Patents by Inventor Hyungryul Choi

Hyungryul Choi 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).

  • Publication number: 20200310121
    Abstract: An electronic device such as a head-mounted display may have a display system that produces images. The display system may have one or more pixel arrays (26-1, 26-2) such as liquid-crystal-on-silicon pixel arrays. Images from the display system may be coupled into a waveguide (116) by an input coupler system (114X, 114Y) and may be coupled out of the waveguide in multiple image planes using an output coupler system (120X, 120Y). The input and output coupler systems may include single couplers, stacks of couplers, and tiled arrays of couplers. Multiplexing techniques such as wavelength multiplexing, polarization multiplexing, time-division multiplexing, multiplexing with image light having different ranges of angular orientations, and/or tunable lens techniques may be used to present images to a user in multiple image planes.
    Type: Application
    Filed: February 28, 2018
    Publication date: October 1, 2020
    Inventors: Hyungryul Choi, Eric J. Hansotte, Guolin Peng
  • Publication number: 20200174284
    Abstract: A head-mounted display may include a display system and an optical system in a housing. The display system may have displays that produce images. Positioners may be used to move the displays relative to the eye positions of a user's eyes. An adjustable optical system may include tunable lenses such as tunable cylindrical liquid crystal lenses. The displays may be viewed through the lenses when the user's eyes are at the eye positions. A sensor may be incorporated into the head-mounted display to measure refractive errors in the user's eyes. The sensor may include waveguides and volume holograms, and a camera for gathering light that has reflected from the retinas of the user's eyes. Viewing comfort may be enhanced by adjusting display positions relative to the eye positions and/or by adjusting lens settings based on the content being presented on the display and/or measured refractive errors.
    Type: Application
    Filed: May 3, 2018
    Publication date: June 4, 2020
    Inventors: Victoria C. Chan, Christina G. Gambacorta, Graham B. Myhre, Hyungryul Choi, Nan Zhu, Phil M. Hobson, William W. Sprague, Edward A. Valko, Qiong Huang, Branko Petljanski, Paul V. Johnson, Brandon E. Clarke, Elijah H. Kleeman
  • Publication number: 20200159020
    Abstract: An electronic device may have a pixel array. A light source may illuminate the pixel array to produce image light. The image light may pass through a multi-element lens and may be coupled into a waveguide using an input coupler such as a prism. An output coupler such as a diffraction grating may couple the image light out of the waveguide and towards a user. The user may view the image light and may observe real-world objects through the waveguide. The waveguide may have locally modified portions that define an aperture stop at a distance from an exit surface of the multi-element lens. The multi-element lens may have first and second achromatic doublets and first and second singlets between the first and second achromatic doublets. The lens elements of the multi-element lens may include lens elements with aspheric surfaces.
    Type: Application
    Filed: May 11, 2018
    Publication date: May 21, 2020
    Inventors: Guolin Peng, Hyungryul Choi, Scott M. DeLapp, Tyler G. Anderson
  • Publication number: 20200089014
    Abstract: An electronic device may have a display that emits image light, a waveguide, and an input coupler that couples the image light into the waveguide. Beam splitter structures may be embedded within the waveguide. The beam splitter structures may partially reflect the image light multiple times and may serve to generate replicated beams of light that are coupled out of the waveguide by an output coupler. The beam splitter structures may replicate the beams across two dimensions to provide an eye box with uniform-intensity light from the display across its area. The beam splitter structures may include stacked partially reflective beam splitter layers, sandwiched transparent substrate layers having different indices of refraction, a thick volume hologram interposed between substrate layers, or combinations of these or other structures. The reflectivity of the beam splitter structures may vary discretely or continuously across the lateral area of the waveguide.
