Remote controller low-electric-quantity power supply control circuit and remote controller

Abstract

The utility model discloses a remote controller low-electric-quantity power supply control circuit and a remote controller, and relates to the technical field of remote controller control circuits. The low-electric-quantity power supply control circuit of the remote controller comprises a power supply module, a first control module, a main chip, a second control module and a backlight module, the power supply module is used for outputting power supply voltage; the input end of the first control module is connected with the output end of the power supply module; the input end of the boosting module is connected with the output end of the first control module; the boosting module is used for boosting the power supply voltage and outputting the boosted power supply voltage; the input end of the main chip is connected with the output end of the boosting module; the input end of the second control module is connected with the output end of the boosting module; the input end of the backlight module is connected with the output end of the second control module. Power can be supplied to the main chip and the backlight module at the same time under the condition that the battery is low in electric quantity, the service life of the power supply module is prolonged, and user experience is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of remote control circuit, and particularly relates to a remote control low-power supply control circuit and a remote control. BACKGROUND

[0002] With the increasingly fierce competition in the household appliance industry, manufacturers are more and more strict in controlling the manufacturing cost. Alkaline batteries are often used as the batteries of remote controls by household appliance manufacturers due to their large capacity and long service life, but the cost of alkaline batteries is high. At present, in order to reduce the manufacturing cost of remote controls, alkaline batteries are usually replaced by carbon-zinc batteries. However, the capacity of carbon-zinc batteries is small, and the service life is short, which greatly reduces the user experience. When the power of the carbon-zinc battery is low, the power consumption of the battery low-voltage boost circuit, the backlight module and other related devices will increase, causing the main chip to automatically reset and unable to normally turn on the remote control control, and it is difficult to simultaneously supply power to the backlight module, and the user experience is poor. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art.

[0004] To this end, the present application provides a remote control low-power supply control circuit and a remote control, which can simultaneously supply power to the main chip and the backlight module under the condition of low battery power, prolong the service life of the power supply module, and improve the user experience.

[0005] In a first aspect, the embodiments of the present application provide a remote control low-power supply control circuit, comprising:

[0006] a power supply module, configured to output a power supply voltage;

[0007] a first control module, an input end of the first control module being connected with an output end of the power supply module;

[0008] a boost module, an input end of the boost module being connected with an output end of the first control module; the boost module is configured to increase the power supply voltage and output an increased power supply voltage;

[0009] a main chip, an input end of the main chip being connected with an output end of the boost module;

[0010] a second control module, an input end of the second control module being connected with an output end of the boost module;

[0011] a backlight module, an input end of the backlight module being connected with an output end of the second control module.

[0012] According to the low power supply control circuit of the remote controller provided by the first aspect of the present application, at least the following beneficial effects are achieved: when the power supply module is in a low power state that is insufficient to support normal operation of the main chip, the power supply voltage output by the power supply module is input to the voltage boosting module after passing through the first control module, the voltage boosting module increases the voltage of the power supply voltage, and outputs the power supply voltage after the voltage is increased, on the one hand, the power supply voltage is output to the main chip to enable the main chip to operate normally, and on the other hand, the power supply voltage is output to the backlight module after passing through the second control module to enable the backlight module to operate normally; thereby prolonging the service life of the power supply module and improving the user experience. That is to say, the low power supply control circuit of the remote controller provided by the present application can increase the power supply voltage in the low power state, and supply power to the main chip and the backlight module at the same time, so as to ensure that the main chip of the remote controller will not be reset actively and maintain normal operation in the low power state, and the backlight module can also operate normally, thereby prolonging the service life of the power supply battery and improving the user experience.

[0013] According to some embodiments of the present application, the first control module comprises a second resistor, a third resistor, an energy storage unit and a first switch tube; the emitter of the first switch tube is connected with the output end of the power supply module; the base of the first switch tube is connected with a first IO port through the second resistor, and the first IO port is used for inputting an external low level control signal; the collector of the first switch tube is connected with a first end of the energy storage unit through the third resistor; a second end of the energy storage unit is connected with an input end of the voltage boosting module.

