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:
Feb. 02, 2021
Filed:
Dec. 10, 2018
Tianma Japan, Ltd., Kanagawa, JP;
TIANMA JAPAN, LTD., Kanagawa, unknown;
Abstract
A light beam direction control device is provided with a transparent substrates in which main surfaces of the transparent substrate are opposed to each other, transparent conductive films respectively disposed on the main surface side of the transparent substrate, electrodes electrically connected to the transparent conductive films, a control circuit for controlling a potential difference between the transparent conductive films and a plurality of light beam transmitting regions arranged on the transparent substrates, light beam absorbing regions disposed between the adjacent light beam transmitting regions, and the transparent conductive films. When shifting the range of outgoing direction of light beam to a narrow state, the control circuit applies the electrodes electrically open and holds the open state.