Infrared emitting circuits, electronic devices, and vehicles

Abstract

This application relates to an infrared emitting circuit, electronic device, and vehicle. The infrared emitting circuit includes: an infrared emitting module comprising a first field-effect transistor (FET), a second FET, an infrared emitting diode, and a third capacitor; the first and second FETs are turned on upon receiving a transmission control signal, causing the infrared emitting diode to emit infrared light; the third capacitor is connected in parallel with the second FET and the infrared emitting diode; and a delay module comprising a first delay circuit corresponding to the first FET and a second delay circuit corresponding to the second FET, wherein the delay of the first delay circuit is greater than the delay of the second delay circuit, such that the first FET turns on before the second FET upon receiving the transmission control signal.

Description

Technical Field

[0001] This application relates to infrared emitting circuits, electronic devices, and vehicles. Background Technology

[0002] For vehicles, especially commercial vehicles, ships, airplanes, and trains, the cabin can accommodate a large number of passengers. Passengers need to remotely control the equipment in the cabin, such as display screens. For example, they can use electronic devices with infrared emitting circuits (such as remote controls) to emit infrared signals for remote control.

[0003] The inventors discovered that infrared remote controls require a large current to transmit signals instantaneously. However, due to the need for a thin and light remote control, the battery voltage used is relatively low, such as a 3.3V button battery with an operating current of 10mA to 20mA. The instantaneous current for an infrared remote control to transmit an infrared signal is 30mA to 50mA. Therefore, the battery cannot provide this instantaneous current, resulting in a synchronous drop in the supply voltage. This not only affects the sensitivity of the remote control but also reduces the battery's lifespan.

[0004] Therefore, there is a need in the art for an infrared emitting circuit, electronic device, or vehicle to overcome at least one of the aforementioned technical problems. Utility Model Content

[0005] The technical problem to be solved by this application is to address the issue of insufficient power supply caused by the large current required for infrared emitting circuits to transmit data.

[0006] According to a first aspect of this application, an infrared emitting circuit receives an input voltage provided by a power supply. The infrared emitting circuit includes: an infrared emitting module, comprising a first field-effect transistor (FET), a second FET, an infrared emitting diode, and a third capacitor; the first and second FETs are turned on upon receiving a transmission control signal, causing the infrared emitting diode to emit infrared light; the third capacitor is connected in parallel with the second FET and the infrared emitting diode; a delay module, comprising a first delay circuit corresponding to the first FET and a second delay circuit corresponding to the second FET; the delay of the first delay circuit is greater than the delay of the second delay circuit, such that the first FET and the second FET are turned on in the order that the first FET turns on before the second FET; and a voltage boosting module, comprising a second resistor, a fourth resistor, and a second capacitor electrically connected to the first FET; the voltage division of the second resistor provides the voltage level of the first FET when it is turned on; when the first FET is turned off, the voltage division of the fourth resistor provides the charging voltage of the second capacitor, and the capacitor discharges when the first FET is turned on, thereby boosting the power supply voltage of the infrared emitting circuit.

[0007] The infrared emitting circuit described above utilizes the discharge process of the charge pump to offset the high current demand during infrared emission, thereby ensuring the infrared emission sensitivity of the electronic device. Specifically, the energy storage of the third capacitor and the high level during the discharge of the second capacitor offset the voltage drop during infrared emission, thus ensuring infrared emission sensitivity. Furthermore, controlling the time difference between the discharge of the charge pump and the emission of infrared light by the infrared emitting diode ensures that the supply voltage is neither too high nor too low. Excessive voltage may cause backflow into the battery, leading to battery damage, while insufficient voltage reduces battery utilization.

[0008] In one or more embodiments of the infrared emitting circuit, the first delay circuit and the second delay circuit are both RC delay circuits, the first delay circuit includes a third resistor and a fifth capacitor, and the second delay circuit includes a sixth resistor and a fourth capacitor.

[0009] In one or more embodiments of the infrared emitting circuit, a first capacitor connected in parallel with the power supply, and a first resistor and a fifth resistor connected in series with the second field-effect transistor; the first and second field-effect transistors are turned on when they receive a transmission control signal; the infrared emitting circuit provides a first loop and a second loop, wherein the current direction of the first loop is output from the power supply, passing through the first resistor, the fifth resistor, the infrared emitting diode, and the second field-effect transistor; and the current direction of the second loop is output from the power supply, passing through the first resistor, the fourth resistor, the first field-effect transistor, and the second resistor.

