KR20070008903A - Capacitance switch which can indicate the operating state by light - Google Patents

Abstract

A capacitance switch indicating an operating state by light is provided to make a light of light emission unit approach a switch display unit of a case and then pass out properly without deteriorating a function of the capacitance switch. In a capacitance switch indicating an operating state by light, a first PCB(Printed Circuit Board)(20), a second PCB(30), and an outer case(10) are laminated sequentially with a predetermined gap. A plurality of switch display units(11) is formed on the outer case(10). A plurality of light-blocking vertical barrier walls(29,39) is installed between the first PCB(20) and the second PCB(30), and the second PCB(30) and the outer case(10). A space is formed on a bottom of the switch display unit(11) by corresponding to the switch display unit(11) one to one. A light emitting element(32) is mounted on each space of an upper face of the first PCB(20). A group of capacitance detecting circuit(22) and detection plate(24) is mounted on each space of the second PCB(30). The detection plate(24) is installed on an upper face of the second PCB(30). A conductive elastic body(26) is laminated on each space of the detection plate(24). A through hole for penetration of light is formed on the second PCB(30) and the conductive elastic body(26) located on a direct upper face of the light emitting element(32).

Description

Capacitance switch which can indicate the operating state by light}

1A to 1C are views for explaining a capacitive switch for light emitting display according to a first embodiment of the present invention;

2A to 2C are views for explaining a capacitive switch for light emitting display according to a second embodiment of the present invention;

3A to 3D are views for explaining a capacitive switch for light emitting display according to a third embodiment of the present invention;

4 is a view for explaining a capacitive switch for light emitting display according to a fourth embodiment of the present invention;

5 is a view for explaining a capacitive switch for light emitting display according to a fifth embodiment of the present invention;

6A and 6B are diagrams for describing a capacitive switch for light emitting display according to a sixth embodiment of the present invention.

<Description of Reference Numbers for Main Parts of Drawings>

10: outer case 11: switch display

12: fixing nut 20, 30: PCB substrate

22: capacitive sensing circuit portion 24: sensing plate

26: conductive elastomer 28: light transfer conductive sheet

29, 39: vertical barrier for light blocking 32: light emitting device

40: light transfer adhesive 50: light separation module

52: light transfer sheet 54: annular conductive elastomer

55: cylindrical light separation case 56: sensing electrode

57, 57a, 57b: connecting electrode 58: fastening portion

59: support tube 59a: support stand

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capacitive switch for a light emitting display, and more particularly, to a capacitive switch for a light emitting display in which a light emitting unit can be used to distinguish a state when a switch is in operation and inactive.

The capacitive switch locates the PCB on which the capacitive sensing circuit unit is configured on the back of the outer case, and detects a change in capacitance induced through the outer case when a person or a conductive object approaches the front of the outer case and sets a predetermined reference amount. When there is a change in capacitance above, a configuration for outputting a detection signal to the outside is taken. At this time, the buzzer sounds or emits light when the switch is operated to indicate a state in which the capacitive switch is operated for convenience of use.

In order to position the light emitting unit under the outer case and display the operation state of the switch, it is necessary to allow the light of the light emitting unit to reach the switch display unit of the case and properly exit the outside without degrading the function of the capacitive switch.

In the related art, for this purpose, holes in the PCB and the conductive elastic body positioned between the light emitting unit and the outer case are made to reach the switch display unit of the outer case, whereby the sensing unit (knob) of the capacitive switch is Since it is disposed at the outer portion of the switch display unit in the outer case, when the center portion of the switch display unit is touched by hand, the detection through the sensing unit is not properly performed, thereby causing a problem that the switching operation is not performed smoothly.

In order for a switching operation to occur when the center portion of the switch display unit is touched, the sensitivity of the capacitive switch must be sensitive. In this case, interference with an adjacent switch occurs and a malfunction occurs. For this reason, the conventional case has a disadvantage in that the switch display of the outer case can be made only with a small area.

