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.

Date of Patent:
Feb. 09, 2010

Filed:

Jun. 23, 2006
Applicants:

Shigeharu Nakao, Kyoto, JP;

Kei Nagao, Kyoto, JP;

Inventors:

Shigeharu Nakao, Kyoto, JP;

Kei Nagao, Kyoto, JP;

Assignee:

Rohm Co., Ltd., Kyoto, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G 3/32 (2006.01); H05B 41/16 (2006.01);
U.S. Cl.
CPC ...
Abstract

A counter circuit increments a count value bit by bit in synchronization with a clock pulse received from an oscillating portion. A lower order decoder receives the count value output from the counter circuit, compares a bit or bits on a lower side with a set value, and outputs an H-level only in a time period when the bit or bits match a bit pattern of set value. Similarly, an upper order decoder compares a bit or bits on an upper side with a set value, and outputs an H-level only in a time period when the bit or bits match the bit pattern of set value. An AND circuit renders a transistor conductive in a time period when both lower and upper order decoders are outputting signals of the H-level.


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