US 8,128,236 B2 · Image projecting apparatus

Abstract

Disclosed is an image projecting apparatus having a cooling device, which cools heat generated from a plurality of light sources respectively emitting light of different colors and heat generated from a display device simultaneously, while effectively dispersing the heat. The image projecting apparatus includes a projecting system which projects light; a display device disposed in series with the projecting system; an optical system disposed in parallel with the projecting system, and including a plurality of light sources which transmit the light to the display device and generate heat when the light is transmitted to the display device; a heat dissipation device disposed at an outer edge of the optical system which dissipates the heat generated from the plurality of light sources; and a cooling fan disposed opposite to the display device, which inhales air and discharges the air to the heat dissipation device.

Claims28

Dependent claims

An image projecting apparatus comprising:

a projecting system which projects light;
a display device disposed in series with the projecting system along a first axis;
an optical system disposed in parallel with the projecting system in a direction parallel to a second axis perpendicular to the first axis, and including a plurality of light sources which transmit the light to the display device and generate heat when the light is transmitted to the display device;
a heat dissipation device, disposed at an outward-facing side of the optical system to dissipate the heat;
and
a cooling fan disposed adjacent to the display device, which inhales air across the display device to cool the display device and discharges the air across the heat dissipation device in the direction parallel to the second axis to cool the heat dissipation device.

3 more elements

An image projecting apparatus comprising:

a projecting system which projects light;
a display device disposed in series with the projecting system along a first axis;
an optical system disposed in parallel with the projecting system in a direction parallel to a second axis perpendicular to the first axis, and including a plurality of light sources which transmit the light to the display device;
a light source driving part which drives the plurality of light sources;
an interface circuit board having at least one input port;
a main circuit board which controls the light source driving part and the interface circuit board;
a heat dissipation device, disposed at an outer edge of the optical system, which collects and dissipates heat generated from the plurality of light sources, the light source driving part, the interface circuit board, and the main circuit board;
and
a cooling fan which cools the display device and the heat dissipation device by inhaling air across the display device and exhaling air across the heat dissipation device.

6 more elements

Dependencies are inferred from the claim text.

Image projecting apparatus

Life of this patent

Image projecting apparatus

Life of this patent

Abstract

Claims28