Patents Assigned to Epson Imaging Devices Corporation
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Publication number: 20090051859Abstract: There is provided a liquid crystal display panel that includes an array substrate having at least a pixel electrode and a switching element for every pixel area in a display area on a transparent substrate, a color filter substrate in which a light shielding layer made of a resin is formed on a transparent substrate at least outside the display area and a color filter layer is formed to oppose the pixel electrode, and liquid crystal enclosed between the array substrate and the color filter substrate that are bonded by a seal material. A protection film having an opening, the opening being opened in the display area, is formed on the color filter substrate in the outside of the display area to cover at least the portion of the light shielding layer on which the seal material is formed.Type: ApplicationFiled: August 12, 2008Publication date: February 26, 2009Applicant: EPSON IMAGING DEVICES CORPORATIONInventors: Hiroki SUGIYAMA, Tomoyuki NAKANO, Keiji TAKIZAWA
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Patent number: 7495927Abstract: A mounting structure includes a base member and an electronic component having a protruded electrode which is formed on a transparent substrate. The electrode includes pads and elastic projections that are covered with a conductive film. On the transparent substrate, terminals connected to the conductive film are formed. Dummy projections are provided on the surface of the base member. When mounting the electronic component, the electrodes are deformed by the pressure for the mounting. The dummy projections formed on the base member are also deformed. A pattern, for visually inspecting the deformation volume of dummy projections, is marked on the transparent substrate.Type: GrantFiled: December 14, 2007Date of Patent: February 24, 2009Assignee: Epson Imaging Devices CorporationInventors: Hiroaki Furihata, Hiroyuki Onodera
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Patent number: 7495738Abstract: A display allowing recycling of a flexible printed circuit board and a light source mounted thereon after disassembling of the flexible printed circuit board and the light source is obtained. In this display, the adhesive strength of a surface of a first double-faced adhesive tape bonded to the first flexible printed circuit board mounted with the light source is lower than the adhesive strength of another surface of the first double-faced adhesive tape bonded to the first display panel.Type: GrantFiled: July 21, 2006Date of Patent: February 24, 2009Assignee: Epson Imaging Devices CorporationInventor: Tatsumi Okuda
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Patent number: 7495594Abstract: A D/A converter with reduced power consumption is offered by reducing an amount of electric charges that is charged and discharged as D/A conversion is performed. A terminal of each of four capacitors C1, C2, C3 and C4 is connected to a common node. The capacitors C1, C2, C3 and C4 have capacitances C, C, 2C and 4C, respectively. A selection circuit SEL is provided with selection transistors ST1, ST2, ST3, ST4, ST5 and ST6, and selects and outputs either a first reference electric potential V1 or a second electric potential V2 according to a value of each bit of the digital signals D0, D1 and D2. Each of transfer transistors TT1, TT2 and TT3 transfers each of outputs of the selection circuit SEL to another terminal of corresponding each of the capacitors C2, C3 and C4, respectively, in response to a start pulse STP.Type: GrantFiled: September 27, 2007Date of Patent: February 24, 2009Assignee: Epson Imaging Devices CorporationInventor: Hiroyuki Horibata
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Publication number: 20090046230Abstract: A liquid crystal display device includes a pair of substrates opposing each other, a liquid crystal layer disposed between the pair of substrates, and a pair of electrodes separated by an insulating layer, disposed on one of the substrates The pair of electrodes drives the liquid crystal layer. The insulating layer has a compressive stress in the range of 0 to 5×104 N/cm2.Type: ApplicationFiled: July 29, 2008Publication date: February 19, 2009Applicant: EPSON IMAGING DEVICES CORPORATIONInventors: Toru SAKURAI, Togo MORIFUJI, Yuji YAMAMOTO
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Patent number: 7492515Abstract: An image display capable of providing stereoscopic images to an observer in both of a vertically arranged state and a horizontally arranged state is obtained. This image display comprises display portion for displaying an image, a light source for applying light to the display portion, first polarization axis control part or portion for separating the light emitted from the light source into light having a first polarization axis and light having a second polarization axis in a state where at least a prescribed reference side of the display portion is arranged in a first direction and second polarization axis control portion for separating the light emitted from the light source to light having at least two different polarization axes in a state where the prescribed reference side of the display portion is arranged in a second direction intersecting with the first direction.Type: GrantFiled: May 31, 2006Date of Patent: February 17, 2009Assignee: Epson Imaging Devices CorporationInventors: Goro Hamagishi, Satoshi Takemoto
