Patents by Inventor Stephen K. Heeks
Stephen K. Heeks 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: 7071612Abstract: An opto-electrical device comprising an anode electrode, a cathode electrode, and an opto-electrically active region located between the electrodes, the cathode electrode including a first layer comprising a material having a work function below 3.5 eV, a second layer of a different composition from the first layer, comprising another material having a work function below 3.5 eV, the second layer being further from the opto-electrically active region than the first layer, and a third layer comprising a material having a work function above 3.5 eV, the third layer being further from the opto-electrically active region than the first layer.Type: GrantFiled: July 15, 2004Date of Patent: July 4, 2006Assignee: Cambridge Display Technology LimitedInventors: Jeremy H. Burroughes, Julian C. Carter, Alec G. Gunner, Stephen K. Heeks, Ian S. Millard
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Patent number: 6992438Abstract: An opto-electrical device comprising an anode electrode, a cathode electrode, and an opto-electrically active region located between the electrodes, the cathode electrode including a first layer comprising a compound of a group 1 metal, group 2 metal, or a transition metal, a second layer comprising a material having a work function below 3.5 eV, and a third layer spaced from the opto-electrically active region by the first and second layers and having a work function above 3.5 eV.Type: GrantFiled: March 15, 2004Date of Patent: January 31, 2006Assignee: Cambridge Display Technology LimitedInventors: Jeremy H. Burroughes, Julian C. Carter, Alec G. Gunner, Stephen K. Heeks, Ian S. Millard
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Publication number: 20040189189Abstract: An opto-electrical device comprising an anode electrode, a cathode electrode, and an opto-electrically active region located between the electrodes, the cathode electrode including a first layer comprising a compound of a group 1 metal, group 2 metal, or a transition metal, a second layer comprising a material having a work function below 3.5 eV, and a third layer spaced from the opto-electrically active region by the first and second layers and having a work function above 3.5 eV.Type: ApplicationFiled: March 15, 2004Publication date: September 30, 2004Applicant: Cambridge Display Technology Ltd.Inventors: Jeremy H. Burroughes, Julian C. Carter, Alec G. Gunner, Stephen K. Heeks, Ian S. Millard
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Patent number: 6765350Abstract: An opto-electrical device comprising an anode electrode, a cathode electrode, and an opto-electrically active region located between the electrodes, the cathode electrode including a first layer comprising a material having a work function below 3.5 eV, a second layer of a different composition from the first layer, comprising another material having a work function below 3.5 eV, the second layer being further from the opto-electrically active region than the first layer, and a third layer comprising a material having a work function above 3.5 eV, the third layer being further from the opto-electrically active region than the first layer.Type: GrantFiled: January 29, 2002Date of Patent: July 20, 2004Assignee: Cambridge Display Technology Ltd.Inventors: Jeremy H. Burroughes, Julian C. Carter, Alec G. Gunner, Stephen K. Heeks, Ian S. Millard
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Patent number: 6707248Abstract: An opto-electrical device comprising an anode electrode, a cathode electrode, and an opto-electrically active region located between the electrodes, the cathode electrode including a first layer comprising a compound of a group 1, group 2 or transition metal, a second layer comprising a material having a work function below 3.5 eV, and a third layer spaced from the opto-electrically active region by the first and second layers and having a work function above 3.5 eV.Type: GrantFiled: December 19, 2001Date of Patent: March 16, 2004Assignee: Cambridge Display Technology Ltd.Inventors: Jeremy H. Burroughes, Julian C. Carter, Alec G. Gunner, Stephen K. Heeks
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Publication number: 20030193796Abstract: The present invention relates to a light-emitting device including a plurality of regions of phosphorescent material and a plurality of individually actuable regions of organic light-emitting material. The device is capable of emitting radiation of a wavelength that can excite the phosphoresce, each region of organic light-emitting material being arranged for emitting radiation to a respective region of phosphorescent material to cause phosphorescence of the material in that region.Type: ApplicationFiled: April 15, 2002Publication date: October 16, 2003Inventors: Stephen K. Heeks, Paul R. Berger
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Publication number: 20030169590Abstract: A container for storage wherein an organic light emitting device is provided on a surface thereof or as part of a wall thereof such that light emitted from the organic light emitting device is visible from the exterior of the container.Type: ApplicationFiled: January 17, 2003Publication date: September 11, 2003Inventors: Ole Sorli, Jeremy H. Burroughes, Stephen K. Heeks
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Patent number: 6498049Abstract: A method for forming a display device, comprising: depositing a thin-film transistor switch circuit on a substrate; depositing by ink-jet printing an electrode layer of light transmissive conductive organic material in electrical contact with the output of the thin-film transistor circuit; and depositing an active region of the device over the electrode layer.Type: GrantFiled: August 17, 2000Date of Patent: December 24, 2002Assignees: Cambridge Display Technology, Seiko Epson CorporationInventors: Richard H. Friend, Carl R. Towns, Julian C. Carter, Stephen K. Heeks, Hermann F. Wittman, Karl Pichler, Ichio Yudasaka
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Patent number: 6429601Abstract: An organic light-emitting device having an organic light-emitting region comprising a plurality of organic light-emitting pixels; switch means each associated with a respective pixel for switching power to that pixel; and drive means for driving each switch means to cycle between a first, low power mode and a second, high power mode, at a frequency sufficient to cause light emission from the associated pixel to appeal substantially continuous, the duration of the highpower mode relative to the low power mode being variable so as to vary the average brightness of the pixel.Type: GrantFiled: August 17, 2000Date of Patent: August 6, 2002Assignee: Cambridge Display Technology Ltd.Inventors: Richard H. Friend, Jeremy H. Burroughes, Mutsumi Kimura, Stephen K. Heeks