Patent ID: 8390568

Claim:
A display system comprising a display device, a display control device and a laser emitting device, the display device including: a display part that displays information on a display screen; and a laser detection part having a plurality of optical sensors arranged in the vicinity of the display screen of the display part to detect a laser beam that has reached the display screen, the laser emitting device including: an instruction input part that inputs an instruction with respect to the displayed information, and a laser output part that outputs the laser beam including output information corresponding to the inputted instruction; and the display control device including: a position calculation part that calculates a position of the display screen irradiated with the laser beam based on positions of the optical sensors that have detected the laser beam, a received information acquiring part that acquires the output information included in the laser beam detected by the optical sensors, and a display control part that controls a display of the information displayed on the display part, based on the position calculated by the position calculation part and the acquired output information, wherein the instruction input part includes a plurality of keys, and the output information included in the laser beam is instruction information corresponding to a function associated with each key, and when any one of the keys is depressed, the laser output part outputs the laser beam including the instruction information associated with the depressed key; wherein the instruction information included in the laser beam is pen mode switch instruction information for additionally displaying a desired dot image on a display screen, and the display control part displays the dot image at an irradiation position of the laser beam on a display screen of the display part, when the received information acquiring part acquires pen mode switching instruction information from the laser beam including the instruction information; wherein, when the instruction information included in the laser beam is the pen mode release instruction information for deleting an added dot image, the display control part deletes the dot image additionally displayed on the display screen.