Panasonic Corporation

Panasonic Semiconductor Asia Pte. Ltd.

Jiong Fu

Chun Kiong Leslie Khoo

Etsuji Sato

Atsushi Kitagawa

Wee Sien Hong

Narciso Repollo Semira

Yoshihito Kawakami

Ulysses Ramos Lopez

Shuang Zhang

Muhammad S/o Abuturab

Maung Zabu Ko

Andi Soemarli Rasak Lie

LED drivers specially directed to LED matrix driver's ghost image prevention is disclosed. The LED driver receives an external input and decodes the input to produce a time multiplex timing on turning on an LED array. The LED driver inserts a dead time to the outputs and during this time the ghost image prevention circuit discharges the output stray capacitances to a predetermined level.

LED matrix driver ghost image prevention apparatus and method

An apparatus to detect faulty connection of LED (open/short conditions) which may affect the function of LED display panel is presented. The apparatus basically controls the switches through control algorithm circuit to get the information of LED driver output pins voltage and compare them with two reference voltages to determine the open/short condition of individual LED.

LED matrix open/short detection apparatus and method

A protection circuit for protecting DCDC converter with a power MOS transistor from start-up in-rush current includes a coupling capacitor and a voltage clamping circuit. By using the coupling capacitor to turn-off the power MOS transistor, there is no current consumed during the normal operation of the circuit. Enable signal or leakage current circuit is used to discharge the capacitor so that the circuitry can work in another turning-on of power supply.

Start-up in-rush current protection circuit for DCDC converter

Growing community of inventors

Singapore, Singapore

Jiong Fu