Patents Assigned to IBM
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Patent number: 6307883Abstract: The subject invention improves tracking performance of an adaptive equalizing operation while reducing the calculation volume. A frame including a training sequence and a mixed data sequence in which at least one symbol of a whitened sequence is dispersively inserted into a data sequence is generated. The frame is converted into a wireless signal, which is then transmitted. The wireless signal of the frame is received. Tap coefficients of an equalization filter are set by using the training sequence in the frame. During reception of the mixed data sequence, an adaptive operation is performed by using the respective symbols of the whitened sequence in the frame and the tap coefficients of the equalization filter are updated.Type: GrantFiled: May 8, 1997Date of Patent: October 23, 2001Assignee: IBM CorporationInventors: Yoshihisa Kanada, Hiroshi Ishikawa
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Publication number: 20010024181Abstract: A liquid crystal display comprises an input for inputting a video signal from a host and a storage medium for storing the previous brightness level of the video signal input through the input. A determinator is provided for determining an output brightness level based on the previous brightness level stored in the storage medium and the next brightness level of the next video signal input to the input, so as to make the time integration quantity of a brightness change substantially equal to an ideal quantity of light in a stationary state with respect to the next brightness level. Further included are drivers for driving an image displaying liquid crystal cell based on the output brightness level determined by the determinator.Type: ApplicationFiled: January 12, 2001Publication date: September 27, 2001Applicant: IBMInventors: Tetsu Kubota, Akihiro Funakoshi, Takuya Ishikawa
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Publication number: 20010017845Abstract: Methods and apparatus are provided for generating a set of restrictive costs associated with directional paths between selected nodes in a group of nodes of a network system wherein each node in the group is connected by a link to at least one other node in the group, and each link has a pair of directional costs associated therewith such that each link can be considered as a pair of oppositely-directed, unidirectional links each of which extends from a source node to a destination node and has a said directional cost associated therewith. The method allows asymmetric costs, rather than merely symmetric costs, to be considered, and can be applied, for example, to generate the transition matrix for a PNNI peer group.Type: ApplicationFiled: January 27, 2001Publication date: August 30, 2001Applicant: IBM CorporationInventor: Daniel Bauer
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Patent number: 6272492Abstract: A system and method for system for electronic communication, in which functional enhancements may be added that require no modification or replacement of the content-storing servers and is transparent to web browser software. The system includes a front-end proxy server and at least one back-end server. The front-end proxy server receives a content request from a user system, processes the content request, and transmits the processed content request to a back-end server. The front-end proxy server receives a content item corresponding to the processed content request from the back-end server and transmits the content item to the user system. The back-end server comprises a content storage device containing a plurality of content items. The back-end server receives processed content requests from the front-end proxy server, retrieves a content item corresponding to the content request and transmits the retrieved content item to the front-end proxy server.Type: GrantFiled: November 21, 1997Date of Patent: August 7, 2001Assignee: IBM CorporationInventor: Jeffrey Brian Kay
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Patent number: 6256628Abstract: A method of displaying clustered data points in detail and in context within a data set. The method includes the step of identifying one or more clustered sets of data points within a data set. The data set includes a plurality of data points. The method also includes the steps of determining a respective data range segment for each cluster of data points, where each data range segment has a boundary and a scale interval, and displaying the data points in each segment such that each segment is mutually distinguishable. Where two or more data range segments are determined, the scale interval value for one of the data range segments is modifiable to differ from one or more of the other data range segments.Type: GrantFiled: June 24, 1998Date of Patent: July 3, 2001Assignee: IBM CorporationInventors: Adam Alexander Dobson, Roland Albert Merrick
