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Ken Sumiyoshi

Ken Sumiyoshi, Kanagawa JP

Patent application numberDescriptionPublished
20100328594LIQUID CRYSTAL DISPLAY ELEMENT, DISPLAY DEVICE, AND METHOD FOR DRIVING THE SAME - A liquid crystal display element includes a liquid crystal composition sandwiched between substrates, wherein at least two types of liquid crystal compositions which exhibit liquid crystal phase in different temperature ranges are contained within each one pixel, and each of the at least two types of liquid crystal compositions is sealed and isolated within each pixel.12-30-2010

Ken Sumiyoshi, Kawasaki JP

Patent application numberDescriptionPublished
20090002580LIQUID CRYSTAL DISPLAY DEVICE WITH TOUCH PANEL AND TERMINAL DEVICE - A liquid crystal display device with a touch panel has a reflective display region and a transmissive display region, at least the transmissive display region including a liquid crystal layer energizable according to a lateral electric field mode. The liquid crystal display device includes a liquid crystal layer held between a pair of substrate disposed in confronting relation to each other, observer-side circular polarizer 01-01-2009
20090109169DISPLAY DEVICE AND ELECTRONIC APPLIANCE - To provide a liquid crystal display device capable of switching the range of viewing angles while being able to reduce the cost and thickness of the device, and to provide an electronic appliance having the same. The display device according to the present invention includes: a liquid crystal type display panel having a diffusive reflection part which diffusively reflects light irradiated from the front side while transmitting light from the back side; and a backlight source disposed on a back face of the display panel along the display panel for switchably outputting transmission light of different directivities.04-30-2009
20100007593LIQUID CRYSTAL DISPLAY UNIT DRIVEN IN A LONGITUDINAL-ELECTRIC-FIELD MODE - A LCD unit includes a drive unit that drives a LC layer in at least a part of a unit pixel by applying thereto a longitudinal electric field. The drive unit drives the at least a part of the unit pixel in an image period by applying thereto an image voltage corresponding to an image, and in a preliminary period preceding to the image period by applying a preliminary voltage equal to or higher than a threshold voltage that allows LC molecules in the LC layer to start change of orientation of the LC molecules.01-14-2010
20100171775TRANSFLECTIVE LIQUID CRYSTAL DISPLAY DEVICE - An IPS-mode transflective LCD device includes an array of pixels each including a reflective region and a transmissive region juxtaposed. The reflective region operates in a normally-white mode, and the transmissive region operates in a normally-black mode. A common data signal is supplied to the reflective region and transmissive region, whereas the common electrode signal in the transmissive region is an inverted signal of the common electrode signal in the reflective region, to thereby obtain similar gray-scale levels.07-08-2010
20100238105LIQUID CRYSTAL DISPLAY DEVICE, ELECTRONIC DEVICE COMPRISING SAME, AND CONTROLLER FOR LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device provided herein can be switched between a display mode and a mirror mode, and can ensure a high image quality in the display mode.09-23-2010
20100328778BEAM DIRECTION CONTROL ELEMENT AND METHOD OF MANUFACTURING SAME - A beam direction control element has transparent areas and light absorption areas alternately arranged on a surface of a substrate, wherein the light absorption areas function as a louver for controlling the direction of a beam of light. The beam direction control element is manufactured by disposing an optically transparent material on a first transparent substrate to form transparent ridges which constitute the transparent areas, filling curable and photo-absorptive fluid in gaps between the transparent ridges, and then curing the fluid to form the light absorption areas.12-30-2010

