Patents by Inventor Gyu-hwan Hwang
Gyu-hwan Hwang 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).
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Publication number: 20140204608Abstract: The present invention relates to an optical film having an atypical pattern, a method for manufacturing same and a backlight assembly including the optical film. The optical film of the present invention includes: a base layer transmitting light incident from outside; and a pattern layer formed on one or both sides of the base layer, and having a surface structured of a continuously formed polygonal optical pattern having an irregular size and arrangement. Thus, hot-spots and bright lines occurring at a light source and a light entering unit may be prevented. Not only can the pattern density of the optical film be maximized to improve brightness, but strong bright points may be effectively scattered and distributed through the atypical pattern to provide the effect of improved light-shielding ability, thereby contributing to a reduction in the number of expensive optical films used in a backlight assembly and an improvement in brightness.Type: ApplicationFiled: March 20, 2014Publication date: July 24, 2014Applicant: SEKONIX CO., LTD.Inventors: Jin Sung Park, Gyu Hwan Hwang
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Patent number: 7324169Abstract: Provided are a projection optical system, a projection television, and a method of manufacturing a lens included in the projection optical system. The projection optical system includes lenses for projecting color beams onto a screen. A color filter layer, absorbing at least one of the color beams, is coated on the surface of at least one of the lenses.Type: GrantFiled: July 1, 2004Date of Patent: January 29, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Seok-il Yoon, Sung-gi Kim, Gyu-hwan Hwang, Young-Il Kah
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Patent number: 7233440Abstract: Provided is an image display screen having wide horizontal and vertical viewing angles and a projection television including the same. The image display screen includes a Fresnel screen, a first lenticular screen that widens a horizontal viewing angle and a second lenticular screen including a first portion that widens a vertical viewing angle and a second portion that prevents degradation of contrast due to external light, and a protective screen. The second lenticular screen and the protective screen can be replaced by an integrated screen or a composite screen having the characteristics of both. In addition, a pattern may be formed on the rear surface of the Fresnel screen to perform the same function as the first portion.Type: GrantFiled: June 24, 2004Date of Patent: June 19, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Seok-il Yoon, Sung-gi Kim, Gyu-hwan Hwang
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Patent number: 7139124Abstract: A screen having a wide viewing angle and a projection television including the screen are provided. The screen includes a Fresnel lens sheet for converting incident light into near-parallel light, a lenticular lens sheet including a horizontal array of vertical cylindrical lenses for horizontally emitting light, in which vertical black stripes are formed in parallel on connection portions for the cylindrical lenses, and a light diffusion film including a vertical array of horizontal cylindrical lenses for vertically emitting light, in which horizontal black stripes are formed in parallel on connection portions for the cylindrical lenses. In particular, the screen has a wide vertical viewing angle and a high contrast ratio, thereby providing a high definition image.Type: GrantFiled: February 6, 2004Date of Patent: November 21, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Seok-Il Yoon, Gyu-hwan Hwang
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Patent number: 6995811Abstract: A high-brightness projection television is provided which includes a screen having a first lens for refracting an incident beam into a convergent beam, a second lens for refracting the beam refracted by the first lens into a divergent beam, and a protection plate for protecting at least the second lens, wherein an optical emission material is included in at least one of the above elements to convert invisible lights included in the incident beam into visible lights. Alternatively, the projection television may include an optical emission layer having the optical emission material between a light source and an image generator such as a liquid crystal display (LCD). Accordingly, vertical and horizontal angles of view are increased and overall brightness of the image is improved.Type: GrantFiled: December 18, 2002Date of Patent: February 7, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Seok-il Yoon, Gyu-hwan Hwang
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Patent number: 6992837Abstract: A hybrid lens and a projection optical system having the hybrid lens are provided. The projection optical system includes a hybrid lens that is positioned along an optical path between a fluorescent surface and a screen onto which light emitted from the fluorescent surface is projected to form an image. The hybrid lens includes a spherical lens and an aspherical lens formed of plastic on at least one surface of the spherical lens. Accordingly, aberration can be corrected to improve image quality.Type: GrantFiled: September 17, 2003Date of Patent: January 31, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Seok-il Yoon, Gyu-hwan Hwang, Alexandr F. Shirankov, Oleg V. Rozhkov, Vadim V. Pozdnyakov, Alexey M. Khorokhorov
