Nonchiral Additive In The Liquid Crystal Material Patents (Class 349/163)
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Patent number: 11349076Abstract: A display panel, an evaporation method of a luminous material, and an equipment are provided. The method is performed by providing an electric field covering an array substrate, and generating luminous material charged particles. After the luminous material charged particles passing through the mask, they will change a direction of motion under an action of the electric field, and move perpendicularly to a pixel area of the array substrate along a direction of the electric field, and then uniformly deposit on the pixel area of the array substrate, which ensures that a uniformity of film formation of the luminous material.Type: GrantFiled: March 5, 2019Date of Patent: May 31, 2022Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd.Inventor: Wei Cheng
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Patent number: 9477086Abstract: A display device includes a first polarizer for transmitting first light that is parallel to a first axis and pertains to a two-dimensional image. The display device further includes a first electrode layer, a second electrode layer, and a liquid crystal layer disposed between the first electrode and the second electrode. The liquid crystal layer includes a chiral dopant and a liquid crystal material and is configured to form a lens associated with a predetermined phase distribution. The lens is configured for refracting the first light to transmit second light. The display device further includes a second polarizer for polarizing the second light to transmit third light that is parallel to a second axis. The second axis is oriented at an angle with respect to the first axis in a plan view of the display device. The angle has a predetermined angle size greater than zero degree.Type: GrantFiled: October 17, 2012Date of Patent: October 25, 2016Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Suk Choi, Sung Hwan Hong, Su Jin Kim, Heung Shik Park, Ji Hong Bae, Hyeok Jin Lee
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Patent number: 9322956Abstract: The invention relates to photo-alignment layers for planar alignment of liquid crystals. Photo-alignment layers according to the invention exhibit a characteristic wavelength dependency of the dichroism in the uv wavelength range. The invention further relates to methods for providing such photo-alignment layers as well as liquid crystal devices containing them.Type: GrantFiled: September 28, 2012Date of Patent: April 26, 2016Assignee: ROLIC AGInventors: Mohammed Ibn-Elhaj, Eva Veenstra, Manuel Koechlin
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Publication number: 20150085241Abstract: The present invention provides a liquid crystal horizontal orientation agent, a horizontal orientation type liquid crystal composition, a horizontal orientation type LCD device and a method of fabricating the horizontal orientation type LCD device. In one embodiment, the liquid crystal molecule is horizontally oriented by the liquid crystal horizontal orientation agent without the rubbed orientation layer.Type: ApplicationFiled: September 22, 2014Publication date: March 26, 2015Applicants: YAMAGATA UNIVERSITY, LG DISPLAY CO., LTD.Inventors: Momoi YUICHI, Mu-Sun KWAK, Koda TOMONORI, Yonetake KOICHIRO, Haba OSAMU
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Patent number: 8866997Abstract: Linear photo-oriented polymer (LPP) layers are situated to align liquid crystals in a liquid crystal polymer (LCP) layer situated at or on the LPP layers. The LCP layer can include a guest such as a fluorophore that aligns with the liquid crystal so as to emit polarized fluorescence in response to an excitation beam. Layer LPP/LCP structures can be provided as light emitters, patterned polarizers, patterned retarders and other devices based on selection of one or more guest materials included in the LCP and alignable with the liquid crystal.Type: GrantFiled: November 2, 2011Date of Patent: October 21, 2014Assignee: Arizona Board of Regents on behalf of the University of ArizonaInventors: Stanley Pau, Arshad S. Sayyad, Graham B. Myhre
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Patent number: 8724073Abstract: A method for manufacturing a liquid crystal display (LCD) device includes preparing first and second substrates, at least one of the first and second substrates being a transparent substrate; forming a plurality of the column spacers on the first substrate for maintaining a cell gap between the first and second substrates and a sidewall on the first substrate for sealing the periphery of the substrates; applying an adhesive solution including an adhesive diluted with an organic solvent onto the first substrate having the column spacers and the sidewall thereon; positioning the second substrate on the first substrate so that the first and second substrates face each other; adhering the column spacers to the second substrate by drying the organic solvent from the adhesive solution; and providing a liquid crystal material between the first and second substrates.Type: GrantFiled: July 15, 2013Date of Patent: May 13, 2014Assignee: LG Display Co., Ltd.Inventors: Joung Won Woo, Yuichi Momoi, Dong Cheon Shin
