Abstract: A system and method for an accent lighting system is provided. The system includes a plurality of underwater luminaires each having a plurality of light emitting diodes, and a junction box controller housing a plurality of electrical components for generating electrical signals for controlling the plurality of underwater luminaries. The junction box controller can be mounted to an electrical conduit and a plurality of cables can connect the plurality of underwater luminaires with the junction box controller. An underwater luminaire can include a heat sink and a flexible circuit board having a plurality of light emitting diodes mounted on the heat sink. The flexible circuit board transfers heat from the light emitting diodes to the heat sink. The underwater luminaire can also include a wiring harness for connecting the underwater luminaire to a cable. The underwater luminaire can also include a housing having a lens positioned at one end, an end cap mounted to an opposite end of the housing.

Abstract: A tunable antenna system is provided for a wearable personal computing device, such as a smartwatch. The tunable antenna system includes at least two antennas configured for respective sets of frequency ranges. One or more radiating elements of the antennas are formed from portions of a metal bezel of the wearable personal computing device. For at least one of the antennas, an aperture tuner and an impedance tuner positioned within the metal bezel are provided, e.g., to tune between various communication bands. Non-conductive slits may be positioned within the metal bezel to provide isolation between the antennas. A ground plane of the antenna system may be formed by a metallic component of the wearable personal computing device. The antenna system can be insulated from a wearer's skin by a non-metallic back cover and optionally a glass back plate arranged to contact the wearer's skin or clothing during use.

Abstract: A control system for a switchable privacy display apparatus comprises an ambient light sensor, a controllable light source and a display controller arranged to control the light source and the display luminance. High image visibility is provided for public mode operation while in privacy mode visual security level above a perceived privacy threshold may be obtained by means of control of image luminance and display illuminance, in response to the output of the ambient light sensor.

Abstract: A light structure that includes a driver electronics housing including two laterally disposed compartments for electrical connections on opposing sides of a centrally positioned compartment including driver electronics, wherein a first compartment of the two laterally disposed compartments includes a main power connector for connection to a main power source. The light structure further includes a light engine housing having a recessed down light structure geometry for containing a light emitting diode (LED) light source. The light structure further includes a reversible driver to light source connector for electrically connecting the light engine housing containing the light emitting diode (LED) light source and the driver electronics housing including the driver electronics.

Abstract: To provide a light-emitting device whose amount of light can be adjusted, or the like. The amount of light emitted from the light-emitting device can be adjusted by controlling the magnitude of the constant current pulse by a control signal. Specifically, the light-emitting device includes a constant current supply configured to be supplied with a control signal and a control pulse signal and configured to supply a constant current pulse; a control device configured to supply the control signal; a driver circuit configured to supply the control pulse signal; and a light-emitting panel configured to be supplied with the constant current pulse. The control signal is a signal for controlling the magnitude of the constant current pulse. The light-emitting panel includes a light-emitting element. The current density of the light-emitting element is greater than or equal to 10 mA/cm2 and less than or equal to 1000 mA/cm2.

Abstract: An LED luminaire comprises LED arrays, a full-wave rectifier, an LED driving circuit, and electric current bypass circuit(s). The full-wave rectifier is coupled to an external power-line dimmer which is coupled to the AC mains and configured to convert a phase-cut line voltage into a first DC voltage. With the electric current bypass circuit(s) to partially provide a holding current path to cause the external power-line dimmer to sustain a dimming function, the LED driving circuit can provide a second DC voltage with various driving currents according to various input power levels to drive LED arrays without flickering. By adapting switching frequencies and a duty cycle, the LED driving circuit can regulate the second DC voltage to reach a voltage level equal to or greater than a forward voltage of the LED arrays no matter whether the first DC voltage is higher or lower than the second DC voltage.

Abstract: Disclosed herein is an electronic device including a coaxial cable connected to an antenna and a conductive body having a strip-like shape and being electrically coupled to an external conductor of the coaxial cable, an end of the conductive body not being electrically connected other conductive members.

Abstract: A dimmer, including a housing assembly including a plurality of terminals at least partially disposed therein, the plurality of terminals including a line terminal, a neutral terminal, and a load terminal; at least one variable control mechanism coupled to the housing assembly, the at least one variable control mechanism being configured to adjustably select a user adjustable load setting, the user adjustable load setting being adjustable between a minimum setting and a maximum setting; a series pass element disposed in series the line terminal and the load terminal; a sensor producing a sensor output representative of load current at the load terminal; and a controller configured to determine, according to a characteristic of the load current, whether a load connected to the load terminal is a capacitive load, wherein the controller is further configured to, upon determining that the load is a capacitive load, provide sufficient power to the load sufficient to cause the load to illuminate before reducing the

Abstract: A method of controlling light adjustment include activating a power supply; activating a digital control circuit to carry out an adjustment output voltage control mode, sense a signal from a light adjustment control switching circuit, and determine a light adjustment control mode; in response to an LED power source operating in the adjustment output voltage control mode, adjusting luminance from 100% to N % and continuously adjusting luminance from N % to ?0.01% wherein a 100% PWM signal output from a PWM driving signal circuit is unchanged, and a light adjustment signal collection circuit transmits a collected light adjustment signal having luminance between N % and ?0.01% to the digital control circuit; in response to the LED power source operating in a PWM adjustment control mode, adjusting luminance from 100% to N % and continuously adjusting luminance from N % to ?0.01%; and obtaining a light adjustment curve.

