Abstract: A piezoelectric/electrostrictive device includes a base 11 having a pair of movable parts 11a, 11b opposing each other and a connecting part 11c that connects movable parts 11a, 11b with each other at one end thereof as well as piezoelectric/electrostrictive elements 12a, 12b disposed on the side surfaces of movable parts 11a, 11b of base 11. The piezoelectric/electrostrictive device is constructed in a simple structure with fewer components. Base 11 is integrally formed in an open-box shape or in a horseshoe shape by bending one sheet of band-shaped flat plate. Movable parts 11a, 11b extend for a predetermined length from respective ends of connecting part 11c to the other ends. The other ends of movable parts 11a, 11b constitute a mounting site for mounting a component to be controlled or a component to be tested.

Abstract: Within a power generating arrangement 1 it is typically necessary to provide a coupling with an electrical power distribution cable 5. Previously this was sometimes achieved through use of brush gear and slip rings but such arrangements are subject to regular replacement for wear, maintenance and also there is a requirement to control humidity about the brush gear coupling. Alternatively, a system allowing an amount of rotation, limited by cable wind up was used. By providing a transformer in which windings 15, 16; 36, 37 are physically separated by an air gap 14, 39, but still induce voltage from variation in the magnetic flux, it is possible to create a power generating transfer transformer which can be rotated while driving electrical current for an external load.

Abstract: The invention concerns a microphone with a membrane. The membrane has a first side which is in fluid contact with the surroundings and a second side which is facing a back chamber, where a barometric relief opening or vent opening is provided between the back chamber and the surroundings. According to the invention control means are provided for controlling the barometric relief opening.

Abstract: The invention relates to a piezoactuator for miniaturized pumps, atomizers, valves or the like. The piezoactuator comprises a piezoceramic disk (1) and a pressure disk (2) coupled to the piezoceramic disk. Said pressure disk is linked on its rim (18) with a substrate (3) in a fluid-tight manner and can be deflected by the piezoceramic disk (1) while modifying the volume of a cavity (4) formed between the pressure disk (2) and the substrate (3). According to the invention, a weak point (6, 9) is provided which extends along the linked rim (18) of the pressure disk (2) and forms a joint when the pressure disk is deflected.

Abstract: An actuator device includes: a layer provided on a single crystal silicon (Si) substrate, and made of silicon dioxide (SiO2); at least one buffer layer provided on the layer made of silicon dioxide (SiO2); a base layer provided on the buffer layer, and made of lanthanum nickel oxide (LNO) having the (100) plane orientation; and a piezoelectric element. The piezoelectric element includes: a lower electrode provided on the base layer, and made of platinum (Pt) having the (100) plane orientation; a piezoelectric layer made of a ferroelectric layer whose plane orientation is the (100) orientation, the piezoelectric layer formed on the lower electrode by epitaxial growth where a crystal system of at least one kind selected from a group consisting of a tetragonal system, a monoclinic system and a rhombohedral system dominates the other crystal systems; and an upper electrode provided on the piezoelectric layer.

Abstract: A sensing device and method. The device includes a first element and a second element. Each of the elements includes a first electrode, and a second electrode, and a piezoelectric layer between and connected to the first and second electrode. The first electrode, second electrode and piezoelectric layer of each element form a pressure wave transducer. The first and second elements are oriented such that the second electrode of the first element faces the second electrode of the second element. The elements are displaced from one another such that the second electrodes form the plates of a capacitor.

Abstract: A difference in the thermal expansion coefficient between a casing and a piezoelectric body is adapted to be reduced by making an adhesive expand and contract, and this can prevent the separation of connection between the casing and the piezoelectric body and the damage of the piezoelectric body. As a result, the ultrasonic vibrator can be used over an extended period of time in an outdoor use environment.

Abstract: Vias are formed on each of a plurality of layers of transducer material prior to stacking. Using a desired electrode pattern or removal of strips, pairs of electrodes associated with each layer of transducer material are provided in a coplanar structure on each side of the layer. The smaller of the electrode structures on a given side is routed through the vias to a larger electrode structure. When the layers are stacked, the vias are used for interconnecting the electrodes between various layers. The electrical connection is provided through asperity contact.

