A display interface (interface device) of a mobile telecommunication terminal is provided. The mobile telecommunication terminal includes a main body having a processor, and a display coupled to the main body. The processor is configured to implement mobile telecommunication terminal functions. The interface device includes a digital-to-analog converter configured to convert digital pixel information to an analog color signal. The interface device also includes graphic signal lines operatively connected to the digital-to-analog converter, configured to carry the analog color signal to the display. The interfere device also includes a clock line operatively connected to the digital-to-analog converter, configured to provide a timing reference used to sample the analog color signal. The interface device also includes a data enable line operatively connected to the digital-to-analog converter, configured to control transmission of the analog color signal through the graphic signal lines based on a selective switching operation.