Abstract: A light detection and ranging system 100 for use with a vehicle 500. The system includes a transmitter 102 configured to transmit three transmission wavelengths nominally in a range from 800 nm to 1700 nm. A receiver is configured to receive three reflected signals 114, each of the three reflected signals 114 being a portion of an associated one of the three transmission wavelengths reflected to the receiver 104 from a roadway object 112. A controller 106 provides a categorization output in response to comparing reflectance values of the three reflected signals 114 to categorize the roadway object 112 into one of a plurality of pre-defined material-type categories. A method of controlling the travel of a vehicle based on a categorization output from a controller 106 is also provided.

Abstract: A system and method for determining vehicle position uses light based communication (LBC) signals and a time-of-flight (TOF) pulse. Each vehicle includes a LBC system having light emitting diodes (LEDs) and receiver photodiodes capable of sending and receiving pulsed light binary messages. The LBC system may also include a TOF transceiver for sending and receiving TOF pulses, or the transmitter and receiver diodes may be used to send and receive TOF pulses. Each LBC system has a controller coupled to the transmitter diodes and receiver diodes (and the TOF transceiver when present). The controller includes a processor configured to determine the distance between vehicles. Optical characteristics are used to discern relative angle, a header is used to determine relative orientation, and the time-of-flight is used to determine distance, which together may be used by the processor to determine the relative location between transmitting vehicle and the receiving vehicle.

Abstract: A system and method for resolving the angle of the transmitter and the angle of the receiver when determining vehicle position using light based communication (LBC) signals. Each vehicle includes an LBC system having light emitting diodes (LEDs) and receiver photodiodes capable of sending and receiving pulsed light binary messages. Each LBC system has a controller coupled to the transmitter diodes and receiver diodes. The controller includes a processor configured to resolve the angle of the transmitter and the angle of the receiver. The angle of the receiver may be determined using a single digital message received at a first receiver and a second receiver on a receiving vehicle. The angle of the transmitter may be determined using a first digital message and a second digital message received at a same receiver on the receiving vehicle.

Abstract: Lighting methods and systems to enhance the browsing behaviors of shoppers in a manner intended to be primarily subconscious include illumination of a targeted area, such as a typical retail display, with a tunable spectrum lamp that slowly cycles through different illumination spectra such that color rendering of illuminated target is deliberately varied for subtle arousal of the visual senses. The illumination spectra, and the rates at which spectral conditions are changed, are both chosen as such that multi-colored objects in the targeted area change in appearance in a barely noticeable way, such that shoppers may find their visual attention redirected, seemingly at random, to a wider variety of products on display. Color spectrum changes also may be controlled in coordination with predefined packaging colors to create quasi-animation effects.

Abstract: A system and method for determining vehicle position uses light based communication (LBC) signals and a time-of-flight (TOF) pulse. Each vehicle includes a LBC system having light emitting diodes (LEDs) and receiver photodiodes capable of sending and receiving pulsed light binary messages. The LBC system may also include a TOF transceiver for sending and receiving TOF pulses, or the transmitter and receiver diodes may be used to send and receive TOF pulses. Each LBC system has a controller coupled to the transmitter diodes and receiver diodes (and the TOF transceiver when present). The controller includes a processor configured to determine the distance between vehicles. Optical characteristics are used to discern relative angle, a header is used to determine relative orientation, and the time-of-flight is used to determine distance, which together may be used by the processor to determine the relative location between transmitting vehicle and the receiving vehicle.

Abstract: Structures for transitioning between two layers of differing lattice parameters are disclosed. In some embodiments, the structures are in the form of a superlattice that serves as a strain relieving transition between two layers of differing lattice parameters. By controlling the properties of the superlattice, the superlattice can exhibit desirable properties such as transparency to light and lattice matching to one of the two layers of differing lattice parameters. Optoelectronic devices such as light emitting diodes including such superlattices are also disclosed.

Abstract: A system for controlling a light source to enhance the appearance of one or more objects within an environment illuminated by the light source. The system includes a tunable white light source to illuminate an object and a camera configured to capture one or more digital images the object and identify attributes of the object, including object color values. The system further includes a light control module configured to determine at least one optimal lighting condition for the light source based, at least in part, on the object attributes, wherein the optimal lighting condition is configured to enhance the appearance of the object illuminated by the light source while maintaining the overall appearance of light within the environment. The light control module is further configured to adjust the spectral composition of the light source based on the optimal lighting condition.