[0010] In one or more embodiments of the infrared emitting circuit, the third capacitor is connected in series with the first resistor and the fifth resistor.

[0011] In one or more embodiments of the infrared emitting circuit, the capacitance of the third capacitor is 40μF to 60μF.

[0012] In one or more embodiments of the infrared emitting circuit, the input voltage provided by the power supply is no greater than 3.6V.

[0013] In one or more embodiments of the infrared emitting circuit, the infrared emitting circuit does not include a voltage regulator.

[0014] An electronic device according to a second aspect of this application includes a power supply and an infrared emitting circuit as described in the first aspect, wherein the power supply provides an input voltage to the infrared emitting circuit, and the electronic device is capable of emitting infrared remote control signals to remotely control a controlled object.

[0015] In one or more embodiments of the electronic device, the thickness of the electronic device is 8 mm to 16 mm, and the power source includes a button battery.

[0016] The electronic devices described above, by employing the infrared emitting circuit described in the first aspect, achieve reliable transmission of infrared control signals at a relatively low cost.

[0017] A means of transport according to a third aspect of this application includes an electronic device as described in the second aspect and the controlled object, the controlled object including the display screen of the means of transport.

[0018] The vehicles described above allow occupants to easily control equipment within the vehicle, such as the vehicle's display screen, via electronic devices equipped with the infrared emitting circuit. Attached Figure Description

[0019] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a schematic block diagram of a vehicle according to an embodiment of this application.

[0021] Figure 2 This is a circuit diagram of an infrared emitting circuit and a power supply according to an embodiment of this application.

[0022] Figure 3 This is a voltage curve diagram of V1 and V2 of an infrared emitting circuit according to an embodiment of this application.

[0023] Figure 4 This is a circuit diagram of the first comparative scheme.

[0024] Figure 5 This is a voltage curve of V0 for the infrared emitting circuit of an embodiment of this application and a first comparative scheme.

[0025] Figure 6 This is a circuit diagram of the second comparative scheme.

[0026] Figure 7 This is a circuit diagram of the third comparative scheme.

[0027] Figure label:

[0028] 100-Infrared Emitting Circuit

[0029] 1-Power Supply

[0030] 11-First capacitor

[0031] 12-First Resistor

[0032] 13-Fifth Resistor

[0033] 14,14b - Third capacitor

[0034] 15-First Inductor

[0035] 2-Infrared Emitting Module

[0036] 21-First Field-Effect Transistor

[0037] 22-Second Field-Effect Transistor

[0038] 23-Infrared emitting diode

[0039] 24-Transmit control signal

[0040] 3-Delay Module

[0041] 31-First Delay Circuit

[0042] 311-Third Resistor

[0043] 312-Fifth Capacitor

[0044] 32-Second Delay Circuit

[0045] 321-Sixth Resistor

[0046] 322-Fourth Capacitor

[0047] 4-Voltage Boost Module

[0048] 41-Second Resistor

[0049] 42-Fourth Resistor

[0050] 43-Second capacitor

[0051] 5-Voltage regulator. Detailed Implementation

[0052] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of this application in any way.

[0053] The following description is provided to enable those skilled in the art to implement and use this application and incorporate it into specific application contexts. Various variations and uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Therefore, this application is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

[0054] In the following detailed description, numerous specific details are set forth to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that practice of this application is not necessarily limited to these specific details. In other words, well-known structures and devices are shown in block diagram form without detailed representation to avoid obscuring this application.

[0055] Readers should note all documents and references submitted concurrently with this specification and open to public inspection, the contents of which are incorporated herein by reference. Unless otherwise expressly stated, all features disclosed in this specification (including any appended claims, abstracts, and drawings) may be replaced by alternative features for the same, equivalent, or similar purposes. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features.

[0056] Note that, where used, the markings left, right, front, back, top, bottom, front, back, clockwise, and counterclockwise are merely for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or orientation between different parts of an object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] Note that, in practice, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments. The combination of the content following "further," "preferably," "even further," or "more preferably" with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment can form yet another embodiment.

[0058] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of this application in any way.

