Infrared signal transmitting circuit and electronic equipment

Abstract

The utility model provides an infrared signal transmitting circuit and electronic equipment, and the infrared signal transmitting circuit comprises a main control unit, an inverter, an AND gate circuit, a drive control circuit, and an infrared light-emitting diode circuit. A carrier signal transmitting end of the main control unit is electrically connected with a first end of the AND gate circuit, a serial port signal transmitting end of the main control unit is electrically connected with a first end of the inverter, and a second end of the inverter is electrically connected with a second end of the AND gate circuit. The drive control circuit is electrically connected with the third end of the AND gate circuit and the infrared light emitting diode circuit. Through the implementation of the utility model, the serial port signal can be converted into the infrared signal which can be identified by the infrared receiving sensor, so that the infrared signal is less interfered in the transmission process, the communication reliability is improved, the frequency flexibility of the transmitted infrared signal is larger, and more different communication requirements can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless transmission, in particular to an infrared signal transmitting circuit and electronic equipment. Background Art

[0002] In surgical table control technology, wireless control is often achieved using a remote control, which typically utilizes infrared communication. However, in related technologies, infrared communication for surgical tables often utilizes pulse-width modulation (PWM) transmission. However, infrared signals transmitted using PWM technology typically require complex hardware and software support, which can increase implementation costs and complexity. Furthermore, infrared signals transmitted using PWM technology can be subject to interference during transmission, resulting in reduced signal quality and impacting communication stability and reliability. Furthermore, because PWM transmission is achieved by modulating pulse width, it may be subject to frequency limitations in some cases, failing to meet communication requirements. Utility Model Content

[0003] The utility model provides an infrared signal transmitting circuit and electronic equipment, aiming to solve the problems of poor transmission stability and large frequency limitation in the related art when using PWM technology to transmit infrared communication.

[0004] In order to solve the above technical problems, the first aspect of the present invention provides an infrared signal transmitting circuit, including: a main control unit, an inverter, an AND gate circuit, a drive control circuit and an infrared light-emitting diode circuit; the carrier signal sending end of the main control unit is electrically connected to the first end of the AND gate circuit, the serial port signal sending end of the main control unit is electrically connected to the first end of the inverter, the second end of the inverter is electrically connected to the second end of the AND gate circuit, and the drive control circuit is electrically connected to the third end of the AND gate circuit and the infrared light-emitting diode circuit respectively.

[0005] Furthermore, the inverter includes a first MOS transistor, a gate of the first MOS transistor is electrically connected to the serial port signal sending end of the main control unit, a drain of the first MOS transistor is electrically connected to the second end of the AND gate circuit; and a source of the first MOS transistor is grounded.

[0006] Furthermore, the drive control circuit includes a second MOS transistor, the gate of the second MOS transistor is electrically connected to the third end of the AND gate circuit, the drain of the second MOS transistor is electrically connected to the infrared light emitting diode circuit, and the source of the second MOS transistor is grounded.

[0007] Furthermore, the infrared light emitting diode circuit includes at least one infrared light emitting diode sub-circuit, one end of the infrared light emitting diode sub-circuit is electrically connected to the power supply, and the other end is electrically connected to the drive control circuit.

[0008] Furthermore, the main control unit includes a microcontroller unit.

[0009] A third aspect of the present invention provides an electronic device, comprising the infrared signal transmitting circuit as described in the first aspect of the present invention.

[0010] From the above description, it can be seen that the utility model inverts the serial port signal output by the main control unit through an inverter, then loads the inverted serial port signal onto the carrier signal through an AND gate circuit, and finally drives the infrared light-emitting diode circuit to emit an infrared signal through a driving control circuit. In this way, the serial port signal can be converted into an infrared signal that can be recognized by an infrared receiving sensor, so that the infrared signal is less interfered with during the transmission process, thereby improving the reliability of communication. The frequency flexibility of the infrared signal generated by the serial port signal drive is relatively large, which can meet more different communication needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural diagram of an infrared signal transmitting circuit according to an embodiment of the present utility model;

[0012] Figure 2 This is a circuit principle diagram of an infrared signal transmitting circuit according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0014] In the related art, there is a problem that the software control of infrared communication using PWM is relatively complex. Therefore, an embodiment of the present utility model provides an infrared signal transmitting circuit.

