Abstract: Belt-like regions illuminated by red, green and blue light beams are formed on an image display panel, and the illuminated regions are moved continuously. Each pixel of the image display panel is driven by a signal corresponding to the color of light entering the pixel. This makes it possible to display a color image with only one image display panel having neither a color filter nor a pixel exclusively for the respective light beams. The adjacent regions illuminated by two colors of light are overlapped partially, and the pixels in the overlapping portions are driven by a brightness signal component. By overlapping the adjacent illuminated regions, a focused area of the light beams can be enlarged, achieving a smaller focusing optical system, making it possible to reduce the size of the entire device.

Abstract: Three colors of light beams from a light source travel via a first optical system to strike a reflecting surface of a rotating polygon mirror, or mirrors, at different angles without overlapping. The rotating polygon mirror or mirrors reflect the light beams for scanning. The reflected light beams enter a second optical system at different angles to illuminate an image display panel at different portions. On the image display panel, belt-like regions illuminated by the light beams of individual colors are formed in parallel with each other, and these illuminated regions are moved continuously by scanning. A formed color image is magnified and projected by a projection optical system. With such a projection type image display apparatus, a display having high resolution and light efficiency that is also small, thin and inexpensive is achieved.

Abstract: Red, green and blue light beams from, a light source portion travel via a first optical system and enter a reflecting surface of a rotating polygon mirror at different angles so as not to overlap each other. The rotating polygon mirror makes these light beams perform scanning when reflecting these light beams. The light beams for the scanning enter a second optical system at different angles and are led to different positions on an image display panel. The second optical system forms an image that is rotated by 90° from that on the rotating polygon mirror on the image display panel. On the image display panel, belt-like regions illuminated by the light beams of individual colors are formed in parallel with each other, and these illuminated regions are moved continuously by the scanning. Each pixel of the image display panel is driven by a signal corresponding to a color of light entering this pixel. A formed color image is magnified and projected by a projection optical system.

Abstract: Light beams of red, green and blue from a light source portion (201) travel via a first optical system (202) and enter a reflecting surface of a rotating polygon mirror (212) so as not to overlap each other and at different angles from each other with respect to a rotation direction of the rotating polygon mirror. The rotating polygon mirror (212) makes the light beams of the respective colors perform a scanning while reflecting these light beams. The scanned light beams enter a second optical system (203) at different angles from each other and are led to different positions on an image display panel (204). The light beams of the respective colors form belt-like illuminated regions that are parallel with each other on the image display panel (204), and the illuminated regions move continuously by the above-mentioned scanning. Each pixel of the image display panel is driven by a signal corresponding to a color of light entering this pixel, thereby displaying a color image.

Abstract: Randomly polarized light from a light source (106) enters a polarization separation section (103) through an integrator optical system (102) including a second lens plate (110) designed to have variant apertures. The polarization separation section (103) separates the incident light into two polarized lights whose polarization directions are orthogonal to each other. Then, the polarization directions of these polarized lights are aligned by a polarization conversion section (104). Thus, a polarized-light illumination unit in which polarization directions of randomly polarized light is converted into a desired polarization direction and at the same time the spread of illumination light can be suppressed can be obtained.

Abstract: The present invention provides a presentation system, a display device, and a program which realize a smoother presentation performance in case where information a presenter wishes to refer to is displayed in a terminal but not in a display device. The presentation system of the present invention is structured, for instance, by connecting a PC 100 and a projector 200 via a LAN 50. A display unit of the PC 100 can be set up to display information including, for example, explanatory notes, but when making the projector 200 display an image, the information will not be displayed by executing a data modification which makes the information invisible. The information such as the explanatory notes may be placed at an arbitrary location on the display unit 102 and this enables a smoother presentation performance.

Abstract: Red, green and blue light beams from a light source portion travel via a first optical system and enter a reflecting surface of a rotating polygon mirror at different angles so as not to overlap each other. The rotating polygon mirror makes these light beams perform scanning when reflecting these light beams. The light beams for the scanning enter a second optical system at different angles and are led to different positions on an image display panel. The second optical system forms an image that is rotated by 90° from that on the rotating polygon mirror on the image display panel. On the image display panel, belt-like regions illuminated by the light beams of individual colors are formed in parallel with each other, and these illuminated regions are moved continuously by the scanning. Each pixel of the image display panel is driven by a signal corresponding to a color of light entering this pixel. A formed color image is magnified and projected by a projection optical system.

Abstract: Belt-like regions illuminated by red, green and blue light beams are formed on an image display panel, and the illuminated regions are moved continuously. Each pixel of the image display panel is driven by a signal corresponding to the color of light entering this pixel. This makes it possible to display a color image with only one image display panel having neither a color filter nor a pixel exclusively for the respective light beams. The adjacent regions illuminated by two colors of light are overlapped partially, and the pixels in the overlapping portions are driven by a brightness signal component. By overlapping the adjacent illuminated regions, a focused area of the light beams can be enlarged, achieving a smaller focusing optical system, making it possible to reduce the size of the entire device. In addition, by using the light of the overlapping portions for the display of a brightness component, the light from a light source portion can be utilized effectively, achieving a still higher brightness.

