Conductive Mask Patents (Class 349/111)
  • Patent number: 6891580
    Abstract: A backlight assembly of a liquid crystal display (LCD) device is disclosed, in which each edge of the diffusion and prism sheets is extended to upper surfaces of the metal reflecting plate and the mold frame, so that it is possible to prevent light emitted from a lamp from leaking into a liquid crystal panel without passing through one of the diffusion and prism sheet.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: May 10, 2005
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Myong Gi Jang, Se Chang Won, Dong Jae You
  • Patent number: 6888587
    Abstract: A method of forming an active plate for a liquid crystal display using top gate TFTs is described. A black organic light shield layer (73) is used under the TFTs to shield the channel (91) of the TFTs from light passing through a substrate (71) from below. The active plate may be a high aperture plate having pixel electrodes (99) overlapping the row and column (79) conductors. The organic light shield layer may mask the gaps (102) between pixel electrodes.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: May 3, 2005
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Steven C. Deane
  • Patent number: 6885417
    Abstract: A pixel electrode and a thin film transistor connected to the electrode are provided above one substrate. A shading film is provided above another substrate. The shading film has an overhanging portion defining a corner cutting in an opening area of each pixel in the crossing area where the data line and the scan line cross with each other. A channel region of the thin film transistor is arranged in the crossing areas. Thus, light resistance is enhanced and a high-grade image is displayed in an electro-optical apparatus.
    Type: Grant
    Filed: May 12, 2003
    Date of Patent: April 26, 2005
    Assignee: Seiko Epson Corporation
    Inventor: Masao Murade
  • Patent number: 6885416
    Abstract: A flat panel display with a non-matrix shielding structure. The non-matrix shielding structure comprises a main shielding structure which has gaps and main spacings substantially corresponding to the pixel regions, and complementary shielding structures corresponding to the gaps. Each gap substantially corresponds to the scan line or signal line. Each main spacing is connected to at least one of the gaps, and each gap is connected to two adjacent main spacings.
    Type: Grant
    Filed: July 7, 2003
    Date of Patent: April 26, 2005
    Assignee: AU Optronics Corp.
    Inventors: Fang-Chen Luo, Kuen-Wen Hu
  • Patent number: 6879358
    Abstract: A liquid crystal light valve includes a semiconductor substrate having a region for a plurality of switching elements formed in a matrix form. A first metal layer is formed on the surface of the semiconductor substrate through an insulating layer and divided into a plurality of parts by first slits. A second metal layer is formed on the first metal layer through another insulating layer and divided into a plurality of parts by second slits. A third metal layer is formed on the second metal layer through still another insulating layer and divided into a plurality of parts by third slits. An opposite substrate has an opposite electrode on a surface thereof, disposed so as to be opposite to said third metal layer through an interval on the opposite electrode side. Liquid crystal fills the interval between said opposite electrode and the third metal layer.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: April 12, 2005
    Assignees: Hitachi, Ltd., Hitachi Process Computer Engineering, Inc.
    Inventors: Hideo Sato, Minoru Hoshino, Yuji Mori, Shinichi Komura, Yoshiharu Nagae, Ichirou Katsuyama, Tetsuya Nagata, Akira Arimoto, Akio Hayasaka
  • Patent number: 6867752
    Abstract: To provide a portable information processing system with which downsizing and increase in display capacity may be realized. The portable information processing system according to the present invention displays, on an HMD (head mount display) worn by a user on his or her head, an image displayed on a display portion of a portable information terminal. The system employs wireless information transmitting/receiving means such as infrared-ray data communication or data communication by radio wave to transmit and receive information between the portable information terminal and the HMD.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: March 15, 2005
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Jun Koyama, Keisuke Hayashi
  • Patent number: 6856362
    Abstract: A liquid crystal display device includes a liquid crystal display panel and a metal shield casing which covers a periphery of the liquid crystal display panel. The metal shield casing has a plurality of fixing pawls and a plurality of fixing hooks.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: February 15, 2005
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Masumi Sasuga, Junichi Ohwada, Akira Kobayashi, Masaru Fujita, Hiroshi Nakamoto, Ryu Ono, Tsutomu Isono
  • Patent number: 6853408
    Abstract: A CF on TFT type liquid crystal display and a method of manufacturing the same. The liquid crystal display has a plurality of parallel scanning lines, a plurality of parallel data lines which cross the scanning lines, thin film transistors each disposed in the proximity of an intersection between one of the scanning lines and one of the data lines, and pixel electrodes disposed in a matrix and each coupled with one of the thin film transistors. The light shield film is formed over areas including at least the thin film transistors but except over portions which become banks and hinder flow of developer for patterning the light shield film. As an embodiment, the light shield film can be formed along the data lines, and also partially along the scanning lines except a part of each portion of the scanning lines between adjacent data lines.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: February 8, 2005
