With Particular Non-zero And Non-90 Angle Between Opposite Polarization Axes Patents (Class 349/103)
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Publication number: 20090086132Abstract: A liquid crystal display unit has: a pair of opposing substrates; an electrode pattern formed on each of the substrates on an opposing surface side; a vertical alignment film formed on each of the substrates and covering the electrode pattern; a liquid crystal layer squeezed between the substrates; and a pair of polarizer plates formed on the substrates on an opposite side to the side of said liquid crystal layer, wherein an edge of the electrode pattern includes a zigzag pattern parallel to one of axis directions of the polarizer plates and a direction perpendicular the axis direction. Optical through can be reduced along an edge portion of a pixel of a vertical alignment LCD.Type: ApplicationFiled: September 25, 2008Publication date: April 2, 2009Applicant: Stanley Electric Co., Ltd.Inventors: Masatoshi Horii, Takashi Sugiyama, Yoshihisa Iwamoto, Keiichi Hirata
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Patent number: 7477330Abstract: A protective automatic darkening filter construction 10 includes two low twist liquid crystal cells 26, 30 interspersed between a series of offset polarizers 24, 28, 32. The resulting construction provides improved homogeneity in the dark state as viewed by the user over a large viewing angle. By reducing variations in shade, visibility through the filter may be improved.Type: GrantFiled: March 9, 2005Date of Patent: January 13, 2009Assignee: 3M Innovative Properties CompanyInventors: Kristina M. Magnusson, Kenneth Jarefors, Per-Olav Dahlin
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Patent number: 7443440Abstract: A color separator includes a polarization converting section for converting an incoming light ray into a linearly polarized light ray such that the polarization direction of the linearly polarized light ray is selectable from a number of predetermined directions, and a diffracting section, which is arranged so as to receive the linearly polarized light ray that has gone out of the polarization converting section and which produces a zero-order light ray in which one of multiple different wavelength components is selectively weakened according to the polarization direction at least.Type: GrantFiled: March 29, 2005Date of Patent: October 28, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Seiji Nishiwaki, Michiyoshi Nagashima
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Patent number: 7365721Abstract: The present invention provides an inexpensive projection display that allows a pixel grid as ineffective portions of respective pixels of a light valve to be made inconspicuous. The projection display includes a birefringent element (43) for spatially separating light from a transmission liquid crystal light valve (39). The birefringent element (43) includes a first birefringent plate (40) that the light from the liquid crystal light valve (39) enters, a second birefringent plate (41) that light from the first birefringent plate (40) enters, and a third birefringent plate (42) that light from the second birefringent plate (41) enters. A polarization direction of the light entering the first birefringent plate (40) forms an angle of n×45° (n is an integer other than 0) with an optic axis of the first birefringent plate (40) projected on an incident surface of the first birefringent plate (40).Type: GrantFiled: April 16, 2003Date of Patent: April 29, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takaaki Tanaka, Atsushi Hatakeyama, Shigekazu Yamagishi
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Publication number: 20080062358Abstract: A liquid crystal display (LCD) and a liquid crystal panel thereof are provided. The LCD includes a backlight module and the liquid crystal panel disposed thereon. The liquid crystal panel has a first substrate, a second substrate, and a positive liquid crystal layer. The first substrate has a plurality of pixel electrodes, and each pixel electrode has a plurality of first strip-shape portions. The second substrate has a common electrode, and the common electrode has a plurality of second strip-shape portions. The positive liquid crystal layer is interposed between the pixel electrodes of the first substrate and the common electrode of the second substrate and is vertically aligned. The corresponding areas of the first and the second strip-shape portions are staggered.Type: ApplicationFiled: August 7, 2007Publication date: March 13, 2008Applicant: WINTEK CORPORATIONInventors: Chian-Chang Lee, Chin-Chang Liu, Chien-Chung Kuo