    Type: Application
    Filed: August 20, 2019
    Publication date: March 19, 2020
    Inventors: Guolin Peng, Eric J. Hansotte, Francesco Aieta, Graham B. Myhre, Hyungryul Choi, Nan Zhu, Paul J. Gelsinger-Austin, Se Baek Oh, Scott M. DeLapp, Bradley C. Steele
  • Publication number: 20200057308
    Abstract: An electronic device may have a reflective display with a pixel array that generates images. The reflective display may be illuminated by an illumination system. Light from the illumination system may be reflected by the pixel array as image light. The image light may be provided to a viewer using a waveguide with diffractive input and output couplers. The illumination system may have a waveguide. The illumination system may also have a light source such as one or more light-emitting diodes. Light from the light source may be coupled into the waveguide of the illumination system by a diffractive coupler such as volume hologram that serves as an input coupler. Light from the light source may be routed to the display to illuminate the display using the waveguide in the illumination system and a diffractive coupler such as a volume hologram that serves as an output coupler.
    Type: Application
    Filed: June 5, 2018
    Publication date: February 20, 2020
    Inventors: Hyungryul Choi, Eric J Hansotte, Guolin Peng, Paul J. Gelsinger-Austin, Se Baek Oh
  • Publication number: 20200004020
    Abstract: An electronic device may have a spatial light modulator. Control circuitry in the electronic device may use the spatial light modulator to generate images. A light source may be used to produce illumination for the spatial light modulator. An optical system may direct the illumination onto the spatial light modulator and may direct corresponding reflected image light towards eye boxes for viewing by a user. Head-mounted support structures may be used to support the spatial light modulator, light source, and optical system. The light source may include light-emitting elements such as light-emitting diodes or lasers. Multiple light-emitting elements may be provided in the light source in a one-dimensional or two-dimensional array. During operation, the control circuitry can individually adjust the light-emitting elements.
    Type: Application
    Filed: May 10, 2019
    Publication date: January 2, 2020
    Inventors: Vikrant Bhakta, Hyungryul Choi, Guolin Peng, Scott M. DeLapp
  • Publication number: 20190377181
    Abstract: An electronic device may include a display system for presenting images close to a user's eyes. The display system may include a display unit that directs light and an optical system that redirects the light from the display unit towards a user's eyes. The optical system may include an input coupler and an output coupler formed on a waveguide. The input coupler may redirect light from the display unit so that it propagates in the waveguide towards the output coupler. The output coupler may redirect the light from the input coupler so that it exits the waveguide towards the user's eyes. A light-redirecting element may be used to redirect edge light that would otherwise be outside of the user's field of view towards the user's eyes.
    Type: Application
    Filed: June 6, 2017
    Publication date: December 12, 2019
    Inventors: Graham B. Myhre, Eric J. Hansotte, Guolin Peng, Hyungryul Choi, Se Baek Oh, Paul Gelsinger-Austin
  • Patent number: 10486600
    Abstract: Systems are presented for improving side mirror functionality of a vehicle. In one embodiment, the systems involve a side mirror with an adjustable profile. The systems include an actuator for altering the adjustable profile of a mirror in response to signals from a sensor (e.g., a camera). The mirror is coupled to a side of the vehicle through the actuator. In another embodiment, the systems involve an integrated side mirror. The systems include a first transmissive optic, a second transmissive optic, and at least one optical element that enable a field of view to be seen through a portion of the vehicle. In an additional embodiment, the systems involve a display system for integrating side-mirror functionality into a display image. The display system includes an image processing unit and a display unit for forming a display image at a location visible to a driver. The display image includes a field of view imaged by a sensor. Other systems are presented.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: November 26, 2019
    Assignee: Apple Inc.
    Inventors: David G. Havskjold, Arthur Y. Zhang, Hyungryul Choi, Matthew E. Last, Clarisse Mazuir
  • Publication number: 20190324561
    Abstract: A stylus can be provided with an on-board display that indicates to a user a color that will be applied when operating the stylus with an external device. The display on the stylus can be positioned to conveniently provide an indication of the color. For example, the display can be provided at or near a tip that is used to contact the external device. The stylus can further provide an ability for the user to manually select a color, which can then be shown on the display of the stylus and transmitted to the external device for application. The stylus can further include an ability to scan a color from a physical object, with the color being shown on the display of the stylus and transmitted to the external device for application.
