CN115549230A - Charging control circuit and terminal - Google Patents
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- H—ELECTRICITY
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- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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Abstract
一种充电控制电路和终端。在降低了无线控制电路的制作成本的情况下,使得终端在没有为其他设备充电时,可以关闭无线充电电路IC2,不会导致电池漏电。
A charging control circuit and terminal. In the case of reducing the production cost of the wireless control circuit, the terminal can turn off the wireless charging circuit IC 2 when it is not charging other devices, so as not to cause battery leakage.
Description
技术领域technical field
本申请涉及电路技术领域,尤其涉及一种充电控制电路和终端。The present application relates to the field of circuit technology, in particular to a charging control circuit and a terminal.
背景技术Background technique
随着智能终端的发展,平板、手机等终端上都可以配备手写笔。其中,平板还可以配备键盘等其他设备。目前,终端可以通过无线充电的方式为手写笔或者键盘等其他设备进行充电。With the development of smart terminals, terminals such as tablets and mobile phones can be equipped with stylus pens. Wherein, the tablet can also be equipped with other devices such as a keyboard. Currently, the terminal can charge other devices such as a stylus or a keyboard through wireless charging.
近年来,通过终端为手写笔或者键盘等其他设备进行无线充电这一技术受到用户青睐,终端可以通过充电控制电路实现为其他设备进行无线充电这一功能。如何在达到无线充电这一目的的同时,降低充电控制电路的成本,是值得研究的方向。In recent years, the technology of wirelessly charging other devices such as stylus pens or keyboards through the terminal has been favored by users. The terminal can realize the function of wirelessly charging other devices through the charging control circuit. How to reduce the cost of the charging control circuit while achieving the purpose of wireless charging is a direction worthy of research.
发明内容Contents of the invention
本申请提供了一种充电控制电路和终端,在降低了无线控制电路的制作成本的情况下,使得终端在没有为其他设备充电时,可以关闭无线充电电路IC2,不会导致电池漏电。The present application provides a charging control circuit and a terminal. In the case of reducing the production cost of the wireless control circuit, the terminal can turn off the wireless charging circuit IC 2 when not charging other devices, without causing battery leakage.
第一方面,本申请提供了一种充电控制电路,该充电控制电路中包括供电及使能控制电路、无线充电电路,该供电及使能控制电路中包括升压BOOST电路,其中:该无线充电电路的输入端与该BOOST电路的输出端连接;该BOOST电路用于向该无线充电电路的输入端传输电池中的电能;该无线充电电路的使能端与该供电及使能控制电路连接;该供电及使能控制电路用于在终端在为其他设备充电的状态下,向该无线充电电路的使能端输入第一控制电压,该第一控制电压小于或者等于该无线充电电路的使能电压;该供电及使能控制电路还用于在该终端在没有为该其他设备充电的状态下,向该无线充电电路的使能端输入第二控制电压,该第二控制电压大于该无线充电电路的使能电压;在该无线充电电路的使能端接收到该第一控制电压以及该第二控制电压的情况下,该无线充电电路的使能端与该供电及使能控制电路之间都为导通状态。In the first aspect, the present application provides a charging control circuit, the charging control circuit includes a power supply and enabling control circuit, and a wireless charging circuit, and the power supply and enabling control circuit includes a boost BOOST circuit, wherein: the wireless charging The input terminal of the circuit is connected to the output terminal of the BOOST circuit; the BOOST circuit is used to transmit the electric energy in the battery to the input terminal of the wireless charging circuit; the enabling terminal of the wireless charging circuit is connected to the power supply and enabling control circuit; The power supply and enabling control circuit is used to input a first control voltage to the enabling terminal of the wireless charging circuit when the terminal is charging other devices, and the first control voltage is less than or equal to the enabling terminal of the wireless charging circuit. voltage; the power supply and enable control circuit is also used to input a second control voltage to the enable terminal of the wireless charging circuit when the terminal is not charging the other device, and the second control voltage is greater than the wireless charging The enable voltage of the circuit; when the enable end of the wireless charging circuit receives the first control voltage and the second control voltage, between the enable end of the wireless charging circuit and the power supply and enable control circuit are in the conduction state.
在上述实施例中,无线充电电路为低电压使能,在无线充电电路接收到的控制电压为第一控制电压时,表示其为低电压,可以使得无线充电电路进入工作状态,这样终端可以为其他设备进行无线充电。在无线充电电路接收到的控制电压为第二控制电压时,表示其为高电压,可以使得无线充电电路关闭,这样终端不可以为其他设备进行无线充电,也不会接收电池传输的电能,则不会导致漏电。In the above embodiment, the wireless charging circuit is enabled for low voltage. When the control voltage received by the wireless charging circuit is the first control voltage, it indicates that it is a low voltage, which can make the wireless charging circuit enter the working state, so that the terminal can be Other devices are charged wirelessly. When the control voltage received by the wireless charging circuit is the second control voltage, it means that it is a high voltage, and the wireless charging circuit can be turned off, so that the terminal cannot wirelessly charge other devices, and will not receive the power transmitted by the battery. It will cause electric leakage.
结合第一方面,在一种实施方式中,该充电控制电路中还包括第一电阻,该无线充电电路的输入端与该BOOST电路的输出端连接,具体包括:该无线充电电路的输入端通过该第一电阻与该BOOST电路的输出端连接。With reference to the first aspect, in an implementation manner, the charging control circuit further includes a first resistor, and the input end of the wireless charging circuit is connected to the output end of the BOOST circuit, specifically including: the input end of the wireless charging circuit passes through The first resistor is connected with the output end of the BOOST circuit.
在上述实施例中,第一电阻可以为实施例中图4所提供的示例性充电控制电路中的R3,利用第一电阻代替原方案中的MOS管M11,第一电阻的成本小于MOS管M11的成本,在达到一样有益效果的同时,可以节约一颗MOS管。In the above embodiment, the first resistor can be R 3 in the exemplary charging control circuit provided in Figure 4 in the embodiment, and the MOS tube M 11 in the original solution is replaced by the first resistor, and the cost of the first resistor is less than that of the MOS The cost of tube M11 can save one MOS tube while achieving the same beneficial effect.
结合第一方面,在一种实施方式中,该供电及使能控制电路中还包括第二电阻、第三电阻、第四电阻以及MOS管,其中:该MOS管的栅极以及该BOOST电路的使能端与电压输入端连接;该MOS管的第源极接地;该MOS管的漏极与该第二电阻的第一端连接;该第二电阻的第二端与该第三电阻的第一端以及该第四电阻的第一端连接;该第三电阻的第一端与该第四电阻的第一端连接;该第三电阻的第二端与该BOOST电路的输出端连接;该第四电阻的第二端与该无线充电电路的使能端连接。With reference to the first aspect, in an implementation manner, the power supply and enable control circuit further includes a second resistor, a third resistor, a fourth resistor, and a MOS transistor, wherein: the gate of the MOS transistor and the gate of the BOOST circuit The enable end is connected to the voltage input end; the first source of the MOS transistor is grounded; the drain of the MOS transistor is connected to the first end of the second resistor; the second end of the second resistor is connected to the first end of the third resistor One end is connected to the first end of the fourth resistor; the first end of the third resistor is connected to the first end of the fourth resistor; the second end of the third resistor is connected to the output end of the BOOST circuit; the The second terminal of the fourth resistor is connected with the enabling terminal of the wireless charging circuit.
在上述实施例中,第二电阻可以为实施例中图4所提供的示例性充电控制电路中的R2,第三电阻可以为实施例中图4所提供的示例性充电控制电路中的R1,第四电阻可以为实施例中图4所提供的示例性充电控制电路中的R4。当无线充电电路的使能电压小于或等于0.3V时,电阻R1的阻值除以电阻R2的阻值的范围可以在20至45之间时,则可以在MOS管导通时,电阻R1以及电阻R2通过串联分压使得A点的电压小于或者等于无线充电电路IC2的使能电压即可。可以在MOS管没有导通时,电阻R1以及电阻R2通过串联分压使得A点的电压大于无线充电电路IC2的使能电压即可。In the above embodiment, the second resistor can be R 2 in the exemplary charging control circuit provided in FIG. 4 in the embodiment, and the third resistor can be R in the exemplary charging control circuit provided in FIG. 4 in the embodiment. 1. The fourth resistor may be R 4 in the exemplary charging control circuit provided in FIG. 4 in the embodiment. When the enabling voltage of the wireless charging circuit is less than or equal to 0.3V, when the resistance value of the resistor R1 divided by the resistance value of the resistor R2 can range from 20 to 45, then the resistor can be turned on when the MOS tube is turned on. R 1 and resistor R 2 divide the voltage in series so that the voltage at point A is less than or equal to the enabling voltage of the wireless charging circuit IC 2 . When the MOS tube is not turned on , resistor R1 and resistor R2 can divide the voltage in series so that the voltage at point A is greater than the enable voltage of the wireless charging circuit IC2.
结合第一方面,在一种实施方式中,该无线充电电路与无线充电线圈连接;该终端在通过该无线充电线圈为其他设备进行充电的状态下,该BOOST电路的使能端接收该电压输入端提供的第三控制电压,该第三控制电压大于或等于该BOOST电路的使能电压;该终端没有处于通过无线充电线圈为其他设备进行充电的状态下,该BOOST电路的使能端接收该电压输入端提供的第四控制电压,该第四控制电压小于该BOOST电路的使能电压。With reference to the first aspect, in one embodiment, the wireless charging circuit is connected to the wireless charging coil; when the terminal is charging other devices through the wireless charging coil, the enabling terminal of the BOOST circuit receives the voltage input The third control voltage provided by the terminal, the third control voltage is greater than or equal to the enabling voltage of the BOOST circuit; when the terminal is not charging other devices through the wireless charging coil, the enabling terminal of the BOOST circuit receives the The fourth control voltage provided by the voltage input end is smaller than the enable voltage of the BOOST circuit.
在上述实施例中,终端可以通过无线充电线圈将电池中的电能传输至其他设备为其他设备进行无线充电,当终端检测到有其他设备通过终端进行无线充电时,可以向电压输入端提供一个第三控制电压,该第三控制电压为高电压,然后,电压输入端向BOOST电路的使能端传输一个该第三控制电压,使得BOOST电路可以处于工作状态,且无线充电电路也处于工作状态,从而使得终端可以为其他设备进行充电。当终端没有检测到有其他设备通过终端进行无线充电时,可以向电压输入端提供一个第四控制电压,该第四控制电压为低电压,然后,电压输入端向BOOST电路的使能端传输一个该第四控制电压,使得BOOST电路可以处于非工作状态,且无线充电电路关闭,从而使得终端可以为其他设备进行充电,也不会导致漏电。In the above embodiment, the terminal can transmit the electric energy in the battery to other devices to wirelessly charge other devices through the wireless charging coil. When the terminal detects that other devices are wirelessly charging through the terminal, it can provide a first Three control voltages, the third control voltage is a high voltage, and then, the voltage input terminal transmits the third control voltage to the enabling terminal of the BOOST circuit, so that the BOOST circuit can be in the working state, and the wireless charging circuit is also in the working state, So that the terminal can charge other devices. When the terminal does not detect that there are other devices performing wireless charging through the terminal, it can provide a fourth control voltage to the voltage input terminal, the fourth control voltage is a low voltage, and then, the voltage input terminal transmits a The fourth control voltage enables the BOOST circuit to be in a non-working state, and the wireless charging circuit is turned off, so that the terminal can charge other devices without causing leakage.
结合第一方面,在一种实施方式中,该MOS管的导通电压与该BOOST电路的使能电压的电压值相同;在该MOS管的栅极接收到的电压大于或等于该BOOST电路的使能电压的情况下,该MOS管导通;在该MOS管的栅极接收到的电压小于该BOOST电路的使能电压的情况下,该MOS管不导通。In combination with the first aspect, in an implementation manner, the turn-on voltage of the MOS transistor is the same as the voltage value of the enable voltage of the BOOST circuit; the voltage received at the gate of the MOS transistor is greater than or equal to the voltage of the BOOST circuit In the case of the enabling voltage, the MOS transistor is turned on; when the voltage received by the gate of the MOS transistor is lower than the enabling voltage of the BOOST circuit, the MOS transistor is not turned on.