[0059] like Figure 1 As shown, the vehicle 1000, such as a vehicle, may include an electronic device 200 and a controlled object 300. The controlled object 300 may include a display screen of the vehicle. Passengers can hold a remote control, which is the electronic device 200, and control the display screen of the controlled object 300 by emitting infrared control signals through the remote control. The electronic device 200 includes a power supply 1 and an infrared emitting circuit 100. The power supply 1 provides the input voltage V0 to the infrared emitting circuit 100. The electronic device 200 is capable of emitting infrared remote control signals to remotely control the controlled object 300. The infrared emitting circuit 100 of the electronic device 200 in the embodiment will be described in detail later.

[0060] It is understood that although the infrared emitting circuit and electronic equipment disclosed in the embodiments of this application are used in vehicles such as commercial vehicles, this is not a limitation. For example, they can also be applied to other transportation applications, such as trains, ships, and airplanes. As long as it is a means of transportation, the infrared emitting circuit and electronic equipment disclosed in the embodiments of this application can be used to achieve the effect of facilitating the control of the display screen by passengers.

[0061] As described above, because infrared remote controls require a large current to transmit signals instantaneously, and due to the need for a thin and lightweight remote control (for example, in some embodiments, the thickness of the electronic device 200 is 8mm to 16mm, such as 10mm), to meet the requirements of thinness, a button battery is used as the power source 1, with a voltage not exceeding 3.6V, for example, a 3V button battery, and an operating current of 10mA to 20mA. However, the instantaneous current for the infrared remote control to transmit infrared signals is 30mA to 50mA. Therefore, the battery cannot provide this instantaneous current, resulting in a synchronous voltage drop, which not only affects the sensitivity of the remote control but also reduces the battery's lifespan. It can be understood that the meaning of "button battery" in this application is similar to its common meaning in the art, that is, a battery with a shape resembling a small button, generally with a large diameter and a thin thickness. Button batteries can be divided into rechargeable and non-rechargeable types. Common rechargeable button batteries include 3.6V rechargeable lithium-ion button batteries (LIR series) and 3V rechargeable lithium-ion button batteries (ML or VL series). Common non-rechargeable button batteries include 3V lithium manganese button batteries (CR series) and 1.5V alkaline zinc manganese button batteries (LR and SR series).

[0062] refer to Figure 2 As shown, the infrared emitting circuit 100 receives the input voltage V0 provided by the power supply 1. The infrared emitting circuit 100 includes: an infrared emitting module 2, a delay module 3, and a voltage boosting module 4. It can be understood that the "modules" of the infrared emitting module 2, delay module 3, and voltage boosting module 4 described here refer to modules that have at least hardware, and not purely software modules that do not have hardware and only include software.

[0063] The infrared emitting module 2 includes a first field-effect transistor 21, a second field-effect transistor 22, and an infrared emitting diode 23. The first field-effect transistor 21 and the second field-effect transistor 22 can receive the emission control signal 24 and be turned on, so that the infrared emitting diode 23 emits infrared light. The third capacitor 14 is connected in parallel with the second field-effect transistor 22 and the infrared emitting diode 23.

[0064] The first field-effect transistor 21 and the second field-effect transistor 22 can generally be MOS transistors (i.e., metal-oxide-semiconductor field-effect transistors), but this is not a limitation.

[0065] The infrared emitting module 2 is powered by the power supply 1. The infrared emitting diode 23, i.e., LED, serves as the light source for emitting infrared light. The communication protocol followed by the transmission control signal 24 can be, for example, the commonly used NEC infrared transmission protocol, but is not limited to this, and can also be other infrared transmission protocols.

[0066] The delay module 3 includes a first delay circuit 31 corresponding to the first field-effect transistor 21 and a second delay circuit 32 corresponding to the second field-effect transistor 22. The delay of the first delay circuit 31 is greater than the delay of the second delay circuit 32, so that the turn-on sequence of the first field-effect transistor 21 and the second field-effect transistor 22 receiving the transmit control signal 24 is that the first field-effect transistor 21 turns on before the second field-effect transistor 22. The beneficial effect of setting the delay module 3 is that when the first field-effect transistor 21 is turned on, the voltage at point V2 will be raised, and when transistor T2 is turned on, the voltage at point V2 will be pulled down. Therefore, when the remote control is working, it is best for T1 to turn on slightly earlier than T2.