Therefore, the technical problem to be solved by the present invention is to solve the above-mentioned problems by allowing the switching operation to be performed properly by touching the center of the switch display unit in the outer case while allowing the operation state of the switch to be known through light emission. The present invention provides a capacitive switch for light emitting display.

In order to achieve the above technical problem, a light emitting display capacitance switch according to a first example of the present invention is provided.

The first PCB substrate, the second PCB substrate, and the outer case are sequentially stacked with a predetermined distance therebetween, and a plurality of switch display units are formed in the outer case, between the first PCB and the second PCB substrate, and between the A plurality of light blocking vertical partitions are respectively provided between the second PCB and the outer case, and a compartment is formed to correspond one-to-one to the switch display unit under the switch display unit.

A light emitting device is mounted in each compartment on an upper surface of the first PCB substrate, and a capacitive sensing circuit unit and a sensing plate are installed in each compartment of the second PCB substrate, and the sensing plate is provided on the upper surface of the second PCB substrate. Installed,

A conductive elastic body is stacked on each compartment on the sensing plate, and a through hole for passing light is formed in the second PCB and the conductive elastic body positioned directly above the light emitting device.

The light transmitting conductive sheet may be installed on the conductive elastic body so that the light transmitting conductive sheet is in close contact with the bottom surface of the outer case.

In accordance with a second aspect of the present invention, there is provided a capacitive switch for a light emitting display.

The first PCB substrate, the second PCB substrate, and the outer case are sequentially stacked while being spaced apart from each other by a predetermined distance, and the plurality of switch display parts are formed on the outer case, and the plurality of PCB substrates are disposed between the first PCB substrate and the second PCB substrate. Two light blocking vertical bulkheads are installed so that a compartment is formed to correspond to the switch display unit one-to-one under the switch display unit,

A light emitting device is mounted in each compartment on an upper surface of the first PCB substrate, and a capacitive sensing circuit unit and a sensing plate are installed in each compartment of the second PCB substrate, and the sensing plate is provided on the upper surface of the second PCB substrate. Installed,

Light transmission conductive sheets are laminated on each compartment on the sensing plate,

The lower surface of the outer case is characterized in that the light transfer adhesive is continuously attached to the light transfer conductive sheet is bonded to the outer case by the light transfer adhesive.

In accordance with a third aspect of the present invention, there is provided a capacitive switch for light emitting display.

 The PCB and the outer case are sequentially stacked while being spaced apart from each other by a predetermined distance. A plurality of switch display parts are formed on the outer case, and a plurality of light emitting elements and a capacitance sensing circuit part are formed on the upper surface of the PCB to provide a plurality of them. The light separation module is installed on the light emitting device on the upper surface of the substrate.

The light separation module,

A cylindrical light splitting case having a hole penetrating up and down and installed to position the light emitting element in the hole, a sensing electrode placed on the sidewall of the case, and being connected to the sensing electrode and extending to the bottom of the case; And a ring-shaped conductive elastomer having a connecting electrode electrically connected to the sensing circuit unit and a through-hole placed on the sensing electrode and communicating with a hole formed in the light separation case. It is characterized in that it is in close contact with the lower surface of the outer case.

Here, the conductive light transfer sheet is placed on the annular conductive elastic body to cover the through hole of the annular conductive elastic body, so that the conductive light transfer sheet may be in close contact with the bottom surface of the outer case.

 In order to achieve the above technical problem, a light emitting display capacitance switch according to a fourth example of the present invention is provided.

The PCB and the outer case are sequentially stacked while being spaced apart from each other by a predetermined distance. A plurality of switch display parts are formed on the outer case, and a plurality of light emitting elements and a capacitance sensing circuit part are formed on the upper surface of the PCB to provide a plurality of them. The light separation module is installed on the light emitting device on the upper surface of the substrate.