[0015] like Figure 1The figure shows a structural schematic diagram of an infrared signal transmitting circuit provided by this embodiment, which includes: a main control unit 100, an inverter 200, an AND gate circuit 300, a drive control circuit 400 and an infrared light-emitting diode circuit 500; the carrier signal transmitting end of the main control unit 100 is electrically connected to the first end of the AND gate circuit 300, the serial port signal transmitting end of the main control unit 100 is electrically connected to the first end of the inverter 200, the second end of the inverter 200 is electrically connected to the second end of the AND gate circuit 300, and the drive control circuit 400 is electrically connected to the third end of the AND gate circuit 300 and the infrared light-emitting diode circuit 500, respectively.

[0016] Specifically, in this embodiment, the serial port signal output by the main control unit 100 is inverted via an inverter 200, and then the inverted serial port signal is added to the carrier signal via an AND gate circuit 300. Finally, the drive control circuit 400 drives the infrared light-emitting diode circuit 500 to transmit an infrared signal. This converts the serial port signal into an infrared signal that can be recognized by an infrared receiving sensor, allowing infrared communication to be directly converted into serial port communication, facilitating software control and processing. In this embodiment, the main control unit 100 can be a controller capable of transmitting carrier signals and serial port signals, such as a microcontroller unit (MCU) or a field-programmable gate array (FPGA).

[0017] like Figure 2 The circuit diagram of an infrared signal transmitting circuit provided by this embodiment is shown in FIG. Figure 2 The inverter 200 includes a first MOS transistor Q17, a gate of the first MOS transistor Q17 is electrically connected to the serial port signal sending end of the main control unit 100, a drain of the first MOS transistor Q17 is electrically connected to the second end of the AND gate circuit 300; and a source of the first MOS transistor Q17 is grounded.

[0018] Specifically, in this embodiment, the inverter 200 can be used to implement an inversion function, that is, to change the logic 0 of the input serial port signal to logic 1, and to change the logic 1 to logic 0. The inverter 200 in this embodiment uses an NMOS tube. When the serial port signal received from the serial port signal transmitting terminal TTL3V3_IRC_TX of the main control unit 100, such as the MCU, is low, the gate voltage of the NMOS tube is low, and the output terminal remains high. When the serial port signal is high, the NMOS tube is turned on and the output terminal is low. The inverted serial port signal can be used to modulate the carrier signal. When the input terminal of the AND gate circuit U9 (300) is connected to the carrier signal sent from the carrier signal transmitting terminal TTL3V3_IRC_38KHz of the MCU and the inverted serial port signal, when the serial port signal is logic 1 (i.e., high), the carrier signal will be allowed to pass. When the serial port signal is logic 0 (i.e., low), the carrier signal will be blocked, thereby loading the serial port signal onto the carrier signal through the modulation action of the AND gate circuit U9.

[0019] Further, see Figure 2 The infrared signal transmitting circuit further includes a first resistor R141 and a second resistor R140. The first resistor R141 is electrically connected between the main control unit 100 and the first MOS transistor Q17. One end of the second resistor R140 is electrically connected to the power supply, and the other end of the second resistor R140 is electrically connected to the gate of the first MOS transistor Q17.

[0020] Further, see Figure 2 The infrared signal transmitting circuit also includes a third resistor R138, a fourth resistor R139, a fifth resistor R143, a sixth resistor R142 and a first capacitor C77; the third resistor R138 is electrically connected between the main control unit 100 and the AND gate circuit U9, the fourth resistor R139 is electrically connected between the inverter 200 and the AND gate circuit U9, one end of the fifth resistor R143 is electrically connected to the first end of the AND gate circuit U9, one end of the sixth resistor R142 is electrically connected to the second end of the AND gate circuit U9, the other ends of the fifth resistor R143 and the sixth resistor R142, the fourth end of the AND gate circuit U9, and one end of the first capacitor C77 are all electrically connected to the power supply, and the other end of the first capacitor C77 is grounded.

