TWI765689B - Thin keyswitch - Google Patents

Abstract

A thin keyswitch keyswitch includes a base plate, a lower insulative substrate, a lower circuit, an upper insulavitve substrate, an upper switch contact, a keycap , and membrane switch layer, a keycap, and a resilient actuating device. The base plate has a formed-through opening, and includes at least two lower switch contacts. The upper switch contact is formed on the upper insulative substrate. The upper insulative substrate is disposed on an upper surface of the base plate, and the lower insulative substrate is disposed on a lower surface of the base plate such that the upper switch contact and the at least two lowerswitchcontacts are disposed within the formed-through opening and aligned with each other. The resilient actuating device is disposed between the keycap and the upper insulative substrate, and is located above a periphery of the formed-through opening. When the keycap is pressed and then moved to a pressing position, the resilient actuating device deforms and then urges the upper insulative substrateto be deformed so that the upper switch contact contacts the at least two lower switch contacts.

Description

thin key

The present invention relates to a thin key, and in particular to a thin key with a substrate as the isolation layer of the membrane switch layer.

The keyboard has become a common input peripheral device in the market. The keys of the keyboards of the prior art all include a bottom plate and a membrane switch circuit layer. The thin film circuit layer of the prior art includes a thin film switch layer including an upper circuit film, an isolation layer and a lower circuit film. The isolation layer is arranged between the upper circuit film and the lower circuit film to separate the upper switch contact of the upper circuit film and the lower switch contact of the lower circuit film. Therefore, the thickness of the keys of the prior art must be limited by the thickness of the bottom plate plus the thickness of the membrane switch circuit layer.

In addition, in addition to the bottom plate and the membrane switch circuit layer, the light-emitting key of the prior art also includes a light guide plate. The light emitted by the light emitting element (eg, the light emitting diode element) is incident from the side of the light guide plate, and then guided by the light guide plate to the keycap to travel. As the size of commercial light-emitting elements is gradually reduced, the prior art light-emitting keys employ small-sized light-emitting elements, and the light-emitting elements are arranged to emit light upward to illuminate the keycap. The light-emitting keys of the prior art that use the light-emitting keys upward can dispense with the light guide plate, but still cannot dispense with the thickness of the circuit layer for electrically bonding the light-emitting elements.

Clearly, the prior art keys still have room for thinning, with or without the light-emitting function.

Therefore, one technical problem to be solved by the present invention is to provide a thin key. The thin key according to the present invention uses the substrate as the isolation layer of the membrane switch layer.

The thin key according to the first preferred embodiment of the present invention includes a substrate, a lower insulating substrate, a first lower circuit, an upper insulating substrate, an upper switch contact, a keycap, a lifting mechanism and an elastic actuating element. The substrate has a first upper surface, a first lower surface and a through opening. The lower insulating substrate has a second upper surface and a second lower surface. The first lower circuit is formed on the second upper surface of the lower insulating substrate and includes at least two lower switch contacts. The lower insulating base material is disposed on the first lower surface of the substrate with the second upper surface, so that at least two lower switch contacts are placed in the through openings of the substrate. The upper insulating substrate has a third upper surface and a third lower surface. The upper switch contact is formed on the third lower surface of the upper insulating substrate. The upper insulating base material is disposed on the first upper surface of the substrate with the third lower surface, so that the upper switch contact is placed in the through opening of the substrate, and at least two lower switch contacts are aligned. The keycap is placed above the upper insulating substrate. The lifting mechanism is arranged between the base plate and the keycap. The lifting mechanism restricts the keycap from moving between the unpressed position and the pressed position. The elastic actuating element is disposed between the key cap and the upper insulating base material, and is located above the periphery of the through opening of the substrate. The elastic actuating element includes an actuating column. When the keycap is pressed and then moved to the pressing position, the elastic actuating element deforms and is pressed by the actuating post and deforms the upper insulating base material so that the upper switch contact contacts at least two lower switch contacts.

In one embodiment, the substrate may be formed of metal.

Further, the thin key according to the first preferred embodiment of the present invention further includes a second lower circuit and at least one light-emitting element. The second lower circuit is formed on the second upper surface of the lower insulating substrate. At least one light-emitting element is electrically connected to the second lower circuit and disposed in the through opening of the substrate. At least one light-emitting element is used for emitting light upward. The upper insulating base material and the elastic actuating element are transparent.

