Patents by Inventor Kazuyoshi Yamada
Kazuyoshi Yamada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6853495Abstract: A wide-angle lens system having a long back focal length, disposed in front of a ?? CCD camera and the focal length (f) for all lens groups is 3.0 mm, the F-number is 3.0 and the half-field angle is 46°. The following conditions are met by the first lens group: 1?d/d3<1.2; R3/R2=0.99; and d2/f=0.03. Here, (d) indicates the thickness of the second lens along the normal line at a given distance from the optical axis within the maximum effective diameter of the object side convex surface of the lens. d3 is the thickness of the second lens along the optical axis.Type: GrantFiled: December 23, 2002Date of Patent: February 8, 2005Assignee: Elmo Company, LimitedInventors: Yasuhiro Kondo, Kazuyoshi Yamada
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Publication number: 20040218101Abstract: The color reproduction correction circuit which corrects the color distortion caused when color signals using the first combination of the three primary colors are reproduced in a color display of the second combination of the different primary color sources has been disclosed, wherein: a provided color correction circuit generates the mixed color signal by multiplying the color signal in question by the specified coefficients and adding the mixed color signal to other color signals; the mixed colors in the second combination are used as primary color light sources in the second combination; the specified coefficients are determined so that these mixed color light sources are made close to the coordinates of the primary color light sources of the first combination; and the luminescent chromaticity values of the three primary colors are corrected so that the chromaticity values of the device match those specified by the signal system.Type: ApplicationFiled: June 4, 2004Publication date: November 4, 2004Applicant: Fujitsu Hitachi Plasma Display LimitedInventors: Ken Kumakura, Kazuyoshi Yamada, Hideaki Ohki, Hiroshi Ohtaka, Toshio Ueda
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Patent number: 6781322Abstract: A capacitive load circuit and a plasma display apparatus using such a circuit, being able to use a sustain transistor having a voltage rating in accordance with a sustain voltage even when a voltage larger than the sustain voltage is applied to a sustain electrode, have been disclosed, wherein a switch whose one end is connected to a capacitive load is comprised and when a third voltage, whose voltage difference from a second voltage is larger than the voltage difference between a first voltage and the second voltage, is applied to the capacitive load, a fourth voltage is selectively applied to the other end of the switch.Type: GrantFiled: January 22, 2003Date of Patent: August 24, 2004Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Makoto Onozawa, Eiji Ito, Ken Kumakura, Hideaki Ohki, Masaki Kamada, Kazuyoshi Yamada
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Patent number: 6753930Abstract: The color reproduction correction circuit which corrects the color distortion caused when color signals using the first combination of the three primary colors are reproduced in a color display of the second combination of the different primary color sources has been disclosed, wherein: a provided color correction circuit generates the mixed color signal by multiplying the color signal in question by the specified coefficients and adding the mixed color signal to other color signals; the mixed colors in the second combination are used as primary color light sources in the second combination; the specified coefficients are determined so that these mixed color light sources are made close to the coordinates of the primary color light sources of the first combination; and the luminescent chromaticity values of the three primary colors are corrected so that the chromaticity values of the device match those specified by the signal system.Type: GrantFiled: June 12, 2001Date of Patent: June 22, 2004Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Ken Kumakura, Kazuyoshi Yamada, Hideaki Ohki, Hiroshi Ohtaka, Toshio Ueda
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Patent number: 6710774Abstract: A map display device, which imparts a perspective feeling to a route guidance line so that it can be easily viewed, when buildings and roads are three-dimensionally displayed. A map display device having a control unit for three-dimensionally displaying a map and further three-dimensionally displaying a route guidance line on a road on the map. When the route guidance line is hidden by a building, the control unit displays overlapped portion of the route guidance line in a color different from the color of the portions that are not overlapping. In particular, the control unit draws picture by a semitransparent method in which the color displaying the route guidance line and the color displaying the building are alternately changing with a pixel as a unit on the video RAM (VRAM). In this case, a positional relationship becomes clear between the route guidance line and the building, and the route guidance line can be seen more clearly.Type: GrantFiled: May 1, 2000Date of Patent: March 23, 2004Assignee: Denso CorporationInventors: Koji Kawasaki, Motohiro Fukumoto, Masatoshi Abou, Takashi Ichida, Kazuyoshi Yamada
