US 11,656,713 B2
Touch indicating cover and electronic device using the same
Yu-Jen Lai, Hsinchu County (TW); and Yi-Feng Chen, Hsinchu County (TW)
Assigned to DARWIN PRECISIONS CORPORATION, Hsinchu County (TW)
Filed by Darwin Precisions Corporation, Hsinchu County (TW)
Filed on Nov. 24, 2021, as Appl. No. 17/534,471.
Claims priority of application No. 110111677 (TW), filed on Mar. 30, 2021.
Prior Publication US 2022/0317799 A1, Oct. 6, 2022
Int. Cl. G06F 3/041 (2006.01); G06F 1/16 (2006.01); H03K 17/96 (2006.01)
CPC G06F 3/0416 (2013.01) [G06F 1/1643 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A touch indicating cover, comprising:
a light-guide plastic piece having a first surface and a second surface opposite to each other, wherein the second surface of the light-guide plastic piece comprises a plurality of microstructures;
a printed circuit layer disposed on the first surface of the light-guide plastic piece;
an ink layer disposed on the printed circuit layer and the first surface of the light-guide plastic piece, wherein the ink layer comprises a light-emitting pattern region corresponding to the microstructures;
a passivation film disposed on the ink layer; and
a light-emitting component embedded in the first surface of the light-guide plastic piece and connected to the printed circuit layer, wherein the light-emitting component is disposed adjacent the light-emitting pattern region,
wherein the printed circuit layer comprises a touch sensing pattern surrounding the light-emitting pattern region, the light-emitting component is disposed at a side of the touch sensing pattern, and a minimum distance between the touch sensing pattern and the light-emitting component ranges from 1.5 mm to 10 mm.