The light separation module,

An annular shape having a through-hole penetrating and having a cylindrical light separating case installed so that the light emitting element is located in the hole, and a through hole placed on the light separating case and communicating with a hole formed in the light separating case. A conductive elastic body, a conductive light transfer sheet placed on the annular conductive elastic body and covering the through hole of the annular conductive elastic body, and a connection electrode extending from the conductive light transfer sheet and electrically connected to the sensing circuit unit. Including,

The conductive light transfer sheet is in close contact with the bottom surface of the outer case.

In order to achieve the above technical problem, a light emitting display capacitance switch according to a fifth example of the present invention is provided.

The PCB and the outer case are sequentially stacked while being spaced apart from each other by a predetermined distance. A plurality of switch display parts are formed on the outer case, and a plurality of light emitting elements and a capacitance sensing circuit part are formed on the upper surface of the PCB to provide a plurality of them. The light separation module is installed on the light emitting device on the upper surface of the substrate.

The light separation module,

A cylindrical light separation case having a hole penetrating up and down and installed so that the light emitting element is located in the hole, a support tube standing vertically in the hole of the cylindrical light separation case, and inserted into the support tube, The lower end of the support tube comes out of the upper end and includes a connecting electrode electrically connected to the sensing circuit unit, and a conductive elastic body placed on the connecting electrode and having a smaller diameter than the hole of the cylindrical light separation case. It features.

According to a sixth aspect of the present invention, there is provided a capacitive switch for light emitting display.

The PCB and the outer case are sequentially stacked while being spaced apart from each other by a predetermined distance, and a plurality of switch display units are formed on the outer case, and a plurality of light blocking vertical partition walls are installed between the PCB and the outer case, respectively, under the switch display unit. A compartment is formed to correspond one-to-one to the switch display unit.

The PCB includes a light emitting element, a capacitance sensing circuit unit, and a sensing plate formed in each compartment, and the sensing plate is installed on an upper surface of the PCB.

A conductive elastic body is laminated on each compartment on the sensing plate, and the through-hole for light passing is formed in the conductive elastic body.

Here, the light transmitting conductive sheet is installed on the conductive elastic body so that the light transmitting conductive sheet can be in close contact with the bottom surface of the outer case.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. The following embodiments are only presented to understand the content of the present invention, and those skilled in the art may make many modifications within the technical spirit of the present invention. Therefore, it should be understood that the scope of the present invention should not be construed as being limited to these embodiments.

Example 1

1A to 1C are diagrams for describing a capacitive switch for light emitting display according to a first embodiment of the present invention. FIG. 1A is a front view, FIG. 1B is a plan view, and FIG. 1C is a schematic view.

Referring to FIGS. 1A to 1C, the first PCB substrate 30, the second PCB substrate 20, and the outer case 10 are sequentially stacked while being spaced apart from each other by a predetermined distance, and are disposed on an upper surface of the outer case 10. The switch display part 11 is formed in multiple numbers. The switch display section 11 is a part touched by a human hand. The first PCB substrate 30, the second PCB substrate 20, and the outer case 10 are compressed to each other by the fixing nut 12.

A plurality of light blocking vertical partitions 29 and 39 are disposed between the first PCB 30 and the second PCB 20 and between the second PCB 20 and the outer case 10, respectively. Therefore, a compartment is formed under the switch display unit 11 so as to correspond one-to-one to the switch display unit.

The light emitting device 32 is mounted in each compartment on the first PCB 30, and the capacitive sensing circuit unit 22 and the sensing plate 24 are formed in each compartment in the second PCB 20. do. The sensing plate 24 is installed on the upper surface of the second PCB substrate 20.

On the sensing plate 24, the conductive elastic body 26 and the light transmitting conductive sheet 28 are sequentially stacked in each compartment. Therefore, the light transfer conductive sheet 28 is in close contact with the bottom surface of the outer case 10. Through holes for passing light are formed in the second PCB 20 and the conductive elastic body 26 positioned directly above the light emitting device 32. The conductive elastic body 26 serves to close the outer case 10 and the light transfer conductive sheet 28 to close the gap, which greatly affects the change in capacitance.

