Switch, keyboard, and method for operating switch

Abstract

A switch includes: an input button surface adapted to receive input pressure from a user; and a digital switch located below the input button surface, configured to generate a digital switch activation signal when the pressure received on the input button surface is greater than or equal to a specified digital pressure threshold. The switch also includes an analog switch adapted to generate an analog switch activation signal when the pressure received on the input button surface is greater than or equal to a specified analog pressure threshold. The specified analog pressure threshold is greater than the specified digital pressure threshold, the digital switch activation signal is a binary digital signal, and the analog switch activation signal is variable and corresponds to an analog sensed value of the pressure received on the input button surface.

Description

Technical Field

[0001] The present disclosure generally relates to a switch, a keyboard including a switch, and a method of operating a switch. Background Art

[0002] This section provides background information related to the present disclosure but this background information is not necessarily prior art.

[0003] Keyboards sometimes include membrane digital switches, such as tactile switches including metal domes, non-tactile metal switches including conductive pads, etc. Additionally, force-sensitive resistors include materials whose resistance changes when force, pressure, or mechanical stress is applied. Summary of the Invention

[0004] The present invention relates to a switch, comprising: an input button surface, adapted to receive input pressure from a user; a digital switch, adapted to generate a digital switch activation signal when the pressure received on the input button surface is greater than or equal to a specified digital pressure threshold; and an analog switch, adapted to generate an analog switch activation signal when the pressure received on the input button surface is greater than or equal to a specified analog pressure threshold; wherein the specified analog pressure threshold is greater than a specified digital pressure threshold.

[0005] Preferably, the digital switch activation signal is a binary digital signal.

[0006] Preferably, the analog switch activation signal is variable and corresponds to an analog sensed value of pressure received on the input button surface.

[0007] Preferably, the digital switch is located below the surface of the input button.

[0008] Preferably, the analog switch comprises a force-sensitive resistor.

[0009] Preferably, the force sensitive resistor comprises a non-linear resistance characteristic, wherein the resistance of the force sensitive resistor decreases non-linearly as the pressure on the input button surface increases.

[0010] Preferably, the device further comprises a controller configured to measure the analog switch activation signal and determine the input pressure received on the input button surface according to the measured analog switch activation signal.

[0011] Preferably, the controller is configured to determine a change in slope of the analog switch activation signal and compare the change in slope with a non-linear resistance characteristic of the force sensitive resistor to determine an input pressure received on the input button surface.

[0012] Preferably, the device further comprises a controller configured to: determine a clear start step in response to receiving a digital switch activation signal; and implement one or more analog functions according to the received analog switch activation signal in response to determining the clear start step.

[0013] Preferably, said one or more simulated functions comprises controlling the speed or flow rate of the machine.

[0014] Preferably, said one or more simulated functions includes controlling the speed of a crane or vehicle.

[0015] Preferably, the one or more simulated functions include controlling the flow rate of a concrete pump or a high pressure washer.

[0016] Preferably, the digital switch is a first digital switch; the switch further includes a controller and a second digital switch; the second digital switch is located below the first digital switch relative to the input button surface; an analog switch including a force-sensitive resistor is coupled in series with the second digital switch; and the controller is configured to: detect a second digital switch activation signal when the second digital switch is closed; in response to detecting the second digital switch activation signal, measure the initial resistance of the force-sensitive resistor; and set the measured initial resistance to a calibration value, which is used to measure an analog force-sensitive resistor signal corresponding to the resistance of the force-sensitive resistor to determine the input pressure received on the input button surface.

[0017] Preferably, the analog switch is located below the digital switch relative to the input button surface.

[0018] Preferably, the digital switch is a first digital switch; the switch further comprises a second digital switch located below the first digital switch relative to the input button surface; and the analog switch is coupled in series with the second digital switch.

[0019] Preferably, the input button surface and the digital switch define a tactile switch comprising a metal dome; the input button surface comprises a covering layer, the covering layer contacting a first side of the metal dome; a second side of the metal dome opposite the first side is positioned to contact an electrical conductor of the digital switch in response to pressure received on the covering layer in contact with the first side of the metal dome.

