Panasonic Corporation

Panasonic Semiconductor Asia Pte. Ltd.

Ulysses Ramos Lopez

Chun Kiong Leslie Khoo

Takuya Ishii

Atsushi Kitagawa

Narciso Repollo Semira

Yoshihito Kawakami

Jiong Fu

Etsuji Sato

Gin Kooi Lim

Khairullah Bin Zayadi

Teik Kai Lim

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 ON-OFF timer circuit for use in a DC-DC converter to minimize or eliminate the risk of developing sub-harmonic oscillations that may cause the dc-dc system to be unstable is presented. The apparatus controls and limits the 'On' time duration and 'Off' time duration within one pulse cycle.

On-off timer circuit for use in DC-DC converter

A method and exemplary apparatus that incorporate soft-start circuit together with adjustable output voltage control are introduced. By implementing a gradual increment of voltage steps/fast decrement, it can totally eliminate overshoot and limit in-rush current significantly at the initial startup and output voltage transition that happens after startup.

DCDC converter with soft-startup and soft-transition for adjustable output voltage

Growing community of inventors

Singapore, Singapore

Ulysses Ramos Lopez