Abstract: An electron gun (10) includes an electron multiplier (22, 22′, 22″, 110) has a receiving end (50, 50′, 50″) for receiving primary electrons and an output end (54, 54′, 54″) that emits secondary electrons responsive to primary electrons arriving at the receiving end. An electron emitter (20, 20′, 20″, 102) is arranged at the receiving end of the electron multiplier for supplying primary electrons thereto. At least one of an electrical and a magnetic focusing component (14, 16) is arranged at the open output end of the electron multiplier for focusing the secondary electrons to define an electron beam. In a suitable embodiment, the electron multiplier includes a generally conical substrate (74, 90) and an electron mirror (52, 521, 522, 523, 921, 922) including a high secondary electron yield film (70) disposed on an outer surface of the conical substrate.

Abstract: In an ignition device, especially a spark plug (10), having a housing (12) that is provided with a screw-in thread (14), a permanent sticking or contact corrosion of the spark plug in the cylinder head is to be prevented. For this purpose, it is provided that the housing, at least in the region of the screw-in thread, include a coating (26) of a varnish provided with nonstick pigments.

Abstract: A method of producing a lamp is disclosed. The method provides for mounting light emitting junctions on a support structure such that the junctions adopt a three-dimensional array.

Abstract: A method for fabricating the cathode plate of a carbon nano tube field emission display uses a photoconductive paste and etchable dielectric material to fabricate the cathode plate. The method combines photolithography process and etching process to fabricate a cathode electrode layer, a dielectric layer, a gate layer, and a carbon nano tube emission layer. Packing this cathode plate structure with a conventional anode plate together can form a carbon nano tube field emission array. The distribution of the electric field is uniform and the alignment at post-process is made easy.

Abstract: A tension mask frame assembly for a color CRT includes a tension mask having an effective area having a plurality of electron beam passing holes and an ineffective area disposed at an edge portion of the effective area, a frame including support members which support opposite side portions of the tension mask so that tension is applied to the tension mask and rigid members which support end portions of the support members to maintain a gap between support members, and at least one weight member installed by a fixing unit to be separated at a predetermined interval in the ineffective area of the tension mask in a lengthwise direction of the tension mask fixed at the frame.

Abstract: An electron gun includes plural aligned charged grids each having an aperture (in a monochrome CRT) or plural apertures (in a color CRT) through which an electron beam (or beams) is directed. The beams emitted by a cathode sequentially transit a beam forming region (BFR), a dynamic focus lens and a main focus lens prior to being incident on the CRT's display screen. The electron beam tends to expand in diameter in the direction of the CRT's display screen. This results in an increase in the focusing effect on the electron beam of the electron gun's grids in proceeding from the BFR toward the display screen where the beam passing apertures in the various grids are of the same size. To increase electron beam focusing sensitivity while reducing the beam's dynamic focus voltage, the beam passing apertures in the gun's dynamic focus lens are provided with progressively reduced size in proceeding toward the electron gun's cathode.

Abstract: An electron gun used with a multi-media monitor with a low cathode voltage and improved focusing performance. The electron gun, which includes a cathode, a control electrode, a screen electrode, and a plurality of focusing electrodes to focus and accelerate an electron beam, is designed to satisfy the condition that a value of &bgr; is greater than or equal to 0.222 or a value of k is greater than or equal to 0.11, where &bgr;=T1/D, k=T1/L, T1 denotes a thickness of the control electrode, D denotes a diameter of an electron beam aperture of the control electrode, and L denotes the distance between a beam-entering surface of the control electrode and a beam-emitting surface of the screen electrode.

Abstract: An epoxy-free method for manufacturing a faceplate for a laser-CRT that produces a uniform bonding interface between the laser structure and the transparent substrate during faceplate fabrication such that efficient uniform optical output, thermal expansion coefficient matching, and better heat transfer can be achieved. The faceplate comprises a laser structure including an active gain layer and first and second mirrors on opposite sides of the active gain layer, and a transparent substrate thermal expansion matched to the laser structure and bonded to the laser structure. The laser structure and transparent substrate are bonded using diffusion bonding or sol-gel bonding to create the highly uniform bonding interface.

