Patents by Inventor Seiji Hachisuka
Seiji Hachisuka 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).
-
Publication number: 20070247849Abstract: A light source device includes a discharge tube, a reflector for reflecting a light radiated from the discharge tube, and support members for supporting the discharge tube to the reflector. The support member or the discharge tube is formed of a heat insulating structure so as to prevent a temperature drop of a portion of the discharge tube near electrodes thereof. By this arrangement, it is possible to prolong the operational life of the discharge tube.Type: ApplicationFiled: June 12, 2007Publication date: October 25, 2007Applicant: FUJITSU LIMITEDInventors: Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20070242458Abstract: A light source device includes a discharge tube, a reflector for reflecting a light radiated from the discharge tube, and support members for supporting the discharge tube to the reflector. The support member or the discharge tube is formed of a heat insulating structure so as to prevent a temperature drop of a portion of the discharge tube near electrodes thereof. By this arrangement, it is possible to prolong the operational life of the discharge tube.Type: ApplicationFiled: June 12, 2007Publication date: October 18, 2007Applicant: FUJITSU LIMITEDInventors: Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20070242480Abstract: A light source device includes a discharge tube, a reflector for reflecting a light radiated from the discharge tube, and support members for supporting the discharge tube to the reflector. The support member or the discharge tube is formed of a heat insulating structure so as to prevent a temperature drop of a portion of the discharge tube near electrodes thereof. By this arrangement, it is possible to prolong the operational life of the discharge tube.Type: ApplicationFiled: June 12, 2007Publication date: October 18, 2007Applicant: FUJITSU LIMITEDInventors: Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20070242484Abstract: A light source device includes a discharge tube, a reflector for reflecting a light radiated from the discharge tube, and support members for supporting the discharge tube to the reflector. The support member or the discharge tube is formed of a heat insulating structure so as to prevent a temperature drop of a portion of the discharge tube near electrodes thereof. By this arrangement, it is possible to prolong the operational life of the discharge tube.Type: ApplicationFiled: June 12, 2007Publication date: October 18, 2007Applicant: FUJITSU LIMITEDInventors: Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20070242482Abstract: A light source device includes a discharge tube, a reflector for reflecting a light radiated from the discharge tube, and support members for supporting the discharge tube to the reflector. The support member or the discharge tube is formed of a heat insulating structure so as to prevent a temperature drop of a portion of the discharge tube near electrodes thereof. By this arrangement, it is possible to prolong the operational life of the discharge tube.Type: ApplicationFiled: June 12, 2007Publication date: October 18, 2007Applicant: FUJITSU LIMITEDInventors: Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20070242481Abstract: A light source device includes a discharge tube, a reflector for reflecting a light radiated from the discharge tube, and support members for supporting the discharge tube to the reflector. The support member or the discharge tube is formed of a heat insulating structure so as to prevent a temperature drop of a portion of the discharge tube near electrodes thereof. By this arrangement, it is possible to prolong the operational life of the discharge tube.Type: ApplicationFiled: June 12, 2007Publication date: October 18, 2007Applicant: FUJITSU LIMITEDInventors: Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20070242483Abstract: A light source device includes a discharge tube, a reflector for reflecting a light radiated from the discharge tube, and support members for supporting the discharge tube to the reflector. The support member or the discharge tube is formed of a heat insulating structure so as to prevent a temperature drop of a portion of the discharge tube near electrodes thereof. By this arrangement, it is possible to prolong the operational life of the discharge tube.Type: ApplicationFiled: June 12, 2007Publication date: October 18, 2007Applicant: FUJITSU LIMITEDInventors: Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20070103163Abstract: An inverter system which converts DC input into AC output and supplies the AC output to a load such as an FL tube detects change in a circuit current due to anomaly such as discharge without contacting with a current route. Relating to an inverter which converts DC input into AC output and supplies the AC output to a load, change in a circuit current of the inverter is detected through the medium of magnetic flux change due to the change in the circuit current caused by discharge. For example, if change in a current occurs in the circuit current of the inverter by disconnection discharge or ground-fault discharge occurring in a current route including a load of the inverter, magnetic flux change occurs in circuit wiring and a space of a core gap of a transformer of the inverter. The change in the circuit current is detected through the medium of the magnetic flux change without contacting with the circuit wiring or the transformer.Type: ApplicationFiled: December 27, 2006Publication date: May 10, 2007Applicant: Fujitsu LimitedInventors: Seiji Hachisuka, Masaru Tanaka, Minoru Senba, Shuuichi Yadoori
