Abstract: An image projection apparatus having an adjuster mechanism with a projecting member projecting from a bottom surface of the case to adjust the elevation angle of a projection lens and an opening/closing member located at a front surface of said projection lens for opening or closing the projection opening. The adjuster mechanism uses an electric motor to move the projecting member up and down. The opening/closing member is opened/closed using a linkage mechanism linked to the adjuster mechanism.

Abstract: A projector for projecting an image to an external screen in which an optical unit, includes rectangular liquid crystal panels disposed such that the short sides thereof are substantially parallel with a plane including principal light beams of the respective color light beams to be composited by a prism. Transmission cables are drawn out from the short sides of the respective liquid crystal panels, and a cooling fan is disposed such that the direction of cooling air is approximately parallel with the long sides of the liquid crystal panels.

Abstract: An image projection apparatus having an adjuster mechanism with a projecting member projecting from a bottom surface of the case to adjust the elevation angle of a projection lens and an opening/closing member located at a front surface of said projection lens for opening or closing the projection opening. The adjuster mechanism uses an electric motor to move the projecting member up and down. The opening/closing member is opened/closed using a linkage mechanism linked to the adjuster mechanism.

Abstract: An image projection apparatus of the present invention provided with a case 21 a projection lens 38 for projecting an image from a projection opening 2h of the case; an opening/closing plate 3 for opening or closing the projection opening 2h for the protection of the projection lens 38; an adjuster mechanism 50 having a projecting member 20 projecting from a bottom surface of the case 2 to adjust an elevation angle and adjusting the projection amount of the projecting member 20 to adjust the elevation angle of the projection lens 38; a control device 30 for controlling the drive of an adjuster mechanism 50; an electric motor 51; and a linkage mechanism 60 for operating the opening/closing plate 3 for opening or closing the projection opening in accordance with an elevation of the projecting member 20, wherein the elevation angle of the case 2 is adjusted by moving up and down the projecting member 20, the opening/closing plate 3 is operated in accordance with the movement of the projecting member 20 to open a

Abstract: A reflection type projector apparatus uses polarized beam filters that are resistant to fluctuations in incident angle as the light beam splitting elements and in which, are provided for the blue color beam a blue color use liquid crystal reflection panel, a polarized beam filter, a linear polarization plate, and a ½ wavelength plate arranged at one side face of a cross prism, with a blue color beam emitted toward the blue color use liquid crystal reflection panel. The blue color beam passes through the polarized beam filter, striking the blue color use liquid crystal reflection panel, and is modulated when reflected. The blue color modulated beam is reflected toward the cross prism at the polarized beam filter, and then passes through the linear polarization plate and the ½ wavelength plate, strikes the cross prism, and is projected to the screen by a projection lens.

Abstract: A projector for projecting an image to an external screen in which an optical unit, includes rectangular liquid crystal panels disposed such that the short sides thereof are substantially parallel with a plane including principal light beams of the respective color light beams to be composited by a prism. Transmission cables are drawn out from the short sides of the respective liquid crystal panels, and a cooling fan is disposed such that the direction of cooling air is approximately parallel with the long sides of the liquid crystal panels.

Abstract: There is provided an illuminator to emit trichromatic light. It includes a lamp (1) which emits trichromatic light including components whose wavelengths correspond to three primary colors, respectively, and a wavelength-selective optical aperture filter (22) provided at the side of the lamp (1) from which the light of three primary colors go out and consisting of zones working as predetermined optical apertures of which one selectively attenuates or shields a component included in the trichromatic light and having a wavelength corresponding to at least one of the three primary colors while the others allow the light components whose wavelengths correspond to the other primary colors to pass through.

Abstract: There is provided an illuminator to emit trichromatic light. It includes a lamp (1) which emits trichromatic light including components whose wavelengths correspond to three primary colors, respectively, and a wavelength-selective optical aperture filter (22) provided at the side of the lamp (1) from which the light of three primary colors go out and consisting of zones working as predetermined optical apertures of which one selectively attenuates or shields a component included in the trichromatic light and having a wavelength corresponding to at least one of the three primary colors while the others allow the light components whose wavelengths correspond to the other primary colors to pass through.

Abstract: A projection type liquid crystal display apparatus includes at least three transmission type liquid crystal display panels and a four-division dichroic prism. The three liquid crystal display panels are driven by image signals of three primary colors respectively and the three liquid crystal display panels are illuminated by three primary color lights respectively so as to obtain transmission image lights having three channels whose luminances are modulated. The dichroic prism is used so as to synthesize the transmission image lights and the synthesized image light is projected via a projecting lens.