Abstract: A substrate for a solid state lighting module has a plurality of serrated finger sections extending from an interconnecting base. The substrate may be formed from a single rectangular sheet by cutting away material between adjacent finger sections of a symmetrical second substrate to form the finger sections of the substrate. Parallel linear rows of solid state light sources may be disposed along the length of each finger section. For example, the solid state light sources may be disposed proximate to points of sawteeth at the edges of the finger sections.

Abstract: A packaged light emitting device 100 that allows enhanced light cutoff in lighting applications to better control glare and optimize lumen output. Packaged device 100 includes an LED array 4 in cavity 32 whose inner wall includes both a reflective wall portion 34 and a non-reflective wall portion 36 to increase output of useful light while mitigating reflection of light that can cause glare. An array 4, preferably linear, of light-emitting diodes 3 is formed on printed circuit board (PCB) 1, and surrounded by wall 30 which bounds cavity 32. A first circuit board portion 20 of PCB upper surface 2 enclosed within wall 30 disposed forward of LED array 4 and adjoining non-reflective wall portion 36 is non-reflective, such as being black. A second circuit board portion 22 is reflective, such as being silvered. Packaged device 100 is suited for automotive headlights and fog lights.

Abstract: A DC-DC flyback converter includes a transformer and a switching component connected between the transformer and a ground. The switching component controls current flow through the primary winding of the transformer. A snubber circuit is connected between ground and the connection between the transformer and the switching component. The snubber circuit reduces transient voltage spikes across the switching component. A capacitive component of the snubber circuit provides stability for a primary side auxiliary output voltage while maintaining power factor and THD performance.

Abstract: A packaged light emitting device 100 that allows enhanced light cutoff in lighting applications to better control glare and optimize lumen output. Packaged device 100 includes both a reflective dam region 34 and a non-reflective dam region 36 to increase output of useful light while mitigating reflection of light that can cause glare. An array 4, preferably linear, of light-emitting diodes 3 is formed on printed circuit board (PCB) 1, and surrounded by dam 30 which bounds encapsulant 40. A first circuit board portion 20 of PCB upper surface 2 enclosed within dam 30 disposed forward of LED array 4 and adjoining non-reflective dam portion 36 is non-reflective, such as being black. A second circuit board portion 22 is reflective, such as being white. Packaged device 100 is suited for automotive headlights and fog lights.

Abstract: An example lamp optic comprises a light guide (100) to receive light from a light source (108) and generate a light beam via internal reflection. The light guide includes a proximal end (104) to receive the light and a distal end (106) to emit the light beam. An optical axis (OA) extends from the proximal end to the distal end, and a transverse axis (TA) extends perpendicular to the optical axis. A surface of the distal end has a stepped portion (110) including a central surface (112) substantially parallel to the transverse axis and centered on the optical axis, and linear steps (114) extending in opposing directions from the central surface parallel to the transverse axis and along the optical access towards the distal end. Each linear step includes an optical face (116) extending perpendicular to the optical axis and a transverse face (118) extending perpendicular to the transverse axis.

Abstract: PWM-based dimming techniques are provided for lighting systems. The techniques can be used to eliminate or otherwise reduce the potential for strobing and flickering, and may be implemented, for example, in a driver suitable for powering LED lighting systems, but can be used with other suitable light sources as well. In an example embodiment, the potential for line frequency induced flicker, or even line disturbances that are periodic with the line frequency, can be eliminated or reduced by synchronizing the PWM frequency to the line frequency or so-called mains frequency, and the potential for strobing can be eliminated or reduced by either using a randomized phase angle on a cycle-to-cycle basis or by using multiple PWM LED drive circuits all having constant cycle-to-cycle phase angle but a different phase angle from drive circuit to drive circuit (or different from LED string to LED string, as the case may be).

Abstract: Techniques are disclosed for integrating the LED lead frame into the LED circuit fabrication process. The LED packages within the lead frame may be spaced according to the final spacing of the LED packages on the finished circuit board, such that multiple LED packages may be attached to a circuit board at a time by applying the lead frame to circuit board and then removing portions of the lead frame, leaving the LED packages attached to the board. The LED packages may be attached using solder or conductive epoxy, in some embodiments. Alternatively, part of the lead frame may include conductive wires forming one or more strings of LED packages. An entire string of LED packages may then be removed from the lead frame in a single motion and placement may be performed for a string of LED packages all at once rather than for individual LED packages.

Abstract: A method of providing accent ornamental illumination to a lamp of a motor vehicle comprising providing an accent lamp comprising a housing and a light-emitting device disposed within the housing; mounting the housing to an exterior surface of the lens cover of the vehicle lamp; and arranging the light-emitting device such that, when the housing is mounted to the exterior surface of the lens cover of the lamp, light emitted from the light-emitting device passes through the lens cover from outside the lens cover towards a lamp reflector of the vehicle lamp and illuminates the reflector. A motor vehicle lamp combination comprising, in combination, a motor vehicle lamp and an accent lamp also provided wherein, when the accent lamp is mounted on a lens cover of the motor vehicle lamp, light emitted from the light-emitting device is directed towards the reflector.

Abstract: Techniques and user interfaces are disclosed for controlling lighting fixtures having spatial distribution control capabilities. In some cases, the control techniques may use a high-level controller to define target and spread inputs for a desired illumination pattern provided by a lighting fixture in a given area to be lit. In such cases, the target and spread inputs may be transmitted, or otherwise provided, to a control module, which may be included in the lighting fixture. The control module may be configured to translate the inputs into the appropriate movements and/or light source adjustments based on the specific lighting fixture being used to achieve the desired illumination pattern. In some cases, multiple lighting fixtures may be controlled by one or more control modules. In such cases, the high-level controller may be configured to provide inputs to the control module(s) to cause one or more illumination patterns using the lighting fixtures.