Abstract: A piezoelectric vibration element having a favorable drive level characteristic for miniaturization, and a piezoelectric oscillator. The piezoelectric vibration element includes a base made of a piezoelectric material, a plurality of vibration arms extended from the base, a long groove formed along a longitudinal direction of a main surface of each of the plurality of vibration arms, and an exciting electrode provided inside the long groove. A center position in a width dimension of the long groove is decentered in a minus X-axis direction from a center position of an arm width dimension.

Abstract: The present invention concerns a display showcase with frames that receive and cover the ends of the slotted standards without the use of a separate slotted standard holder. The present invention further comprises frames with built in interchangeable housing design for changing items. Items in these interchangeable housings may be changed to modify, add onto or otherwise alter the appearance of the outer portions of the frames.

Abstract: The present invention relates to a locking/releasing apparatus, which comprises: a positioning mechanism disposed at a bottom plate of a fastener, a locking element, a positioning spring, a releasing spring, and a protruding pillar disposed at the bottom of a movable member, such that if the movable member is pushed into the fastener, the protruding pillar will be pushed to press against a guiding rim to rotate the locking element and drive the positioning spring to store energy, and if the protruding pillar continues to be pushed and blocked by the locking element, the protruding pillar will enter into a slot channel from a guiding gap. Then, the positioning spring releases energy to rotate the locking element in an opposite direction, and thus the protruding pillar is moved to a guiding concave to be accommodated and fixed.

Abstract: The present invention relates to a tool cabinet including an upper cover, a bottom board, a case body and a shelf accessory. The case body includes rotatably interconnected case boards, which are foldable with each other. The upper cover and the bottom board are loosely rabbeted into the case body. Without disconnecting each case board, each case board can be folded only by pulling out the pin in the upper cover, turning over the upper cover, then taking out the shelf and the upright column, releasing the block rabbeting, and folding the case boards. It is done after the shelf and the upright column are placed into a predetermined space of the right board and back board during the folding process. It is very simple and convenient. Hence, it is convenient to carry the tool cabinet after it is folded.

Abstract: A slide assembly for use with a door of a furniture piece is disclosed. The slide assembly includes a pair of cambered slides and an alignment element. The pair of slides is for slidably mounting the door. The alignment element is for aligning the movement of the pair of slides. The camber is for compensating for the weight of the door to maintain the movement of the door substantially true relative to the furniture piece. Preferably, the pair of cambered slides is universally cambered. The universal camber is for permitting one design to be used without having to be concerned about the handedness of the cambered slide assembly.

Abstract: A rail fixing structure of a drawer which houses clothing and the like. The present invention provides a rail fixing part structure easy in a mounting operation. A chest is constructed by a wooden chest body and a drawer of a synthetic resin, and a drawer body is formed into a rectangular container shape. Metal rails that slidably support the drawer at the chest body are fixed to both side portions of the body, and flanges which extend toward the drawer are provided at rail lower edge portions. A side folded part and a rear folded part which are each constituted of an outward extending surface extending toward an outside and a downward extending surface extending downward are provided at an upper edge portion of the body. Upper ribs extending downward are provided at both ends of the side folded part and the rear folded part, while lower ribs extending in a vertical direction are provided at a side surface, so that the flange of the rail can be vertically sandwiched with the upper ribs and the lower ribs.

Abstract: By repeating a purification process of a light-emitting organic compound several times, a thin film made of the light-emitting organic compound to be used in an EL display device contains ionic impurities at the concentration of 0.1 ppm or lower and has a volume resistivity in the range of 3×1010 ?cm or larger. By using such a thin film as a light-emitting layer in the EL device, a current caused by reasons other than the carrier recombination can be prevented from flowing through the thin film, and deterioration caused by unnecessary heat generation can be suppressed. Accordingly, it is possible to obtain an EL display device with high reliability.

Abstract: Disclosed herein is a plasma display panel. The plasma display panel comprises partition walls between first and second substrates to separate discharge cells from each other. Each of the partition walls comprises a non-Pb based glass powder matrix, and a non-Pb based filler having a ratio of 5˜45 wt % with respect to the glass powder matrix.

Abstract: A Field Emission Device (FED) having a ring-shaped emitter and its method of manufacture includes a ring-shaped emitter formed on a cathode exposed through an aperture of a gate electrode, has a shape corresponding to a shape of the aperture of the gate electrode, and has carbon nanotubes on edges thereof. The ring-shaped emitter is formed through an annealing process that controls the diffusion of a catalyst metal and silicon between a catalyst metal layer and a silicon layer.