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Patent number: 7492425Abstract: A liquid crystal device includes: a first substrate including a scanning line, a data line, a switching element, a pixel electrode and a storage capacitor associated with an intersection of the scanning line and the data line; a second substrate; and liquid crystal interposed between the substrates. A region where the pixel electrode is provided includes a reflective region and a transmissive region. An insulation layer is provided in the reflective region and the transmissive region to cover the switching element. A liquid crystal thickness adjustment layer is provided on the insulation layer in the reflective region. The pixel electrode is provided on the insulation layer in the transmissive region and on the liquid crystal thickness adjustment layer in the reflective region. Further, the storage capacitor includes an electrode disposed on the insulation layer in the reflective region and electrically connected to the pixel electrode.Type: GrantFiled: July 27, 2006Date of Patent: February 17, 2009Assignee: Epson Imaging Devices CorporationInventor: Kazuyoshi Sakai
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Patent number: 7492514Abstract: An image display provides a stereoscopic image to an observer by advancing either light having a first polarization axis or light having a second polarization axis toward the eyes of the observer while arranging a prescribed reference side of a display panel in a first direction, and provides another stereoscopic image to the observer by advancing either light having a third polarization axis or light having a fourth polarization axis toward the eyes of the observer while arranging the prescribed reference side of the display panel in a second direction intersecting with the first direction.Type: GrantFiled: March 31, 2006Date of Patent: February 17, 2009Assignee: Epson Imaging Devices CorporationInventors: Goro Hamagishi, Satoshi Takemoto
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Publication number: 20090033641Abstract: Each scan line 112 has a unit circuit 40 that has TFTs 62,64 and 66. Capacitance C1 is short-circuited by the TFTs. Reset signal Rst is supplied to the gate electrode of TFT 62. the source electrode of TFT 62 is connected to a gate-on power supply line Vgon. The gate electrode of TFT 66 is connected to the drain electrodes of TFT 62 and 64, and the drain electrode of TFT 66 is connected to the gate electrode of TFT 42. The source electrodes of TFT 64 and 66 are connected to their own scan lines 112.Type: ApplicationFiled: June 11, 2008Publication date: February 5, 2009Applicant: EPSON IMAGING DEVICES CORPORATIONInventor: Katsunori YAMAZAKI
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Publication number: 20090033855Abstract: A mounting terminal portion 33A of an FFS mode liquid crystal display panel includes a gate insulator 14 and a passivation film 17 covering a surface of a wiring 34 for a mounting terminal, a contact hole 36a penetrating therethrough, a first transparent conductive film 38 electrically connected to the wiring 34 for a mounting terminal, an insulator 23 formed with an opening 36b having a smaller diameter than the diameter of the contact hole 36a in a central part of the first transparent conductive film 38, and a mounting terminal formed of a second transparent conductive film 41 electrically connected to the first transparent conductive film 38.Type: ApplicationFiled: July 25, 2008Publication date: February 5, 2009Applicant: EPSON IMAGING DEVICES CORPORATIONInventors: Hideki KANEKO, Masahiro Horiguchi
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Patent number: 7484877Abstract: A light emitting device includes a light source and a light guide body having a light guiding surface from which light emitted from the light source is received and having a light emitting surface from which the received light is emitted. A plurality of rows of light source arrays each formed by a plurality of the light sources are provided on the light guiding surface.Type: GrantFiled: April 10, 2007Date of Patent: February 3, 2009Assignee: Epson Imaging Devices CorporationInventors: Taketoshi Masamoto, Kazunari Sato
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Patent number: 7486365Abstract: A liquid crystal device includes: a pair of substrates with liquid crystal interposed therebetween; a first electrode formed on one of the pair of substrates; an insulating layer formed on the first electrode; and a second electrode that is formed on the insulating layer corresponding to a pixel region so as to generate an electric field, the electric field being generated between the first and second electrodes. The first electrode is provided with a plurality of apertures within the pixel region.Type: GrantFiled: January 4, 2006Date of Patent: February 3, 2009Assignee: Epson Imaging Devices CorporationInventors: Katsunori Yamazaki, Toshiharu Matsushima
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Publication number: 20090026455Abstract: The occurrence of the poor electric connection between the outer circuit and the liquid crystal display device can be reduced in the manufacturing method of the outer circuit and liquid display device of this invention. The liquid crystal display device has the pixel region 100P and the outer connection region 107. There are the gate metal layer 15 disposed on the gate insulating film 12, the interlayer insulating film 16 covering the gate metal layer 15, the first conductive layer 19 covering the gate metal layer 15 located on the interlayer insulating film 16, the passivation film 20 with the second opening 22 exposing the part of the first conductive layer 19 that covers the gate metal layer 15, and the second conductive layer 26 covering the first conductive layer 19 exposed from the second opening 22 in the outer connection region. The metal bump 50 of the outer circuit is connected on the second conductive layer 26 through thermal pressure treatment.Type: ApplicationFiled: September 25, 2008Publication date: January 29, 2009Applicant: Epson Imaging Devices CorporationInventors: Hiroshi MATSUDA, Hideki Kawada
