A remote control circuit

Abstract

The utility model relates to a kind of remote controller control circuit with multiple key. The remote controller control circuit includes: trigger module, control module and key module;The trigger module is connected with the control module and key module respectively;The control module is connected with trigger module and key module respectively;The trigger module is used to trigger to make control module power on, the control module scans the signal of key module, sends key value;The key module is used to receive the key value of pressing, when key is pressed in shutdown state, PWR_ON potential is divided to close 0V by resistance on key, Q1 is turned on, MCU is powered on, immediately set POFF as high after preliminary scanning confirmation has key pressed to self-lock power supply.Then through the driving KOUT1-4 and KIN1-2 scanning, obtain single key value or combination key value, carry out key value sending.After sending, set POFF signal as low, after C2 short time delay, Q1 is turned off, complete once remote control operation.The utility model reduces the sleep power consumption of remote control circuit, prevents MCU from flying at the same time, improves battery durability and the stability of product.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, and in particular to a remote control circuit. Background Technology

[0002] Whether it's a traditional infrared remote control or a modern radio (such as 2.4GHz, Bluetooth) remote control, their basic circuit structure is largely the same, mainly including the following core components: battery, button matrix, main control chip circuit, carrier generator, and drive and transmission circuit. The drive and transmission circuit, including infrared remote controls and radio remote controls, converts the modulated weak electrical signal generated by the main control chip circuit into a sufficiently strong signal and transmits it. However, current infrared remote controls or other types of battery-powered devices consume a lot of power in standby mode, which can easily deplete the battery. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing infrared remote controls or other types of battery-powered devices, which consume a lot of standby power and are prone to battery depletion, and to propose a remote control control circuit.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A remote control circuit includes:

[0006] Trigger module, control module and button module;

[0007] The trigger module is connected to both the control module and the button module; the control module is connected to both the trigger module and the button module; the trigger module is used to power on the control module; the control module scans the signals of the button module and sends the button values; the button module is used to receive the pressed button values.

[0008] The trigger module includes a battery interface, field-effect transistors Q1, Q2, and Q3, resistors R1 and R2, and capacitor C1.

[0009] The battery interface is connected in parallel with MOSFET Q2 and resistor R1. The capacitor C1 and resistor R2 are connected in parallel with MOSFET Q1 and MOSFET Q31.

[0010] Preferably, the trigger module includes capacitor C2 and capacitor C3;

[0011] The capacitors C2 and C3 are connected in parallel with the field-effect transistor Q2, and the gate of the field-effect transistor Q1 is connected to the PWR_ON interface.

[0012] Preferably, the trigger module is connected to the button module via the PWR_ON interface, and the button module includes diodes D1, D2, D3, D4, D5, D6, D7, and D8.

[0013] Diodes D1 and D2 are connected to KOUT1, diodes D3 and D4 are connected to KOUT2, diodes D5 and D6 are connected to KOUT3, and diodes D7 and D8 are connected to KOUT4.

[0014] Preferably, the button module includes switch SW1, switch SW2, switch SW3, and switch SW4;

[0015] The switch SW1 is connected to diodes D1 and D2, the switch SW2 is connected to diodes D3 and D4, the switch SW3 is connected to diodes D5 and D6, and the switch SW4 is connected to diodes D7 and D8; the switches SW1, SW2, SW3, and SW4 are connected in series with the KIN1 interface.

[0016] Preferably, the button module includes switches SW5, SW6, SW7, and SW8; switch SW1 is connected to switch SW5, switch SW2 is connected to switch SW6, switch SW3 is connected to switch SW7, and switch SW4 is connected to switch SW8; switches SW5, SW6, SW7, and SW8 are connected in series with the KIN2 interface.

[0017] Preferably, the control module includes an XTALP interface and an XTALN interface, which are respectively connected to capacitor C5 and capacitor C6.

[0018] Preferably, the control module includes an RFP interface, which is connected to inductor L1 and capacitors C8 and C9.

[0019] Preferably, the control module includes an LED interface, which is connected in series with resistor R5 and an LED.