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Mamoru Okamoto, Michiaki Sakamoto, Masanobu Hidehira
  • Patent number: 6839104
    Abstract: A common electrode substrate has a transparent insulating substrate to be arranged opposite to an array substrate having pixel electrodes formed in respective pixel regions that are defined by a plurality of gate bus lines and drain bus lines. The substrate holds a liquid crystal having negative dielectric anisotropy. A common electrode is formed on the transparent insulating substrate; alignment regulating structures having linear protrusions are formed on the common electrode; and a light shield film is formed on the transparent insulating substrate with overlap regions that overlap the pixel electrodes when viewed in the direction perpendicular to a surface of the transparent insulating substrate, so as to shield, from light, alignment defective regions of the liquid crystal formed in regions of end portions of the pixel electrodes.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: January 4, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Yoji Taniguchi, Hiroyasu Inoue
  • Patent number: 6839105
    Abstract: Reflective display and transmissive display are performed by driving liquid crystal in a predetermined area (region b) in a non-crossing region by using an oblique electric field. Light passed through the region b when a voltage is applied is shaded since the liquid crystal in the region b is driven. Accordingly, at a position of a second substrate 2b corresponding to the region b, it is not necessary to provide a shading film 22. Consequently, a line width S1 of the shading film 22 can be designed to be smaller compared to that of a conventional one, and hence, a high aperture ratio can be obtained.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: January 4, 2005
    Assignee: Seiko Epson Corporation
    Inventors: Chihiro Tanaka, Tadashi Tsuyuki
  • Patent number: 6831709
    Abstract: A liquid crystal display panel is arranged such that a reflection member overlaps a light-shielding wiring pattern such that apertures are left unmasked. This prevents light use efficiency from being decreased due to a light-shielding wiring pattern having memory wiring layers. An array substrate includes a transparent electrode which applies a field to a liquid crystal layer, a light-shielding wiring pattern having one or more apertures which allow transmission of light incident on the liquid crystal layer from the reverse side of the array substrate, and a reflection member which reflects incident light applied from a counter substrate side through the liquid crystal layer.
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: December 14, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshitaka Yamada, Yasuyuki Hanazawa
  • Patent number: 6825891
    Abstract: The present invention provides electro-optical device that can include, on a TFT array substrate, pixel electrodes, TFTs for switching the respective pixel electrodes, and scanning lines and data lines respectively connected to the TFTs. By laminating a capacitive electrode and a capacitive line with an interlayer insulator interposed therebetween, a storage capacitor can be formed in a region overlapping the scanning line in a plan view. This arrangement increases a pixel aperture ratio and the capacitance of the storage capacitor, thereby reducing cross-talk and ghost and presenting a high-quality image display.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: November 30, 2004
    Assignee: Seiko Epson Corporation
    Inventor: Hisaki Kurashina
  • Patent number: 6822708
    Abstract: In a liquid crystal display device having a reflection electrode of a reflection diffuser panel shape formed with surface roughness, a liquid crystal orientation film for realizing a predetermined pre-tilt angle is formed on the reflection electrode by an optical orientation, technique.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: November 23, 2004
    Assignee: Sony Corporation
    Inventor: Masahiro Fujino
  • Patent number: 6809338
    Abstract: An electro-optical device includes a TFT, a data line, a scanning line, and a pixel electrode, which are provided above a substrate, a semiconductor layer which constitutes the TFT being connected to the pixel electrode through a relay film. A light-shielding conductive film provided between the data line and the relay film is electrically connected to a capacitor electrode which consists of the same film as the scanning line provided between the relay film and the semiconductor layer at a constant potential, thereby forming a storage capacitor between the films. Therefore, in an electro-optical device of a type in which a light-shielding film against incident light is provided above pixel switching TFT, and a light-shielding film against return light is provided below the TFT, the pixel aperture ratio can be increased, and the storage capacitor can be enlarged.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: October 26, 2004
    Assignee: Seiko Epson Corporation
    Inventor: Masao Murade
  • Publication number: 20040196417
    Abstract: To achieve clear image display without providing a feeling of roughness by fixing the position where disclination is generated in a liquid crystal device of a homeotropic alignment type, a conductive light shielding film provided on the side of an opposed substrate as a common electrode to drive a liquid crystal layer by pixel electrodes of an array substrate and the light shielding film of the opposed substrate.