Abstract: A color cathode ray tube is capable of reducing a rate of cracks in a furnace and improving the productivity of the CRT by improving a structure of a seal edge of a skirt of a panel. A color cathode ray tube according to the present invention includes a rectangular panel having a substantially vertically extending skirt on inner and outer surfaces of the panel and a funnel coupled to a seal edge of the skirt of the panel. The seal edge of the skirt of the panel has a corner having a specific curvature between a seal surface and a side of the skirt, and the following relationship is satisfied: 0.6 mm<W<1.0 mm, where W is the shortest distance from a starting point on the seal surface of the corner to an extension plane of the side of the skirt.

Abstract: Disclosed is a cold cathode type fluorescent lamp operated with a low voltage while it has a greatly increased life. The cold cathode type fluorescent lamp has a fluorescent tube including a fluorescent material formed thereon. A discharge gas includes vapors of mercury and an inert gas by a ratio of approximately 1:0.6 to 1:2.0. A first base and a second base are installed at both end portions of the fluorescent tube. A first electrode is disposed in the fluorescent tube, and a second electrode is disposed in the fluorescent tube. A first electron-emitting member is fixed on the first electrode, and a second electron-emitting member is fixed on the second electrode. The cold cathode type fluorescent lamp can instantaneously operate without preheating the electrodes, and cold cathode type fluorescent lamp can have greatly increased life because the cold cathode type fluorescent lamp can continuously operate when the electron-emitting members are broken.

Abstract: A fluorescent lamp containing zinc amalgam and a method of precisely controlling the amount of mercury introduced into a temperature controlled fluorescent lamp. Precise quantities of mercury may be introduced into a fluorescent lamp in the form of solid zinc amalgam pellets that are in a metastable, non-equilibrium state.

Abstract: An apparatus and method which enhances the electron emission efficiency in a field emission apparatus having carbon nanotube(s) in a cathode as an electron emitting material. In a field emission apparatus having carbonanotube(s) as an electron emitting material on a cathode 2, the electron emission efficiency from the carbon nanotube(s) 1 is enhanced by irradiating carbon nanotubes 1 with infrared light.

Abstract: A display device of the present invention reduces the occurrence of cracks and breaking of plate-like control electrodes, enhances the operability of assembling and suppresses the reduction of a yield factor of products. The display device includes a back substrate which has a plurality of cathode lines which extend in one direction, are arranged in parallel in another direction which crosses one direction and include electron sources respectively, and a plurality of control electrodes which cross the cathode lines in a non-contact manner within a display region, extend in another direction and are arranged in parallel in one direction on an inner surface thereof, and a front substrate which has anodes and phosphors on an inner surface thereof and faces the back substrate with a given distance therebetween. The control electrodes are formed of plate-like control electrodes.

Abstract: A substrate 121 has a reflecting layer 122 formed thereon, the reflecting layer 122 having a mirror surface on the substrate 121 side. When light is emitted from light transmitting regions 120T, a display mode is achieved in which a desired display mode is performed according to the state of the voltage applied to a liquid crystal 130. Also, when the voltage applied to the liquid crystal 130 is less than the threshold value, and a backlight 140 is turned off to substantially cut off light transmitted through all light-transmitting regions 120T, a mirror mode is set in which the entire surface is seen as a mirror surface by the mirror surface of the reflecting layer 122. Therefore, the display screen of the electro-optical device 100 can be used as a mirror.

Abstract: The present invention is a active-driving organic EL light emission device comprising an organic EL element comprising an organic luminous medium between an upper electrode and a lower electrode, and a thin film transistor for driving this organic EL element, wherein light emitted from the organic EL element is taken out from the side of the upper electrode, and the upper electrode comprises a main electrode formed of transparent conductive material, and an auxiliary electrode formed of a low-resistance material. According to the active-driving organic EL light emission device of this structure, the numerical aperture can be made large. Additionally, the sheet resistivity of the upper electrode can be made low even if luminescence is taken out from the side of the upper electrode. Thus, it is possible to provide an active-driving organic EL light emission device making it possible to display images having a high brightness and a homogenous brightness; and a method for manufacturing the same.

Abstract: An organic light-emitting device, comprising: a substrate; a first conductive layer formed over the substrate; at least one layer of a light-emissive organic material formed over the first conductive layer; a barrier layer formed over the at least one organic layer which acts to protect the at least one layer of organic material; and a second conductive layer, preferably a patterned sputtered layer, formed over the barrier layer.

Abstract: A light emitting element suitable for a blue light lamp in a signal light apparatus is provided. The group III nitride compound semiconductor light emitting element includes a first light emitting layer for emitting a first light having a blue light and a second light emitting layer for emitting a second light having a green light. The first light and the second light are combined to provide a third light having a blue-green light synthesized from the first light and the second light.