-
Publication number: 20070103094Abstract: An inverter system which converts DC input into AC output and supplies the AC output to a load such as an FL tube detects change in a circuit current due to anomaly such as discharge without contacting with a current route. Relating to an inverter which converts DC input into AC output and supplies the AC output to a load, change in a circuit current of the inverter is detected through the medium of magnetic flux change due to the change in the circuit current caused by discharge. For example, if change in a current occurs in the circuit current of the inverter by disconnection discharge or ground-fault discharge occurring in a current route including a load of the inverter, magnetic flux change occurs in circuit wiring and a space of a core gap of a transformer of the inverter. The change in the circuit current is detected through the medium of the magnetic flux change without contacting with the circuit wiring or the transformer.Type: ApplicationFiled: December 27, 2006Publication date: May 10, 2007Applicant: Fujitsu LimitedInventors: Seiji Hachisuka, Masaru Tanaka, Minoru Senba, Shuuichi Yadoori
-
Patent number: 7169005Abstract: A display device includes a backlight having a discharge tube and a reflector. A heat conduction member is attached to the reflector in contact with the discharge tube, so that a part of the discharge tube is locally cooled by the heat conduction member. Liquid mercury is collected at a first position in the discharge tube, and the backlight is assembled so that the heat conduction member or other cooling device is located at the first position. Also, the display device includes an optical sheet having a diffusion portion having projections containing scattering material particles.Type: GrantFiled: June 30, 2005Date of Patent: January 30, 2007Assignee: Sharp Kabushiki KaishaInventors: Keiji Hayashi, Tetsuya Kobayashi, Tetsuya Hamada, Takeshi Gotoh, Toshihiro Suzuki, Mari Sugawara, Akio Sotokawa, Seiji Hachisuka
-
Patent number: 7070291Abstract: A light source device includes a discharge tube, a reflector for reflecting a light radiated from the discharge tube, and support members for supporting the discharge tube to the reflector. The support member or the discharge tube is formed of a heat insulating structure so as to prevent a temperature drop of a portion of the discharge tube near electrodes thereof. By this arrangement, it is possible to prolong the operational life of the discharge tube.Type: GrantFiled: September 17, 2003Date of Patent: July 4, 2006Assignee: Fujitsu LimitedInventors: Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20060098436Abstract: A light source device includes a discharge tube, a reflector for reflecting a light radiated from the discharge tube, and support members for supporting the discharge tube to the reflector. The support member or the discharge tube is formed of a heat insulating structure so as to prevent a temperature drop of a portion of the discharge tube near electrodes thereof. By this arrangement, it is possible to prolong the operational life of the discharge tube.Type: ApplicationFiled: December 23, 2005Publication date: May 11, 2006Inventors: Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20060097642Abstract: A light source device includes a discharge tube, a reflector for reflecting a light radiated from the discharge tube, and support members for supporting the discharge tube to the reflector. The support member or the discharge tube is formed of a heat insulating structure so as to prevent a temperature drop of a portion of the discharge tube near electrodes thereof. By this arrangement, it is possible to prolong the operational life of the discharge tube.Type: ApplicationFiled: December 23, 2005Publication date: May 11, 2006Inventors: Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20050255784Abstract: A display device includes a backlight having a discharge tube and a reflector. A heat conduction member is attached to the reflector in contact with the discharge tube, so that a part of the discharge tube is locally cooled by the heat conduction member. Liquid mercury is collected at a first position in the discharge tube, and the backlight is assembled so that the heat conduction member or other cooling device is located at the first position. Also, the display device includes an optical sheet having a diffusion portion having projections containing scattering material particles.Type: ApplicationFiled: June 30, 2005Publication date: November 17, 2005Inventors: Keiji Hayashi, Tetsuya Kobayashi, Tetsuya Hamada, Takeshi Gotoh, Toshihiro Suzuki, Mari Sugawara, Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20050242693Abstract: A display device includes a backlight having a