Patent ID: 9666167
Date: 2017-05-30
CPC Classifications: G06F,G09G

Claim:
1. A method of displaying a screen of a portable device having at least one display unit, the method comprising: detecting generation of a screen-changing event; determining a plurality of layers according to a type of data to be displayed on the screen and whether the portable device is connected to an external image output device, wherein the plurality of layers are determined by classifying the data to be displayed; allocating a corresponding layer property indicating an internal output image frame or an external output image frame, to each of the plurality of layers; generating the internal output image frame and the external output image frame by combining at least a part of the plurality of layers according to the corresponding layer property of each of the plurality of layers; and displaying the internal output image frame on the display unit, and transmitting the external output image frame to the external image output device.