Light source device and projection display apparatus
View Patent ↗The light source device includes a first solid-state light source array emitting a first color light, a second solid-state light source array emitting a second color light, a third solid-state light source array emitting a third color light, and a light combiner for combining the first to third color lights respectively from the first to third solid-state light source arrays into a combined color light, and emitting a light flux of the combined color light in the same direction. The third solid-state light source array requiring the lowest target cooling temperature among the first to third solid-state light source arrays is disposed on a first side, and the first and second solid-state light source arrays are disposed on a second side, with an optical axis of the light flux emitted from the light combiner, as a boundary.
1. A light source device comprising:
a first solid-state light source array emitting a first color light;
a second solid-state light source array emitting a second color light;
a third solid-state light source array emitting a third color light; and
a light combiner for combing the first to third color lights emitted respectively from the first to third solid-state light source arrays into a combined color light, and emitting a light flux of the combined color light in a same direction;
wherein with an optical axis of the light flux emitted from the light combiner, as a boundary,
the third solid-state light source array requiring a lowest target cooling temperature among the first to third solid-state light source arrays is disposed on a first side, and
the first solid-state light source array and the second solid-state light source array are disposed on a second side,
wherein the first solid-state light source array is a blue solid-state light source array including a blue laser diode emitting blue light as the first color light,
the second solid-state light source array is a green solid-state light source array including a green laser diode emitting green light as the second color light, and includes first and second green solid-state light source arrays,
the third solid-state light source array is a red solid-state light source array including a red laser diode emitting red light as the third color light, and includes first and second red solid-state light source arrays,
the first green solid-state light source array and the first red solid-state light source array are disposed to confront each other, and
the second green solid-state light source array and the second red solid-state light source array are disposed to confront each other.
2. The light source device according to claim 1 , further comprising cooling mechanisms each of which is disposed adjacent to each of the first to third solid-state light source arrays, and further comprising a Peltier element for cooling disposed adjacent to the third solid-state light source.
3. The light source device according to claim 1 , wherein the light combiner comprises:
a half mirror which the blue light from the blue solid-state light source array enters;
a mirror reflecting blue light passing through the half mirror;
a first dichroic mirror reflecting the green light from the first green solid-state light source array, and transmitting blue light reflected by the half mirror;
a second dichroic mirror reflecting the red light from the second red solid-state light source array, and transmitting the blue light and the green light from the first dichroic mirror;
a third dichroic mirror reflecting the red light from the first red solid-state light source array, and transmitting the blue light reflected by the mirror; and
a fourth dichroic mirror reflecting the green light from the second green solid-state light source array, and transmitting the blue light and the red light from the third dichroic mirror.
4. A light source device comprising:
a first solid-state light source array emitting a first color light;
a second solid-state light source array emitting a second color light;
a third solid-state light source array emitting a third color light; and
a light combiner for combing the first to third color lights emitted respectively from the first to third solid-state light source arrays into a combined color light, and emitting a light flux of the combined color light in a same direction;
wherein with an optical axis of the light flux emitted from the light combiner, as a boundary,
the third solid-state light source array requiring a lowest target cooling temperature among the first to third solid-state light source arrays is disposed on a first side, and
the first solid-state light source array and the second solid-state light source array are disposed on a second side,
wherein the first solid-state light source array is a blue solid-state light source array including a blue laser diode emitting blue light as the first color light,
the second solid-state light source array is a green solid-state light source array including a green laser diode emitting green light as the second color light, and includes first and second green solid-state light source arrays,
the third solid-state light source array is a red solid-state light source array including a red laser diode emitting red light as the third color light, and includes first and second red solid-state light source arrays, and
the second green solid-state light source array and the first red solid-state light source array are disposed to confront each other.
5. The light source device according to claim 4 , wherein the light combiner comprise:
a half mirror which the blue light from the blue solid-state light source array enters;
a mirror reflecting blue light passing through the half mirror;
a first dichroic mirror reflecting the green light from the second green solid-state light source array and transmitting blue light reflected by the half mirror;
a second dichroic mirror reflecting the red light from the second red solid-state light source array, and transmitting the blue light and the green light from the first dichroic mirror;
a third dichroic mirror reflecting the green light from the first green solid-state light source array, and transmitting the blue light reflected by the mirror; and
a fourth dichroic mirror reflecting the red light from the first red solid-state light source array, and transmitting the blue light and the green light from the third dichroic mirror.
