JP2003186111A5 - - Google Patents

Claims (15)

An illumination device used for illuminating a light modulation means of a projector,
A light source, uniform illumination means for substantially uniforming the illuminance distribution of the illumination light in the illuminated area through a process of dividing light incident from the light source into a plurality of partial light beams, and light that can substantially transmit the plurality of partial light beams A dimming unit that has a transmission part and is arranged to be movable or rotatable, and adjusts the amount of light beam passing through the dimming unit by moving or rotating the dimming unit based on information from the outside An illumination device characterized by being made possible.   2. The polarization conversion means for performing polarization conversion by making the plurality of partial light beams incident thereon, wherein the light amount incident on the polarization conversion means can be adjusted by the light control means. Lighting device.   The illuminating device according to claim 1, wherein the dimming unit includes a light shielding plate having a plurality of openings.   The lighting device according to claim 3, wherein the light shielding plate includes a light shielding portion having light reflectivity.   5. The lighting device according to claim 3, wherein each of the openings has a shape corresponding to an outer shape of each partial light beam.   5. The illumination device according to claim 3, wherein each of the openings has a shape substantially including an outer shape of a plurality of partial light beams arranged in one direction.   The plurality of partial light beams are arranged in a matrix by the uniform illumination means, and each of the openings has a shape extending in a column direction or a row direction of the plurality of partial light beams. The lighting device according to claim 6.   The plurality of partial light fluxes are arranged radially with the illumination optical axis as a center by the uniform illumination means, and each of the openings has a shape extending in a radiation direction of the plurality of partial light fluxes. The lighting device according to claim 6. An illumination device used for illuminating a light modulation means of a projector,
Corresponding to the external shape of the light source, uniform illumination means having a rod-like or tubular light guide that makes the illuminance distribution of light incident from the light source substantially uniform in the illuminated area, and the light beam incident on the light guide It has a shape and a light transmission part that can substantially transmit the light beam, and is movable between the light source and the uniform illumination means in a direction substantially parallel to the illumination optical axis or a direction substantially perpendicular to the illumination optical axis. A light control means installed on the light source, and moves the light control means in a direction substantially parallel to the illumination optical axis or a direction substantially perpendicular to the illumination optical axis based on information from the outside, or the light control An illuminating apparatus characterized in that the amount of light beam passing through the dimming means can be adjusted by rotating the means about a rotation axis set in a direction substantially orthogonal to the illumination optical axis.   The lighting device according to claim 9, wherein the light control unit includes a light shielding plate having an opening, and the light shielding plate includes a light shielding portion having light reflectivity. An illumination device used for illuminating a light modulation means of a projector,
A light source, a light beam splitting unit that splits light incident from the light source into a plurality of partial light beams, a polarization conversion unit that is movably installed to perform polarization conversion by making the plurality of partial light beams incident, and an illuminated area And a polarization selection unit disposed on the incident side of the light source, and the polarization state of the light emitted from the polarization conversion unit can be controlled by moving the polarization conversion unit based on information from the outside. A lighting device.   The illuminating device according to claim 11, wherein the polarization conversion unit includes a polarization beam splitter array, and the polarization beam splitter array is moved in a polarization separation direction. A projector comprising: illumination means; light modulation means for modulating light emitted from the illumination means; and projection means for projecting light modulated by the light modulation means,
A projector comprising the illumination device according to claim 1 as the illumination unit.   Control signal determining means for determining a control signal for controlling the dimming means based on a video signal per frame constituting an image, and dimming for controlling movement or rotation of the dimming means based on the control signal 14. The projector according to claim 13, further comprising a control unit and a video signal expansion unit that expands the video signal based on the control signal. A projector driving method according to claim 13, comprising:
A control signal for controlling the dimming means is determined based on a video signal per frame constituting an image, and the light modulating means is controlled by controlling movement or rotation of the dimming means based on the control signal. Driving a projector characterized by adjusting the amount of light to be illuminated, expanding the video signal based on the control signal, and generating the video by supplying the expanded video signal to the light modulation means Method.