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DLP optical system

  • US 20070035701A1
  • Filed: 08/10/2006
  • Published: 02/15/2007
  • Est. Priority Date: 08/12/2005
  • Status: Active Grant
First Claim
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1. A DLP (digital light processing) optical system comprising:

  • a lamp unit for providing light;

    an optical engine unit optically connected with the lamp unit, having optical parts for converting light incident from the lamp unit into an image signal therein, and including a primary lens for transmitting the image signal;

    a DMD (digital micro mirror device) for reflecting the image signal transmitted from the primary lens;

    a prism formed closely to the DMD, for adjusting a path of light;

    a projection lens for projecting an on-beam of light from the prism that contributes to image forming onto a screen; and

    a light-blocking part provided on an incident side of the projection lens, for transmitting only the on-beam and shielding at least light of a flat state region located between the on-beam and an off-beam.

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