Abstract: Cathode ray tube with colour selection mask comprising a frame designed to hold the mask at a distance from the screen, the said frame of a noticeably rectangular shape has a pair of short parallel sides of a noticeably L-shaped cross-section with a lateral flank extending in a direction parallel to the longitudinal axis connected to a flange noticeably perpendicular to the said longitudinal axis, the width of the flange of each short side is lower in the middle of the side than at its extremities such that the inner edge of the flange defines a curve whose concavity is oriented toward the longitudinal axis of the tube. This frame structure improves the thermal behaviour of the frame/mask assembly and reduces the weight of the materials for producing the frame while maintaining a sufficient mechanical rigidity.

Abstract: An x-ray tube assembly is provided comprising a tube casing assembly including a plurality of vertical mount posts. An insulator plate is mounted to the plurality of vertical mount posts such that the insulator plate can translate vertically on the posts. A cathode assembly is mounted to the insulator plate and generates both an eccentric moment and a vertical expansion in response to a cathode power load. A semi-compressible element is positioned between at least one of the vertical mount posts and the insulator plate. The semi-compressible element becomes incompressible at a cathode power threshold such that the vertical expansion is translated into a correction moment countering the eccentric moment.

Abstract: A sintered body containing Al2O3, TiC, and TiO2 such that 6.5 to 10 wt % of TiC and 1.0 to 2.5 wt % of TiO2 exist with respect to the total weight of Al2O3, TiC, and TiO2 is employed as a flat panel display spacer base material.

Abstract: A composition for forming a phosphor layer includes a phosphor, a binder resin, and an oxidation catalyst. The composition for forming a phosphor layer allows the lowering of a firing temperature of the phosphor layer by the catalyst activity of the oxidation catalyst and preventing deterioration of the phosphor layer or phosphor, and effectively improves the life-span and the brightness of the display device by decreasing the amount of remaining organic material.

Abstract: A plurality of arc tubes are arranged in parallel with the long side of a rectangular screen, a plurality of first electrodes and second electrodes are arranged on the display surface side of the arc tube array in the direction intersecting the longitudinal direction of the arc tubes, and a plurality of third electrodes are arranged on the back side of the arc tube array along the longitudinal direction of the arc tubes. At the time of screen display, the third electrodes are used as scan electrodes and a scan voltage is applied sequentially to the plurality of third electrodes. In the meantime, a voltage is applied to a desired first electrode or second electrode so that discharge takes place in a desired light-emitting cell and a light-emitting cell is selected. Thereafter, display discharge takes place between the adjacent first electrode and second electrode thus performing display.

Abstract: A process for reclaiming spent selenium filter mass containing an inert material, following take-up of mercury by a substance which contains selenium and is present in the filter mass. The spent mass is treated with a hydrogen peroxide solution for leaching out of the selenium content in essentially all unspent active substance present in the mass to form selenious acid. The resulting selenious acid is separated and isolated for use. The mass freed of the solution is treated with aqua regia for dissolving essentially all of the mercury selenide present in the mass. The aqua regia solution with its content of mercury and selenium are separated from the mass and isolated. Suitably, after it has been washed and dried, the mass freed of the aqua regia solution, which now only contains inert carrier material, and also the previously isolated selenious acid, are transferred to production of new selenium filter mass.

Abstract: A system and apparatus for manufacturing a low vapor pressure vapor stream lean in low volatility contaminants, and delivering same to a point of use. The system provides a transport vessel having a liquid phase or two-phase fluid held therein. The liquid and/or two-phase is transferred from said transport vessel to a vaporization vessel, wherein at least part of the liquid is vaporized. A liquid stream that is enriched in low volatility contaminants is withdrawn from the vaporization vessel, and a stream that is lean in low volatility contaminants is withdrawn from the vaporization vessel. The low vapor pressure stream is delivered to a point of use and the purity is maintained within a desired range.

Abstract: An illuminating apparatus is provided. The illuminating apparatus comprises a lower plate, an upper plate opposing to the lower plate to form a containing space therebetween, a supporting structure mounted within the containing space and connected with the lower plate and the upper plate, and a buffer material connected with at least one of the lower plate, the upper plate and the supporting structure.

