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Projection apparatus and method of image projection

  • US 20020001044A1
  • Filed: 06/27/2001
  • Published: 01/03/2002
  • Est. Priority Date: 06/29/2000
  • Status: Abandoned Application
First Claim
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1. A projection apparatus for generating an image by projecting light representative of said image on to a display screen, said apparatus comprising at least one projector operable to receive a component signal representative of a component of said image and to project light representative of the component on to said display screen, said projector having an adjustment means for adjusting the relative position of the projected image component on the display screen in accordance with an adjustment signal, a convergence processor coupled to said adjustment means and operable to adjust a relative position of said image component on said display screen in response to α

  • measurement signal generated by a sensing device in response to a test projection received from said sensing device, wherein said sensing device is operable to produce a measurement signal having a predetermined output value when said relative position of said test projection is substantially optimum, and said convergence processor is operable to displace successively said test projection from a first position, until said value of said measurement signal corresponds to said predetermined output value, said adjustment signal being set in correspondence with said relative displacement of said test projection from said first position to the position at which said measurement signal corresponds to said predetermined output value.

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