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Michiaki Sakamoto

Michiaki Sakamoto, Tokyo JP

Patent application numberDescriptionPublished
20080198315Liquid crystal display device and method of fabricating the same - A liquid crystal display device including a first substrate, a second substrate facing and spaced away from the first substrate, a liquid crystal layer sandwiched between the first and second substrates, a switching device formed on the first substrate, a first electrically insulating film randomly patterned on the first substrate, a second electrically insulating film covering the first electrically insulating film therewith, and having a wavy surface, and a reflection electrode formed on the second electrically insulating film, and electrically connected to an electrode of the switching device, wherein a light passing through the second substrate and the liquid crystal layer is reflected at the reflection electrode, and the second electrically insulating film extends outwardly from the first electrically insulating film by a certain length at an end of a display region in which images are to be displayed, such that a step formed by the first and second electrically insulating films in the vicinity of the end of the display region is smoothed.08-21-2008
20080286890LIQUID CRYSTAL DISPLAY DEVICE AND METHOD OF FABRICATING THE SAME - A liquid crystal display device including a first substrate, a second substrate facing and spaced away from the first substrate, a liquid crystal layer sandwiched between the first and second substrates, a switching device formed on the first substrate, a first electrically insulating film randomly patterned on the first substrate, a second electrically insulating film covering the first electrically insulating film therewith, and having a wavy surface, and a reflection electrode formed on the second electrically insulating film, and electrically connected to an electrode of the switching device, wherein a light passing through the second substrate and the liquid crystal layer is reflected at the reflection electrode, and the second electrically insulating film extends outwardly from the first electrically insulating film by a certain length at an end of a display region in which images are to be displayed, such that a step formed by the first and second electrically insulating films in the vicinity of the end of the display region is smoothed.11-20-2008
20090079918Liquid crystal display device and method of fabricating the same - A liquid crystal display device including a first substrate, a second substrate facing and spaced away from the first substrate, a liquid crystal layer sandwiched between the first and second substrates, a switching device formed on the first substrate, a first electrically insulating film randomly patterned on the first substrate, a second electrically insulating film covering the first electrically insulating film therewith, and having a wavy surface, and a reflection electrode formed on the second electrically insulating film, and electrically connected to an electrode of the switching device, wherein a light passing through the second substrate and the liquid crystal layer is reflected at the reflection electrode, and the second electrically insulating film extends outwardly from the first electrically insulating film by a certain length at an end of a display region in which images are to be displayed, such that a step formed by the first and second electrically insulating films in the vicinity of the end of the display region is smoothed.03-26-2009
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
20110027460TRANSFLECTIVE TYPE LCD AND METHOD FOR MANUFACTURING THE SAME - A method for manufacturing a transflective type LCD having a first substrate provided thereon with a plurality of scanning lines and a plurality of signal lines which are substantially perpendicular to each other and a switching element arranged near each of intersections between said scanning lines and said signal lines, includes forming a reflection region having a reflection electrode film and a transmission region having a transparent electrode film in each pixel surrounded by said scanning lines and said signal lines, a liquid crystal being sandwiched at a gap between said first substrate and a second substrate which is arranged opposite to said first substrate, and forming an organic film having irregularities thereon below said reflection electrode film and said transparent electrode film to substantially the same film thickness.02-03-2011
20110128484LIQUID CRYSTAL DISPLAY DEVICE AND METHOD OF FABRICATING THE SAME - A liquid crystal display device includes a first substrate, a second substrate, and a liquid crystal layer sandwiched between the first and second substrates. The first substrate includes first to N-th 1st retardation plates arranged on the first transparent substrate, and the second substrate includes first to N-th 2nd retardation plates arranged on the second transparent substrate. Assuming that a retardation plate among the first to N-th 1st retardation plates has an optical axis arranged at a first angle relative to a reference direction and a retardation plate among the first to N-th 2nd retardation plates, corresponding to the retardation plate among the first to N-th 1st retardation plates, has an optical axis arranged at a second angle relative to the reference direction, the first and second angles are different from each other by about 90 degrees.06-02-2011

Patent applications by Michiaki Sakamoto, Tokyo JP

Michiaki Sakamoto, Kawasaki-Shi JP

Patent application numberDescriptionPublished
20090267969IMAGE DISPLAY DEVICE HAVING MEMORY PROPERTY, DRIVING CONTROL DEVICE AND DRIVING METHOD TO BE USED FOR SAME - There is provided an image display device capable of obtaining a renewed screen giving normal feelings by simple LUT (Look Up Table) adjustment even at a time of displaying with multiple gray levels. A screen of the electronic paper section making up the display device is renewed by driving for a period of time corresponding to a plurality of frames according to input gray level data of a renewed screen. The renewed screen is displayed with a coarse gray level during a first displaying period in a renewing period corresponding to a plurality of frames at an output voltage specified by a high-order bit of its gray level data and, thereafter, is displayed with a fine gray level during a second displaying period in the renewing period at an output voltage specified by a low-order bit of its gray level data.10-29-2009

Patent applications by Michiaki Sakamoto, Kawasaki-Shi JP

Michiaki Sakamoto, 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

Michiaki Sakamoto, Nakahara-Ku JP

Patent application numberDescriptionPublished
20090009447TRANSFLECTIVE TYPE LCD DEVICE HAVING EXCELLENT IMAGE QUALITY - An LCD device has a reflective area that reflects light incident from a polarizing film side using a reflection film, and a transmissive area that transmits light of a backlight incident from a TFT substrate side. The drive voltages of the reflective area and transmissive area are Vr and Vt, the black voltage in the reflective area is Vr (K), the black voltage in the transmissive area is Vt (K). The reflectance R, the transmittance T, characteristics of R with respect to drive voltage [Vr(K)-Vr] and characteristics of T with respect to drive voltage [Vt-Vt (K)] substantially match each other.01-08-2009