Patents by Inventor Xiao-Chang Li
Xiao-Chang Li 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: 7795802Abstract: Optical devices fabricated from solvent processible polymers suffer from susceptibility to solvents and morphological changes. A semiconductive polymer capable of luminescence in an optical device is provided. The polymer comprises a luminescent film-forming solvent processible polymer which contains cross-linking so as to increase its molar mass and to resist solvent dissolution, the cross-linking being such that the polymer retains semiconductive and luminescent properties.Type: GrantFiled: July 18, 2005Date of Patent: September 14, 2010Assignee: Cambridge Display Technology Ltd.Inventors: Andrew Bruce Holmes, Xiao-Chang Li, Stephen Carl Moratti, Kenneth Andrew Murray, Richard Henry Friend
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Patent number: 7709100Abstract: An organic light emitting device is provided. The device has an anode, a cathode, and an emissive layer disposed between the anode and the cathode. The emissive layer further includes a molecule of Formula I (shown below) wherein an alkyl substituent at position R?5, which is an alkyl substituent, results in high efficiency and operational stability in the organic light emitting device.Type: GrantFiled: December 21, 2004Date of Patent: May 4, 2010Assignee: Universal Display CorporationInventors: Raymond Kwong, David Knowles, Bin Ma, Xiao-Chang Li, William Ceyrolles
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Patent number: 7365141Abstract: Optical devices fabricated from solvent processible polymers suffer from susceptibility to solvents and morphological changes. A semiconductive polymer capable of luminescence in an optical device is provided. The polymer comprises a luminescent film-forming solvent processible polymer which contains cross-linking so as to increase its molar mass and to resist solvent dissolution, the cross-linking being such that the polymer retains semiconductive and luminescent properties.Type: GrantFiled: March 13, 2006Date of Patent: April 29, 2008Assignee: Cambridge Display Technology Ltd.Inventors: Andrew Bruce Holmes, Xiao-Chang Li, Stephen Carl Moratti, Kenneth Andrew Murray, Richard Henry Friend
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Publication number: 20070024603Abstract: A device for digitally generating a plurality of still pictures consist of a bistable reflective full color flat panel display such as an interference modulation flat panel display (IMD), a coated non-glare coating on the viewing side of the display panel, a cartridge shaped CPU, and a cartridge shaped audio/video playback system which are located in the picture frame. The reflective display disclosed in this patent resembles a traditional painting or photograph, and allows better viewability and reduces eye fatigue linked with luminous display device. The reflective flat panel display has bistable characteristics and therefore it consumes extremely low power in a still picture display state, and it is preferably powered by a set of batteries. The device is a structure resembling a framed picture, portrait, or a painting used in a home, hotel, museum, gallery, building corridor, or any people gathering place, and the displayed content can be easily changed digitally.Type: ApplicationFiled: July 28, 2005Publication date: February 1, 2007Inventor: Xiao-Chang Li
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Patent number: 7154114Abstract: An organic light emitting device is provided. The device has an anode, a cathode and an organic layer disposed between the anode and the cathode.Type: GrantFiled: January 10, 2005Date of Patent: December 26, 2006Assignees: Universal Display Corporation, The University of Southern CaliforniaInventors: Jason Brooks, Xiao-Chang Li, Bert Alleyne, Mark E. Thompson, Peter Djurovich, Arnold Tamayo
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Patent number: 7105621Abstract: Optical devices fabricated from solvent processible polymers suffer from susceptibility to solvents and morphological changes. A semiconductive polymer capable of luminescence in an optical device is provided. The polymer comprises a luminescent film-forming solvent processible polymer which contains cross-linking so as to increase its molar mass and to resist solvent dissolution, the cross-linking being such that the polymer retains semiconductive and luminescent properties.Type: GrantFiled: December 6, 2002Date of Patent: September 12, 2006Assignee: Cambridge Display Technology Ltd.Inventors: Andrew Bruce Holmes, Xiao-Chang Li, Stephen Carl Moratti, Kenneth Andrew Murray, Richard Henry Friend
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Publication number: 20060151782Abstract: Optical devices fabricated from solvent processible polymers suffer from susceptibility to solvents and morphological changes. A semiconductive polymer capable of luminescence in an optical device is provided. The polymer comprises a luminescent film-forming solvent processible polymer which contains cross-linking so as to increase its molar mass and to resist solvent dissolution, the cross-linking being such that the polymer retains semiconductive and luminescent properties.Type: ApplicationFiled: March 13, 2006Publication date: July 13, 2006Applicant: Cambridge Display Technology Ltd.Inventors: Andrew Holmes, Xiao-Chang Li, Stephen Moratti, Kenneth Murray, Richard Friend
