Patents by Inventor Osamu Sukegawa
Osamu Sukegawa 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: 8289483Abstract: A semi-transmissive-type liquid crystal display device is provided which is capable of preventing an electric erosion reaction between a reflective film made of Al (aluminum) or an Al alloy and a transparent electrode film made of ITO or a like (Indium Tin Oxide) and of inhibiting occurrence of a flicker caused by a residual DC (Direct Current) voltage in the reflective film. In the semi-transmissive-type of a liquid crystal display device, a transmissive region to provide light from a backlight source and a reflective region to receive ambient light are placed in a pixel region and a transparent electrode film is formed above a reflective film formed in the reflective region on an active matrix substrate with a second passivation film being interposed between the reflective film and the transparent electrode film.Type: GrantFiled: August 11, 2011Date of Patent: October 16, 2012Assignee: NLT Technologies, Ltd.Inventors: Mamoru Okamoto, Michiaki Sakamoto, Osamu Sukegawa, Ken-Ichirou Naka, Shin-ichi Nakata, Masami Yamashita
-
Publication number: 20120034721Abstract: A semi-transmissive-type liquid crystal display device is provided which is capable of preventing an electric erosion reaction between a reflective film made of Al (aluminum) or an Al alloy and a transparent electrode film made of ITO or a like (Indium Tin Oxide) and of inhibiting occurrence of a flicker caused by a residual DC (Direct Current) voltage in the reflective film. In the semi-transmissive-type of a liquid crystal display device, a transmissive region to provide light from a backlight source and a reflective region to receive ambient light are placed in a pixel region and a transparent electrode film is formed above a reflective film formed in the reflective region on an active matrix substrate with a second passivation film being interposed between the reflective film and the transparent electrode film.Type: ApplicationFiled: August 11, 2011Publication date: February 9, 2012Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Mamoru Okamoto, Michiaki Sakamoto, Osamu Sukegawa, Ken-Ichirou Naka, Shin-ichi Nakata, Masami Yamashita
-
Patent number: 8089589Abstract: A semi-transmissive-type liquid crystal display device is provided which is capable of preventing an electric erosion reaction between a reflective film made of Al (aluminum) or an Al alloy and a transparent electrode film made of ITO or a like (Indium Tin Oxide) and of inhibiting occurrence of a flicker caused by a residual DC (Direct Current) voltage in the reflective film. In the semi-transmissive-type of a liquid crystal display device, a transmissive region to provide light from a backlight source and a reflective region to receive ambient light are placed in a pixel region and a transparent electrode film is formed above a reflective film formed in the reflective region on an active matrix substrate with a second passivation film being interposed between the reflective film and the transparent electrode film.Type: GrantFiled: April 20, 2006Date of Patent: January 3, 2012Assignee: NLT Technologies, Ltd.Inventors: Mamoru Okamoto, Michiaki Sakamoto, Osamu Sukegawa, Ken-Ichirou Naka, Shin-Ichi Nakata, Masami Yamashita
-
Patent number: 7609343Abstract: In a semi-transmissive liquid crystal display device, the thickness of liquid crystal layer in the reflective region can be adjusted by controlling the film thickness of the organic insulating film for reflection and the film thickness of the color layer for reflection. Furthermore, the thickness of liquid crystal layer in the transmissive region can be adjusted by controlling the film thickness of the organic insulating film for transmission and the film thickness of the color layer for transmission. Since the thicknesses of liquid crystal layer in the reflective region and that in the transmissive region can be adjusted, the reflectance in the reflective region and the transmittance in the transmissive region can each be set at the most appropriate values.Type: GrantFiled: November 2, 2005Date of Patent: October 27, 2009Assignees: NEC LCD Technologies, Ltd., NEC CorporationInventors: Michiaki Sakamoto, Osamu Sukegawa, Hidenori Ikeno
-
Patent number: 7157315Abstract: An active matrix substrate includes a substrate composed of resin, and a polysilicon thin film diode formed on the substrate. The polysilicon thin film diode may be a lateral diode centrally having a region into which impurity is doped. As an alternative, the polysilicon thin film diode may be comprised of two lateral diodes electrically connected in parallel to each other and arranged in opposite directions.Type: GrantFiled: February 13, 2004Date of Patent: January 2, 2007Assignee: NEC LCD Technologies, Ltd.Inventors: Hiroshi Okumura, Osamu Sukegawa
