Abstract: The present invention provides an improved lighting system with built-in intelligence and a controlling unit. The controlling unit is provided with a sensor such as occupancy sensors or photo sensors as an intelligent system. The system allows the LED lamp to dim itself in response to autonomous or external stimuli. The apparatus also includes light emitting diode array and a power harvesting means for harvesting power from the LED lamp.

Abstract: A retrofit LED lighting system with a combination of a directional downlight component and an indirect uplight component is provided. The system comprises light emitting diodes arranged so as to replicate the function of a legacy light source in a transparent or translucent fixture housing. The LED lamp includes upwards facing LEDs emitting light upwards, and a translucent stem covering the uplight LEDs to allow the light from the LEDs to pass through it. Advantageously, the LED lamp with uplight component and a transparent/translucent stem allows the light to be directed upwards and hence, avoids having a sharp cut-off of light appearing in the middle of the reflector fixture and also avoids a lack of uplight shone on the ceiling.

Abstract: An embodiment of the present invention provides a retrofit LED lamp that is operated by a dual mode circuit, enabling maximum compatibility with the ANSI reference ballasts to satisfy UL requirements to replace HID and fluorescent lamps. The LED lamp operates at two different modes, offered by the dual mode PCB circuit. In one of the mode, namely ANSI ballast testing, a low frequency current from the ballast is throttled through a bypass circuit to LEDs, since a field effect transistor of the circuit is in open circuit mode due to insufficient current. During the second mode, namely field ballast operation, a high frequency current is provided by the ballast, which short circuits the FET, causing it to conduct and thus operating the LEDs. Advantageously, the LED lamp offers maximum compatibility with ballasts using such dual mode circuit and consumes less power.

Abstract: An embodiment of the present invention provides a retrofit LED lamp that is operated by a dual mode circuit, enabling maximum compatibility with the ANSI reference ballasts to satisfy UL requirements to replace HID and fluorescent lamps. The LED lamp operates at two different modes, offered by the dual mode PCB circuit. In one of the mode, namely ANSI ballast testing, a low frequency current from the ballast is throttled through a bypass circuit to LEDs, since a field effect transistor of the circuit is in open circuit mode due to insufficient current. During the second mode, namely field ballast operation, a high frequency current is provided by the ballast, which short circuits the FET, causing it to conduct and thus operating the LEDs. Advantageously, the LED lamp offers maximum compatibility with ballasts using such dual mode circuit and consumes less power.

Abstract: The present invention provides an improved lighting system, for an LED lamp, with built-in intelligence and a controlling unit. The controlling unit comprises one or more field effect transistors and a microcontroller. The microcontroller creates a pulse width modulated signal at a frequency of approximately 120 Hz-50 kHz to field effect transistors. Further, the field effect transistors are connected in series with the LED lamp so that the microcontroller modulates a switching power converter, in addition to modulating a parallel field effect transistor.

Abstract: A retrofit LED lighting system for replacement of existing metal halide lamp driven by magnetic ballast is provided. The retrofit lamp includes a circuit that converts the AC current supplied by magnetic ballast to DC current required for illuminating the LEDs.

Abstract: A retrofit LED lighting system with a combination of a directional downlight component and an indirect uplight component is provided. The system comprises light emitting diodes arranged so as to replicate the function of a legacy light source in a transparent or translucent fixture housing. The LED lamp includes upwards facing LEDs emitting light upwards, and a translucent stem covering the uplight LEDs to allow the light from the LEDs to pass through it. Advantageously, the LED lamp with uplight component and a transparent/translucent stem allows the light to be directed upwards and hence, avoids having a sharp cut-off of light appearing in the middle of the reflector fixture and also avoids a lack of uplight shone on the ceiling.

Abstract: An edge lit LED tube that can control light compatible with different ballast such as instant start, rapid start and programmed start is provided. The edge lit LED tube can tune the output light angle by controlling the etching of the acrylic light guide. An edge lit LED tube that has no minimum LED count and can be driven from a single LED is further provided.

Abstract: The present invention provides an improved lighting system with built-in intelligence and a controlling unit. The controlling unit is provided with a sensor such as occupancy sensors or photo sensors as an intelligent system. The system allows the LED lamp to dim itself in response to autonomous or external stimuli. The apparatus also includes light emitting diode array and a power harvesting means for harvesting power from the LED lamp.

Abstract: A retrofit LED lighting system for replacement of existing metal halide lamp driven by magnetic ballast is provided. The retrofit lamp includes a circuit that converts the AC current supplied by magnetic ballast to DC current required for illuminating the LEDs.

Abstract: A retrofit LED lighting system for replacement of existing metal halide lamp driven by magnetic ballast is provided. The retrofit lamp includes a circuit that converts the AC current supplied by magnetic ballast to DC current required for illuminating the LEDs.

Abstract: An energy dissipative element protects hard disk drives from shocks and vibrations. A closed elastic envelope houses a body of open cell foam, a volume of viscous liquid, and a compressible gas. Under compression or expansion of the foam, viscous liquid flows through cell orifices and thereby dissipates energy resulting from external force applied against the elastic wall. The energy dissipative elements are applied between a disk drive housing and an outer case to create a ruggedized portable disk drive module.

Abstract: An energy dissipative element protects hard disk drives from shocks and vibrations. A closed elastic envelope houses a body of open cell foam, a volume of viscous liquid, and a compressible gas. Under compression or expansion of the foam, viscous liquid flows through cell orifices and thereby dissipates energy resulting from external force applied against the elastic wall. The energy dissipative elements are applied between a disk drive housing and an outer case to create a ruggedized portable disk drive module.