Circuit for automatically starting up notebook computer

Abstract

The utility model discloses a circuit for automatically starting up a notebook computer, which is characterized in that a Hall sensor and a magnet are respectively fixed on a base and a display upper cover, an output pin of the Hall sensor is connected to a grid electrode of a 2421th field-effect tube, a drain electrode of the 2421th field-effect tube is connected with a grid electrode of a 35th field-effect tube, and an output pin of the 35th field-effect tube is connected with an output pin of the magnet. The drain electrode of the 35th field-effect transistor is connected with the grid electrode of the 2422th field-effect transistor, the drain electrode of the 35th field-effect transistor and the grid electrode of the 2422th field-effect transistor are connected with the ground through the 498th resistor and the 9007th capacitor respectively, the first input pin of the converter is connected with the drain electrode of the 2421th field-effect transistor, and the second input pin of the converter is connected with the drain electrode of the 2421th field-effect transistor. A specific field effect transistor, resistors, capacitors and a converter with an XNOR gate are introduced, and particularly, the 498th resistor and the 9007th capacitor are utilized to control the level rising speed, so that a first input pin and a second input pin of the converter generate interpolation to trigger the XNOR gate, it is ensured that the cover opening action can rapidly and accurately trigger a starting-up signal, and the starting-up efficiency is improved. And meanwhile, the cost of automatic startup is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a circuit for automatically starting a notebook computer. Background Art

[0002] In today's laptop market, users have increasingly high demands for device convenience and functionality. Among them, the automatic power-on function, especially automatic power-on achieved by simply opening the lid, has become an important aspect of improving the user experience. However, existing laptop automatic power-on solutions generally rely on the cooperation of software and microcontroller units (MCUs). While this method is effective, in the existing technology, achieving automatic power-on of laptops when the lid is opened mainly relies on the intervention of software programs and MCUs. The MCU then runs a preset software program to determine whether to perform the power-on operation. This software-dependent mechanism increases the complexity of the system and also brings additional costs, because it requires a dedicated built-in MCU and the development and maintenance of corresponding software programs. For example, Chrome Books require the H1 chip to implement this, while the X86 platform requires the EC to implement it. However, platforms like RK do not have EC or H1 and can only be implemented through hardware.

[0003] More importantly, the combination of software and hardware often involves firmware updates and maintenance, which not only increases manufacturing costs but can also affect boot reliability due to software glitches or compatibility issues. Furthermore, software solutions are slower to respond than pure hardware solutions, which can negatively impact the user experience.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a circuit for automatically starting a notebook computer, so as to solve the problem in the prior art that the cost of automatically starting a notebook computer by opening the cover is too high.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a circuit for automatically starting up a laptop computer, comprising a corresponding Hall sensor and a magnet, the Hall sensor and the magnet being fixed on the host base and the display cover respectively, and also comprising a 2421st field-effect transistor, a 35th field-effect transistor, a 498th resistor, a 9007th capacitor, a 2422nd field-effect transistor and a converter with an exclusive-NOR gate, wherein the output pin of the Hall sensor is connected to the gate of the 2421st field-effect transistor, the drain of the 2421st field-effect transistor is connected to the gate of the 35th field-effect transistor, the drain of the 35th field-effect transistor is connected to the gate of the 2422nd field-effect transistor and the connection points are grounded through the 498th resistor and the 9007th capacitor respectively, the first input pin of the converter is connected to the drain of the 2421st field-effect transistor, and the second input pin of the converter is connected to the drain of the 2421st field-effect transistor.

[0007] In one embodiment of the present invention, the capacitance of the 9007th capacitor is 1.0-10 uF.

[0008] The beneficial effect of the above embodiment is that the capacitance of the 9007th capacitor is between 1.0-10uF, which optimizes the charging and discharging performance of the circuit, ensures that the circuit can respond quickly after sensing the cover opening action, and operates stably, avoiding possible noise interference or false triggering.

[0009] In one embodiment of the present invention, a 638th resistor is further included, one end of the 638th resistor is connected to the drain of the 2421st field effect transistor, and the other end of the 638th resistor is connected to the system voltage terminal.

[0010] The beneficial effect of the above embodiment is that the 638th resistor is connected to the system voltage terminal, which facilitates and quickly lowers the voltage of the 35th field effect transistor, thereby enhancing the accuracy of the entire circuit.

[0011] In one embodiment of the present invention, a 2425th field effect transistor and a 2426th field effect transistor are further included, the drain of the 2425th field effect transistor is connected to the drain of the 2421st field effect transistor, the drain of the 2426th field effect transistor is connected to the drain of the 2422nd field effect transistor, and the gates of the 2425th field effect transistor and the 2426th field effect transistor are both connected to a battery power supply.

