Patents by Inventor Hui-Lung Kuo
Hui-Lung Kuo 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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Patent number: 8023080Abstract: A high transmittance brightness enhanced optical element for backlight modules and liquid crystal display device is disclosed. The brightness enhanced polarizing optical element comprises a reflective polarizer film, a phase retardation film, and a polarization enhancement film. The reflective polarizer film provides a function of selectively reflecting right-handness circularly polarized light or left-handness circularly polarized light and will transmit the other one of them. The one was selectively reflected will be recombined with the light source or the backlight and re-direct toward the reflective polarizer. The portions of the reflective light will be recombined with the fresh light from the light source as above and the processes repeatedly. As a result, almost all of the light transmit the reflective polarizer and in the same circular polarization. The light is then transmitted the phase retardation film and converted to a polarized light with another optical axis.Type: GrantFiled: July 6, 2009Date of Patent: September 20, 2011Assignee: Industrial Technology Research InstituteInventors: Hui-Lung Kuo, Ping-Chen Chen, Yi-Ping Hsieh, Pao-Ju Hsieh, Yu-Hsun Wu
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Publication number: 20110141406Abstract: A low color variation optical device is provided. The optical device includes a cholesteric liquid crystal film, a first phase retardation film disposed above the cholesteric liquid crystal film and a second phase retardation film disposed below the cholesteric liquid crystal film, wherein the second phase retardation film includes a plurality of molecules with a tilted and twisted arrangement. The invention also provides a backlight module and a liquid crystal display including a low color variation optical device.Type: ApplicationFiled: April 9, 2010Publication date: June 16, 2011Applicant: Industrial Technology Research InstituteInventors: Ying-Jui Lin, Hui-Lung Kuo, Ping-Chen Chen, Mei-Chih Peng, Yi-Ping Hsieh
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Publication number: 20100321626Abstract: A display material and method and device thereof are provided. The display material is first formed by evenly mixing appropriate weight ratios of DFLCs, incurable nanoparticles, curable nanoparticles, and a photoinitiator. Next, the evenly mixed mixture is disposed between two parallel conducting transparent substrates, wherein an electrical field is conducted thereto and the DFLCs therein aligned to the direction of the applied electrical field. Concurrently, under the applied electrical field, some curable nanoparticles within the evenly mixed mixture, form short nano chains, initiating the photo initiator. The frame structure of short nano chains stabilize both the clear and scattering states, thereby the bistable characteristic was improved and the contrast ratio was enhanced as applied to bistable displays.Type: ApplicationFiled: September 18, 2009Publication date: December 23, 2010Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Pao-Ju Hsieh, Hui-Lung Kuo
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Patent number: 7839568Abstract: A bi-stable projection screen includes a light diffusion unit and a bi-stable display unit stacked together. The bi-stable display unit, when actuated, selectively operates in a first mode or a second mode. When operating in the first mode (e.g., a transmission mode or a reflection mode), the bi-stable display unit receives a projection light from a front projection or a rear projection, and emits the projection light after modulation. When operating in the second mode (a non-transmission mode or a non-reflection mode), the bi-stable display unit is a pattern to become a part of a scene. The light diffusion unit receives and diffuses the modulated projection light to be perceived by human eyes.Type: GrantFiled: March 27, 2008Date of Patent: November 23, 2010Assignee: Industrial Technology Research InstituteInventors: Chun-Hsiang Wen, Wen-Hsien Wang, Yaw-Ting Wu, Hui-Lung Kuo
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Publication number: 20100177266Abstract: The present invention provides an optical film with functions of light collimating, light polarization for brightness enhancement and limiting viewing angle and a method for preparing the same. The optical film includes a plurality of layers of a cholesteric liquid crystal film bound together via an optical adhesive and a quarter-wavelength retardation plate bound with the cholesteric liquid crystal film via the optical adhesive. Therein, at least one layer of the cholesteric liquid crystal film has a polarized separated wavelength range covering the wavelength range of visible light of three primary colors of red, green and blue.Type: ApplicationFiled: August 18, 2009Publication date: July 15, 2010Inventors: Hui-Lung KUO, Mei-Chih PENG, Pin-Chen CHEN, Ying-Jui LIN
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Publication number: 20100171921Abstract: A liquid crystal display (LCD) includes two glass substrates, a liquid crystal unit formed by sandwiching a liquid crystal layer between the two glass substrates, a first polarizing film, and a second polarizing film. In another example, the LCD further includes a diffuse reflective film formed on the other side of the second polarizing film. In another example, the second polarizing film is replaced by a reflective film. The liquid crystal layer is composed of an antiferroelectric (including intermediate antiferroelectric) smectic liquid crystal material, and a birefringence of the liquid crystal layer changes along with an electric field applied to the liquid crystal layer.Type: ApplicationFiled: January 6, 2009Publication date: July 8, 2010Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Alexei Removich Khokhlov, Alexander Vyacheslavovich Emelyanenko, Evgeny Pavlovich Pozhidaev, Nikolay Mikhailovich Shtykov, Vadim Evgenievich Molkin, Hui-Lung Kuo, Yi-Ping Hsieh
