Patents Examined by Robert H. Kim
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Patent number: 6795154Abstract: An apparatus for cutting liquid crystal display panels and a cutting method using the same are disclosed in the present invention. The apparatus includes a first scribing unit sequentially forming a plurality of first scribing lines on surfaces of first and second mother substrates having unit liquid crystal display panels and cutting the first and second mother substrates along the first scribing lines, a first turning unit turning the cut first and second mother substrates by 90°, and at least two second scribing units sequentially forming a plurality of second scribing lines on the surfaces of the first and second mother substrates and cutting the first and second mother substrates along the second scribing lines.Type: GrantFiled: December 24, 2002Date of Patent: September 21, 2004Assignee: LG. Philips LCD Co., Ltd.Inventors: Ji-Heum Uh, Sang-Sun Shin
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Patent number: 6795145Abstract: The invention provides a liquid crystal display device including switching elements and a reflection layer having low heat resistance. The liquid crystal display device is capable of reducing or preventing a degradation in the characteristics of the reflection layer due to heating in the manufacturing process. A liquid crystal display device includes a pair of opposing substrates, and a liquid crystal interposed between the substrates. A reflection layer is formed on the substrate, and switching elements (TFDs) to drive the liquid crystal are formed on the liquid crystal side of the substrate. The reflection layer is formed of any one of a dielectric reflection film, a cholesteric reflection film, and a holographic reflection film.Type: GrantFiled: September 17, 2002Date of Patent: September 21, 2004Assignee: Seiko Epson CorporationInventors: Joji Nishimura, Tsuyoshi Maeda, Osamu Okumura
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Patent number: 6795134Abstract: An upper substrate of a liquid crystal display device includes a color filter and a black matrix. A lower substrate includes a gate insulating layer formed of the substrate, a data line formed on the gate insulating layer, a light shielding pattern formed on the gate insulating layer and spaced apart from the data line, a passivation film formed on the data line and the light shielding pattern, a pixel electrode formed on the passivation film and overlapping a portion of the light shielding pattern. The light shielding pattern includes two light shielding lines formed parallel to and on either side of the data line. Such an arrangement reduces a parasitic capacitance between the pixel electrode and the data line, while maintaining a high aperture ratio.Type: GrantFiled: March 4, 2003Date of Patent: September 21, 2004Assignee: LG. Philips LCD Co., Ltd.Inventor: In-Duk Song
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Patent number: 6795149Abstract: This invention relates to a liquid crystal display device, comprising at least one retardation film (4), a nematic liquid crystal layer (5), and a light reflecting RGB patterned cholesteric color filter (6), for reflecting either essentially left-circular or right-circular polarized light, being characterized in that said liquid crystal layer (5) is a super twisted nematic liquid crystal layer having a twist angle in the interval 180-270 degrees, and in that the summed retardation R of the retardation film or retardation films and the liquid crystal layer is equal to approximately R=(3+2n)&lgr;/4, where n=0,1,2,3 . . . .Type: GrantFiled: July 30, 2002Date of Patent: September 21, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Joost Peter André Vogels, Frans Leenhouts, Peter Van De Witte
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Patent number: 6795133Abstract: The storage capacitor of an active matrix liquid crystal display is formed to have a second electrode 28 with a plurality of fingers 50 extending over the first electrode 10. The drain electrode 30 and the second electrode 28 of the storage capacitor may be formed from a single metallization layer. The width of the drain electrode 30 and the fingers 50 of the second electrode 10 will tend to vary in parallel as a result of any process variation in the manufacturing process. The feature that the widths vary in parallel tends to cancel out variation in the kick back voltage.Type: GrantFiled: May 20, 2002Date of Patent: September 21, 2004Assignee: Koninklijke Philips Electronics N.V.Inventor: Steven C. Deane
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Patent number: 6791633Abstract: A liquid crystal display and a method for manufacturing the liquid crystal display which are capable of an inhibiting occurrence of strong flicker even when only pixels each having a same polarity are displayed on a screen, without causing a decrease in an aperture rate. In the above liquid crystal display, first and second data lines each feeding a pixel voltage being different in polarity to each of first and second pixel electrodes through first and second thin film transistors are formed in such a manner that the first data line is overlaid by the second data line with an insulating film being interposed between the first and second data lines.Type: GrantFiled: March 22, 2002Date of Patent: September 14, 2004Assignee: NEC LCD Technologies, Ltd.Inventor: Kimikazu Matsumoto
