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:
Feb. 01, 2011
Filed:
Mar. 22, 2007
Katsuhiko Morishita, Matsusaka, JP;
Tsuyoshi Okazaki, Nara, JP;
Takehiko Sakai, Matsusaka, JP;
Yoshiharu Kataoka, Tsu, JP;
Chikanori Tsukamura, Tsu, JP;
Dai Chiba, Matsusaka, JP;
Katsuhiko Morishita, Matsusaka, JP;
Tsuyoshi Okazaki, Nara, JP;
Takehiko Sakai, Matsusaka, JP;
Yoshiharu Kataoka, Tsu, JP;
Chikanori Tsukamura, Tsu, JP;
Dai Chiba, Matsusaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A liquid crystal display device () of the present invention includes a backlight (), a display liquid crystal panel () and a viewing angle control panel () for switching a viewing angle of the display liquid crystal panel () between a wide viewing angle mode and a narrow viewing angle mode. The viewing angle control panel () includes a control panel upper polarizing plate (), a liquid crystal cell () and a control panel lower polarizing plate () stacked in this order, and phase difference plates () are provided between the polarizing plates () and the liquid crystal cell (), respectively. The viewing angle control panel () is arranged such that Rein a white display portion in the wide viewing angle mode is nλ/2 (n is an integer of 1 or more), Rein a white display portion in the narrow viewing angle mode is nλ/2 (n is an integer of 1 or more), and Rein a black display portion in the narrow viewing angle mode is nλ (n is an integer of 1 or more).