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:
Sep. 22, 2020
Filed:
May. 16, 2018
Sharp Kabushiki Kaisha, Osaka, JP;
Nathan James Smith, Oxford, GB;
Andrew Acreman, Oxford, GB;
Hywel Hopkin, Oxford, GB;
Takehiro Murao, Osaka, JP;
Jiyun Yu, Oxford, GB;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A switchable view angle control device for a privacy view display system includes an electrically switchable view angle control LCD that is operable in a first state and a second state; a front polarizer located on a viewing side of the switchable view angle control LCD; and a polarized light source located on a non-viewing side of the switchable view angle control LCD that emits polarized light. When the switchable view angle control LCD in the first state, the view angle control device operates in a narrow angle view mode in which off-axis polarized light from the polarized light source is changed by the switchable view angle control LCD so that the off-axis light is absorbed by the front polarizer, and on-axis light passes through the switchable view angle control LCD and the front polarizer. When the switchable view angle control LCD is in the second state, the view angle control device operates in a wide angle view mode in which the polarized light from the polarized light source is scattered by the switchable view angle control LCD and passes through the front polarizer.