Further, the thin key according to the first preferred embodiment of the present invention further includes a second lower circuit and at least one light-emitting element. The substrate has at least one through hole. The second lower circuit is formed on the second upper surface of the lower insulating substrate. At least one light-emitting element is electrically connected to the second lower circuit. Each light-emitting element corresponds to one of the at least one through-holes of the substrate, and is disposed in its corresponding through-hole. At least one light-emitting element is used for emitting light upward. The upper insulating substrate is light-transmitting.

The thin key according to the second preferred embodiment of the present invention includes a base plate, a lower insulating base material, a first lower circuit, a key cap, a lifting mechanism and an elastic actuating element. The substrate has a first upper surface, a first lower surface and a through opening. The lower insulating substrate has a second upper surface. The first lower circuit is formed on the second upper surface of the lower insulating substrate and includes at least two switch contacts. The lower insulating base material is disposed on the first lower surface of the substrate with the second upper surface, so that at least two switch contacts are placed in the through opening of the substrate. The keycap is placed above the base plate. The lifting mechanism is arranged between the base plate and the keycap. The lifting mechanism restricts the keycap from moving between the unpressed position and the pressed position. The elastic actuating element is disposed between the keycap and the base plate, and is located above the periphery of the through opening of the base plate. The elastic actuating element includes an actuating column. The actuating post is electrically conductive at least at its ends. When the keycap is pressed and moved to the pressed position, the elastic actuating element deforms so that the end of the actuating column penetrates through the through opening of the base plate and contacts at least two switch contacts.

In one embodiment, the substrate may be formed of metal.

Further, the thin key according to the second preferred embodiment of the present invention further includes a second lower circuit and at least one light-emitting element. The second lower circuit is formed on the second upper surface of the lower insulating substrate. At least one light-emitting element is electrically connected to the second lower circuit and disposed in the through opening of the substrate. At least one light-emitting element is used for emitting light upward. The elastic actuating element is light transmissive.

Further, the thin key according to the second preferred embodiment of the present invention further includes a second lower circuit and at least one light-emitting element. The substrate has at least one through hole. The second lower circuit is formed on the second upper surface of the lower insulating substrate. At least one light-emitting element is electrically connected to the second lower circuit. Each light-emitting element corresponds to one of the at least one through-holes of the substrate, and is disposed in its corresponding through-hole. At least one light-emitting element is used for emitting light upward.

Different from the prior art, the thin key according to the present invention uses the substrate as the isolation layer of the membrane switch layer. Furthermore, if the light-emitting element is used in the thin key according to the present invention, the circuit for electrically connecting the light-emitting element is formed on the lower insulating substrate similarly to the lower circuit including the lower switch contact. Thereby, the thickness of the thin key according to the present invention can be greatly reduced.

The advantages and spirit of the present invention can be further understood from the following detailed description of the invention and the accompanying drawings.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 , which schematically depict a thin key 1 according to a first preferred embodiment of the present invention. FIG. 1 schematically shows a thin key 1 according to a first preferred embodiment of the present invention in an external view. FIG. 2 is a partial cross-sectional view of the thin key 1 in FIG. 1 along the line A-A. FIG. 3 is a partial cross-sectional view taken along the line A-A of a deformation of one of the thin keys 1 in FIG. 1 .

As shown in FIG. 1 and FIG. 2 , the thin key 1 according to the first preferred embodiment of the present invention includes a substrate 10 , a lower insulating substrate 11 , a first lower circuit 12 , an upper insulating substrate 13 , and an upper switch contact 14. The key cap 15, the lifting mechanism 16 and the elastic actuating element 17.

The substrate 10 has a first upper surface 102 , a first lower surface 104 and a through opening 106 .

The lower insulating substrate 11 has a second upper surface 112 and a second lower surface 114 . The first lower circuit 12 is formed on the second upper surface 112 of the lower insulating substrate 11 and includes at least two lower switch contacts 122 . The lower insulating substrate 11 is disposed on the first lower surface 104 of the substrate 10 with the second upper surface 112 , so that at least two lower switch contacts 122 are placed in the through openings 106 of the substrate 10 .