Abstract: Structures for transitioning between two layers of differing lattice parameters are disclosed. In some embodiments, the structures are in the form of a superlattice that serves as a strain relieving transition between two layers of differing lattice parameters. By controlling the properties of the superlattice, the superlattice can exhibit desirable properties such as transparency to light and lattice matching to one of the two layers of differing lattice parameters. Optoelectronic devices such as light emitting diodes including such superlattices are also disclosed.

Abstract: A system for controlling a light source to enhance the appearance of one or more objects within an environment illuminated by the light source. The system includes a tunable white light source to illuminate an object and a camera configured to capture one or more digital images the object and identify attributes of the object, including object color values. The system further includes a light control module configured to determine at least one optimal lighting condition for the light source based, at least in part, on the object attributes, wherein the optimal lighting condition is configured to enhance the appearance of the object illuminated by the light source while maintaining the overall appearance of light within the environment. The light control module is further configured to adjust the spectral composition of the light source based on the optimal lighting condition.

Abstract: A light source that generally includes multiple light emitting diode (LED) sources emitting light at different colors. A controller energizes the LED sources for establishing a changing pattern of the light colors to provide a decorative effect while simultaneously establishing white light illumination of a target area.

Abstract: A light source that generally includes multiple light emitting diode (LED) sources emitting light at different colors. A controller energizes the LED sources for establishing a changing pattern of the light colors to provide a decorative effect while simultaneously establishing white light illumination of a target area.

Abstract: A method and system for controlling lighting in a space reduces energy consumption of the light sources by changing at least one of the color rendering index (CRI) and the correlated color temperature (CCT) while maintaining illumination levels. Preferably, the method and system sense movement of people in the space relative to light sources that light the space, and automatically and individually adjust plural solid state lighting devices that form each of the respective light sources to a first lighting condition when people are in a first position, wherein the lamps respectively emit light of a first illumination level and a first CRI at a first electrical power level, and to a second lighting condition when people are in a second position, wherein the light sources respectively emit light of the first illumination level and a smaller CRI than the first CRI and at a lower electrical power level than the first electrical power level.

Abstract: A method and system for controlling lighting in a space reduces energy consumption of the light sources by changing at least one of the color rendering index (CRI) and the correlated color temperature (CCT) while maintaining illumination levels. Preferably, the method and system sense movement of people in the space relative to light sources that light the space, and automatically and individually adjust plural solid state lighting devices that form each of the respective light sources to a first lighting condition when people are in a first position, wherein the lamps respectively emit light of a first illumination level and a first CRI at a first electrical power level, and to a second lighting condition when people are in a second position, wherein the light sources respectively emit light of the first illumination level and a smaller CRI than the first CRI and at a lower electrical power level than the first electrical power level.

Abstract: A method and system for controlling lighting in a space reduces energy consumption of the light sources by changing at least one of the color rendering index (CRI) and the correlated color temperature (CCT) while maintaining illumination levels. Preferably, the method and system sense movement of people in the space relative to light sources that light the space, and automatically and individually adjust plural solid state lighting devices that form each of the respective light sources to a first lighting condition when people are in a first position, wherein the lamps respectively emit light of a first illumination level and a first CRI at a first electrical power level, and to a second lighting condition when people are in a second position, wherein the light sources respectively emit light of the first illumination level and a smaller CRI than the first CRI and at a lower electrical power level than the first electrical power level.

Abstract: A lighting apparatus, particularly for the use as lighting elements in signage or as backlighting apparatus, which comprises a cavity formed by a light emitting front side, a reflective backside arranged opposite to the front side and a sidewall, and a plurality of light emitting semiconductor components mounted on the sidewall in such a way that their light is irradiated in the cavity. The reflective backside of the cavity is formed in such a way that the cavity is divided into at least two partitions directing the light to the front side.

Abstract: An illumination device comprising at least four luminous units (1, 2), the light emitted by at least two of the four luminous units (1, 2) being suitable for being mixed to form white light. Moreover, an apparatus (3) for dimming at least one of the four luminous units (1, 2) is provided. White light having a desired color temperature (CCT) and a high color rendering index can be generated by means of the illumination device.

Abstract: A method and system for controlling lighting in a space reduces energy consumption of the light sources by changing at least one of the color rendering index (CRI) and the correlated color temperature (CCT) while maintaining illumination levels. Preferably, the method and system sense movement of people in the space relative to light sources that light the space, and automatically and individually adjust plural solid state lighting devices that form each of the respective light sources to a first lighting condition when people are in a first position, wherein the lamps respectively emit light of a first illumination level and a first CRI at a first electrical power level, and to a second lighting condition when people are in a second position, wherein the light sources respectively emit light of the first illumination level and a smaller CRI than the first CRI and at a lower electrical power level than the first electrical power level.