Patents Assigned to Sekonix Co., Ltd.
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Patent number: 7711231Abstract: Disclosed are an optical display device producing uniform light distribution and a method of fabricating such devices. The optical display device has waveguides arranged in vertical and horizontal directions. The waveguide has a conical shape whose cross-section decreases towards the light-projection side thereof. At least one of the size, height, spacing, and refraction index of the waveguide is designed to be different for each section, depending on an incident angle and/or intensity of light inputted from a light source. Therefore, the intensity of projected light can be made uniform over all sections of the optical device.Type: GrantFiled: February 16, 2005Date of Patent: May 4, 2010Assignee: Sekonix Co., Ltd.Inventors: Gyuhwan Hwang, Youngbin Yu, Hyunsoo Lee
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Patent number: 7558006Abstract: Disclosed is a high-definition imaging lens assembly that can reduce the length of an optical path. The high-definition imaging lens assembly includes: first, second, third, and fourth lenses that are sequentially disposed from an object along an optical axis, wherein the first lens has positive refractive power and the second lens has negative refractive power, the first and second lenses are made of optical glass, a front surface of the first lens and a rear surface of the second lens are spherical, and a rear surface of the first lens and a front surface of the second lens that are substantially planar are bonded to each other. The third and fourth lenses are made of plastic and are spaced each other and at least one surface of each of the third and fourth lenses is aspherical.Type: GrantFiled: July 10, 2007Date of Patent: July 7, 2009Assignee: Sekonix Co., Ltd.Inventors: Soon Cheol Choi, Chang Seong Jegal, Mi Young Kim
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Patent number: 7450814Abstract: Disclosed is an optical device for a display having a tapered waveguide and a method of fabricating such devices. In order to reduce light absorption inside the waveguide, a light-absorbing material is coated on the front surface only of the optical device Alternatively, a space adjacent to the waveguide is coated with a material having a refraction index different from the waveguide, preferably, lower than that of the waveguide and then filled with a light-absorbing material. In addition, a large- and uniform-sized light-absorbing material may be filled in the space. The optical device has an improved light efficiency, and thus exhibits an excellent luminance, as compared with the conventional ones, when using an identical light source. Furthermore, the fabrication method can produce such optical devices in a simplified manner, thus improving production efficiency.Type: GrantFiled: February 16, 2005Date of Patent: November 11, 2008Assignee: Sekonix Co., LtdInventors: Gyuhwan Hwang, Youngbin Yu, Hyunsoo Lee
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Publication number: 20080260336Abstract: Disclosed arm an optical display device producing uniform light distribution and a method of fabricating such devices. The optical display device has waveguides arranged in vertical and horizontal directions. The waveguide has a conical shape whose cross-section decreases towards the light-projection side thereof. At least one of the size, height, spacing, and refraction index of the waveguide is designed to be different for each section, depending on an incident angle and/or intensity of light inputted from a light source. Therefore, the intensity of projected light can be made uniform over all sections of the optical device.Type: ApplicationFiled: February 16, 2005Publication date: October 23, 2008Applicant: Sekonix Co., Ltd.Inventors: Gyuhwan Hwang, Youngbin Yu, Hyunsoo Lee
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Publication number: 20080198604Abstract: There is provided a lighting apparatus using a filter and a condenser for LED illumination in which an optical filter to obtain diverse optical patterns as a user desires is connected to a condenser for LED illumination without using any additional device. The lighting apparatus in which the optical filter can be exchanged comprises: a LED for generating a light source for illumination, a condenser for concentrating the light source generated from the LED, and an optical filter connected to the condenser, for providing an optical pattern, wherein the optical filter is connected to the condenser so as to be attachable to or detachable from the condenser.Type: ApplicationFiled: January 14, 2008Publication date: August 21, 2008Applicant: Sekonix Co., Ltd.Inventors: Jin-Ho Kim, Shung-Hoon Hwang, Hee-Joong Lee, Sang-Cheon Jeon, Mu-Gile Choi
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Patent number: 7411742Abstract: A focusing lens for an LED is provided.Type: GrantFiled: March 26, 2007Date of Patent: August 12, 2008Assignee: Sekonix Co., Ltd.Inventors: Jin-Ho Kim, Shung-Hoon Hwang, Hee-Joong Lee
