Patents Assigned to LETINAR CO., LTD
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Publication number: 20240119677Abstract: The present invention provides an optical device for augmented reality having a ghost image blocking function. The optical device includes: an optical means configured to transmit at least part of real object image light, which is image light output from a real object, therethrough toward the pupil of an eye of a user; a first reflective unit disposed inside the optical means, and configured to transfer augmented reality image light, which is image light corresponding to an image for augmented reality output from an image output unit, to a second reflective unit; and the second reflective unit disposed inside the optical means, and configured to transfer the augmented reality image light to the pupil of the eye of the user by reflecting the augmented reality image light to the pupil of the eye of the user, thereby providing the image for augmented reality to the user.Type: ApplicationFiled: October 22, 2020Publication date: April 11, 2024Applicant: LETINAR CO., LTDInventor: Jeong Hun HA
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Patent number: 11927733Abstract: The present invention relates to an image compensation device for an image for augmented reality. The image compensation device includes: a compensation function determination unit configured to determine a compensation function for compensating the luminance information of an observed image observed by a user through an optical device for augmented reality when an original image for augmented reality is output from an image output unit; and a pre-compensated image information generation unit configured to generate pre-compensated image information for augmented reality based on the compensation function determined by the compensation function determination unit and original image information for augmented reality.Type: GrantFiled: June 16, 2021Date of Patent: March 12, 2024Assignee: LETINAR CO., LTDInventors: Jeong Hun Ha, Soon Gi Park
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Publication number: 20240077720Abstract: Disclosed herein is an optical device for augmented reality capable of providing an expanded eyebox through polarization. The optical device for augmented reality includes: an image output unit configured to output a first virtual image light polarized in a first direction and a second virtual image light polarized in a second direction; an optical means configured to transmit real object image light therethrough to the pupil of an eye of a user; a first optical element disposed in the optical means, and configured to provide a first virtual image by transferring only the first one of the first and second virtual image lights to the pupil of the user; and a second optical element disposed in the optical means, and configured to provide a second virtual image by transferring only the second one of the first and second virtual image lights to the pupil of the user.Type: ApplicationFiled: August 17, 2023Publication date: March 7, 2024Applicant: LETINAR CO., LTDInventors: Jeong Hun HA, Kwang Bok LEE
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Publication number: 20240019706Abstract: The present invention provides an optical device for augmented reality having a function of adjusting the depth of a virtual image, the optical device including: a display unit configured to display a virtual image; focusing optics configured to refract or reflect virtual image light; a reflective unit including a plurality of reflective modules configured to provide the virtual image to a user; an optical means provided with the reflective unit installed therein, and configured to transmit real object image light toward a pupil of the user's eye; a position adjustment device configured to move at least one of the display unit and the focusing optics in a direction parallel to the optical axis of the focusing optics; a focal length tracking unit configured to measure the focal length of the user; and a control unit configured to control the movement of the position adjustment device.Type: ApplicationFiled: July 9, 2021Publication date: January 18, 2024Applicant: LETINAR CO., LTDInventors: Jeong Hun HA, Soon Gi PARK
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Publication number: 20230367128Abstract: The present invention provides a compact optical device for augmented reality, the compact optical device including: an optical means configured to transmit at least part of real object image light therethrough toward the pupil of a user's eye; a first reflective means embedded and disposed inside the optical means, and configured to transfer augmented reality image light, which is image light corresponding to an image for augmented reality output from an image output unit, to a second reflective means; and the second reflective means including a plurality of reflective units embedded and disposed in the optical means to transfer the augmented reality image light, transferred from the first reflective means, to the pupil of the user's eye by reflecting the augmented reality image light toward the pupil; wherein the optical means has first and second surfaces, and a method for manufacturing an optical means used in the same.Type: ApplicationFiled: July 8, 2021Publication date: November 16, 2023Applicant: LETINAR CO., LTDInventor: Jeong Hun HA
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Publication number: 20230333358Abstract: The present invention provides an optical device for augmented reality having an optical structure arranged in a straight line, the optical device including: a reflective means configured to transfer augmented reality image light, output from an image output unit, to the pupil of a user's eye by reflecting the augmented reality image light toward the pupil, thereby providing an image for augmented reality to the user; and an optical means configured such that the reflective means is buried and disposed therein, and also configured to transmit at least part of real object image light, output from a real object, therethrough toward the pupil of the user's eye; wherein the optical unit has a first surface through which the augmented reality image light and the at least part of the real object image light are output and a second surface which the real object image light enters.Type: ApplicationFiled: June 17, 2021Publication date: October 19, 2023Applicant: LETINAR CO., LTDInventor: Jeong Hun HA