[0020] Preferably, the input button surface and the digital switch define a non-tactile switch including a conductive pad; the input button surface includes a covering layer that contacts a first side of the conductive pad; a second side of the conductive pad opposite the first side is positioned to contact an electrical conductor of the digital switch in response to pressure received on the covering layer that contacts the first side of the conductive pad.

[0021] Preferably, the input button surface and the numeric switch define a rocker switch.

[0022] Preferably, the switch is a thin film digital analog switch.

[0023] The present invention also relates to a keyboard comprising at least one switch as described above.

[0024] The present invention also relates to a keyboard comprising a plurality of the above switches.

[0025] The present invention also relates to a method for operating a switch, wherein the switch includes an input button surface, a digital switch, and an analog switch, the method comprising: receiving input pressure from a user at the input button surface; generating a digital switch activation signal when the pressure received by the digital switch on the input button surface is greater than or equal to a specified digital pressure threshold; and generating an analog switch activation signal when the pressure received by the analog switch on the input button surface is greater than or equal to a specified analog pressure threshold; wherein the specified analog pressure threshold is greater than the specified digital-analog pressure threshold.

[0026] Preferably, the digital switch is a first digital switch, and the switch also includes a second digital switch located below the first digital switch relative to the input button surface, and the analog switch is coupled in series with the second digital switch; the method also includes: detecting a second digital switch activation signal when the second digital switch is closed; in response to detecting the second digital switch activation signal, measuring the initial resistance of the force-sensitive resistor; setting the measured initial resistance to a calibration value, which is used to measure an analog force-sensitive resistor signal corresponding to the resistance of the force-sensitive resistor to determine the input pressure received on the input button surface.

[0027] Preferably, the method further comprises: determining an explicit start step in response to receiving a digital switch activation signal; and implementing one or more analog functions according to the received analog switch activation signal in response to determining the explicit start step.

[0028] Preferably, the method further comprises: performing one or more analog functions of the machine in accordance with the analog switch activation signal only after the digital switch activation signal is generated. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

[0030] Figure 1 is a block diagram of a thin film digital analog switch according to an example embodiment of the present disclosure;

[0031] Figure 2 is a block diagram of a thin film digital analog switch including a force sensitive resistor connected in series with a digital switch according to another example embodiment of the present disclosure;

[0032] Figure 3 It includes two Figure 1 A top view of a keyboard with membrane digital-analog switches is shown;

[0033] Figure 4 It includes two Figure 2 A top view of a keyboard with membrane digital-analog switches is shown;

[0034] Figure 5 is a cross-sectional view of a tactile switch according to another example embodiment of the present disclosure; and

[0035] Figure 6 is a cross-sectional view of a non-tactile switch according to another example embodiment of the present disclosure.

[0036] Corresponding reference numerals indicate corresponding, though not necessarily identical, parts throughout the several views of the drawings. DETAILED DESCRIPTION

[0037] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0038] Disclosed herein are exemplary embodiments of a membrane digital-analog switch. The membrane digital-analog switch can combine digital and analog switch functionality in a single button, where an initial press of the button generates a digital signal, while further pressure on the button adjusts the analog signal value corresponding to the input pressure.

[0039] These example membrane digital analog switches can be used in any suitable application, such as those requiring a clear start-up procedure before the analog function engages. Some example applications include crane remote controls for two speeds, three speeds, more than three speeds, etc., where the different speeds correspond to the current analog value of the membrane digital analog switch.

[0040] In some embodiments, a membrane digital analog switch can be used to control a crane with a stepless drive and input pressure (e.g., from a thumb, finger, etc.) to control the crane's speed; or to control a machine where flow is proportional to input pressure (e.g., a concrete pump, a pressure washer, etc.). As another example, vehicle speed can be controlled based on input pressure (e.g., for tracked vehicles, etc.).

[0041] The digital switch may include any suitable digital switch element capable of generating a digital activation signal (e.g., a binary on or off signal, etc.) in response to a user-applied input pressure above a digital pressure threshold. For example, the digital switch may include a mechanical digital switch, such as a push button switch, a rocker switch, a tactile switch (e.g., including a metal dome), a non-tactile switch (e.g., including a conductive pad), and the like.

