Abstract: An illuminator comprises an elongate body; and engagement means for engaging a display cabinet shelf at a front edge. Light emitting diodes are mounted on inner surfaces of the body for product illumination. The diodes are mounted for mutually divergent and at least partially inwardly-directed fields of illumination. The diodes include a top set of diodes arranged for illumination above a shelf and a bottom set of diodes for illumination below a shelf. The illuminator may further comprise a light guide for direction of light from behind the diodes to an outer surface of the body, and the diodes being mounted on a transparent substrate. The body may comprise a label holder for supporting a label across an outer surface of the body.

Abstract: An illuminator (1) has two lines of LEDs (2) on inwardly-directed faces (7) of an elongate body (3) which forms a mullion for a display cabinet. Heat conduction through the body (3) to outer surfaces provides the durable effect of anti-sweat heating to prevent condensation in doors of the cabinet.

Abstract: An illuminator has two lines of LEDs on inwardly-directed faces of an elongate body which forms a mullion for a display cabinet. Heat conduction through the body to outer surfaces provides the durable effect of anti-sweat heating to prevent condensation in doors of the cabinet.

Abstract: A display case luminaire (30) comprises a linear housing, array (32) of LED light sources, and lens (33), wherein the lens provides a substantially uniform spread of light across a target plane even if the luminaire is located to emit light generally at an acute angle to the plane. The lens (33) is a Fresnel lens and has non-uniform optical characteristics in cross-section, with at least two different focal lengths. The linear housing comprises a visor (36) and a reflective surface (35) externally of the lens and a reflective surface (35) between the lens and the light source. A display case luminaire as claimed in any preceding claim, wherein the housing is configured for mounting back-to-back with another similar luminaire to provide a field of emission in the range of 150° to 180°. The housing is generally quadrant-shaped in cross-section, and the lens may be tilted with respect to the light source.

Abstract: A luminaire drive circuit (1) comprises an AC to DC power supply (2) delivering DC power to rails (3), and a plurality of LED drive circuits (4) connected across the rails to receive DC power. Each LED drive circuit (4) comprises a plurality of LEDs (7) in series and a voltage and current controller (6) for controlling current through the LEDs and a voltage across the LEDs which is less than the voltage across the rails. In one example, each LED circuit (4) has a dedicated sensor (52) to detect proximity of an illuminated object. This allows control of illumination intensity both for energy efficiency and visual effect. The proximity sensor may be simply a photodiode (52) mounted to detect extent of light reflected from the objects (FIG. 5), thus avoiding need for a self-contained proximity sensor such as one of the ultrasonic type.

Abstract: An illuminator has two lines of LEDs on inwardly-directed faces of an elongate body which forms a mullion for a display cabinet. Heat conduction through the body to outer surfaces provides the durable effect of anti-sweat heating to prevent condensation in doors of the cabinet.

Abstract: An illuminator (1) has two lines of LEDs (2) on inwardly-directed faces (7) of an elongate body (3) which forms a mullion for a display cabinet. Heat conduction through the body (3) to outer surfaces provides the durable effect of anti-sweat heating to prevent condensation in doors of the cabinet.