Global Oled Technology LLC

Oledworks Gmbh

Eastman-kodak Company

Semprius, Inc.

Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Other

John W Hamer

Ronald S Cok

Michael E Miller

Charles I Levey

Christopher J White

Dustin Lee Winters

Gary Parrett

Christopher Andrew Bower

Etienne Menard

Michael Scott Garner

Bruno Primerano

John Ludwicki

Steve Rapp

Jeffrey Spindler

Jeffrey Jackson

Michael L Boroson

Andrew Daniel Arnold

Uwe Vogel

Bernd Richter

Philipp Wartenberg

Gerd Bunk

Marina Kondakova

Todd Mathew Spath

Michael J Murdoch

Paula J Alessi

Timothy Floyd Spencer

Felipe A Leon

Michael William Mattern

Janos Veres

Scott Stickel

Donald Preuss

Shane Matesic

Ronald Steven Cok

Micheal Scott Garner

Christopher Jason White

Felipe Antonio Leon

Michael W Mattern

A microdisplay comprising a light emitting OLED stack on top of a silicon-based backplane with individually addressable pixels and control circuitry wherein the light emitting OLED stack has three or more OLED units between a top electrode and a bottom electrode; and the control circuitry of the silicon-based backplane comprises at least two transistors with their channels connected in series between an external power source VDD, and the bottom electrode of the OLED stack. The light-emitting OLED stack preferably has a Vth of at least 7.5V or more. The control circuit can include a protection circuit comprised of a p-n diode, preferably a bipolar junction transistor.

Stacked OLED microdisplay with low-voltage silicon backplane

A display comprising a light emitting OLED stack on top of a silicon-based backplane with individually addressable pixels and control circuitry wherein the control circuitry of the silicon-based backplane comprises at least one driving transistor where a first terminal of the driving transistor is electrically connected to an external power source VDD, and the second terminal of the driving transistor is electrically connected to the bottom electrode of the OLED stack; wherein the gate of the driving transistor is controlled by a data signal which supplied by a scan transistor controlled by a signal from select line SELECT; and the control circuitry additionally comprises a protection circuit comprising a bipolar junction transistor. There can be a switch transistor between the scan transistor and the gate of the driving transistor for microdisplay applications. The OLED stack can comprise two or more OLED light-emitting units.

OLED display with protection circuit

An active-matrix display comprising a power source V; a pixel array of columns and rows, each light-emitting pixel having an individually controlled segmented electrode and an opposite electrode; a driving circuit comprising at least one data line that supplies a data signal for each pixel along a column, wherein the data signal controls the gate of a driving transistor whose source and drain are connected between the power source Vand the segmented electrode and at least one scan line that supplies a scan signal that controls the gate of a scan transistor that enables the loading of the data signal from the data line to the gate of the driving transistor for each pixel along a row; and a pixel control circuit in electrical contact with the segmented electrode wherein the pixel control circuit prevents light emission by the pixel based on the value of the data signal for that pixel. The pixel control circuit comprises a decision circuit which outputs a signal which controls a bypass transistor which prevents emission whenever the data signal indicates that the pixel should be non-emitting. This reduces crosstalk, particularly in OLED microdisplays.

Pixel circuit for crosstalk reduction

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

A multimodal light-emitting OLED microcavity device, comprising: an opaque substrate; a layer with a reflective surface over the substrate; a first electrode over the reflective surface; organic layers for light-emission including a second blue light-emitting layer closer to the reflective surface and a first blue light-emitting layer further from the reflective layer than the second blue light-emitting layer, where the distance between the midpoints of the second and first blue-light emitting layers is L, and at least one non-blue light-emitting layer; a semi-transparent second electrode with an innermost surface through which light is emitted; wherein the distance Lbetween the reflective surface and the innermost surface of the semi-transparent second electrode is constant over the entire light-emitting area; and the ratio L/Lis in the range of 0.30-0.40. The multimodal microcavity OLED has increased blue emission and is particularly useful for use as the light source in a microdisplay.

