Patents by Inventor Tatsundo Kawai
Tatsundo Kawai 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).
-
Patent number: 6636001Abstract: An organic electronic device functioning as a flat EL display panel is provided by forming an organic EL element and a nonlinear device as a drive means for controlling a current supplied to the EL device on a common substrate. The nonlinear device has a structure including a first organic layer and a second organic layer each comprising an organic material, and at least one metal layer principally comprising a metal element and sandwiched between the first and second organic layers so as to flow at least a part of current through the metal layer between the first and second organic layers sandwiching the metal layer. The nonlinear device having a function comparable to a conventional organic transistor or diode can be formed by using not a special organic material having a remarkably high mobility but an organic material selected from a broader class of materials.Type: GrantFiled: December 31, 2001Date of Patent: October 21, 2003Assignee: Canon Kabushiki KaishaInventors: Tatsundo Kawai, Akihiro Senoo, Kazunori Ueno
-
Patent number: 6566806Abstract: A luminescence device is formed of a substrate, and a laminated layer structure formed on the substrate including a plurality of luminescence layers emitting different luminescence colors, and a plurality of electrodes forming pairs of electrodes each sandwiching an associated luminescence layer. At least one of the plurality of electrodes are provided with apertures, through which a luminescence flux emitted from at least one of the luminescence layers is transmitted. As a result, the luminescence device can emit different luminescence colors expected to cause color mixing with each other with a minimum of positional difference leading to color irregularity.Type: GrantFiled: November 2, 2000Date of Patent: May 20, 2003Assignee: Canon Kabushiki KaishaInventor: Tatsundo Kawai
-
Patent number: 6556317Abstract: In an image sensor which has a photoelectric conversion element group, an illumination device having light sources of at least three emission colors R, G, and B, an imaging lens, and the like, moire noise in a color output image is eliminated, the original reading time is shortened, and a cost reduction is attained. For this purpose, a sensor array including a linear array of a plurality of photoelectric conversion elements, a lens array for imaging an original image on the sensor array, an illumination device using LEDs having emission colors R, G, and B, and a cover glass are supported by and fixed to a frame. The conjugate length of the lens array is set to fall within the range between the R and G emission wavelengths. An original pressed against the cover glass is illuminated by the illumination device, and light reflected by the original is converted into electrical signals by the sensor array, thereby reading the original image.Type: GrantFiled: July 25, 1997Date of Patent: April 29, 2003Assignee: Canon Kabushiki KaishaInventors: Masami Tabata, Tatsundo Kawai
-
Publication number: 20030076551Abstract: There is disclosed an illumination device in which a light guide is adapted to emil the light from a face thereof and is provided with an area, on a face opposite to the light emitting face, for diffusing and/or reflecting the light introduced into the light guide from an end face thereof or is provided with uneven light emitting characteristics along the longitudinal direction of the light guide, and the center of the light source positioned at the end of the light guide is placed at a position aberrated from the normal line to said area, whereby attained are compactnces, a low cost, a low eleotric power consumption, a high efficiency of utilization of the light emitted by the light source, and excellent and uniform illumination characteristics. There are also disclosed an image reading device and an information processing apparatus, equipped with the above-mentioned illumination device.Type: ApplicationFiled: November 18, 2002Publication date: April 24, 2003Applicant: CANON KABUSHIKI KAISHAInventors: Tatsundo Kawai, Osamu Hamamoto, Shinichi Takeda, Satoshi Itabashi, Toshimitsu Iso
-
Publication number: 20030044518Abstract: An organic luminescence device capable of luminescence at a high efficiency, a high luminance and high durability is formed by a pair of electrodes comprising an anode and a cathode, and at least one organic layer disposed between the electrodes. The at least one organic layer includes at least one layer comprising a polymerized film of organic layer having at least two polymerizable double bonds.Type: ApplicationFiled: September 23, 2002Publication date: March 6, 2003Applicant: CANON KABUSHIKI KAISHAInventors: Akihiro Senoo, Tatsundo Kawai, Yoichi Osato, Yuichi Hashimoto, Koichi Suzuki, Hiroshi Tanabe, Kazunori Ueno, Seiji Mashimo
-
Patent number: 6512600Abstract: There is disclosed an illumination device in which a light guide is adapted to emit the light from a face thereof and is provided with an area, on a face opposite to the light emitting face, for diffusing and/or reflecting the light introduced into the light guide from an end face thereof or is provided with uneven light emitting characteristics along the longitudinal direction of the light guide, and the center of the light source positioned at the end of the light guide is placed at a position aberrated from the normal line to the area, whereby attained are compactness, a low cost, a low electric power consumption, a high efficiency of utilization of the light emitted by the light source, and excellent and uniform illumination characteristics. There are also disclosed an image reading device and an information processing apparatus, equipped with the above-mentioned illumination device.Type: GrantFiled: October 10, 1997Date of Patent: January 28, 2003Assignee: Canon Kabushiki KaishaInventors: Tatsundo Kawai, Osamu Hamamoto, Shinichi Takeda, Satoshi Itabashi
