artifact mitigation system includes a projector assembly and a set of imaging optics optically coupled to the projector assembly. The artifact mitigation system also includes an eyepiece optically coupled to the set of imaging optics. The eyepiece includes a diffractive incoupling interface. The artifact mitigation system further includes an artifact prevention element disposed between the set of imaging optics and the eyepiece. The artifact prevention element includes a linear polarizer, a first quarter waveplate disposed adjacent the linear polarizer, and a color select component disposed adjacent the first quarter waveplate.

Provided is a fluorescent wheel for a projector capable of suppressing the heating of the phosphor layer and a light emitting device for a projector using the same. The fluorescent wheel for a projector includes: a phosphor layer (12); an annular ceramic substrate (11) which includes a first principal surface provided with the phosphor layer (12) and a second principal surface located on an opposite side to the first principal surface and has a higher thermal conductivity than the phosphor layer (12); and a reflective layer (13) provided on the second principal surface of the ceramic substrate (11).

An image projector includes: a light source to emit light; an image forming element irradiated with the light from the light source and to form an image for projection onto a projection surface; a first controller activated when the image projector is in a waiting state; and a second controller that is not activated when the image projector is in the waiting state. In response to detection of an execution request for executing the image projector in the waiting state at the first controller, the first controller sets a power supply circuit with an initial voltage to start supplying power to the light source, and when the light source is lighted at the initial voltage, activates the second controller.

A device includes a housing having a top, a bottom opposite the top, a front, and a back opposite the front. One or more microphones are oriented substantially towards the top. A first camera, a display, a loudspeaker, and an emitter are oriented substantially towards the front. A second camera, a projector, and a sensor are oriented substantially towards the bottom. The second camera and the sensor may include field of views that at least partially overlap with a projection area of the projector.

A projection image display device includes: an optical element that separates incident light into a first color light beam and a second color light beam, synthesizes the first color light beam and the second color light beam to generate synthetic light, and emits the synthetic light; a first display panel that reflects and modulates the first color light beam; a second display panel that reflects and modulates the second color light beam; a first heat dissipator that dissipates heat of the first display panel; a second heat dissipator that dissipates heat of the second display panel; a light shielding portion that blocks a part of the second color light beam reflected by the second display panel from traveling toward the first display panel; a light shield heat dissipator that dissipates heat of the light shielding portion; and a container. The second heat dissipator is disposed outside the container.

A laser display system includes a red light semiconductor laser module (1), a green light semiconductor laser module (2), a blue light semiconductor laser module (3), a decoherence device (7, 8, 9), light valves (12, 13, 14), collimating and shaping devices (4, 5, 6), a heat dissipating modules (16-1, 16-2, 16-3), a temperature control module (17) and a semiconductor laser control module (18). The wavelength range output by the red light semiconductor laser module (1) is from 635 nm to 670 nm; the wavelength range output by the green light semiconductor laser module (2) is from 515 nm to 530 nm; the wavelength range output by the blue light semiconductor laser module (3) is from 440 nm to 460 nm.

An image projection device including: an analysis unit configured to compute a functional state of one or more devices included in the image projection device based on sensor information acquired from one or more sensors; a determination unit to determine whether or not maintenance of the devices is necessary based on the functional state of the devices; and a notification control unit to present guidance information that prompts for implementation of maintenance of the devices to a user through a notification unit at a timing when it is determined by the determination unit that maintenance is necessary.

A heat dissipating apparatus includes a heat sink, a first air moving device coupled to a first end of the heat sink, and a second air moving device coupled to a second end of the heat sink. The first air moving device drives an airflow to move through the heat sink in a direction and the second air moving device drives the airflow to move through the heat sink in the direction.