Abstract: A timing controller of a display apparatus is provided. The timing controller timing controller includes a processing unit and a memory unit. The processing unit is configured to receive external display data and a control signal. The external display data includes a plurality of images. The memory unit is electrically coupled to the processing unit and an external memory unit storing with a plurality of optical lookup table. The memory unit is configured to store with one of the plurality of optical lookup table according to the control signal received by the processing unit and output optical data corresponding to a currently-displaying image in the optical lookup table stored in the memory unit. The memory capacity of the memory unit is less than that of the external memory unit. An operation method for the timing controller is also provided.

Abstract: An operation method for a navigator is provided, the operation method comprising: determining whether a voice signal for playing in the navigator is received by the navigator, if yes, and the navigator is operated in a voice navigation mode, switching the navigator from the voice navigation mode to a reminder mode; and detecting whether the voice signal is stopped, if yes, the navigator is operated from the reminder mode to the voice navigation mode.