Abstract: The present invention relates to a method of synchronous control for a synchronous control system provided with a master device and at least one slave device connected via a communications network. The master device transmits first time data to the master device and the at least one slave device upon detection of generation of a synchronization signal, the first time data indicating a time at which the synchronization signal is generated. The master device transmits second time data to the at least one slave device upon reception of the first time data, the second time data indicating a time at which the first time data is received.

Abstract: The present invention relates to a method of synchronous control for a synchronous control system provided with a master device and at least one slave device connected via a communications network. The master device transmits first time data to the master device and the at least one slave device upon detection of generation of a synchronization signal, the first time data indicating a time at which the synchronization signal is generated. The master device transmits second time data to the at least one slave device upon reception of the first time data, the second time data indicating a time at which the first time data is received.

Abstract: An automatic primary color component covergence alignment system for a color television display apparatus is presented whereby an alignment pattern is periodically displayed in peripheral regions of the television screen, in each of the primary colors during respective successive correction intervals, the pattern positioned such as to fall upon photo-sensitive devices disposed at the screen periphery. Adjustment of pattern position is executed during each correction interval, based on position data derived from output signals from the photo-sensitive devices, such as to align the alignment pattern with predetermined reference positions. During each period between these sets of correction intervals, the position data thus derived are held stored and are continuously utilized for controlling the deflection of respective electron beams used in generating the primary colors, to thereby implement automatic convergence alignment adjustment.

Abstract: A television receiver converts a television signal of a standard television system currently employed into a signal at a horizontal scanning frequency of n (an integer of 2 or more) times that of the original television signal, so that it can visually reproduce any one of a television signal of the standard television system and a television signal of a second television system, which has a horizontal scanning frequency of about n times that of the television signal of the standard television system. When receiving the television signal of the standard television system, the horizontal deflection circuit operates at a horizontal scanning frequency n times that of the standard television system. When receiving the television signal of the second television system, it operates at the horizontal scanning frequency of the second television system.