A projector is provided which is able to facilitate a reduction in size. The projector includes of a lamp information carrier circuit board and a lamp information detection circuit board, and a fuse for determining use and nonuse of a light source lamp. The lamp information carrier circuit board is stacked so as not to overlap the lamp information detection circuit board. For this reason, the lamp information carrier circuit board and the lamp information detection circuit board are stacked clos...

A projector which can have a low profile and a reduced size. Fixing parts for fixing a mounting part to a lower light guide are disposed at the periphery of the mounting part. The mounting part is not required to be sufficiently thick so that a fixing unit such as a threaded hole can be formed therein. Therefore, the thickness of the mounting part can be reduced, thereby reducing the overall height of the projector, whereby a low-profile and reduced-size projector is possible.

To reduce inconsistencies in an image to be displayed in a projector. At least one of a polarizer on the side of a light incident surface and a polarizer on the side of a light emitting surface is bonded on a sapphire glass plate. The sapphire glass plate may preferably be formed of single-crystal sapphire. In addition, the sapphire glass plate may preferably be held by a holding frame made of metal. The sapphire glass plate and the holding frame made of metal may preferably be bonded by an adhe...

A projector 1 has a first casing 1A (including a first part 2 and a second part 3) and a second casing 1B (including a third part 4). The second casing 1B is moved between an enlarging position where the second casing 1B is protruded from the first casing 1A and a reducing position where the second casing 1B is retracted into the first casing 1A. As the second casing 1B moves to the enlarging position, the distance between the exhaust ports 45 and the exhaust fan 9 increases, so that the wind no...

A projector has an illuminating optical system for irradiating white light, a color switching optical system for dividing the white light irradiated by the illuminating optical system into color lights in a time-division manner, a DMD.TM. for modulating the respective color lights in accordance with an image signal, a projection optical system for projecting the light beam modulated by the DMD, a light-composite optical system for getting the light beam not incident on the projection optical sys...

A power supply unit is formed so as to be divided into first and second power supply blocks, which are disposed on both sides of a projecting lens. This allows the power supply blocks to be efficiently disposed in a projection display device, so that dead space is not easily formed in the projection display device, making it possible to reduce the size of the projection display device. First and second power supply block cooling paths are formed at first and second power supply blocks which are ...

In a projector, the precision of color synthesis is improved and the generation of vertical stripes in the projected image is suppressed by a dichroic prism used for color synthesis that employs at least the following aspects. (1) The dichroic prism is formed using triangular prisms, in which projections or grooves are provided that have two faces parallel to two pasted faces of the triangular prisms, the projections or grooves being integrally injection-molded on faces of the triangular prisms ...

A technique capable of easily manufacturing a projector without deteriorating too much the optical characteristics of the projector. A projector includes an illuminating optical system for emitting illumination light, an electro-optical device for modulating light from the illuminating optical system according to image information, and a projection optical system for projecting a modulated light beam flux obtained by the electro-optical device. The electro-optical device includes a single-crysta...

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 for image projection, includes: an optical element included by an optical system to project an image; a tripod that supports the projector; and a tripod-fixing part that is connected with the optical element and fixes the tripod, wherein the tripod and tripod-fixing part are each constituted by a heat-conductive member.