Superchip Patents Power-On Reset in LED Display Chips

Superchip's patents for power-on reset in LED display chips include LED driver circuits, voltage regulators, digital control and storage circuits, power-on reset circuits, and low voltage detection circuits. The power-on reset system monitors both the external input power supply and the internal voltage regulator to avoid LED display turbulence. This is critical to ensure that the LED display initializes and operates stably and correctly at power-up, especially in large LED displays with complex multi-module splicing, to avoid display anomalies at power-up.

Superchip's patent “Power-on Reset System and Method for LED Display Chips” is granted under CN110427089B. The patent provides a power-on reset system including an LED driver circuit, a voltage regulator, a digital control and storage circuit, a power-on reset circuit and a low voltage detection circuit. The specific connections and working methods are as follows:

• Circuit connection: LED driver circuit, low-voltage detection circuit and voltage regulator work on the external input power supply VIN, the voltage regulator outputs the internal voltage regulator VLDO, and the digital control and storage circuit and power-on reset circuit work on the internal voltage regulator VLDO. the output of the low-voltage detection circuit is connected to the voltage regulator, the output of the power-on reset circuit is connected to the input of the digital control and storage circuit, and the output of the digital control and storage circuit is connected to the LED driver circuit, the low-voltage detection circuit, the low-voltage detection circuit, the voltage regulator, the power-on reset circuit, and the power-on reset circuit. The output of the digital control and storage circuit is connected to the LED driver circuit.
• Working principle and advantages: through this design, the power-on reset system can simultaneously monitor the external input power supply VIN and the internal voltage regulator VLDO. compared with the prior art power-on reset system that can only monitor a single power supply, the patent program avoids the digital control system disorder and storage circuit data loss caused by abnormal fluctuations of the external input power supply or voltage regulator, and then avoids the LED display disorder, such as “LED display disorder”. In turn, it avoids the emergence of abnormal phenomena such as LED display disorders, such as “splash screen”, improves the reliability and stability of the power-on reset of the LED display chip, and guarantees the normal display of the LED display.