According to the first embodiment of the present invention as described above, the front surface of the switch display portion 11 by the conductive light transfer sheet 28 has the same capacitive switch sensitivity, the light emitted from the light emitting element 32 is also smoothly It is transmitted to the external switch display section 11. That is, since the sensing portion (knob) of the capacitive switch is substantially the periphery including the switch display portion 11 rather than the outer portion of the switch display portion 11, the center portion of the switch display portion 11 by hand is different. Even when touching, the sensing through the sensing circuit unit 22 is properly performed.

If the size of the switch display unit 11 is not large compared to the finger, the installation of the conductive light transfer sheet 28 does not have a significant effect on the sensitivity, so that the conductive light transfer sheet 28 is not installed and the annular conductive elastic body is not provided. 24 may be in direct contact with the bottom surface of the outer case 10.

Example 2

2A to 2C are diagrams for describing a capacitive switch for light emitting display according to a second embodiment of the present invention. FIG. 2A is a front view, FIG. 2B is a plan view, and FIG. 2C is an exploded view. In this case, the conductive light transfer sheet 28 is immediately placed on the sensing plate 24 without the conductive elastic body 26, and the light transfer adhesive 40 is continuously attached to the lower surface of the outer case 10 to transmit the light. The conductive sheet 28 has a configuration in which the light transfer adhesive 40 is attached to the outer case 20. The light transfer adhesive 40 serves as the conductive elastic body 26 so that the outer case 10 and the light transfer conductive sheet 28 closely adhere to each other.

In the case of the second embodiment, unlike the case of the first embodiment, the light blocking vertical partition 29 does not need to be installed between the second PCB 20 and the outer case 10.

Example 3

3A to 3D are diagrams for describing a light emitting display capacitive switch according to a third embodiment of the present invention. FIG. 3A is a front view, FIG. 3B is a plan view, FIG. 3C is an exploded view, and 3D is light. It is an exploded view of the module 50 for separation.

In this case, unlike the first and second embodiments, only one PCB substrate 20 is required. On the upper surface of the PCB substrate 20, a light separation module 50 as shown in FIG. 3D is installed on the light emitting device 32.

The light separation module 50 includes a cylindrical light separation case 55, a sensing electrode 56, a connection electrode 57, a ring-shaped conductive elastic body 54, and a light transfer sheet 52. The cylindrical light separation case 55 has a hole penetrating the top and bottom and is coupled to the PCB substrate 20 by the fastening unit 58 so that the light emitting element 32 is located in the hole. The sensing electrode 56 is disposed on the sidewall of the case 55, and the connection electrode 57 extends to the lower portion of the case 55 while being connected to the sensing electrode 56 to be electrically connected to the sensing circuit unit 22. do. Thus, unlike the first and second embodiments, the sensing plate 24 is also unnecessary. The annular conductive elastic body 54 is placed on the sensing electrode 56 and has a through hole communicating with the hole formed in the case 55. The light transfer sheet 52 is placed on the annular conductive elastic body 54 while covering the through hole of the annular conductive elastic body 54. The conductive light transfer sheet 52 is in close contact with the bottom surface of the outer case 10.

If the size of the switch display portion 11 is not large compared to the finger, the installation of the conductive light transfer sheet 52 does not have a significant effect on the sensitivity, so that the conductive light transfer sheet 52 is not installed and the annular conductive elastic body is not provided. 54 may be in direct contact with the bottom surface of the outer case 10.

In the case of the third embodiment, unlike the case of the first and second embodiments, the light blocking vertical bulkheads 29 and 39 are not required separately, and the independent light emitting and sensing sections are obtained by the light separation module 50.

Example 4

FIG. 4 is a view for explaining a light emitting display capacitance switch according to a fourth embodiment of the present invention, and since only the configuration of the light separation module 50 is different from that of the third embodiment, only this portion is shown. will be.

Unlike the case of the third embodiment, the connection electrode 57a extends from the conductive light transfer sheet 52 and is electrically connected to the sensing circuit unit. The connection electrode 57a may be linear or tape. Therefore, unlike the case of the third embodiment, the sensing electrode 56 is not necessary separately.