The upper insulating substrate 13 has a third upper surface 132 and a third lower surface 134 . The upper switch contact 14 is formed on the third lower surface 134 of the upper insulating substrate 13 . The upper insulating substrate 13 is disposed on the first upper surface 102 of the substrate 10 with the third lower surface 134 , so that the upper switch contacts 14 are placed in the through openings 106 of the substrate 10 and are aligned with at least two lower switch contacts 122 .

The keycap 15 is placed above the upper insulating substrate 13 . The lifting mechanism 16 is disposed between the base plate 10 and the keycap 15 . The lifting mechanism 16 restricts the movement of the keycap 15 between the unpressed position and the pressed position. The elastic actuating element 17 is disposed between the key cap 15 and the upper insulating base material 13 , and is located above the periphery of the through opening 106 of the substrate 10 . The elastic actuating element 17 includes an actuating column 172 .

When the keycap 15 is pressed and moved to the pressed position, the elastic actuating element 17 deforms and is held by the actuating post 172 and deforms the upper insulating substrate 13 so that the upper switch contact 14 contacts at least two lower switch contacts 122 . When the keycap 5 is released, the elastic actuating element 17 provides the restoring force required for the keycap 15 to return to the unpressed position, and separates the actuating post 172 from the upper insulating substrate 13 . It should be emphasized that the thin key 1 according to the first preferred embodiment of the present invention uses the substrate 10 as the isolation layer of the membrane switch layer, so the thickness of the isolation layer of the membrane switch layer in the prior art is reduced.

In an embodiment, the substrate 10 may be formed of metal, but the invention is not limited thereto. The substrate 10 may also be formed of other materials with high rigidity (eg, ceramic materials, etc.).

Further, as shown in FIG. 2 , the thin key 1 according to the first preferred embodiment of the present invention further includes a second lower circuit 18 and at least one light-emitting element 19 . The second lower circuit 18 is formed on the second upper surface 112 of the lower insulating substrate 11 . At least one light-emitting element 19 is electrically connected to the second lower circuit 18 and disposed in the through opening 106 of the substrate 10 . At least one light-emitting element 19 is used for emitting light upward. The upper insulating substrate 13 and the elastic actuating element 17 are transparent. The keycap 15 has a light-shielding layer 150 and a light-transmitting area 152 . In the example shown in FIG. 1 and FIG. 2 , the light-transmitting area 152 presents a pattern, and the pattern represents one of characters, numbers, symbols, and function keys, but the present invention is not limited thereto. The light-transmitting area 152 on the keycap 15 of the thin key 1 according to the first preferred embodiment of the present invention may also represent an indicator light. The light emitted by the at least one light-emitting element 19 is directed to the light-transmitting area 152 of the keycap 15 , and then passes through the light-transmitting area 152 of the keycap 15 .

Further, as shown in FIG. 3 , the thin key 1 according to the first preferred embodiment of the present invention further includes a second lower circuit 18 and at least one light-emitting element 19 . The difference from the thin key 1 shown in FIG. 2 is that the substrate 10 also has at least one through hole 108 . The second lower circuit 18 is formed on the second upper surface 112 of the lower insulating substrate 11 . At least one light-emitting element 19 is electrically connected to the second lower circuit 18 . Each light emitting element 19 corresponds to one of the through holes 108 in the at least one through hole 108 of the substrate 10 and is disposed in the corresponding through hole 108 thereof. At least one light-emitting element 19 is used for emitting light upward. The upper insulating substrate 13 is light-transmitting. Likewise, the light-transmitting area 152 on the keycap 15 may present a pattern, or represent an indicator light. The light emitted by the at least one light-emitting element 19 is directed to the light-transmitting area 152 of the keycap 15 , and then passes through the light-transmitting area 152 of the keycap 15 . Elements and components marked with the same numbers as those in FIG. 2 in FIG. 3 have the same or similar structures and functions, and will not be repeated here.

It should be emphasized that, if the light-emitting element 19 is used in the thin key 1 according to the first preferred embodiment of the present invention, the second lower circuit 18 electrically connected to the light-emitting element 19 is connected to the first lower circuit 18 including the lower switch contact 122 . The circuit 12 is also formed on the lower insulating substrate 11 . Therefore, if the thin key 1 according to the first preferred embodiment of the present invention has a light-emitting function, its overall thickness will not increase the thickness of another insulating substrate.

