Patents by Inventor Dewen Cheng

Dewen Cheng 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: 10281723
    Abstract: A tiled head-mounted display device, comprising: an optical component including a plurality of prisms with free-form surfaces, each prism being a wedge prism comprising a first optical surface, a second optical surface and a third optical surface; and a display component including a plurality of micro-displays, wherein the number of the micro-displays and the number of the prisms with free-form surfaces is identical. The tiled head-mounted display device according to the present invention is compact and light, provides wide field of view and high resolution, especially for the optical tiling head-mounted display device, the exit pupil planes of each display channels are coincident, thus avoiding pupil aberration and keeping exit pupil diameter and eye clearance same as the single ocular. There is no resolution variance throughout the entire field of view, thus preventing extra trapezoid distortion.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: May 7, 2019
    Assignees: THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA, BEIJING INSTITUTE OF TECHNOLOGY
    Inventors: Dewen Cheng, Yongtian Wang, Hong Hua
  • Publication number: 20180246333
    Abstract: A light-weight and ultrathin waveguide optical element having a large field of view includes two or more layers of waveguide plates provided to be overlapped with each other. Within each layer of the waveguide plate are included multiple reflective surfaces with different reflectivity, such that light transmitted through the waveguide plate has a substantially uniform distribution of intensity in a predetermined area when exiting from the waveguide plate. The waveguide optical element is ultrathin such that it can be directly mounted into a spectacle frame. Use of the waveguide optical element with a projection optical assembly can improve user experience as well as display effect with good contrast.
    Type: Application
    Filed: January 10, 2018
    Publication date: August 30, 2018
    Applicant: Beijing NED+AR Display Technology Co., Ltd.
    Inventors: Dewen CHENG, Qiwei WANG
  • Publication number: 20180206702
    Abstract: A rigid endoscope includes an endoscope tube, a light-emitting diode (LED) chip, an objective lens group, a rod lens group and a lead. the objective lens group and the rod lens group are disposed in the endoscope tube and arranged in a direction from a front end to a rear end of the endoscope tube; the LED chip is mounted at the front end of the endoscope tube; and the lead is led out from the LED chip, runs through a gap between an inner circle of the endoscope tube and an outer circle of the objective lens group, and arrives at the rear end of the endoscope tube.
    Type: Application
    Filed: September 23, 2015
    Publication date: July 26, 2018
    Inventors: Xiaohua LIU, Ye YUAN, Dewen CHENG, Liquan DONG, Xiatian WANG
  • Publication number: 20180143440
    Abstract: A wearable augmented reality (AR) or virtual reality (VR) display apparatus includes an optical waveguide; an optical free-form surface; and a microdisplay; wherein optical free-form surface is optically coupled to the waveguide through an inclined optical path. A near-eye display apparatus includes two or more layers of waveguide plates arranged to overlap with each other, wherein within each layer of the waveguide plate includes multiple reflective surfaces different in reflectivity, so as to ensure that light transmitted through the waveguide plate has a substantially uniform distribution of intensity in a predetermined area when exiting outward from the waveguide plate. The waveguide optical element is ultrathin so as to be directly mounted into a spectacle frame. User experience and contrast level are also improved.
    Type: Application
    Filed: January 3, 2018
    Publication date: May 24, 2018
    Applicant: Beijing NED+AR Display Technology Co., Ltd.
    Inventors: Dewen CHENG, Qiwei WANG
  • Patent number: 9869862
    Abstract: A wearable augmented reality (AR) or virtual reality (VR) display apparatus includes an optical waveguide; an optical free-form surface; and a microdisplay; wherein optical free-form surface is optically coupled to the waveguide through an inclined optical path.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: January 16, 2018
    Assignee: Beijing NED+AR Display Technology Co., Ltd.
    Inventors: Dewen Cheng, Yongtian Wang, Yue Liu
  • Publication number: 20160274363
    Abstract: A wearable augmented reality (AR) or virtual reality (VR) display apparatus includes an optical waveguide; an optical free-form surface; and a microdisplay; wherein optical free-form surface is optically coupled to the waveguide through an inclined optical path.
    Type: Application
    Filed: June 1, 2016
    Publication date: September 22, 2016
    Applicant: Beijing Institute of Technology
    Inventors: Dewen CHENG, Yongtian WANG, Yue LIU
  • Patent number: 9366870
    Abstract: A display apparatus includes a planar waveguide optical element, a projection optical system, and a microdisplay device. By including free-form optics and waveguide technology, the volume and weight of the display apparatus can be reduced, and an optical system can be realized with improved image quality, structure, and performance parameters.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: June 14, 2016
    Assignee: BEIJING INSTITUTE OF TECHNOLOGY
    Inventors: Dewen Cheng, Yongtian Wang, Yue Liu
  • Publication number: 20160085075
    Abstract: A see-through free-form head-mounted display including a wedge-shaped prism-lens having free-form surfaces and low F-number is provided.
