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:
Aug. 11, 2020
Filed:
Nov. 20, 2017
Nec Corporation, Tokyo, JP;
NEC CORPORATION, Minato-ku, Tokyo, JP;
Abstract
In order to make a ghost image appearing when projection light is projected using a phase-modulating spatial light modulation element difficult to visually recognize, a projection device includes a light source, a light-source driving means, a spatial light modulation element, a modulation element control means, a projection control means, and a projection optical system, wherein the projection control means controls the light-source driving means and the modulation element control means in such a way as to cause a phase distribution of an image including a ghost compensation image and a desired image to be displayed on a display part, the ghost compensation image being an image for which high brightness is set totally and in which a display information portion to be displayed on a projection surface is bright while a ghost image portion that appears in association with the display information is dark.