Patents by Inventor Hung-Ta Chien

Hung-Ta Chien 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: 20220373853
    Abstract: An optical waveguide, including a first structural layer, a second structural layer, a first light-guiding element, and multiple second light-guiding elements, is provided. The light-guiding elements are a partially penetrating and partially reflective layer. Multiple first sub-beams in an image beam are transmitted in the first or the second structural layer by a coupling inclined surface. Each first sub-beam forms multiple second sub-beams after being transmitted by the first or the second light-guiding elements. Some of the second sub-beams are coupled out of the optical waveguide by the second light-guiding elements, thereby enabling the image beam to expand in a first direction. For a portion of the visible light waveband, a trend of transmittance of the partially penetrating and partially reflective layer changing as a wavelength increases is opposite to a trend of transmittance of the first structural layer or the second structural layer changing as the wavelength increases.
    Type: Application
    Filed: April 27, 2022
    Publication date: November 24, 2022
    Applicant: Coretronic Corporation
    Inventor: Hung-Ta Chien
  • Patent number: 11460627
    Abstract: A backlight module including a light guide plate, a first light source, and a first optical film is provided. The light guide plate has a light incident surface, a light exiting surface, and a bottom surface, where the light incident surface is connected between the light exiting surface and the bottom surface, the light exiting surface is opposite to the bottom surface, and the bottom surface has a plurality of concentric ring-like first V-shaped microstructures. The first light source is disposed on a side of the light incident surface of the light guide plate, where a center of circle of the first V-shaped microstructures is aligned with the first light source. The first optical film is disposed on a side of the light exiting surface of the light guide plate. The first optical film has a plurality of concentric ring-like second V-shaped microstructures.
    Type: Grant
    Filed: October 6, 2020
    Date of Patent: October 4, 2022
    Assignee: Coretronic Corporation
    Inventor: Hung-Ta Chien
  • Publication number: 20220308335
    Abstract: A light homogenizing element includes a light incident surface and at least one diffusion surface, including: a first substrate, a carrier layer, a piezoelectric film, a driving electrode, a light-transmitting layer, and multiple light diffusion microstructures. The first substrate includes a first surface and a second surface opposite to each other. The carrier layer is located on the first surface of the first substrate and includes a light passing region penetrating the carrier layer, and includes a protruding structure enclosing the light passing region. The light-transmitting layer is provided overlapping on the protruding structure, and the surface of the light-transmitting layer covering the light passing region is the light incident surface. The multiple light diffusion microstructures are provided on the at least one diffusion surface, and projections of the multiple light diffusion microstructures on the light-transmitting layer are located in the light passing region.
    Type: Application
    Filed: March 22, 2022
    Publication date: September 29, 2022
    Applicant: Coretronic Corporation
    Inventors: Fu-Ming Chuang, Hung-Ta Chien
  • Patent number: 11307418
    Abstract: A display apparatus includes a display element, a micro lens array, and a first light shielding element. The display element provides sub-image beams. The micro lens array is located in a transmission path of the sub-image beams, and has optical regions and first connection portions. Each first connecting portion is adapted to connect at least two adjacent optical regions, and each optical region is adapted to allow each sub-image beam to penetrate. The first light shielding element is located between the display element and the micro lens array, and has first light shielding regions and first light transmission regions. Each first light transmission region is disposed corresponding to each optical region and is adapted to allow each sub-image beam to penetrate. Each first light-shielding region is disposed corresponding to each first connecting portion and is adapted to prevent each sub-image beams from passing through each first connecting portion.
