Patents Assigned to LETINAR CO., LTD
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Publication number: 20240176153Abstract: Disclosed herein are a lens holder, an optical module including the lens holder, and a glasses-type augmented reality provision device. According to an embodiment of the present invention, there is provided a lens holder including: frames configured to be coupled to a lens and fix the lens; and a display unit holder fixing part configured to be connected to the frames and accommodate a display unit holder.Type: ApplicationFiled: September 11, 2023Publication date: May 30, 2024Applicant: LETINAR CO., LTDInventors: Young Su PARK, Jae Min KIM
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Publication number: 20240177432Abstract: Disclosed herein is an optical device for augmented reality having a ghost image prevention function. The optical device includes: an image output unit configured to output virtual image light; an optical means configured such that the virtual image light from the image output unit propagates through an inside thereof and real object image light is transmitted therethrough toward a pupil; a first optical element disposed inside the optical means, and configured to transfer the virtual image light to a plurality of second optical elements; and the plurality of second optical elements disposed inside the optical means, and configured to provide a virtual image to the user by transferring the virtual image light toward the user's pupil. The optical means has a first surface, a second surface, and a third surface. The third surface is formed to have an inclination angle ?in with respect to a normal line in a forward direction from the user's pupil and the image output unit is spaced apart from the third surface.Type: ApplicationFiled: September 5, 2023Publication date: May 30, 2024Applicant: LETINAR CO., LTDInventor: Jeong Hun HA
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Publication number: 20240176121Abstract: 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: February 6, 2024Publication date: May 30, 2024Applicant: LETINAR CO., LTDInventors: Jeong Hun HA, Soon Gi PARK
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Publication number: 20240151978Abstract: The present invention provides an optical device for augmented reality having a refractive space, the optical device including: a first optical element configured to transfer virtual image light to a second optical element; the second optical element configured to transfer the virtual image light toward the pupil of an eye of a user; an optical means configured such that the first optical element and the second optical element are embedded therein; and a refractive space formed inside the optical means; wherein the refractive space has a first surface and a second surface; and wherein the virtual image light output from the image output unit enters the first optical element through the second surface of the refractive space, is reflected by the first optical element and then output through the second surface of the refractive space, and is then transferred to the second optical element.Type: ApplicationFiled: December 17, 2021Publication date: May 9, 2024Applicant: LETINAR CO., LTDInventor: Kwang Bok LEE
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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