Patents by Inventor Tetsuya Karaki
Tetsuya Karaki 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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Publication number: 20130239885Abstract: Provided is a film formation mask capable of preventing slit-like openings from being closed by vibrations so as to form a highly precise patterned film with stability. In a film formation mask formed by providing multiple slit-like openings in a metal foil, the shape of the opening of at least one end of the slit-like openings is asymmetrical with respect to a center line of the width direction of the slit-like openings.Type: ApplicationFiled: May 8, 2013Publication date: September 19, 2013Applicant: Canon Kabushiki KaishaInventor: Tetsuya KARAKI
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Patent number: 8500505Abstract: Provided is a film formation mask capable of preventing slit-like openings from being closed by vibrations so as to form a highly precise patterned film with stability. In a film formation mask formed by providing multiple slit-like openings in a metal foil, the shape of the opening of at least one end of the slit-like openings is asymmetrical with respect to a center line of the width direction of the slit-like openings.Type: GrantFiled: August 3, 2011Date of Patent: August 6, 2013Assignee: Canon Kabushiki KaishaInventor: Tetsuya Karaki
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Patent number: 8460047Abstract: Provided is a film formation mask capable of preventing slit-like openings from being closed by vibrations so as to form a highly precise patterned film with stability. In a film formation mask formed by providing multiple slit-like openings in a metal foil, the shape of the opening of at least one end of the slit-like openings is asymmetrical with respect to a center line of the width direction of the slit-like openings.Type: GrantFiled: August 3, 2011Date of Patent: June 11, 2013Assignee: Canon Kabushiki KaishaInventor: Tetsuya Karaki
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Publication number: 20130040047Abstract: Provided is a method for manufacturing an EL device formed in each of a plurality of sections arrayed in matrix form on a substrate, the method including the step of depositing an evaporant onto the substrate through a mask held between the substrate and an evaporation source opposite the substrate, the mask having deposition patterns of all the sections in a column direction as openings, wherein the step is repeated while moving the substrate in a row direction of the sections one column at a time.Type: ApplicationFiled: August 7, 2012Publication date: February 14, 2013Applicant: CANON KABUSHIKI KAISHAInventor: Tetsuya Karaki
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Patent number: 8159117Abstract: There are provided a display apparatus that can display an image having higher resolution feeling while solving the problem of patterning precision for sub pixels which is difficult to obtain in production, and a production method thereof.Type: GrantFiled: January 29, 2008Date of Patent: April 17, 2012Assignee: Canon Kabushiki KaishaInventors: Tetsuya Karaki, Hideo Mori, Ryuichiro Isobe
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Publication number: 20120064651Abstract: Provided is a method for manufacturing an organic electroluminescent display apparatus that includes a substrate and a plurality of pixels each including two or more types of sub-pixels, in which the pixels are arranged in a display area of the substrate, and, among the sub-pixels, one type of sub-pixels are specified sub-pixels provided at certain intervals. The specified sub-pixels are formed by selectively forming the (2n-1)th specified sub-pixels (wherein n represents an integer of 1 or more) numbered from a side end of the display area using a mask having openings at positions corresponding to the (2n-1)th specified sub-pixels numbered from the side end, and selectively forming the (2n)th specified sub-pixels numbered from the side end using a mask having openings at positions corresponding to the (2n)th specified sub-pixels numbered from the side end.Type: ApplicationFiled: May 13, 2010Publication date: March 15, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Atsushi Shiozaki, Toshihiko Mimura, Noriyuki Kaifu, Katsunori Oya, Tetsuya Karaki
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Publication number: 20120045958Abstract: Provided is a film formation mask capable of preventing slit-like openings from being closed by vibrations so as to form a highly precise patterned film with stability. In a film formation mask formed by providing multiple slit-like openings in a metal foil, the shape of the opening of at least one end of the slit-like openings is asymmetrical with respect to a center line of the width direction of the slit-like openings.Type: ApplicationFiled: August 3, 2011Publication date: February 23, 2012Applicant: CANON KABUSHIKI KAISHAInventor: Tetsuya Karaki
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Publication number: 20110239941Abstract: Provided is an evaporation apparatus which reduces deformation of a mask, improves adhesion between a substrate and an evaporation mask, and improves accuracy of dividing a region on which a film is to be formed and a region on which the film is not to be formed. The evaporation apparatus includes a pressing mechanism for pressing a film forming substrate disposed on an evaporation mask including a magnetic material against the evaporation mask. The pressing mechanism includes a magnet for attracting the mask toward at least a corner portion of the film forming substrate.Type: ApplicationFiled: March 29, 2011Publication date: October 6, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Yoshiyuki Nakagawa, Masanori Yoshida, Masamichi Masuda, Junji Ohyama, Akio Koganei, Naotoshi Miyamachi, Hirohito Yamaguchi, Tetsuya Karaki, Nobutaka Ukigaya, Toshiaki Yoshikawa