[0021] Specifically, in this embodiment, to ensure the stability of the entire circuit, resistor designs are added to the gate of the inverter 200. Among them, the first resistor R141 is a current-limiting resistor, and the second resistor R140 provides a customized voltage level for the inverter 200 to prevent the inverter 200 from floating in an uncertain state, thereby providing circuit stability and reliability. Adding a current-limiting resistor and a pull-up resistor to each of the two input terminals of the AND gate circuit U9 ensures that the input terminals can maintain a high-level state when there is no external input signal. This prevents the input terminals from being affected by external interference due to being suspended, ensuring signal stability and reliability. In addition, the pull-up resistor can also increase the voltage level, ensuring that the input signal is higher than the minimum high-level requirement, thereby ensuring the normal operation of the AND gate circuit U9. A filter capacitor C77 is connected to the power input terminal of the AND gate circuit U9 to provide a smooth power supply voltage for the AND gate circuit U9.

[0022] Further, see Figure 2 The drive control circuit 400 includes a second MOS transistor Q12, a gate of the second MOS transistor Q12 is electrically connected to the third end of the AND gate circuit U9, a drain of the second MOS transistor Q12 is electrically connected to the infrared light emitting diode circuit 500, and a source of the second MOS transistor Q12 is grounded.

[0023] Specifically, the drive control circuit 400 further includes a seventh resistor R78 and an eighth resistor R79. The seventh resistor R78 is electrically connected between the AND gate circuit U9 and the second MOS transistor Q12. One end of the eighth resistor R79 is electrically connected to the gate of the second MOS transistor Q12, and the other end of the eighth resistor R79 is grounded.

[0024] In this embodiment, the drive control circuit 400 is mainly implemented by a MOS transistor. This embodiment uses an NMOS transistor as a switch driver. When the AND gate circuit U9 outputs a high-level signal, the NMOS transistor is turned on, thereby driving the infrared light-emitting diode circuit 500 to emit an infrared signal. In order to ensure the stability of the drive control circuit 400, a current limiting circuit and a pull-down circuit are added to the gate of the MOS transistor. The pull-down resistor can prevent interference or drift of the input signal, ensure that the NMOS operates under the correct logic level, and help ensure that the NMOS transistor remains closed when the logic level is low, thereby preventing malfunction of the circuit.

[0025] Further, see Figure 2 The infrared light emitting diode circuit includes at least one infrared light emitting diode sub-circuit, one end of the infrared light emitting diode sub-circuit is electrically connected to the power supply, and the other end is electrically connected to the drive control circuit.

[0026] Specifically, the infrared light emitting diode subcircuit includes an infrared light emitting diode (ie Figure 2D22 / D23 / D24 / D25) and the ninth resistor (i.e. Figure 2 R69 / R70 / R71 / R72 in the ninth resistor (R69 / R70 / R71 / R72), the positive electrode of the infrared light emitting diode (D22 / D23 / D24 / D25) is electrically connected to the power supply, the negative electrode of the infrared light emitting diode (D22 / D23 / D24 / D25) is electrically connected to one end of the ninth resistor (R69 / R70 / R71 / R72), and the other end of the ninth resistor (R69 / R70 / R71 / R72) is electrically connected to the drive control circuit.

[0027] In this embodiment, when the infrared LED receives a driving signal, it generates a corresponding infrared signal, which is then sent to the receiving end. The receiving end's optoelectronic device converts the signal into an electrical signal, allowing infrared communication to be directly converted into serial communication, facilitating software development and processing. The number of LEDs can be adjusted based on the required transmit power.

