Abstract: An illumination device comprises one or several lasers emitting light of a first wavelength or wavelength range, a wavelength converting member converting at least part of the light of the first wavelength or wavelength range into light of a second wavelength or wavelength range, a scanning unit adapted to scan one or several laser beams of said one or several lasers across said wavelength converting member in order to generate an illumination pattern formed at least of the light of the second wavelength or wavelength range, and, optionally, an imaging optics imaging said illumination pattern to the far field. A first light guiding structure is arranged on a light emitting side of said wavelength converting member, said first light guiding structure forming a grid of first light guiding channels. The illumination device can be used as an adaptive headlamp of a vehicle and achieves a high contrast between illuminated and dark regions as well as a high efficiency with a small projection optics.

Abstract: A LED controller for an LED pixel array includes a serial interface to an external data bus, along with an address generator connected to the serial interface and the LED pixel array. An image frame buffer is connected to the interface to receive image data and further connected to the address generator to receive an image frame buffer address. A command and control module is connected to the serial interface and configured to modify image frame buffer output signals. A calibration data storage module is connected to the command and control module to store calibration data related to pixel voltage response in the LED pixel array.

Abstract: A method of fabricating closely spaced pcLEDs arranged in a matrix array of perpendicular rows and columns comprises an initial phosphor deposition step in which phosphor is deposited at alternating locations (pixels) in the matrix array in a checkerboard pattern, so that the locations in the array at which phosphor is deposited are not adjacent to each other. In a subsequent phosphor deposition step phosphor is deposited at the alternating locations at which phosphor was not deposited in the first deposition step. In between the two phosphor deposition steps, reflective or scattering structures may be fabricated on sidewalls of the phosphor pixels to optically isolate pcLEDs in the resulting array from each other.

Abstract: A light source includes a light-emitting diode or device (LED) and an optic mounted over the LED. The LED emits a first radiation pattern that is non-rotationally symmetric about a first axis. The optic collects the first radiation pattern and projects a second radiation pattern that is rotational symmetric about a second axis and has a peak intensity that is angled from the second axis.

Abstract: A method to produce a light-emitting device package includes mounting junctions on pads of a metalized substrate, where the junctions are at least partially electrically insulated from each other, and forming wavelength converters, where each wavelength converter is located over a different junction and separated by a gap from neighboring wavelength converters.

Abstract: A lighting arrangement and a method of coupling light into a light guide are described. A light source is embedded within a light guide. The light guide includes first and second outer surfaces arranged on opposite sides. A forward direction extends from the light source parallel to the first outer surface. A collimator is embedded within the light guide. The collimator comprises a first reflector surface facing towards the second outer surface and a second reflector surface facing towards the first outer surface. The light source is arranged to emit light between the first and second reflector surfaces. The first reflector surface is arranged at least substantially parallel to the forward direction. At least a portion of the second reflector surface is arranged under an angle to the forward direction.

Abstract: Techniques, devices, and systems are disclosed and include LEDs with a first flat region, at a first height, including a plurality of epitaxial layers such as a first n-layer, a first p-layer, and a first active layer. A second flat region at a second height and parallel to the first flat region includes at least a second n-layer. Sloped sidewalls connect the first flat region and the second flat region and include at least a third n-layer. The p-layer of the first flat region is thicker that at least a portion of the third region. A p-contact is formed on the first p-layer and an n-contact is formed on the second n-layer.

Abstract: A tunable illumination system is disclosed which splits a single channel output into three by means of current steering and/or time division and multiplexing techniques. More particularly, the tunable light system may split the input current into three pulse-width modulated (PWM) channels. The individual duty cycles of the PWM channels may be adjusted based on a control signal that is received via a control signal interface. The control signal interface may include a switch and/or other circuity that is manipulated by the user when the user wants to change the color of light that is output by the illumination system.

Abstract: The invention describes an LED lighting assembly comprising a reflector unit comprising a number of reflector regions; an LED carrier realized to support at least one LED arrangement; and at least one positioning feature for positioning the LED carrier relative to the reflector unit, wherein a positioning feature is arranged in the same plane as the optical center of the LED arrangement. The invention further describes a method of manufacturing such an LED lighting assembly.

Abstract: A device comprising a flexible printed circuit strip is disclosed. The flexible printed circuit strip comprises a plurality of first sections connected to a plurality of second sections. The plurality of first sections are bendable in at least a first axis relative to the plurality of second sections. The plurality of first sections comprise a connector to house at least one light emitting element. The plurality of second sections comprises a protrusion with an opening between two adjacent second sections such that the protrusion is bendable in at least two axes. The plurality of second sections comprise a connector to connect an electrical power supply.

Abstract: A biometric identification system and a method for biometric authentication are described. A biometric authentication system includes at least one light source comprising at least one of a vertical surface emitting laser (VCSEL) or a VCSEL array configured to provide an illumination beam when the biometric authentication system is turned on. The system also includes an optical element configured to broaden the illumination beam and direct the illumination beam towards the portion of the object so as to generate at least one corresponding image response. The system also includes an image sensing unit configured to receive the at least one corresponding image response, capture a speckle pattern in the image response and form at least one of a computer readable image or data representing a speckle contrast in the speckle pattern.