    Type: Grant
    Filed: November 28, 2019
    Date of Patent: April 19, 2022
    Assignee: Coretronic Corporation
    Inventors: Hung-Ta Chien, Hsin-Hsiang Lo, Chuan-Chung Chang
  • Patent number: 11287663
    Abstract: An optical transmitting module and a head mounted display device are provided. The optical transmitting module includes a waveguide and a first lens. The waveguide is located on a transmission path of an image beam. The waveguide includes a plurality of beam splitters configured to split the image beam the image beam into a first image beam and a second image beam. The second image beam reflected by the beam splitter is outputted from the waveguide, so as to display a virtual image. The first lens causes a plurality of virtual images displayed by a plurality of the second image beams reflected from different beam splitters at the same angle to coincide on a focal plane of the first lens. The head mounted display device can eliminate a ghost image phenomenon that occurs when the user observes the images displayed in a range closer to the eye.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: March 29, 2022
    Assignee: Coretronic Corporation
    Inventors: Yi-Chien Lo, Hung-Ta Chien, Hsin-Hsiang Lo
  • Publication number: 20220082829
    Abstract: A near-eye light field display device, including a display element, a micro-lens array, a first shielding element, and a second shielding element, is provided. The display element is configured to provide an image beam. The micro-lens array is located on a transmission path of the image beam. The micro-lens array has multiple micro-lenses connected to each other. The first shielding element is located between the display element and the micro-lens array, and the first shielding element includes multiple first shielding regions. The micro-lens array is located between the first shielding element and the second shielding element. The second shielding element includes multiple second shielding regions. The first shielding regions and the second shielding regions are located on the transmission path of the image beam passing through a junction of the micro-lenses, and a ratio of diameter of the micro-lenses and a lens pitch of the micro-lenses is less than 0.8.
    Type: Application
    Filed: December 24, 2020
    Publication date: March 17, 2022
    Applicant: Coretronic Corporation
    Inventors: Jui-Yi Wu, Hung-Ta Chien
  • Publication number: 20220066216
    Abstract: A manufacturing method of waveguide and a head mounted display device having the waveguide are provided. The head mounted display device is configured to be placed in front of at least one eye of a user, and includes a display unit, the first waveguide and the second waveguide. The display unit is configured to provide an image beam. The first waveguide is located between the display unit and the second waveguide. The first waveguide is configured to transmit the image beam to the second waveguide and adjust a light shape of the image beam to maintain a field angle and expand a pupil in a single dimension. The second waveguide is configured to transmit the image beam to the at least eye of the user, and the second waveguide can extend a light transmission path and provide a uniform image beam.
    Type: Application
    Filed: August 26, 2021
    Publication date: March 3, 2022
    Applicant: Coretronic Corporation
    Inventors: Chih-Wei Shih, Hung-Ta Chien
  • Publication number: 20220066214
    Abstract: The disclosure provides an optical waveguide, a manufacturing method of an optical waveguide, and a head-mounted display device. The optical waveguide has a first optical region and a second optical region for transmitting an image beam. The optical waveguide includes a plate body, multiple first light-guiding optical elements, and multiple optical microstructures. The first light-guiding optical elements are disposed in parallel lines on a light-guiding plane inside the plate body. The light-guiding plane is located in the first optical region, and there is a spacing between the adjacent first light-guiding optical elements. The image beam transmitted to the light-guiding plane is separated into multiple sub image beams, and the transmission paths of the sub image beams are at least partially different. The optical coupling-out structure is disposed in the plate body and is located in the second optical region.
    Type: Application
    Filed: April 18, 2021
    Publication date: March 3, 2022
    Applicant: Coretronic Corporation
    Inventor: Hung-Ta Chien
  • Publication number: 20220019081
    Abstract: A waveguide and a head-mounted display device are provided. The waveguide is used for transmitting an image beam. The waveguide includes a plate, at least one coupling-in prism, and microstructures. The plate has a first surface and a second surface. The image beam enters the plate through the first surface. The coupling-in prism is located on the second surface. The coupling-in prism has a first inclined surface, and the image beam is reflected by the first inclined surface and then transmitted in the plate. The microstructures are located on the second surface. Each microstructure has a second inclined surface. The image beam exits from the first surface after being reflected by the second inclined surface. A difference between refractive indices of the coupling-in prism and the microstructures is less than 0.05.
    Type: Application
    Filed: July 13, 2021
    Publication date: January 20, 2022
    Applicant: Coretronic Corporation
    Inventor: Hung-Ta Chien
  • Publication number: 20210181403
    Abstract: A backlight module including a light guide plate, a first light source, and a first optical film is provided. The light guide plate has a light incident surface, a light exiting surface, and a bottom surface, where the light incident surface is connected between the light exiting surface and the bottom surface, the light exiting surface is opposite to the bottom surface, and the bottom surface has a plurality of concentric ring-like first V-shaped microstructures. The first light source is disposed on a side of the light incident surface of the light guide plate, where a center of circle of the first V-shaped microstructures is aligned with the first light source. The first optical film is disposed on a side of the light exiting surface of the light guide plate. The first optical film has a plurality of concentric ring-like second V-shaped microstructures.
