Patents by Inventor Kyoji Kariya
Kyoji Kariya 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: 7746295Abstract: There is provided a plasma display device capable of high luminous efficacy and stable driving for displaying images at various image display load factors. The plasma display device performs the sustain discharge for a light-emission display, and is configured to apply a sustain pulse voltage between a sustain electrode pair in a respective one of the plural discharge cells to generate a sustain discharge in a respective one of the following operating modes selected based upon use of the plasma display device: (a) generating a pre-discharge and then a main discharge; (b) generating a main discharge without a pre-discharge preceding the main discharge; and (c) switching between the mode (a) and the mode (b). The sustain voltage waveforms are used which compensate for an increase in voltage drop due to an increase in discharge current when the image display load factor is excessively increased.Type: GrantFiled: October 20, 2006Date of Patent: June 29, 2010Assignee: Hitachi, Ltd.Inventors: Kenichi Yamamoto, Keizo Suzuki, Masatoshi Shiiki, Kyoji Kariya, Tomokatsu Kishi, Tetsuya Sakamoto, Takashi Sasaki, Takayuki Shimizu
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Publication number: 20090284521Abstract: A plasma display device of high luminous efficiency is provided. In a plasma display device for performing driving including at least an address period and a sustain-discharge period for emission display, the sustain-discharge period includes a pulse application period and an open period, a voltage of an electrode to which a relatively positive voltage is applied in a sustain-discharge electrode pair in a pulse application period immediately before the open period is set as Vsp, and the voltage of the other electrode is set as Vsn, Vsp-Vsn has a significantly negative value in the open period, and light is emitted by a discharge in the open period.Type: ApplicationFiled: July 22, 2009Publication date: November 19, 2009Inventors: Kenichi YAMAMOTO, Keizo Suzuki, Hiroshi Kajiyama, Shirun Ho, Tomokatsu Kishi, Kyoji Kariya
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Patent number: 7535438Abstract: A PDP apparatus, the peak luminance of which has been improved with little modification of the existing circuit structure, has been disclosed, in which a thinning process that shortens an address period by hiding part of display lines in a fixed subfield of a low luminance is performed, the saved time is increased by an amount corresponding to that from which the luminance weight (the number of sustain discharge pulses, that is, the length of the sustain discharge period) of the thinned subfield of a low luminance is subtracted, and the remaining time is allocated at the ratio of the luminance weights on completion of the first step in each subfield.Type: GrantFiled: April 8, 2005Date of Patent: May 19, 2009Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Masanori Takeuchi, Kyoji Kariya
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Publication number: 20070035474Abstract: There is provided a plasma display device capable of high luminous efficacy and stable driving for displaying images at various image display load factors. The plasma display device performs the sustain discharge for a light-emission display, and is configured to apply a sustain pulse voltage between a sustain electrode pair in a respective one of the plural discharge cells to generate a sustain discharge in a respective one of the following operating modes selected based upon use of the plasma display device: (a) generating a pre-discharge and then a main discharge; (b) generating a main discharge without a pre-discharge preceding the main discharge; and (c) switching between the mode (a) and the mode (b). The sustain voltage waveforms are used which compensate for an increase in voltage drop due to an increase in discharge current when the image display load factor is excessively increased.Type: ApplicationFiled: October 20, 2006Publication date: February 15, 2007Inventors: Kenichi Yamamoto, Keizo Suzuki, Masatoshi Shiiki, Kyoji Kariya, Tomokatsu Kishi, Tetsuya Sakamoto, Takashi Sasaki, Takayuki Shimizu
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Patent number: 7145522Abstract: There is provided a plasma display device capable of high luminous efficacy and stable driving for displaying images at various image display load factors. The plasma display device performs the sustain discharge for a light-emission display, and is configured to apply a sustain pulse voltage between a sustain electrode pair in a respective one of the plural discharge cells to generate a sustain discharge in a respective one of the following operating modes selected based upon use of the plasma display device: (a) generating a pre-discharge and then a main discharge; (b) generating a main discharge without a pre-discharge preceding the main discharge; and (c) switching between the mode (a) and the mode (b). The sustain voltage waveforms are used which compensate for an increase in voltage drop due to an increase in discharge current when the image display load factor is excessively increased.Type: GrantFiled: August 28, 2003Date of Patent: December 5, 2006Assignees: Hitachi, Ltd., Fujitsu Hitachi Plasma Display LimitedInventors: Kenichi Yamamoto, Keizo Suzuki, Masatoshi Shiiki, Kyoji Kariya, Tomokatsu Kishi, Tetsuya Sakamoto, Takashi Sasaki, Takayuki Shimizu
