With Particular Non-zero And Non-90 Angle Between Opposite Polarization Axes Patents (Class 349/103)
  • Patent number: 10944070
    Abstract: A display device having improved reliability includes: a display panel including a substrate and an encapsulation layer, the substrate including a display area and a non-display area, and the encapsulation layer being located on the substrate at the display area; and a window on the display panel, and the substrate has a convex shape and has a plurality of first grooves arranged at an outer circumferential surface of the substrate.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: March 9, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Dongho Kim, Youngjin Ko, Minsoo Kim
  • Patent number: 10937977
    Abstract: A light emitting element includes a flexible plate-like portion having a glass substrate, and an organic functional layer formed on one surface side of the glass substrate. The organic functional layer includes a light emitting layer. When the plate-like portion is curved in a prescribed curving direction, and one surface of the plate-like portion is a concave surface, and the other surface thereof is a convex surface, a surface which is positioned on the concave surface side among both surfaces of the glass substrate is referred to as a first surface. When the plate-like portion is curved in a curving direction, and the one surface of the plate-like portion is a concave surface, and the other surface thereof is a convex surface, a compressive stress is applied to a portion whose distance from the first surface of the glass substrate is less than or equal to L (L>T/2).
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: March 2, 2021
    Assignee: PIONEER CORPORATION
    Inventor: Takeru Okada
  • Patent number: 10665795
    Abstract: A light emitting element includes a flexible plate-like portion having a glass substrate, and an organic functional layer formed on one surface side of the glass substrate. The organic functional layer includes a light emitting layer. When the plate-like portion is curved in a prescribed curving direction, and one surface of the plate-like portion is a concave surface, and the other surface thereof is a convex surface, a surface which is positioned on the concave surface side among both surfaces of the glass substrate is referred to as a first surface. When the plate-like portion is curved in a curving direction, and the one surface of the plate-like portion is a concave surface, and the other surface thereof is a convex surface, a compressive stress is applied to a portion whose distance from the first surface of the glass substrate is less than or equal to L (L>T/2).
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: May 26, 2020
    Assignee: PIONEER CORPORATION
    Inventor: Takeru Okada
  • Patent number: 10139672
    Abstract: A liquid crystal display includes: a substrate including a plurality of pixel areas; a TFT disposed on the substrate; a pixel electrode connected with the TFT and disposed on the TFT; a common electrode positioned on the pixel electrode and separated from the pixel electrode by a microcavity; a roof layer disposed on the common electrode; an injection hole disposed in the common electrode and the roof layer along a long-axial direction of the substrate to expose a part of the microcavity; a liquid crystal layer filling the microcavity; a first polarizer having a polarization axis in a short-axial direction of the substrate on the roof layer; and a second polarizer having a polarization axis in a long-axial direction of the substrate below the substrate, in which heights of edges in the long-axial and short-axial directions of the substrate are larger than a height of the center of the substrate.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: November 27, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min-Woo Lee, Dae Ho Song, Woo Jae Lee
  • Patent number: 9523881
    Abstract: A liquid crystal display includes: a substrate including a plurality of pixel areas; a TFT disposed on the substrate; a pixel electrode connected with the TFT and disposed on the TFT; a common electrode positioned on the pixel electrode and separated from the pixel electrode by a microcavity; a roof layer disposed on the common electrode; an injection hole disposed in the common electrode and the roof layer along a long-axial direction of the substrate to expose a part of the microcavity; a liquid crystal layer filling the microcavity; a first polarizer having a polarization axis in a short-axial direction of the substrate on the roof layer; and a second polarizer having a polarization axis in a long-axial direction of the substrate below the substrate, in which heights of edges in the long-axial and short-axial directions of the substrate are larger than a height of the center of the substrate.
    Type: Grant
    Filed: August 18, 2014
    Date of Patent: December 20, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min-Woo Lee, Dae Ho Song, Woo Jae Lee
  • Patent number: 9097944
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate including a first source line and a second source line, a first main pixel electrode of a strip shape, a second main pixel electrode of a strip shape. The first substrate is configured such that a first distance between the first main pixel electrode and the first source line is less than a second distance between the first main pixel electrode and the second source line, and a third distance between the second main pixel electrode and the first source line is greater than a fourth distance between the second main pixel electrode and the second source line.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: August 4, 2015
    Assignee: Japan Display Inc.
