A wireless vehicle charging system is provided herein. The charging system includes a charging station having a power source and a charging station interface operably coupled to a primary coil assembly. The primary coil assembly includes a primary coil therein for generating a magnetic field. An illumination system is disposed within the primary coil assembly and includes a passive illumination system and an active illumination system. A first photoluminescent structure is disposed within the passive illumination system and is configured to luminesce in response to excitation by an incident light. A second photoluminescent structure is disposed within the active illumination system and is configured to luminesce in response to excitation by a light source. A vehicle having a secondary coil assembly thereon is operably coupled with a rectifier and is configured to transmit electrical current from the secondary coil assembly to a battery.

A light exposure system includes an external apparatus that is placed on a facility and a portable terminal that communicates with the external apparatus, and manages the amount of light which the user is exposed to. Furthermore, the external apparatus transmits information regarding the amount of light which the user is exposed to, to the portable terminal. In addition, the portable terminal includes: a terminal-side controller which receives the information from the external apparatus and calculates the cumulative value of the amount of light from the information, when a communication is established with the external apparatus; and a display that displays the cumulative value calculated by the terminal-side controller.

A light emitting diode (LED) tube lamp configured to receive an external driving signal includes an LED module for emitting light, the LED module comprising an LED unit comprising an LED; a rectifying circuit for rectifying the external driving signal to produce a rectified signal, the rectifying circuit having a first output terminal and a second output terminal for outputting the rectified signal; a filtering circuit connected to the LED module, and configured to provide a filtered signal for the LED unit; and a protection circuit for providing protection for the LED tube lamp. The protection circuit includes a voltage divider comprising two elements connected in series between the first and second output terminals of the rectifying circuit, for producing a signal at a connection node between the two elements; and a control circuit coupled to the connection node between the two elements, for receiving, and detecting a state of, the signal at the connection node. The control circuit includes or is coupled to a switching circuit coupled to the rectifying circuit, and the switching circuit is configured to be triggered on or off by the detected state, upon the external driving signal being input to the LED tube lamp, to allow discontinuous current to flow through the LED unit.

A thermal management system for an object comprising: one or more thermoelectric elements, one or more light emitting sources, electricity transport medium; electrical energy storage, and a controller. Heat energy that is generated or absorbed by the object is converted by said thermoelectric element to electrical energy. This energy is transferred to light emitting source to emit the energy to the environment or delivered to the electrical energy storage or back to the thermoelectric elements using the electricity transport medium and the controller to achieve the thermal goal of the thermal management system.

Exemplary methods, apparatuses, and systems generate an object in a portion of an electronic display. The object is generated as a shape formed by a pattern of a first plurality of pixels being illuminated for a first sequence of frames and a second plurality of pixels not being illuminated for the first sequence of frames. During the first sequence of frames, each set of illuminated pixels from the first plurality of pixels is separated from another set of illuminated pixels by a set of non-illuminated pixels of the second plurality of pixels. In response to an event, the object in the portion of the electronic display is generated by illuminating pixels of the second plurality of pixels for a second sequence of frames and not illuminating pixels within the first plurality of pixels for the second sequence of frames.

Various examples related to automatic light control for illumination of a feature of interest are presented. A lighting system can automatically track a feature of interest, and/or a target positioned in relation to a feature of interest, and position one or more light sources to maintain illumination of the feature of interest. The location of the target, or the feature of interest, can be tracked using images captured by an image capture device and the orientation of one or more light sources can be adjusted to direct beams of light at the feature of interest. The beams of light can produce substantially shadow free illumination of the feature of interest. The controller can automatically calibrate a light source based on identifiable features within a captured image to ensure accurate movement of the light sources when tracking the target or feature of interest in or near real time.

A power supply using a microcontroller for circuit protection and an LED lighting system using the power supply are disclosed. A power supply according to embodiments of the present invention includes a floating converter and at least a first reference voltage source connected to a negative output terminal of the floating converter. A microcontroller is connected to the first reference voltage source and to a control input of the floating converter, which may be a floating buck converter. In some embodiments, a second reference voltage source is connected to the microcontroller. A voltage divider and/or a comparator can be used to provide one or both voltage reference sources.

A current to be supplied to a load driven by the current is linearly controlled in accordance with a voltage. A voltage-current converter according to the present invention includes a differential amplifier, a first current mirror, and a voltage setting unit. The differential amplifier receives an input voltage from an input terminal and outputs a voltage in accordance with a difference between the input voltage and a threshold voltage. The first current mirror receives the voltage from the differential amplifier and outputs an output current to an output terminal. The voltage setting unit sets the threshold voltage.

A PWM dimmer includes a source terminal, a load terminal, a power stage, an interface, and control circuitry. The power stage is coupled between the source terminal and the load terminal and is configured to receive from the source terminal an AC supply signal and provide a pulsed AC load signal to the load terminal in response to a control signal. The AC supply signal has a sinusoidal envelope with a positive half-cycle and a negative half-cycle for each cycle. The pulsed AC load signal tracks the envelope and includes a plurality of pulses in the positive half-cycle and the negative half-cycle for each cycle. The interface is configured to receive dimming control information bearing on a dimming level from a user or remote terminal. The control circuitry is configured to receive the dimming control information from the interface and generate the control signal based on the dimming control information.

An improved LCD backlighting unit (“BLU”) particularly a BLU which uses light emitting diode (“LED”) light sources especially white LED light sources, enhances a liquid crystal display's (“LCD's”) readability in sunlight. The improved BLU briefly increases a display screen's brightness, typically 2-6× greater than a BLU's maximum continuous operating brightness. The BLU and its associated LED driver provide substantially increased brightness for a predefined and relatively short interval, typically 2 to 60 seconds, without damage. The LED driver control prevents boosting the display brightness too frequently or for too long thereby avoiding system damage by adequately dissipating the increased power. The BLU may include a thermal sensor on or near the LEDs to provide real time temperature feedback to the LED driver control. Temporarily boosting the BLU's brightness helps any outdoor daylight application such as commercial drones where the sun can easily wash out a display an the drone's controller.