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Publication number: 20230296897Abstract: The present invention provides a compact optical device for augmented reality, the compact optical device including: an optical means configured to transmit at least part of real object image light therethrough toward the pupil of an eye of a user; a first reflective unit disposed inside the optical unit and configured to transfer augmented reality image light which is image light corresponding to an image for augmented reality output from an image output unit to a second reflective unit; and the second reflective unit disposed inside the optical means and configured to transfer the augmented reality image light transferred from the first reflective unit toward the pupil of the eye of the user by reflecting it, thereby proving an image for augmented reality to the user.Type: ApplicationFiled: June 15, 2021Publication date: September 21, 2023Applicant: LETINAR CO., LTDInventors: Jeong Hun HA, Jae Hyeok KIM
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Patent number: 11754837Abstract: The present invention provides an optical device for augmented reality having an external light leakage prevention function, the optical device including: an image output unit configured to output image light corresponding to an image for augmented reality; at least one reflective unit configured to transfer the image light to the pupil of an eye of a user by reflecting the image light; and an optical means configured such that the reflective unit is disposed therein and it transmits at least part of image light, output from a real object, therethrough toward the pupil; wherein the at least one reflective unit is formed to have a size of 4 mm or less, and includes a first surface configured to reflect the former image light toward the pupil and a second surface which is a surface opposite to the first surface; and wherein the second surface is made of a light absorbing material.Type: GrantFiled: April 20, 2020Date of Patent: September 12, 2023Assignee: LETINAR CO., LTDInventor: Jeong Hun Ha
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Publication number: 20230273416Abstract: The present invention relates to an image compensation device for an image for augmented reality. The image compensation device includes: a compensation function determination unit configured to determine a compensation function for compensating the luminance information of an observed image observed by a user through an optical device for augmented reality when an original image for augmented reality is output from an image output unit; and a pre-compensated image information generation unit configured to generate pre-compensated image information for augmented reality based on the compensation function determined by the compensation function determination unit and original image information for augmented reality.Type: ApplicationFiled: June 16, 2021Publication date: August 31, 2023Applicant: LETINAR CO., LTDInventors: Jeong Hun HA, Soon Gi PARK
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Publication number: 20230251493Abstract: The present invention relates to a method of manufacturing an optical device, and provides a method of manufacturing an optical device, which includes: preparing first and second optical elements having a pair of corresponding surfaces; forming a reflective unit on the surface of the first optical element selected from the pair of corresponding surfaces; and forming an optical device by bringing the first and second optical elements into close contact with each other and fastening them to each other.Type: ApplicationFiled: April 13, 2023Publication date: August 10, 2023Applicant: LETINAR CO., LTDInventor: Jeong Hun HA
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Publication number: 20230237745Abstract: The present invention relates to an optical device for augmented reality, and provides a lightweight optical device for augmented reality using a state change optical element, the lightweight optical device including: an optical means configured to transmit at least part of real object image light therethrough toward the pupil of an eye of a user; and a reflective unit disposed inside the optical means, and configured to transfer augmented reality image light, output from an image output unit, toward the pupil of the eye of the user by reflecting the augmented reality image light, thereby providing an image for augmented reality to the user; wherein the reflective unit is formed of a state change optical element whose reflectance for the reflection of light and transmittance are changed in response to a control signal of a controller.Type: ApplicationFiled: March 18, 2021Publication date: July 27, 2023Applicant: LETINAR CO., LTDInventor: Jeong Hun HA
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Patent number: 11656460Abstract: The present invention relates to a method of manufacturing an optical device, and provides a method of manufacturing an optical device, which includes: preparing first and second optical elements having a pair of corresponding surfaces; forming a reflective unit on the surface of the first optical element selected from the pair of corresponding surfaces; and forming an optical device by bringing the first and second optical elements into close contact with each other and fastening them to each other.Type: GrantFiled: November 29, 2018Date of Patent: May 23, 2023Assignee: LETINAR CO., LTDInventor: Jeong Hun Ha
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Patent number: 11586044Abstract: Disclosed herein is a compact optical device for augmented reality having a ghost image blocking function and a wide field of view. The compact optical device includes: an optical means configured to transmit at least part of real object image light therethrough toward the pupil of an eye of a user; a first reflective means disposed inside the optical means and configured to transfer the augmented reality image light output from an image output unit to a second reflective means; and a second reflective means disposed inside the optical means and to reflect the augmented reality image light, transferred from the first reflective means, and transfer the augmented reality image light to the pupil of the eye of the user, thereby providing an image for augmented reality to the user.Type: GrantFiled: November 2, 2020Date of Patent: February 21, 2023Assignee: LETINAR CO., LTDInventor: Jeong Hun Ha
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Publication number: 20230033762Abstract: Disclosed herein is an optical device for augmented reality having improved light efficiency. The optical device includes: a reflective means configured to transfer augmented reality image light to the pupil of a user by reflecting the augmented reality image light toward the pupil; and an optical means adapted such that the reflective means is embedded and disposed therein, and configured to transmit at least part of real object image light therethrough toward the pupil of the user. The optical means includes a first surface and a second surface. The reflective means includes a plurality of reflective units having a size of 4 mm or less that are embedded and arranged inside the optical means. At least two reflective units of the plurality of reflective units are arranged closer to the second surface of the optical means as the distance from the image output unit increases.Type: ApplicationFiled: October 6, 2022Publication date: February 2, 2023Applicant: LETINAR CO., LTDInventor: Jeong Hun HA
