Michael J Murdoch

US Patent:

6747618, Jun 8, 2004

Filed:

Aug 20, 2002

Appl. No.:

10/224239

Inventors:

Andrew D. Arnold - Hilton NY
Michael E. Miller - Rochester NY
Michael J. Murdoch - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G09G 330

US Classification:

345 77, 345 76, 313504, 313500, 3151693, 3151694

Abstract:

An improved OLED color display device, in which a display pixel has a plurality of subpixels of different colors, wherein the areas of the subpixels are different in size based on the emission efficiency of the emissive elements and the chromaticity of a target display white point, thereby protecting the subpixels whose emission efficiency is low from prematurely deteriorating, wherein the improvement comprises the relative sizes of the subpixels being further based on the relative luminance stability over time of the subpixels, thereby further extending the useful lifetime of the display.

US Patent:

6885380, Apr 26, 2005

Filed:

Nov 7, 2003

Appl. No.:

10/703748

Inventors:

Bruno Primerano - Honeoye Falls NY, US
Michael E. Miller - Honeoye Falls NY, US
Michael J. Murdoch - Rochester NY, US

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G09G005/02

US Classification:

345589, 345 82

Abstract:

A method for transforming three color input signals (R, G, B) corresponding to three gamut defining color primaries to four color output signals (R′, G′, B′, W) corresponding to the gamut defining color primaries and one additional color primary W for driving a display having emitters that emit light corresponding to the to the four color output signals including calculating a common signal value S as a function Fof the three color input signals (R,G,B) for a current and neighboring pixels; determining a final common signal value S′ based upon the common signals for the current and neighboring pixels; calculating the three color signals (R′,G′,B′) by calculating a value of a function Fof the final common signal value S′ and adding it to each of the three color input signals (R,G,B); and calculating the output signal W as a function Fof the final common signal value S′.

US Patent:

6897876, May 24, 2005

Filed:

Jun 26, 2003

Appl. No.:

10/607374

Inventors:

Michael J. Murdoch - Rochester NY, US
Michael E. Miller - Rochester NY, US
Ronald S. Cok - Rochester NY, US

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H04N009/67
G09G001/28
G09G003/14
G09G005/02
G06K009/00

US Classification:

345589, 345593, 345597, 345 22, 345 39, 345 46, 345 84, 382162, 382167, 348161, 358518

Abstract:

A method for transforming three color input signals (R, G, B) corresponding to three gamut defining color primaries to four color output signals (R′, G′, B′, W) corresponding to the gamut defining color primaries and one additional color primary W for driving a display having a white point different from W includes the steps of: normalizing the color input signals (R,G,B) such that a combination of equal amounts in each signal produces a color having XYZ tristimulus values identical to those of the additional color primary to produce normalized color signals (Rn,Gn,Bn); calculating a common signal S that is a function F1 of the three normalized color signals (Rn,Gn,Bn); calculating a function F2 of the common signal S and adding it to each of the three normalized color signals (Rn,Gn,Bn) to provide three color signals (Rn′,Gn′,Bn′); normalizing the three color signals (Rn′,Gn′,Bn′) such that a combination of equal amounts in each signal produces a color having XYZ tristimulus values identical to those of the display white point to produce three of the four color output signals (R′,G′,B′); and calculating a function F3 of the common signal S and assigning it to the fourth color output signal W.

US Patent:

6911961, Jun 28, 2005

Filed:

Oct 11, 2002

Appl. No.:

10/269428

Inventors:

Michael E. Miller - Rochester NY, US
Andrew D. Arnold - Hilton NY, US
Paul J. Kane - Rochester NY, US
Michael J. Murdoch - Rochester NY, US

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G09G003/32

US Classification:

345 82, 345 83, 345 76, 3151693, 428690

Abstract:

A method of making an improved color OLED display device, includes the steps of: identifying a plurality of different OLED materials having differing chromaticity coordinates, luminance stability over time, and luminance efficiency; calculating an estimate of display lifetime for a plurality of combinations of the different OLED materials used to produce a pixel having a white point with a defined chromaticity coordinate and luminance; and selecting the combination having the maximum lifetime.

