Patent ID: 7830332

Claim:
A display driving unit comprising: a first display driving circuit for driving a first display having a first resolution, and configured: to receive a first display signal having a serial data format and a second display signal through a first interface, the first interface being a serial differential interface; to drive a first display panel with the first display signal; to convert the second display signal having a serial data format into a signal having a parallel data format conforming to a second interface, the second interface being a parallel interface; and to output the converted second display signal through the second interface to a second display driving circuit for driving a second display panel having a second resolution not equal to the first resolution, wherein the first interface is a packet interface, and the first and the second display signals are inputted as encoded packet data to the first display driving circuit from an external source, wherein the first display driving circuit includes: a first interface unit configured to receive the first display signal and the second display signal through the first interface; a signal discriminating circuit configured to discriminate the received first display signal from the received second display signal; a signal demultiplexing circuit configured to output a selected one of the first display signal and the second display signal based on a discriminating result of the signal discriminating circuit; a driver logic circuit configured to drive the first display panel with the first display signal; and a second interface unit configured to convert the second display signal outputted from the signal demultiplexing circuit into a signal conforming to the second interface and to output the conformed second display signal conforming to the second interface, and wherein the signal discriminating circuit generates a panel select signal for selecting one of the first display panel and the second display panel based on at least one of the first and the second display signals.