With Color Formed By Different Dye In Each Cell Patents (Class 349/79)
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Patent number: 12032188Abstract: Provided is an optically anisotropic film, an optical film, and a display device, which have a high contrast and excellent light fastness. The optically anisotropic film includes a liquid crystal compound and a dichroic substance, in which the liquid crystal compound is vertically aligned, the dichroic substance forms an arrangement structure, and in a case where, in a cross section observed with a scanning transmission electron microscope, a length of a major axis of the arrangement structure is defined as L, and a length of a minor axis of the arrangement structure is defined as D, 16 or more arrangement structures satisfying L?30 nm are observed per 40 ?m2.Type: GrantFiled: August 10, 2023Date of Patent: July 9, 2024Assignee: FUJIFILM CorporationInventors: Wataru Hoshino, Madoka Kawai, Shinya Watanabe, Takuya Inoue, Kengo Saito, Naoya Nishimura
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Patent number: 11182934Abstract: A system include a light source that is deficient of a first primary color, a display device to visually present a content using light beams of the light source, and a processing device to receive the content, calculate, taking into account an effect of deficiency of the first primary color in the light source, a metamer of a visual presentation of the content to compensate for the deficiency of the first primary color in the light source, wherein the calculated metamer when presented on the display device substantially preserves color appearance of the visual presentation rendered on the display device and substantially preserves a hue of the visual presentation by means of digital image processing that compensates for the effect of the deficiency of the first primary color on the color appearance, and provide, to the display device, the metamer of the visual presentation to display using the light beams.Type: GrantFiled: March 3, 2020Date of Patent: November 23, 2021Assignee: FOCAL SHARP, INC.Inventor: Kuang-Tsu Shih
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Patent number: 11018159Abstract: To provide a display device including a flexible panel that can be handled without seriously damaging a driver circuit or a connecting portion between circuits. The display device includes a bent portion obtained by bending an element substrate. A circuit for driving the display device is provided in the bent portion and a wiring extends from the circuit, whereby the strength of a portion including the circuit for driving the display device is increased and failure of the circuit is reduced. Furthermore, the element substrate is bent in a connecting portion between an external terminal electrode and an external connecting wiring (FPC) so that the element substrate provided with the external terminal electrode fits the external connecting wiring, whereby the strength of the connecting portion is increased.Type: GrantFiled: May 26, 2020Date of Patent: May 25, 2021Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Atsushi Miyaguchi
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Patent number: 10935852Abstract: A display panel and a display device are provided, the display panel includes: a first substrate and a second substrate opposite to each other; a liquid crystal layer between the first substrate and the second substrate; a first electrode layer between the first substrate and the liquid crystal layer; and a second electrode layer between the second substrate and the liquid crystal layer, wherein the liquid crystal layer at least includes a first liquid crystal layer and a second liquid crystal layer stacked on each other, and a spiral direction of liquid crystal in the first liquid crystal layer is opposite to a spiral direction of liquid crystal in the second liquid crystal layer.Type: GrantFiled: May 22, 2019Date of Patent: March 2, 2021Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Ming Zhu, Yuyao Wang, Feng Liao, Xiaochuan Chen, Xue Dong
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Patent number: 10690826Abstract: Methods of manufacturing a liquid crystal device including depositing a layer of liquid crystal material on a substrate and imprinting a pattern on the layer of liquid crystal material using an imprint template are disclosed. The liquid crystal material can be jet deposited. The imprint template can include surface relief features, Pancharatnam-Berry Phase Effect (PBPE) structures or diffractive structures. The liquid crystal device manufactured by the methods described herein can be used to manipulate light, such as for beam steering, wavefront shaping, separating wavelengths and/or polarizations, and combining different wavelengths and/or polarizations.Type: GrantFiled: June 14, 2016Date of Patent: June 23, 2020Assignee: Magic Leap, Inc.Inventors: Michael Anthony Klug, Brian T. Schowengerdt, Michael Nevin Miller, Vikramjit Singh, Christophe Peroz, Pierre St. Hilaire, Jie Sun