[0012] The beneficial effect of the above embodiment is that the battery power supply ensures that the converter will not be triggered to output a low level, thereby avoiding false triggering and starting up due to power-on at the moment the battery is inserted, thereby improving the reliability and stability of the circuit.

[0013] In one embodiment of the present invention, a voltage port VCC3V3_PMU is further included, and the gate of the 2425th field effect transistor and the gate of the 2426th field effect transistor are respectively connected to the voltage port VCC3V3_PMU.

[0014] The beneficial effect of the above embodiment is that after the power is turned on, the voltage port is powered on to lower the voltage of the first input terminal and the second input terminal of the converter, ensuring that the circuit is shielded in the sleep or power-on state, and ensuring that the opening and closing of the cover is not affected in the power-on state.

[0015] As described above, the circuit for automatically starting up a laptop computer of the present invention has the following beneficial effects: by introducing specific field-effect transistors, resistors, capacitors, and a converter with an XOR gate, a purely hardware-based automatic power-on solution is implemented, which reduces costs and improves response speed and system stability; in particular, the 498th resistor and the 9007th capacitor are used to control the speed of level rise, so that the first input pin and the second input pin of the converter generate an interpolation triggering XOR gate, ensuring that the cover opening action can quickly and accurately trigger the power-on signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 A schematic diagram of a notebook computer provided by the present utility model;

[0018] Figure 2 A partial circuit diagram of a circuit for automatically starting a notebook computer provided by the present invention;

[0019] Figure 3 This is a partial circuit diagram of a circuit for automatically starting a notebook computer provided by the utility model.

[0020] Component number description

[0021] Q2421 FET U7006 Converter

[0022] Q35 35th FET R638 638th resistor

[0023] R498 No. 498 resistor Q2425 No. 2425 field effect transistor

[0024] C9007 No. 9007 capacitor Q2426 No. 2426 field effect transistor

[0025] Q2422 Field Effect Transistor DETAILED DESCRIPTION

[0026] The present invention provides a circuit for automatically starting a notebook computer. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0027] In the description of this utility model, it should be understood that the terms "upper, lower, left, and right" and the like indicating directions or positions are based on the directions or positions shown in the accompanying drawings and are intended solely to facilitate and simplify the description of this utility model and are not to be construed as limiting the scope of this utility model. Furthermore, the terms "installation" and "connection" are to be understood broadly, and those skilled in the art will be able to understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0028] See also Figure 1 and Figure 3 The present invention provides a circuit for automatically starting a laptop computer. It mainly utilizes the interaction between a Hall sensor and a magnet, in conjunction with specific electronic components, to achieve the function of automatically starting the computer when the display cover of the laptop is opened. The circuit mainly includes a corresponding Hall sensor and a magnet, which are respectively fixed on the host base and the display cover. It also includes the 2421st field effect transistor Q2421, the 35th field effect transistor Q35, the 498th resistor R498, the 9007th capacitor C9007, the 2422nd field effect transistor Q2422 and a converter U7006 with an exclusive NOR gate. The output pin of the Hall sensor is connected to the gate of the 2421st field effect transistor Q2421, and the 9007th capacitor C9007 is connected to the gate of the 2421st field effect transistor Q2421. The drain of the 2421st field-effect transistor Q2421 is connected to the gate of the 35th field-effect transistor Q35, the drain of the 35th field-effect transistor Q35 is connected to the gate of the 2422nd field-effect transistor, and the connection point is grounded via the 498th resistor R498 and the 9007th capacitor C9007 respectively. The first input pin of the converter is connected to the drain of the 2421st field-effect transistor Q2421, and the second input pin of the converter is connected to the drain of the 2421st field-effect transistor Q2421.

[0029] The specific working process of the circuit for automatic startup of laptop computers is as follows: because the Hall sensor is away from the magnet and outputs a high level after the cover is opened, HALL_INT pulls down HALL_INT_N_R through the 2421th field-effect transistor Q2421. Because HALL_INT_N_R is pulled down, the 35th field-effect transistor Q35 is released, and the level of HALL_INT_N_MOS rises slowly through the 498th resistor R498 and the 9077th capacitor. The level of the second input pin of the converter will not become low immediately, resulting in inconsistent levels between the first input pin of the converter and the second input pin of the converter, thereby triggering the exclusive-NOR gate in the converter U7006 to output a low level.

