Back to results
US 8,134,599 B2Granted
Scanning image display apparatus
AssigneeCanon Kabushiki Kaisha
InventorsRyuichi Sakaguchi, Shuichi Kobayashi
Life of this patent
Estimating the term…
Abstract
A scanning image display apparatus includes: a scanning unit rotating a mirror to scan a light flux from a light source; an input unit to input a display condition of an image; and a controller changing a rotation angle of the mirror in the scanning unit in accordance with a signal from the input unit. According to the scanning image display apparatus, the display condition (e.g., size, aspect ratio) of the image can be changed without using trimming.
Claims10
A scanning image display apparatus, comprising:
- a light source;
- a scanning unit rotating a mirror to scan a light flux from the light source;
- an input unit operated by a user to input a display condition of an image;
- a controller changing a rotation angle of the mirror in the scanning unit in accordance with a signal from the input unit;
- a light-amount adjusting unit changing a light amount of the light flux;
- and
- a housing that stores therein the light source, the scanning unit and the light-amount adjusting unit, and that has an exit aperture through which the light flux exiting from the scanning unit to outside passes,
- wherein the controller calculates the illuminance at the exit aperture based on the rotation angle of the mirror and a transmittance of the light-amount adjusting unit, and controls the light-amount adjusting unit so that the illuminance is not changed even when the rotation angle is changed.
5 more elements
A scanning image display apparatus, comprising:
- a light source;
- a scanning unit rotating a mirror to scan a light flux from the light source;
- an input unit operated by a user to input a display condition of an image;
- a controller changing a rotation angle of the mirror in the scanning unit in accordance with a signal from the input unit;
- a light-amount adjusting unit changing a light amount of the light flux;
- and
- a housing that stores therein the light source, the scanning unit and the light-amount adjusting unit, and that includes an exit aperture through which the light flux exiting from the scanning unit to outside passes,
- wherein the controller calculates an illuminance at the exit aperture and controls the light-amount adjusting unit so that the illuminance becomes equal to or lower than a specific value,
- wherein,
- when the rotation angle of the mirror is changed, the controller (a) determines an order for driving the scanning unit and the light-amount adjusting unit based on the illuminance at the exit aperture obtained after the change of the rotation angle, and (b) calculates a transmittance of the light-amount adjusting unit corresponding to the rotation angle after the change thereof,
- when the transmittance is increased, the controller changes the rotation angle of the mirror and then drives the light-amount adjusting unit, and
- when the transmittance is decreased, the controller drives the light-amount adjusting unit and then changes the rotation angle of the mirror.
9 more elements
Dependencies are inferred from the claim text.