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Patent number: 9851599Abstract: A color Liquid Crystal Display (LCD) device for displaying a color image using at least four different primary colors, the device including an array of Liquid Crystal (LC) elements, driving circuitry adapted to receive an input corresponding to the color image and to selectively activate the LC elements of the LC array to produce an attenuation pattern corresponding to a gray-level representation of the color image, and an array of color sub-pixel filter elements juxtaposed and in registry with the array of LC elements such that each color sub-pixel filter element is in registry with one of the LC elements, wherein the array of color sub-pixel filter elements comprises at least four types of color sub-pixel filter elements, which transmit light of the at least four primary colors, respectively.Type: GrantFiled: November 5, 2014Date of Patent: December 26, 2017Assignee: Samsung Display Co., Ltd.Inventors: Ilan Ben-David, Shmuel Roth, Moshe Ben-Chorin
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Patent number: 9436013Abstract: A reflective type naked-eye 3D display apparatus and manufacturing method thereof are disclosed and the reflective type naked-eye 3D display apparatus comprises: a liquid crystal display panel (2). The reflective type naked-eye 3D display apparatus further comprises: a polarizing filter structure (1) disposed on the liquid crystal display panel (2), the polarizing filter structure (1) may comprise different regions where linear polarizing lights having different polarizing states are transmitted; a reflective layer structure (3) disposed under the liquid crystal display panel (2), the reflective layer structure (3) may comprise different regions where linear polarizing light of a preset direction is reflected or transmitted. The reflective type naked-eye 3D display apparatus can achieve a naked-eye type 3D displaying on the reflective type liquid crystal display panel.Type: GrantFiled: December 13, 2012Date of Patent: September 6, 2016Assignee: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Wenbo Li, Yanbing Wu
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Patent number: 9370094Abstract: To provide a display device including a flexible panel that can be handled without seriously damaging a driver circuit or a connecting portion between circuits. The display device includes a bent portion obtained by bending an element substrate. A circuit for driving the display device is provided in the bent portion and a wiring extends from the circuit, whereby the strength of a portion including the circuit for driving the display device is increased and failure of the circuit is reduced. Furthermore, the element substrate is bent in a connecting portion between an external terminal electrode and an external connecting wiring (FPC) so that the element substrate provided with the external terminal electrode fits the external connecting wiring, whereby the strength of the connecting portion is increased.Type: GrantFiled: September 16, 2013Date of Patent: June 14, 2016Assignee: Semiconductor Energy Laboratory Co., LTD.Inventor: Atsushi Miyaguchi
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Patent number: 9293511Abstract: A method for manufacturing a full color, reflective display includes the steps of depositing a first plurality of electrophoretic display elements in substantial registration with a first electrode and a second plurality of electrophoretic display elements in substantial registration with a second electrode. The electrophoretic display elements include a capsule containing a species of particles dispersed in a suspending fluid. The selective deposition of the display elements can be achieved by ink-jet printing methods, screen printing methods or other printing methods. In some embodiments the electrodes are printed onto the substrate before selective deposition of the display elements, while in other embodiments the substrate is provided having the electrodes already disposed on it. In still other embodiments, the sequence of printing of electrodes and electrophoretic display elements can be varied.Type: GrantFiled: October 30, 2009Date of Patent: March 22, 2016Assignee: E Ink CorporationInventors: Joseph M. Jacobson, Ian D. Morrison, Russell J. Wilcox, Paul Drzaic
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Patent number: 8953119Abstract: A display device includes a first electrode layer, a color switching layer which is disposed on the first electrode layer, a second electrode layer which is disposed on the color switching layer and a color filter layer which is disposed on the second electrode layer. The color switching layer includes a first color cell, which transmits incident light or changes incident light to a first color light, a second color cell, which transmits incident light or changes incident light to a second color light and a third color cell, which transmits incident light or changes incident light to a third color light. The color filter layer includes a first filter which transmits a cyan light, a second filter which transmits a magenta light and a third filter which transmits a yellow light.Type: GrantFiled: January 20, 2011Date of Patent: February 10, 2015Assignee: Samsung Electronics Co., Ltd.Inventors: Chang-ho Noh, Rupasree Ragini Das, Seog-jin Jeon