Abstract: A photo-luminescent liquid crystal display (PL LCD) includes: a light control unit which includes a liquid crystal (LC) layer modulating the UV light and electrodes driving the LC layer; and a light emitting layer which emits light by the UV light transmitted through the light control unit. The light emitting layer includes inorganic phosphors and semiconductor quantum dots (QDs) having a quantum confinement effect. The PL LCD includes adding QDs having a high quantum efficiency into luminescent substances having lower light utilization efficiency than other colors, for example, red phosphor having very low quantum efficiency to improve the light utilization efficiency, thereby improving the color balance.

Abstract: An organic electroluminescent device including: at least two or more emitting layers (4), (8) between an anode (10) and a cathode (2), and an intermediate electrode layer (6) being interposed between emitting layers (4), (8), the intermediate electrode layer (6) being a single layer or a multilayer structure of a plurality of layers, at least one of the layers (6) including a semiconductive material having a resistivity of 0.001 to 10,000 ?·cm. The device and a display using the same have a high efficiency and long life time.

Abstract: A gravure plate useful in forming a light-emitting layer and/or a hole-injection layer of an organic light-emitting device has a plurality of cells in the shape of stripes, and non-cell portions between the cells. The proportion of the width b of each cell measured in the direction of printing to the width a of each cell measured in the direction perpendicular to the direction of printing, b/a, is 0.6 or more, and the proportion of the length L of each cell to the length S of each non-cell portion, L/S, is from 0.8 to 100. The length L of each cell is from 10 to 500 ?m, the length S of each non-cell portion is from 2 to 500 ?m, and the depth of the gravure plate is from 20 to 200 ?m.

Abstract: Disclosed are a fluorescent complex comprising a rare earth atom and a ligand having a structure comprising a plurality of coordinating groups bonded to each other in a ring form, and a lighting system and a flashlight device using the same. This fluorescent complex can realize high-intensity fluorescence and a prolonged service life and gives a sharp fluorescence spectrum.

Abstract: The present invention relates to a full-color organic electroluminescent display device and a method of manufacturing the same. The device comprises at least one first organic light emitting unit for generating a first color light at a vertical extension place of a first photo-resist of a color filter, and transversely provides at least one fourth organic light emitting unit at vertical extension place of a second photo-resist and third photo-resist of the color filter. A fourth color light is filtered to generate a second color light and a third color light when penetrating the second photo-resist and third photo-resist respectively, thereby mixing and collocating the first color light, second color light, and third color light, such that a full-color light emitting or display function is formed.

Abstract: A plasma display panel having sustain and scan electrodes of different widest is disclosed. Embodiments of the plasma display panel allow scan electrodes performing reset discharge, address discharge, and sustain discharge to have a width or a thickness greater than that of sustain electrodes in order to relatively reduce impedance of the scan electrodes, thereby applying equal driving pulses to the scan and sustain electrodes during the sustain discharge period, resulting in improvement of the luminous efficiency of the plasma display panel.

Abstract: A Plasma Display Panel (PDP) includes a first panel and a second panel, the first panel facing the second panel and having a plurality of discharge cells arranged between the first panel and the second panel. The first panel includes a first substrate, X and Y electrodes extending on the first substrate, and a first dielectric layer adapted to cover the X and Y electrodes and having groove shaped field concentration units arranged on a surface thereof facing the discharge cells. An inner surface of each field concentration unit is concave with respect to a central portion thereof.

Abstract: A plasma display panel is disclosed. In one embodiment, the plasma display panel includes two opposing substrates, a plurality of discharge cells formed between the substrates, and electrodes. The electrodes include address electrodes, scan electrodes, and sustain electrodes. The address electrodes extend in a first direction. The scan and sustain electrodes extend in a second direction crossing the first direction. Centers of three discharge cells associated with a single pixel together form a triangle. Two of the three discharge cells are driven by a single address electrode.

Abstract: A dynamic foil display 900 is provided wherein the spacer elements 902, 904 also serve as resistance-reducing tracks for the electrode circuitry. Resistance-reduction can thereby be provided for the row and column electrodes as well as for the foil electrode. To this end a foil display 900 comprises a light guide plate 905; a passive plate 910; and a transparent light-scattering foil 903 sandwiched between and separated from said plates by means of spacer elements 902, 904 is described. The spacer elements 902, 904 are arranged essentially along rows and columns on said plates 905, 910 and thereby define a plurality of pixel elements arranged in a matrix configuration along said rows and columns.

