Patents Issued in January 15, 2004
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Publication number: 20040007954Abstract: The present invention realizes a cathode ray tube which holds the stable electron emission characteristics when the cathode ray tube is operated in a high current density state for a long time. An electron emissive material layer which constitutes a cathode is formed by dispersing a scandium compound having an average particle size of equal to or less than 1.2 &mgr;m to an oxide layer formed of alkaline earth metal (barium, strontium, calcium) oxide, wherein an atomic weight ratio of scandium with respect to strontium is set to a value within a range of 0.003 to 0.3. A base metal includes a reducing metal containing nickel as a main component and a plate thickness of a surface of a top portion of the base metal which comes into contact with the electron emissive layer is set to a value equal to or more than 0.17 mm.Type: ApplicationFiled: June 9, 2003Publication date: January 15, 2004Inventors: Sachio Koizumi, Toshifumi Komiya, Norio Iwamura
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Publication number: 20040007955Abstract: A field emission device includes a substrate in which a well has been formed. Carbon fibers with a high aspect ratio are deposited within the well, wherein the well is sufficiently deep so that axes of a large number of the carbon fibers are substantially coaxial with a long axis of the well. A conductive anode is positioned relative to the substrate so that an electric potential applied between the conductive anode and the substrate causes an emission of electrons from the carbon fibers towards the conductive anode.Type: ApplicationFiled: July 9, 2002Publication date: January 15, 2004Inventors: Zvi Yaniv, Richard Lee Fink
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Publication number: 20040007956Abstract: A field emission display device (1) includes a cathode plate (20), an electrically resistive buffer (30) made from carbon formed on the cathode plate, electron emitters (40) made from carbon formed on the buffer, and an anode plate (50) spaced from the electron emitters thereby defining an interspace region therebetween. Each electron emitter includes a nano-rod. The combined buffer and electron emitters has a gradient distribution of electrical resistivity such that highest electrical resistivity is nearest the cathode plate and lowest electrical resistivity is nearest the anode plate. When emitting voltage is applied between the cathode and anode plates, electrons emitted from the electron emitters traverse the interspace region and are received by the anode plate. Because of the gradient distribution of electrical resistivity, only a very low emitting voltage needs to be applied. Other embodiments include single walled and multi-walled nanotubes (40′, 40″).Type: ApplicationFiled: July 11, 2002Publication date: January 15, 2004Inventor: Ga-Lane Chen
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Publication number: 20040007957Abstract: The present invention provides A color cathode ray tube comprising: a panel having a flat outer surface and an inner surface that has a predetermined curvature; and a shadow mask, wherein 1 B2 P2 ≤ B3 P3Type: ApplicationFiled: March 13, 2003Publication date: January 15, 2004Inventors: Jin Tae Park, Je Yun Bae
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Publication number: 20040007958Abstract: A deflection yoke mounted on a rear portion of a cathode ray tube (CRT) to deflect an electron beam emitted from an electron gun of the CRT includes a coil separator mounted on the CRT, a horizontal deflection coil mounted on an inside of the coil separator, having a first section generating a horizontal deflection magnetic field deflecting the electron in a horizontal direction and having a first radius, having a second section generating a magnetic field to weaken the horizontal deflection magnetic field and having a second radius different from the first radius, a vertical deflection coil mounted on an outside of the coil separator and generating a vertical deflection magnetic field deflecting the electron beam in a vertical direction, and a ferrite core covering a portion of the vertical deflection coil to strengthen the horizontal deflection magnetic field and the vertical deflection magnetic field.Type: ApplicationFiled: December 13, 2002Publication date: January 15, 2004Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Chang Ju Lim, Jae Jung Kim, Hwan Seok Choe
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Publication number: 20040007959Abstract: Axially symmetric magnetic fields are provided about the longitudinal axis of each beam of a multi-beam electron beam device. The magnetic field symmetry is independent of beam voltage, beam current and applied magnetic field strength. A flux equalizer assembly is disposed between the cathodes and the anodes and near the cathodes of a multi-beam electron beam device. The assembly includes a ferromagnetic flux plate completely contained within the magnetic focusing circuit of the device. The flux plate includes apertures for each beam of the multi-beam device. A flux equalization gap or gaps are disposed in the flux plate to provide a perturbation in the magnetic field in the flux plate which counters the asymmetry induced by the off-axis position of the beam. The gaps may be implemented in a number of ways all of which have the effect of producing a locally continuously varying reluctance that locally counters the magnetic field asymmetry.Type: ApplicationFiled: July 9, 2002Publication date: January 15, 2004Applicant: Communications and Power Industries, Inc., a Delaware CorporationInventors: Mark J. Cattelino, Fred I. Friedlander
