Abstract: Control circuitry for controlling the output power of an electronic ballast system having a power supply branch circuit having power lines comprising a line voltage line and a common line, and a ballast stage having (i) inputs connected to the power lines for providing power to the lamp, (ii) internal power control feedback circuitry that defines a feedback loop for controlling the amount of power applied to the lamp, and (iii) a control signal input for receiving a control signal that affects operation the internal power control feedback circuitry and the level of power outputted by the ballast stage. The control circuitry comprises a first circuit having an input for connection to one of the power lines. The first circuit generates a control signal for input into the control input of the ballast stage.

Abstract: A focusing circuit (1) for generating a focus control signal for a cathode ray tube (3) has a modulation input (4) for influencing the focus control signal, which focus control signal contains a measure for an envelope of excursions of horizontal scan lines across the cathode ray tube. The focusing circuit (1) comprises a load control circuit (5) for influencing the focus control signal, and having a control input (6) coupled to the modulation input (4) for influencing the focus control signal by load control variation in dependence on a desired focus control signal modulation. The load control circuit (5) may comprise a current source and/or a voltage source and/or controllable impedance that have a control input for coupling to a modulation output of a synchronization processor (7).

Abstract: An improved ignition circuit for a high intensity discharge (HID) lamp is disclosed. The ignition voltage is provided across a single capacitor, and at the end of the ignition phase, a second capacitor is switched into the circuit to divide the voltage across two capacitors, and provide a steady state square wave current and voltage.

Abstract: A system and method for enabling the behavior of temporal expressions to be analyzed for the evaluation of such expressions. The process of evaluating such expressions ultimately results in the construction of a finite state machine, such that the set of non-deterministic functions for describing the behavior of dynamic and relativistic systems is reduced to such a system. The behavior of the finite state machine can then be examined and analyzed. The present invention is useful for such applications as the examination of the temporal behavior of a DUT (device under test), as well as for examining the behavior of dynamic systems.

Abstract: A ballast for feeding a high-pressure discharge lamp. The ballast: supplies the lamp with an AC voltage at an ignition frequency (fi) during an ignition period (ti), supplies the lamp with an AC voltage at a glow frequency (fg) during a glow period (tg) following the ignition period (ti), repeats the start-up sequence of ignition period and glow period (ti, tg), supplies the lamp with an AC voltage at an operating frequency (fb) during an operating period (tb) following the last start-up sequence, and interrupts the power supply to the lamp in a start-up sequence, not being the last start-up sequence, during an interruption period (td) following the glow period (tg).

Abstract: To construct a CRT display device capable of effectively suppressing unwanted radiation of electromagnetic waves occurring as a result of horizontal deflection or vertical deflection. A correction lead (6) series-connected to horizontal deflection coils (1) is disposed at outer peripheral positions of the horizontal deflection coils (1) and between the horizontal deflection coils (1) and a faceplate of a CRT (4). With this arrangement, electromagnetic fields produced by the horizontal deflection coils are canceled out by electromagnetic fields produced by the correction lead (6), thereby suppressing unwanted radiation of electromagnetic waves at the deflection frequency and its harmonic components.

Abstract: A current regulator controls the electron emission from a cold cathode using closed-loop feedback from a current sensor in the cathode connection. The regulator circuit includes a cold cathode, a current-sensing element, a current-limiting element, and current-control element. Additionally, the closed-loop current regulator may comprise a reference element for generating the reference level, a circuit power supply and a cathode bias supply. The regulator and cathode may be assembled from separate components, or the entire circuit may be integrated onto a single substrate. In one embodiment, the current level is set by adjusting the reference element directly. In a second embodiment, the current level is set by adjusting the circuit power supply, so that the current level can be set remotely without the need to adjust the reference element directly. The second embodiment is preferably suited for the regulation of beam current in analytical instrumentation.

