Light source device, video projector and video projection method
First Claim
Patent Images
1. A light source device comprising:
- a first light source configured to emit a first source light in a first wavelength range;
a source light modulator comprising a first face, a second face through which the first source light enters the source light modulator, a first area, and a second area, wherein the first area is configured to have the first source light having entered through the second face pass therethrough, and to output a transmitted light from the first face, and wherein the second area comprises a phosphor layer and is configured to reflect a reflected light excited by fluorescence excitation in a wavelength different from the first wavelength range by being irradiated by the first source light having entered through the second face, and to output the reflected light from the second face;
a second light source configured to emit a second source light in a second wavelength range that is different from the first wavelength range;
an integrator configured to uniformalize luminescence distribution of light input through a light incidence face thereof; and
a light guiding optical system configured to guide the transmitted light, the reflected light, and the second source light to the light incidence face of the integrator,wherein the light guiding optical system comprises;
a first dichroic mirror disposed between the first light source and the source light modulator, the first dichroic mirror being configured to allow the first source light and the second source light to pass therethrough and to reflect the reflected light; and
a second dichroic mirror configured to reflect the second source light and the reflected light and to allow the transmitted light to pass through.
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Abstract
A light source device includes: a first light source configured to emit a first source light in a first wavelength range; a source light generator configured to generate, from the first light, a color-varying source light having time varying color; a second light source configured to emit a second source light in a second wavelength range that is different from the first wavelength range; and a light source controller configured to control driving timing for turning on and off each of the first light source and the second light source so as to cyclically select one of the color-varying source light and the second source light to be output as an output source light.
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Citations
15 Claims
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1. A light source device comprising:
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a first light source configured to emit a first source light in a first wavelength range; a source light modulator comprising a first face, a second face through which the first source light enters the source light modulator, a first area, and a second area, wherein the first area is configured to have the first source light having entered through the second face pass therethrough, and to output a transmitted light from the first face, and wherein the second area comprises a phosphor layer and is configured to reflect a reflected light excited by fluorescence excitation in a wavelength different from the first wavelength range by being irradiated by the first source light having entered through the second face, and to output the reflected light from the second face; a second light source configured to emit a second source light in a second wavelength range that is different from the first wavelength range; an integrator configured to uniformalize luminescence distribution of light input through a light incidence face thereof; and a light guiding optical system configured to guide the transmitted light, the reflected light, and the second source light to the light incidence face of the integrator, wherein the light guiding optical system comprises; a first dichroic mirror disposed between the first light source and the source light modulator, the first dichroic mirror being configured to allow the first source light and the second source light to pass therethrough and to reflect the reflected light; and a second dichroic mirror configured to reflect the second source light and the reflected light and to allow the transmitted light to pass through. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A light source device comprising:
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a first light source configured to emit a first source light in a first wavelength range; a source light generator configured to generate a source light having time varying color using the first source light; a second light source configured to emit a second source light in a second wavelength range that is different from the first wavelength range; a light source controller configured to control the first light source and the second light source to cyclically select one of the source light having time varying color and the second source light to be output as an output source light, wherein the first light source emits a laser light having a blue wavelength range as the first source light, wherein the source light generator comprises a color wheel having a green fluorescence reflection portion and a diffusion transmission portion which are arranged in a circumferential direction of the color wheel, the green fluorescence reflection portion comprising a phosphor that emits light having a green wavelength range using the laser light as an excitation light, the diffusion transmission portion diffusing and transmitting the laser light, wherein the second light source comprises a light emitting diode configured to emit light having a red wavelength range as the second source light, and wherein the light source device further comprises; a first dichroic mirror configured to (i) transmit the laser light having the blue wavelength range that is emitted by the first light source, (ii) reflect the light having the green wavelength range that is emitted by the phosphor, and (iii) transmit the light having the red wavelength range that is emitted by the second light source; and a second dichroic mirror configured to (i) transmit the laser light that is transmitted through the diffusion transmission portion of the color wheel, (ii) reflect the light having the green wavelength range that is reflected by the first dichroic mirror, and (iii) reflect the light having the red wavelength range that is transmitted through the first dichroic mirror. - View Dependent Claims (12, 13, 14, 15)
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Specification