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Patent number: 8508835Abstract: A display structure is described comprising a displaying medium, a backplane provided with an active matrix and a pixel pad comprising a plurality of pixels having an inter-pixel spacing, said pixel pad superposing the active matrix, wherein the inter-pixel spacing is in the range of 2.5-40 micrometers, preferably in the range of 8-20 micrometers.Type: GrantFiled: November 2, 2010Date of Patent: August 13, 2013Assignee: Creator Technology B.V.Inventors: Nicolaas Aldegonda Jan Maria Van Aerle, Kevin Michael O'Neill, Petrus Johannes Gerardus Van Lieshout
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Patent number: 8502952Abstract: Color cholesteric liquid crystal display devices and fabrication methods thereof are provided. The color cholesteric liquid crystal display device includes a first substrate, a second substrate and a gap interposed therebetween. A patterned enclosed structure, formed by adhering a first patterned enclosed structure on the first substrate and a second patterned enclosed structure on the second substrate, is interposed between the first substrate and the second substrate, dividing a plurality of color sub-pixel channels. A plurality of the color cholesteric liquid crystals are respectively filled into each of the color sub-pixel channel, wherein the first patterned enclosed structure is tightly adhered to the second patterned enclosed structure so as to prevent mixing of the color cholesteric liquid crystals between adjacent color sub-pixel channels.Type: GrantFiled: December 15, 2010Date of Patent: August 6, 2013Assignee: Industrial Technology Research InstituteInventors: Yuan-Chang Liao, Yu-Cheng Lai, Yi-Shou Tsai, Kuan-Wei Wu
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Patent number: 8411220Abstract: A multi-domain vertical alignment liquid crystal display and a lower substrate thereof are disclosed. The voltage provided by coupling electrode lines is swung between a high voltage level and a low voltage level. Therefore, with different coupling of a large pixel electrode and of a small pixel electrode that both receive the same color displaying data, the voltage on the large pixel electrode is different from that on the small pixel electrode. The tilt angle of the liquid crystal between the large pixel electrode and the upper electrode is different from the tilt angle of the liquid crystal between the small pixel electrode and the upper electrode for compensating the gamma value of the color. Besides, through adjusting the value of the voltage respectively on the coupling electrode lines to compensate the gamma values of different colors and the gamma values of different colors will tend to be uniform.Type: GrantFiled: August 29, 2012Date of Patent: April 2, 2013Assignee: AU Optronics Corp.Inventor: Chih-Sheng Chen
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Patent number: 8279366Abstract: A multi-domain vertical alignment liquid crystal display and a lower substrate thereof are disclosed. The voltage provided by coupling electrode lines is swung between a high voltage level and a low voltage level. Therefore, with different coupling of a large pixel electrode and of a small pixel electrode that both receive the same color displaying data, the voltage on the large pixel electrode is different from that on the small pixel electrode. The tilt angle of the liquid crystal between the large pixel electrode and the upper electrode is different from the tilt angle of the liquid crystal between the small pixel electrode and the upper electrode for compensating the gamma value of the color. Besides, through adjusting the value of the voltage respectively on the coupling electrode lines to compensate the gamma values of different colors and the gamma values of different colors will tend to be uniform.Type: GrantFiled: February 19, 2009Date of Patent: October 2, 2012Assignee: AU Optronics Corp.Inventor: Chih-Sheng Chen
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Patent number: 8279374Abstract: The present invention relates to a fluorescent microscope and a remote control system thereof. The present invention reduces the size of the fluorescent microscope to facilitate transportation and management and be disposed in a narrow place such as the inside of the incubator or the clean bench, etc. and observes the samples through a remote control, thereby making it possible to improve the user convenience.Type: GrantFiled: May 14, 2010Date of Patent: October 2, 2012Assignee: Nanoentek, Inc.Inventors: Hwa Joon Park, Jeoung Ku Hwang, Chan Il Chung, Cha Hee Kim, Min Sung Kim
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Patent number: 8160348Abstract: A method and system for automatically evaluating quality of a slide-mounted tissue sample includes receiving a digital image of a magnified portion of the slide-mounted tissue sample. At least one quantitative quality indicator is automatically determined for at least one of the samples, and the digital image of the magnified portion of the sample. Each of the quantitative quality indicators is automatically compared to a respective minimum acceptable quality threshold. The quantitative quality indicators and associated quality thresholds are selected for suitability with an automated quantitative immunoassay. Failure of one or more of the quantitative quality indicators to meet its respective minimum acceptable quality threshold suggests that the sample is unsuitable for subsequent automated pathological evaluation.Type: GrantFiled: August 5, 2008Date of Patent: April 17, 2012Assignee: HistoRx, Inc.Inventors: Robert Pinard, Gregory R. Tedeschi, Christine Williams, Dongxiao Wang