In practical application, the substrate 10 of the thin key 1 according to the first preferred embodiment of the present invention has at least one through hole 108 . The light emitting element 19 may be disposed in the through opening 106 and the through hole 108 of the substrate 10 .

Please refer to FIG. 4 , FIG. 5 and FIG. 6 , which schematically depict the thin key 2 according to the second preferred embodiment of the present invention. FIG. 4 schematically shows the thin key 2 according to the second preferred embodiment of the present invention in an external view. FIG. 5 is a partial cross-sectional view of the thin key 2 in FIG. 4 along the line B-B. FIG. 6 is a partial cross-sectional view taken along the line B-B of a deformation of one of the thin keys 2 in FIG. 4 .

As shown in FIG. 4 and FIG. 5 , the thin key 2 according to the second preferred embodiment of the present invention includes a substrate 20 , a lower insulating substrate 21 , a first lower circuit 22 , a key cap 23 , a lifting mechanism 24 and an elastic moving element 25.

The substrate 20 has a first upper surface 202 , a first lower surface 204 and a through opening 206 .

The lower insulating substrate 21 has a second upper surface 212 and a second lower surface 214 . The first lower circuit 22 is formed on the second upper surface 212 of the lower insulating substrate 21 and includes at least two switch contacts 222 . The lower insulating substrate 21 is disposed on the first lower surface 204 of the substrate 20 with the second upper surface 212 , so that at least two switch contacts 222 are placed in the through openings 206 of the substrate 20 .

The keycap 23 is placed above the base plate 20 . The lifting mechanism 24 is disposed between the base plate 20 and the keycap 23 . The lifting mechanism 24 restricts the movement of the keycap 23 between the unpressed position and the pressed position. The elastic actuating element 25 is disposed between the keycap 23 and the base plate 20 , and is located above the periphery of the through opening 206 of the base plate 20 . The elastic actuating element 25 includes an actuating post 252 . At least the end 2522 of the actuating post 252 is electrically conductive.

When the keycap 23 is pressed and moved to the pressed position, the elastic actuating element 25 deforms so that the end 2522 of the actuating post 252 penetrates the through opening 206 of the substrate 20 and contacts at least two switch contacts 222 . When the keycap 23 is released, the elastic actuating element 25 provides the restoring force required for the keycap 23 to return to the unpressed position, and separates the end 2522 of the actuating post 252 from the at least two switch contacts 222 . It should be emphasized that the thin key 2 according to the second preferred embodiment of the present invention uses the substrate 20 as the isolation layer of the membrane switch layer, and removes the upper circuit film, thus reducing the size of the membrane switch layer of the prior art. The thickness of the isolation layer and the upper circuit film.

In an embodiment, the substrate 20 may be formed of metal, but the invention is not limited thereto. The substrate 20 may also be formed of other materials with high rigidity (eg, ceramic materials, etc.).

Further, as also shown in FIG. 5 , the thin key 2 according to the second preferred embodiment of the present invention further includes a second lower circuit 26 and at least one light-emitting element 27 . The second lower circuit 26 is formed on the second upper surface 212 of the lower insulating substrate 21 . At least one light-emitting element 27 is electrically connected to the second lower circuit 26 and disposed in the through opening 206 of the substrate 20 . At least one light-emitting element 27 is used for emitting light upward. The elastic actuating element 25 is light transmissive. The keycap 23 has a light-shielding layer 230 and a light-transmitting area 232 . In the examples shown in FIGS. 4 and 5 , the light-transmitting area 232 presents a pattern, and the pattern represents one of characters, numbers, symbols, and function keys, but the present invention is not limited thereto. The light-transmitting area 232 on the keycap 23 of the thin key 2 according to the second preferred embodiment of the present invention may also represent an indicator light. The light emitted by the at least one light-emitting element 27 is directed to the light-transmitting area 232 of the keycap 23 , and then passes through the light-transmitting area 232 of the keycap 23 .

