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. 24, 2018
Filed:
Nov. 28, 2013
Mitsubishi Electric Corporation, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
Provided is a display device that includes an LED board on which a plurality of LED chips arranged in a matrix shape are mounted and an LED cover that covers a surface of the LED board where the LED chips is mounted and that is applied, as an LED display unit displaying a state of operation, for an electronic device, wherein the LED cover includes a front surface portion with a back surface arranged to face the LED chips, the back surface having grid-shaped ribs projected to form a plurality of recessed light guide holes at locations corresponding to the LED chips and characters printed on a front surface of the front surface portion adjacent to locations corresponding to bottom surfaces of the light guide holes, wherein each of the light guide holes is a tapered hole of which opening area is decreased toward the bottom surface, and the bottom surfaces are satin finished.