Patent ID: 7295264

Claim:
A display apparatus for selectively displaying a two-dimensional image and a three-dimensional image, the display apparatus comprising: a flat panel display device which generates a two-dimensional image when two-dimensional image display is requested and generates a plurality of viewpoint images having parallax when three-dimensional image display is requested; and a switching panel which is disposed in front of the flat panel display device to be separated from the flat panel display device by a predetermined distance and is controlled according to a type of image generated by the flat panel display device so that the two-dimensional image and the three-dimensional image can be displayed, wherein at least one of following formulae is satisfied: p i = p ⁡ ( 1 - d V D ) ⁢ ⁢ and Ep i = V W · d V D , where “p” denotes a pixel pitch of the flat panel display device, p i denotes a pixel pitch of the switching panel, V D denotes a watching distance, “d” denotes a distance between the flat panel display device and the switching panel, Ep i denotes a width of the valid image display region transmitting light on the switching panel during three-dimensional image display, and V w denotes a width of a visual field.