Projection type display device and light source device
First Claim
1. A projection type display device, comprising:
- a laser light source unit having a light emission region for emitting an elliptical laser light;
a focusing lens unit for focusing the laser light emitted from the laser light source unit;
a lenticular lens for refracting the laser light focused by the focusing lens unit;
a homogenizer having a rectangular incident surface on luminous flux focused by the focusing lens unit;
a spatial light modulation element for modulating the laser light emitted from the homogenizer; and
a projection lens for projecting the laser light modulated by the spatial light modulation element,wherein;
the lenticular lens is rotatable about an axis parallel to an optical axis,the incident surface of the homogenizer has a rectangular shape, andthe laser light source unit is arranged such that a longer axis direction of the light emission region and a longer side direction of the incident surface of the homogenizer are substantially parallel.
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Accused Products
Abstract
Miniaturization is realized and high-output lights are obtained by optimizing the arrangement of a laser light source unit and a homogenizer.
A laser light source unit 1 has a light emission region for emitting an elliptical laser light. A focusing lens unit 2 focuses the laser light emitted from the laser light source unit 1. A rod integrator 4 has a rectangular incident surface on luminous flux focused by the focusing lens unit 2. A spatial light modulation element 7 modulates the laser light emitted from the rod integrator 4. A projection lens 8 projects the laser light modulated by the spatial light modulation element 7. The incident surface of the rod integrator 4 has a rectangular shape, and the laser light source unit 1 is arranged such that a longer axis direction of the light emission region and a longer side direction of the incident surface of the rod integrator are parallel.
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Citations
23 Claims
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1. A projection type display device, comprising:
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a laser light source unit having a light emission region for emitting an elliptical laser light; a focusing lens unit for focusing the laser light emitted from the laser light source unit; a lenticular lens for refracting the laser light focused by the focusing lens unit; a homogenizer having a rectangular incident surface on luminous flux focused by the focusing lens unit; a spatial light modulation element for modulating the laser light emitted from the homogenizer; and a projection lens for projecting the laser light modulated by the spatial light modulation element, wherein; the lenticular lens is rotatable about an axis parallel to an optical axis, the incident surface of the homogenizer has a rectangular shape, and the laser light source unit is arranged such that a longer axis direction of the light emission region and a longer side direction of the incident surface of the homogenizer are substantially parallel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A light source device, comprising:
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a laser light source unit having a light emission region for emitting an elliptical laser light; a focusing lens unit for focusing the laser light emitted from the laser light source unit; a lenticular lens for refracting the laser light focused by the focusing lens unit; and a homogenizer having a rectangular incident surface on luminous flux focused by the focusing lens unit, wherein; the lenticular lens is rotatable about an axis parallel to an optical axis, the incident surface of the homogenizer has a rectangular shape, and the laser light source unit is arranged such that a longer axis direction of the light emission region and a longer side direction of the incident surface of the homogenizer are substantially parallel.
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23. A projection type display device, comprising:
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a plurality of laser light sources; a plurality of focusing lenses provided in a one-to-one correspondence with the plurality of laser light sources for focusing the laser lights emitted from the plurality of laser light sources; a lenticular lens for refracting the laser light focused by the focusing lens; a homogenizer having a rectangular incident surface on luminous fluxes focused by the plurality of focusing lenses; a spatial light modulation element for modulating the laser lights emitted from the homogenizer; and a projection lens for projecting the laser lights modulated by the spatial light modulation element, wherein; the lenticular lens is rotatable about an axis parallel to an optical axis, the plurality of laser light sources include a red laser light source for emitting a red laser light, a blue laser light source for emitting a blue laser light and a green laser light source for emitting a green laser light; the red and blue laser light sources are arranged symmetrically with respect to the optical axis of the homogenizer; the green laser light source is arranged on the optical axis of the homogenizer; the plurality of focusing lenses include a focusing lens for red for focusing a red laser light emitted from the red laser light source on the incident surface of the homogenizer, a focusing lens for blue for focusing a blue laser light emitted from the blue laser light source on the incident surface of the homogenizer and a focusing lens for green for focusing a green laser light emitted from the green laser light before being incident on the homogenizer; and an angle between the optical axis of the homogenizer and the outermost edge of the green laser light at a focal point of the focusing lens for green is equal to an angle between the optical axis of the homogenizer and the red or blue laser light at a focal point of the focusing lens for red or the focusing lens for blue.
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Specification