Example 5

FIG. 5 is a view for explaining a capacitive switch for light emitting display according to a fifth embodiment of the present invention. Since only the configuration of the light separation module 50 is different from that of the third embodiment, only this portion is shown. will be. In this case, the installation form of the connecting electrode 57b and the conductive elastic body 54 is different from that of the third embodiment.

Specifically, the support tube 59 is vertically erected in the cylindrical light separation case 55, which is connected to and supported on the side wall of the case 55 by the support 59a. The connecting electrode 57b is inserted into the support tube 59 so that the upper end thereof comes out of the upper inlet of the support tube 59 and the lower end thereof is electrically connected to the sensing circuit unit 22. The conductive elastic body 54 is placed on the connection electrode 57b and has a diameter smaller than that of the hole of the cylindrical light separation case 55. That is, the connecting electrode 57b has a rod shape, and the conductive elastic body 54 forms a disc placed thereon. Therefore, even without a separate light transfer sheet, the light emitted from the light emitting device 32 exits the switch display unit 11 through a gap between the case 55 and the conductive elastic body 54 so that the switch display unit 11 lights up as a whole. do.

Example 6

6A and 6B are diagrams for describing a capacitive switch for light emitting display according to a sixth embodiment of the present invention. FIG. 6A is a front view and FIG. 6B is an exploded view.

In this case, unlike the first embodiment, only one PCB substrate is used. That is, it is not necessary to use the second PCB substrate 20, and the capacitance sensing circuit unit 22, the sensing plate 24, the conductive elastic body 26, and the light transmitting conductive sheet ( 28 is directly installed on the first PCB 20, so that the vertical partition 29 provided on the second PCB 20 is also unnecessary. With such a configuration, the object of the present invention can be sufficiently achieved even with a simple structure as compared with the case of the first embodiment.

If the size of the switch display unit 11 is not large compared to the finger, the installation of the conductive light transfer sheet 28 does not have a significant effect on the sensitivity, so that the conductive light transfer sheet 28 is not installed and the annular conductive elastic body is not provided. 24 may be in direct contact with the bottom surface of the outer case 10.

As described above, according to the present invention, when the light emitting portion is positioned below the outer case and the operation state of the switch is displayed, the light of the light emitting portion reaches the switch display portion of the case without degrading the function of the capacitive switch. Since the sensing part (knob) of the capacitive switch is substantially the periphery including the switch display part 11 rather than the outer part of the switch display part 11, unlike the conventional method, Even when touching the center part by hand, only the touched switch operates properly without causing interference with the switch located next to it.

Claims (9)

