Abstract: According to the invention, a process is provided for controlling illumination of a pixel in a field emission display. In one embodiment, the process includes the steps of providing a first voltage to the first tip array, providing a second voltage to the second tip array in which the second voltage is different than the first voltage. In another embodiment of the invention, a field emission display is provided which has a plurality of pixels, each pixel having at least a first tip array and a second tip array, a column conductor, or electrode, an electrical communication with the first tip array.

Abstract: A three-dimensional display apparatus includes a liquid crystal panel 1 for displaying a discrete Fourier transformed image and a slit panel 2 having a convex lens function in a horizontal direction and a plurality of slits 3 arranged in a zig-zag manner, which is disposed in front of the liquid crystal panel 1. Since a spatial image is generated by such a configuration, a wide viewing region can be obtained. Since the number of slits positioned in the horizontal direction is increased as that of a slit pattern of a conventional slit array, the deterioration of resolution in the horizontal direction is reduced. Furthermore, since the slits are arranged in a zig-zag manner, the area of each light-shielding portion between sampling positions is reduced, thereby preventing an optical means from obstructing the observation of images.

Abstract: A computer input device has a housing and position sensors in the housing which combine a two dimensional translation sensor, such as a rollerball, with a rotatable circular member, such as a rotatable ring. An encoder measures rotation of the ring relative to the housing and provides a third dimensional input to a host computer. The third dimensional input may be used by a host computer together with a two-dimensional input from the two dimensional position sensor to allow the simultaneous three dimensional direct manipulation of graphical objects on a computer display. Preferably the two dimensional translation sensor is located in the center of the ring. Preferably the two dimensional translation sensor can be disabled by tilting the housing to lift the two dimensional translation sensor out of contact with a surface while maintaining the ring in contact with the surface to provide a 1-D control. This device permits smooth intuitive switching between 1-D, 2-D and 3-D control modes.

Abstract: An IC driver mounted on a LCD display package contains a sensor for determining temperature of the LCD cell, and a digital value of the temperature is serially transmitted to a remote microprocessor which determines compensated voltage and sends voltage command data back to the IC driver which produces a drive voltage by a charge pump. A digital code on the LCD cell identifies cell response characteristics and the code is used by the microprocessor to calculate the desired voltage. A ROM in the IC driver stores many bit-mapped images which are selected by the microprocessor for display.

Abstract: A driving circuit in a matrix type image display apparatus including a plurality of groups each including four standard unit circuits and one backup unit circuit. Each standard unit circuit includes disconnecting means for isolating the standard unit circuit from the driving circuit, and the backup unit circuit includes connecting means for connecting the backup unit circuit to an input signal line and an output signal line of any of the standard unit circuits within a group. The number of the backup unit circuits can be changed in accordance with a conforming ratio of each unit circuit, which makes it possible to eliminate idle backup unit circuits while maintaining a high overall conforming ratio of the driving circuit, thereby enhancing manufacturing efficiencies and reducing manufacturing costs.

Abstract: A front cover assembly is provided for use with a touch sensitive display device. The touch sensitive display device includes a display such as a Cathode Ray Tube (CRT) or Liquid Crystal Display (LCD). The front cover assembly has a top cover, an infrared bezel and a piece of glass. The top cover is inserted into a mold along with the piece of glass. The top cover and glass are then held in place by a vacuum while polyurethane is injected to fill the void between the glass and the top cover and the mold. The polyurethane is injected using injection molding techniques. The polyurethane used must have the properties of flexibility, durability and must also be transparent to infrared light. The polyurethane provides a mechanical lock around the glass and top cover and thus the polyurethane compensates for the different rates of expansion and contraction of the glass and the top cover due to temperature variations in the ambient environment.

Abstract: A display scrolling circuit is provided which can give a variety to a display image by scrolling the display image for every display line without provision of a burden on a processor for computing a game. A game system to which the present invention is applied has a CPU 10, a video RAM (VRAM) 12, a character generator (CG) 14, scroll registers (SR) 16, 18, 20 and 22, a VRAM address control circuit 30, a CG address control circuit 32, an in-character transverse correction circuit 34 and a color palette 36. The VRAM 12 stores vertical and horizontal position data for every display line and absolute flags AF indicating whether these vertical and horizontal position data are absolute or relative values. The VRAM address control circuit 30 reads the position and other data from the VRAM 12 during the horizontal blanking period to set the read addresses of the VRAM 12 required to display one line. Therefore, the amount of scrolling for every display line can be set without provision of a burden on the CPU 10.

Abstract: A gray scale display method includes converting the binary code of conventional picture data into an optimal code, based on display system characteristics. Gray levels of an image to be displayed are error-diffused and displayed using frame rate modulation. In order to reduce the likelihood of saturation of the gray levels, the maximum value of data displayed according to the optimal code is greater than or equal to the maximum value of the picture data displayed according to a conventional binary code. In addition, the number of adjacent gray levels is minimized. As a result, the driving voltage for driving electrodes in a display device and picture cross talk are reduced.

Abstract: A printed circuit board comprises a plurality of board layers and a plurality of wiring layers both of which are laminated. When a wiring pattern is disposed at one side against the center line, a dummy wiring pattern is formed at the place substantially symmetrical to the position where the wiring pattern is disposed to suppress a warp of the printed circuit board caused by temperature changes and to ease connection work between the printed circuit board and units, such as TABs for driving liquid crystal.