-
Publication number: 20020171358Abstract: The present invention provides a very durable charge injection type light emitting device. In a charge injection type light emitting device comprising a positive electrode, a negative electrode, and an organic film sandwiched between the positive and negative electrodes and composed of one or more organic compounds, the organic film containing at least one light emitting layer, a potential barrier to electrons between the light emitting layer and a barrier layer defined as a member that contacts with the light emitting layer from the positive electrode side is 0.5 eV or more.Type: ApplicationFiled: March 13, 2002Publication date: November 21, 2002Applicant: Canon Kabushiki KaishaInventors: Yuichi Hashimoto, Tatsundo Kawai, Kazunori Ueno
-
Patent number: 6473154Abstract: There is disclosed a light guide for guiding light from a light source in a longitudinal direction and radiating the light to illuminate an object to be illuminated, which includes a diffuser for diffusing the light from the light source along the longitudinal direction of the light guide, and a radiator for radiating the light diffused by the diffuser in a predetermined direction. By arranging the diffuser and the radiator so that a normal line passing through the center of the width of the diffuser is different from the predetermined direction at least in the vicinity of the light source when viewed in the longitudinal direction of the light guide, the illuminance distribution of the longitudinal direction of the light guide is uniformed.Type: GrantFiled: November 1, 2001Date of Patent: October 29, 2002Assignee: Canon Kabushiki KaishaInventors: Masami Tabata, Tatsundo Kawai
-
Patent number: 6462841Abstract: An image sensor comprises signal generation unit for generating an image signal on the basis of reflected light using a plurality of photoelectric converters arranged on a substrate, and image forming unit for projecting the reflected light, from an original image, within a predetermined area on the substrate on which the signal generation unit is provided, wherein the signal generation unit includes signal output unit for outputting the image signal from the plurality of photoelectric converters to the outside of the signal generation unit, and a part or all of the signal output unit is arranged outside of the predetermined area on the substrate. Accordingly, reflection of light by the electrodes is prevented, and no light noise incidents on the photoelectric converters. Therefore, it is possible to increase the S/N ratio of the image sensor.Type: GrantFiled: April 3, 1998Date of Patent: October 8, 2002Assignee: Canon Kabushiki KaishaInventors: Masami Tabata, Tatsundo Kawai
-
Publication number: 20020109464Abstract: An organic electronic device functioning as a flat EL display panel is provided by forming an organic EL element and a nonlinear device as a drive means for controlling a current supplied to the EL device on a common substrate. The nonlinear device has a structure including a first organic layer and a second organic layer each comprising an organic material, and at least one metal layer principally comprising a metal element and sandwiched between the first and second organic layers so as to flow at least a part of current through the metal layer between the first and second organic layers sandwiching the metal layer. The nonlinear device having a function comparable to a conventional organic transistor or diode can be formed by using not a special organic material having a remarkably high mobility but an organic material selected from a broader class of materials.Type: ApplicationFiled: December 31, 2001Publication date: August 15, 2002Inventors: Tatsundo Kawai, Akihiro Senoo, Kazunori Ueno
-
Patent number: 6426807Abstract: There is disclosed an illumination device in which a light guide is adapted to emit the light from a face thereof and is provided with an area, on a face opposite to the light emitting face, for diffusing and/or reflecting the light introduced into the light guide from an end face thereof or is provided with uneven light emitting characteristics along the longitudinal direction of the light guide, and the center of the light source positioned at the end of the light guide is placed at a position aberrated from the normal line to the area, whereby attained are compactness, a low cost, a low electric power consumption, a high efficiency of utilization of the light emitted by the light source, and excellent and uniform illumination characteristics. There are also disclosed an image reading device and an information processing apparatus, equipped with the above-mentioned illumination device.Type: GrantFiled: August 29, 2000Date of Patent: July 30, 2002Assignee: Canon Kabushiki KaishaInventors: Tatsundo Kawai, Osamu Hamamoto, Shinichi Takeda, Satoshi Itabashi, Toshimitsu Iso
-
Patent number: 6375335Abstract: A light source or LED element is positioned adjacent to an entrance surface of a light guide element of stick shape made of a light transmissive substrate. The light that has entered from the entrance surface to the interior of the light guide element is scattered by a diffusion area to emerge from an exit surface in a predetermined direction, wherein the light that has entered from the entrance surface into the light guide element is not made incident directly on at least a part of the diffusion area.Type: GrantFiled: December 16, 1997Date of Patent: April 23, 2002Assignee: Canon Kabushiki KaishaInventors: Masami Tabata, Tatsundo Kawai