    Inventor: Jin Hirosawa
  • Patent number: 9013657
    Abstract: A liquid crystal device includes a liquid crystal panel including a pair of substrates that sandwiches a liquid crystal layer containing liquid crystal molecules exhibiting a parallel alignment in an initial alignment state, and a polarizing plate disposed on either side of the liquid crystal panel. The liquid crystal molecules are inclined at a pretilt angle and aligned in a predetermined direction in planes of the substrates. The liquid crystal panel emits light entering through one of the polarizing plates toward the other. The liquid crystal panel emits light having the maximum intensity in a direction different from a direction normal to the substrates. The azimuth of the maximum-light-intensity direction projected onto the planes of the substrates is substantially parallel to the predetermined direction.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: April 21, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Osamu Okumura
  • Publication number: 20140375935
    Abstract: An organic EL display device includes at least a polarizer layer, a ?/2 plate, a ?/4 plate and an organic EL panel in this order, and an in-plane retardation Re2(550) of the ?/4 plate at 550 nm satisfies 115?Re2(550)?155, and an in-plane retardation Re1(550) of the ?/2 plate at 550 nm satisfies Re1(550)=2×Re2(550)±50 nm.
    Type: Application
    Filed: September 12, 2014
    Publication date: December 25, 2014
    Applicant: FUJIFILM Corporation
    Inventors: Naoyoshi YAMADA, Yuusuke FURUKI, Jun WATANABE, Makoto ISHIGURO, Shinpei YOSHIDA
  • Patent number: 8913219
    Abstract: An IPS-mode transflective LCD device includes an array of pixels each including a reflective region and a transmissive region. The reflective region operates in a normally-white mode, and the transmissive region operates in a normally-black mode. A first potential is applied to a liquid crystal layer in the reflective region, and a second potential is applied to the liquid crystal layer in the transmissive region. The first and second potential have therebetween an opposite magnitude relationship in each of the pixels.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: December 16, 2014
    Assignee: NLT Technologies, Ltd.
    Inventors: Michiaki Sakamoto, Jin Matsushima, Hiroshi Nagai, Kenichi Mori, Hidenori Ikeno, Yasuki Kudo, Ken Sumiyoshi
  • Patent number: 8885122
    Abstract: A light emitting diode includes a first grid layer on a substrate and made of a metal material; a p-n semiconductor multiple-layered film on the first grid layer; and a second grid layer on the p-n semiconductor multiple-layered film and made of a metal material, wherein the first grid layer includes a base layer, and a plurality of first grid wires that protrudes from the base layer and are along a first direction, wherein the second grid layer includes a plurality of second grid wires along a second direction, and wherein the p-n semiconductor multiple-layered film includes an active layer, a n type semiconductor layer between the first grid layer and the active layer, and a p type semiconductor layer between the second grid layer and the active layer.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: November 11, 2014
    Assignee: LG Display Co., Ltd.
    Inventor: Min-Sung Yoon
  • Publication number: 20140300847
    Abstract: A display apparatus including a display panel, a first polarizer and a second polarizer is provided. The display panel includes a pixel array substrate, an opposite substrate and a display medium. The pixel array substrate includes a plurality of pixel units. Each pixel unit includes a first electrode and a second electrode. The first electrode and the second electrode are alternately arranged and a lateral electric field is existed between the first electrode and the second electrode. The opposite substrate is disposed opposite to the pixel array substrate. The display medium is disposed between the pixel array substrate and the opposite substrate. The first polarizer is disposed on the pixel array substrate. The second polarizer is disposed on the opposite substrate. An included angle between an optical axis of the first polarizer and an optical axis of the second polarizer is 90°±?, and ? is 1° to 9°.
    Type: Application
    Filed: December 9, 2013
    Publication date: October 9, 2014
    Applicants: University of Central Florida Research Foundation , Inc., Au Optronics Corporation
    Inventors: Yi-Fan Liu, Shin-Tson Wu, Yi-Fen Lan, Cheng-Yeh Tsai
  • Patent number: 8797482
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate including a first insulative substrate, and a first electrode, a second substrate including a second insulative substrate, and a second electrode, a liquid crystal layer held between the first substrate and the second substrate, a first polarizer including a first polarization axis, and a second polarizer including a second polarization, wherein the first polarization axis is substantially parallel or substantially perpendicular to the direction of extension of the first electrode.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: August 5, 2014
    Assignee: Japan Display Inc.
