US 12,216,305 B2
Terminals engaged light guide plate and front light module thereof
Jin-Wei Tong, Taoyuan (TW); Hao Lu, Taoyuan (TW); Fan-Wei Wu, Taoyuan (TW); and Wei-Lun Huang, Taoyuan (TW)
Assigned to GLOBAL LIGHTING TECHNOLOGY INC., Taoyuan (TW)
Filed by GLOBAL LIGHTING TECHNOLOGY INC., Taoyuan (TW)
Filed on Jun. 8, 2023, as Appl. No. 18/207,157.
Claims priority of application No. 111134540 (TW), filed on Sep. 13, 2022.
Prior Publication US 2024/0085611 A1, Mar. 14, 2024
Int. Cl. F21V 8/00 (2006.01); G06F 3/041 (2006.01)
CPC G02B 6/0028 (2013.01) [G02B 6/0031 (2013.01); G02B 6/0073 (2013.01); G06F 3/0412 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A front light module, installed on a touch circuit substrate, comprising:
a first light guide sheet, laid on the touch circuit substrate, and having a first light receiving lateral, a first light receiving lateral having a plurality of first taper sets formed by protruding from an edge of the first light receiving lateral, and a first pattern area defined on a surface of the first light guide sheet;
a second light guide sheet, superimposed on the first light guide sheet, and having a second light receiving lateral, the second light receiving lateral having a plurality of second taper sets formed by protruding from an edge of the second light receiving lateral, an incident plane formed by engaging the second taper sets with the first taper sets, and a second pattern area defined on a surface of the second light guide sheet; and
a light bar, formed by arranging an odd-positioned light source group and an even-positioned light source group for providing light toward the incident plane, the odd-positioned light source group being configured to be corresponsive to the first taper sets, and the even-positioned light source group being configured to be corresponsive to the second taper sets,
wherein, when the odd-positioned light source group functions, the first pattern area is lit by light from the first taper sets, and when the even-positioned light source group functions, the second pattern area is lit by light from the second taper sets, and
the first light guide sheet and the second light guide sheet are formed by bending a sheet body, the sheet body has a fold line, the first pattern area and the second pattern area are located on two sides of the fold line respectively, the first light receiving lateral and the second light receiving lateral are located on two opposite sides of the fold line respectively, and the fold line is perpendicular to the first light receiving lateral and the second light receiving lateral.