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:
Jun. 29, 2021
Filed:
Sep. 16, 2019
Sharp Kabushiki Kaisha, Osaka, JP;
Takashi Satoh, Sakai, JP;
SHARP KABUSHIKI KAISHA, Sakai, JP;
Abstract
A reflective-type liquid crystal display device includes: a first substrate including a light-reflective first electrode; a second substrate including a light-transmissive second electrode; a liquid crystal layer that is provided between the first electrode and the second electrode and takes a generally vertical alignment during black display; a polarizing layer provided on a viewer side of the second substrate; and a first retardation layer, a second retardation layer and a third retardation layer that are arranged in this order from a side of the polarizing layer, wherein 40°≤|θ3−2×θ2+2×θ1|≤50°, 130°≤|θ3−2×θ2+2×θ1|≤140°, 220°≤|θ3−2×θ2+2×θ1|≤230° or 310°≤|θ3−2×θ2+2×θ1|≤320° is satisfied, where θ1 denotes an angle formed between an absorption axis or a transmission axis of the polarizing layer and a slow axis of the first retardation layer, θ2 an angle formed between the absorption axis or the transmission axis of the polarizing layer and the slow axis of second retardation layer, and θ3 an angle formed between the absorption axis or the transmission axis of the polarizing layer and the slow axis of the third retardation layer.