[0042] When a user increases pressure to a level equal to or above a digital switch activation threshold, the analog switch element can output, sense, detect, etc., an analog switch activation signal that changes in response to the change in input pressure. For example, the analog switch can include a force-sensitive resistor whose resistance changes when force, pressure, mechanical stress, etc., is applied. This changing resistance can be measured and used to control the speed or other appropriate functions of a crane, machine, vehicle, etc., in accordance with the user's input pressure.

[0043] In a rocker switch, initial pressure can activate a digital switch, while further pressure in the same motion adjusts the analog function of the analog switch. Similarly, a tactile switch can be initially activated by a digital signal, followed by analog control with the same motion of applying pressure to the top of the tactile switch.

[0044] In some embodiments, the force-sensitive resistor may have nonlinear characteristics, low repeatability, etc. The force-sensitive resistor may have an initial high resistance value, which may decrease rapidly as pressure initially increases, and then change more slowly as pressure continues to increase. Thus, the force-sensitive resistor of the analog switch element may be combined with the digital switch element in various optional configurations.

[0045] For example, an analog force-sensitive resistor can be connected in series with a second digital switch, so that the starting point for user engagement of the analog switch force-sensitive resistor is clear. When the digital switch is closed, an initial resistance value can be measured, and the remaining resistance value slope of the force-sensitive resistor can be calibrated based on the measured initial resistance value.

[0046] As another example, a force-sensitive resistor can be used directly with an analog switch (e.g., placed below a digital switch, etc.), and the resistance of the force-sensitive resistor can be measured substantially continuously. When the first digital switch is closed, the slope of the force-sensitive resistor changes, and a controller, firmware, etc. can interpret the changing slope of the resistance to determine the degree of activation of the analog switch.

[0047] Combining digital and analog switching elements into a thin-film design can reduce keyboard cost, reduce keyboard complexity, increase reliability, and enable a smaller physical package that takes up less space. Keyboards can have signal lines buried within the power plane to improve immunity to electromagnetic interference.

[0048] In some embodiments, a thin film digital analog switch can include a safety design process that helps achieve (e.g., ensure) Performance Level D by utilizing a dual channel and time domain architecture. For example, redundancy can be used to reduce (e.g., prevent) the possibility of a fault that disrupts both channels by taking measurements of the first and second phases at different points in time (e.g., sequentially) and determining that the other phase is not currently active.

[0049] In an example embodiment, a membrane digital analog switch includes: an input button surface adapted to receive input pressure from a user; and a digital switch located below the input button surface for generating a digital switch activation signal when the pressure received on the input button surface is greater than or equal to a specified digital pressure threshold.

[0050] The membrane digital analog switch further includes an analog switch adapted to generate an analog switch activation signal when a pressure received on the input button surface is greater than or equal to a specified analog pressure threshold. The specified analog pressure threshold is greater than a specified digital pressure threshold. The digital switch activation signal is a binary digital signal, and the analog switch activation signal is variable and corresponds to an analog sensed value of the pressure received on the input button surface.

[0051] The analog switch may include a force-sensitive resistor, and the force-sensitive resistor may have a nonlinear resistance characteristic, wherein as pressure on the input button surface increases, the resistance of the force-sensitive resistor decreases nonlinearly. The thin film digital analog switch may include a controller configured to measure the analog switch activation signal and determine the input pressure received on the input button surface based on the measured analog switch activation signal.

[0052] For example, the controller may be configured to determine a change in the slope of the analog switch activation signal and compare the change in slope to a non-linear resistance characteristic of the force sensitive resistor to determine the input pressure received on the input button surface.

[0053] In some embodiments, an analog switch including a force-sensitive resistor is positioned below a digital switch relative to an input button surface. The digital switch may be a first digital switch, and the thin film digital analog switch may further include a second digital switch positioned below the first digital switch relative to the input button surface. The analog switch including the force-sensitive resistor may be coupled in series with the second digital switch.

[0054] The controller may be configured to detect a second digital switch activation signal when the second digital switch is closed, and in response to detecting the second digital switch activation signal, measure an initial resistance of the force-sensitive resistor. The controller may set the measured initial resistance as a calibration value for measuring an analog force-sensitive resistor signal corresponding to the resistance of the force-sensitive resistor to determine an input pressure received on the input button surface.

