Patents Assigned to Display Technologies
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Patent number: 7295647Abstract: In order to improve the reliability of the operation of switching the scan direction in a bidirectional shift register without using a complex circuit configuration or complex timing, a clock signal is maintained at a high level by a controller around the timing of the switching of the scan direction in a bidirectional shift register including a plurality of stages of unit shift registers connected to each other in which the scan direction is switched. Alternatively, a power supply VDD is connected to the output terminal of a first clocked inverter in the unit shift register of any one of the odd-numbered stages through third and fourth transfer gates, which become conducting at the same timing as first and second transfer gates of the input terminal of the first clocked inverter, respectively.Type: GrantFiled: November 28, 2005Date of Patent: November 13, 2007Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventor: Kenji Harada
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Patent number: 7292289Abstract: A liquid crystal display device (L) according to the present invention comprises a liquid crystal display panel (1) having one or more wires on a substrate (1B) thereof, and a housing having holding portions (120a) to (120h) configured to hold opposing end portions of the liquid crystal display panel, wherein a spacing (H2) between a portion of an outermost wire (20a) or (20i) of the one or more wires which is located in the vicinity of the holding portion and a portion of an edge of the substrate which is located in the vicinity of the holding portion is larger than a spacing (H1) between a portion of the outermost wire which is other than the portion located in the vicinity of the holding portion and a portion of the edge of the substrate which is other than the portion located in the vicinity of the holding portion.Type: GrantFiled: November 14, 2002Date of Patent: November 6, 2007Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventor: Hiroshi Nagahama
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Patent number: 7291238Abstract: A method of manufacturing a liquid crystal display panel is provided which includes bonding a pair of substrates to each other with a gap maintained therebetween and defining an intake between the substrates, injecting liquid crystal into a space between the substrates through the intake in an environment heated in comparison with room temperature, and sealing the intake by a sealant, with the environment kept heated from the injecting of the liquid crystal.Type: GrantFiled: June 16, 2004Date of Patent: November 6, 2007Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventors: Katsunori Murouchi, Masashi Tatsukawa
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Patent number: 7289185Abstract: A method of manufacturing a display device includes a cell forming step of forming a predetermined number of cells on a mother substrate, a first polishing step of chemically polishing an outer surface of the mother substrate with use of a predetermined polishing solution, a dividing step of dividing the chemically polished mother substrate so as to include a number of cells, which is less than the predetermined number, and a second polishing step of mechanically polishing the outer surface of the divided mother substrate with use of a solid polishing agent.Type: GrantFiled: August 26, 2004Date of Patent: October 30, 2007Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventors: Yasushi Kawata, Akio Murayama
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Patent number: 7286109Abstract: Buffer circuits are provided between outputs of a scanning line driver circuit and scanning lines. The buffer circuits each are configured to make rise or fall time of scanning signals at output sides of the buffer circuits substantially the same as or longer than those of the scanning signals at end terminals of the scanning lines when the scanning signals supplied to the scanning lines are rectangular in waveform.Type: GrantFiled: May 17, 2004Date of Patent: October 23, 2007Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventor: Yoshiro Aoki
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Publication number: 20070241690Abstract: A light-emissive display comprising a substrate, a first electrode layer disposed over the substrate, a light-emissive layer disposed over the first electrode layer, and a second electrode layer disposed over the light-emissive layer, wherein the light-emissive layer is patterned to provide a plurality of discrete light-emissive regions, each discrete light-emissive region being a pixel, or a sub-pixel, of the light-emissive display, and wherein the first electrode layer and/or the second electrode layer comprises a plurality of electrodes, each electrode comprising at least two sub-electrodes associated with each discrete light-emissive region.Type: ApplicationFiled: April 11, 2007Publication date: October 18, 2007Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LIMITEDInventor: Euan C. Smith
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Publication number: 20070236630Abstract: In order to realize a thinner liquid crystal display, supporting layers which would otherwise be respectively disposed in polarizing plates, each of which is at the side of a liquid crystal cell, are excluded. And retardation films, which are respectively disposed in the polarizers, each of which is at the side of the liquid crystal cell, are used with an additional function as protective layers of the polarizers. In order to reduce display unevenness, absorption axes of the polarizers are neither parallel nor perpendicular to slow axes respectively of the retardation films. Moreover, the absorption axes of the polarizers are neither parallel nor perpendicular to any one of the sides of the respective retardation films.Type: ApplicationFiled: January 22, 2007Publication date: October 11, 2007Applicant: Toshiba Matsushita Display TechnologyInventors: Keiji TAGO, Hirokazu MORIMOTO, Yoshitaka YAMADA