结合第一方面,在一种实施方式中,该充电控制电路中还包括N个电阻,该N个电阻的集合与该第三电阻串联进行分压,其中,该N为大于等于1的正整数。With reference to the first aspect, in an implementation manner, the charging control circuit further includes N resistors, and the set of N resistors is connected in series with the third resistor for voltage division, where N is a positive integer greater than or equal to 1 .
在上述实施例中,以N为1为例进行说明,参考实施例中图7,充电控制电路中还可以包括电阻R5,该电阻R5设置在C点到A点之间,与电阻R1串联分压以调整A点的电压。In the above-mentioned embodiment, take N as 1 as an example for illustration. Referring to FIG. 7 in the embodiment, the charging control circuit may further include a resistor R 5 , which is set between point C and point A, and is connected to the resistor R 1 is divided in series to adjust the voltage at point A.
结合第一方面,在一种实施方式中,该第一电阻的阻值等于0欧姆或者接近0欧姆;在该第一电阻的阻值接近0欧姆的情况下,其阻值为50mΩ-100mΩ。With reference to the first aspect, in an implementation manner, the resistance of the first resistor is equal to or close to 0 ohm; when the resistance of the first resistor is close to 0 ohm, its resistance is 50mΩ-100mΩ.
在上述实施例中,第一电阻用于连接无线充电电路的输入端Vin与BOOST电路的输出端Vout,同时,第一电阻的阻值为50mΩ-100mΩ时,不会因为阻值太大,导致电能损耗过大。其中,第一电阻的阻值越小,对电能的损耗越小。例如,接近0时,几乎没有损耗。In the above embodiment, the first resistor is used to connect the input terminal Vin of the wireless charging circuit and the output terminal Vout of the BOOST circuit. At the same time, when the resistance value of the first resistor is 50mΩ-100mΩ, it will not cause the Power loss is too large. Wherein, the smaller the resistance value of the first resistor is, the smaller the loss of electric energy is. For example, close to 0, there is almost no loss.
结合第一方面,在一种实施方式中,该第四电阻的阻值等于0欧姆或者接近0欧姆;在该第一电阻的阻值接近0欧姆的情况下,其阻值为50mΩ-10Ω。With reference to the first aspect, in an implementation manner, the resistance of the fourth resistor is equal to or close to 0 ohm; when the resistance of the first resistor is close to 0 ohm, its resistance is 50mΩ-10Ω.
在上述实施例中,用于连接无线充电电路的使能端Vin与供电及使能控制电路。第四电阻可以用其他的部件代替,例如类似电阻的用于做跳线的导线等,其作用与第四电阻相同。In the above embodiments, it is used to connect the enable terminal Vin of the wireless charging circuit with the power supply and enable control circuit. The fourth resistor can be replaced by other components, such as a wire used as a jumper similar to a resistor, and its function is the same as that of the fourth resistor.
第二方面,本申请提供了一种终端,该终端包括处理器以及充电控制电路,其中:该处理器用于向该充电控制电路输入控制电压;该控制电压可以为前述如第一方面中任一项所描述的第三控制电压或第四控制电压;该充电控制电路为前述如第一方面中任一项所描述的充电控制电路。In a second aspect, the present application provides a terminal, the terminal includes a processor and a charging control circuit, wherein: the processor is used to input a control voltage to the charging control circuit; the control voltage can be any one of the aforementioned first aspects The third control voltage or the fourth control voltage described in Item 1; the charging control circuit is the charging control circuit described in any one of the first aspects.
在上述实施例中,处理器可以与充电控制电路的电压输入端(例如图4中的GPIO)连接,为其提供控制电压。In the above embodiments, the processor may be connected to the voltage input terminal (such as the GPIO in FIG. 4 ) of the charging control circuit to provide it with a control voltage.
结合第二方面,在一种实施方式中,在该处理器向该充电控制电路输入该第三控制电压时,该终端可以为其他设备进行无线充电;在该处理器向该充电控制电路输入该第四控制电压时,该终端不可以为其他设备进行无线充电。With reference to the second aspect, in an implementation manner, when the processor inputs the third control voltage to the charging control circuit, the terminal can perform wireless charging for other devices; when the processor inputs the third control voltage to the charging control circuit When the fourth control voltage is used, the terminal cannot wirelessly charge other devices.
在上述实施例中,当终端检测到有其他设备通过终端进行无线充电时,可以向电压输入端提供一个第三控制电压,该第三控制电压为高电压,这样,终端可以为其他设备进行无线充电。当终端没有检测到其他设备通过终端进行无线充电时,可以向电压输入端提供一个第四控制电压,该第四控制电压为低电压,终端不可以为其他设备进行无线充电。In the above embodiment, when the terminal detects that other devices are wirelessly charged through the terminal, it can provide a third control voltage to the voltage input terminal, and the third control voltage is a high voltage, so that the terminal can wirelessly charge other devices. Charge. When the terminal does not detect that other devices are wirelessly charged through the terminal, it can provide a fourth control voltage to the voltage input terminal, the fourth control voltage is a low voltage, and the terminal cannot perform wireless charging for other devices.
附图说明Description of drawings
图1为终端为手写笔进行无线充电的一个示例性场景;FIG. 1 is an exemplary scenario in which a terminal performs wireless charging for a stylus;
图2为无线充电过程中涉及的原理示意图;Fig. 2 is a schematic diagram of the principles involved in the wireless charging process;
图3为一种方案中涉及的充电控制电路的一个示意图;FIG. 3 is a schematic diagram of a charging control circuit involved in a solution;
图4为本申请实施例中涉及的充电控制电路的一个示意图;Fig. 4 is a schematic diagram of the charging control circuit involved in the embodiment of the present application;
图5为本申请实施例中涉及的一个电压分析图;Fig. 5 is a voltage analysis diagram involved in the embodiment of the present application;
图6为本申请实施例中涉及的另一个电压分析图;Fig. 6 is another voltage analysis diagram involved in the embodiment of the present application;
图7为本申请实施例中涉及的充电控制电路的另一个示意图;FIG. 7 is another schematic diagram of the charging control circuit involved in the embodiment of the present application;
图8是本申请实施例提供的终端的结构示意图。FIG. 8 is a schematic structural diagram of a terminal provided by an embodiment of the present application.
具体实施方式detailed description
本申请以下实施例中所使用的术语只是为了描述特定实施例的目的,而并非旨在作为对本申请的限制。如在本申请的说明书和所附权利要求书中所使用的那样,单数表达形式“一个”、“一种”、“所述”、“上述”、“该”和“这一”旨在也包括复数表达形式,除非其上下文中明确地有相反指示。还应当理解,本申请中使用的术语“和/或”是指并包含一个或多个所列出项目的任何或所有可能组合。The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also Plural expressions are included unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used in this application refers to and includes any and all possible combinations of one or more of the listed items.
以下,术语“第一”、“第二”仅用于描述目的,而不能理解为暗示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征,在本申请实施例的描述中,除非另有说明,“多个”的含义是两个或两个以上。Hereinafter, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as implying or implying relative importance or implicitly specifying the quantity of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the embodiments of the present application, unless otherwise specified, the "multiple" The meaning is two or more.
本申请实施例提供了一种充电控制电路和终端,可以应用于终端为其他设备无线充电的过程中。其中,终端为提供电能的设备,也可以被称为发射端设备(即TX设备)。例如,该终端可以为平板、手机等设备。其他设备为接收电能的设备,也可以被称为接收端设备(即RX设备)。例如,该其他设备可以为手写笔或者键盘等设备。Embodiments of the present application provide a charging control circuit and a terminal, which can be applied to a process in which a terminal wirelessly charges other devices. Wherein, the terminal is a device that provides power, and may also be referred to as a transmitter device (ie, a TX device). For example, the terminal may be a device such as a tablet or a mobile phone. Other devices are devices that receive electric energy, and may also be referred to as receiving end devices (that is, RX devices). For example, the other device may be a device such as a stylus or a keyboard.
本申请实施例中,以其他设备为手写笔为例进行说明。应该理解的是,此处不应该构成对本申请实施例的限定。In the embodiment of the present application, the other device is a stylus as an example for description. It should be understood that this should not constitute a limitation to the embodiment of the present application.
图1为终端为手写笔进行无线充电的一个示例性场景。Fig. 1 is an exemplary scenario where a terminal wirelessly charges a stylus.
图2为无线充电过程中涉及的原理示意图。Fig. 2 is a schematic diagram of the principles involved in the wireless charging process.
为了便于理解,下面先结合图1以及图2对终端为其他设备充电的原理进行说明。For ease of understanding, the principle of the terminal charging other devices will be described below with reference to FIG. 1 and FIG. 2 .
如图1所示,手写笔200中配置有无线充电线圈201。终端100的顶部101设置有无线充电线圈(图中未示出)。用户可以将手写笔200吸附在终端100的顶部101上。进而,终端100的无线充电线圈可以与手写笔200的无线充电线圈进行能量交互,将终端100的电能传输至手写笔200,即向手写笔200进行充电。在终端100为手写笔充电的过程中,终端100中的用户界面中可以显示充电图标102。该充电图标102可以用于提示用户:当前终端100正在为手写笔200进行充电。As shown in FIG. 1 , a
如图2所示,终端100可以包括电池110、充电控制电路111以及无线充电线圈112。手写笔200可以包括电池210、充电控制电路211以及无线充电线圈212。As shown in FIG. 2 , the terminal 100 may include a
在一些可能的情况下,前述涉及的无线充电线圈也可以被称为充电线圈。其中,无线充电线圈112还可以被称为发射线圈,无线充电线圈212还可以被称为接收线圈。In some possible cases, the aforementioned wireless charging coil may also be referred to as a charging coil. Wherein, the
当终端100为手写笔200无线充电时,终端100的充电控制电路111可以从电池110中获取对应的直流电信号。进而,充电控制电路111可以将该直流电信号转换为交变电信号,然后向无线充电线圈112输入该交变电信号。无线充电线圈112响应于该交变电信号,可以产生交变电磁场。When the terminal 100 wirelessly charges the
相应的,手写笔200可以通过无线充电线圈212感应无线充电线圈112发出的交变电磁场,从而产生交变电信号,并向充电控制电路211输入该交变电信号。充电控制电路211可以将该交变电信号整流成直流电信号,并将该直流电信号输入至电池210,为电池210充电,实现无线充电。Correspondingly, the
本申请实施例中,将直流电信号以及交变电信号统称为电信号,也可以被称为电流或者电能等。In the embodiments of the present application, direct current signals and alternating electric signals are collectively referred to as electric signals, and may also be referred to as current or electric energy.
下述实施例中所涉及的电池没有特殊说明则表示为终端的电池,充电控制电路没有特殊说明则表示为终端的充电控制电路,无线充电线圈没有特殊说明则表示为终端的无线充电线圈。The battery involved in the following embodiments is referred to as the battery of the terminal unless otherwise specified, the charging control circuit is referred to as the charging control circuit of the terminal unless otherwise specified, and the wireless charging coil is referred to as the wireless charging coil of the terminal unless otherwise specified.
由前述内容可知,终端要实现为手写笔进行无线充电,则需要终端通过充电控制电路将电池中的电信号传输至无线充电线圈。It can be known from the foregoing that, in order for the terminal to implement wireless charging for the stylus, the terminal needs to transmit the electrical signal in the battery to the wireless charging coil through the charging control circuit.
图3为一种方案中涉及的充电控制电路的一个示意图。FIG. 3 is a schematic diagram of a charging control circuit involved in a scheme.