[0014] According to some embodiments of the present application, the energy storage unit comprises:

[0015] a first inductor, a first end of the first inductor is connected with one end of the third resistor, and a second end of the first inductor is connected with the input end of the voltage boosting module as an output end;

[0016] a third capacitor, one end of the third capacitor is connected between the third resistor and the first end of the first inductor, and the other end of the third capacitor is grounded.

[0017] According to some embodiments of the present application, the voltage boosting module comprises a voltage boosting control chip and a first filter unit, the input end of the voltage boosting control chip is connected with the second end of the energy storage unit; the first filter unit is connected between the output end of the voltage boosting control chip and the ground.

[0018] According to some embodiments of the present application, the first filter unit comprises a first filter capacitor and a second filter capacitor connected in parallel.

[0019] According to some embodiments of the present application, the voltage boosting module comprises: a second inductor, a diode, and a second switch tube; a base of the second switch tube is connected with a second IO port; a collector of the second switch tube is connected with a second end of the energy storage unit through the second inductor, and the collector of the second switch tube is also connected with an anode of the diode; an emitter of the second switch tube is grounded; and a cathode of the diode is connected with an input end of the second control module.

[0020] According to some embodiments of the present application, the voltage boosting module further comprises: a second filter unit, which is connected between the cathode of the diode and the ground.

[0021] According to some embodiments of the present application, the second control module comprises: a fourth resistor and a third switch tube; a base of the third switch tube is connected with a third IO port through the fourth resistor, an emitter of the third switch tube is connected with an output end of the voltage boosting module, and a collector of the third switch tube is connected with the backlight module; and the third IO port is configured to input a low-level control signal to the third switch tube when a key of the remote controller is triggered, and input a high-level control signal to the third switch tube when the key of the remote controller is not triggered.

[0022] According to some embodiments of the present application, the first switch tube, the second switch tube, and the third switch tube are all PNP type triodes.

[0023] In a second aspect, the embodiments of the present application provide a remote controller, comprising the remote controller low-power supply control circuit according to any one of the embodiments of the first aspect.

[0024] According to the remote controller provided by the embodiments of the second aspect of the present application, at least the following beneficial effects are achieved: when the power supply module is in a low-power state that is insufficient to support the normal operation of the main chip, the remote controller utilizes the remote controller low-power supply control circuit, the power supply voltage output by the power supply module is input to the voltage boosting module after passing through the first control module, the voltage boosting module increases the voltage of the power supply voltage, and outputs the power supply voltage with the increased voltage, on one hand, the power supply voltage is output to the main chip to make the main chip operate normally, and on the other hand, the power supply voltage is output to the backlight module after passing through the second control module to make the backlight module work normally; thereby prolonging the service life of the power supply module and improving the user experience. That is to say, the remote controller provided by the embodiments of the present application can increase the power supply voltage in the low-power state by utilizing the remote controller low-power supply control circuit, and supply power to the main chip and the backlight module at the same time, so as to ensure that the main chip of the remote controller will not be reset actively and maintain normal operation in the low-power state, and the backlight module can also work normally, thereby prolonging the service life of the power supply battery and improving the user experience.

[0025] Other features and advantages of the present application will be set forth in the description that follows, and in part will be apparent from the description, or can be learned by practice of the application. The purposes and other advantages of the present application will be realized and attained by the structure particularly pointed out in the description and the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of a low-power supply control circuit of a remote controller provided by an embodiment of the present application;

[0027] Figure 2 is a schematic diagram of the specific circuit structure of a boost module provided by an embodiment of the present application;

[0028] Figure 3 is a schematic diagram of the specific circuit structure of a boost module provided by another embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the purposes, technical solutions and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments.

[0030] It should be noted that although the logical order is shown in the flowchart in the description of the present application, in some cases, the steps shown or described can be performed in an order different from that in the flowchart. In the description of the present application, the meaning of "one or more" is one or more, and the meaning of "multiple" is two or more. The description of "first", "second" is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application, and are not intended to limit the present application.

