Patents by Inventor Tsutomu Kanatsu
Tsutomu Kanatsu 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: 7134776Abstract: A direct backlight includes a plastic spacer pin. The spacer pin is formed of a semispherical portion and a conical frustum portion. The spacer pin is disposed such that the thicker end of the conical frustum portion is coupled to the bottom surface of the chassis, with the semispherical portion placed to face a diffuser plate. The radius of curvature of the tip of the semispherical portion is 0.3 mm to 1 mm. The diameter of the end of the conical frustum portion on the semispherical portion side is 1.1 mm to 2 mm. The ratio (L/B) is less than 5 where L is the length of the spacer pin and B is the diameter of the thicker end of the conical frustum portion.Type: GrantFiled: January 24, 2005Date of Patent: November 14, 2006Assignee: NEC LCD CorporationInventor: Tsutomu Kanatsu
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Patent number: 7057678Abstract: In a liquid crystal display device there are provided a liquid crystal panel, a chassis, a side reflector, an optical sheet, a diffuser, and a bottom reflector. In the side reflector are provided plural lamp support bases in a row in a direction parallel to the surface of the liquid crystal panel. The lamp support bases are arranged so as to hold low pressure-side end portions of lamps respectively. A return substrate extending in the arranged direction of the lamps is mounted to the lamp support bases on the side opposed to the liquid crystal panel. Further, lead wires are drawn out toward the return substrate from low pressure-side end portions of the lamps, then are allowed to pass through the lamp support bases and are connected to the return substrate. With this arrangement, it is possible to narrow a picture frame area.Type: GrantFiled: April 16, 2002Date of Patent: June 6, 2006Assignee: NEC LCD Technologies, Ltd.Inventors: Hiroshi Ishida, Tsutomu Kanatsu
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Patent number: 6995814Abstract: In a flat panel display device, in which a display panel 1 loosely fitted on a main surface of a chassis 4 and circuit substrates held in hook portions provided on side surfaces of the chassis are connected each other through TCP's by bending the latter TCP's, and a method for manufacturing the same device, a main slit for a rounded portion of each TCP is formed in a rounded portion of the TCP and an auxiliary sub slit is also formed adjacent to the main slit. In order to reduce the peeling force exerted on connecting/fixing portions between the TCP's and the display panel, the circuit substrate is pulled up by bending the main and sub slits and then returning the sub slit to a flat state to insert the circuit substrate into the hook portions.Type: GrantFiled: September 7, 2004Date of Patent: February 7, 2006Assignee: NEC LCD Technologies, Ltd.Inventor: Tsutomu Kanatsu
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Publication number: 20050162869Abstract: A direct backlight includes a plastic spacer pin. The spacer pin is formed of a semispherical portion and a conical frustum portion. The spacer pin is disposed such that the thicker end of the conical frustum portion is coupled to the bottom surface of the chassis, with the semispherical portion placed to face a diffuser plate. The radius of curvature of the tip of the semispherical portion is 0.3 mm to 1 mm. The diameter of the end of the conical frustum portion on the semispherical portion side is 1.1 mm to 2 mm. The ratio (L/B) is less than 5 where L is the length of the spacer pin and B is the diameter of the thicker end of the conical frustum portion.Type: ApplicationFiled: January 24, 2005Publication date: July 28, 2005Applicant: NEC LCD TECHNOLOGIES, LTD.Inventor: Tsutomu Kanatsu
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Patent number: 6867825Abstract: In a liquid crystal display device there are provided a frame, a liquid crystal panel, and a diffuser, the liquid crystal panel and the diffuser being supported by a frame formed of a white resin. The frame is composed of two short-side members and two long-side members. The short-side members are provided with reflectors respectively, and lamp mounting members formed of rubber are fitted with the reflectors to support end portions of lamps. The lamp mounting members are mounted to a back reflector to fix the lamps to the back reflector.Type: GrantFiled: April 16, 2002Date of Patent: March 15, 2005Assignee: NEC LCD Technologies, Ltd.Inventors: Tsutomu Kanatsu, Hiroshi Ishida