[0055] In some embodiments, the input button surface and the digital switch define a tactile switch including a metal dome, and the input button surface includes a cover layer that contacts a first side of the metal dome. A second side of the metal dome, opposite the first side, is positioned to contact an electrical conductor of the digital switch in response to pressure received on the cover layer that contacts the first side of the metal dome.

[0056] Alternatively, the input button surface and the digital switch may define a non-tactile switch including a conductive pad, wherein the input button surface includes a cover layer in contact with a first side of the conductive pad, and a second side of the conductive pad, opposite the first side, is positioned to contact an electrical conductor of the digital switch in response to pressure received on the cover layer in contact with the first side of the conductive pad.

[0057] The controller may be configured to determine an explicit start step in response to receiving the digital switch activation signal, and in response to determining the explicit start step, implement one or more analog functions according to the received analog switch activation signal. For example, the one or more analog functions may include controlling the speed or flow rate of a machine, controlling the speed of a crane or vehicle, controlling the flow rate of a concrete pump or a high-pressure washer, etc.

[0058] With reference to the accompanying drawings, Figure 1 An example membrane digital analog switch 100 according to some aspects of the present disclosure is shown. The membrane digital analog switch 100 includes: an input button surface 102 adapted to receive input pressure from a user; and a digital switch 104 located below the input button surface 102, configured to generate a digital switch activation signal when the pressure received on the input button surface 102 is greater than or equal to a specified digital pressure threshold.

[0059] The membrane digital analog switch 100 further includes an analog switch 106 adapted to generate an analog switch activation signal when the pressure received on the input button surface 102 is greater than or equal to a specified analog pressure threshold. The specified analog pressure threshold is greater than a specified digital pressure threshold. The digital switch activation signal is a binary digital signal, and the analog switch activation signal is variable and corresponds to an analog sensed value of the pressure received on the input button surface 102.

[0060] The analog switch 106 includes a force sensitive resistor (FSR) 108. The FSR 108 may have a non-linear resistance characteristic, wherein the resistance of the FSR 108 decreases non-linearly as pressure on the input button surface increases.

[0061] For example, the force-sensitive resistor 108 may comprise a conductive polymer that changes resistance in a predictable manner after a force is applied to its surface. The force-sensitive resistor 108 may comprise a polymer sheet or ink that may be applied by screen printing.

[0062] The sensing film can include conductive and non-conductive particles suspended in a matrix, and the particles can be submicron in size. Applying force to the surface of the sensing film causes the particles to contact the conductive electrodes, thereby changing the resistance of the film. FSRs can have thicknesses of less than 0.5 mm, low cost, good impact resistance, etc. However, some FSRs may have low accuracy (e.g., measurements may vary by 10% or more, etc.).

[0063] like Figure 1 As shown, the membrane digital analog switch 100 may include an optional controller 110 configured to measure the analog switch activation signal and determine an input pressure received on the input button surface based on the measured analog switch activation signal.

[0064] For example, the controller 110 may be configured to determine a change in the slope of the analog switch activation signal and compare the change in slope to a non-linear resistance characteristic of the force sensitive resistor to determine the input pressure received on the input button surface 102 .

[0065] like Figure 1 As shown, the analog switch 106 including the force-sensitive resistor 108 is located below the digital switch 104 relative to the input button surface 102. For example, the input button surface 102 can receive actuation force from the user and can include a rubber membrane, a cover, etc. The digital switch 104 can include a C-plus-inner-circle switch structure, a metal dome located on top of the C-plus-inner-circle component, etc.

[0066] In another embodiment, Figure 2 As shown, the digital switch may be a first digital switch 204 , and the membrane digital analog switch 200 may further include a second digital switch 212 located below the first digital switch 204 relative to the input button surface 202 .

[0067] exist Figure 2In the illustrated thin film digital analog switch 200, an analog switch 206 including a force sensitive resistor 208 is coupled in series with a second digital switch 212. In this case, the optional controller 210 can be configured to detect a second digital switch activation signal when the second digital switch 212 is closed.

[0068] In response to detecting the second digital switch activation signal, the controller 210 can measure the initial resistance of the force-sensitive resistor 208. The controller 210 can set the measured initial resistance as a calibration value for measuring an analog force-sensitive resistor signal corresponding to the resistance of the force-sensitive resistor 208 to determine the input pressure received on the input button surface 202.