    Type: Application
    Filed: March 2, 2004
    Publication date: October 7, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tsuyoshi Okazaki, Kinya Ozawa, Tsuyoshi Maeda
  • Patent number: 6795143
    Abstract: The object of the invention is to provide an active matrix liquid crystal display device having improved brightness and higher contrast, and the method for manufacturing the same. An active matrix liquid crystal display device has on the upper side and the lower side of the switching element, arranged in matrix, a lower shading layer and an upper shading layer. Either the lower shading layer or the upper shading layer is, or both the lower and upper shading layers are, formed to have a convex shape and a sloped portion protruding toward the switching element.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: September 21, 2004
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yasumori Fukushima
  • Patent number: 6795141
    Abstract: A color filter substrate for an LCD device comprises a transparent substrate having a substantially flat surface, a black matrix, a plurality of color filters, an electrode, a plurality of spacers, and an alignment film. The black matrix is formed on predetermined regions of the substrate. The plurality of color filters are formed between the regions of the black matrix with overlapping portions on the edge. The electrode is formed over the black matrix and the color filters. The plurality of spacers are formed on the regions of the black matrix without overlapping with the color filters, and the alignment film for aligning the liquid crystal molecular is formed over the black matrix, the color filters, the electrode, and the spacers.
    Type: Grant
    Filed: January 7, 2002
    Date of Patent: September 21, 2004
    Assignee: Chi Mei Optoelectronics
    Inventor: Tsutomu Yamada
  • Patent number: 6791630
    Abstract: Active matrix display devices having improved opening and contrast ratios utilize light blocking lines to improve display contrast ratios yet position the light blocking lines on the same level of metallization as the gate lines to thereby limit parasitic capacitive coupling between the data lines and the pixel electrodes. The light blocking lines are also positioned on only one side of the data lines so that improvements in the display's opening ratio can also be achieved. The light blocking lines are preferably patterned so that no overlap occurs between a display's data lines and the light blocking lines. The elimination of overlap reduces the step height in the display's pixel electrodes and thereby reduces the extent of disclination of the liquid crystal molecules in the liquid crystal material extending opposite the pixel electrodes.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: September 14, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Dong-Gyu Kim
  • Patent number: 6781651
    Abstract: In a method of fabricating a thin film transistor array substrate, a black matrix having separated portions is first formed on a substrate with an opaque conductive material. An insulation layer is formed to cover the black matrix. A gate line assembly and a data line assembly are formed over the black matrix and insulation layer. Buffer layers are formed to cover the gaps between the separate portions of the black matrix. The buffer conductive layers are formed at the same plane as the gate line assembly or data line assembly.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: August 24, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jang-Kun Song, Yong-Woo Choi
  • Publication number: 20040150770
    Abstract: The invention relates to a liquid crystal display device (1) with a negative display when no current is supplied. Said device comprises a liquid crystal layer that is built into an active zone (2) between substrates, the exterior of each of said substrates being covered by pole filters that are aligned in an arrangement for the currentless negative display. The interior of said substrates is provided with segments (2.2) of surface electrodes that are separated from one another by means of electrically insulating dividing lines (5), said segments being connected to connection lines that lead to the exterior. Masking is provided on the interior of the substrate for areas that would otherwise remain bright during retrace blanking.
    Type: Application
    Filed: April 5, 2004
    Publication date: August 5, 2004
    Inventor: Wolfram Wiemer
  • Patent number: 6768535
    Abstract: In a TFT array substrate 10 of an electrooptical device, a scanning line 3a, a drain electrode 11, a first light shield layer 13, and a data line 3a are laminated over a channel region 1a′ of a TFT 30 and a second light shield layer 14 is laminated beneath the channel region 1a′. A side wall formation trench 16 is formed beside the channel region 1a′ of the TFT 30, and in the side wall formation trench a conductive layer having a light shield property is concurrently formed with the first light shield layer 13 thereby a light shield side wall 131 is formed. By three-dimensionally blocking light's entry towards the channel region 1a′, obliquely or laterally incident light is prevented from entering the channel region of a pixel switching TFT, and the TFT 30 is free from erratic operations and reliability degradation.
