Patents Assigned to Sharp Kabushiki Kaishi
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Patent number: 6097452Abstract: The transmission type liquid crystal display device of this invention includes: gate lines; source lines; and switching elements each arranged near a crossing of each gate line and each source line, a gate electrode of each switching element being connected to the gate line, a source electrode of the switching element being connected to the source line, and a drain electrode of the switching element being connected to a pixel electrode for applying a voltage to a liquid crystal layer, wherein an interlayer insulating film formed of an organic film with high transparency is provided above the switching element, the gate line, and the source line, and wherein the pixel electrode formed of a transparent conductive film is provided on the interlayer insulating film.Type: GrantFiled: July 6, 1998Date of Patent: August 1, 2000Assignee: Sharp Kabushiki KaishiInventors: Takayuki Shimada, Masaru Kajitani, Masaya Okamoto, Naofumi Kondo, Mikio Katayama, Yoshikazu Sakuhana, Akihiro Yamamoto, Yukinobu Nakata, Hirohiko Nishiki, Yoshinori Shimada
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Patent number: 6084614Abstract: Featured is an imaging forming apparatus that provides minute particles having a uniform diameter and being uniformly charged. The image forming apparatus includes a supplying member that supplies charged developing particles, a counter electrode disposed opposite to the supplying member and a control electrode disposed therebetween and including a plurality of passing holes serving as passages for the developing particles. While a potential for generating a predetermined potential difference is applied between the supplying member and the counter electrode, the potential being applied to the control electrode is changed in order to change an electric field existing between the supplying member and the counter electrode. This controls flying of the developing particles passing through the passing holes in a direction from the supplying member to the counter electrode, and thus the forming of the image.Type: GrantFiled: March 20, 1998Date of Patent: July 4, 2000Assignee: Sharp Kabushiki KaishiInventors: Hideo Yamasa, Kouichi Irihara
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Patent number: 6050827Abstract: A thin film transistor where source and drain electrodes are film laminates including at least two layers. A first layer film of the laminate, which is formed to a thickness of 10 to 700 .ANG. is in ohmic contact with underlying semiconductor film. A second layer film, formed on the first layer film has a thickness of more than about 2000 .ANG. and is a material having a sufficient adhesion strength even when formed at a temperature which is less than the temperature corresponding to the materials vapor pressure. Further, the materials used for the source and drain electrodes can be formed into thin films by ordinary sputtering or vacuum deposition techniques, low in cost, and readily available.Type: GrantFiled: January 14, 1993Date of Patent: April 18, 2000Assignee: Sharp Kabushiki KaishiInventors: Sadatoshi Takechi, Tadanori Hishida, Fumiaki Funada
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Patent number: 5358819Abstract: The object of the invention is to provide a developer for electrophotography which may present stable charging properties and image density after a prolonged period of copying operations as well as have a long life. The object can be achieved by providing a developer for electrophotography, compounded of: a toner component; and a carrier component prepared from a ferrite powder mixture in total of 100 parts, consisting of 10 to 90 parts by weight of a ferrite powder having a specific surface range of 200 to 230 cm.sup.2 /g, and 10 to 90 parts by weight of a ferrite powder having a specific surface range of more than 230 to 300 cm.sup.2 /g.Type: GrantFiled: April 13, 1993Date of Patent: October 25, 1994Assignee: Sharp Kabushiki KaishiInventors: Yoshinori Urata, Toshihisa Ishida, Norio Tateishi, Shigeaki Tasaka, Naotaka Funayama
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Patent number: 5257105Abstract: An improved flat display apparatus such as a liquid crystal display apparatus is disclosed. The apparatus is constructed so that when video signals from a VTR is reproduced to be displayed, the switching noise portion included in the video signals is changed to black level before being displayed, the section within the picture image area in which the switching noise originally appeared is masked by black level, making it possible to conceal the disorder in the picture image. In the case where television video signals are to be displayed, the picture can be enjoyed on a wide picture image area because the mask of black level is not generated.Type: GrantFiled: November 30, 1992Date of Patent: October 26, 1993Assignee: Sharp Kabushiki KaishiInventors: Masaru Tanaka, Masanobu Okano, Katsuya Mizukata, Makoto Takeda