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Patent number: 7319500Abstract: There is provided a liquid crystal display which exhibits preferable viewing angle characteristics even in a diagonal viewing angle. Optical retardation films of a first type that satisfy nx>ny, nz and optical retardation films of a second type that satisfy nx?ny>nz are used, and a setting is made to satisfy Rp?t=2×(?0.08×RLC+58 nm+?) (?=±30 nm) and Rt?t=(1.05±0.05)×RLC?47 nm+?(?100 nm???47 nm) where ?nd represents a retardation RLC in the liquid crystal display; Rp?t represents the sum of retardations Rp in in-plane directions of a plurality of optical retardation films; and Rt?t represents the sum of retardations Rt in the direction of the thickness of the plurality of optical retardation films.Type: GrantFiled: April 3, 2001Date of Patent: January 15, 2008Assignee: Sharp Kabushiki KaishaInventors: Hidefumi Yoshida, Takashi Sasabayashi, Yasutoshi Tasaka, Yohei Nakanishi, Kenji Okamoto, Seiji Tanuma, Kazutaka Hanaoka, Takatoshi Mayama, Yuichi Inoue
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Patent number: 7289173Abstract: A polarizing element 20 has a first undulating structure in which a plurality of linear first recesses 22 are formed parallel to one another in one surface of a transparent substrate 21, and a dielectric layer 30 made from silicon dioxide is formed on the surface of the first undulating structure to produce a second undulating structure. The second undulating structure has formed therein second recesses 32 having a width W and a depth H, with second projections 33 having a width d intervening between adjacent second recesses 32. A thin-film-shaped conductive body 13 of width W and depth H is embedded in each of the second recesses 32.Type: GrantFiled: July 27, 2001Date of Patent: October 30, 2007Assignee: Nippon Sheet Glass Co., Ltd.Inventors: Mitsuhiro Kawazu, Shinji Kawamoto, Hiroaki Yamamoto, Hideshi Nagata, Vladimir Victrovich Serikov, Hiroyuki Inomata
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Patent number: 7190416Abstract: A liquid crystal display with a touch panel is described. The liquid crystal display includes a front panel including an internal front polarizer, a liquid crystal layer, and a rear panel including a rear polarizer. A touch transparent panel is secured to the front surface of the liquid crystal display.Type: GrantFiled: March 27, 2003Date of Patent: March 13, 2007Assignee: Nitto Denko CorporationInventors: Michael V. Paukshto, Louis D. Silverstein
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Patent number: 7023508Abstract: A liquid crystal display device includes a substrate having a display region on which thin film transistors are formed and a pad region located in a periphery of the display region. The display region has a transparent electrode, the pad region has a pad electrode, and the transparent electrode and the pad electrode formed from a same layer. A barrier metal layer pattern is formed on the transparent electrode, and a reflective electrode is formed on the barrier metal layer. The reflective electrode has a transmission window for exposing a portion of the transparent electrode, wherein the barrier metal layer is comprised of material having an etching rate that is similar to an etching rate of the reflective electrode.Type: GrantFiled: August 14, 2002Date of Patent: April 4, 2006Assignee: Samsung Electronics, Co., Ltd.Inventor: Chun-Gi You
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Patent number: 6989877Abstract: A liquid crystal display device and an electronic apparatus have superior visibility. A transflective reflective liquid crystal device comprises liquid crystals, an upper substrate, an lower substrate, an upper polarizing layer, a reflective polarizing layer, a lower polarizing layer, and a lighting device. A liquid crystal panel comprises the upper substrate, the upper polarizing layer, the liquid crystal, the lower reflective polarizing layer, the lower polarizing layer, and the lower substrate.Type: GrantFiled: June 3, 2002Date of Patent: January 24, 2006Assignee: Seiko Epson CorporationInventor: Chiyoaki Iijima
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Patent number: 6975372Abstract: Methods and systems relating to a LCD are disclosed. In one exemplary embodiment, the LCD has an active state and an inactive state. The inactive state is configured to produce a desired residual image. The active state is configured to produce a desired non-residual image.Type: GrantFiled: September 23, 2002Date of Patent: December 13, 2005Assignee: Hewlett-Packard Development Company, L.P.Inventor: Michael D Long
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Patent number: 6970214Abstract: When an optical element is produced using a liquid crystal film having no supporting substrate film for the purpose of decreasing the weight, the liquid crystal film layer may often pose problems of fine wrinkly deformation of and cracking in a caused by strain occurring during a manufacturing/processing step. The present invention intends to provide an elliptical polarizer having a thinned optical anisotropic element which is free from such deformation and cracking. The elliptical polarizer of the present invention comprises at least a polarizer and an optical anisotropic element wherein said optical anisotropic element comprises a liquid crystalline substance layer with a fixed liquid crystal orientation, a tacky adhesive/adhesive layer, and a stress blocking layer.Type: GrantFiled: March 2, 2004Date of Patent: November 29, 2005Assignee: Nippon Oil CorporationInventors: Haruyoshi Sato, Shinichiro Suzuki, Kenji Hosaki
