Key wake-up circuit and device and keyboard

Abstract

The utility model discloses a key awakening circuit, which is characterized in that when a control module in a dormant state needs to be awakened, an awakening key is pressed down, so that the magnetic field intensity of a Hall awakening module is changed, and the first voltage output by the Hall awakening module is changed; when the downward pressing reaches the preset amplitude, the first voltage is larger than the preset voltage, at the moment, the comparison module outputs a preset level signal to the control module, and the control module is switched to an awakening state when receiving the preset level signal. The Hall wake-up module is independent of the original key group, so that when the original key group is powered off due to the fact that the control module is in the dormant state, the Hall wake-up module can work to respond to the operation that the wake-up key is pressed down to wake up the control module, and the overall power consumption can be reduced when the control module is in the dormant state for a long time.

Description

Technical Field

[0001] This application belongs to the field of electronic circuit technology, and in particular relates to a key wake-up circuit, device and keyboard. Background Technology

[0002] The signal of a magnetic axis keyboard is a voltage value that varies within a certain range. The microcontroller chip needs to continuously collect and process the signal to realize the key function. When the microcontroller chip enters power saving mode, it cannot be woken up by pressing a key. Therefore, the microcontroller chip cannot enter power saving mode, causing the keyboard to always be in high power mode, resulting in high overall power consumption. Utility Model Content

[0003] The purpose of this application is to provide a key wake-up circuit, which aims to solve the problem of excessive power consumption in current keyboards that require a microcontroller chip to continuously collect and process data to realize key functions.

[0004] A first aspect of this application provides a button wake-up circuit, including:

[0005] A Hall effect wake-up module is configured on a preset wake-up button to output a first voltage, which varies with the amount of pressure applied to the wake-up button.

[0006] The comparison module, electrically connected to the Hall wake-up module, is used to output a preset level signal when the first voltage is greater than a preset voltage; and

[0007] The control module is electrically connected to the comparison module and switches to the wake-up state when it is in sleep mode and the preset level signal is input.

[0008] In one embodiment, the Hall wake-up module includes a Hall element and a base, the Hall element being disposed on the base; the base being disposed on one side of the wake-up button;

[0009] The Hall element is used to change the first voltage according to the distance between the shaft of the wake-up button and the base.

[0010] In one embodiment, the Hall element includes a Hall switch;

[0011] The power supply terminal of the Hall switch is connected to a voltage power supply, the ground terminal of the Hall switch is connected to the power supply ground, and the output terminal of the Hall switch is used to output the first voltage.

[0012] In one embodiment, the Hall switch is a linear Hall switch.

[0013] In one embodiment, the Hall wake-up module is a programmable Hall effect sensor; the programmable Hall effect sensor and the wake-up button are encapsulated in the same button.

[0014] In one embodiment, the comparison module includes a first comparator, a first resistor, a third resistor, a seventh resistor, and a first capacitor;

[0015] The inverting input terminal of the first comparator is used to input the first voltage. The non-inverting input terminal of the first comparator, the first terminal of the first resistor, and the first terminal of the seventh resistor are all connected together. The power supply terminal of the first comparator, the first terminal of the third resistor, the first terminal of the first capacitor, and the second terminal of the first resistor are all connected to the voltage power supply. The second terminal of the first capacitor, the ground terminal of the first comparator, and the second terminal of the seventh resistor are all connected to the power supply ground. The output terminal of the first comparator and the second terminal of the third resistor are all connected together and used to output the preset level signal.

[0016] In one embodiment, the comparison module includes a comparison chip, a fifth capacitor, and a sixth resistor;

[0017] The input terminal of the comparator chip and the first terminal of the fifth capacitor are connected together and used to input the first voltage. The ground terminal of the comparator chip and the second terminal of the fifth capacitor are both connected to the power supply ground. The output terminal of the comparator chip is connected to the first terminal of the sixth resistor, and the second terminal of the sixth resistor is used to output the high-level voltage.