    Type: Application
    Filed: October 6, 2020
    Publication date: June 17, 2021
    Applicant: Coretronic Corporation
    Inventor: Hung-Ta Chien
  • Patent number: 11029556
    Abstract: A display device comprising a beam splitting element, a polarization modulating element, a light shifting element and a reflective liquid crystal panel is provided. The polarization modulating element is disposed on one side of the beam splitting element along the first direction between the beam splitting element and the light shifting element, the light shifting element is disposed on one side of the polarization modulating element along the first direction between the polarization modulating element and the reflective liquid crystal panel, and the reflective liquid crystal panel is disposed on one side of the light shifting element along the first direction, wherein the beam splitting element receives an illumination beam and allows an image beam to pass through, the illumination beam is reflected in the beam splitting element and transmitted in the first direction.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: June 8, 2021
    Assignee: Coretronic Corporation
    Inventors: Yi-Chien Lo, Hung-Ta Chien
  • Patent number: 11022805
    Abstract: A head-mounted display apparatus including a light source module, an optical adjustment element, a display module and a lens element is provided. The light source module provides an illumination beam. The optical adjustment element and the display module are disposed on a transmission path of the illumination beam, and the display module is configured to convert the illumination beam into an image beam. The optical adjustment element is located between the light source module and the display module. The lens element is disposed on a transmission path of the image beam, wherein a transmission direction of the maximum light-emitting intensity of the illumination beam transmitted from the light source module to the optical adjustment element is different to a transmission direction of the maximum light-emitting intensity of the illumination beam transmitted from the optical adjustment element to the display module.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: June 1, 2021
    Assignee: Coretronic Corporation
    Inventors: Hung-Ta Chien, Fu-Ming Chuang
  • Publication number: 20210141228
    Abstract: A near-eye optical system is configured to receive an image beam. The near-eye optical system includes a first optical waveguide, configured to expand the image beam in a first direction, and including a first surface, a second surface, a plurality of first reflecting slopes, and a plurality of second reflecting slopes. The first surface includes a first light-entering area. The second surface is opposite to the first surface. The second surface includes a concave area aligned with the first light-entering area, the concave area including a flat bottom surface, and a first inclined sidewall and a second inclined sidewall opposite to each other. The first reflecting slopes are disposed on the second surface, and the second reflecting slopes are disposed on the second surface.
    Type: Application
    Filed: November 4, 2020
    Publication date: May 13, 2021
    Applicant: Coretronic Corporation
    Inventor: Hung-Ta Chien
  • Publication number: 20210141220
    Abstract: A near-eye optical system, for receiving an image beam, includes an optical waveguide, configured to expand the image beam in a direction, and including a near-eye surface and a structure surface. The structure surface includes a light incident area and is opposite to the near-eye surface. The light incident area is located in a transmission path of the image beam. A plurality of reflective inclined surfaces are disposed on the structure surface and located at one side of the light incident surface and arranged along the direction. The structure surface is sequentially divided into the light incident area and a plurality of optical areas along the direction. A line number density of the reflective inclined surfaces in the optical area closest to the light incident area in the direction is less than a line number density of the reflective inclined surfaces in the optical area furthest from the light incident area in the direction.
    Type: Application
    Filed: November 4, 2020
    Publication date: May 13, 2021
    Applicant: Coretronic Corporation
    Inventors: Kuei-En Peng, Chih-Wei Shih, Hung-Ta Chien
  • Publication number: 20200310123
    Abstract: A display apparatus includes a display element, a micro lens array, and a first light shielding element. The display element provides sub-image beams. The micro lens array is located in a transmission path of the sub-image beams, and has optical regions and first connection portions. Each first connecting portion is adapted to connect at least two adjacent optical regions, and each optical region is adapted to allow each sub-image beam to penetrate. The first light shielding element is located between the display element and the micro lens array, and has first light shielding regions and first light transmission regions. Each first light transmission region is disposed corresponding to each optical region and is adapted to allow each sub-image beam to penetrate. Each first light-shielding region is disposed corresponding to each first connecting portion and is adapted to prevent each sub-image beams from passing through each first connecting portion.
