Abstract: A display system is arranged such that an image data providing apparatus calculates a brightness level of original image data (by brightness level calculating section), generates brightness-adjusted image data by increasing brightness of the original image data based on the brightness level (by brightness adjusting section), and transmits the brightness-adjusted image data to a display apparatus (by image transmitting section). The display apparatus receives the brightness-adjusted image data from the image data providing apparatus (by image receiving section), and controls a backlight such that the backlight reduces its luminance according to how much the brightness of the brightness-adjusted image data is increased from that of the original image data (by backlight adjusting section). With this arrangement, it is possible to allow the image data providing apparatus to generate the brightness-adjusted image data whose brightness is increased in order to reduce the luminance of the backlight.

Abstract: A print control method capable of reducing power consumption of an information apparatus is performed between the information apparatus for transmitting print data and a printer receiving the print data for image forming in accordance with the print data which are connected by wireless communication. The print control method includes the steps of: calculating a first period of time it takes before it becomes ready to receive the print data by the printer; notifying the information apparatus of the first period of time by the printer; determining if the first period of time is elapsed by the information apparatus; and transmitting the print data to the printer by the information apparatus when the first period of time is elapsed. It is noted that a printing system using the print control method is also claimed.