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Patent number: 6255599Abstract: The present invention discloses techniques that improve the reliability of a flip packages that uses underfill encapsulation. One embodiment of the present invention describes a method and apparatus of packaging a flip chip by relocating the neutral plane of the package substrate away from its mid-plane. Another embodiment of the present invention describes a method and apparatus of arranging the layers of a laminate for use in PBGA packaging that arranges the layers of the laminate according to the stiffness of each layer. Another embodiment of the present invention describes a method and apparatus of packaging a flip chip that uses one or more redundant interconnections at the bottom of the package substrate where the redundant interconnections are within the shadow of the IC chip.Type: GrantFiled: August 18, 1997Date of Patent: July 3, 2001Assignee: IBMInventors: Chi Shih Chang, William T. Chen, Ajit Trivedi
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Patent number: 6239851Abstract: The purpose of the invention is to provide a light guide of a variety of forms having a uniform distribution of brightness in the plane and a planer light source device for a liquid crystal display device which uses such light guide. The light guide comprises a first surface which is a surface to which a natural polarization light is incident and a second surface other than the first surface which is an exit surface of a specific polarization light into which, said natural polarization light is modulated, wherein; said light guide has an interface of two materials of different indices of refraction oriented at an angle of &thgr;B+/−&agr; degrees relative to the primary propagation direction of said incident light, said &thgr;B being an angle satisfying Brewster's condition, more than two orientations of said interface exist in a single light guide, and the difference between the indices of refraction of the two materials of different indices of refraction is between 0.001 and 1.0.Type: GrantFiled: July 6, 1998Date of Patent: May 29, 2001Assignees: IBM Corporation, Sekisui Kagaku Kogyo KabushikiInventors: Tsuyonobu Hatazawa, Hideki Hayashi, Kozo Nakamura, Takashi Watanabe, Johji Mamiya, Masaru Suzuki, Hiroshi Tanase
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Publication number: 20010001879Abstract: A serializable object, formed by a device driver and containing characteristics (device state) of the device, is held by a device driver and made known to a data processing system's power manager. The power manager provides a device driver independent mechanism for saving device state by retrieving each device driver's object containing device state and storing the object in a location that provides for efficient and quick retrieval. The power manager, being aware of power levels for all devices on the system, may determine where, how and when to store objects retrieved from the device drivers for most efficient retrieval. Upon receiving an interrupt indicating the system should power up, the serializable objects are retrieved by the power manager and restored to each device driver.Type: ApplicationFiled: November 12, 1998Publication date: May 24, 2001Applicant: IBM CORPORATIONInventors: JOSEPH KUBIK, MARK DANIEL ROGALSKI, JOEL L. SMITH
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Patent number: 6219110Abstract: Light emitted from a white light source is separated into red, green and blue light beams by dichroic mirrors. The resulting light beams are directed onto a lenticular lens system having large-pitch lenticular lenses and small-pitch lenticular lenses formed on opposed surfaces. This lens system converts the red, green and blue light beams incident on each of the large-pitch lenticular lenses into a color band set consisting of a set of separated subbands of the red, green and blue light beams the diameter of which is narrowed down to one-third or less of that of the incident light beam through the small-pitch lenticular lenses. The resulting color band sets emerging from the small-pitch lenticular lenses are focused onto a DMD panel through a mirror galvanometer and a coupling lens. The mirror galvanometer is rotated in such a way as to move the color band sets over the DMD panel up and down by the amount corresponding to the pitch of the color band sets while the DMD panel is being driven.Type: GrantFiled: November 2, 1999Date of Patent: April 17, 2001Assignees: IBM Japan, Ltd., Advanced Peripherals Technologies Inc.Inventors: Yoshimoto Ishikawa, Mitsuo Harahata, Akinori Kaneko
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Patent number: 6203965Abstract: The invention provides new photoresist compositions that contain a resin binder and a blend of photoacid generators. Photoacid generator blends of the invention produce photoacids that differ in acid strength and/or size. A specific composition comprises a terpolymer having units of hydroxystyrene, styrene and t-butyl acrylate with the photoacid generators di-(4-tbutylphenyl)iodonium camphorsulfonate and di-(4-t-butylphenyl)iodonium o-trifluoromethylbenzene sulfonate.Type: GrantFiled: April 19, 2000Date of Patent: March 20, 2001Assignees: Shipley Company, L.L.C., IBM CorporationInventors: James F. Cameron, James Michael Mori, George W. Orsula, James W. Thackeray, Wu-Song Huang, Ronald A. DellaGuardia, Kuang-Jung Chen, Hiroshi Ito, Wayne M. Moreau
