Patents by Inventor Chi-Tang Hsieh

Chi-Tang Hsieh 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: 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
  • Patent number: 10437068
    Abstract: An optical waveguide element including a light entrance portion and a light exit portion is provided. The light entrance portion includes a first light guide layer, a second light guide layer, and at least one third light guide layer. Light entrance surfaces of the first light guide layer and the second light guide layer jointly compose a first inclined surface. Light exit surfaces of the first light guide layer and the second light guide layer jointly compose a second inclined surface. The first inclined surface and the second inclined surface are inclined relative to a bottom surface of the first light guide layer. The thickness of the light exit portion is less than the total thickness of the first light guide layer, the second light guide layer, and the at least one third light guide layer. A display device is also provided.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: October 8, 2019
    Assignee: Coretronic Corporation
    Inventors: Yi-Hsuang Weng, Chih-Hsien Tsai, Chi-Tang Hsieh, Haw-Woei Pan
  • Patent number: 10429650
    Abstract: A head-mounted display including a transparent display, a liquid crystal lens and a first Fresnel lens is provided. The transparent display is configured to emit an image light beam. The liquid crystal lens is disposed near the transparent display. The transparent display is disposed between the liquid crystal lens and the first Fresnel lens. The first Fresnel lens is configured to receive an ambient light beam. The head-mounted display allows at least a part of the image light beam emitted from the transparent display passing through a pupil by phase modulating of at least a part of the liquid crystal lens.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: October 1, 2019
    Assignee: Coretronic Corporation
    Inventors: Chih-Hsien Tsai, Chi-Tang Hsieh, Haw-Woei Pan
  • Publication number: 20190294037
    Abstract: A rear projection screen includes a prism film, a first diffusion layer, a second diffusion layer and a plurality of light absorbing structures sequentially arranged in a first direction. The prism film includes a first light transmissive substrate and a plurality of prism structures. The first light transmissive substrate has a first surface away from the first diffusion layer. The prism structures are disposed on the first surface. The prism structures receive the image beam and guide the image beam to be transmitted in the first direction. The first diffusion layer and the second diffusion layer have different refractive indices. The light absorbing structures have a gap therebetween. The second diffusion layer has a second surface facing the light absorbing structures. An area occupied by an orthographic projection of the light absorbing structures on the second surface is A1, a total area of the second surface is A2, and 1?(A2?A1)/A1?5.
    Type: Application
    Filed: March 13, 2019
    Publication date: September 26, 2019
    Inventors: CHIA-HUA CHEN, SHIH-YUAN LIU, FANG-HSUAN SU, CHI-TANG HSIEH
  • Publication number: 20190249833
    Abstract: A wavelength-converting wheel has a light incident side. The wavelength-converting wheel includes a motor, a turntable, a wavelength-converting layer and a reflective element. The motor has a rotating shaft. The turntable has an inner ring portion and an annular irradiation portion. The inner ring portion is sleeved on the rotating shaft, the annular irradiation portion is connected to an outer edge of the inner ring portion, and the annular irradiation portion includes a light-reflecting region and a wavelength-converting region. The wavelength-converting layer is disposed in the wavelength-converting region and has a light receiving surface facing the light incident side. The reflective element is disposed in the light-reflecting region and has a reflective surface facing the light incident side. The light receiving surface is coplanar with the reflective surface or the light receiving surface is farther from the light incident side with respect to the reflective surface.
    Type: Application
    Filed: February 13, 2019
    Publication date: August 15, 2019
    Inventors: PI-TSUNG HSU, CHI-TANG HSIEH, MING-TSUNG WENG
  • Publication number: 20190253676
    Abstract: An illumination system includes an exciting light source module, a dichroic element, a wavelength-converting element, a light homogenizing element and a lens array. The exciting light source module includes a plurality of exciting light sources, each for providing an exciting beam. The dichroic element allows the exciting beam to be transmitted to the wavelength-converting element. The wavelength-converting element converts the exciting beam into a converted beam and reflects the converted beam to the dichroic element, and the dichroic element transmits the converted beam to the light homogenizing element. The light homogenizing element has a light incident end. The lens array includes a plurality of lens units, and a long side of each of the lens units is parallel to a long side of the light incident end when being projected along the transmission path of the converted beam to the light incident end.
