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. 09, 2018
Filed:
Jan. 11, 2013
Applicant:
Multitouch Oy, Helsinki, FI;
Inventors:
Tommi Ilmonen, Espoo, FI;
Heikki Hyvärinen, Kuopio, FI;
Assignee:
Multitaction Oy, Helsinki, FI;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V 7/04 (2006.01); F21V 8/00 (2006.01); G02F 1/1335 (2006.01); G06F 3/042 (2006.01);
U.S. Cl.
CPC ...
G02B 6/0016 (2013.01); G02B 6/0036 (2013.01); G02B 6/0051 (2013.01); G02B 6/0053 (2013.01); G02B 6/0055 (2013.01); G02B 6/0068 (2013.01); G02F 1/133524 (2013.01); G02F 1/133603 (2013.01); G02F 1/133605 (2013.01); G02F 1/133606 (2013.01); G02F 1/133611 (2013.01); G06F 3/0421 (2013.01); G02F 1/133604 (2013.01); G02F 2001/133607 (2013.01);
Abstract
A rear illuminated light guide for an LCD screen with in-coupling gratings to receive backlight from an input surface and to spread received backlight laterally within the light guide. Out-coupling gratings receive laterally spread backlight and output at least some of the received laterally spread backlight through an output surface that is opposite to the input surface and towards the LCD screen. The input and output gratings have lateral offset.