Display apparatus with multi screens

A display apparatus with multi screens, comprising:

• a plurality of display screens, arranged adjacent to each other, wherein at least one of the two adjacent display screens of the display screens have an included angle greater than 90 degrees and less than 180 degrees, and each of the display screens has a display area and a frame surrounding the display area;
• at least one prism structure optical element, disposed between the two adjacent display screens having an included angle respectively, and covering two side edges adjacent to each other in the frames and portions of the display areas of the two adjacent display screens respectively, wherein each of the at least one prism structure optical element comprises a base and a plurality of prism pillars arranged on the base in a predetermined direction and facing the two adjacent display screens, and each of the plurality of prism pillars extend in a direction substantially parallel to the two side edges adjacent to each other, the base includes a first region and a second region adjacent to the first region, respectively corresponding to portions of the two adjacent display screens, the first region has a length La in the predetermined direction, the second region has a length Lb in the predetermined direction, and La≥Lb, the prism pillars comprise a plurality of first prism pillars arranged in the first region and a plurality of second prism pillars arranged in the second region, each of the first prism pillars has a first total reflecting surface and a first refracting surface, and the first total reflecting surface is located between the first refracting surface and the second region, each of the second prism pillars has a second total reflecting surface and a second refracting surface, and the second total reflecting surface is located between the second refracting surface and the first region.