Patent ID: 8717520

Claim:
A display device configured to provide a first observation region with a first picture and a second observation region with a second picture, comprising: a display panel comprising first pixels collectively providing the first picture, second pixels collectively providing the second picture and a black matrix defining a matrix of the first and second pixels; and a light-shielding plate disposed above the display panel and comprising elongated openings extending in a direction of columns of the matrix, wherein the following relationship is satisfied so that in a third observation region between the first observation region and the second observation region no picture is observable through the openings: K≦Q×D /( D+G ) where D is a distance between a plane of the first and second observation regions and the light-shielding plate, G is a distance between the light-shielding plate and the display panel, K is a width of the elongated openings in the light-shielding plate, and Q is a width of the black matrix.