在一种可能的实现方案中,如图3所示,充电控制电路中可以包括升压BOOST电路IC1、无线充电电路IC2、电阻R11、电阻R12、电阻R13、MOS管M11以及MOS管M12。BOOST电路IC1的输出端Vout通过走线与无线充电电路IC2的输入端Vin连接。无线充电电路IC2的工作条件为低电平使能,即当无线充电电路IC2的使能端nEN接收的控制电压(V11)为低电压时,则可以使得无线充电电路IC2处于工作状态。BOOST电路IC1在不工作时,其输出端Vout的电压近似等于系统电压(3.5V-4.4V)。无线充电电路IC2的输入端Vin的欠压锁定(under voltage lockout,UVLO)电压小于系统电压,可以为2.75V-2.95V之间。In a possible implementation, as shown in Figure 3, the charging control circuit may include a boost boost circuit IC 1 , a wireless charging circuit IC 2 , a resistor R 11 , a resistor R 12 , a resistor R 13 , and a MOS tube M 11 and MOS tube M 12 . The output terminal V out of the BOOST circuit IC 1 is connected to the input terminal V in of the wireless charging circuit IC 2 through wiring. The working condition of the wireless charging circuit IC 2 is low-level enable, that is, when the control voltage (V 11 ) received by the enable terminal nEN of the wireless charging circuit IC 2 is a low voltage, the wireless charging circuit IC 2 can be made to work state. When the BOOST circuit IC 1 is not working, the voltage of its output terminal V out is approximately equal to the system voltage (3.5V-4.4V). The under voltage lockout (under voltage lockout, UVLO) voltage of the input terminal V in of the wireless charging circuit IC 2 is lower than the system voltage, which can be between 2.75V-2.95V.
这里应该理解的是,无线充电电路IC2的使能端nEN的控制电压默认为低电压,即无线充电电路IC2始终满足低电平使能这一状态。其实现方式为:电阻R13的一端与无线充电电路IC2的使能端nEN连接,电阻R13的另一端与终端的系统级芯片(system on chip,SOC)中的第一芯片连接,该第一芯片可以为无线充电电路IC2的使能端nEN的提供低电压使得其可以处于工作状态。其中,该第一芯片可以为终端的处理器(central processing unit,CPU)。It should be understood here that the control voltage of the enable terminal nEN of the wireless charging circuit IC 2 is a low voltage by default, that is, the wireless charging circuit IC 2 always satisfies the state of enabling at a low level. The implementation method is as follows: one end of the resistor R 13 is connected to the enable terminal nEN of the wireless charging circuit IC 2 , and the other end of the resistor R 13 is connected to the first chip in the system-on-chip (SOC) of the terminal. The first chip can provide a low voltage for the enable terminal nEN of the wireless charging circuit IC 2 so that it can be in a working state. Wherein, the first chip may be a processor (central processing unit, CPU) of the terminal.
在电路中不包括MOS管M11的情况下,由于BOOST电路IC1的输出端Vout的电压始终大于无线充电电路IC2的输入端Vin的欠压锁定电压,且,无线充电电路IC2的使能端nEN的控制电压为低电压,则可以使得无线充电电路IC2处于待机状态。在终端没有为其他设备充电的情况下,当无线充电电路IC2处于待机状态时,仍然会使得电池通过BOOST电路IC1向无线充电电路IC2传输电信号,从而导致漏电。在而该方案中,为了解决该漏电问题,则通过添加MOS管M11使得在终端没有为其他设备充电的情况下,关闭该MOS管M11。具体实现方式为:MOS管M11的源极(可以对应图3中的S点)与BOOST电路IC1的输出端Vout连接,MOS管M11的漏极(可以对应图3中的D点)与无线充电电路IC2的输入端Vin连接,MOS管M11的栅极(可以对应图3中的G点)与电阻R12以及电阻R12的一端连接。可以通过电阻R11以及电阻R12控制MOS管M11的栅极的电压,使得该MOS管M11的栅源电压不满足其导通条件,则使得该MOS管M11不导通。其中,栅源电压为栅极的电压与源极的电压之差。通常来说,在该方案中,电阻R12以及电阻R12的阻值可以为10千欧姆(KΩ)即可满足上述描述。 In the case that the MOS transistor M11 is not included in the circuit, since the voltage of the output terminal V out of the BOOST circuit IC 1 is always greater than the undervoltage lockout voltage of the input terminal V in of the wireless charging circuit IC 2 , and the wireless charging circuit IC 2 If the control voltage of the enabling terminal nEN is low, the wireless charging circuit IC 2 can be in a standby state. When the terminal is not charging other devices, when the wireless charging circuit IC 2 is in the standby state, the battery will still transmit electrical signals to the wireless charging circuit IC 2 through the BOOST circuit IC 1 , resulting in power leakage. In this solution, in order to solve the leakage problem, the MOS transistor M 11 is added so that the MOS transistor M 11 is turned off when the terminal is not charging other devices. The specific implementation method is: the source of MOS transistor M11 (which can correspond to point S in Figure 3 ) is connected to the output terminal V out of BOOST circuit IC 1 , and the drain of MOS transistor M11 (which can correspond to point D in Figure 3 ) is connected to the input terminal V in of the wireless charging circuit IC 2 , and the gate of the MOS transistor M 11 (which may correspond to point G in FIG. 3 ) is connected to the resistor R 12 and one end of the resistor R 12 . The voltage of the gate of the MOS transistor M11 can be controlled through the resistor R11 and the resistor R12 , so that the gate-source voltage of the MOS transistor M11 does not meet its conduction condition, so that the MOS transistor M11 is not turned on . Wherein, the gate-source voltage is the difference between the voltage of the gate and the voltage of the source. Generally speaking, in this solution, the resistor R 12 and the resistance value of the resistor R 12 can be 10 kilo-ohms (KΩ) to meet the above description.
这样,可以断开BOOST电路IC1的输出端Vout与无线充电电路IC2的输入端Vin连接,则电池无法通过BOOST电路IC1向无线充电电路IC2传输电信号,使得无线充电电路IC2可以关闭。In this way, the output terminal V out of the BOOST circuit IC 1 can be disconnected from the input terminal V in of the wireless charging circuit IC 2 , and the battery cannot transmit electrical signals to the wireless charging circuit IC 2 through the BOOST circuit IC 1 , so that the wireless charging circuit IC 2 can be turned off.
在本申请实施例中,充电控制电路中使用了其他的部件代替前述涉及的MOS管M11。在降低了无线控制电路的制作成本的情况下,使得终端在没有为其他设备充电时,可以关闭无线充电电路IC2,不会导致电池漏电。In the embodiment of the present application, other components are used in the charging control circuit to replace the aforementioned MOS transistor M 11 . In the case of reducing the manufacturing cost of the wireless control circuit, the terminal can turn off the wireless charging circuit IC 2 when it is not charging other devices, so as not to cause battery leakage.
图4为本申请实施例中涉及的充电控制电路的一个示意图。FIG. 4 is a schematic diagram of the charging control circuit involved in the embodiment of the present application.
如图4所示,充电控制电路中可以包括BOOST电路IC1、无线充电电路IC2、电阻R1、电阻R2、电阻R3、电阻R4以及MOS管M。其中,电阻R3用于连接BOOST电路IC1的输出端Vout与无线充电电路IC2的输入端Vin。电阻R4的一端(也可以被称为第一端)与无线充电电路IC2的使能端nEN连接,电阻R4的另一端(也可以被称为第二端)与电阻R1以及电阻R2的一端连接。电阻R1的另一端与BOOST电路IC1的输出端Vout连接。电阻R2的另一端与MOS管M的漏极(可以对应图4中的D点)连接。该MOS管M的源极(可以对应图4中的S点)接地,该MOS管M的栅极(可以对应图4中的G点)用于输入控制电压V1。MOS管M的栅极以及BOOST电路IC1的使能端EN均与电压输入端(对应图4中的GPIO)连接,该电压输入端GPIO可以由终端的SOC中的第二芯片提供,该第二芯片可以通过该电压输入端GPIO向MOS管M的栅极以及BOOST电路IC1的使能端EN输入控制电压V1。其中,该第二芯片可以与前述涉及的第一芯片相同,也可以不同。例如,该第二芯片可以为CPU。As shown in FIG. 4 , the charging control circuit may include a BOOST circuit IC 1 , a wireless charging circuit IC 2 , a resistor R 1 , a resistor R 2 , a resistor R 3 , a resistor R 4 and a MOS transistor M. Wherein, the resistor R 3 is used to connect the output terminal V out of the BOOST circuit IC 1 and the input terminal V in of the wireless charging circuit IC 2 . One end of the resistor R4 (also referred to as the first end) is connected to the enable terminal nEN of the wireless charging circuit IC 2 , and the other end of the resistor R4 ( also referred to as the second end) is connected to the resistor R1 and the resistor One end of R2 is connected. The other end of the resistor R 1 is connected to the output terminal V out of the BOOST circuit IC 1 . The other end of the resistor R2 is connected to the drain of the MOS transistor M (which may correspond to point D in FIG. 4 ). The source of the MOS transistor M (which may correspond to point S in FIG. 4 ) is grounded, and the gate of the MOS transistor M (which may correspond to point G in FIG. 4 ) is used to input the control voltage V 1 . The gate of the MOS transistor M and the enable terminal EN of the BOOST circuit IC 1 are both connected to the voltage input terminal (corresponding to the GPIO in FIG. 4 ), and the voltage input terminal GPIO can be provided by the second chip in the SOC of the terminal. The second chip can input the control voltage V 1 to the gate of the MOS transistor M and the enable terminal EN of the BOOST circuit IC 1 through the voltage input terminal GPIO. Wherein, the second chip may be the same as or different from the aforementioned first chip. For example, the second chip can be a CPU.
其中,BOOST电路IC1为高电压使能,即BOOST电路IC1的使能端EN接收到的控制电压V1为高电压时,则可以使得无线充电电路IC2处于工作状态。无线充电电路IC2为低电压使能,即无线充电电路IC2的使能端nEN的控制电压为低电压时,则可以使得无线充电电路IC2处于工作状态。Wherein, the BOOST circuit IC 1 is enabled for high voltage, that is, when the control voltage V 1 received by the enable terminal EN of the BOOST circuit IC1 is a high voltage, the wireless charging circuit IC 2 can be in the working state. The wireless charging circuit IC 2 is low-voltage enabled, that is, when the control voltage of the enable terminal nEN of the wireless charging circuit IC 2 is a low voltage, the wireless charging circuit IC 2 can be in a working state.
应该理解的是,无线充电电路IC2的使能端nEN接收的控制电压小于或等于第一阈值电压时,则该控制电压为低电压。无线充电电路IC2的使能端nEN接收的控制电压大于或等于第二阈值电压时,则该控制电压为高电压(不为低电压)。其中,第一阈值电压小于无线充电电路IC2的使能电压,第二电压阈值大于或等于无线充电电路IC2的使能电压。BOOST电路IC1的使能端EN接收的控制电压大于或等于第三阈值电压时,则该控制电压为高电压。BOOST电路IC1的使能端EN接收的控制电压小于或等于第四电压阈值时,则该控制电压为低电压(不为高电压),其中,第三阈值电压大于或等于BOOST电路IC1的使能电压,第四电压阈值小于BOOST电路IC1的使能电压。在一种可能的情况下,无线充电电路IC2的使能电压可以为1.8V,BOOST电路IC1的使能电压可以为0.3V,小于BOOST电路IC1的输出端Vout的电压。It should be understood that when the control voltage received by the enable terminal nEN of the wireless charging circuit IC 2 is less than or equal to the first threshold voltage, the control voltage is a low voltage. When the control voltage received by the enable terminal nEN of the wireless charging circuit IC 2 is greater than or equal to the second threshold voltage, the control voltage is a high voltage (not a low voltage). Wherein, the first threshold voltage is lower than the enabling voltage of the wireless charging circuit IC 2 , and the second voltage threshold is greater than or equal to the enabling voltage of the wireless charging circuit IC 2 . When the control voltage received by the enable terminal EN of the BOOST circuit IC 1 is greater than or equal to the third threshold voltage, the control voltage is a high voltage. When the control voltage received by the enable terminal EN of the BOOST circuit IC 1 is less than or equal to the fourth voltage threshold, the control voltage is a low voltage (not a high voltage), wherein the third threshold voltage is greater than or equal to that of the BOOST circuit IC 1 The enable voltage, the fourth voltage threshold is less than the enable voltage of the BOOST circuit IC 1 . In a possible situation, the enabling voltage of the wireless charging circuit IC 2 can be 1.8V, and the enabling voltage of the BOOST circuit IC 1 can be 0.3V, which is lower than the voltage of the output terminal V out of the BOOST circuit IC 1 .
