Abstract: A self-oscillating bridge circuit comprises a start circuit for rendering one of the switches conductive for the first time at the start of operation. The start circuit is configured in such a way that it does not influence the switching of the bridge switches during stationary operation.

Abstract: A glass panel for a cathode ray tube comprises a substantially rectangular face portion on which images are displayed and a skirt portion continuous to the face portion through a blend R portion. An effective screen size of the face portion in a diagonal direction is 500 mm or more, an average radius of curvature of an outer surface of the face portion is 10000 mm or more in all radial directions from a face center portion, and a difference in height between the face center portion and an edge portion of the effective screen in the diagonal direction on an inner surface of the face portion is in a range from 9 mm to 17 mm.

Abstract: A deflection yoke has first and second horizontal deflection coils formed of a solid wire. A first bobbin and a second bobbin are formed in one-piece construction with each other. The first coil-end lead of the first horizontal deflection coil and the second coil-end lead of the second horizontal deflection coil are wound around the second bobbin to form a balance coil such that the balance coil is formed continuous with horizontal deflection coils. After the first and second horizontal deflection coils and the balance coil have been wound around the respective bobbins, the second bobbin may be separated from the first bobbin and then the second bobbin may be mounted to a desired part of the first bobbin.

Abstract: A method for activating an illuminator and an illuminating device. The invention uses pins on an application specific integrated circuit (ASIC) in a scanner to output pulses of different frequencies. The illuminator has different efficiencies at different frequencies, so the heat generated by the illuminator at the frequencies of inferior efficiency is used to achieve fast warm-up, and the voltage output frequency of the highest light efficiency is provided to the illuminator after warm-up. The illumination device can be designed according to the activation method. It comprises an illuminator, a pulse output unit, a driving unit and a power supply unit. The power supply unit outputs the frequency needed for the warm-up period and the frequency needed for the working period. The driving unit activates the pulse output of the pulse output unit.

Abstract: When a contact terminal 11 is mounted by being inserted into a bobbin 12 from the bottom end thereof, the contact terminal 11 is fixed to the bottom part of the bobbin 12 by the action of raised tabs 11c which prevents the contact terminal 11 from coming off. Next, a folded portion 13c formed on the bottom end of a coil element 13 is inserted into the bobbin 12 from the top thereof, and the folded portion 13c is fixed there by being press-fitted between press-fitting members 11b. Next, a top cover portion 10 is fitted by insertion to the bobbin 12 from the top of the coil element-supporting bobbin 12. As a result, four coupling members 10a are fixed by being inserted between first ribs 12c and second ribs 12d formed in the bottom part of bobbin 12. Since this helical antenna is assembled without the need of using assembly jigs or tools and without using adhesives, assembly can be done easily, and costs can be reduced.

Abstract: A method for driving a self-scanning light-emitting element array, in which a power consumed in a write signal limiting resistor provided outside a chip to suppress a temperature rising of an optical writing head. The difference between High-level and Low-level in a circuitry in the driver circuit for controlling the light-emitting portion in the chip is set so as to be lower than the difference between High-level and Low-level in a circuitry in the driver circuit for controlling the transfer portion in the chip. A power consumed in a write signal limiting resistor provided outside the chip may be decreased to suppress the temperature rising of the optical writing head.

Abstract: The invention provides a circuit for controlling a cathode ray tube. The circuit comprises a source of input color signals (Uin(R), Uin(G), Uin(B)) for the primary colors of the cathode ray tube. Output amplifiers are coupled to the source of color input signals and to electron guns of the cathode ray tube. Finally, limiting means are provided to limit the color input signals to a predetermined threshold value. In this way the output amplifiers are prevented from saturation and undesirable smears do not appear on the screen. In an advantageous embodiment the limiting means are realized by a diode biased in reverse direction.

Abstract: This invention relates to a power supply that integrates a rectifier/filter's circuitry and a converter's circuitry with an inverter to reduce space occupied and increase power efficiency. The power supply includes: a rectifier/filter, a DC-DC converter and a DC-AC inverter. The rectifier/filter, connected to an alternating current (AC) input terminal, converts the input AC into a direct current (DC). The DC-DC converter and the DC-AC inverter are parallel to each other with one end concurrently connected to the rectifier/filter's output and the other end respectively outputting the desired powers. As such, DC-DC converter reduces the converted DC voltage to lower DC voltages to power all circuits except for the lamp and DC-AC inverter converts the converted DC voltage into higher AC voltage output to drive the lamp.

Abstract: A wireless lighting system for providing convenient illumination where needed with centralized control. The wireless lighting system includes a main transmitter assembly providing a centralized control capability; including a housing defining an interior space and a transmitter member positioned substantially within the housing for generating and transmitting control signals, and a plurality of lamp assemblies each having a base portion and a lamp member. Each lamp member selectively provides illumination. Each one of the base portions has a base housing defining an interior space and an energy storage member positioned within said housing for selectively providing electrical current to an associated lamp member. Additionally, each one of said base portions includes a receiver portion positioned within the housing for receiving control signals generated and transmitted by the transmitter member.

Abstract: A discharge lamp driver circuit is provided which features a field canceller. The driver circuit includes a power supply circuit which turns on and off a switching element to step up a dc voltage and provide it for turning on a discharge lamp. The power supply circuit includes an electrical path through which an interrupted current arising from the on-off operation of the switching element flows. The field canceller includes an electric line through which the interrupted current having passed through the electrical path flows in an opposite direction, thereby producing a field canceling a field caused by flow of the interrupted current through the electrical path.