[0030] In the embodiment of the present invention, the capacitance of the 9007th capacitor C9007 is adopted to be between 1.0-10uF, which can change the time of level change to meet the platform requirements. Preferably, the capacitance of the 9007th capacitor C9007 is 10uF, and the specific RC value in the circuit diagram is 520ms.

[0031] In addition, the present invention also introduces the 638th resistor R638, one end of which is connected to the drain of the 2421st field-effect transistor Q2421, and the other end is connected to the system voltage terminal. After the cover is closed, the Hall sensor is close to the magnet, causing the out pin to output a low level, and the HALL_INT level jumps from 3.3V to 0V. The 2421st field-effect transistor Q2421 is released, and HALL_INT_N_R is pulled to 3.3V by the 638th resistor R638. After HALL_INT_N_R is pulled to 3.3v, HALL_INT_N is quickly pulled low through the 35th field-effect transistor Q35. At the same time, the HALL_INT_N_DELAY level is quickly pulled high because the MOS is separated. The levels of points A and B are both high, and the exclusive-NOR gate in the converter U7006 will not be triggered.

[0032] To further enhance the stability and reliability of the circuit, the present invention also includes a FET No. 2425 Q2425 and a FET No. 2426 Q2426. The drains of these two FETs are connected to the drains of the FET No. 2421 Q2421 and the FET No. 2422 Q2422, respectively, and their gates are connected to the battery power source. This ensures that the XOR gate of the converter U7006 will not be triggered to output a low level when the battery power is connected, thus preventing false triggering and startup caused by powering up at the moment the battery is inserted.

[0033] Finally, the present invention also includes a voltage port VCC3V3_PMU, and the gate of the 2425th field-effect transistor Q2425 and the gate of the 2426th field-effect transistor Q2426 are respectively connected to the voltage port VCC3V3_PMU, ensuring that after the power is turned on, the voltage port is powered on to lower the voltage of the first input terminal and the second input terminal of the converter, ensuring that the circuit is shielded in the sleep or power-on state, so that the opening and closing action of the cover is not affected in the power-on state.

[0034] In summary, the present invention's automatic laptop computer startup circuit, by incorporating specific field-effect transistors (FETs), resistors, capacitors, and a converter U7006 with an XOR gate, achieves a purely hardware-based automatic startup solution, reducing costs while improving response speed and system stability. Specifically, by controlling the speed of voltage rise at the 498th resistor R498 and the 9007th capacitor C9007, the first and second input pins of the converter U7006 generate an interpolation triggering the XOR gate, ensuring that the lid opening action quickly and accurately triggers the startup signal. Therefore, the present invention effectively overcomes the shortcomings of the prior art and possesses high industrial value.

[0035] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the present invention, and all these changes or substitutions should fall within the scope of protection of the present invention.

Claims

1. A circuit for automatically starting a laptop computer, comprising a corresponding Hall sensor and a magnet, wherein the Hall sensor and the magnet are fixed to the host base and the display cover, respectively, and characterized in that: It also includes a 2421st field-effect transistor, a 35th field-effect transistor, a 498th resistor, a 9007th capacitor, a 2422nd field-effect transistor and a converter with an XOR gate. The output pin of the Hall sensor is connected to the gate of the 2421st field-effect transistor, the drain of the 2421st field-effect transistor is connected to the gate of the 35th field-effect transistor, the drain of the 35th field-effect transistor is connected to the gate of the 2422nd field-effect transistor and the connection points are grounded through the 498th resistor and the 9007th capacitor respectively. The first input pin of the converter is connected to the drain of the 2421st field-effect transistor, and the second input pin of the converter is connected to the drain of the 2421st field-effect transistor.

2. The circuit for automatically starting a notebook computer according to claim 1, characterized in that: The capacitance of the 9007th capacitor is 1.0-10uF.

3. The circuit for automatically starting a notebook computer according to claim 1, characterized in that: The device further includes a 638th resistor, one end of which is connected to the drain of the 2421st field effect transistor, and the other end of which is connected to the system voltage terminal.

4. The circuit for automatically starting a notebook computer according to claim 1, characterized in that: It also includes a 2425th field effect transistor and a 2426th field effect transistor, the drain of the 2425th field effect transistor is connected to the drain of the 2421st field effect transistor, the drain of the 2426th field effect transistor is connected to the drain of the 2422nd field effect transistor, and the gates of the 2425th field effect transistor and the 2426th field effect transistor are both connected to a battery power supply.

5. The circuit for automatically starting a notebook computer according to claim 4, characterized in that: It also includes a voltage port VCC3V3_PMU, and the gate of the 2425th field effect transistor and the gate of the 2426th field effect transistor are respectively connected to the voltage port VCC3V3_PMU.

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