[0018] In one embodiment, the control module includes a control chip;

[0019] The power supply terminal of the control chip is connected to a voltage power supply, the ground terminal of the control chip is connected to the power supply ground, and the wake-up terminal of the control chip is used to input the high-level voltage.

[0020] A second aspect of this application provides a button wake-up device, including a button wake-up circuit as described in any of the first aspects.

[0021] A third aspect of this application provides a keyboard, including a key wake-up circuit as described in any of the first aspects.

[0022] In one embodiment, the system further includes an RGB module and a linear Hall power supply; the control module is electrically connected to the RGB module and the linear Hall power supply respectively, and is used to control the RGB module and the linear Hall power supply to power on and operate when the system is in a wake-up state.

[0023] The beneficial effects of this utility model embodiment compared with the prior art are as follows: This solution, when the control module in a sleep state needs to be woken up, presses down the wake-up button, changing the magnetic field strength of the Hall wake-up module, thereby changing the first voltage output by the Hall wake-up module. When the pressure reaches a preset amplitude, the first voltage is greater than the preset voltage. At this time, the comparison module outputs a preset level signal to the control module, and the control module switches to the wake-up state upon receiving the preset level signal. When the control module is in a sleep state, the original button group, including the wake-up button, can be in a power-off state, resulting in very low overall power consumption. Because the Hall wake-up module is independent of the original button group, when the original button group is powered off due to the control module being in a sleep state, the Hall wake-up module can still work, responding to the press of the wake-up button to wake up the control module. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the key wake-up circuit provided in an embodiment of this application.

[0025] Figure 2 A first circuit schematic diagram of the Hall wake-up module and the comparison module provided in the embodiments of this application;

[0026] Figure 3 The second circuit schematic diagram of the Hall wake-up module and the comparison module provided in the embodiments of this application;

[0027] Figure 4 The circuit schematic diagram of the control module provided in the embodiment of this application. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0029] Figure 1 The diagram shows a first example of the key-activated wake-up circuit provided in this embodiment. For ease of explanation, only the parts relevant to this embodiment are shown, and are described in detail below:

[0030] A button wake-up circuit includes a Hall effect wake-up module 110, a comparison module 120, and a control module 130.

[0031] Hall effect wake-up module 110 is configured on a preset wake-up button and is used to output a first voltage, which varies with the downward pressure of the wake-up button.

[0032] The comparison module 120, electrically connected to the Hall wake-up module 110, is used to output a preset level signal when the first voltage is greater than a preset voltage. If the comparison module 120 normally outputs a low level, the preset level signal is a high level signal; if the comparison module 120 normally outputs a high level, the preset level signal is a low level signal.

[0033] The control module 130 is electrically connected to the comparison module 120, and switches to the wake-up state when it is in a sleep state and the preset level signal is input.

[0034] In this embodiment, when the control module 130, which is in a sleep state, needs to be woken up, the wake-up button is pressed down, changing the magnetic field strength of the Hall wake-up module 110, thereby changing the first voltage output by the Hall wake-up module 110. When the pressure reaches a preset amplitude, the first voltage is greater than the preset voltage. At this time, the comparison module 120 outputs a preset level signal to the control module 130, and the control module 130 switches to the wake-up state upon receiving the preset level signal. When the control module 130 is in a sleep state, the original button group, including the wake-up button, can be in a power-off state, resulting in very low overall power consumption. Because the Hall wake-up module 110 is independent of the original button group, when the original button group is powered off due to the control module 130 being in a sleep state, the Hall wake-up module 110 can still work to respond to the operation of pressing the wake-up button to wake up the control module 130.

[0035] In one embodiment, the wake-up button is a Hall effect button.

[0036] The number of Hall wake-up modules 110 is at least one, and can be multiple; when there are multiple Hall wake-up modules 110, there are also multiple corresponding preset wake-up buttons. The specific preset wake-up button selection is set by the technician according to actual needs.