[0069] For example, the force sensitive resistor 208 may have nonlinear characteristics, may have low repeatability, etc. The force sensitive resistor 208 may have an initial high resistance value, and the resistance value may drop rapidly as the pressure initially increases, and then the resistance value may change more slowly as the pressure continues to increase.

[0070] like Figure 2 As shown in the exemplary embodiment of FIG, when the force-sensitive resistor 208 is connected in series with the second digital switch 212, the starting point of user engagement of the force-sensitive resistor 208 is clear. When the second digital switch 212 is closed, the initial resistance value can be measured, and the remaining resistance value slope of the force-sensitive resistor 208 can be calibrated based on the measured initial resistance value.

[0071] The membrane digital analog switches 100 and 200 may be included in any suitable keyboard, user input device, etc. For example, Figure 3 and Figure 4 Keyboards 300 and 400 including membrane digital analog switches 100 and 200 are shown, respectively.

[0072] like Figure 3 As shown, keyboard 300 includes two membrane digital analog switches 100, each of which includes an input button surface 102. Initial pressure on the input button surface activates digital switch 104, while further pressure on input button surface 102 activates the analog switch by changing the resistance of force sensitive resistor 108.

[0073] Figure 4 A keyboard 400 is shown that includes two membrane digital analog switches 200, each of which includes an input button surface 202. Initial pressure on the input button surface activates a first digital switch 204, while further pressure on the input button surface 202 activates the analog switch by first contacting a second digital switch 212 and then changing the resistance of a force-sensitive resistor 208. The force-sensitive resistor 208 is connected in series with the second digital switch 212.

[0074] Although Figure 3 and Figure 4 Keypads 300 and 400 are shown, but other embodiments may include any suitable membrane switch configuration, layout, etc. For example, a membrane digital analog switch may have an elongated form factor, a sealed outer layer (e.g., to prevent dust or water ingress), etc. One or more flexible layers (e.g., polyester, etc.) may be stacked together and enable a user to press the top of the flexible layer to activate a button, etc.

[0075] Membrane digital analog switches can include tactile switches, non-tactile switches, etc. For example, Figure 5 A tactile switch 500 is shown including a cover layer 502 (eg, an input button surface). Conductive traces 514 are located on a circuit substrate 516.

[0076] Metal dome 518 is located between cover layer 502 and conductive trace 514. When a user presses down on cover layer 502, metal dome 518 collapses so as to contact conductive trace 514. The circuit is closed by the contact between metal dome 518 and conductive trace 514, which can generate a digital activation signal, etc.

[0077] The user can feel the collapse of the metal dome 518 to provide tactile feedback, and when the user releases the pressure, the metal dome 518 can rebound to its original position. The force-sensitive resistor can be placed under the metal dome 518, under the conductive trace 514, under the substrate 516, etc.

[0078] Figure 6 6 shows a non-tactile switch 600. Non-tactile switch 600 includes a cover layer 602 and a conductive trace 614 located on a substrate 616. A conductive pad 620 is located between cover layer 602 and conductive trace 614. When a user presses down on cover layer 602, conductive pad 620 contacts conductive trace 614. The contact between conductive pad 620 and conductive trace 614 closes the circuit, which can generate a digital activation signal, etc.

[0079] and Figure 5 Compared to the tactile switch 500 shown, Figure 6 The non-tactile switch 600 shown in FIG may not provide tactile feedback to the user when the switch 600 is closed because the switch 600 does not include a collapsed metal dome, etc. The force sensitive resistor may be placed under the conductive pad 620, under the conductive trace 614, under the substrate 616, etc.

[0080] As described herein, the controller of an embodiment may include a microprocessor, a microcontroller, an integrated circuit, a digital signal processor, etc., which may include memory. The controller may be configured to perform (e.g., be operable to perform, etc.) any of the example processes described herein using any suitable hardware and / or software implementation. For example, the controller may execute computer-executable instructions stored in memory and may include one or more logic gates, control circuits, etc.

[0081] According to another example embodiment, a method of operating a membrane digital analog switch is disclosed, the membrane digital analog switch including an input button surface, a digital switch, and an analog switch. The method includes receiving an input pressure from a user at the input button surface.