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Publication number: 20050168414Abstract: A PDP apparatus, the peak luminance of which has been improved with little modification of the existing circuit structure, has been disclosed, in which a thinning process that shortens an address period by hiding part of display lines in a fixed subfield of a low luminance is performed, the saved time is increased by an amount corresponding to that from which the luminance weight (the number of sustain discharge pulses, that is, the length of the sustain discharge period) of the thinned subfield of a low luminance is subtracted, and the remaining time is allocated at the ratio of the luminance weights on completion of the first step in each subfield.Type: ApplicationFiled: April 8, 2005Publication date: August 4, 2005Applicant: FUJITSU HITACHI PLASMA DISPLAYInventors: Masanori Takeuchi, Kyoji Kariya
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Patent number: 6903710Abstract: A method of driving a display device assumes a specific pixel on a retina that is formed on the retina based on an input image, and controls light emission of each subframe such that luminance of a specific pixel on the retina becomes substantially equal to luminance of a pixel corresponding to the input image. The display device is driven by constructing one frame with a plurality of subframes, for displaying the input image that moves on a display panel.Type: GrantFiled: August 16, 2001Date of Patent: June 7, 2005Assignees: Fujitsu Hitachi Plasma Display LimitedInventors: Takayuki Ooe, Toshio Ueda, Kosaku Toda, Kyoji Kariya, Shigeo Mikoshiba, Tomokazu Shiga, Makiko Yamada
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Patent number: 6879305Abstract: A PDP apparatus, the peak luminance of which has been improved with little modification of the existing circuit structure, has been disclosed, in which a thinning process that shortens an address period by hiding part of display lines in a fixed subfield of a low luminance is performed, the saved time is increased by an amount corresponding to that from which the luminance weight (the number of sustain discharge pulses, that is, the length of the sustain discharge period) of the thinned subfield of a low luminance is subtracted, and the remaining time is allocated at the ratio of the luminance weights on completion of the first step in each subfield.Type: GrantFiled: February 22, 2002Date of Patent: April 12, 2005Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Masanori Takeuchi, Kyoji Kariya
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Publication number: 20040257304Abstract: There is provided a plasma display device capable of high luminous efficacy and stable driving for displaying images at various image display load factors. The plasma display device performs the sustain discharge for a light-emission display, and is configured to apply a sustain pulse voltage between a sustain electrode pair in a respective one of the plural discharge cells to generate a sustain discharge in a respective one of the following operating modes selected based upon use of the plasma display device: (a) generating a pre-discharge and then a main discharge; (b) generating a main discharge without a pre-discharge preceding the main discharge; and (c) switching between the mode (a) and the mode (b). The sustain voltage waveforms are used which compensate for an increase in voltage drop due to an increase in discharge current when the image display load factor is excessively increased.Type: ApplicationFiled: August 28, 2003Publication date: December 23, 2004Inventors: Kenichi Yamamoto, Keizo Suzuki, Masatoshi Shiiki, Kyoji Kariya, Tomokatsu Kishi, Tetsuya Sakamoto, Takashi Sasaki, Takayuki Shimizu
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Publication number: 20030179160Abstract: A plasma display device of high luminous efficiency is provided. In a plasma display device for performing driving including at least an address period and a sustain-discharge period for emission display, the sustain-discharge period includes a pulse application period and an open period, a voltage of an electrode to which a relatively positive voltage is applied in a sustain-discharge electrode pair in a pulse application period immediately before the open period is set as Vsp, and the voltage of the other electrode is set as Vsn, Vsp−Vsn has a significantly negative value in the open period, and light is emitted by a discharge in the open period.Type: ApplicationFiled: August 14, 2002Publication date: September 25, 2003Applicants: Hitachi, Ltd., Fujitsu Hitachi Plasma Display, Ltd.Inventors: Kenichi Yamamoto, Keizo Suzuki, Hiroshi Kajiyama, Shirun Ho, Tomokatsu Kishi, Kyoji Kariya
