Cooling apparatus for projector casing

  • US 6,742,899 B1
  • Filed: 04/14/2003
  • Issued: 06/01/2004
  • Est. Priority Date: 04/17/2002
  • Status: Expired due to Fees
First Claim
Patent Images

1. A cooling apparatus for projector casing, comprising:

  • a casing having an interior;

    a lamp holder fixed in the interior of the casing, and having at least one guiding surface on one side near the lower edge of the lamp holder;

    a ventilation outlet disposed on the casing and proximate the side of the lamp holder;

    an upper sheet disposed at the top of the lamp holder and keeping a distance from the casing to define an upper air duct;

    a lower sheet disposed at the bottom of the lamp holder and keeping a distance from the casing to define a lower air duct; and

    a fan disposed adjacent to the lamp holder.

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