US 7,320,524 B2
Projector and air filtration device thereof
Hsuan-Cheng Lee, Kaohsiung (Taiwan); and Chang-Chien Li, Taoyuan (Taiwan)
Assigned to Benq Corporation, Taoyuan Shien (Taiwan)
Filed on May 10, 2005, as Appl. No. 11/126,133.
Claims priority of application No. 93113203 A (TW), filed on May 11, 2004.
Prior Publication US 2005/0254021 A1, Nov. 17, 2005
Int. Cl. G03B 21/26 (2006.01); G03B 21/22 (2006.01); G03B 21/00 (2006.01); A47B 8/10 (2006.01); F24F 13/08 (2006.01)
U.S. Cl. 353—60  [353/119; 312/10.1; 454/358; 454/367] 14 Claims
OG exemplary drawing
 
1. A projector, comprising:
a casing; and
an air filtration device, disposed within the casing and including:
a holder;
a filter; and
a rack movably disposed in the holder for supporting the filter; wherein when the rack moves to a first position, the rack is received within the holder, and when the rack moves from the first position to a second position, the filter is released from the rack for replacement wherein the rack further includes:
a first frame; and
a second frame, pivotally connected with the first frame; wherein the filter is disposed between the first frame and the second frame.