TWI621973B - Input device and method capable of avoiding error action of switch - Google Patents

Abstract

An input device and method for preventing a switch from malfunctioning. The input device includes a first diode, a second diode, and a switch. The first diode is electrically connected to the first diode. The switch is electrically connected between the first diode and the second diode.

Description

Input device and method for preventing switch malfunction

The present disclosure relates to an input device and method, and to an input device and method for preventing a switch from malfunctioning.

An input device, typically a switch, can be operated by triggering its switch to operate an electronic device coupled to the input device. However, when the button is triggered once, the static electricity of the finger may invade the circuit board through the button, causing the circuit board to misjudge the user to trigger multiple times; or, when the user's finger is placed on the switch, static electricity may cause the circuit even if the switch is not triggered. The board misjudges that the user has a trigger switch and erroneously outputs a trigger signal.

Therefore, there is an urgent need to propose an input technique that can improve conventional problems to improve the above problems.

The disclosed embodiments provide an input device and method for preventing a switch malfunction, which can improve the conventional problem.

According to an embodiment of the present disclosure, a malfunction prevention switch is proposed. Input device. The input device includes a first diode, a second diode, and a switch. The first diode is electrically connected to the first diode. The switch is electrically connected between the first diode and the second diode.

According to another embodiment of the present disclosure, a method of preventing a switch malfunction is proposed. The method includes the following steps. Determining whether a potential of a switch changes from a first level to a second level; and if the potential of the switch changes from a first level to a second level, ignoring the first level and the second level A first noise between the two.

In order to better understand the above and other aspects of the present disclosure, the following detailed description of the embodiments and the accompanying drawings will be described below, but not limited thereto.

10‧‧‧Electronic devices

20‧‧‧mat

30‧‧‧Table

100‧‧‧ input device

110‧‧‧First Diode

111‧‧‧negative

112‧‧‧ positive

120‧‧‧second diode

121‧‧‧negative

122‧‧‧ positive

130‧‧‧ switch

135‧‧‧ button

140‧‧‧ Controller

145‧‧‧First wire

150‧‧‧second wire

155‧‧‧Shell

155a‧‧‧Bottom opening

160‧‧‧Electrical Department

165‧‧‧ boards

170‧‧‧Connecting line

C1‧‧‧ connection point

E-‧‧‧negative static

E+‧‧‧正静电

E‧‧‧ Static

G1‧‧‧first ground potential

G2‧‧‧second ground potential

L1‧‧‧ first standard

L2‧‧‧ second standard

N1‧‧‧ first noise

N2‧‧‧ second noise

S110, S120, S130, S140, S150, S160‧‧ steps

V1‧‧‧ potential

Vcc‧‧‧ circuit potential

W1‧‧‧First section length

W2‧‧‧Second section length

FIG. 1A is a functional block diagram of an input device according to an embodiment of the invention.

FIG. 1B is a schematic view showing the input device of FIG. 1A placed on a table.

FIG. 2A is a flow chart showing a method for preventing a switch malfunction according to another embodiment of the present invention.

FIG. 2B is a schematic diagram showing the potential change of the input device of FIG. 1A.

FIG. 1A is a functional block diagram of an input device 100 according to an embodiment of the invention, and FIG. 1B is a schematic view showing the input device 100 of FIG. 1A placed on a table 30.

The input device 100 of the present embodiment is exemplified by a mouse. However, the input device 100 can also be an input interface on a keyboard or a home appliance or other electronic device having a mechanical switch. As shown in FIG. 1A, the input device 100 includes a first diode 110, a second diode 120, at least one switch 130, at least one button 135 (shown in FIG. 1B), a controller 140, and a first wire. 145, second lead 150, housing 155 (shown in Figure 1B), conductive portion 160 (shown in Figure 1B), circuit board 165 (shown in Figure 1B) and connecting line 170 (shown in Figure 1B).

The switch 130, the first diode 110, the second diode 120, the controller 140, the first wire 145, and the second wire 150 may be disposed on the circuit board 165. The button 135 is disposed above the switch 130. The user can press the button 135 to trigger the switch 130 to operate the electronic device 10 connected to the input device 100. The electronic device 10 is, for example, a device controlled by the input device 100, such as a computer main body, a display, a home appliance, or the like.

The first diode 110 is electrically connected to the second diode 120 , and the switch 130 is electrically connected between the second diode 120 and the first diode 110 . In this manner, the static electricity E entering the input device 100 can be conducted to the second ground potential G2 through the second diode 120 or can be conducted to the first ground potential G1 through the first diode 110.