[0032] The application discloses a remote controller low-power supply control circuit and a remote controller, and relates to the technical field of remote controller control circuits. The remote controller low-power supply control circuit comprises a power supply module, a first control module, a main chip, a second control module and a backlight module. The power supply module is used for outputting a power supply voltage. The input end of the first control module is connected with the output end of the power supply module. The input end of a voltage boosting module is connected with the output end of the first control module. The voltage boosting module is used for boosting the power supply voltage and outputting the boosted power supply voltage. The input end of the main chip is connected with the output end of the voltage boosting module. The input end of the second control module is connected with the output end of the voltage boosting module. The input end of the backlight module is connected with the output end of the second control module. The application can supply power to the main chip and the backlight module simultaneously under the condition of low battery power, prolong the service life of the power supply module and improve the user experience.

[0033] The application embodiments are further described below with reference to the drawings.

[0034] Reference Figures 1 to 3 In a first aspect, the application provides a remote controller low-power supply control circuit 100, which comprises a power supply module 110, a first control module 120, a voltage boosting module 130, a main chip 140, a second control module 150 and a backlight module 160. The specific functions of the modules and the connection relationship between the modules are described as follows.

[0035] The power supply module 110 is used for outputting a power supply voltage. The input end of the first control module 120 is connected with the output end of the power supply module 110. The input end of the voltage boosting module 130 is connected with the output end of the first control module 120. The voltage boosting module 130 is used for boosting the power supply voltage and outputting the boosted power supply voltage. The input end of the main chip 140 is connected with the output end of the voltage boosting module 130. The input end of the second control module 150 is connected with the output end of the voltage boosting module 130. The input end of the backlight module 160 is connected with the output end of the second control module 150.

[0036] Specifically, the power supply module 110 is a carbon-zinc battery. It can be understood that the carbon-zinc battery has a small capacity and a short service life. When the power of the carbon-zinc battery decreases, the power supply voltage also decreases.

[0037] It can be understood that the first control module 120 is configured to control the on-off state of the path between the output end of the power supply module 110 and the input end of the voltage boosting module 130. The main chip 140 is configured to implement the main functions of the remote controller, such as remote control. The second control module 150 is configured to: in response to the key of the remote controller entity being triggered, turn on the path between the output end of the voltage boosting module 130 and the input end of the backlight module 160; and in response to the static state that the key of the remote controller entity is not triggered, block the path between the output end of the voltage boosting module 130 and the input end of the backlight module 160. The backlight module 160 is configured to light up the key area of the remote controller, facilitating the user to use.

[0038] According to the remote controller low-power supply control circuit 100 provided by the first aspect of the present application, at least the following beneficial effects are achieved: when the power supply module 110 is in a low-power state that is insufficient to support the normal operation of the main chip 140, the output power supply voltage of the power supply module 110 is input to the voltage boosting module 130 after passing through the first control module 120, the voltage boosting module 130 increases the voltage of the power supply voltage, and outputs the power supply voltage after the voltage is increased, on the one hand, the power supply voltage is output to the main chip 140 to make the main chip 140 operate normally, and on the other hand, the power supply voltage is output to the backlight module 160 after passing through the second control module 150 to make the backlight module 160 work normally; thereby prolonging the service life of the power supply module 110 and improving the user experience. That is to say, the remote controller low-power supply control circuit 100 provided by the present application can increase the power supply voltage in the low-power state, supply power to the main chip and the backlight module at the same time in the low-power state of the battery, ensure that the main chip 140 of the remote controller will not be reset actively and maintain normal operation in the low-power state, and the backlight module can also work normally, thereby prolonging the service life of the power supply battery and improving the user experience.

[0039] According to some embodiments of the present application, as shown in Figure 2 and Figure 3 The first control module 120 includes: a second resistor R2, a third resistor R3, an energy storage unit 121, and a first switch tube Q1. The emitter of the first switch tube Q1 is connected with the output end of the power supply module 110. The base of the first switch tube Q1 is connected with the first IO port 122 through the second resistor R2, and the first IO port 122 is configured to input an external low-level control signal. The collector of the first switch tube Q1 is connected with the first end of the energy storage unit 121 through the third resistor R3. The second end of the energy storage unit 121 is connected with the input end of the voltage boosting module 130.

[0040] According to some embodiments of the present application, as shown in Figure 2 and Figure 3As shown, the energy storage unit 121 comprises a first inductor L1 and a third capacitor C3; wherein a first end of the first inductor L1 is connected with one end of the third resistor R3, a second end of the first inductor L1 is connected with the input end of the voltage boosting module 130 as an output end; one end of the third capacitor C3 is connected between the third resistor R3 and the first end of the first inductor L1, and the other end of the third capacitor C3 is grounded.

