Patent ID: 8223089

Claim:
A display apparatus comprising: a display device including a first image pixel, a second image pixel, a third image pixel, and a fourth image pixel arrayed in a predetermined direction in order; a first shutter element, arranged to face the display device, to switch between light shielding patterns in accordance with a display mode; a second shutter element, arranged so that the display device is interposed between the first shutter element and the second shutter element itself, to switch between light shielding patterns in accordance with the display mode; a light source arranged so that the first shutter element is interposed between the display device and the light source itself; and a driving circuit to control the light shielding patterns by the first shutter element and the light shielding patterns by the second shutter element so that, in a first display mode, a first user who observes the display device from a direction normal thereto is allowed to visually recognize light from the light source that has passed through the four image pixels individually, and, in a second display mode, that a second user who observes the display device from a direction inclined by a predetermined angle with respect to the normal direction to the display device towards a first direction such as to be along the predetermined direction is allowed to visually recognize only light from the light source that has passed through the first image pixel and the second image pixel individually in the light that has passed through the four image pixels individually.