Patents by Inventor Yukari Katayama
Yukari Katayama 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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Publication number: 20080316167Abstract: A display driver driving a display panel according to inputted display data comprises: a first circuit changing brightness of a display image by conversion of the display data based on a first reference value and a second reference value, the first reference value being a display data value at a first position in an upper part of a histogram of the inputted display data, and the second reference value being a display data value at a second position in a lower portion of the histogram; a second circuit changing brightness of a illuminating device illuminating the display panel based on the first reference value; and a control circuit performing a processing of making the brightness of the display image high by the first circuit and a processing of making the brightness of the illuminating device low by the second circuit in correlation with the brightness of the display image.Type: ApplicationFiled: June 6, 2008Publication date: December 25, 2008Inventors: Yoshiki KUROKAWA, Yukari Katayama, Yasuyuki Kudo, Akihito Akai, Goki Toshima, Akihisa Aoyama
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Publication number: 20080297935Abstract: If a large minimum data unit for recorded data is used to record a small data amount of management information, the recording time is long, and furthermore when a WO (write once) is used as the recording medium, the number of recording operations which can be performed is restricted. To solve the above problems, the present invention can record data in a management area in units smaller than ordinary units for recorded data to suitably record information in a limited management area and thereby efficiently use the user data area. At that time, the present invention simplifies interleave processing usually applied to ordinary recorded data, and performs the simplified interleave processing on a data structure (for data of small size) of the present invention so as to ensure the signal processing compatibility between the ordinary data and data having the data structure according to the present invention.Type: ApplicationFiled: July 31, 2008Publication date: December 4, 2008Applicant: HITACHI, LTDInventors: Osamu KAWAMAE, Taku Hoshizawa, Harukazu Miyamoto, Shigeki Taira, Yukari Katayama
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Publication number: 20080291562Abstract: If a large minimum data unit for recorded data is used to record a small data amount of management information, the recording time is long, and furthermore when a WO (write once) is used as the recording medium, the number of recording operations which can be performed is restricted. To solve the above problems, the present invention can record data in a management area in units smaller than ordinary units for recorded data to suitably record information in a limited management area and thereby efficiently use the user data area. At that time, the present invention simplifies interleave processing usually applied to ordinary recorded data, and performs the simplified interleave processing on a data structure (for data of small size) of the present invention so as to ensure the signal processing compatibility between the ordinary data and data having the data structure according to the present invention.Type: ApplicationFiled: July 31, 2008Publication date: November 27, 2008Applicant: HITACHI, LTDInventors: Osamu KAWAMAE, Taku Hoshizawa, Harukazu Miyamoto, Shigeki Taira, Yukari Katayama
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Publication number: 20080291791Abstract: If a large minimum data unit for recorded data is used to record a small data amount of management information, the recording time is long, and furthermore when a WO (write once) is used as the recording medium, the number of recording operations which can be performed is restricted. To solve the above problems, the present invention can record data in a management area in units smaller than ordinary units for recorded data to suitably record information in a limited management area and thereby efficiently use the user data area. At that time, the present invention simplifies interleave processing usually applied to ordinary recorded data, and performs the simplified interleave processing on a data structure (for data of small size) of the present invention so as to ensure the signal processing compatibility between the ordinary data and data having the data structure according to the present invention.Type: ApplicationFiled: July 31, 2008Publication date: November 27, 2008Applicant: HITACHI, LTDInventors: Osamu KAWAMAE, Taku Hoshizawa, Harukazu Miyamoto, Shigeki Taira, Yukari Katayama
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Publication number: 20080291792Abstract: If a large minimum data unit for recorded data is used to record a small data amount of management information, the recording time is long, and furthermore when a WO (write once) is used as the recording medium, the number of recording operations which can be performed is restricted. To solve the above problems, the present invention can record data in a management area in units smaller than ordinary units for recorded data to suitably record information in a limited management area and thereby efficiently use the user data area. At that time, the present invention simplifies interleave processing usually applied to ordinary recorded data, and performs the simplified interleave processing on a data structure (for data of small size) of the present invention so as to ensure the signal processing compatibility between the ordinary data and data having the data structure according to the present invention.Type: ApplicationFiled: July 31, 2008Publication date: November 27, 2008Applicant: HITACHI, LTDInventors: Osamu Kawamae, Taku Hoshizawa, Harukazu Miyamoto, Shigeki Taira, Yukari Katayama
