Abstract: In embodiments of the present invention, a method and system is provided for designing improved intelligent, LED-based lighting systems. The LED based lighting systems may include fixtures with one or more of rotatable LED light bars, integrated sensors, onboard intelligence to receive signals from the LED light bars and control the LED light bars, and a mesh network connectivity to other fixtures.

Abstract: In embodiments of the present invention, a method and system is provided for designing improved intelligent, LED-based lighting systems. The LED based lighting systems may include fixtures with one or more of rotatable LED light bars, integrated sensors, onboard intelligence to receive signals from the LED light bars and control the LED light bars, and a mesh network connectivity to other fixtures.

Abstract: A lighting device is generally illustrated having a light body having forward facing light sources including a visible white light source, visible colored light source and an infrared light source. Additionally, a side facing light source is provided. The light body also includes switches for activating the visible light sources and a three-position switch for activating the IR light source and the side facing light source. At least one switch is provided for turning at least one of the light sources on and off and further adjusting light intensity of the light source. The light source of the lighting device may further be controlled based on a detected chemistry composition of the power source.

Abstract: Some embodiments regard a method comprising: using an input voltage to generate an output voltage having a first voltage level; in a first period, when the output voltage changes from the first voltage level to a second voltage level, storing electrical charges resulted from the output voltage changing from the first voltage level to the second voltage level; and in a second period subsequent to the first period when the output voltage demands energy, using a voltage generated from the stored electrical charges in place of the input voltage to generate the output voltage.

Abstract: A THz reverse micromagnetron includes a MEMS-based reverse magnetron configuration in which the anode is located at the center of the magnetron surrounded by a cathode ring. Electrons move radially inward in the combined electric and magnetic cross-fields and can reach orbiting angular frequencies in the THz region, even with a magnetic field of the order of 1 T or less. The THz reverse micromagnetron is portable, operates at room temperature, and can be bright.

Abstract: Disclosed is a single switch integrated electronic ballast circuit for a fluorescent lamp, comprising an input for receiving a rectified DC voltage; a power factor correction portion for shaping the input line current to substantially a sinusoidal waveform and in phase with the rectified voltage, wherein the power factor correction portion includes capacitors; an energy storage portion for storing energy during dimming operations of the fluorescent lamp, wherein the capacitors also form part of the energy storage portion; an inverter with a resonant tank forming a resonant circuit for converting the DC voltage to an AC voltage to be delivered to the lamp; and a single switch for: 1) shaping the input line current to a substantially sinusoidal waveform as part of the power factor correction portion; and 2) providing a square voltage waveform across the input of the resonant circuit resulting in a substantially symmetrical waveform across the output of the resonant circuit.

Abstract: In one aspect, protecting high frequency (HF) amplifiers of a plasma supply device configured to deliver >500 W at a substantially constant fundamental frequency >3 MHz is accomplished by: driving two HF amplifiers with two drive signals having a common frequency and a predetermined phase shift with respect to one another; generating two HF source signals using the HF amplifiers, the HF source signals coupled in a coupler to form a HF output signal; transmitting the HF output signal to the plasma load; measuring electrical variables related to the load impedances seen by the two HF amplifiers; determining whether the load impedance seen by one of the HF amplifiers lies outside a predetermined range; and adjusting the phase shift of the two drive signals, wherein neither of the load impedances seen by the HF amplifiers lies outside the predetermined range.

Abstract: It is provided an LED lighting device calibratable to 0 to 100% of wide range about a chromaticity and luminance of a illumination light by a simple configuration, and a driving method for the LED lighting device. The LED lighting device is provided with a first light-emitting unit and a second light-emitting unit differing a color temperature mutually, and a control circuit for executing a cyclic light/quench control of the first light-emitting unit and the second light-emitting unit, and for executing a light control of the first light-emitting unit and the second light-emitting unit by a PNM (Pulse Number Modulation) control in a fixed cycle so as to have a lighting period Ton for lighting/quenching the first light-emitting unit and the second light-emitting unit complementarily, and a quenching period Toff for quenching both the first light-emitting unit and the second light-emitting unit.

Abstract: A liquid crystal display includes a main body, a screen positioned on the main body, a backlight module positioned in the main body and supplying light for the screen, a controller for controlling the brightness of the backlight module and an ambient light sensor positioned on the main body. The ambient light sensor includes a barrel, an optical sheet positioned at an end of the barrel and a photosensitive unit positioned at the other end of the barrel. The photosensitive unit creates a signal according to the ambient light received via the optical sheet, and sends the signal to the controller. The controller adjusts the brightness of the backlight module. The optical sheet includes a first surface, a second surface opposite the first surface and a plurality of V-shaped micro structures formed on the first surface.

Abstract: The invention relates to a control (7) of the lighting of an elevator car (3) as well as to a method for controlling the lighting of an elevator car. The lighting of an elevator car according to the invention is controlled at least partly on the basis of information about a change in the speed of the elevator car.

