Abstract: A display including an electroluminescent layer, a liquid crystal layer, a barrier layer arranged between the electroluminescent layer and the liquid crystal layer to restrict migration of liquid crystal from the liquid crystal layer to the electroluminescent layer, and a first electrode and a second electrode arranged such that the electroluminescent layer and the liquid crystal layer are disposed between the first and second electrodes and arranged to apply an electric field across both the electroluminescent layer and the liquid crystal layer.

Abstract: An electroluminescent display comprising a mask defining the information to be displayed and an electroluminescent (EL) backlight. The mask compress a layer (13) of physically-stabilized liquid crystal switchable to define the information to be displayed mounted in front of an EL layer (16) of the backlight. At least one pair of electrodes (12, 20) are arranged to generate, in use, an electric field across both the EL layer (16) and the LC layer (13). A barrier layer (15) is provided between the LC layer (13) and the EL layer (16) that restricts migration of liquid crystal from the LC layer (13) to the EL layer (16).

Abstract: A display including an electroluminescent layer, a liquid crystal layer, and a first electrode and a second electrode arranged such that the electroluminescent layer and the liquid crystal layer are disposed between the first and second electrodes and arranged to apply an electric field across both the electroluminescent layer and the liquid crystal layer.

Abstract: A display including an electroluminescent layer, a liquid crystal layer, a barrier layer arranged between the electroluminescent layer and the liquid crystal layer to restrict migration of liquid crystal from the liquid crystal layer to the electroluminescent layer, and a first electrode and a second electrode arranged such that the electroluminescent layer and the liquid crystal layer are disposed between the first and second electrodes and arranged to apply an electric field across both the electroluminescent layer and the liquid crystal layer.

Abstract: A display comprising a flexible layered structure and a circuit layer. The layered structure comprises an active layer, comprising LC material and electroluminescent/phosphor material, switchable to define information to be displayed sandwiched between front and rear electrodes which are arranged to have an alternating voltage applied thereto to generate an electric field across the active layer. The display further comprises a substrate being the transparent front layer, a reflective insulating layer, an insulating layer mounted behind the rear electrode and a conductive plane mounted behind the insulating layer and connected to ground, to a DC voltage and/or to a same potential as the circuit layer. The circuit layer may comprise at least one switch to be activated by deflection of the layered structure.

Abstract: A control circuit for an electro luminescent display in which a flyback converter and an H-bridge are used to provide a high voltage alternating current to a capacitive load from a low voltage DC source. Each time the polarity of the capacitive load is reversed, the capacitive load discharges. This high voltage discharge is stored on a low voltage capacitor and subsequently used as an auxiliary power supply to power the switching elements of the control circuit.

Abstract: An electroluminescent layer for a light. The light includes a phosphor with a fluorescent pigment or dye.

Abstract: An electroluminescent display comprising a mask defining the information to be displayed and an electroluminescent (EL) backlight. The mask compress a layer (13) of physically-stabilised liquid crystal switchable to define the information to be displayed mounted in front of an EL layer (16) of the backlight. At least one pair of electrodes (12, 20) are arranged to generate, in use, an electric field across both the EL layer (16) and the LC layer (13). A barrier layer (15) is provided between the LC layer (13) and the EL layer (16) that restricts migration of liquid crystal from the LC layer (13) to the EL layer (16).

Abstract: An electroluminescent circuit for driving an electroluminescent display having a plurality of segment electrodes and a common electrode. The circuit comprises a DC power supply, an output terminal for each of the segments and common electrodes and at least one supply half H-bridge for connecting at least one of each of the segment electrodes and the common electrode selectively to one of the DC supply and a reference voltage. Each supply half H-bridge comprises a top switch and a bottom switch in series having a junction between them. The top switch is connected to the DC supply and the bottom switch is connected to a reference voltage. A discharge circuit is provided for selectively discharging the electroluminescent display, the discharge circuit comprising a discharge half H-bridge in which a top switch is connected to the DC supply and to a discharge path.

Abstract: An electroluminescent display comprising a substrate (1), a substantially transparent electrode (2) adjacent to the substrate, a layer of electroluminescent material (3) adjacent to the substantially transparent electrode, a layer of dielectric material (4) adjacent to the layer of electroluminescent material and a further electrode (5) adjacent to the dielectric layer, in which there is further provided an intermediate layer (6) between the substantially transparent electrode and the layer of electroluminescent material. The intermediate layer typically acts as a diffuser and may comprise Barium Titanate.

Abstract: A method of driving a display, wherein the display comprises a layer of electroluminescent material (EL) and a layer of physically-stabilised liquid crystal (LC) wherein the layers of EL and LC are powered by a common set of electrodes. The method comprises driving the common electrodes with a voltage waveform which is substantially a truncated triangular waveform.