Abstract: A dimming and color mixing apparatus for light emitting diodes (LEDs) combines constant current distribution with reduced pulse widths. A current source provides a constant source of LED drive current to at least a pair of switches under command of an LED controller. A predefined fraction of the LED rated current that will ensure uniform light output between the LEDs is selected as a minimum drive current to be supplied from the constant current source. The LED controller causes the switches to provide alternating pulses between at least two channels of LEDs according to a switching rate for color mixing, and the current source decreases the LED drive current linearly for dimming. For dimming levels below the minimum drive current, the LED controller decreases the pulse widths in conjunction with the decreased drive current.

Abstract: An illustrative example electronic device includes a signal generator having at least one conductive output member. A substrate integrated waveguide (SIW) includes a substrate and a plurality of conductive members in the substrate. The substrate includes a slot in one exterior surface of the substrate. The slot is situated adjacent the at least one conductive output member of the signal generator such that a signal of the signal generator is coupled into the SIW through the slot.

Abstract: A lighting apparatus includes a light source, a power converter, an optical coupler, a light sensor, a frequency detector and a controller. The light source includes a LED module. The light switch is connected to the LED module in series. The light switch selectively turns on and turning off the LED module according to a second PWM signal. The power converter converts an alternating current power source with a working frequency to a direct current power. The optical coupler controls the power converter to work in a constant current mode or a constant voltage mode according to a first PWM signal.

Abstract: The sensing type lamp fixture executes an initialization procedure to calculate an ambient brightness value to determine whether entering the nighttime and to generate a nighttime-entering command. The sensing type lamp fixture will light up and start timing a nighttime value and automatically adjust the brightness at various adjustment times during the night. The sensing type lamp fixture will continuously detect the ambient brightness to determine whether it has entered the daytime. If not, the nighttime value will continue to be timed until entering the daytime. Then the lamp fixture will be off and stop timing the nighttime value and generate a midnight time of the next night. The sensing type lamp fixture calculates the brightness adjustment times of the next night according to the midnight time, and automatically adjusts the light-on time of the sensing type lamp fixture and automatically adjusts the brightness to save power and energy.

Abstract: A luminaire can include a housing having at least one outer surface that forms a cavity. The luminaire can also include at least one electrical component disposed, at least in part, within the cavity. The luminaire can further include an electrical cable having a first end and a second end, where the first end is coupled to the at least one electrical component. The luminaire can also include a switch coupled to the electrical cable, where the switch is disposed remotely from the housing, where the switch has multiple positions, wherein each position of the switch corresponds to a discrete photometric distribution emitted by one or more light sources of the luminaire.

Abstract: LED lamp systems having improved light quality are disclosed. The lamps emit more than 500 lm and more than 2% of the power in the spectral power distribution is emitted within a wavelength range from about 390 nm to about 430 nm.

Abstract: A lighting device with physiological dimming and a dimming method for the same are provided. The lighting device includes a lighting unit with lighting modules, a light sensor, and a control circuit. According to a first illumination requirement and a light sensing value of the light sensor, the control circuit controls the lighting unit to output a first illumination light source that meets a first predetermined illuminance in a first time slot. According to a second illumination requirement and the light sensing value, the control circuit controls the lighting unit to output a second illumination light source that meets a second predetermined illuminance in a second time slot. According to the first and the second illumination requirements, the control circuit dynamically controls lighting from any one or a combination of the lighting modules, such that the lighting unit generates correspondingly the first and the second illumination light sources.

Abstract: A method for operating a control system for controlling a lighting system. The control system includes at least two lighting control modules, each lighting control module including at least one digital processor and at least one digital memory for generating, managing and storing lighting programs. Each lighting control module includes a housing in which the digital processor and the digital memory are disposed. Digital adjusting commands are generated in each lighting control module, and are transmittable to the lighting devices of the lighting system via data links. The different lighting control modules are able to exchange data via data lines and interfaces. A system time signal is generated in a lighting control module and is transmitted to all lighting control modules of the control system via the data lines, and the lighting programs in the different lighting control modules are executed using the system time signal.

Abstract: A dimming module having: a calculating circuit, configured to receive a preset current duty cycle reference signal, a preset current magnitude reference signal and a feedback voltage of an associated light-emitting device string, and to provide a current duty cycle reference signal and a current magnitude reference signal; and a current regulating circuit, configured to receive the feedback voltage of the associated light-emitting device string, the current duty cycle reference signal and the current magnitude reference signal, and to control a duty cycle and a magnitude of the current flowing through the associated light-emitting device string; wherein the current magnitude reference signal provided to the light-emitting device string with the minimum feedback voltage is lower than the preset current magnitude reference signal, while the current magnitude reference signal provided to each other light-emitting device string is higher than the preset current magnitude reference signal.

Abstract: An LED board comprises an arrangement of LEDs, a current sensor for sensing a current flowing through the arrangement of LEDs and a cut-off switch in series with the arrangement of LEDs. The cut-off switch is controlled in dependence on the sensed current. In this way, over-current protection is provided at the LED board level, without needing any signal communication between the LED board and the LED driver.

Abstract: A lighting apparatus is connected to a dimmer and an external power source. The lighting apparatus includes a light source and a driver. The driver is used for converting the external power source to a driving current supplied to the light source. The driver includes a rectifier module, a constant voltage module, a control module, a constant current module, and a power module. The rectifier module is connected to the dimmer for rectifying a dimming voltage to a rectified voltage. The constant voltage module is connected to the rectifier module for providing a first constant voltage power according to the rectified voltage.