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Publication number: 20050030466Abstract: In a flat panel display device, in which a display panel 1 loosely fitted on a main surface of a chassis 4 and circuit substrates held in hook portions provided on side surfaces of the chassis are connected each other through TCP's by bending the latter TCP's, and a method for manufacturing the same device, a main slit for a rounded portion of each TCP is formed in a rounded portion of the TCP and an auxiliary sub slit is also formed adjacent to the main slit. In order to reduce the peeling force exerted on connecting/fixing portions between the TCP's and the display panel, the circuit substrate is pulled up by bending the main and sub slits and then returning the sub slit to a flat state to insert the circuit substrate into the hook portions.Type: ApplicationFiled: September 7, 2004Publication date: February 10, 2005Inventor: Tsutomu Kanatsu
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Patent number: 6819371Abstract: In a flat panel display device, in which a display panel 1 loosely fitted on a main surface of a chassis 4 and circuit substrates held in hook portions provided on side surfaces of the chassis are connected each other through TCP's by bending the latter TCP's, and a method for manufacturing the same device, a main slit for a rounded portion of each TCP is formed in a rounded portion of the TCP and an auxiliary sub slit is also formed adjacent to the main slit. In order to reduce the peeling force exerted on connecting/fixing portions between the TCP's and the display panel, the circuit substrate is pulled up by bending the main and sub slits and then returning the sub slit to a flat state to insert the circuit substrate into the hook portions.Type: GrantFiled: July 9, 2003Date of Patent: November 16, 2004Assignee: NEC LCD Technologies, Ltd.Inventor: Tsutomu Kanatsu
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Patent number: 6693682Abstract: A light emission surface having a substantially single surface in a liquid crystal display 1 is designed so as to be opposite to a rear of a liquid crystal panel 2 or a rear of an optical member 5 through an air layer. Thus, it is possible to provide a liquid crystal display that can prevent a heat accumulation in a liquid crystal panel without any drop of brightness, and a light source device used in the liquid crystal display.Type: GrantFiled: March 14, 2001Date of Patent: February 17, 2004Assignee: NEC LCD Technologies, Ltd.Inventors: Fumihiko Fujishiro, Tsutomu Kanatsu, Fumio Hasegawa, Shin-Ichirou Ono, Hirokazu Fukuyoshi
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Publication number: 20040012746Abstract: In a flat panel display device, in which a display panel 1 loosely fitted on a main surface of a chassis 4 and circuit substrates held in hook portions provided on side surfaces of the chassis are connected each other through TCP's by bending the latter TCP's, and a method for manufacturing the same device, a main slit for a rounded portion of each TCP is formed in a rounded portion of the TCP and an auxiliary sub slit is also formed adjacent to the main slit. In order to reduce the peeling force exerted on connecting/fixing portions between the TCP's and the display panel, the circuit substrate is pulled up by bending the main and sub slits and then returning the sub slit to a flat state to insert the circuit substrate into the hook portions.Type: ApplicationFiled: July 9, 2003Publication date: January 22, 2004Inventor: Tsutomu Kanatsu
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Patent number: 6661480Abstract: A light emission surface having a substantially single surface in a liquid crystal display 1 is designed so as to be opposite to a rear of a liquid crystal panel 2 or a rear of an optical member 5 through an air layer. Thus, it is possible to provide a liquid crystal display that can prevent a heat accumulation in a liquid crystal panel without any drop of brightness, and a light source device used in the liquid-crystal display.Type: GrantFiled: November 21, 2002Date of Patent: December 9, 2003Assignee: NEC LCD Technologies, Ltd.Inventors: Fumihiko Fujishiro, Tsutomu Kanatsu, Fumio Hasegawa, Shin-Ichirou Ono, Hirokazu Fukuyoshi
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Patent number: 6636281Abstract: In a flat panel display device, in which a display panel 1 loosely fitted on a main surface of a chassis 4 and circuit substrates held in hook portions provided on side surfaces of the chassis are connected each other through TCP's by bending the latter TCP's, and a method for manufacturing the same device, a main slit for a rounded portion of each TCP is formed in a rounded portion of the TCP and an auxiliary sub slit is also formed adjacent to the main slit. In order to reduce the peeling force exerted on connecting/fixing portions between the TCP's and the display panel, the circuit substrate is pulled up by bending the main and sub slits and then returning the sub slit to a flat state to insert the circuit substrate into the hook portions.Type: GrantFiled: July 11, 2000Date of Patent: October 21, 2003Assignee: NEC LCD Technologies, Ltd.Inventor: Tsutomu Kanatsu