[0067] Continue to refer to Figure 2 As shown, the specific form of the delay circuit can be a simple RC delay circuit, i.e., both the first delay circuit 31 and the second delay circuit 32 are RC delay circuits. The first delay circuit 31 includes a third resistor 311 and a fifth capacitor 312, and the second delay circuit 32 includes a sixth resistor 321 and a fourth capacitor 322. RC delay originates from the charging and discharging effect generated by parasitic resistance and capacitance when a signal passes through a conductor. The delay time is proportional to the product of the resistance and capacitance. Therefore, to achieve a delay greater than that of the second delay circuit 32 in the first delay circuit 31, the resistance and capacitance of the third resistor 311, the fifth capacitor 312, the sixth resistor 321, and the fourth capacitor 322 can be adjusted, which will not be elaborated here. It can be understood that other common delay circuit forms can also be used, but the RC circuit is simple in structure and has a lower cost.

[0068] The voltage boosting module 4 includes a second resistor 41, a fourth resistor 42, and a second capacitor 43 electrically connected to the first field-effect transistor 21. The voltage division of the second resistor 41 provides the voltage level V1 of the first field-effect transistor 21 when it is turned on. When the first field-effect transistor 21 is turned off, the voltage division of the fourth resistor 42 provides the charging voltage of the second capacitor 43. When the first field-effect transistor 21 is turned on, the capacitor discharges, thus boosting the power supply voltage V2 of the infrared emitting circuit 100.

[0069] Specifically, the voltage boost module 4 works as follows: when the transmit control signal 24 is low, the first field-effect transistor 21 and the second field-effect transistor 22 are turned off, charging the second capacitor 43, at which time the voltage value of V1 is 0V; when the transmit control signal 24 is high, the voltage level of V1 satisfies the following formula:

[0070] V1=(R2 / (R2+R4+R DS-ON ))*V0;

[0071] R2 is the resistance value of the second resistor 41, R4 is the resistance value of the fourth resistor 42, R DS-ON This refers to the internal resistance of the first field-effect transistor 21 when it is turned on, which is in the mΩ range. Compared to the kΩ of the second resistor 41 and the fourth resistor 42, R DS-ON It can be ignored.

[0072] The theoretical voltage of V2 is V0 + V1. However, during the charging and discharging of the second capacitor 43, infrared light is emitted, so the actual value of V2 will be smaller than the theoretical value. Figure 3 As shown, IR_CTL is the high or low level of the transmit control signal 24; V0 = 2.5V, V1 ≈ 1V, and V2 ≈ 3.5V during discharge.

[0073] The beneficial effect of setting the delay module 3 is that when the first field-effect transistor 21 is turned on, the voltage at point V2 will be raised, and when the second field-effect transistor 22 is turned on, the voltage at point V2 will be pulled down. Therefore, when the infrared emitting circuit 100 is working, the first field-effect transistor 21 is turned on earlier than the second field-effect transistor 22. It can be understood that the difference in delay between the two is small. It is only necessary that the first field-effect transistor 21 is turned on slightly earlier than the second field-effect transistor 22.

[0074] In some embodiments, the infrared emitting circuit 100 may further include a first capacitor 11 connected in parallel with the power supply 1, and a first resistor 12 and a fifth resistor 13 connected in series with the second field-effect transistor 22; the first field-effect transistor 21 and the second field-effect transistor 22 are turned on when they receive the transmission control signal 24; the infrared emitting circuit 100 provides a first loop and a second loop, the current direction of the first loop being output from the power supply 1, passing through the first resistor 12, the fifth resistor 13, the infrared emitting diode 23, and the second field-effect transistor 22; the current direction of the second loop being output from the power supply 1, passing through the first resistor 12, the fourth resistor 42, the first field-effect transistor 21, and the second resistor 41. In some embodiments, the third capacitor 14 is connected in series with the first resistor 12 and the fifth resistor 13. The beneficial effect of using the first resistor 12 and the fifth resistor 13 is that they play a current-limiting role, defining the infrared transmission power, making the power of the emitting circuit easy to control.

[0075] The beneficial effect of the above embodiments is that the high current demand during infrared emission is offset by the discharge process of the charge pump, thereby ensuring the infrared emission sensitivity of the electronic device. Specifically, the energy storage of the third capacitor 14 and the high level during the discharge of the second capacitor 43 offset the voltage drop during infrared emission, thus ensuring the remote control's emission sensitivity. Furthermore, controlling the time difference between the discharge of the charge pump and the emission of infrared light by the infrared emitting diode 23 ensures that the power supply voltage is neither too high nor too low. Too high a voltage may cause backflow into the battery, leading to battery damage, while too low a voltage reduces battery utilization.