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Publication number: 20100039011Abstract: There are provided a display apparatus that can display an image having higher resolution feeling while solving the problem of patterning precision for sub pixels which is difficult to obtain in production, and a production method thereof.Type: ApplicationFiled: January 29, 2008Publication date: February 18, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Tetsuya Karaki, Hideo Mori, Ryuichiro Isobe
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Patent number: 7060406Abstract: A light-receiving member comprising a conductive substrate, and formed superposingly thereon a photosensitive layer and a surface protective layer in order. The light-receiving member has a surface roughness Ra of from 15 nm to 100 nm. Also disclosed is an image-forming apparatus having such a light-receiving member, and an image-forming method of rendering visible an electrostatic pattern formed on the light-receiving member. The light-receiving member promises stable formation of images over a long period of time.Type: GrantFiled: May 2, 2003Date of Patent: June 13, 2006Assignee: Canon Kabushiki KaishaInventors: Kunimasa Kawamura, Shigenori Ueda, Toshiyuki Ehara, Junichiro Hashizume, Ryuji Okamura, Masaya Kawada, Tetsuya Karaki, Hironori Ohwaki
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Patent number: 6846600Abstract: A process for producing an electrophotographic photosensitive member comprising the steps of depositing a non-single crystal material composed basically of silicon atoms, on a cylindrical substrate in a deposition chamber, thereafter once taking the substrate with film out of the deposition chamber, then returning it to the deposition chamber, and thereafter again depositing thereon a non-single-crystal material composed basically of carbon atoms. In another embodiment, the process comprises the steps of depositing on a cylindrical substrate a photoconductive layer formed of a non-single crystal material, subjecting to surface processing the deposited film having protrusions present at its surface, and depositing on the processed surface a surface protective layer formed of a non-single-crystal material. Also disclosed is the electrophotographic photosensitive member thus obtained, and an electrophotographic apparatus having that member.Type: GrantFiled: January 31, 2002Date of Patent: January 25, 2005Assignee: Canon Kabushiki KaishaInventors: Toshiyuki Ehara, Junichiro Hashizume, Masaya Kawada, Tetsuya Karaki, Hironori Ohwaki, Kunimasa Kawamura, Ryuji Okamura, Kazuto Hosoi
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Publication number: 20040261716Abstract: A deposition film forming apparatus has a reaction vessel the inside of which can be evacuated. In the reaction vessel, a gas supplying unit for supplying a raw material gas is arranged, and a plurality of cylindrical substrates are arranged at equal intervals on a common circumference. A high-frequency electric power introducing unit is arranged outside the reaction vessel. A deposition film is formed on the cylindrical substrates by exciting and dissociating the raw material gas by means of high-frequency electric power. The deposition film forming apparatus has a grounded and conductive cylindrical member placed in an area surrounded by the cylindrical substrates arranged on the common circumference.Type: ApplicationFiled: June 23, 2004Publication date: December 30, 2004Applicant: CANON KABUSHIKI KAISHAInventors: Junichiro Hashizume, Ryuji Okamura, Tetsuya Karaki, Shinji Tsuchida, Takashi Ohtsuka
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Patent number: 6764800Abstract: In an electrophotographic image process, a latent image is formed on a photosensitive drum, and a toner image is formed on the latent image. The toner image is temporarily transferred onto an intermediate image-transfer element. The photosensitive drum and the intermediate image-transfer element are brought into contact at an intended contact pressure and are rotated at a prescribed relative speed. At the contact portion, fine vibrations of the photosensitive drum and the intermediate image-transfer element, which can be caused by repeated contact and separation are prevented by controlling the contact temperature between the photosensitive member and the intermediate image-transfer element to be in the range of 15 to 60° C. A kinetic frictional deviation (a standard deviation of a kinetic frictional force) is controlled to be less than the average value of the kinetic frictional force. By suppressing the fine vibration, deviation in image transfer is prevented.Type: GrantFiled: April 26, 2001Date of Patent: July 20, 2004Assignee: Canon Kabushiki KaishaInventors: Koji Yamazaki, Hiroyuki Kobayashi, Masaya Kawada, Tetsuya Karaki, Hironori Owaki
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Publication number: 20040023140Abstract: A light-receiving member comprising a conductive substrate, and formed superposingly thereon a photosensitive layer and a surface protective layer in order. The light-receiving member has a surface roughness Ra of from 15 nm to 100 nm. Also disclosed is an image-forming apparatus having such a light-receiving member, and an image-forming method of rendering visible an electrostatic pattern formed on the light-receiving member. The light-receiving member promises stable formation of images over a long period of time.Type: ApplicationFiled: May 2, 2003Publication date: February 5, 2004Inventors: Kunimasa Kawamura, Shigenori Ueda, Toshiyuki Ehara, Junichiro Hashizume, Ryuji Okamura, Masaya Kawada, Tetsuya Karaki, Hironori Ohwaki