    Type: Application
    Filed: January 31, 2019
    Publication date: August 15, 2019
    Inventors: CHIH-HSIEN TSAI, HSIN-YUEH CHANG, YI-HSUANG WENG, JO-HAN HSU, CHI-TANG HSIEH
  • Patent number: 10379431
    Abstract: A projection apparatus including an illumination system, a light valve, and an image-forming system is provided. The illumination system includes a first dichroic unit, a second dichroic unit, a third dichroic unit, two wavelength conversion modules, two light sources respectively emitting a first beam and a second beam, and an excitation light source module emitting an excitation beam. The first dichroic unit and the second dichroic unit are disposed on a transmission path of the excitation beam. The two wavelength conversion modules respectively convert the corresponding partial excitation beam coming from the first dichroic unit and the second dichroic unit into two converted beams. The light valve converts the first beam, the two converted beams, and the second beam coming from the third dichroic unit into an image beam. The image-forming system is disposed on a transmission path of the image beam.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: August 13, 2019
    Assignee: Coretronic Corporation
    Inventors: Hao-Wei Chiu, Ko-Shun Chen, Chi-Hsun Wang, Chi-Tang Hsieh
  • Publication number: 20190246080
    Abstract: A projection device and a light engine module thereof are provided. The light engine module includes a first dichroic element, a first light valve, a second light valve, a light combining element, a first light converging element, a second light converging element, a first light guiding element, and a second light guiding element. The first dichroic element divides an illumination beam into a first color beam and a second color beam. The first light valve converts the first color beam into a first image beam. The second light valve converts the second color beam into a second image beam. The light combining element is disposed on transmission paths of the first image beam and the second image beam. The first light guiding element guides the first color beam to the first light valve.
    Type: Application
    Filed: January 22, 2019
    Publication date: August 8, 2019
    Inventors: HAW-WOEI PAN, CHI-TANG HSIEH, CHIH-HSIEN TSAI
  • Publication number: 20190227417
    Abstract: The disclosure provides a projector, an image generation device, and an image generation method thereof. The projector includes an image generator, a light combiner, and a projection lens. The image generator includes light valves and generates an image beam. The light combiner includes a diffusing and filtering component, which generates a combined beam, and the image generator receives the combined beam from the diffusing and filtering component. In a first time period, the light combiner converts a first input beam into partial beams. The partial beams are transmitted to the light valves respectively. In a second time period, the light combiner receives a second input beam. The diffusing and filtering component filters out one of the partial beams, and the other of the partial beams are transmitted with the second input beam respectively to the light valves.
    Type: Application
    Filed: January 14, 2019
    Publication date: July 25, 2019
    Applicant: Coretronic Corporation
    Inventors: Haw-Woei Pan, Chi-Tang Hsieh, Hsin-Yueh Chang
  • Publication number: 20190227424
    Abstract: A rear projection screen includes a prism film, a first diffusion layer, a second diffusion layer and a light absorbing film sequentially disposed along a first direction. The prism film includes a first light-transmitting substrate and prism structures, wherein the prism structures are disposed on a surface of the first light-transmitting substrate away from the first diffusion layer. The prism structures receive an image beam and guide the image beam to be transmitted along the first direction. The first diffusion layer and the second diffusion layer have different refractive indexes. There are light-absorbing structures disposed in the light absorbing film, and the light-absorbing structures are arranged spaced apart from each other.
    Type: Application
    Filed: January 23, 2019
    Publication date: July 25, 2019
    Inventors: CHING-HSIANG LI, SHU-PING YANG, FANG-HSUAN SU, CHI-TANG HSIEH, FU-CHIANG HSU
  • Publication number: 20190227416
    Abstract: An illumination system including a first excitation light source, a wavelength conversion element, and a scattering element is provided. The first excitation light source emits a first excitation beam. The wavelength conversion element includes a wavelength conversion material. The wavelength conversion element has a first region and a second region. A concentration of the wavelength conversion material in the first region is greater than a concentration of the wavelength conversion material in the second region. The scattering element is disposed on a transmission path of the first excitation beam. A projection apparatus with the illumination system is also provided.