[0041] Further explanation of the working principle of the first control module 120: just after the power supply module 110 (i.e. carbon zinc battery) is installed, the emitter voltage of the first switch tube Q1 is equal to the battery voltage VCC, the base of the first switch tube Q1 receives the external low-level control signal input through the first IO port 122, the base voltage of the first switch tube Q1 is low, the emitter and the collector of the first switch tube Q1 are turned on, the collector of the first switch tube Q1 outputs a high-level power supply voltage, and the output power supply voltage is input to the energy storage unit 121 after current limiting by the third resistor R3; the first inductor L1 and the third capacitor C3 in the energy storage unit 121 store energy, and the voltage of the power supply voltage is stabilized at 3.3V through the voltage boosting effect of the voltage boosting module 130, so that the main chip 140 of the remote controller can operate normally. In this way, through the low power supply control circuit 100 of the remote controller of the embodiment of the present application, the capacity of the power supply module 110 (i.e. carbon zinc battery) is indirectly increased, the service life is increased, and the remote controller can also operate normally under low power and low voltage.

[0042] It should be noted that when the remote controller low power supply control circuit 100 is enabled, in order to ensure that the main chip 140 will not reset when the key is operated, the remote controller also needs to be pre-configured with software, on the one hand to ensure that the remote controller will not reset or the liquid crystal display will not be normally driven; and on the other hand, the processing IO port of the main chip 140 is set to low level, so that the main chip 140 can also operate normally under low power.

[0043] Specifically, the software pre-configuration processing of the remote controller includes: first, setting the reset voltage to the lower limit value; then, closing the low voltage detection port; then, increasing the duty cycle of the infrared code sending and reducing the conduction time of the diode; then, completing the reset, exiting the low power mode, and starting to call the bottom function; and completing the software pre-configuration. Since the chip reset voltage has a minimum lower limit value, the chip reset voltage is pulled to the lower limit value through the software pre-configuration processing, and the low voltage detection function of the chip is deleted, which can maximize the prevention of chip reset.

[0044] According to some embodiments of the present application, the voltage boosting module 130 comprises a voltage boosting control chip U1 and a first filter unit, the input end of the voltage boosting control chip U1 is connected with the second end of the energy storage unit 121; and the first filter unit is connected between the output end of the voltage boosting control chip U1 and the ground.

[0045] According to some embodiments of the present application, the first filter unit comprises: a first filter capacitor C1 and a second filter capacitor C2 connected in parallel.

[0046] Specifically, the model of the boost control chip U1 is XT1861B332MR-G; the boost effect can be achieved.

[0047] When the power supply module 110 is insufficient in power, the boost module 130 receives a power supply voltage with a low voltage value, performs boost processing on the power supply voltage through the boost control chip U1, obtains a power supply voltage with a raised voltage value, and outputs a relatively stable boosted power supply voltage through the filtering action of the first filter capacitor C1 and the second filter capacitor C2, so that the main chip 140 can normally operate.

[0048] The present application embodiment simply uses a boost control chip U1, a suitable capacitor, and a boost module 130 as shown in Figure 2 , to achieve the effect that a low-power battery can also operate normally; and the control logic is simple and the control scheme has low cost.

[0049] It can be understood that the boost module 130 can be constructed based on the boost control chip U1, or the boost control chip U1 can be replaced with a BOOST circuit as shown in Figure 3 , which can also construct the boost module 130.

[0050] According to some embodiments of the present application, the boost module 130 comprises: a second inductor L2, a diode D1, and a second switch tube Q2; wherein the base of the second switch tube Q2 is connected with the second IO port 131; the collector of the second switch tube Q2 is connected with the second end of the energy storage unit 121 through the second inductor L2, and the collector of the second switch tube Q2 is also connected with the anode of the diode D1; the emitter of the second switch tube Q2 is grounded; and the cathode of the diode D1 is connected with the input end of the second control module 150.

[0051] According to some embodiments of the present application, the boost module 130 further comprises: a second filter unit, which is connected between the cathode of the diode D1 and the ground.

