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US 8,998,427 B2Granted
Three dimensional image projector
AssigneeInternational Business Machines Corporation
InventorCasimer M. DeCusatis
Life of this patent
Estimating the term…
Abstract
A method of projecting an image is provided. The method includes the step of providing a first light source, the first light source emitting light at a first polarization. A second light source is provided adjacent the first light source, the second light source emitting light at a second polarization. A digital mirror device is provided (DMD), the DMD having a first axis. A mirror is provided optically disposed between the first light source, the second light source and the DMD, the mirror being adjacent the DMD. A first light is emitted from the first light source. The first light is reflected with the mirror onto the DMD. A second light is emitted from the second light source after the first light is emitted. The second light is reflected with the mirror onto the DMD.
Claims20
A method comprising:
- providing a first light source, the first light source emitting light at a first polarization;
- providing a second light source adjacent the first light source, the second light source emitting light at a second polarization;
- providing a digital mirror device (DMD), the DMD having a first axis;
- providing a mirror optically disposed between the first light source, the second light source and the DMD, the mirror being adjacent the DMD;
- emitting a first light from the first light source;
- reflecting the first light with the mirror onto the DMD having a first image thereon;
- emitting a second light from the second light source after the first light is emitted;
- reflecting the second light with the mirror onto the DMD having a second image thereon, the second image being offset from the first image;
- and
- forming a three dimensional image from the first light and second light reflected from the DMD.
7 more elements
A method comprising:
- providing a first light source, the first light source emitting light at a first polarization;
- providing a second light source adjacent the first light source, the second light source emitting light at a second polarization;
- providing a digital mirror device (DMD), the DMD having a first axis;
- providing a mirror optically disposed between the first light source, the second light source and the DMD the mirror being adjacent the DMD;
- emitting a first light from the first light source;
- reflecting the first light with the mirror onto the DMD;
- emitting a second light from the second light source after the first light is emitted;
- and,
- reflecting the second light with the mirror onto the DMD;
- providing a projection lens adjacent the DMD, the projection lens having a second axis, wherein the second axis is offset from the first axis;
- emitting the first light reflected from the DMD through the projection lens;
- emitting the second light reflected from the DMD through the projection lens;
- transmitting a first modulation signal to the first light source and the second light source;
- transmitting a second modulation signal to the DMD;
- and,
- wherein the first modulation signal is two times a frequency of the second modulation signal.
13 more elements
A method comprising:
- providing a first light source, the first light source emitting light at a first polarization;
- providing a second light source adjacent the first light source, the second light source emitting light at a second polarization;
- providing a digital mirror device (DMD), the DMD having a first axis;
- providing a mirror optically disposed between the first light source, the second light source and the DMD, the mirror being adjacent the DMD;
- emitting a first light from the first light source;
- reflecting the first light with the mirror onto the DMD;
- emitting a second light from the second light source after the first light is emitted;
- and,
- reflecting the second light with the mirror onto the DMD;
- the first light source includes a first green laser diode, a first blue laser diode and a first red laser diode;
- and,
- the second light source includes a second green laser diode a second blue laser diode and a second red laser diode;
- providing a first collimating lens optically coupled to the first green laser diode and the second green laser diode;
- providing a second collimating lens optically coupled to the first blue laser diode and the second blue laser diode;
- and,
- providing a third collimating lens optically coupled to the first red laser diode and the second red laser diode.
13 more elements
A method comprising:
- providing a first light source, the first light source emitting light at a first polarization;
- providing a second light source adjacent the first light source, the second light source emitting light at a second polarization;
- providing a digital mirror device (DMD), the DMD having a first axis;
- providing a mirror optically disposed between the first light source, the second light source and the DMD, the mirror being adjacent the DMD;
- emitting a first light from the first light source;
- reflecting the first light with the mirror onto the DMD;
- emitting a second light from the second light source after the first light is emitted;
- and,
- reflecting the second light with the mirror onto the DMD;
- wherein the first light source, the second light source and the DMD are arranged within a space about 5-10.5 mm in height, about 20-37 mm in width and about 20-37 mm in length.
7 more elements
Dependencies are inferred from the claim text.