Patent ID: 9135199
Filing Date: 2015-09-15
Classification: G06F,G09G,H04N

Abstract:
1. A system for signal input control, adapted for a High Definition Multimedia Interface (HDMI), the system comprising: a control device providing a process information and a control command; and a video device connected to the control device through the HDMI, wherein the video device comprising: a switch unit receiving the process information through a Display Data Channel (DDC); an Extended Display Identification Data (EDID) ROM; a processor; and a detection circuit detecting the control command of the control device, the detection circuit controlling a connection mode of the switch unit in the video device according to the control command, the connection mode being respectively a normal mode and a specific mode, wherein the normal mode is for transmitting the process information to the EDID ROM through the switch unit, and the specific mode is for transmitting the process information to the processor through the switch unit, wherein the control device comprises: a process unit providing the process information, the process information being transmitted to the switch unit of the video device through the DDC; and a control circuit providing the control command, the control command being a specific voltage, the specific voltage being an adjustable voltage, the switch unit being controlled by the detection circuit to transmit the process information to the EDID ROM or the processor according to a value of the specific voltage.