Patent ID: 8456529

Claim:
A device for evaluating connectivity between a video driver and a display, the device comprising: a first video driver; a first output connector; a first terminating resistance; a first comparison unit; and a first jamming circuit configured to produce jam video information either provided to the first video driver or outputted by the first video driver; wherein the first video driver has an output port that is coupled to the first output connector, to the first terminating resistance and to the first comparison unit; wherein the first output connector is configured to be coupled via a first cable to a first input of the display; wherein the first comparison unit is configured to perform comparisons between a voltage level on the first terminating resistance to multiple thresholds and to determine whether a display first input impedance is substantially equal to the first terminating resistance, whether the display first input impedance is substantially lower than the first terminating resistance, and whether the first video driver is disconnected from the display; and wherein the first comparison unit performs the comparisons during an overlap between a jam free period and a pixel information idle period; wherein the comparisons are executed during the pixel information idle period.