Abstract: The present invention provides a television apparatus that can reproduce and show a program when the program is stopped without a user performing troublesome operations even when the user is occupied with a sudden phone call or an unexpected visitor while he/she is watching television. A volume comparator starts recording of the program, which is currently being watched, by using a recording apparatus when a set volume value is lower than a threshold value or is set to a sound cancelling mode. Also, when a newly set volume value is higher than the threshold value or the sound cancelling is released, the volume comparator stops the display of the program that is currently being watched and starts reproducing display of the recorded program by returning to the recording start time point.

Abstract: There is provided a management server technology that allows a user to continuously use a business function of a business server without logging in again to the business server, even if the authority of the user to the business server is changed. The business server receives an access from a user terminal, and requests a management server to perform user authentication. In response to the authentication request, the management server determines a future scheduled authority of the user, generates not only authority information at the time of the user authentication, but also a determination result including the future scheduled authority information, and transmits them to the business server. The business server provides the user terminal with a new business function based on the scheduled user authority information, upon expiration of a validity period of the user authority to the current business function.

Abstract: The present invention provides a television apparatus that can reproduce and show a program when the program is stopped without a user performing troublesome operations even when the user is occupied with a sudden phone call or an unexpected visitor while he/she is watching television. A volume comparator starts recording of the program, which is currently being watched, by using a recording apparatus when a set volume value is lower than a threshold value or is set to a sound cancelling mode. Also, when a newly set volume value is higher than the threshold value or the sound cancelling is released, the volume comparator stops the display of the program that is currently being watched and starts reproducing display of the recorded program by returning to the recording start time point.

Abstract: A plurality of photo detectors are arranged outside the display screen of a projection display apparatus having a built-in digital convergence correction system and a function for adjusting data in the frame memory so as to coincide the photoelectric devices of the photo detectors with the adjustment patterns is provided. The adjusted data when the convergence on the entire screen of the display is adjusted and the adjusted data when the convergence is adjusted by the adjustment function before misconvergence is generated are memorized beforehand. When misconvergence is generated, the convergence is adjusted by the adjustment function again, and a corresponding correction value is obtained on the photo detector by calculating the adjusted data at this time and the prememorized adjusted data, and a correction value on the entire screen is obtained by executing an interpolation calculation from this correction value, and the misconvergence on the entire screen is corrected.