    Type: Application
    Filed: January 14, 2019
    Publication date: July 25, 2019
    Applicant: Coretronic Corporation
    Inventors: Haw-Woei Pan, Chi-Tang Hsieh
  • Publication number: 20190227418
    Abstract: An illumination system including first, second and third light sources, a splitting element and a wavelength conversion element is provided. The first light source emits a first light beam. The second light source emits a second light beam. The third light source emits a third light beam. The splitting element is disposed on transmission paths of the first, the second and the third light beams. The splitting element reflects the first and the third light beams, and allows the second light beam to pass through. During a first time period, the first light beam is transmitted to a first position and the second light beam is transmitted to a second position. During a second time period, the third light beam is transmitted to the first position and the second light beam is transmitted to the second position. Furthermore, a projection apparatus is also provided.
    Type: Application
    Filed: January 15, 2019
    Publication date: July 25, 2019
    Applicant: Coretronic Corporation
    Inventors: Hsin-Yueh Chang, Haw-Woei Pan, Chi-Tang Hsieh
  • Publication number: 20190187549
    Abstract: A projection screen including a light absorbing film and a projection film is provided. The light absorbing film includes a transparent layer and a plurality of light absorbing microstructures, where the light absorbing microstructures are embedded in the transparent layer and arranged at intervals, each of the light absorbing microstructures is asymmetrical to a reference plane, the transparent layer has two surfaces opposite to each other, and the reference plane passes through a geometric center of each of the light absorbing microstructures and is parallel to each of the surfaces, and there is a space between each of the light absorbing microstructures and each of the surfaces. The projection film and the light absorbing film are stacked on each other. A light absorbing film is also provided, and the projections screen and the light absorbing film have good optical quality.
    Type: Application
    Filed: December 6, 2018
    Publication date: June 20, 2019
    Applicant: Nano Precision Taiwan Limited
    Inventors: Fang-Hsuan Su, Fu-Chiang Hsu, Wan-Jung Li, Shih-Yuan Liu, Chia-Hua Chen, Chi-Tang Hsieh
  • Publication number: 20190163043
    Abstract: An illumination system includes an exciting light source, a first lens set, a dichroic element, a wavelength-converting element and a beam splitter. The exciting light source emits an excitation beam. The dichroic element reflects the excitation beam to the first lens set. The first lens set has an optical axis. The excitation beam is incident into the first lens set in a direction parallel to the optical axis and passes through the first lens set. The beam axis of the excitation beam is noncoaxial with the optical axis. The wavelength-converting element has a reflective region and a wavelength-converting region. The wavelength-converting region converts the excitation beam into a converted beam, which passes through the dichroic element and the beam splitter. The reflective region reflects the excitation beam to the first lens set and the beam splitter. The beam splitter splits the excitation beam into two branch excitation beams.
    Type: Application
    Filed: November 9, 2018
    Publication date: May 30, 2019
    Inventors: Haw-Woei Pan, Chih-Hsien Tsai, Chi-Tang Hsieh
  • Publication number: 20190146318
    Abstract: A projector and a wavelength-converting element are disclosed. The projector includes an illumination system, a light valve and a lens. The illumination system includes a light source providing an excitation beam, and a wavelength conversion device located at a transmission path of the excitation beam. The wavelength-converting element includes a substrate having a wavelength-converting area, an optical film disposed in the wavelength-converting area of the substrate, and a fluorescent film covering the optical film and converts the excitation beam into a converting beam. The converting beam and the excitation beam constitute an illumination beam. The fluorescent film contains phosphors, wherein the phosphors having a larger particle size are distributed among or above the phosphors having a smaller particle size. The light valve converts the illumination beam into an image beam. The image beam becomes a projection beam after passing through the lens.
    Type: Application
    Filed: November 14, 2018
    Publication date: May 16, 2019
    Applicant: Coretronic Corporation
    Inventors: Chi-Tang Hsieh, Chia-Lun Tsai, Jo-Han Hsu
  • Publication number: 20190137858
    Abstract: The invention discloses a phosphor wheel, and a projector using the phosphor wheel. The projector includes an illumination system, a light valve, and a projection lens. The illumination system is used to provide an illumination beam. The light valve is disposed on a transmission path of the illumination beam and converts the illumination beam into an image beam. The projection lens is disposed on a transmission path of the image beam. The illumination system includes an excitation light source and a phosphor wheel. The excitation light source is used to provide an excitation beam to the phosphor wheel. The phosphor wheel includes a motor, a disk plate, a reflection member, and at least one phosphor layer. The motor has a shaft. The disk plate is connected to the shaft. In the invention, the phosphor wheel has better reliability and rigidity, and has the effect of enhancing heat dissipation.