[0082] The method also includes: generating a digital switch activation signal by the digital switch when the pressure received on the input button surface is greater than or equal to a specified digital pressure threshold; and generating an analog switch activation signal by the analog switch when the pressure received on the input button surface is greater than or equal to a specified analog pressure threshold.

[0083] The specified analog pressure threshold is greater than the specified digital analog pressure threshold, the digital switch activation signal is a binary digital signal, and the analog switch activation signal is variable and corresponds to an analog sensed value of pressure received on the input button surface.

[0084] The method may include implementing one or more analog functions of the machine in accordance with the analog switch activation signal only after the digital switch activation signal is generated. In some embodiments, the analog switch includes a force sensitive resistor and is located below the digital switch relative to the input button surface.

[0085] The digital switch may be a first digital switch, with a second digital switch positioned below the first digital switch relative to the input button surface. The analog switch may include a force sensitive resistor, and the analog switch including the force sensitive resistor may be coupled in series with the second digital switch.

[0086] Exemplary embodiments are provided to make this disclosure thorough and to fully convey the scope of protection to those skilled in the art. Many specific details are set forth, such as examples of specific components, devices, and methods, to provide a thorough understanding of the embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that exemplary embodiments may be implemented in many different forms, and that neither should be construed as limiting the scope of the present disclosure. In some exemplary embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail. In addition, the advantages and improvements that may be achieved by one or more exemplary embodiments of the present disclosure are provided for illustrative purposes only and are not intended to limit the scope of the present disclosure, as the exemplary embodiments disclosed herein may provide all or none of the above-mentioned advantages and improvements and still fall within the scope of the present disclosure.

[0087] Specific size, specific material and / or specific shape disclosed herein are exemplary in nature and do not limit the scope of the present disclosure.Specific numerical value and specific numerical range of given parameter disclosed herein do not exclude other numerical value and numerical range that can be useful in one or more examples disclosed herein.In addition, it is contemplated that any two specific values ​​of specific parameter described herein can define the endpoint (that is, the disclosure of the first value and the second value of given parameter can be interpreted as disclosing any value between the first and second values ​​and can also be used for given parameter) of the numerical range that can be suitable for given parameter.For example, if parameter X is illustrated as having value A and also illustrated as having value Z in this article, it is contemplated that parameter X can have the numerical range from about A to about Z.Similarly, it is contemplated that two or more numerical ranges (no matter these ranges are nested, overlapping or different) of disclosed parameters comprise all possible combinations of the numerical range that may be declared using the endpoint of disclosed range. For example, if parameter X is illustrated herein as having a value within the range of 1-10, or 2-9, or 3-8, it is also contemplated that parameter X may have other value ranges including 1-9, 1-8, 1-3, 1-2, 2-10, 2-8, 2-3, 3-10, and 3-9.

[0088] When applied to numerical values, the term "approximately" means that the calculation or measurement allows for some slight imprecision in the value (there is some way to arrive at the value's exactness; approximately or reasonably close to the value; roughly). If, for some reason, the imprecision provided by "approximately" is not otherwise understood in the art according to its ordinary meaning, then "approximately" as used herein means at least the variation that may result from ordinary methods of measuring or using such parameters. For example, the terms "substantially," "approximately," and "substantially" may be used herein to mean within manufacturing tolerances.

[0089] The terms used herein are intended only to describe the purpose of specific exemplary embodiments and are not intended to be limiting. For example, when phrases such as "may include," "may include," etc. are permitted, when used herein, at least one embodiment includes or comprises features. As used herein, the singular forms "a," "an," and "the" may also include plural forms unless the context clearly indicates otherwise. The terms "comprise," "contain," "include," and "have" are inclusive and therefore specify the presence of the proposed features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups thereof. Unless the order of execution is specifically noted, the method steps, processes, and operations described herein should not be interpreted as necessarily requiring them to be performed in the specific order discussed or described. It should also be understood that additional or alternative steps may be adopted.

[0090] When an element or layer is referred to as being "on," "engaged to," "connected to," or "coupled to" another element or layer, it may be directly on, directly engaged, connected, or coupled to, the other element or layer, or there may be intervening elements or layers. Conversely, when the relationship between an element and another element or layer is referred to as being "directly on," "directly engaged to," "directly connected to," or "directly coupled to," there may be no intervening elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0091] Although the terms first, second, third etc. can be used herein to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms may only be used to distinguish an element, component, region, layer or part from another region, layer or part. Unless the context clearly indicates, otherwise when used in this article, terms such as "first", "second" and other numerical terms do not imply sequence or order. Therefore, without departing from the teachings of exemplary embodiments, the first element, component, region, layer or part discussed below can be referred to as the second element, component, region, layer or part.

