Abstract:
PROBLEM TO BE SOLVED: To provide a method for shortening time duration till reaching to a rated optical output and a stabilization circuit without damaging a lamp. SOLUTION: During a start-up period of the metal halide lamp to a steady state operation, the method continuously calculates a power P by measuring a lamp current I and a voltage V, continuously evaluates a requested power P req and a requested current I req to operate the lamp at the rated optical output L n during the start-up period, supplies a current limit value I lim to operate the lamp when I req ≥I lim , and supplies the requested power P req to operate the lamp when I req lim . COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a ballast for shortening time duration till reaching to a nominal optical output without damaging a lamp. SOLUTION: A method of controlling start-up of a metal halide lamp having a nominal light output during a steady state operation and a current limit I lim , during start-up of the metal halide lamp to steady state operation, evaluates a requested power P req and a requested current I req to drive the lamp at the nominal light output L n during the start-up, supplies I lim to drive the lamp during I req ≥I lim , supplies P req to drive the lamp when I req lim , and modulates power P supplied to the lamp. The power modulation is advantageously carried out at an acoustic resonance frequency of the lamp, such as the first azimuth resonance mode of the lamp. The power modulation may carry out sweeping of a sine wave ripple on a peak of an input voltage waveform, and a frequency range of the sine wave ripple includes an acoustic resonance frequency. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an HID lamp reigniting quickly without using extremely high voltage. SOLUTION: A first starting electrode includes a thermal machine member. In case the thermal machine member is in a low-temperature state, an inner side terminal part of the first starting electrode is located at a first position, and in case it is in a high-temperature state, the inner side terminal part of the first starting electrode is located at a second position. In the low-temperature state, an impedance which goes from an outer side terminal part of the first starting electrode to an inner side terminal part of a second starting electrode through the inner side terminal part of the first starting electrode, is lower than an impedance which goes from an outer side terminal part of a first main electrode to an inner side terminal part of a second main electrode through an inner side terminal part of the first main electrode. In the high-temperature state, an impedance which goes from the outer side terminal part of the first starting electrode to the inner side terminal part of the second starting electrode through the inner side terminal part of the first starting electrode, is higher than an impedance which goes from the outer side terminal part of the first main electrode to the inner side terminal part of the second main electrode through the inner side terminal part of the first main electrode. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a ballast equipped with a control circuit that can be obtained economically and energy-efficiently in an existing ballast. SOLUTION: The ballast has an inverter having an inverter output terminal and in which an inverter output voltage is supplied to the inverter output terminal, a resonance output circuit connected between the inverter output terminal and a lamp and in which an ignition voltage is supplied, and a control circuit connected between the resonance output circuit and the inverter. The control circuit monitors the voltage, and when the monitored voltage reaches a prescribed level, the inverter is controlled to maintain an operating frequency at a present value over a prescribed time so that the resonance output circuit is made to maintain the ignition voltage at an appropriate level over a prescribed time, and when the lamp is ignited within a prescribed time, the control of the inverter is stopped and the operating frequency is prevented from reducing to the prescribed minimum value or lower during a lamp stabilized period, and when the lamp is not ignited within the prescribed time, the inverter operation is shut down. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve operation of a metal halide arc-discharge lamp. SOLUTION: The lamp includes the outer tube 12 having a metal-cap end part 12a arrayed along an axis line 14 in a longitudinal direction of the outer tube, an intermediate part 12b, and a dome-shaped end part 12c. Two lead-in wires 34, 36 arranged apart at an interval are sealed in the metal-cap end part 12a while being extended into the outer tube 12. A U-shaped frame 38 is substantially positioned in the outer tube 12. The U-shaped frame is composed of a glass tube 26a. A light source 16 has an arc-discharge capsule 16b positioned in the frame 38. A confinement container 18 is arranged apart from the arc-discharge capsule 16b at an interval while surrounding the arc-discharge capsule. The confinement container 18 includes a transparent structure 19. The transparent structure is mounted to the frame 38. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To avoid defects of a conventional technology and reduce cost of a metal halide arc discharge lamp. SOLUTION: The metal halide arc discharge lamp of 400W includes a lamp outer tube, an arc tube attached in the lamp outer tube, a shroud surrounding the arc tube, an electrical drop wire supplying electric energy to the arc tube, and a chemical filling in the arc tube emitting light at the time of forming of arc in the arc tube. The shroud has a predetermined thickness T and a predetermined inner diameter ID, where, T is less than 2 mm, and ID/T is smaller than 22. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To obviate disadvantages of the prior art and enhance LED bulbs. SOLUTION: The light emitting diode bulb has a base, a printed circuit board contained within the base, a plurality of electrical connectors and a light emitting diode. Each of the electrical connectors has a first end mounted upon the printed circuit board and a second end extending away from the base in a direction normal thereto. Each of the electrical connectors comprises at least a first electrically conductive plate, a contiguous insulator and a second electrically conductive plate. The light emitting diode is electrically connected between at least the first electrically conductive plate and the second electrically conductive plate adjacent the second end on each of the plurality of electrical connectors. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve the action of a lamp by avoiding the defects of conventional techniques. SOLUTION: The lamp has a base having a major axis extending in a first direction, and a lateral axis extending in a second direction right angle to the major axis. A pivot arm is mounted on the base to rotate 180° by making the lateral axis as the center, and at least one LED is mounted on the pivot arm. Electrical means is contained in the base and the pivot arm for supplying power to at least an LED. A cover is mounted on a base and rotates about by making the major axis as the center. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for reducing the loss of magnesium during the sintering of aluminum oxide articles, such as ceramic discharge vessels for lighting applications. SOLUTION: One or more aluminum oxide articles that are enriched in magnesium oxide are added to a sintering furnace to stem the loss of magnesium oxide in the remaining article. The enriched aluminum oxide article is made by soaking a porous aluminum oxide article in an aqueous solution of magnesium nitrate and heating the porous article to convert the magnesium nitrate to magnesium oxide. The enriched articles may then be added in one or several locations to the sintering furnace, where the magnesium from the enriched articles is released to suppress the magnesium loss. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a ceramic metal halide lamp for a rapid starting application which can be used for fixture for a rapid starting application and for other usages. SOLUTION: The ceramic metal halide lamp is provided with a ceramic discharge tube composed of dysprosium oxide and has a starting time of less than 50% of a lamp of the same construction and operation provided with a ceramic discharge lamp composed of polycrystalline aluminium oxide. COPYRIGHT: (C)2007,JPO&INPIT