图4中提供的充电控制电路相比于前述方案中涉及的充电控制电路,有以下两处不同:Compared with the charging control circuit involved in the previous solution, the charging control circuit provided in Figure 4 has the following two differences:
(1)相比于前述图3中示出的充电控制电路,本申请实施例中涉及的充电控制电路中,不包括MOS管M11,而是通过电阻R4连接BOOST电路IC1的输出端Vout与无线充电电路IC2的输入端Vin。这样,使得电池可以通过BOOST电路IC1向无线充电电路IC2输入电信号。(1) Compared with the aforementioned charging control circuit shown in FIG. 3 , the charging control circuit involved in the embodiment of the present application does not include a MOS transistor M 11 , but is connected to the output terminal of the BOOST circuit IC 1 through a resistor R 4 V out and the input terminal V in of the wireless charging circuit IC 2 . In this way, the battery can input electric signals to the wireless charging circuit IC 2 through the BOOST circuit IC 1 .
(2)相比于前述图3中示出的充电控制电路,本申请实施例中涉及的充电控制电路中,不再通过第一芯片(例如处理器)向无线充电电路IC2的使能端nEN输入默认的低电压作为控制电压(如前述图3中的V11)以控制无线充电电路IC2的工作状态。在本申请实施例中,无线充电电路IC2的使能端nEN与供电及使能控制电路连接,用于接收供电及使能控制电路输出的控制电压VB。这样,可以通过该供电及使能控制电路调整无线充电电路IC2的使能端nEN的控制电压,使得该无线充电电路IC2可以处于工作状态或者非工作状态。(2) Compared with the aforementioned charging control circuit shown in FIG. 3 , in the charging control circuit involved in the embodiment of the present application, the first chip (such as a processor) is no longer used to send the wireless charging circuit to the enabling terminal of IC 2 . nEN inputs a default low voltage as a control voltage (such as V 11 in FIG. 3 ) to control the working state of the wireless charging circuit IC 2 . In the embodiment of the present application, the enable terminal nEN of the wireless charging circuit IC 2 is connected to the power supply and enable control circuit for receiving the control voltage V B output by the power supply and enable control circuit. In this way, the control voltage of the enable terminal nEN of the wireless charging circuit IC 2 can be adjusted through the power supply and enabling control circuit, so that the wireless charging circuit IC 2 can be in a working state or a non-working state.
应该理解的是,电阻R1的成本比MOS管M11的成本更低,相比图3以及图4可知,利用电阻R1代替MOS管M11可以节约充电控制电路的制作成本,同时使得终端可以为其他设备进行无线充电,但终端没有为其他设备充电时,可以关闭无线充电电路IC2,不会导致电池漏电。It should be understood that the cost of the resistor R1 is lower than that of the MOS transistor M11 . Compared with FIG. 3 and FIG. Wireless charging can be performed for other devices, but when the terminal is not charging other devices, the wireless charging circuit IC 2 can be turned off to avoid battery leakage.
其中,供电及使能控制电路中包括电阻R4、电阻R1、电阻R2以及MOS管M。其中,电阻R4、电阻R1、电阻R2以及MOS管M的连接关系可以参考前述对该充电控制电路的描述,此处不再赘述。该供电及使能控制电路用于调整无线充电电路IC2的使能端nEN的控制电压。其中,无线充电电路IC2的使能端nEN的控制电压对应图中B点的电压。Wherein, the power supply and enabling control circuit includes a resistor R 4 , a resistor R 1 , a resistor R 2 and a MOS transistor M. Wherein, the connection relationship of the resistor R 4 , the resistor R 1 , the resistor R 2 and the MOS transistor M can refer to the foregoing description of the charging control circuit, and will not be repeated here. The power supply and enable control circuit is used to adjust the control voltage of the enable terminal nEN of the wireless charging circuit IC 2 . Wherein, the control voltage of the enable terminal nEN of the wireless charging circuit IC 2 corresponds to the voltage at point B in the figure.
该电阻R4的一端与无线充电电路IC2的使能端nEN连接,该电阻R4的另一端对应A点。记A点的电压为VA,记B点的电压为VB,这里可以理解的是,VA=VB。后续通过讨论A点的电压VA代替讨论B点的电压VB。在A点的电压为低电压的情况下,B点的电压同样为低电压,则无线充电电路IC2的使能端nEN接收到的控制电压(VB)为低电压,此时,无线充电电路IC2可以处于工作状态或待机状态。在A点的电压为高电压的情况下,B点的电压同样为高电压,则无线充电电路IC2的使能端nEN接收到的控制电压(VB)为高电压,此时,无线充电电路IC2可以处于关闭状态。 One end of the resistor R4 is connected to the enable terminal nEN of the wireless charging circuit IC2 , and the other end of the resistor R4 corresponds to point A. Record the voltage at point A as VA, and record the voltage at point B as V B . It can be understood here that VA = V B . Subsequent discussion of the voltage V A at the point A will replace the voltage V B at the point B. When the voltage at point A is low voltage, the voltage at point B is also low voltage, then the control voltage (V B ) received by the enable terminal nEN of wireless charging circuit IC 2 is low voltage, at this time, wireless charging The circuit IC 2 can be in a working state or a standby state. When the voltage at point A is a high voltage, the voltage at point B is also a high voltage, and the control voltage (V B ) received by the enable terminal nEN of the wireless charging circuit IC 2 is a high voltage. At this time, wireless charging Circuit IC 2 may be in an off state.
前述涉及的无线充电电路IC2可以处于工作状态是指,终端可以为手写笔进行无线充电,需要满足的条件包括以下两个条件:The wireless charging circuit IC 2 mentioned above can be in the working state, which means that the terminal can wirelessly charge the stylus, and the conditions to be met include the following two conditions:
条件1:无线充电电路IC2的输入端Vin与BOOST电路IC1的输出端Vout之间是导通的,可以接收到电池输出的供电(即可以接收到电池的电能)。且无线充电电路IC2的输入端Vin的电压大于或等于第一工作电压,该第一工作电压的取值大于BOOST电路IC1处于关闭状态时,BOOST电路IC1的输出端Vout的电压。Condition 1: The input terminal Vin of the wireless charging circuit IC 2 is connected to the output terminal Vout of the BOOST circuit IC 1 , and can receive power from the battery output (that is, can receive battery power). And the voltage of the input terminal Vin of the wireless charging circuit IC 2 is greater than or equal to the first working voltage, and the value of the first working voltage is greater than the voltage of the output terminal Vout of the BOOST circuit IC 1 when the BOOST circuit IC 1 is in the off state.
条件2:无线充电电路IC2的使能端nEN接收的控制电压为低电压。Condition 2: The control voltage received by the enable terminal nEN of the wireless charging circuit IC 2 is a low voltage.
前述涉及的无线充电电路IC2可以处于关闭状态是指,终端可以为手写笔进行无线充电,需要满足的条件可以为下述条件3或者条件4中的至少一个:The wireless charging circuit IC 2 mentioned above can be in the closed state, which means that the terminal can wirelessly charge the stylus, and the conditions to be met can be at least one of the following conditions 3 or 4:
条件3:前述涉及的条件2不成立,即无线充电电路IC2的使能端nEN接收的控制电压为高电压。Condition 3: the aforementioned condition 2 is not satisfied, that is, the control voltage received by the enable terminal nEN of the wireless charging circuit IC 2 is a high voltage.
条件4:无线充电电路IC2的输入端Vin与BOOST电路IC1之间不是导通的。Condition 4: The input terminal Vin of the wireless charging circuit IC 2 is not connected to the BOOST circuit IC 1 .
前述涉及的无线充电电路IC2可以处于待机状态是指,终端不可以为手写笔进行无线充电,但会消耗电池中的电量,是本申请实施例要避免的状态。无线充电电路IC2处于待机状态的描述可以参考前述对图3的描述,此处不再赘述。The wireless charging circuit IC 2 mentioned above can be in the standby state, which means that the terminal cannot wirelessly charge the stylus, but it will consume the power in the battery, which is the state to be avoided in the embodiment of the present application. For the description of the wireless charging circuit IC 2 being in the standby state, reference may be made to the foregoing description of FIG. 3 , which will not be repeated here.
本申请实施例中,需要使得终端未处于为手写笔充电的状态下,使得无线充电电路IC2可以处于关闭状态,这样可以使得无线充电电路IC2不可以接收电池中的电信号,不会导致电池漏电。In the embodiment of this application, it is necessary to make the terminal not in the state of charging the stylus, so that the wireless charging circuit IC 2 can be in the off state, so that the wireless charging circuit IC 2 can not receive the electrical signal in the battery, and will not cause The battery is leaking.
应该理解的是,图4中示出的充电控制电路中,不论终端是否处于为手写笔充电的情况下,前述涉及的条件4始终都是不可以满足的,其原因在于:无线充电电路IC2的输出端Vout的电压近似等于系统电压(3.5V-4.4V),但是无线充电电路IC2的输入端Vin的欠压锁定电压(可以为2.75V-2.95V之间)小于该系统电压。BOOST电路IC1的输出端Vout与无线充电电路IC2的输入端Vin通过电阻R3连接。这表示BOOST电路IC1的输出端Vout与无线充电电路IC2的输入端Vin之间存在电压差且为通路。在这样的情况下,在终端没有处于为手写笔充电的状态时,可以通过使得条件3成立,从而使得无线充电电路IC2可以关闭,不会导致漏电。It should be understood that, in the charging control circuit shown in FIG. 4 , regardless of whether the terminal is charging the stylus, the aforementioned condition 4 cannot always be satisfied because the wireless charging circuit IC 2 The voltage of the output terminal V out of the wireless charging circuit IC 2 is approximately equal to the system voltage (3.5V-4.4V), but the undervoltage lockout voltage of the input terminal V in of the wireless charging circuit IC 2 (can be between 2.75V-2.95V) is less than the system voltage . The output terminal V out of the BOOST circuit IC 1 is connected to the input terminal V in of the wireless charging circuit IC 2 through a resistor R 3 . This means that there is a voltage difference between the output terminal V out of the BOOST circuit IC 1 and the input terminal V in of the wireless charging circuit IC 2 and is a path. In such a case, when the terminal is not in the state of charging the stylus, the wireless charging circuit IC 2 can be turned off by making condition 3 true, without causing leakage.
应该理解的是,在终端处于为手写笔充电的状态包括但不限于以下场景:It should be understood that the state where the terminal is charging the stylus includes but is not limited to the following scenarios:
场景1:如前述图1所示,手写笔吸附到终端则表示终端处于为手写笔充电的状态。一种可能的方式是终端通过无线充电线圈为手写笔进行充电。Scenario 1: As shown in Figure 1 above, if the stylus is attached to the terminal, it means that the terminal is charging the stylus. One possible way is that the terminal charges the stylus through the wireless charging coil.
场景2:终端可以设置一个收容装置,该收容装置中可用于容纳手写笔,当用户将该手写笔置于该收容装置时则表示终端处于为手写笔充电的状态。一种可能的方式是终端通过无线充电线圈为手写笔进行充电。Scenario 2: The terminal can be provided with a storage device, which can be used to accommodate a stylus, and when the user places the stylus in the storage device, it means that the terminal is in a state of charging the stylus. One possible way is that the terminal charges the stylus through the wireless charging coil.
应该理解的是,在如图4所示的充电控制电路中,终端处于为手写笔充电的状态可以是终端通过无线充电线圈为手写笔充电的状态。It should be understood that, in the charging control circuit shown in FIG. 4 , the state where the terminal is charging the stylus may be the state where the terminal is charging the stylus through the wireless charging coil.