    Type: Application
    Filed: November 28, 2019
    Publication date: October 1, 2020
    Applicant: Coretronic Corporation
    Inventors: Hung-Ta Chien, Hsin-Hsiang Lo, Chuan-Chung Chang
  • Publication number: 20200292820
    Abstract: A near-eye display device including a light engine, a first light waveguide, and a second light waveguide is provided. The light engine provides an image. The first light waveguide reproduces the image of a view angle region in a first direction. The first light waveguide includes a plurality of first beam splitters arranged along the first direction. The second light waveguide reproduces the image of a view angle region in a second direction. The second light waveguide includes a plurality of second beam splitters arranged along the second direction. The second light waveguide has a first surface and a second surface opposite to the first surface. The first surface faces the first light waveguide. An included angle is present between each of the second beam splitters and the second surface. The included angle is between 0 and 90 degrees and is not equal to 45 degrees.
    Type: Application
    Filed: February 23, 2020
    Publication date: September 17, 2020
    Applicant: Coretronic Corporation
    Inventors: Yi-Chien Lo, Hung-Ta Chien
  • Publication number: 20200209631
    Abstract: A head-mounted display apparatus including a light source module, an optical adjustment element, a display module and a lens element is provided. The light source module provides an illumination beam. The optical adjustment element and the display module are disposed on a transmission path of the illumination beam, and the display module is configured to convert the illumination beam into an image beam. The optical adjustment element is located between the light source module and the display module. The lens element is disposed on a transmission path of the image beam, wherein a transmission direction of the maximum light-emitting intensity of the illumination beam transmitted from the light source module to the optical adjustment element is different to a transmission direction of the maximum light-emitting intensity of the illumination beam transmitted from the optical adjustment element to the display module.
    Type: Application
    Filed: December 16, 2019
    Publication date: July 2, 2020
    Applicant: Coretronic Corporation
    Inventors: Hung-Ta Chien, Fu-Ming Chuang
  • Publication number: 20200124853
    Abstract: An optical transmitting module and a head mounted display device are provided. The optical transmitting module includes a waveguide and a first lens. The waveguide is located on a transmission path of an image beam. The waveguide includes a plurality of beam splitters configured to split the image beam the image beam into a first image beam and a second image beam. The second image beam reflected by the beam splitter is outputted from the waveguide, so as to display a virtual image. The first lens causes a plurality of virtual images displayed by a plurality of the second image beams reflected from different beam splitters at the same angle to coincide on a focal plane of the first lens. The head mounted display device can eliminate a ghost image phenomenon that occurs when the user observes the images displayed in a range closer to the eye.
    Type: Application
    Filed: October 18, 2019
    Publication date: April 23, 2020
    Applicant: Coretronic Corporation
    Inventors: Yi-Chien Lo, Hung-Ta Chien, Hsin-Hsiang Lo
  • Publication number: 20190353954
    Abstract: A display device comprising a beam splitting element, a polarization modulating element, a light shifting element and a reflective liquid crystal panel is provided. The polarization modulating element is disposed on one side of the beam splitting element along the first direction between the beam splitting element and the light shifting element, the light shifting element is disposed on one side of the polarization modulating element along the first direction between the polarization modulating element and the reflective liquid crystal panel, and the reflective liquid crystal panel is disposed on one side of the light shifting element along the first direction, wherein the beam splitting element receives an illumination beam and allows an image beam to pass through, the illumination beam is reflected in the beam splitting element and transmitted in the first direction.
    Type: Application
    Filed: May 8, 2019
    Publication date: November 21, 2019
    Applicant: Coretronic Corporation
    Inventors: Yi-Chien Lo, Hung-Ta Chien
  • Patent number: 10444616
    Abstract: A rear projection screen includes a transparent substrate, a light absorbing film and a first diffusion film in sequence from a projection side to a viewer side. The transparent substrate includes a first surface and a second surface opposite to each other, the first surface faces the projection side, the second surface faces the viewer side, and the first surface is disposed with a plurality of prism structures protruding toward the projection side. The transparent substrate is located between the light absorbing film and the prism structures. The light absorbing film includes a plurality of light absorbing structures arranged at intervals from each other, and the distribution density of the prism structures is greater than that of the light absorbing structures. The light absorbing film is located between the first diffusion film and the transparent substrate. The rear projection screen through the above-mentioned design has a good image display quality.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: October 15, 2019
    Assignee: NANO PRECISION TAIWAN LIMITED
    Inventors: Ching-Hsiang Li, Fang-Hsuan Su, Shu-Ping Yang, Chi-Tang Hsieh, Fu-Chiang Hsu, Hung-Ta Chien