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: July 27, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Masahiro Yasukawa, Yasushi Yamazaki
  • Patent number: 6768522
    Abstract: In a TFT array substrate 10 of an electrooptical device, a scanning line 3a, a drain electrode 11, a first light shield layer 13, and a data line 3a are laminated over a channel region 1a′ of a TFT 30 and a second light shield layer 14 is laminated beneath the channel region 1a′. A side wall formation trench 16 is formed beside the channel region 1a′ of the TFT 30, and in the side wall formation trench a conductive layer having a light shield property is concurrently formed with the first light shield layer 13 thereby a light shield side wall 131 is formed. By three-dimensionally blocking light's entry towards the channel region 1a′, obliquely or laterally incident light is prevented from entering the channel region of a pixel switching TFT, and the TFT 30 is free from erratic operations and reliability degradation.
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: July 27, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Masahiro Yasukawa, Yasushi Yamazaki
  • Patent number: 6765639
    Abstract: The invention provides a liquid crystal display device that can reliably prevent light leakage in between dot display domains at boundaries to prevent decrease in contrast and to suppress color mixing. The invention can include semitransmissive reflective layer having a cholesteric liquid crystal layer is arranged in dot display domains, and a metal reflective layer is arranged in a BM domain separating the dot display domains. The metal reflective layer can alter the rotational direction of reflected circularly polarized light from that before reflection and the device can create high-contrast liquid crystal display.
    Type: Grant
    Filed: January 10, 2003
    Date of Patent: July 20, 2004
    Assignee: Seiko Epson Corporation
    Inventor: Tsuyoshi Maeda
  • Patent number: 6765546
    Abstract: In a vehicle display device having displays fitted in a grained panel of an instrument panel of a vehicle and serving to emit a display light to an outside during lighting, a front face of each of the displays is covered with a screen having a grained pattern which is provided with a large number of minute holes capable of transmitting the display light. Consequently, a screen can be seen through the minute holes of the screen when the display is turned on, while the display is hidden by the grained screen when the display is turned off. Therefore, the whole portion including the part having the display fitted therein is unified to be grained.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: July 20, 2004
    Assignee: Yazaki Corporation
    Inventors: Hatsushi Akamine, Yoshiyuki Iwamoto, Yasuhiro Nagasaka
  • Patent number: 6760089
    Abstract: In an LCD, according to an embodiment of the present invention, a projection 6 is structured on top of insulation layer 8 on a TFT glass substrate 10 and under part of a back matrix 9. The projection 6 encircles the transparent region in each pixel so that a spacer 17 cannot climb over the projection 6 and enter the transparent region even though a certain pressure is applied onto the substrates 10 and 11. The width of the projection 6 is equal to or less than the diameter of the spacer 17. The height of the projection 6 is equal to or longer than approximately 1% the length of the diameter of the spacer 17, and it is preferable that it be equal to or longer than approximately 2%.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: July 6, 2004
    Assignee: NEC LCD Technologies Ltd.
    Inventor: Shoichi Kuroha
  • Patent number: 6750929
    Abstract: A liquid crystal display device includes a pair of substrates, a liquid crystal layer sealed between main surfaces of the substrates, a sealing member formed on peripheral portions of opposing main surfaces of a pair of these substrates to fixedly secure the pair of substrates to each other and surround the liquid crystal layer, and a light shielding film formed on one of the peripheral portions of the pair of substrates opposite to the liquid crystal layer without manual application. A region on which the light shielding film is formed is overlapped on a region of the main surface of one of the pair of substrates on which the seal member is formed in a back-to-back relationship, and light shielding film is formed of polyester-based resin to which a black pigment is added.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: June 15, 2004
    Assignees: Hitachi, Ltd., Hitachi Electronic Devices Co., Ltd.