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Publication number: 20040007960Abstract: The present invention relates to a field-emission display having a faceplate formed with a phosphor layer and means irradiating an electron beam onto the phosphor layer in order to improve the characteristic of life of the device. The feature of the present invention is in the structure of a phosphor layer. The phosphor layer is expressed by a general formula: ZnS: M, Al where M is an activator of at least one of Cu, Ag and Au; and Al is a coactivator, in which the concentration of Al is higher than that of M. According to the present invention, the electrification characteristic of the phosphor is improved for lower resistance. The defect concentration of the surface of the phosphor is reduced. The filed-emission display which can realize improvement in the characteristic of life which has not been solved in the prior art can be made.Type: ApplicationFiled: January 21, 2003Publication date: January 15, 2004Applicant: Hitachi, Ltd.Inventors: Masaaki Komatsu, Masatoshi Shiiki, Ryo Inoue
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Publication number: 20040007961Abstract: There is provided white light illumination system including a radiation source, a first luminescent material having a peak emission wavelength of about 575 to about 620 nm, a second luminescent material having a peak emission wavelength of about 495 to about 550 nm, which is different from the first luminescent material and a third luminescent material having a peak emission wavelength of about 420 to about 480 nm, which is different from the first and second luminescent materials. The LED may be a UV LED and the luminescent materials may be a blend of three or four phosphors. The first phosphor may be an orange emitting Eu2+, Mn2+ activated strontium pyrophosphate, Sr2P2O7:Eu2+, Mn2+. The second phosphor may be a blue-green emitting Eu2+ activated barium silicate, (Ba,Sr,Ca)2SiO4:Eu2+. The third phosphor may be a blue emitting SECA phosphor, (Sr,Ba,Ca)5(PO4)3Cl:Eu2+. Optionally, the fourth phosphor may be a red emitting Mn4+ activated magnesium fluorogermanate, 3.Type: ApplicationFiled: July 11, 2003Publication date: January 15, 2004Applicant: General Electric CompanyInventors: Alok Mani Srivastava, Holly Ann Comanzo, Thomas Francis McNulty
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Publication number: 20040007962Abstract: A field emission display device (1) includes a cathode plate (20), a resistive buffer (30) in contact with the cathode plate, a plurality of electron emitters (40) formed on the buffer and an anode plate (50) spaced from the buffer. Each electron emitter includes a rod-shaped first part (401) and a conical second part (402). The buffer and first parts are made from silicon oxide (SiOx). The combined buffer and first parts has a gradient distribution of electrical resistivity such that highest electrical resistivity is nearest the cathode plate and lowest electrical resistivity is nearest the anode plate. The second parts are made from molybdenum. When emitting voltage is applied between the cathode and anode plates, electrons emitted from the second parts traverse an interspace region and are received by the anode plate. Because of the gradient distribution of electrical resistivity, only a very low emitting voltage is needed.Type: ApplicationFiled: July 11, 2002Publication date: January 15, 2004Inventor: Ga-Lane Chen
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Publication number: 20040007963Abstract: A field emission display device (1) includes a cathode plate (20), a resistive buffer (30) in contact with the cathode plate, a plurality of electron emitters (40) formed on the buffer, and an anode plate (50) spaced from the electron emitters. Each electron emitter includes a rod-shaped first part (401) and a conical second part (402). The buffer and first parts are made from silicon nitride. The combined buffer and first parts has a gradient distribution of electrical resistivity such that highest electrical resistivity is nearest the cathode plate and lowest electrical resistivity is nearest the anode plate. The second parts are made from niobium. When emitting voltage is applied between the cathode and anode plates, electrons emitted from the electron emitters traverse an interspace region and are received by the anode plate. Because of the gradient distribution of electrical resistivity, only a very low emitting voltage is needed.Type: ApplicationFiled: July 12, 2002Publication date: January 15, 2004Inventor: Ga-Lane Chen
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Publication number: 20040007964Abstract: A field emission display device (1) includes a cathode plate (20), a resistive buffer (30) in contact with the cathode plate, a plurality of electron emitters (40) formed on the buffer, and an anode plate (50) spaced from the electron emitters. Each electron emitter includes a nano-rod first part (401) and a conical second part (402). The buffer and the nano-rods are made from silicon carbide (SiCX). The combined buffer and nano-rods has a gradient distribution of electrical resistivity such that highest electrical resistivity is nearest the cathode plate and lowest electrical resistivity is nearest-the anode plate. The conical parts are made from molybdenum. When emitting voltage is applied between the cathode and anode plates, electrons emitted from the electron emitters traverse the interspace region and are received by the anode plate. Because of the gradient distribution of electrical resistivity, only a very low emitting voltage is needed.Type: ApplicationFiled: July 12, 2002Publication date: January 15, 2004Inventor: Ga-Lane Chen