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Patent number: 6559814Abstract: A method of displaying display data on a plasma display panel which displays odd-number lines in a plurality of sub-fields and even-number lines in a plurality of sub-fields includes the steps of checking whether the display data is computer-related data or video data. The method further includes the steps of displaying odd-number lines in a predetermined number of sub-fields during a given vertical scan cycle and even-number lines in the predetermined number of sub-fields during another vertical scan cycle if the display data is video data, and displaying odd-number lines in half the predetermined number of sub-fields and even-number lines in the remaining half of the predetermined number of sub-fields in each vertical scan cycle if the display data is computer-related data.Type: GrantFiled: July 7, 1999Date of Patent: May 6, 2003Assignee: Fujitsu LimitedInventors: Yoshikazu Kanazawa, Kyoji Kariya
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Patent number: 6529204Abstract: A method of displaying a dynamic halftone image on a display panel made of pixels divides each frame of the image into subframes and turns on and off the subframes. The method includes the steps of finding a line of pixels that simultaneously display a specific intensity level in a frame and another specific intensity level in the next frame, counting the number of pixels in the line, selecting corrective pulses, which turn on/off corresponding subframes to enable/disable corresponding intensity levels, according to the counted number and a change in the specific intensity levels between the frames, and adjusting original display signals for the pixels in the line according to the corrective pulses, respectively. The method eliminates halftone disturbance and false color contours from the image even if the moving speed of the image on the display panel is high.Type: GrantFiled: June 26, 1997Date of Patent: March 4, 2003Assignees: Fujitsu Limited, Shigeo MikoshibaInventors: Shigeo Mikoshiba, Takahiro Yamaguchi, Kosaku Toda, Tsutae Shinoda, Kyoji Kariya, Toshio Ueda
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Publication number: 20030025653Abstract: A PDP apparatus, the peak luminance of which has been improved with little modification of the existing circuit structure, has been disclosed, in which a thinning process that shortens an address period by hiding part of display lines in a fixed subfield of a low luminance is performed, the saved time is increased by an amount corresponding to that from which the luminance weight (the number of sustain discharge pulses, that is, the length of the sustain discharge period) of the thinned subfield of a low luminance is subtracted, and the remaining time is allocated at the ratio of the luminance weights on completion of the first step in each subfield.Type: ApplicationFiled: February 22, 2002Publication date: February 6, 2003Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITEDInventors: Masanori Takeuchi, Kyoji Kariya
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Patent number: 6496194Abstract: A halftone display method utilizes an activation sequence, having a plurality of luminance blocks predefined in each frame or field to display an image and having redundancy, that enables one gray-scale level to be expressed by any one of a plurality of combinations of subframes (luminance blocks). When determining luminance blocks for use to display gray scale of an arbitrary first pixel, the luminance blocks to be used for the first pixel are selected in accordance with a predetermined rule, based on how the luminance blocks are used for a second pixel located in close proximity to the first pixel. In this way, by actively utilizing the redundancy of the activation sequence, the occurrence of moving-image false contours (false color contours) in video can be minimized, and also a motion compensation equalizing pulse method can be effectively applied to further improve the image display quality.Type: GrantFiled: October 27, 1999Date of Patent: December 17, 2002Assignees: Fujitsu LimitedInventors: Shigeo Mikoshiba, Tomokazu Shiga, Yiwen Zhu, Kiyoshi Igarashi, Kosaku Toda, Toshio Ueda, Kyoji Kariya, Takayuki Ooe, Kazuki Sawa
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Publication number: 20020063729Abstract: A method of driving a display device assumes a specific pixel on a retina that is formed on the retina based on an input image, and controls light emission of each subframe such that luminance of a specific pixel on the retina becomes substantially equal to luminance of a pixel corresponding to the input image. The display device is driven by constructing one frame with a plurality of subframes, for displaying the input image that moves on a display panel.Type: ApplicationFiled: August 16, 2001Publication date: May 30, 2002Inventors: Takayuki Ooe, Toshio Ueda, Kosaku Toda, Kyoji Kariya, Shigeo Mikoshiba, Tomokazu Shiga, Makiko Yamada