Abstract: A lamp lighting apparatus including a voltage control section for supplying a pulse voltage whose peak value rises stepwise, and a power conversion section for converting an output of the voltage control section into a high voltage and applying the high voltage to a lamp to light the lamp and for supplying, after the lamp is lit once, a self-sustaining discharge current to the lamp.

Abstract: A liquid crystal display (LCD) device has a first side and a second side in parallel with the first side. The LCD device includes a front light source positioned on the first side of the LCD device for generating light beams, and a transflective liquid crystal panel. The transflective liquid crystal panel includes a first glass substrate located between the front light source and the second side of the LCD device, a second glass substrate located between the first glass substrate and the second side of LCD device, and a transflective layer located between the first glass substrate and the second glass substrate for reflecting and transmitting the light beams generated by the front light source. The LCD devices can display images both through the first side and through the second side.

Abstract: The invention relates to a high-pressure discharge lamp comprising a discharge vessel which is enclosed, with clearance, by an outer bulb. The outer bulb is closed at one end by a lamp cap. The lamp is provided with an ignition circuit including at least a series arrangement of a glow starter and an ohmic impedance. According to the invention, the ohmic impedance is formed by a halogen incandescent lamp.

Abstract: A high pressure discharge lamp includes a light-transmissive ceramic discharge vessel with an envelope having a maximum outer diameter D1 and open ends, a metal pipe having one end, i.e., a top end fused in the open end of the light-transmissive ceramic discharge vessel and the other end, i.e., a base end protruding from the light-transmissive ceramic discharge vessel, a pair of electrodes each having one end, i.e., a base end connectively supported on the base end of the metal pipe and the other end, i.e., a top end extending within the light-transmissive ceramic discharge vessel, and a discharge agent which is filled in the light-transmissive ceramic discharge vessel, wherein it is also characterized by that the high pressure discharge lamp has an overall length L1, and the overall length L1 and the maximum outer diameter of D1 satisfies a following equation. 1.5≦L1/D1≦4.

Abstract: A vehicle lamp has light sources having light emitting diodes that are vertically and horizontally disposed in the form of a square. A first LED group is disposed in the central position of the light source and is turned on in the tail lamp lighting mode. A second LED group surrounds the first LED group, and is turned on together with the first LED group in the stop lamp lighting mode. Thus, the light source appears as if the LEDs became luminous around the central position of the light source in any lamp lighting mode.

Abstract: An ion implanting system including an ion implanting chamber for implanting an ion into a semiconductor wafer, a load lock chamber for loading the semiconductor wafer into the ion implanting chamber, a turbo pump for creating a high vacuum atmosphere in the load lock chamber, a low vacuum pump for creating a low vacuum atmosphere in the turbo pump, a cryo pump controller for generating a control signal to control a pumping operation of the turbo pump, a control voltage generator for generating a control voltage in response to the control signal generated from the cryo pump control, an interface for generating a starting signal in response to the control voltage, and a turbo pump controller for applying a voltage to operate the turbo pump and the low vacuum pump in response to the starting signal output from the interface.

Abstract: A display interface is arranged to processes analog input signals to provide digital output signals. The display interface includes a series of programmable current sources, an input buffer circuit, a first reference buffer circuit, a second reference buffer circuit, and an analog-to-digital converter. The programmable current sources are arranged to provide first and second reference signals, which are buffered by reference buffer circuits and provided to the analog-to-digital converter. The input buffer circuit provides a buffered input signal to the analog-to-digital converter, and operates in an open-loop configuration for improved operating speed. The analog-to-digital converter is configured to provide a digital output signal (DOUT) in response to the buffered input signal. The analog-to-digital converter includes gain and offset settings that are changed by adjusting the progranmnable current sources. The programmable current sources and reference buffer circuits are outside of the input signal path.

Abstract: An electronic ballast operates a gaseous discharge lamp. The electronic ballast includes a filter circuit for removing noise from an electrical power signal. The power factor of the filtered power signal is adjusted by a power factor correction circuit. The power factor correction circuit includes a programmable inductor circuit having a plurality of selectable inductance values for varying the amount of power factor adjustment to accommodate operation of different lamp types and/or different lamp wattages. A power supply circuit converts electrical power received from the filtered power signal to provide low level power for operating the electronic ballast. An output circuit receives the corrected power signal produced by the power factor correction circuit and produces an electrical signal to ignite and operate the discharge lamp.

Abstract: A light-emitting diode (LED) light source control method is disclosed. The light-emitting diode light source control method is used for controlling a composite and a single color LED light source. The composite color LED light source can provide two of the three original red, green and blue color lights and the single color LED light source provides the third original color. The composite and the single color LED light sources provide illuminations sequentially so that the light sources need not to be turned on continually and the data generated by the composite and the single color lights on the red, green and blue channels of image sensors can be processed sequentially.

Abstract: A method and system for controlling electron densities in a plasma processing system. By applying a dither voltage and a correction voltage to a voltage-controlled oscillator, electron (plasma) density of a plasma processing system (acting as an open resonator) may be measured and controlled as part of a plasma-based process.