Eastman-kodak Company

Oledworks Gmbh

Global Oled Technology LLC

Bruno Primerano

Yuan-Sheng Tyan

Fridrich Vazan

Thomas Richard Cushman

Donald Saul Rimai

Giuseppe Farruggia

George R Olin

John W Hamer

Mark Cameron Zaretsky

Michael Scott Garner

Steve Rapp

Jeffrey Jackson

Christopher J White

Gary Parrett

Felipe A Leon

Michael E Miller

Kevin M Johnson

Donald R Preuss

James A Barnard

Michael J Murdoch

Joseph F Laukaitis

David D Almeter

Guiseppe Farruggia

Micheal Scott Garner

Christopher Jason White

Felipe Antonio Leon

A flat and detachable electrical connection system between a flat lighting module and a lampholder is described. The flat lighting module comprises a lighting panel, control circuitry for controlling the lighting panel, and electrical contact pads connected to the control circuitry, all supported at least in part by a mechanical support plate; the mechanical support plate being at least partially enclosed in a housing with a provision or opening so that light can be emitted from the lighting panel; and where the mechanical support plate includes a male mechanical support connector section that extends out from the mechanical support plate in the same plane as the thickness of the lighting module; and where the male mechanical support connector section includes means for non-permanent locking or latching of the lighting module to the lampholder. The lampholder comprises a female mechanical connector into which the male mechanical support connector section of the lighting module engages and which includes means for non-permanent locking or latching of the male mechanical support connector section of the lighting module; and a male electrical extension that extends out from the female mechanical connector and which engages the electrical contact pads in the lighting module to supply electrical power or communication signals or both to the control circuitry when the lighting module and lampholder are connected. The lighting panel may be LED or OLED and the electrical connection system may be used in a luminaire or lamp.

Detachable electrical connection for flat lighting module

Non-reversible lampholder

Reversible lampholder

An electroluminescent (EL) panel with 2T1C subpixels is compensated for initial nonuniformity ('mura'). The current of each subpixel is measured at a selected time to provide a status signal representing the characteristics of the subpixel. A compensator receives a linear code value and changes it according to the status signals. A linear source driver drives the panel with the changed code values.

Electroluminescent display initial-nonuniformity-compensated drve signal

Apparatus for providing an analog drive transistor control signal to the gate electrode of a drive transistor in a drive circuit that applies current to an EL device, the drive circuit including a first supply electrode of the drive transistor and the EL device connected to a second supply electrode of the drive transistor, comprising a measuring circuit for measuring the current passing through the supply electrodes at different times to provide an aging signal representing variations in the characteristics of the drive transistor and EL device caused by operation of the drive transistor and EL device over time; a compensator for changing a linear code value in response to the aging signal to compensate for the variations in the characteristics of the drive transistor and EL device; and a linear source driver for producing the analog drive transistor control signal in response to the changed linear code value.

Electroluminescent display compensated analog transistor drive signal

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&#x2032;, B&#x2032;, 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&#x2032; based upon the common signals for the current and neighboring pixels; calculating the three color signals (R&#x2032;,G&#x2032;,B&#x2032;) by calculating a value of a function Fof the final common signal value S&#x2032; 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&#x2032;.

Method for transforming three colors input signals to four or more output signals for a color display

A WORM optical recording element comprising a substrate and a phase-change recording layer wherein the phase-change recording layer has a composition expressed by Sb X Sn Zn Si O S wherein X is an element selected from In, Ge, Al, Zn, Mn, Cd, Ga, Ti, Si, Te, Nb, Fe, Co, W, Mo, S, Ni, O, Se, Tl, As, P, Au, Pd, Pt, Hf,or V and a>0, b>0, c>0, d>0, e>0, f>0, h>0, and a &plus;b&plus;c&plus;d&plus;e&plus;f&plus;h&equals;100.

