Patent ID: 11915889
Assignee: PRIMAX ELECTRONICS LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 12:
13. A control device, comprising:
a display panel; and
at least one key structure located over the display panel, wherein each of the at least one key structure comprises:
a keycap, wherein the keycap is light-transmissible;
a membrane switch;
an elastic element arranged between the keycap and the membrane switch, wherein the elastic element comprises a support part, a lateral wall and a lower part, wherein the support part is connected with the keycap, and the lateral wall is arranged between the support part and the lower part; and
a first protrusion structure formed on the membrane switch, wherein when the keycap is pressed down, the keycap or the support part is moved downwardly to push the first protrusion structure, so that the membrane switch is triggered;

wherein the membrane switch comprises an upper film layer and a lower film layer, wherein the upper film layer comprises a first top surface, at least one first opening, a first bottom surface and a first circuit contact point, and the lower film layer comprises a second top surface, at least one second opening, a second bottom surface and second circuit contact point, wherein the at least one first opening runs through the first top surface and the first bottom surface, the first bottom surface faces the lower film layer, the first circuit contact point is formed on the first bottom surface, the at least one second opening runs through the second top surface and the second bottom surface, the second top surface faces the upper film layer, the second circuit contact point is formed on the second top surface, and the first circuit contact point and the second circuit contact point are overlapped with each other along a vertical direction, wherein a light beam emitted by the display panel is transmitted upwardly through the at least one second opening, the at least one first opening and the keycap.