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Publication number: 20100142048Abstract: A light source module for generating polarized light includes a light emitting element, a reflector, and an optical element. The light emitting element generates a light ray, and the reflector reflects the light ray towards the optical element. The optical element includes a light splitting face and a reflection face. The light splitting face receives the light ray, and an angle between the light splitting face and the incident light ray is at about a Brewster's Angle. After the light ray is irradiated to the light splitting face, the light ray is divided into a refraction light and a reflection light. The reflection face reflects the refraction light, and the reflection face is substantially perpendicular to a path of the refraction light. Therefore, a light source with a high degree of polarization is realized by a design of the light splitting face and the reflection face.Type: ApplicationFiled: February 17, 2009Publication date: June 10, 2010Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Jung-Tsung Chou, Hui-Lung Kuo, Pin-Chen Chen, Yi-Ying Lai, Sheng-Wen Lin
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Publication number: 20100110336Abstract: Optical elements and backlight modules employing the same are provided. The optical element can be a brightness enhancement diffusion complex film, comprising a cholesteric liquid crystal film and a transparent optical film directly disposed on the cholesteric liquid crystal film. Particularly, the whole transparent optical film directly contacts to the cholesteric liquid crystal film, in the absence of an intermediate located between the transparent optical film and the cholesteric liquid crystal film.Type: ApplicationFiled: November 2, 2009Publication date: May 6, 2010Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Ying-Jui Lin, Hui-Lung Kuo, Pin-Chen Chen, Pao-Ju Hsieh
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Publication number: 20090284690Abstract: A high transmittance brightness enhanced optical element for backlight modules and liquid crystal display device is disclosed. The brightness enhanced polarizing optical element comprises a reflective polarizer film, a phase retardation film, and a polarization enhancement film. The reflective polarizer film provides a function of selectively reflecting right-handness circularly polarized light or left-handness circularly polarized light and will transmit the other one of them. The one was selectively reflected will be recombined with the light source or the backlight and re-direct toward the reflective polarizer. The portions of the reflective light will be recombined with the fresh light from the light source as above and the processes repeatedly. As a result, almost all of the light transmit the reflective polarizer and in the same circular polarization. The light is then transmitted the phase retardation film and converted to a polarized light with another optical axis.Type: ApplicationFiled: July 6, 2009Publication date: November 19, 2009Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Hui-Lung Kuo, Ping-Chen Chen, Yi-Ping Hsieh, Pao-Ju Hsieh, Yu-Hsun Wu
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Patent number: 7619712Abstract: A polarizer-alignment dual function film. The film comprising an optically anisotropic material layer having a plurality of strips integrally formed thereon. The strips provide an alignment function for aligning the liquid crystal molecules while the optically anisotropic material provides a polarization function such that the two functions can be integrated into a single-layered film.Type: GrantFiled: September 21, 2007Date of Patent: November 17, 2009Assignee: Industrial Technology Research InstituteInventors: Yi-Ying Lai, Hui-Lung Kuo, Sheng-Wen Lin, Pin-Chen Chen, Mei-Chih Peng, Yi-Ping Hsieh
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Publication number: 20090273742Abstract: A low color shift polarizer assembly is provided, comprising a cholesteric liquid crystal film with a plurality of very tiny grooves which are irregularly dispersed on a surface of the cholesteric liquid crystal film. The selective reflective wavelength range of the cholesteric liquid crystal film has a long wavelength boundary ?700 nm and a short wavelength boundary ?420 nm. A quarter wavelength retardation plate can be disposed on the cholesteric liquid crystal film to build up the final low color shift polarizer assembly. The polarizer assembly can be combined with a backlight unit and further with a liquid crystal display to provide low color shift at large viewing angles and high brightness.Type: ApplicationFiled: April 30, 2009Publication date: November 5, 2009Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Hui-Lung Kuo, Mei-Chih Peng, Pin-Chen Chen, Ying-Jui Lin
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Publication number: 20090246652Abstract: A color filter having a bi-layer metal grating is formed by nanoimprint lithography. Nanoimprint lithography, a low cost technology, includes two alternatives, i.e., hotembossing nanoimprint lithography and UV-curable nanoimprint lithography. Manufacture steps comprises providing a substrate with a polymer material layer disposed thereon. A plurality of lands and grooves are formed in the polymer material layer, and a first metal layer and a second metal layer are disposed on the surfaces of the lands and grooves, respectively. Finally, a color filter having a bi-layer metal grating is obtained.Type: ApplicationFiled: June 5, 2009Publication date: October 1, 2009Inventors: Pin-Chen CHEN, Hui-Lung KUO, Chih-Ho CHIU, Liang-Bin YU
