1. An imaging apparatus, comprising:
a printing mechanism having a media path;
a print media source for supplying a sheet of print media to said printing mechanism;
a drive unit;
a drive shaft coupled to said drive unit; and
a media sensor device mounted to said drive shaft, wherein as said drive shaft is rotated in a first direction said media sensor device is moved from a first position that is out of the media path to a second position that is in said media path for sensing said sheet of print media, and as said drive shaft is rotated in a second direction opposite to said first direction said media sensor device is moved from said second position that is in said media path for sensing said sheet of print media to said first position that is out of the media path.
2. The imaging apparatus of claim 1, wherein said media sensor device pivots around an axis of said drive shaft.
3. The imaging apparatus of claim 1, wherein said media sensor device comprises:
an arm having an opening for receiving said drive shaft;
a friction device for providing a frictional coupling of said arm to said drive shaft; and
a sensor attached to said arm.
4. The imaging apparatus of claim 3, wherein said friction device is a friction-slip clutch configured to produce an axial load along an axis of said drive shaft to generate friction between said arm and said drive shaft.
5. The imaging apparatus of claim 3, wherein said friction device comprises:
a bushing interposed between said arm and said drive shaft, said bushing being mounted to said drive shaft for rotation therewith; and
a spring interposed between said bushing and said arm.
6. The imaging apparatus of claim 5, wherein said bushing has a non-circular opening for receiving said drive shaft, and drive shaft has a profile in cross-section corresponding to said non-circular opening.
7. The imaging apparatus of claim 6, wherein said non-circular opening is a D-shaped opening.
8. The imaging apparatus of claim 5, wherein said spring is a coil spring that is positioned around said drive shaft.
9. The imaging apparatus of claim 8, wherein said bushing includes a retainer, said spring being interposed between said retainer and said arm.
10. The imaging apparatus of claim 9, wherein said retainer is a shoulder that extends radially from a body of said bushing.
11. The imaging apparatus of claim 10, wherein said shoulder is a snap ring that engages said body of said bushing.
12. The imaging apparatus of claim 1, said media sensor device comprising:
an arm having a proximal end and a distal end, said arm being pivotably mounted to said drive shaft;
a sheet picking roller mounted to said arm near said distal end of said arm, said sheet picking roller being driven by said drive shaft; and
a media sensor mounted to said arm.
13. An imaging apparatus, comprising:
a printing mechanism having a media path;
a print media source for supplying a sheet of print media to said printing mechanism;
a drive system; and
a media sensor device mounted to said drive system, said drive system effecting a movement of said media sensor device toward a surface of said sheet of print media from a first position that is out of the media path to a second position that is in said media path for sensing said sheet of print media, and said drive system effecting a movement of said media sensor device away from said surface of said sheet of print media from said second position that is in said media path for sensing said sheet of print media to said first position that is out of the media path.
14. The imaging apparatus of claim 13, wherein said drive system comprises:
a drive unit; and
a drive shaft coupled to said drive unit.
15. The imaging apparatus of claim 14, wherein said media sensor device is mounted to said drive shaft.
16. The imaging apparatus of claim 15, wherein as said drive shaft is rotated in a first direction said media sensor device is moved from said first position that is out of the media path to said second position that is in said media path for sensing said sheet of print media, and as said drive shaft is rotated in a second direction opposite to said first direction said media sensor device is moved from said second position that is in said media path for sensing said sheet of print media to said first position that is out of the media path.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A display device, comprising an image projection unit configured to project a light flux toward one eye of a human viewer by using a projection plate to reflect the light flux, the light flux including an image including a display object having a vanishing point, the projection plate being reflective and transmissive,
the image projection unit being configured to dispose the vanishing point of the display object at a position different from a position of a vanishing point of a background image viewed by the human viewer through the projection plate.
2. The device according to claim 1, wherein the image projection unit disposes the display object at a position lower than a position of a center of a reflective surface of the projection plate as viewed by the human viewer and disposes the vanishing point of the display object at a position higher than a position of the vanishing point of the background image as viewed by the human viewer.
