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:
Oct. 13, 2015
Filed:
Sep. 12, 2011
Cheng Chen, Cupertino, CA (US);
Siddharth Mohapatra, Santa Clara, CA (US);
Lili Huang, San Jose, CA (US);
John Z. Zhong, Cupertino, CA (US);
Masato Kuwabara, Tsukuba, JP;
Cheng Chen, Cupertino, CA (US);
Siddharth Mohapatra, Santa Clara, CA (US);
Lili Huang, San Jose, CA (US);
John Z. Zhong, Cupertino, CA (US);
Masato Kuwabara, Tsukuba, JP;
Apple Inc., Cupertino, CA (US);
Abstract
When a user operates a touch sensor panel having an LCD device outdoors or in a bright environment, light reflecting off the device can create glare. In order to reduce glare, a user can view the device through polarized filters such as polarized sunglasses. Doing so can reduce the visibility of the image displayed on the LCD. A quarter-wave retardation film can be added to the touch sensor panel's LCD device to mitigate these effects by producing circularly polarized light. However, adding a separate quarter-wave retardation film can increase the thickness and cost of manufacturing the touch sensor panel. Embodiments of the present disclosure are directed to a touch sensor panel constructed from a base film having quarter-wave retardation properties that can produce circularly polarized light. Because the base film has the desired optical properties, a separate quarter-wave retardation film may not be needed.