Ching Wan Tang

US Patent:

6348359, Feb 19, 2002

Filed:

Sep 22, 2000

Appl. No.:

09/667953

Inventors:

Steven A. Van Slyke - Pittsford NY
Ching W. Tang - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H01L 2100

US Classification:

438 29, 438 69, 438 70, 313504

Abstract:

Passive matrix and active matrix organic electroluminescent (EL) devices are fabricated by using a single mask which defines a deposition zone for depositing an organic EL medium layer and a cathode by directing respective vapor streams towards a substrate in the deposition zone. Electrically insulative organic shadowing structures are formed over cathode connectors for providing electrical contact between a cathode and a cathode connector in a position where the organic EL medium layer is spaced from a base of a shadowing structure. The electrical contact is achieved by directing an organic EL materials vapor stream towards the substrate in a direction substantially perpendicular to the substrate, and by directing a cathode materials vapor stream towards the substrate under a subtended angle.

US Patent:

6361886, Mar 26, 2002

Filed:

Dec 9, 1998

Appl. No.:

09/207703

Inventors:

Jianmin Shi - Webster NY
Ching W. Tang - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H05B 3300

US Classification:

428690, 313504, 25230116

Abstract:

An organic electroluminescent device, including an anode and cathode and therebetween a hole transport layer; and an electron tranport layer disposed in an operative relationship with the hole transport layer; wherein the hole transport layer includes at least an aromatic hydrocarbon or fused hydrocarbon containing at least 20 carbon atoms and having an ionization potential greater than 5. 0 eV.

US Patent:

6384529, May 7, 2002

Filed:

Nov 18, 1998

Appl. No.:

09/195298

Inventors:

Ching W. Tang - Rochester NY
Kee-Chuan Pan - Pittsford NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H05B 3314

US Classification:

313506, 313504, 313505

Abstract:

A full-color active matrix organic light-emitting color display panel is disclosed which has an integrated shadow mask structure for patterning arrays of color subpixels. The in-situ shadow mask structure is prepatterned on the display substrate by conventional photolithography, and provides a simple, self-alignment feature for successive deposition of color organic electroluminescent (EL) media on designated color subpixel areas. The pillar structure of the shadow mask are particularly effective in the fabrication of high-resolution full-color organic light-emitting diode displays having either color conversion layers or individual red, green, and blue emissive layers.

US Patent:

6465115, Oct 15, 2002

Filed:

Dec 9, 1998

Appl. No.:

09/208172

Inventors:

Jianmin Shi - Webster NY
Ching W. Tang - Rochester NY
Kevin P. Klubek - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H05B 3312

US Classification:

428690, 428917, 313504, 313506

Abstract:

An organic multilayer electroluminescent device including an anode and cathode, and including therebetween a hole transport layer; and an electron transport layer disposed in operative relationship with the hole transport layer; wherein the hole transport layer includes an organic compound having the formula: wherein: substituents R , R , R and R are each individually hydrogen, or alkyl of from 1 to 24 carbon atoms; aryl or substituted aryl of from 5 to 20 carbon atoms; or heteroaryl or substituted heteroaryl of from 5 to 24 carbon atoms; or fluorine, chlorine, bromine; or cyano group.

US Patent:

6475648, Nov 5, 2002

Filed:

Jun 8, 2000

Appl. No.:

09/589731

Inventors:

Tukaram K. Hatwar - Penfield NY
Gopalan Rajeswaran - Fairport NY
Ching W. Tang - Rochester NY
Jianmin Shi - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H05B 3314

US Classification:

428690, 428914, 428704, 313504, 313506, 25230116, 25230135, 257 40, 257103

Abstract:

An organic luminescent layer for use in an electroluminescent device with improved operating life includes an organic host material capable of sustaining both hole and electron injection and recombination. The layer also includes at least two dopants: a first dopant capable of accepting energy of electron-hole combinations in the host material; and a second dopant capable of trapping the holes from the host material. The first dopant being selected so that the bandgap energy of the first dopant is less than the bandgap energy of the host material and the second dopant being selected to have a hole trapping energy level above the valance band of the host material.

US Patent:

6570324, May 27, 2003

Filed:

Jul 19, 2000

Appl. No.:

09/618298

Inventors:

Lee W. Tutt - Webster NY
Myron W. Culver - Rochester NY
Mitchell S. Burberry - Webster NY
Ching W. Tang - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H01J 162

US Classification:

313500, 313498, 313111

Abstract:

An image display device includes a substrate; a sparse array of light emitting elements formed on one side of the transparent substrate, the light emitting element being selectively addressable to form an image; an array of lens-lets located on the opposite side of the substrate, the focal plane of the lens-lets being at the one side of the substrate and the lens-lets being arranged with respect to the light emitting elements such that the light emitted by the light emitting elements is directed by the respective lens-lets to intersect at a common region associated with a predetermined viewing distance; and the sparseness of the array of the light emitting elements being such that the ratio of the light emitting area of the light-emitting element under a lens-let to the total area of the lens-let is less than or equal to 0. 25.

US Patent:

6579629, Jun 17, 2003

Filed:

Aug 11, 2000

Appl. No.:

09/636494

Inventors:

Pranab K. Raychaudhuri - Rochester NY
Ching W. Tang - Rochester NY
Joseph K. Madathil - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H01L 5120

US Classification:

428690, 428917, 313504, 313506, 313503

Abstract:

An OLED device including a substrate, an anode formed of a conductive material over the substrate, and an emissive layer having an electroluminescent material provided over the anode. The OLED device also includes a buffer structure having at least two layers, a first buffer layer provided over the emissive layer and containing an alkaline halide and a second buffer layer provided over the first buffer layer and containing phthalocyanine, and a sputtered cathode layer having an alloy containing an alkaline metal provided over the buffer structure.

US Patent:

6596415, Jul 22, 2003

Filed:

Apr 26, 2001

Appl. No.:

09/842445

Inventors:

Jianmin Shi - Webster NY
Shiying Zheng - Rochester NY
Ching W. Tang - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H05B 3312

US Classification:

428690, 428917, 313504, 313506

Abstract:

An organic multilayer electroluminescent device including an anode and cathode, and comprising therebetween: a hole transport layer; and an electron transport layer disposed in operative relationship with the hole transport layer; wherein: the hole transport layer includes an organic compound having the formula: wherein: Ar is an aryl moiety; n is an integer of from 1 to 6; and substituents R and R are each individually hydrogen, or alkyl of from 1 to 24 carbon atoms; aryl or substituted aryl of from 5 to 28 carbon atoms; or heteroaryl or substituted heteroaryl of from 5 to 28 carbon atoms; or fluorine, chlorine, bromine; or cyano group.