Abstract: A monomer for use in manufacturing a conjugated polymer, the monomer having a structure as shown formula (2): Ar1, Ar2 and Ar3 are independently selected from optionally substituted aryl or heteroaryl, X1 and X3 both independently comprise a leaving group capable of participating in polymerisation and Z represents a direct bond or an optionally substituted bridging atom.

Abstract: An organic light emissive device comprising: a first electrode; a second electrode; and an organic light emissive region between the first and second electrodes comprising an organic light emissive material which has a peak emission wavelength, wherein at least one of the electrodes is transparent and comprises a composite of a charge injecting metal and another material which is codepositable with the charge injecting metal, the other material having a different refractive index to that of the charge injecting metal and wherein the other material has a lower degree of quenching at the peak emission wavelength than the charge injecting metal whereby quenching of excitons by the at least one electrode is reduced, the charge injecting metal comprising either a low work function metal having a work function of no more than 3.5 eV or a high work function metal having a work function of no less than 4.5 eV.

Abstract: 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.

Abstract: A pixel driver architecture for an active matrix OLED display, the pixel driver architecture comprising a voltage-programmed master pixel programming circuit, and a first plurality of current-programmed slave pixel driver circuits, each coupled to said master pixel programming circuit.

Abstract: A process for the preparation of a polymerizable unit for production of a hole transporting polymer for use in an optical device, which process comprises reacting in the presence of S to form wherein each R is the same or different and is independently H or a substituent group; n is O or an integer from 1 to 100; Ar and Ar? are the same or different and are each aromatic or heteroaromatic groups which are substituted or unsubstituted; Y is a direct bond, a light emissive moiety, a hole transporting moiety or an electron transporting moiety; and X is a polymerizable group.

Abstract: A pulsed driven display comprising an organic light-emitting device, said device comprising an organic layer comprising a semiconductive polymer, said polymer comprising a fluorene or triarylamine repeat unit, the fluorene or triarylamine repeat unit having a group R pendent from the polymer backbone, wherein R has general formula I: where Ar1 represents phenyl or a group comprising napthyl; Ar2 represents phenyl or a group comprising napthyl; R? represents a substituent group; R?=H or a substituent; n=0, 1, 2 or 3; m=0 or 1; and n?=1 or 2, with the proviso that m=0 if n=0.

Abstract: A composition suitable for fabricating an electronic device such as an OLED using an ink-jet printing technique comprises a conducting or semi-conducting organic material and a solvent, the solvent having a boiling point of greater than 250° C. and a viscosity of less than 5 cPs. The composition preferably has a viscosity in the range between 0.1 and 20 cPs, and the solvent preferably has the formula: where R represents a C6 to C11 alkyl. The high boiling point of the solvent allows the “ink” to remain wet for a longer time after printing. This provides better process control during drying, resulting in more uniform films and greater control over the film profile. The low viscosity of the solvent enables jetting of the composition at high frequencies.

Abstract: Embodiments relate to systems and methods for displaying images using multi-line addressing (MLA) or total matrix addressing (TMA) techniques, with reduced noise. Embodiments of the invention are particularly useful for driving OLED (organic light emitting diode) displays.

Abstract: A device comprising an electroluminescent copolymer comprising a light-emitting repeat unit in the polymer backbone and wherein the repeat unit is conjugatively separate from the polymer backbone.

Abstract: A semiconductive polymer comprising a first repeat unit in the polymer backbone comprising general formula 1: where a=1 or 2; b=0 or 1; and c=0, 1 or 2, provided that when c=0 then b=0; Ar1, Ar2, Ar3, Ar4, Ar5, and Ar6 each independently represent an aryl or heteroaryl ring or a fused derivative thereof; characterized in that at least one of Ar1, Ar2, Ar4, and Ar5 is non-conjugating; and provided that (a) when a=1, Ar1 is not linked to Ar2 by a direct bond, (b) when b=1 and c=1, Ar4 is not linked to Ar5 by a direct bond, (c) when b=0 and c=1, Ar2 is not linked to Ar5 by a direct bond, (d) when a=2, the Ar1 groups are not linked by a single bond, and (e) when c=2, the Ar5 groups are not linked by a single bond.