[0020] Compared with the prior art, in this embodiment of the utility model, the remote control control circuit includes: a trigger module, a control module, and a button module; the trigger module is connected to both the control module and the button module; the control module is connected to both the trigger module and the button module; the trigger module is used to trigger the control module to power on, and the control module scans the signal of the button module and sends the button value; the button module is used to receive the pressed button value, and when a button is pressed in the power-off state, PW RThe _ON signal is divided to near 0V by the resistor on the button, turning on Q1 and powering the MCU. The MCU then scans KOUT1-4 and KIN1-2 to obtain the button value, which is then sent. After transmission, the POFF signal is set low, and Q1 turns off after a short delay via C2, completing one remote control operation. This invention reduces the power consumption of the remote control circuit during sleep mode while preventing MCU malfunction, improving battery life and product stability. Attached Figure Description

[0021] The above and other objects, features, and advantages of exemplary embodiments of the present disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the present disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0022] Figure 1 This is a schematic diagram of a remote control circuit proposed in this utility model;

[0023] Figure 2 This is a circuit diagram of a trigger module proposed in this utility model;

[0024] Figure 3 This is a circuit diagram of a button module proposed in this utility model;

[0025] Figure 4 This is a circuit diagram of a control module proposed in this utility model;

[0026] Figure 5 This is a circuit diagram of a control module circuit proposed in this utility model. Detailed Implementation

[0027] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0028] The specific embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0029] Reference Figure 1 The diagram shows a schematic of a remote control circuit according to an embodiment of the present invention, including:

[0030] Trigger module, control module and button module;

[0031] The trigger module is connected to both the control module and the button module; the control module is connected to both the trigger module and the button module; the trigger module is used to power on the control module; the control module scans the signals of the button module and sends the button values; the button module is used to receive the pressed button values.

[0032] Reference Figure 2 The diagram shows a circuit diagram of a trigger module according to an embodiment of the present invention. The trigger module includes a battery interface, a field-effect transistor Q1, a field-effect transistor Q2, a field-effect transistor Q3, a resistor R1, a resistor R2, and a capacitor C1.

[0033] The battery interface is connected in parallel with MOSFET Q2 and resistor R1. The capacitor C1 and resistor R2 are connected in parallel with MOSFET Q1 and MOSFET Q31.

[0034] In a further embodiment of this utility model, the trigger module includes capacitors C2 and C3; capacitors C2 and C3 are connected in parallel with the field-effect transistor Q2, and the gate of the field-effect transistor Q1 is connected to the PWR_ON interface.

[0035] Reference Figure 3 The diagram shows a circuit diagram of a button module according to an embodiment of the present invention. The trigger module is connected to the button module through the PWR_ON interface. The button module includes diodes D1, D2, D3, D4, D5, D6, D7, and D8.

[0036] Diodes D1 and D2 are connected to KOUT1, diodes D3 and D4 are connected to KOUT2, diodes D5 and D6 are connected to KOUT3, and diodes D7 and D8 are connected to KOUT4.

[0037] In a specific example of this utility model embodiment, the button module includes switch SW1, switch SW2, switch SW3, and switch SW4;

[0038] The switch SW1 is connected to diodes D1 and D2, the switch SW2 is connected to diodes D3 and D4, the switch SW3 is connected to diodes D5 and D6, and the switch SW4 is connected to diodes D7 and D8; the switches SW1, SW2, SW3, and SW4 are connected in series with the KIN1 interface.

[0039] Further applied to this embodiment of the utility model, the button module includes switches SW5, SW6, SW7, and SW8; switch SW1 is connected to switch SW5, switch SW2 is connected to switch SW6, switch SW3 is connected to switch SW7, and switch SW4 is connected to switch SW8; switches SW5, SW6, SW7, and SW8 are connected in series with the KIN2 interface. The key point of this utility model is that diodes D1-D8 isolate the power-on Q1 from the KOUT1-4 functions of the buttons, so that pressing the button turns on the MCU power without affecting the MCU's scanning and detection of the keyboard.

[0040] It should be noted that this utility model embodiment can be applied to remote controls with 4 keys, 8 keys, 16 keys, etc., that is, the above-mentioned technical effects can be achieved by using different numbers of diodes. This utility model embodiment does not impose too many restrictions on the number of diodes.

[0041] Furthermore, the remote control circuit of this utility model embodiment is not limited to radio frequency remote control circuit, but can also be infrared remote control circuit. This utility model embodiment does not impose too many restrictions on this.

[0042] Reference Figure 4 The diagram shows a circuit diagram of a control module according to an embodiment of the present invention. The control module includes an XTALP interface and an XTALN interface, which are respectively connected to capacitor C5 and capacitor C6.