[0052] Specifically, the second filter unit comprises: an electrolytic capacitor C4 and a first resistor R1 connected in parallel, the positive electrode of the electrolytic capacitor C4 is connected with the cathode of the diode D1, and the negative electrode of the electrolytic capacitor C4 is grounded; and the first resistor R1 is connected between the cathode of the diode D1 and the ground.

[0053] Specifically, the second IO port 131 is used to input an external level signal.

[0054] The present application embodiment simply uses a diode, a triode, an inductor, and a suitable capacitor and resistor to construct a boost module 130 as shown inFigure 3 The boost module 130 shown achieves normal operation even with low battery levels; and the control logic is simple and the control scheme is low in cost.

[0055] To further explain, such as Figure 3 The working principle of the boost module 130 shown is as follows: Specifically, when the second switch Q2 is turned on, the current flowing through the second inductor L2 increases linearly. The self-inductance of the second inductor L2 hinders the current increase, and the second inductor L2 converts electrical energy into magnetic energy and stores it. The output voltage is approximately equal to the stored energy voltage. Diode D1 prevents the electrolytic capacitor C4 from discharging to ground. When the second switch Q2 is turned off, the inductor current begins to decrease slowly. The self-inductance of the second inductor L2 hinders the decrease in current. The voltage across the second inductor L2 is negative on the left and positive on the right, resulting in an output voltage greater than the input voltage; thus, boosting the voltage is achieved. Through the filtering effect of the parallel electrolytic capacitor C4 and the first resistor R1, a relatively stable boosted supply voltage is output, enabling the main chip 140 to operate normally.

[0056] According to some embodiments of this application, the second control module 150 includes: a fourth resistor R4 and a third switch Q3; the base of the third switch Q3 is connected to the third I / O port 151 through the fourth resistor R4, the emitter of the third switch Q3 is connected to the output terminal of the boost module 130, and the collector of the third switch Q3 is connected to the backlight module 160; the third I / O port 151 is used to: input a low-level control signal to the third switch Q3 when the button of the remote control is triggered; and input a high-level control signal to the third switch Q3 when the button of the remote control is not triggered.

[0057] It can be understood that, due to the large power consumption of the backlight module 160 of the remote controller, in the case that the power supply module 110 has low power, the main chip 140 will also be reset when the button is pressed, so the low power supply control circuit 100 of the remote controller provided in the embodiment of the application also needs to supply power to the backlight module 160. Further, the working principle of the second control module 150 is described. When the base of the third switch tube Q3 is low, the voltage at the emitter of the third switch tube Q3 is the boosted supply voltage (i.e. the supply voltage VDD input to the main chip 140), according to the PNP characteristic of the transistor, the emitter and the collector of the third switch tube Q3 are turned on, and the backlight diode is bright for 3s and then turned off. Specifically, when the button of the remote controller is triggered, the main chip 140 outputs a low level, and a low level control signal is input to the third switch tube Q3 through the third IO port 151, the third switch tube Q3 is turned on, the collector of the third switch tube Q3 outputs a high level, and the backlight diode is always bright. When the button of the remote controller is not triggered, the main chip 140 outputs a high level, and a high level control signal is input to the third switch tube Q3 through the third IO port 151, the third switch tube Q3 is turned off, the collector of the third switch tube Q3 outputs a low level, and the backlight diode is turned off.

[0058] According to some embodiments of the application, the first switch tube Q1, the second switch tube Q2 and the third switch tube Q3 are all PNP type transistors.

[0059] It should be noted that, if an NPN type transistor is selected as the first switch tube Q1, the voltage of the control pin will also be high after the working voltage of the rear circuit is raised, which will affect the working performance of the boost control chip U1, resulting in failure of the boost. However, if a PNP type transistor is selected as the first switch tube Q1, the input current of the rear boost control chip U1 is turned off, which ensures that the boost control chip U1 can normally perform the boost process.

[0060] In a second aspect, the embodiment of the application provides a remote controller comprising the low power supply control circuit 100 of the remote controller according to any one of the embodiments of the first aspect.