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Publication number: 20040007965Abstract: To ensure sufficient electron source regions on cathode lines formed on a back substrate, cathode lines are divided into line portions and cathode portions, wherein the line portions are made narrow to a width which is a required minimum for transmitting signals and an area of the cathode portions which form an electron source is formed in a wide island shape.Type: ApplicationFiled: July 2, 2003Publication date: January 15, 2004Inventors: Yuuichi Kijima, Yoshiyuki Kaneko, Shigemi Hirasawa, Susumu Sasaki, Tomoki Nakamura
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Publication number: 20040007966Abstract: A field emission display device (1) includes a cathode plate (20), a resistive buffer (30) in contact with the cathode plate, a plurality of electron emitters (40) formed on the buffer and an anode plate (50) spaced from the buffer. Each electron emitter includes a rod-shaped first part (401) and a conical second part (402). The buffer and first parts are made from silicon nitride (SiNx). The combined buffer and first parts has a gradient distribution of electrical resistivity such that highest electrical resistivity is nearest the cathode plate and lowest electrical resistivity is nearest the anode plate. The second parts are made from molybdenum. When emitting voltage is applied between the cathode and anode plates, electrons emitted from the second parts traverse an interspace region and are received by the anode plate. Because of the gradient distribution of electrical resistivity, only a very low emitting voltage is needed.Type: ApplicationFiled: July 12, 2002Publication date: January 15, 2004Inventor: Ga-Lane Chen
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Publication number: 20040007967Abstract: A field emission display device (1) includes a cathode plate (20), a resistive buffer (30) in contact with the cathode plate, a plurality of electron emitters (40) formed on the buffer, and an anode plate (50) spaced from the electron emitters. Each electron emitter includes a rod-shaped first part (401) and a conical second part (402). The buffer and first parts are made from silicon carbide. The combined buffer and first parts has a gradient distribution of electrical resistivity such that highest electrical resistivity is nearest the cathode plate and lowest electrical resistivity is nearest the anode plate. The second parts are made from niobium. When emitting voltage is applied between the cathode and anode plates, electrons emitted from the electron emitters traverse an interspace region and are received by the anode plate. Because of the gradient distribution of electrical resistivity, only a very low emitting voltage is needed.Type: ApplicationFiled: July 12, 2002Publication date: January 15, 2004Inventor: Ga-Lane Chen
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Publication number: 20040007968Abstract: A lighted switch sheet of the invention has a structure, which comprises a sheet having a plurality of movable contacts of a hemispherical shape disposed in a plurality of fixing holes, and an EL element affixed on an upper surface of the sheet. The EL element has an optically transmitting substrate provided with an optically transmitting electrode layer, light-emitting layer and back electrode layer formed in an overlapping manner on an underside surface thereof, and through holes of a size slightly smaller than an outer diameter of the movable contacts formed above their respective movable contacts. The invention provides for the lighted switch sheet with a small number of structural components and a simple structure at low cost.Type: ApplicationFiled: June 5, 2003Publication date: January 15, 2004Inventors: Tetsuro Hanahara, Takayuki Ishikawa, Yoshiharu Abe
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Publication number: 20040007969Abstract: A device is provided. The device includes a substrate, a first electrode disposed over the substrate, a small molecule organic emissive layer disposed over the first electrode, and a second electrode disposed over the organic emissive layer. The substrate has a first index of refraction, and the organic emissive layer has a second index of refraction. The first index of refraction is higher than the second index of refraction. The device may have an external electroluminescent efficiency of at least about 56%. Bulky substituents or dopants may be used to decrease the index of refraction and/or the density of the organic emissive layer.Type: ApplicationFiled: November 27, 2002Publication date: January 15, 2004Inventors: Min-Hao Michael Lu, James C. Sturm, Conor Francis Madigan, Raymond Kwong
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Publication number: 20040007970Abstract: Organic light emitting devices are disclosed that use a micro electromechanical system (MEMS) structure to enable a pixel and pixel array wherein each pixel contains a MEMS and an OLED element. A MEMS structure is used for switching the OLED element. These OLED/MEMS pixels can be fabricated on flex circuit, silicon, as well as other inorganic materials. They can be fabricated in a large array for developing a 2-dimensional display application and each pixel can be addressed through conventional matrix scanning addressing scheme. The ability of fabricating these OLED/MEMS pixels on flexible organic substrates as well as other rigid substrates enables wider selection of substrate materials for use with different applications.Type: ApplicationFiled: May 28, 2003Publication date: January 15, 2004Inventors: Kelvin Ma, Ji-Ung Lee, Anil Raj Duggal
