The present invention relates to a display device which belonging to mobile communication device and parts and portable terminal thereof. The display device comprises: a mainbody provided with a screen which displaying the video information; an image convert device disposed in the mainbody to convert the image on the basis of the rotation angle when rotating the mainbody. With the construction, the user enjoys an unchanged image without additional operation, therefor increasing the convenience. Furthermore, the image convert device easily converts the longitudinal image into a transverse image when turning the screen within 90 degree, or converts the transverse image into a longitudinal image. According to the invention, when the mainbody which provided with a screen turning relative to the ground, the image on the screen is turned within a certain angle according to the rotating angle of the mainbody. As a result, the user enjoys an unchanged image without additional operation, therefor increasing the convenience. |