[0061] According to the remote controller provided by the second aspect of the present application, at least the following beneficial effects are achieved: when the power supply module 110 is in a low power state that is insufficient to support the normal operation of the main chip 140, the remote controller uses the remote controller low power supply control circuit 100, the power supply voltage output by the power supply module 110 is input to the voltage boosting module 130 after passing through the first control module 120, the voltage boosting module 130 increases the voltage of the power supply voltage, and outputs the power supply voltage after the voltage is increased, on the one hand, the power supply voltage is output to the main chip 140 to make the main chip 140 normally operate, and on the other hand, the power supply voltage is output to the backlight module 160 after passing through the second control module 150 to make the backlight module 160 normally work; thereby prolonging the service life of the power supply module 110 and improving the user experience. That is to say, the remote controller provided by the present application can increase the power supply voltage under the condition of low power supply by using the remote controller low power supply control circuit 100, and at the same time, the main chip and the backlight module are powered, which ensures that the main chip 140 of the remote controller will not be reset actively under the condition of low power supply, maintains normal operation, and the backlight module can also work normally, thereby prolonging the service life of the power supply battery and improving the user experience.

[0062] Those skilled in the art can understand that the circuit structure shown in the figure does not constitute a limitation on the embodiments of the present application, and can include more or fewer components than the figure, or combine certain components, or different component arrangements.

[0063] Those skilled in the art can understand that the system architecture and application scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of system architecture and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0064] The above is a specific description of the preferred embodiments of the present application, but the present application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the present application.

Claims

1. A remote controller low power supply control circuit, characterized by, The application relates to a power supply module, a first control module, a voltage boosting module, a main chip, a second control module and a backlight module. The first control module comprises a second resistor, a third resistor, an energy storage unit and a first switch tube; the emitter of the first switch tube is connected with the output end of the power supply module; the base of the first switch tube is connected with a first IO port through the second resistor, and the first IO port is used for inputting an external low-level control signal; the collector of the first switch tube is connected with the first end of the energy storage unit through the third resistor; and the second end of the energy storage unit is connected with the input end of the voltage boosting module. The energy storage unit comprises a first inductor and a third capacitor; the first end of the first inductor is connected with one end of the third resistor; the second end of the first inductor is connected with the input end of the voltage boosting module as an output end; and one end of the third capacitor is connected between the third resistor and the first end of the first inductor, and the other end of the third capacitor is grounded. The voltage boosting module comprises a voltage boosting control chip and a first filter unit; the input end of the voltage boosting control chip is connected with the second end of the energy storage unit; and the first filter unit is connected between the output end of the voltage boosting control chip and the ground. The first filter unit comprises a first filter capacitor and a second filter capacitor in parallel. The voltage boosting module comprises a second inductor, a diode and a second switch tube; the base of the second switch tube is connected with a second IO port; the collector of the second switch tube is connected with the second end of the energy storage unit through the second inductor, and the collector of the second switch tube is also connected with the anode of the diode; the emitter of the second switch tube is grounded; and the cathode of the diode is connected with the input end of the second control module. The voltage boosting module further comprises a second filter unit connected between the cathode of the diode and the ground.

2. The remote control low battery power supply control circuit of claim 1, wherein, The second control module comprises a fourth resistor and a third switch tube; the base of the third switch tube is connected with a third IO port through the fourth resistor; the emitter of the third switch tube is connected with the output end of the voltage boosting module; the collector of the third switch tube is connected with the backlight module; and the third IO port is used for inputting a low-level control signal to the third switch tube when the keys of the remote controller are triggered, and inputting a high-level control signal to the third switch tube when the keys of the remote controller are not triggered.

3. The remote control low battery power supply control circuit of claim 2, wherein, The first switch tube, the second switch tube and the third switch tube are all PNP type triodes. ​ ​ 4. The remote control low battery power supply control circuit of claim 2, wherein, ​ 5. The remote control low battery power supply control circuit of claim 4, wherein, ​ 6. The remote control low battery power supply control circuit of claim 2, wherein, ​ 7. The remote control low battery power supply control circuit of claim 6, wherein, ​ 8. The remote control low battery power supply control circuit of claim 6, wherein, ​ 9. The remote control low battery power supply control circuit of claim 8, wherein, ​ 10. A remote controller, characterized by comprising: A remote control low battery power supply control circuit as claimed in any one of claims 1 to 9.

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