Abstract: A display apparatus including a display device having a display area and a frame area surrounding the display area, a prism module and a transparent element is provided. The corner regions of the frame are adjacent to the corners of the display area respectively. The prism module includes at least one corner prism set disposed on at least one of the corner regions. The transparent element is disposed between the display device and the prism module, and covers the corner regions. The transparent element includes a light entering surface facing the display device, a light exiting surface, and a plurality of side surfaces connected with the light entering surface and the light exiting surface. At least one of the side surfaces located in the corner regions is an inclined surface. The light entering surface connected to the inclined surface is retracted in a direction toward the display area.

Abstract: An electronic whiteboard system and an electronic whiteboard and operation method thereof are provided. A captured image generated by an image capture device includes at least one of a display surface of a flat panel display and a writing trajectory of a writing instrument. A network transmission module transmits the captured image to a remote device through network. The electronic whiteboard system and an electronic whiteboard and operation method thereof provided by the invention my synchronously display and interact with the remote device, so as to greatly improve convenience of use of the electronic whiteboard system.

Abstract: A display apparatus includes a display device and a prism module. The display device has a display area and a frame area surrounding the display area. The prism module is disposed above the frame area. The prism module includes a plurality of first prism sets and at least one second prism set. The first prism sets are respectively disposed beside a plurality of edges of the display area. The second prism set is disposed beside at least one corner of the display area, and the second prism set is adjacent to the first prism sets. The second prism set includes a plurality of prisms, and the prisms are arranged in a direction away from the corner of the display area. The extending direction of each of the prisms of the second prism set is inclined with respect to the edges of the display area which are adjacent to the corner.