Solid-state button function implementation circuit and terminal

Abstract

Embodiments of the present disclosure provide a solid-state button function implementation circuit and a terminal. The solid-state button function implementation circuit comprises a touch panel, a power supply module, a signal gain module, a signal decision module, and an execution module. A first sensing assembly is provided on the touch panel. The power supply module continuously supplies power to the touch panel, the signal gain module, the signal decision module and the execution module in various states of the terminal. The first sensing assembly detects a first control operation and generates a first control signal. The signal gain module amplifies the first control signal to generate a gain signal. The signal decision module compares the gain signal with a threshold signal to generate a comparison result signal. The execution module maintains or modifies the current terminal state on the basis of the comparison result signal.

Description

A solid-state key function realizing circuit and terminal

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202410381330.3 filed with the China Patent Office on March 28, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to, but is not limited to, the field of terminal control. Background Art

[0004] Currently, mobile terminal power buttons are implemented using traditional mechanical buttons, which require basic waterproofing and take up a lot of space. Major mobile terminal manufacturers are considering introducing new technologies to replace traditional mechanical buttons. Summary of the Invention

[0005] Embodiments of the present disclosure provide a solid-state key function implementation circuit and a terminal.

[0006] In a first aspect, an embodiment of the present disclosure provides a solid-state key function implementation circuit, comprising: a touch panel, a power supply module, a signal gain module, a signal judgment module and an execution module; a first sensing component is provided on the touch panel; the power supply module is configured to continuously supply power to the touch panel, the signal gain module, the signal judgment module and the execution module in various states of the terminal; the first sensing component is configured to detect a first control operation and generate a first control signal; the signal gain module is configured to amplify the first control signal and generate a gain signal; the signal judgment module is configured to compare the gain signal with a preset threshold signal and generate a comparison result signal; the execution module is configured to maintain or modify the current terminal state according to the comparison result signal.

[0007] In a second aspect, an embodiment of the present disclosure provides a terminal, comprising the solid-state key function implementation circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In the accompanying drawings of the embodiments of the present disclosure:

[0009] FIG1 is a block diagram of a circuit for implementing a solid-state key function according to an embodiment of the present disclosure;

[0010] FIG2 is a schematic diagram of the structure of an operation processing module according to an embodiment of the present disclosure;

[0011] FIG3 is a block diagram of a power supply module according to an embodiment of the present disclosure;

[0012] FIG4 is a block diagram of a signal gain module according to an embodiment of the present disclosure;

[0013] FIG5 is a schematic diagram of the structure of a signal gain module provided in an embodiment of the present disclosure;

[0014] FIG6 is a first block diagram of a signal determination module provided by an embodiment of the present disclosure;

[0015] FIG7 is a schematic diagram of a first component structure of a signal determination module provided in an embodiment of the present disclosure;

[0016] FIG8 is a second block diagram of a signal determination module provided by an embodiment of the present disclosure;

[0017] FIG9 is a schematic diagram of a second component structure of a signal determination module provided in an embodiment of the present disclosure;

[0018] FIG10 is a schematic diagram of a working embodiment of a false trigger protection circuit provided by an embodiment of the present disclosure;

[0019] FIG11 is a schematic diagram of the overall structure of a solid-state key function implementation circuit provided by an embodiment of the present disclosure;

[0020] FIG12 is a block diagram of terminal components provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] To enable those skilled in the art to better understand the technical solution of the present disclosure, the solid-state key function implementation circuit and terminal provided by the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0022] The present disclosure will be described more fully hereinafter with reference to the accompanying drawings, but the illustrated embodiments may be embodied in different forms, and the present disclosure should not be construed as limited to the embodiments set forth below. Rather, these embodiments are provided so that the present disclosure will be thorough and complete and will fully understand the scope of the present disclosure to those skilled in the art.

[0023] The accompanying drawings of the embodiments of the present disclosure are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the detailed embodiments, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing the detailed embodiments with reference to the accompanying drawings.

[0024] The present disclosure may be described with reference to plan views and / or cross-sectional views by way of ideal schematic views of the present disclosure. Therefore, the exemplary illustrations may be modified according to manufacturing techniques and / or tolerances.

[0025] In the absence of conflict, the various embodiments of the present disclosure and the various features therein may be combined with each other.

[0026] The terms used in this disclosure are only used to describe specific embodiments and are not intended to limit the disclosure. As used in this disclosure, the term "and / or" includes any and all combinations of one or more related enumerated items. As used in this disclosure, the singular forms "a" and "the" are also intended to include plural forms, unless the context clearly indicates otherwise. As used in this disclosure, the terms "comprising" and "made of" specify the presence of the 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.

[0027] Unless otherwise defined, all terms (including technical and scientific terms) used in this disclosure have the same meanings as those commonly understood by those skilled in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this disclosure, and will not be interpreted as having an idealized or overly formal meaning unless expressly defined in this disclosure.

[0028] The present disclosure is not limited to the embodiments shown in the drawings, but includes modifications of the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the drawings have schematic properties, and the shapes of the regions shown in the drawings illustrate the specific shapes of the regions of the elements, but are not intended to be limiting.

[0029] The power button (also known as the "start button") on current terminals (such as mobile terminals, including but not limited to mobile phones) is implemented using a traditional mechanical key. Mechanical keys require basic waterproofing and take up a lot of space. In the terminal field, major manufacturers are considering introducing new technologies to replace traditional mechanical keys.