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Patent number: 6686109Abstract: In an electrophotographic process using an amorphous silicon photosensitive member which has a surface protective layer and effecting reverse development and cleaning with a cleaning blade, the surface moving speed PS (mm/sec) of the photosensitive member is 320 mm/sec or more and a film thickness and a specific resistance value of the surface protective layer are respectively Ds (&mgr;m) and Rs (&OHgr;·cm) which fulfill the following conditions: 1.0×109≦Rs≦1.0×1013 Ds≦−0.136Ln(Rs)+(−0.004×PS+6).Type: GrantFiled: March 27, 2002Date of Patent: February 3, 2004Assignee: Canon Kabushiki KaishaInventors: Hideaki Matsuoka, Yoshio Segi, Hiroyuki Katagiri, Tetsuya Karaki
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Patent number: 6636715Abstract: To provide an amorphous Si photosensitive member and an image forming apparatus which form favorable images by preventing toner adhesion at a cleaning time. A photoconductive layer 102 containing amorphous Si is formed on an electrically conductive substrate 101 so that a surface of a photosensitive member has an average inclination &Dgr;a within a range of 0.12 to 1.0, more preferably 0.15 to 0.8 within a range of 10 &mgr;m×10 &mgr;m, and an electrically conductive substrate has surface roughness Ra within the range of 10 &mgr;m×10 &mgr;m is lower than 9 nm, preferably lower than 6 nm.Type: GrantFiled: May 22, 2001Date of Patent: October 21, 2003Assignee: Canon Kabushiki KaishaInventors: Kunimasa Kawamura, Koji Yamazaki, Toshiyuki Ehara, Masaya Kawada, Tetsuya Karaki, Hironori Owaki
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Patent number: 6605405Abstract: Provided are an electrophotographic method and an electrophotographic apparatus that can reduce ghost memory latent in an a-Si photosensitive member, relieve potential unevenness, and provide image copies with high quality. In an electrophotographic process of forming a toner image at least through decharging of a photosensitive member as a recording element, charging, exposing, developing, and transferring, at least a light-receiving layer of the photosensitive member is comprised of an amorphous material; a latent image is formed by the exposing with a light; the light has such a peak wavelength in an emission spectrum as to make minimum a value of optical memory at a unit contrast potential; and the decharging is implemented by use of a light having a full width at half maximum of a peak in an emission spectrum of not more than 50 nm.Type: GrantFiled: July 25, 2001Date of Patent: August 12, 2003Assignee: Canon Kabushiki KaishaInventors: Hironori Owaki, Toshiyuki Ehara, Yuji Nakayama, Masaya Kawada, Takaaki Kaya, Tetsuya Karaki
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Patent number: 6586149Abstract: A light-receiving member comprising a conductive substrate, and formed superposingly thereon a photosensitive layer and a surface protective layer in order. The light-receiving member has a surface roughness Ra of from 15 nm to 100 nm. Also disclosed is an image-forming apparatus having such a light-receiving member, and an image-forming method of rendering visible an electrostatic pattern formed on the light-receiving member. The light-receiving member promises stable formation of images over a long period of time.Type: GrantFiled: March 16, 2001Date of Patent: July 1, 2003Assignee: Canon Kabushiki KaishaInventors: Kunimasa Kawamura, Shigenori Ueda, Toshiyuki Ehara, Junichiro Hashizume, Ryuji Okamura, Masaya Kawada, Tetsuya Karaki, Hironori Ohwaki
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Patent number: 6534228Abstract: To provide a Si photosensitive member and an image forming apparatus which prevents toner adherence at the time of cleaning and forms an excellent image, an electrophotographic photosensitive member comprising a photoconductive layer including amorphous Si and a surface protective layer which are formed on an electroconductive substrate has a difference in the height of concave and convex corresponding to 90% and 50% of a cumulative frequency of the height of concave and convex with respect to the most deepest point of surface roughness concave and convex within a range of 10 &mgr;m×10 &mgr;m of the photosensitive member as a standard which is set within a range of 3 nm to 200 nm.Type: GrantFiled: May 18, 2001Date of Patent: March 18, 2003Assignee: Canon Kabushiki KaishaInventors: Masaya Kawada, Toshiyuki Ehara, Tetsuya Karaki, Hironori Ohwaki, Kunimasa Kawamura
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Publication number: 20030049556Abstract: In an electrophotographic process using an amorphous silicon photosensitive member which has a surface protective layer and effecting reverse development and cleaning with a cleaning blade, the surface moving speed PS (mm/sec) of the photosensitive member is 320 mm/sec or more and a film thickness and a specific resistance value of the surface protective layer are respectively Ds (&mgr;m) and Rs (&OHgr;·cm) which fulfill the following conditions:Type: ApplicationFiled: March 27, 2002Publication date: March 13, 2003Inventors: Hideaki Matsuoka, Yoshio Segi, Hiroyuki Katagiri, Tetsuya Karaki