Cambridge Display Technology Limited

Other

Panasonic Corporation

X-celeprint Limited

Cambrdige Display Technology Limited

Julian Charles Carter

Stephen Karl Heeks

Jeremy H Burroughes

Alec G Gunner

Carl R Towns

Haydn Gregory

Ian S Millard

Jonathan J Halls

Paul Berger

Peter John Lyon

Ronald S Cok

Christopher Andrew Bower

Matthew Alexander Meitl

Richard Henry Friend

Ichio Yudasaka

Euan Christopher Smith

Karl Pichler

Thomas Kugler

Kenji Okumoto

Christopher Newsome

Arne Fleissner

Peter Devine

Christopher John Bright

Colin Baker

Surama Malik

Laurence Scullion

Martin Cacheiro

Colin Creighton

Hermann F Wittman

CJ Bright

The disclosed technology relates generally hybrid displays with pixels that include both inorganic light emitting diodes (ILEDs) and organic light emitting diodes (OLEDs). The disclosed technology provides a hybrid display that uses a mixture of ILEDs and OLEDs in each pixel. In certain embodiments, each pixel in the hybrid display includes a red ILED, a blue ILED, and a green OLED. In this instance, the OLED process would not require a high resolution shadow mask, thereby enhancing the manufacturability of OLEDs for larger format displays. Additionally, the OLED process in this example would not require any fine lithography. The OLED subpixel (e.g., green subpixel) can be larger and the ILEDs can be small (e.g., micro-red and micro-blue ILEDs). The use of small ILEDs allows for other functions to be added to the pixel, such as micro sensors and micro integrated circuits.

Micro assembled hybrid displays and lighting elements

This invention generally relates to an optoelectronic device and a method of fabricating such a device, and more particularly to an optoelectronic device comprising an anode layer, a semiconductive layer provided over the anode layer, and a cathode layer provided over the semiconductive layer, the anode layer comprising a plurality of electrically conductive tracks connected together and spaced apart from one another with gaps therebetween, the device further comprising a first and one or more further hole injection layers provided between the anode layer and the semiconductive layer and extending across said gaps, wherein the first hole injection layer has a conductivity greater than the conductivity of the one or more further hole injection layers.

Optoelectronic device

An organic electronic device structure, the structure comprising: a substrate; a base layer supported by said substrate and defining the base of a well for solvent-based deposition of organic electronic material; one or more spacer layers formed over said base layer; a bank layer formed over said spacer layer to define a side of said well; and wherein an edge of said well adjacent said base layer is undercut to define a shelf over said base layer, said shelf defining a recess to receive said organic electronic material.

Organic electronic device structures and fabrication methods

A display device comprising: a light switching unit comprising an array of pixels each operable to vary the transmission of light therethrough; and a backlight comprising a first series of regions of organic light-emissive material having a first emission color and a second series of regions of organic light-emissive material having a second emission color, each region of organic material being located so as to lie behind a plurality of pixels of the array in the viewing direction for backlighting those pixels; and at least one of the regions of organic light-emissive material being formed by a process of ink-jet deposition.

Backlit displays including organic light-emissive material

The present invention provides a method of manufacturing an organic thin film transistor (TFT), comprising: providing a substrate layer; providing a gate electrode layer; providing a dielectric material layer; providing an organic semiconductor (OSC) material layer; providing a source and drain electrode layer; and wherein one or more of the layers is deposited using a laser induced thermal imaging (LITI) process. Preferably the organic TFT is a bottom gate device and the source and drain electrodes are deposited on an organic semiconductor layer, or over a dielectric material layer using LITI. Further preferably a dopant material may be provided between the OSC material and the source and drain electrode layer, wherein the dopant material may also be deposited using LITI. Also preferably, wherein the dopant may be a charge neutral dopant such as substituted TCNQ or F4TCNQ.

Organic thin film transistors and methods of making them

An organic electroluminescence element having a cathode as a top electrode, and excelling in luminance efficiency, drive voltage, and operational life is provided. The organic electroluminescence element includes an anode over a substrate and a luminescent layer over the anode. The luminescent layer comprises an organic material. An electron injection layer is over the luminescent layer for injecting electrons into the luminescent layer. The electron injection layer is a metal including at least one of an alkaline metal and an alkaline earth metal. A fullerene layer is over the electron injection layer and includes fullerenes and at least one of an alkaline metal and an alkaline earth metal. The at least one of the alkaline metal and the alkaline earth metal included in the fullerene layer has a lower work function than a lowest unoccupied molecular orbit energy level of the fullerenes. A cathode is over the fullerene layer.

Organic electroluminescence element

A composition for ink jet printing an opto-electrical device, the composition comprising: an electroluminescent or charge transporting organic material; and a high boiling point solvent having a boiling point higher than water.

Solvents for PEDOT-solutions for ink-jet printing

An optocoupler including: a substrate comprising a photodetector; a transparent electrically-insulating layer disposed over the photodetector; and an organic electroluminescent device having an organic electroluminescent layer disposed between a first and a second electrode disposed over the transparent electrically-insulating layer; the photodetector arranged to detect light emitted from the organic electroluminescent device; wherein the optocoupler comprises a second current path between the first and second electrodes in addition to a first current path between the first and second electrode which in operation causes the organic electroluminescent layer to emit light.

Organic electroluminescent optocouplers

A light-emissive device comprising: a light-emissive region (); a first electrode () located on a viewing side of the light-emissive region for injecting charge carriers of a first type: and a second-electrode () located on a non-viewing side of the light-emissive region for injecting charge carriers of a second type; and wherein there is a reflectivity-influencing structure () located on the non-viewing side of the light-emissive region and including a light absorbent layer comprising graphite and/or a fluoride or oxide of a low work function metal.

Light-emissive device having co-evaporated cathode

A formulation for depositing a material on a substrate, the formulation comprising the material to be deposited on the substrate dissolved in a solvent system comprising a first solvent component having a relatively high boiling point and which exhibits a relatively low solubility with respect to the material to be deposited, and a second solvent component having a relatively low boiling point and which exhibits a relatively high solubility with respect to the material to be deposited.

Formulation and method for depositing a material on a substrate

A light-emissive device including: a light-emissive region (); a first electrode () located on a viewing side of the light-emissive region for injecting charge carriers of a first type; and a second-electrode () located on a non-viewing side of the light-emissive region for injecting charge carriers of a second type; and wherein there is a reflectivity-influencing structure () located on the non-viewing side of the light-emissive region and having a light absorbent layer including graphite and/or a fluoride or oxide of a low work function metal.

Display devices with reflectivity-influencing electrode

A light-emissive device including first and second electrodes, and a light-emissive layer located between the electrodes and containing organic light-emissive material including a plurality of particles spaced from each other by the light-emissive material, at least some of the particles being capable of injecting positive charge carriers into the light-emissive material and at least some of the particles being capable of injecting negative charge carriers into the light-emissive material; whereby electrical charge may pass between the electrodes via at least some of the particles to cause light to be emitted by the light-emissive material between those particles.

Multi-step organic light-emissive devices

An organic light-emitting device comprising a light-emissive organic layer interposed between first and second electrodes for injecting charge carriers into the light-emissive organic layer, at least one of said first and second electrodes comprising a plurality of layers including a first electrode layer having a high resistance adjacent the surface of the light-emissive organic layer remote from the other of the first and second electrodes, said first electrode layer comprising a high-resistance material selected from the group consisting of a mixture of a semiconductor material with an insulator material, a mixture of a semiconductor material with a conductor material and a mixture of an insulator material with a conductor material.

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Chesterton, United Kingdom

Julian Charles Carter