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Patent number: 8711322Abstract: Electrowetting display devices are presented. The electrowetting display includes a first substrate and an opposing second substrate with a transparent polar fluid layer and an opaque non-polar fluid layer insoluble with each other and interposed between the first and second substrates. A first transparent electrode is disposed on the first substrate. A second transparent electrode is disposed on the second substrate. A dielectric layer is disposed on the second transparent electrode. A reflective plate structure is interposed between the second transparent electrode and the second substrate, thereby defining a reflective region and a transmission region. A backlight plate is disposed on the back of the second substrate. During operation, the opaque non-polar fluid converges, therefore, exposing equal areas of reflective region and transmission region.Type: GrantFiled: August 18, 2008Date of Patent: April 29, 2014Assignee: Industrial Technology Research InstituteInventors: Wei-Yuan Cheng, Chih-Chun Hsiao, Jen-Chieh Yang, Kuo-Lung Lo
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Patent number: 8692969Abstract: The color filter may include a pixel unit having a plurality of sub-pixels of different colors, wherein the plurality of sub-pixels respectively include flat plate metal layers and a plurality of color PDLC layers on the flat plate metal layers, and the plurality of color PDLC layers each include a polymer, a plurality of liquid crystal drops dispersed in the polymer, and a plurality of color display materials mixed in the liquid crystal drops.Type: GrantFiled: October 13, 2010Date of Patent: April 8, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-eun Jang, Gae-hwang Lee, Kyu-young Hwang, Jae-eun Jung
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Patent number: 8675167Abstract: A polymer dispersed display apparatus includes a polymer layer, and a plurality of liquid crystal drops dispersed in the polymer layer. Quantum dots emitting a plurality of colors of light are mixed in the liquid crystal drops. Therefore, the polymer dispersed display apparatus displays colors without the need for a color filter. Thus, the polymer dispersed display apparatus need not include a polarization plate and a color filter, so that a light usage efficiency of the polymer dispersed display apparatus increases.Type: GrantFiled: December 17, 2009Date of Patent: March 18, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-eun Jang, Seung-nam Cha, Jae-eun Jung, Yong-wan Jin
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Publication number: 20130229607Abstract: A liquid crystal display includes a first substrate and a second substrate facing each other, a plurality of first electrodes on the first substrate, a first vertical alignment layer on the first electrodes, a second electrode on the second substrate, a second vertical alignment layer on the second electrode, and a liquid crystal layer between the first substrate and the second substrate, wherein the liquid crystal layer includes liquid crystal molecules having negative dielectric anisotropy, a chiral dopant, and an alignment aiding agent.Type: ApplicationFiled: June 22, 2012Publication date: September 5, 2013Inventors: Dong Gi SEONG, Hee Hwan LEE, Min-Jae KIM, Min-Hee KIM, Keun Chan OH
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Patent number: 8514355Abstract: A method for manufacturing a liquid crystal display (LCD) device includes preparing first and second substrates, at least one of the first and second substrates being a transparent substrate; forming a plurality of the column spacers on the first substrate for maintaining a cell gap between the first and second substrates and a sidewall on the first substrate for sealing the periphery of the substrates; applying an adhesive solution including an adhesive diluted with an organic solvent onto the first substrate having the column spacers and the sidewall thereon; positioning the second substrate on the first substrate so that the first and second substrates face each other; adhering the column spacers to the second substrate by drying the organic solvent from the adhesive solution; and providing a liquid crystal material between the first and second substrates.Type: GrantFiled: June 2, 2006Date of Patent: August 20, 2013Assignee: LG Display Co., Ltd.Inventors: Joung Won Woo, Yuichi Momoi, Dong Cheon Shin
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Patent number: 8462310Abstract: A nematic bistable liquid crystal (LC) display element includes a substrate having an inner surface alignment layer and a pair of in-plane electrodes in proximity to the substrates. The display element has charged electrophoretic nanoparticles in the LC medium configured to setup a matrix with the LC when an electric field is applied to the electrodes.Type: GrantFiled: October 14, 2008Date of Patent: June 11, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: Laura Lynn Kramer, David Sikharulidze
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Patent number: 8323755Abstract: Nematic liquid crystal cells with positive dielectric anisotropy that include colloidal suspensions having nanoclusters (e.g., CdTe nanoclusters, CdSe nanoclusters) that include a pure monolayer of ligands are provided as well as methods of inducing Freedericksz transitions in the nematic liquid crystal cells and methods of controlling the alignment of a liquid crystal.Type: GrantFiled: February 22, 2010Date of Patent: December 4, 2012Assignee: University of ManitobaInventors: Torsten Hegmann, Brandy Melissa Kinkead
