What is LED membrane Control Panel(membrane switch keypad)?

A multi layer touch panel membrane switch assembly for particular application as a membrane control panel for Industrial?Equipment and Medical Equipment,The front panel is a smooth surface or matt surface with no exposed area causing metalic?surfaces to momentarily make contact, lighting a LED indicator located behind transparent areas in the membrane panel,A?membrane keypads having the desired flexibility and having excellent memory characteristics is used to transfer the pressure to?close the electrical comtacts,The front panel and membrane switches may be inexpensively manufactured using printed circuit?techniques and flow soldering operations.

What is membrane Control Panel claimed is:

1,A pressure sensitive membrane switch assembly in combination with a membrane control panel comprising:

A,a printed circuit having a discontinuous grid pattern thereon

B,an apertured insulator having apertures positioned over said grid.

C,an insulator having conductive areas on one side thereof,said areas being positinoned over the afore mentioned apertures.

D,an apertured shroud having the apertures positioned over said conductive areas.

E,flexble membrane keypad located in the shroud apertures and in proximity with the other side of said second insulator?contiguous to said conductive areas.

F,light emitting means mounted on said printed circuit and located adjacent said shroud aperture whereby depressing the?membrane control panel?also depresses said button and causes a connection to be made across said grid,theredy energizing said?light emitting means.

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