Self correcting projector
First Claim
1. A projector comprising:
- a spatial light modulation element; and
a projection optical system having an optical axis, wherein the spatial light modulation element automatically rotates about an axis parallel to the optical axis in response to an external parameter.
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Accused Products
Abstract
A projector for projecting images onto a screen which includes automatically adjusting the image to correct for horizontal slant. The projector includes a spatial light modulation element and a projection optical system including an optical axis. The spatial light modulation element is automatically rotated about the optical axis to correct for horizontal positioning of the projected image. In a first embodiment the spatial light modulation element is rotated about the optical axis utilizing a gravitational weight. In another embodiment the spatial light modulation element is rotated about the optical axis in response to a sensor signal. The projector also includes the ability to convert the image from a horizontal projection to a vertical projection in response to a changeover signal.
39 Citations
31 Claims
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1. A projector comprising:
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a spatial light modulation element; and a projection optical system having an optical axis, wherein the spatial light modulation element automatically rotates about an axis parallel to the optical axis in response to an external parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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- 9. A projector comprising an optical unit wherein the optical unit is positionally arranged within a housing, wherein the optical unit comprises a light source, a spatial light modulation element and a projection optical system including an optical axis, wherein the optical axis coincides with the center of the spatial light modulation element and wherein the optical unit is retained by the housing so as to freely rotate about the optical axis, and wherein the orientation in the horizontal direction of the optical unit is adjusted by a gravitational member coupled to the optical unit.
- 12. A projector that accommodates a light source, a spatial light modulation element, and a projection optical system within a housing, wherein, the optical axis of said projection optical system coincides with the center of said spatial light modulation element, wherein said housing is retained via a retaining member so as to freely rotate about an axis parallel to the optical axis, and the orientation in the horizontal direction of the housing is corrected by providing the housing with an automatic leveling function via a gravitational member.
- 15. A projector comprising a light source, a mount into which film is loaded, and a projection optical system wherein, the mount is retained by a retaining member so as to freely rotate about an optical axis of the projection optical system, and the orientation in the horizontal direction of the mount is corrected by providing the mount with an automatic leveling function via a gravitational member.
- 18. A projector comprising a spatial light modulation element, an automatic leveling mechanism that retains the spatial light modulation element so that it freely rotates about an optical axis of a projection optical system, a sensor which detects slant in the horizontal direction of the spatial light modulation element and automatically corrects the slant.
- 28. A projector comprising a dichroic mirror that resolves and composes polarized light waves, divided via a polarized beam splitter into the respective light colors of red, green, and blue, and a spatial light modulation element that, via picture image signals, modulates the respective colors of light resolved via the dichroic mirror and an automatic leveling mechanism that integrates the spatial light modulation element and dichroic mirror to form an optical block wherein the optical block rotates freely about an optical axis of a projection optical system wherein slant in the horizontal direction of the optical block is automatically corrected in response to signals from a sensor.
Specification