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Publication number: 20040007971Abstract: The invention is an organic electroluminescent device that comprises organic compound layer(s) including at least one organic emitting layer sandwiched between a pair of electrodes, wherein at least one organic compound layer is formed from an organic compound material having an impurity concentration of lower than 1000 ppm. The device has the advantages of applicability to lightweight, thin and low-voltage driving displays, good luminescent capacity attenuating little even in long-term driving operation, and good durability.Type: ApplicationFiled: July 3, 2003Publication date: January 15, 2004Applicant: Idemitsu Kosan Co., Ltd.Inventors: Hisahiro Higashi, Toshio Sakai, Chishio Hosokawa
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Publication number: 20040007972Abstract: An electro-luminescent device including a first facial material and a first electrode assembly arranged on the first facial material. The first electrode assembly includes at least two pattern electrode layers overlapping each other. The two pattern electrode layers are insulated from each other by an insulating layer. A lighting layer is overlaid on the other face of the first electrode assembly. A second electrode assembly is arranged on the other face of the lighting layer. The second electrode assembly includes at least one sub-electrode layer. A second facial material is overlaid on the other face of the second electrode assembly. The pattern electrode layers and the sub-electrode layer are respectively connected with a drive circuit. The pattern electrode layers respectively have multiple conductive patterns. An A.C.Type: ApplicationFiled: July 10, 2002Publication date: January 15, 2004Inventor: Chih-Yuan Wang
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Publication number: 20040007973Abstract: A color display improves the contrast of a shown image without decreasing an open area ratio. A color electroluminescent display of the present invention has electroluminescent elements provided on a black insulation layer. A predetermined space exists between each adjacent pair of the electroluminescent elements. Filter elements are provided on the electroluminescent elements. The interface between each adjacent pair of the filter elements extends along the thickness direction of the color electroluminescent display and is aligned with one of the spaces.Type: ApplicationFiled: July 9, 2003Publication date: January 15, 2004Inventor: Tetsuya Utsumi
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Publication number: 20040007974Abstract: A method of manufacturing an organic electroluminescent display element includes the steps of forming a plurality of organic electroluminescent elements on top of a transparent substrate, bonding seal caps provided with electronic circuits to the transparent substrate so as to seal each of the organic electroluminescent elements, and then cutting the transparent substrate around each of the organic electroluminescent elements to form organic electroluminescent display elements.Type: ApplicationFiled: July 15, 2003Publication date: January 15, 2004Inventor: Makoto Takamura
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Publication number: 20040007975Abstract: A barrier rib structure for a plasma display panel is described. According to the present invention, horizontal barrier ribs having different widths are located parallel to each other. A plurality of perpendicular barrier ribs is used to divide adjacent horizontal barrier ribs into a plurality of discharge spaces. The different width horizontal barrier ribs cause different heights for horizontal barrier ribs during the sintering process. Therefore, gas passages are formed between the barrier ribs and the upper substrate when the upper and the down substrate are sealed together.Type: ApplicationFiled: July 9, 2002Publication date: January 15, 2004Inventors: Hsu-Pin Kao, Meng-Hsuan Lin, Sheng-Chi Lee, Ching-Hui Lin
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Publication number: 20040007976Abstract: A high efficiency electrode structure for a plasma display panel is described. The high efficiency electrode structure mainly comprises a comb electrode which including a main line across luminant units in row and a plurality of branches perpendicularly expanded from the main line and located between the luminant units. A transparent electrode parallel to the main line of the comb electrode is coupled to the end of the branches of the comb electrode. The end of the branches approximates the discharge center of the luminant units. The discharge electric field of luminant unit is more uniform and the sustaining voltage is lowered.Type: ApplicationFiled: July 9, 2002Publication date: January 15, 2004Inventors: Hsu-Pin Kao, Cing-Chung Cheng, Sheng-Chi Lee, Kuang-Lang Chen
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Publication number: 20040007977Abstract: A driving electrode structure of a plasma display panel is described. The driving electrode structure has a driving electrode located in one luminant cell of each pixel. The driving electrode is formed on a transparent electrode and separated by a distance from the side of the transparent electrode adjacent to the edge of the luminant cells. The driving electrode has two branches coupled to a main electrode or a side electrode at the side of the transparent electrode adjacent to the edge of luminant cells. The driving electrode approximates the discharge center of the luminant cell to improve the driving characteristic.Type: ApplicationFiled: July 9, 2002Publication date: January 15, 2004Inventors: Hsu-Pin Kao, Yuan-Chi Lin, Ching-Hui Lin, Kuang-Lang Chen
