Abstract: A technique comprising: providing a workpiece including a stack of layers defining an array of transistors including organic semiconductor channels, wherein the stack of layers comprises an upper conductor pattern (8) defining an array of upper conductor elements, each in contact with a respective lower conductor element (6) of a lower conductor pattern in via-hole regions (10); the method comprising: processing the workpiece by forming over the upper conductor pattern a plugging layer that raises the upper surface level of the workpiece in at least the via-hole regions whilst leaving at least a portion of each upper conductor element exposed; and providing an optical medium (36) over the upper conductor pattern without first forming an inorganic moisture barrier layer on the upper surface of the workpiece.

Abstract: A display device, comprising: a control component for electrically controlling the intensity of light transmitted therethrough from a backlight; and an optical component between said backlight and said control component configured to convert input light exhibiting at least one directional property substantially uniformly across an area at an input side of the optical component to output light exhibiting a substantial variation in said at least one directional property across a corresponding area at an output side of the optical component.

Abstract: An imager is provided. The imager has an imaging platen which presents an imaging surface against which an object to be imaged can be placed. The imaging platen has a photodetector layer and a light guiding layer operable to guide light towards the object. The imager includes a light source operable to emit light into the light guiding layer. The light source is located at an edge of the light guiding layer, to guide light into the light guiding layer of the imaging platen.

Abstract: A display for mounting on a curved surface. The display includes a display stack comprising a substrate to conform to a curved surface; a pixelated display medium on the substrate; and a parallax barrier. The parallax barrier may comprise a pattern of light blocking elements to restrict viewing of pixels of the display medium to a viewing angle. In some implementations the parallax barrier may be configured so that positions of the light blocking elements, with respect to the pixels, change with lateral position on the display.

Abstract: A display for mounting on a curved surface includes a display stack comprising a substrate to conform to a curved surface; a pixelated LCD (Liquid Crystal Display) display medium on the substrate; and a back light to illuminate the LCD display medium. The display stack also comprises a brightness enhancing film between the back light and the LCD display medium. The brightness enhancing film comprises a plurality of prisms to increase the brightness of light from the back light in a viewing direction. Shapes of the prisms change with lateral position on the display, to compensate for a change in viewing angle with lateral position on the display with respect to a curved surface of the display when the display is mounted on a curved surface.

Abstract: A pixel driver circuit having only three conductive layers is described. The pixel driver circuit comprises a vertical driver transistor (26) spanning said three conductive layers, wherein a first of said conductive layers (22) on a first side of a middle conductive layer (32) provides a first source-drain connection (52) of said driver transistor, wherein a third of said conductive layers (34) on the opposite side of said middle conductive layer to said first conductive layer provides a gate connection (54) for said vertical driver transistor, and wherein said middle conductive layer provides a second source-drain connection (50) for said vertical driver transistor. The circuit also comprises a lateral switching transistor (30) with source-drain connections (44,46) in one of said three conductive layers.

Abstract: A pixel driver circuit having only three conductive layers is described. The pixel driver circuit comprises a vertical driver transistor (26) spanning said three conductive layers, wherein a first of said conductive layers (22) on a first side of a middle conductive layer (32) provides a first source-drain connection (52) of said driver transistor, wherein a third of said conductive layers (34) on the opposite side of said middle conductive layer to said first conductive layer provides a gate connection (54) for said vertical driver transistor, and wherein said middle conductive layer provides a second source-drain connection (50) for said vertical driver transistor. The circuit also comprises a lateral switching transistor (30) with source-drain connections (44,46) in one of said three conductive layers.