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Patent number: 8294838Abstract: Nematic liquid crystal cells with positive dielectric anisotropy that include colloidal suspensions having nanoclusters are provided as well as methods of inducing Freedericksz transitions therein and methods of controlling the alignment of a liquid crystal.Type: GrantFiled: May 2, 2008Date of Patent: October 23, 2012Assignee: University of ManitobaInventors: Torsten Hegmann, Hao Qi
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Patent number: 8294849Abstract: A liquid crystal display device comprises: a liquid crystal display element comprising a pair of glass substrates facing to each other, transparent electrode patterns, each transparent electrode pattern being formed on a facing surface of each one of said pair of glass substrates film structures, each film structure including an oriented film and being formed on each one of said pair of glass substrates with covering said transparent electrode, and a liquid crystal layer held between the pair of glass substrates; and a light source that can radiate near infrared rays to said liquid crystal display element, and wherein at least one of said liquid crystal layer and said film structures include near infrared ray absorption material. A response time of the liquid crystal display device can be improved at a low temperature.Type: GrantFiled: June 2, 2008Date of Patent: October 23, 2012Assignee: Stanley Electric Co., Ltd.Inventor: Yasuo Toko
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Patent number: 8174630Abstract: A reflective liquid crystal display panel capable of performing data programming and/or data erasing via a polarized light is provided. The reflective liquid crystal display panel includes a first substrate, a second substrate, a liquid crystal layer, a transflective film, a retarder and a polarizer. The second substrate is disposed over the first substrate. The liquid crystal layer is located between the first substrate and the second substrate and an optical aligned material is doped in the liquid crystal layer. The transflective film is disposed below the first substrate, and the transflective film allows the polarized light to pass through, so that the orientation of the optical aligned material doped liquid crystal layer can be controlled by the polarized light. The transflective film reflects external light source. The retarder is disposed between the transflective film and the first substrate. The polarizer is disposed on the second substrate.Type: GrantFiled: July 26, 2006Date of Patent: May 8, 2012Assignee: Industrial Technology Research InstituteInventors: Wei-Ting Hsu, Tsung-Hsien Lin, Hsing-Lung Wang, Chi-Chang Liao
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Publication number: 20120099065Abstract: A liquid crystal display (LCD) includes: a first substrate; a second substrate facing the first substrate; a first electrode and a second electrode formed on the first substrate; and a liquid crystal layer interposed between the first substrate and the second substrate, wherein a first alignment polymer configured to provide an alignment force to the liquid crystal is at a portion of the liquid crystal layer near the first substrate.Type: ApplicationFiled: March 23, 2011Publication date: April 26, 2012Inventor: Yong-Kyu Jang
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Patent number: 8081272Abstract: In a preparation method, a chiral or cholesteric liquid crystal, a photoreactive monomer, and a photoinitiator are disposed in a liquid crystal cell. A principal surface of the liquid crystal cell is illuminated with ultraviolet light selected to have a non-uniform ultraviolet light intensity profile in the liquid crystal cell. The illuminating cooperates with the photoinitiator to polymerize at least a portion of the photoreactive monomer near the principal surface to generate a polymer network having a density corresponding to the non-uniform ultraviolet light intensity profile. The polymer network biases the liquid crystal toward a selected helical alignment direction. In some embodiments, the illuminating includes illuminating with first and second ultraviolet light intensity profiles to produce surface and volume polymer network components.Type: GrantFiled: February 25, 2009Date of Patent: December 20, 2011Assignees: Kent State UniversityInventors: Lachezar Komitov, Liang-Chy Chien, Sang Hwa Kim
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Patent number: 7964252Abstract: A liquid crystal device includes a pair of substrates and a liquid crystal layer which is interposed between the pair of substrates and which contains at least one kind of additive selected from a ultraviolet ray absorbent and a radical scavenger, in which a gap between the pair of substrates is set according to amount of the additive.Type: GrantFiled: December 6, 2007Date of Patent: June 21, 2011Assignee: Seiko Epson CorporationInventor: Kosuke Chidate
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Patent number: 7903228Abstract: A liquid crystal device comprises ferroelectric particles suspended in a liquid crystal material. A method for fabricating a light-modulating device is also disclosed. The method comprises the steps of providing a pair of substrates with a cell gap therebetween, wherein electrodes are disposed on the facing surfaces of the substrates, and permanently disposing a suspension of ferroelectric particles in a liquid crystal material into said cell gap. A method of generating an image comprises providing a pair of substrates with a cell gap therebetween, providing transparent electrodes on each of said substrates adjacent to the cell gap, permanently disposing a suspension of ferroelectric particles in a liquid crystal material within the cell gap, and applying an electric field across the electrodes.Type: GrantFiled: January 10, 2003Date of Patent: March 8, 2011Assignee: Kent State UniversityInventors: Yurii Reznikov, Anatoliy Glushchenko, Victor Reshetnyak, John West
