Abstract: A partially coated lamp capsule (212) for a projection headlamp (12) has filament (224) in capsule envelope (220) having light-transmissive coating (60) extending from capsule upper region (225) towards filament distal end (227) to an axial location in a region defined between about 0.098 inch (2.5 mm) above filament distal end (227) and about 0.098 inch below filament distal end (227), the capsule envelope (220) being uncoated on an undistorted portion of capsule envelope (220) below filament proximal end (229). Lamp capsule (212) is useful in projection headlamp (12) having a reflector (28) whose central heel (37) forms the hot spot and casts light through projector lens (30) to generate low and/or high beam patterns. Present lamp capsules (212) give increased photometric intensity over conventional lamps in low beam at critical driver's lane (0.6D, 1.3R) and (0.86D, V) test points, and in high beam at the critical (H,V) test point.

Abstract: A method of setting luminance levels of a solid-state light sources of a luminaire with programmable light distribution is provided. The method includes obtaining a file describing a desired light beam distribution, converting the desired light beam distribution into luminance levels for the solid-state light sources, and applying the luminance levels to the solid-state light sources to cause the luminaire to output the desired light beam distribution.

Abstract: Automotive lamp (10), preferably a backup lamp, includes first lamp (12) and plural LEDs (26a-n). The lamp (12) comprises light-transmissive material, first and second opposed end surfaces (16, 18), a source side (20) and an emission side (22) each extending between end surfaces (16, 18), source side (20) facing LEDs (26a-n), and emission side (22) having an aspherical surface facing area to be illuminated (24). The elongated optical lens (14) has a length (L) extending, parallel a first horizontal X-axis, between the end surfaces (16, 18) that is greater than a thickness along second horizontal Z-axis and a height along vertical Y-axis (X-, Y-, and Z-axes being mutually orthogonal). Elongated optical lens (14) defines focus line segment (FS) extending parallel the X-axis, and preferably bends LED light below a horizontal XZ plane, i.e. back towards source side (20).

Abstract: Techniques are disclosed for detecting stationary presence using IR sensor data. A number of IR images may be captured based on IR sensor data and these IR images may be averaged over various time intervals to calculate a number of average IR frames. The difference between these average IR frames provides a delta frame. A mask frame may be calculated as the summation of delta frames over time, and the value of the mask frame may be used to detect a stationary human presence even when no delta value is calculated. Alternatively, the mask frame may be used to calculate a background frame that represents the IR signature of stationary or cyclical objects within the scanned area that are not intended to trigger the presence detection system. A stationary presence may be determined by subtracting the background frame from a current average IR frame.

Abstract: A rectifying circuit is provided, which includes a first channel circuit, a comparator circuit, and a second channel circuit. The first channel circuit rectifies a first input signal using a transistor that is coupled between an input of the first channel circuit and a node. The comparator circuit is coupled with the transistor and controls it based on a difference between a representative voltage of the first input signal and a representative voltage of the node. The second channel circuit rectifies a second input signal using a diode coupled between an input of the second channel circuit and the node. The transistor may be a first MOSFET and the comparator circuit may be coupled with the first MOSFET by way of a second MOSFET. The second MOSFET controls the first MOSFET and is itself controlled by the comparator circuit.

Abstract: Techniques are disclosed for detecting changes in occupancy as well as the number of occupants within an area. Detection of one or more occupants entering or leaving the area may be accomplished using a sensor having a quantity of pixels. The pixels may be configured to receive thermal energy emitted from one or more objects present in the area, including from one or more occupants. In response to receiving the emitted thermal energy, the sensor may be configured to create thermal images of the area. These thermal images may include a plurality of thermal intensity values associated with one or more pixels of the sensor. Two or more thermal images can be compared to identify a change in thermal intensity values. A change in the occupancy of the area may be determined by based on the identified change in thermal intensity values.