    Inventors: Keiji Tago, Jin Hirosawa, Hirokazu Morimoto
  • Patent number: 8773621
    Abstract: A liquid crystal device includes a liquid crystal panel including a pair of substrates that sandwiches a liquid crystal layer containing liquid crystal molecules exhibiting a parallel alignment in an initial alignment state, and a polarizing plate disposed on either side of the liquid crystal panel. The liquid crystal molecules are inclined at a pretilt angle and aligned in a predetermined direction in planes of the substrates. The liquid crystal panel emits light entering through one of the polarizing plates toward the other. The liquid crystal panel emits light having the maximum intensity in a direction different from a direction normal to the substrates. The azimuth of the maximum-light-intensity direction projected onto the planes of the substrates is substantially parallel to the predetermined direction.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: July 8, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Osamu Okumura
  • Patent number: 8773623
    Abstract: An IPS-mode transflective LCD device includes an array of pixels each including a reflective region and a transmissive region. A first pixel electrode and a first common electrode are formed in the reflective region, and a second pixel electrode and a second common electrode are formed in the transmissive region. The first and second pixel electrodes receive a common pixel signal. The first common electrode receives a first common signal which is common among the reflective regions of a plurality of pixels, and the second common electrode receives a second common signal which is common among the transmissive regions of the plurality of pixels.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 8, 2014
    Assignee: NLT Technologies, Ltd.
    Inventors: Michiaki Sakamoto, Jin Matsushima, Hiroshi Nagai, Kenichi Mori, Hidenori Ikeno, Yasuki Kudo, Ken Sumiyoshi
  • Patent number: 8773619
    Abstract: A liquid crystal display includes a liquid crystal panel, a first polarizer plate stacked on an upper surface of the liquid crystal panel, and a second polarizer plate stacked on a lower surface of the liquid crystal panel. The first polarizer plate may have an absorption axis inclination of +0.1 to +0.2 degrees, or the second polarizer plate may have an absorption axis inclination of ?0.04 to less than 0 or greater than 0 to +0.1 degrees.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: July 8, 2014
    Assignee: Cheil Industries, Inc.
    Inventors: Chang Seok Bae, Ae Kyoung Kim, Hae Ryong Chung, Han Su Kim, Eun Jae Cho
  • Publication number: 20140132898
    Abstract: The invention discloses a display panel, which comprises a liquid crystal cell, an upper polarizer sheet arranged above the liquid crystal cell, a lower polarizer sheet arranged under the liquid crystal cell and a transflective film arranged under the lower polarizer sheet. The invention further discloses a display device comprising the above display panel. By the invention, not only the transflective display has an improved effect, but also the transflective display has a simple structure and an inexpensive cost in comparison with the existing transflective display mode.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 15, 2014
    Applicant: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Guangkui Qin, Jae Geon You
  • Publication number: 20140043568
    Abstract: A display apparatus includes a display panel disposed between a first polarizer and a second polarizer and having at least one first area and at least one second area. A first light-transmission axis direction of the first polarizer is substantially perpendicular to a second light-transmission axis direction of the second polarizer. The first light-transmission axis direction intersects a horizontal axis direction by about 45 degrees. When the display panel is in a narrow viewing angle display mode, the first and second areas have different brightness in a side viewing angle direction but have the same brightness in and around a normal viewing angle direction. When the display panel is in a wide viewing angle display mode, the first and second areas have substantially the same brightness in various viewing angle directions.
    Type: Application
    Filed: October 18, 2013
    Publication date: February 13, 2014
    Applicant: Au Optronics Corporation
    Inventors: Chao-Wei Yeh, Chien-Huang Liao, Wen-Hao Hsu
  • Publication number: 20130321748
    Abstract: The present invention provides a PSVA liquid crystal display panel, a liquid crystal display panel and a liquid crystal display device. The liquid crystal display panel includes upper and lower substrates, disposed oppositely, with liquid crystal sandwiched between upper and lower substrates; liquid crystal molecules in liquid crystal vertically aligned; surfaces of upper and lower substrates having upper and lower polarizers respectively, optical axes of upper and lower polarizers perpendicular to each other; surface of upper polarizer closer to lower polarizer having upper quarter waveplate, surface of lower polarizer closer to upper polarizer having a lower quarter waveplate; wherein slow axis of upper quarter waveplate and slow axis of lower quarter waveplate forming 45° angle with optical axes of upper and lower polarizers respectively, slow axes of upper and lower quarter waveplates perpendicular to each other so as to ensure high transmittance and response speed.
    Type: Application
    Filed: June 11, 2012
    Publication date: December 5, 2013
    Applicant: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO. LTD.
