Grating and display device

A grating, comprising a periodical cycle arrangement, wherein a first period of the grating is taken as the minimum cycle period and includes two rows of grating structures which have a same grating pitch and a same grating slit width;

• in the first period, the second row of grating structures are shift to the right by a distance “c” compared with the first row of grating structures, and the calculation method of “c” is:
• c=b, in which “b” refers to a width of a sub-pixel in a display panel corresponding to the grating;
• and the first row of grating structures of the ith period are shift to the right by a distance “d” compared with the first row of grating structures of the first period, and the calculation method of “d” is:
• d=2(i−1)b, in which “i” is an integer and i≧2;
• or in the first period, the second row of grating structures are shift to the left by the distance “c” compared with the first row of grating structures, and the calculation method of “c” is:
• c=b, in which “b” refers to the width of a sub-pixel in a display panel corresponding to the grating;
• and the first row of grating structures of the ith period are shift to the left by the distance “d” compared with the first row of grating structures of the first period, and the calculation method of “d” is:
• d=2(i−1)b, in which “i” is an integer and i≧2.