Abstract: A method for driving a pointing device of a computer system is provided. In the method, a pointer is positioned in a user interface area for performing a specific command such as an icon, a menu bar, and a menu button. If the pointer is moved from the user interface area to a specific area over a predetermined distance, an amount of the position change of the pointer is detected and if the amount thereof corresponds to a button click of the pointing device, the same pointing signal as that of a corresponding button click is generated. It is therefore possible to perform the same function as a button click when the pointer is moved in a specific direction over a predetermined distance without using a button of the pointing device. Thus, a user is able to more conveniently use the pointing device, and changing a holding form while clicking the button of the stylus can be advantageously reduced or suppressed.

Abstract: A method for switching a keypad is to adopt an externally coupled keypad to a personal computer, wherein a switching program for switching between a hot-key function and a Num Lock function is programmed in a microprocessor of the keypad; when a hot-key or a Num Lock key is pressed, the hot-key function or the Num Lock function is enabled. Besides, every key of the keypad is printed with a figure and a symbol for performing at least two functions.

Abstract: A plasma display panel drive art capable of restraining a contour noise in a picture displayed on a PDP and reducing a maximum power consumption. The drive art allows one frame to be consisted of a plurality of sub fields each having a different weighting value for brightness so as to display a video signal of gray scale. The plurality of the sub fields are differently arranged along with a distribution of logical values in the video data for one frame, thereby dividing the one frame into a display interval and a non-display interval. Also, the plurality of the sub fields are equal to sub fields without a sub field having a least weighting value for the brightness.

Abstract: A touch system using a plurality of infrared (“IR”) transmitters and receivers, and a method of determining with increased resolution the location of a touch between the IR transmitters and receivers using on-axis and off-axis detection are disclosed. The inventive touch system and method use, in conjunction with the on-axis and off-axis detection, a coarse and fine sweep of the transmitters and receivers to increase the resolution of identified touch location. The method of determining a touch location involves selection and activation of particular off-axis infrared transmitter and receiver pairs determined from a triangulation interdependence between the x and y coordinates. The increased resolution of the identified touch location is achievable using the inventive system and method without the need for an increased number of IR transmitters and receivers and without the need for higher speed processing capability.

Abstract: An ergonomic mouse accessory that allows the user to vary the manner in which the control buttons of the mouse are operated, thereby reducing or eliminating repetitive strain injuries (RSI). A trigger arm rises from an attaching means, wherein the attaching means interconnects with the mouse. The user can rotate and otherwise position the trigger arm to constantly change the manner in which the mouse buttons are manipulated.

Abstract: A circuit for compensating a horizontal centering in a video display apparatus includes a control circuit, a horizontal centering compensation circuit, and a horizontal deflection output circuit. The circuit functions such that even when the video display mode of a multi-mode monitor is shifted, any biasing of the picture can be automatically minimized or prevented. The control unit counts the frequency of externally input video synchronizing signals to output a first switching control signal or a second switching control signal based on the counted result of the frequency of the video synchronizing signals. The horizontal centering compensation circuit provides a first power and a second power, the first and second powers having voltage levels and directions different from each other, to output the first power or the second power in response to the first switching control signal or the second switching control signal of the control unit.

Abstract: An addressing method induces increased light output in an organic light emitting display by applying several excitation currents to each row in an display per frame. The row excitation pulses may advance sequentially across every row in the display and, when the row driver reaches the last row in the display, the row driver returns to the first row in the display and begins again. In an embodiment, the row driver may complete 100-1000 cycles across all rows in the display for each frame. This method of addressing the display yields increase light output with a correspondingly lower-powered excitation current.

Abstract: An active matrix electroluminescent display device has an array of current—driven electroluminescent display elements (20), for example comprising organic electroluminescent material, whose operations are each controlled by an associated switching means (10) to which a drive signal for determining a desired light output is supplied in a respective address period and which is arranged to drive the display element according to the drive signal following the address period. Each switching means comprises a current mirror circuit (24, 25, 30, 32) which samples and stores the drive signal with one transistor (24) of the circuit controlling the drive current through the display element (20) and having its gate connected to a storage capacitance (30) on which a voltage determined by the drive signal is stored. Through the use of current mirror circuits improved uniformity of light outputs from the display elements in the array is obtained.

Abstract: The present invention concerns a control device (21) for a liquid crystal display cell (1) including electrodes (1.1a; 1.1b; 1.1c) forming segments and/or symbols. This device includes control means (33a; 33b; 33c) for providing control signals to said electrodes; and a matrix network of connection paths (45; 47; 49; 50) whose columns (49; 50) are connected to said control means, and whose lines (45; 47) are connected to receive address signals and data signals representative of said control signals. This device further includes switching means (52) arranged at each of the intersections of said network, each of said switching means being arranged so as to be able to be switched permanently into the conducting state or the non conducting state, in accordance with a circuit layout predetermined as a function of said cell.

Abstract: An apparatus for quickly displaying a video signal on a display upon power ON using a microcomputer to control the display when the power is switched on. The microcomputer transmits a first control signal for regulating a gain of the video signal to a pre-amplifier, after a power circuit is switched ON, and outputs a second control signal for regulating bias level of the video signal amplified and outputted by a main amplifier connected to the pre-amplifier.

Abstract: A circuit for compensating a brightness level of a video display apparatus capable of simplifying a circuit configuration and reducing a cost of production by placing a brightness level compensation circuit for the video display apparatus is disclosed. Microprocessor memorizes a predetermined data for a brightness level compensation and outputs a data signal and a clock signal based on the data for the brightness level compensation. Video pre-amplifier receives a video signal and horizontal and vertical fly-back pulse signals from an outside and controls a contrast level and compensates a brightness level of the video signal in accordance with the data signal and the clock signal to output a compensated video signal. Accordingly, the design of the brightness level compensation circuit is simplified and the size of the printed circuit board is reduced.