[0043] In this embodiment of the present invention, the control module includes an RFP interface, which is connected to inductor L1 and capacitors C8 and C9.

[0044] Reference Figure 5 The diagram shows a circuit diagram of a control module according to an embodiment of the present invention. The control module includes an LED interface, which is connected in series with a resistor R5 and an LED.

[0045] Specifically, in this embodiment of the invention, the control module, i.e., the MCU control chip, may include other interfaces, such as SWCLK, SWDIO, and AVDD interfaces. This embodiment of the invention does not impose excessive restrictions on the types of pin interfaces. In this embodiment of the invention, when a button is pressed in the power-off state, POW_ON is divided to near 0V through the resistor on the button, Q1 conducts, the MCU is powered on, and after a preliminary scan confirms that a button has been pressed, POFF is immediately set high to latch the power supply. Then, by driving KOUT1-4 and KIN1-2 to scan, the single button value or combination button is obtained, and the key value is sent. After the sending is completed, the POFF signal is set low, and after a short delay by C2, Q1 is turned off, completing one remote control operation. Ordinary remote control circuits do not have a Q1 circuit for power-on, nor do they have an isolation diode. This invention reduces the power consumption of the remote control circuit during sleep mode while preventing MCU malfunction, improving battery durability and product stability.

[0046] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "joined" should be interpreted broadly. For example, the term "joined" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not imply that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0048] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0049] While this specification has shown and described various embodiments of the present invention, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and essence of the present invention. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in the practice of the present invention. The appended claims are intended to define the scope of protection of the present invention and therefore cover the modular compositions, equivalents, or alternatives within the scope of these claims.

Claims

1. A remote control circuit, characterized in that, include: Trigger module, control module and button module; The trigger module is connected to both the control module and the button module; the control module is connected to both the trigger module and the button module; the trigger module is used to power on the control module; the control module scans the signals of the button module and sends the button values; the button module is used to receive the pressed button values.

2. The remote control circuit according to claim 1, characterized in that, The trigger module includes a battery interface, field-effect transistors Q1, Q2, and Q3, resistors R1 and R2, and capacitor C1. The battery interface is connected in parallel with MOSFET Q2 and resistor R1; the capacitor C1 and resistor R2 are connected in parallel with MOSFET Q1 and MOSFET Q31.

3. The remote control circuit according to claim 2, characterized in that, The triggering module includes capacitor C2 and capacitor C3; The capacitors C2 and C3 are connected in parallel with the field-effect transistor Q2, and the gate of the field-effect transistor Q1 is connected to the PWR_ON interface.

4. The remote control circuit according to claim 1, characterized in that, The trigger module is connected to the button module via the PWR_ON interface. The button module includes diodes D1, D2, D3, D4, D5, D6, D7, and D8. Diodes D1 and D2 are connected to KOUT1, diodes D3 and D4 are connected to KOUT2, diodes D5 and D6 are connected to KOUT3, and diodes D7 and D8 are connected to KOUT4.

5. The remote control circuit according to claim 1, characterized in that, The button module includes switch SW1, switch SW2, switch SW3, and switch SW4; The switch SW1 is connected to diodes D1 and D2, the switch SW2 is connected to diodes D3 and D4, the switch SW3 is connected to diodes D5 and D6, and the switch SW4 is connected to diodes D7 and D8; the switches SW1, SW2, SW3, and SW4 are connected in series with the KIN1 interface.

6. The remote control circuit according to claim 5, characterized in that, The button module includes switches SW5, SW6, SW7, and SW8; switch SW1 is connected to switch SW5, switch SW2 is connected to switch SW6, switch SW3 is connected to switch SW7, and switch SW4 is connected to switch SW8; switches SW5, SW6, SW7, and SW8 are connected in series with the KIN2 interface.

7. The remote control circuit according to claim 1, characterized in that, The control module includes an XTALP interface and an XTALN interface, which are respectively connected to capacitor C5 and capacitor C6.

8. The remote control circuit according to claim 7, characterized in that, The control module includes an RFP interface, which is connected to inductor L1 and capacitors C8 and C9.

9. The remote control circuit according to claim 7, characterized in that, The control module includes an LED interface, which is connected in series with resistor R5 and an LED.

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