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Patent number: 8111357Abstract: An optical element is arranged in such a manner that a screen thereof can be hardly observed from a predetermined direction, and a deterioration of an image quality caused by moire does not occur. The optical element is constituted by a first polarizing layer, a second polarizing layer, and a liquid crystal layer arranged between these two polarizing layers. In the optical element, absorption axes of the first polarizing layer and the second polarizing layer are located parallel to each other; the liquid crystal layer is made of hybrid-aligned discotic liquid crystal; and an alignment axis of the liquid crystal layer is located parallel to, or perpendicular to both absorption axes of the first polarizing layer and of the second polarizing layer.Type: GrantFiled: November 14, 2005Date of Patent: February 7, 2012Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Masaya Adachi, Osamu Itou, Shinichi Komura
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Patent number: 8102499Abstract: The invention provide a fabrication method for a color cholesteric liquid crystal display device, comprising: providing a first substrate; forming a patterned enclosed structure on the first substrate, wherein the patterned enclosed structure comprises a plurality of stripe wall structures, and one end of each stripe wall structure is connected to and perpendicular to a straight seal line, thereby dividing a first LC channel with a first opening, a second closed LC channel, and a third closed LC channel, and the length of the first LC channel exceeds that of the second LC channel, and the length of the second LC channel exceeds that of the third LC channel; providing a second substrate with an adhesion layer formed thereon; assembling the first substrate and the second substrate to tightly seal the adhesion layer and the patterned enclosed structure.Type: GrantFiled: November 29, 2010Date of Patent: January 24, 2012Assignee: Industrial Technology Research InstituteInventors: Yuan-Chang Liao, Jen-Chieh Yang, Kuo-Lung Lo
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Patent number: 8063862Abstract: A liquid crystal display device includes a display section which enables color display in each of pixels, and a gradation control unit which controls a gradation level in each of the pixels. The display section includes a first white display structure which is configured to combine primary colors and to display white, and a second white display structure which is configured to include a color with a chromaticity different from a chromaticity of the primary color of the first white display structure and to display white. The gradation control unit has a first control mode in which the gradation level of each pixel is controlled by one of the first white display structure and the second white display structure, and a second control mode in which the gradation level of each pixel is controlled by a combination of the first white display structure and the second white display structure.Type: GrantFiled: October 20, 2006Date of Patent: November 22, 2011Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventor: Yuuzo Hisatake
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Patent number: 7898625Abstract: A liquid crystal device including a pair of electrodes provided with a vertical alignment film and a liquid crystal layer disposed between the pair of electrodes and including a liquid crystal composition containing a liquid crystal with positive dielectric anisotropy, a dichroic dye and a chiral reagent, with a ratio (P/G) of a chiral pitch length (P) of the liquid crystal composition to a gap (G) between the pair of electrodes being from 0.06 to less than 1.0.Type: GrantFiled: August 28, 2008Date of Patent: March 1, 2011Assignee: Fujifilm CorporationInventors: Naoyuki Hayashi, Takashi Kato, Koji Takaku, Katsuyuki Yofu
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Patent number: 7864285Abstract: Color cholesteric liquid crystal display devices and fabrication methods thereof are provided. The color cholesteric liquid crystal display device includes a first substrate, a second substrate and a gap interposed therebetween. A patterned enclosed structure is interposed between the first substrate and the second substrate dividing a plurality of color sub-pixel channels. A plurality of color cholesteric liquid crystals are respectively filled in each of the color sub-pixel channel, wherein an adhesion layer is tightly adhered between the second substrate and the patterned enclosed structure so as to prevent mixing of the color cholesteric liquid crystals between adjacent color sub-pixel channels.Type: GrantFiled: December 4, 2007Date of Patent: January 4, 2011Assignee: Industrial Technology Research InstituteInventors: Yuan-Chang Liao, Jen-Chieh Yang, Kuo-Lung Lo
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Patent number: 7692189Abstract: A colorant molecule is provided that includes at least one switch unit. The switch unit comprises ring-based tautomers, of which there may be more than one per chromophore, and may include donor and/or acceptor moieties.Type: GrantFiled: April 26, 2007Date of Patent: April 6, 2010Assignee: Hewlett-Packard Development Company, L.P.Inventors: Kent D. Vincent, Xian-An Zhang, Zhou-Lin Zhou