Abstract: An image display apparatus is provided for enlarging and projecting a light emitted from a plurality of self-emitting elements on a screen by beam scanning means, which is an image display apparatus having little or no luminance unevenness by solving the conventional problem of causing luminance unevenness in images projected on the screen due to a variance in luminance characteristics of each self-emitting element. It is configured such that a part of the light scanned on the screen from the beam scanning means is provided to a photodetector element that converts the intensity of the light into an electric signal so as to correct a driving signal to be supplied to the self-emitting element by the intensity of the light detected by this photodetector element.

Abstract: A light source for emitting a white light in one direction, color light separating means for separating the white light from the light source into three color lights of red light, blue light and green light, modulating means including liquid crystal light valves for modulating the polarized lights contained in the luminous fluxes from the color light separating means, and producing a video image, color light combining means for combining the modulated luminous fluxes after being modulated by the modulating means, and projection optical means for projecting the combined luminous flux obtained by the color light combining means on a screen. A polarizer is disposed at the light exit side of the modulating means.

Abstract: In a projection type image display device for combining an image by dichroic mirrors in a form of parallel plane plate, a projected image of high picture quality is presented by suppressing the astigmatism. In a projection type image display device comprising a light source for emitting blue light, green light, and red light, liquid crystal panels for modulating individual color lights, dichroic mirrors for combining the modulated lights, dichroic mirrors for combining the modulated lights, and a projection lens for projecting the combined light, the dichroic mirrors are disposed obliquely on a first plane including an optical axis linking the projection lens and liquid crystal panels, and a parallel plane plate for correcting astigmatism is disposed obliquely on a second plane orthogonal to the first plane.

Abstract: In a light valve projection type image display device, a lighting device suitable for a device making use of polarization in particular is presented. A lighting device transformed in the direction of polarization comprising a light source, an elliptical mirror, polarized light selecting means positioned at a second focal point position of the elliptical mirror, collimating for transforming the light from the second focal point of the elliptical mirror into nearly parallel light while reflecting, polarization transforming provided in the collimating, and optical path transforming having an aperture in the central part is provided. The light is separated into first and second directions of polarization by the polarized light selecting. The light in the second direction of polarization is enters the collimating and the direction of polarization is transformed in the same direction as the light of the first direction of polarization.

Abstract: A projection type image display apparatus of a single plate system using a single liquid crystal panel featuring compactness, light weight and high brightness is provided. The apparatus comprises a liquid crystal unit, a first filter located on the light incident side of a first picture element to be driven according to a first color signal and provided with the ability to pass light of a first wavelength only, a second filter located on the light incident side of a second picture element to be driven according to a second color signal and provided with the ability to pass light of a second wavelength only, a microlens array with a plurality of microlenses, each of which measures three times the dimension of each picture element, a reflective layer characterized by reflecting the second wavelength light and third wavelength light at places other than the place where the light from the microlens passes through, an illumination system, and a light projection system.

Abstract: There is disclosed a liquid-crystal projection apparatus having a lamp device which has such a sealed or closed construction that a sound, produced upon bursting of a light-emitting tube, is suppressed and that the scattering of glass pieces is prevented. In this liquid-crystal projection apparatus, a lamp is sealed by a support member, supporting a concave mirror having two notches and an outer casing and a flat glass panel and an air passage is formed in the support member. The lamp is releasably attached to a lamp fixing member and two open portions are formed in this lamp fixing member and a cooling fan is fixedly connected to one of the two open portions.

Abstract: A projection type image display apparatus using a small light valve, particularly a liquid crystal light valve, to achieve high brightness, a sharp contrast and excellent uniformity in image displaying. The apparatus includes a light source with a light emitting area, an oval mirror to reflect the light from the light source and a light valve to control the reflected light. The oval mirror possesses two focal points, a first focal point located on one side of the light valve near the oval mirror and a second focal point located on the opposite side of the light valve. The light emitting area is situated at a position so as to include the first focal point of the oval mirror. When the distance, from the first focal point to the light valve which governs the effective light flux area of the light valve is defined as `L` and the distance from the first focal point to the second focal point is defined as `2C`, the relationship between `L` and `C` satisfies the following inequality:0.6<(L/C(<1.1.

Abstract: An optical system for a rear projection picture display has reduced size while maintaining screen size. Two plane mirrors are provided along a light path between a picture display unit and a screen. The first plane mirror at a projection lens side is made of a reflecting polarizer and is located along a light path between the second plane mirror and the screen. The two plane mirrors are set in a relative angle so that the incident angle of the light traveling from the projection lens to the first plane mirror is large as compared with the incident angle of the light traveling from the second plane mirror to the first plane mirror. A polarizing plate is attached at the rear side of the screen.

Abstract: A picture display apparatus which converts an input optical image into a projected picture using a photoelectric effect. The picture display apparatus includes an image transfer device having a plurality of graded index lenses which are bundled in parallel to an optical axis. The image transfer device is provided between an electro-optical device and a picture display device so that an input optical image on the picture display device is transferred in equisize onto the photoconductive layer of the electro-optical device.