The first PCB substrate, the second PCB substrate, and the outer case are sequentially stacked with a predetermined distance therebetween, and a plurality of switch display units are formed in the outer case, between the first PCB and the second PCB substrate, and between the A plurality of light blocking vertical partitions are respectively provided between the second PCB and the outer case, and a compartment is formed to correspond one-to-one to the switch display unit under the switch display unit. A light emitting device is mounted in each compartment on an upper surface of the first PCB substrate, and a capacitive sensing circuit unit and a sensing plate are installed in each compartment of the second PCB substrate, and the sensing plate is provided on the upper surface of the second PCB substrate. Installed, On the sensing plate, a conductive elastic body is stacked in each compartment, and a through hole for light passing is formed in the second PCB and the conductive elastic body positioned directly above the light emitting device. . The light emitting display capacitive switch according to claim 1, wherein a light transmitting conductive sheet is provided on the conductive elastic body so that the light transmitting conductive sheet is in close contact with the bottom surface of the outer case. The first PCB substrate, the second PCB substrate, and the outer case are sequentially stacked while being spaced apart from each other by a predetermined distance, and the plurality of switch display parts are formed on the outer case, and the plurality of PCB substrates are disposed between the first PCB substrate and the second PCB substrate. Two light blocking vertical bulkheads are installed so that a compartment is formed so as to correspond one-to-one to the switch display unit, A light emitting device is mounted in each compartment on an upper surface of the first PCB substrate, and a capacitive sensing circuit unit and a sensing plate are installed in each compartment of the second PCB substrate, and the sensing plate is provided on the upper surface of the second PCB substrate. Installed, Light transmission conductive sheets are laminated on each compartment on the sensing plate, And a light transfer adhesive continuously attached to a lower surface of the outer case so that the light transfer conductive sheet is adhered to the outer case by the light transfer adhesive. The PCB and the outer case are sequentially stacked while being spaced apart from each other by a predetermined distance. A plurality of switch display parts are formed on the outer case, and a plurality of light emitting elements and a capacitance sensing circuit part are formed on the upper surface of the PCB to provide a plurality of them. The light separation module is installed on the light emitting device on the upper surface of the substrate. The light separation module, A cylindrical light splitting case having a hole penetrating up and down and installed to position the light emitting element in the hole, a sensing electrode placed on the sidewall of the case, and being connected to the sensing electrode and extending to the bottom of the case; And a ring-shaped conductive elastomer having a connecting electrode electrically connected to the sensing circuit unit and a through-hole placed on the sensing electrode and communicating with a hole formed in the light separation case. The capacitive switch for light emitting display, characterized in that the close contact with the lower surface of the outer case. The method of claim 4, wherein the conductive light transfer sheet is placed on the annular conductive elastic body to cover the through hole of the annular conductive elastic body, the conductive light transfer sheet is in close contact with the lower surface of the outer case. Capacitive switch for light emitting display. The PCB and the outer case are sequentially stacked while being spaced apart from each other by a predetermined distance. A plurality of switch display parts are formed on the outer case, and a plurality of light emitting elements and a capacitance sensing circuit part are formed on the upper surface of the PCB to provide a plurality of them. The light separation module is installed on the light emitting device on the upper surface of the substrate. The light separation module, An annular shape having a through-hole penetrating and having a cylindrical light separating case installed so that the light emitting element is located in the hole, and a through hole placed on the light separating case and communicating with a hole formed in the light separating case. A conductive elastic body, a conductive light transfer sheet placed on the annular conductive elastic body and covering the through hole of the annular conductive elastic body, and a connection electrode extending from the conductive light transfer sheet and electrically connected to the sensing circuit unit. Including, And the conductive light transfer sheet is in close contact with the bottom surface of the outer case. The PCB and the outer case are sequentially stacked while being spaced apart from each other by a predetermined distance. A plurality of switch display parts are formed on the outer case, and a plurality of light emitting elements and a capacitance sensing circuit part are formed on the upper surface of the PCB to provide a plurality of them. The light separation module is installed on the light emitting device on the upper surface of the substrate. The light separation module, A cylindrical light separation case having a hole penetrating up and down and installed so that the light emitting element is located in the hole, a support tube standing vertically in the hole of the cylindrical light separation case, and inserted into the support tube, The lower end of the support tube comes out of the upper end and includes a connecting electrode electrically connected to the sensing circuit unit, and a conductive elastic body placed on the connecting electrode and having a smaller diameter than the hole of the cylindrical light separation case. A capacitive switch for light emitting display. The PCB and the outer case are sequentially stacked while being spaced apart from each other by a predetermined distance, and a plurality of switch display units are formed on the outer case, and a plurality of light blocking vertical partition walls are installed between the PCB and the outer case, respectively, under the switch display unit. A compartment is formed to correspond one-to-one to the switch display unit. The PCB includes a light emitting element, a capacitance sensing circuit unit, and a sensing plate formed in each compartment, and the sensing plate is installed on an upper surface of the PCB. The capacitive switch for light emitting display according to claim 1, wherein conductive elastic bodies are stacked in each compartment on the sensing plate, and through holes for light passing are formed in the conductive elastic bodies. The capacitive switch for light emitting display according to claim 8, wherein a light transmitting conductive sheet is provided on the conductive elastic body so that the light transmitting conductive sheet is in close contact with the bottom surface of the outer case.

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