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Publication number: 20040007978Abstract: The invention relates to a tungsten electrode which causes minimal cracking when sealed in a quartz glass envelope. The invention includes forming a substantially uniform oxide coating on a selected portion of the shank of a tungsten electrode followed by reducing the oxide coating to substantially elemental tungsten, wherein the electrode exhibits superior properties when sealed in a lamp having a quartz glass envelope. The invention also includes the electrode made by the process.Type: ApplicationFiled: June 25, 2003Publication date: January 15, 2004Applicant: Welch Allyn, Inc.Inventor: Dean A. Bell
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Publication number: 20040007979Abstract: A high-pressure discharge lamp comprises a lamp tube made of quartz glass and having a central portion formed in a spherical shape, and a pair of opposing tungsten electrodes inserted into the lamp tube. At least one of the tungsten electrodes is made of a tungsten material which contains more than 10 ppm of one of Co and Ni, or 10 ppm of Co and Ni in total, or a tungsten material which contains 20 ppm or more of at least two of Fe, Co and Ni in total, or a tungsten material which contains 20 ppm or more of Fe. Fe, Co and Ni belong to iron-group metals. The inter-electrode distance, i.e., distance between the leading ends of both tungsten electrodes is set to approximately 1-2 mm or less.Type: ApplicationFiled: June 10, 2003Publication date: January 15, 2004Inventors: Yasushi Aoki, Masahiro Katoh
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Publication number: 20040007980Abstract: Since electrodes need to be subject to preheating before lighting in a fluorescent lamp, a preheating device such as a glow starter is necessary and it takes a long time to complete lighting. Further, in a fluorescent lamp of a cold-cathode type, which is lit up by applying high voltage between electrodes without preheating, although lighting is instantly carried out, a large ballast having a chalk coil and the like is necessary, thereby increasing the cost. Besides, since it is necessary to fill mercury steam and Argon gas in an arc tube, the material of the arc tube is limited to glass having high resistance to pressure and high hermeticity. An LED chain body 2 formed by connecting a plurality of LED lamps 3 via flexible members 4 is inserted into a transparent or translucent tube 1.Type: ApplicationFiled: July 9, 2002Publication date: January 15, 2004Applicants: HAKUYO DENKYUU KABUSHIKI KAISHA, FUSO DENKI KOUGYOU KABUSHIKI KAISHA, METRO DENKI KOUGYOU KABUSHIKI KAISHAInventor: Yoshihiko Shibata
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Publication number: 20040007981Abstract: When many LED lamps are provided on a printed wiring board to secure an amount of light, light can only be emitted from the side on which the lamps are provided, which limits the range in which light is emitted. To solve this problem, the present invention provides a plurality of chip type LED lamps 1 chained using conductive members 2 made of a flexible plate material.Type: ApplicationFiled: July 9, 2002Publication date: January 15, 2004Applicants: HAKUYO DENKYUU KABUSHIKI KAISHA, FUSO DENKI KOUGYOU KABUSHIKI KAISHA, METRO DENKI KOUGYOU KABUSHIKI KAISHAInventor: Yoshihiko Shibata
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Publication number: 20040007982Abstract: A highway light with an automatic backup lighting system includes a voltage supply, a switching mechanism electrically connected with the voltage supply, a current sensing device electrically connected with the voltage supply and the switching mechanism, a primary lamp electrically connected with the current sensing device and the voltage supply, and a secondary lamp electrically connected with the switching mechanism, wherein the current sensing device activates the switching mechanism to direct voltage to the secondary lamp when the current sensing mechanism senses low amperage from its connection with the primary lamp.Type: ApplicationFiled: July 10, 2003Publication date: January 15, 2004Inventor: Gary L. Rapp
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Publication number: 20040007983Abstract: 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.Type: ApplicationFiled: August 29, 2003Publication date: January 15, 2004Applicant: TOKYO ELECTRON LIMITEDInventors: Murray D. Sirkis, Joseph T. Verdeyen
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Publication number: 20040007984Abstract: An RF generator is provided for use in an RF plasma system. The RF generator includes: a power source that is operable to generate RF power signals at a tuned frequency; a sensor unit that is adapted to detect the RF power signals and operable to generate analog signals representative of the RF power signals, where the analog signals include a frequency of interest and a plurality of interfering frequency components; and a sensor signal processing unit that is adapted to receive the analog signals from the sensor unit and to band limit the analog signals within a predefined bandwidth that passes the frequency of interest and rejects interfering frequency components.Type: ApplicationFiled: July 10, 2002Publication date: January 15, 2004Inventors: David J. Coumou, Michael L. Kirk
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Publication number: 20040007985Abstract: Apparatus for producing and sustaining a glow discharge plasma in a plasma discharge space comprising at least two oppositely spaced electrodes, means for supplying a gas or a gas mixture under atmospheric pressure conditions in the discharge space, AC power supply means for energizing the electrodes, and electric stabilisation means for stabilizing current variations in the plasma. The stabilisation means connect between the electrodes and the power supply means, and are arranged for providing a negative feedback opposed to a positive feedback of the plasma to instabilities in the plasma.Type: ApplicationFiled: July 11, 2002Publication date: January 15, 2004Inventors: Hindrik Willem de Vries, Fuyuhiko Mori, Eugen Aldea, Mauritius Cornelius Maria Van De Sanden
