Patent ID: 9093985
Filing Date: 2015-07-28
Classification: G06F,G09G,H03J,H03L

Abstract:
1. A control apparatus, applied to a portable multi-media apparatus, comprising: a driver, comprising: an oscillating circuit, that generates a feedback signal and receives a calibration signal, the oscillating circuit further configured to determine an operating frequency based at least in part on a calibration value indicated in the calibration signal by way of selecting a corresponding set of a fine-tuning circuit, an image processing unit, coupled to the oscillating circuit, that generates a display control signal according to the operating frequency and provides the display control signal to a display of the portable multi-media apparatus, the image processing unit configured to generate the display control signal such that an offset between a frequency of the display control signal and a predetermined frequency is smaller than a predetermined error to meet operating requirements of the portable multi-media apparatus; a baseband controller, coupled to the driver, that receives the feedback signal and outputs the calibration signal to the driver according to the feedback signal, wherein a frequency of the feedback signal is correlated to the operating frequency; and a crystal oscillator, coupled to the baseband controller, that provides a reference output frequency to the baseband controller, the reference output frequency being used for generating the calibration signal, wherein the display apparatus provides a user interface that presents an option of performing a calibration process resulting in generating the calibration signal, and wherein the baseband controller comprises a look up table and the baseband controller is configured to search for a calibration code corresponding to the calibration value, the calibration code controlling the fine-tuning circuit.