Abstract: A current controlled field emission display includes a current control circuit coupled to respective emitters to control current flow through the emitters. The control circuit includes a limiting resistor to limit the current flow to the emitters. To compensate for temperature or other variations in the resistance of the limiting resistor, the control circuit also includes a compensating resistor that produces an offsetting change in a driving voltage within the control circuit. As the resistance of the limiting resistance drops, which would allow the current through the emitter to increase, the compensating resistor produces an offsetting voltage drop that increases the voltage across the limiting resistance to maintain the current through the limiting resistance constant. The offsetting current reduction thus reduces the overall effect of temperature on current flowing through the emitter set.

Abstract: A service information receiving device receives pay service information and year/month/day-of-month data, both multiplexed with FM broadcast radiowaves and transmitted from an FM broadcasting station. The device compares the use end date data, stored in an information storage medium which is detachable from the device, with the year/month/day-of-month data received by the device, and the device permits the display of the pay service information during the period in which these two sets of data disagree with each other, and after they have coincided with each other, inhibits the display of the pay service information.

Abstract: A hand-held device such as a mouse is provided for inputting into a computer relative positional information during movement of the device over a generally planar surface and for inputting an optical image of an object located thereunder. The device includes a housing adapted to be grasped by a user and moved along the surface. A positional transducer is mounted in the housing for generating first signals representative of the amount of movement of the device over the surface. An area imager is located within the housing for recording an image of an object and for generating second signals representative of the image.

Abstract: A computer mouse for generating and delivering control signals to a computer includes a foot-operated device having a housing with a top foot engaging surface, a bottom surface and an interior with one or more rollers rotatably captivated therein and disposed in moving engagement with a fixed surface. Movement of the user's foot is transmitted to the rollers, causing rotation of the rollers in a direction corresponding with the direction of foot movement. Detectors within the housing sense movement of the rollers in the x and y directions and translate the roller motion into electrical signals by generating pulses. A micro controller receives and interprets the pulses to determine linear direction of movement of the rollers in the x and y direction and transmits the interpreted data to a computer. Mechanical clicking operation is provided, wherein the one or more rollers are axially moved in response to downward force of the user's foot on the mouse, causing a switch to be operated momentarily to an on state.

Abstract: In an image forming apparatus, picture display control means causes display means to selectively display a simple picture which allows a limited number of basic functions to be selected, or a standard picture which allows all the functions, inclusive of the functions available with the simple picture, to be selected. The simple picture and standard picture are switched over by software. The operation of the apparatus may be permitted only when a user code matching any one of user codes registered beforehand is input; either the simple picture or the standard picture may be set for each user code and displayed as the initial picture. The apparatus allows the operator to set up functions matching the contents of image formation and operator's skill without resorting to an openable cover for concealing a part of function setting keys.

Abstract: Infrared signal receiving and demodulating units 4, 5 are installed into radio paging receiver 10 having an illustration display function based on stored illustration data for displaying certain illustrations and a code signal sent from infrared remote control unit 20 through an infrared signal S1 are assigned to various illustrating functions and stored in memory 3, then a series of code signals corresponding to necessary illustrating functions are sent from infrared remote control unit 20 to display a certain illustration, and the illustration data of the displayed illustration are stored in memory 3 in order to answer display requests in received paging calls.

Abstract: A power supply apparatus for a display monitor includes a power factor correction circuit coupled to receive a primary voltage, for correcting a power factor of said primary voltage and generating a secondary voltage; a switch operable in response to a pulse signal; a switch control circuit for generating said pulse signal; a transformer including a primary winding and secondary windings connected to each other by mutual induction, in which the primary winding has a first terminal coupled to receive the secondary voltage and a second terminal connected to the switch, and in which the transformer is being supplied with primary induced voltage when the pulse signal has a primary duty ratio and supplied with secondary induced voltage lower than the primary induced voltage when the pulse signal has a secondary duty ratio; a rectifier for rectifying the primary and secondary induced voltages; and a smoothing circuit for smoothing an output voltage of the rectifier for application to the power factor correction cir

Abstract: A computer system having a wireless keyboard which transmits make-break signals to the computer system. The wireless keyboard and/or computer system being adapted to have television (or other remotely controllable devices) commands mapped into the wireless keyboard such that the wireless keyboard can provide standard computer keyboard commands to the computer and also remotely control another remotely controllable device.

Abstract: An image data control apparatus comprises a first circuit to generate image data, a second circuit to discriminate a display mode from a main body side and a third circuit to convert the image data in accordance with the discriminated display mode.

Abstract: A pixel driving circuit (400) receives a signal voltage VA from a column bus (403) and generates therefrom, a back plate electrode voltage VB which is approximately twice that of a signal voltage VA. Included in the pixel driving circuit (400) are three transistors (402, 407 and 408) and a storage capacitor (404). During a first time period, two of the three transistors turn on to charge up or discharge the storage capacitor to the signal voltage VA, while the third transistor (407) is turned off, and during a second time, the third transistor (407) is turned on to effectively double the voltage provided to the back plate electrode, while the other two of the three transistors are turned off.

Abstract: An apparatus for controlling the opacity of a liquid-crystal window, having a light emitter positioned adjacent to one side of the liquid-crystal window, a light detector positioned adjacent to the opposite side of the liquid-crystal window, and a differential amplifier/driver that compares the output of the light detector with an input control signal and generates a differential drive signal to vary the opacity of said liquid-crystal window.