下面结合图4中示出的充电控制电路,分别描述终端在没有为其他设备充电时,可以关闭无线充电电路IC2,不会导致电池漏电的原理以及终端通过该充电控制电路为手写笔充电时的工作原理进行描述。The following describes the principle that the terminal can turn off the wireless charging circuit IC 2 without causing battery leakage when the terminal is not charging other devices, and the terminal charges the stylus through the charging control circuit. The working principle is described.
对于终端没有为其他设备充电时,可以关闭无线充电电路IC2,不会导致电池漏电的原理,可以参考如下描述。For the principle that the wireless charging circuit IC 2 can be turned off when the terminal is not charging other devices without causing battery leakage, please refer to the following description.
在终端没有处于为手写笔充电的状态时,只需要使得前述涉及的条件3(即条件2不成立)成立即可以实现关闭无线充电电路IC2。其中,条件3成立即是使无线充电电路IC2的使能端nEN接收的控制电压不为低电压(为高电压)。When the terminal is not in the state of charging the stylus, it is only necessary to make the aforementioned condition 3 (that is, the condition 2 not satisfied) be satisfied and the wireless charging circuit IC 2 can be turned off immediately. Wherein, when the condition 3 is met, the control voltage received by the enable terminal nEN of the wireless charging circuit IC 2 is not a low voltage (is a high voltage).
在图4中涉及的控制电路中,使得无线充电电路IC2的使能端nEN接收的控制电压不为低电压的原理可以参考如下描述。In the control circuit involved in FIG. 4 , the principle of making the control voltage received by the enable terminal nEN of the wireless charging circuit IC 2 not be a low voltage can refer to the following description.
在一种可能的实现方式中,MOS管M可以为NMOS管。该NMOS管导通的条件为:MOS管M在栅源电压大于或等于导通电压时会导通。其中,栅源电压为栅极的电压与源极的电压之差。则MOS管M导通的条件可以表示为:In a possible implementation manner, the MOS transistor M may be an NMOS transistor. The condition for the NMOS transistor to be turned on is: the MOS transistor M will be turned on when the gate-source voltage is greater than or equal to the conduction voltage. Wherein, the gate-source voltage is the difference between the voltage of the gate and the voltage of the source. Then the condition for the conduction of the MOS transistor M can be expressed as:
Vgs(M)>Vth(M) 公式(1)V gs (M)>V th (M) formula (1)
其中,公式(1)中,Vgs(M)表示MOS管M的栅源电压。其中,Vgs(M)=Vg(M)-Vs(M),Vg(M)表示MOS管M的栅极电压,Vs(M)表示MOS管M的源极电压。Vth(M)表示MOS管M的导通电压。该导通电压的电压值可以设置为与BOOST电路IC1的使能电压的电压值相同。Wherein, in the formula (1), V gs (M) represents the gate-source voltage of the MOS transistor M. Wherein, V gs (M)=V g (M)−V s (M), V g (M) represents the gate voltage of the MOS transistor M, and V s (M) represents the source voltage of the MOS transistor M. V th (M) represents the turn-on voltage of the MOS transistor M. The voltage value of the turn-on voltage can be set to be the same as the voltage value of the enable voltage of the BOOST circuit IC 1 .
在终端没有为其他设备充电的情况下,终端的SOC可以为MOS管M的栅极所连接的电压输入端GPIO输入一个低电压(也可以被称为第一电压),使得MOS管M的栅极电压为该第一电压。该第一电压小于或等于BOOST电路IC1的使能电压,由于BOOST电路IC1的使能电压等于MOS管M的导通电压,则Vg(M)<Vth(M)。此时,由于MOS管M的源极接地,则该MOS管M的源极电压为0V,则Vs(M)=0V。由此可知,MOS管M的栅源电压小于导通电压,即Vgs(M)<Vth(M),则该MOS管M不导通。则此时A点的电压VA等于BOOST电路IC1的输出端Vout的电压。结合前述可知,无线充电电路IC2的使能端nEN接收的控制电压(即B点的电压VB)等于A点的电压VA,则无线充电电路IC2的使能端nEN接收的控制电压等于BOOST电路IC1的输出端Vout的电压。这样,无线充电电路IC2的使能端nEN接收的控制电压大于或者等于第二阈值电压(即该控制电压为高电压,条件2不成立),使得无线充电电路IC2可以处于关闭状态,不会导致漏电。When the terminal is not charging other devices, the SOC of the terminal can input a low voltage (also referred to as the first voltage) to the voltage input terminal GPIO connected to the gate of the MOS transistor M, so that the gate of the MOS transistor M The pole voltage is the first voltage. The first voltage is less than or equal to the enable voltage of BOOST circuit IC 1 , since the enable voltage of BOOST circuit IC 1 is equal to the turn-on voltage of MOS transistor M, then V g (M)<V th (M). At this time, since the source of the MOS transistor M is grounded, the source voltage of the MOS transistor M is 0V, and V s (M)=0V. It can be seen that, if the gate-source voltage of the MOS transistor M is lower than the turn-on voltage, that is, V gs (M)<V th (M), the MOS transistor M is not turned on. Then the voltage V A at point A at this time is equal to the voltage of the output terminal V out of the BOOST circuit IC 1 . In combination with the foregoing, it can be seen that the control voltage received by the enabling terminal nEN of the wireless charging circuit IC 2 (ie, the voltage V B at point B ) is equal to the voltage VA at point A , then the control voltage received by the enabling terminal nEN of the wireless charging circuit IC 2 It is equal to the voltage of the output terminal V out of the BOOST circuit IC 1 . In this way, the control voltage received by the enable terminal nEN of the wireless charging circuit IC 2 is greater than or equal to the second threshold voltage (that is, the control voltage is a high voltage, and condition 2 is not established), so that the wireless charging circuit IC 2 can be in the off state, and will not cause leakage.
在一种可能的实现方式中,终端的SOC可以为MOS管M的栅极所连接的电压输入端GPIO输入一个第一电压的方式包括:MOS管M的栅极与电压输入端GPIO连接,该电压输入端GPIO可以由终端的SOC中的第二芯片提供。在终端未处于为手写笔无线充电的状态时,该第二芯片可以通过该电压输入端GPIO向MOS管M的栅极输入第一电压。In a possible implementation manner, the SOC of the terminal can input a first voltage to the voltage input terminal GPIO connected to the gate of the MOS transistor M, including: the gate of the MOS transistor M is connected to the voltage input terminal GPIO, the The voltage input terminal GPIO can be provided by the second chip in the SOC of the terminal. When the terminal is not in the state of wirelessly charging the stylus, the second chip can input the first voltage to the gate of the MOS transistor M through the voltage input terminal GPIO.
其中,B点的电压VB等于BOOST电路IC1的输出端Vout的电压的分析过程可以参考下述描述。Wherein, the analysis process of the voltage V B at point B being equal to the voltage of the output terminal V out of the BOOST circuit IC 1 can refer to the following description.
如图5所述,BOOST电路IC1的输出端Vout对应图5中的C点,MOS管M的漏极所连接的接地点对应图5中的D点,图4中示出的充电控制电路中的A点以及B点分别与图5中的A点以及B点对应。As shown in Figure 5, the output terminal V out of the BOOST circuit IC 1 corresponds to point C in Figure 5, the ground point connected to the drain of the MOS transistor M corresponds to point D in Figure 5, and the charging control shown in Figure 4 Point A and point B in the circuit correspond to point A and point B in FIG. 5 , respectively.
在MOS管M未导通的情况下,C点经过A点到D点的电路处于断路状态,C点经过A点到B点的电路处于导通状态,则A点的电压大小由C点经过A点到B点的电路决定。由于C点到B点之间没有电压差,所述电阻R1、电阻R4不会分压,则VB与VA相等且与C点的电压VC相等,VC为BOOST电路IC1的输出端Vout的电压,该电压可以记为Vout′。When the MOS transistor M is not turned on, the circuit from point C passing through point A to point D is in an open circuit state, and the circuit passing through point A to point B at point C is in a conducting state, then the voltage at point A passes through point C The circuit from point A to point B is determined. Since there is no voltage difference between point C and point B, the resistors R 1 and R 4 will not divide the voltage, then V B is equal to VA and the voltage V C at point C , and V C is the BOOST circuit IC 1 The voltage at the output terminal V out , which can be denoted as Vout'.
对于终端通过该充电控制电路为手写笔充电的工作原理,可以参考如下描述。For the working principle of charging the stylus by the terminal through the charging control circuit, reference may be made to the following description.
在终端处于为手写笔充电的状态下,需要使得前述涉及的条件1和条件2都成立才可以实现为手写笔进行充电。When the terminal is in the state of charging the stylus, the stylus can be charged only when the aforementioned conditions 1 and 2 are satisfied.
其中,使得条件1成立的描述可以参考下述描述。Wherein, the description of making condition 1 satisfied can refer to the following description.
当BOOST电路IC1处于工作状态时则可以使得条件1成立,其中,BOOST电路IC1处于工作状态是指BOOST电路IC1的使能端EN可以到一个高电压(也可以被称为第二电压),使得BOOST电路IC1的输出端Vout的电压可以从系统电压(3.5V-4.4V)提升至第二工作电压,该第二工作电压大于无线充电电路IC2的输入端Vin的第一工作电压,当电阻R3的阻值为0Ω或者接近0Ω,例如为50mΩ-100mΩ的情况下,可以使得无线充电电路IC2的输入端Vin的电压约等于第二工作电压(大于第一工作电压),使得条件1成立。其中,电阻R3的阻值为0Ω或者接近0Ω,其作用在于连接无线充电电路的输入端Vin与BOOST电路的输出端Vout,同时,不会因为阻值太大,导致电信号损耗过大,这样,可以使得终端处于为手写笔无线充电的状态下,无线充电电路IC2的输入端Vin的电压更接近BOOST电路IC1的第二工作电压,使得可以达到无线充电电路IC2的输入端Vin的第一工作电压,使得无线充电电路IC2进入工作状态,将接收到的电池的电信号传输至无线充电线圈。When the BOOST circuit IC 1 is in the working state, the condition 1 can be established. Wherein, the BOOST circuit IC 1 is in the working state, which means that the enabling terminal EN of the BOOST circuit IC 1 can reach a high voltage (also referred to as the second voltage ), so that the voltage of the output terminal Vout of the BOOST circuit IC 1 can be raised from the system voltage (3.5V-4.4V) to a second working voltage, which is greater than the first working voltage of the input terminal Vin of the wireless charging circuit IC 2 voltage, when the resistance value of the resistor R3 is 0Ω or close to 0Ω, such as 50mΩ-100mΩ, the voltage at the input terminal Vin of the wireless charging circuit IC 2 can be approximately equal to the second operating voltage (greater than the first operating voltage), so that condition 1 holds. Among them, the resistance value of the resistor R3 is 0Ω or close to 0Ω, and its function is to connect the input terminal Vin of the wireless charging circuit and the output terminal Vout of the BOOST circuit. In this way, the terminal can be in the state of wireless charging for the stylus, and the voltage of the input terminal Vin of the wireless charging circuit IC 2 is closer to the second working voltage of the BOOST circuit IC 1 , so that the voltage of the input terminal Vin of the wireless charging circuit IC 2 can be reached. The first working voltage makes the wireless charging circuit IC 2 enter the working state, and transmits the received electric signal of the battery to the wireless charging coil.
其中,条件2成立即是使无线充电电路IC2的使能端nEN接收的控制电压为低电压。使得条件2成立的描述可以参考下述描述。Wherein, when condition 2 is met, the control voltage received by the enable terminal nEN of the wireless charging circuit IC 2 is a low voltage. The description of making condition 2 hold can refer to the following description.
在图4中涉及的充电控制电路中,使得无线充电电路IC2的使能端nEN接收的控制电压为低电压的原理可以参考如下描述。In the charging control circuit involved in FIG. 4 , the principle of making the control voltage received by the enable terminal nEN of the wireless charging circuit IC 2 a low voltage can be referred to the following description.
图4中示出的充电控制电路中的MOS管M为前述涉及的NMOS管。关于该NMOS管的介绍与前述相同,可以参考前述描述,此处不再赘述。The MOS transistor M in the charging control circuit shown in FIG. 4 is the aforementioned NMOS transistor. The introduction about the NMOS transistor is the same as the foregoing description, and reference may be made to the foregoing description, which will not be repeated here.