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Publication number: 20040007986Abstract: A high frequency AC current-sourcing driving that can feed electrical loads with a constant current that is independent of load resistance. The driver is a self-oscillating inverter that includes a resonant network comprising a resonant capacitor and a resonant inductor. A current comparing and toggling circuit (CCTC) is used to generate the control signals of the inverter's power switches. Also included in the system is a DC blocking capacitor that prevents the DC voltage from reaching the resonant network.Type: ApplicationFiled: May 29, 2003Publication date: January 15, 2004Inventors: Jorge M. Parra, Jorge M. Parra, Shmuel Ben-Yaakov
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Publication number: 20040007987Abstract: An organic electroluminescent module is disclosed. The organic electroluminescent module comprises a plurality of scan lines, a plurality of data lines perpendicular to the plurality of scan lines, a plurality of light emitting diodes formed at cross regions of the plurality of scan lines and the plurality of data lines, a scan driver having inverse voltage applying transistors and ground voltage applying transistors respectively connected to the plurality of scan lines, a data driver having static current sources and ground voltage applying transistors respectively connected to the plurality of data lines, and a driver controller for controlling the scan driver and the data driver. Impurities in the organic EL module can easily be eliminated by an inverse voltage. As a result, a lifetime of the organic EL module can be prolonged and quality of display can be improved.Type: ApplicationFiled: May 9, 2003Publication date: January 15, 2004Inventors: Hak Su Kim, Jong Geun Yoon, Sung Tae Kim
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Publication number: 20040007988Abstract: An electron emitting structure having deflectable electrodes, such as found in grating light valves (GLVs) is provided. In one implementation, the structure includes a substrate having base electrodes and gate electrodes coupled thereto and insulated from each other, and an emitting material deposited on active regions of the base electrodes. Upon applying a voltage potential difference between a base electrode and a gate electrode, a portion of one of the base electrode and the gate electrode deflects through electrostatic force positioning the portion of the one of the base electrode and the gate electrode relative to another one of the base electrode and the gate electrode such that an electric field is produced that is sufficient to cause an emission from an emitting material deposited on the base electrode. In preferred form, lower drive voltages are required to provide the electric field without requiring sub-micron spacing between electrodes.Type: ApplicationFiled: January 21, 2003Publication date: January 15, 2004Applicants: Sony Corporation, a Japanese Corporation, Sony Electronics, a Delaware CorporationInventors: Jack Barger, James Qian Wang, Benjamin Edward Russ, Jean-Pierre Guillou
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Publication number: 20040007989Abstract: A driving circuit for an organic light emitting diode comprises the following elements. A driving transistor has a control terminal, a first electrode and a second electrode, wherein the first electrode and the second electrode are connected to a power line and the organic light emitting diode. A first switch device can be turned on by a scan signal to electrically conduct the power line and the control terminal of the driving transistor for maintaining the control terminal at the voltage level of the scan signal. And a second switch device can be turned on by the scan signal to electrically conduct a data line and the second electrode of the driving transistor for transferring the data signal to the second electrode and maintaining the second electrode at the voltage level of the data signal.Type: ApplicationFiled: March 26, 2003Publication date: January 15, 2004Applicant: AU Optronics Corp.Inventor: Chun-Huai Li
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Publication number: 20040007990Abstract: Disclosed is a light generation apparatus capable of widely changing the intensity of generated light. The light generation apparatus includes an X-ray source (10), high-voltage generation circuit (20), and CPU (40). The high-voltage generation circuit (20) has a plurality of capacitors (C1-C3), and a plurality of switches (S1-S6) which are arranged on the charging and discharging paths of the capacitors. The CPU (40) controls the switches to switch a capacitor for supplying electric energy to the X-ray point source (10), thereby changing electric energy supplied to the X-ray point source (10).Type: ApplicationFiled: June 19, 2003Publication date: January 15, 2004Applicant: Canon Kabushiki KaishaInventor: Atsushi Kitaoka
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Publication number: 20040007991Abstract: An apparatus controlling a cold cathode fluorescent lamp and a scanning apparatus having the same are disclosed.Type: ApplicationFiled: May 22, 2003Publication date: January 15, 2004Applicant: Samsung Electronics Co., Ltd.Inventors: Han-Chung Ryu, Jong-Yang Choo