Abstract: A plasma display panel includes a first substrate, a second substrate that faces the first substrate, and barrier ribs that define a plurality of discharge cells in a space between the first substrate and the second substrate. Common electrodes and scanning electrodes extend parallel to each other on the first substrate, and a dielectric layer covers the common and scanning electrodes. The dielectric layer includes groove shaped field concentration units arranged closer to the common electrodes than the scanning electrodes.

Abstract: A high efficiency plasma display panel (PDP) that may be simply manufactured. The PDP includes a first substrate and a second substrate facing each other, a space between the first substrate and the second substrate is partitioned into discharge cells, a phosphor layer is formed within each discharge cell, electrodes participate in a discharge of each discharge cell, and a dielectric layer is formed on an external surface of at least one of the electrodes in a space between the first substrate and the second substrate. An alignment mark or a shaped alignment part is formed in the dielectric layer, and an alignment mark or a shaped alignment part corresponding to the alignment mark or the shaped alignment part of the dielectric layer is formed in at least one of the first substrate and the second substrate.

Abstract: An electroluminescent apparatus utilizes a replaceable electroluminescent sheet which, in operation of the apparatus, is held between two electrodes that are within a resealable housing which may be opened and closed so that a used electroluminescent sheet may be removed therefrom and replaced at the end of its usable lifetime. The housing has front and rear panels associated with the respective electrodes, at least one of the panels being transparent. The electroluminescent sheet is held between the electrodes when the housing is closed and may be removed therefrom and replaced when the housing is opened. A compression structure is provided in the housing to assure close physical contact between the electrodes and the electroluminescent sheet when the apparatus is in operation.

Abstract: Provided is a flat panel display which has improved flexibility by using a metal substrate or a conductive substrate, wherein the substrate is protected from external exposure. Also provided is a method of manufacturing the flat panel display. The flat panel display includes a substrate, a first insulator with which one surface of the substrate is covered, a display unit disposed on the other surface of the substrate, and a second insulator with which edges of the substrate are covered to prevent exposure.

Abstract: A hermetically sealed glass package and method for manufacturing the hermetically sealed glass package are described herein using an OLED display as an example. Basically, the hermetically sealed OLED display is manufactured by providing a first substrate plate and a second substrate plate and depositing a frit onto the second substrate plate. OLEDs are deposited on the first substrate plate. An irradiation source (e.g., laser, infrared light) is then used to heat the frit which melts and forms a hermetic seal that connects the first substrate plate to the second substrate plate and also protects the OLEDs. The frit is glass that was doped with at least one transition metal and possibly a CTE lowering filler such that when the irradiation source heats the frit, it softens and forms a bond. This enables the frit to melt and form the hermetic seal while avoiding thermal damage to the OLEDs.

Abstract: The present invention provides a rear plate structure for a plasma display panel. The rear plate structure includes a substrate, a plurality of parallel electrodes disposed on a surface of the substrate, a dielectric layer covering the electrodes and the surface of the substrate, a plurality of barrier ribs disposed on the dielectric layer, a reflective layer covering each side wall of the barrier ribs and the exposed dielectric layer, and a fluorescent layer covering the reflective layer.

Abstract: The invention relates to a metal halide lamp for a vehicle headlamp comprising a cylindrically-shaped discharge vessel (23) having a ceramic wall which encloses a discharge space comprising Xe and ionizable filling, and a cylindrically-shaped outer bulb (21) surrounding the discharge vessel (23). According to the invention a portion (25, 26) of the surface of the outer bulb (21) facing away from the discharge vessel (23) is shaped as a negative lens. Preferably, the portion (25, 26) encompasses a segment of the outer bulb (21) with a segment angle ? in the range between 30???60°. Preferably, the portion (25) forming the negative lens is shaped as a flat surface.

Abstract: Electromagnetic radiation sources and specific wavelength producing lamps are made from translucent to transparent doped ceramic materials or doped single crystal materials or doped glass materials used to form the lamp housing. The lamp housing contains an energy source or generator, e.g. produced by electric-arc ionization of an active ingredient, that allows for some of the light to be transmitted and some of the energy to be absorbed by and reemitted from the dopants in the transparent and absorbing-reemitting housing.

