Patents by Inventor Kenichi Nakagawa
Kenichi Nakagawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7916392Abstract: A phase compensation element is disposed between a reflective type display element and a polarizing beam splitter. Composed of a crystal structure retardation layer functioning as a quarter-wave plate and an inclined-axis retardation layer functioning as an O-plate, the phase compensation element is aligned substantially parallel to a reflective surface of the reflective type display element. The inclined-axis retardation layer is made of inorganic material obliquely deposited on the crystal structure retardation layer. The inclined-axis retardation layer has a principal refractive index axis inclined at between 0° and 45° to a surface normal of the crystal structure retardation layer, and has a thickness not to increase haze of the phase compensation element.Type: GrantFiled: September 4, 2008Date of Patent: March 29, 2011Assignee: Fujifilm CorporationInventors: Kenichi Nakagawa, Hiroki Takahashi
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Publication number: 20100231835Abstract: A phase compensator having a biaxial birefringent component (40) is fabricated by oblique deposition of an inorganic material on a base plate (69). A polar angle of an evaporation path of the inorganic material is controlled in a predetermined angular range to a surface normal of the base plate (69). In the oblique deposition process, the base plate (69) is oscillated in a horizontal direction. The phase compensator is arranged such that its slow axis (L4) is perpendicular to a slow axis (L3) of tilt components (24a, 24b) in a liquid crystal panel (20), and that an index ellipsoid (41) is tilted in an opposite direction to a tilt direction of the tilt components (24a, 24b).Type: ApplicationFiled: September 18, 2008Publication date: September 16, 2010Applicant: Fujifilm CorporationInventors: Kenichi Nakagawa, Hiroki Takahashi, Taro Hashizume
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Patent number: 7773178Abstract: Red incident light is reflected on a mirror (19) and linearly polarized by a polarizer (26R). Linearly polarized incident light enters a transmissive liquid crystal device (11R), in which oblique incident light is changed into elliptically polarized light. A retardation compensator (27R) between the liquid crystal device (11R) and an analyzer (28R) has an inorganic form birefringence layer. The retardation compensator (27R) yields birefringence effect to change elliptical polarized light into linearly polarized light. Linearly polarized light from the retardation compensator (27R) can pass the analyzer (28R) without decreasing intensity, and enters a color recombining prism (24). The liquid crystal device (11R) may have the inorganic form birefringence layer. Retardation in green and blue light is also compensated in the same manner. Red, green and blue image light, mixed in the color recombining prism (24), is projected onto a screen 3 by a projection lens system (25).Type: GrantFiled: January 24, 2008Date of Patent: August 10, 2010Assignee: Fujifilm CorporationInventor: Kenichi Nakagawa
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Patent number: 7764343Abstract: A retardation compensation element (32, 32a) has a first optical anisotropic layer (42) that functions as a negative C-plate, and a second and a third optical anisotropic layers (43, 44) that function as positive O-plates. VA mode liquid crystal molecules (37) tilt at an azimuth angle of 45 degrees and a polar angle of 5 degrees when no voltage is applied thereto. The second and third optical anisotropic layers have optical axes respectively at an angle of ?105 degrees and +105 degrees from the tilt direction of the liquid crystal molecule. The first optical anisotropic layer (42) compensates the retardation of light that enters a liquid crystal layer (38) at an oblique angle while the second and third optical anisotropic layers (43, 44) compensate the retardation of light that enters the liquid crystal layer at a right angle.Type: GrantFiled: July 3, 2006Date of Patent: July 27, 2010Assignee: FUJIFILM CorporationInventor: Kenichi Nakagawa
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Patent number: 7755729Abstract: A polarization azimuth compensation layer (31) is effective in aligning a polarization plane of light obliquely entering an incident-side polarizing plate (30) with a polarization plane of light entering the incident-side polarizing plate (30) in a direction of a normal line. A retardation compensation layer (41) is disposed nearer a liquid crystal layer (34) than a microlens array (40) diffracting part of incident light, to compensate a phase difference due to the liquid crystal layer (34). Diffracted light caused by the microlens array (40) and a TFT circuit pattern (46) enters a polarization azimuth compensation layer (36). The polarization azimuth compensation layer (36) prevents leakage of light by aligning a polarization plane of the diffracted light to be parallel to an absorption axis of an exit-side polarizing plate (37).Type: GrantFiled: July 3, 2006Date of Patent: July 13, 2010Assignee: FUJIFILM CorporationInventor: Kenichi Nakagawa