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Patent number: 7633586Abstract: A display is provided for switching between a narrow or private viewing mode and a wide or public viewing mode. The display comprises a display device which is controlled to provide display of a desired image or sequence of images. This is associated with a liquid crystal device having at least one liquid crystal layer whose molecules are switchable between a first state providing a first angular viewing range and a second state providing a second angular viewing range which is within and smaller than the first angular viewing range. With the molecules in the second state, the device at least partially blocks light propagating towards part of the first angular viewing range outside the second angular viewing range. The or each liquid crystal layer is in contact with at least one alignment surface, the or each of which comprises a uniform non-patterned alignment surface.Type: GrantFiled: April 19, 2005Date of Patent: December 15, 2009Assignee: Sharp Kabushiki KaishaInventors: Robert Winlow, Zabbie J. Acosta, Martin D. Tillin, Paul Bonnett, Diana U. Kean, Grant Bourhill, Michel Sagardoyburu, Emma Jayne Walton, Koji Yabuta, Hiroshi Fukushima, Tomoo Takatani
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Patent number: 7586550Abstract: A liquid crystal display (LCD) panel and manufacturing method thereof capable of ensuring an aperture ratio while reducing the number of data lines by a change of an arrangement structure of subpixels includes a plurality of subpixels constituting a display region, a plurality of thin film transistors (TFTs) connected respectively to the plurality of subpixels, a plurality of gate lines connected to the TFTs and formed along long sides of the subpixels, a plurality of data lines connected to the TFTs and formed along short sides of the subpixels, a plurality of storage lines formed to pass through the subpixels along the short sides of the subpixels, a first common storage line connected commonly to one end of each of the plurality of storage lines, and a second common storage line connected commonly to an opposite end of each of the plurality of storage lines.Type: GrantFiled: July 14, 2006Date of Patent: September 8, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Jeong Il Kim, Dong Gyu Kim, Yeong Keun Kwon
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Patent number: 7576478Abstract: The invention relates to light emitting devices (2) with variable output color. More specifically, the inventions provides a color conversion cell (10) which can be positioned in front of a light source (4) in order to generate other color or color temperatures. Typically the light source is a light emitting diode (LED) which is power efficient but emits in a narrow and fixed spectra. The new colors are generated by photoluminescence in fluorescent dyes contained in the cell. The color converting of the cell is electrically controllable, preferably by controlling the orientation, density or distribution of the fluorescent dyes, or by controlling a pathlength of the light in the cell.Type: GrantFiled: April 6, 2005Date of Patent: August 18, 2009Assignee: Koninklijke Philips Electronics N.V.Inventor: Rifat Ata Mustafa Hikmet
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Patent number: 7548291Abstract: The present invention provides a reflective type liquid crystal display device and fabricating method thereof, by which resolution is enhanced in a manner of representing two colors from one sub-pixel. The present invention includes a first substrate having a plurality of thin film transistors and a plurality of pixel electrodes within a plurality of sub-pixels defined by a plurality of gate and data lines perpendicularly crossing with each other, respectively, a second substrate assembled to the first substrate to confront, a liquid crystal layer between the first and second substrates, a third substrate assembled to the first substrate to confront, a plurality of reflective electrodes on an inside of the third substrate to correspond to a plurality of the sub-pixels, respectively, and a color filter layer having a plurality of electrophoretic bodies on a plurality of the reflective electrodes wherein each of the electrophoretic bodies is micro-encapsulated with ionic pigment particles.Type: GrantFiled: October 15, 2004Date of Patent: June 16, 2009Assignee: LG Display LCD Co., Ltd.Inventors: Jong Hwae Lee, Jae Hong Hur
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Patent number: 7468770Abstract: A liquid crystal display device includes a display panel and a viewing angle control panel. The viewing angle control panel includes a pair of substrates, a liquid crystal layer interposed between the pair of substrates, and a pair of electrodes for applying an electric field to the liquid crystal layer. The liquid crystal layer is composed from hybrid-aligned liquid crystal molecules. The viewing angle of the display panel is controlled by changing an alignment state of the hybrid-aligned liquid crystal molecules in the liquid crystal layer by voltage applied by the electrodes.Type: GrantFiled: February 25, 2005Date of Patent: December 23, 2008Assignee: Seiko Epson CorporationInventor: Osamu Okumura