Patent applications by Ken Sumiyoshi, Kawasaki JP

Ken Sumiyoshi, Tokyo JP

Patent application numberDescriptionPublished
20080205083Planar light source, display device, portable terminal device, and ray direction switching element - A planar light source includes a large variable width of an irradiation angle of illumination light, a display device having a large variable width of an angle of field that uses the planar light source, a portable terminal device that uses the display device, and a ray direction switching element that is incorporated in the planar light source. A beam direction regulating element (a louver), which controls a direction of light, and a transparent and scattering switching element, which can switch the transparent state and the scattering state according to ON and OFF of an applied voltage, are provided between a backlight and a liquid crystal panel, whereby it is possible to increase a variable width of an irradiation angle of light in the planar light source and increase a variable width of an angle of field of the liquid crystal display device that uses the planar light source.08-28-2008
20080304791LIGHT SOURCE DEVICE AND METHOD FOR MANUFACTURING THE SAME, DISPLAY DEVICE AND METHOD FOR MANUFACTURING THE SAME, AND METHOD FOR DRIVING DISPLAY DEVICE - In a light source device, a row of fibers is provided in which a plurality of optical fibers is arrayed in a single row in parallel fashion separately from each other. A light-direction controller is disposed on one side of the optical fibers, main fibers is disposed above and below the light-direction controller, and a main fiber is disposed at the other end of the row of fibers. Light sources are connected to each of the end portions of the main fibers. Three types of mirrors that mutually differ in direction are formed on the surface of the light-direction controller, light emitted from a main fiber enters the optical fibers by way of a first mirror, and light emitted from a main fiber enters the optical fibers by way of a second mirror.12-11-2008
20090135336Light source, display device, portable terminal device, and ray direction switching element - A planar light source includes a large variable width of an irradiation angle of illumination light, a display device having a large variable width of an angle of field that uses the planar light source, a portable terminal device that uses the display device, and a ray direction switching element that is incorporated in the planar light source. A beam direction regulating element (a louver), which controls a direction of light, and a transparent and scattering switching element, which can switch the transparent state and the scattering state according to ON and OFF of an applied voltage, are provided between a backlight and a liquid crystal panel, whereby it is possible to increase a variable width of an irradiation angle of light in the planar light source and increase a variable width of an angle of field of the liquid crystal display device that uses the planar light source.05-28-2009
20090213298OPTICAL MODULATING DISPALY DEVICE AND PRODUCTION METHOD THEREFOR AND DISPLAY APPARATUS MOUNTING THE OPTICAL MODULATING DISPLAY DEVICE THEREON - The present invention relates to an optical modulating display device (08-27-2009
20090251641Liquid crystal display device, backlight used for same display device, method for driving same backlight and method for manufacturing same backlight - A Liquid Crystal Display (LCD), a backlight used for the LCD and a method for producing the LCD and the backlight are provided which are capable of inhibiting an increase in component counts and in assembling processes and of reducing them, thereby achieving low costs. A display image is obtained by arranging a backlight section being able to perform scanning as a single unit in a manner that it positionally matches a liquid crystal displaying section. The backlight section is provided with a plurality of scanning electrodes and light emitting layers each providing a different luminescent color, and being spatially separated from each other on a principal face of the backlight and scanning is performed on a plurality of light emitting layers providing a different luminescent color.10-08-2009
20100066964LIQUID CRYSTAL DISPLAY AND METHOD OF MANUFACTURING THE SAME AND METHOD OF DRIVING THE SAME - A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.03-18-2010
20100220263Light source, display device, portable terminal device, and ray direction switching element - A planar light source includes a backlight that emits light in a planar shape, a ray direction regulating element that regulates a direction of light made incident from the backlight and emits the light, whereby a directivity of the light is improved, and in which a transparent area for transmitting light and an absorption area for absorbing light are formed, and a transparent and scattering switching element that is switchable between a state in which light which is transmitted by the ray direction regulating element and made incident on the switching element is transmitted and a state in which the light is scattered. The transparent areas are formed in a shape of a matrix including a plurality of rows and a plurality of columns, the transparent and absorption areas are formed alternately, and the absorption area is formed so that the transparent areas are separated.09-02-2010
20110126975Light-Condensing Film, Liquid-Crystal Panel and Backlight as well as Manufacturing Process for Light-Condensing Film - A conventional liquid crystal display comprises a number of components, so that a manufacturing cost cannot be reduced. Furthermore, a large-area substrate has problems in shipping. According to this invention, a liquid-crystal panel is prepared by forming individual optically functional films, a TFT device and a light-emitting device on a long thin film and then laminating the film by a transfer process. A base film to be a substrate in a liquid-crystal panel preferably has a thickness of 10 μm to 200 μm, a curvature radius of 40 mm or less as a measure of flexibility and a coefficient of thermal expansion of 50 ppm/° C. or less. Furthermore, it more preferably gives a variation of ±5% or less in mechanical and optical properties to a thermal history at 200° C.06-02-2011

Patent applications by Ken Sumiyoshi, Tokyo JP

Ken Sumiyoshi, Nakahara-Ku JP

Patent application numberDescriptionPublished
20090079919DISPLAY DEVICE, AND PORTABLE DEVICE AND TERMINAL DEVICE INCORPORATING SUCH DISPLAY DEVICE - A liquid crystal display device comprises a plurality of pixels arrayed in a first direction and a second direction, each of the pixels having a reflective area in at least a portion thereof. The reflective area comprises a surface-irregularity film that is a film having a plurality of surface irregularities, a light reflecting film disposed as an upper layer over the surface-irregularity film, and an electrode group disposed as an upper layer over the light reflecting film. The electrode group in each of the pixels that are arrayed in at least the first direction comprises at least two types of electrode patterns having different layouts.03-26-2009

Ken Sumiyoshi, Nakaharu-Ku JP

Patent application numberDescriptionPublished
20090079921LIQUID CRYSTAL DISPLAY DEVICE - To suppress light leakage at the time of dark state, and to provide a liquid crystal display device whose electrodes in the reflection areas can be formed with high precision. The liquid crystal display device has a reflection area within a pixel unit by corresponding at least to a reflection plate forming part, and the reflection area is driven with a lateral electric field mode and normally-white. A driving electrode for forming an electric field to a liquid crystal layer of the reflection area is formed on the reflection plate via an insulating film by using a non-transparent electric conductor.03-26-2009