Patents by Inventor Stephen Forrest

Stephen Forrest 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).

  • Patent number: 10243018
    Abstract: A device includes a three-dimensionally curved substrate, a patterned metal layer disposed on the curved substrate, and an array of optoelectronic devices, each optoelectronic device including an optoelectronic structure supported by the curved substrate. Each optoelectronic structure includes an inorganic semiconductor stack. The device further includes a set of contact stripes extending across the curved substrate, each optoelectronic structure being coupled to a respective contact stripe of the set of contact stripes. The array of optoelectronic devices is secured to the curved substrate via a bond between the patterned metal layer and the set of contact stripes.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: March 26, 2019
    Assignees: The Regents of the University of Michigan, Universal Display Corporation
    Inventors: Stephen Forrest, Jeramy D. Zimmerman, Xin Xu, Christopher Kyle Renshaw
  • Publication number: 20190003071
    Abstract: A method for producing a laminated shim includes subjecting a shim stock to a plasma electrolytic oxidization (PEO) process to create a PEO shim, applying an adhesive layer of an adhesive to a surface of the PEO shim, stacking at least one other PEO shim onto the adhesive layer of the PEO shim to create a stack of PEO shims, and pressing the stack of PEO shims together to create a PEO coated peelable laminate.
    Type: Application
    Filed: February 15, 2017
    Publication date: January 3, 2019
    Applicant: Shimco North America Inc.
    Inventors: Peter Voss, Stephen Forrest, Kapilan Paramanathan, Deoram Singh
  • Patent number: 10133671
    Abstract: A system and method are disclosed that include a bridge that translates non-coherent transactions, which are received from a non-coherent subsystem, into one or more coherent transactions to be issued to a coherent subsystem. The bridge also buffers data coherently in an internal cache, also known as a proxy cache, based on certain attributes of the non-coherent transaction. The invention may be applied to any cache, which receives read and write transactions that become coherent transactions.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: November 20, 2018
    Assignee: ARTERIS, Inc.
    Inventors: David A Kruckemyer, Craig Stephen Forrest
  • Patent number: 10014485
    Abstract: The present invention relates to efficient organic light emitting devices (OLEDs). More specifically, the present invention relates to white-emitting OLEDs, or WOLEDs. The devices of the present invention employ three emissive sub-elements, typically emitting red, green and blue, to sufficiently cover the visible spectrum. The sub-elements are separated by charge generating layers.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: July 3, 2018
    Assignee: The Regents of the University of Michigan
    Inventors: Stephen Forrest, Xiangfei Qi, Michael Slootsky
  • Publication number: 20180105923
    Abstract: A microfluidic device for use with a microfluidic delivery system, such as an organic vapor jet printing device, includes a glass layer that is directly bonded to a microfabricated die and a metal plate via a double anodic bond. The double anodic bond is formed by forming a first anodic bond at an interface of the microfabricated die and the glass layer, and forming a second anodic bond at an interface of the metal plate and the glass layer, where the second anodic bond is formed using a voltage that is lower than the voltage used to form the first anodic bond. The second anodic bond is formed with the polarity of the voltage reversed with respect to the glass layer and the formation of the first anodic bond. The metal plate includes attachment features that allow removal of the microfluidic device from a fixture.
    Type: Application
    Filed: December 13, 2017
    Publication date: April 19, 2018
    Inventors: Stephen Forrest, Gregory McGraw, Siddharth Harikrishna Mohan, Diane L. Peters
  • Patent number: 9873939
    Abstract: A microfluidic device for use with a microfluidic delivery system, such as an organic vapor jet printing device, includes a glass layer that is directly bonded to a microfabricated die and a metal plate via a double anodic bond. The double anodic bond is formed by forming a first anodic bond at an interface of the microfabricated die and the glass layer, and forming a second anodic bond at an interface of the metal plate and the glass layer, where the second anodic bond is formed using a voltage that is lower than the voltage used to form the first anodic bond. The second anodic bond is formed with the polarity of the voltage reversed with respect to the glass layer and the formation of the first anodic bond. The metal plate includes attachment features that allow removal of the microfluidic device from a fixture.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: January 23, 2018
    Assignees: The Regents of the University of Michigan, Universal Display Corporation
    Inventors: Stephen Forrest, Gregory McGraw, Siddharth Harikrishna Mohan, Diane Peters
  • Publication number: 20170322883
    Abstract: In accordance with various aspects of the invention, a recall transaction is issued if a tag filter entry needs to be freed up for an incoming transaction. Directory entries chosen for a recall transaction are pushed into a fully associative structure called victim buffer. If this structure gets full, then an entry is selected from entries inside the victim buffer for the recall.
