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:
Jan. 19, 2021
Filed:
Dec. 20, 2018
Ushio Lighting, Inc., Tokyo, JP;
Takehiko Maeda, Tokyo, JP;
Ushio Lighting, Inc., Tokyo, JP;
Abstract
A light projection device includes a tubular casing having a light-emitting part at one tube end; a light source configured with a light-emitting diode; and a light amount control mechanism positioned between the light source and the light-emitting part. The light amount control mechanism includes a rotating body, an operating part attached to the rotating body such as to allow for rotary operation of the rotating body from outside the casing, a variable resistor, and a link mechanism operably connecting the rotating body and the variable resistor such that a forward movement of the rotating body causes a movable part of the variable resistor to move in a direction in which the amount of current is increased and such that a backward movement of the rotating body causes the movable part of the variable resistor to move in a direction in which the amount of current is decreased.