Projection type display apparatus
AssigneeCanon Kabushiki Kaisha
InventorKatsumi Kurematsu
Life of this patent
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Abstract
The invention relates to a projection type display apparatus having an optical modulating device (3) controlling a light reflecting state by using a mirror array device, and a projecting optical system (4) projecting reflected light of light illuminated from the optical modulating device (3). In the apparatus, the mirror array device is illuminated by R, G and B color light components from different directions, and at least a part of the reflected light of the mirror array device is selectively guided to the projecting optical system (4) to project the light on to the screen or the like by controlling a tilt angle of the mirror array device.
Claims18
A projection type display apparatus comprising:
- a mirror array device for performing optical modulation by a plurality of tiltable pixel mirrors;
- an illumination optical system for illuminating said mirror array device with a plurality of color light components of different colors from different directions;
- and
- a projecting optical system for projecting reflected light components from said mirror array device onto a projected surface,
- wherein tilt angles of the pixel mirrors have a plurality of angle ranges that do not overlap each other, one of the plurality of color light components is projected onto the projected surface for each angle range, and gray level display of each color is performed by changing the tilt angle of each pixel mirror.
A projection type display apparatus comprising:
- a mirror array device for performing optical modulation by a plurality of tiltable pixel mirrors;
- and
- a projecting optical system for projecting reflected light components from said mirror array device onto a projected surface,
- wherein tilt angles of the pixel mirrors have a plurality of angle ranges that do not overlap each other, a color of a light component guided to said projecting optical system by each pixel mirror changes for each angle range, and gray level display of each color is performed by changing the tilt angle of each pixel mirror.
Dependencies are inferred from the claim text.