Abstract: An organic electroluminescence (EL) display unit includes a plurality of pixels formed on a glass substrate and each including a TFT area and a luminescence area. An edge cover film covers the TFT area and exposes the luminescence area through a window formed in the edge cover film. The edge of the edge cover film adjacent to the window has a taper angle equal to or smaller than 30 degrees. This taper angle is obtained by a post-baking treatment in addition to a step alleviating film formed in the luminescence area to underlie the organic EL element.

Abstract: Provided is an organic electroluminescence device which operates at a low voltage, has a uniform light emission surface, and can display high-quality images. In an organic electroluminescence device, an anode, a hole transport layer made of an organic compound, a light emitting layer made of an organic compound, and a cathode are stacked in the order named, and an electron injection layer containing a lanthanoid oxide is formed between the light emitting layer and cathode. The anode and/or cathode is made of a transparent conductive material. In another organic electroluminescence device, an anode, a hole transport layer made of an organic compound, a light emitting layer made of an organic compound, and a cathode are stacked in the order named, and an electron injection layer formed by mixing a lanthanoid metal oxide and organic compound is formed between the light emitting layer and cathode.

Abstract: To provide a bright and highly reliable light-emitting device. An anode (102), an EL layer (103), a cathode (104), and an auxiliary electrode (105) are formed sequentially in lamination on a reflecting electrode (101). Further, the anode (102), the cathode (104), and the auxiliary electrode (105) are either transparent or semi-transparent with respect to visible radiation. In such a structure, lights generated in the EL layer (103) are almost all irradiated to the side of the cathode (104), whereby an effect light emitting area of a pixel is drastically enhanced.

Abstract: Disclosed is a light emitting diode capable of accomplishing enlargement of emitted range of light and equalization of brightness of emitted light.

Abstract: The composition for a black matrix, which does not include a mineral binding and/or sintering agent, preferably contains a pigment chosen from: i) an iron chromium aluminium mixed oxide, ii) an iron chromium nickel cobalt mixed oxide and iii) an iron chromium cobalt aluminium mixed oxide or a mixture of iron, chromium, cobalt and aluminium oxides. The invention also relates to a plasma display panel comprising a first tile (2) and a second tile (4) facing each other, enclosing a discharge space, and an array of discharge cells at the intersection of electrodes covered with a dielectric layer (6, 8, 12, 14), at least one of the tiles having a black matrix (30) embedded beneath a dielectric layer (6), the black matrix (30) consisting of an opaque material, at least part of which is incorporated into the said dielectric layer (6).

Abstract: A plasma display device includes a first substrate, an address electrode formed on an upper surface of the fist substrate, a first dielectric layer formed on the upper surface of the first substrate and embedding the address electrode, a second substrate which is transparent and forms a discharge space by being coupled to the first substrate, a plurality of maintaining electrodes formed on a lower surface of the second substrate to form a predetermined angle with the address electrode, each of the maintaining electrodes including first and second electrodes, a second dielectric layer formed on the second substrate where the maintaining electrodes are formed and embedding the maintaining electrodes, at least a portion where an electrical field is concentrated formed between the first and second electrodes constituting the maintaining electrodes, and a partition installed between the first and second substrates for sectioning the discharge space.

Abstract: A short arc discharge lamp in which the arc tube contains opposed cathode and anode electrodes with upholding parts that are inserted into a respective glass tube holding cylinder, and in which the glass tubes of the holding cylinders are secured in the side tubes at opposite sides of the arc tube by contracted areas, provides the peripheral surface of the holding cylinders with at least one section of reduced diameter to prevent the holding cylinders from moving, to prevent force from acting in a concentrated manner on the sealed areas and to prevent the lamp from being damaged when the lamp is shaken during transport or the like.

Abstract: The present invention relates to a plate, more particularly for plasma display panels, comprising a substrate 10 on which at least one electrode 21, made of a conducting material consisting of an aluminium-based and/or zinc-based metal alloy having a melting point above 700° C., is produced; the electrode is intended to be covered with a dielectric layer.