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Patent number: 7274416Abstract: A subtractive display device comprising picture elements having sub-pixels, each sub-pixel comprising a stack of switchable layers (5,25) or components and a color filter part (21).Type: GrantFiled: February 7, 2003Date of Patent: September 25, 2007Assignee: Koninklijke Philips Electronics, N.V.Inventors: Bokke Johannes Feenstra, Robert Andrew Hayes, Lucas Josef Maria Schlangen
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Patent number: 7180558Abstract: The invention relates to a DSTN display with electromagnetic protection, comprising an active cell (1) and a passive cell (2), whereby the active cell (1) comprises electrodes (12, 13) and the passive cell (2) faces an observer of the display. The passive cell (2) comprises a metallic transparent layer (18, 19). Said metallic layer (18, 19) is electrically connected to a ground potential (G).Type: GrantFiled: May 28, 2003Date of Patent: February 20, 2007Assignee: Siemens AktiengesellschaftInventors: Peter Brandt, Georg Nehm, Werner Paulsen, Jürgen Wenning
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Patent number: 6790490Abstract: This invention relates to a polyvinyl alcohol type polarizing film or plate which comprises a water-soluble dye having the formula (1) in a free acid form or a copper complex salt thereof. The said polarizing plate has excellent polarizing performance capability and durability, and is suitably used for the green channel of a liquid crystal projector when B in formula (1) is a benzoylamino group and the water-soluble dye has a wavelength for maximum absorption (&lgr;max) of 520 nm or more and less than 580 nm.Type: GrantFiled: December 17, 2001Date of Patent: September 14, 2004Assignee: Nippon Kayaku Kabushiki KaishaInventors: Shoji Oiso, Kumiko Ishii, Yoshitaka Kajiwara, Toru Tabei
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Patent number: 6750928Abstract: A reflective-type multi-color display device is capable of obtaining a vivid and bright multi-color display with less display layers, and therefore, with a state where a parallax is decreased and a cost of the device can be reduced. Specifically, the display device of the present invention includes a cell 51 having a display layer 31 comprising a right-handed cholesteric liquid crystal which selects and reflects blue, a cell 53 having a display layer 33 comprising a left-handed cholesteric liquid crystal which selects and reflects green, a cell 57 having a display layer 37 comprising a right-handed cholesteric liquid crystal which selects and reflects yellow and a cell 55 having a display layer 35 comprising a left-handed cholesteric liquid crystal which selects and reflects red, these layers being laminated in this order from the observation side. A color filter 43 which transmits red and absorbs the other color light is provided between the cell 57 and the cell 55.Type: GrantFiled: May 9, 2003Date of Patent: June 15, 2004Assignee: Fuji Xerox Co., Ltd.Inventors: Naoki Hiji, Shigeru Yamamoto, Takehito Hikichi, Teiichi Suzuki
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Patent number: 6717638Abstract: A liquid crystal display (LCD) device having a color filter on a thin film transistor (TFT) structure (COT structure). The color filter layers are formed on the same substrate as the TFT to be in direct contact with the source and drain electrodes without any intermediaries therebetween. In particular, there is no need for a passivation layer between the TFT and the color filter layers. Preferred embodiments include a back etched type TFT that does not require a light shielding layer, an etch-stopped type TFT having an etch stop layer, and a coplanar type TFT having a light shielding layer below the gate electrode of the TFT.Type: GrantFiled: November 15, 2000Date of Patent: April 6, 2004Assignee: LG. Philips LCD Co., Ltd.Inventor: Woong-Kwon Kim
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Patent number: 6525707Abstract: A liquid crystal display device capable of displaying in multiple colors, and a method for driving the liquid crystal display device using a typical monochrome liquid crystal driving IC. A display portion of a birefringence color liquid crystal display device has a usual letter display portion (41) for displaying letters in a single color and a mark display portion (42) for displaying a variety of colors. A liquid crystal cell is driven by supplying scanning signals to scanning electrodes for the letter display portion (41) and data signals to scanning electrodes for the mark display portion (42).Type: GrantFiled: July 26, 1999Date of Patent: February 25, 2003Assignee: Citizen Watch Co., Ltd.Inventors: Yasushi Kaneko, Kazuhiko Yoshikawa
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Patent number: 6417909Abstract: A liquid crystal panel has a pair of substrates disposed almost parallel to each other. On each of the substrates, an electrode and an alignment film are formed. A liquid crystal layer having a negative dielectric anisotropy is sandwiched by the substrates. In the absence of voltage applied across the electrodes, the molecules of the liquid crystal layer align almost perpendicular to the substrates. In this liquid crystal layer, a dichroic dye, preferably a blue dichroic dye, is added to absorb the yellow component of an incident light. Instead of adding the dye into the liquid crystal layer, a color compensation layer containing the dye is formed on or adjacent to at least one of the substrates. The yellow component of an incident light to the liquid crystal panel is absorbed by the color compensation layer. As a result, the liquid crystal panel and the liquid crystal display using the panel do not show yellow coloring when the panel is observed from oblique directions.Type: GrantFiled: July 10, 2000Date of Patent: July 9, 2002Assignee: Fujitsu LimitedInventors: Hidefumi Yoshida, Katsufumi Ohmuro