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Publication number: 20090027579Abstract: A liquid crystal display device comprising: a switching element that has a drain electrode and that is arranged on a substrate; a first insulating film that covers the switching element and that has a first opening on the drain electrode; a first etching stopper electrode that is formed in the first opening and that is connected to the drain electrode; a common electrode that is arranged on the first insulating film; a second insulating film that covers the first etching stopper electrode and the common electrode, and that has a second opening on the first etching stopper electrode; and a pixel electrode that is connected through the second opening to the first etching stopper electrode and that extends onto the second insulating film so as to face the common electrode.Type: ApplicationFiled: July 8, 2008Publication date: January 29, 2009Applicant: EPSON IMAGING DEVICES CORPORATIONInventors: Masaaki AOTA, Satoshi ISHIDA
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Patent number: 7483099Abstract: A liquid crystal device includes a pair of substrates that face each other, a liquid crystal layer that is interposed between the pair of substrates, electrodes that are formed on opposing surfaces of the pair of substrates so as form a plurality of subpixel regions, in each of which a reflective display region having a light-reflective film reflecting light and a transmissive display region transmitting light are provided, and an insulating layer that is formed between one of the pair of substrates and the liquid crystal layer such that a thickness of the liquid crystal layer in the reflective display region is smaller than a thickness of the liquid crystal layer in the transmissive display region. The insulating layer is formed to have a first film thickness in the reflective display region, and is provided between the transmissive display region of a predetermined subpixel region and the transmissive display region of a subpixel region adjacent to the predetermined subpixel region.Type: GrantFiled: February 15, 2006Date of Patent: January 27, 2009Assignee: Epson Imaging Devices CorporationInventors: Kimitaka Kamijo, Hideki Kaneko, Katsuhiro Imai, Tomoyuki Nakano
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Patent number: 7480016Abstract: An electro-optical device that includes a first module, a plate-like second module, and a hinge portion. The first module is provided with an electro-optical panel having a polarizer. The electro-optical panel is disposed on a side of a display surface of the first module, on which surface an image is displayed. The second module is provided with a reflective polarizer and has at least a translucent portion in area that overlaps with the reflective polarizer in a direction perpendicular to the reflective polarizer. The hinge portion couples the first module to the second module.Type: GrantFiled: April 25, 2007Date of Patent: January 20, 2009Assignee: Epson Imaging Devices CorporationInventor: Shoji Hinata
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Publication number: 20090015570Abstract: Pixels include liquid crystal capacitors and holding capacitors having first ends connected to pixel electrodes and second ends connected to common electrodes corresponding to the first to 320th rows. A common electrode driving circuit includes TFTs for individual rows. In a partial mode, when a period in which a level of a scanning signal is high is long, a control signal Vg-c is brought to a high level during the period so that the TFTs are turned on. Since gate voltages are applied to the TFTs, a problem in that the gate voltages are reduced due to voltage leakage and the common electrodes are brought into high-impedance states is avoided. Alternatively, potentials of the common electrodes are fixed to a voltage of a common signal, which is a low-level when positive-polarity writing is specified to all the rows and a high-level when negative-polarity writing is specified to all the rows.Type: ApplicationFiled: April 22, 2008Publication date: January 15, 2009Applicant: Epson Imaging Devices CorporationInventor: Katsunori YAMAZAKI
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Publication number: 20090015533Abstract: A liquid crystal device including a plurality of scanning lines, a plurality of data lines, a plurality of pixel electrodes, a capacitor electrode, a control circuit, a scanning line driving circuit, and a data line driving circuit.Type: ApplicationFiled: June 25, 2008Publication date: January 15, 2009Applicant: EPSON IMAGING DEVICES CORPORATIONInventors: Shin FUJITA, Tomotoshi KATO, Kengo SHIRAGAMI
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Publication number: 20090009503Abstract: A liquid-crystal display includes a gate line, a gate driver supplying gate signals to the gate line, a source line, a source driver supplying source signals to the source line, a pixel electrode to which the source signals are applied via a pixel switching element connected to the source line, a liquid crystal disposed between the pixel electrode and a common electrode, a common electrode driver supplying common electrode signals to the common electrode, a capacitor disposed between the pixel electrode and a capacitor line, a driving circuit alternately changing the voltage level of the capacitor line between a first level and a second level, and a sequence control circuit.Type: ApplicationFiled: June 20, 2008Publication date: January 8, 2009Applicant: EPSON IMAGING DEVICES CORPORATIONInventor: Kenichi TAJIRI
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Publication number: 20090002924Abstract: An electro-optical device includes an electro-optical panel and a holder that directly or indirectly holds the electro-optical panel. At least a part of the holder is formed of a metallic plate, and the at least part of the holder includes a turned-down portion formed by folding a part of a base portion of the metallic plate. The end of the turned-down portion forms a step that holds another component.Type: ApplicationFiled: June 26, 2008Publication date: January 1, 2009Applicant: EPSON IMAGING DEVICES CORPORATIONInventors: Daisuke NAKANISHI, Yasunori ONISHI