US 11,728,108 B2
Control device
Yung-Tai Pan, Taipei (TW); Chun-Nan Su, Taipei (TW); Chien-Pang Chien, Taipei (TW); and Ting-Sheng Wang, Taipei (TW)
Assigned to PRIMAX ELECTRONICS LTD., Taipei (TW)
Filed by Primax Electronics Ltd., Taipei (TW)
Filed on Jun. 14, 2022, as Appl. No. 17/840,573.
Claims priority of provisional application 63/298,953, filed on Jan. 12, 2022.
Prior Publication US 2023/0223213 A1, Jul. 13, 2023
Int. Cl. H01H 13/705 (2006.01); H01H 13/704 (2006.01); H01H 13/86 (2006.01)
CPC H01H 13/705 (2013.01) [H01H 13/704 (2013.01); H01H 13/86 (2013.01); H01H 2219/062 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A control device, comprising:
a display panel;
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 comprising an upper film layer, a lower film layer and at least one ink member, wherein the upper film layer comprises a first top surface, at least one first opening and a first bottom surface, and the lower film layer comprises a second top surface, at least one second opening and a second bottom surface, 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 at least one second opening runs through the second top surface and the second bottom surface, and the second top surface faces the upper film layer, wherein the upper film layer further comprises a first circuit contact point, and the lower film layer further comprises a second circuit contact point, wherein the first circuit contact point is formed on the first bottom surface, 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, and 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, wherein the at least one ink member is formed on the first bottom surface or the second top surface, and the upper film layer and the lower film layer are separated from each other through the at least one ink member; and
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
an optical film layer and a first protrusion structure, wherein the optical film layer is formed on the first top surface, and the first protrusion structure is formed on the optical film layer, wherein the first protrusion structure is overlapped with the first circuit contact point and the second circuit contact point along the vertical direction, 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 first circuit contact point is contacted with the second circuit contact point; and wherein the keycap comprises a press surface, a lateral surface, a third bottom surface and a second protrusion structure, wherein the second protrusion structure is protruded downwardly from the third bottom surface, and the second protrusion structure is overlapped with the first protrusion structure, the first circuit contact point and the second circuit contact point along the vertical direction, wherein the support part comprises a recess, and the second protrusion structure is received within the recess.