    Type: Application
    Filed: May 23, 2017
    Publication date: November 9, 2017
    Applicant: Arteris, Inc.
    Inventors: Craig Stephen Forrest, David A. Kruckemyer
  • Publication number: 20170255558
    Abstract: The invention involves isolating a cache coherence controller from agents or units. The term unit as used herein may refer to one or more circuits, components, registers, processors, software subroutines, or any combination thereof. The separate units communicate with each other and are logically coupled.
    Type: Application
    Filed: May 23, 2017
    Publication date: September 7, 2017
    Applicant: Arteris, Inc.
    Inventors: Craig Stephen Forrest, David A. Kruckemyer
  • Publication number: 20170192890
    Abstract: A system and method are disclosed that include a bridge that translates non-coherent transactions, which are received from a non-coherent subsystem, into one or more coherent transactions to be issued to a coherent subsystem. The bridge also buffers data coherently in an internal cache, also known as a proxy cache, based on certain attributes of the non-coherent transaction. The invention may be applied to any cache, which receives read and write transactions that become coherent transactions.
    Type: Application
    Filed: December 30, 2016
    Publication date: July 6, 2017
    Applicant: Arteris, Inc.
    Inventors: David A Kruckemyer, Craig Stephen Forrest
  • Patent number: 9652391
    Abstract: Compression of address bits within a cache coherent subsystem of a chip is performed, enabling a cache coherent subsystem to avoid transmitting, storing, and operating upon unnecessary address information. Compression is performed according to any appropriate lossless algorithm, such as discarding of bits or code book lookup. The algorithm may be chosen according to constraints on logic delay and silicon area. An algorithm for minimum area would use a number of bits equal to the rounded up binary logarithm of the sum of all addresses of all memory regions. A configuration tool generates a logic description of the compression algorithm. The algorithm may be chosen automatically by the configuration tool. Decompression may be performed on addresses exiting the coherent subsystem.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: May 16, 2017
    Assignee: ARTERIS, Inc.
    Inventors: David A. Kruckemyer, Craig Stephen Forrest
  • Publication number: 20170104172
    Abstract: The present invention relates to mixed blocking layers and devices, such as organic light emitting diodes and other devices, including the same.
    Type: Application
    Filed: October 11, 2016
    Publication date: April 13, 2017
    Inventors: Stephen Forrest, Caleb Coburn, Jaesang Lee
  • Publication number: 20170024320
    Abstract: A system and method are disclosed for multiple coherent caches supporting agents that use different, incompatible coherence models. Compatibility is implemented by translators that accept coherency requests and snoop responses from an agent and accept snoop requests and coherency responses from a coherence controller. The translators issue corresponding coherency requests and snoop responses to the coherence controller and issue corresponding coherency responses and snoop requests to the agent. Interaction between translators and the coherence controller accord with a generic coherence model, which may be a subset, superset, or partially inclusive of features of any native coherence model. A generic coherence protocol may include binary values for each of characteristics: valid or invalid, owned or non-owned, unique or shared, and clean or dirty.
    Type: Application
    Filed: December 15, 2015
    Publication date: January 26, 2017
    Applicant: Arteris, Inc.
    Inventors: Craig Stephen FORREST, David A. KRUCKEMYER
  • Patent number: 9542316
    Abstract: A system and method are disclosed for multiple coherent caches supporting agents that use different, incompatible coherence models. Compatibility is implemented by translators that accept coherency requests and snoop responses from an agent and accept snoop requests and coherency responses from a coherence controller. The translators issue corresponding coherency requests and snoop responses to the coherence controller and issue corresponding coherency responses and snoop requests to the agent. Interaction between translators and the coherence controller accord with a generic coherence model, which may be a subset, superset, or partially inclusive of features of any native coherence model. A generic coherence protocol may include binary values for each of characteristics: valid or invalid, owned or non-owned, unique or shared, and clean or dirty.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: January 10, 2017
    Assignee: ARTERIS, INC.