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Publication number: 20090231706Abstract: A color filter having a bi-layer metal grating is formed by nanoimprint lithography. Nanoimprint lithography, a low cost technology, includes two alternatives, i.e., hot-embossing nanoimprint lithography and UV-curable nanoimprint lithography. Manufacture steps includes providing a substrate with a polymer material layer disposed thereon. A plurality of lands and grooves are formed in the polymer material layer, and a first metal layer and a second metal layer are disposed on the surfaces of the lands and grooves, respectively. Finally, a color filter having a bi-layer metal grating is obtained.Type: ApplicationFiled: May 28, 2009Publication date: September 17, 2009Inventors: Pin-Chen CHEN, Hui-Lung Kuo, Chih-Ho Chiu, Liang-Bin Yu
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Publication number: 20090168143Abstract: A bi-stable projection screen includes a light diffusion unit and a bi-stable display unit stacked together. The bi-stable display unit, when actuated, selectively operates in a first mode or a second mode. When operating in the first mode (e.g., a transmission mode or a reflection mode), the bi-stable display unit receives a projection light from a front projection or a rear projection, and emits the projection light after modulation. When operating in the second mode (a non-transmission mode or a non-reflection mode), the bi-stable display unit is a pattern to become a part of a scene. The light diffusion unit receives and diffuses the modulated projection light to be perceived by human eyes.Type: ApplicationFiled: March 27, 2008Publication date: July 2, 2009Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chun-Hsiang Wen, Wen-Hsien Wang, Yaw-Ting Wu, Hui-Lung Kuo
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Patent number: 7486371Abstract: A method for making an optical device comprises steps of: 1) Providing a substrate, a polymerizable liquid crystal material having a plurality of liquid crystal molecules, and a mold having rows of trenches; 2) Imprinting the polymerizable liquid crystal material on said substrate by the mold; 3) Proceeding a cross-linking process to cure the liquid crystal material so as to have long axes of the liquid crystal molecules be aligned along the rows of trenches. The optical device made from the present method conforms to an A-plate type retardation plate. Moreover, the optical device is capable of aligning liquid crystal molecules adjacent to it.Type: GrantFiled: February 17, 2005Date of Patent: February 3, 2009Assignee: Industrial Technology Research InstituteInventors: Chih-Ho Chiu, Hui-Lung Kuo, Mei-Chih Peng, Yi-Chun Liu, Pin-Chen Chen
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Publication number: 20080273151Abstract: A low color shift optical film is provided. The low color shift optical film comprises a cholesteric liquid crystal film and a retardation plate consisting of one or more O-plate type retardation plates on the cholesteric liquid crystal film. The retardation plate provides functions of polarization transformation and color shift compensation.Type: ApplicationFiled: May 1, 2008Publication date: November 6, 2008Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Hui-Lung Kuo, Mei-Chih Peng
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Publication number: 20080158499Abstract: A polarizer-alignment dual function film. The film comprising an optically anisotropic material layer having a plurality of strips integrally formed thereon. The strips provide an alignment function for aligning the liquid crystal molecules while the optically anisotropic material provides a polarization function such that the two functions can be integrated into a single-layered film.Type: ApplicationFiled: September 21, 2007Publication date: July 3, 2008Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Yi-Ying Lai, Hui-Lung Kuo, Sheng-Wen Lin, Pin-Chen Chen, Mei-Chih Peng, Yi-Ping Hsieh
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Publication number: 20080158877Abstract: A backlight module and a display using the same are disclosed. The backlight module includes an emitting device having a plurality of light emitting elements controlled by a color sequential method and a polarizing module on the emitting device. The display further has a display panel and a polarizer plate. The display panel is disposed between the polarizer plate and the backlight module.Type: ApplicationFiled: July 9, 2007Publication date: July 3, 2008Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Pao-Ju Hsieh, Hui-Lung Kuo, Mei-Chih Peng, Chun-Hsiang Wen
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Patent number: 7250719Abstract: An organic light emitting diode (OLED) with a brightness enhancer. The OLED comprises a substrate having a first surface and a second surface oppositely. An anode electrode is disposed on the first surface of the substrate. An organic light emitting layer is disposed on the anode electrode. A cathode electrode is disposed on the organic light emitting layer. A brightness enhancer is disposed on the second surface of the substrate.Type: GrantFiled: August 16, 2005Date of Patent: July 31, 2007Assignee: Industrial Technology Research InstituteInventors: Liang-Bin Yu, Tien-Shou Shieh, Hui-Lung Kuo, Mei-Rurng Tseng, Pin-Sien Yu
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Patent number: 7158302Abstract: A wire grid polarizer with double metal layers for the visible spectrum. Parallel dielectric layers having a period (p) of 10˜250 nm and a trench between adjacent dielectric layers overlie a transparent substrate. A first metal layer having a first thickness (d1) of 30˜150 nm is disposed in the trench. A second metal layer having a second thickness (d2) of 30˜150 nm and a width (w) overlies on the top surface of each dielectric layer. The first and second metal layers are separated by a vertical distance (l) of 10˜100 nm. The first thickness (d1) is the same as the second thickness (d2). A ratio of the width (w) to the period (p) is 25˜75%.Type: GrantFiled: April 8, 2004Date of Patent: January 2, 2007Assignee: Industry Technology Research InstituteInventors: Chih-Ho Chiu, Hui-Lung Kuo, Yi-Chun Liu, Ping-Chen Chen