[0030] In current common designs, solid-state buttons can only handle simple touch and slide events, not complex button functions. Other terminal status control operations, such as power on, shutdown after a freeze, and restart, require mechanical buttons. Furthermore, current solid-state button applications primarily utilize a solid-state button control chip for shutdown control. If this chip experiences an abnormal fault, it loses communication with the mobile terminal, rendering the device unrecoverable and impacting the user experience.

[0031] In the solid-state key function implementation circuit of the embodiment of the present disclosure, a first control operation (such as a pressing operation) is detected by a first sensing component on the touch panel, and a first control signal (such as a pressure signal) is generated. By processing the first control signal (such as amplifying and comparing), and controlling the current terminal state according to the processing result (such as a comparison result signal), the terminal's power on, power off, sleep, restart and other states can all be achieved through solid-state keys, without relying on mechanical keys, thereby avoiding many disadvantages of mechanical keys, having higher sensitivity and longer service life; and also having the advantages of being waterproof, dustproof, and corrosion-resistant, which can better protect the internal structure of the mobile phone. In addition, the power module of the embodiment of the present disclosure continuously supplies power to the touch panel, signal gain module, signal judgment module and execution module in various states of the terminal, so that the solid-state key function implementation circuit of the embodiment of the present disclosure can work in various states of the terminal, providing a technical basis for the terminal to control various terminal state operations such as powering on in the shutdown state, shutting down or restarting in the dead state, or shutting down or restarting in the sleep state through solid-state keys, thereby improving user operation convenience and improving user experience. In addition, in the embodiment of the present disclosure, the solid-state key function implementation circuit is mainly built through multiple hardware components, and does not rely solely on a solid-state key control chip, which improves the availability of the circuit and avoids the disadvantage of the overall solid-state key function being unable to be realized due to a chip failure.

[0032] The solid-state key function implementation circuit of the embodiment of the present disclosure can be applied to any terminal device that needs to be operated. The terminal device may include but is not limited to: vehicle-mounted equipment, user equipment (UE), mobile devices, computing devices, wearable devices, etc., for example, including but not limited to cellular phones, cordless phones, personal digital assistants (PDAs), portable computers, etc.

[0033] The following is a detailed introduction to the embodiments of the present disclosure.

[0034] An embodiment of the present disclosure provides a solid-state key function implementation circuit 1, as shown in Figure 1, which may include: a touch panel 11, a power module 12, a signal gain module 13, a signal judgment module 14 and an execution module 15; a first sensing component 111 is provided on the touch panel 11; the power module 12 is configured to continuously supply power to the touch panel 11, the signal gain module 13, the signal judgment module 14 and the execution module 15 in various states of the terminal; the first sensing component 111 is configured to detect a first control operation and generate a first control signal; the signal gain module 13 is configured to amplify the first control signal and generate a gain signal; the signal judgment module 14 is configured to compare the gain signal with a preset threshold signal and generate a comparison result signal; the execution module 15 is configured to maintain or modify the current terminal state according to the comparison result signal.

[0035] In the embodiment of the present disclosure, the first sensing component 111 may be a pressure sensing component, a proximity sensing component, or other operation sensing components, and any sensing component that can be implemented by a solid-state button.

[0036] In the embodiment of the present disclosure, various states of the terminal may include but are not limited to at least one of the following: a power-on working state, a power-off state, a sleep state, a restart state, etc.

[0037] Solid-state buttons, where solid-state refers to "fixed shape", that is, whether the button is pressed or not, the button will not change in shape (such as collapse, toggle, slide, seesaw, etc.). For more complex application requirements, graded pressure sensing can also be added to distinguish the severity of pressure. It is generally known as touch button (touch switch, tactile switch, tactile button) or touch button with pressure sensitivity.

[0038] In the disclosed embodiments, a solid-state key function implementation circuit 1 can be added to existing terminal hardware. This solid-state key function implementation circuit 1 can coexist with existing touch-operated keys in the terminal without interfering with each other, and expands the functionality of the existing touch-operated keys without increasing costs. The output port of the solid-state key function implementation circuit 1 only needs to be connected to the key information input port that is required to connect to the output port of the traditional touch-operated keys to achieve normal key function.

[0039] In the embodiment of the present disclosure, one or more groups of the solid-state key function implementation circuits 1 can be provided in the terminal, and one or more groups of the first sensing components 111 in each group of the solid-state key function implementation circuits 1 can be provided.

[0040] In the embodiment of the present disclosure, the existing touch operation button may be the operation processing module 16 shown in FIG. 2 , or referred to as a sliding processing module.

[0041] In the embodiment of the present disclosure, the operation processing module 16 may include a solid-state button control chip 161 (or D1) and a second sensing component 162, the solid-state button control chip 161 includes a power supply network; the second sensing component 162 is arranged on the touch panel 11; the second sensing component 162 is connected to the solid-state button control chip 161; the second sensing component 162 is powered by the power supply network; the second sensing component 162 is configured to detect a second control operation and collect a second control signal generated based on the second control operation; the second control operation includes a sliding operation, and the second control signal includes a sliding direction signal; the solid-state button control chip 161 is configured to control the terminal to perform a shutdown operation or a function application operation in the power-on working state according to the second control signal.