    Inventor: Chih-tsung Kang
  • Patent number: 8436967
    Abstract: An IPS-mode transflective LCD device includes an array of pixels each including a reflective region and a transmissive region juxtaposed. The reflective region operates in a normally-white mode, and the transmissive region operates in a normally-black mode. A common data signal is supplied to the reflective region and transmissive region, whereas the common electrode signal in the transmissive region is an inverted signal of the common electrode signal in the reflective region, to thereby obtain similar gray-scale levels.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: May 7, 2013
    Assignee: NLT Technologies, Ltd.
    Inventors: Michiaki Sakamoto, Jin Matsushima, Hiroshi Nagai, Kenichi Mori, Hidenori Ikeno, Yasuki Kudo, Ken Sumiyoshi
  • Patent number: 8395728
    Abstract: In a liquid crystal display apparatus in which a liquid crystal layer is twist-aligned when no electric field is applied, ?nd value of a liquid crystal layer in a wavelength of 550 nm is 300 to 400 nm, each of directions of polarizing axes of pair of linear polarizers is substantially parallel or vertical to the alignment direction of liquid crystal molecules in each end face of the liquid crystal layer that is closer to each of linear polarizers, and the angle between polarizing axes of the pair of linear polarizers is 85° or larger and smaller than 90°. In a liquid crystal display apparatus in which a liquid crystal layer is aligned to be substantially vertical when no electric field is applied, the angle between polarizing axes of the pair of linear polarizers is 85° or larger and smaller than 90°.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: March 12, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yoshimitsu Ishikawa
  • Publication number: 20130033663
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate including a first insulative substrate, and a first electrode, a second substrate including a second insulative substrate, and a second electrode, a liquid crystal layer held between the first substrate and the second substrate, a first polarizer including a first polarization axis, and a second polarizer including a second polarization, wherein the first polarization axis is substantially parallel or substantially perpendicular to the direction of extension of the first electrode.
    Type: Application
    Filed: March 7, 2012
    Publication date: February 7, 2013
    Inventors: Keiji TAGO, Jin HIROSAWA, Hirokazu MORIMOTO
  • Publication number: 20130010237
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate including a first source line and a second source line, a pixel electrode, and a first alignment film, a second substrate including an insulative substrate, a shield electrode, a black matrix, a color filter, an overcoat layer, a common electrode, and a second alignment film, and a liquid crystal layer, wherein a surface resistance of the shield electrode is higher than a surface resistance of the common electrode.
    Type: Application
    Filed: March 26, 2012
    Publication date: January 10, 2013
    Inventors: Natsuko FUJIYAMA, Arihiro Takeda
  • Patent number: 8259255
    Abstract: An exemplary backlight module includes a light guide plate (210), a light source (211), and a retardation layer (214). The light guide plate includes a light incident surface (2120) and a light emitting surface (2121) adjacent to the light incident surface. The light source is configured to emit polarized light with a first polarization orientation, and is located at a side of the light incident surface. The retardation layer is disposed at a side of the light emitting surface, and is configured to rotate the first polarization orientation of the polarized light to a second polarization orientation.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: September 4, 2012
    Assignee: Chimei Innolux Corporation
    Inventors: Chuan-Pei Yu, Ming-Chuan Chou
  • Patent number: 8212952
    Abstract: A liquid crystal display panel capable of reducing a capacitance of a parasitic capacitor between a data line and a pixel electrode. The liquid crystal display panel comprises: a thin film transistor at a crossing of a gate line and a data line, liquid crystal cells including a pixel electrode connected to the thin film transistor; first shield patterns in the liquid crystal cells, each shield pattern being parallel to the data line without overlapping the data line, wherein the shield patterns are insulated from and overlap with an outer portion of the pixel electrode; and a common line arrayed to connect the shield patterns for each the liquid crystal cell.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: July 3, 2012
    Assignee: LG Display Co., Ltd.
    Inventors: Hong Sung Song, Sai Chang Yun, Sang Chang Yun, Jae Woo Lee
  • Publication number: 20120086894
    Abstract: A liquid crystal display element comprises a first and a second substrates, a vertical alignment liquid crystal layer, and a first and a second polarizers arranged to cross approximately their absorption axes and an alignment direction of liquid crystal molecules when no voltage is applied at almost 45 degrees. At least one of the electrodes comprises a polyline extending to an extending direction as a whole and having no straight line in parallel to the extending direction along an electrode edge, and the polyline is formed along an edge of at least one of the first and the second electrodes where the alignment directions when a voltage is applied and when no voltage is applied are opposite to each other if the polyline is a straight line along the extending direction.