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Patent number: 6961104Abstract: A transflective liquid crystal display device includes: first and second substrates facing and spaced apart from each other, the first and second substrates having reflective and transmissive portions; a first retardation film on an outer surface of the first substrate, the first retardation film having a first optical axis; a first polarizing plate on the first retardation film, the first polarizing plate having a first transmissive axis; a common electrode on an inner surface of the first substrate; a pixel electrode on an inner surface of the second substrate; a second retardation film on an outer surface of the second substrate, the second retardation film having a second optical axis; a second polarizing plate on the second retardation film, the second polarizing plate having a second transmissive axis; and a liquid crystal layer between the common electrode and the pixel electrode, the liquid crystal layer having a director, wherein the first optical axis has a first angle of ? with respect to the firstType: GrantFiled: April 24, 2003Date of Patent: November 1, 2005Assignee: LG.Philips LCD Co., Ltd.Inventor: Heum-II Baek
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Patent number: 6873099Abstract: An electroluminescent (EL) display apparatus is constructed in such a way that a plurality of EL elements are disposed on one surface of an optically transparent substrate in a matrix so as to be isolated from each other and be powered individually, and at least one of a pair of electrodes is made of an optically transparent electrode, so that, when the EL elements are powered, light is emitted from the light emitting layers, wherein an optical device is provided on the other surface side of the substrate so that at least a portion of an incident light injected into the substrate and forming an angle to cause total reflection at the exit face is scattered and/or diffracted externally, and another portion of the incident light is weakly scattered and/or transmitted externally.Type: GrantFiled: May 28, 2002Date of Patent: March 29, 2005Assignee: Seiko Epson CorporationInventor: Tsuyoshi Maeda
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Patent number: 6853411Abstract: A high aperture ratio emissive tiled display comprised of a plurality of tiles including a substrate with discrete layers of integrated drive circuits, thin film transistors, circuit conductor layer and light-emitting pixel array wherein all the electronic circuitry is contained under the pixel array. Vertical interconnects are made between the drive circuits, circuits and pixel electrodes, as necessary, and can include vertical interconnections through the substrate. Large flat panel displays including at least two of said tiles are aligned to maintain pixel pitch from one tile to another to produce a seamless image.Type: GrantFiled: February 20, 2001Date of Patent: February 8, 2005Assignee: Eastman Kodak CompanyInventors: Henry R. Freidhoff, Giana M. Phelan
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Patent number: 6839103Abstract: An elliptically polarizing plate, comprising a polarizer, a first optical anisotropic layer having positive refractive index anisotropy and an optical axis of the anisotropy that is tilted, and a second optical anisotropic layer having negative refractive index anisotropy and an optical axis that is tilted, have accurate retardation compensation of a liquid crystal cell, and the liquid crystal display maintains a display contrast having a sufficient visibility when the viewing angle is changed and which does not generate colorization.Type: GrantFiled: February 28, 2002Date of Patent: January 4, 2005Assignee: Kent State UniversityInventors: Jack Kelly, Tatiana Sergan, Marina Lavrentovich, Yuuichi Nishikouji, Tadayuki Kameyama
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Patent number: 6603521Abstract: A normally white reflection type liquid crystal display includes a polarization plate; a quarter wavelength plate; a transparent substrate; a transparent electrode; and a twisted nematic liquid crystal layer. The polarization plate, the quarter wavelength plate, the transparent substrate, the transparent electrode, and the twisted nematic liquid crystal layer are layered in sequence from a light inputting side, and the angle between the optical axis of the quarter wavelength plate and the transmission axis of the polarization plate is below 65 degrees and above 45 degrees, or below 45 degrees and above 25 degrees.Type: GrantFiled: June 20, 2002Date of Patent: August 5, 2003Assignee: NEC CorporationInventors: Teruaki Suzuki, Koichi Yanai
