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. 13, 2021
Filed:
Nov. 25, 2015
Sony Corporation, Tokyo, JP;
Takashi Oku, Kanagawa, JP;
Katsuyuki Akutsu, Kanagawa, JP;
Akio Machida, Kanagawa, JP;
Nobuhiro Suzuki, Kanagawa, JP;
Takuji Yoshida, Kanagawa, JP;
SONY CORPORATION, Tokyo, JP;
Abstract
To provide a display device in which the brightness of the image viewed by the observer is bright, and the brightness of the image is as uniform as possible. The display device according to the present invention includes a frameand an image display device, the image display deviceincludes an image forming apparatusand an optical device, the optical deviceincludes a light guide plate, a first deflection unitconfigured with a first hologram diffraction gratingand a second hologram diffraction grating, and a second deflection unitconfigured with a third hologram diffraction grating, and slant angles and pitches of the first hologram diffraction grating, the second hologram diffraction grating, and the third hologram diffraction gratingsatisfy a predetermined relation.