Abstract: A light-emitting device is disclosed. The light emitting device includes an electron blocking layer, a hole blocking layer, wherein at least a portion of the hole blocking layer is arranged to have a compressive strain, and an active layer disposed between the hole blocking layer and the electron blocking layer. The active layer may include a first barrier layer arranged to have a tensile strain, a second barrier layer arranged to have a tensile strain, and a first well layer disposed between the first barrier layer and the second barrier layer. The active layer may also include a first unstrained barrier layer, a second unstrained barrier layer, and a second well layer disposed between the first unstrained barrier layer and the second unstrained barrier layer.

Abstract: A vehicle headlight has a laser-based light source comprising: a laser for emitting laser light, a light converting device with a light converter for converting the laser light to converted light with a peak emission wavelength greater than a peak emission wavelength of the laser light, and an optical arrangement for providing a transformed focused image of the laser on the light converter, thereby broadening the image in at least a first direction perpendicular to an optical axis of the laser-based light source, such broadening being independent from a second direction being perpendicular to the optical axis and to the first direction.

Abstract: The invention describes a light conversion device comprising: a light converter, wherein the light converter is adapted to convert primary light to converted light, wherein a peak emission wavelength of the converted light is in a longer wavelength range than a peak emission wavelength of the primary light, a reflective structure attached to at least a part of a front surface of the light converter, wherein the front surface defines a light emission surface of the light conversion device, wherein the reflective structure is arranged to reflect a defined part of the converted light, wherein the defined part of the converted light is characterized by a wavelength above a threshold wavelength, and wherein the light conversion device is arranged to emit at least a part of the defined part of the converted light via the light emission surface such that a color point of light emitted via the light emission surface is shifted to a longer wavelength range than obtained without emission of such part.

Abstract: Embodiments of the invention include a luminescent ceramic including (Ba1-xSrx)2-zSi5-yO4yN8-4y:Euz 258 phase wavelength converting material (0.5?x?0.9; 0?y?1; 0.001?z?0.02) and M3Si3O3N4 3334 phase material (M=Ba, Sr, Eu). The M3Si3O3N4 3334 phase material comprises no more than 5 weight % of the material.

Abstract: A light emitting diode (LED) device may include an n-type layer formed on a transparent substrate. A photoluminescent (PL) in the n-type layer quantum well (QW) and an electroluminescent (EL) QW may be formed on the n-type layer. The PL QW and the EL QW may be separated from one another by a portion of the n-type layer. A p-type layer may be formed on the EL QW. Trenches may be formed extending into the n-type layer, the trenches defining an emitting area. A passivation material may be formed on sidewalls of the trenches and n-type contacts may be formed therein. A p-type contact may be formed on an upper surface of the p-type layer. A dichroic mirror may be formed on at least a lower surface of the transparent substrate.

Abstract: Techniques and devices are provided for sensing image data from a scene and activating primary light sources based on information sensed from the scene. Subsets of a plurality of primary light sources may be activated to emit sensing spectrum of light onto a scene. Combined image data may be sensed from the scene while the subsets of the plurality of primary light sources are activated. Reflectance information for the scene may be determined based on the combined image data and combined sensing spectra. Spectrum optimization criteria for the primary light sources may be determined based on the reference information and a desired output parameter provided by a user or determined by a controller. The plurality of primary light sources may be activated to emit a lighting spectrum based on the spectrum optimization criteria.

Abstract: The invention describes a light emitting diode array module comprising at least two light emitting diodes and a lens, wherein the lens comprises one common lens segment, wherein the common lens segment comprises a multitude of sections at least partly encompassing an axis perpendicular to the lens, wherein the sections shape an uneven surface of the lens, wherein the light emitting diodes are arranged to illuminate at least two non-overlapping target areas in a reference plane, and wherein the sections are arranged such that at least one light emitting diode illuminates one respective target area of the target areas. The invention further describes a flash light comprising at least one light emitting diode array module.

Abstract: Method and apparatuses are described herein for providing laser safety in semiconductor laser modules. For example, a semiconductor laser module may comprise a semiconductor laser and an optical element. The optical element that is operatively coupled with the semiconductor laser may disperse the laser light emitted from the semiconductor laser. The optical element may be coated with a transparent conductive material that serves as an interlock on the semiconductor laser. The transparent conductive material may be placed in the shape of a trace on the optical element where the trace is electrically in series with the semiconductor laser. On a condition that the trace is damaged, the laser light emitted from the semiconductor laser may be interrupted.

Abstract: Embodiments of the invention include a luminescent structure including an InxZnyP core, wherein 0<y/x<10, and wherein the core comprises an alloy including both In and Zn, and a shell disposed on a surface of the core, wherein a difference between a lattice constant of the shell and a lattice constant of the core relative to the lattice constant of the shell is less than 1%.

