US 2011/0211172 A1 · PROJECTION IMAGE DISPLAY DEVICE

Abstract

The present invention provides a projection image display device capable of both minimizing a decrease in a cooling ability and simplifying maintenance of a filter. The projection image display device according to the present invention includes a filter material for filtering external air taken into a casing, a loop-shaped filter frame onto which the filter material is mounted, a drive mechanism for rotating the filter frame in a loop direction of the loop shape, and a dust removal brush to be brought into contact with the filter material while spinning at a predetermined position. The filter material is mounted onto a part of a loop-shaped surface of the filter frame. The filter material is not mounted but a ventilation part is provided in the other part of the loop-shaped surface of the filter frame.

Claims10

Dependent claims

A projection image display device comprising:

a casing in which an image display device part is arranged;
a first filter material for filtering external air taken into said casing;
a loop-shaped filter frame onto which said first filter material is mounted, the filter frame having first and second surfaces facing each other;
a drive mechanism for rotating said filter frame in a loop direction of said loop shape;
and
a dust removal brush to be brought into contact with said first filter material while spinning at a predetermined position, wherein
said first filter material is mounted onto said first surface of said filter frame, and
said first filter material is not mounted but a ventilation part is provided in said second surface of said filter frame.

5 more elements

Dependencies are inferred from the claim text.

Projection image display device

Life of this patent

Projection image display device

Life of this patent

Abstract

Claims10