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Publication number: 20080272999Abstract: In a display device and a display driver, when a grayscale of a display image is equal to or lower than a specific grayscale value obtained from a histogram of the display image, a display grayscale is extended with a linear function. On the other hand, when a grayscale of a display image is equal to or higher than the specific grayscale value, histogram equalization of a part higher than the specific grayscale value is performed, and the display grayscale is extended with a non-linear function obtained from the histogram equalization.Type: ApplicationFiled: April 24, 2008Publication date: November 6, 2008Inventors: Yoshiki Kurokawa, Yukari Katayama, Hiroki Awakura, Naoki Takada, Yasuyuki Kudo, Akihito Akai, Goki Toshimi, Akihisa Aoyama, Goro Sakamaki
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Publication number: 20080191985Abstract: A luminance distribution at the highest gradation level is corrected to a curved plane luminance distribution in such a manner that the maximum gradation input to a display panel shows a curved luminance plane having the highest luminance at the center of the display panel and a lower luminance in the peripheral area of the display panel. The luminance distribution at the minimum gradation is corrected in such a manner that the minimum gradation shows a curved luminance plane having the lowest luminance at the center of the display panel and a higher luminance in the peripheral area of the display panel.Type: ApplicationFiled: December 6, 2007Publication date: August 14, 2008Inventors: Yukari Katayama, Yasuyuki Kudo, Norio Mamba, Yoshinori Tanaka
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Publication number: 20070250758Abstract: If a large minimum data unit for recorded data is used to record a small data amount of management information, the recording time is long, and furthermore when a WO (write once) is used as the recording medium, the number of recording operations which can be performed is restricted. To solve the above problems, the present invention can record data in a management area in units smaller than ordinary units for recorded data to suitably record information in a limited management area and thereby efficiently use the user data area. At that time, the present invention simplifies interleave processing usually applied to ordinary recorded data, and performs the simplified interleave processing on a data structure (for data of small size) of the present invention so as to ensure the signal processing compatibility between the ordinary data and data having the data structure according to the present invention.Type: ApplicationFiled: July 6, 2007Publication date: October 25, 2007Applicant: HITACHI, LTD.Inventors: Osamu Kawamae, Taku Hoshizawa, Harukazu Miyamoto, Shigeki Taira, Yukari Katayama
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Patent number: 7281194Abstract: If a large minimum data unit for recorded data is used to record a small data amount of management information, the recording time is long, and furthermore when a WO (write once) is used as the recording medium, the number of recording operations which can be performed is restricted. To solve the above problems, the present invention can record data in a management area in units smaller than ordinary units for recorded data to suitably record information in a limited management area and thereby efficiently use the user data area. At that time, the present invention simplifies interleave processing usually applied to ordinary recorded data, and performs the simplified interleave processing on a data structure (for data of small size) of the present invention so as to ensure the signal processing compatibility between the ordinary data and data having the data structure according to the present invention.Type: GrantFiled: June 21, 2005Date of Patent: October 9, 2007Assignee: Hitachi, Ltd.Inventors: Osamu Kawamae, Taku Hoshizawa, Harukazu Miyamoto, Shigeki Taira, Yukari Katayama
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Publication number: 20070195028Abstract: A display device in which one frame period is divided to a plurality of field periods, it is made possible to set gray scale voltage groups of a plurality of kinds depending on the field period, and a gray scale voltage is equipped with a function of generating and outputting gray scale voltage groups of different kinds according to the field period.Type: ApplicationFiled: November 30, 2006Publication date: August 23, 2007Inventors: Yukari Katayama, Yasuyuki Kudo, Toshimitsu Matsudo
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Publication number: 20070132703Abstract: To take aim at low power consumption when controlling display/non-display in an arbitrary area.Type: ApplicationFiled: December 13, 2006Publication date: June 14, 2007Inventors: Hiroko Sehata, Hiroaki Asuma, Atsushi Hasegawa, Norio Mamba, Yukari Katayama
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Patent number: 7216286Abstract: In encoding digital data, scrambling is executed after error correction encoding is completed. In decoding digital data, error correction processing is executed after descrambling is completed. In the error correction processing, after syndrome calculation is performed, syndrome s0 is used to determine the location and value of an error; the error value is subtracted from each syndrome value; and the result is divided by a fixed value. This process realizes a digital data encoding and decoding system providing substantially the same correcting ability as a conventional process except that error propagation occurs through descrambling.Type: GrantFiled: December 26, 2003Date of Patent: May 8, 2007Assignee: Hitachi, Ltd.Inventors: Taku Hoshizawa, Yukari Katayama
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Publication number: 20070091050Abstract: In a display device using an RGB time division drive system in which RGB data to be supplied to display pixels of three colors RGB are subjected to time-division multiplexing and input to a liquid crystal panel unit, (1) data are input to the liquid crystal panel unit alternately in the order of RGB and BGR every line signal, and a selection signal SC which is in the on-state at a break of one line period is kept in the on-state until the next line period. In addition, (2) over a partial non-display period in partial display, selection signals SA, SB and SC are always in the off-state and an equalize signal EQG is in the on-state.Type: ApplicationFiled: October 20, 2006Publication date: April 26, 2007Inventors: Yukari Katayama, Yasuyuki Kudo, Norio Mamba, Toshimitsu Matsudo