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Publication number: 20050180005Abstract: A screen having improved contrast, a wide viewing angle, and uniform luminosity and a projection system including the screen are provided. The screen includes a Fresnel lens sheet, a lenticular lens sheet including first cylindrical lenses extending vertically and formed on a surface of the lenticular lens sheet, and a protective sheet including second cylindrical lenses. The second cylindrical lenses extend horizontally and are formed on a surface of the protective sheet. A tinted layer is formed on surfaces of the second cylindrical lenses. The projection system forms on an image on the screen. The image is generated by a display device and magnified and projected by a projection lens unit. Therefore, a viewer can watch the projection system from an angle wider than that provided by conventional projection systems.Type: ApplicationFiled: December 10, 2004Publication date: August 18, 2005Inventors: Gyu-hwan Hwang, Seok-il Yoon, Young-il Kah
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Publication number: 20050140831Abstract: A projection optical system and a projection television employing the same are provided. The projection optical system includes a lens module and an electron beam tube optical module. The lens module includes a plastic power lens and a hybrid lens. The hybrid lens includes a spherical, biconvex, glass lens and an aspheric lens layer formed on at least one face of the spherical lens. The electron beam tube optical module includes a C-shaped aberration correction device, a window, and a coolant disposed between the window and the aberration correction device. Accordingly, the projection television can provide high quality pictures. In addition, it is possible to reduce the manufacturing costs of the projection television.Type: ApplicationFiled: October 29, 2004Publication date: June 30, 2005Inventors: Seok-il Yoon, Gyu-hwan Hwang, Alexander Shirankov, Vadim Pozdnyakov, Alexey Khorokhorov, Maxim Frolov
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Publication number: 20050083588Abstract: Provided are a projection optical system, a projection television, and a method of manufacturing a lens included in the projection optical system. The projection optical system includes lenses for projecting color beams onto a screen. A color filter layer, absorbing at least one of the color beams, is coated on the surface of at least one of the lenses.Type: ApplicationFiled: July 1, 2004Publication date: April 21, 2005Inventors: Seok-il Yoon, Sung-gi Kim, Gyu-hwan Hwang, Young-il Kah
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Patent number: 6859314Abstract: A screen for a projector includes a Fresnel lens which concentrates incident light, a lenticular lens arranged on a front surface of the Fresnel lens and which forms an image by focusing light passing through the Fresnel lens, a protective panel installed on a front surface of the lenticular lens and which protects the lenticular lens, and a reflection reducing portion formed on one surface of the protective panel, wherein the reflection reducing portion reduces reflection of light by diffusely reflecting the light, and wherein the reflection reducing portion includes a core member capable of being emitted externally.Type: GrantFiled: October 15, 2003Date of Patent: February 22, 2005Assignee: Samsung Electronics Co., Ltd.Inventors: Seok-il Y Yoon, Gyu-hwan Hwang
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Publication number: 20050018315Abstract: Provided is a method of manufacturing a hybrid aspherical lens. The method includes processing a spherical lens, depositing an aspherical lens material layer on the spherical lens, and pressing a compression mold with an aspherical surface onto the aspherical lens material layer to form the hybrid aspherical lens over the spherical lens. Thus, a hybrid aspherical lens without shaping errors can be manufactured using a simple process.Type: ApplicationFiled: April 27, 2004Publication date: January 27, 2005Inventors: Seok-il Yoon, Gyu-hwan Hwang
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Publication number: 20050018286Abstract: Provided is an image display screen having wide horizontal and vertical viewing angles and a projection television including the same. The image display screen includes a Fresnel screen, a first lenticular screen that widens a horizontal viewing angle and a second lenticular screen including a first portion that widens a vertical viewing angle and a second portion that prevents degradation of contrast due to external light, and a protective screen. The second lenticular screen and the protective screen can be replaced by an integrated screen or a composite screen having the characteristics of both. In addition, a pattern may be formed on the rear surface of the Fresnel screen to perform the same function as the first portion.Type: ApplicationFiled: June 24, 2004Publication date: January 27, 2005Inventors: Seok-il Yoon, Sung-gi Kim, Gyu-hwan Hwang
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Publication number: 20040223217Abstract: A screen having a wide viewing angle and a projection television including the screen are provided. The screen includes a Fresnel lens sheet for converting incident light into near-parallel light, a lenticular lens sheet including a horizontal array of vertical cylindrical lenses for horizontally emitting light, in which vertical black stripes are formed in parallel on connection portions for the cylindrical lenses, and a light diffusion film including a vertical array of horizontal cylindrical lenses for vertically emitting light, in which horizontal black stripes are formed in parallel on connection portions for the cylindrical lenses. In particular, the screen has a wide vertical viewing angle and a high contrast ratio, thereby providing a high definition image.Type: ApplicationFiled: February 6, 2004Publication date: November 11, 2004Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Seok-il Yoon, Gyu-hwan Hwang