-
Publication number: 20060187392Abstract: A semi-transmissive-type liquid crystal display device is provided which is capable of preventing an electric erosion reaction between a reflective film made of Al (aluminum) or an Al alloy and a transparent electrode film made of ITO or a like (Indium Tin Oxide) and of inhibiting occurrence of a flicker caused by a residual DC (Direct Current) voltage in the reflective film. In the semi-transmissive-type of a liquid crystal display device, a transmissive region to provide light from a backlight source and a reflective region to receive ambient light are placed in a pixel region and a transparent electrode film is formed above a reflective film formed in the reflective region on an active matrix substrate with a second passivation film being interposed between the reflective film and the transparent electrode film.Type: ApplicationFiled: April 20, 2006Publication date: August 24, 2006Applicant: NEC LCD Technologies, Ltd.Inventors: Mamoru Okamoto, Michiaki Sakamoto, Osamu Sukegawa, Ken-Ichirou Naka, Shin-Ichi Nakata, Masami Yamashita
-
Patent number: 7064799Abstract: A semi-transmissive-type liquid crystal display device is provided which is capable of preventing an electric erosion reaction between a reflective film made of Al (aluminum) or an Al alloy and a transparent electrode film made of ITO or a like (Indium Tin Oxide) and of inhibiting occurrence of a flicker caused by a residual DC (Direct Current) voltage in the reflective film. In the semi-transmissive-type of a liquid crystal display device, a transmissive region to provide light from a backlight source and a reflective region to receive ambient light are placed in a pixel region and a transparent electrode film is formed above a reflective film formed in the reflective region on an active matrix substrate with a second passivation film being interposed between the reflective film and the transparent electrode film.Type: GrantFiled: July 8, 2003Date of Patent: June 20, 2006Assignee: NEC LCD Technologies, Ltd.Inventors: Mamoru Okamoto, Michiaki Sakamoto, Osamu Sukegawa, Ken-Ichirou Naka, Shin-Ichi Nakata, Masami Yamashita
-
Patent number: 7015996Abstract: In a semi-transmissive liquid crystal display device, the thickness of liquid crystal layer in the reflective region can be adjusted by controlling the film thickness of the organic insulating film for reflection and the film thickness of the color layer for reflection. Furthermore, the thickness of liquid crystal layer in the transmissive region can be adjusted by controlling the film thickness of the organic insulating film for transmission and the film thickness of the color layer for transmission. Since the thicknesses of liquid crystal layer in the reflective region and that in the transmissive region can be adjusted, the reflectance in the reflective region and the transmittance in the transmissive region can each be set at the most appropriate values.Type: GrantFiled: November 19, 2002Date of Patent: March 21, 2006Assignees: NEC Corporation, NEC LCD Technologies, Inc.Inventors: Michiaki Sakamoto, Osamu Sukegawa, Hidenori Ikeno
-
Publication number: 20060055851Abstract: In a semi-transmissive liquid crystal display device, the thickness of liquid crystal layer in the reflective region can be adjusted by controlling the film thickness of the organic insulating film for reflection and the film thickness of the color layer for reflection. Furthermore, the thickness of liquid crystal layer in the transmissive region can be adjusted by controlling the film thickness of the organic insulating film for transmission and the film thickness of the color layer for transmission. Since the thicknesses of liquid crystal layer in the reflective region and that in the transmissive region can be adjusted, the reflectance in the reflective region and the transmittance in the transmissive region can each be set at the most appropriate values.Type: ApplicationFiled: November 2, 2005Publication date: March 16, 2006Applicants: NEC LCD Technologies, Ltd., NEC CorporationInventors: Michiaki Sakamoto, Osamu Sukegawa, Hidenori Ikeno
-