Abstract: Methods and system to determine the health of wireless mesh networks are provided. Each radio node of a wireless mesh network transmits Link Quantification Messages (LQMs) interPAN at maximum power to enable adjacent nodes to determine the Received Signal Strength Indication (RSSI) on the wireless link to that radio node. Each radio node also transmits LQMs at successively lower power levels. The adjacent nodes detect a power level at measurable packet error rate to determine a noise floor for the wireless link. An aggregator collects link quantification information from the radio nodes and forms an intercommunication matrix for the wireless network. The RSSI and power level at measurable packet error rate information is used to remove unreliable links from the intercommunication matrix. Nodes are ranked and the reliability and dependability of the nodes is calculated to show the network health.

Abstract: Techniques and architecture are disclosed for horticultural lighting systems and devices, such as a light module assembly. The assembly includes a housing with a first and second light module attached thereto. The first and second light modules include a mounting block to be received in the housing. The mounting block includes a plurality of light sources to generate light to stimulate growth of a plant. The first light module includes a first removable lens to focus light from the light sources to a first portion of the plant and in a first direction relative to the plant. The second light module includes an optical conduit attached thereto. The conduit is to focus light from the light sources to a second portion of the plant and in a second direction different from the first direction. The assembly transmits light to an upper portion and a lower portion of the plant.

Abstract: A solid-state automotive vehicle headlamp includes a solid-state light source (SSLS), a clamshell reflector, and a reflector optic. The clamshell reflector includes a reflective surface defining a clamshell cavity with an open end facing a field to be illuminated. The reflector optic is defined by a portion of a spherical surface in surrounding relation to the SSLC. The reflector optic defines a light-transmissive window permitting a direct line-of-sight transmission of light generated by the SSLC to the reflective surface of the clamshell reflector. The reflector optic further includes a reflective region at least partially surrounding the light-transmissive window and configured to reflect light generated by the SSLC and directed at the reflector optic back towards the SSLC. The reflector optic redirects some of the light emitted by the SSLC through the light-transmissive window towards the clamshell reflector to create a more controlled beam pattern and increase the overall light output.

Abstract: A digitally compensated hysteretic power supply with enhanced resolution is provided. Such a power supply includes a comparator that is used to compare a load current sense signal with an internal signal generated from a digital-to-analog converter (DAC). A compensation circuit at a DAC input operates to improve current accuracy beyond the given DAC resolution. The current sense signal is converted to its digital equivalent, which is fed to a proportional-integral (PI) compensation loop, which in turn generates a relatively precise high resolution DAC input value. The DAC uses the higher part of the DAC value. The lower part of the DAC value is treated as a duty cycle number, and the DAC output is toggled between two levels at this duty cycle. This toggling generates a current output signal having a value that is the average of the two toggled values.

Abstract: A building monitoring system includes a plurality of image capture devices deployed to obtain images of target building systems, the target building systems being associated with optical landmarks visible by the image capture devices. A plurality of audio beacons are configured to output audio landmarks. A plurality of audio capture devices are deployed to obtain sound clips of the target building systems, each sound clip of the target building systems including at least one of the audio landmarks from the audio beacons. A data analysis system is configured to receive the images of the target building systems and identify each target building system from at least one of the optical landmarks and the audio landmarks.

Abstract: A luminaire includes a microcontroller and program logic that calculates the operational age of a light engine that includes a plurality of light emitting diodes connected in series. The program logic uses changes in transition voltage to calculate the operational age of a light engine. Changes in forward voltage across the light engine are used to detect sudden catastrophic failure of individual light emitting diodes. In response to the sudden catastrophic failure of one of the light emitting diodes, the program logic adjusts the power provided to the light engine based on the calculated operational age of the light engine. For example, the operational age of the light engine may be compared with a warrantied lifespan, and the power may be adjusted to increase the likelihood of compliance with the warranty.

