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:
Apr. 07, 2020
Filed:
Apr. 04, 2019
Lg Electronics Inc., Seoul, KR;
LG ELECTRONICS INC., Seoul, KR;
Abstract
A refrigerator may include a first door having a first opening and a second door to open and close the first opening. The second door may include a door frame with a second opening and a panel assembly provided at the second opening. The panel assembly may include a front panel, and insulation panel, and a spacer. The door frame may include a recess to receive a knock detection device at a rear side of the front panel, which may detect a user's knocking operation on the panel assembly to turn on a lighting unit to allow the inside of the refrigerator to be seen through the panel assembly. The door frame may also include at least one injection port to inject a foaming solution for molding an insulation provided in an insulation space defined by the door frame and the panel assembly.