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Darwin P Rackley

from Cary, NC
Age ~73
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Also known as:
Darwin P Rackely
Phone and address:
108 N Coslett Ct, Cary, NC 27513
(919) 656-7769
Related to:
Bryce Jameson RackleyKim Carter, 53Cara Mathews, 38Chandra Matthews, 63Rohinie MatthewsLewis Carter, 54
Connected to:
Cathy P Rackley, 58Connie L Rackley, 75Connor E Rackley, 28Daniel L Rackley, 59Dewey Rackley, 72Felicia A Rackley, 50Ian Rackley, 32Krystal Rackley, 36Samuel R Rackley, 40Sherry H Rackley, 72

Darwin Rackley Phones & Addresses

  • 108 N Coslett Ct, Cary, NC 27513 (919) 656-7769
  • Boca Raton, FL
  • 108 N Coslett Ct, Cary, NC 27513

Work

Position: Professional/Technical

Education

Degree: Associate degree or higher

Skills

Patents • Cloud Computing • Start-ups • IP • Middleware • Product Management • Product Development • Software Development • Embedded Systems • Program Management • Licensing

Industries

Information Technology and Services

Resumes

Resumes

Darwin Rackley Photo 1

Ip Consulting

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Location:
Raleigh-Durham, North Carolina Area
Industry:
Information Technology and Services
Skills:
Patents
Cloud Computing
Start-ups
IP
Middleware
Product Management
Product Development
Software Development
Embedded Systems
Program Management
Licensing

Publications

Us Patents

Digital Display System

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US Patent:
47273623, Feb 23, 1988
Filed:
Jul 16, 1984
Appl. No.:
6/631043
Inventors:
Darwin P. Rackley - Boca Raton FL
Jesus A. Saenz - Coral Springs FL
Paul S. Yosim - Delray Beach FL
Assignee:
International Business Machines Corporation - Armonk NY
International Classification:
G09G 116
US Classification:
340703
Abstract:
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.

Method And Means For Fast Writing Of Run Length Coded Bit Strings Into Bit Mapped Memory And The Like

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US Patent:
54229952, Jun 6, 1995
Filed:
Mar 16, 1993
Appl. No.:
8/032084
Inventors:
Yutaka Aoki - Fujisawa, JP
Yuji Gohda - Himeji, JP
Darwin P. Rackley - Boca Raton FL
Assignee:
International Business Machines Corporation - Armonk NY
International Classification:
G06F 1520
US Classification:
395162
Abstract:
A method and means which upon detecting indicia embedded in a decoded run length coded bit string skips over a range of bit memory mapped addresses thus reducing the number of write operations into a counterpart bit mapped memory. The coded indicia include portions which specify a skip and a skip range for storage locations in said bit mapped memory.

Apparatus And Method For Compressing And Expanding Multibit Digital Pixel Data

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US Patent:
50814508, Jan 14, 1992
Filed:
Mar 9, 1990
Appl. No.:
7/491370
Inventors:
Bruce D. Lucas - Yorktown Heights NY
Darwin P. Rackley - Boca Raton FL
Jesus A. Saenz - Greenwich CT
Assignee:
International Business Machines Corporation - Armonk NY
International Classification:
G09G 500
US Classification:
340728
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.

Hardware Xor Sprite For Computer Display Systems

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US Patent:
54715709, Nov 28, 1995
Filed:
Dec 30, 1993
Appl. No.:
8/176128
Inventors:
Darwin P. Rackley - Boca Raton FL
R. Michael P. West - Colchester VT
Assignee:
International Business Machines Corporation - Armonk NY
International Classification:
G06T 1100
US Classification:
395135
Abstract:
Method and apparatus 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 of a display system is provided with sprite control logic, which derives the color of a sprite to be overlaid on an image displayed on a video display unit 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) 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, which sprite data represents a sprite character to be overlaid on the displayed image.

Raster Scan Digital Display System

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US Patent:
49010620, Feb 13, 1990
Filed:
Dec 6, 1988
Appl. No.:
7/282919
Inventors:
Jeanne E. Morel - Boca Raton FL
Darwin P. Rackley - Boca Raton FL
Stephen W. Trynosky - Boca Raton FL
William A. Wall - Boca Raton FL
Assignee:
International Business Machines - Armonk NY
International Classification:
G09G 102
G09G 128
US Classification:
340703
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, 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.

Digital Display System

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US Patent:
RE339164, May 5, 1992
Filed:
Nov 30, 1989
Appl. No.:
7/443187
Inventors:
Jesus A. Saenz - Greenwich CT
Paul S. Yosim - Boca Raton FL
Darwin P. Rackley - Boca Raton FL
Assignee:
International Business Machines Corporation - Armonk NY
International Classification:
G09G 116
US Classification:
340703
Abstract:
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.

Ram Based Yuv-Rgb Conversion

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US Patent:
58725563, Feb 16, 1999
Filed:
Apr 6, 1993
Appl. No.:
8/043320
Inventors:
Darwin Preston Rackley - Boca Raton FL
Roderick Michael Peters West - Colchester VT
Assignee:
International Business Machines Corp. - Armonk NY
International Classification:
G09G 504
US Classification:
345154
Abstract:
Encoded color image data, stored in a first format such as YUV or YIQ, is converted to RGB format for output to a color display system. The conversion is carried out in real time synchronism with generation of the display, in order to minimize buffer storage requirements for the RGB output data. Present circuits use RAM (random access memory) storage arrays lookup tables for product functions defined in associated conversion equations. Each product function is a product of multiplication of a predetermined constant and data representing a U or V component of a source image pixel. Use of these tables effectively speeds up the conversion process, and has the added advantage of flexibility since the respective data is changeable to adjust to various image and display formats and conditions. In one embodiment, a RAM array used in the present format conversion process is also used (in a different display mode, with different stored data) as a conventional source of palette data. In the present conversion process, a cascaded network of adders receives product functions read out of one or more lookup table RAM arrays, adds certain of these functions together, and adds data representing Y components corresponding to the lookup table U and V arguments, to produce final output data representing red, green and blue (RGB) attributes of an instantly displayable pixel corresponding to a source pixel associated with respective source YUV components.

Raster Scan Display System

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US Patent:
45801355, Apr 1, 1986
Filed:
Aug 12, 1983
Appl. No.:
6/522895
Inventors:
David A. Kummer - Boca Raton FL
Darwin P. Rackley - Boca Raton FL
Jesus A. Saenz - Coral Springs FL
Assignee:
International Business Machines Corporation - Armonk NY
International Classification:
G09G 114
G09G 102
US Classification:
340750
Abstract:
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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Darwin P Rackley from Cary, NC, age ~73 Get Report