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Publication number: 20100026918Abstract: A retardation compensation element (56) is composed of a C-plate (86) and an O-plate (85). The O-plate (85) is a biaxial birefringent medium made of an obliquely deposited organic material, and has a fast axis (L6) parallel to the orthographic projection of a deposition direction (96) onto the surface of the O-plate (85). Between a liquid crystal display device (51) and an analyzer (68), the O-plate (85) is arranged such that the fast axis (L6) and a tilt direction (L8) of liquid crystal molecules (75) parallel to each other, and that the deposition direction (96) and the tilt direction (L8) face the opposite direction. The C-plate (86) is disposed above the O-plate (85) between the liquid crystal display device (51) and the analyzer (68).Type: ApplicationFiled: December 26, 2007Publication date: February 4, 2010Applicant: Fujifilm CorporationInventors: Kenichi Nakagawa, Hiroki Takahashi
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Publication number: 20090290108Abstract: A retardation compensation element (56) is composed of a C-plate (85) and an O-plate (86). The O-plate (86) is a biaxial birefringent medium made of an obliquely deposited organic material. A fast axis (L6) of the O-plate (86) is parallel to the orthographic projection of a deposition direction (96) onto the surface of the O-plate (86). Between a liquid crystal display device (51) and a polarization beam splitter (48), the O-plate (86) is arranged such that the fast axis (L6) and a tilt direction (L8) of liquid crystal molecules (75) are parallel to each other, and that the deposition direction (96) and the tilt direction (L8) face the opposite direction with respect to a Z2 axis. The C-plate (86) is disposed together with the O-plate (85) between the liquid crystal display device (51) and the polarization beam splitter (48).Type: ApplicationFiled: December 26, 2007Publication date: November 26, 2009Applicant: FUJIFILM CORPORATIONInventors: Kenichi Nakagawa, Taro Hashizume, Hiroki Takahashi
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Patent number: 7583340Abstract: A transparent base plate supports a first compensating layer, which is adapted to compensate for a phase difference due to liquid crystal molecules having undergone normal orientation in a liquid crystal layer of a TN liquid crystal display device, and second compensating layers, which are adapted to compensate for the phase difference due to the liquid crystal molecules having undergone hybrid orientation in the liquid crystal layer. Each of the second compensating layers is constituted of one of oblique incidence vacuum deposited films, which are formed on opposite surfaces of the base plate with oblique incidence vacuum evaporation of an inorganic material. An azimuthal angle and/or a polar angle of a direction of vacuum evaporation with respect to a plane of vacuum evaporation is set to be different between the second compensating layers.Type: GrantFiled: October 21, 2005Date of Patent: September 1, 2009Assignee: FUJIFILM CorporationInventors: Takamichi Fujii, Kenichi Nakagawa
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Patent number: 7554635Abstract: Red incident light is reflected on a mirror (19) and linearly polarized by a polarizer (26R). Linearly polarized incident light enters a transmissive liquid crystal device (11R), in which oblique incident light is changed into elliptically polarized light. A retardation compensator (27R) between the liquid crystal device (11R) and an analyzer (28R) has an inorganic form birefringence layer. The retardation compensator (27R) yields birefringence effect to change elliptical polarized light into linearly polarized light. Linearly polarized light from the retardation compensator (27R) can pass the analyzer (28R) without decreasing intensity, and enters a color recombining prism (24). The liquid crystal device (11R) may have the inorganic form birefringence layer. Retardation in green and blue light is also compensated in the same manner. Red, green and blue image light, mixed in the color recombining prism (24), is projected onto a screen 3 by a projection lens system (25).Type: GrantFiled: July 16, 2003Date of Patent: June 30, 2009Assignee: Fujifilm CorporationInventor: Kenichi Nakagawa
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Publication number: 20090128718Abstract: A retardation compensation element (32, 32a) has a first optical anisotropic layer (42) that functions as a negative C-plate, and a second and a third optical anisotropic layers (43, 44) that function as positive O-plates. VA mode liquid crystal molecules (37) tilt at an azimuth angle of 45 degrees and a polar angle of 5 degrees when no voltage is applied thereto. The second and third optical anisotropic layers have optical axes respectively at an angle of ?105 degrees and +105 degrees from the tilt direction of the liquid crystal molecule. The first optical anisotropic layer (42) compensates the retardation of light that enters a liquid crystal layer (38) at an oblique angle while the second and third optical anisotropic layers (43, 44) compensate the retardation of light that enters the liquid crystal layer at a right angle.Type: ApplicationFiled: July 3, 2006Publication date: May 21, 2009Applicant: FUJIFILM CORPORATIONInventor: Kenichi Nakagawa
