Patents by Inventor Masaru Ishiwa
Masaru Ishiwa 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: 7513661Abstract: A backlight unit has a light source, a reflection sheet, a light guide plate, an air space, and a diffuser, wherein the reflection sheet, the light guide plate, the air space, and the diffuser are overlaid in this order. The light source is configured to arrange individual light sources having different spectra or different light emission quantities near an incident plane of the light guide plate, and on a plane facing the reflection sheet of the light guide plate, scatter dots are disposed which take light propagating through the light guide plate out of the reflection sheet side. The backlight unit and a liquid crystal display device including the same have excellent display quality.Type: GrantFiled: January 31, 2008Date of Patent: April 7, 2009Assignee: Sharp Kabushiki KaishaInventors: Tetsuya Hamada, Toshihiro Suzuki, Masaru Ishiwa
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Patent number: 7488104Abstract: A backlight unit has a light source, a reflection sheet, a light guide plate, an air space, and a diffuser, wherein the reflection sheet, the light guide plate, the air space, and the diffuser are overlaid in this order. The light source is configured to arrange individual light sources having different spectra or different light emission quantities near an incident plane of the light guide plate, and on a plane facing the reflection sheet of the light guide plate, scatter dots are disposed which take light propagating through the light guide plate out of the reflection sheet side. The backlight unit and a liquid crystal display device including the same have excellent display quality.Type: GrantFiled: November 21, 2006Date of Patent: February 10, 2009Assignee: Sharp Kabushiki KaishaInventors: Tetsuya Hamada, Toshihiro Suzuki, Masaru Ishiwa
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Publication number: 20080129927Abstract: A backlight unit has a light source, a reflection sheet, a light guide plate, an air space, and a diffuser, wherein the reflection sheet, the light guide plate, the air space, and the diffuser are overlaid in this order. The light source is configured to arrange individual light sources having different spectra or different light emission quantities near an incident plane of the light guide plate, and on a plane facing the reflection sheet of the light guide plate, scatter dots are disposed which take light propagating through the light guide plate out of the reflection sheet side. The backlight unit and a liquid crystal display device including the same have excellent display quality.Type: ApplicationFiled: January 31, 2008Publication date: June 5, 2008Applicant: SHARP KABUSHIKI KAISHAInventors: Tetsuya HAMADA, Toshihiro SUZUKI, Masaru ISHIWA
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Patent number: 7359012Abstract: A liquid crystal display device efficiently uses light from light sources by positioning the light sources with respect to a light-guiding member for back lighting with minimized air gap therebetween. The light-guiding member provided on a backside of a liquid crystal panel. The light sources emit light toward a side surface of the light-guiding member. The light sources are aligned and fixed to a board that is fixed to the light-guiding member.Type: GrantFiled: December 28, 2004Date of Patent: April 15, 2008Assignee: Sharp Kabushiki KaishaInventors: Masaru Ishiwa, Tetsuya Hamada
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Publication number: 20070153548Abstract: A backlight unit has a light source, a reflection sheet, a light guide plate, an air space, and a diffuser, wherein the reflection sheet, the light guide plate, the air space, and the diffuser are overlaid in this order. The light source is configured to arrange individual light sources having different spectra or different light emission quantities near an incident plane of the light guide plate, and on a plane facing the reflection sheet of the light guide plate, scatter dots are disposed which take light propagating through the light guide plate out of the reflection sheet side. The backlight unit and a liquid crystal display device including the same have excellent display quality.Type: ApplicationFiled: November 21, 2006Publication date: July 5, 2007Applicant: Sharp Kabushiki KaishaInventors: Tetsuya HAMADA, Toshihiro SUZUKI, Masaru ISHIWA
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Publication number: 20060243948Abstract: The invention relates to a liquid crystal display used as a display unit of an electronic apparatus and provides a small liquid crystal display having a thin picture frame, the display having an excellent cooling function, high luminance, and high color reproducibility. The liquid crystal display includes a rear frame having an upstanding portion formed by bending an end of a longer side thereof and a heat sink which is in thermal contact with the rear frame. Thus, heat generated at LEDs can be efficiently radiated. The liquid crystal display also includes a liquid crystal display panel driving circuit which is divided into a data substrate and a control substrate. The liquid crystal display can be provided in a compact structure having a thin picture frame by disposing the data substrate on a side surface of the liquid crystal display and disposing the control substrate on the side of the heat sink.Type: ApplicationFiled: March 23, 2006Publication date: November 2, 2006Inventors: Masaru Ishiwa, Takayuki Eiraku
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Patent number: 7050127Abstract: A liquid crystal display device includes a liquid crystal panel, a flexible cable, an illuminating device and a unit cover, which accommodates the liquid crystal panel and the illuminating device. The unit cover is formed by a lower cover and an upper cover coupled to each other, the lower cover and the upper cover each having a lower or upper wall, a side wall, and a wall part bent from the side wall. The flexible cable extends between the wall part of the lower cover and the wall part of the upper cover from the inside to the outside of the unit cover. The flexible cable is interposed between, and held by, the wall part of the lower cover and the wall part of the upper cover.Type: GrantFiled: July 2, 2003Date of Patent: May 23, 2006Assignee: Sharp Kabushiki KaishaInventor: Masaru Ishiwa