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Patent number: 6791637Abstract: The present invention relates to display, in particular to a liquid crystal display illuminated by ambient light. The display has a display area, and a light guide system for providing light to the display area, the light guide system comprising: a planar light guiding layer comprised of liquid crystal material and having a light emitting surface and a plurality of side faces disposed around the light emitting surface; a plurality of light pipes, each light pipe having a collector end for collecting ambient light and an output end, the output ends being arranged along the side faces of the light guiding layer so as to introduce the collected light into the guiding medium. The output ends of the light pipes are distributed evenly along each side face of the light guiding layer so as to provide homogeneous illumination to the display area.Type: GrantFiled: February 27, 2002Date of Patent: September 14, 2004Assignee: Hewlett-Packard Development Company, L.P.Inventor: Susanne Klein
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Patent number: 6791651Abstract: An array substrate for an in-plane switching (IPS) mode liquid crystal display (LCD) device including a substrate, a plurality of gate lines disposed along a first direction on the substrate, a plurality of data lines disposed along a second direction perpendicular to the first direction on the substrate to define a plurality of pixel regions, a pixel electrode and a common electrode on the substrate, the pixel electrode including an extension portion, a plurality of vertical portions, and a horizontal portion, and a transparent electrode contacting the horizontal portion of the pixel electrode and extending over one of the gate lines, wherein the data line includes aluminum dual layer structure having a first metal layer and a second metal layer.Type: GrantFiled: November 14, 2002Date of Patent: September 14, 2004Assignee: LG. Philips LCD Co., Ltd.Inventors: Gyoo-Chul Jo, Gee-Sung Chae
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Patent number: 6791647Abstract: A multi-domain liquid crystal display device comprises first and second substrates facing each other; a liquid crystal layer between the first and second substrates; a plurality of gate bus lines arranged in a first direction on the first substrate and a plurality of data bus lines arranged in a second direction on the first substrate to define a plurality of pixel region; a thin film transistor positioned at a crossing area of the data bus line and the gate bus line, the thin film transistor comprising a gate electrode, a semiconductor layer, and source/drain electrodes; a common-auxiliary electrode comprising at least one electrode in the each pixel region; a plurality of pixel electrodes electrically charged through the thin film transistor; and an alignment layer on at least one substrate between the first and second substrates.Type: GrantFiled: June 21, 2000Date of Patent: September 14, 2004Assignee: LG Philips LCD Co., Ltd.Inventors: Jeom Jae Kim, Doo Hyun Ko, Joun Ho Lee, Jong Soon Kim, Jong Hwan Kim, Young Woo Cho, Mi Kyung Chu
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Patent number: 6791659Abstract: An apparatus and method for fabricating a liquid crystal display that is capable of shortening a liquid crystal exhaust time in a liquid crystal injection and sealing process to improve the productivity of the liquid crystal display. In the apparatus and method, a heater heats a high-pressure air pressurizing the upper plate and the lower plate of the liquid crystal display panel to heat and pressurize the upper plate and the lower plate of the liquid crystal display panel. Accordingly, the liquid crystal is heated when it is exhausted by the pressurization to have a low viscosity, so that a liquid crystal exhaust time can be shorted to improve the productivity of the liquid crystal display.Type: GrantFiled: November 13, 2003Date of Patent: September 14, 2004Assignee: LG. Philips LCD Co., Ltd.Inventor: Choul Min Choi
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Patent number: 6792176Abstract: An optical switch has first to fourth optical matrix switches in each of which a plurality of 2-input/2-output optical switch elements are arranged in a matrix to form a plurality of input ports, a plurality of auxiliary input ports, a plurality of output ports, and a plurality of auxiliary output ports. The auxiliary output ports in the first optical matrix switch are connected to the respective input ports in the third optical matrix switch, the output ports in the second optical matrix switch are connected to the respective auxiliary input ports in the third optical matrix switch, the output ports in the first optical matrix switch are connected to the respective auxiliary input ports in the fourth optical matrix switch, and the auxiliary output ports in the second optical matrix switch are connected to the respective input ports in the fourth optical matrix switch.Type: GrantFiled: April 17, 2001Date of Patent: September 14, 2004Assignee: Fujitsu LimitedInventors: Tetsuya Nishi, Satoshi Kuroyanagi