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Patent number: 6182123Abstract: A distributed processing, interactive computer network and method of operation is described. The network is designed to provide very large numbers of simultaneous users access to large numbers of applications which feature interactive text/graphic sessions. The network includes one or more host computers having application data stores; a plurality of concentrator computers, also including application data stores, the concentrator computers being connected in groups of one of more to each of the host computers; and a plurality of reception system computers connected in groups of one or more to each of the concentrator computers, the reception system computers being arranged so that respective users can request interactive applications at the reception system computers. In accordance with the design, the reception system computers also include application data stores.Type: GrantFiled: September 18, 1997Date of Patent: January 30, 2001Assignee: IBM Corp.Inventors: Robert Filepp, Michael L. Gordon, Alexander W. Bidwell, Francis C. Young, Allan M. Wolf, Sam Meo, Duane Tiemann, Lawrence Abrahams, Michael J. Silfen, Aldo R. Dalsass, Florence M. Lee, Kenneth H. Appleman
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Patent number: 6161104Abstract: The invention provides a digital data processing system with improved access to information stored on a peripheral device. The system has a plurality of nodes, a peripheral device, a file system and a bypass mechanism. A first node (e.g., a client node) is connected to a second node (e.g., a server node) over a first communications pataway (e.g., a network). The second node is itself connected to a peripheral device (e.g., a disk drive) over a second communications pathway. The first node, too, is connected to the peripheral device over a third communications pathway. The file system, executing on the first and second nodes, is capable of responding to access requests generated by the first node for transferring data between that node and the peripheral device, via the second node and via the first and second communications pathways. The file system also maintains administrative information pertaining to storage on the peripheral device of data designated by such requests.Type: GrantFiled: May 11, 1999Date of Patent: December 12, 2000Assignee: IBM CorporationInventors: Christopher J. Stakutis, Kevin M. Stearns
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Patent number: 6124906Abstract: The invention is intended to reduce the weight of the entire unit, make it compact and prevent the emitted light from being in dark and bright stripes in a light guide unit for a back light of a liquid crystal display device. Further, this invention allows a prism sheet having a larger apex angle to be used. To this end, the light guide unit comprises a plurality of light guide films laminated on the light guide member. The sloped surface which is opposite to the incident surface of the light guide unit is formed with grooves each having an inclination of an angle related to Brewster angle. A prism sheet is further disposed with the side having apexes oriented to the light guide unit to deflect the light emitted from the light guide unit.Type: GrantFiled: September 11, 1998Date of Patent: September 26, 2000Assignees: IBM Corporation, Stanley Electric Co., Ltd.Inventors: Koji Kawada, Yoji Oki, Masaru Suzuki, Yoshiteru Watanabe
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Patent number: 6118503Abstract: A polarized component is obtained with a high conversion efficiency in a light guide which produces one of the polarized components by having it transmitted. The light from a light source is incident to a light guide which comprises a plurality of light guide layers and reflected by the end surface to an interface between the light guide layers. The polarized component transmitting through the end surface is rotated in its polarization plane by a wave length plate and reflected by a reflecting plate for reentrance to the light guide at the end surface of the light guide toward the interface. The reentering light mostly transmits through the interface because the polarization plane is rotated. A reflected light polarized component is returned to the wave length plate and the reflecting plate, and directed back to the interface again. The polarized component transmitting through the interface is similarly transmitted and reflected in the next interface.Type: GrantFiled: September 20, 1999Date of Patent: September 12, 2000Assignees: Stanley Electric Co., Ltd., IBMInventors: Yoji Oki, Koji Kawada, Masaru Suzuki
