Abstract: An illumination controller determines a target brightness setting value from a illuminance value measured by a illumination sensor, determines a brightness correction start time in response to a target brightness setting value and a current brightness setting value and a calculation information that are stored in a memory, calculates an amount of brightness setting change per specified time from the current brightness setting value stored in the memory and the target brightness setting value at a brightness correction start time, and outputs an output brightness setting value in response to the amount of brightness setting change that is calculated. The brightness controller adjusts brightness of the display unit in response to the output brightness setting value output from the illumination controller.

Abstract: An illumination controller determines a target brightness setting value from a illuminance value measured by a illumination sensor, determines a brightness correction start time in response to a target brightness setting value and a current brightness setting value and a calculation information that are stored in a memory, calculates an amount of brightness setting change per specified time from the current brightness setting value stored in the memory and the target brightness setting value at a brightness correction start time, and outputs an output brightness setting value in response to the amount of brightness setting change that is calculated. The brightness controller adjusts brightness of the display unit in response to the output brightness setting value output from the illumination controller.

Abstract: A pixel display device includes a decoding unit for decoding an image signal, a first storage unit for storing the image signal decoded, a second storage unit for storing the image signal whose aspect ratio has been converted, and a control unit. The control unit initializes the second storage unit by storing image data having a predetermined color tone therein, and divides the image signal stored in the first storage unit into a predetermined number of regions corresponding to the number of display pixels of a display screen. The control unit subjects the image signal stored in the first storage unit to an enlarging process, based on horizontal/vertical magnification information indicating the different magnification factors of the different divided regions in at least one of the horizontal and vertical directions, and stores the image signal subjected to the enlarging process in the corresponding regions of the second storage unit.

Abstract: To provide a pulse transmission line control system that can prevent a malfunction of microcomputers included in an apparatus configured by the microcomputers that have a function of decoding an electrical signal pulse generated from an infrared code sent from an infrared remote control unit. A main microcomputer A (1) controls on/off states of a switch (6) provided in a pulse transmission line (5) and turns on the switch (6) only when a sub-microcomputer B(2) performs a process on the infrared code sent form an infrared remote control unit (3).

Abstract: A universal-serial-bus (“USB”) hub circuit includes a switch circuit connected to a USB hub section and a plurality of upstream terminals each of which is adapted to be connected to computers. The USB hub circuit also includes a selector that operates the switch circuit to couple the USB hub section to a selected upstream terminal. A display device incorporates the USB hub circuit. A video sync signal output by an active host computer coupled to one of the upstream terminals determines which upstream terminal is to be coupled to the USB hub circuit.

Abstract: To provide a pulse transmission line control system that can prevent a malfunction of microcomputers included in an apparatus configured by the microcomputers that have a function of decoding an electrical signal pulse generated from an infrared code sent from an infrared remote control unit. A main microcomputer A(1) controls on/off states of a switch (6) provided in a pulse transmission line (5) and turns on the switch (6) only when a sub-microcomputer B(2) performs a process on the infrared code sent form an infrared remote control unit (3).

Abstract: A picture display position adjusting circuit and a display device incorporating a microcomputer detects sync timing variation therein, calculates a value to be set in a pixel quantity converter according to the detected sync timing, reads a display position of a video signal to be displayed on a picture display device from the pixel quantity converter, recalculates the display position of the video signal according to the above read out display position data, and re-sets the corrected display position data in the pixel quantity converter. In this manner, manual picture adjustment when sync signal timing changes is avoided and a picture to just fit the effective picture display area of a picture display device can be automatically displayed.

Abstract: The invention relates to a multiscanning type display apparatus having a matrix drive type display device for displaying picture signals, a picture signal supplying section for supplying picture signals to the display device, a synchronization signal supplying section for outputting synchronization signals included in the above mentioned picture signals, and a resolution power converting section for converting the resolution of the above mentioned picture signals to the resolution of the above mentioned display device.

Abstract: A video display device for displaying a wide range of video signals which allows the user to freely set the screen display width and position. A request for adjusting the horizontal display width, vertical display width, horizontal display position, and vertical display position is made through a key circuit, and a microcomputer determines the state of the key circuit. The microcomputer then recalculates the horizontal expansion rate and vertical expansion rate of a scan converter, and send recalculated data to the scan converter and a PLL circuit. The scan converter and the PLL circuit converts signals to the number of picture elements displayable on the video display device in response to a request for adjustment, and changes the phase of the enable signal which indicates a display period of the video display device to adjust horizontal and vertical display positions.

Abstract: A/D converters (15-17), a PLL circuit (18), a scan conversion circuit (1), counters (4 and 5), an OR circuit (3), flip-flops (7-13) for comparing a phase of an output signal from the OR circuit (3) with a phase of an enable signal, and a CPU (14) are provided in a LCD apparatus so that settings in the scan conversion circuit (1), counter (4 and 5), and PLL circuit (18) can be changed responsive to outputs from the flip-flops (10-13), whereby a location and a size of a picture displayed on the LCD as well as a sampling clock frequency used in the A/D conversion can be automatically adjusted.