[0042] In the embodiment of the present disclosure, the operation processing module 16 can realize the existing functions in the terminal, such as shutdown in the power-on state, application operation, etc.

[0043] In an embodiment of the present disclosure, as shown in FIG2 , the second sensing component 162 may be one or more groups. For example, if the second sensing component 162 is two groups, it may include a second sensing component 162-1 and a second sensing component 162-2. The second control signal of the second sensing component 162-1 may be output through the AINP0 / AINN0 output port of the second sensing component 162-1 and input to the AINP0 / AINN0 input port of the solid-state key control chip 161 (or D1) after capacitor filtering through the sixth capacitor C6, the seventh capacitor C7, and the eighth capacitor C8. The second control signal of the second sensing component 162-2 may be output through the AINP1 / AINN1 output port of the second sensing component 162-2 and input to the AINP1 / AINN1 input port of the solid-state key control chip 161 (or D1) after capacitor filtering through the ninth capacitor C9, the tenth capacitor C10, and the eleventh capacitor C11.

[0044] In the embodiment of the present disclosure, the power input interfaces of the second sensing components 162 (including the second sensing components 162 - 1 and the second sensing components 162 - 2 ) can be connected to the power network of the solid-state key control chip 161 (PB0 / VS0 as shown in FIG. 2 ).

[0045] In the disclosed embodiment, the terminal is further provided with a voltage-stabilized power supply chip LDO1 and a terminal control chip D2. The voltage-stabilized power supply chip LDO1 and the terminal control chip D2 can control the power supply to the solid-state key control chip 161 (or D1), and the terminal control chip D2 can also control the functions of the solid-state key control chip 161.

[0046] In the disclosed embodiment, the input power VIN of the voltage-stabilized power supply chip LDO1 is connected to the system power supply VPH of the terminal, and the output power VOUT of the voltage-stabilized power supply chip LDO1 is connected to the power input VCC of the solid-state key control chip 161. The enable signal EN input of the voltage-stabilized power supply chip LDO1 is connected to the Pressure_VCC_EN signal (i.e., the pressure power enable signal) output of the terminal control chip D2, the RESET (reset) signal input of the solid-state key control chip 161 is connected to the Pressure_RESET signal (i.e., the pressure reset signal) output of the terminal control chip D2, the reset IIC / SPI (integrated circuit bus / serial peripheral interface) signal of the solid-state key control chip 161 is connected to the IIC / SPI signal of the terminal control chip D2, and the INT signal (i.e., reset interrupt signal) input of the solid-state key control chip 161 is connected to the INT signal output of the terminal control chip D2.

[0047] In the disclosed embodiment, after the terminal is powered on, the terminal control chip D2 starts operating. Terminal control chip D2 outputs the power enable signal Pressure_VCC_EN of the operation processing module 16 as high. When the Pressure_VCC_EN signal is high, the voltage regulator chip LDO1 of the operation processing module 16 operates and outputs the operating voltage required by the operation processing module 16. Terminal control chip D2 then outputs the Pressure_Reset signal of the operation processing module 16 as high. When the power supply of the operation processing module 16 reaches the required voltage and the Pressure_Reset signal of the operation processing module 16 goes high, the hardware initialization of the operation processing module 16 is complete and the operation starts. The operation processing module 16 then detects the second control operation on the second sensing component 162 in real time. When the operation processing module 16 detects a valid second control operation on the second sensing component 162 (i.e., the second control signal is valid), the operation processing module 16 sets the INT signal high, triggering communication with the terminal control chip D2.

[0048] In the embodiment of the present disclosure, the composition structure of the solid-state key function realization circuit 1 of the embodiment of the present disclosure is introduced in detail below.

[0049] In an embodiment of the present disclosure, as shown in Figure 3, the power supply module 12 may include a first power supply 121, a second power supply 122, a third power supply 123 and a fourth power supply 124; the first power supply 121 is used to provide power for the first sensing component 111; the second power supply 122 is used to provide power for the signal gain module 13; the third power supply 123 is used to provide power for the signal judgment module 14; and the fourth power supply 124 is used to provide power for the execution module 15.

[0050] In the embodiment of the present disclosure, the first power supply 121, the second power supply 122, the third power supply 123 and the fourth power supply 124 can be provided by a unified power supply or by different power supplies. The form of power supply is not limited here.

[0051] In the embodiment of the present disclosure, any multiple power supplies among the first power supply 121, the second power supply 122, the third power supply 123 and the fourth power supply 124 can also be combined, that is, if any multiple power supplies among the first power supply 121, the second power supply 122, the third power supply 123 and the fourth power supply 124 are the same, they can be provided by the same power supply.

[0052] In the embodiment of the present disclosure, the first power supply 121, the second power supply 122, the third power supply 123 and the fourth power supply 124 of the power module 12 continuously power the first sensing component 111, the signal gain module 13, the signal judgment module 14 and the execution module 15 in the power-on and power-off states, so that whether the terminal is in the power-off state or the power-on state, the solid-state key function implementation circuit 1 of the embodiment of the present disclosure can realize solid-state key operation, thereby realizing anytime control of the terminal, increasing the user's operating convenience, and improving the user experience.

[0053] In the embodiment of the present disclosure, a first sensing component 111 is provided on the touch panel 11. There may be one or more first sensing components 111. Here, only one first sensing component 111 is used as an example to illustrate the embodiment of the present disclosure. A first control signal from the first sensing component 111 can be output through the AINP2 / AINN2 output port of the first sensing component 111 and input to the signal gain module 13.