As shown in FIG. 1A, the first diode 110 and the second diode 120 are connected in series. For example, the first diode 110 has a negative electrode 111 and a positive electrode 112, and the second diode 120 has a negative electrode 121 and a positive electrode 122, wherein the negative electrode 111 of the first diode 110 and the positive electrode 122 of the second diode 120 are The first wire 145 is connected. In addition, the positive electrode 112 of the first diode 110 is electrically connected to the first ground potential G1, so that The static electricity can be conducted through the first diode 110 to the first ground potential G1.

The switch 130 is coupled to the controller 140 by a second wire 150. The first wire 145 and the second wire 150 are connected to a connection point C1. The switch 130 and the controller 140 are connected in parallel between the first diode 110 and the second diode 120; thus, the static electricity E occurring in the second wire 150 passes through the first two before entering the controller 140. The polar body 110 or the second diode 120 is diverted to a ground potential.

As shown in FIG. 1A, when the negative static electricity E- occurs, the negative static electricity E- can be conducted through the first diode 110 to the first ground potential G1. The electrostatic conduction path of the negative static electricity E- sequentially passes through the second wire 150 between the switch 130 and the connection point C1, the first wire 145, the first diode 110, and the first ground potential G1.

As shown in FIG. 1B, the housing 155 has a bottom surface opening 155a. The housing 155 may be partially or entirely made of a metal conductive material. The conductive portion 160 is disposed on the bottom surface opening 155a of the housing 155 to contact the mat 20 or the table 30. The mat 20 here is, for example, a mouse pad. The conductive portion 160 may be a partial metal housing of the input device 100, or may be a conductive member that is independent of the housing and protrudes or is exposed from the housing. The positive electrode 112 of the first diode 110 is electrically connected to the first ground potential G1 through the conductive portion 160, and the electrostatic conduction path of the negative static E- sequentially passes through the second wire 150 between the switch 130 and the connection point C1. The first wire 145, the first diode 110, the mat 20, and the table 30 are connected to the first ground potential G1. The mat 20 has a conductive wire or its own material is a conductive material to channel the negative static electricity E- to the first ground potential G1. Similarly, the table 30 has a conductive line or its own material is a conductive material to channel the negative static electricity E- to the first ground potential G1. When the input device 100 is a keyboard, negative The electrostatic conduction path of the electrostatic E- may not pass through the mat 20. When inputting other devices of the device 100, the electrostatically conductive path of the negative static electricity E- may not pass through the mat 20 and the table 30.

As shown in FIG. 1A, the positive electrostatic E+ can be conducted through the second diode 120 to the second ground potential G2. In the present embodiment, the positive electrostatic E+ first enters the circuit potential Vcc of the electronic device 10, and then is diverted to the second ground potential G2 electrically connected to the electronic device 10. The negative electrode 111 of the first diode 110 is connected to the positive electrode 122 of the second diode 120, and the negative electrode 121 of the second diode 120 is electrically connected to the circuit potential Vcc of the electronic device 10, and is electrically connected to the circuit potential Vcc. The second ground potential G2. The connecting wire 170 extends outward from the housing 155 to electrically connect the negative electrode 121 of the second diode 120 and the circuit potential Vcc of the electronic device 10. In this way, the electrostatic conduction path of the positive electrostatic E+ can sequentially pass through the second wire 150 between the switch 130 and the connection point C1, the first wire 145, the second diode 120, the connection line 170, and the circuit of the electronic device 10. The potential Vcc and the second ground potential G2.

FIG. 2A is a flow chart showing a method for preventing a switch malfunction according to another embodiment of the present invention, and FIG. 2B is a schematic diagram showing a change of a potential V1 of the input device 100 of FIG. 1A.

In step S110, referring to FIG. 2B at the same time, the controller 140 of the input device 100 determines whether the potential V1 of the switch 130 is changed from the first level L1 to the second level L2, wherein the second level L2 is lower than the first level. The level L1 is, and the second level L2 is greater than or equal to zero. For example, when the switch 130 is not triggered, the potential V1 may be in the state of the first level L1; when the switch 130 is triggered, the potential V1 changes to the second level L2, so the flow proceeds to step S120; if not, continues to wait Signal change change.

In step S120, when the potential V1 of the switch 130 is changed from the first level L1 to the second level L2, indicating that the switch 130 is triggered, the controller 140 determines between the first level L1 and the second level L2. The first segment length W1 of the first noise N1 is used to determine the segment range of the first noise N1.