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Publication number: 20040007992Abstract: An integrated circuit for controlling a power supply circuit which delivers power to a load circuit that includes a fluorescent lamp, comprising ballast control and drive circuitry that provides drive signals to the power supply circuit, receives sense signals indicating operating conditions of at least one of the power supply circuit and the load circuit, and responds to the sense signals by modifying the drive signals; and including adaptive zero-voltage-switching and minimum-current-switching (ZVMCS) circuitry, wherein the ZVMCS circuitry senses an output of the power supply circuit, and in response thereto, controls the drive circuitry to maintain the power supply circuit under ZVMCS conditions.Type: ApplicationFiled: July 8, 2003Publication date: January 15, 2004Applicant: International Rectifier CorporationInventor: Thomas J. Ribarich
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Publication number: 20040007993Abstract: The present invention provides a RF wireless remote-control brightness-adjustable energy-saving lamp, which comprises a brightness-adjustable energy-saving lamp and a RF remote-control module. The brightness-adjustable energy-saving lamp has a RF wireless receiver circuit therein to receive a remote-control signal and transmit it to a CPU. The CPU is used to discriminate the remote-control signal, convert it into a PWM signal, and output the PWM signal to a pulse-to-DC-voltage-level output circuit. The pulse-to-DC-voltage-level output circuit is used to convert the PWM signal into a DC voltage level. A VCO circuit connected to a starter power source circuit and a lamp tube lighting driving circuit is also provided. The lamp tube lighting driving circuit is connected to a lamp tube. The VCO circuit is used to drive the lamp tube lighting driving circuit according to the DC voltage level for adjusting the luminescent brightness of the lamp tube.Type: ApplicationFiled: July 10, 2002Publication date: January 15, 2004Inventor: Linsong Weng
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Publication number: 20040007994Abstract: A computer system and method to assist engineers in the design of dimming or non-dimming electronic ballasts for lamps based around lighting control ICs. The system and method reduces the design time dramatically by performing the complex iterative procedure required to optimize the operating points and component values of the circuit. The system and method produces a schematic, a bill of materials (listing all component values) and winding specifications for the inductors. The system contains a database of operating parameters for different types of lamps with the ability to add new lamps. The system also supports different configurations for one or two lamp ballast configurations.Type: ApplicationFiled: July 11, 2002Publication date: January 15, 2004Applicant: International Rectifier CorporationInventors: Thomas J. Ribarich, Peter Green
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Vector control system for permanent magnet sychronous machines using an open-loop parameter observer
Publication number: 20040007995Abstract: A method for vector control of a permanent magnet motor is provided. A torque command is provided from an open-loop observer circuit, which is manipulated to produce an AC voltage command to be applied to a permanent magnet motor. Also provided is a method for utilizing an open-loop observer circuit apparatus. The open-loop observer circuit apparatus takes three-phase inverter pole voltages and uses them to estimate electrical parameters of the permanent magnet motor A method for calculating three-phase inverter pole voltages is also provided, as is used in the open-loop observer circuit. A plurality of voltages are multiplied by the DC bus voltage to calculate the three-phase inverter pole voltages. Finally, a method for estimating electrical parameters is provided, as used in the open-loop observer circuit. Synchronous reference magnetic fluxes and currents are calculated, and these values are used to estimate the electrical parameters.Type: ApplicationFiled: July 11, 2002Publication date: January 15, 2004Applicant: Visteon Global Technologies, Inc.Inventor: Zhenxing Fu -
Publication number: 20040007996Abstract: In a motor rotation rate detecting circuit incorporating a conventional differentiating circuit, raising the upper limit of the differentiating operation frequency of the differentiating circuit to cope with an increased range of the motor rotation rate causes the differentiating circuit to amplify high-frequency noise when the motor is rotating at a low rate. To solve this problem, a motor rotation rate detecting circuit embodying the invention incorporates a differentiating circuit that produces a rotation rate detection signal by differentiating a plurality of alternating signals having different phases that are output according to the rotation position of the motor, and the frequency response of the differentiating operation of the differentiating circuit is switchable according to the voltage of the rotation rate detection signal.Type: ApplicationFiled: July 2, 2003Publication date: January 15, 2004Applicant: ROHM CO., LTDInventor: Koji Nishikawa
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Publication number: 20040007997Abstract: A method for achieving torque control of a permanent magnet synchronous motor is provided where operating conditions of the motor are sensed and used in a lookup table to retrieve corresponding reference values for calculating the electric current commands from a torque command. A lookup table for control of a permanent magnet synchronous motor is also provided. The lookup table comprises an input for at least one reference operating condition, with an output value of a retrieval operating condition for each value of the reference operating conditions. A method for lookup table control of a permanent magnet synchronous motor is also provided where an inductance differential and an uncompensated magnetic flux linkage are computed with a lookup table and limited. These values are then used to calculate an estimated inductance and a magnetic flux linkage.Type: ApplicationFiled: July 11, 2002Publication date: January 15, 2004Applicant: Visteon Global Technologies, Inc.Inventor: Zhenxing Fu