Abstract: An LED circuit board, system, and method of using an LED configuration tool are described. The LED circuit board contains a microprocessor that wakes up when power is supplied from the tool. The microprocessor determines that the tool is present by sending a signal from one pin and detecting whether the same signal is received at another pin. When analog or digital programming information received from the tool indexes the information in a table of the microprocessor or also uses a new table provided by digital programming information, the programming information is used to change a lighting configuration of the LEDs. Feedback from the microprocessor to the tool provides information regarding the status of programming the microprocessor.

Abstract: A light emitting device includes a vertical via through the P-type semiconductor layer and the active layer. Using a vertical via reduces quantum well damage, allows shortening of P-N spacing, and allows increased reflective area. A dielectric structure is formed in the via to provide a sloped wall that extends to an upper surface of the device. Another dielectric layer covers the upper surface and the sloped wall, and provides select contacts to the semiconductor layers. A metal layer is subsequently applied. Because the dielectric layers provide a continuous slope from the surface of the device, the metal layer does not include a vertical drop. Because the active layer does not extend into the via, the contact to the N-type semiconductor layer may be situated closer to the wall of the via, increasing the area available for a reflective layer.

Abstract: A light emitting device comprises a reflector cup coupled to a base that defines a cavity. The base comprises a plurality of metal pads exposed on a bottom surface of the cavity. The base further comprises a plurality of protrusions arranged around a perimeter of the base and disposed inside one or more side surfaces of the reflector cup. The light emitting device comprises an LED die disposed over the bottom surface of the cavity. The LED die is coupled to the metal pads with gold-tin solder. The LED die has a footprint that is at most 30% smaller than an area of a top opening of the cavity.

Abstract: Various embodiments include apparatuses and methods control apparatus to color tune a light-emitting diode (LED) array. In one specific example, a control apparatus to color tune a light-emitting diode (LED) array for perceptually uniform color-tuning is disclosed. The apparatus includes a correlated color temperature (CCT)-control device that is adjustable by an end-user to a desired color temperature of the LED array and producing an output signal corresponding to the desired color temperature. A storage device is electrically coupled to the CCT-control device to correlate a mechanical movement range of the CCT-control device to provide substantially uniform increases in perceptual CCT values from the LED array based on a set of N predetermined values. Other apparatuses and methods are described.

Abstract: An infrared illumination and detection system can include an infrared light source that can emit infrared light having a first wavelength. A visible light source positioned adjacent the infrared light source can emit visible light that overlaps the emitted infrared light. An infrared detector assembly, positioned adjacent the infrared light source and the visible light source, can include a wavelength-sensitive filter that can block wavelengths away from the first wavelength. The infrared detector assembly can include a sensor that can sense light at the first wavelength. The emitted infrared light can appear red when viewed by the human eye in the absence of the emitted visible light. The emitted visible light can optionally be sufficiently bright so as to substantially eliminate viewed redness when the infrared light and the visible light are viewed, together, by the human eye. Alternatives to reduce or eliminate the perceived redness are also provided.

Abstract: The pcLED pixels in a phosphor-converted LED array each comprise an optical element on the light-emitting surface above the phosphor layer. In methods for making such pixelated LED arrays, a thin layer of a sacrificial phosphor carrier substrate is retained as the optical element on the output surface of the phosphor pixels upon completion of the fabrication process.

Abstract: Interlocking light emitting diode (“LED”) light guide tiles are disclosed. The tiles have interlocking edge features that provide physical interlock fitting between tiles and present a continuous appearance, both in an “on,” where LEDs are powered on and emitting light state and an “off” state, where LEDs are powered off and not emitting light. The LED light guide tiles interface with LEDs (housed in or embodied as integrated circuit LED packages) to output light through the surfaces of the light guide. The interlocking edge features of the light guide tiles are shaped to obscure or block an image of the LED packages from being seen by observers looking at the light guide tiles. Light guide tile assemblies or installations can be easily formed out of interchangeable tiles with little or no requirement for relative directional alignment of the tiles.

Abstract: Pixelated array light emitters are formed with closely-spaced pixels having ultra-smooth sidewalls. In methods for making such pixelated array light emitters, a converter layer of phosphor particles dispersed in a binder is disposed on a carrier, and then singulated by saw cuts or similar methods to form an array of phosphor pixels. The binder is fully cured prior to singulation of the converter layer. Further, the carrier is rigid rather than flexible. As a consequence of fully curing the binder and of using a rigid carrier to support the converter layer, singulation results in phosphor pixels having smooth side walls. The array of phosphor pixels is subsequently attached to a corresponding array of LEDs with an adhesive layer, separate from the binder used to form the converter layer. The pixel sidewalls may be formed with controlled morphology, for example at acute or obtuse angles with respect to the carrier.

Abstract: A light emitting device is disclosed and includes an emission source configured to emit a primary blue light and a wavelength-converting element configured to convert the primary blue light to a secondary light having a correlated color temperature (CCT) in the range of 1600K-2500K and color rendering index (CRI) in the range of 40-60, the wavelength-converting element including a red phosphor material having a peak emission wavelength that is less than 620 nm and a green phosphor material having a peak emission wavelength that is greater than 530 nm. The device may exhibit a melanopic/photopic ratio of less than 0.25 and/or may exhibit a radiometric power fraction of light having a wavelength below 530 nm below.