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:
Aug. 19, 2014
Filed:
Jun. 15, 2011
Applicants:
Ching-cheng Tsai, Keelung, TW;
Cheng-hui Shen, New Taipei, TW;
Inventors:
Ching-Cheng Tsai, Keelung, TW;
Cheng-Hui Shen, New Taipei, TW;
Assignee:
Chicony Electronics Co., Ltd., New Taipei, TW;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 17/94 (2006.01); F21V 33/00 (2006.01); G09G 3/36 (2006.01); H01H 9/00 (2006.01); H01H 9/18 (2006.01); H01H 13/83 (2006.01);
U.S. Cl.
CPC ...
H01H 9/18 (2013.01); H01H 2219/044 (2013.01); H01H 2209/06 (2013.01); H01H 2209/082 (2013.01); H01H 13/83 (2013.01); H01H 2219/062 (2013.01); H01H 2211/004 (2013.01);
Abstract
A membrane circuit board and a keyboard device having the same are provided in the invention. The membrane circuit board is defined with a plurality of key regions. Each of the key regions is with a pressing region and at least one light-pervious region thereon. The membrane circuit board comprising at least two light-pervious membranes stacked with each other, and at least one light-pervious adhesive layer sandwiched between the two light-pervious membranes and at least fully filled in the light-pervious region.