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 blue light;
a second solid-state light source array emitting a second color green light;
a third solid-state light source array emitting a third color red 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; and
a lens transmitting the light flux emitted from the light combiner,
wherein with an optical axis of the light flux emitted from the light combiner lens, 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,
wherein 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 first 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 blue light;
a second solid-state light source array emitting a second color green light;
a third solid-state light source array emitting a third color red 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; and
a lens transmitting the light flux emitted from the light combiner,
wherein with an optical axis of the light flux emitted from the light combiner lens, 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,
wherein 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 first 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 first 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 blue light;
a second solid-state light source array emitting a second color green light;
a third solid-state light source array emitting a third color red 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; and
a lens transmitting the light flux emitted from the light combiner,
wherein with an optical axis of the light flux emitted from the light combiner lens, 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,
wherein 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 the first 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 first 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 first 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 first 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.
12. The light source device according to claim 7 , wherein the light combiner comprises:
a first mirror reflecting the blue light from the first 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.
13. A light source device comprising:
a first solid-state light source array emitting blue light;
a second solid-state light source array emitting green light;
a third solid-state light source array emitting red light;
a light combiner for combing the blue light, the green light, and the red light 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; and
a lens transmitting the light flux emitted from the light combiner,
wherein with an optical axis of the lens, as a boundary,
the third solid-state light source array 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 that is opposite to the first side,
wherein the second solid-state light source array includes first and second green solid-state light source arrays, and
the third solid-state light source array includes first and second red solid-state source arrays, and
the light combiner comprises:
a first mirror reflecting the blue light from the first 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.
14. The light source device according to claim 13 , wherein the first red solid-state light source array and a part of the first solid-state light source array are disposed to confront each other, and the second red solid-state light source array and a part of the first green solid-state light source array are disposed to confront each other.
15. The light source device according to claim 1 , wherein the third solid-state light source array requires a lowest target cooling temperature among the first to third solid-state light source arrays.
16. The light source device according to claim 4 , wherein the third solid-state light source array requires a lowest target cooling temperature among the first to third solid-state light source arrays.
17. The light source device according to claim 7 , wherein the third solid-state light source array requires a lowest target cooling temperature among the first to third solid-state light source arrays.