-
Publication number: 20020045062Abstract: An organic luminescence device capable of luminescence at a high efficiency, a high luminance and high durability is formed by a pair of electrodes comprising an anode and a cathode, and at least one organic layer disposed between the electrodes. The at least one organic layer includes at least one layer comprising a polymerized film of organic layer having at least two polymerizable double bonds.Type: ApplicationFiled: April 11, 2001Publication date: April 18, 2002Inventors: Akihiro Senoo, Tatsundo Kawai, Yoichi Osato, Yuichi Hashimoto, Koichi Suzuki, Hiroshi Tanabe, Kazunori Ueno, Seiji Mashimo
-
Patent number: 6360030Abstract: The form of a light condensing part of an illuminating device is of a freer form such as expressed by a general polynomial, rather than a round cross-sectional form.Type: GrantFiled: December 12, 1997Date of Patent: March 19, 2002Assignee: Canon Kabushiki KaishaInventors: Tatsundo Kawai, Masami Tabata
-
Publication number: 20020030862Abstract: In an image sensor which has a photoelectric conversion element group, an illumination device having light sources of at least three emission colors R, G, and B, an imaging lens, and the like, moiré noise in a color output image is eliminated, the original reading time is shortened, and a cost reduction is attained. For this purpose, a sensor array including a linear array of a plurality of photoelectric conversion elements, a lens array for imaging an original image on the sensor array, an illumination device using LEDs having emission colors R, G, and B, and a cover glass are supported by and fixed to a frame. The conjugate length of the lens array is set to fall within the range between the R and G emission wavelengths. An original pressed against the cover glass is illuminated by the illumination device, and light reflected by the original is converted into electrical signals by the sensor array, thereby reading the original image.Type: ApplicationFiled: July 25, 1997Publication date: March 14, 2002Inventors: MASAMI TABATA, TATSUNDO KAWAI
-
Publication number: 20020030803Abstract: There is disclosed a light guide for guiding light from a light source in a longitudinal direction and radiating the light to illuminate an object to be illuminated, which comprises a diffuser for diffusing the light from the light source along the longitudinal direction of the light guide, and a radiator for radiating the light diffused by the diffuser in a predetermined direction. By arranging the diffuser and the radiator so that a normal line passing through the center of the width of the diffuser is different from the predetermined direction at least in the vicinity of the light source when viewed in the longitudinal direction of the light guide, the illuminance distribution of the longitudinal direction of the light guide is uniformed.Type: ApplicationFiled: November 1, 2001Publication date: March 14, 2002Inventors: Masami Tabata, Tatsundo Kawai
-
Publication number: 20020030798Abstract: There is disclosed a light guide for guiding light from a light source in a longitudinal direction and radiating the light to illuminate an object to be illuminated, which comprises a diffuser for diffusing the light from the light source along the longitudinal direction of the light guide, and a radiator for radiating the light diffused by the diffuser in a predetermined direction. By arranging the diffuser and the radiator so that a normal line passing through the center of the width of the diffuser is different from the predetermined direction at least in the vicinity of the light source when viewed in the longitudinal direction of the light guide, the illuminance distribution of the longitudinal direction of the light guide is uniformed.Type: ApplicationFiled: November 1, 2001Publication date: March 14, 2002Inventors: Masami Tabata, Tatsundo Kawai
-
Patent number: 6350996Abstract: A light emitting diode device includes a light emitting diode and a non-linear element which are arranged on a substrate. The non-linear element is composed of an organic compound layer.Type: GrantFiled: April 23, 1999Date of Patent: February 26, 2002Assignee: Canon Kabushiki KaishaInventors: Tatsundo Kawai, Kazunori Ueno
-
Patent number: 6333779Abstract: There is disclosed a light guide for guiding light from a light source in a longitudinal direction and radiating the light to illuminate an object to be illuminated, which comprises a diffuser for diffusing the light from the light source along the longitudinal direction of the light guide, and a radiator for radiating the light diffused by the diffuser in a predetermined direction. By arranging the diffuser and the radiator so that a normal line passing through the center of the width of the diffuser is different from the predetermined direction at least in the vicinity of the light source when viewed in the longitudinal direction of the light guide, the illuminance distribution of the longitudinal direction of the light guide is uniformed.Type: GrantFiled: December 21, 1999Date of Patent: December 25, 2001Assignee: Canon Kabushiki KaishaInventors: Masami Tabata, Tatsundo Kawai
-
Patent number: 6295141Abstract: An image reading apparatus having a light guide unit with a light source for applying light to an image reading surface, and a board provided with a photoelectrical conversion element for photoelectrically converting light reflected from the image reading surface into an electrical signal, wherein the light guide unit is supported by the board by making the light guide unit in contact with the board.Type: GrantFiled: April 20, 1998Date of Patent: September 25, 2001Assignee: Canon Kabushiki KaishaInventors: Makoto Ogura, Kenji Nagata, Tatsundo Kawai, Oji Saito, Satoshi Itabashi, Masami Tabata