[0054] In the embodiment of the present disclosure, as shown in Figure 4, the signal gain module 13 includes: an input filtering unit 131, an input unit 132, a first operational amplifier 133 and a power supply filtering unit 134 of the first operational amplifier 133; the input filtering unit 131 is configured to filter the first control signal; the input unit 132 is configured to input the filtered first control signal into the positive input terminal and the negative input terminal of the first operational amplifier 133; the first operational amplifier 133 is configured to amplify the input first control signal; the output terminal of the first operational amplifier serves as the output terminal of the signal gain module; the power supply filtering unit 134 of the first operational amplifier is configured to filter the input power of the first operational amplifier 133.

[0055] In the embodiment of the present disclosure, the input filter unit 131 includes: a first capacitor C1, a second capacitor C2 and a third capacitor C3; wherein the first capacitor C1 is connected between the two output ends of the first inductive component 111; the second capacitor C2 and the third capacitor C3 are connected in series between the two output ends of the first inductive component 111; and the connection end of the second capacitor C2 and the third capacitor C3 is grounded.

[0056] In the embodiment of the present disclosure, the input unit 132 includes: a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4; wherein, the first end of the first resistor R1 is connected to the first output end of the first sensing component 111; the second end of the first resistor R1 is connected to the negative input end of the first operational amplifier 133; the first end of the second resistor R2 is connected to the negative input end of the first operational amplifier 133; the second end of the second resistor R2 is connected to the output end of the first operational amplifier 133; the first end of the third resistor R3 is connected to the second output end of the first sensing component 111; the second end of the third resistor R3 is connected to the positive input end of the first operational amplifier 133; the first end of the fourth resistor R4 is connected to the positive input end of the first operational amplifier 133; and the second end of the fourth resistor R4 is connected to the bias power supply of the first operational amplifier 133.

[0057] In the embodiment of the present disclosure, the power supply filter unit 134 of the first operational amplifier 133 includes: a fifth resistor R5 and a fourth capacitor C4; wherein the fifth resistor R5 is connected in series between the second power supply 122 of the power supply module 12 and the positive power input terminal of the first operational amplifier 133; the second power supply 122 continues to supply power to the first operational amplifier 133 when the terminal is in the shutdown state; the fourth capacitor C4 is connected in series between the ground terminal and the positive power input terminal of the first operational amplifier 133.

[0058] In the embodiment of the present disclosure, as shown in FIG5 , after the first control signal is output from the AINP2 / AINN2 output port of the first sensing component 111, the first control signal is filtered through the first capacitor C1, the second capacitor C2, and the third capacitor C3. The filtered first control signal is then input to the input resistors R1 and R3 of the first operational amplifier 133.

[0059] In the embodiment of the present disclosure, the first inductive component 111 is powered by a first power source 121 , and the first power source 121 may be a power network PB1 / VS1 as shown in FIG. 5 .

[0060] In the disclosed embodiment, the first power supply 121 can be configured separately and independently of the power supply network of the second sensing component 162. Furthermore, the first control signal of the first sensing component 111 and its AINP2 / AINN2 output ports are independent of the second control signal of the second sensing component 162 and its AINP0 / AINN0 output ports and AINP1 / AINN1 output ports. This enables high-precision data acquisition, reduces the impact between the touch operation detection of the solid-state key function implementation circuit 1 and the touch operation detection of the operation processing module 16 in the disclosed embodiment, and improves the accuracy of the solution.

[0061] In the embodiment of the present disclosure, in terms of physical structure, the first sensing component 111 and its AINP2 / AINN2 output port, and the second sensing component 162 and its AINP0 / AINN0 output port and AINP1 / AINN1 output port can be arranged together on the touch panel 11, that is, the first sensing component 111 and the second sensing component 162 are integrated on the touch panel 11 to realize the two-in-one solution of the solid-state key function implementation circuit 1 solution and the operation processing module 16 solution of the embodiment of the present disclosure, thereby improving the user experience.

[0062] In the embodiment of the present disclosure, the third resistor R3 and the fourth resistor R4 in the input unit 132 constitute the input circuit of the positive input network IN+ of the first operational amplifier 133, and the second end of the fourth resistor R4 is connected to the power supply VREF_EC, which can serve as a bias power supply for the first operational amplifier 133.

[0063] In the embodiment of the present disclosure, the first resistor R1 and the second resistor R2 in the input unit 132 constitute the input circuit of the negative input network IN- of the first operational amplifier 133 , and the second end of the second resistor R2 is connected to the output end of the first operational amplifier 133 .

[0064] In the embodiment of the present disclosure, the input power supply of the first operational amplifier 133 is the second power supply 122, which may be the power supply VREG_SYS_1P8 shown in Figure 5. The second power supply 122 still supplies power to the first operational amplifier 133 when the terminal is powered off.

[0065] In the embodiment of the present disclosure, the second power supply 122 is connected to the positive power input terminal of the first operational amplifier 133 after passing through the power supply filter circuit composed of the fifth resistor R5 and the fourth capacitor C4, and the negative power input terminal of the first operational amplifier 133 is connected to GND (ground terminal).

[0066] In the embodiment of the present disclosure, the first control signal emitted by the first sensing component 111 is amplified by the signal gain module 13 , and then the signal gain module 13 outputs a gain signal Vout_ec.

