Method for selecting from plurality of input signals to determine output signal for external device and display for performing the method

A method for selecting from a plurality of input signals to determine an output signal for an external device, the method comprising a plurality of steps performed by a display, wherein the plurality of steps include:

• a first step including:
• receiving the plurality of input signals by a plurality of input ports of the display respectively, and automatically selecting a first input signal from the plurality of input signals as a selected signal to be or to be converted into the output signal under a default rule;
• a second step including:
• determining whether the display is displaying frame(s) according to the selected signal;
• and
• a third step including:
• responsive to determining that the display is displaying the frame(s) according to the selected signal, executing at least one output step including:
• in a circumstance that a bandwidth of an output port of the display is enough, executing subsidiary output steps including:
• setting a signal outputting circuit of the display according to a format of the selected signal and a specification of the output port, wherein the output port is configured to be physically coupled to the external device;
• and
• after the signal outputting circuit is set, using the signal outputting circuit to output the output signal to the output port according to the selected signal;
• detecting whether the plurality of input signals is updated because the first input signal has been removed or a new input signal, as a part of the plurality of input signals, is received by the display, and accordingly generating a change-detection result;
• when the change-detection result indicates that the plurality of input signals is not updated, making the signal outputting circuit keep outputting the output signal to the output port according to the selected signal;
• and
• when the change-detection result indicates that the plurality of input signals is updated, going back to the first step.

A display for selecting from N input signals to determine an output signal for an external device, the display comprising:

• N input ports configured to receive the N input signals respectively, wherein the N is an integer equal to or greater than two;
• at least one output port including a first output port, wherein the first output port is configured to be physically coupled to the external device;
• K N-to-1 multiplexers coupled to the N input ports and configured to select X input signal(s) from the N input signals, wherein the K is an integer equal to or greater than two, and the X is a positive integer equal to or less than the N;
• K signal processing circuits coupled to the K N-to-1 multiplexers respectively and configured to process the X input signal(s) to generate X signal(s), wherein the X signal(s) include(s) (X−1) locally-applied signal(s) and a selected signal that is used as the output signal or a material for generating the output signal;
• (M+1) K-to-1 multiplexers coupled to the K signal processing circuits, the (M+1) K-to-1 multiplexers configured to output the (X−1) locally-applied signal(s) to (X−1) signal displaying circuit(s) of M signal displaying circuit(s) of the display and output the selected signal to a signal outputting circuit of the display, wherein the M is a positive integer;
• the M signal displaying circuit(s) including the (X−1) signal displaying circuit(s), wherein the (X−1) signal displaying circuit(s) is/are configured to show frame(s) on a screen of the display according to the (X−1) locally-applied signal(s);
• the signal outputting circuit configured to output the output signal to the first output port according to the selected signal;
• and
• a control circuit configured to control the K N-to-1 multiplexers and the (M+1) K-to-1 multiplexers according to a user command or a default rule and thereby select one of the N input signals as the selected signal.