Video game, position of wireless game controller detected by CCD camera adjacent to display

摘要

An input position detection device for detecting an input position of an input device, and an entertainment system which can detect the position of a subunit and has a display which displays an image generated by execution of a program loaded into the entertainment system. The entertainment system has a portable game terminal 3 held by the operator 7. The portable game terminal 3 is equipped with an infrared input/output unit 8 which sends infrared signals corresponding to the commands of the operator 7 to an infrared input/output device 4 which is connected to a monitor device 6. The infrared input/output device and the CCD camera 5 are disposed adjacent each other and point in the direction of the operator 7 holding the portable game terminal 3. A game machine main unit 2 detects the position of the portable game terminal 3 based on the difference between an input image from the CCD camera 5 taken immediately before the operator 7, sends an infrared signal from the infrared input/output unit 8 of the portable game terminal 3 toward the infrared input/output device 4, and the input image at the time that the infrared signal is sent.