Emagin Corporation

Fed Corporation

Eastman-kodak Company

Amalkumar P Ghosh

Ilyas I Khayrullin

Fridrich Vazan

Tariq Ali

Evan P Donoghue

Kerry Tice

Qi Wang

Gary W Jones

Munisamy Anandan

Yachin Liu

Steven M Zimmerman

Laurie Sziklas

Ihor T Wacyk

Seonki Kim

Olivier F Prache

Hyuk Sang Kwon

Susan K Schwartz Jones

Olivier Prache

Hua Xia Ji

Andrew G Sculley

Steven A Van Slyke

Joel D Shore

Susan K Jones

Michael J Carmody

Christian M Heller

Ronald W Wake

Angelo G Pignata

Harrison Kwon

John Ho

Walter V Johnstone

Andrew Rosen

Chen Dong

Scott Ziesmer

Fangchao Zhao

Pixels and sub-pixels suitable for high-density displays are disclosed. High-density is realized by forming a top-gate thin-film transistor (TFT) directly on top of a light-emitting diode (LED), thereby reducing the real estate required. To enable the stacked structure, a planarization layer is formed such that its top surface is coplanar with the top surface of the top electrode of the LED. The source and drain of the TFT are then formed on the planarization layer and electrode such that electrical contact is made between the LED and the TFT. In some embodiments, the fabrication includes deposition of an additional planarization layer whose top surface is coplanar with the top surface of the gate of the TFT. This enables formation of a parallel-plate capacitor on the TFT/LED stack, thereby reducing the footprint of the pixel even further.

Monolithically integrated top-gate thin-film transistor and light-emitting diode and method of making

An OLED display system is provided having visual performance pixel compensation for loss of brightness, including display pixels, where each display pixel has OLED subpixels and pixel drive circuitry; a sensing system having sensors and analog to digital conversion circuitry connected to each of the sensors, and a processor to provide an image data drive signal to each of the display pixels, receive the sensor signal from the ADC circuitry for each sensor, estimate a state of degradation of at least one of the display pixels, determine a drive-signal compensation for each display pixel having an estimated state of degradation and compensate the image data drive signal to each display pixel having an estimated state of degradation. Methods for compensating pixels for an image in a display are also provided.

OLED-based display having pixel compensation and method

The present disclosure enables high-resolution direct patterning of a material on a substrate by establishing and maintaining a separation between a shadow mask and a substrate based on the thickness of a plurality of standoffs. The standoffs function as a physical reference that, when in contact between the substrate and shadow mask determine the separation between them. Embodiments are described in which the standoffs are affixed to an element selected from the shadow mask, the substrate, the mask chuck, and the substrate chuck.

Direct-deposition system including standoffs for controlling substrate-mask separation

An OLED display system having compensation or loss of brightness is provided, including OLED-based display pixels, a sensing system having sensors, a processor having an LIA, an LPF, and analog to digital circuitry connected to each sensor and for providing a sensor signal for each sensor. The processor is adapted to apply a drive signal having a periodic signal to at least one OLED pixel in the display, receive the sensor signal, provide a primary frequency component from the sensor signals using the LIA based on the periodic signal, provide secondary frequency components from the sensor signals using the LPF, convert the secondary frequency components to a digital signal using the ADC, provide the digital signal to the processor as a sensing signal, and determine compensation for the drive signal. A method is also provided.

Aspects of the present disclosure describe systems, methods, and structures that provide organic light-emitting diodes having high luminous efficiency and low electrical dissipation. Embodiments in accordance with the present disclosure include a top electrode normally comprising a single film that includes a pair of metals and one metal compound, where the metals include a precious metal in combination with an alkaline earth metal or rare-earth metal and the metal compound is an alkali metal compound. As a result, such a top electrode has a work function that is better matched for efficient electron injection than magnesium-silver alloy-based transparent electrodes known in the prior art.