在一种可能的实现方式中,终端中可以设置一个霍尔传感器,响应于手写笔吸附到终端上的操作,该霍尔传感器可以通过SOC向MOS管M的栅极所连接的电压输入端GPIO输入一个高电压(也可以被称为第二电压),使得MOS管M的栅极电压为该第二电压。该第二电压大于或等于BOOST电路IC1的使能电压,由于BOOST电路IC1的使能电压等于MOS管M的导通电压,则Vg(M)>Vth(M)。此时,由于MOS管M的源极接地,则该MOS管M的源极电压为0V,则Vs(M)=0V。由此可知,MOS管M的栅源电压大于导通电压,即Vgs(M)>Vth(M),则该MOS管M导通。则此时A点的电压VA可以小于或者等于无线充电电路IC2的使能端nEN的使能电压。结合前述可知,无线充电电路IC2的使能端nEN接收的控制电压(即B点的电压VB)等于A点的电压VA,则无线充电电路IC2的使能端nEN接收的控制电压小于或者等于无线充电电路IC2的使能电压。这样,无线充电电路IC2的使能端nEN接收的控制电压小于或者等于第一阈值电压(即该控制电压为低电压,条件2成立),使得无线充电电路IC2可以处于工作状态,则条件1与条件2都成立,终端可以为手写笔进行充电。In a possible implementation, a Hall sensor can be set in the terminal, and in response to the operation of attaching the stylus to the terminal, the Hall sensor can send the voltage input terminal GPIO connected to the gate of the MOS transistor M through the SOC. A high voltage (also referred to as a second voltage) is input so that the gate voltage of the MOS transistor M is the second voltage. The second voltage is greater than or equal to the enabling voltage of the BOOST circuit IC 1 , since the enabling voltage of the BOOST circuit IC 1 is equal to the conduction voltage of the MOS transistor M, then V g (M)>V th (M). At this time, since the source of the MOS transistor M is grounded, the source voltage of the MOS transistor M is 0V, and V s (M)=0V. It can be seen from this that the gate-source voltage of the MOS transistor M is greater than the turn-on voltage, that is, V gs (M)>V th (M), then the MOS transistor M is turned on. Then the voltage V A at point A at this time may be less than or equal to the enable voltage of the enable terminal nEN of the wireless charging circuit IC 2 . In combination with the foregoing, it can be seen that the control voltage received by the enabling terminal nEN of the wireless charging circuit IC 2 (ie, the voltage V B at point B ) is equal to the voltage VA at point A , then the control voltage received by the enabling terminal nEN of the wireless charging circuit IC 2 Less than or equal to the enabling voltage of the wireless charging circuit IC 2 . In this way, the control voltage received by the enable terminal nEN of the wireless charging circuit IC 2 is less than or equal to the first threshold voltage (that is, the control voltage is a low voltage, and condition 2 is satisfied), so that the wireless charging circuit IC 2 can be in the working state, then the condition 1 and condition 2 are both satisfied, the terminal can charge the stylus.
在一种可能的实现方式中,终端的SOC可以为MOS管M的栅极所连接的电压输入端GPIO输入一个第二电压的方式包括:MOS管M的栅极与电压输入端GPIO连接,该电压输入端GPIO可以由终端的SOC中的第二芯片提供。在终端处于为手写笔无线充电的状态时,该第二芯片可以通过该电压输入端GPIO向MOS管M的栅极输入第二电压。In a possible implementation, the SOC of the terminal can input a second voltage to the voltage input terminal GPIO connected to the gate of the MOS transistor M, including: the gate of the MOS transistor M is connected to the voltage input terminal GPIO, the The voltage input terminal GPIO can be provided by the second chip in the SOC of the terminal. When the terminal is in the state of wirelessly charging the stylus, the second chip can input a second voltage to the gate of the MOS transistor M through the voltage input terminal GPIO.
其中,B点的电压VB小于或者等于无线充电电路IC2的使能电压的分析过程可以参考下述描述。Wherein, the analysis process that the voltage V B at point B is less than or equal to the enable voltage of the wireless charging circuit IC 2 can refer to the following description.
如图6所述,BOOST电路IC1的输出端Vout对应图6中的C点,MOS管M的漏极所连接的接地点对应图6中的D点,图4中示出的充电控制电路中的A点以及B点分别与图6中的A点以及B点对应。As shown in Figure 6, the output terminal V out of the BOOST circuit IC 1 corresponds to point C in Figure 6, the ground point connected to the drain of the MOS transistor M corresponds to point D in Figure 6, and the charging control shown in Figure 4 Point A and point B in the circuit correspond to point A and point B in FIG. 6 , respectively.
在MOS管M导通的情况下,C点经过A点到B点的电路处于导通状态但是没有电压差,但是,C点经过A点到D点的电路处于导通状态且存在电压差,则A点的电压大小由C点经过A点到D点的电路决定。C点的电压VC为BOOST电路IC1的输出端Vout的电压,该电压可以记为Vout′,即VC=Vout。D点接地,则D点的电压VD=0V。C点经过A点到D点的电路中,存在电阻R1以及电阻R2串联分压,则A点的电压可以参考下述公式(2)。When the MOS tube M is turned on, the circuit from point C passing through point A to point B is in a conducting state but there is no voltage difference, but the circuit from point C passing through point A to point D is in a conducting state and there is a voltage difference. Then the voltage at point A is determined by the circuit from point C through point A to point D. The voltage V C at point C is the voltage of the output terminal V out of the BOOST circuit IC 1 , and this voltage can be denoted as Vout′, that is, V C =V out . Point D is grounded, and the voltage at point D is V D =0V. In the circuit from point C through point A to point D, there is resistor R1 and resistor R2 in series to divide the voltage, then the voltage at point A can refer to the following formula ( 2 ).
上述公式(2)中,Vout′表示BOOST电路IC1的输出端Vout的电压,R′1表示电阻R1的阻值大小,R′2表示电阻R2的阻值大小。In the above formula ( 2 ), Vout' represents the voltage of the output terminal V out of the BOOST circuit IC1, R'1 represents the resistance value of the resistor R1, and R'2 represents the resistance value of the resistor R2.
参考公式(2)可知,可以通过配置电阻R1的阻值大小以及电阻R2的阻值大小来调节B点的电压,使其小于或者等于无线充电电路IC2的使能电压,例如,R′1=150KΩ,R′2=4.7KΩ。电阻R1的阻值大小以及电阻R2的阻值大小还可以有其他的配置值,例如,R′1=160KΩ,R′2=5KΩ,再例如,当无线充电电路的使能电压小于或等于0.3V时,电阻R1的阻值除以电阻R2的阻值的范围可以在20至45之间。可以实现电阻R1以及电阻R2通过串联分压使得A点的电压小于或者等于无线充电电路IC2的使能电压即可。本申请实施例对电阻R1的阻值大小以及电阻R2的阻值大小不作限定,只要可以在MOS管M导通时,电阻R1以及电阻R2通过串联分压使得A点的电压小于或者等于无线充电电路IC2的使能电压即可。Referring to the formula ( 2 ), it can be seen that the voltage at point B can be adjusted by configuring the resistance value of the resistor R1 and the resistance value of the resistor R2 so that it is less than or equal to the enabling voltage of the wireless charging circuit IC2, for example, R ' 1 =150KΩ, R' 2 =4.7KΩ. The resistance value of the resistor R 1 and the resistance value of the resistor R 2 can also have other configuration values, for example, R′ 1 =160KΩ, R′ 2 =5KΩ, and for example, when the enabling voltage of the wireless charging circuit is less than or When it is equal to 0.3V, the resistance value of the resistor R1 divided by the resistance value of the resistor R2 may range from 20 to 45. It can be achieved that the resistor R1 and the resistor R2 can divide the voltage in series so that the voltage at point A is less than or equal to the enable voltage of the wireless charging circuit IC2 . The embodiment of the present application does not limit the resistance value of the resistor R1 and the resistance value of the resistor R2, as long as the resistor R1 and the resistor R2 can divide the voltage in series so that the voltage at point A is less than Or equal to the enabling voltage of the wireless charging circuit IC 2 .
在一种可能的实现方式中,无线充电电路IC2的使能电压可以设置为0.5V,在R′1=150KΩ,R′2=4.7KΩ的情况下,A点的电压可以为0.15V,由于B点的电压等于A点的电压,则使得无线充电电路IC2接收到的控制电压(0.15V)小于无线充电电路IC2的使能电压(0.5V),则无线充电电路IC2处于工作状态,可以接收电池传输的电信号,为手写笔进行充电。In a possible implementation, the enabling voltage of the wireless charging circuit IC 2 can be set to 0.5V, and in the case of R' 1 =150KΩ, R' 2 =4.7KΩ, the voltage at point A can be 0.15V, Since the voltage at point B is equal to the voltage at point A, the control voltage (0.15V) received by the wireless charging circuit IC 2 is less than the enabling voltage (0.5V) of the wireless charging circuit IC 2 , and the wireless charging circuit IC 2 is in operation state, it can receive the electrical signal transmitted by the battery to charge the stylus.
应该理解的是,无线充电电路IC2的使能电压可以设置为0.5V为举例说明,不应该构成对本申请实施例限定,也可以设置为其他的值,例如0.4V等,本申请实施例对此不作限定。It should be understood that the enabling voltage of the wireless charging circuit IC 2 can be set to 0.5V as an example, which should not be construed as limiting the embodiment of the present application, and can also be set to other values, such as 0.4V, etc. This is not limited.
应该理解的是,前述涉及的霍尔传感器只是举例说明,用于检测终端是否处于为手写笔进行充电的状态,在其他情况下,还可以用其他的部件代替该霍尔传感器,例如压力传感器,当手写笔吸附到终端上的时候,该压力传感器可以检测到重力的变化,从而该压力传感器可以通过SOC向MOS管M的栅极所连接的电压输入端GPIO输入一个第二电压。还可以为其他的部件,本申请实施例对此不作限定。It should be understood that the aforementioned Hall sensor is only an example for detecting whether the terminal is in the state of charging the stylus. In other cases, the Hall sensor can also be replaced by other components, such as a pressure sensor. When the stylus is attached to the terminal, the pressure sensor can detect the change of gravity, so that the pressure sensor can input a second voltage to the voltage input terminal GPIO connected to the gate of the MOS transistor M through the SOC. It may also be other components, which are not limited in this embodiment of the present application.
应该理解的是,前述图4中示出的充电控制电路只是一个示例性说明,还可以有其他的示例,可以利用其他能达到相同目的的部件代替其中的一个或多个部件。该充电控制电路中的多个部件也可以进行组合。该充电控制电路的其他示例可以参考下述描述:It should be understood that the charging control circuit shown in FIG. 4 is just an example, and there may be other examples, and one or more components may be replaced by other components that can achieve the same purpose. Multiple components in the charging control circuit can also be combined. Other examples of the charging control circuit can refer to the following description:
其他示例1:前述图4中示出的充电控制电路中的MOS管M除了可以是NMOS管以外,还可以是其他的部件。例如,可以为单刀双掷开关,其作用与MOS管M一致,用于控制电阻R2与D点是否连接。其中,可以设置单刀双掷开关接收到的控制电压大于或者等于BOOST电路IC1的使能电压时,使得电阻R2与D点连接,该单刀双掷开关接收到的控制电压小于BOOST电路IC1的使能电压时,使得电阻R2与D点不连接。Other Example 1: The MOS transistor M in the charging control circuit shown in FIG. 4 may be other components besides the NMOS transistor. For example, it can be a single-pole double-throw switch, whose function is consistent with that of the MOS tube M, and is used to control whether the resistor R 2 is connected to point D. Wherein, it can be set that when the control voltage received by the SPDT switch is greater than or equal to the enabling voltage of BOOST circuit IC 1 , the resistor R 2 is connected to point D, and the control voltage received by the SPDT switch is lower than that of BOOST circuit IC 1 When the enabling voltage is enabled, the resistor R2 is not connected to point D.