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Patent number: 7859637Abstract: A system and method of use of a storage capacitor to improve the appearance and addressing characteristics of an electronically driven display. The capacitor is formed by the overlap of portions of electrodes used to address different pixels, or by the overlap of an addressing line and a conductor. An insulator layer situated between the capacitor electrodes can be the same insulator layer present in an FET transistor used to address the pixel. Methods of use of capacitors to achieve improved display addressing are disclosed.Type: GrantFiled: December 19, 2006Date of Patent: December 28, 2010Assignee: E Ink CorporationInventors: Karl R. Amundson, Paul S. Drzaic, Peter T. Kazlas
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Publication number: 20100245695Abstract: A liquid crystal display element includes a first substrate having a first electrode on one surface thereof, a transparent second substrate having a transparent second electrode on one surface thereof, a first liquid crystal layer containing a liquid crystal composition, a color filter, and a second liquid crystal layer containing a liquid crystal composition, and at least one of the first and second liquid crystal layers includes an additive having dielectric properties, and the dielectric constant of the first liquid crystal layer is different from that of the second liquid crystal layer.Type: ApplicationFiled: September 4, 2009Publication date: September 30, 2010Applicant: FUJI XEROX CO., LTD.Inventors: Takeo KAKINUMA, Tadayoshi OZAKI, Chikara MANABE, Naoki HIJI
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Publication number: 20100195008Abstract: Nematic liquid crystal cells with positive dielectric anisotropy that include colloidal suspensions having nanoclusters are provided as well as methods of inducing Freedericksz transitions therein and methods of controlling the alignment of a liquid crystal.Type: ApplicationFiled: May 2, 2008Publication date: August 5, 2010Applicant: UNIVERSITY OF MANITOBAInventors: Torsten Hegmann, Hao Qi
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Publication number: 20100195036Abstract: A liquid crystal display (LCD) comprises a first substrate comprising a pixel electrode comprising one or more first domain-forming features and further comprising a first vertical alignment film disposed on the pixel electrode; a second substrate facing the first substrate and comprising a common electrode which comprises one or more second domain-forming features and further comprises a second vertical alignment film disposed on the common electrode; and a liquid crystal compound interposed between the first and second substrates, wherein the liquid crystal compound comprises liquid crystal molecules, ultraviolet (UV) hardening monomers and UV hardening initiators, and the liquid crystal molecules are pre-tilted to form an angle greater than 88 degrees but less than 90 degrees with respect to the first substrate when no driving power is applied to the pixel and common electrodes. Fast response time is provided in some embodiments.Type: ApplicationFiled: April 9, 2010Publication date: August 5, 2010Inventors: Ji-won SOHN, Jong-ho Son, Seung-beom Park, Seon-ah Cho, Jun-hee Na
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Publication number: 20100141881Abstract: A security document or device is provided which incorporates one or more optical components. Each component includes at least one orientating layer, preferably a photo-orientated polymer network (PPN), and at least one liquid crystal polymer (LCP) layer, and either or both of the orientating layers and LCP layers include a cross-linker to improve the robustness of the document or device without detracting from the desired optical properties. Such a document or device can be authenticated using an external polariser, or using a polariser integral to the document or device itself.Type: ApplicationFiled: May 25, 2007Publication date: June 10, 2010Inventors: Odisea Batistatos, Gary Fairless Power
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Publication number: 20100091208Abstract: A nematic bistable liquid crystal (LC) display element includes a substrate having an inner surface alignment layer and a pair of in-plane electrodes in proximity to the substrates. The display element has charged electrophoretic nanoparticles in the LC medium configured to setup a matrix with the LC when an electric field is applied to the electrodes.Type: ApplicationFiled: October 14, 2008Publication date: April 15, 2010Inventors: Laura Lynn Kramer, David Sikharulidze
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Publication number: 20090213317Abstract: A method for manufacturing a liquid crystal display panel is provided. The method includes: providing a first substrate and a second substrate; providing a plurality of liquid crystal drops on the first substrate, wherein two adjacent liquid crystal drops in X direction is kept by a distance d1 mm, and two adjacent liquid crystal drops in Y direction is kept by a distance d2 mm, each liquid crystal drop is G mg, d1?16.7, d2?15.4, and G?1; and connecting the first substrate and the second substrate so that the liquid crystal drops are sealed between the first substrate and the second substrate.Type: ApplicationFiled: April 2, 2008Publication date: August 27, 2009Applicant: AU OPTRONICS CORP.Inventors: Jia-Hau Jian, Chih-Ho Chiu, Cheng-Jung Chiang, Chung-Ching Hsieh, Te-Sheng Chen, Norio Sugiura