Abstract: A lamp assembly (50) employs a reflector (52) defining a light reflecting area (53), and a heat sink (54) defining a circuit housing area (55). A LED assembly (51) is disposed within the light reflecting area (53) and heat sink (54) dissipates heat away from LED assembly (51). One or more LEDs of LED assembly (51) emit a light in response to a flow of a LED current through the LEDs. One or more optical power sensors of LED assembly (51) sense an emission of the light by LED(s). A LED driver circuit (30) is disposed within the circuit housing area (55) to control the flow of the LED current through the LED(s) as a function of a sensing of the emission of the light by the optical power sensor(s) and a desired level of one or more lighting variables associated with the LED(s).

Abstract: An electrical supply device configured to deliver energy to a structure that includes at least two electrodes and a space containing a gas intended to be excited. The device includes a voltage generator, an inductor connected to the generator and connected to the structure to supply the two electrodes with a periodic voltage of given frequency, and a resonance mechanism for fixing the frequency at substantially the resonant frequency of the system of the structure and the inductor.

Abstract: A display panel comprises a plurality of arranged pixels of organic EL devices, each having a pair of electrodes and a luminescent layer containing an organic EL material and sandwiched between the electrodes. The plurality of arranged pixels include fluorescent pixels of organic EL devices formed by mainly using a fluorescent material and phosphorescent pixels of organic EL devices formed by mainly using a phosphorescent material. A display apparatus comprises a controller for controlling the display panel, including correcting the difference between the electroluminescent characteristics of the fluorescent pixels and those of the phosphorescent pixels.

Abstract: The invention relates to a DC/AC converter for supplying two gas discharge lamps, comprising a double bridge configuration of four switch elements, a third series circuit interconnecting the input terminals comprising a first capacitor and a second capacitor with substantially equal capacitance, a first and a second gas discharge lamp connected to the bridge configuration, wherein an inductor is connected in series with each of the lamps and a control circuit for controlling the switch elements and which is adapted to control the conducting periods of the switches with a duty cycle which is variable. By control of the conducting periods of the switch elements a proper control of the energy supplied to the lamps is obtained. Of course care should be taken to avoid the simultaneous closure of the first and second switch elements and of the third and fourth switch elements to avoid short circuits.

Abstract: A power source apparatus is disclosed in this invention, specifically a power source apparatus comprising a voltage amplitude control unit that employs an active power factor corrector to control the output DC voltage by applying positive or negative logic control voltage, incorporated with high frequency power source circuit and high frequency transformer, brightness of Cold Cathode Fluorescent Lamp (CCFL) or External Electrode Fluorescent Lamp (EEFL) are controllable and DC power is directly applied to DC load. Such method is accomplished by adjusting the amplitude of the supplying DC voltage for controlling the amplitude of the high frequency voltage of CCFL or EEFL, thus called Voltage Amplitude Method. Because of the characteristics of stable frequency, high resolution and linearity, VAM is broadly used in the control of luminance of discharge tubes, such as TFT-LCD TVs, LCD monitors and advertisement lamps.

Abstract: A single-chip driving device for a high intensity discharge lamp includes a high voltage direct current electric power supply system, a power control circuit, a frequency transformation circuit, and an ignition steady current circuit. The high voltage direct current electric power supply system transforms an external power supply into a relatively higher voltage direct current electric power. The power control circuit transforms the relatively higher voltage direct current electric power into a relatively lower voltage and higher frequency direct current electric power. The frequency transformation circuit transforms the relatively lower voltage and higher frequency direct current electric power into a relatively lower voltage and lower frequency direct current electric power so as to drive the ignition steady current circuit.

Abstract: The object of the present invention is to provide a current detecting circuit capable of detecting a current flowing to a switching device with high accuracy, with less power loss, with high voltage, and in an insulated form. A current detecting circuit of the present invention is provided with a charge circuit charging to a capacitor through a current which is proportional to a voltage developed in a choke coil, and a discharge circuit setting a voltage of the capacitor 0V when the current flowing to the switching device is 0, so that the voltage of the capacitor is detected as a value which is proportional to the current flowing to the switching device.

Abstract: An electronic ballast, The ballast use voltage controlling the energy storage capacitor, Furthermore, the electronic ballast continuously detects the current value and the voltage value of the HID lamp, change the pulse-width signal according to the detection result to control the HID lamp within a stable working current.