In a projector using a digital image generator of rectangular form, such as a digital micro-mirror device (DMD), the input light beam striking the image generator defines a beam section of greater sectional area than an intended circular beam, so as to increase the number of digital elements of the image generator contributing to the light beam output. An optical arrangement, such as a mask, defines the beam section, which may be elliptical, or pincushion like, rather than circular. A lens, or other optical component, corrects the beam shape produced by the mask to the circular beam shape. Alternatively, a fiber-optic bundle replaces the mask and lens arrangement.
Inventor(s) WILLSON PETER WYNNE [GB]
Applicant(s) WILLSON PETER WYNNE
Classification International: G02B26/08; H04N5/74; H04N9/31; (IPC1-7): G09G3/00; Cooperative G02B26/0833; H04N5/7458; H04N9/3114; H04N9/3152
Priority Numbers: GB20010029494 20011210; WO2002GB05580 20021210
Also Published: GB2382880 (A); WO03055208 (A1); EP1454483 (A1); CA2469590 (A1); AU2002352367 (A1)
Publication Date Apr 14 2005
Filing Date Dec 10, 2002