US Patent No. 10,174,926

LIGHT SOURCE UNIT AND COOLING METHOD OF THE LIGHT SOURCE UNIT


Patent No. 10,174,926
Issue Date January 08, 2019
Title Light Source Unit And Cooling Method Of The Light Source Unit
Inventorship Kenji Miyazaki, Tokyo (JP)
Assignee NEC DISPLAY SOLUTIONS, LTD., Tokyo (JP)

Claim of US Patent No. 10,174,926

1. A light source unit comprising:a light-tunnel-side circulation unit that accommodates a light tunnel that is irradiated by the output light of a solid-state light source;
a phosphor wheel-side circulation unit that accommodates a phosphor wheel that is excited by the emitted light of said light tunnel;
a first wall that is provided between said light-tunnel-side circulation unit and said phosphor-wheel-side circulation unit and that is provided with a window through which the emitted light of said light tunnel passes;
a light tunnel-side heat-receiving heat sink that is provided in said light-tunnel-side circulation unit;
a light tunnel-side circulation fan that supplies and circulates gas that has passed by way of said light-tunnel-side heat-receiving heat sink, through said light-tunnel-side circulation unit, and toward said light-tunnel-side heat-receiving heat sink;
a phosphor wheel-side heat-receiving heat sink that is provided in said phosphor-wheel-side circulation unit;
a phosphor wheel-side circulation fan that supplies and circulates gas that has passed by way of said phosphor wheel-side heat-receiving heat sink, through said phosphor-wheel-side circulation unit, and toward said phosphor wheel-side heat-receiving heat sink;
a heat-radiating heat sink that is connected to said light-tunnel-side heat-receiving heat sink and said phosphor wheel-side heat-receiving heat sink by means of a heat pipe; and
a cooling fan that cools said heat-radiating heat sink.