Abstract: A headlamp duct 28 is connected with engine ducting 2 between air inlet 40 and ducting outlet 42 which is coupled to the engine. Headlamp duct 28 receives airflow 13 from engine ducting 2 and directs airflow to vehicle headlamp 30. A valve 6 disposed between headlamp duct 28 and engine ducting 2 is displaceable between a first position and a second position, whereby in the first position valve 6 permits airflow to headlamp duct 28 to be discharged toward vehicle headlamp 30, and in the second position valve 6 occludes airflow more to headlamp duct 28. Valve 6 is preferably responsive to air pressure in engine ducting 2. At low engine throttle, valve 6 permits airflow to headlamp duct 28 and at high engine throttle valve 6 is displaced to the second position, increasing air flow to the engine.

Abstract: Techniques for supplying auxiliary power to AC powered lighting devices are disclosed. An auxiliary power supply can be used, for example, to provide auxiliary power to lighting control circuitry, an LED driver, or any other electronic lighting device. In some example embodiments, the linear regulator is connected to a switch that is controlled by a control circuit such that the linear regulator operates only when the instantaneous line input voltage is in a certain range where the linear regulator has a somewhat good efficiency. In such cases, when the linear regulator is operating, energy is stored with an auxiliary capacitor connected to the output of the linear regulator. In some embodiments, the linear regulator is configured to operate only when the line voltage is between a determined upper and lower voltage threshold; while in other cases the linear regulator is configured to operate only when the line voltage is increasing through the predetermined voltage threshold values.

Abstract: Methods and systems are described for sampling an LCOM message signal at a rate less than the Nyquist rate (i.e., an “alias frequency”) and accurately reconstructing the entire LCOM message using a light receiver (e.g., digital camera) of a typical mobile computing device, such as a smartphone, tablet, or other mobile computing device. The described methods and system take advantage of the repetition of LCOM signals, sampling an LCOM signal at a frequency less than the Nyquist frequency over at least two repetitions of a signal waveform, thereby collecting sufficient samples to accurately reconstruct the signal. The samples of each successive signal waveform repetition are offset from one another so that different points on the waveform are sampled, thus facilitating reconstruction of the signal.

Abstract: A light guide 2 for a ceiling downlight module 1 provides a batwing light distribution in a compact, flat form factor using edge-lit source light injection. A plurality of solid state light sources 16 inject light from peripheral side surface 12 inward into light guide 2 which has a disc-shaped light guide body 4 having a set of concentric annular steps or faces 42, 44, 46, 48, 50, 52 between which inwardly-facing light-exit rings or facets 24, 26, 28, 30, 32, 34 are formed. Light exiting the ring-shaped facets 24-34 provides substantial light intensity in lateral directions away from a normal optical axis A of light guide 2. Light exiting from facets 24-34 created an advantageous and aesthetically pleasing appearance of lighted rings.

Abstract: A silicone-grafted core-shell particle is described wherein the silicone-grafted core-shell particle comprises a core of an inorganic particle and a shell of a grafted poly(dimethylsiloxane) polymer formed from a bi-terminated poly(dimethylsiloxane) having reactive groups at each terminal end. The silicone-grafted core-shell particles may be dispersed in a polysiloxane polymer matrix and employed as an LED encapsulant.

Abstract: There is herein described an LED lamp suitable for replacing conventional fluorescent lamps. The LED lamp has a tubular body and a flexible circuit board as compared to the rigid circuit boards used in other similar lamps. The flexible circuit board has a plurality of LEDs, electric circuitry for powering the LEDs, and a curvature that is maintained by a retention means. The curvature of the flexible circuit board substantially corresponds to the curvature of the tubular body which places the LEDs further away from the front surface of the lamp thereby allowing for improved diffusion and light distribution.

Abstract: There is herein described a ceramic phosphor target which may be used in a laser-activated remote phosphor application. The target comprises a substantially flat ceramic phosphor converter comprised of a photoluminescent polycrystalline ceramic which is attached to a reflective metal substrate by a high thermal conductivity adhesive.

Abstract: There is herein described a composite ceramic wavelength converter having a first phase of an ?-SiAlON:Eu phosphor and a second phase of a ?-SiAlON:Eu phosphor. The converter may be used in a phosphor-converted light emitting diode to form a light source having a correlated color temperature (CCT) from 2000K to 4500K.

Abstract: Circuits to provide phase-cut analog dimming of solid state light sources are presented. Each circuit comprises an anchoring circuit to communicate with a dimming controller circuit, the anchoring circuit having a proportional direct current (DC) voltage input, a biasing voltage input, a connection to a ground reference, and an output in communication with a dimming controller circuit. The anchoring circuit provides a reference voltage to permit phase cut dimming to be operable at a plurality of line voltages.

Abstract: Systems and methods for a multichannel power supply are disclosed. The multichannel power supply includes a front end circuit configured to receive an input voltage and to provide a regulated front end direct current (DC) voltage. A multichannel source circuit is coupled to the front-end circuit. The multichannel source circuit includes a controller, a reference voltage circuit, and a plurality of source circuits. Each source circuit in the plurality of source circuits represents a distinct output channel of the multichannel power supply. The multichannel source circuit is configured to generate a constant current output for each source circuit in the plurality of source circuits. Each load in a plurality of loads is connected to a corresponding source circuit in the plurality of source circuits and is configured to receive the corresponding constant current output via the corresponding source circuit.