    Type: Application
    Filed: December 2, 2015
    Publication date: March 24, 2016
    Inventors: DEWEN CHENG, Hong Hua, Yongtian Wang
  • Publication number: 20160085074
    Abstract: A tiled head-mounted display device, comprising: an optical component including a plurality of prisms with free-form surfaces, each prism being a wedge prism comprising a first optical surface, a second optical surface and a third optical surface; and a display component including a plurality of micro-displays, wherein the number of the micro-displays and the number of the prisms with free-form surfaces is identical. The tiled head-mounted display device according to the present invention is compact and light, provides wide field of view and high resolution, especially for the optical tiling head-mounted display device, the exit pupil planes of each display channels are coincident, thus avoiding pupil aberration and keeping exit pupil diameter and eye clearance same as the single ocular. There is no resolution variance throughout the entire field of view, thus preventing extra trapezoid distortion.
    Type: Application
    Filed: November 30, 2015
    Publication date: March 24, 2016
    Inventors: Dewen Cheng, Yongtian Wang, Hong Hua
  • Patent number: 9244277
    Abstract: A tiled head-mounted display device comprises an optical component including a plurality of prisms with free-form surfaces, and a display component including a plurality of micro-displays (6), wherein the number of the micro-displays (6) and the number of the prisms with free-form surfaces is identical, and each prism with free-form surfaces and the corresponding micro-display (6) constitute a display channel. Each prism is a wedge prism including a first surface (2), a second surface (3) and a third surface (4). The exit pupil planes of each display channel are coincident, thus avoiding pupil aberration and keeping exit pupil diameter and eye clearance same as a single ocular. There is no resolution variance throughout the entire field of view, thus preventing extra trapezoid distortion. The tiled head-mounted display device is compact and lightweight, and provides wide field of view and high resolution.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: January 26, 2016
    Assignees: The Arizona Board of Regents on behalf of the University of Arizona, Beijing Institute of Technology
    Inventors: Dewen Cheng, Yongtian Wang, Hong Hua
  • Patent number: 9239453
    Abstract: A see-through free-form head-mounted display including a wedge-shaped prism-lens having free-form surfaces and low F-number is provided.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: January 19, 2016
    Assignees: BEIJING INSTITUTE OF TECHNOLOGY, THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventors: Dewen Cheng, Hong Hua, Yongtian Wang
  • Patent number: 9207443
    Abstract: A see-through free-form head-mounted display including a wedge-shaped prism-lens having free-form surfaces and low F-number is provided.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: December 8, 2015
    Assignees: BEIJING INSTITUTE OF TECHNOLOGY, THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventors: Dewen Cheng, Hong Hua, Yongtian Wang
  • Publication number: 20150268474
    Abstract: A display apparatus includes a planar waveguide optical element, a projection optical system, and a microdisplay device. By including free-form optics and waveguide technology, the volume and weight of the display apparatus can be reduced, and an optical system can be realized with improved image quality, structure, and performance parameters.
    Type: Application
    Filed: June 3, 2015
    Publication date: September 24, 2015
    Applicant: BEIJING INSTITUTE OF TECHNOLOGY
    Inventors: Dewen CHENG, Yongtian WANG, Yue LIU
  • Patent number: 9052505
    Abstract: A display apparatus includes a planar waveguide optical element, a projection optical system, and a microdisplay device. By including free-form optics and waveguide technology, the volume and weight of the display apparatus can be reduced, and an optical system can be realized with improved image quality, structure, and performance parameters.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: June 9, 2015
    Assignee: BEIJING INSTITUTE OF TECHNOLOGY
    Inventors: Dewen Cheng, Yongtian Wang, Yue Liu
  • Publication number: 20140293434
    Abstract: A display apparatus includes a planar waveguide optical element, a projection optical system, and a microdisplay device. By including free-form optics and waveguide technology, the volume and weight of the display apparatus can be reduced, and an optical system can be realized with improved image quality, structure, and performance parameters.
    Type: Application
    Filed: June 3, 2014
    Publication date: October 2, 2014
    Applicant: BEIJING INSTITUTE OF TECHNOLOGY
    Inventors: Dewen CHENG, Yongtian WANG, Yue LIU
  • Publication number: 20140009845
    Abstract: A see-through free-form head-mounted display including a wedge-shaped prism-lens having free-form surfaces and low F-number is provided.
    Type: Application
    Filed: August 27, 2013
    Publication date: January 9, 2014
    Inventors: Dewen Cheng, Hong Hua, Yongtian Wang
  • Publication number: 20130187836
    Abstract: A tiled head-mounted display device comprises an optical component including a plurality of prisms with free-form surfaces, and a display component including a plurality of micro-displays (6), wherein the number of the micro-displays (6) and the number of the prisms with free-form surfaces is identical, and each prism with free-form surfaces and the corresponding micro-display (6) constitute a display channel. Each prism is a wedge prism including a first surface (2), a second surface (3) and a third surface (4). The exit pupil planes of each display channel are coincident, thus avoiding pupil aberration and keeping exit pupil diameter and eye clearance same as a single ocular. There is no resolution variance throughout the entire field of view, thus preventing extra trapezoid distortion. The tiled head-mounted display device is compact and lightweight, and provides wide field of view and high resolution.
    Type: Application
    Filed: April 30, 2010
    Publication date: July 25, 2013
    Inventors: Dewen Cheng, Yongtian Wang, Hong Hua
  • Publication number: 20120081800
    Abstract: A see-through free-form head-mounted display including a wedge-shaped prism-lens having free-form surfaces and low F-number is provided.
    Type: Application
    Filed: April 20, 2010
    Publication date: April 5, 2012
    Inventors: Dewen Cheng, Hong Hua, Yongtian Wang