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Patent number: 6372560Abstract: A simplified process for forming a thin film transistor matrix for a liquid crystal display is disclosed. By forming and patterning a conductive layer overlying a TFT unit, a data line, a first connection line between the TFT unit and the data line, and a second connection line between the TFT unit and a pixel electrode can be simultaneously formed in the forming and patterning step. Furthermore, after a passivation layer is applied to protect the TFT matrix, an isolation window area, a contact hole and a TAB window can be created in a single patterning step. Therefore, masking steps can be reduced so as to simplify the process. On the other hand, owing to the first connection line for connecting the TFT unit and the scan line is of the same material as the scan line, the resistivity of the connection line is inherently low. Therefore, a TFTLCD of a large area can be made according to this process.Type: GrantFiled: March 31, 2000Date of Patent: April 16, 2002Assignee: Hannstar Display Corp.Inventors: Tean-Sen Jen, Jia-Shyong Cheng
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Patent number: 6346974Abstract: A retardation film type guest host liquid crystal display is arranged to reduce coloring in dark representation and to be energy-effective. The liquid crystal display includes a liquid crystal layer containing a given amount of dichroic dye and having a twist alignment, a reflective plate, and a phase plate located between the liquid crystal layer and the reflective plate. The phase plate has a slow axis set at 45 degrees against the alignment direction of the liquid crystal and a retardation set at a half of a phase difference between an ordinary ray before reflection by said reflective plate and an extraordinary ray after reflection.Type: GrantFiled: November 1, 1999Date of Patent: February 12, 2002Assignee: Hitachi, Ltd.Inventors: Osamu Itou, Shinichi Komura
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Publication number: 20010055080Abstract: A liquid crystal display device of this invention includes a yellow guest-host liquid crystal layer, a magenta guest-host liquid crystal layer, and a cyan guest-host liquid crystal layer. The absorption spectrum of each color has at least two absorption peaks, and the absorbance of the second largest absorption peak is 80% or more that of the largest absorption peak.Type: ApplicationFiled: March 5, 1997Publication date: December 27, 2001Inventors: KATSUYUKI NAITO, HIROKI IWANAGA, AIRA HOTTA, KAZUYUKI SUNOHARA
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Patent number: 6181393Abstract: A liquid crystal display device of this invention includes a substrate having a pixel electrode on one major surface, a liquid crystal layer including first and second liquid crystal microcapsule layers sequentially stacked on the pixel electrode of the substrate, and a counter electrode formed on the liquid crystal layer. Each of the first and second liquid crystal microcapsule layers contains a plurality of aspherical liquid crystal microcapsules each formed by encapsulating a liquid crystal material containing a liquid crystal compound and a dichroic dye with a transparent film. The major axes of aspherical liquid crystal microcapsules contained in the first liquid crystal microcapsule layer are aligned in a first direction. The major axes of aspherical liquid crystal microcapsules contained in the second liquid crystal microcapsule layer are aligned in a second direction different from the first direction.Type: GrantFiled: December 24, 1998Date of Patent: January 30, 2001Assignee: Kabushiki Kaisha ToshibaInventors: Shintaro Enomoto, Aira Hotta, Yuko Kizu, Hiroki Iwanaga, Masao Tanaka, Seizaburo Shimizu, Kazuyuki Sunohara
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Patent number: 6147740Abstract: A liquid crystal panel has a pair of substrates disposed almost parallel to each other. On each of the substrates, an electrode and an alignment film are formed. A liquid crystal layer having a negative dielectric anisotropy is sandwiched by the substrates. In the absence of voltage applied across the electrodes, the molecules of the liquid crystal layer align almost perpendicular to the substrates. In this liquid crystal layer, a dichroic dye, preferably a blue dichroic dye, is added to absorb the yellow component of an incident light. Instead of adding the dye into the liquid crystal layer, a color compensation layer containing the dye is formed on or adjacent to at least one of the substrates. The yellow component of an incident light to the liquid crystal panel is absorbed by the color compensation layer. As a result, the liquid crystal panel and the liquid crystal display using the panel do not show yellow coloring when the panel is observed from oblique directions.Type: GrantFiled: September 10, 1997Date of Patent: November 14, 2000Assignee: Fujitsu LimitedInventors: Hidefumi Yoshida, Katsufumi Ohmuro