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Publication number: 20040007998Abstract: In a motor driver, based on driving waveforms of respective phases generated by a driving waveform generator, a power feeder feeds respective phase-coils with an alternating current consecutively changing in sine wave. Further, a phase advancing controller adjusts phases of the driving waveform, and performs phase-advancing control such that each phase of back electromotive forces induced in respective phase-coils generally coincides with a phase of the ac running through the coils. In phase-advancing controlling, a phase current is detected with a common current. The structure discussed above can reduce torque ripples, vibrations and noises, and a motor thus can be driven efficiently.Type: ApplicationFiled: February 24, 2003Publication date: January 15, 2004Inventors: Masahiro Yasohara, Kenji Sugiura
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Publication number: 20040007999Abstract: A method for implementing active deadtime control of an inverter associated with an electric motor is disclosed. In an exemplary embodiment, the method includes receiving a command voltage signal indicative of a desired load to be driven by the motor. Based upon the value of the command voltage signal, a determined value of deadtime is applied to switching circuitry in the inverter, wherein the value of deadtime relates to an amount of time in which the switching of a device in the switching circuitry is delayed so as to prevent a short circuit condition within the inverter.Type: ApplicationFiled: October 14, 2002Publication date: January 15, 2004Inventors: Mark D. Kushion, Dennis B. Skellenger
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Publication number: 20040008000Abstract: The present invention is directed to a wiper system (10) using two wipers (12, 14) and two wiper motors (26, 28), which drive the wipers (12, 14) and of which at least one first wiper motor (26) forms a sub-assembly with an electronic control unit (34). It is proposed to design the second wiper motor (28) as rotary motor having only one sensory system (36) for detecting the absolute and relative rotational position of its driven shaft (32), which generates corresponding signals for the control unit (34) of the first wiper motor (26), and the first wiper motor (26), in the rotational speed and the rotational position of its driven shaft (32), is regulated by the control unit (34) as a function of the rotational position and the rotational speed of the driven shaft (32) of the second wiper motor (28).Type: ApplicationFiled: June 23, 2003Publication date: January 15, 2004Inventors: Wilfried Merkel, Gebhard Michenfelder, Claus Fleischer
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Publication number: 20040008001Abstract: An entrapment detecting device for an opening/closing member includes a controlling means which memorizes a driving condition of a driving means corresponding to load applied to the opening/closing member as a reference load data when a predetermined condition is satisfied during the movement of the opening/closing member for closing. The controlling means further calculates a driving data representing the driving condition during the movement of the opening/closing member for closing after memorizing the reference load data, and an abnormality detecting data generated by eliminating the load during the predetermined condition being satisfied from the driving data based upon the driving data and the reference load data, and the controlling means judges an entrapment based upon the abnormality detecting data.Type: ApplicationFiled: May 30, 2003Publication date: January 15, 2004Applicant: AISIN SEIKI KABUSHIKI KAISHAInventors: Takashi Kikuta, Kentaroh Hirose
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Publication number: 20040008002Abstract: Presence/absence of a failure in a feedback control system of a motor is monitored. When a failure is detected in the feedback control system, the motor is driven by switching to an open-loop control. During the open-loop control, the motor is rotated by sequentially switching the motor current supply phase without feeding back encoder count information. The position count is incremented or decremented every time the current supply phase is switched. When the position count has reached a target count, it is determined that the rotor has reached a target position, whereupon the open-loop control is finished.Type: ApplicationFiled: May 30, 2003Publication date: January 15, 2004Inventors: Shigeru Kamio, Kenichi Fujiki
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Publication number: 20040008003Abstract: A switched reluctance drive is operated as a generator on a high voltage supply which has no long-term energy storage capability. A low voltage supply is used to start the generator through the use of a dedicated priming winding, which provides sufficient energy to allow the generator to build up charge in DC link capacitor(s). Once sufficient charge has built up, the priming winding is de-energized and the generator continues in a steady-state operation.Type: ApplicationFiled: July 8, 2003Publication date: January 15, 2004Applicant: SWITCHED RELUCTANCE DRIVES LIMITEDInventor: Michael James Turner