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Patent number: 7499125Abstract: In a preparation method, a chiral or cholesteric liquid crystal, a photoreactive monomer, and a photoinitiator are disposed in a liquid crystal cell. A principal surface of the liquid crystal cell is illuminated with ultraviolet light selected to have a non-uniform ultraviolet light intensity profile in the liquid crystal cell. The illuminating cooperates with the photoinitiator to polymerize at least a portion of the photoreactive monomer near the principal surface to generate a polymer network having a density corresponding to the non-uniform ultraviolet light intensity profile. The polymer network biases the liquid crystal toward a selected helical alignment direction. In some embodiments, the illuminating includes illuminating with first and second ultraviolet light intensity profiles to produce surface and volume polymer network components.Type: GrantFiled: March 1, 2006Date of Patent: March 3, 2009Assignees: Kent State University, Lachezar KomitovInventors: Lachezar Komitov, Liang-Chy Chien, Sang Hwa Kim
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Publication number: 20090015902Abstract: The thermally switched reflective optical shutter is a self-regulating “switchable mirror” device that reflects up to 100% of incident radiant energy above a threshold temperature, and reflects up to 50% of incident radiant energy below a threshold temperature. Control over the flow of radiant energy occurs independently of the thermal conductivity or insulating value of the device, and may or may not preserve the image and color properties of incoming visible light. The device can be used as a construction material to efficiently regulate the internal temperature and illumination of buildings, vehicles, and other structures without the need for an external power supply or operator signals. The device has unique aesthetic optical properties that are not found in traditional windows, skylights, stained glass, light fixtures, glass blocks, bricks, or walls.Type: ApplicationFiled: July 11, 2008Publication date: January 15, 2009Inventors: Richard M. Powers, Wil McCarthy
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Publication number: 20080316418Abstract: The invention relates to a liquid crystal (LC) material that aligns homeotropically on substrates with high or low surface energy.Type: ApplicationFiled: May 16, 2006Publication date: December 25, 2008Inventors: Richard Harding, Matthew Francis, Owain Llyr Parri, Donald Gordon Graham, Shirley Ann Marden
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Patent number: 7420647Abstract: The present invention relates to a method for producing a liquid crystal display device, in which a pretilt angle and a tilt direction upon application of a voltage of liquid crystal molecules are controlled by using a polymer and is to provide a method for producing a liquid crystal display device that provides good display characteristics.Type: GrantFiled: March 29, 2004Date of Patent: September 2, 2008Assignee: Sharp Kabushiki KaishaInventor: Yuji Nakahata
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Publication number: 20040156008Abstract: A liquid crystal device comprises ferroelectric particles suspended in a liquid crystal material. A method for fabricating a light-modulating device is also disclosed. The method comprises the steps of providing a pair of substrates with a cell gap therebetween, wherein electrodes are disposed on the facing surfaces of the substrates, and permanently disposing a suspension of ferroelectric particles in a liquid crystal material into said cell gap. A method of generating an image comprises providing a pair of substrates with a cell gap therebetween, providing transparent electrodes on each of said substrates adjacent to the cell gap, permanently disposing a suspension of ferroelectric particles in a liquid crystal material within the cell gap, and applying an electric field across the electrodes.Type: ApplicationFiled: March 25, 2004Publication date: August 12, 2004Inventors: Yurii Reznikov, Anatoliy Glushchenko, Victor Reshetnyak, John West
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Patent number: 5784141Abstract: A phase spatial light modulator composed of a liquid crystal cell having molecular orientation recorded during the fabrication process as a direct result of a photochemical reaction exerted upon the liquid crystal material, a mechanically-induced change of a liquid crystal alignment layer, or by varying a plurality of polymer materials that compose the liquid crystal alignment layer, thereby affecting the liquid crystal material contained within the cell. The modulator, or scanner, thereby capable of altering the phase, thus steering light passing therethrough. During operation, the liquid crystal molecules deflect the light beam passing therethrough based on their orientation as recorded during fabrication when the applied voltage is "OFF" or in an altered state when the applied voltage is "ON".Type: GrantFiled: October 4, 1996Date of Patent: July 21, 1998Assignee: Motorola, Inc.Inventors: Diana Chen, Phil Wright, Cheng-Ping Wei