Patent number: 6873377Abstract: A dedicated control signal electrode is provided between pixel electrodes, and a strong electric field is generated between the control signal electrode and the common electrode to quickly and securely make an initial transition from liquid crystal molecules in a splay alignment state to the same in a bend alignment state. In addition, generating a strong electric field between the control signal electrode and the common electrode even during operation for displaying an image makes liquid crystal molecules stably stay in a bend alignment state. In this case the scan signal electrode, the video signal electrode and the common electrode, which are required for displaying an image, are not used to make a transition from liquid crystal molecules in a splay alignment state to the same in a bend alignment state and make the same stay in a bend alignment state.Type: GrantFiled: September 10, 2002Date of Patent: March 29, 2005Assignees: NEC Corporation, NEC LCD Technologies, Ltd.Inventors: Takayuki Konno, Osamu Sukegawa, Masayoshi Suzuki, Makoto Watanabe
-
Patent number: 6859246Abstract: An OCB type liquid crystal display having first and second substrates opposed to each other via a liquid crystal layer such that rubbing directions of the first and second substrates become parallel to each other, a plurality of pixel electrodes which correspond to respective pixels, and a common electrode formed on the second substrate which receives a reference voltage commonly to a plurality of the pixels. A first transition nucleus area is formed in the first substrate layer and has a plurality of continuous slant surfaces having a saw-tooth cross sectional profile, and a second transition nucleus area is formed in the second substrate and has a plurality of continuous slant surfaces having a saw-tooth cross sectional profile. The slant surfaces in the first and second transition nucleus areas oppose to each other and slope toward mutually opposite angular directions.Type: GrantFiled: June 19, 2002Date of Patent: February 22, 2005Assignee: NEC LCD Technologies, Ltd.Inventors: Takayuki Konno, Osamu Sukegawa, Masayoshi Suzuki, Makoto Watanabe
-
Publication number: 20050030450Abstract: A semi-transmissive-type liquid crystal display device is provided which is capable of preventing an electric erosion reaction between a reflective film made of Al (aluminum) or an Al alloy and a transparent electrode film made of ITO or a like (Indium Tin Oxide) and of inhibiting occurrence of a flicker caused by a residual DC (Direct Current) voltage in the reflective film. In the semi-transmissive-type of a liquid crystal display device, a transmissive region to provide light from a backlight source and a reflective region to receive ambient light are placed in a pixel region and a transparent electrode film is formed above a reflective film formed in the reflective region on an active matrix substrate with a second passivation film being interposed between the reflective film and the transparent electrode film.Type: ApplicationFiled: July 8, 2003Publication date: February 10, 2005Inventors: Mamoru Okamoto, Michiaki Sakamoto, Osamu Sukegawa, Ken-Ichirou Naka, Shin-Ichi Nakata, Masami Yamashita
-
Publication number: 20040159840Abstract: An active matrix substrate includes a substrate composed of resin, and a polysilicon thin film diode formed on the substrate. The polysilicon thin film diode may be a lateral diode centrally having a region into which impurity is doped. As an alternative, the polysilicon thin film diode may be comprised of two lateral diodes electrically connected in parallel to each other and arranged in opposite directions.Type: ApplicationFiled: February 13, 2004Publication date: August 19, 2004Inventors: Hiroshi Okumura, Osamu Sukegawa
-
Patent number: 6734460Abstract: An active matrix substrate includes a substrate composed of resin, and a polysilicon thin film diode formed on the substrate. The polysilicon thin film diode may be a lateral diode centrally having a region into which impurity is doped. As an alternative, the polysilicon thin film diode may be comprised of two lateral diodes electrically connected in parallel to each other and arranged in opposite directions.Type: GrantFiled: April 2, 2002Date of Patent: May 11, 2004Assignee: NEC LCD Technologies, Ltd.Inventors: Hiroshi Okumura, Osamu Sukegawa
-