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Patent number: 7279524Abstract: A method for forming a conjugated polymer which is doped by a dopant includes the steps of (a) adding a doping agent comprising a dopant moiety to a solution containing the conjugated polymer or a precursor thereof and, optionally, a second polymer, the dopant moiety being capable of bonding to the conjugated polymer, precursor thereof or the second polymer; (b) allowing the dopant moiety to bond to the conjugated polymer, precursor thereof or the second polymer to perform doping of the conjugated polymer, wherein the amount of doping agent added in step (a) is less than the amount required to form a fully doped conjugated polymer.Type: GrantFiled: March 3, 2006Date of Patent: October 9, 2007Assignee: Cambridge Display Technology Ltd.Inventors: Peter Kian-Hoon Ho, Ji-Seon Kim, Richard Henry Friend
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Publication number: 20070229424Abstract: In order to maintain display performance of a display device, the display device includes an optical sensor disposed across three sub-pixels of red, green and blue colors in each pixel. This configuration makes it possible to adjust the aperture ratios of the respective sub-pixels, and thus to make the amount of light passing through the respective sub-pixels closer to one another. In other words, the white balance can be maintained.Type: ApplicationFiled: December 4, 2006Publication date: October 4, 2007Applicant: Toshiba Matsushita Display Technology Co., Ltd.Inventors: Hirotaka Hayashi, Yoshitaka Yamada, Takashi Nakamura, Norio Tada, Hiroki Nakamura
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Publication number: 20070229447Abstract: Common signals VCOM during a black voltage writing period are set to be larger than common signals VCOM during a video writing period. The common voltage signals VCOM is VmH or VmL during the black voltage writing periods. The common voltage signals VCOM is VcH or VcL during video writing periods and video holding periods. The polarity of the common voltage signals VCOM is inverted alternately from frame to frame. A backlight is extinguished in the black voltage writing period.Type: ApplicationFiled: March 21, 2007Publication date: October 4, 2007Applicant: Toshiba Matsushita Display Technology Co., Ltd.Inventors: Hiroshi Takahara, Kenji Nakao, Kazuhiro Nishiyama, Yukio Tanaka, Shigesumi Araki, Mitsutaka Okita, Tetsuo Fukami
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Publication number: 20070222718Abstract: A driving method of an electroluminescent (EL) display device for driving the EL display device having EL elements placed in a matrix state thereon, has when a pixel line selected to write a video signal matches with a pixel line selected to supply a current to the EL elements, deselecting at least one of the pixel line selected to write the video signal and the pixel line selected to supply a current to the EL elements.Type: ApplicationFiled: February 20, 2007Publication date: September 27, 2007Applicant: Toshiba Matsushita Display Technology Co., Ltd.Inventor: Hiroshi Takahara
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Publication number: 20070216610Abstract: An organic light emitting diode (OLED) display device is described, the display device having a plurality of pixels each comprising at least two sub-pixels of different types, a first sub-pixel type comprising an OLED device including a first type of OLED material and a second sub-pixel type comprising an OLED device including a second type of OLED material, and wherein at least one of said first and second types of sub-pixel comprises a plurality of series-connected OLED devices. Employing series-connected sub-pixels where different types of OLED material are used for a display such as a color, active matrix OLED display facilitates balancing sub-pixel drive voltages and hence enables the production of display devices with improved efficiency.Type: ApplicationFiled: January 24, 2005Publication date: September 20, 2007Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LIMITEDInventor: Euan Smith
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Patent number: 7270463Abstract: An area light source device includes an L-shaped cold-cathode fluorescent lamp, a wedge-shaped light guide having an incidence surface, on which emission light from the cold-cathode fluorescent lamp is incident, and a reflector that surrounds the cold-cathode fluorescent lamp, has an opening facing the incidence surface, and reflects the emission light from the cold-cathode fluorescent lamp toward the light guide, wherein the opening of the reflector has a shape corresponding to shapes of two mutually neighboring incidence surfaces of the light guide.Type: GrantFiled: October 28, 2005Date of Patent: September 18, 2007Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventors: Yoshinori Yasuda, Toshihiko Ura
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Patent number: 7271533Abstract: A light-emissive device including first and second electrodes, and a light-emissive layer located between the electrodes and containing organic light-emissive material including a plurality of particles spaced from each other by the light-emissive material, at least some of the particles being capable of injecting positive charge carriers into the light-emissive material and at least some of the particles being capable of injecting negative charge carriers into the light-emissive material; whereby electrical charge may pass between the electrodes via at least some of the particles to cause light to be emitted by the light-emissive material between those particles.Type: GrantFiled: July 29, 2002Date of Patent: September 18, 2007Assignee: Cambridge Display Technology LimitedInventors: Julian Carter, Stephen Karl Heeks