Multimodal microcavity OLED with multiple blue emitting layers

A method for making an OLED lighting panel is disclosed. A patterned inorganic insulating layer is used to enclose an area over a first electrode layer leaving portions of the first electrode layer and substrate adjacent to the outside of the enclosure exposed. After uniform deposition of the organic layer(s), the organic layer(s) are selectively removed over the inorganic insulating layer and an adjacent portion of the substrate to form a sealing region. After uniform deposition of the second electrode, the enclosed area is encapsulated and any overlying layers over the first and second electrodes outside the enclosed area are removed resulting in an OLED within the enclosed area with electrode contact pads outside the enclosed area. The OLED can be manufactured at low cost with no or limited use of shadow masking and is suitable for roll-to-roll processes.

Method for mask-free OLED deposition and manufacture

An OLED device comprising a substrate with a top surface; a first electrode covering the top surface of the substrate; a first insulating structure patterned over a portion of the first electrode where the pattern defines an inside area of the first electrode that is completely surrounded by the insulating structure, and an outside area of the first electrode not covered by the insulating structure; at least one organic layer for light emission within the inside area defined by the insulating structure; a second electrode over the at least one organic layer within the inside area defined by the insulating structure and at least partially over the first insulating structure; a cover slip located at least over the second electrode in the inside area defined by the insulating structure; and an electrically conductive solder seal making a hermetic seal between the insulating structure and the cover slip where the solder seal is in electrical contact with the second electrode. The insulating structure is desirably made of glass frit.

Solder hermetic sealing for OLEDs

Non-reversible lampholder

Reversible lampholder

A large-format substrate with distributed control elements is formed by providing a substrate and a wafer, the wafer having a plurality of separate, independent chiplets formed thereon; imaging the wafer and analyzing the wafer image to determine which of the chiplets are defective; removing the defective chiplet(s) from the wafer leaving remaining chiplets in place on the wafer; printing the remaining chiplet(s) onto the substrate forming empty chiplet location(s); and printing additional chiplet(s) from the same or a different wafer into the empty chiplet location(s).

High-yield fabrication of large-format substrates with distributed, independent control elements

An OLED display with a plurality of pixels for displaying an image having a target display white point luminance and chromaticity, each pixel including three red, green and blue gamut-defining emitters defining a display gamut and a magenta emitter with two of cyan, yellow or white emitters as three additional emitters which emit light within the display gamut; the display including a means for receiving a three-component input image signal; transforming the three-component input image signal to a six component drive signal; and providing the drive signal to display an image corresponding to the input image signal. One embodiment is where the pixels have red, green, blue, cyan, magenta and yellow colored subpixels.

OLED display with reduced power consumption

A display securely decrypts an encrypted image signal. Pixels are disposed between the display substrate and cover in a display area, and provide light to a user in response to a drive signal. Control chiplets disposed between the display substrate and cover in the display area are each connected to one or more of the plurality of pixels. Each receives a respective control signal and produce respective drive signal(s) for the connected pixel(s). A decryption chiplet is disposed between the display substrate and cover. It includes means for receiving the encrypted image signal and a decryptor for decrypting the encrypted image signal to produce a respective control signal for each of the control chiplets.

Display with secure decryption of image signals

An apparatus for depositing one or more organic material layers of an OLED lighting device upon a first region of a substrate and one or more conducting layers upon a second region, wherein the conducting layers partially or completely cover and extend beyond one side of the organic layers, comprising: a reusable mask in contact with the substrate, at least one mask open area having an overhang feature; one or more sources of vaporized organic material, selected to form layers of the OLED lighting device, and the vaporized organic material plume is shaped, on the side corresponding to the mask overhang feature, so as to limit substantial transfer of organic material on said side to angles less than or equal to a selected cutoff angle to the first region; and one or more sources of vaporized conducting material that transfer conducting material to the second region, wherein the second region partially or completely overlaps the first region and extends beyond the first region on the side corresponding to the overhang feature of the mask.

Apparatus and method for making OLED lighting device

Growing community of inventors

Rochester, NY, United States of America

John W Hamer