Abstract: A transformer device includes a housing made of a dielectric material, a core received within the housing, a secondary coil wound around an outer peripheral surface of the core, a high-voltage terminal connected to a high-voltage side end of the secondary coil and a primary coil electromagnetically coupled with the secondary coil. The housing has an open axial end and a closed axial end. The high-voltage side end of the secondary coil is positioned within the housing adjacent to the closed end of the housing. A high-voltage generating apparatus includes the transformer device received within a metal case. A discharge lamp lighting system includes the high-voltage generating apparatus and a discharge lamp electrically connected to the high-voltage generating apparatus.

Abstract: An auxiliary lighting system for a high-intensity discharge lamp. In one embodiment, the auxiliary lighting system has an auxiliary light source, an HID lamp status circuit having an input for connection to a status signal representative of the operational state of a high-intensity discharge lamp wherein the HID lamp status circuit determines whether the status signal meets predetermined signal criteria, a switch circuit having a first state that effects application of a voltage source to the auxiliary light source, and a second state that isolates the voltage source from the auxiliary light source, and a control circuit responsive to the HID lamp status circuit for controlling the switch circuit. The control circuit has a first state when the HID lamp status circuit determines that the status signal meets the predetermined signal criteria and a second state when the HID lamp status circuit determines that the status signal does not meet the predetermined signal criteria.

Abstract: A color display device comprises an electron gun, a display screen and a color selection electrode as well as a deflection means. The distance between the electron beams is dynamically varied, i.e. the distance between the electron beams in the deflection plane decreases as the beams are deflected in at least one direction. The decrease of the distance enables the distance between the color selection electrode and the display screen to be increased in that direction. As a result, the curvature of the color selection electrode is increased, which has a position effect on the strength, doming and microphonics of the color selection electrode. The distance is dynamically varied by first and second means, the first means being arranged in or near the pre-focusing parts of the electron gun. Said first means comprise magnetic means outside the neck of the CRT for generating dynamically varying magnetic fields, and magnetic field conducting means to conduct the fields to a position near the electron beams.

Abstract: An object of the present invention is to provide a plasma display device that enables high-luminosity display while keeping consumption of power low. After causing reset discharge to form a wall charge in the dielectric layer of all discharge cells of a plasma display panel, pixel data are written by causing selective erasure discharge to erase, in accordance to pixel data corresponding to an input video signal, the wall charge formed in each discharge cell, and sustaining pulses, with a voltage value of at least 200 volts, are applied alternately to each row electrode of each row electrode pair of the plasma display panel to repeatedly cause sustained discharge to occur only in discharge cells having residual wall charge.

Abstract: An electroluminescent device having a transparent substrate extending in the lengthwise direction of the device, a transparent conductive layer placed on the back surface of the transparent substrate, a luminescent layer having a width smaller than the width of the transparent conductive layer and being placed on the back surface of the transparent conductive layer, a rear electrode placed on the back surface of the luminescent layer, and at least one buss which is placed on the part of the back surface of the transparent conductive layer having no luminescent layer, has a width smaller than the width of the transparent conductive layer, and is electrically in contact with neither the luminescent layer nor the rear electrode in which the transparent conductive layer, the luminescent layer, the rear electrode and the buss continuously extend in the lengthwise direction of the transparent substrate.

Abstract: A light emission device includes organic light emission element arrays for red, green and blue, each of which has a plurality of microscopic organic light emission elements arranged in line. Three-color recording light beams of one line emitted from said organic light emission element arrays are applied to an instant photo film through corresponding condenser lenses and graded-index type optical fiber. The condenser lenses are formed integrally with a surface of a transparent plate, on the other side of which the organic light emission element arrays for red, green and blue are stacked. In order to correct axial chromatic aberration, radius of curvature of each condenser lens is varied in accordance with the color of light beam emitted from corresponding organic light emission element.