[0092] The foregoing introduction of the embodiments has been provided for the purpose of illustration and description. This introduction is not intended to be exhaustive or limit the present disclosure. The individual elements, intended or declared uses or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, may be interchangeable and may be used in selected embodiments even if not specifically shown or described. The individual elements, intended or declared uses or features of the above-mentioned particular embodiments may also vary in many ways. These variations should not be considered as departing from the present disclosure, and all such modifications are intended to be included within the scope of the present disclosure.

Claims

1. A switch, characterized in that: include: an input button surface adapted to receive input pressure from a user; a digital switch adapted to generate a digital switch activation signal when a pressure received on the surface of the input button is greater than or equal to a specified digital pressure threshold; an analog switch adapted to generate an analog switch activation signal when a pressure received on the surface of the input button is greater than or equal to a specified analog pressure threshold; wherein the specified analog pressure threshold is greater than the specified digital pressure threshold; the analog switch includes a force-sensitive resistor, the force-sensitive resistor including a non-linear resistance characteristic, wherein the resistance of the force-sensitive resistor decreases non-linearly as pressure on the input button surface increases; and A controller is configured to measure the analog switch activation signal and determine the input pressure received on the input button surface based on the measured analog switch activation signal; the controller is also configured to determine a change in the slope of the analog switch activation signal and compare the change in the slope with the nonlinear resistance characteristic of the force-sensitive resistor to determine the input pressure received on the input button surface.

2. The switch according to claim 1, wherein: The digital switch activation signal is a binary digital signal.

3. The switch according to claim 1 or 2, characterized in that: The analog switch activation signal is variable and corresponds to an analog sense of pressure received on the input button surface.

4. The switch according to claim 1 or 2, characterized in that: The digital switch is located below the input button surface.

5. The switch according to claim 1 or 2, characterized in that: The controller is further configured to: In response to receiving the digital switch activation signal, determining a clear start step; and In response to determining the explicit start step, one or more analog functions are implemented according to the received analog switch activation signal.

6. The switch according to claim 5, characterized in that The one or more simulated functions include controlling the speed or flow rate of the machine.

7. The switch according to claim 5, characterized in that The one or more simulated functions include controlling the speed of a crane or vehicle.

8. The switch according to claim 5, characterized in that The one or more simulated functions include controlling the flow rate of a concrete pump or a high pressure washer.

9. The switch according to claim 1, wherein: The digital switch is a first digital switch; The switch further includes a controller and a second digital switch; The second digital switch is located below the first digital switch relative to the input button surface; an analog switch including a force sensitive resistor coupled in series with the second digital switch; and The controller is configured to: detecting a second digital switch activation signal when the second digital switch is closed; measuring an initial resistance of the force sensitive resistor in response to detecting the second digital switch activation signal; and The measured initial resistance is set as a calibration value that is used to measure an analog force-sensitive resistor signal corresponding to the resistance of the force-sensitive resistor to determine an input pressure received on the input button surface.

10. The switch according to claim 1 or 2, characterized in that: The analog switch is located below the digital switch relative to the input button surface.

11. The switch according to claim 1 or 2, characterized in that: The digital switch is a first digital switch; The switch further includes a second digital switch positioned below the first digital switch relative to the input button surface; and The analog switch is coupled in series with the second digital switch.

12. The switch according to claim 1 or 2, characterized in that: The input button surface and the digital switch define a tactile switch comprising a metal dome; The input button surface includes a covering layer, the covering layer contacting a first side of the metal dome; and A second side of the metal dome, opposite the first side, is positioned to contact an electrical conductor of the digital switch in response to pressure received on the cover layer in contact with the first side of the metal dome.

13. The switch according to claim 1 or 2, characterized in that: The input button surface and the digital switch define a non-tactile switch including a conductive pad; The input button surface includes a cover layer, the cover layer contacting the first side of the conductive pad; and A second side of the conductive pad, opposite the first side, is positioned to contact an electrical conductor of the digital switch in response to pressure received on the cover layer in contact with the first side of the conductive pad.