Abstract: A solid state driver to adapt current ripple characteristics therein, at least partially based on operating characteristics of a solid state lighting device operated by the driver, is provided. The driver senses operating voltage, operating current, or a combination of operating voltage and operating current of a solid state lighting device. The driver stores pre-determined current ripple percentage settings in a data structure, for example, in a controller circuit. The driver selects and implements one of the pre-determined current ripple percentage settings based on one or more of the sensed operating characteristics of the solid state lighting device, to improve efficiency, to reduce the operating frequency, and/or to lower the operating temperature of one or more components of the driver.

Abstract: A laser-activated remote phosphor (LARP) target with a first layer having a first index of refraction and a phosphor dispersed within the first layer. A second layer which has a second index of refraction different from the first index of refraction and adjoins the first layer at an interface. The first index of refraction is higher than the second index of refraction such that the interface is configured to at least partially reflect light emitted from the phosphor.

Abstract: A conductor pad and a flexible circuit including a conductor pad are provided. The conductor pad includes a first contact region, a second contact region, and a body portion configured to establish a conductive path between the first contact region and the second contact region. The body portion includes a perimeter edge having at least a first convex segment and a second convex with a first non-convex segment disposed between the first convex segment and the second convex segment. A method of constructing a flexible circuit to facilitate roll-to-roll manufacturing of the flexible circuit is also provided.

Abstract: Aspects of the present disclosure include arrays of motion sensors that may be used to monitor a space to determine occupancy characteristics of the space, such as whether or not the space is occupied and the number of people located within the space. The array of motion sensors may be operatively connected to one or more building system components, such as lighting and HVAC equipment and can be used for adjusting an operating condition of the building system component based on whether a space is occupied.

Abstract: A luminaire includes a microcontroller and program logic that calculates the operational age of a light engine that includes a plurality of light emitting diodes connected in series. The program logic uses changes in transition voltage to calculate the operational age of a light engine. Changes in forward voltage across the light engine are used to detect sudden catastrophic failure of individual light emitting diodes. In response to the sudden catastrophic failure of one of the light emitting diodes, the program logic adjusts the power provided to the light engine based on the calculated operational age of the light engine. For example, the operational age of the light engine may be compared with a warrantied lifespan, and the power may be adjusted to increase the likelihood of compliance with the warranty.

Abstract: A constant output current LED driver is disclosed. The driver is capable of operating with a wide range of input direct current (DC) voltage, and is configured with a full bridge inverter, an auxiliary circuit, and a voltage current converter. The full bridge inverter and auxiliary circuit collectively operate to provide a phase shift controller for the LED driver system. The LED driver operates under zero voltage switching (ZVS) for all switches in the LED driver circuit for all of the input voltage levels and for all of the output voltage levels. By maintaining ZVS in all conditions, the system can operate at very high frequency and be compact yet still achieve high power density. The resulting topology is applicable for a wide range of constant output current LED drivers. Switchable loads other than LEDs can also be driven.

Abstract: Aspects of the present disclosure include simplified user interfaces configured to display one or more symbols for image capture by an image capture device. A computing device with image processing software may be used to process the image to detect the symbol and determine a control function associated with the symbol for controlling one or more building system components. Other aspects include software applications for allowing a user to customize a set of symbols and associated control functions.

Abstract: Lamp module 32 contains solid-state light source 17 and has mounting flange 42 coupleable to headlamp reflector 12. Lamp module 32 has base 2 defining central post 4, post 4 defining internal first air passage 401. Base and post act are heat sinks. Fan 8 is disposed within base 2. Circuit board 14 having LED arrays 17 is mounted inside post 4 in fluid communication with first air passage 401. Base 2 defines second air flow passage 405 exterior of post 4, second air passage 405 being oriented to direct air past mounting flange 42. Base 2 further defines third air passage 410 rearward of mounting flange 42 and radially outward from second air passage 405. Mounting flange 42 may be keys coupleable to slots 15. A method of directing an air stream through slots 15 in reflector socket 121 is described.