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Publication number: 20060008673Abstract: An organic light emitting device is provided. The device has an anode, a cathode, and an emissive layer disposed between the anode and the cathode. The emissive layer further includes a molecule of Formula I wherein an alkyl substituent at position R?5 results in high efficiency and operational stability in the organic light emitting device.Type: ApplicationFiled: December 21, 2004Publication date: January 12, 2006Inventors: Raymond Kwong, David Knowles, Bin Ma, Xiao-Chang Li, William Ceyrolles
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Publication number: 20050282983Abstract: Optical devices fabricated from solvent processible polymers suffer from susceptibility to solvents and morphological changes. A semiconductive polymer capable of luminescence in an optical device is provided. The polymer comprises a luminescent film-forming solvent processible polymer which contains cross-linking so as to increase its molar mass and to resist solvent dissolution, the cross-linking being such that the polymer retains semiconductive and luminescent properties.Type: ApplicationFiled: July 18, 2005Publication date: December 22, 2005Applicant: Cambridge Display Technology Ltd.Inventors: Andrew Holmes, Xiao-Chang Li, Stephen Moratti, Kenneth Murray, Richard Friend
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Publication number: 20050260447Abstract: An organic light emitting device is provided. The device has an anode, a cathode and an organic layer disposed between the anode and the cathode.Type: ApplicationFiled: January 10, 2005Publication date: November 24, 2005Inventors: Jason Brooks, Xiao-Chang Li, Bert Alleyne, Mark Thompson, Peter Djurovich, Arnold Tamayo
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Patent number: 6919415Abstract: Optical devices fabricated from solvent processible polymers suffer from susceptibility to solvents and morphological changes. A semiconductive polymer capable of luminescence in an optical device is provided. The polymer comprises a luminescent film-forming solvent processible polymer which contains cross-linking so as to increase its molar mass and to resist solvent dissolution, the cross-linking being such that the polymer retains semiconductive and luminescent properties.Type: GrantFiled: August 15, 2003Date of Patent: July 19, 2005Assignee: Cambridge Display Technology Ltd.Inventors: Andrew Bruce Holmes, Xiao-Chang Li, Stephen Carl Moratti, Kenneth Andrew Murray, Richard Henry Friend
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Publication number: 20050031898Abstract: A pyrene based compound and its use in an organic light emitting device (OLED) according to the following formula: In the above formula, Z1 represents a hydrogen atom, deuterium atom, oxygen atom, silicon atom, selenium atom, substituted or unsubstituted aryl group, substituted or unsubstituted heteroaryl group, substituted or unsubstituted aryl amine or a combination thereof, and Z2 represents a hydrogen or deuterium atom. One of Y1 and Y2 represents a hydrogen atom, deuterium atom, oxygen atom, silicon atom, selenium atom, a substituted or unsubstituted aryl group, substituted or unsubstituted heteroaryl group, substituted or unsubstituted aryl amine or a combination thereof, and the other of Y1 and Y2 represents a hydrogen or deuterium atom. X1 through X6 independently represent hydrogen atoms, deuterium atoms, alkyl groups or aryl groups, and at least one of X1 through X6 represents a bulky alkyl group or bulky aryl group.Type: ApplicationFiled: August 6, 2003Publication date: February 10, 2005Applicant: Canon Kabushiki KaishaInventors: Xiao-Chang Li, Yoshimasa Okamura, Kazunori Ueno, Masashi Tashiro, Hideki Tashiro, G.K. Prakash
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Patent number: 6830830Abstract: The invention is directed to oxidized charge transport materials having hole transport capability in organic light emitting device (OLEDs). A charge transport compound including more than two triarylamine groups, or including at least one triarylamine group and at least one fluorene group, is partly complexed with an oxidant, such as a Lewis acid, preferably present in an amount between 0.2 and 20 percent by weight. The resulting charge transport materials exhibit good hole transport characteristics and film forming properties.Type: GrantFiled: April 18, 2002Date of Patent: December 14, 2004Assignee: Canon Kabushiki KaishaInventors: Bing R. Hsieh, Xiao-Chang Li, Alan Sellinger, Ghassan E. Jabbour