    Inventors: Yoshikuni Nagashima, Takanori Yano
  • Patent number: 6744484
    Abstract: A liquid crystal apparatus with leak current preventing function includes first and second transparent substrates provided opposite to each other; first and second drive electrodes for an image, each formed on an opposite inner surface of the first and second transparent substrates; a sealing member (56) provided between the first and second transparent substrates for providing a liquid crystal injecting area and forming a gap in order to seal the liquid crystal therebetween; a plurality of conductive particles included dispersedly within the sealing member (56); a non-pixel electrode formed on position covered by the sealing member between the first and second transparent substrates; a dummy electrode (40D) formed opposite to the non-pixel electrode at the position in which the first and second transparent substrates are covered by the sealing member; and a conductive light-cutting film provided to at least one of inner surface of the first and second transparent substrates for cutting off unnecessary light
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: June 1, 2004
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Takeru Yoshino, Terutaka Okano
  • Publication number: 20040085497
    Abstract: An electro-optical apparatus is provided with a pixel electrode, a TFT connected thereto, and a scanning line and a data line connected thereto above a TFT array substrate. Furthermore, a junction layer, which performs the function of a pixel-potential-side capacitor electrode of a storage capacitor, and a capacitor line including a fixed-potential-side capacitor electrode arranged to face this with a dielectric film therebetween, are provided. A multilayer junction-layer connecting the junction layer and the pixel electrode is provided from the same multilayer film as the data line, while covering a notch portion of the capacitor line. The upper film of this multilayer film is made of a material unlikely to be subject to electrolytic corrosion by ITO of the pixel electrode compared with that in the lower film.
    Type: Application
    Filed: July 9, 2003
    Publication date: May 6, 2004
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Hidenori Kawata
  • Publication number: 20040080688
    Abstract: To provide highly reliable wiring and connection terminals of an electro-optic device used as a transflective liquid crystal device or the like. Since sidewalls and a part of an upper surface of a data line 6a are covered with a reflection film 44, a central layer 62 is not etched by an etchant when the reflection film 44 is formed by patterning. In addition, since a transparent conductive film 45 is connected to an upper layer 63 of the data line 6a via a contact hole 44a, the resistance of a connection terminal 90 can be decreased, and superior conduction can be obtained.
    Type: Application
    Filed: September 2, 2003
    Publication date: April 29, 2004
    Applicant: Seiko Epson Corporation
    Inventor: Yukimasa Ishida
  • Patent number: 6724535
    Abstract: An optical device such as an overlay panel for a LCD display, comprises an element of light-transmitting material having a surface configured to form a stepped Fresnel prismatic structure. The light-transmitting material itself or ribbed light refracting element, said element incorporates an array of graded refractive index features adapted to impart light dispersing of diffusing characteristics to the light-transmitting material. In an alternative arrangement, the element of light-transmitting material has a layer configured to form a stepped Fresnel-type surface and an additional layer incorporating such an array of graded refractive index features.
    Type: Grant
    Filed: October 14, 2001
    Date of Patent: April 20, 2004
    Assignee: Microsharp Corporation Limited
    Inventor: Robin Clabburn
  • Publication number: 20040066474
    Abstract: A liquid crystal display apparatus includes a first substrate, a second substrate opposed to the first substrate, liquid crystals disposed between the first and second substrates, and a DC power supply. The first substrate has a plurality of scanning lines; a plurality of signal lines, the scanning lines and the signal lines being arranged in a matrix; display electrodes provided in the areas partitioned by the scanning lines and the signal lines; thin film transistors (TFTs) provided in the areas partitioned by the scanning lines and the signal lines and connected to the display electrodes; shield electrodes covering the respective scanning lines at least partly; and an insulating film disposed between the shield electrodes and the scanning lines. The shield electrodes are electrically connected to the DC power supply.
    Type: Application
    Filed: April 22, 2003
    Publication date: April 8, 2004
    Applicant: ALPS ELECTRIC CO., LTD.
