Patent ID: 11914832
Assignee: TONG LUNG METAL INDUSTRY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A membrane touch panel device comprising:
a circuit board unit, an opaque light-blocking frame plate, a plurality of opaque light-blocking tabs, and an operation panel unit that are stacked along a front-rear direction;
wherein said circuit board unit includes a circuit board having a plurality of keypad circuits that are disposed on a front side of said circuit board, and a plurality of LEDs being electrically connected to said front side of said circuit board;
wherein said light-blocking frame plate is stacked on said front side of said circuit board, and defines a hollow section provided for said LEDs to protrude forwardly thereinto;
wherein said light-blocking tabs are connected to a front side of said light-blocking frame plate such that said light-blocking tabs respectively cover said LEDs;
wherein said operation panel unit is fixedly stacked on said front side of said light-blocking frame plate, and has a plurality of key segments that are respectively aligned with said keypad circuits along the front-rear direction, and that are adapted to permit light generated by said LEDs and emitted through said hollow section to pass forwardly therethrough; and
wherein said circuit board further has a main panel that is provided with said keypad circuits, two first light-blocking paint layers that are respectively coated on front and rear sides of said main panel, and a second light-blocking paint layer that is opaque and that is coated on a peripheral edge of said main panel connecting between said front and rear sides of said main panel.