Patent ID: 7324122

Claim:
A display system for image overlapping, comprising: a detection module to receive a first image, and detect synchronous signals therein; a transmission interface coupled to the detection module to receive a second image having position display information; a control module coupled to the detection module and the transmission interface to receive the synchronous signals and the second image, generate a switch control instruction, and transmit the switch control instruction for outputting the second image when the position display information of the second image conforms to a display status of the first image according to the synchronous signals of the first image; and a switch output device coupled to the control module to receive the first image and the second image, and select both the first image and the second image from the control module for outputting the first and second images according to the switch control instruction such that the second image overlaps the first image; wherein the detection module further determines resolution information of the first image according to the synchronous signals, and transmits the resolution information via the transmission interface.