Projector and projector system
This projector includes a laser beam generation portion outputting a laser beam, an image projection portion, including a scanning portion scanning the laser beam, projecting an image on a projection area, an image correction portion correcting distortion of the projected image on the basis of projection condition information, a photoreceiving portion receiving the laser beam reflected by a detection object, and a position acquisition portion acquiring the position of the detection object on the basis of photoreceiving information of the laser beam received by the photoreceiving portion and the projection condition information employed by the image correction portion for correcting the image.
1. A projector comprising:
a laser beam generation portion outputting a laser beam;
an image projection portion, including a scanning portion scanning said laser beam, projecting an image on a projection area;
an image correction portion correcting distortion of projected said image on the basis of projection condition information;
a photoreceiving portion receiving said laser beam reflected by a detection object; and
a position acquisition portion acquiring the position of said detection object on the basis of photoreceiving information of said laser beam received by said photoreceiving portion and said projection condition information employed by said image correction portion for correcting said image; and
wherein said image correction portion is configured to estimate a scanning locus of said laser beam on said projection area on the basis of said projection condition information and to correct said distortion of said projected image on the basis of estimated said scanning locus; and
wherein said position acquisition portion is configured to estimate a scanning locus of said laser beam on said projection area on the basis of said projection condition information and to acquire the position of said detection object on the basis of estimated said scanning locus and said photoreceiving information.
2. The projector according to claim 1 , wherein said image correction portion is formed to estimate said scanning locus of said laser beam on said projection area on the basis of image correction information including said projection condition information and to correct said distortion of said projected image on the basis of estimated said scanning locus, and said position acquisition portion is formed to estimate said scanning locus of said laser beam on said projection area on the basis of position acquisition information including said projection condition information and to acquire the position of said detection object on the basis of estimated said scanning locus and said photoreceiving information.
3. The projector according to claim 2 , so formed as to update said image correction information and said position acquisition information in synchronization with a cycle of natural number times a picture display frame cycle.
4. The projector according to claim 2 , so formed as to update said image correction information and said position acquisition information in a blanking period.
5. The projector according to claim 2 , so formed as to update said image correction information and said position acquisition information in synchronization with each other.
6. The projector according to claim 2 , wherein
said projection condition information includes at least one of a projection angle, a driving frequency for said scanning portion, a scanning angle of said scanning portion, resolution of said image and an aspect ratio of said image.
7. The projector according to claim 2 , wherein
said position acquisition portion is formed not to acquire the position of said detection object until a prescribed time elapses after the updating when said position acquisition information is updated.
8. The projector according to claim 2 , wherein said position acquisition portion is formed to estimate said scanning locus of said laser beam on said projection area on the basis of a relational expression between time information and image coordinate transformation information derived by employing said position acquisition information and to acquire the position of said detection object corresponding to corrected said image projected in a state where said distortion of said image has been corrected on the basis of estimated said scanning locus and said photoreceiving information.
9. The projector according to claim 8 , wherein said image correction portion is formed to estimate said scanning locus of said laser beam on said projection area on the basis of a relational expression between time information and image coordinate transformation information derived by employing said image correction information identical to said position acquisition information and to correct said distortion of said projected image on the basis of estimated said scanning locus.
10. The projector according to claim 8 , wherein said image correction portion is formed to estimate said scanning locus of said laser beam on said projection area on the basis of the same relational expression as said relational expression between said time information and said image coordinate transformation information employed by said position acquisition portion for estimating said scanning locus of said laser beam on said projection area and to correct said distortion of said projected image on the basis of estimated said scanning locus.
11. The projector according to claim 2 , wherein
said position acquisition portion is formed to estimate said scanning locus every line for scanning said laser beam.
12. The projector according to claim 2 , wherein
said position acquisition portion is formed to estimate said scanning locus every frame.
13. The projector according to claim 8 , wherein
said position acquisition portion is formed to estimate said scanning locus by approximating said relational expression between said time information and said image coordinate transformation information.
14. The projector according to claim 8 , wherein
said position acquisition portion is formed to derive said relational expression between said time information and said image coordinate transformation information in consideration of a delay time in circuit processing.
15. The projector according to claim 1 , wherein
said position acquisition portion is constituted of a control portion.
16. A projector system comprising:
a laser beam generation portion outputting a laser beam;
an image projection portion, including a scanning portion scanning said laser beam, projecting an image on a projection area;
an image correction portion correcting distortion of projected said image on the basis of projection condition information;
a photoreceiving portion receiving said laser beam reflected by a detection object; and
a position acquisition portion acquiring the position of said detection object on the basis of photoreceiving information of said laser beam received by said photoreceiving portion and said projection condition information employed by said image correction portion for correcting said image; and
wherein said image correction portion is configured to estimate a scanning locus of said laser beam on said projection area on the basis of said projection condition information and to correct said distortion of said projected image on the basis of estimated said scanning locus, and
wherein said position acquisition portion is configured to estimate a scanning locus of said laser beam on said projection area on the basis of said projection condition information and to acquire the position of said detection object on the basis of estimated said scanning locus and said photoreceiving information.
17. The projector system according to claim 16 , wherein said image correction portion is formed to estimate said scanning locus of said laser beam on said projection area on the basis of image correction information including said projection condition information and to correct said distortion of said projected image on the basis of estimated said scanning locus, and said position acquisition portion is formed to estimate said scanning locus of said laser beam on said projection area on the basis of position acquisition information including said projection condition information and to acquire the position of said detection object on the basis of estimated said scanning locus and said photoreceiving information.
18. The projector system according to claim 17 , so formed as to update said image correction information and said position acquisition information in synchronization with a cycle of natural number times a picture display frame cycle.
19. The projector system according to claim 17 , so formed as to update said image correction information and said position acquisition information in a blanking period.
20. The projector system according to claim 17 , so formed as to update said image correction information and said position acquisition information in synchronization with each other.