Abstract: A slow wave circuit 10, 110) of a traveling wave tube includes a three-dimensional conductive structure 30, 130). A dielectric film 36, 136) coats selected portions of the three-dimensional conductive structure 30, 130). An outer housing 12, 14, 112, 114) surrounds the three-dimensional conductive structure 30, 130) . The outer housing 12, 14, 112, 114) includes interior surfaces that connect with the dielectric film 36, 136). In a method for generating or amplifying microwave energy, a three-dimensional conductive structure is laser micromachined to define a selected generally periodic pattern thereon. The conductive structure is arranged inside a generally hollow barrel. An electron beam passes through the generally hollow three-dimensional structure and interacts with the conductive structure and the generally hollow barrel to generate or amplify the microwave energy.

Abstract: A method is applied for operating a cold cathode having at least one electron emission portion and a control electrode for controlling an emission of electrons, in which an electron beam is extracted out of the cold cathode by applying operating voltages to the electron emission portion and the control electrode, respectively. At least one auxiliary electron emission portion is provided other than the electron emission portion positioned at an operating position for emitting electrons. In order to replace the electron emission portion to be operated, the electron emission portions are moved so that the auxiliary electron emission portion is positioned at the operating position.

Abstract: A lighting fixture and a method of fabricating the same are shown and described herein in one particular embodiment, a light fixture comprises a plurality of vanes projecting radially outward from a central core, and a series of lights coupled to the fixture. The vanes can each be semi-circular, and can each be identical in size, such that the fixture as a whole is generally spherical. In addition, a method of fabricating a light fixture by bending an elongated structure alternatingly in opposite directions to form such a plurality of vanes is shown and described.

Abstract: A load drive (1) having a pulse converter (2) and a DC/DC converter (5). The pulse converter (2) is capable of converting a high DC voltage supplied from the power supply unit (10) of a vehicle to a pulse voltage and applies the pulse voltage to a first lamp (L1). The DC/DC converter (5) operates to convert the high DC voltage to a low DC voltage whose voltage value is lower than the voltage value of the high DC voltage and applies the low DC voltage to a second lamp (L2).

Abstract: A vehicle headlamp includes a reflector, a discharge bulb, a lighting circuit for supplying electric power to the discharge bulb, a socket coupled to the discharge bulb to connect the discharge bulb to the lighting circuit, an opening portion formed in a portion of a lamp body disposed rearwardly of the discharge bulb, and a cover for covering the opening portion. A power source-side connector and a bulb-side connector are fixedly secured to a portion of the lamp body disposed in the vicinity of the opening portion. The lighting circuit and an output connector for connection to the bulb-side connector are integrally formed on the cover. When the cover is moved to open the opening portion, the connection between the power source-side connector and the input connector and the connection between the bulb-side connector and the output connector are simultaneously interrupted.

Abstract: The present invention includes a system and method for confining plasma within a plasma processing chamber. The plasma processing apparatus comprises a first electrode, a power generator, a second electrode, at least one confinement ring, and a ground extension surrounding the first electrode. The first electrode is configured to receive a workpiece and has an associated first electrode area. The power generator is operatively coupled to the first electrode, and the power generator is configured to generate RF power that is communicated to the first electrode. The second electrode is disposed at a distance from the first electrode. The second electrode is configured to provide a complete electrical circuit for RF power communicated from the first electrode. Additionally, the second electrode has a second electrode area that is greater than the first electrode area. At least one confinement ring is configured to assist confine the plasma.

Abstract: This application discloses the technique of the RF plasma processing using two RF waves of different frequencies, where plasma is generate and retained sufficiently and stably. The first frequency is for generating plasma by igniting a discharge, and the second frequency is for generating self-biasing voltage at a substrate to be processed. The wave of the second frequency is applied with a time-lag after applying the RF wave of the first frequency. This application also discloses the impedance matching technique in the RF plasma processing, where impedance to be provided is optimized both for igniting the discharge and for stabilizing the plasma.

Abstract: A method for driving a plasma display panel is provided that can improve luminance and light emission efficiency of display discharge. After addressing for forming wall charge in cells to be lighted, in order to generate display discharge and following reproduction of wall charge in the cell, potential of at least one display electrode is altered so as to differ between start time point and end time point of display discharge, and potential of at least one electrode except the display electrode is altered so as to differ between the start time point and the end time point of the display discharge.

Abstract: A drive current having a peak current, for driving an organic EL display panel, is generated by generating the peak current in output side transistors of a current mirror circuit having a plurality of input side transistors by driving one of the input side transistors with a predetermined current and reducing an output current of the output side transistors from the peak current to a steady current by reducing the drive current per one input side transistor by branching the predetermined current to the other input side transistors connected in parallel to the one input side transistor.