    Type: Application
    Filed: November 6, 2018
    Publication date: May 9, 2019
    Inventors: Chi-Tang HSIEH, Haw-Woei PAN, Pi-Tsung HSU, Chih-Hsien TSAI
  • Patent number: 10281809
    Abstract: The invention provides a projection apparatus and an illumination system. The projection apparatus includes an illumination system, a light valve, and a projection lens. The illumination system includes at least one laser light source, at least one light separating element, a wavelength conversion element, and a reflective element. The at least one laser light source is adapted to generate at least one laser beam, and the at least one laser beam is adapted to penetrate at least one first coating region of the light separating element. The wavelength conversion element is adapted to convert the laser beam from the light separating element into a converted beam. A second coating region of a reflective surface of the reflective element is adapted to reflect a portion of the laser beam from the wavelength conversion element, and the second coating region and the first coating region are adapted to reflect the converted beam. The portion of the laser beam and the converted beam constitute an illumination beam.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: May 7, 2019
    Assignee: Coretronic Corporation
    Inventors: Chia-Hao Wang, Chi-Tang Hsieh, Yao-Shun Lin
  • Publication number: 20190121119
    Abstract: A projector and a wavelength conversion device thereof are provided. The projector includes an illumination system that includes a light source device and a wavelength conversion device. The light source device is configured to provide an excitation beam. The wavelength conversion device is disposed on a transmission path of the excitation beam, and configured to convert the excitation beam into an illumination beam. The wavelength conversion device includes a substrate comprising a first surface, a second surface, and an axis center, a heat-conducting connection structure, a first reflective structure, and a wavelength conversion structure. The heat-conducting connection structure is located between the first surface and a first reflective structure, the first reflective structure is located between the heat-conducting connection structure and a wavelength conversion structure, and the wavelength conversion structure is located on the first reflective structure.
    Type: Application
    Filed: October 18, 2018
    Publication date: April 25, 2019
    Inventors: I-Hua Chen, Chi-Tang Hsieh
  • Publication number: 20190086784
    Abstract: A projection device for forming an image frame on a projection screen includes a first illumination system for emitting an illumination beam, a second illumination system for emitting an ultraviolet beam, a first light valve located on a transmission path of the illumination beam and for converting the illumination beam into a visible image beam, a lens located on a transmission path of the visible image beam and the ultraviolet beam and for projecting the visible image beam onto the projection screen to form an image frame area and projecting the ultraviolet beam onto the projection screen to form an opaque area, and a processor electrically connected to the first illumination system and the second illumination system and for controlling the first illumination system to emit the illumination beam and controlling the second illumination system to emit the ultraviolet beam. The image frame area partially overlaps the opaque area.
    Type: Application
    Filed: September 17, 2018
    Publication date: March 21, 2019
    Applicant: Coretronic Corporation
    Inventors: Haw-Woei Pan, Chih-Hsien Tsai, Yi-Hsuang Weng, Chi-Tang Hsieh, Jo-Han Hsu
  • Publication number: 20190086785
    Abstract: A projection screen for receiving a visible image beam and an ultraviolet beam from a projection device is provided. The projection screen includes a substrate, an anti-reflection layer and an anti-ultraviolet layer. The substrate includes a first surface adjacent to the projection device, a second surface away from the projection device and opposite to the first surface, a scattering reflection layer disposed between the first surface and the second surface, and an ultraviolet absorption layer disposed between the first surface and the second surface. The scattering reflection layer scatters and reflects the visible image beam. The ultraviolet absorption layer absorbs the ultraviolet beam so as to be changed from a transparent state to an opaque state. The anti-reflection layer is disposed on the first surface. The anti-ultraviolet layer is disposed at the second surface. The ultraviolet absorption layer is located between the scattering reflection layer and the anti-ultraviolet layer.
    Type: Application
    Filed: September 17, 2018
    Publication date: March 21, 2019
    Applicant: Coretronic Corporation
    Inventors: Haw-Woei Pan, Chih-Hsien Tsai, Yi-Hsuang Weng, Chi-Tang Hsieh, Jo-Han Hsu