Further, as shown in FIG. 6 , the thin key 2 according to the second preferred embodiment of the present invention further includes a second lower circuit 26 and at least one light-emitting element 27 . The difference from the thin key 2 shown in FIG. 5 is that the base plate 20 also has at least one through hole 208 . The second lower circuit 26 is formed on the second upper surface 212 of the lower insulating substrate 21 . At least one light-emitting element 27 is electrically connected to the second lower circuit 26 . Each light emitting element 27 corresponds to one of the through holes 208 of the at least one through hole 208 of the substrate 20 , and is disposed in the corresponding through hole 208 . At least one light-emitting element 27 is used for emitting light upward. Likewise, the light-transmitting area 232 on the keycap 23 may present a pattern or represent an indicator light. The light emitted by the at least one light-emitting element 27 is directed to the light-transmitting area 232 of the keycap 23 , and then passes through the light-transmitting area 232 of the keycap 23 . Elements and components marked with the same numbers as those in FIG. 5 in FIG. 6 have the same or similar structures and functions, and will not be repeated here.

It should be emphasized that, if the light-emitting element 27 is used in the thin key 2 according to the second preferred embodiment of the present invention, the second lower circuit 26 electrically connected to the light-emitting element 27 is connected to the first lower circuit 26 including the lower switch contact 222 . The circuit 22 is also formed on the lower insulating substrate 21 . Therefore, if the thin key 2 according to the second preferred embodiment of the present invention has a light-emitting function, its overall thickness will not increase the thickness of another insulating substrate.

In practical application, the substrate 20 of the thin key 2 according to the second preferred embodiment of the present invention has at least one through hole 208 . The light emitting element 27 may be disposed in the through opening 206 and the through hole 208 of the substrate 20 .

From the above detailed description of the present invention, it can be clearly understood that the thin key according to the present invention uses the substrate as the isolation layer of the membrane switch layer. Furthermore, if the light-emitting element is used in the thin key according to the present invention, the circuit for electrically connecting the light-emitting element is formed on the lower insulating substrate similarly to the lower circuit including the lower switch contact. Therefore, the thickness of the thin key according to the present invention can be greatly reduced.

Through the detailed description of the preferred embodiments above, it is hoped that the features and spirit of the present invention can be described more clearly, rather than limiting the aspect of the present invention by the preferred embodiments disclosed above. On the contrary, the intention is to cover various modifications and equivalent arrangements within the scope of the claimed scope of the present invention. Therefore, the scope of the claims to which the present invention is claimed should be construed in the broadest sense in light of the foregoing description so as to encompass all possible modifications and equivalent arrangements.

1: Thin button

10: Substrate

102: First upper surface

104: First lower surface

106: Through opening

108: Through hole

11: Lower insulating substrate

112: Second upper surface

114: Second lower surface

12: The first circuit

122: Lower switch contact

13: Upper insulating substrate

132: Third upper surface

134: Third lower surface

14: Upper switch contact

15: Keycaps

150: shading layer

152: Translucent area

16: Lifting mechanism

17: Elastic actuation element

172: Action Column

18: Second lower circuit

19: Light-emitting element

2: Thin keys

20: Substrate

202: First upper surface

204: First lower surface

206: Through opening

208: Through hole

21: Lower insulating substrate

212: Second upper surface

214: Second lower surface

22: The first circuit

222: switch contacts

23: Keycaps

230: shading layer

232: light transmission area

24: Lifting mechanism

25: Elastic actuation element

252: Action column

2522: end

26: Second lower circuit

27: Light-emitting element

FIG. 1 is an external view of a keyboard equipped with thin keys according to a first preferred embodiment of the present invention. FIG. 2 is a partial cross-sectional view of the thin key in FIG. 1 along the line A-A. FIG. 3 is a partial cross-sectional view taken along line A-A of one of the deformations of the thin key in FIG. 1. FIG. 4 is an external view of a keyboard equipped with thin keys according to a second preferred embodiment of the present invention. FIG. 5 is a partial cross-sectional view of the thin key in FIG. 1 along the line B-B. FIG. 6 is a partial cross-sectional view taken along line B-B of one of the deformations of the thin key in FIG. 1 .