    Type: Application
    Filed: July 27, 2018
    Publication date: October 24, 2019
    Inventors: Tyler G. ANDERSON, Hyungryul CHOI, Guolin PENG, Di HU, Scott M. DELAPP
  • Publication number: 20190324274
    Abstract: A head-mounted device may have a transparent display. The transparent display may be formed from a display unit that provides images to a user through an optical coupler. A user may view real-world objects through the optical coupler while control circuitry directs the transparent display to display computer-generated content over selected portions of the real-world objects. The head-mounted display may also include an adjustable opacity system. The adjustable opacity system may include an adjustable opacity layer such as a photochromic layer that overlaps the optical coupler and a light source that selectively exposes the adjustable opacity layer to ultraviolet light to control the opacity of the adjustable opacity layer. The adjustable opacity layer may block or dim light from the real-world objects to allow improved contrast when displaying computer-generated content over the real-world objects.
    Type: Application
    Filed: March 13, 2019
    Publication date: October 24, 2019
    Inventors: David A. Kalinowski, Hyungryul Choi, Jae Hwang Lee
  • Patent number: 9469083
    Abstract: Inverted Nanocone Structures and Its Fabrication Process. The method of fabricating nanotextured structures includes making a master mold having an array of tapered structures to be replicated. The master mold is pressed into a curable polymer supported on a substrate and the polymer is cured. Thereafter, the mold is detached from the cured polymer to form the nanotextured structure.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: October 18, 2016
    Assignee: Massachusetts Institute of Technology
    Inventors: Hyungryul Choi, Jeong-gil Kim, Kyoo Chul Park, Robert E. Cohen, Gareth H. McKinley, George Barbastathis
  • Patent number: 9120669
    Abstract: Fabrication method. At least first and second hardmasks are deposited on a substrate, the thickness and materials of the first and second hardmask selected to provided etch selectivity with respect to the substrate. A nanoscale pattern of photoresist is created on the first hardmask and the hardmask is etched through to create the nanoscale pattern on a second hardmask. The second hardmask is etched through to create the desired taper nanocone structures in the substrate. Reactive ion etching is preferred. A glass manufacturing process using a roller imprint module is also disclosed.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: September 1, 2015
    Assignee: Massachusetts Institute of Technology
    Inventors: Hyungryul Choi, Chih-Hao Chang, Kyoo Chul Park, Gareth H McKinley, George Barbastathis, Jeong-gil Kim
  • Publication number: 20140010994
    Abstract: Inverted Nanocone Structures and Its Fabrication Process. The method of fabricating nanotextured structures includes making a master mold having an array of tapered structures to be replicated. The master mold is pressed into a curable polymer supported on a substrate and the polymer is cured. Thereafter, the mold is detached from the cured polymer to form the nanotextured structure.
    Type: Application
    Filed: July 1, 2013
    Publication date: January 9, 2014
    Applicant: Massachusetts Institute of Technology
    Inventors: Hyungryul Choi, Jeong-gil Kim, Kyoo Chul Park, Robert E. Cohen, Gareth H. McKinley, George Barbastathis
  • Publication number: 20130025322
    Abstract: Fabrication method. At least first and second hardmasks are deposited on a substrate, the thickness and materials of the first and second hardmask selected to provided etch selectivity with respect to the substrate. A nanoscale pattern of photoresist is created on the first hardmask and the hardmask is etched through to create the nanoscale pattern on a second hardmask. The second hardmask is etched through to create the desired taper nanocone structures in the substrate. Reactive ion etching is preferred. A glass manufacturing process using a roller imprint module is also disclosed.
    Type: Application
    Filed: April 13, 2012
    Publication date: January 31, 2013
    Applicant: Massachusetts Institute of Technology
    Inventors: Hyungryul Choi, Chih-Hao Chang, Kyoo Chul Park, Gareth H. McKinley, George Barbastathis, Jeong-gil Kim