Patents by Inventor Tapani Kalervo Levola

Tapani Kalervo Levola 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: 11119262
    Abstract: A optical device includes a waveguide plate, which includes an in-coupling element to form first guided light (B1) and a second guided light (B2) by diffracting input light (IN1), an expander element to form third guided light (B3) by diffracting the first guided light (B1), an out-coupling element to form first output light (OB3) by diffracting the third guided light (B3), a bypass element to form fourth guided light (B4) by diffracting the second guided light (B2), wherein the first guided light (B1) propagates in a first direction, the second guided light (B2) propagates in a second direction, and the angle ?12 between the first direction) and the second direction is in the range of 60° to 120°, wherein the out-coupling element includes one or more augmenting regions.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: September 14, 2021
    Assignee: SHENZHEN OPTIARK SEMICONDUCTOR TECHNOLOGIES LIMITED
    Inventors: Tapani Kalervo Levola, Houqiang Jiang, Yisheng Zhu
  • Publication number: 20210109273
    Abstract: This invention relates to an optical expander device with its display device, and a method of light output and image display, including a waveguide plate, the first optical diffractive in-coupling element, the first retrieval unit, the second retrieval unit, the second optical diffractive expander element, the third optical diffractive expander element, and the fourth optical diffractive out-coupling element. The fourth optical diffractive out-coupling element forms part of the first output light (OB4), by diffracting guided light, the third retrieval light (B3a), and the fourth retrieval light (B4a) to the same direction; simultaneously, the fourth optical diffractive out-coupling element diffracts the first direct-through light (B1b) and the second direct-through light (B2b) to the same direction, forming the other part of the first output light (OB4). This device of the present disclosure may greatly improve the uniformity of the intensity distribution of the output light.
    Type: Application
    Filed: December 22, 2020
    Publication date: April 15, 2021
    Inventors: Houqiang Jiang, Tapani Kalervo Levola, Yisheng Zhu, Yifan Zhu
  • Patent number: 9200779
    Abstract: An apparatus including a three-dimensional display, for displaying volumetric images, including a three-dimensional non linear photoluminescent medium defining a display volume and including nanostructures distributed throughout the display volume; and a scanner configured to scan an output volume, where a first photon flux and a second photon flux meet, in three dimensions within the display volume.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: December 1, 2015
    Assignee: Nokia Technologies Oy
    Inventors: Tapani Kalervo Levola, Jyrki Sakari Kimmel
  • Publication number: 20130170177
    Abstract: An apparatus including a three-dimensional display, for displaying volumetric images, including a three-dimensional non linear photoluminescent medium defining a display volume and including nanostructures distributed throughout the display volume; and a scanner configured to scan an output volume, where a first photon flux and a second photon flux meet, in three dimensions within the display volume.
    Type: Application
    Filed: May 25, 2010
    Publication date: July 4, 2013
    Applicant: Nokia Corporation
    Inventors: Tapani Kalervo Levola, Jyrki Sakari Kimmel
  • Patent number: 8155489
    Abstract: A light distributing device (100) comprises a thin planar waveguide (10) and a waveguiding ridge (20). An incoming light beam (B1) coupled into the ridge (20) forms a second light beam (B2) waveguided in the ridge (20). The ridge (20) and the planar waveguide (10) have a common portion (23) such that light is further coupled from the side of the ridge (20) into the planar waveguide (10) through said common portion (23). Thus, optical power of a broad incoming beam (B1) may be effectively coupled to a relatively thin planar waveguide (10). The planar waveguide (10) may further comprise diffractive out-coupling elements (30) to direct light towards a display (400).
    Type: Grant
    Filed: November 2, 2006
    Date of Patent: April 10, 2012
    Assignee: Nokia Corporation
    Inventors: Pasi Risto Olavi Saarikko, Tapani Kalervo Levola, Pauli Laitinen
  • Publication number: 20100220956
    Abstract: A light distributing device (100) comprises a thin planar waveguide (10) and a waveguiding ridge (20). An incoming light beam (B1) coupled into the ridge (20) forms a second light beam (B2) waveguided in the ridge (20). The ridge (20) and the planar waveguide (10) have a common portion (23) such that light is further coupled from the side of the ridge (20) into the planar waveguide (10) through said common portion (23). Thus, optical power of a broad incoming beam (B1) may be effectively coupled to a relatively thin planar waveguide (10). The planar waveguide (10) may further comprise diffractive out-coupling elements (30) to direct light towards a display (400).
    Type: Application
    Filed: November 2, 2006
    Publication date: September 2, 2010
    Applicant: NOKIA CORPORATION
    Inventors: Pasi Risto Olavi Saarikko, Tapani Kalervo Levola, Pauli Laitinen