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:
Nov. 26, 2019
Filed:
Jul. 09, 2014
Ming-tsun Lin, Hsin-Chu, TW;
Hao-chang Tsao, Hsin-Chu, TW;
Ming-Tsun Lin, Hsin-Chu, TW;
Hao-Chang Tsao, Hsin-Chu, TW;
CORETRONIC CORPORATION, Hsin-Chu, TW;
Abstract
A projection device and a luminance control method of a frame are provided. The luminance control method of the frame includes the following steps. Whether the frame is a dark-like frame or not is determined according to a gray level distribution of the frame and whether at least one sub-frame of the frame is a dark-like sub-frame or not is determined according to a gray level distribution of the sub-frame. When the frame is the dark-like frame and the sub-frame is not the dark-like sub-frame, a corresponding area of the sub-frame is ignored and a reference value of luminance is computed according to a part corresponding to the unignored area in the frame. The luminance of a projection light of the projection device is adjusted according to the reference value of luminance.