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Publication number: 20090115941Abstract: A polarization azimuth compensation layer (31) is effective in aligning a polarization plane of light obliquely entering an incident-side polarizing plate (30) with a polarization plane of light entering the incident-side polarizing plate (30) in a direction of a normal line. A retardation compensation layer (41) is disposed nearer a liquid crystal layer (34) than a microlens array (40) diffracting part of incident light, to compensate a phase difference due to the liquid crystal layer (34). Diffracted light caused by the microlens array (40) and a TFT circuit pattern (46) enters a polarization azimuth compensation layer (36). The polarization azimuth compensation layer (36) prevents leakage of light by aligning a polarization plane of the diffracted light to be parallel to an absorption axis of an exit-side polarizing plate (37).Type: ApplicationFiled: July 3, 2006Publication date: May 7, 2009Applicant: FUJIFILM CORPORATIONInventor: Kenichi Nakagawa
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Publication number: 20090067049Abstract: A phase compensation element is disposed between a reflective type display element and a polarizing beam splitter. Composed of a crystal structure retardation layer functioning as a quarter-wave plate and an inclined-axis retardation layer functioning as an O-plate, the phase compensation element is aligned substantially parallel to a reflective surface of the reflective type display element. The inclined-axis retardation layer is made of inorganic material obliquely deposited on the crystal structure retardation layer. The inclined-axis retardation layer has a principal refractive index axis inclined at between 0° and 45° to a surface normal of the crystal structure retardation layer, and has a thickness not to increase haze of the phase compensation element.Type: ApplicationFiled: September 4, 2008Publication date: March 12, 2009Applicant: FUJIFILM CorporationInventors: Kenichi NAKAGAWA, Hiroki Takahashi
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Publication number: 20090040400Abstract: A liquid crystal display panel (11R) is provided with, from a light source side, a MLA substrate (31) having a microlens array (37), an opposed substrate (32) having transparent common electrodes (41) formed thereon, a liquid crystal layer (33), and a TFT substrate (34) having transparent pixel electrodes associated with each pixel. The microlens array focuses the incident light onto the corresponding pixel electrodes. A light source side surface of the opposed substrate is provided with a retardation compensation layer (39). Since the light passes through the retardation compensation layer and the liquid crystal layer at the same angle even if the light diffracts and diffuses on the microlens array, leakage of light is prevented.Type: ApplicationFiled: July 3, 2006Publication date: February 12, 2009Applicant: FUJIFILM CORPORATIONInventors: Kenichi Nakagawa, Makoto Yamada, Toshitaka Ninomiya, Koichi Sugihara, Shintaro Washizu, Masao Sato
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Publication number: 20090009701Abstract: The light diffusing plate includes a light-transmissive support, a diffusing layer having light-transmissive spheres, and a light-sensitive color forming material interposed between the support and the diffusing layer, the light-sensitive color forming material containing a positive-acting diazo light- and heat-sensitive material or a positive-acting silver halide light-sensitive emulsion, or a negative-acting light-sensitive color forming material in the side contacting the light-transmissive spheres and a positive-acting light-sensitive color forming material in the side of the support, the light-sensitive color forming material being developed to take on color after generally parallel light is launched from a side where the diffusing layer is provided. The display apparatus makes use of the diffusing plate.Type: ApplicationFiled: June 30, 2008Publication date: January 8, 2009Inventors: Akira YAMAGUCHI, Kenichi Nakagawa, Sumitaka Tatsuta, Toshitaka Agano
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Patent number: 7468769Abstract: A form birefringence to compensate the phase retardation caused by a liquid crystal device has a retardation compensation film that is composed of alternately deposited high and low refractive index layers. The retardation compensation film is provided in at least one of the incident side and the emanation side of the liquid crystal device. The birefringence value ?n and the total thickness d of the retardation compensation film are adjusted such that the retardation of the retardation compensation film agrees with the retardation of the liquid crystal device at least at one wavelength in the visible band.Type: GrantFiled: December 29, 2003Date of Patent: December 23, 2008Assignee: Fujifilm CorporationInventor: Kenichi Nakagawa