    Inventors: Akira Nakano, Ken Kawahata
  • Patent number: 6690033
    Abstract: There is provided an electronic device in which the deterioration of the device is prevented and an aperture ratio is improved without using a black mask and without increasing the number of masks. In the electronic device, a first electrode (113) is disposed on another layer different from the layer on which a gate wiring (145) is disposed as a gate electrode, and a semiconductor layer of a pixel switching TFT is superimposed on the gate wiring (145) so as to be shielded from a light. Thus, the deterioration of the TFT is suppressed, and a high aperture ratio is realized.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: February 10, 2004
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Jun Koyama, Kazutaka Inukai
  • Patent number: 6678025
    Abstract: The present invention provides a liquid crystal display device which is capable of suppressing occurrence of an electric field between a metal light shielding layer and a metal interconnecting layer in a peripheral circuit portion, and preventing disconnection of the metal interconnecting layer due to corrosion, and which has improved reliability under conditions where light and heat are present. In the liquid crystal display device, a metal light shielding layer is formed in a pattern reverse to a metal interconnecting layer 13 on the metal-interconnecting layer on the driving substrate side. The potential of the metal light shielding layer is set to the same potential as the potential Vss of the metal interconnecting layer. On the metal light shielding layer is provided a transparent electrode through a flattening film. The transparent electrode is set to the same potential (=the potential of auxiliary capacitor or capacitance Cs) as a counter electrode on the counter substrate side.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: January 13, 2004
    Assignee: Sony Corporation
    Inventors: Masayuki Iida, Satofumi Koike
  • Patent number: 6677613
    Abstract: There is provided an active matrix type display device in which the display device is formed of a driver circuit with an insulated gate FET capable of operating at high speed, and even if an area of a pixel electrode per unit pixel is made small, sufficient storage capacitance can be obtained. In a semiconductor device comprising an active matrix circuit with an insulated gate field effect transistor having at least an active layer made of single crystalline semiconductor, an organic resin insulating layer is formed over the insulated gate field effect transistor, a storage capacitance is formed of a light shielding layer formed over the organic resin insulating layer, a dielectric layer formed to be in close contact with the light shielding layer, and a light reflecting electrode connected to the insulated gate field effect transistor.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: January 13, 2004
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Satoshi Murakami, Yasuyuki Arai
  • Publication number: 20030234899
    Abstract: An electro-optical device includes a TFT array substrate, pixel electrodes, thin film transistors electrically connected to the pixel electrodes, scanning lines and data lines connected thereto, and a nitride film disposed at least on surfaces of the data lines provided above the TFT array substrate.
    Type: Application
    Filed: May 2, 2003
    Publication date: December 25, 2003
    Applicant: Seiko Epson Corporation
    Inventor: Hidenori Kawata
  • Patent number: 6667785
    Abstract: A display sheet having polymer dispersed liquid crystals including a substrate; a state changing layer disposed over the substrate and defining first and second surfaces, such state changing layer having the polymer dispersed liquid crystals having first and second optical states, which can change state; and a first transparent conductor disposed on the first surface of the state changing layer. The display sheet also includes a second conductor on the second surface of the state changing layer and has a composite structure of at least two layers of different materials wherein the composite structure absorbs light and is electrically conductive so that when a field is applied between the first and second conductors, the liquid crystals change state.
    Type: Grant
    Filed: January 17, 2001
    Date of Patent: December 23, 2003
    Assignee: Eastman Kodak Company
    Inventor: Stanley W. Stephenson
  • Patent number: 6665024
    Abstract: The present invention provides electro-optical device that can include, on a TFT array substrate, pixel electrodes, TFTs for switching the respective pixel electrodes, and scanning lines and data lines respectively connected to the TFTs. By laminating a capacitive electrode and a capacitive line with an interlayer insulator interposed therebetween, a storage capacitor can be formed in a region overlapping the scanning line in a plan view. This arrangement increases a pixel aperture ratio and the capacitance of the storage capacitor, thereby reducing cross-talk and ghost and presenting a high-quality image display.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: December 16, 2003
    Assignee: Seiko Epson Corporation
    Inventor: Hisaki Kurashina
  • Patent number: 6657608
    Abstract: A liquid crystal device has a structure in which an electric field is applied across a liquid crystal in a direction substantially parallel to the plane of a substrate. A conductive film is formed on a first substrate on which an electric field control is provided, and also on a color filter substrate located opposite the first substrate, and the conductive films are maintained at either a ground voltage, a common electrode voltage, the center voltage of an image signal, a non-selection voltage of a scanning signal, or a logic voltage of an external driver or otherwise the voltage of the conductive films is maintained in a floating state. The liquid crystal device having the above structure displays a high-quality image without encountering an influence of electrostatic charges.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: December 2, 2003
    Assignee: Seiko Epson Corporation
    Inventor: Tsuyoshi Maeda
  • Patent number: 6654092
    Abstract: An active-matrix type liquid crystal display device having transparent substrates, a liquid crystal layer, pixel areas arranged on the surfaces of the transparent substrates on the liquid crystal side, and display electrodes, reference electrodes, scan lines, video signal lines, reference signal lines and active devices arranged in the pixel areas. A voltage is applied between the display electrodes and the reference electrodes to produce an electric field parallel to the transparent substrates in the liquid crystal layer, and on one of the transparent substrates the reference electrodes are arranged on both sides of the video signal lines, and on the other transparent substrate a shield electrode which is an electrically connected conductive member is formed to cover, as seen in plan view, the video signal lines in the pixel areas and a part of the reference electrodes on both sides of the video signal lines.