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Patent number: 5243303Abstract: A noise generating device comprises a generator (1) including a shift register (1a) which performs shift operations to sequentially shift a bit in an input stage to a next higher significant stage. An exclusive-OR circuit (1b) performs exclusive-OR operations between a pair of bits from selected stages of the shift register and feeds back to the input stage of the shift register. A filter (2) receives the pseudo-random data and outputs an analog signal. The filter comprises an operational amplifier (2a). Respective outputs of the stages of the shift register are alternately applied to non-inverting and inverting inputs of the operational amplifier through respective resistors (R1, . . . ,R23).Type: GrantFiled: January 29, 1992Date of Patent: September 7, 1993Assignee: Sharp Kabushiki KaishiInventors: Yasumoto Murata, Shuichi Yoshikawa, Yuji Nishiwaki
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Patent number: 5239428Abstract: A magnetic tape recording/reproducing apparatus wherein an area consisting of a predetermined number of successive tracks on a magnetic tape constitutes a unit record area, the unit record area being partitioned into at least two divisional record areas each consisting of successive tracks so that plural systems of data are allocated to the divisional record areas for being separately recorded therein for individual systems, wherein together with first identification data indicative of the order of track arrangement and second identification data for identifying the divisional record area in which the track is included are recorded, as third identification data, first identification data for a track located at the beginning of the divisional record area in which the track is included.Type: GrantFiled: November 27, 1991Date of Patent: August 24, 1993Assignee: Sharp Kabushiki KaishiInventors: Syuzou Nishida, Kousou Hayashi
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Patent number: 5229634Abstract: vertical power MOSFET which comprises a semiconductive substrate of a first conductivity type serving as drain, an impurity region of a second conductivity type on a part of the surface of the semiconductive substrate, an impurity region of a first conductivity type formed on a part of the surface of the second conductivity type impurity region and serving as source, and a surface portion of a second conductivity type semiconductive substrate between source and drain serving as a channel portion with a gate electrode thereon through an insulating film, so that voltage is applied to the gate electrode to control channel current between source and drain, wherein the first conductivity type semiconductive substrate comprises a low resistivity layer and a high resistivity layer epitaxially formed on the low resistivity layer, and at an interface between the low resistivity layer and the high resistivity layer is provided a convexed portion which projects at least to the high resistivity layer side.Type: GrantFiled: August 5, 1991Date of Patent: July 20, 1993Assignee: Sharp Kabushiki KaishiInventors: Minoru Yoshioka, Mitsuo Matsunami, Toshiaki Miyajima, Hideyuki Tsuji
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Patent number: 4824211Abstract: A method of driving a liquid crystal display device by a voltage averaging method comprises the step of operating this device at a bias ratio which is larger than the theoretically optimum bias ratio for the device so that unevenness in contrast is reduced.Type: GrantFiled: December 18, 1987Date of Patent: April 25, 1989Assignee: Sharp Kabushiki KaishiInventor: Tetsuo Murata
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Patent number: 4792650Abstract: A module mounting system for an electronic device capable of mounting a pair of electronic components each including a locking groove. The mounting system includes an operation switch having an engaging member to be engaged with the locking groove in each of the electronic components mounted on the electronic device. The operation switch provides a locking position to make the engaging member fit in the locking grooves simultaneously and a plurality of unlocking positions for unlocking one of the components selectively. The operation switch shuts off power supply to the electronic device when set at any of the unlocking positions, or supplies power to the electronic device when set at the locking position.Type: GrantFiled: July 24, 1987Date of Patent: December 20, 1988Assignee: Sharp Kabushiki KaishiInventor: Masahiro Iwai
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Patent number: 4596914Abstract: A motor drive for a heater in a microwave oven is disclosed which drives the rotation of the heater by the motor and controls the rotation of the motor with a control device to automatically position the heater suitably for cooking, thus preventing under or overcooking. A device is provided to permit the heater to rotate freely between a vertical position opposing a convection fan in the heating chamber and a horizontal position directly above a tray, a motor and transmission device are provided to drive the rotation of the heater, and a control device is provided to control the rotation of the motor.Type: GrantFiled: March 28, 1985Date of Patent: June 24, 1986Assignee: Sharp Kabushiki KaishiInventor: Taisuke Morino
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Patent number: D303678Type: GrantFiled: September 24, 1986Date of Patent: September 26, 1989Assignee: Sharp Kabushiki KaishiInventors: Takahisa Yubisui, Hiroshi Sakaguchi, Masaki Kawamura