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:
Jul. 14, 2015
Filed:
May. 06, 2013
Apple Inc., Cupertino, CA (US);
Yi Huang, Santa Clara, CA (US);
Pongpinit Towashiraporn, Cupertino, CA (US);
Erik A. Zweigle, San Jose, CA (US);
Mingxia Gu, San Jose, CA (US);
Wei Chen, Palo Alto, CA (US);
Cheng Chen, San Jose, CA (US);
Young Cheol Yang, Sunnyvale, CA (US);
Isaac V. Kauvar, Denver, CO (US);
Apple Inc., Cupertino, CA (US);
Abstract
A display is provided that has upper and lower polarizers, a color filter layer, a liquid crystal layer, and a thin-film transistor layer. The color filter layer and thin-film transistor layer may be formed from materials such as glass that are subject to stress-induced birefringence. To reduce light leakage that reduces display performance, one or more birefringence compensation layers may be incorporated into the display to help compensate for any birefringence effects. The compensation layers may include a birefringence compensation layer attached to the color filter layer or the thin-film transistor layer. A display may include an upper compensation layer attached to the color filter layer and a lower compensation layer attached to the thin-film transistor layer. The compensation layer may be formed from glass or polymer materials that have a negative photo-elastic constant.