[0037] In one embodiment, the Hall wake-up module 110 includes a Hall element and a base, the Hall element being disposed on the base; the base being disposed on one side of the wake-up button;

[0038] The Hall element is used to change the first voltage based on the distance between the shaft of the wake-up button and the base. The shaft of the wake-up button changes distance when it is pressed, and the distance between the Hall element and the base also changes. This causes a change in the magnetic field of the permanent magnet in the Hall element, resulting in a change in the first voltage output by the Hall element. When the first voltage is greater than a preset voltage set by the comparison module 120, the comparison module 120 outputs a preset level signal. Upon receiving the preset level signal, the control module 130 switches to the wake-up state, restoring the settings of the wake-up state, such as enabling RGB, linear Hall power, and / or sending RGB lighting data.

[0039] In one embodiment, the Hall element includes a Hall switch HU;

[0040] The power supply terminal of the Hall switch HU is connected to a voltage power supply, the ground terminal of the Hall switch HU is connected to the power supply ground, and the output terminal of the Hall switch HU is used to output the first voltage.

[0041] In one embodiment, the Hall switch HU is a linear Hall switch HU.

[0042] In one embodiment, the Hall wake-up module is a programmable Hall effect sensor; the programmable Hall effect sensor and the wake-up button are encapsulated in the same button, and the programmable Hall effect sensor becomes a linear Hall effect sensor.

[0043] In one embodiment, the comparison module 120 includes a first comparator U3A, a first resistor R1, a third resistor R3, a seventh resistor R7, and a first capacitor C1.

[0044] The inverting input terminal of the first comparator U3A is used to input the first voltage. The non-inverting input terminal of the first comparator U3A, the first terminal of the first resistor R1, and the first terminal of the seventh resistor R7 are all connected together. The power supply terminal of the first comparator U3A, the first terminal of the third resistor R3, the first terminal of the first capacitor C1, and the second terminal of the first resistor R1 are all connected to the voltage power supply. The second terminal of the first capacitor C1, the ground terminal of the first comparator U3A, and the second terminal of the seventh resistor R7 are all connected to the power supply ground. The output terminal of the first comparator U3A and the second terminal of the third resistor R3 are connected together and used to output the preset level signal.

[0045] In one specific embodiment, the non-inverting input of the first comparator U3A is a fixed voltage, such as 1.5V, after a 3.3V voltage divider. The inverting input of the first comparator U3A is a variable voltage (depending on the level signal output by the linear Hall switch HU), depending on the pressing depth of the shaft. For example, it is 2.0V when at rest and 1.3V when pressed to the lowest point. Then, when the wake-up button is pressed, the first comparator U3A changes from a low level to a high level, which can serve as the wake-up source for the control module 130.

[0046] In one embodiment, the comparison module 120 includes a comparison chip U7, a fifth capacitor C5, and a sixth resistor R6;

[0047] The input terminal of the comparator chip and the first terminal of the fifth capacitor C5 are connected together and used to input the first voltage. The ground terminal of the comparator chip and the second terminal of the fifth capacitor C5 are both connected to the power supply ground. The output terminal of the comparator chip is connected to the first terminal of the sixth resistor R6, and the second terminal of the sixth resistor R6 is used to output the high-level voltage.

[0048] In one embodiment, the control module 130 includes a control chip U5;

[0049] The power supply terminal of the control chip U5 is connected to the voltage power supply, the ground terminal of the control chip U5 is connected to the power ground, and the wake-up terminal of the control chip U5 is used to input the high-level voltage.

[0050] In one specific embodiment, the control chip U5 can be a high-precision voltage detector, such as CE8808N15M; the detection voltage is fixed inside, and the level signal output by the linear Hall element is connected to the detector input pin. When the voltage of the input pin is higher or lower than the internal fixed detection voltage, the output pin will have a high or low level change, which can be used as a device wake-up source.