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Publication number: 20040136065Abstract: A screen for a projector includes a Fresnel lens which concentrates incident light, a lenticular lens arranged on a front surface of the Fresnel lens and which forms an image by focusing light passing through the Fresnel lens, a protective panel installed on a front surface of the lenticular lens and which protects the lenticular lens, and a reflection reducing portion formed on one surface of the protective panel, wherein the reflection reducing portion reduces reflection of light by diffusely reflecting the light, and wherein the reflection reducing portion includes a core member capable of being emitted externally.Type: ApplicationFiled: October 15, 2003Publication date: July 15, 2004Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Seok-il Yoon, Gyu-hwan Hwang
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Publication number: 20040114057Abstract: A hybrid lens and a projection optical system having the hybrid lens are provided. The projection optical system includes a hybrid lens that is positioned along an optical path between a fluorescent surface and a screen onto which light emitted from the fluorescent surface is projected to form an image. The hybrid lens includes a spherical lens and an aspherical lens formed of plastic on at least one surface of the spherical lens. Accordingly, aberration can be corrected to improve image quality.Type: ApplicationFiled: September 17, 2003Publication date: June 17, 2004Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Seok-il Yoon, Gyu-hwan Hwang, Alexandr F. Shirankov, Oleg V. Rozhkov, Vadim V. Pozdnyakov, Alexey M. Khorokhorov
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Publication number: 20040036405Abstract: A screen for display devices and manufacturing method thereof capable of enhancing optical characteristics as well as increasing customers' satisfaction through functional substances. The screen for display devices has a front panel formed by coating on the upper surface of a screen substrate a substance mixed with organic or inorganic functional fine particles. The organic or inorganic functional fine particles contain at least one or more functional substances for anti-bacteria, aroma, and deodorization. Further, the fine particles are encapsulated in predetermined sizes so as not to obstruct optical characteristics, and the capsules may be formed in circle-shaped, ellipse-shaped, or amorphous class 1-shaped grain sizes. In non-glare treatments, a convexoconcave-shaped front panel is formed to enhance optical characteristics by mixing a non-glare treatment substance and a fine particle-mixed substance.Type: ApplicationFiled: May 6, 2003Publication date: February 26, 2004Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Gyu-hwan Hwang
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Patent number: 6603604Abstract: A screen of a projection television may include a Fresnel lens for converting an incident light beam emitted from an image source into a parallel beam, a lenticular lens formed by sequentially arranging multiple lens elements having a column shape parallel to one another for forming an image from the parallel beam output from the Fresnel lens and spreading the formed image, and a protective panel installed on the front surface of the lenticular lens for protecting the lenticular lens. The Fresnel lens may include a base substrate and a lens unit contacting one side of the base substrate, patterns having a saw-toothed shape formed on a surface of the lens unit facing a lenticular lens, and portions of each pattern corresponding to a sharp portion of a sawtooth may be a processed curved surface having a predetermined curvature.Type: GrantFiled: September 9, 2002Date of Patent: August 5, 2003Assignee: Samsung Electronics Co., Ltd.Inventor: Gyu-hwan Hwang
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Publication number: 20030142242Abstract: A high-brightness projection television is provided which includes a screen having a first lens for refracting an incident beam into a convergent beam, a second lens for refracting the beam refracted by the first lens into a divergent beam, and a protection plate for protecting at least the second lens, wherein an optical emission material is included in at least one of the above elements to convert invisible lights included in the incident beam into visible lights. Alternatively, the projection television may include an optical emission layer having the optical emission material between a light source and an image generator such as a liquid crystal display (LCD). Accordingly, vertical and horizontal angles of view are increased and overall brightness of the image is improved.Type: ApplicationFiled: December 18, 2002Publication date: July 31, 2003Applicant: Samsung Electronics Co., Ltd.Inventors: Seok-il Yoon, Gyu-hwan Hwang
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Patent number: D1025167Type: GrantFiled: April 28, 2023Date of Patent: April 30, 2024Inventors: Han Wool Choi, Jun Hwan Park, Seok Young Youn, Hun Keon Ko, Ho Seong Kang, Hyeon Jeong An, Gyu Jong Hwang, Soo Kyoung Kang, Dong Jin Hyun, Geun Sang Yu
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Patent number: D1025168Type: GrantFiled: April 28, 2023Date of Patent: April 30, 2024Inventors: Han Wool Choi, Jun Hwan Park, Seok Young Youn, Hun Keon Ko, Ho Seong Kang, Hyeon Jeong An, Gyu Jong Hwang, Soo Kyoung Kang, Dong Jin Hyun, Geun Sang Yu