A display apparatus, comprising: a display device, having a display area (102, 202, 402, 602, 802) and a frame area (120, 220, 620) surrounding the display area (110, 210, 610); and a prism module (130, 530, 830), disposed above the frame area (120, 220, 620), wherein the prism module (130, 330, 830) comprises: a plurality of first prism sets (132, 532, 832), respectively disposed beside a plurality of edges (e) of the display area (110, 210, 610); and at least one second prism set (134, 534, 834), disposed beside at least one corner of the display area and adjacent to the first prism sets (132, 532, 832), wherein the second prism set (134, 534, 834) comprises a plurality of prisms (134a, 534a, 834a) arranged in a direction away from the corner of the display area (110, 210, 610), and an extending direction of each of the prisms (134a, 534a, 834a) of the second prism set (134, 534, 834) is inclined with respect to the edges (e) of the display area (110, 210, 610) adjacent to the corner, characterized in that an acute angle (θ 1) between the extending direction of the prisms of the second prism set and the edges (e) adjacent to the corner in the display area is greater than or equal to 15 degrees and smaller than or equal to 75 degrees. a display device, having a display area (102, 202, 402, 602, 802) and a frame area (120, 220, 620) surrounding the display area (110, 210, 610); and a prism module (130, 530, 830), disposed above the frame area (120, 220, 620), wherein the prism module (130, 330, 830) comprises: a plurality of first prism sets (132, 532, 832), respectively disposed beside a plurality of edges (e) of the display area (110, 210, 610); and at least one second prism set (134, 534, 834), disposed beside at least one corner of the display area and adjacent to the first prism sets (132, 532, 832), wherein the second prism set (134, 534, 834) comprises a plurality of prisms (134a, 534a, 834a) arranged in a direction away from the corner of the display area (110, 210, 610), and an extending direction of each of the prisms (134a, 534a, 834a) of the second prism set (134, 534, 834) is inclined with respect to the edges (e) of the display area (110, 210, 610) adjacent to the corner, characterized in that an acute angle (θ 1) between the extending direction of the prisms of the second prism set and the edges (e) adjacent to the corner in the display area is greater than or equal to 15 degrees and smaller than or equal to 75 degrees. a plurality of first prism sets (132, 532, 832), respectively disposed beside a plurality of edges (e) of the display area (110, 210, 610); and at least one second prism set (134, 534, 834), disposed beside at least one corner of the display area and adjacent to the first prism sets (132, 532, 832), wherein the second prism set (134, 534, 834) comprises a plurality of prisms (134a, 534a, 834a) arranged in a direction away from the corner of the display area (110, 210, 610), and an extending direction of each of the prisms (134a, 534a, 834a) of the second prism set (134, 534, 834) is inclined with respect to the edges (e) of the display area (110, 210, 610) adjacent to the corner, characterized in that an acute angle (θ 1) between the extending direction of the prisms of the second prism set and the edges (e) adjacent to the corner in the display area is greater than or equal to 15 degrees and smaller than or equal to 75 degrees.