    Type: Application
    Filed: October 6, 2011
    Publication date: April 12, 2012
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventors: Hiroto FUKUSHIMA, Yoshihisa Iwamoto
  • Publication number: 20120069276
    Abstract: In a liquid crystal display apparatus in which a liquid crystal layer is twist-aligned when no electric field is applied, ?nd value of a liquid crystal layer in a wavelength of 550 nm is 300 to 400 nm, each of directions of polarizing axes of pair of linear polarizers is substantially parallel or vertical to the alignment direction of liquid crystal molecules in each end face of the liquid crystal layer that is closer to each of linear polarizers, and the angle between polarizing axes of the pair of linear polarizers is 85° or larger and smaller than 90°. In a liquid crystal display apparatus in which a liquid crystal layer is aligned to be substantially vertical when no electric field is applied, the angle between polarizing axes of the pair of linear polarizers is 85° or larger and smaller than 90°.
    Type: Application
    Filed: January 24, 2011
    Publication date: March 22, 2012
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Yoshimitsu ISHIKAWA
  • Publication number: 20120033160
    Abstract: In a liquid crystal display device using pixel electrodes having a fishbone structure as well as using the PSA technology, the occurrence of an azimuthal angle shift in the vicinity of the pixel edge is suppressed. A liquid crystal display device according to the present invention is a liquid crystal display device comprising a plurality of pixels and a pair of polarizing plates located in crossed Nicols and providing display in a normally black mode.
    Type: Application
    Filed: March 25, 2010
    Publication date: February 9, 2012
    Inventors: Kunihiro Tashiro, Takayuki Hayano, Shogo Nishiwaki
  • Publication number: 20120013829
    Abstract: A tetragonal ring shape aperture is formed in the common electrode on one substrate and a cross shape aperture is formed at the position corresponding to the center of the tetragonal ring shape aperture in the pixel electrode on the other substrate. A liquid crystal layer between two electrodes are divided to four domains where the directors of the liquid crystal layer have different angles when a voltage is applied to the electrodes. The directors in adjacent domains make a right angle. The tetragonal ring shape aperture is broken at midpoint of each side of the tetragon, and the width of the aperture decreases as goes from the bent point to the edge. Wide viewing angle is obtained by four domains where the directors of the liquid crystal layer indicate different directions, disclination is removed and luminance increases.
    Type: Application
    Filed: September 23, 2011
    Publication date: January 19, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jang-Kun SONG, Kyeong-Hyeon KIM, Kye-Hun LEE, Hea-Ri LEE
  • Patent number: 8094283
    Abstract: A liquid crystal display including a polarizing plate having a linear polarization axis slanted in relation to a scan line, a transparent pixel electrode, an active element which drives the transparent pixel electrode, and a wire for connecting the active element and the transparent pixel electrode. The wire has an end part so shaped as to be slanted in a direction parallel to or perpendicular to the linear polarization axis.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: January 10, 2012
    Assignee: Sony Corporation
    Inventors: Kenji Ogura, Shuichi Tatemori
  • Publication number: 20120002144
    Abstract: A liquid crystal display device includes: a vertical alignment liquid crystal layer; first and second substrates facing each other with the liquid crystal layer interposed; first and second electrodes arranged on the first and second substrates to face the liquid crystal layer; and at least one alignment film in contact with the liquid crystal layer. A pixel region includes a first liquid crystal domain in which liquid crystal molecules are tilted in a first direction around the center of a plane, and approximately at the middle of the thickness, of the liquid crystal layer responsive to a voltage applied. The first liquid crystal domain is close to at least a part of an edge of the first electrode. The part includes a first edge portion in which an azimuthal direction, perpendicular to the part and pointing toward the inside of the first electrode, defines an angle greater than 90 degrees to the first direction.
