An LED controller system includes an LED controller including an image frame buffer able to receive image data. A sensor processing module is used to receive and process sensor data and a decision module is used to determine actions taken in response to processed sensor data. An image creation module is used to create images to be sent to the image frame buffer of the LED controller.

An LED tube lamp with overvoltage protection capability is provided. The LED tube lamp includes a lamp tube, two external connection terminals, a rectifying circuit, a filtering circuit, an LED module, and a protection circuit. The protection circuit is coupled between two input terminals of the LED module and configured to perform overvoltage protection when determining that a voltage level between the two input terminals of the LED module reaches or is higher than a predefined voltage value, wherein the protection circuit includes a diode and the predefined voltage value is in a range of about 40V to about 600V.

An LED tube lamp with overvoltage protection capability is provided. The LED tube lamp includes a lamp tube, two external connection terminals, a rectifying circuit, a filtering circuit, an LED module, and a protection circuit. The protection circuit is coupled between two input terminals of the LED module and configured to perform overvoltage protection when determining that a voltage level between the two input terminals of the LED module reaches or is higher than a predefined voltage value, wherein the protection circuit includes a diode and the predefined voltage value is in a range of about 40V to about 600V.

A LED driver having a current sensing resistor arrangement with two parallel current sensing branches, each comprising at least two series resistors connected at a respective sensing node. The voltages at the two sensing nodes are processed to detect a component failure. The normal current control is based on the voltage across the overall resistor arrangement.

A load control device for controlling an amount of power delivered from an alternating-current (AC) power source to an electrical load may be configured to determine if a miswire condition exists at the load control device. For example, a control circuit of the load control device may be configured to detect a hot-to-dimmed-hot miswire condition in which a dimmed-hot terminal may be coupled to a hot side of the AC power source and a hot terminal may be coupled to the electrical load. In addition, the control circuit may be configured to detect a neutral-to-accessory-terminal miswire condition in which the hot terminal may be coupled to the hot side of the AC power source and an accessory terminal may be coupled to a neutral side of the AC power source. The control circuit may maintain a controllably conductive device non-conductive in response to determining that one of the miswire condition exists.

A vehicle lighting system includes a rotatable, depressible, rotary dimmer switch with a light emitting diode ring indicator and a vehicle lighting controller. The vehicle lighting controller controls the operation of at least a first lighting circuit and a second lighting circuit. A digital input from the rotary dimmer switch places the controller in a first configuration mode or a second configuration mode. The digital input from the rotary dimmer also switches between apply configuring the first lighting circuit or the second lighting circuit. The LED illuminates in a first color for the first circuit and a second color for the second circuit. The rotary dimmer adjusts the operating parameter and/or the overcurrent protection associated with the first lighting circuit and the second lighting circuit.

A vehicle lighting system includes a rotatable, depressible, rotary dimmer switch with a light emitting diode ring indicator and a vehicle lighting controller. The vehicle lighting controller controls the operation of at least a first lighting circuit and a second lighting circuit. A digital input from the rotary dimmer switch places the controller in a first configuration mode or a second configuration mode. The digital input from the rotary dimmer also switches between apply configuring the first lighting circuit or the second lighting circuit. The LED illuminates in a first color for the first circuit and a second color for the second circuit. The rotary dimmer adjusts the operating parameter and/or the overcurrent protection associated with the first lighting circuit and the second lighting circuit.

An LED tube lamp comprises a glass lamp tube having a main body, two end caps coupled to a respective end of the tube, an LED light strip adhered to inner circumferential surface of the tube by first adhesive, a plurality of LED light sources mounted on a mounting region, a power supply module having a circuit board and a plurality of electronic components mounted on the circuit board, a diffusion layer covering on outer surface or inner surface of the tube, and a protective layer being disposed on surface of the strip and having a plurality of first openings for disposing the plurality of LED light sources. The strip comprises the mounting region and connecting region at an end of the strip. The circuit board is substantially parallel with axial direction of the tube, electrically connects to the connecting region, and stacks with a portion of the connecting region.

An LED tube lamp comprises a glass lamp tube having a main body, two end caps coupled to a respective end of the tube, an LED light strip adhered to inner circumferential surface of the tube by first adhesive, a plurality of LED light sources mounted on a mounting region, a power supply module having a circuit board and a plurality of electronic components mounted on the circuit board, a diffusion layer covering on outer surface or inner surface of the tube, and a protective layer being disposed on surface of the strip and having a plurality of first openings for disposing the plurality of LED light sources. The strip comprises the mounting region and connecting region at an end of the strip. The circuit board is substantially parallel with axial direction of the tube, electrically connects to the connecting region, and stacks with a portion of the connecting region.

The invention relates to a method (100) for operating an isolated primary side switched converter (300) for providing a voltage supply to an LED load (401), wherein the converter comprises a galvanic isolation stage (301), the method comprising the steps of: detecting (101) a feedback signal at a primary side of the galvanic isolation stage (301), wherein the feedback signal corresponds to a secondary side voltage, determining (103) an LED supply voltage based on the feedback signal, calculating (105) a threshold value based on a constant reference voltage and an adjustment factor, wherein the adjustment factor is a dynamic factor whose absolute value increases with increasing LED current, and interrupting (107) the voltage supply to the LED load (401) if the determined LED supply voltage exceeds the threshold value.