Illuminated keyswitch structure and illuminating module thereof
An illuminated keyswitch structure with an illuminating module includes a base plate, a drive circuit board under the base plate, a spacer between the drive circuit board and the base plate, and a light-emitting part on the circuit board. The spacer has a through hole communicating with an opening of the base plate in a vertical direction. The light-emitting part is located in the through hole, and falls within a projection of the opening in the vertical direction. The light-emitting part has a top surface that is lower than or equal to a bottom surface of the base plate in the vertical direction. The structure of the illuminated keyswitch structure around the light-emitting part can keep flat by the spacer. The spacer can prevent the light-emitting part from structurally entering the opening, avoiding structural interference between the light-emitting part and other components above the base plate.
1. An illuminated keyswitch structure, comprising:
a base plate, including at least one opening;
a drive circuit board, disposed under the base plate;
a spacer, disposed onto the drive circuit board, the spacer having an upper surface, a lower surface, a through hole and a sidewall defining the through hole;
a light-emitting part, disposed on the drive circuit board and in the through hole of the spacer, the light-emitting part having a top surface lower than or equal to the upper surface of the spacer; and
a light-permeable covering structure covering above the light-emitting part;
wherein the spacer comprises a top adhesive and a bottom adhesive respectively disposed on the upper surface and the lower surface of the spacer;
wherein a total thickness of the spacer, the top adhesive, and the bottom adhesive is greater than or equal to a sum of a height of the light-emitting part and a thickness of a portion of the light-permeable covering structure above the light-emitting part.
2. The illuminated keyswitch structure according to claim 1 , further comprising a switch circuit board, disposed in parallel to the base plate, wherein the switch circuit board has a light-permeable portion overlapping a vertical projection of the opening of the base plate.
3. An illuminating module for providing back light from underneath an opening of a keyswitch base plate, the illuminating module comprising:
a drive circuit board;
a spacer, disposed onto the drive circuit board, the spacer having an upper surface, a lower surface, a through hole and a sidewall defining the through hole;
a light-emitting part, disposed on the drive circuit board and in the through hole of the spacer, the light-emitting part having a top surface lower than or equal to the upper surface of the spacer; and
a light-permeable covering structure covering above the light-emitting part;
wherein the spacer comprises a top adhesive and a bottom adhesive respectively disposed on the upper surface and the lower surface of the spacer;
wherein the upper surface or the lower surface has an annular clearance fringe without the top adhesive or the bottom adhesive respectively, and the annular clearance fringe surrounds a periphery of the through hole.
4. The illuminating module according to claim 3 , wherein the annular clearance fringe of the top adhesive or the bottom adhesive surrounds a vertical projection of the light-permeable covering structure and/or the light-emitting part.
5. The illuminating module according to claim 3 , wherein a vertical projection of the light-permeable covering structure locates inside the annular clearance fringe of the top adhesive or the bottom adhesive.
6. The illuminating module according to claim 3 , wherein the annular clearance fringe of the top adhesive or the bottom adhesive surrounds a vertical projection of the opening of the base plate.
7. The illuminating module according to claim 3 , wherein the light-emitting part has a top surface and a side surface, and the light-permeable covering structure covers the top surface and the side surface.
8. The illuminating module according to claim 7 , wherein an air separation wall is formed between the light-permeable covering structure and the sidewall of the through hole.
9. The illuminating module according to claim 3 , wherein the light-permeable covering structure contacts at least a portion of the drive circuit board and/or the sidewall of the spacer.
10. The illuminating module according to claim 3 , wherein the light-permeable covering structure comprises a first covering layer and a second covering layer, the first covering layer is disposed above the light-emitting part, and the second covering layer is disposed on the first covering layer.
11. The illuminating module according to claim 10 , wherein the first covering layer or the second covering layer is an optical wavelength conversion layer.
12. The illuminating module according to claim 3 , wherein the light-permeable covering structure comprises a light modulation portion on top of the light-emitting part.
13. The illuminating module according to claim 3 , wherein the light-permeable covering structure is lower than or equal to the bottom surface of the base plate.
14. The illuminating module according to claim 3 , wherein the sidewall of the through hole reflects light and is a cup-shaped structure with a cup opening facing the opening of the keyswitch baseplate.
15. The illuminating module according to claim 3 , wherein the sidewall of the through hole is a tapered surface, a concave surface, or a stepped surface.
16. The illuminating module according to claim 3 , wherein the spacer is opaque.
17. The illuminating module according to claim 3 , wherein the spacer is light-transmissive, and the sidewall of the spacer is opaque.
18. The illuminating module according to claim 3 , wherein the spacer is light-transmissive.
19. The illuminating module according to claim 3 , wherein the light-emitting part emits light from the top surface.
20. An illuminating module for providing back light from underneath an opening of a keyswitch base plate, the illuminating module comprising:
a drive circuit board;
a spacer, disposed onto the drive circuit board, the spacer having an upper surface, a lower surface, a through hole and a sidewall defining the through hole;
a light-emitting part, disposed on the drive circuit board and in the through hole of the spacer, the light-emitting part having a top surface lower than or equal to the upper surface of the spacer; and
a light-permeable covering structure covering above the light-emitting part;
wherein the spacer comprises a top adhesive and a bottom adhesive respectively disposed on the upper surface and the lower surface of the spacer;
wherein a sum of a height of the sidewall of the through hole and thicknesses of the top adhesive and the bottom adhesive is greater than or equal to a sum of a height of the light-emitting part and a thickness of a portion of the light-permeable covering structure above the light-emitting part.