14. The switch according to claim 1 or 2, characterized in that: The input button surface and the numeric switch define a rocker switch.

15. The switch according to claim 1 or 2, characterized in that: The switch is a thin film digital analog switch.

16. A keyboard, characterized in that: Comprising at least one switch according to claim 1 or 2.

17. A keyboard, characterized in that: The device comprises a plurality of switches according to claim 1 or 2.

18. A method for operating a switch, characterized in that: The switch includes an input button surface, a digital switch, and an analog switch, and the method includes: receiving input pressure from a user at the input button surface; generating a digital switch activation signal when the pressure received by the digital switch on the input button surface is greater than or equal to a specified digital pressure threshold; generating an analog switch activation signal when a pressure received by the analog switch on the input button surface is greater than or equal to a specified analog pressure threshold; wherein the specified analog pressure threshold is greater than the specified digital analog pressure threshold; the analog switch includes a force sensitive resistor, the force sensitive resistor including a nonlinear resistance characteristic, wherein a resistance of the force sensitive resistor decreases nonlinearly as pressure on the input button surface increases; and The analog switch activation signal is measured, and the input pressure received on the input button surface is determined based on the measured analog switch activation signal; a change in the slope of the analog switch activation signal is determined, and the change in the slope is compared with the nonlinear resistance characteristic of the force-sensitive resistor to determine the input pressure received on the input button surface.

19. The method according to claim 18, characterized in that The digital switch activation signal is a binary digital signal.

20. The method according to claim 18 or 19, characterized in that The analog switch activation signal is variable and corresponds to an analog sense of pressure received on the input button surface.

21. The method according to claim 18 or 19, characterized in that: the digital switch being a first digital switch, the switch further comprising a second digital switch positioned below the first digital switch relative to the input button surface, and the analog switch being coupled in series with the second digital switch; and The method further includes: detecting a second digital switch activation signal when the second digital switch is closed; In response to detecting the second digital switch activation signal, measuring an initial resistance of the force sensitive resistor; and The measured initial resistance is set as a calibration value used to measure an analog force-sensitive resistor signal corresponding to the resistance of the force-sensitive resistor to determine an input pressure received on the input button surface.

22. The method according to claim 18 or 19, characterized in that: The digital switch is a first digital switch; The switch further includes a second digital switch positioned below the first digital switch relative to the input button surface; and The analog switch is coupled in series with the second digital switch.

23. The method according to claim 18 or 19, characterized in that The analog switch is located below the digital switch relative to the input button surface.

24. The method according to claim 18 or 19, characterized in that: The input button surface and the digital switch define a tactile switch comprising a metal dome; The input button surface includes a covering layer, the covering layer contacting a first side of the metal dome; and A second side of the metal dome, opposite the first side, is positioned to contact an electrical conductor of the digital switch in response to pressure received on the cover layer in contact with the first side of the metal dome.

25. The method according to claim 18 or 19, characterized in that: The input button surface and the digital switch define a non-tactile switch including a conductive pad; The input button surface includes a cover layer, the cover layer contacting the first side of the conductive pad; and A second side of the conductive pad, opposite the first side, is positioned to contact an electrical conductor of the digital switch in response to pressure received on the cover layer in contact with the first side of the conductive pad.

26. The method according to claim 18 or 19, characterized in that The input button surface and the numeric switch define a rocker switch.

27. The method according to claim 18 or 19, characterized in that Also includes: In response to receiving the digital switch activation signal, determining a clear start step; and In response to determining the explicit start step, one or more analog functions are implemented according to the received analog switch activation signal.

28. The method according to claim 18 or 19, characterized in that Also included is implementing one or more analog functions of the machine in accordance with the analog switch activation signal only after generating the digital switch activation signal.

29. The method according to claim 28, characterized in that The one or more simulated functions include controlling the speed or flow rate of the machine.

30. The method according to claim 28, wherein The one or more simulated functions include controlling the speed of a crane or vehicle.

31. The method according to claim 28, wherein The one or more simulated functions include controlling the flow of a concrete pump or a high pressure washer.

32. The method according to claim 18 or 19, characterized in that The switch is a thin film digital analog switch.

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