[0067] In the embodiment of the present disclosure, as shown in Figure 6, the signal judgment module 14 includes: a threshold voltage generating circuit 141, a second operational amplifier 142 and a power supply filtering unit 143 of the second operational amplifier 142; the output end of the threshold voltage generating circuit 141 is connected to the positive input end of the second operational amplifier 142; the negative input end of the second operational amplifier 142 is used to input the first control signal; the output end of the second operational amplifier 142 serves as the output end of the signal judgment module 14; the threshold signal includes a threshold voltage; the threshold voltage generating circuit 141 is configured to generate a threshold voltage; the second operational amplifier 142 is configured to compare the first control signal with the threshold voltage to generate a comparison result signal; the power supply filtering unit 143 of the second operational amplifier 142 is configured to filter the input power of the second operational amplifier 142.

[0068] In an embodiment of the present disclosure, as shown in Figure 7, the threshold voltage generating circuit 141 includes: a sixth resistor R6 and a seventh resistor R7; wherein the first end of the sixth resistor R6 is grounded; the second end of the sixth resistor R6 is connected to the positive input terminal of the second operational amplifier 142; the seventh resistor R7 is connected between the positive input terminal of the second operational amplifier 142 and the positive power input terminal of the second operational amplifier 142; the positive power input terminal of the second operational amplifier 142 is connected to the third power supply 123 of the power supply module 12, and the negative power input terminal of the second operational amplifier 142 is grounded; the third power supply 123 continues to supply power to the second operational amplifier 142 when the terminal is powered off.

[0069] The power supply filter unit 143 of the second operational amplifier 142 includes a fifth capacitor C5 , wherein a first end of the fifth capacitor C5 is connected to the third power supply 123 , and a second end of the fifth capacitor C5 is grounded.

[0070] In the embodiment of the present disclosure, the main function of the signal judgment module 14 is to compare the amplified gain signal Vout_ec with the threshold voltage on the positive input network IN+ pin of the second operational amplifier 142 to perform a threshold judgment, thereby determining whether the user's first control signal reaches the set threshold voltage. If the first control signal reaches the set threshold voltage, the first control signal is valid; if the first control signal does not reach the set threshold voltage, the first control signal is invalid, and the second operational amplifier 142 outputs a comparison result signal PHONE_ON_N based on the comparison result.

[0071] In the embodiment of the present disclosure, the second end of the sixth resistor R6 is connected to the positive input terminal of the second operational amplifier 142, and the first end of the seventh resistor R7 is connected to the positive input terminal of the second operational amplifier 142, so that the sixth resistor R6 and the seventh resistor R7 constitute the input circuit of the positive input network IN+ of the second operational amplifier 142, the first end of the sixth resistor R6 is grounded, and the second end of the seventh resistor R7 is connected to the positive power input terminal of the second operational amplifier 142, that is, the second end of the seventh resistor R7 is connected to the input power supply of the second operational amplifier 142, and the input power supply is the third power supply 123 of the power supply module 12. The third power supply 123 can be the power supply VREG_SYS_1P8 shown in Figure 7. That is, since the first operational amplifier 133 and the second operational amplifier 142 are both operational amplifiers, the same input power supply can be used.

[0072] In the embodiment of the present disclosure, the power supply VREG_SYS_1P8 is connected to the positive power input terminal V+ of the second operational amplifier 142 after being filtered by the fifth capacitor C5, and the negative power input terminal V− of the second operational amplifier 142 is connected to GND.

[0073] In an embodiment of the present disclosure, as shown in FIG8 , the signal determination module 14 may further include a false trigger protection circuit 144 ; the false trigger protection circuit 144 is disposed between the positive input terminal and the signal output terminal of the second operational amplifier 142 .

[0074] In the embodiment of the present disclosure, the false trigger protection circuit 144 is mainly used to prevent false triggering.

[0075] In an embodiment of the present disclosure, as shown in FIG9 , the false trigger protection circuit 144 includes: an eighth resistor R8 ; a first end of the eighth resistor R8 is connected to the positive input end of the second operational amplifier 142 ; and a second end of the eighth resistor R8 is connected to the signal output end of the second operational amplifier 142 .

[0076] In the embodiment of the present disclosure, the eighth resistor R8 also forms part of the input circuit of the positive input network IN+ of the second operational amplifier 142. A first end of the eighth resistor R8 is connected to the positive input terminal IN+ of the second operational amplifier 142, and a second end is connected to the signal output terminal Vout_com of the second operational amplifier 142.

[0077] In the disclosed embodiment, the eighth resistor R8 serves as a hysteresis resistor for the second operational amplifier 142. In practical applications, whether to use the eighth resistor R8 can be determined based on specific circumstances, thereby optimizing the circuit. Using the eighth resistor R8 can increase the trigger voltage differential and reduce the release voltage differential, thereby improving false triggering.

[0078] In the disclosed embodiment, as shown in FIG10 , for example, assuming Vs = 5V, R6 = R7 = R8 = 1MΩ (megaohm), when the signal gain module 13 outputs a high level, Va1 = 3.33V, as shown in FIG10 A circuit diagram. When the signal gain module 13 outputs a low level, Va2 = 1.67V, as shown in FIG10 B circuit diagram. Therefore, in this embodiment, the low level is triggered only when Vin of the second operational amplifier 142 reaches 3.33V, thereby improving the problem of false triggering.

