Light source device and projection display apparatus
AssigneePanasonic Projector & Display Corporation
InventorTakaaki Tanaka
Life of this patent
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Abstract
A light source device includes a red solid-state light source that emits red light, a green solid-state light source that emits green light, a blue solid-state light source that emits blue light, a second polarizing mirror that combines the red light emitted from the red solid-state light source with the green light emitted from the green solid-state light source, and a beam splitting element that splits the blue light emitted from the blue solid-state light source into transmitted light transmitting the beam splitting element and reflected light reflected on the beam splitting element, and transmits or reflects the combined red light and green light.
Claims10
A light source device comprising:
- a red solid-state light source configured to emit red light;
- a green solid-state light source configured to emit green light;
- a blue solid-state light source configured to emit blue light;
- a polarizing mirror configured to combine the red light emitted from the red solid-state light source with the green light emitted from the green solid-state light source;
- a beam splitting element configured to split the blue light emitted from the blue solid-state light source into transmitted blue light transmitted through the beam splitting element and reflected light reflected by the beam splitting element, and to transmit or reflect the combined red light and green light;
- and
- dichroic mirror configured to reflect the transmitted blue light transmitted through the beam splitting element in a first direction corresponding to a reflection direction of the beam splitting element,
- wherein the beam splitting element is further configured to reflect or transmit the red and green light combined by the polarizing mirror in the first direction, and
- wherein the dichroic mirror is further configured to transmit the red and green light combined by the polarizing mirror in the first direction.
Dependencies are inferred from the claim text.