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:
Sep. 15, 2020
Filed:
Dec. 22, 2017
Rockwell Collins, Inc., Cedar Rapids, IA (US);
Rick J. Johnson, Shellsburg, IA (US);
Rockwell Collins, Inc., Cedar Rapids, IA (US);
Abstract
A direct-lit LED backlight for a liquid crystal display (LCD) based avionics display unit may include a two-dimensional high density array of mid-power LED units mounted to a circuit card. A diffuser layer for scattering and spreading the luminous output of the LED array throughout the full LCD stack may be airlessly adhered (e.g., without the need for an air gap) to the LED array, and to the LCD stack, by bond layers of thermally conductive transparent optical adhesive. The circuit card may include embedded resistive heaters for conductively heating the LCD stack to optimize performance, or the LCD stack may be heated by the LED array itself. The backlight may include night vision filtering layers similarly and airlessly adhered between the LED array and the LCD stack by the optical bond layers.