    Type: Application
    Filed: June 29, 2011
    Publication date: January 5, 2012
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Akihiro Shoraku, Toshihide Tsubata, Koichi Miyachi, Iichiro Inoue, Akihiro Yamamoto, Yoshito Hashimoto, Masumi Kubo, Akihito Jinda
  • Patent number: 7995174
    Abstract: A liquid crystal display includes a first and a second transparent substrates facing to each other, a liquid crystal layer, a first polarizer, a second polarizer, and a first half wave plate. The liquid crystal layer is interposed between the first and the second transparent substrates. The first polarizer is positioned next to the first transparent substrate and opposite the liquid crystal layer, and the second polarizer is positioned next to the second transparent substrate and opposite the liquid crystal layer. The first half wave plate is provided between the first transparent substrate and the first polarizer to enable the liquid crystal display to have a normally black mode.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: August 9, 2011
    Assignee: Wintek Corporation
    Inventors: Yi-Chun Wu, Yu-Cheng Liu, Chun-Chi Chi
  • Patent number: 7956957
    Abstract: An object is to provide a display device with high contrast ratio. Another object is to manufacture such a high-performance display device at low cost. In a display device having a display element interposed between a pair of light-transmitting substrates, a stack of polarizer-including layers in a parallel nicol state is provided outside each of the light-transmitting substrates. Here, transmission axes of polarizers that are stacked in the stack on one side of the display element and transmission axes of polarizers that are stacked in the stack on another side of the display element are arranged to be displaced from a cross nicol state. Also, a retardation film may be provided between the polarizers that are stacked and the substrate.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: June 7, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tetsuji Ishitani, Takeshi Nishi, Yuji Egi
  • Patent number: 7884888
    Abstract: 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: Grant
    Filed: December 4, 2008
    Date of Patent: February 8, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Kristina M. Magnusson, Kenneth Jarefors, Per-Olav Dahlin
  • Patent number: 7820071
    Abstract: A light modulating material comprising at least one kind of dichroic dye having a substituent represented by the following Formula (1) and at least one kind of host liquid crystal between a pair of electrodes, and changing the transmittance of incident light. In the formula (1), Het is oxygen atom or sulfur atom; B1 and B2 each independently represent an arylene group, a heteroarylene group or a bivalent cyclic aliphatic hydrocarbon group; Q1 represents a bivalent linking group; C1 represents an alkyl group, a cycloalkyl group, an alkoxy group, an alkoxycarbonyl group, an acyl group, or an acyloxy group; j represents 0 or 1; p, q and r each independently represent an integer from 0 to 5; n represents an integer from 1 to 3; (p+r)×n is an integer from 3 to 10.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: October 26, 2010
    Assignee: Fujifilm Corporation
    Inventors: Takashi Kato, Koji Takaku, Naoyuki Hayashi, Akihide Osaku
  • Publication number: 20100253887
    Abstract: A liquid crystal display device according to the present invention includes a rear light source device, a rear polarizing plate, a liquid crystal cell including liquid crystal molecules that are substantially perpendicularly aligned during black display, and a front polarizing plate, which are provided in the stated order, wherein: an absorption axis of a polarizer of the rear polarizing plate is perpendicular to an absorption axis of a polarizer of the front polarizing plate; and condensed light in which a half-value angle in a direction perpendicular to the absorption axis of the polarizer of the rear polarizing plate is smaller than a half-value angle in a direction parallel to the absorption axis of the polarizer of the rear polarizing plate enters the rear polarizing plate.
    Type: Application
    Filed: April 5, 2010
    Publication date: October 7, 2010
    Applicant: NITTO DENKO CORPORATION
    Inventors: Hiroyuki Takemoto, Minoru Miyatake
  • Patent number: 7804559
    Abstract: A display device with a higher contrast ratio is provided. The display device is provided with stacked polarizing plates arranged displaced from a parallel nicol state. Moreover, in the display device, at least one of a pair of stacked polarizing plates is displaced from a parallel state. The pair of stacked polarizing plates is arranged in a cross nicol state. A retardation plate may be provided between the polarizing plate and the substrate. As a result, the contrast ratio can be increased.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: September 28, 2010
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yuji Egi, Tetsuji Ishitani, Takeshi Nishi
  • Publication number: 20100231833
    Abstract: A liquid crystal display apparatus including a pair of substrates having electrodes and vertical alignment layers. A liquid crystal having a negative anisotropy of dielectric is inserted between the substrates. Each substrate has linearly arranged alignment control structures for controlling the alignment of the liquid crystal. The alignment control structures are formed in the form of projections or slits. Each alignment control structure is formed of a plurality of constituent units. In addition, means for forming a boundary of alignment of liquid crystal (singular point in director field) to control the liquid crystal located on the alignment control structures.