Phase-change recording element for write once applications

A WORM optical recording element comprising a substrate and a phase-change recording layer wherein the phase-change recording layer has a composition expressed by Sb In Sn Zn Si O S wherein a>0, b>0, c>0, d>0, e>0, f>0, h>0, and a&plus;b&plus;c&plus;d&plus;e&plus;f&plus;h&equals;100

A WORM optical recording element includes a substrate; an amorphous phase-change recording layer disposed over the substrate; a dielectric layer disposed adjacent to the amorphous phase-change layer; a reflector layer disposed adjacent to the dielectric layer; and wherein the material and the thickness of the layers are selected such that recording can be performed on the optical recording element by using a focused laser beam to form crystalline marks in the phase-change layer using laser pulses with less than 40 nS in duration, the reflectivity of the amorphous phase as measured by a collimated beam is higher than 28% and the contrast of the read-back signal is higher than 0.6, and the second and subsequent writing over previous recording results in at least a 50% increase in read out jitter.

A rewriteable phase-change optical recording element includes a substrate; and a recording layer over the substrate having at least two sub-layers of different chemical compositions, the compositions and thickness of the sub-layers being selected so that when subject to laser light during a writing process the compositions mixed together to form a high reflectivity mixed crystalline region without using any prior initialization or mixing processes.

Erasable phase change optical recording elements

A recording medium includes a transparent substrate; a crystalline phase-change layer provided over the transparent substrate; a dielectric layer provided over the phase-change layer; a metallic reflector layer provided over the dielectric layer; and the crystalline phase-change layer having a thickness and phase-change material selected so that data can be recorded in it on a first write, but on second or subsequent writes the written data results in at least a 50% increase in data jitter.

Phase-change recording medium for write once applications

A method and apparatus for determining the rate of development characteristic of electroscopic toner particles of the type used in electrostatographic recording to develop electrostatic images. The apparatus has a biased electrode for attracting toner particles and a microprocessor-based logic and control unit for sampling the mass of toner particles attracted to the electrode at preselected times during the accumulation of toner on the biased electrode. This development rate parameter is used by the logic and control unit to control process parameters (e.g. primary charging and exposure levels, development electrode bias, toner concentration) which affect image quality.

Method and apparatus for determining toner development rate

A method and apparatus for determining the charge-to-mass ratio of electroscopic toner particles of the type used in electrostatographic recording to develop electrostatic images. The apparatus uses a biased electrode for attracting toner particles thereto, and a microprocessor-based logic and control unit for sampling the mass of toner particles deposited on the electrode after the deposited toner particles have neutralized the electric field produced by the electrode bias. This toner mass information, together with certain toner constants and known parameters, is used by the logic and control unit to calculate the toner's charge-to-mass ratio. The output of the apparatus is useful for controlling process parameters (e.g. primary charging and exposure levels, development electrode bias, toner concentration) which affect image quality.

Method and apparatus for determining toner charge-to-mass ratio

A toner image is transferred to a heat softened first thermoplastic outer layer of a receiving sheet, which receiving sheet also has a second thermoplastic layer on its backside. The second layer has a higher heat softening point than the first layer. Transfer is effected by securing the receiving sheet to a roller having a metal surface in contact with the second layer and bringing the first layer into pressure contact with an image bearing member while heating the roller from within to a temperature sufficient to soften the first layer and the toner but not sufficient to cause release of the second layer onto the roller.

Heat assisted toner transferring method and apparatus

In electrostatographic apparatus, the ratio of toner particle electrostatic charge-to-toner particle mass and the development rate are determined by providing a piezo device positioned to interact with toner particles. The device is periodically electrically biased to attract toner particles, and the frequency shift of the piezo device due to the mass of attracted toner particles is detected. The electrostatic charge buildup on the electrode due to the attracted toner particles is detected to determine the mass of toner. The potential on the device may be changed periodically from a potential which attracts toner to a potential which repels toner to clean the device.

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Honeoye Falls, NY, United States of America

Bruno Primerano