    Inventors: Craig Stephen Forrest, David A. Kruckemyer
  • Patent number: 9508957
    Abstract: An OLED may include regions of a material having a refractive index less than that of the substrate, or of the organic region, allowing for emitted light in a waveguide mode to be extracted into air. These regions can be placed adjacent to the emissive regions of an OLED in a direction parallel to the electrodes. The substrate may also be given a nonstandard shape to further improve the conversion of waveguide mode and/or glass mode light to air mode. The outcoupling efficiency of such a device may be up to two to three times the efficiency of a standard OLED. Methods for fabricating such a transparent or top-emitting OLED is also provided.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: November 29, 2016
    Assignee: The Regents of the University of Michigan
    Inventors: Stephen Forrest, Yiru Sun
  • Publication number: 20160276614
    Abstract: The present invention relates to efficient organic light emitting devices (OLEDs). More specifically, the present invention relates to white-emitting OLEDs, or WOLEDs. The devices of the present invention employ three emissive sub-elements, typically emitting red, green and blue, to sufficiently cover the visible spectrum. The sub-elements are separated by charge generating layers.
    Type: Application
    Filed: May 27, 2016
    Publication date: September 22, 2016
    Inventors: Stephen Forrest, Xiangfei Qi, Michael Slootsky
  • Publication number: 20160188472
    Abstract: A distributed implementation for cache coherence comprises distinct agent interface units, coherency controllers, and memory interface units. The distinct units are separated logically and physically. Units are interconnected, and communicate with each other, by a transport network. Different organizations of connectivity are possible and chosen based on system performance and physical floorplan design constraints. The cache coherence subsystem is designed using software that exports a description of the system in a hardware description language.
    Type: Application
    Filed: July 23, 2015
    Publication date: June 30, 2016
    Applicant: ARTERIS, INC.
    Inventors: Craig Stephen Forrest, David A. Kruckemyer, David M. Parry
  • Publication number: 20160188473
    Abstract: Compression of address bits within a cache coherent subsystem of a chip is performed, enabling a cache coherent subsystem to avoid transmitting, storing, and operating upon unnecessary address information. Compression is performed according to any appropriate lossless algorithm, such as discarding of bits or code book lookup. The algorithm may be chosen according to constraints on logic delay and silicon area. An algorithm for minimum area would use a number of bits equal to the rounded up binary logarithm of the sum of all addresses of all memory regions. A configuration tool generates a logic description of the compression algorithm. The algorithm may be chosen automatically by the configuration tool. Decompression may be performed on addresses exiting the coherent subsystem.
    Type: Application
    Filed: December 30, 2015
    Publication date: June 30, 2016
    Applicant: Arteris, Inc.
    Inventors: David A. KRUCKEMYER, Craig Stephen FORREST
  • Publication number: 20160188471
    Abstract: A cache coherent system includes a directory with more than one snoop filter, each of which stores information in a different set of snoop filter entries. Each snoop filter is associated with a subset of all caching agents within the system. Each snoop filter uses an algorithm chosen for best performance on the caching agents associated with the snoop filter. The number of snoop filter entries in each snoop filter is primarily chosen based on the caching capacity of just the caching agents associated with the snoop filter. The type of information stored in each snoop filter entry of each snoop filter is chosen to meet the desired filtering function of the specific snoop filter.
    Type: Application
    Filed: December 31, 2014
    Publication date: June 30, 2016
    Inventors: Craig Stephen Forrest, David A. Kruckemyer
  • Publication number: 20160188470
    Abstract: A system and method for performing coherent cache snoops whereby a single or limited number of sharing coherent agents are snooped for a data access. A directory may store information identifying which coherent agents have a shared copy of a cache line. If more than one might be in a shared state, one is promoted to an owner state within the directory. Accesses to the shared cache line are responded to by a snoop to just one, or a number less than all, of the caching agents sharing the cache line.
    Type: Application
    Filed: December 31, 2014
    Publication date: June 30, 2016
    Inventors: David A. Kruckemyer, Craig Stephen Forrest
  • Patent number: 9379346
    Abstract: The present invention relates to efficient organic light emitting devices (OLEDs). More specifically, the present invention relates to white-emitting OLEDs, or WOLEDs. The devices of the present invention employ three emissive sub-elements, typically emitting red, green and blue, to sufficiently cover the visible spectrum. The sub-elements are separated by charge generating layers.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: June 28, 2016
    Assignee: The Regents of the University of Michigan
    Inventors: Stephen Forrest, Xiangfei Qi, Michael Slootsky