    Type: Application
    Filed: May 19, 2010
    Publication date: September 16, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Takahiro Sasaki, Arihiro Takeda, Katsufumi Ohmuro, Hideo Chida, Yoshio Koike, Kimiaki Nakamura, Kunihiro Tashiro
  • Patent number: 7705937
    Abstract: An IPS-mode transflective LCD device includes an array of pixels each including a reflective region and a transmissive region juxtaposed. The reflective region operates in a normally-white mode, and the transmissive region operates in a normally-black mode. A common data signal is supplied to the reflective region and transmissive region, whereas the common electrode signal in the transmissive region is an inverted signal of the common electrode signal in the reflective region, to thereby obtain similar gray-scale levels.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: April 27, 2010
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Michiaki Sakamoto, Jin Matsushima, Hiroshi Nagai, Kenichi Mori, Hidenori Ikeno, Yasuki Kudo, Ken Sumiyoshi
  • Publication number: 20100079709
    Abstract: The present invention relates to a liquid crystal display. The liquid crystal display includes a liquid crystal panel having a first and a second side, a first polarizer arranged on the first side of the liquid crystal panel, and a backlight unit arranged on the first side of the liquid crystal panel, the first polarizer being arranged between the liquid crystal panel and the backlight unit, a second polarizer arranged on the second side of the liquid crystal panel, and a first half-wave plate arranged on the second side of the liquid crystal panel, the second polarizer arranged between the liquid crystal panel and the first half-wave plate. A slow axis of the first half-wave plate meets a transmission axis of the second polarizer at a first angle ?1 so that the first half-wave plate rotates the polarization axis of polarized light transmitted from the second polarizer.
    Type: Application
    Filed: July 6, 2009
    Publication date: April 1, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Won-Sang Park, Dong-Hwan Kim, Ahn-Ho Jee, Chang-Kil Lee, Chang-Wook Kang
  • Patent number: 7688403
    Abstract: A circularly polarizing plate includes a ?/4 phase difference plate and a linearly polarizing plate overlaid on a main surface of the ?/4 phase difference plate and having an absorption axis forming an angle of about 45° with respect to a lagging axis of the ?/4 phase difference plate. The ?/4 phase difference plate has reverse wavelength dispersion characteristics and an Nz coefficient of 1.6 or more. Employment of this structure can provide the circularly polarizing plate having good view angle characteristics and a vertical alignment type of liquid crystal display panel having the same.
    Type: Grant
    Filed: October 20, 2004
    Date of Patent: March 30, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Naru Usukura, Manabu Abiru, Takayuki Natsume, Koji Yamabuchi, Makoto Nakahara
  • Patent number: 7646453
    Abstract: A reflective polarizer contains: (a) a light-entrance medium having a light-entrance surface and a microstructured surface with a series of prismatic structures, wherein first and second sidewalls of each prismatic structure have an inclination angle of more than 53 degrees with respect to the light-entrance surface; (b) a polarization-selective thin film optical coating on the series of prismatic structures, for transmitting a first polarization of light and reflecting a second polarization; and (c) a light-exit medium on the polarization-selective thin film optical coating that provides a smooth light-exit surface.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: January 12, 2010
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventors: Marek W. Kowarz, Jehuda Greener, Charles C. Anderson
  • Patent number: 7619706
    Abstract: A liquid crystal panel including a liquid crystal cell having an improved contrast ratio in an oblique direction and an improved color shift in an oblique direction is provided. A liquid crystal panel according to the present invention includes: a liquid crystal cell; a first polarizer arranged on one side of the liquid crystal cell; a second polarizer arranged on another side of the liquid crystal cell; a negative C plate and a negative A plate arranged between the liquid crystal cell and the first polarizer; and an isotropic optical element arranged between the liquid crystal cell and the second polarizer. The negative C plate is arranged between the first polarizer and the negative A plate.
    Type: Grant
    Filed: February 6, 2006
    Date of Patent: November 17, 2009
    Assignee: Nitto Denko Corporation
    Inventors: Shuuji Yano, Kenji Yoda, Kentarou Kobayashi, Kanako Itou
  • Patent number: 7593069
    Abstract: Disclosed is an LCD comprising a plurality of data lines extending in a first direction, a plurality of gate lines extending in a second direction defining with the plurality of data lines a plurality of pixel areas arranged in a matrix configuration and supplying a gate signal to at least two rows of the pixel areas simultaneously. Thin film transistors are connected to the plurality of gate lines and the plurality of data lines. Also disclosed is a driving method for an LCD including a thin film transistor substrate including pixel areas arranged in a matrix form with a gate line extending in a first direction and a data line extending in a second direction, along with a backlight providing the TFT substrate with light of three primary colors. In the method, the three primary colors are sequentially provided in one frame period and at least two rows of pixel areas and simultaneously provided with a common gate signal.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: September 22, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joon-hak Oh, Cheol-woo Park, Chong-chul Chai
  • Patent number: 7576820
    Abstract: A liquid crystal display apparatus, provided with liquid crystal compensation plates and ?/4 plates on both sides of a liquid crystal cell, in a sequence that the liquid crystal compensation plates, then the ?/4 plates. Further provided is Rth compensation film between the ?/4 plate and linear polarization film. Set substantially at zero is a retardation Rth1 in a perpendicular direction in a range from the linear polarization films to the ?/4 plates, excluding the ?/4 plates. This gives a retardation (in a perpendicular direction) for optically compensating the liquid crystal cell a closer position to the liquid crystal cell. As a result, a broad angle of visibility can be maintained, without losing a balance between viewing angle characteristics from the above position (or the bottom position) and those from the right position (or the left position), while it is possible to prevent contrast ratio in a front direction from being lowered. Therefore, an LCD having good display quality can be realized.