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Publication number: 20070043996Abstract: A data allocator allocates (N×kV×kH)-byte source data distributively in N (kV bytes×kH bytes) two-dimensional arrays and sends the data to a V coder and an H coder. The V coder codes each column of the two-dimensional arrays according to an (nV, kV) code V, and the H coder codes each row of the two-dimensional arrays according to an (nH, kH) code H. The V and H coders send redundant data to a data allocator. The data allocator allocates the redundant data in a memory to obtain N (nV bytes×nH bytes) product-code codewords and outputs each row of the product-code codewords in an alternating manner for the N product-code codewords.Type: ApplicationFiled: September 28, 2006Publication date: February 22, 2007Applicant: Hitachi, Ltd.Inventors: Shigeki Taira, Takeshi Maeda, Harukazu Miyamoto, Yukari Katayama
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Patent number: 7155015Abstract: In the optical disk apparatus, an arbitrary seed data for randomizing is added to an original data to be recorded on a disk. One-bit randomizing data is determined by operation using one-bit original data or seed data, and plural-bit past randomized data. At the time of descrambling, descrambling is performed without seed data.Type: GrantFiled: March 20, 2001Date of Patent: December 26, 2006Assignee: Hitachi, Ltd.Inventors: Yukari Katayama, Takeshi Maeda, Shigeki Taira, Harukazu Miyamoto, Osamu Kawamae
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Publication number: 20060248427Abstract: A random seed scramble for preventing the deterioration of a medium is applied to the next generation optical disk. A seed is stored to a BIS area. ID or an EDC is checked to hold interchangeability before and after scramble release. When no error is generated in data before the scramble release, it is recognized as an unscrambled disk. In contrast to this, when no error is generated in data after the scramble release, it is recognized as a scrambled disk. An information storing area showing an area to be rewritten by performing the scramble and an area to be rewritten without performing the scramble is arranged.Type: ApplicationFiled: June 20, 2006Publication date: November 2, 2006Inventors: Yukari Katayama, Takeshi Maeda, Harukazu Miyamoto, Takushi Nishiya, Takatoshi Kato, Shigeki Taira, Osamu Kawamae, Taku Hoshizawa
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Patent number: 7124344Abstract: A data allocator allocates (N×kV×kH)-byte source data distributively in N (kV bytes×kH bytes) tw0-dimensional arrays and sends the data to a V coder and an H coder. The V coder codes each column of the tow-dimensional arrays according to an (nV, kV) code V, and the H coder codes each row of the two-dimensional arrays according to an (nH, kH) code H. The V and H coders send redundant data to a data allocator. The data allocator allocates the redundant data in a memory to obtain N (nV bytes×nH bytes) product-code codewords and outpouts each row of the product-code codewords in an alternating manner for the N product-code codewords.Type: GrantFiled: September 27, 2001Date of Patent: October 17, 2006Assignee: Hitachi, Ltd.Inventors: Shigeki Taira, Takeshi Maeda, Harukazu Miyamoto, Yukari Katayama
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Publication number: 20060059528Abstract: A display system provided with transportability and being accessible from a mobile information terminal, a wireless communication network connects between a server 101 and a display device 102 and between the display device 102 and other display devices in tandem. Each display device has an interface for connecting with a mobile information terminal. The communication interface between each display device and the server or another display device uses one protocol for larger-capacity communication at a higher frequency band than that for the wireless communication interface between each display device and a mobile information terminal.Type: ApplicationFiled: September 30, 2003Publication date: March 16, 2006Applicant: HITACHI, LTD.Inventors: Yukari Katayama, Shinya Iguchi, Tsutomu Furuhashi
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Publication number: 20050229082Abstract: If a large minimum data unit for recorded data is used to record a small data amount of management information, the recording time is long, and furthermore when a WO (write once) is used as the recording medium, the number of recording operations which can be performed is restricted. To solve the above problems, the present invention can record data in a management area in units smaller than ordinary units for recorded data to suitably record information in a limited management area and thereby efficiently use the user data area. At that time, the present invention simplifies interleave processing usually applied to ordinary recorded data, and performs the simplified interleave processing on a data structure (for data of small size) of the present invention so as to ensure the signal processing compatibility between the ordinary data and data having the data structure according to the present invention.Type: ApplicationFiled: June 21, 2005Publication date: October 13, 2005Applicant: HITACHI, LTD.Inventors: Osamu Kawamae, Taku Hoshizawa, Harukazu Miyamoto, Shigeki Taira, Yukari Katayama
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Patent number: RE39253Abstract: Apparatus for recording and/or reproducing user data recorded on a record medium. The apparatus includes record encoder for converting original user data into encoded user data of a predetermined record code and as error correcting code generator for generating original error correcting code data for correcting an error with respect to the encoded user data. A write unit records the encoded user data and the error correcting code on the record medium. A read unit reads the recorded data and the reproduced data is error corrected so as to provide the original user data.Type: GrantFiled: June 22, 2000Date of Patent: August 29, 2006Assignee: Hitachi, Ltd.Inventors: Yukari Katayama, Yukie Miyazawa, Hitoshi Ogawa, Masatoshi Nishina, Shoichi Miyazawa