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Publication number: 20070210323Abstract: A method of forming an electroluminescent device including the steps of providing a substrate including a first electrode for injection of charge carriers of a first type, forming a semiconductor region by depositing over the substrate a composition containing a first material for transporting charge carriers of the first type and a second material for emission and transporting charge carriers of the first type, and depositing over the semiconducting region a second electrode for injection of charge carriers of a second type.Type: ApplicationFiled: November 19, 2004Publication date: September 13, 2007Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LIMITEDInventors: Jonathan Halls, Matthew Roberts, Nalinkumar Patel
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Patent number: 7268490Abstract: A display device includes a first insulation layer which is disposed on a support substrate with a first refractive index and has a second refractive index which differs from the first refractive index, a second insulation layer which is disposed on the first insulation layer and has a third refractive index which differs from the second refractive index, and a plurality of kinds of color pixels generate lights of different wavelengths, and have a refractive index which is substantially equal to the second refractive index. At least one kind of color pixel is put in contact with the first insulation layer via an opening portion that penetrates the second insulation layer.Type: GrantFiled: June 16, 2006Date of Patent: September 11, 2007Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventor: Masuyuki Oota
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Patent number: 7265740Abstract: In a manufacturing process of a display device, hydrogenation in an I layer of photodiodes D1 and D2 is progressed less than that in a channel portion of a pixel TFT, and a defect density due to dangling bonds not terminated in the I layer of the photodiodes D1 and D2 is made higher than a defect density in the channel portion of the pixel TFT. Thus, while suppressing a leakage current of the pixel TFT, the sensitivity of the photodiodes D1 and D2 to light is improved. Moreover, a gate electrode is provided above an i region of a pin-type optical sensor diode with an insulating film interposed therebetween. Thus, a gate voltage can control a threshold of a bias voltage when a current starts to flow into the optical sensor diode and a leakage current is prevented from flowing into the optical sensor diode.Type: GrantFiled: August 7, 2003Date of Patent: September 4, 2007Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventors: Masahiro Tada, Takashi Nakamura, Norio Tada, Masahiro Yoshida
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Publication number: 20070200990Abstract: In order to suppress noise in display, which would occur due to variations of inclination directions of liquid crystal molecules, and to improve display quality, a first structure in a shape having a discontinuous portion is provided to a first electrode, and a second structure is provided to a second electrode so as to face the discontinuous portion of the first structure. When a voltage is applied to the first and second electrodes to generate an electric field in a liquid crystal layer, the first structure controls the inclination directions of the liquid crystal molecules, and the second structure controls the inclination directions of the liquid crystal molecules existing in the discontinuous portion of the first structure. In the discontinuous portion of the first structure, the amount of light passing through the liquid crystal layer increases, and the liquid crystal molecules are aligned more vertically. Hence, light leakage is reduced.Type: ApplicationFiled: February 9, 2007Publication date: August 30, 2007Applicant: Toshiba Matsushita Display Technology Co., Ltd.Inventors: Jin Hirosawa, Norihiro Yoshida, Arihiro Takeda, Reiko Suwa, Hiroyuki Kimura, Hiroshi Tabatake, Yuuki Morita
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Patent number: 7261457Abstract: A surface light source conversion member, which converts emission light from a light source to planar light, has a predetermined thickness at a part thereof where a light incidence surface of a light guide, which is opposed to the light source, is located. A reflector, which reflects emission light from the light source toward the light incidence surface, includes a clamp portion that clamps the surface light source conversion member in a thickness direction thereof. The clamp portion contacts a corner portion that is formed between a light emission surface of the light guide and the light incidence surface of the light guide and is separated from the light emission surface. The reflector creates a gap, which is smaller than a predetermined thickness, between the light source and the light incidence surface.Type: GrantFiled: December 13, 2005Date of Patent: August 28, 2007Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventor: Kaoru Inoue
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Patent number: 7259819Abstract: A liquid crystal display device includes an array substrate having a pixel electrode formed of a conductor, a counter substrate having a counter electrode facing the pixel electrode, and a liquid crystal layer held between the substrates and containing liquid crystal molecules set in a vertical alignment with respect to the substrates. The pixel electrode had a void space located in the conductor to provide minute domains between which different directors of the liquid crystal molecules are obtained when a potential difference is applied between the array and counter electrodes, and a bridge-wiring member interconnecting adjacent parts of the conductor in the void space, and the bride-wiring member is configured to make an electric field created in a part of the pixel area located on the bridge-wiring member weaker than that created in the minutes domains according to the potential difference.Type: GrantFiled: January 14, 2004Date of Patent: August 21, 2007Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventors: Takeshi Yamaguchi, Kisako Ninomiya, Yasushi Kawata, Yuzo Hisatake, Natsuko Fujiyama, Akio Murayama