其他示例2:前述图4的示出C点到A点之间,除了可以包括电阻R1以外,还可以包括其他的N个电阻,该N个电阻可以与电阻R1串联分压以调整A点的电压。其中,N为大于等于1的正整数。以N为1为例进行说明,参考图7,充电控制电路中还可以包括电阻R5,该电阻R5设置在C点到A点之间,与电阻R1串联分压以调整A点的电压。在一种可能的实现方式中,如果在图4中示出的充电控制电路中,电阻R1的阻值为M,则在图5中示出的充电控制电路中,则R1的阻值加上R2的阻值等于M,则可以使得图5中示出的充电控制电路与图4中示出的充电控制电路具有相同的功能。Other example 2: As shown in Figure 4 above, between point C and point A, in addition to the resistor R 1 , other N resistors can be included, and the N resistors can be divided in series with the resistor R 1 to adjust the voltage of A point voltage. Wherein, N is a positive integer greater than or equal to 1. Taking N as 1 as an example for illustration, referring to Figure 7 , the charging control circuit may also include a resistor R5, which is set between point C and point A , and is connected in series with resistor R1 to divide the voltage to adjust the voltage of point A. Voltage. In a possible implementation, if in the charging control circuit shown in FIG. 4 , the resistance value of resistor R1 is M, then in the charging control circuit shown in FIG. 5 , the resistance value of R1 is Adding that the resistance value of R 2 is equal to M, the charging control circuit shown in FIG. 5 can have the same function as the charging control circuit shown in FIG. 4 .
其他示例3:前述图4中涉及的电阻R3可以为其他的部件,例如类似电阻的用于做跳线的导线等,其作用与电阻R3相同,用于连接无线充电电路的输入端Vin与BOOST电路的输出端Vout,同时,不会因为阻值太大,导致电信号损耗过大。再例如,可以使得无线充电电路的输入端Vin与BOOST电路的输出端Vout直接通过走线连接,中间不连接其他的部件。Other example 3: the resistor R 3 involved in the aforementioned Figure 4 can be other components, such as a wire used as a jumper similar to a resistor, etc., which has the same function as the resistor R 3 and is used to connect to the input terminal Vin of the wireless charging circuit At the same time as the output terminal Vout of the BOOST circuit, the electrical signal loss will not be too large due to the resistance value being too large. For another example, the input terminal Vin of the wireless charging circuit may be directly connected to the output terminal Vout of the BOOST circuit through wiring without connecting other components in between.
其他示例4:前述图4中涉及的电阻R4的阻值为0Ω或者接近0Ω,例如为50mΩ-10Ω,其阻值可以比电阻R3更大。电阻R4用于连接无线充电电路的使能端Vin与供电及使能控制电路。R4可以用其他的部件代替,例如类似电阻的用于做跳线的导线等,其作用与电阻R4相同。Other example 4: the resistance value of the resistor R 4 involved in the foregoing FIG. 4 is 0Ω or close to 0Ω, for example, 50mΩ-10Ω, and its resistance value may be greater than that of the resistor R 3 . The resistor R4 is used to connect the enable terminal Vin of the wireless charging circuit with the power supply and enable control circuit. R 4 can be replaced by other components, such as wires used as jumpers similar to resistors, and its function is the same as that of resistor R 4 .
本申请实施例中,BOOST电路IC1也可以被称为BOOST电路,同理,其他的中文后包括英文的名词也可以只用前面的中文替代。例如,无线充电电路IC2也可以被称为无线充电电路,电压输入端GPIO也可以被称为电压输入端等。电阻R1也可以被称为第三电阻,电阻R2也可以被称为第二电阻,电阻R3也可以被称为第一电阻,电阻R4也可以被称为第四电阻。任一电阻的一端可以被称为该电阻的第一端,不该第一端不同的一端则可以被称为第二端。例如,第二电阻(R2)的一端可以被称为第一端,该第二电阻的另一端可以被称为第二端。第一阈值电压也可以被称为第一控制电压,第二阈值电压也可以被称为第二控制电压,第三控制电压也可以被称为第三控制电压,第四阈值电压也可以被称为第四控制电压。In the embodiment of the present application, the BOOST circuit IC 1 can also be called a BOOST circuit. Similarly, other Chinese terms including English can also be replaced by only the preceding Chinese. For example, the wireless charging circuit IC 2 may also be called a wireless charging circuit, and the voltage input terminal GPIO may also be called a voltage input terminal. The resistor R1 can also be called the third resistor, the resistor R2 can also be called the second resistor, the resistor R3 can also be called the first resistor, and the resistor R4 can also be called the fourth resistor. One end of any resistor may be referred to as a first end of the resistor, and the end different from the first end may be referred to as a second end. For example, one end of the second resistor (R 2 ) may be referred to as a first end, and the other end of the second resistor may be referred to as a second end. The first threshold voltage may also be referred to as a first control voltage, the second threshold voltage may also be referred to as a second control voltage, the third control voltage may also be referred to as a third control voltage, and the fourth threshold voltage may also be referred to as is the fourth control voltage.
终端除了为手写笔进行充电时可以使用本申请实施例中涉及的充电控制电路以外,为其他设备进行充电时可以使用本申请实施例中涉及的充电控制电路,本申请实施例只是以手写笔为例进行举例说明,不应该构成对本申请实施例的限定。例如,该其他设备可以为键盘。In addition to charging the stylus, the terminal can use the charging control circuit involved in the embodiment of the present application, and can use the charging control circuit involved in the embodiment of the present application when charging other devices. The embodiment of the present application only uses the stylus as the Examples are used for illustration and should not be construed as limiting the embodiments of the present application. For example, the other device may be a keyboard.
下面介绍本申请实施例提供的示例性终端。An exemplary terminal provided by the embodiment of the present application is introduced below.
图8是本申请实施例提供的终端的结构示意图。FIG. 8 is a schematic structural diagram of a terminal provided by an embodiment of the present application.
下面以终端为例对实施例进行具体说明。应该理解的是,终端可以具有比图中所示的更多的或者更少的部件,可以组合两个或多个的部件,或者可以具有不同的部件配置。图中所示出的各种部件可以在包括一个或多个信号处理和/或专用集成电路在内的硬件、软件、或硬件和软件的组合中实现。The following uses a terminal as an example to describe the embodiment in detail. It should be understood that a terminal may have more or fewer components than shown in the figures, may combine two or more components, or may have a different configuration of components. The various components shown in the figures may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application specific integrated circuits.
终端可以包括:处理器110,外部存储器接口120,内部存储器121,通用串行总线(universal serial bus,USB)接口130,充电管理模块140,电池142,天线1,天线2,移动通信模块150,无线通信模块160,音频模块170,扬声器170A,受话器170B,麦克风170C,耳机接口170D,传感器模块180,按键190,马达191,指示器192,摄像头193,显示屏194以及用户标识模块(subscriber identification module,SIM)卡接口195等。The terminal may include: a
可以理解的是,本申请实施例示意的结构并不构成对终端的具体限定。在本申请另一些实施例中,终端可以包括比图示更多或更少的部件,或者组合某些部件,或者拆分某些部件,或者不同的部件布置。图示的部件可以以硬件,软件或软件和硬件的组合实现。It can be understood that, the structure shown in the embodiment of the present application does not constitute a specific limitation on the terminal. In some other embodiments of the present application, the terminal may include more or fewer components than shown in the figure, or combine certain components, or separate certain components, or arrange different components. The illustrated components can be realized in hardware, software or a combination of software and hardware.
处理器110可以包括一个或多个处理单元,例如:处理器110可以包括应用处理器(application processor,AP),调制解调处理器,图形处理器(graphics processingunit,GPU),图像信号处理器(image signal processor,ISP),控制器,存储器,视频编解码器,数字信号处理器(digital signal processor,DSP),基带处理器,和/或神经网络处理器(neural-network processing unit,NPU)等。其中,不同的处理单元可以是独立的器件,也可以集成在一个或多个处理器中。The
其中,控制器可以是终端的神经中枢和指挥中心。控制器可以根据指令操作码和时序信号,产生操作控制信号,完成取指令和执行指令的控制。Wherein, the controller may be the nerve center and command center of the terminal. The controller can generate an operation control signal according to the instruction opcode and timing signal, and complete the control of fetching and executing the instruction.
处理器110中还可以设置存储器,用于存储指令和数据。在一些实施例中,处理器110中的存储器为高速缓冲存储器。该存储器可以保存处理器110刚用过或循环使用的指令或数据。如果处理器110需要再次使用该指令或数据,可从所述存储器中直接调用。避免了重复存取,减少了处理器110的等待时间,因而提高了系统的效率。A memory may also be provided in the
在一些实施例中,处理器110可以包括一个或多个接口。接口可以包括集成电路(inter-integrated circuit,I2C)接口,集成电路内置音频(inter-integrated circuitsound,I2S)接口,脉冲编码调制(pulse code modulation,PCM)接口,用户标识模块(subscriber identity module,SIM)接口,和/或通用串行总线(universal serial bus,USB)接口等。In some embodiments,
可以理解的是,本申请实施例示意的各模块间的接口连接关系,只是示意性说明,并不构成对终端的结构限定。在本申请另一些实施例中,终端也可以采用上述实施例中不同的接口连接方式,或多种接口连接方式的组合。It can be understood that the interface connection relationship between the modules shown in the embodiment of the present application is only a schematic illustration, and does not constitute a structural limitation of the terminal. In other embodiments of the present application, the terminal may also adopt different interface connection modes in the above embodiments, or a combination of multiple interface connection modes.
充电管理模块140用于从充电器接收充电输入。其中,充电器可以是无线充电器,也可以是有线充电器。The charging management module 140 is configured to receive a charging input from a charger. Wherein, the charger may be a wireless charger or a wired charger.
充电管理模块140包括充电控制电路140A、无线充电线圈140B等模块。The charging management module 140 includes modules such as a charging control circuit 140A, a
其中,充电控制电路140A可以与电池142以及无线充电线圈140B连接,用于为其他设备进行无线充电。Wherein, the charging control circuit 140A can be connected with the battery 142 and the
终端的无线通信功能可以通过天线1,天线2,移动通信模块150,无线通信模块160,调制解调处理器以及基带处理器等实现。The wireless communication function of the terminal can be realized by the antenna 1, the antenna 2, the
天线1和天线2用于发射和接收电磁波信号。终端中的每个天线可用于覆盖单个或多个通信频带。不同的天线还可以复用,以提高天线的利用率。Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in the terminal can be used to cover single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization of the antennas.
移动通信模块150可以提供应用在终端上的包括2G/3G/4G/5G等无线通信的解决方案。移动通信模块150可以包括至少一个滤波器,开关,功率放大器,低噪声放大器(lownoise amplifier,LNA)等。The
调制解调处理器可以包括调制器和解调器。其中,调制器用于将待发送的低频基带信号调制成中高频信号。解调器用于将接收的电磁波信号解调为低频基带信号。A modem processor may include a modulator and a demodulator. Wherein, the modulator is used for modulating the low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low frequency baseband signal.
无线通信模块160可以提供应用在终端上的包括无线局域网(wireless localarea networks,WLAN)(如无线保真(wireless fidelity,Wi-Fi)网络),蓝牙(bluetooth,BT)等。The wireless communication module 160 can provide applications on the terminal including wireless local area networks (wireless local area networks, WLAN) (such as wireless fidelity (wireless fidelity, Wi-Fi) network), bluetooth (bluetooth, BT) and so on.
在一些实施例中,终端的天线1和移动通信模块150耦合,天线2和无线通信模块160耦合,使得终端可以通过无线通信技术与网络以及其他设备通信。所述无线通信技术可以包括全球移动通讯系统(global system for mobile communications,GSM),通用分组无线服务(general packet radio service,GPRS)等。In some embodiments, the antenna 1 of the terminal is coupled to the
终端通过GPU,显示屏194,以及应用处理器等实现显示功能。GPU为图像处理的微处理器,连接显示屏194和应用处理器。GPU用于执行数学和几何计算,用于图形渲染。处理器110可包括一个或多个GPU,其执行程序指令以生成或改变显示信息。The terminal implements the display function through the GPU, the display screen 194, and the application processor. The GPU is a microprocessor for image processing, and is connected to the display screen 194 and the application processor. GPUs are used to perform mathematical and geometric calculations for graphics rendering.