Abstract: The invention relates to a rod-core transformer for use as a starting transformer in the cap of a high-pressure discharge lamp for a motor vehicle headlight. According to the invention, the rod-core transformer has at least two cores (2, 3) which are in the form of rods and are arranged alongside one another, and on each of which a multilayer secondary winding (4, 5) is wound, with the respective layers (4a, 4b, 4c, 4d) and (5a, 5b, 5c, 5d) being connected in parallel and being arranged one above the other without any offset. Furthermore the secondary windings (4, 5) are electrically conductively connected to one another, with their total resistance being at most 2 &OHgr;. The transformer according to the invention is particularly highly suitable for use as a starting transformer for high-pressure discharge lamps with a low operating voltage, for example halogen metal-vapour high-pressure discharge lamps which do not contain mercury.

Abstract: A curing light system useful for curing light activated composite materials is disclosed. Various configurations of light emitting semiconductor chips and heat sinks are disclosed, as well as various structures and methods for driving, controlling and using them.

Abstract: During stationary operation a circuit arrangement for operating a high-pressure discharge lamp supplies a direct current to the lamp which is commutated at a low-frequency. During take-over, between ignition and stationary operation, a high frequency current is supplied to the lamp after each commutation during a time interval that is shorter than half a cycle of the commutation. By supplying the lamp in this way, it forms a smaller load during take-over, so that the requirements that the circuit arrangement has to meet are less severe.

Abstract: The invention relates to a novel operating circuit for a low-pressure gas discharge lamp 1 in the case of which a digital controller 12 is designed such that by gradually lowering the operating frequency in the ignition procedure it initiates shutdown operations of a safety shutdown device for excessive currents through a lamp inductor 10 in order thereafter to increase the operating frequency somewhat. It is possible overall in this way to achieve an ignition, for example by repeated pulsed ignition operations as far as shutdown operations, or else by a continuous ignition operation at a minimum frequency at which no shutdown operation occurs. The invention has the advantage of being insensitive to temperature fluctuations and component tolerances and, moreover, of permitting the lamp inductor 10 to have comparatively small dimensions.

Abstract: The robot arm is composed of two parallel branches (2, 3) formed from a reduced number of segments (5, 6, 7) and connected to each other by a wrist (5) through a wrist holder (8), the directions of which are kept approximately constant by transmissions (12 to 16). The working space of this control arm is large and it is free of any kinetic singularities except at the end positions, and good decoupling of translation and rotation movements is achieved.

Abstract: An apparatus for controlling deceleration of a DC motor which is driven in a forward operating direction with a forward-drive electric current applied thereto by a forward driving device, wherein the forward motor driving device applies the forward-drive electric current in the form of pulses to the DC motor during its deceleration, and wherein a plugging-braking device operable while the motor is subjected to a regenerative brake or operated in a non-braked state is operated to apply a reverse-drive electric current in the form of pulses to the motor, to apply a plugging brake to the motor, such that at least one pulse of the reverse-drive electric current follows every predetermined number of pulses of the forward-drive electric current.

Abstract: An apparatus provides protection to an electric traction motor of a vehicle. The vehicle has a first powertrain and a second powertrain. The first powertrain includes an engine and it is coupled with a first set of road wheels. The second powertrain includes the electric traction motor and it is coupled with a second set of road wheels. The apparatus comprises a revolution speed sensor operatively associated with the electric traction motor. The apparatus also comprises at least one controller. The controller includes control logic for modifying operation of the vehicle in response to monitoring the revolution speed sensor to restrain the vehicle speed from increasing in such a manner as to limit revolution speed of the electric traction motor to revolution speed values below an allowable upper revolution speed limit.

Abstract: An anti-pitch assembly is used in combination with a closure device of a motor vehicle. The closure device includes a closure panel, i.e., a windowpane or door, and a motor for moving the closure panel between an open position and a closed position. In the closed position, the closure panel covers an aperture, i.e., a window or door opening, of the motor vehicle. The anti-pinch assembly includes a position sensor that is disposed adjacent the motor or the closure device. The position sensor generates a position signal indicative of the position of the closure panel. A capacitive sensor measures the capacitance of a field extending through the aperture. The capacitive sensor generates a signal therefrom. A controller is electrically connected to the position and capacitive sensors.