[0079] In the disclosed embodiment, the resistance hysteresis scheme of the eighth resistor R8 enables a large trigger voltage range and a small release voltage, thereby improving the entry conditions for false triggering, reducing pressure changes, releasing in advance, and improving the reliability of the scheme.

[0080] In the embodiment of the present disclosure, the above-mentioned false trigger protection circuit 144 may include but is not limited to the eighth resistor R8. It can be implemented by a combination of multiple resistors and is not limited to being implemented only by resistors. The false trigger protection circuit can be implemented by any feasible electronic components.

[0081] In the embodiment of the present disclosure, the first control operation may include but is not limited to a pressing operation and / or a proximity operation, and the first control signal may include but is not limited to a pressure signal and / or a proximity sensing signal.

[0082] In an embodiment of the present disclosure, the comparison result signal may include the operation force information and operation duration information of the first control operation; the execution module 15 maintains or modifies the current terminal state according to the comparison result signal, which may include: determining whether to modify the current terminal state according to the operation force information; and in the case of determining to modify the current terminal state according to the operation force information, modifying the current terminal state to the terminal state corresponding to the operation duration information.

[0083] In an embodiment of the present disclosure, the execution module 15 can determine whether to modify the current terminal state based on the pressing force information, and if it is determined to modify the current terminal state based on the pressing force information, the current terminal state is modified to the terminal state corresponding to the pressing duration information; and / or, the execution module 15 can determine whether to modify the current terminal state based on the proximity sensing strength information, and if it is determined to modify the current terminal state based on the proximity sensing strength information, the current terminal state is modified to the terminal state corresponding to the proximity sensing duration information.

[0084] In the embodiment of the present disclosure, the execution module 15 can be implemented by using an existing module in the terminal, and any module or chip that can adjust the terminal state according to the operation force information and the operation duration information can be used.

[0085] In the embodiment of the present disclosure, after the signal output terminal Vout_com of the second operational amplifier 142 outputs the comparison result signal PHONE_ON_N, the execution module 15 can detect whether PHONE_ON_N is a high level or a low level. The high level and the low level are used to indicate the magnitude of the operation force. Based on the high level or the low level, it can be determined whether to maintain the current terminal state or modify the current terminal state. For example, when PHONE_ON_N is a low level, the current terminal state is modified, and when PHONE_ON_N is a high level, the current terminal state is maintained. In actual application, it can be defined as needed whether the current terminal state needs to be modified when the current level is high or when the current level is low, which is not specifically defined here.

[0086] In an embodiment of the present disclosure, after detecting that PHONE_ON_N is at a high level or a low level, the duration of the high level or the low level can be further detected. The duration of the high level or the low level is used to indicate the operation duration information, wherein the longer the duration, the longer the operation duration.

[0087] In the embodiment of the present disclosure, when it is determined that the current terminal state needs to be modified, the current terminal state can be modified accordingly according to the different durations, that is, different durations can correspond to different modified terminal states.

[0088] In the embodiment of the present disclosure, the execution module 15 modifies the current terminal state to the terminal state corresponding to the operation duration information, which may include any one of the following: changing the terminal from the power-on working state to: the power-off state, the sleep state or the restart; changing the terminal from the power-off state to: the power-on working state or the sleep state; changing the terminal from the sleep state to: the power-on working state, the power-off state or the restart; changing the terminal from the dead state to: the power-off state or the restart.

[0089] In the embodiment of the present disclosure, the current terminal state may include but is not limited to any one of the following: powered-on working state, dormant state, frozen state, and powered-off state. The modified terminal state may include but is not limited to any one of the following: powered-on working state, dormant state, frozen state, powered-off state, and restart.

[0090] In the embodiment of the present disclosure, the terminal state can be modified based on the current terminal state and the duration of the state. During implementation, the terminal state can be modified based on a preset mapping table.

[0091] In the embodiment of the present disclosure, for example, matching operations such as shutdown, long press to restart, etc. can be performed according to the duration of the low level to eliminate the current terminal fault.

[0092] In the embodiment of the present disclosure, as shown in Figure 11, a schematic diagram of the overall structure of the solid-state key function implementation circuit 1 of the embodiment of the present disclosure is shown. Based on Figure 11, the following is a working example of the solid-state key function implementation circuit 1 of the embodiment of the present disclosure.

[0093] In the embodiment of the present disclosure, when the terminal is powered on or off, when the terminal user lightly presses the first sensing component 111, the voltage difference on the first control signal output terminal AINP2 / AINN2 of the first sensing component 111 is small. After the first control signal is amplified by the first operational amplifier 133, the first operational amplifier 133 outputs a gain signal Vout_ec. If the gain signal Vout_ec is still a small signal, the gain signal Vout_ec passes through the second operational amplifier 142 and is compared with a threshold voltage formed by the power supply voltage divider of VREG_SYS_1P8 (i.e., the third power supply). If the gain signal Vout_ec is less than the threshold voltage formed by the power supply voltage divider of VREG_SYS_1P8, the signal output terminal Vout_com of the second operational amplifier 142 outputs a high-level signal, i.e., the PHONE_ON_N signal of the terminal is high, and the execution module 15 determines that no key event has occurred.