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Publication number: 20030214244Abstract: A capacitive load circuit and a plasma display apparatus using such a circuit, being able to use a sustain transistor having a voltage rating in accordance with a sustain voltage even when a voltage larger than the sustain voltage is applied to a sustain electrode, have been disclosed, wherein a switch whose one end is connected to a capacitive load is comprised and when a third voltage, whose voltage difference from a second voltage is larger than the voltage difference between a first voltage and the second voltage, is applied to the capacitive load, a fourth voltage is selectively applied to the other end of the switch.Type: ApplicationFiled: January 22, 2003Publication date: November 20, 2003Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITEDInventors: Makoto Onozawa, Eiji Ito, Ken Kumakura, Hideaki Ohki, Masaki Kamada, Kazuyoshi Yamada
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Publication number: 20030184539Abstract: A low-cost capacitive load drive circuit, in which a reference voltage, a first voltage, and a second voltage are supplied to a capacitive load, and a plasma display apparatus using it, have been disclosed. The capacitive load drive circuit comprises a reference voltage switch the breakdown voltage of which is properly adjusted, a first switch, a reference voltage phase adjusting circuit, and a first phase adjusting circuit, and malfunctions due to the difference in switching characteristics can be prevented from occurring even when devices of different breakdown voltages are used.Type: ApplicationFiled: November 19, 2002Publication date: October 2, 2003Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITEDInventors: Makoto Onozawa, Hideaki Ohki, Masaki Kamada, Kazuyoshi Yamada, Eiji Ito
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Publication number: 20030117721Abstract: In a wide-angle lens system having a long back focal length, the various types of aberration, particularly distortion, are kept small. The wide-angle lens system 100 is disposed in front of a ⅓″ CCD camera 40 and the focal length (f) for all lens groups is 3.0 mm, the F-number is 3.0 and the half-field angle is 46°.Type: ApplicationFiled: December 23, 2002Publication date: June 26, 2003Applicant: Elmo Company, LimitedInventors: Yasuhiro Kondo, Kazuyoshi Yamada
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Publication number: 20030110669Abstract: A construction machine of the present invention is provided, in a compartment formed by a cover, with an engine, a centrifugal fan, and a heat exchanger for exchanging heat between cooling air blown by the centrifugal fan and a specified medium, wherein the centrifugal fan and the heat exchanger are arranged further upstream than the engine with respect to flow of cooling air, so that cooling air sucked in by the centrifugal fan is led to the engine after passing through the heat exchanger.Type: ApplicationFiled: October 15, 2002Publication date: June 19, 2003Inventors: Osamu Watanabe, Seiichiro Takeshita, Takaharu Nishimura, Kazuyoshi Yamada, Makoto Sugaya, Makoto Motozu, Naohiro Ishikawa, Shougo Kimura
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Patent number: 6526242Abstract: An image forming apparatus with a plurality of units operatively connected together is disclosed. A main power switch is mounted on one side wall of a copier body unit while a paper discharge unit next to the copier body unit is formed with a recess facing the main power switch. The recess defines an opening only great enough for a person to touch the main power switch with a fingertip. Even when the different units are combined without any clearance therebetween, the main power switch can be operated via the above opening. In addition, the main power switch is not easily visible and can therefore be prevented from being inadvertently turned off.Type: GrantFiled: April 8, 2002Date of Patent: February 25, 2003Assignee: Ricoh Company, Ltd.Inventors: Masaaki Kabumoto, Kazuyoshi Yamada
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Publication number: 20020110384Abstract: An image forming apparatus with a plurality of units operatively connected together is disclosed. A main power switch is mounted on one side wall of a copier body unit while a paper discharge unit next to the copier body unit is formed with a recess facing the main power switch. The recess defines an opening only great enough for a person to touch the main power switch with a fingertip. Even when the different units are combined without any clearance therebetween, the main power switch can be operated via the above opening. In addition, the main power switch is not easily visible and can therefore be prevented from being inadvertently turned off.Type: ApplicationFiled: April 8, 2002Publication date: August 15, 2002Inventors: Masaaki Kabumoto, Kazuyoshi Yamada
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Patent number: 6396410Abstract: An image forming apparatus includes a display block made up of two pairs of lamp units of different colors alternating with each other. The display block has its top divided into four rectangles by a cross; nearby rectangles are different in color from each other. The four sides of the display block each are vertically divided into two portions. The two portions of each side respectively share the same colors with the rectangles of the top contiguous therewith. The apparatus allows a person to see its operating status being indicated by the display block anywhere in any direction without any dead angle.Type: GrantFiled: October 20, 1999Date of Patent: May 28, 2002Assignee: Ricoh Company, Ltd.Inventors: Masaaki Kabumoto, Kazuyoshi Yamada