显示屏194用于显示图像,视频等。显示屏194包括显示面板。The display screen 194 is used to display images, videos and the like. The display screen 194 includes a display panel.
终端可以通过ISP,摄像头193,视频编解码器,GPU,显示屏194以及应用处理器等实现拍摄功能。The terminal can realize the shooting function through the ISP, the camera 193, the video codec, the GPU, the display screen 194, and the application processor.
ISP用于处理摄像头193反馈的数据。The ISP is used for processing the data fed back by the camera 193 .
摄像头193用于捕获静态图像或视频。物体通过镜头生成光学图像投射到感光元件。感光元件可以是电荷耦合器件(charge coupled device,CCD)或互补金属氧化物半导体(complementary metal-oxide-semiconductor,CMOS)光电晶体管。Camera 193 is used to capture still images or video. The object generates an optical image through the lens and projects it to the photosensitive element. The photosensitive element may be a charge coupled device (charge coupled device, CCD) or a complementary metal-oxide-semiconductor (complementary metal-oxide-semiconductor, CMOS) phototransistor.
数字信号处理器用于处理数字信号,除了可以处理数字图像信号,还可以处理其他数字信号。例如,当终端在频点选择时,数字信号处理器用于对频点能量进行傅里叶变换等。Digital signal processors are used to process digital signals. In addition to digital image signals, they can also process other digital signals. For example, when the terminal selects a frequency point, the digital signal processor is used to perform Fourier transform on the energy of the frequency point.
视频编解码器用于对数字视频压缩或解压缩。终端可以支持一种或多种视频编解码器。这样,终端可以播放或录制多种编码格式的视频,例如:动态图像专家组(movingpicture experts group,MPEG)1,MPEG2,MPEG3,MPEG4等。Video codecs are used to compress or decompress digital video. An endpoint can support one or more video codecs. In this way, the terminal can play or record videos in various encoding formats, for example: moving picture experts group (moving picture experts group, MPEG) 1, MPEG2, MPEG3, MPEG4, and so on.
NPU为神经网络(neural-network,NN)计算处理器,通过借鉴生物神经网络结构,例如借鉴人脑神经元之间传递模式,对输入信息快速处理,还可以不断的自学习。The NPU is a neural-network (NN) computing processor. By referring to the structure of biological neural networks, such as the transfer mode between neurons in the human brain, it can quickly process input information and continuously learn by itself.
内部存储器121可以包括一个或多个随机存取存储器(random access memory,RAM)和一个或多个非易失性存储器(non-volatile memory,NVM)。The internal memory 121 may include one or more random access memories (random access memory, RAM) and one or more non-volatile memories (non-volatile memory, NVM).
随机存取存储器可以包括静态随机存储器(static random-access memory,SRAM)、动态随机存储器(dynamic random access memory,DRAM)、同步动态随机存储器(synchronous dynamic random access memory,SDRAM)、双倍资料率同步动态随机存取存储器(double data rate synchronous dynamic random access memory,DDR SDRAM,例如第五代DDR SDRAM一般称为DDR5 SDRAM)等;Random access memory may include static random-access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (synchronous dynamic random access memory, SDRAM), double data rate synchronous Dynamic random access memory (double data rate synchronous dynamic random access memory, DDR SDRAM, such as the fifth generation DDR SDRAM is generally called DDR5 SDRAM), etc.;
非易失性存储器可以包括磁盘存储器件、快闪存储器(flash memory)。Non-volatile memory may include magnetic disk storage devices, flash memory (flash memory).
快闪存储器按照运作原理划分可以包括NOR FLASH、NAND FLASH、3D NAND FLASH等,按照存储单元电位阶数划分可以包括单阶存储单元(single-level cell,SLC)、多阶存储单元(multi-level cell,MLC)等,按照存储规范划分可以包括通用闪存存储(英文:universal flash storage,UFS)、嵌入式多媒体存储卡(embedded multi media Card,eMMC)等。According to the operating principle, flash memory can include NOR FLASH, NAND FLASH, 3D NAND FLASH, etc. According to the potential order of storage cells, it can include single-level storage cells (single-level cell, SLC), multi-level storage cells (multi-level cell, MLC), etc., which may include universal flash storage (English: universal flash storage, UFS), embedded multimedia memory card (embedded multi media Card, eMMC) etc. according to storage specifications.
随机存取存储器可以由处理器110直接进行读写,可以用于存储操作系统或其他正在运行中的程序的可执行程序(例如机器指令),还可以用于存储用户及应用程序的数据等。The random access memory can be directly read and written by the
非易失性存储器也可以存储可执行程序和存储用户及应用程序的数据等,可以提前加载到随机存取存储器中,用于处理器110直接进行读写。The non-volatile memory can also store executable programs and data of users and application programs, etc., and can be loaded into the random access memory in advance for the
外部存储器接口120可以用于连接外部的非易失性存储器,实现扩展终端的存储能力。The
终端可以通过音频模块170,扬声器170A,受话器170B,麦克风170C,耳机接口170D,以及应用处理器等实现音频功能。例如音乐播放,录音等。The terminal can implement audio functions through the
音频模块170用于将数字音频信息转换成模拟音频信号输出,也用于将模拟音频输入转换为数字音频信号。音频模块170还可以用于对音频信号编码和解码。The
扬声器170A,也称“喇叭”,用于将音频电信号转换为声音信号。终端可以通过扬声器170A收听音乐,或收听免提通话。
受话器170B,也称“听筒”,用于将音频电信号转换成声音信号。当终端接听电话或语音信息时,可以通过将受话器170B靠近人耳接听语音。
麦克风170C,也称“话筒”,“传声器”,用于将声音信号转换为电信号。The
耳机接口170D用于连接有线耳机。The
传感器模块180可以包括压力传感器、磁传感器、指纹传感器以及触摸传感器等传感器。The sensor module 180 may include sensors such as a pressure sensor, a magnetic sensor, a fingerprint sensor, and a touch sensor.
其中,压力传感器可以用于感受压力信号,可以将压力信号转换成电信号。Among them, the pressure sensor can be used to sense the pressure signal, and can convert the pressure signal into an electrical signal.
磁传感器包括霍尔传感器。磁传感器可以用于响应于手写笔吸附到终端上的操作,通过SOC向MOS管M的栅极所连接的电压输入端GPIO输入一个高电压(也可以被称为第二电压)。Magnetic sensors include Hall sensors. The magnetic sensor can be used to input a high voltage (also referred to as a second voltage) to the voltage input terminal GPIO connected to the gate of the MOS transistor M through the SOC in response to the operation of attaching the stylus to the terminal.
指纹传感器用于采集指纹。终端可以利用采集的指纹特性实现指纹解锁,访问应用锁,指纹拍照,指纹接听来电等。The fingerprint sensor is used to collect fingerprints. The terminal can use the collected fingerprint features to unlock fingerprints, access application locks, take pictures with fingerprints, answer incoming calls with fingerprints, etc.
触摸传感器,也称“触控面板”。触摸传感器180K可以设置于显示屏194,由触摸传感器180K与显示屏194组成触摸屏,也称“触控屏”。Touch sensor, also known as "touch panel". The touch sensor 180K can be disposed on the display screen 194, and the touch sensor 180K and the display screen 194 form a touch screen, also called a “touch screen”.
按键190包括开机键,音量键等。按键190可以是机械按键。也可以是触摸式按键。终端可以接收按键输入,产生与终端的用户设置以及功能控制有关的键信号输入。The keys 190 include a power key, a volume key and the like. The key 190 may be a mechanical key. It can also be a touch button. The terminal can receive key input and generate key signal input related to user settings and function control of the terminal.
马达191可以产生振动提示。The motor 191 can generate a vibrating reminder.
指示器192可以是指示灯,可以用于指示充电状态,电量变化,也可以用于指示消息,未接来电,通知等。The indicator 192 can be an indicator light, and can be used to indicate charging status, power change, and can also be used to indicate messages, missed calls, notifications, and the like.
SIM卡接口195用于连接SIM卡。The
在一些实施例中,前述涉及的充电控制电路可以与处理器耦接,可以用于向充电控制电路的电压输入端GPIO输入控制电压。在一种可能的实现方式中,在终端处于为其他设备而充电的状态下,该控制电压可以为前述涉及的第三阈值电压(高电压),这样,终端可以为其他设备进行无线充电。在终端处于没有为其他设备而充电的状态下,该控制电压可以为前述涉及的第四阈值电压(低电压)这样,终端不可以为其他设备进行无线充电。In some embodiments, the charging control circuit mentioned above can be coupled with the processor, and can be used to input the control voltage to the voltage input terminal GPIO of the charging control circuit. In a possible implementation, when the terminal is charging other devices, the control voltage may be the aforementioned third threshold voltage (high voltage), so that the terminal can wirelessly charge other devices. When the terminal is not charging other devices, the control voltage may be the aforementioned fourth threshold voltage (low voltage), so that the terminal cannot wirelessly charge other devices.
应该理解的是,本申请实施例中提供的充电控制电路除了可以设置在终端中以外,还可以设置在其他的充电装置中,以用于实现无线充电,且不会导致无线充电电路的漏电问题。It should be understood that the charging control circuit provided in the embodiment of the present application can be installed in other charging devices in addition to being installed in the terminal, so as to realize wireless charging without causing leakage of the wireless charging circuit. .
以上所述,以上实施例仅用以说明本申请的技术方案,而非对其限制;尽管参照前述实施例对本申请进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still understand the foregoing The technical solutions described in each embodiment are modified, or some of the technical features are replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the various embodiments of the application.
上述实施例中所用,根据上下文,术语“当…时”可以被解释为意思是“如果…”或“在…后”或“响应于确定…”或“响应于检测到…”。类似地,根据上下文,短语“在确定…时”或“如果检测到(所陈述的条件或事件)”可以被解释为意思是“如果确定…”或“响应于确定…”或“在检测到(所陈述的条件或事件)时”或“响应于检测到(所陈述的条件或事件)”。As used in the above embodiments, depending on the context, the term "when" may be interpreted to mean "if" or "after" or "in response to determining..." or "in response to detecting...". Similarly, depending on the context, the phrases "in determining" or "if detected (a stated condition or event)" may be interpreted to mean "if determining..." or "in response to determining..." or "on detecting (a stated condition or event)" or "in response to detecting (a stated condition or event)".
在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输,例如,所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线)或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质,(例如,软盘、硬盘、磁带)、光介质(例如DVD)、或者半导体介质(例如固态硬盘)等。In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, optical fiber, DSL) or wireless (eg, infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, solid state hard disk), etc.
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程,该流程可以由计算机程序来指令相关的硬件完成,该程序可存储于计算机可读取存储介质中,该程序在执行时,可包括如上述各方法实施例的流程。而前述的存储介质包括:ROM或随机存储记忆体RAM、磁碟或者光盘等各种可存储程序代码的介质。Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments are realized. The processes can be completed by computer programs to instruct related hardware. The programs can be stored in computer-readable storage media. When the programs are executed , may include the processes of the foregoing method embodiments. The aforementioned storage medium includes: ROM or random access memory RAM, magnetic disk or optical disk, and other various media that can store program codes.
Claims (10)
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CN202210088744.8A CN115549230B (en) | 2022-01-25 | 2022-01-25 | A charging control circuit and terminal |
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Address after: Unit 3401, unit a, building 6, Shenye Zhongcheng, No. 8089, Hongli West Road, Donghai community, Xiangmihu street, Futian District, Shenzhen, Guangdong 518040 Patentee after: Honor Terminal Co.,Ltd. Country or region after: China Address before: 3401, unit a, building 6, Shenye Zhongcheng, No. 8089, Hongli West Road, Donghai community, Xiangmihu street, Futian District, Shenzhen, Guangdong Patentee before: Honor Device Co.,Ltd. Country or region before: China |