[0076] The following is passed Figure 2 The illustrated embodiment, and Figure 4 , Figure 6 , Figure 7 Compared with the first, second, and third comparative schemes shown, the beneficial effects of the embodiments are explained in more detail.

[0077] Based on the above, for reference Figure 4 As shown, the infrared emitting circuit of the first comparative scheme includes a first capacitor 11, a first resistor 12, a fifth resistor 13, a third capacitor 14, a second field-effect transistor 22, an infrared emitting diode 23 (i.e., LED), and a corresponding emission control signal 24 for controlling the second field-effect transistor 22, as well as a corresponding delay circuit including a second delay circuit 32, a sixth resistor 321, and a fourth capacitor 322.

[0078] for Figure 4 In the first comparative scheme shown, when infrared transmission is possible, the power consumption circuit is: Power supply 1 -> First resistor 12 -> Fifth resistor 13 -> Infrared emitting diode 23 -> Second field-effect transistor 22. The maximum pulse current of the 3V button battery used in the remote control is generally <20mA, while the current at the moment of transmission in a common remote control can reach 50mA or even higher. Therefore, at the moment of infrared transmission, the voltage of the entire circuit V0, V2, and V3 will be pulled down, resulting in a lower voltage, a smaller infrared transmission current, and a lower transmission sensitivity. (See reference...) Figure 5 As shown, the first channel represents the high or low level of the transmission control signal 24, the second channel represents the curve of the input voltage V0 of the first comparison scheme. It can be found that when performing infrared transmission, the maximum drop of V0 is 0.9V, while the third channel represents the curve of the input voltage V0 of the embodiment. It can be found that when performing infrared transmission, the maximum drop of V0 is 0.25V. Compared with the first comparison scheme, the embodiment has a significant improvement effect.

[0079] for Figure 6The second comparative scheme shown, compared to the first comparative scheme, incorporates a voltage regulator 5 and a corresponding fifth capacitor 312 for voltage regulation. The voltage regulator 5 has a similar meaning to its conventional counterpart in the art; it can also be referred to as a voltage regulator chip or a voltage regulator circuit. Regardless of changes in input voltage or load conditions, it generates and maintains a fixed output voltage. Voltage regulators include linear regulators and switching regulators. Both can regulate system voltage; linear regulators have lower efficiency, while switching regulators have higher efficiency. Figure 6 The second comparative solution shown also solves the problem in the first comparative solution where the battery cannot provide a large instantaneous current (30mA to 50mA), resulting in a synchronous drop in the supply voltage, which not only affects the remote control sensitivity but also reduces the battery life. However, regardless of whether a switching or linear regulator is used, the cost is relatively high. The infrared emitting circuit 100 in this embodiment, through the simple configuration of resistors and capacitors, eliminates the need for a voltage regulator 5, thus reducing the cost.

[0080] for Figure 7 The third comparative scheme, as shown, addresses the issue in the first scheme where the battery cannot provide a large instantaneous current (30mA to 50mA), leading to a synchronous voltage drop. This is achieved through LC energy storage, specifically by adding a first inductor 15 and a third capacitor 14b. This solves the problem of the first scheme where the battery cannot provide a large instantaneous current, causing voltage drops that affect remote control sensitivity and reduce battery life. However, in the third comparative scheme, the capacity of the third capacitor 14b is significantly larger than that of the third capacitor 14. While the third capacitor 14 in the embodiments and the first comparative scheme only requires a capacity of 40μF to 60μF, the third capacitor 14b in the third comparative scheme needs to reach approximately 1000μF. Therefore, the cost of the third comparative scheme is also higher than that of the embodiments.

[0081] In summary, the beneficial effects of the infrared emitting circuit, electronic device, and vehicle described in the above embodiments include, but are not limited to, offsetting the large current demand during infrared emission by utilizing the discharge process of the charge pump, thereby ensuring the infrared emission sensitivity of the electronic device. Specifically, the energy storage of the third capacitor 14 and the high level during the discharge of the second capacitor 43 offset the voltage drop during infrared emission, thereby ensuring the remote control's emission sensitivity. Furthermore, controlling the time difference between the discharge of the charge pump and the emission of infrared light by the infrared emitting diode 23 ensures that the power supply voltage is not too high or too low. Too high a voltage may cause backflow into the battery, leading to battery damage, while too low a voltage reduces battery utilization. The infrared emitting circuit of the embodiments achieves reliable infrared control signal transmission from electronic devices at a lower cost. Additionally, it makes it easy for occupants to control devices in the vehicle, such as the vehicle's display screen, using the electronic device equipped with this infrared emitting circuit.

