The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 01, 2013
Filed:
Jan. 19, 2010
Applicant:
Chin-chung Cheng, Hsinchu, TW;
Inventor:
Chin-Chung Cheng, Hsinchu, TW;
Assignee:
Macroblock, Inc., Hsinchu, TW;
Primary Examiner:
Int. Cl.
CPC ...
H05B 37/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A fixed frequency dimming method and fixed frequency dimming circuit for a light emitting module can control light emitting brightness of the light emitting module through a hysteresis control circuit. A voltage difference between an upper limit voltage and a lower limit voltage of a hysteresis width of the hysteresis control circuit is maintained at a fixed value, and a driving current flowing through the light emitting module is changed by changing the upper limit voltage or the lower limit voltage.