Publication number: 20030095217Abstract: In a semi-transmissive liquid crystal display device, the thickness of liquid crystal layer in the reflective region can be adjusted by controlling the film thickness of the organic insulating film for reflection and the film thickness of the color layer for reflection. Furthermore, the thickness of liquid crystal layer in the transmissive region can be adjusted by controlling the film thickness of the organic insulating film for transmission and the film thickness of the color layer for transmission. Since the thicknesses of liquid crystal layer in the reflective region and that in the transmissive region can be adjusted, the reflectance in the reflective region and the transmittance in the transmissive region can each be set at the most appropriate values.Type: ApplicationFiled: November 19, 2002Publication date: May 22, 2003Applicant: NEC CorporationInventors: Michiaki Sakamoto, Osamu Sukegawa, Hidenori Ikeno
-
Publication number: 20030048402Abstract: A dedicated control signal electrode is provided between pixel electrodes, and a strong electric field is generated between the control signal electrode and the common electrode to quickly and securely make an initial transition from liquid crystal molecules in a splay alignment state to the same in a bend alignment state. In addition, generating a strong electric field between the control signal electrode and the common electrode even during operation for displaying an image makes liquid crystal molecules stably stay in a bend alignment state. In this case the scan signal electrode, the video signal electrode and the common electrode, which are required for displaying an image, are not used to make a transition from liquid crystal molecules in a splay alignment state to the same in a bend alignment state and make the same stay in a bend alignment state.Type: ApplicationFiled: September 10, 2002Publication date: March 13, 2003Applicant: NEC CorporationInventors: Takayuki Konno, Osamu Sukegawa, Masayoshi Suzuki, Makoto Watanabe
-
Publication number: 20030020857Abstract: An OCB type liquid crystal display having first and second substrates opposed to each other via a liquid crystal layer such that rubbing directions of the first and second substrates become parallel to each other, a plurality of pixel electrodes which correspond to respective pixels, and a common electrode formed on the second substrate which receives a reference voltage commonly to a plurality of the pixels. A first transition nucleus area is formed in the first substrate layer and has a plurality of continuous slant surfaces having a saw-tooth cross sectional profile, and a second transition nucleus area is formed in the second substrate and has a plurality of continuous slant surfaces having a saw-tooth cross sectional profile. The slant surfaces in the first and second transition nucleus areas oppose to each other and slope toward mutually opposite angular directions.Type: ApplicationFiled: June 19, 2002Publication date: January 30, 2003Applicant: NEC CORPORATIONInventors: Takayuki Konno, Osamu Sukegawa, Masayoshi Suzuki, Makoto Watanabe
-
Patent number: 6476418Abstract: In a TFT (Thin Film Transistor) of the present invention applicable to an LCD (Liquid Crystal Display) includes a gate electrode, a gate insulation film, an island-like semiconductor layer, a drain electrode and a source electrode sequentially laminated on a transparent insulative substrate. A part of the semiconductor layer above the gate electrode in the direction of channel length has a smaller dimension than the other part in the direction of channel width. With this configuration, the TFT reduces a light OFF current while preventing a light ON current from being reduced.Type: GrantFiled: June 30, 1998Date of Patent: November 5, 2002Assignee: NEC CorporationInventors: Shunsuke Shiga, Osamu Sukegawa
-
Publication number: 20020139972Abstract: An active matrix substrate includes a substrate composed of resin, and a polysilicon thin film diode formed on the substrate. The polysilicon thin film diode may be a lateral diode centrally having a region into which impurity is doped. As an alternative, the polysilicon thin film diode may be comprised of two lateral diodes electrically connected in parallel to each other and arranged in opposite directions.Type: ApplicationFiled: April 2, 2002Publication date: October 3, 2002Applicant: NEC CorporationInventors: Hiroshi Okumura, Osamu Sukegawa
-
Patent number: 6259503Abstract: An active matrix LCD device has a plurality of pixel elements arranged in a matrix for display. The electric field generated between the pixel electrode and the common electrode is diagonal to the normal of the surface of the electrodes. The diagonal electric field is achieved by a slit formed in the TFT panel between the pixel electrodes and the common electrode, or by protrusions formed on the surfaces of the electrodes.Type: GrantFiled: December 28, 1998Date of Patent: July 10, 2001Assignee: NEC CorporationInventors: Makoto Watanabe, Osamu Sukegawa