A persona determination approach can be utilized to apply digital personas across multiple communications domains. The reactor charge is continuously recirculated within the reactor loop. Background service request are scheduled following a user service request after a time delay that is controlled as a function of the cumulative data histogram and a calculated length of a busy time of the background service request. The map further has symbols indicating virtual locations. A compensation unit applies compensation processing to compensate for fluctuation of display luminance due to the influence of voltage drop caused by a resistance of the row wiring to the image data, and a luminance control unit controls display luminance of the display panel based upon luminance information of the image data. The crossbar-board has a switching element mounted thereon.