Abstract: The present invention 10 discloses a remote powered electrodeless light bulb 12 and an RF transmitter 14. The bulb 12 requires no electrical connection and will not burn out, can be submerged into water without causing electrocution, is safe and non toxic and has many uses. The bulb 12 may be of any size or shape, and is filled with inert argon gas and or other inert gases under vacuum. The transmitter 12 emits an RF field from a distance of 1 to 25 feet and comprises a variable frequency adjustment knob 16, an output power field adjustment knob 18 and a special effects transmitter knob 20 for changing the pulse/strobe rate. Also shown is a power source 22, a base 24, which may be made of metal, a chassis ground wire 26, an antenna 28, and a transmitter housing 30.

Abstract: Method for implementing electronic circuit designs that are adaptable to different binary data formats. Separate packages are provided for the different binary data formats. The names of the constants and subtypes are identical as between the packages, and the values associated with the constants and subtypes in each of the packages are particular to the associated data format. A selected one of the packages is imported into the. design, and selected references in the design to binary data are made using the names of the constants and subtypes set forth in the packages. The circuit design is then implemented by synthesizing and mapping the design to the selected device.

Abstract: A laser CRT includes a cathode, a modulator having an orifice for forming an electron beam from the electrons emitted by the cathode, and a beam directing unit directing the electron beam formed by the orifice of the modulator to the laser screen of the laser CRT. To reduce the diameter of the electron beam and to thereby improve the resolution of the laser CRT, the laser CRT includes at least one other modulator having an orifice for forming another electron beam from the electrons emitted by the cathode, the beam directing unit being adapted for directing the other electron beam formed by the at least one other modulator to the laser screen.

Abstract: The present invention provides an inductively coupled RF plasma source that can improve the nonuniformity in substrate treatment by canceling out the radial electric fields generated between a plasma and an antenna coil. The inductively coupled RF plasma source comprises a plurality of one-turn antenna coils, each having one end connected to a RF supply along a circumferential side wall of a plasma generating chamber and the other end connected to a grounding potential, arranged at intervals in the longitudinal axial direction of the plasma generating chamber. One end of each one-turn antenna coil displaced at equal angles from each other in a circumferential direction.

Abstract: Auxiliary deflection coils are connected to horizontal deflection coils. Each auxiliary deflection coil is disposed in the intermediate region between the inner peripheral end adjacent to a window and the outer peripheral end. Each horizontal deflection coil is dividable into three regions extending from its winding introductory part to its winding terminal part. A variable inductance coil is connected in parallel with the intermediate region to control the horizontal deflection current flowing across the horizontal deflection coil. The variable inductance coil has a cylindrical core installed in a hollow space of a bobbin and a coil connected in parallel with the auxiliary coil. A disc core is provided adjacent to the coil. The disc core has an end face larger in area than an end face of the cylindrical core.

Abstract: A fluorescent lamp lighting apparatus includes a fluorescent light emitting tube; and an electronic lighting circuit for applying an electric current to the fluorescent light emitting tube. The electronic lighting circuit includes a pair of electrode filaments provided in the fluorescent light emitting tube, a pair of capacitors each connected in series to a respective one of the pair of electrode filaments and connected parallel to the fluorescent light emitting tube, and an inductor connected in series to one of the pair of electrode filaments.

Abstract: A circuit and method for turning-on and turning-off elements of an field emission display (FED) device to protect against emitter electrode and gate electrode degradation. The circuit includes control logic having a sequencer which in one embodiment can be realized using a state machine. Upon power-on, the control logic sends an enable signal to a high voltage power supply that supplies voltage to the anode electrode. At this time a low voltage power supply and driving circuitry are disabled. Upon receiving a confirmation signal from the high voltage power supply, the control logic enables the low voltage power supply which supplies voltage to the driving circuitry. Upon receiving a confirmation signal from the low voltage power supply, or optionally after expiration of a predetermined time period, the control logic then enables the driving circuitry which drives the gate electrodes and the emitter electrodes which make up the rows and columns of the FED device.