Donald Y Lam

Address:

1327 Bentley Ct, West Covina, CA 91791

VIN:

4JGBF71E77A230127

Make:

MERCEDES-BENZ

Model:

GL-CLASS

Year:

2007

US Patent:

7148658, Dec 12, 2006

Filed:

Feb 5, 2004

Appl. No.:

10/772714

Inventors:

Donald Cho Lam Yu - Anaheim CA, US

Assignee:

Yobon Technologies, Inc. - Taipei County

International Classification:

H02J 7/16

US Classification:

320166, 320320, 320167

Abstract:

A method for charge control of a photoflash capacitor. The method includes detecting a voltage on the photoflash capacitor, asserting and then latching a recharge signal when the detected voltage is lower than a first reference voltage, de-asserting and then latching the recharge signal when the detected voltage exceeds a second reference voltage, charging the photoflash capacitor when the recharge signal is asserted, and providing a pin for connection of a resistive element which determines the first reference voltage.

US Patent:

6956358, Oct 18, 2005

Filed:

Feb 5, 2004

Appl. No.:

10/772728

Inventors:

Donald Cho Lam Yu - Anaheim CA, US

Assignee:

Yobon Technologies, Inc. - Sindian

International Classification:

H01M010/44
H01M010/46

US Classification:

320166

Abstract:

A method for charge control of a photoflash capacitor. The method includes generating an input current to induce a charge current for the photoflash capacitor when an activation signal is asserted, detecting a first voltage from the photoflash capacitor and a second voltage corresponding to the input current, asserting and de-asserting a recharge signal respectively when the first detected voltage is lower and higher than a first reference voltage, asserting and de-asserting a current limit signal respectively when the second detected voltage is higher and lower than a second reference voltage, asserting the activation signal only when the recharge signal is asserted and the current limit signal is de-asserted, and providing a pin for connection of a resistive element which determines the second reference voltage.