Lu F Liu

US Patent:

7256923, Aug 14, 2007

Filed:

Mar 1, 2005

Appl. No.:

11/070392

Inventors:

Lu Liu - Seattle WA, US
Chunye Xu - Seattle WA, US
Susan E. Legenski - Hermosa Beach CA, US
Minoru Taya - Mercer Island WA, US

Assignee:

University of Washington - Seattle WA

International Classification:

G02F 1/15

US Classification:

359265, 359273, 359267

Abstract:

Syntheses of a new blue EC monomer (ProDOT-MePro), and a new red EC monomer (ProDOP-Et2) are described. Two additional new types of EC monomers based on 3,4-alkylenedioxythiophene include fluorinated EC monomers and an EC monomer including silicon. EC polymer devices having more than one different color EC polymer to enable additional colors to be provided using subtractive color mixing are also described, as well as EC polymer devices incorporating a logo, image, or text, are generally obscured when the device is colored, but become visible when the device is not colored. Also described are EC polymer devices that include a cathodic EC polymer layer, a gel electrolyte, a counter electrode, and a reference electrode. Working prototypes of such devices exhibit significant increases in the speed of transition of the EC device from a colored state to a transparent state.

US Patent:

7298541, Nov 20, 2007

Filed:

Sep 9, 2005

Appl. No.:

11/223794

Inventors:

Lu Liu - Seattle WA, US
Chunye Xu - Seattle WA, US
Minoru Taya - Mercer Island WA, US

Assignee:

University of Washington - Seattle WA

International Classification:

G02F 1/15

US Classification:

359265

Abstract:

Three green EC materials based on thiophene, and a green EC material based on pyrazine are disclosed. A first thiophene derivative (2,3-Di-thiophen-2-yl-thieno[3,4-b]pyrazine), which was previously investigated as a nonlinear optical material, is here disclosed for its use as an EC material, and for its incorporation into an EC device. Synthesis of two new thiophene derivatives (2,5-di(thien-2-yl)-3,4-di(2,2,2-trifluoro-ethoxy)-thiophene and 2,5-(2,3-dihydro-thieno[3,4-b][1,4]dioxin-5-yl)-3,4-di(2,2,2-trifluoro-ethoxy)-thiophene), and a new pyrazine derivative (2,3-dibenzyl-5,7-di(thien-2-yl)thieno[3,4-b]pyrazine) are also disclosed, since these materials are all able to selectively change to a green color state, and can be polymerized to achieve a green EC polymer.

US Patent:

7450290, Nov 11, 2008

Filed:

Aug 13, 2004

Appl. No.:

10/917954

Inventors:

Chunye Xu - Seattle WA, US
Lu Liu - Seattle WA, US
Minoru Taya - Mercer Island WA, US

Assignee:

University of Washington - Seattle WA

International Classification:

G02F 1/15

US Classification:

359265, 359240, 359245

Abstract:

Electropolymerization of EC monomers is employed to obtain an EC polymer film deposited on a substrate. A first embodiment of a method to produce the film employs cyclic voltammetry alone, while a second embodiment deposits a very thin homogeneous layer using chronoamperometry, and then cyclic voltammetry is employed to increase the density of the film. Another aspect of the present invention is directed to specific web like configurations for a grid of conductive material deposited onto a transparent substrate. The web like configuration is based either on concentric circles, or on concentric ellipses. Yet another aspect of the present invention is directed to an imaging system including a digital window that is disposed between a prism and a patterned analytic layer.

US Patent:

7505191, Mar 17, 2009

Filed:

Jul 6, 2007

Appl. No.:

11/774438

Inventors:

Lu Liu - Seattle WA, US
Chunye Xu - Seattle WA, US
Susan E. Legenski - Hermosa Beach CA, US
Minoru Taya - Mercer Island WA, US

Assignee:

University of Washington - Seattle WA

International Classification:

G02F 1/153

US Classification:

359273, 359265, 528424, 548453, 549 29, 549 50

Abstract:

Syntheses of a new blue EC monomer (ProDOT-MePro), and a new red EC monomer (ProDOP-Et2) are described. Two additional new types of EC monomers based on 3,4-alkylenedioxythiophene include fluorinated EC monomers and an EC monomer including silicon. EC polymer devices having more than one different color EC polymer to enable additional colors to be provided using subtractive color mixing are also described, as well as EC polymer devices incorporating a logo, image, or text, are generally obscured when the device is colored, but become visible when the device is not colored. Also described are EC polymer devices that include a cathodic EC polymer layer, a gel electrolyte, a counter electrode, and a reference electrode. Working prototypes of such devices exhibit significant increases in the speed of transition of the EC device from a colored state to a transparent state.