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Patent number: 6044488Abstract: The method is intended for the generation of a check word for a bit string to check the integrity and authenticity of the bit string, the bit string comprising at least one data set consisting of a plurality of data words, each having the same word length defined by a number of bits. Here, a random number is generated for each data word, the number having the same number of bits as the data words. Further, first and second operand pairs are generated, each consisting of a data word and a random number. The data word and the random number of each first operand pair are subjected to a first linking operation, while the data word and the random number of each second operand pair is subjected to a second linking operation. The results of all operations applied to the first and second operand pairs are linked, the result of this linking being the check word of this data set.Type: GrantFiled: December 16, 1997Date of Patent: March 28, 2000Assignee: IBMInventor: Jochen Liedtke
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Patent number: 6042997Abstract: The present invention provides novel copolymers and photoresist compositions that contain such copolymers as a resin binder component. Preferred copolymers include three distinct repeating units: 1) units that contain acid-labile groups; 2) units that are free of both reactive and hydroxy moieties; and 3) units that contribute to aqueous developability of a photoresist containing the copolymer as a resin binder. Photoresists of the invention exhibit surprising lithographic improvements including substantially enhanced plasma etch resistance and isolated line performance as well as good dissolution rate control.Type: GrantFiled: January 23, 1998Date of Patent: March 28, 2000Assignees: IBM Corporation, Shipley Company, L.L.C.Inventors: George G Barclay, Michael F. Cronin, Ronald A. Dellaguardia, James W. Thackeray, Hiroshi Ito, Greg Breyta
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Patent number: 5996074Abstract: Apparatus for configuring a computer system is adapted to allow configuration to occur on the system unit without removing the system unit from its packaging. By so preparing and operating the unit that it can function to a degree as a network client, it is possible to perform steps for configuring "in the package" that violate normal self test expectations. With this abnormal operating environment and operation the system is placed in condition to be removed from the packaging at the user's location with BIOS and program image customized for the user. This approach provides a freshly configured system and yet eliminates unpacking at a configuration center and then repacking for transfer to the user or the need for refresh configuration at the user site as the system unit is set up for normal use.Type: GrantFiled: November 15, 1997Date of Patent: November 30, 1999Assignee: IBM International Business Machines CorporationInventors: Keith Coleman Houck, David B. Rhoades, John Joseph Edward Turek
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Patent number: 5996057Abstract: The data processing system of the present invention loads three input operands, including two input vectors and a control vector, into vector registers and performs a permutation of the two input vectors as specified by the control vector, and further stores the result of the operation as the output operand in an output register. The control vector consists of sixteen indices, each uniquely identifying a single byte of input data in either of the input registers, and can be specified in the operational code or be the result of a computation previously performed within the vector registers. The specification of the control vector allows a vector-matrix operation to be performed on the input vectors by rearranging or replicating the input operand bytes in the bytes of the output register as a function of the control vector.Type: GrantFiled: April 17, 1998Date of Patent: November 30, 1999Assignees: Apple, IBM, Motorola Inc.Inventors: Hunter Ledbetter Scales, III, Keith Everett Diefendorff, Brett Olsson, Pradeep Kumar Dubey, Ronald Ray Hochsprung
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Patent number: 5949058Abstract: A magnetic card is set to an exclusive cardholder and inserted into a passbook printer. The passbook printer can read a magnetic stripe of a passbook and print the passbook or a document. The cardholder is fed by a feed roller or the like. Control device can detect the length of the cardholder by an insertion slot sensor. The control device adjusts the position of a magnetic stripe to the position of a magnetic head by the feed roller and the magnetic stripe is read by the magnetic head. The control device decides whether the read data is the data in the magnetic card or the data in the passbook in accordance with the format of the read data.Type: GrantFiled: March 6, 1997Date of Patent: September 7, 1999Assignee: IBM CorporationInventor: Hiroshi Kimura
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Patent number: D440489Type: GrantFiled: April 25, 2000Date of Patent: April 17, 2001Assignee: IBM Japan Business Logistics Co., Ltd.Inventors: Hideo Igami, Yuhta Ishii