A linear regulator (40) supplies a first drive current (I1) to a first light source (24) in a first period in which the first light source (24) is turned on and a second light source (25) is not turned on, and in a second period in which the first light source (24) and the second light source (25) are turned on, and stops the supply of the first drive current (I1) in a third period in which the first light source (24) and the second light source (25) are turned off. A switching regulator (41) supplies a second drive current (I2) to the second light source (25) in the second period, and stops the supply of the second drive current (I2) in the third period.

An outer rearview mirror and side turning lamp structure of automobile with flow lamp function including a light source of side turning lamp, a light source of flow lamp and a power drive assembly, the light source of side turning lamp and light source of flow lamp both connect with the power drive assembly, and the power drive assembly having a power circuit module, a control circuit module, a drive circuit module of side turning lamp and a drive circuit module of flow lamp, and the power circuit module simultaneously connects with the drive circuit module of side turning lamp and drive circuit module of flow lamp by the control circuit module. The outer rearview mirror and side turning lamp structure of automobile added the flow lamp function, and different degrees of brightness change of the light source, and the control methods of the side turning lamp with flow lamp.

An outer rearview mirror and side turning lamp structure of automobile with flow lamp function including a light source of side turning lamp, a light source of flow lamp and a power drive assembly, the light source of side turning lamp and light source of flow lamp both connect with the power drive assembly, and the power drive assembly having a power circuit module, a control circuit module, a drive circuit module of side turning lamp and a drive circuit module of flow lamp, and the power circuit module simultaneously connects with the drive circuit module of side turning lamp and drive circuit module of flow lamp by the control circuit module. The outer rearview mirror and side turning lamp structure of automobile added the flow lamp function, and different degrees of brightness change of the light source, and the control methods of the side turning lamp with flow lamp.

A system for detecting anomalies in electrical wiring in a truck trailer. The system measures and compares current drawn from the truck tractor with the current drawn by a circuit at a particular trailer component or other location in the trailer wiring. If the two current measurements differ in excess of a predetermined threshold, the system can report a wiring anomaly. The location of the anomaly can then be determined by performing the operation for different trailer components thus testing multiple different branches of the trailer power distribution circuit, and using the results of these tests to determine that an anomaly is present, and possibly the location of the issue. The system may then send a notification to a remote computing device, to the truck tractor, or any combination thereof.

An adaptor for connecting an LED lighting unit to a vehicle CAN-bus. The adaptor has a connector connectable to a corresponding connector on a vehicle, to receive a lighting current from the CAN-bus of the vehicle. A wireless power transmitter of the adaptor wirelessly transmits power to the LED lighting unit at a first level, typically suited to LED operation. The adaptor further includes one or more resistors connected between the connector and transmitter and arranged to draw power from the connector at a second power level higher than the first power level, which second power level is suitably equivalent to that for halogen or filament lighting.

The present invention relates to a system, device, and method for checking functionality of tail lights, brake lights, and turn lights of a vehicle and/or a connected trailer. The invention includes a key fob device that wirelessly connects with a vehicle's on-board light control module (i.e. ECU). The key fob can be used from outside of the vehicle to transmit wireless instructions to flash or actuate tail lights, brake lights, and turn lights for a predetermined time enabling a user standing behind the vehicle to check the functionality of the lights of the vehicle. The user can activate control buttons on the key fob to selectively activate tail lights, brake lights, and turn lights. The present invention eliminates the need to ask for assistance to check functionality of vehicle lights or spend time getting in and out of a truck cab to check the lights while alone.

A method comprising optically detecting optical output states of a plurality of light sources of an optical device over a test interval; for each light source, optically detecting that the output state of the light source has changed from a first optical condition to a second optical condition; for each light source, optically detecting that the output state of the light source has changed from the second optical condition to a third optical condition; for each light source, determining a first time interval representative of the first optical condition; for each light source, determining a second time interval representative of the second optical condition; for each light source, determining a third time interval representative of the third optical condition; determining a test result for the device based on a comparison of the first, second and third time intervals with pre-stored time intervals.

A lamp for a vehicle includes a lamp unit including a plurality of light emitting areas arranged in a direction; a mode determination unit configured to determine a selected light emitting mode among a plurality of light emitting modes of the lamp unit; and a control unit configured to cause at least one of the plurality of light emitting areas to generate light having a first color or a second color based on the determined light emitting mode. In particular, the plurality of light emitting modes comprises: a first light emitting mode in which the light of the first color is generated from the plurality of light emitting areas; and a second light emitting mode in which the light generated from each of the plurality of light emitting areas is changed from the first color to the second color sequentially.

A multi-function vehicle lamp having a plurality of light emitting diodes includes a turn input and a tail input with a switch configured to stop current flowing through the tail input when the turn input is energized to increase current flow through the turn input to satisfy minimum current draw requirements of a vehicle current meter that detects turn indicator failure. The lamp may include a single combined turn/stop input, or may include separate turn and stop inputs. Lamps having separate turn and stop inputs block current flow through the stop input when the turn input is energized.

A towing vehicle includes a towing control unit with circuitry to detect whether a light is connected to the electrical harness electrically coupling the vehicle to the trailer. The towing control unit may include lamp connectivity circuits for, for example, the left turn signal and the right turn signal. To determine whether the turn light is connected, the corresponding connectivity circuit periodically generates a test signal. Based on characteristics of a response signal to the test signal. The connectivity circuit determines whether the corresponding turn signal light of the trailer is connected based on a response to the test signal. The connectivity circuit may distinguished whether an incandescent-based turn signal light, a light emitting diode (LED)-based turn signal light, and an open circuit is sensed based on the characteristics of the response signal.