    Type: Grant
    Filed: July 16, 2001
    Date of Patent: November 25, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhiko Yanagawa, Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi
  • Patent number: 6650389
    Abstract: In a liquid crystal display (LCD device), according to the present invention, multiple common electrodes (5) are formed above the TFTs substrate, so as to overlap the respective data bus lines (2), which belong to the same column of the TFTs matrix. Whereas multiple common bus lines (3) are formed, so as to overlap both the respective gate bus lines (7, 1), which belong to the same line of the matrix, and the TFTs (6). With this arrangement, unnecessary electric fields coming into the liquid crystal layer (18) can be shut out. The common bus lines (3) and the common electrodes are both formed on or in the inter-layer insulating film (12), towards the side of the said liquid crystal layer (18). Whereas, the data bus lines (2), the said gate bus lines (7, 1), and pixel electrodes (4) are all formed far away from the liquid crystal layer, across the inter-layer insulating film (12).
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: November 18, 2003
    Assignee: NEC LCD Technologies, Ltd.
    Inventor: Michiaki Sakamoto
  • Patent number: 6641873
    Abstract: A method of making a display includes providing a transparent support and providing a conductive transparent layer formed thereover; patterning the transparent conductive layer; and coating a soluble layer including liquid crystal material dispersed in a polymer matrix over the patterned transparent layer and drying such coated soluble layer. The method further includes providing an opaque hydrophobic conductive layer over the dried coated soluble layer; patterning the opaque hydrophobic layer to form conductors leaving exposed portions of the transparent dried coated soluble layer, the position of the conductors relative to the transparent conductive layer defines image pixels; and removing by a solvent the exposed portions of the dried coated soluble layer so that when a potential for each pixel is applied between the patterned transparent conductive layer and patterned corresponding opaque hydrophobic conductors, an image is provided by the dried coated soluble layer which is viewable by an observer.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: November 4, 2003
    Assignee: Eastman Kodak Company
    Inventor: James F. Elman
  • Patent number: 6642978
    Abstract: The present invention discloses a liquid crystal display (LCD) device and a method of fabricating the same that can be used in a large size with a TN or an AFLC. More specifically, a liquid crystal display includes first and second substrates, a light-transmitting portion in the first and second substrates, wherein the light-transmitting portion has a first cell gap, a light-shielding portion in the first and second substrates, wherein the light-shielding portion has a second cell gap, wherein the second cell gap is larger than the first cell gap, and a liquid crystal layer between the first and second substrates.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: November 4, 2003
    Assignee: LG. Philips LCD Co., Ltd.
    Inventor: Jong-Sung Kim
  • Patent number: 6636284
    Abstract: This invention provides an electro-optical device that includes on a TFT array substrate, scanning lines, data lines, a plurality of TFTs connected to these lines, pixel electrodes connected to the TFTs, an upper light shield layer which is formed in a grid-like configuration above the plurality of TFTs and defines a non-aperture area of each pixel, and a lower light shield layer which is formed in a grid-like configuration beneath the plurality of TFTs. In an image display area in a plan view, the formation area of the lower light shield layer is within the formation area of the upper light shield layer, and a channel region of the TFT is within a crossing portion of the lower light shield layer. In this arrangement, the electro-optical device presents a high quality image with increased light resistance.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: October 21, 2003
    Assignee: Seiko Epson Corporation
    Inventor: Takashi Sato
  • Patent number: 6618108
    Abstract: An active matrix-type liquid crystal display device is provided with a black matrix which prevents light leakage between pixels, wherein the apertures in the black matrix in panel peripheral regions are made smaller than the apertures in the black matrix in the panel center region. Consequently, the occurrence of light leakage due to alignment anomalies arising from the horizontal-direction electric field between the signal lines and scanning lines and the pixel electrodes can be suppressed, and display quality can be enhanced without detracting from manufacturing efficiency or yield and without reducing the brightness of the liquid crystal display device, so that this invention affords excellent advantages.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: September 9, 2003
    Assignee: Advanced Display Inc.
