Abstract: An electrical power converter can include a plurality of layers disposed on a substrate. An emitter, including a first semiconductor junction that is formed at an interface between a first pair of adjacent layers, can produce light in response to a first electrical signal. An absorber, including a second semiconductor junction that is formed at an interface between a second pair of adjacent layers, can absorb at least some of the light. Circuitry can produce a second electrical signal in response to the absorbed light. The second electrical signal can be substantially proportional to the first electrical signal and can be electrically isolated from the first electrical signal. Because the light can remain within the layers during use, the electrical power converter can have a higher efficiency than a comparable device that propagates the light through at least one interface between air and a semiconductor material.

Abstract: An electrical power converter can include a plurality of layers disposed on a substrate. An emitter, including a first semiconductor junction that is formed at an interface between a first pair of adjacent layers, can produce light in response to a first electrical signal. An absorber, including a second semiconductor junction that is formed at an interface between a second pair of adjacent layers, can absorb at least some of the light. Circuitry can produce a second electrical signal in response to the absorbed light. The second electrical signal can be substantially proportional to the first electrical signal and can be electrically isolated from the first electrical signal. Because the light can remain within the layers during use, the electrical power converter can have a higher efficiency than a comparable device that propagates the light through at least one interface between air and a semiconductor material.

Abstract: An electrical power converter can include a plurality of layers disposed on a substrate. An emitter, including a first semiconductor junction that is formed at an interface between a first pair of adjacent layers, can produce light in response to a first electrical signal. An absorber, including a second semiconductor junction that is formed at an interface between a second pair of adjacent layers, can absorb at least some of the light. Circuitry can produce a second electrical signal in response to the absorbed light. The second electrical signal can be substantially proportional to the first electrical signal and can be electrically isolated from the first electrical signal. Because the light can remain within the layers during use, the electrical power converter can have a higher efficiency than a comparable device that propagates the light through at least one interface between air and a semiconductor material.

Abstract: An electrical power converter can include a plurality of layers disposed on a substrate. An emitter, including a first semiconductor junction that is formed at an interface between a first pair of adjacent layers, can produce light in response to a first electrical signal. An absorber, including a second semiconductor junction that is formed at an interface between a second pair of adjacent layers, can absorb at least some of the light. Circuitry can produce a second electrical signal in response to the absorbed light. The second electrical signal can be substantially proportional to the first electrical signal and can be electrically isolated from the first electrical signal. Because the light can remain within the layers during use, the electrical power converter can have a higher efficiency than a comparable device that propagates the light through at least one interface between air and a semiconductor material.

Abstract: A light-emitting apparatus can provide disinfecting, temperature-variable white light while compensating for a color shift provided by UV-A light. A lighting apparatus can include a plurality of blue light emitting diodes (LEDs), a plurality of red LEDs, a plurality of green LEDs, a plurality of ultraviolet A (UV-A) LEDs, driver circuitry coupled to the plurality of blue LEDs, the plurality of red LEDs, the plurality of green LEDs, and the plurality of UV-A LEDs, and controller circuitry configured to receive a white color temperature and provide signals to the driver circuitry that cause the driver circuitry to drive the plurality of blue LEDs, plurality of red LEDs, plurality of green LEDs, and plurality of UV-A LEDs to generate white light at the white color temperature and compensate for a color shift provided by the plurality of UV-A LEDs.

Abstract: Disclosed is an inductive charging system for a portable electronic device, the system incorporating at least one induction coil and having a receiving face for the application of the device including a receiving coil positioned on the receiving face in electromagnetic contact with the induction coil. The receiving face includes multiple series of tabs defining at least discontinuously a perimeter corresponding to the device, the tabs of each series projecting from the receiving face in a first position being movable from the first position to a second position in which each tab is retracted into the receiving face under an application of a force corresponding to that exerted on this tab by the device when applied against the receiving face.

Abstract: Disclosed is an inductive charging system for a portable electronic device, the system incorporating at least one induction coil and having a receiving face for the application of the device including a receiving coil positioned on the receiving face in electromagnetic contact with the induction coil. The receiving face includes multiple series of tabs defining at least discontinuously a perimeter corresponding to the device, the tabs of each series projecting from the receiving face in a first position being movable from the first position to a second position in which each tab is retracted into the receiving face under an application of a force corresponding to that exerted on this tab by the device when applied against the receiving face.