In step S130, the first noise N1 between the first level L1 and the second level L2 is ignored, for example, the first noise N1 having the first segment length W1 is skipped to prevent the switch from malfunctioning. In detail, due to the mechanical congenital factor of the switch 130, the switch 130 is triggered to generate noise. If the controller 140 considers the up and down fluctuation of the first noise N1, the controller 140 may be erroneously determined that the switch 130 is triggered multiple times and outputs a plurality of trigger signals (misoperation). In contrast, in the embodiment of the present invention, since the controller 140 excludes the section of the first noise N1, the misjudgment problem can be avoided.

In step S140, the controller 140 determines whether the potential V1 of the switch 130 is changed from the second level L2 to the first level L1. For example, when the switch 130 is in the continuous trigger state, the potential V1 is maintained at the second level L2; when the switch 130 is released, the potential V1 is changed from the second level L2 to the first level L1, so the flow proceeds to step S150; No, continue to wait for the signal change.

In step S150, when the potential V1 of the switch 130 is changed from the second level L2 to the first level L1, indicating that the switch 130 is released, the controller 140 determines between the second level L2 and the first level L1. The second segment length W2 of the second noise N2 is used to determine the segment range of the second noise N2.

In step S160, the second level L2 and the first level L1 are ignored. The second noise N2 between, for example, skips the second noise N2 having the second segment length W2 to prevent the switch from malfunctioning. In detail, due to the mechanical congenital factor of the switch 130, the switch 130 is triggered to generate noise. If the controller 140 considers the fluctuation of the second noise N2, the controller 140 may be erroneously determined that the switch 130 is triggered multiple times and outputs a plurality of trigger signals (misoperation). In contrast, in the embodiment of the present invention, since the controller 140 excludes the second noise N2, the malfunction problem can be avoided.

In addition, the flow of preventing the switch from malfunctioning in the embodiment of the present invention may be implemented by a software or a firmware. The software or firmware can be loaded by the controller 140 to perform the above-described process of preventing the malfunction of the switch.

In summary, the input device for preventing the switch from malfunctioning in the embodiment of the present invention causes the static electricity to be diverted to the ground potential by the first diode or the second diode before entering the controller. In another embodiment, the method for preventing the switch from malfunctioning in the embodiment of the present invention can ignore or skip the noise segment of the trigger potential signal of the input device, and prevent the noise from causing the controller to misjudge that the user has triggered the switch multiple times.

In the above, the disclosure has been disclosed in several embodiments, but it is not intended to limit the disclosure. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure. Therefore, the scope of protection of this disclosure is subject to the definition of the scope of the appended claims.

Claims (8)

An input device for preventing a switch from malfunctioning, comprising: a first diode; a second diode electrically connected to the first diode; and a switch electrically connected to the first diode And the second diode, wherein the first diode is connected in series with the second diode, the switch is connected in parallel between the first diode and the second diode; and a controller And connected in parallel between the first diode and the second diode. The input device of claim 1, wherein a negative electrode of the first diode is connected to a positive electrode of the second diode, and a positive electrode of the first diode is electrically connected to a first Ground potential. The input device of claim 2, further comprising: a casing having a bottom opening; and a conductive portion disposed on the bottom opening of the casing; wherein the first diode The positive electrode is electrically connected to the first ground potential through the conductive portion. The input device of claim 3, wherein a negative electrostatic discharge path sequentially passes through the first diode, the conductive portion, and the first ground potential. The input device of claim 1, wherein a negative electrode of the first diode is connected to a positive electrode of the second diode, and a negative electrode of the second diode is transmitted through a circuit of an electronic device. The electric potential is electrically connected to a second ground potential; the input device further includes: a casing; and a connecting wire extending from the casing and electrically connecting the negative electrode of the second diode to the electronic device The circuit potential; wherein a positive electrostatic discharge path sequentially passes through the second diode, the connection line, and the circuit potential and the second ground potential. A method for preventing a switch malfunctioning, comprising: determining whether a potential of a switch is changed from a first level to a second level; and if the potential of the switch is changed from the first level to the second level A first noise between the first level and the second level is ignored. The method of claim 6, further comprising: determining a length of the first segment of the first noise if the potential of the switch is changed from the first level to the second level; The step of ignoring the first noise between the first level and the second level includes: Skip the length of the first segment. The method of claim 6, further comprising: determining whether the potential of the switch is changed from the second level to the first level; and if the potential of the switch is changed from the second level Up to the first level, a second noise between the second level and the first level is ignored.