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Publication number: 20230034862Abstract: Disclosed herein is a compact optical device for augmented reality having a ghost image blocking function and a wide field of view. The compact optical device includes: an optical means configured to transmit at least part of real object image light therethrough toward the pupil of an eye of a user; a first reflective means disposed inside the optical means and configured to transfer the augmented reality image light output from an image output unit to a second reflective means; and a second reflective means disposed inside the optical means and to reflect the augmented reality image light, transferred from the first reflective means, and transfer the augmented reality image light to the pupil of the eye of the user, thereby providing an image for augmented reality to the user.Type: ApplicationFiled: October 12, 2022Publication date: February 2, 2023Applicant: LETINAR CO., LTDInventor: Jeong Hun HA
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Publication number: 20230023525Abstract: The present invention is directed to an optical device for augmented reality using total internal reflection, the optical device including: an optical means for transmitting at least part of real object image light toward the pupil of an eye of a user; wherein a total internal reflection space configured to transfer augmented reality image light, output from an image output unit, toward the pupil of the eye of the user is formed inside the optical means; and wherein the total internal reflection space is filled with a medium having an index of refraction lower than the index of refraction of the optical means, and the augmented reality image light transferred to the total internal reflection space through the inside of the optical means is reflected by total internal reflection on the total internal reflection space and then transferred toward the pupil of the eye of the user.Type: ApplicationFiled: January 7, 2021Publication date: January 26, 2023Applicant: LETINAR CO., LTDInventors: Jeong Hun HA, Jin Ho JUNG
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Patent number: 11556007Abstract: The present invention relates to an apparatus equipped with a depth of field control function for enabling augmented reality, which is capable of controlling the depth of field and focus and also preventing an image from being blurred due to diffraction by using a pseudo-pinhole effect. The apparatus includes: a display unit configured to generate a virtual image; a circular depth of field control unit configured to have a size in a range from 50 to 700 ?m, and also configured to reflect the virtual image generated in the display unit, to increase the depth of field of the virtual image, and to then enable the virtual image to reach an eye of the user; and a frame part configured such that the display unit and the depth of field control unit are installed thereon or therein, and also configured to enable the user to wear the apparatus for enabling augmented reality.Type: GrantFiled: June 3, 2020Date of Patent: January 17, 2023Assignee: LETINAR CO., LTDInventor: Jeong Hun Ha
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Patent number: 11536963Abstract: Disclosed herein is an optical device for augmented reality having improved light efficiency. The optical device includes: a reflective means configured to transfer augmented reality image light to the pupil of a user by reflecting the augmented reality image light toward the pupil; and an optical means adapted such that the reflective means is embedded and disposed therein, and configured to transmit at least part of real object image light therethrough toward the pupil of the user. The optical means includes a first surface and a second surface. The reflective means includes a plurality of reflective units having a size of 4 mm or less that are embedded and arranged inside the optical means. At least two reflective units of the plurality of reflective units are arranged closer to the second surface of the optical means as the distance from the image output unit increases.Type: GrantFiled: September 17, 2020Date of Patent: December 27, 2022Assignee: LETINAR CO., LTD.Inventor: Jeong Hun Ha
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Publication number: 20220291508Abstract: The present invention is directed to an optical apparatus for augmented reality with a vision correction function. The optical apparatus for augmented reality with a vision correction function includes: an image output unit configured to output augmented reality image light; a reflective unit configured to transfer the augmented reality image light to the pupil of a user's eye; and an optical means configured such that the reflective unit is disposed therein, and configured to transmit therethrough at least part of real object image light toward the pupil of the user's eye; wherein the optical means includes a first surface and a second surface; wherein the reflective unit is disposed inside between the first and second surfaces of the optical means; and wherein at least any one of the first and second surfaces of the optical means is formed as a curved surface.Type: ApplicationFiled: August 19, 2020Publication date: September 15, 2022Applicant: LETINAR CO., LTDInventors: Jeong Hun HA, Soon Gi PARK
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Publication number: 20220276471Abstract: The present invention is directed to a camera module using a small reflective unit and an optical device for augmented reality using the same, and provides a camera module using a small reflective unit, the camera module including a lens unit configured such that one or more lenses are disposed therein and an image sensor configured to convert image light, incident through the lens unit, into an electrical signal and output the electrical signal, the camera module further including a reflective unit configured to transfer incident image light to the lens unit by reflecting the incident image light; wherein the reflective surface of the reflective unit is disposed to be inclined with respect to the optical axis of incident light in order to reflect incident image light to the lens unit, and acts as an aperture for the incident light.Type: ApplicationFiled: July 3, 2020Publication date: September 1, 2022Applicant: LETINAR CO., LTDInventor: Jeong Hun HA