US Patent:

7075242, Jul 11, 2006

Filed:

Mar 29, 2004

Appl. No.:

10/812786

Inventors:

Michael E. Miller - Honeoye Falls NY, US
Ronald S. Cok - Rochester NY, US
Andrew D. Arnold - Hilton NY, US
Michael J. Murdoch - Rochester NY, US

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G09G 3/10

US Classification:

3151693, 3151691, 315292, 315297, 345204, 345690, 345 83, 345 84

Abstract:

An OLED display system includes an OLED display including an array of light emitting pixels, each pixel having a plurality of OLEDs for emitting different colors of light specifying a gamut and including at least one additional OLED within the gamut defined by the other OLEDs and wherein one of the OLEDs has a power efficiency or lifetime different from the power efficiency or lifetime of at least one of the other OLEDs; a control signal; and a display driver for receiving a color display signal representing a relative luminance and color to be produced for each pixel of the display and generating a converted color display signal for driving the OLEDs in the display at the relative luminance and color, wherein the display driver is responsive to the control signal for controlling the in-gamut mixing ratio of the OLEDs to reduce power consumption or increase lifetime of at least one of the OLEDs.

US Patent:

7091941, Aug 15, 2006

Filed:

Apr 11, 2003

Appl. No.:

10/412534

Inventors:

Andrew D. Arnold - Hilton NY, US
Ronald S. Cok - Rochester NY, US
Michael E. Miller - Rochester NY, US
Michael J. Murdoch - Rochester NY, US

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G09G 3/32

US Classification:

345 83, 345 46, 345 48, 345 76, 345 84

Abstract:

A color OLED display includes an array of light emitting pixels, each pixel having three light emitting elements for emitting red, green, and blue colors of light specifying a gamut and at least one additional element for emitting a color of light within the gamut and wherein the power efficiency of the additional element is higher than the power efficiency of at least one of the red, green, and blue elements; and wherein the light emitting elements in the pixel are arranged in a two-by-two array having the green light emitting element and the additional element diagonally opposed to each other at two opposite corners of the two-by-two array and having the red and blue light emitting elements diagonally opposed to each other at the other two opposite corners of the two-by-two array, and wherein the additional element is larger than at least one of the red, green or blue light emitting elements.

US Patent:

7184067, Feb 27, 2007

Filed:

Mar 13, 2003

Appl. No.:

10/387953

Inventors:

Michael E. Miller - Rochester NY, US
Ronald S. Cok - Rochester NY, US
Andrew D. Arnold - Hilton NY, US
Michael J. Murdoch - Rochester NY, US

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G09G 5/02

US Classification:

345696, 345694, 345690, 3151693

Abstract:

An OLED display system includes a display device having an array of light emitting pixels, each pixel having a plurality of OLEDs for emitting different colors of light specifying a gamut and at least one additional OLED for emitting a color of light within the gamut, wherein the power efficiency of the additional OLED is higher than the power efficiency of at least one of the plurality of OLEDs; means for generating a control signal indicating an amount of contribution to the light output of the display provided by the additional OLEDs; and a display driver for receiving a standard color image signal representing relative luminance and color to be produced for each pixel of the display and generating a converted color image signal for driving the OLEDs in the display, the display driver being responsive to the control signal for controlling an amount of light produced by the additional OLEDs such that the power efficiency of the display may be increased and/or the rate of degradation of the display device may be decreased.

US Patent:

7230594, Jun 12, 2007

Filed:

Dec 16, 2002

Appl. No.:

10/320195

Inventors:

Michael E. Miller - Rochester NY, US
Ronald S. Cok - Rochester NY, US
Andrew D. Arnold - Hilton NY, US
Michael J. Murdoch - Rochester NY, US

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G09G 3/32

US Classification:

345 82, 345 83, 345 84, 345 76, 345 77, 345690, 3151691, 3151693

Abstract:

An OLED display device includes an array of light emitting pixels, each pixel having three or more OLEDs for emitting different colors of light specifying a gamut and at least one additional OLED for emitting a color of light within the gamut, wherein the power efficiency of the additional OLED is higher than the luminance efficiency of at least one of the three or more OLEDs; and means for driving the OLEDs in the pixels to produce a given color and luminance at a reduced power usage.