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Takeharu Kitagawa

Takeharu Kitagawa, Tokyo JP

Patent application numberDescriptionPublished
20110006928COMPOSITE SWITCH AND PORTABLE DEVICE WITH SAME - A composite switch comprises: a first switch that operates by applying a first load to a first key; and a second switch that operates by applying a second load to a second key disposed on the first key.01-13-2011

Takeharu Kitagawa, Osaka JP

Patent application numberDescriptionPublished
20080273153LIQUID CRYSTAL PANEL AND LIQUID CRYSTAL DISPLAY APPARATUS - The liquid crystal panel according to an embodiment of the present invention includes, in the stated order from a viewer side: a first polarizer; a first optical compensation layer; a liquid crystal cell; a second optical compensation layer; and a second polarizer, wherein: 11-06-2008
20090201435LIQUID CRYSTAL DISPLAY DEVICE APPRECIATING ROOM AND METHOD FOR APPRECIATING A LIQUID CRYSTAL DISPLAY DEVICE - Provided is a liquid crystal display device appreciating room making it possible to prevent glare or external-image-projection on the basis of external light so that persons can watch the screen of a liquid crystal display device satisfactorily. The appreciating room comprises a room, a liquid crystal display device arranged inside the room and having a liquid crystal panel 08-13-2009
20090231528LIQUID CRYSTAL PANEL AND LIQUID CRYSTAL DISPLAY APPARATUS - A liquid crystal panel according to an embodiment of the present invention includes: a liquid crystal cell; a first polarizer placed on one side of the liquid crystal cell; a second polarizer placed on another side of the liquid crystal cell; a biaxial optical element placed between the liquid crystal cell and the first polarizer; and a negative C plate placed between the second polarizer and the biaxial optical element. A direction of an absorption axis of the first polarizer is substantially perpendicular to a direction of an absorption axis of the second polarizer. A refractive index ellipsoid of the biaxial optical element has a relationship of nx>nz>ny and a direction of a slow axis of the biaxial optical element is substantially parallel to the direction of the absorption axis of the first polarizer. A refractive index ellipsoid of the negative C plate has a relationship of nx=ny>nz. A wavelength dispersion value (D09-17-2009
20090279031LIQUID CRYSTAL PANEL AND LIQUID CRYSTAL DISPLAY APPARATUS USING THE SAME - A liquid crystal display apparatus is provided, in which excellent viewing angle compensation is conducted, and which is highly excellent in a contrast in an oblique direction and can be reduced in thickness. A liquid crystal panel of the present invention includes a first polarizer, a first optical compensation layer, a liquid crystal cell, a second optical compensation layer, and a second polarizer in the stated order. Each of the first optical compensation layer and the second optical compensation layer contains at least one polymer selected from the group consisting of polyimide, polyamide, polyester, polyetherketone, polyamideimide, and polyesterimide, and have a refractive index profile of nx>ny>nz.11-12-2009
20100110347LIQUID CRYSTAL PANEL AND LIQUID CRYSTAL DISPLAY APPARATUS - There is provided a liquid crystal panel exhibiting a high contrast ratio and a liquid crystal display apparatus including the liquid crystal panel. The liquid crystal panel of the present invention includes a first polarizer, a first optical compensation layer, a liquid crystal cell, a second optical compensation layer, and a second polarizer in the stated order from a viewer side. The first optical compensation layer and the second optical compensation layer have a refractive index profile of nx>ny>nz, and a light transmittance (T05-06-2010
20100202051POLARIZING PLATE, OPTICAL FILM AND IMAGE DISPLAY - A polarizing plate of the present invention includes a stretched laminate that is a laminate including a base material layer and a hydrophilic polymer layer and has undergone a stretching process, and at least a dichroic substance is adsorbed to the hydrophilic polymer layer. The polarizing plate of the present invention can be prevented from curling even when the polarizer is reduced in thickness.08-12-2010

Patent applications by Takeharu Kitagawa, Osaka JP

Takeharu Kitagawa, Ibaraki-Shi JP

Patent application numberDescriptionPublished
20100165264LIQUID CRYSTAL PANEL AND LIQUID CRYSTAL DISPLAY - The present invention provides a liquid crystal panel that can provide a neutral display that is free from coloring in every direction. The liquid crystal panel includes a first polarizer 07-01-2010