Patent ID: 8715074

Claim:
A game system comprising a game apparatus and a portable display device, wherein, the game apparatus includes: an image generator configured to sequentially generate first game images and second game images on the basis of a game process; an image output configured to sequentially output the first game images to a predetermined display device different from the portable display device; an image compressor configured to sequentially compress the second game images to sequentially generate compressed image data; and an image transmitter configured to sequentially transmit the compressed image data to the portable display device in a wireless manner, the portable display device includes: an image pickup device; an image receiver configured to sequentially receive the compressed image data from the game apparatus; an image decompressor configured to sequentially decompress the compressed image data to acquire the second game images; a display configured to sequentially display the second game images acquired through the decompression by the image decompressor; and an imaging data transmitter configured to transmit compressed imaging data to the game apparatus, the compressed imaging data being obtained by compressing a pickup image acquired by the image pickup device, and the game apparatus further includes: an imaging data receiver configured to receive and decompress the compressed imaging data to acquire the pickup image; an image determination device configured to determine whether or not the pickup image acquired through the decompression by the imaging data receiver includes a predetermined first game image; an image delay calculator configured to, when the pickup image is determined to include the predetermined first game image, calculate an image delay time between the image output outputting the predetermined first game image and the predetermined display device displaying the predetermined first game image, on the basis of the time of the determination, the time of the output of the predetermined first game image by the image output, and a processing time between the acquisition of the pickup image by the image pickup device and the determination; and an image transmission controller configured to delay the timing of transmitting the second game images to the portable display device, on the basis of the image delay time.