Abstract: A region judging circuit judges an electric angle region of a three-phase brushless DC motor based on an output signal of a resolver. A latch timing output circuit determines an optimum latch timing. A driving direction judging circuit judges a rotational direction of the motor based on a comparison in largeness between a pair of phase currents. A latch circuit latches a judgement result of the driving direction judging circuit at the latch timing designated by the latch timing output circuit and retains the judgement result until the next latch timing comes.

Abstract: The present invention resides in a capacitor-start, single-phase induction motor wherein connections for all coil windings are used during start-up and running of the motor. The induction motor during start-up is connected as a 2 pole motor and is switched to connect as a 4 pole motor when the capacitor drops out of the motor circuit. A cylindrical air gap motor with radial coils in a wound stator makes the pole change easily possible. The use of radial coils provides a design with a minimum of copper wire. This particular induction motor will reduce the use of copper wire in the wound coils by approximately 50%.

Abstract: A method and system for estimating slip gain for use in the control of torque in a multi-phase induction machine. The slip gain estimate is based on a transient response of the induction machine to torque command changes. The invention is independent of machine parameters other than the slip gain. The method uses a slip gain estimation algorithm that is suited for use either as a self-calibration procedure or a background procedure that continually updates the slip gain during normal operation of the induction machine. The estimation method of the invention is suited for automotive driveline applications, which typically have limited sensor capability and which may present tuning problems associated with high volume production and with slip gain estimates when temperature changes during normal operation.

Abstract: The invention relates to an electrical power supply system for an automobile vehicle comprising an alternator, a first battery with a voltage less than the electromotive force of the alternator, and a second battery with a higher voltage. The first battery is charged while the inductance internal to the alternator is being charged and the second battery is charged while this internal inductance is being discharged. This system comprises for each alternator phase, a controlled switch in series with the first battery, and a diode to charge the second battery, and control means for each controlled switch such that the first battery is charged when this controlled switch is closed, and when the controlled switch is opened after the inductance has been charged, the inductance discharges into the second battery.

Abstract: An energy management system for use with a hybrid energy off highway vehicle. The off highway vehicle includes a primary energy source and a power converter driven by the primary energy source for providing primary electric power. A traction bus is coupled to the power converter and carries the primary electric power. A traction drive is connected to the traction bus. The traction drive has a motoring mode in which the traction drive is responsive to the primary electric power for propelling the off highway vehicle. The traction drive has a dynamic braking mode of operation wherein said traction drive generates dynamic braking electrical energy. The energy management system includes an energy management processor for determining a power storage parameter and a power transfer parameter. An energy storage system is connected to the traction bus and is responsive to the energy management processor.

Abstract: A battery module comprises a flat cell including a laminate film; an electric power generating element; lead terminals; a cell outer case junction part formed by partially or completely covering the electric power generating element with the laminate film, and by sealing the laminate film by thermal fusion; a cell assembly formed by collecting a plurality of the flat cells; and a pair of planar supports for interposing the cell assembly. Further, the battery module comprises rib-shaped protrusions respectively including electrical conductors for electrically connecting the lead terminals of the flat cells, the rib-shaped protrusions being held on the planar support at predetermined intervals, and the planar supports pressing and supporting the cell assembly.

Abstract: Electrical power source apparatuses, circuits, electrochemical device charging methods, and methods of charging a plurality of electrochemical devices are provided. According to one aspect, an electrical power source apparatus includes a plurality of charging nodes, a plurality of electrochemical devices individually coupled with a respective one of the charging nodes and individually configured to assume an open-circuit condition in a substantially charged state and a plurality of shunting devices coupled with respective ones of the charging nodes and individually configured to shunt electrical energy from a respective one of the charging nodes after the respective electrochemical device assumes the open-circuit condition.

Abstract: A battery capacity recovery apparatus and method thereof periodically conducts discharge and recharge operations for a battery used in a wireless telephone to prevent a memory effect on the battery. The battery capacity recovery apparatus includes a control unit for controlling the system of the wireless telephone, and a voltage detecting unit for measuring a voltage condition of the battery, and outputting a signal indicative of the measured voltage condition to the control unit. A recharge detecting unit is connected to a constant voltage unit and is included in a recharge device. The recharge detecting unit detects whether or not a handset unit of the telecommunication device is connected to the recharge device, and a recovery path establishing unit is adapted to establish a path for recovering the capacity of the battery under a control of the control unit.