Solid-state lamps having an electronically adjustable light beam distribution are disclosed. In accordance with some embodiments, a lamp configured as described herein includes a plurality of solid-state emitters (addressable individually and/or in groupings) mounted over a non-planar interior surface of the lamp. The interior mounting surface can be concave or convex, as desired, and may be of hemispherical or hyper-hemispherical geometry, among others, in accordance with some example embodiments. In some embodiments, the heat sink of the lamp may be configured to provide the interior mounting surface, whereas in some other embodiments, a separate mounting interface, such as a parabolic aluminized reflector (PAR), a bulged reflector (BR), or a multi-faceted reflector (MR), may be included to such end. Also, the lamp may include one or more focusing optics for modifying its output. In some cases, a lamp provided as described herein may be configured for retrofitting existing lighting structures.

Various embodiments are described herein that relate to systems and methods for selectively providing current to power LEDs. The techniques introduced here can enable smooth dimming of the LEDs from maximum brightness down to actual extinction or pseudo-extinction. More specifically, the LEDs can be dimmed to extinction without any significant gaps in the levels of brightness (i.e., a noticeable drop rather than a smooth transition between brightness levels). Various pulse width modulation (PWM) and shunting techniques may be used to control the power provided to each color channel of an LED board. Conventionally, PWM often causes LEDs to produce an undesirable acoustic effect. However, by dithering the PWM signals between multiple predetermined positions once the frequency enters the audible range (e.g., below 25 kHz), the cumulative acoustic effect instead becomes white noise.

Disclosed is a light emitting device having a configuration that, when a magnitude of an input voltage is greater than a minimum light emitting voltage, all light emitting devices are turned on regardless of the magnitude of the voltage. As the magnitude of the voltage is smaller, the light emitting devices are connected in parallel. As the magnitude of the voltage is greater, the light emitting devices are serially connected.

Disclosed herein is a lighting apparatus capable of uniformly maintaining power consumed by light emitting units even in the case in which various voltages are applied, and increasing power efficiency while minimizing a heating problem by adjusting a reference voltage applied to a connection structure of the light emitting units and a distribution switch according to magnitude of the applied voltage.

Disclosed are an LED (Light Emitting Diode) display module and a method of fabricating the LED display module. Lamp beads in the LED display module are fixed to the surface of a linearly arranged lamp bead plate, the lamp bead plate is fixed to a driving PCB (Printed Circuit Board), the surface of the lamp bead plate is perpendicular to the surface of the driving PCB, the surface of the driving PCB is perpendicular to the surface of a glass plate, and a fixed member is fixed on a frame. The transparent glass plate with high transparency is employed as a mounting body and the driving PCB is transversely disposed on the glass plate, so that shielding of light by the driving PCB can be remarkably reduced and the transparency of the LED display module is improved.

Lighting apparatus includes a first string of light-emitting diodes (LEDs) having a first terminal coupled to a current source and configured to produce a first correlated color temperature (CCT) and a second string of LEDs having a first terminal coupled to the current source and configured to produce a second CCT different from the first CCT. The lighting apparatus further includes a current control circuit coupled to second terminals of the first and second strings of LEDs and configured to vary a proportionality relationship between current levels in the first and second strings of LEDs responsive to variation in a current provided by the current source to the first terminals of the first and second strings of LEDs. The current control circuit may include a current mirror circuit and a control circuit configured to selectively enable and disable the current mirror circuit.

This disclosure relates to systems and methods for controlling electrical loads in one or more areas. The system includes a room controller having a microprocessor for accessing data and providing commands, memory for storing information operably connected to the microprocessor, a relay for powering a load based on commands from the microprocessor, and a port for connecting a peripheral device. The system also includes a peripheral device connected to the port and configured to send data to the controller indicating the type of peripheral device; and a load connected to the relay.

The embodiments disclosed herein describe a set of fault detection circuits for LED circuits in an LED channel. A first fault detection circuit is configured to detect a short fault across one or more LEDs. A second fault detection circuit is configured to detect an open fault across an LED. A third fault detection circuit is configured to detect a short across an LED channel transistor. A fourth fault detection circuit is configured to detect an LED channel sense resistor open fault. A fifth fault detection circuit is configured to detect if the LED channel is being intentionally unused. These fault detect circuits can be implemented in a fault detection integrated circuit coupled to the LED channel.

The present invention discloses a control system for color temperature regulation of LED lights, comprising an AC input and a rectifying circuit. The rectifying circuit is connected with an absorption circuit; the absorption circuit is connected with a current regulation control module; a detection circuit is disposed between the current regulation control module and the absorption circuit; the current regulation control module is connected with a cold color series LED light module and a warm color series LED light module in parallel; and the cold color series LED light module and the warm color series LED light module generate a voltage difference. According to the present invention, through the configuration where the cold color series LEDs and the warm color series LEDs generate different voltages at different currents, the cold color series LED light module and the warm color series LED light module generate different voltage drops at different currents by means of the arrangement of resistors, achieving the effects of changing color temperature and regulating light. The process of the color temperature change is natural and smooth, enhancing visual comfortableness for users. Meanwhile, the control system for color temperature regulation of LED lights has a simple structure and is low in cost.

Disclosed herein is a lighting system configured to obtain an indicator data of a RF signal generated at a number of times in an area. When each such time is a current time, the indicator data generated at the current time is compared with the indicator data generated at a preceding time to determine a rate of change, and the indicator data generated at the current time is compared with a baseline indicator data at an earlier time to generate a difference value. The lighting system is configured to determine an indicator data metric based on the rate of change and the difference value and compare the indicator data metric with one of a rising transition threshold or a falling transition threshold to detect one of an occupancy condition or a non-occupancy condition in the area.