    Type: Grant
    Filed: June 2, 2005
    Date of Patent: August 18, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koichi Miyachi, Motohiro Yamahara
  • Publication number: 20090128751
    Abstract: A liquid crystal display includes a first and a second transparent substrates facing to each other, a liquid crystal layer, a first polarizer, a second polarizer, and a first half wave plate. The liquid crystal layer is interposed between the first and the second transparent substrates. The first polarizer is positioned next to the first transparent substrate and opposite the liquid crystal layer, and the second polarizer is positioned next to the second transparent substrate and opposite the liquid crystal layer. The first half wave plate is provided between the first transparent substrate and the first polarizer to enable the liquid crystal display to have a normally black mode.
    Type: Application
    Filed: November 18, 2008
    Publication date: May 21, 2009
    Inventors: Yi-Chun WU, Yu-Cheng Liu, Chun-Chi Chi
  • Patent number: 7532265
    Abstract: An integrated circuit with the cell test function for the electrostatic discharge (ESD) protection, wherein each ESD unit protection circuit has a first, second, and third thin film transistors (TFTs) composed and connected to a signal line, a fourth TFT's and a fifth TFT's gate and drain electrodes are also shorted at the common electrode and the source electrode of the third TFT connects to the common electrode. A sixth TFT's drain electrode connects to the source electrode of the fourth TFT and the source electrode of the fifth TFT connects to the gate electrode of the sixth TFT. By the gate and drain electrodes of the sixth TFT connecting to the corresponding test-switch pads respectively, the sixth TFT is used as a TFT switch so as to build the cell test function in the ESD unit protection circuit.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: May 12, 2009
    Assignee: Wintek Corporation
    Inventors: Ja-Fu Tsai, Wen-Chun Wang
  • Publication number: 20090096965
    Abstract: Disclosed is a liquid display device that is capable of suppressing a change in contrast of a liquid crystal display panel, in which a screen is a curved surface with a curvature in one direction. In a liquid crystal display panel having a cylindrical surface, an upper polarizing plate is attached to a color filter substrate. The upper polarizing plate receives tensile stress in a curved direction. Tensile stress adversely affects polarization characteristics of the upper polarizing plate. According to an embodiment of the invention, if the absorption axis A of the upper polarizing plate is adapted to match with the curved direction of the liquid crystal display panel, it is possible to prevent a change in polarization characteristics of the upper polarizing plate. As a result, it is possible to obtain an image with excellent contrast for a long term.
    Type: Application
    Filed: October 9, 2008
    Publication date: April 16, 2009
    Inventor: Tetsuya Nagata
  • Patent number: 7515232
    Abstract: This invention relates to a transflective liquid crystal display device (11, 21), comprising a plurality of pixels, each comprising a liquid crystal layer (12, 22), being sandwiched between front and back electrode means (13, 23; 14, 24) as well as front and back polarizer means (17a, 27a; 17b, 27b). Said display device is characterized in that an optical ?/4 layer (16a, 26a) at least partly is arranged between said front polarizer (17a, 27a) and said liquid crystal layer (12, 22), and said liquid crystal layer (12, 22) is a liquid crystal layer having a twist angle essentially within a range ±80-100°, such as 90°. The invention further relates to methods for generating a quarterwave foil for use in a liquid crystal display as defined above.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: April 7, 2009
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Sander Jurgen Roosendaal, Johannes Albertus Matthijs Maria Van Haaren
  • Publication number: 20090086132
    Abstract: 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: Application
    Filed: September 25, 2008
    Publication date: April 2, 2009
    Applicant: Stanley Electric Co., Ltd.
    Inventors: Masatoshi Horii, Takashi Sugiyama, Yoshihisa Iwamoto, Keiichi Hirata
  • Patent number: 7477330
    Abstract: 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: Grant
    Filed: March 9, 2005
    Date of Patent: January 13, 2009
    Assignee: 3M Innovative Properties Company
    Inventors: Kristina M. Magnusson, Kenneth Jarefors, Per-Olav Dahlin