    Inventor: Hitoshi Koyama
  • Patent number: 6610997
    Abstract: An electro-optical device includes a TFT, a data line, a scanning line, and a pixel electrode, which are provided above a substrate, a semiconductor layer which constitutes the TFT being connected to the pixel electrode through a relay film. A light-shielding conductive film provided between the data line and the relay film is electrically connected to a capacitor electrode which consists of the same film as the scanning line provided between the relay film and the semiconductor layer at a constant potential, thereby forming a storage capacitor between the films. Therefore, in an electro-optical device of a type in which a light-shielding film against incident light is provided above pixel switching TFT, and a light-shielding film against returned light is provided below the TFT, the pixel aperture ratio can be increased, and the storage capacitor can be enlarged.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: August 26, 2003
    Assignee: Seiko Epson Corporation
    Inventor: Masao Murade
  • Patent number: 6608658
    Abstract: The present invention provides a method of fabricating a TFT structure by two masking processes. More specifically, a light shielding layer and an interlayer insulating layer are sequentially formed on a substrate, and then source/drain electrodes are formed on the interlayer insulating layer (a first masking step). A semiconductor layer, a gate insulating layer and a gate metal layer are sequentially formed so as to cover the source/drain electrodes, and a gate electrode is formed in a second masking step. Subsequently, the gate insulating layer and the semiconductor layer are etched, and the interlayer insulating layer and the light shielding layer, which are disposed under the source/drain electrodes, are etched using the source/drain electrodes as a mask, thus obtaining a top gate TFT structure.
    Type: Grant
    Filed: July 20, 2000
    Date of Patent: August 19, 2003
    Assignee: International Business Machines Corporation
    Inventors: Takatoshi Tsujimura, Takashi Miyamoto
  • Patent number: 6608660
    Abstract: In a color liquid crystal display device capable of performing reflective display, in order to realize superior display quality and high reliability, a reflector (2), a shading film (13), a coloring layer (4), a protective film (6), and a transparent electrode (7) are sequentially formed on a substrate (1) having insulating properties. Among the films and layers mentioned above, the coloring layer (4) is formed so as to cover the reflector (2), whereby the reflector (2) does not come into contact with chemical reagents and the like. In addition, since the coloring layer (4) is formed so as to cover the shading film (13), surface reflection at the shading film (13) is not only suppressed, but also, an optical density required for the shading film (13) can be less. In particular, since light passes through the shading film twice in reflective display, when reflective display is primarily performed, the optical density of the shading film (13) can be even less.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: August 19, 2003
    Assignee: Seiko Epson Corporation
    Inventors: Eiji Okamoto, Takumi Seki, Keiji Takizawa
  • Patent number: 6608654
    Abstract: The present invention relates to methods of fabricating pixel electrodes (44) for active matrix displays including the formation of arrays of transistor circuits in thin film silicon (10) on an insulating substrate and transfer of this active matrix circuit onto an optically transmissive substrate (24). An array of color filter elements can be formed prior to transfer of the active matrix circuit that are aligned between a light source for the display and the array of pixel electrodes to provide a color display.
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: August 19, 2003
    Assignee: Kopin Corporation
    Inventors: Paul M. Zavracky, Duy-Phach Vu, Brenda Dingle, Matthew Zavracky, Mark B. Spitzer
  • Patent number: 6600541
    Abstract: A liquid crystal display device which can prevent light leaks due to the influence of signal lines includes, in each pixel area on a liquid-crystal-side surface of one of substrates disposed in opposition to each other with a liquid crystal interposed therebetween, a switching element to be driven by supply of a scanning signal from a gate signal line, a pixel electrode to be supplied with a video signal from a drain signal line via the switching element, and a counter electrode which causes an electric field to be generated between the counter electrode and the pixel electrode.
    Type: Grant
    Filed: October 16, 2001
    Date of Patent: July 29, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Nagatoshi Kurahashi, Masahiro Ishii, Yoshiaki Nakayoshi
  • Patent number: 6597413
    Abstract: The present invention provides electro-optical device that can include, on a TFT array substrate, pixel electrodes, TFTs for switching the respective pixel electrodes, and scanning lines and data lines respectively connected to the TFTs. By laminating a capacitive electrode and a capacitive line with an interlayer insulator interposed therebetween, a storage capacitor can be formed in a region overlapping the scanning line in a plan view. This arrangement increases a pixel aperture ratio and the capacitance of the storage capacitor, thereby reducing cross-talk and ghost and presenting a high-quality image display.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: July 22, 2003
    Assignee: Seiko Epson Corporation
    Inventor: Hisaki Kurashina