US Patent:

7547658, Jun 16, 2009

Filed:

Oct 31, 2007

Appl. No.:

11/932834

Inventors:

Lu Liu - Seattle WA, US
Chunye Xu - Seattle WA, US
Susan E. Legenski - Hermosa Beach CA, US
Minoru Taya - Mercer Island WA, US

Assignee:

University of Washington - Washington DC

International Classification:

B01J 23/00

US Classification:

502353, 502209, 359265, 359266, 359269

Abstract:

Syntheses of a new blue EC monomer (ProDOT-MePro), and a new red EC monomer (ProDOP-Et2) are described. Two additional new types of EC monomers based on 3,4-alkylenedioxythiophene include fluorinated EC monomers and an EC monomer including silicon. EC polymer devices having more than one different color EC polymer to enable additional colors to be provided using subtractive color mixing are also described, as well as EC polymer devices incorporating a logo, image, or text, are generally obscured when the device is colored, but become visible when the device is not colored. Also described are EC polymer devices that include a cathodic EC polymer layer, a gel electrolyte, a counter electrode, and a reference electrode. Working prototypes of such devices exhibit significant increases in the speed of transition of the EC device from a colored state to a transparent state.

US Patent:

7675667, Mar 9, 2010

Filed:

Oct 16, 2008

Appl. No.:

12/253110

Inventors:

Chunye Xu - Seattle WA, US
Lu Liu - Seattle WA, US
Minoru Taya - Mercer Island WA, US

Assignee:

University of Washington - Seattle WA

International Classification:

G02F 1/15

US Classification:

359265, 359273, 359275

Abstract:

Devices including EC monomers polymerized using chronoamperometry to deposit a very thin homogeneous layer followed by cyclic voltammetry to increase the density of the EC polymer film. Another aspect of the present invention is directed to specific web like configurations for a grid of conductive material deposited onto a transparent substrate. The web like configuration is based either on concentric circles, or on concentric ellipses. Yet another aspect of the present invention is directed to an imaging system including a digital window that is disposed between a prism and a patterned analytic layer.

US Patent:

7808691, Oct 5, 2010

Filed:

Oct 22, 2007

Appl. No.:

11/876513

Inventors:

Lu Liu - Seattle WA, US
Chunye Xu - Seattle WA, US
Minoru Taya - Mercer Island WA, US

Assignee:

University of Washington - Seattle WA

International Classification:

G02F 1/15

US Classification:

359265, 359267, 549 29, 549 50, 548453

Abstract:

Green electrochromic (EC) materials based on thiophene, and a green EC material based on pyrazine are disclosed. A first thiophene derivative (2,3-Di-thiophen-2-yl-thieno[3,4-b]pyrazine), which was previously investigated as a nonlinear optical material, is here disclosed for its use as an EC material and for its incorporation into an EC device. Synthesis of two new thiophene derivatives (2,5-di(thien-2-yl)-3,4-di(2,2,2-trifluoro-ethoxy)-thiophene and 2,5-(2,3-dihydro-thieno[3,4-b][1,4]dioxin-5-yl)-3,4-di(2,2,2-trifluoro-ethoxy)-thiophene), and a new pyrazine derivative (2,3-dibenzyl-5,7-di(thien-2-yl)thieno[3,4-b]pyrazine) are also disclosed, since these materials are all able to selectively change state to appear a green color and can be polymerized to achieve a green EC polymer.

US Patent:

8154787, Apr 10, 2012

Filed:

Aug 27, 2010

Appl. No.:

12/870482

Inventors:

Lu Liu - Seattle WA, US
Chunye Xu - Seattle WA, US
Minoru Taya - Mercer Island WA, US

Assignee:

University of Washington - Seattle WA

International Classification:

G02F 1/15
C07D 335/04
C07D 409/04

US Classification:

359265, 359240, 359245, 359267, 359273, 528424, 548453, 549 23, 549 29, 549 50, 549 59

Abstract:

Green electrochromic (EC) materials based on thiophene, and a green EC material based on pyrazine are disclosed. A first thiophene derivative (2,3-Di-thiophen-2-yl-thieno[3,4-b]pyrazine), which was previously investigated as a nonlinear optical material, is here disclosed for its use as an EC material and for its incorporation into an EC device. Synthesis of two new thiophene derivatives (2,5-di(thien-2-yl)-3,4-di(2,2,2-trifluoro-ethoxy)-thiophene and 2,5-(2,3-dihydro-thieno[3,4-b][1,4]dioxin-5-yl)-3,4-di(2,2,2-trifluoro-ethoxy)-thiophene), and a new pyrazine derivative (2,3-dibenzyl-5,7-di(thien-2-yl) thieno[3,4-b]pyrazine) are also disclosed, since these materials are all able to selectively change state to appear a green color and can be polymerized to achieve a green EC polymer.