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. 31, 2018
Filed:
Jul. 28, 2016
Young Lighting Technology Inc., Hsin-Chu, TW;
Chien-Hui Lee, Hsin-Chu, TW;
Ching-Hsiang Li, Hsin-Chu, TW;
Chin-Ku Liu, Hsin-Chu, TW;
Jhong-Hao Wu, Hsin-Chu, TW;
YOUNG LIGHTING TECHNOLOGY INC., Hsin-chu, TW;
Abstract
A backlight module includes a first surface light source assembly, a second surface light source assembly disposed above the first surface light source assembly, a first optical film disposed above the second surface light source assembly and including a plurality of prisms arranged along a first direction, and a light filter element disposed between the first and second surface light source assemblies. Both of the first surface light source assembly and the second surface light source assembly include a light emitting unit and a light guide plate. Each prism has a tip end facing the second surface light source assembly. The light filter element is configured to allow an incident light ray within a predetermined range of incident angle to pass therethrough. The backlight module can be switched between a narrow viewing angle mode and a wide viewing angle mode. Related driving method and display apparatus are also provided.