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Patent number: 6792078Abstract: The invention is intended to shorten a positioning time required for forming an irradiation area with high accuracy using a number of leaf plates, and to reduce physical and mental burdens imposed on patients. A multi-leaf collimator comprises leaf plate driving body each including a plurality of movable leaf plates and provided respectively on one side and the other side, the plurality of leaf plates of the leaf plate driver on one side and the plurality of leaf plates of the leaf plate driver on the other side being disposed in an opposing relation to form an irradiation field of a radiation beam between the opposing leaf plates. Each of the leaf plate driving body includes a motor provided in common to the plurality of leaf plates. Driving force of the motor can be transmitted to the plurality of leaf plates at the same time through a pinion gear, upper and lower air cylinders, and upper and lower guides. Also, the driving force can be cut off selectively for each leaf plate.Type: GrantFiled: August 31, 2001Date of Patent: September 14, 2004Assignee: Hitachi, Ltd.Inventors: Kohei Kato, Hiroshi Akiyama, Masaki Yanagisawa
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Patent number: 6791653Abstract: An in-plane switching mode liquid crystal display includes a first substrate and a second substrate, a first electrode on the first substrate, a gate insulating film on an entire surface of the first substrate, a second electrode on the gate insulating film for forming an in-plane electric field, together with the first electrode, a protection film on the first electrode and the second electrode, an asymmetric transparent electrode on the protection film, and a liquid crystal layer between the first substrate and the second substrate, thereby shielding against signal distortion caused by Cr black matrix, reducing vertical crosstalk and reducing the driving voltage.Type: GrantFiled: December 15, 2000Date of Patent: September 14, 2004Assignee: LG.Philips LCD Co., Ltd.Inventors: Joun Ho Lee, Jeong Ki Park
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Patent number: 6791635Abstract: A LCD comprises a surface light source device of side light type for auxiliary lighting. A fluorescent lamp is turned on to supply primary light to be introduce into a guide plate. A back face (upper face) of the guide plate provides a light control face including an emission promoting surface to promote emission from an illumination output face (lower face). The illumination output face provides a specular face without scattering power. Illumination light L2 introduced into the guide plate escapes gradually from the back face and the illumination output face on the way of propagation. Some of illumination light emitted from the illumination output face reaches a reflection plate after transmitting a liquid crystal cell and polarization plates. Quantity of light reaching the reflection plate depends on directions of transmission polarization planes of first and second polarization plates as well as state of a liquid crystal layer (depending on voltage applied to transparent electrodes).Type: GrantFiled: March 22, 1999Date of Patent: September 14, 2004Assignee: Enplas CorporationInventors: Shingo Ohkawa, Kazumasa Ohsumi
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Patent number: 6788363Abstract: A reflector structure in a multi-domain liquid crystal display comprises an active matrix device structure having regions of various height levels, a diffusing layer, and a structure of multi-domain reflective layer. The diffusing layer is formed above the active matrix device structure with multiple extruded bumps of various film thickness and various heights and shapes. The reflector structure has various reflective angles and reflective effects to improve the quality of LCD panel. It can be used in the reflective layer of a reflective or semi-reflective TN, STN, TFT, or TFD. The reflector fabrication process uses conventional process for a metal or an insulation layer on a TFT substrate to form multiple domains within a pixel area. After forming the cell structure of the multi-domain reflective layer, liquid crystal cells form multiple domains within a pixel area.Type: GrantFiled: March 11, 2002Date of Patent: September 7, 2004Assignee: Prime View International Corp. Ltd.Inventors: Hong-Da Liu, Hung-Huei Hsu, Wen-Chung Tang, Wen-Jian Lin
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Patent number: 6788360Abstract: A stacked liquid cell, such as a stacked liquid crystal cell, comprises a stack of liquid layers and substrate layers between which the liquid layers are dispersed. The stack comprises a liquid and polymeric substrate layers made from a stratified-phase-separated composite. Being part of a stratified-phase-separated composite, in particular one manufactured in accordance with a single-substrate method, the polymeric layer may have a relative small thickness compared a conventional substrate layer which results in a stacked liquid cell having a reduced thickness or, more particular, a stacked liquid cell having a reduced thickness between subjacent liquid layers giving a reduction in parallax effects. A method of manufacturing a liquid cell involves stratifying, on a substrate, a layer of stratified-phase-separable composition into a liquid layer and a polymeric layer to form a stratified-phase-separated composite, the polymeric layer serving as one of the substrate of the liquid cell.Type: GrantFiled: August 9, 2002Date of Patent: September 7, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Roel Penterman, Dirk Jan Broer