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Patent number: 6278421Abstract: In a plasma display apparatus with power consumption control, a control method is provided that eliminates unnaturalness of images during power control and that holds power consumption to within a target value regardless of the type of image pattern displayed. Differences between power consumption PSA and target value PSET are summed to calculate power consumption sum value PSUM, and if PSUM is negative, brightness set value MCBC is set to its maximum value MCBCMAX. If PSUM is positive, the value calculated by the equation “MCBCMAX−PSUM×MCBCMAX/PSUM,MAX” is set as the MCBC.Type: GrantFiled: September 8, 1997Date of Patent: August 21, 2001Assignee: Fujitsu LimitedInventors: Katsuhiro Ishida, Hiroyuki Wakayama, Hirohito Kuriyama, Akira Yamamoto, Ayahito Kojima, Masaya Tajima, Kyoji Kariya
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Patent number: 6249265Abstract: An intraframe time-division multiplexing type display device prevents prominent image defects, such as flicker, and affords a high-quality image display. A single frame of an image is displayed while changing a gray-scale level thereof by means of a number of sub-frames, each sub-frame comprising at least an address period and a sustained discharge period; further, the sub-frames have respective, mutually different sustained discharge periods. A gray-scale level adjustment unit arbitrarily sets the selection sequence of each of the number of sub-frames within an individual frame that is to be in a sustained discharge state.Type: GrantFiled: November 8, 1999Date of Patent: June 19, 2001Assignee: Fujitsu LimitedInventors: Masaya Tajima, Toshio Ueda, Katsuhiro Ishida, Naoki Matsui, Kyoji Kariya, Akira Yamamoto, Hirohito Kuriyama
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Patent number: 6222512Abstract: An intraframe time-division multiplexing type display device prevents prominent image defects, such as flicker, and affords a high-quality image display. A single frame of an image is displayed while changing a gray-scale level thereof by means of a number of sub-frames, each sub-frame comprising at least an address period and a sustained discharge period; further, the sub-frames have respective, mutually different sustained discharge periods. A gray-scale level adjustment unit arbitrarily sets the selection sequence of each of the number of sub-frames within an individual frame that is to be in a sustained discharge state.Type: GrantFiled: August 23, 1996Date of Patent: April 24, 2001Assignee: Fujitsu LimitedInventors: Masaya Tajima, Toshio Ueda, Katsuhiro Ishida, Naoki Matsui, Kyoji Kariya, Akira Yamamoto, Hirohito Kuriyama
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Patent number: 6107978Abstract: A PDP driving method for more reliably lighting cells that should be lit has been disclosed. The pulse duration of a scanning pulse can be varied depending on a scan line. The pulse duration of a scanning pulse to be applied to a scan line, to which numerous cells each having a high probability of becoming a flickering missing point because a priming effect is unavailable or small are connected, is made longer than that of a scanning pulse to be applied to the other scan lines. When a cell connected to the same address line and to an immediately preceding scan line or a scan line preceding the immediately preceding scan line is unlit, the pulse duration of a scanning pulse to be applied to a cell concerned is made longer. When a whole panel is noted, a scanning pulse having a long pulse duration is applied at least to the first scan bus line. If possible, the scanning pulse having a long pulse duration is applied to the second and third scan lines.Type: GrantFiled: June 28, 1996Date of Patent: August 22, 2000Assignee: Fujitsu LimitedInventors: Keishin Nagaoka, Kyoji Kariya, Naoki Matsui, Yoshikazu Kanazawa
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Patent number: 5907316Abstract: A method displays a halftone image on a display unit by using a frame division technique that divides each frame of the halftone image into subframes each having a specific sustain discharge period to provide a specific intensity level. The method differs the position of the halftone image on the display unit from subframe to subframe in each frame. The method is capable of displaying dynamic halftone images without intensity level disturbance, smears, or false color contours.Type: GrantFiled: August 5, 1996Date of Patent: May 25, 1999Assignee: Fujitsu LimitedInventors: Shigeo Mikoshiba, Takahiro Yamaguchi, Kohsaku Toda, Tsutae Shinoda, Kyoji Kariya, Toshio Ueda, Katsuhiro Ishida