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Publication number: 20060012731Abstract: A liquid crystal display device efficiently uses light from light sources by positioning the light sources with respect to a light-guiding member for back lighting with minimized air gap therebetween. The light-guiding member provided on a backside of a liquid crystal panel. The light sources emit light toward a side surface of the light-guiding member. The light sources are aligned and fixed to a board that is fixed to the light-guiding member.Type: ApplicationFiled: December 28, 2004Publication date: January 19, 2006Inventors: Masaru Ishiwa, Tetsuya Hamada
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Patent number: 6876422Abstract: A liquid-crystal display unit is provided. The liquid-crystal display unit comprises a first board having a signal line, a scanning line and a pixel electrode, a second board having a common electrode, a liquid-crystal layer provided between the first board and the second board, and a third board having at least one of a signal-line driver driving the signal line and a scanning-line driver driving the scanning line. The second board is positioned to oppose the first board. The third board is separated from the first board and the second board.Type: GrantFiled: August 15, 2001Date of Patent: April 5, 2005Assignee: Fujitsu Display Technologies CorporationInventors: Masaru Ishiwa, Susumu Okazaki
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Publication number: 20040012731Abstract: A liquid crystal display device includes a liquid crystal panel, a flexible cable, an illuminating device and a unit cover, which accommodates the liquid crystal panel and the illuminating device. The unit cover is formed by a lower cover and an upper cover coupled to each other, the lower cover and the upper cover each having a lower or upper wall, a side wall, and a wall part bent from the side wall. The flexible cable extends between the wall part of the lower cover and the wall part of the upper cover from the inside to the outside of the unit cover. The flexible cable is interposed between, and held by, the wall part of the lower cover and the wall part of the upper cover.Type: ApplicationFiled: July 2, 2003Publication date: January 22, 2004Applicant: FUJITSU DISPLAY TECHNOLOGIES CORPORATIONInventor: Masaru Ishiwa
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Patent number: 6513936Abstract: A projector includes a first housing, a second housing, and a sound insulating member. The first housing is provided with first heat-generating elements used for generating an image, first fans producing cooling airflows towards each one of the first heat-generating elements, and vents via which the cooling airflows heated by the first heat-generating elements are discharged. The second housing encloses the first housing, and has second fans discharging the cooling airflows outside the projector. The sound insulating member is provided on a path between the vents and the second fans so as to insulate sound produced by the first fans. The projector may be provided with a dust-proof member for the projecting lens.Type: GrantFiled: July 10, 2000Date of Patent: February 4, 2003Assignee: Fujitsu LimitedInventors: Masaru Ishiwa, Keiji Hayashi, Toshihiro Suzuki, Tetsuya Kobayashi, Tetsuya Hamada, Takeshi Gotoh, Mari Sugawara
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Publication number: 20020080314Abstract: A liquid-crystal display unit is provided. The liquid-crystal display unit comprises a first board having a signal line, a scanning line and a pixel electrode, a second board having a common electrode, a liquid-crystal layer provided between the first board and the second board, and a third board having at least one of a signal-line driver driving the signal line and a scanning-line driver driving the scanning line. The second board is positioned to oppose the first board. The third board is separated from the first board and the second board.Type: ApplicationFiled: August 15, 2001Publication date: June 27, 2002Applicant: FUJITSU LIMITEDInventors: Masaru Ishiwa, Susumu Okazaki
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Patent number: 5860719Abstract: A light source such as a metal halide lamp is effectively cooled in an optical apparatus such as a liquid crystal projector. In an optical apparatus which includes a concave mirror 11, a light emitting section 12 arranged in a concave portion of the concave mirror along the optical axis and a cooling structure for cooling a periphery of the light emitting section, the cooling structure is provided with a means for generating an air flow 4, the direction of which is approximately perpendicular to the optical axis of the concave mirror 11, and a means for generating an air flow 5 circulating into the concave portion of the concave mirror 11.Type: GrantFiled: May 31, 1995Date of Patent: January 19, 1999Assignee: Fujitsu LimitedInventors: Toshihiro Suzuki, Noriyuki Ohasi, Tsutomu Nagakari, Tetsuya Hamada, Hisashi Yamaguchi, Masaru Ishiwa
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Patent number: 5311227Abstract: A projection display device comprising three projection lenses arranged in a row in a side by side relationship and having respective optical axes extending toward a screen, and three liquid crystal display panels forming images of red, green and blue color lights, the liquid crystal display panels and the projection lenses being arranged to form sets individually. A mirror is arranged between the display element and the projection lens of at least one of the sets. Accordingly, one of the display elements is arranged so as to face in a first direction and the adjacent display element so as to face in a second direction. It is thus possible to reduce the distance between the adjacent projection lenses even if the size of the liquid crystal display panels is enlarged.Type: GrantFiled: January 6, 1993Date of Patent: May 10, 1994Assignee: Fujitsu, LimitedInventors: Akio Takayasu, Toshihiro Suzuki, Takeshi Goto, Tetsuya Kobayashi, Tetsuya Hamada, Yoshinori Tanaka, Takashi Kanno, Masaru Ishiwa, Makoto Goshima, Noriyuki Ohashi, Hisashi Yamaguchi