Display comprising OLEDs having transparent top electrodes and method of forming same

A deposition system that mitigates feathering in a directly deposited pattern of organic material is disclosed. Deposition systems in accordance with the present disclosure include an evaporation source, an electrically conductive shadow mask, and an electrically conductive field plate. The source imparts a negative charge on vaporized organic molecules as they are emitted toward a target substrate. The source and substrate are biased to produce an electric field having field lines that extend normally between them. The shadow mask and field plate are located between the source and substrate and each functions as an electrostatic lens that directs the charged vapor molecules toward propagation directions aligned with the field lines as the charged vapor molecules approach and pass through them. As a result, the charged vapor molecules pass through the shadow mask to the substrate along directions that are substantially normal to the substrate surface, thereby mitigating feathering in the deposited material pattern.

Apparatus and method for direct patterning of an organic material using an electrostatic mask

A large area active-matrix organic light-emitting diode microdisplay and method for fabricating the same is provided which includes a panel having resolution of greater than 2,000 pixels per inch and a size of 1.4 or more inches for supporting the needs of virtual reality and augmented reality application.

Large area display and method for making same

A linear evaporation apparatus, system and method including a conductance chamber including a linear output section configured to emit a linear source deposition flux therethrough, an evaporative vapor communication conduit including an evaporative vapor mixing chamber and a plurality of crucible-receiving apertures at distal ends from the evaporative vapor mixing chamber, wherein the evaporative vapor mixing chamber is in communication with the conductance chamber and configured to transmit the linear source deposition flux therethrough, and a plurality of crucibles, each of the plurality of crucibles corresponding to one of the plurality of crucible-receiving apertures at the distal ends from the evaporative vapor mixing chamber, each of the plurality of crucibles configured to hold a material and heat the material to a corresponding material evaporation temperature, each of the plurality of crucibles further including a vapor pressure activated lid configured to open at a predetermined material vapor pressure value generated by heating the crucibles to at least the corresponding material evaporation temperature.

Linear source apparatus, system and method of use

A direct-deposition system forming a high-resolution pattern of material on a substrate is disclosed. Vaporized atoms from an evaporation source pass through a pattern of through-holes in a shadow mask to deposit on the substrate in the desired pattern. The shadow mask is held in a mask chuck that enables the shadow mask and substrate to be separated by a distance that can be less than ten microns. Prior to reaching the shadow mask, vaporized atoms pass through a collimator that operates as a spatial filter that blocks any atoms not travelling along directions that are nearly normal to the substrate surface. Vaporized atoms that pass through the shadow mask exhibit little or no lateral spread after passing through through-holes and the material deposits on the substrate in a pattern that has very high fidelity with the through-hole pattern of the shadow mask.

High-precision shadow-mask-deposition system and method therefor

In a method for designing and fabricating a micro-lens array, a design is finalized by varying certain features of a shadow mask, varying a distance between a source of lens-forming material and the shadow mask, and varying other parameters until the features and distances result in the formation of a micro-lens having desired shape, etc. A shadow mask in accordance with the design is then fabricated and is appropriately positioned with respect to a micro-display and a source of lens-forming material. A plume of lens-forming material is then generated under reduced pressure and which propagates toward the shadow mask, directly patterning the micro-lenses on sub-pixels of the micro-display.

Method of designing and fabricating a microlens array

A shadow mask that includes compensation layer operative for at least partially correcting gravity-induced sag of a shadow-mask membrane is disclosed. The compensation layer is formed on a surface of the shadow-mask membrane such that the compensation layer is characterized by a residual stress that gives rise to a first bending moment in the membrane, where the first bending moment is directed in the opposite direction to a second bending moment in the membrane that is induced by the effect of gravity.

Shadow mask comprising a gravity-compensation layer and method of fabrication

Aspects of the present disclosure are directed to systems, method, and structures including a high-resolution shadow mask with tapered aperture/pixel openings that advantageously overcomes problems plaguing the prior art namely shadowing, sagging, and fragility.

High resolution shadow mask with tapered pixel openings

Growing community of inventors

Hopewell Junction, NY, United States of America

Amalkumar P Ghosh