A stepless dimming control method of a lighting system is applicable to the situations where a light source for a lighting terminal is a fluorescent lamp and/or an LED lamp. A pulsating voltage regulating device is connected in series with a main power supply circuit of a terminal light source. A dimming control unit is configured for a fluorescent lamp electronic ballast/LED driving unit. The specific method includes: at first, fluctuating a supply voltage value at an input end of the electronic ballast/LED driving unit for a short time by the pulsating voltage regulating device, and then regulating, by the dimming control unit, an output frequency of the electronic ballast and an output current of the LED driving unit according to fluctuation parameters and also in combination with preset system settings, so as to realize dimming. The method can realize remote and stepless dimming, is applicable to the terminal light sources of both fluorescent lamps and LED lamps, has good interference resistance and relatively low system construction/improvement costs, and is extremely suitable for newly-built lighting systems and for use in upgrading existing lighting systems.

A stepless dimming control method of a lighting system is applicable to the situations where a light source for a lighting terminal is a fluorescent lamp and/or an LED lamp. A pulsating voltage regulating device is connected in series with a main power supply circuit of a terminal light source. A dimming control unit is configured for a fluorescent lamp electronic ballast/LED driving unit. The specific method includes: at first, fluctuating a supply voltage value at an input end of the electronic ballast/LED driving unit for a short time by the pulsating voltage regulating device, and then regulating, by the dimming control unit, an output frequency of the electronic ballast and an output current of the LED driving unit according to fluctuation parameters and also in combination with preset system settings, so as to realize dimming. The method can realize remote and stepless dimming, is applicable to the terminal light sources of both fluorescent lamps and LED lamps, has good interference resistance and relatively low system construction/improvement costs, and is extremely suitable for newly-built lighting systems and for use in upgrading existing lighting systems.

Indicator circuit having a backlight and an indicator light associated with a graphical element. The graphical element is adapted to be illuminated by the indicator light for indicating an active vehicle function as well as backlit by the backlight. A switch coupled to the backlight selectively turns OFF the backlight in response to a drive signal supplied by the indicator light. In this manner, the backlight is OFF when the graphical element is illuminated by the indicator light.

Indicator circuit having a backlight and an indicator light associated with a graphical element. The graphical element is adapted to be illuminated by the indicator light for indicating an active vehicle function as well as backlit by the backlight. A switch coupled to the backlight selectively turns OFF the backlight in response to a drive signal supplied by the indicator light. In this manner, the backlight is OFF when the graphical element is illuminated by the indicator light.

A light-emitting diode driving module includes an LED driving circuit to activate light-emitting diodes driven by a rectified voltage, and to adjust driving current conducted through driving nodes to the light-emitting diodes depending on a voltage of a driving current setting node; and a driving current controller to control the voltage of the driving current setting node by outputting a driving current control signal. The driving current controller includes a control signal output circuit connected to a dimming node to receive a dimming signal when the rectified voltage is modulated, and to adjust the driving current control signal depending on the dimming signal; a mode detector to detect whether the rectified voltage is modulated by receiving a source voltage depending on the rectified voltage, and to enable a selection signal depending on a detection result; and a power compensator to adjust the driving current control signal when the selection signal is enabled.

A lighting device capable of performing satisfactory light emission control while suppressing a rise in the temperature of the lighting device irrespective of the attachment of an optical accessory. In the lighting device, an accessory detection section detects whether or not an optical accessory for color adjustment or light distribution angle adjustment is attached to a light emission section, and light emission performed by the light emission section is limited based on a result of detection performed by the accessory detection section.

A lighting device capable of performing satisfactory light emission control while suppressing a rise in the temperature of the lighting device irrespective of the attachment of an optical accessory. In the lighting device, an accessory detection section detects whether or not an optical accessory for color adjustment or light distribution angle adjustment is attached to a light emission section, and light emission performed by the light emission section is limited based on a result of detection performed by the accessory detection section.

The present invention refers to an Electrical Power System (EPS) or Power Supply for a smart switch for controlling up to three independent lighting loads (3 gang) within an electrical installation that has two or three wires in the switch box (two-wire and three-wire switches). The smart switch is able to operate in a conventional switch box without access to the neutral wire. If the lighting device is a low power lighting device, only one adapter is used to avoid flickering or unintentional lighting. The Power Supply also provides a voltage signal indicating the current consumed by the lighting loads.

The present invention refers to an Electrical Power System (EPS) or Power Supply for a smart switch for controlling up to three independent lighting loads (3 gang) within an electrical installation that has two or three wires in the switch box (two-wire and three-wire switches). The smart switch is able to operate in a conventional switch box without access to the neutral wire. If the lighting device is a low power lighting device, only one adapter is used to avoid flickering or unintentional lighting. The Power Supply also provides a voltage signal indicating the current consumed by the lighting loads.

System and/or method generally relate to extending a lifespan of an excimer lamp. The system includes a ultra-violet (UV) light having a pair of dielectrics configured to separate electrodes. One of the electrodes includes a metal mesh. The system includes a power supply electrically coupled to the UV light and configured to deliver electrical power to the UV light. The system includes a temperature sensor operably coupled to the UV light. The temperature sensor is configured to generate a temperature signal indicative of a temperature of the UV light. The system includes at least one processor. The at least one processor is configured to determine a temperature of the UV light based on the temperature signal, and adjust the electrical power delivered to the UV light based on the temperature signal.