A system and method for dynamically correcting display characteristics to compensate for non-uniformities is disclosed. In the preferred embodiment, the display screen is divided into logical tiles, and then the initial correction parameters of the characteristics under consideration, namely convergence, brightness, hue, and beamlanding, are measured at the vertices of each tile. The dynamic correction circuitry automatically synchronizes the correction waveforms, which are functions of the locations on the physical display screen, with the control signals of the displayed image. Due to the synchronization, the previously stored initial correction parameters of the characteristics under consideration may be used to dynamically correct for uniformity of these characteristics. The preferred embodiment performs linear vertical and horizontal interpolation on the correction values between the vertices of the tiles.

A technique for controlling power of an audio processor in a monitor, which processes an audio signal from a computer system and outputs the processed audio signal to a speaker, in which an audio processor power control circuit includes: a power supply circuit for supplying operating power to the audio processor; a microcomputer for controlling an operating mode of the monitor according to an operating mode of the computer system and for adjusting an output volume of the audio processor, and a power switching device, operated under the control of the microcomputer, to supply the operating power from the power supply circuit to the audio processor upon the operating mode of the monitor being in a normal mode or a standby mode and to block the operating power from the power supply circuit to the audio processor upon the operating mode of the monitor being in a suspend mode or a power off mode. The technique has the effect of preventing abnormal oscillation from occurring in the suspend and power off modes and reducing power consumption of the monitor.

A source driver of a liquid crystal display (LCD) having a multi-scan function and a method for driving the same are disclosed, the source drive of an LCD includes a shift register for shifting and outputting a carry input/output (I/O) signal, a latch section including first, second, and third latches for sequentially storing R, G, and B external image signal data, holding the stored data, and outputting stored image signal data synchronously with the carry I/O signal. Further, a digital/analog (D/A) converter for converts the image data output by the latch section into an analog image signal based on external POL signal, a data output part for outputs the analog image signal, and a controlling section controls operation of the three latches so as not to operate data input and data output in the same latch.

A display device including a clock generation circuit for generating sampling clocks, whose frequency is variable, on the basis of a horizontal synchronizing signal of an input image signal; an analog-to-digital converter for sampling the input image signal on the basis of the sampling clocks generated from the clock generation circuit; calculation device for calculating the number of sampling clocks outputted from a horizontal image start position to a horizontal image end position in image data outputted from the analog-to-digital converter, comparison device for comparing the number of sampling clocks calculated by the calculation means with a previously set value, and a controller for controlling the frequency of the sampling clocks outputted from the clock generation circuit on the basis of the results of the comparison in the comparison means.

A mask circuit masks a digital video signal so that a video signal of an analog video signal is not outputted for a predetermined period after the start of output of a horizontal synchronizing signal of the analog video signal. A period of masking the digital video signal by the mask circuit is set in a control register, and the control register transmits the masking period to the mask circuit. A digital video signal to analog video signal converting unit converts the digital video signal masked and outputted from the mask circuit into an analog video signal. Thus, by setting in the control register the period of masking the digital video signal until the video signal of the analog video signal is stabilized, a digital video encoder can output a stable video signal.