Submersible lights including housings and a multilayer stack for pressure transfer are disclosed. A transparent pressure-bearing window, a window support structure, a circuit element populated with LEDs, and a pressure support structure may be mounted inside the housing. The support structure may be structured to bear at least some of the pressure applied to the transparent window from external pressure sources. The support structures may also be adapted to transfer thermal energy to an exterior environment such as sea water.

Submersible lights including housings and a multilayer stack for pressure transfer are disclosed. A transparent pressure-bearing window, a window support structure, a circuit element populated with LEDs, and a pressure support structure may be mounted inside the housing. The support structure may be structured to bear at least some of the pressure applied to the transparent window from external pressure sources. The support structures may also be adapted to transfer thermal energy to an exterior environment such as sea water.

A lighting apparatus includes a wireless circuit board, a driver circuit board, a light source plate, a metal cover and a metal housing. The wireless circuit board is mounted with a wireless circuit. The wireless circuit has a first reference ground terminal. The driver circuit board is mounted with a driver circuit. The driver circuit has a second reference ground terminal. The light source plate is mounted with a LED module. The light source plate is placed on a top side of the metal cover. The first reference ground terminal and the second reference ground terminal are connected to the metal cover as a reference ground. The metal housing and a bottom side of the metal cover forms a container space for holding the driver circuit board and a first portion of the wireless circuit board.

A lighting apparatus includes a wireless circuit board, a driver circuit board, a light source plate, a metal cover and a metal housing. The wireless circuit board is mounted with a wireless circuit. The wireless circuit has a first reference ground terminal. The driver circuit board is mounted with a driver circuit. The driver circuit has a second reference ground terminal. The light source plate is mounted with a LED module. The light source plate is placed on a top side of the metal cover. The first reference ground terminal and the second reference ground terminal are connected to the metal cover as a reference ground. The metal housing and a bottom side of the metal cover forms a container space for holding the driver circuit board and a first portion of the wireless circuit board.

The present disclosure relates to a technology for driving an LED, comprising sensing a forward-direction voltage of an LED and determining whether or not the LED is defective by comparing the forward-direction voltage with a comparative object voltage, wherein the comparative object voltage is continuously updated using a sensed forward-direction voltage so that the comparative object voltage may be set to be an unfixed value, that is, a value reflecting a current state of an LED. This allows a more accurate detection of a defect of an LED.

The present disclosure relates to a technology for driving an LED, comprising sensing a forward-direction voltage of an LED and determining whether or not the LED is defective by comparing the forward-direction voltage with a comparative object voltage, wherein the comparative object voltage is continuously updated using a sensed forward-direction voltage so that the comparative object voltage may be set to be an unfixed value, that is, a value reflecting a current state of an LED. This allows a more accurate detection of a defect of an LED.

System and method for regulating one or more currents. The system includes a system controller, an inductor, a first resistor, a switch and a first diode. The system controller includes a first controller terminal and a ground terminal, the system controller being configured to output a drive signal at the first controller terminal. The inductor includes a first inductor terminal and a second inductor terminal, the first inductor terminal being coupled to the ground terminal, the second inductor terminal being coupled to one or more light emitting diodes. The first resistor includes a first resistor terminal and a second resistor terminal, the first resistor terminal being coupled to the ground terminal. The switch is configured to receive the drive signal and coupled to the second resistor terminal. The first diode includes a first diode terminal and a second diode terminal and coupled to the first resistor.

System and method for regulating one or more currents. The system includes a system controller, an inductor, a first resistor, a switch and a first diode. The system controller includes a first controller terminal and a ground terminal, the system controller being configured to output a drive signal at the first controller terminal. The inductor includes a first inductor terminal and a second inductor terminal, the first inductor terminal being coupled to the ground terminal, the second inductor terminal being coupled to one or more light emitting diodes. The first resistor includes a first resistor terminal and a second resistor terminal, the first resistor terminal being coupled to the ground terminal. The switch is configured to receive the drive signal and coupled to the second resistor terminal. The first diode includes a first diode terminal and a second diode terminal and coupled to the first resistor.

A linear driving system for LED with high power factor including a rectifying circuit receiving an AC voltage and generating a DC voltage to a power supply bus having a protection circuit coupled thereto. The protection circuit includes a detection unit for acquiring a voltage signal based on a power supply bus voltage, and to generate a detection result which indicates undesirable oscillation on the power supply bus voltage. A control unit includes a delay control module connected with the detection unit, and is coupled to the detection unit and for generating a control signal based on the detection result. The delay control module is for outputting a first control signal when undesirable oscillation happens, and outputting a second control signal after a protection period when undesirable oscillation disappears. A switch circuit controlled by the first control signal and the second control signal turns off for the protection period.

A linear driving system for LED with high power factor including a rectifying circuit receiving an AC voltage and generating a DC voltage to a power supply bus having a protection circuit coupled thereto. The protection circuit includes a detection unit for acquiring a voltage signal based on a power supply bus voltage, and to generate a detection result which indicates undesirable oscillation on the power supply bus voltage. A control unit includes a delay control module connected with the detection unit, and is coupled to the detection unit and for generating a control signal based on the detection result. The delay control module is for outputting a first control signal when undesirable oscillation happens, and outputting a second control signal after a protection period when undesirable oscillation disappears. A switch circuit controlled by the first control signal and the second control signal turns off for the protection period.