1: Thin button

10: Substrate

102: First upper surface

104: First lower surface

106: Through opening

11: Lower insulating substrate

112: Second upper surface

114: Second lower surface

12: The first circuit

122: Lower switch contact

13: Upper insulating substrate

132: Third upper surface

134: Third lower surface

14: Upper switch contact

15: Keycaps

150: shading layer

152: Translucent area

16: Lifting mechanism

17: Elastic actuation element

172: Action Column

18: Second lower circuit

19: Light-emitting element

Claims (6)

A thin key, comprising: a substrate with a first upper surface, a first lower surface and a through opening, the substrate is formed by a metal; an insulating base material with a second upper surface and a second lower surface; a first lower circuit is formed on the second upper surface and includes at least two lower switch contacts, wherein the lower insulating substrate is disposed on the first lower surface of the substrate with the second upper surface On the surface, the at least two lower switch contacts are placed in the through opening; an upper insulating base material has a third upper surface and a third lower surface; an upper switch contact is formed on the third On the lower surface, the upper insulating base material is disposed on the first upper surface of the substrate with the third lower surface, so that the upper switch contact is placed in the through opening and aligned with the at least two lower switch contacts ; a key cap, which is placed above the upper insulating base material; a lifting mechanism, which is arranged between the base plate and the key cap, the lifting mechanism restricts the key cap between a non-pressed position and a pressed position moving; an elastic actuating element is disposed between the key cap and the upper insulating base material and is located above a periphery of the through opening and includes an actuating column, wherein when the key cap is pressed and then moved to the pressing When in position, the elastic actuating element deforms and then the actuating post deforms the upper insulating base material so that the upper switch contact contacts the at least two lower switch contacts; a second lower circuit is formed on the second upper surface ;as well as At least one light-emitting element is electrically connected to the second lower circuit and disposed in the through opening, the at least one light-emitting element is used for emitting a light upward, wherein the upper insulating substrate and the elastic actuating element are transparent light. A thin key, comprising: a base plate with a first upper surface, a first lower surface, a through opening and at least one through hole, the base plate is formed by a metal; an insulating base material with a second upper surface and a second lower surface; a first lower circuit is formed on the second upper surface and includes at least two lower switch contacts, wherein the lower insulating base material is disposed on the substrate with the second upper surface on the first lower surface, so that the at least two lower switch contacts are placed in the through opening; an upper insulating base material has a third upper surface and a third lower surface; an upper switch contact is formed On the third lower surface, the upper insulating base material is disposed on the first upper surface of the substrate with the third lower surface, so that the upper switch contact is placed in the through opening and aligned with the at least two a lower switch contact; a keycap placed above the upper insulating base material; a lift mechanism set between the base plate and the keycap, the lift mechanism restricts the keycap to a non-pressed position and a move between pressing positions; an elastic actuating element is disposed between the keycap and the upper insulating base material and is located above a periphery of the through opening and includes an actuating post, wherein when the keycap is pressed, the When moving to the pressing position, the elastic actuating element is deformed, and then the upper insulating base material is deformed by the actuating column, so that the upper switch contact contacts the at least two lower switch contacts; A second lower circuit is formed on the second upper surface; and at least one light-emitting element is electrically connected to the second lower circuit, and each light-emitting element corresponds to one of the at least one through-holes and is disposed In its corresponding through hole, the at least one light-emitting element is used for emitting a light upward, wherein the upper insulating substrate is transparent. A thin key, comprising: a substrate having a first upper surface, a first lower surface and a through opening; a lower insulating base material having a second upper surface; a first lower circuit formed on the second on the upper surface, and includes at least two switch contacts, wherein the lower insulating base material is disposed on the first lower surface of the substrate with the second upper surface, so that the at least two switch contacts are located in the through opening inside; a key cap, which is placed above the base plate; a lifting mechanism, which is arranged between the base plate and the key cap, the lifting mechanism restricts the key cap from moving between an unpressed position and a pressed position; and an elastic actuating element, which is arranged between the key cap and the base plate and is located above a periphery of the through opening and includes an actuating post, at least one end of the actuating post is conductive, and when the key cap is When pressed and moved to the pressing position, the elastic actuating element deforms so that the end of the actuating column penetrates the through opening and contacts the at least two switch contacts. The thin key as claimed in claim 3, wherein the substrate is formed of a metal. The thin key according to claim 4, further comprising: a second lower circuit formed on the second upper surface; and at least one light-emitting element electrically connected to the second lower circuit and disposed in the through hole Inside the opening, the at least one light-emitting element is used for emitting a light upward, wherein the elastic actuating element is transparent. The thin key according to claim 4, wherein the substrate has at least one through hole, the thin key further comprises: a second lower circuit formed on the second upper surface; and at least one light-emitting element connected to the The second lower circuit is electrically connected, and each light emitting element corresponds to one of the at least one through hole and is disposed in the corresponding through hole, and the at least one light emitting element is used for emitting a light upward.

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