[0082] The preceding description is provided to enable any person skilled in the art to practice the various aspects described herein. However, it should be understood that the scope of protection of this application should be determined by the appended claims and should not be limited to the specific structures and components of the embodiments described above. Various changes and modifications can be made to the embodiments by those skilled in the art within the spirit and scope of this application, and these changes and modifications also fall within the scope of protection of this application.

Claims

1. An infrared emission circuit (100) receiving an input voltage (Vo) provided by a power supply (1), characterized in that, The infrared emitting circuit (100) includes: The infrared emitting module (2) includes a first field-effect transistor (21), a second field-effect transistor (22), an infrared emitting diode (23), and a third capacitor (14). The first field-effect transistor (21) and the second field-effect transistor (22) can receive the emission control signal (24) and be turned on, so that the infrared emitting diode (23) emits infrared light. The third capacitor (14) is connected in parallel with the second field-effect transistor (22) and the infrared emitting diode (23). The delay module (3) includes a first delay circuit (31) corresponding to the first field-effect transistor (21) and a second delay circuit (32) corresponding to the second field-effect transistor (22). The delay of the first delay circuit (31) is greater than the delay of the second delay circuit (32), so that the first field-effect transistor (21) and the second field-effect transistor (22) receive the transmission control signal (24) in the following order: the first field-effect transistor (21) is turned on earlier than the second field-effect transistor (22). The voltage boosting module (4) includes a second resistor (41), a fourth resistor (42), and a second capacitor (43) electrically connected to the first field-effect transistor (21). The voltage division of the second resistor (41) provides the voltage level (V1) of the first field-effect transistor (21) when it is turned on. When the first field-effect transistor (21) is turned off, the voltage division of the fourth resistor (42) provides the charging voltage of the second capacitor (43). When the first field-effect transistor (21) is turned on, the capacitor discharges, thereby boosting the supply voltage (V2) of the infrared emitting circuit (100).

2. The infrared transmission circuit (100) of claim 1, characterized in that, The first delay circuit (31) and the second delay circuit (32) are both RC delay circuits. The first delay circuit (31) includes a third resistor (311) and a fifth capacitor (312), and the second delay circuit (32) includes a sixth resistor (321) and a fourth capacitor (322).

3. The infrared transmission circuit (100) of claim 2, characterized in that, It also includes a first capacitor (11) connected in parallel with the power supply (1), and a first resistor (12) and a fifth resistor (13) connected in series with the second field-effect transistor (22); when the first field-effect transistor (21) and the second field-effect transistor (22) can receive the transmission control signal (24) and are turned on; the infrared emitting circuit (100) provides a first circuit and a second circuit, the current direction of the first circuit is output from the power supply (1), through the first resistor (12), the fifth resistor (13), the infrared emitting diode (23), and the second field-effect transistor (22); the current direction of the second circuit is output from the power supply (1), through the first resistor (12), the fourth resistor (42), the first field-effect transistor (21), and the second resistor (41).

4. The infrared emitting circuit (100) as described in claim 3, characterized in that, The third capacitor (14) is connected in series with the first resistor (12) and the fifth resistor (13).

5. The infrared emitting circuit (100) as described in claim 4, characterized in that, The capacitance of the third capacitor (14) is 40μF to 60μF.

6. The infrared transmission circuit (100) of claim 1, characterized in that, The input voltage (V0) provided by the power supply (1) is no greater than 3.6V.

7. The infrared transmission circuit (100) of claim 1, characterized in that, The infrared emitting circuit (100) does not include a voltage regulator (5).

8. An electronic device (200), characterized by Includes a power supply (1) and an infrared emitting circuit (100) as described in any one of claims 1-7, wherein the power supply (1) provides an input voltage (V0) to the infrared emitting circuit (100), and the electronic device (200) is capable of emitting infrared remote control signals to remotely control a controlled object (300).

9. The electronic device (200) of claim 8, wherein, The thickness of the electronic device (200) is 8 mm to 16 mm, and the power supply (1) includes a button battery.

10. A vehicle (1000), characterized in that Includes the electronic device (200) as described in claim 8 or 9 and the controlled object (300), the controlled object (300) including a display screen of a vehicle.

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