Nan Chen

US Patent:

20190371989, Dec 5, 2019

Filed:

Nov 6, 2017

Appl. No.:

16/348146

Inventors:

- San Jose CA, US
Jürgen MERTENS - Wuerselen, DE
Sze Kuang LEE - Bayan Lepas, MY
Nan CHEN - Winchester MA, US

Assignee:

Lumileds LLC - San Jose CA

International Classification:

H01L 33/62
H01L 21/48
H01L 23/495
H01L 33/64

Abstract:

A method of manufacturing a lead frame, includes preparing a stamping arrangement to stamp a lead frame comprising a plurality of electrode contact regions, wherein complementary contact regions are separated by an initial gap width; and a number of connecting bars, wherein a connecting bar extends between regions of the lead frame; using the stamping arrangement to stamp the lead frame; and deforming at least one connecting bar of the stamped lead frame to reduce the gap width between complementary contact regions to a final gap width. Further described is a lead frame comprising a plurality of LED electrode contact regions, with a gap width of at most 250 μm between complementary contact regions after the deformation step. The invention further describes an LED lighting device comprising such a lead frame and at least one LED die package mounted onto complementary electrode contact regions of the lead frame.

US Patent:

20170110958, Apr 20, 2017

Filed:

Oct 20, 2015

Appl. No.:

14/918163

Inventors:

- San Diego CA, US
Yuan-cheng PAN - Saratoga CA, US
Junmou ZHANG - San Diego CA, US
Nan CHEN - San Diego CA, US
Mohamed Waleed ALLAM - San Diego CA, US

International Classification:

H02M 1/14
H02M 3/156
H02M 1/08

Abstract:

An apparatus and a method to adjust a source voltage based on an operating voltage response are provided. The apparatus includes a circuit configured to change state from a first state to a second state comprising receiving an operating voltage from a power source through a power distribution network. The apparatus further includes a sensor configured to measure an operating voltage response to the circuit changing state to receiving the operating voltage. The apparatus further includes a control circuit configured to adjust a source voltage at the power source based on the operating voltage response measured by the sensor. The method includes changing a state to receiving an operating voltage from a power source through a power distribution network, measuring an operating voltage response to the changing state to receiving the operating voltage, and adjusting the source voltage at the power source based on the measured operating voltage response.