discharge tube and a reflector. A heat conduction member is attached to the reflector in contact with the discharge tube, so that a part of the discharge tube is locally cooled by the heat conduction member. Liquid mercury is collected at a first position in the discharge tube, and the backlight is assembled so that the heat conduction member or other cooling device is located at the first position. Also, the display device includes an optical sheet having a diffusion portion having projections containing scattering material particles.Type: ApplicationFiled: June 30, 2005Publication date: November 3, 2005Inventors: Keiji Hayashi, Tetsuya Kobayashi, Tetsuya Hamada, Takeshi Gotoh, Toshihiro Suzuki, Mari Sugawara, Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20050236948Abstract: A display device includes a backlight having a discharge tube and a reflector. A heat conduction member is attached to the reflector in contact with the discharge tube, so that a part of the discharge tube is locally cooled by the heat conduction member. Liquid mercury is collected at a first position in the discharge tube, and the backlight is assembled so that the heat conduction member or other cooling device is located at the first position. Also, the display device includes an optical sheet having a diffusion portion having projections containing scattering material particles.Type: ApplicationFiled: June 30, 2005Publication date: October 27, 2005Inventors: Keiji Hayashi, Tetsuya Kobayashi, Tetsuya Hamada, Takeshi Gotoh, Toshihiro Suzuki, Mari Sugawara, Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20050179352Abstract: A display device includes a backlight having a discharge tube and a reflector. A heat conduction member is attached to the reflector in contact with the discharge tube, so that a part of the discharge tube is locally cooled by the heat conduction member. Liquid mercury is collected at a first position in the discharge tube, and the backlight is assembled so that the heat conduction member or other cooling device is located at the first position. Also, the display device includes an optical sheet having a diffusion portion having projections containing scattering material particles.Type: ApplicationFiled: April 6, 2005Publication date: August 18, 2005Inventors: Keiji Hayashi, Tetsuya Kobayashi, Tetsuya Hamada, Takeshi Gotoh, Toshihiro Suzuki, Mari Sugawara, Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20040062042Abstract: A light source device includes a discharge tube, a reflector for reflecting a light radiated from the discharge tube, and support members for supporting the discharge tube to the reflector. The support member or the discharge tube is formed of a heat insulating structure so as to prevent a temperature drop of a portion of the discharge tube near electrodes thereof. By this arrangement, it is possible to prolong the operational life of the discharge tube.Type: ApplicationFiled: September 17, 2003Publication date: April 1, 2004Applicant: FUJITSU LIMITEDInventors: Akio Sotokawa, Seiji Hachisuka
-
Publication number: 20040012381Abstract: An inverter system which converts DC input into AC output and supplies the AC output to a load such as an FL tube detects change in a circuit current due to anomaly such as discharge without contacting with a current route. Relating to an inverter which converts DC input into AC output and supplies the AC output to a load, change in a circuit current of the inverter is detected through the medium of magnetic flux change due to the change in the circuit current caused by discharge. For example, if change in a current occurs in the circuit current of the inverter by disconnection discharge or ground-fault discharge occurring in a current route including a load of the inverter, magnetic flux change occurs in circuit wiring and a space of a core gap of a transformer of the inverter. The change in the circuit current is detected through the medium of the magnetic flux change without contacting with the circuit wiring or the transformer.Type: ApplicationFiled: July 17, 2003Publication date: January 22, 2004Applicant: Fujitsu Limited, Kawasaki, JapanInventors: Seiji Hachisuka, Masaru Tanaka, Minoru Senba, Shuuichi Yadoori
-
Publication number: 20040012987Abstract: An anomaly detection circuit of an inverter detects behavioral anomaly such as disconnection discharge of a circuit wiring or discharge between high and low voltage parts with high accuracy and prevents continuation of behavioral anomaly of the device. The anomaly detection circuit of the inverter comprises a current change detector, a detection signal output part wherein the current change detector detects change in a circuit current flowing in circuit wirings of the inverter leading from the DC input to the load through the intermediary of magnetic flux change(&Dgr; &phgr;) which occurred to the circuit wiring while the detection signal output part outputs a detection signal (Vs) representing behavioral anomaly when the change in circuit current detected by the current change detecting part exceeds a predetermined level.Type: ApplicationFiled: February 20, 2003Publication date: January 22, 2004Applicant: Fujitsu LimitedInventors: Seiji Hachisuka, Masaru Tanaka