An apparatus controls a main display and a sub-display. The apparatus includes a section which displays, on the sub-display, clock information indicating of time, a section which acquires changed time information, when the time information has been changed, and a section which changes a present value...http://www.google.de/patents/US7823090?utm_source=gb-gplus-sharePatent US7823090 - Information-processing apparatus and clock information display control method for use in the apparatus
