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公开(公告)号：BR8705443A
公开(公告)日：1988-05-24
申请号：BR8705443
申请日：1987-10-13
Applicant: IBM
Inventor： MOREL JEANNE E , RACKLEY DARWIN P , TRYNOSKY STEPHEN W , WALL WILLIAM A
Abstract: An all points addressable raster scan graphics display system is operable in two modes. In the first mode, data is extracted from a refresh store, serialised, modified, and applied to a display device at a first frequency. In the second mode, data is extracted from the refresh store, serialised and partially modified at said first frequency, but it is then further modified and passed to the display device at an even sub harmonic, for example half, of the first frequency. The further modification includes concatenation of successive groups of display data bits. Accordingly, with the raster scan device operating at a constant scan velocity, the first mode provides a high picture element definition but relatively low colour definition display, and the second mode provides a display with an even submultiple, for example half, the picture element definition but considerably greater colour definition.
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公开(公告)号：CA1292335C
公开(公告)日：1991-11-19
申请号：CA547745
申请日：1987-09-24
Applicant: IBM
Inventor： MOREL JEANNE E , RACKLEY DARWIN P , TRYNOSKY STEPHEN W , WALL WILLIAM A
Abstract: RASTER SCAN DIGITAL DISPLAY SYSTEM An all points addressable raster scan graphics display system is operable in two modes. In the first mode, data is extracted from a refresh store, serialized, modified, and applied to a display device at a first frequency. In the second mode, data is extracted from the refresh store, serialized and partially modified at said first frequency, but it is then further modified and passed to the display device at an even sub harmonic, for example half, of the first frequency. The further modification includes concatenation of successive groups of display data bits. Accordingly, with the raster scan device operating at a constant scan velocity, the first mode provides a high picture element definition but relatively low color definition display, and the second mode provides a display with an even submultiple, for example half, the picture element definition but considerably greater color definition.
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公开(公告)号：CA1235537A
公开(公告)日：1988-04-19
申请号：CA481698
申请日：1985-05-16
Applicant: IBM
Inventor： RACKLEY DARWIN P , SAENZ JESUS A , YOSIM PAUL S
Abstract: DIGITAL DISPLAY SYSTEM A digital display system includes a monitor arranged to receive digital display data and synchronizing signals to develop displays on a cathode ray tube. The monitor is switched between different line structure and/or color definition modes in response to the polarity of one of the vertical or horizontal synchronizing signals trains. A circuit receives this train to provide control signals to the horizontal time base and/or a color signal code converter. The time base control signal, in accordance with its binary value, controls the frequency of the time base. The color converter, in response to the control signals, either passes color signals received in parallel over six input lines without change to the cathode ray tube drive circuits or converts color signals on four of the input lines to output signals on the six lines to the drive circuits.
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公开(公告)号：BR9301306A
公开(公告)日：1993-10-05
申请号：BR9301306
申请日：1993-03-25
Applicant: IBM
Inventor： AOKI YUTAKA , GOHDA YUJI , RACKLEY DARWIN P
Abstract: The present invention provides means for increasing the rate at which run length records are decoded and the decoded run length codes are written into a bit map memory of a data processing system. At the time when decoded data is written into the bit map memory, a predetermined code in a flow of run length code data causes the address point in the bit map memory at which the data is to be written to be moved by a predetermined range, the data within the range skipped by the address point remaining unchanged. By this technique the number of write operations to the bit map memory is decreased.
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公开(公告)号：BR9100844A
公开(公告)日：1991-11-05
申请号：BR9100844
申请日：1991-03-01
Applicant: IBM
Inventor： LUCAS BRUCE DAVID , RACKLEY DARWIN P , SAENZ JESUS ANDRES
Abstract: Method and apparatus for converting multibit pixel data to a lesser number of bit pixel data and re-expanding the compressed data. Luminance data for each pixel is established as the 5 most significant bits of the original luminance signal. The chrominance information for groups of pixels is subsampled, and a common chrominance value assigned to each of the pixels in a group. The resulting compressed pixels may be 8 bits wide providing economical possibilities to store the 8 bit wide data. The data is expanded for display by adding lower order data bits to the compressed luminance signal data bits. A subsampled chrominance data signal is appended to the expanded luminance data for display.