[0094] In the embodiment of the present disclosure, when the terminal is powered on, when the terminal user presses the first sensing component 111 hard, a large voltage difference occurs at the first control signal output terminals AINP2 / AINN2 of the first sensing component 111. After the first control signal is amplified by the first operational amplifier 133, the first operational amplifier 133 outputs a gain signal Vout_ec. If the gain signal Vout_ec is still a large signal, the gain signal Vout_ec passes through the second operational amplifier 142 and is compared with a threshold voltage formed by the power supply voltage divider of VREG_SYS_1P8 (i.e., the third power supply). If the gain signal Vout_ec is greater than the threshold voltage formed by the power supply voltage divider of VREG_SYS_1P8, the signal output terminal Vout_com of the second operational amplifier 142 outputs a low-level signal, i.e., the PHONE_ON_N signal of the terminal is low. The execution module 15 determines that a key event has occurred. The execution module 15 then responds to operations such as sleep / power off / long press to restart based on the duration (i.e., duration) of the key event.

[0095] In the disclosed embodiment, when the terminal is powered off, when the terminal user presses the first sensing component 111 hard, a large voltage difference occurs at the first control signal output terminals AINP2 / AINN2 of the first sensing component 111. After the first operational amplifier 133 amplifies the first control signal, the first operational amplifier 133 outputs a gain signal Vout_ec. If the gain signal Vout_ec remains high, the gain signal Vout_ec passes through the second operational amplifier 142 and is compared with a threshold voltage formed by the power supply voltage divider of VREG_SYS_1P8 (i.e., the third power supply). If the gain signal Vout_ec is greater than the threshold voltage formed by the power supply voltage divider of VREG_SYS_1P8, the signal output terminal Vout_com of the second operational amplifier 142 outputs a low-level signal, i.e., the PHONE_ON_N signal of the terminal is low. The execution module 15 determines that a key event has occurred. The execution module 15 then performs a power-on operation based on the duration (i.e., the duration) of the key event, allowing the terminal to enter either the power-on working state or the power-on sleep state.

[0096] The embodiments of the present disclosure include at least the following advantages:

[0097] 1. An independent power supply continuously supplies power to the touch panel, signal gain module, signal judgment module, and execution module in both the on and off states, and the power supply can be independently and differentially configured, so that whether the terminal is in the off state or the on state, solid-state key operation can be realized through the solid-state key function realization circuit 1 of the embodiment of the present disclosure, thereby realizing control of the terminal at any time, increasing the user's operating convenience, and improving the user experience.

[0098] 2. The first sensing component and the second sensing component are set separately, and the signals are collected separately, achieving high-precision collection, which can reduce the impact between the touch operation detection of the solid-state key function implementation circuit 1 of the embodiment of the present disclosure and the touch operation detection of the operation processing module 16, and improve the accuracy of the solution.

[0099] 3. The solid-state key function implementation circuit of the embodiment of the present disclosure is integrated into the operation processing module 16 to realize the two-in-one solution of the solid-state key function implementation circuit 1 of the embodiment of the present disclosure and the solution of the operation processing module 16, thereby improving the user experience.

[0100] 4. The hardware adaptively processes the voltage, and the circuit adopts a hysteresis scheme, which makes the trigger voltage range large and the release voltage small, which can improve the false triggering entry conditions and reduce the premature release of pressure changes, thereby improving the reliability of the scheme.

[0101] The embodiment of the present disclosure further provides a terminal 2, as shown in FIG12, comprising the solid-state key function implementation circuit 1.

[0102] In the embodiment of the present disclosure, any embodiment of the aforementioned solid-state key function implementation circuit 1 can be applied to the terminal embodiment, and will not be described in detail here.

[0103] Those skilled in the art will appreciate that all or some of the functional modules / units disclosed above may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0104] In hardware implementations, the division between functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation.

[0105] Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit (CPU), a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As is well known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, random access memory (RAM, more specifically SDRAM, DDR, etc.), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory (FLASH) or other disk storage; compact disc (CD-ROM), digital versatile disc (DVD) or other optical disc storage; magnetic cassettes, tapes, disk storage or other magnetic storage; any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0106] The present disclosure has disclosed example embodiments, and although specific terms are employed, they are used and should be interpreted only in a general illustrative sense and not for purposes of limitation. In some instances, it will be apparent to those skilled in the art that, unless otherwise expressly stated, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments. Therefore, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the scope of the present disclosure as set forth in the appended claims.

Claims

1. A solid-state key function implementation circuit, comprising: Touch panel, power module, signal gain module, signal judgment module and execution module; The touch panel is provided with a first sensing component; The power supply module is configured to continuously supply power to the touch panel, the signal gain module, the signal determination module, and the execution module in various states of the terminal; The first sensing component is configured to detect a first control operation and generate a first control signal; The signal gain module is configured to amplify the first control signal to generate a gain signal; The signal determination module is configured to compare the gain signal with a preset threshold signal to generate a comparison result signal; The execution module is configured to maintain or modify the current terminal state according to the comparison result signal.

2. The solid-state key function implementation circuit according to claim 1, wherein: The power supply module includes a first power supply, a second power supply, a third power supply and a fourth power supply; The first power supply is used to provide power to the first sensing component; The second power supply is used to provide power to the signal gain module; The third power supply is used to provide power to the signal determination module; The fourth power supply is used to provide power to the execution module.