[0051] This application also provides a button wake-up device, including the button wake-up circuit described in any of the above claims. Because the button wake-up device of this embodiment includes the button wake-up circuit described in any of the above claims, it enjoys the beneficial effects corresponding to the button wake-up circuit described in any of the above claims.

[0052] This application also provides a keyboard, including the key wake-up circuit described in any of the above-mentioned embodiments. Because the keyboard in this embodiment includes the key wake-up circuit described in any of the above-mentioned embodiments, it enjoys the same beneficial effects. Furthermore, the key wake-up circuit in this embodiment does not reduce the original keyboard functionality and offers significant advantages for the overall keyboard device's sleep / standby time. Sleep power consumption is often much lower than that of traditional keyboards, enabling the keyboard device to truly meet the requirements for ultra-long standby time while also improving battery life.

[0053] In one embodiment, it further includes an RGB module and a linear Hall power supply; the control module 130 is electrically connected to the RGB module and the linear Hall power supply respectively, and is used to control the RGB module and the linear Hall power supply to power on and work when in a wake-up state.

[0054] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A key wake-up circuit, characterized by, The application relates to a key wake-up circuit. The key wake-up circuit comprises a Hall wake-up module, a comparison module and a control module. The Hall wake-up module is arranged at a preset wake-up key and is used for outputting a first voltage which changes with the pressing amplitude of the wake-up key. The comparison module is electrically connected with the Hall wake-up module and is used for outputting a preset level signal when the first voltage is greater than a preset voltage. The control module is electrically connected with the comparison module and is switched to a wake-up state when in a sleep state and the preset level signal is input.

2. The key wake-up circuit of claim 1, wherein, The Hall wake-up module comprises a Hall element and a base, the Hall element is arranged on the base, and the base is arranged on one side of the wake-up key. The Hall element is used for changing the first voltage according to the distance between the shaft body of the wake-up key and the base.

3. The key wake-up circuit of claim 2, wherein, The Hall element comprises a Hall switch. The power supply end of the Hall switch is connected with a voltage power supply, the grounding end of the Hall switch is connected with a power supply ground, and the output end of the Hall switch is used for outputting the first voltage.

4. The key wake-up circuit of claim 1, wherein, The Hall wake-up module is a programmable Hall, and the programmable Hall and the wake-up key are sealed in the same key.

5. The key wake-up circuit of claim 1, wherein, The comparison module comprises a first comparator, a first resistor, a third resistor, a seventh resistor and a first capacitor. The inverting input end of the first comparator is used for inputting the first voltage, the non-inverting input end of the first comparator, the first end of the first resistor and the first end of the seventh resistor are commonly connected, the power supply end of the first comparator, the first end of the third resistor, the first end of the first capacitor and the second end of the first resistor are all connected with a voltage power supply, the second end of the first capacitor, the grounding end of the first comparator and the second end of the seventh resistor are all connected with a power supply ground, and the output end of the first comparator and the second end of the third resistor are commonly connected and are used for outputting the preset level signal.

6. The key wake-up circuit of claim 1, wherein, The comparison module comprises a comparison chip, a fifth capacitor and a sixth resistor. The input end of the comparison chip and the first end of the fifth capacitor are commonly connected and are used for inputting the first voltage, the grounding end of the comparison chip and the second end of the fifth capacitor are all connected with a power supply ground, the output end of the comparison chip is connected with the first end of the sixth resistor, and the second end of the sixth resistor is used for outputting the preset level signal.

7. The key wake-up circuit of claim 1, wherein, The control module comprises a control chip. The power supply end of the control chip is connected with a voltage power supply, the grounding end of the control chip is connected with a power supply ground, and the wake-up end of the control chip is used for inputting the preset level signal.

8. A key wake-up device, characterized by The application further comprises an RGB module and a linear Hall power supply, the control module is electrically connected with the RGB module and the linear Hall power supply respectively, and is used for controlling the RGB module and the linear Hall power supply to work when in a wake-up state.

9. A keyboard, characterized in that ​ 10. The keyboard of claim 9, wherein, ​

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