Abstract: An electronic ballast includes a ballast control circuit controlling an inverter circuit to supply a rectangular wave AC power to a high-pressure discharge lamp. The ballast control circuit includes a load voltage detection circuit adapted to detect load voltages of both positive and negative polarities applied to the lamp, a comparison and selection circuit adapted to compare the detected load voltages of the positive and negative polarities and select one of the positive and negative polarities, and a switching control circuit adapted to use the load voltage of the polarity selected by the comparison and selection circuit for controlling load current in one cycle after a period of detecting the load voltages of both the positive and negative polarities.

Abstract: A driving circuit includes a first inductor coupled in series with a light source for providing power to the light source. A controller coupled to the first inductor can control a switch coupled to the first inductor, thereby controlling a current flowing through the first inductor. A current sensor coupled to the first inductor can provide a first signal indicative of the current flowing through the first inductor, regardless of whether the switch is on or off. The switch is controlled according to the first signal. A second inductor magnetically coupled to the first inductor is also electrically coupled to the first inductor via a common node between the switch and the first inductor for providing a reference ground for the controller. The reference ground is different from the ground of the driving circuit.

Abstract: An inverter driver controls an inverter that supplies driving voltages to a plurality of discharge lamps. The inverter driver includes a first amplifier having an output terminal, a second amplifier having an output terminal connected to the output terminal of the first amplifier, and a capacitor connected between the output terminal and a ground source. The first amplifier outputs only a negative current corresponding to the maximum value among the driving voltages supplied to the plurality of discharge lamps, and the second amplifier outputs a current corresponding to the maximum value among the driving currents flowing through the plurality of discharge lamps. Such inverter driver controls the inverter according to a voltage of the capacitor.

Abstract: A utility light is provided. The utility light comprises a first array of light sources having a first color facing in a first direction, a second array of light sources having a second color facing in a second direction that substantially opposes the first direction, a motion sensor, and an electronic controller to determine a first state based on an input received from the motion sensor, to operate the first array of light sources in the first state, to determine a second state based on the input received from the motion sensor, and to operate the second array of light sources in the second state.

Abstract: A backlight assembly includes a main circuit board having a light-generating part, a control circuit board which provides a control signal for controlling the light-generating part, and a sub-circuit board which is electrically connected to the control circuit board and receives the control signal, the sub-circuit board including a buffer which generates an amplified control signal in response to the control signal, and where the sub-circuit board is electrically connected to the main circuit board and provides the amplified control signal. The control circuit board and the main circuit board are electrically connected by the sub-circuit board, and the sub-circuit board amplifies the control signal received from the control circuit board and provides the control signal to the main circuit board.

Abstract: A light-emitting diode (LED) bulb has an LED within a shell. The LED bulb also includes a driver circuit for providing current to the LED. The drive circuit has a thermal protection circuit, which includes a thermistor having a positive thermal coefficient and a switching temperature. The driver circuit also includes a switch-mode power supply (SMPS) controller with an input pin and an output pin. The thermistor is connected to the input pin. When the thermistor temperature is above the switching temperature, the thermal protection circuit causes the SMPS controller to produce a signal with a second duty cycle on the output pin. When the thermistor temperature is below the switching temperature, the thermal protection circuit causes the SMPS controller to produce a signal with a first duty cycle on the output pin. The second duty cycle is higher than the first duty cycle.

Abstract: A circuit arrangement for operating an LED and an fluorescent lamp may include a main rectifier; an auxiliary rectifier; an inverter, the output of said inverter having a terminal for connecting the fluorescent lamp; a starting device, wherein its first terminal is coupled to a control electrode of one of the switches of the inverter; a pull-down circuit; and a starting capacitor; wherein the second terminal of the starting device and the second terminal of the pull-down circuit are coupled to the first output terminal of the auxiliary rectifier; wherein the starting capacitor is coupled between the first and the second output terminal of the auxiliary rectifier; and wherein there is arranged in parallel with the starting capacitor a series circuit including a first and a second terminal for the LED and an LED switch, wherein the LED switch has a control electrode, an operating electrode and a reference electrode.

Abstract: An active type multiple channeled LED power driving system which includes seven regions, wherein power is lead-in through the first region with the EMC circuitry and the PWM circuitry, passing through the second region with the transformer, entering the third region with the CC & CV control circuitry, passing through the fourth region with two multiple channeled outputers, lead-in the fifth region having two intermittent modulating circuitries, outputting to the sixth region with the two LED lighting modules, and setting with environment parameters sensors in the seventh region, thereby raising the electronic typed heat dissipation rate and energy efficiency under the system operation to let the LED lamp be able to achieve its maximum performance.

Abstract: A light system and method includes a housing having an array of LEDs spaced to transmit light within a field of illumination. An EM sensor disposed within the housing is configured to detect EM radiation within the field of illumination. A processor is configured to generate an output in response to levels of EM radiation, such as visible light, infrared light, and/or radio frequency (RF) radiation detected by the EM sensor relative to a predetermined setpoint.

Abstract: In embodiments of the present invention, a method and system is provided for designing improved intelligent, LED-based lighting systems. The LED based lighting systems may include fixtures with one or more of rotatable LED light bars, integrated sensors, onboard intelligence to receive signals from the LED light bars and control the LED light bars, and a mesh network connectivity to other fixtures.