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Patent number: 6480248Abstract: Disclosed are an LCD and a method of illuminating a liquid crystal layer. A protecting sheet is disposed on a reflection polarization film for enhancing the brightness. The protecting sheet is made of polyethylene terephthalate based material manufactured by an extension process to enhance the brightness, to improve visual angle and to prevent a Moire phenomenon. The LCD and the illumination method of the present invention enable high brightness displaying, color modulation depending on the visual angle and a relatively low manufacturing cost.Type: GrantFiled: December 14, 2001Date of Patent: November 12, 2002Assignee: Samsung Electronics Co., Ltd.Inventors: Jeong-Hwan Lee, Kyu-Seok Kim
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Patent number: 6034758Abstract: A passive dot matrix liquid crystal display having improved visibility comprises plural column electrodes on a first plate interconnected by a plurality of electrode bridges to form groups of interconnected column electrodes, wherein the number of electrodes in each electrode group is equal to or less than the inverse of the multiplex ratio of the display. The display also comprises plural row electrodes interconnected by a plurality of electrode bridges to form groups of interconnected row electrodes, wherein the number of groups of interconnected row electrodes is equal to the multiplex ratio of the display. By grouping the row and column electrodes into such groups, the multiplex ratio of the display can be reduced to levels substantially below the multiplex ratios of conventional passive dot matrix Liquid Crystal Displays, thereby significantly enhancing visibility of the display.Type: GrantFiled: June 20, 1997Date of Patent: March 7, 2000Inventor: Michael G. Petera
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Patent number: 5796378Abstract: A color liquid crystal display apparatus comprises an ECB (Electrically Controlled Birifringence) type liquid crystal display device, which has a plurality of dots arranged in a matrix form and displays a plurality of colors in accordance with applied voltages dot by dot, and a driving circuit. The driving circuit includes an image memory, a display controller, a conversion table, a D/A converter and drivers. The display controller reads image data stored in the image memory. This image data defines a display color of a pixel consisting of a plurality of dots and a gradation. The conversion table converts image data to voltage data defining voltages to be applied to a plurality of dots of the liquid crystal display device in order to display the color and gradation defined by the image data. The D/A converter converts this voltage data to an analog voltage and the drivers apply this analog voltage to each dot of the liquid crystal display device.Type: GrantFiled: March 21, 1995Date of Patent: August 18, 1998Assignee: Casio Computer Co., Ltd.Inventors: Tetsushi Yoshida, Soichi Sato, Zenta Kikuchi
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Patent number: 5781265Abstract: A liquid crystal display according to this invention has a pair of transparent electrodes, a non-chiral smectic liquid crystal therebetween, a polarizer and an analyzer which are attached to the electrodes. The smectic layers are perpendicular to the electrodes and the liquid crystal has a twisted structure where the twist angle is twice the molecular tilt angle. In this configuration, the molecular director is forced to continuously rotate along the cone surface formed by the requirement that the molecules are tilted with respect to the layer normal and pinned at the surfaces. The basic principles of the optical modulation in the present invention are similar to those in twist nematic liquid crystal structures.Type: GrantFiled: October 22, 1996Date of Patent: July 14, 1998Assignee: Samsung Display Devices Co., Ltd.Inventor: Sin-Doo Lee
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Patent number: 5724109Abstract: A liquid crystal display panel including at least two liquid crystal layers, and a color filter having two color portions. One of the liquid crystal layers includes solid regions and liquid crystal dispersing regions arranged adjacent to the solid regions. Picture electrodes are arranged on the first plate, on the liquid crystal dispersing regions, and on the solid regions, at positions corresponding to the color portions of the color filter. A common electrode is arranged on the second plate. The picture elements on the liquid crystal dispersing regions and on the solid regions are connected to the conductors on the first plate by connecting members extending through the solid regions. Therefore, the liquid crystal layers can be independently controlled.Type: GrantFiled: September 1, 1995Date of Patent: March 3, 1998Assignee: Fujitsu LimitedInventors: Kimiaki Nakamura, Hidefumi Yoshida, Kazutaka Hanaoka, Hideaki Tsuda, Hideo Chida, Takahiro Sasaki