3. The solid-state key function implementation circuit according to claim 1, wherein: The signal gain module includes: an input filter unit, an input unit, a first operational amplifier, and a power filter unit of the first operational amplifier; The input filtering unit is configured to filter the first control signal; The input unit is configured to input the filtered first control signal into the positive input terminal and the negative input terminal of the first operational amplifier; The first operational amplifier is configured to amplify the input first control signal; the output end of the first operational amplifier serves as the output end of the signal gain module; The power supply filter unit of the first operational amplifier is configured to filter the input power supply of the first operational amplifier.

4. The solid-state key function implementation circuit according to claim 3, wherein: The input filter unit includes: a first capacitor, a second capacitor and a third capacitor; The first capacitor is connected between the two output terminals of the first inductive component; the second capacitor and the third capacitor are connected in series between the two output terminals of the first inductive component; and the connection terminal between the second capacitor and the third capacitor is grounded; The input unit includes: a first resistor, a second resistor, a third resistor and a fourth resistor; Wherein, a first end of the first resistor is connected to the first output end of the first sensing component; a second end of the first resistor is connected to the negative input end of the first operational amplifier; a first end of the second resistor is connected to the negative input end of the first operational amplifier; a second end of the second resistor is connected to the output end of the first operational amplifier; a first end of the third resistor is connected to the second output end of the first sensing component; a second end of the third resistor is connected to the positive input end of the first operational amplifier; a first end of the fourth resistor is connected to the positive input end of the first operational amplifier; and a second end of the fourth resistor is connected to the bias power supply of the first operational amplifier. The power supply filter unit of the first operational amplifier includes: a fifth resistor and a fourth capacitor; The fifth resistor is connected in series between the second power supply of the power supply module and the positive power input terminal of the first operational amplifier; the fourth capacitor is connected in series between the ground terminal and the positive power input terminal of the first operational amplifier.

5. The solid-state key function implementation circuit according to claim 1, wherein: The signal determination module includes: a threshold voltage generating circuit, a second operational amplifier, and a power supply filter unit of the second operational amplifier; the output end of the threshold voltage generating circuit is connected to the positive input end of the second operational amplifier; the negative input end of the second operational amplifier is used to input the first control signal; the output end of the second operational amplifier serves as the output end of the signal determination module; the threshold signal includes a threshold voltage; The threshold voltage generating circuit is configured to generate the threshold voltage; The second operational amplifier is configured to compare the first control signal with the threshold voltage to generate the comparison result signal; The power supply filter unit of the second operational amplifier is configured to filter the input power supply of the second operational amplifier.

6. The solid-state key function realization circuit according to claim 5, wherein: The threshold voltage generating circuit includes: a sixth resistor and a seventh resistor; Wherein, the first end of the sixth resistor is grounded; the second end of the sixth resistor is connected to the positive input terminal of the second operational amplifier; the seventh resistor is connected between the positive input terminal of the second operational amplifier and the positive power supply input terminal of the second operational amplifier; The positive power input terminal of the second operational amplifier is connected to the third power supply of the power module, and the negative power input terminal of the second operational amplifier is grounded; The power supply filter unit of the second operational amplifier includes: a fifth capacitor; Wherein, a first end of the fifth capacitor is connected to the third power supply, and a second end of the fifth capacitor is grounded.

7. The solid-state key function realization circuit according to claim 5, wherein: The signal determination module further includes: a false trigger protection circuit; The false trigger protection circuit is arranged between the positive input terminal and the signal output terminal of the second operational amplifier.

8. The solid-state key function realization circuit according to claim 7, wherein: The false trigger protection circuit includes: an eighth resistor; The first end of the eighth resistor is connected to the positive input terminal of the second operational amplifier; The second end of the eighth resistor is connected to the signal output end of the second operational amplifier.

9. The solid-state key function realization circuit according to claim 1, wherein: The first control operation includes a pressing operation and / or a proximity operation, and the first control signal includes a pressure signal and / or a proximity sensing signal; The comparison result signal includes information about the magnitude of the operation force and the duration of the operation of the first control operation; The execution module maintains or modifies the current terminal state according to the comparison result signal, including: Determining whether to modify the current terminal state according to the operation force information; In the case where it is determined to modify the current terminal state according to the operation force information, the current terminal state is modified to the terminal state corresponding to the operation duration information.

10. The solid-state key function realization circuit according to claim 9, wherein: The execution module modifies the current terminal state to the terminal state corresponding to the operation duration information, including any one of the following: Changing the terminal from a powered-on state to a powered-off state, a dormant state, or a restart; Changing the terminal from a shutdown state to a power-on working state or a sleep state; Changing the terminal from a dormant state to a powered-on state, a powered-off state, or a restart; Change the terminal from a frozen state to a shutdown state or restart.

11. The solid-state key function implementation circuit according to claim 1, further comprising: An operation processing module; the operation processing module includes a solid-state key control chip and a second sensing component, the solid-state key control chip includes a power supply network; the second sensing component is disposed on the touch panel; the second sensing component is connected to the solid-state key control chip; the second sensing component is powered by the power supply network; The second sensing component is configured to detect a second control operation and collect a second control signal generated based on the second control operation; the second control operation includes a sliding operation, and the second control signal includes a sliding direction signal; The solid-state button control chip is configured to control the terminal to perform a shutdown operation or a function application operation in a power-on working state according to the second control signal.

12. A terminal comprising the solid-state key function implementation circuit according to any one of claims 1 to 11.

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