Abstract: A method of manufacturing an organic thin film transistor, the method comprising: depositing a source and drain electrode; forming a thin self-assembled layer of material on the source and drain electrodes, the thin self-assembled layer of material comprising a dopant moiety for chemically doping an organic semi-conductive material by accepting or donating charge and a separate attachment moiety bonded to the dopant moiety and selectively bonded to the source and drain electrodes; and depositing a solution comprising a solvent and an organic semi-conductive material in a channel region between the source and drain electrode.

Abstract: An organic electroluminescent device having a plurality of pixels, the device comprising: an anode formed on a substrate; an organic electroluminescent layer formed on the anode in each well of a well-defining layer to form the plurality of pixels; a cathode layer on the electroluminescent layer and a layer of metal on the top surface of the well-defining layer; wherein a conductive layer is deposited over the cathode layer and the metal layer to electrically connect the cathode layer on the electroluminescent layer with the metal layer on the top surface of the well-defining layer.

Abstract: A luminescent polymer comprising a triarylene repeat unit which comprises a triarylene of general formula (I) which is substituted or unsubstituted and an arylene repeat unit -[-Ar-]- that is different from the triarylene repeat unit wherein X, Y, and Z are each independently O, S, CR2, SiR2 or NR and each R is independently alkyl, aryl or H.

Abstract: A method of making an electronic device comprising a double bank well-defining structure, which method comprises: providing an electronic substrate; depositing a first insulating material on the substrate to form a first insulating layer; depositing a second insulating material on the first insulating layer to form a second insulating layer; removing a portion of the second insulating layer to expose a portion of the first insulating layer and form a second well-defining bank; depositing a resist on the second insulating layer and on a portion of the exposed first insulating layer; removing the portion of the first insulating layer not covered by the resist, to expose a portion of the electronic substrate and form a first well-defining bank within the second well-defining bank; and removing the resist. The method can provide devices with reduced leakage currents.

Abstract: It is an object of the invention to provide a polymer compound that, when used in a light-emitting device, results in excellent luminance life for the obtained light-emitting device. The invention provides a polymer compound comprising a constitutional unit represented by formula (1). [In formula (1), R1A, R1B, R2A, R2B represent an unsubstituted alkyl group, R3 and R4 represented an unsubstituted or substituted alkyl group, an unsubstituted or substituted alkoxy group, an unsubstituted or substituted aryl group, an unsubstituted or substituted aryloxy group, an unsubstituted or substituted heterocyclic group, an unsubstituted or substituted silyl group, a halogen atom, an alkoxycarbonyl group, a carboxyl or a cyano group, and R5 and R6 represent an unsubstituted or substituted alkyl group, an unsubstituted or substituted alkoxy group or an unsubstituted or substituted aryl group. The letters a, b, c and d each represent an integer of 0 to 3.

Abstract: 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 colour and a second series of regions of organic light-emissive material having a second emission colour, 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.

Abstract: An organic optoelectronic device, such as an organic light emitting device, includes an anode, a cathode and an active organic layer between the anode and the cathode. The cathode includes a layer including a strontium compound, a first conductive layer over the layer including a strontium compound, and a second conductive layer over the first conductive layer, and provides a stable device.

Abstract: This invention relates to pixel driver circuits for active matrix optoelectronic devices, in particular OLED (organic light emitting diodes) displays. We describe an active matrix optoelectronic device having a plurality of active matrix pixels each said pixel including a pixel circuit comprising a thin film transistor (TFT) for driving the pixel and a pixel capacitor for storing a pixel value, wherein said TFT comprises a TFT with a floating gate.

Abstract: A conductive composition for use in an organic light-emitting device comprising: a polycation having a conjugated backbone; a polyanion to balance the charge on the polycation; and a semiconductive hole transport polymer containing side groups pendant from the polymer backbone, each side group comprising one or more groups XY, where XY represents a group with a high dissociation constant such that it is ionized completely.

Abstract: Embodiments include a hardware accelerator for non-negative matrix factorization (NMF), in particular for driving an OLED display. The hardware accelerator determines a oair of factor matrices (R;C) which when multiplied together approximate a target matrix. Each factor matrix R, C has multiple data buses each associated with a respective block of memory and there is a matrix of processor blocks and an associated memory block storing a portion of a matrix (Q) representing a difference between a product of the pair of factor matrices and the target matrix. Control circuitry controls the reading and writing of data between the various elements to perform the matrix factorisation.