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Patent number: 6583556Abstract: A flat-type fluorescent lamp for LCD devices is provided, which makes it possible to narrow the picture-frame area and to widen the emission area and which facilitates their wiring, connection and assembly operations.Type: GrantFiled: November 28, 2001Date of Patent: June 24, 2003Assignee: NEC LCD Technologies, Ltd.Inventors: Toshiya Oishi, Fumihiko Fujishiro, Tsutomu Kanatsu
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Publication number: 20030095216Abstract: A light emission surface having a substantially single surface in a liquid crystal display 1 is designed so as to be opposite to a rear of a liquid crystal panel 2 or a rear of an optical member 5 through an air layer. Thus, it is possible to provide a liquid crystal display that can prevent a heat accumulation in a liquid crystal panel without any drop of brightness, and a light source device used in the liquid crystal display.Type: ApplicationFiled: November 21, 2002Publication date: May 22, 2003Applicant: NEC CorporationInventors: Fumihiko Fujishiro, Tsutomu Kanatsu, Fumio Hasegawa, Shin-Ichirou Ono, Hirokazu Fukuyoshi
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Publication number: 20020149713Abstract: In a liquid crystal display device there are provided a liquid crystal panel, a chassis, a side reflector, an optical sheet, a diffuser, and a bottom reflector. In the side reflector are provided plural lamp support bases in a row in a direction parallel to the surface of the liquid crystal panel. The lamp support bases are arranged so as to hold low pressure-side end portions of lamps respectively. A return substrate extending in the arranged direction of the lamps is mounted to the lamp support bases on the side opposed to the liquid crystal panel. Further, lead wires are drawn out toward the return substrate from low pressure-side end portions of the lamps, then are allowed to pass through the lamp support bases and are connected to the return substrate. With this arrangement, it is possible to narrow a picture frame area.Type: ApplicationFiled: April 16, 2002Publication date: October 17, 2002Applicant: NEC CORPORATIONInventors: Hiroshi Ishida, Tsutomu Kanatsu
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Publication number: 20020149719Abstract: In a liquid crystal display device there are provided a frame, a liquid crystal panel, and a diffuser, the liquid crystal panel and the diffuser being supported by a frame formed of a white resin. The frame is composed of two short-side members and two long-side members. The short-side members are provided with reflectors respectively, and lamp mounting members formed of rubber are fitted with the reflectors to support end portions of lamps. The lamp mounting members are mounted to a back reflector to fix the lamps to the back reflector.Type: ApplicationFiled: April 16, 2002Publication date: October 17, 2002Applicant: NEC CORPORATIONInventors: Tsutomu Kanatsu, Hiroshi Ishida
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Publication number: 20020063514Abstract: A flat-type fluorescent lamp for LCD devices is provided, which makes it possible to narrow the picture-frame area and to widen the emission area and which facilitates their wiring, connection and assembly operations.Type: ApplicationFiled: November 28, 2001Publication date: May 30, 2002Applicant: NEC CORPORATIONInventors: Toshiya Oishi, Fumihiko Fujishiro, Tsutomu Kanatsu
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Publication number: 20010024250Abstract: A light emission surface having a substantially single surface in a liquid crystal display 1 is designed so as to be opposite to a rear of a liquid crystal panel 2 or a rear of an optical member 5 through an air layer. Thus, it is possible to provide a liquid crystal display that can prevent a heat accumulation in a liquid crystal panel without any drop of brightness, and a light source device used in the liquid crystal display.Type: ApplicationFiled: March 14, 2001Publication date: September 27, 2001Inventors: Fumihiko Fujishiro, Tsutomu Kanatsu, Fumio Hasegawa, Shin-Ichirou Ono, Hirokazu Fukuyoshi
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Patent number: 6288761Abstract: A novel structure for the backlight of an LCD is provided, by which the frame portion of the screen can be further narrowed and the weight of the LCD can be reduced. In the backlight arranged in the display area corresponding to the display section of the LCD, the cold cathode tube, disposed along a part of a circumferential area of the display section, is surrounded by a light-introducing plate made of a light-transmitting material and a reflector, and an electro-luminescence lamp is provided between the display section and the reflector.Type: GrantFiled: July 13, 1999Date of Patent: September 11, 2001Assignee: NEC CorporationInventor: Tsutomu Kanatsu