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Thin film transistor substrate for a liquid crystal display and a method for repairing the substrate
Patent number: 6788356Abstract: Disclosed is a thin film transistor substrate for a liquid crystal display and a method for repairing the substrate. The substrate comprises an insulating substrate; a black matrix formed on the insulating substrate having apertures in areas of pixels, shaped as a net; an insulating layer covering the black matrix; gate wiring formed on the insulating layer, the gate wiring including gate lines extended in a first direction across the substrate and gate electrodes connected to the gate lines; a gate insulating layer formed over the gate wiring; a semiconductor layer formed over the gate insulating layer; an ohmic contact layer formed over the semiconductor layer; data wiring including source electrodes and drain electrodes formed separated from each other over the ohmic contact layer, and data lines connected to the source electrodes and crossing the gate lines to define pixels; a protection layer formed over the data wiring; and pixel electrodes electrically connected to the drain electrodes.Type: GrantFiled: May 23, 2001Date of Patent: September 7, 2004Assignee: Samsung Electronics Co., Ltd.Inventor: Jang-Kun Song -
Patent number: 6788364Abstract: Light leakage within pixel area is prevented. A liquid crystal display device includes a light reflection area forming pixel electrode and a reflection film in one portion of a pixel area on a liquid crystal side face of one substrate oppositely arranged through the liquid crystal. A light transmission area forms the pixel electrode in another portion. The pixel electrode as the reflection film is formed on the upper face except for an opening portion of an insulating film. The opening portion is formed in a light transmission area. The opening portion of the insulating film has a fan-shaped taper from the substrate side to the liquid crystal side on the side wall face of this opening portion. At least one portion of this taper is not covered with the pixel electrode used as the reflection film, but is exposed. The insulating film has a light absorption property in at least the taper portion.Type: GrantFiled: November 8, 2002Date of Patent: September 7, 2004Assignee: Hitachi, Ltd.Inventors: Hiroko Hayata, Masayuki Hikiba, Hitoshi Komeno
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Patent number: 6788377Abstract: A liquid crystal device is provided including an exit side substrate portion, an entrance side substrate portion opposed to the exit side substrate portion, and a liquid crystal layer placed between the exit side substrate portion and the entrance side substrate portion. The exit side substrate portion includes an exit side substrate on which a first electrode for driving the liquid crystal layer is formed, and an exit side cover arranged on the exit side with respect to the exit side substrate. The entrance side substrate portion includes an entrance side substrate on which a second electrode for driving the liquid crystal layer is formed, and an entrance side cover arranged on the entrance side with respect to the entrance side substrate. The absolute value of the coefficient of thermal expansion of the exit side cover is less than 37×10−7/° C., and more preferably not more than 10×10−7/° C.Type: GrantFiled: June 21, 2000Date of Patent: September 7, 2004Assignee: Seiko Epson CorporationInventors: Yasunori Ogawa, Takeshi Takezawa, Osamu Okumura
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Patent number: 6784966Abstract: The invention provides a reflection type liquid crystal device, and a projection type display and electronic equipment in which display defects caused by disclination are reduced, minimized or prevented from being produced for a highly fine liquid crystal display with a space between pixels made to be narrow to make it possible to provide a high-contrast and bright display. A liquid crystal device includes a liquid crystal layer sandwiched between a first substrate and a second substrate, and a first electrode and a second electrode formed on a face of the above-described second substrate on a side of the above-described liquid crystal layer. The above-described first electrode and the above-described second electrode are formed so that an electric field substantially parallel to the surface of the substrate with respect to the above-described liquid crystal layer can be applied thereto.Type: GrantFiled: March 4, 2002Date of Patent: August 31, 2004Assignee: Seiko Epson Corp.Inventors: Tsuyoshi Maeda, Kinya Ozawa, Osamu Okumura, Eiji Okamoto, Hirotaka Kawata, Toshiharu Matsushima, Takumi Seki, Kimitaka Kamijo