PROJECTION DEVICE

摘要

A projection device comprising, a red light source, a green light source, and a blue light source which can emit red, green and blue light respectively, a beam combiner which is configured such that it can combine light beams; a means for collimating the light emitted from the red, green and blue light sources to provide red, green and blue collimated light beams, an optical modifier means, which is arranged such that the optical modifier means can receive the red, green and blue collimated light beams, and wherein the optical modifier means is configured to modify cross sectional dimensions of the red, green and blue collimated light beams to provide red, green and blue projection beams each of which has a circular cross section, and wherein the optical modifier means is configured, and the distances between the light sources and means for collimating are set, such that the dimensions of the circular cross sections of the red, green and blue projection beams are equal at a predetermined distance from the projection device such that the spot sizes of each of the red, green and blue projection beams are equal or have predefined sport sizes at the predetermined distance from the projection device; MEMS mirror which is configured such that it can oscillate about at least one oscillation axis to scan the red, green and blue projection beams across a projection screen which is positioned at the predetermined distance from the projection device.

主权项

1. a green light source, and a blue light source which can emit red, green and blue light respectively,
a beam combiner which is configured such that it can combine light beams; a means for collimating the light emitted from the red, green and blue light sources to provide red, green and blue collimated light beams, an optical modifier means, which is arranged such that the optical modifier means can receive the red, green and blue collimated light beams, and wherein the optical modifier means is configured to modify cross sectional dimensions of the red, green and blue collimated light beams to provide red, green and blue projection beams each of which has a circular cross section, and wherein the optical modifier means is configured, and the distances between the light sources and means for collimating are set, such that the dimensions of the circular cross sections of the red, green and blue projection beams are equal at a predetermined distance from the projection device such that the spot sizes of each of the red, green and blue projection beams are equal or have predefined spot sizes at the predetermined distance from the projection device; a MEMS mirror which is configured such that it can oscillate about at least one oscillation axis to scan the red, green and blue projection beams across a projection screen which is positioned at the predetermined distance from the projection device.