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Publication number: 20080143893Abstract: Red incident light is reflected on a mirror (19) and linearly polarized by a polarizer (26R). Linearly polarized incident light enters a transmissive liquid crystal device (11R), in which oblique incident light is changed into elliptically polarized light. A retardation compensator (27R) between the liquid crystal device (11R) and an analyzer (28R) has an inorganic form birefringence layer. The retardation compensator (27R) yields birefringence effect to change elliptical polarized light into linearly polarized light. Linearly polarized light from the retardation compensator (27R) can pass the analyzer (28R) without decreasing intensity, and enters a color recombining prism (24). The liquid crystal device (11R) may have the inorganic form birefringence layer. Retardation in green and blue light is also compensated in the same manner. Red, green and blue image light, mixed in the color recombining prism (24), is projected onto a screen 3 by a projection lens system (25).Type: ApplicationFiled: January 24, 2008Publication date: June 19, 2008Applicant: FujiFilm CorporationInventor: Kenichi Nakagawa
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Publication number: 20070258029Abstract: On a transparent glass substrate (10), a first phase difference compensating layer (12) and a second phase difference compensating layer (14), which are formed of inorganic material, are provided. The first phase difference compensating layer (12) includes a stacked two kinds of deposition films sufficiently thinner than reference wavelength, one has high refraction index, and the other has low refraction index, to be a negative C-plate. The second phase difference compensating layer (14) includes at least two oblique deposition films, to be a positive O-plate. The first phase difference compensating layer (12) compensates a phase difference from liquid crystal molecules in a vertical orientation in a liquid crystal layer, and the second phase difference compensating layer (14) compensates a phase difference from liquid crystal molecules in a hybrid orientation in the liquid crystal layer.Type: ApplicationFiled: December 14, 2005Publication date: November 8, 2007Applicant: FUJIFILM CorporationInventors: Kenichi Nakagawa, Takamichi Fujii
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Publication number: 20070182894Abstract: To provide an optical compensatory element that can optically compensate a liquid crystal layer under a condition for displaying black more precisely and prevent light leakage at a wide viewing angle, and to provide a liquid crystal display and a liquid crystal projector using the optical compensatory element, an optical compensatory element includes a support, at least one first optically anisotropic layer derived from at least one of inorganic materials and arranged on or above at least one side of the support, and a second optically anisotropic layer derived from at least one of polymerizable liquid crystal compounds and being arranged on or above at least one side of the support.Type: ApplicationFiled: March 7, 2005Publication date: August 9, 2007Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Kenichi Nakagawa, Masao Sato, Yosuke Takeuchi, Shintaro Washizu
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Patent number: 7174505Abstract: A relay server computer adds control code to background contents to generate web data for display engagement, and sends the generated web data to every client computer. The control code becomes a controller by executed on the client. When an object such as image is pasted on the background contents displayed in an engaged fashion, the controller detects the event occurred by pasting, and sends the information indicating the event to the other clients via relay server. Consequently, the screen with the object being pasted is displayed in an engaged fashion among all clients. The object can be moved, modified, or deleted.Type: GrantFiled: March 29, 2002Date of Patent: February 6, 2007Assignee: Fujitsu LimitedInventors: Kenichi Nakagawa, Keisuke Katada
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Publication number: 20060260747Abstract: According to the present invention, there is disclosed a gas introduction system for temperature adjustment comprising passing a gas whose temperature is managed for the temperature adjustment of an object to be processed between a mounting surface of a mounting base for holding the object to be processed under vacuum and a back surface of the object to be processed through a gas supply line, controlling a flow rate adjustment valve by control means based on a measured pressure of the gas supply line measured by a manometer, and adjusting a gas flow rate to the gas supply line so as to obtain a set pressure, so that the gas pressure can be set to a predetermined value in a short time, and the system is miniaturized with little waste of the gas.Type: ApplicationFiled: August 1, 2006Publication date: November 23, 2006Inventors: Jun Hirose, Shinji Hamamoto, Hiroshi Koizumi, Kenichi Nakagawa