Led power supply control system
AssigneeJiangmen Qinjian Semiconductor Technology Co., Ltd
InventorZhaowei Zhen
Life of this patent
Estimating the term…
Abstract
An LED power supply control system includes a plurality of LED power supply control apparatuses. Each LED power supply control apparatus includes a switch module, a power processing module, a main power supply module, and a control module. The plurality of LED power supply control apparatuses are grouped and each group is configured with a same cyclic bit period and a same online bit period that differs from online bit periods of other groups, to control the switch module during both a startup mode and an operation mode and enable the control module to switch between power supply from the main power supply module and power supply from the external input power.
Claims20
An LED power supply control system, comprising:
- a plurality of LED power supply control apparatuses, wherein each of the LED power supply control apparatuses comprises a switch module, a power processing module, a main power supply module, and a control module;
- the main power supply module comprises a charging module;
- and
- each of the LED power supply control apparatuses is configured to:
- during a startup mode, control the corresponding switch module to be in an online state, process received external input power through the corresponding power processing module, and use the processed external input power to supply power to the corresponding control module, to start the corresponding control module;
- count, through the started control module, bit periods of a first control signal received by the respective control module, and generate, through the respective control module based on the counted bit periods, a second control signal for enabling control of the corresponding switch modules group-by-group to actuate, such that the corresponding external input power meets a voltage threshold and a current threshold required for driving an LED to operate, thereby entering an operation mode;
- and
- during the operation mode, control, through the respective control module and based on the second control signal, the corresponding switch module to actuate, such that the corresponding control module switches between different power supply modes, wherein the power supply modes comprise power supply from the charging module and power supply from the external input power.
Dependencies are inferred from the claim text.