A projector comprises as mounted on a chassis a light source, a projection lens for projecting light on a screen, dichroic mirrors positioned on an optical path from the light source for separating light into R, G and B, and a relay lens disposed on the longest of optical paths of R, G, B and interposed between the dichroic mirror and the projection lens for causing the light on the longest path to reach the projection lens. An adjusting mechanism is mounted on the chassis for moving the relay l...

A projector, which has a main body and a plurality of feet protruding from the main body to support the main body, includes a first adjuster that adjusts stepwise the amount of protrusion of at least one of the plurality of feet, and a second adjuster that infinitely and finely adjusts the amount of protrusion of at least one of the plurality of feet. The position of a projection image of the projector can be easily and speedily adjusted by coarsely adjusting the amount of protrusion of the foot...

The present invention is a projector having a photosensing means for detecting light entering the optical system from outside the optical system, wherein the photosensing means is capable of detecting only the light reflected from within a predetermined area on the screen. According to one aspect, the projector of the present invention includes a linear CCD as a photosensing means resulting in a long, thin area on a screen being detectable by the photosensing means.

In a projection display device 1, emergent light from an illumination optical system 80 is diffused by microlenses 101 provided in a liquid crystal light valve 100R. Emergent light from the liquid crystal light valve 100R diffused by these microlenses 101 is efficiently drawn into a projection optical system 60 whose f-number is set to be less than the f-number of the illumination optical system 80. As a result, it is possible to prevent light utilization efficiency from being deteriorated due t...

To provide a projector in which the position of a handle can be reliably maintained even when a housing and the handle are made of different materials. In a projector, the position of a handle is maintained with projections formed in the handle and contact portions of a lower casing being in contact with each other, and both the projections and the contact portions may be made of a same kind of material, such as resin. Therefore, there is no fear that one of the projections and the contact porti...

The invention concerns achieving an increase in illumination efficiency of an illumination optical system in a projector using an optical modulation device. A projector may include an optical modulation device for controlling a direction of emission of illumination light applied to a substantially rectangular light application surface, including a plurality of pixels, for each pixel according to image information to thereby emit image light representing an image, an illuminating optical system f...

A projector is provided that may include an enclosing structure for enclosing an optical path from an electro-optical apparatus to a projection lens, and an air circulation path connected to the enclosing structure and disposed in a flow path for cooling air. Thus, air inside the enclosing structure can be efficiently cooled while preventing the entry of dust or oil mist.

In an illumination optical system; a wavelength separating optical system; plural light modulation devices provided respectively so as to modulate the light in the plural wavelength regions according to a given image signal; a light synthesizing optical system for synthesizing the light modulated by the plural light modulation devices; a projection optical system for projecting the synthesized light emitted; and a reflecting mirror placed in the optical path. Light with a wavelength of approxima...

In a projection display provided with an optical unit, a power source unit, an external case to store the optical unit and the power source unit, a suction opening (75) is formed in one end part of the power source unit, a discharge opening (77) is formed in the other end part, and the suction opening (75) is arranged in the vicinity of an air inlet in the external case. Because the suction opening (75) and the discharge opening (77) are provided, the inside of the power source unit can be indep...

A projector has a shortened optical path from a light valve to a screen and a reduction in the depth size of its system and requires less space to mount. Rays of light emitted from a light valve of the projects are refracted by a converging lens and reflected by a plane mirror to converge at the primary focal point of an elliptical mirror, and then travel toward the secondary focal point whereat the focal point of a parabolic mirror also exists and a projection lens is disposed. The light rays p...