3. The device according to claim 1, wherein the image projection unit disposes the display object at a position higher than a position of a center of a reflective surface of the projection plate as viewed by the human viewer and disposes the vanishing point of the display object at a position lower than a position of the vanishing point of the background image as viewed by the human viewer.
4. The device according to claim 2, wherein the image projection unit includes a first lens, a second lens, and a divergence angle control element provided between the first lens and the second, lens, the divergence angle control element being configured to control a divergence angle of the light flux.
5. The device according to claim 4, wherein the divergence angle control element is an aperture having an opening having a variable size.
6. The device according to claim 4, wherein
the first lens has a first focal distance;
the second lens has a second focal distance;
a distance between the divergence angle control element and the first lens is the first focal distance; and
a distance between the divergence angle control element and the second lens is the second focal distance.
7. The device according to claim 2, wherein
the display object has a configuration including a first side and a second side; and
an extension line of the first side intersects an extension line of the second side at the vanishing point of the display object.
8. The device according to claim 2, wherein a projection area of the light flux at a position of the human viewer has a lateral-direction width not more than 70 millimeters as viewed by the human viewer.
9. The device according to claim 2, wherein the image projection unit changes a difference between the vanishing point of the display object and the vanishing point of the background image based on a target position of the display object.
10. The device according to claim 9, wherein
the image projection unit causes the position of the vanishing point of the display object to match the position of the vanishing point of the background image when a depthward set distance between the target position and a position of the one eye is not more than 30 meters, and
the image projection unit causes the position of the vanishing point of the display object to be different from the position of the vanishing point of the background image when the depthward set distance is greater than 30 meters.
11. The device according to claim 10, wherein the image projection unit causes the position of the vanishing point of the display object to be different from the position of the vanishing point of the background image when the depthward set distance is not less than 45 meters.
12. The device according to claim 1, wherein
the display device is mounted in a vehicle; and
the projection plate is a windshield unit of the vehicle.
13. A display method, comprising:
projecting a light flux including an image including a display object toward one eye of a human viewer by using a projection plate to reflect the light flux, the projection plate being reflective and transmissive; and
disposing a vanishing point of the display object at a position different from a position of a vanishing point of a background image viewed by the human viewer through the projection plate during the projecting toward the one eye.
14. The method according to claim 13, further comprising:
disposing the display object at a position lower than a position of a center of a reflective surface of the projection plate as viewed by the human viewer; and
disposing the vanishing point of the display object at a position higher than a position of the vanishing point of the background image as viewed by the human viewer.
15. The method according to claim 13, further comprising:
disposing the display object at a position higher than a position of a center of a reflective surface of the reflection plate as viewed by the human viewer; and
disposing the vanishing point of the display object at a position lower than a position of the vanishing point of the background image as viewed by the human viewer.
16. The method according to claim 13, wherein the projecting toward the one eye includes projecting the light flux toward the one eye by using the projection plate to reflect the light flux by using a first lens, a second lens, and a divergence angle control element provided between the first lens and the second lens, the divergence angle control element being configured to control a divergence angle of the light flux.
17. The method according to claim 16, further comprising:
changing a difference between the vanishing point of the display object and the vanishing point of the background image based on a target position of the display object.
18. The method according to claim 17, wherein
the image projection unit causes the position of the vanishing point of the display object to match the position of the vanishing point of the background image when a depthward set distance between the target position and a position of the one eye is not more than 30 meters; and
the image projection unit causes the position of the vanishing point of the display object to be different from the position of the vanishing point of the background image when the depthward set distance is greater than 30 meters.
19. The method according to claim 18, wherein the image projection unit causes the position of the vanishing point of the display object to be different from the position of the vanishing point of the background image when the depthward set distance is not less than 45 meters.
20. The method according to claim 13, wherein
the projection plate is a windshield unit of the vehicle.