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Publication number: 20080174885Abstract: Disclosed is a high-definition imaging lens assembly that can reduce the length of an optical path. The high-definition imaging lens assembly includes: first, second, third, and fourth lenses that are sequentially disposed from an object along an optical axis, wherein the first lens has positive refractive power and the second lens has negative refractive power, the first and second lenses are made of optical glass, a front surface of the first lens and a rear surface of the second lens are spherical, and a rear surface of the first lens and a front surface of the second lens that are substantially planar are bonded to each other. The third and fourth lenses are made of plastic and are spaced each other and at least one surface of each of the third and fourth lenses is aspherical.Type: ApplicationFiled: July 10, 2007Publication date: July 24, 2008Applicant: SEKONIX CO., LTD.Inventors: Soon Cheol Choi, Chang Seong Jegal, Mi Young Kim
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Publication number: 20080011911Abstract: Provided is a bracket for an illumination device in an optical engine. The bracket, which includes a body to be fixed to a light tunnel, and fixing pieces, connected to but spaced apart from the body, to be fixed to a barrel, comprises: arm parts which independently protrude from both side ends of the body, each arm part being bent to form a step and to be connected to either side of the fixing piece. In the bracket according to the present invention, since the arm parts have the resilience, the light tunnel is easily controlled by the resilience of the arm parts in addition to the elasticity of springs, and the reliability of the product is improved by reducing a failure ratio of the product.Type: ApplicationFiled: January 16, 2007Publication date: January 17, 2008Applicant: SEKONIX CO, LTD.Inventors: Dong-Hwan Kim, Jin-Ho Kim, Jong-Kyu Hong
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Publication number: 20080002408Abstract: Provided is a controller of an illumination system in an optical engine, in which a rear end of a light tunnel is fixed to a barrel and a front end of the light tunnel is movably installed inside the barrel, comprising: control openings being respectively bored through an upper part of the barrel; control screws being respectively connected to the control openings and moving the light tunnel in an oblique direction, each control screw with an end being obliquely in contact with the light tunnel; and an elastic body being installed in the barrel, opposite to the control screws, to elastically support the light tunnel. The controller of the illumination system controls the light tunnel to be moved in the oblique direction in the barrel, thereby enabling the light tunnel to be quickly and easily moved to be controlled, improving the controllability and shortening the control time.Type: ApplicationFiled: January 16, 2007Publication date: January 3, 2008Applicant: SEKONIX CO, LTD.Inventors: Shung-Hoon Hwang, Byeong-Nam Ann, Sang-Cheon Jeon
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Publication number: 20070223867Abstract: Disclosed is an optical device for a display having a tapered waveguide and a method of fabricating such devices. In order to reduce light absorption inside the waveguide, a light-absorbing material is coated on the front surface only of the optical device Alternatively, a space adjacent to the waveguide is coated with a material having a refraction index different from the waveguide, preferably, lower than that of the waveguide and then filled with a light-absorbing material. In addition, a large- and uniform-sized light-absorbing material may be filled in the space. The optical device has an improved light efficiency, and thus exhibits an excellent luminance, as compared with the conventional ones, when using an identical light source. Furthermore, the fabrication method can produce such optical devices in a simplified manner, thus improving production efficiency.Type: ApplicationFiled: February 16, 2005Publication date: September 27, 2007Applicant: SEKONIX CO., LTD.Inventors: Gyuhwan Hwang, Youngbin Yu, Hyunsoo Lee
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Patent number: 7224537Abstract: Disclosed herein is a diffusion lens for diffusing LED light. The diffusion lens of the present invention includes a bottom surface, a conic first lens surface, a second lens surface, and a third lens surfaces. According to the present invention, it is easy to manufacture a mold required to manufacture a diffusion lens for diffusing LED light, and to eject the diffusion lens after molding has been performed, and it can uniformly diffuse LED light in the central direction, the diagonal direction and the lateral direction of the lens.Type: GrantFiled: May 23, 2006Date of Patent: May 29, 2007Assignee: Sekonix Co., Ltd.Inventor: Soon Cheol Choi
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Patent number: D576325Type: GrantFiled: September 27, 2007Date of Patent: September 2, 2008Assignee: Sekonix Co. LtdInventors: Jin-Ho Kim, Sang-Cheon Jeon, Shung-Hoon Hwang