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US 9,261,761 B2Granted
Projection image display device
AssigneeMitsubishi Electric Corporation
InventorMakoto Kuriaki
Life of this patent
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Abstract
A projection image display device includes an indoor unit to be located indoors and an outdoor unit to be located outdoors. The outdoor unit includes a second refrigerant piping that forms a loop refrigerant path in combination with a first refrigerant piping, a cooling device, and a cooling control circuit that controls cooling for R, G, B laser heat sinks by the cooling device. The indoor unit includes a main control circuit that communicates with the cooling control circuit to control the cooling by the cooling device.
Claims6
A projection image display device that projects an image onto a screen, comprising:
- an indoor unit to be located indoors and to project said image;
- and
- an outdoor unit to be located outdoors, wherein
- said indoor unit includes:
- at least one semiconductor laser element group that is a light source for said image and includes a plurality of semiconductor laser elements;
- a heat sink that includes a metal block thermally connected to said plurality of semiconductor laser elements;
- and
- a first refrigerant piping thermally connected to said heat sink,
- said outdoor unit includes:
- a second refrigerant piping that forms a loop refrigerant path in combination with said first refrigerant piping through a refrigerant piping located between said indoor unit and said outdoor unit;
- a cooling device that includes a refrigerant compressor, a condenser, and a fan and performs a cooling for said heat sink through a refrigerant circulating in said refrigerant path;
- and
- a cooling control circuit that controls said cooling by said cooling device, and
- said indoor unit further includes a main control circuit that communicates with said cooling control circuit through a communication path located between said indoor unit and said outdoor unit to control said cooling by said cooling device.
11 more elements
Dependencies are inferred from the claim text.