Abstract: A ceramic green wavelength conversion element (120) is coated with a red wavelength conversion material (330) and placed above a blue light emitting element (110) such that the ceramic element (120) is attached to the light emitting element (110), thereby providing an efficient thermal coupling from the red and green converters (330, 120) to the light emitting element (110) and its associated heat sink. To protect the red converter coating (330) from the effects of subsequent processes, a sacrificial clear coating (340) is created above the red converter element (330). This clear coating (340) may be provided as a discrete layer of clear material, or it may be produced by allowing the red converters to settle to the bottom of its suspension material, thereby forming a converter-free upper layer that can be subjected to the subsequent fabrication processes.

Abstract: An electronic device (10) comprises a substrate (100) carrying a single electrode structure (120) and a plurality of electro-optical elements (140; 160, 180). The plurality of electro-optical elements (140, 160, 180) at least includes a first electro-optical element (140) covering a first part of the electrode structure (120), the first electro-optical element (140) comprising a first electrooptical material with a first transmission/voltage response characteristic and a second electro-optical element (160) covering a second part of the electrode structure (120), the second electro-optical element (160) comprising a second electro-optical material with a second transmission/vokage response characteristic. Consequently, the various electro-optical elements (140; 160 180) can be individually controlled with a single electrode structure by applying variable voltages.

Abstract: A method is provided of producing an active matrix display device having an optical layer comprising a mixture of an electro-optical material and a polymer precursor. An upper layer of the active plate is processed in dependence on a difference between the transmission or reflection characteristics of the row and column conductors and of the pixel electrodes, thereby to process the upper layer in dependence on the row and column pattern or the pixel electrode pattern. The optical layer is then exposed from above the substrate to a stimulus for polymerizing the polymer precursor into a discrete polymer surface layer, thereby enclosing the electro-optical material between the polymerized material and the active plate to define display pixels. Enclosed bodies of electro-optical material defining display pixels are defined in a pattern defined by the processing of the upper layer.

Abstract: The present invention discloses an electronic device (100) comprising a substrate (10) carrying an electrode structure (12); an electro-optical stack (90) at least partially covering the electrode structure (12), the electro-optical stack comprising a stratified polymer layer (44), a further substrate (20) and an electro-optical material (32) sandwiched between the polymer layer (44) and the further substrate (20); and an adhesive layer (60) between the substrate (10) and the electro-optical stack, as well as a method for producing such an electronic device (100), in which the electro-optical stack (90) and the substrate (10) are prepared in separate processes and combined by an adhesive layer (60). This improves the yield of such an electronic device (100), because a production error in one of the components no longer leads to the loss of the whole electronic device (100).

Abstract: An active matrix display device has an optical layer (7,9,11) comprising a mixture of an electro-optical material and a polymer precursor. An upper surface of the active plate comprises an array of wells (70) such that the upper surface has higher (72) and lower regions, and the optical layer mixture is provided over the active plate. The optical layer is exposed to a stimulus for polymerizing the polymer precursor into a polymer layer constituted by a top surface (9) and by side walls (11), thereby enclosing the electro-optical material between the polymerized material and the active plate to define display pixels. Enclosed bodies of electro-optical material defining display pixels are thus provided over the lower regions. This method uses the processing of the active plate to define wells (70) which provide a height difference which can be used to provide alignment of enclosed display pixels cells. This avoids the need for an alignment mask during the deposition and exposure of the optical layer.

Abstract: The multi-colour liquid crystal display device (1) of the present invention has a plurality of discrete liquid crystal elements (110, 130, 150) that are carried by a surface of a carrier (10). The liquid crystal elements (110, 130, 150), which cover respective parts of the electrode structure (12), each have a polymer layer (114, 134, 154), which encloses a cholesteric liquid crystal material (102, 122, 142) between the polymer layer and the surface of the carrier (10). The discrete liquid crystal elements (110, 130, 150) have been formed by the individual deposition of discrete droplets of a liquid comprising the various cholesteric liquid crystal materials (102, 122, 142) and a polymer precursor followed by exposure of the droplets to a stimulus triggering the polymerization of the polymer precursor.

Abstract: The electronic device (1) of the present invention has a carrier (10) with a plurality of discrete electro-optical elements (110, 130, 150) mounted on the surface of the carrier (10). The electro-optical elements (110, 130, 150), which cover respective parts of the electrode structure (12) on the surface of the carrier (10), each have a polymer layer (114, 134, 154), which encloses an electro-optical material (102, 122, 142) between the polymer layer (114, 134, 154) and the surface of the carrier (10). The discrete electro-optical elements (110, 130, 150) have been formed by the individual deposition of discrete droplets of a liquid comprising the electro-optical material and a polymer precursor followed by exposure of the droplets to a stimulus triggering the polymerization of the polymer precursor.

Abstract: A polymeric stratified-phase-separated composite (6) which is mechanically robust and simple to manufacture comprises a film of liquid (7), a layer of polymerized material (9) covering the thin film of liquid and supporting members (11) formed of polymerized material and extending from the layer of polymerized material through the thin film of liquid. The supporting members extend onto selected first regions (5b) of a substrate surface (5). The substrate surface has, laid our in accordance with a predetermined pattern, selected first (5b) and second (5a) regions. The first are functionalized for selective accumulation of the liquid. In one embodiment the first and second regions are regions of high and low affinity for polymerizable material respectively. In another, a difference in rate of polymerization is induced by using for example different concentrations of polymerization inhibitor in the first and second regions.

Abstract: This invention relates to a liquid crystal display device, comprising at least one retardation film (4), a nematic liquid crystal layer (5), and a light reflecting RGB patterned cholesteric colour filter (6), for reflecting either essentially left-circular or right-circular polarised light, being characterised in that said liquid crystal layer (5) is a super twisted nematic liquid crystal layer having a twist angle in the interval 180-270 degrees, and in that the summed retardation R of the retardation film or retardation films and the liquid crystal layer is equal to approximately R=(3+2n)?/4, where n=0,1,2,3.