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Patent Agency Ranking
公开(公告)号：AU539297B2
公开(公告)日：1984-09-20
申请号：AU7085481
申请日：1981-05-20
Applicant: IBM
Inventor： RACKLEY DARWIN P , SCHNEIDER TIMOTHY L , WOODWARD MILTON H
Abstract: A facsimile system is so controlled as to reduce four successively scanned source documents and print all four reduced copies on a single copy page. The system prints one of the source documents (44) in each quadrant of the copy document. The images are reduced in the horizontal dimension by discarding every other picture element in the scan image and in the vertical dimension by increasing the speed of the scanner (40) so that the size of the picture element in the vertical dimension is doubled. At the receiver, two scanned and reduced images will be printed on the left-hand half of the copy document (12). Subsequently, two additional scanned and reduced images are printed on the right-hand half of the copy document. When printing the right-hand half of the copy document, the printer is controlled to start printing at the horizontal mid-page of the copy document rather than the left-hand edge of the copy document.
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公开(公告)号：PH30720A
公开(公告)日：1997-10-02
申请号：PH49619
申请日：1994-12-19
Applicant: IBM
Inventor： RACKLEY DARWIN P , WEST R MICHAEL P
Abstract: Apparatus is provided for adjusting the color of the sprite in display systems, so that the sprite is always distinctively visible irrespective of the underlying displayed data. A palette DAC 322 of a display system is provided with sprite control logic, which determines the color of a sprite to be overlaid on an image displayed on a video display unit 236 of a display system by inverting only the most significant bit (MSB) of each of the red, green and blue pixel data components of the underlying image. In a preferred embodiment, the sprite control logic circuit comprises first, second and third multiplexors (MUXes) 420, 422, 424 each having a first input connected to receive the MSB of the red, green and blue pixel data components of the underlying image, respectively, and a second input connected to receive the output of first, second and third XOR gates, respectively. Each of the first, second and third XOR gates similarly have a first input connected to receive the MSB of the red, green and blue pixel data components of the underlying image, respectively, and a second input connected to receive sprite data from a sprite RAM 324, which sprite data represents a sprite character to be overlaid on the displayed image.
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公开(公告)号：CA1224291A
公开(公告)日：1987-07-14
申请号：CA457026
申请日：1984-06-20
Applicant: IBM
Inventor： KUMMER DAVID A , RACKLEY DARWIN P , SAENZ JESUS A
Abstract: RASTER SCAN DISPLAY SYSTEM A raster scan display system includes a plurality of storage maps. These maps are addressable in either of two modes. In the first mode each map contains bit mapped data and the maps are addressed together to provide color signals from which color video signals are derived. In the second mode, one map contains character representing data and a further map, character display dot patterns. In this mode the first map is addressed to provide partial addresses for the further map. These partial addresses are combined with row scan data signals to access the further map from which the character display dot data is used to generate the video signals.
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公开(公告)号：AU4254985A
公开(公告)日：1986-01-23
申请号：AU4254985
申请日：1985-05-16
Applicant: IBM
Inventor： RACKLEY DARWIN P , SAENZ JESUS A , YOSIM PAUL S
IPC: G09G5/18 , G06F3/153 , G09G1/16 , G09G1/28 , G09G5/00 , G09G5/02 , G09G5/04 , G09G5/36 , H04N3/27 , H04N3/32 , H04N5/46
Abstract: A digital display system includes a monitor arranged to receive digital display data and synchronising signals to develop displays on a cathode ray tube. The monitor is switched between different line structure and/or colour definition modes in response to the polarity of one of the vertical or horizontal synchronising signals trains. A circuit receives this train to provide control signals to the horizontal time base and/or a colour signal code converter. The time base control signal, in accordance with its binary value, controls the frequency of the time base. The colour converter, in response to the control signals, either passes colour signals received in parallel over six input lines without change to the cathode ray tube drive circuits or converts colour signals on four of the input lines to output signals on the six lines to the drive circuits.
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公开(公告)号：CA1173950A
公开(公告)日：1984-09-04
申请号：CA374623
申请日：1981-04-03
Applicant: IBM
Inventor： RACKLEY DARWIN P , SCHNEIDER TIMOTHY L , WOODWARD MILTON H
Abstract: MULTIPLE IMAGE FACSIMILE The apparatus shown herein controls a facsimile system to reduce four source documents and print all four reduced copies on a single copy page. The facsimile system prints one of the source documents in each quadrant of the copy document. The images of the source documents are reduced in the horizontal dimension by discarding every other picture element in the scan image. The images are reduced in the vertical dimension by increasing the scanner speed so that the size of the picture element in the vertical dimension is doubled. At the receiver, two scanned and reduced images will be printed on the left-hand half of the copy document. Subsequently, two additional scanned and reduced images are printed on the right-hand half of the copy document When printing the right-hand half of the copy document, the printer must be referenced to start printing at the horizontal mid-page of the copy document rather than the left-hand edge of the copy document.
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