Projection display device
View Patent ↗A projection display device is provided with a main body cabinet; a projection port which is formed in the main body cabinet to guide modulated light to an outside of the projection display device; an air outlet which is formed at least in one of two surfaces of the main body cabinet facing each other across the projection port; and an exhaust unit which discharges, to the outside, air that has been warmed by heat exchange with a member to be cooled which is disposed in the main body cabinet through the air outlet. In this arrangement, the exhaust unit includes an exhaust fan, and a deflection member which deflects air discharged from the exhaust fan in a direction away from the projection plane.
1. A projection display device comprising:
a main body cabinet;
a projection port which is formed on a top surface of the main body cabinet to guide, to an outside of the projection display device, image light reflected on a reflection mirror;
a projection optical unit which reflects image light, generated by modulating light from a light source and projected from a projection lens unit, on the reflection mirror to project the image light through the projection port onto a projection plane, the projection plane being arranged diagonally forward above the main body cabinet;
an air outlet which is formed at least in one of right and left side surfaces of the main body cabinet, the air outlet being arranged in a position anterior to the projection port; and
an exhaust unit which discharges, to the outside, air that has been warmed by heat exchange with a member to be cooled which is disposed in the main body cabinet through the air outlet, wherein
the exhaust unit includes
an exhaust fan, and
a deflection member which orients, downward and backward from the main body cabinet, air discharged from the exhaust fan.
2. The projection display device according to claim 1 , wherein
the deflection member has a louver structure configured such that a plurality of louver portions are aligned with a predetermined interval, and
each of the louver portions includes a deflection surface inclined toward a direction in which the air is discharged from the exhaust fan, the discharged air being oriented when impinged on the deflection surface and discharged downward and backward from the main body cabinet.
3. The projection display device according to claim 2 , wherein
the deflection surface of the louver portion is formed into a concave curved surface.
4. The projection display device according to claim 2 , wherein
the exhaust fan is disposed adjacent to the light source, and
the exhaust unit further includes a light blocking member which blocks light from the light source from leaking through a space between adjacent louver portions toward the air outlet,
the light blocking member is disposed forward of the deflection member and includes a light blocking portion which covers the space, and
a portion of the light blocking member other than the light blocking portion is opened to pass air therethrough.
5. The projection display device according to claim 1 , wherein
the exhaust fan is inclined with respect to the main body cabinet in such a manner that the air discharged from the exhaust fan is away, from the image light emitted through the projection port, in a direction in parallel to the projection plane.
6. The projection display device according to claim 1 , wherein
the air outlet is formed in only one of the right and left side surfaces of the main body cabinet, and
the projection port is disposed at a position displaced in a direction away from the air outlet with respect to a middle position of the right and left side surfaces of the main body cabinet.
7. The projection display device according to claim 1 , wherein
the deflection member orients the air discharged from the exhaust fan in such a direction as to be away from the image light emitted through the projection port in a direction in parallel to the projection plane.
8. The projection display device according to claim 7 , wherein
the deflection member has a louver structure configured such that a plurality of louver portions are aligned with a predetermined interval, and
each of the louver portions includes a deflection surface inclined toward a direction in which the air is discharged from the exhaust fan, the discharged air being deflected oriented when impinged on the deflection surface and discharged downward and backward from the main body cabinet.
9. The projection display device according to claim 8 , wherein
the deflection surface of the louver portion is formed into a concave curved surface.
10. The projection display device according to claim 8 , wherein
the exhaust fan is disposed adjacent to the light source, and
the exhaust unit further includes a light blocking member which blocks light from the light source from leaking through a space between adjacent louver portions toward the air outlet,
the light blocking member is disposed forward of the deflection member and includes a light blocking portion which covers the space, and
a portion of the light blocking member other than the light blocking portion is opened to pass air therethrough.
11. The projection display device according to claim 7 , wherein
the exhaust fan is inclined with respect to the main body cabinet in such a manner that the air discharged from the exhaust fan is away, from the image light emitted through the projection port, in a direction in parallel to the projection plane.