6. The light source device according to claim 1 , wherein the light combiner comprises:
a half mirror which the blue light from the blue solid-state light source array enters;
a first mirror reflecting blue light passing through the half mirror;
a second mirror reflecting the red light from the first red solid-state light source array;
a third mirror reflecting the red light from the second mirror;
a first dichroic mirror reflecting the green light from the second green solid-state light source array, and transmitting blue light reflected by the half mirror;
a second dichroic mirror reflecting the red light from the third mirror, and transmitting the blue light and the green light from the first dichroic mirror;
a third dichroic mirror reflecting the green light from the first green solid-state light source array, and transmitting the blue light reflected by the first mirror; and
a fourth dichroic mirror reflecting the red light from the second red solid-state light source array, and transmitting the blue light and the green light from the third dichroic mirror.
7. A light source device comprising:
a first solid-state light source array emitting a first color light;
a second solid-state light source array emitting a second color light;
a third solid-state light source array emitting a third color light; and
a light combiner for combing the first to third color lights emitted respectively from the first to third solid-state light source arrays into a combined color light, and emitting a light flux of the combined color light in a same direction;
wherein with an optical axis of the light flux emitted from the light combiner, as a boundary,
the third solid-state light source array requiring a lowest target cooling temperature among the first to third solid-state light source arrays is disposed on a first side, and
the first solid-state light source array and the second solid-state light source array are disposed on a second side,
wherein the first solid-state light source array is a blue solid-state light source array including a blue laser diode emitting blue light as the first color light,
the second solid-state light source array is a green solid-state light source array including a green laser diode emitting green light as the second color light, and includes first and second green solid-state light source arrays,
the third solid-state light source array is a red solid-state light source array including a red laser diode emitting red light as the third color light, and includes first and second red solid-state light source arrays,
the first red solid-state light source array is disposed in a position confronting a middle point between a blue solid-state light source array and the first green solid-state light source array, and
the second red solid-state light source array is disposed in a position confronting a middle point between the first green solid-state light source array and the second green solid-state light source array.
8. The light source device according to claim 7 , wherein the light combiner comprises:
a half mirror which the blue light from the blue solid-state light source array enters;
a mirror reflecting blue light passing through the half mirror;
a first dichroic mirror reflecting the red light from the second red solid-state light source array, and transmitting blue light from the half mirror;
a second dichroic mirror reflecting the green light from the second green solid-state light source array, and transmitting the blue light and the red light from the first dichroic mirror;
a third dichroic mirror reflecting the red light from the first red solid-state light source array and transmitting the blue light from the mirror; and
a fourth dichroic mirror reflecting the green light from the first green solid-state light source array, and transmitting the blue light and the red light from the third dichroic mirror.
9. The light source device according to claim 1 , wherein the light combiner comprises:
a half mirror which the blue light from the blue solid-state light source array enters;
a mirror reflecting blue light passing through the half mirror;
a first dichroic mirror reflecting the green light from the first and second green solid-state light source arrays, transmitting blue light from the half mirror and the blue light from the mirror, and transmitting the red light from the second red solid-state light source array; and
a second dichroic mirror reflecting the red light from the first and second red solid-state light source arrays, transmitting the blue light from the half mirror and the blue light from the mirror, and transmitting the green light from the second green solid-state light source array,
wherein the first dichroic mirror and the second dichroic mirror are cross-arranged to form a cross-dichroic mirror.
10. The light source device according to claim 7 , wherein the light combiner comprises:
a first mirror reflecting the blue light from the blue solid-state light source array;
a second mirror reflecting the red light from the first red solid-state light source array;
a first dichroic mirror reflecting the green light from the first green solid-state light source array, and transmitting the blue light reflected by the first mirror;
a first polarization beam splitter transmitting the green light from the second green solid-state light source array, and reflecting the blue light and the green light from the first dichroic mirror;
a second polarization beam splitter reflecting the red light from the second red solid-state light source array, and transmitting the red light reflected by the second mirror; and
a second dichroic mirror reflecting the blue light and the green light from the first polarization beam splitter, and transmitting the red light from the second polarization beam splitter.
11. A projection display apparatus comprising:
a light source device according to claim 1 ;
an image light generating part modulating light obtained by the light source device based on an image signal to generate image light; and
a projection optical system magnifying and projecting the image light generated by the image light generating part.