Abstract: A method of manufacturing a lead frame, includes preparing a stamping arrangement to stamp a lead frame comprising a plurality of electrode contact regions, wherein complementary contact regions are separated by an initial gap width; and a number of connecting bars, wherein a connecting bar extends between regions of the lead frame; using the stamping arrangement to stamp the lead frame; and deforming at least one connecting bar of the stamped lead frame to reduce the gap width between complementary contact regions to a final gap width. Further described is a lead frame comprising a plurality of LED electrode contact regions, with a gap width of at most 250 ?m between complementary contact regions after the deformation step. The invention further describes an LED lighting device comprising such a lead frame and at least one LED die package mounted onto complementary electrode contact regions of the lead frame.

Abstract: The invention provides a lighting device comprising a lighting unit, wherein the lighting unit comprises a light source configured to generate light source light and a luminescent material configured to convert at least part of the light source light into luminescent material light, wherein the lighting device is configured to generate lighting device light comprising at least part of said luminescent material light, wherein the luminescent material is configured to provide said luminescent material light upon excitation by said light source light in an excitation band (EX) of said luminescent material, wherein the light source is configured to provide said light source light with a full width half maximum (FWHM) of equal to or less than 30 nm, and wherein said light source is configured to excite the luminescent material in an isosbestic point (IP) of said excitation band (EX).

Abstract: Embodiments of the invention include a semiconductor light emitting device capable of emitting first light having a first peak wavelength and a semiconductor wavelength converting element capable of absorbing the first light and emitting second light having a second peak wavelength. The semiconductor wavelength converting element is attached to a support and disposed in a path of light emitted by the semiconductor light emitting device. The semiconductor wavelength converting element is patterned to include at least two first regions of semiconductor wavelength converting material and at least one second region without semiconductor wavelength converting material disposed between the at least two first regions.

Abstract: Different wavelength conversion materials, or different concentrations of a wavelength conversion material are used to encapsulate the light emitting elements of different colors of a hybrid light emitting module. In an embodiment of this invention, the light emitting elements of a particular color are encapsulated with a transparent encapsulant, while the light emitting elements of a different color are encapsulated with a wavelength conversion encapsulant. In another embodiment of this invention, a particular set of light emitting elements of different colors is encapsulated with a different encapsulant than another set of light emitting elements.

Abstract: A light-emitting diode (LED) strip is disclosed. The LED strip includes: an input terminal for receiving a first reference signal, a first LED coupled to an end of a power bus and driven by a first current signal, the first current signal being supplied to the first LED via the power bus; a current-copying circuit arranged to control a flow rate of the first current signal based on the first reference signal; and a first switching element arranged to re-couple the first LED to the power bus when the first LED is disconnected from the end of the power bus as a result of the LED strip being cut at a first location.

Abstract: An LED device holder, an LED lighting system and a method of manufacturing an LED lighting system are described herein. An LED lighting system includes a holder defining an aperture. The aperture has a perimeter and a fillet adjacent the perimeter. The fillet has a radius greater than or equal to 2.0 mm and less than or equal to 4.6 mm. An LED array is mechanically coupled to the holder. The LED array has a light emitting surface exposed through the aperture.

Abstract: A method includes capturing a first image of a scene, detecting a face in a section of the scene from the first image, and activating an infrared (IR) light source to selectively illuminate the section of the scene with IR light. The IR light source includes an array of IR light emitting diodes (LEDs). The method includes capturing a second image of the scene under selective IR lighting from the IR light source, detecting the face in the second image, and identifying a person based on the face in the second image.

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: The invention relates to a lighting arrangement with at least one LED lighting element (15) arranged on a support member (12). An optical element (16) is arranged spaced from the LED lighting element (15) in a first direction O. A holder (14) is provided to hold the optical element (16) in a position relative to the LED lighting element (15). The holder (14) comprises at least a first holding portion (24a) extending from the support member (12) into the first direction O and a second holding portion (24b) connected to the optical element (16). The second holding portion (24b) is arranged such that at least a part extends into the first direction O. The second holding portion (26b) is spaced from the first holding portion (24a) in a direction traverse to the first direction O.

Abstract: A packaged light emitting device die 20 includes a package body having a profiled leadframe 10 embedded in a body 12 of reflecting material. The leadframe 10 is exposed on mounting surface 14 only on at least one solder bonding area 16. Solder 22 is present only on the at least one solder bonding area 16 and not elsewhere. The reflecting material provides the reflecting parts of the package so there is no need for a reflective layer to be deposited on leadframe 10. Moreover, the reflecting material can function as a solder resist to self-align the solder 22 to the at least one solder bonding area 16.

Abstract: The invention relates to a lighting arrangement with at least one LED lighting element (15) arranged on a support member (12). An optical element (16) is arranged spaced from the LED lighting element (15) in a first direction O. A holder (14) is provided to hold the optical element (16) in a position relative to the LED lighting element (15). The holder (14) comprises at least a first holding portion (24a) extending from the support member (12) into the first direction O and a second holding portion (24b) connected to the optical element (16). The second holding portion (24b) is arranged such that at least a part extends into the first direction O. The second holding portion (26b) is spaced from the first holding portion (24a) in a direction traverse to the first direction O.