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Patent number: 6055031Abstract: A novel multi-layer display cell is disclosed in which contrast ratios similar to that available from cells which use polarisers are achieved, as well as levels of reflectivity similar to that available from cells that do not use polarisers. This is achieved by using two or more compartments for the display cell separated by dielectric membranes. The electro-optic characteristics of the mixture in the two compartments differs in that the mixture in one of the compartments switches at a low voltage, being switched completely below the switching threshold of material in the other of the compartments.Type: GrantFiled: August 3, 1998Date of Patent: April 25, 2000Assignee: International Business Machines CorporationInventor: Anthony Cyril Lowe
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Patent number: 5986729Abstract: An object of the present invention is to provide a liquid crystal display device free from color displacement and having improved contrast ratio as well as an improved aperture ratio. The object is attained by the following structure comprising a substrate having a pixel electrode and a driving element, liquid crystal layers stacked on a substrate, a transparent pixel electrode interposed between the stacked liquid crystal layers, and a driving element provided on the substrate. The transparent pixel electrode is electrically connected to the driving element through an opening formed in a specified region of the liquid crystal layer. Each of the liquid crystal layers is composed of microcapsules each containing a liquid crystal and a binder for binding the microcapsules. An insulating layer is provided between the pixel electrode on the substrate and the liquid crystal layer or between the pixel electrode interposed between the liquid crystal layers and the liquid crystal layer.Type: GrantFiled: July 8, 1997Date of Patent: November 16, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuhiko Yamanaka, Naohide Wakita
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Patent number: 5958291Abstract: This liquid crystal display element is featured in that it comprises, a substrate provided on one main surface thereof with an electrode, a 3-ply GH liquid crystal layer superimposed on the substrate, each GH liquid crystal layer being different in absorption wavelength from each other and containing a host liquid crystal and a guest dichroic dye, and three transparent electrode layers, each formed on each of the GH liquid crystal layer, wherein at least one layer out of the 3-ply GH liquid crystal layer contains a fluorine-based liquid crystal and an anthraquinone-based magenta or cyan dichroic dye having at least two arylthio groups.Type: GrantFiled: August 27, 1997Date of Patent: September 28, 1999Assignee: Kabushiki Kaisha ToshibaInventors: Katsuyuki Naito, Hiroki Iwanaga
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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
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Patent number: 5712695Abstract: A liquid crystal display device comprises: a first substrate formed with a plurality of liquid crystal driving active elements; first, second and third liquid crystal cells stacked in this order on an inter-layer film formed on the first substrate; and a second substrate disposed on the third liquid crystal cell with intervention of a planarizing film; wherein the first, second and third liquid crystal cells each have a counter electrode, a liquid crystal layer and a driving electrode connected to a corresponding one of the liquid crystal driving active elements formed on the first substrate, and are each electrically isolated by an insulating layer from the counter electrode and driving electrode of an adjacent liquid crystal cell.Type: GrantFiled: June 17, 1996Date of Patent: January 27, 1998Assignee: Sharp Kabushiki KaishaInventors: Atsushi Tanaka, Seiichi Mitsui, Shigeru Aomori
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Patent number: 5625474Abstract: A full-color liquid crystal display device is provided which includes: a first substrate formed with a plurality of liquid crystal driving active elements; and first, second and third liquid crystal cells stacked one on another on an inter-layer film formed on the first substrate; the first liquid crystal cell including a first liquid crystal driving electrode connected to a first liquid crystal driving active element formed on the first substrate; the second liquid crystal cell formed on the second substrate and including a second liquid crystal driving electrode connected to a second liquid crystal driving active element formed on the first substrate via a lower stereo-interconnection extending through the first liquid crystal cell; the third liquid crystal cell formed on the third substrate and including a third liquid crystal driving electrode connected to a third liquid crystal driving active element formed on the first substrate via another lower stereo-interconnection extending through the first liquidType: GrantFiled: May 31, 1996Date of Patent: April 29, 1997Assignee: Sharp Kabushiki KaishaInventors: Shigeru Aomori, Atsushi Tanaka, Seiichi Mitsui