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Patent number: 6389249Abstract: An image forming apparatus with a plurality of units operatively connected together is disclosed. A main power switch is mounted on one side wall of a copier body unit while a paper discharge unit next to the copier body unit is formed with a recess facing the main power switch. The recess defines an opening only great enough for a person to touch the main power switch with a fingertip. Even when the different units are combined without any clearance therebetween, the main power switch can be operated via the above opening. In addition, the main power switch is not easily visible and can therefore be prevented from being inadvertently turned off.Type: GrantFiled: March 27, 2001Date of Patent: May 14, 2002Assignee: Ricoh Company, Ltd.Inventors: Masaaki Kabumoto, Kazuyoshi Yamada
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Publication number: 20020012073Abstract: The color reproduction correction circuit which corrects the color distortion caused when color signals using the first combination of the three primary colors are reproduced in a color display of the second combination of the different primary color sources has been disclosed, wherein: a provided color correction circuit generates the mixed color signal by multiplying the color signal in question by the specified coefficients and adding the mixed color signal to other color signals; the mixed colors in the second combination are used as primary color light sources in the second combination; the specified coefficients are determined so that these mixed color light sources are made close to the coordinates of the primary color light sources of the first combination; and the luminescent chromaticity values of the three primary colors are corrected so that the chromaticity values of the device match those specified by the signal system.Type: ApplicationFiled: June 12, 2001Publication date: January 31, 2002Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITEDInventors: Ken Kumakura, Kazuyoshi Yamada, Hideaki Ohki, Hiroshi Ohtaka, Toshio Ueda
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Publication number: 20010009620Abstract: An image forming apparatus with a plurality of units operatively connected together is disclosed. A main power switch is mounted on one side wall of a copier body unit while a paper discharge unit next to the copier body unit is formed with a recess facing the main power switch. The recess defines an opening only great enough for a person to touch the main power switch with a fingertip. Even when the different units are combined without any clearance therebetween, the main power switch can be operated via the above opening. In addition, the main power switch is not easily visible and can therefore be prevented from being inadvertently turned off.Type: ApplicationFiled: March 27, 2001Publication date: July 26, 2001Applicant: RICOH COMPANY, LTDInventors: Masaaki Kabumoto, Kazuyoshi Yamada
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Patent number: 6259866Abstract: An image forming apparatus includes an operation and display device having an LCD (Liquid Crystal Display) panel or similar touch panel and a key portion including various keys mounted on its body. The body is curved with a suitable curvature in the up-and-down direction and right-and-left direction. The display surface of the touch panel and the key portion are positioned on the concave side of the curved body; the key portion is arranged below the display surface. The distance between the concave surface and the operator is the same at all positions on the concave surface. The operator can therefore smoothly operate both of the touch panel and key portion with by moving the operator's arm, hand and eyes little.Type: GrantFiled: October 20, 1999Date of Patent: July 10, 2001Assignee: Ricoh Company, Ltd.Inventors: Masaaki Kabumoto, Kazuyoshi Yamada
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Patent number: 6226475Abstract: An image forming apparatus with a plurality of units operatively connected together is disclosed. A main power switch is mounted on one side wall of a copier body unit while a paper discharge unit next to the copier body unit is formed with a recess facing the main power switch. The recess defines an opening only great enough for a person to touch the power switch with a fingertip. Even when the different units are combined without any clearance therebetween, the main power switch can be operated via the above opening. In addition, the main power switch is not easily visible and can therefore be prevented from being inadvertently turned off.Type: GrantFiled: January 21, 2000Date of Patent: May 1, 2001Assignee: Ricoh Company, Ltd.Inventors: Masaaki Kabumoto, Kazuyoshi Yamada
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Patent number: D443886Type: GrantFiled: June 17, 1999Date of Patent: June 19, 2001Assignee: Ricoh Company, Ltd.Inventors: Masaaki Kabumoto, Kazuyoshi Yamada, Yoshihisa Minakawa, Taijiroh Sueishi, Goroh Katsuyama
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Patent number: D474498Type: GrantFiled: September 11, 2002Date of Patent: May 13, 2003Assignee: Ricoh Company, Ltd.Inventors: Masanao Takahashi, Kazuyoshi Yamada, Shigeru Horiguchi
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Patent number: D432160Type: GrantFiled: June 17, 1999Date of Patent: October 17, 2000Assignee: Ricoh Company, Ltd.Inventors: Masaaki Kabumoto, Kazuyoshi Yamada, Yoshihisa Minakawa, Taijiroh Sueishi, Goroh Katsuyama