Patent ID: 8605137

Claim:
A stereoscopic image display, comprising: an image displaying unit comprising a black matrix and a plurality of pixels surround by the black matrix, wherein the pixels are arranged in an array; and an optical grating disposed corresponding to the image displaying unit, wherein the optical grating comprises a plurality of constitutional groups repeating arranged along a first direction, each of constitutional groups comprises at least one slit having the same width, and the first direction is one of the arranging direction of the pixels wherein each of constitutional groups comprises a plurality of slits, two adjacent slits in same constitutional group has a shielding interval, each pixel has a width P in the first direction, each slit has a width W in the first direction, the width P of pixel is not equal to the width W of slit, and shielding intervals between two adjacent slits in same constitutional group are varied along the first direction, and wherein the width P of pixel and the width W of slit satisfy formula (1): W = m n × P , m , n ∈ N , and ⁢ ⁢ ⁢ m ≠ n , ( 1 ) each constitutional group comprises n slits, and a distance D(n) of (n) th slit from the first slit in the same constitutional group satisfies formula (2): D ( n )=( n −1)× H+S ( n ) (2) in formula (2), H represents a hypothetical interval, S(n) represents a shift distance of (n) th slit in one constitutional group, S(n) satisfies formula (3) when n is even, and S(n) satisfies formula (4) when n is odd: S ⁡ ( 1 ) , S ⁡ ( 2 ) , … ⁢ , S ⁡ ( n - 1 ) , S ⁡ ( n ) = ( 0 , + 1 , - 1 , … ⁢ , n - 2 2 , 2 - n 2 , ± n 2 ) × P n ; ( 3 ) S ⁡ ( 1 ) , S ⁡ ( 2 ) , … ⁢ , S ⁢ ( n - 1 ) , S ⁡ ( n ) = ( 0 , + 1 , - 1 , … ⁢ , n - 3 2 , 3 - n 2 , n - 1 2 , 1 - n 2 ) × P n , ( 4 ) in formula (3) and formula (4), symbols + and − represent right shift and left shift, respectively.