US 11,927,788 B1
Light guide module including thick portion and thin portion
Chia-Ming Li, Taipei (TW); and Hui-Ling Lin, Taipei (TW)
Assigned to PRIMAX ELECTRONICS LTD., Taipei (TW)
Filed by Primax Electronics Ltd., Taipei (TW)
Filed on Apr. 7, 2023, as Appl. No. 18/132,217.
Claims priority of application No. 112109630 (TW), filed on Mar. 15, 2023.
Int. Cl. F21V 8/00 (2006.01)
CPC G02B 6/002 (2013.01) [G02B 6/0055 (2013.01); G02B 6/0073 (2013.01); G02B 6/0088 (2013.01); G02B 6/009 (2013.01); G02B 6/0091 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A light guide module, comprising:
a circuit board;
one or more light-emitting elements disposed on the circuit board;
a light guide plate located on the circuit board, wherein the light guide plate has a thick portion and a thin portion connected to the thick portion, and the thin portion is located over the one or more light-emitting elements, and a side surface of the thick portion adjacent to the thin portion is laterally adjacent to the one or more light-emitting elements, wherein a side surface of the thin portion away from the thick portion is a light-exiting surface;
a first reflective layer covering a side surface of the thick portion away from the thin portion; and
a second reflective layer covering an upper surface of the thick portion and an upper surface of the thin portion.