Patent ID: 9529386
Filing Date: 2016-12-27
CPC Classification: G06F,G09G

Claim Text:
1. An information processing apparatus comprising: a first connector configured to connect to an external display; a connecting portion configured to detachably connect to an extension unit comprising a second connector, the second connector configured to connect to the external display; a display controller configured to assign an input/output port for receiving a supplied detection signal indicating a connection of the external display; a first logic circuit configured to selectively supply either a detection signal indicating the connection of the external display to the first connector or a detection signal indicating the connection of the external display to the second connector from the extension unit through the connecting portion to the input/output port; a second logic circuit between the input/output port and the first logic circuit and configured to switch between supplying the supplied detection signal output from the first logic circuit to the input/output port and cutting off the supplied detection signal output from the first logic circuit to the input/output port; and a controller configured to control the second logic circuit to cut off the supply of the supplied detection signal output from the first logic circuit to the input/output port for a first period when the extension unit is attached or detached.