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Patent number: 6723811Abstract: Optical devices fabricated from solvent processible polymers suffer from susceptibility to solvents and morphological changes. A semiconductive polymer capable of luminescence in an optical device is provided. The polymer comprises a luminescent film-forming solvent processible polymer which contains cross-linking so as to increase its molar mass and to resist solvent dissolution, the cross-linking being such that the polymer retains semiconductive and luminescent properties.Type: GrantFiled: April 28, 2000Date of Patent: April 20, 2004Assignee: Cambridge Display Technology Ltd.Inventors: Andrew Bruce Holmes, Xiao-Chang Li, Stephen Carl Moratti, Kenneth Andrew Murray, Richard Henry Friend
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Publication number: 20040059077Abstract: Optical devices fabricated from solvent processible polymers suffer from susceptibility to solvents and morphological changes. A semiconductive polymer capable of luminescence in an optical device is provided. The polymer comprises a luminescent film-forming solvent processible polymer which contains cross-linking so as to increase its molar mass and to resist solvent dissolution, the cross-linking being such that the polymer retains semiconductive and luminescent properties.Type: ApplicationFiled: August 15, 2003Publication date: March 25, 2004Applicant: Cambridge Display Technology Ltd.Inventors: Andrew Bruce Holmes, Xiao-Chang Li, Stephen Carl Moratti, Kenneth Andrew Murray, Richard Henry Friend
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Publication number: 20030207152Abstract: The invention is directed to oxidized charge transport materials having hole transport capability in organic light emitting device (OLEDs). A charge transport compound including more than two triarylamine groups, or including at least one triarylamine group and at least one fluorene group, is partly complexed with an oxidant, such as a Lewis acid, preferably present in an amount between 0.2 and 20 percent by weight. The resulting charge transport materials exhibit good hole transport characteristics and film forming properties.Type: ApplicationFiled: April 18, 2002Publication date: November 6, 2003Applicant: Canon Kabushiki KaishaInventors: Bing R. Hsieh, Xiao-Chang Li, Alan Sellinger
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Patent number: 6626566Abstract: The present invention provides a compound or complex comprising at least two moieties, each moiety being comprised of two or more thiophenes fused directly to each other. Also provided is a method for the production of the compounds of the present invention, which method comprises the coupling of one fused thiophene derivative to another fused thiophene derivative.Type: GrantFiled: May 24, 2002Date of Patent: September 30, 2003Assignee: Cambridge Display Technology LimitedInventors: Andrew Bruce Holmes, Stephen Carl Moratti, Xiao-Chang Li, Henning Sirringhaus, Arno Kraft, Michael Mark Murray
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Publication number: 20030166810Abstract: Optical devices fabricated from solvent processible polymers suffer from susceptibility to solvents and morphological changes. A semiconductive polymer capable of luminescence in an optical device is provided. The polymer comprises a luminescent film-forming solvent processible polymer which contains cross-linking so as to increase its molar mass and to resist solvent dissolution, the cross-linking being such that the polymer retains semiconductive and luminescent properties.Type: ApplicationFiled: December 6, 2002Publication date: September 4, 2003Applicant: Cambridge Display Technology Ltd.Inventors: Andrew Bruce Holmes, Xiao-Chang Li, Stephen Carl Moratti, Kenneth Andrew Murray, Richard Henry Friend
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Publication number: 20030088112Abstract: The present invention provides a compound or complex comprising at least two moieties, each moiety being comprised of two or more thiophenes fused directly to each other. Also provided is a method for the production of the compounds of the present invention, which method comprises the coupling of one fused thiophene derivative to another fused thiophene derivative.Type: ApplicationFiled: May 24, 2002Publication date: May 8, 2003Applicant: Cambridge Display Techonology LimitedInventors: Andrew Bruce Holmes, Stephen Carl Moratti, Xiao-Chang Li, Henning Sirringhaus, Arno Kraft, Michael Mark Murray
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Patent number: 6559256Abstract: Optical devices fabricated from solvent processible polymers suffer from susceptibility to solvents and morphological changes. A semiconductive polymer capable of luminescence in an optical device is provided. The polymer comprises a luminescent film-forming solvent processible polymer which contains cross-linking so as to increase its molar mass and to resist solvent dissolution, the cross-linking being such that the polymer retains semiconductive and luminescent properties.Type: GrantFiled: April 28, 2000Date of Patent: May 6, 2003Assignee: Cambridge Display Technology Ltd.Inventors: Andrew Bruce Holmes, Xiao-Chang Li, Stephen Carl Moratti, Kenneth Andrew Murray, Richard Henry Friend