US 12,395,172 B2
Touch input device
Chao-Yu Chen, Taoyuan (TW)
Assigned to DARFON ELECTRONICS CORP., Taoyuan (TW)
Filed by Darfon Electronics Corp., Taoyuan (TW)
Filed on May 22, 2024, as Appl. No. 18/670,812.
Claims priority of provisional application 63/472,823, filed on Jun. 14, 2023.
Claims priority of application No. 113100307 (TW), filed on Jan. 3, 2024.
Prior Publication US 2024/0421818 A1, Dec. 19, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H03K 17/96 (2006.01); G06F 3/02 (2006.01)
CPC H03K 17/9629 (2013.01) [H03K 17/9631 (2013.01); H03K 17/9638 (2013.01); G06F 3/021 (2013.01); H03K 2217/96042 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A touch input device, comprising:
a circuit board having an upper surface, a lower surface, and a board edge, the upper surface having a plurality of sensing regions arranged along a long axis direction;
a plurality of illuminant elements disposed on the upper surface of the circuit board and arranged along the long axis direction;
a spacer disposed over the upper surface of the circuit board, the spacer having a top surface, a bottom surface, and a light-leaking edge, the spacer having a plurality of accommodation holes penetrating through the top surface and the bottom surface and respectively corresponding to the plurality of sensing regions, the light-leaking edge corresponding to the board edge of the circuit board, wherein the plurality of illuminant elements extend into the plurality of accommodation holes, respectively;
a plurality of light guide plates disposed in the plurality of accommodation holes, respectively;
a shielding sheet comprising a main section, a first extension section, and a second extension section, the main section covering the top surface of the spacer and having a plurality of light permeable regions, the light permeable regions arranged along the long axis direction and respectively corresponding to the plurality of light guide plates, the first extension section covering the light-leaking edge of the spacer and the board edge of the circuit board, the second extension section connected to the first extension section and combined with the lower surface of the circuit board; and
a top plate disposed on the main section of the shielding sheet, the top plate having a plurality of light-exit regions arranged along the long axis direction and respectively corresponding to the plurality of light permeable regions of the main section of the shielding sheet.