Abstract: ABSTRACT A power compensation method for a serial connection color-blending LED string with power line communication is provided. An opening duration of each driving channel of the LED driver is continuous and non-overlapping while turning on to generate currents. With the LED packages connected in series, after the LED driver turns on the third driving channel during the third opening duration, the LED driver turns on a compensation channel to generate a compensation current to compensate a following LED package for maintaining a driving current, and to provide the same power to each LED package.

Abstract: A replaceable bulb lamp LED string device includes a bulb lamp LED string, a main memory, and a main controller. The main controller periodically detects a total power consumption value of the bulb lamp LED string. When the main controller determines that a variation of the total power consumption values between two adjacent periods of the bulb lamp LED string increases more than a standby power consumption threshold, the main controller executes a new address searching mode to detect an address of a bulb lamp LED installed in the bulb lamp LED string. The main controller further sequentially records the detected address into an address table stored in the main memory. Since the main controller can detect the address of the bulb lamp LED, a user can easily fix the replaceable bulb lamp LED string device without finding a vendor of the replaceable bulb lamp LED string device.

Abstract: An LED string light controlling method using the PLC is executed by an LED string light using the PLC. The LED string light using the PLC is driven by a time-sharing technique. When a controller unit transmits data segments to an LED unit, an LED module of the LED unit is turned off, such that a current flowing through the LED module can be decreased. Namely, a power line for connecting the LED unit is an unloaded power line, and the data segments can be correctly transmitted. Moreover, an impact of data deformation or distortion caused by a current for driving the LED module can also be minimized. Therefore, a limitation of a transmission distance caused by the PLC can be improved, or an amount of the at least one LED module can be increased.

Abstract: A surface mounted Light Emitting Diode (LED) device includes a printed circuit board (PCB), at least one color LED chip mounted on the PCB, and a driving chip. The driving chip is mounted on the PCB and electrically connected to the at least one color LED chip to drive the at least one color LED chip. The driving chip has a signal input port and a signal output port. The signal input port is electrically connected to a signal input conductive pad, and the signal output port is electrically connected to a signal output conductive pad. The surface mounted LED device further includes a gap located between the signal input conductive pad and the signal output conductive pad for creating a space for a cutting apparatus to sever any conductive line through the gap, and making a manufacturing procedure of the surface mounted LED device easier.

Abstract: A power line communication sender generates a command signal that comprises a series of alternate first level voltage signals and second level voltage signals, while the time periods of each first level voltage signal and each second level voltage signal are determined according to the value of each corresponding bit in a command information. A power line communication receiver is connected to the sender through power lines to receive power and command signals. When the receiver receives the command signal, the time periods of each first level voltage signal and second level voltage signal is calculated to record each bits of the command signal. Since the information is carried in every first level voltage signal and second level voltage signal, it requires only half the time and requires no quick switching in every binary bit of the transmitted signal, therefore efficiency is improved and signal distortion is lowered.

Abstract: A power line communication sender generates a command signal that comprises a series of alternate first level voltage signals and second level voltage signals, while the time periods of each first level voltage signal and each second level voltage signal are determined according to the value of each corresponding bit in a command information. A power line communication receiver is connected to the sender through power lines to receive power and command signals. When the receiver receives the command signal, the time periods of each first level voltage signal and second level voltage signal is calculated to record each bits of the command signal. Since the information is carried in every first level voltage signal and second level voltage signal, it requires only half the time and requires no quick switching in every binary bit of the transmitted signal, therefore efficiency is improved and signal distortion is lowered.

Abstract: The LED lighting system includes a plurality of LED devices and a main controller, the LED devices are connected in parallel, and are connected to the main controller. The main controller includes a main processing unit. The main processing unit determines whether a total consumption of the LED devices increases by a first predetermined value; when the total consumption increases by the first predetermined value, the main processing unit generates an address writing signal, and sends the address writing signal to the LED devices. Only the LED device with an empty LED memory unit, which is the newly installed LED device, will store an address code according to the address writing signal. Since the address code is given to the new LED device automatically by the main processing unit, the user can independently install a new LED device to the LED lighting system without professional help.

Abstract: An address detective method is executed by a parallel connection LED lighting system, and the parallel connection LED lighting system includes a plurality of the LED devices and a main controller. The main controller generates a testing signal to determine whether the LED devices are abnormal. The main controller further generates a reminder signal to remind a user where an abnormal LED device is. Then, the main controller replaces the address code in an address table which corresponds to the abnormal LED device with the address code of a new LED device. Therefore, the parallel connection LED lighting system can still control each of the LED devices to display a plurality of frames for showing dynamic lighting effects according to the address table. Namely, the user can easily fix the parallel connection LED lighting system.

Abstract: The present invention discloses a lighting string device, lighting string location identifying system, and lighting string location identifying method thereof. The aforementioned lighting string device includes a lighting string controller and a plurality of lighting units. Each one of the plurality of lighting units includes a lighting portion and a controlling chip. The driving end of the controlling chip is connected to the lighting portion, and the controlling end and power end of the controlling chip is connected to the lighting string controller through the power line. When the controlling chip acquired controlling command information transmitted by the lighting string controller through the power line, the controlling chip compares the controlling command information and the address code, and determines whether to drive the lighting portion or not according to the comparison result.