[0028] The infrared signal transmission circuit provided by the embodiment of the utility model inverts the serial port signal output by the main control unit through an inverter, then loads the inverted serial port signal onto the carrier signal through an AND gate circuit, and finally drives the infrared light-emitting diode circuit to transmit the infrared signal through a drive control circuit. In this way, the serial port signal can be converted into an infrared signal that can be recognized by the infrared receiving sensor, so that the infrared signal is less subject to interference during the transmission process, thereby improving the reliability of communication. The infrared signal generated by the serial port signal drive has greater frequency flexibility and can meet more diverse communication needs. In addition, by converting the serial port signal into an infrared signal and restoring it to a serial port signal at the signal receiving end, infrared communication can be directly converted into a serial port communication mode, which can facilitate subsequent software control processing.

[0029] The present invention also provides an electronic device including the above-mentioned infrared signal transmitting circuit, wherein the electronic device may be a remote controller for an operating table.

[0030] It should be noted that the various embodiments in the present invention are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other.

[0031] It should also be noted that, in the present invention, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0032] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to be applied in the widest possible manner consistent with the principles and novel features disclosed herein.

Claims

1. An infrared signal transmitting circuit, characterized in that: include: Main control unit, inverter, AND gate circuit, drive control circuit and infrared light emitting diode circuit; The carrier signal sending end of the main control unit is electrically connected to the first end of the AND gate circuit, the serial port signal sending end of the main control unit is electrically connected to the first end of the inverter, the second end of the inverter is electrically connected to the second end of the AND gate circuit, and the drive control circuit is electrically connected to the third end of the AND gate circuit and the infrared light emitting diode circuit respectively.

2. The infrared signal transmitting circuit according to claim 1, characterized in that: The inverter includes a first MOS transistor, a gate of the first MOS transistor is electrically connected to the serial port signal sending end of the main control unit, a drain of the first MOS transistor is electrically connected to the second end of the AND gate circuit; and a source of the first MOS transistor is grounded.

3. The infrared signal transmitting circuit according to claim 2, characterized in that: It also includes a first resistor and a second resistor, the first resistor is electrically connected between the main control unit and the first MOS tube, one end of the second resistor is electrically connected to the power supply, and the other end of the second resistor is electrically connected to the gate of the first MOS tube.

4. The infrared signal transmitting circuit according to claim 1, characterized in that: Also includes a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a first capacitor; The third resistor is electrically connected between the main control unit and the AND gate circuit, the fourth resistor is electrically connected between the inverter and the AND gate circuit, one end of the fifth resistor is electrically connected to the first end of the AND gate circuit, one end of the sixth resistor is electrically connected to the second end of the AND gate circuit, the other ends of the fifth resistor and the sixth resistor, the fourth end of the AND gate circuit, and one end of the first capacitor are all electrically connected to a power supply, and the other end of the first capacitor is grounded.

5. The infrared signal transmitting circuit according to claim 1, characterized in that: The drive control circuit includes a second MOS transistor, a gate of the second MOS transistor is electrically connected to the third end of the AND gate circuit, a drain of the second MOS transistor is electrically connected to the infrared light emitting diode circuit, and a source of the second MOS transistor is grounded.

6. The infrared signal transmitting circuit according to claim 5, characterized in that: The drive control circuit further includes a seventh resistor and an eighth resistor. The seventh resistor is electrically connected between the AND gate circuit and the second MOS transistor. One end of the eighth resistor is electrically connected to the gate of the second MOS transistor, and the other end of the eighth resistor is grounded.

7. The infrared signal transmitting circuit according to claim 1, characterized in that: The infrared light emitting diode circuit includes at least one infrared light emitting diode sub-circuit, one end of the infrared light emitting diode sub-circuit is electrically connected to the power supply, and the other end is electrically connected to the drive control circuit.

8. The infrared signal transmitting circuit according to claim 7, characterized in that: The infrared light-emitting diode sub-circuit includes an infrared light-emitting diode and a ninth resistor, the positive pole of the infrared light-emitting diode is electrically connected to the power supply, the negative pole of the infrared light-emitting diode is electrically connected to one end of the ninth resistor, and the other end of the ninth resistor is electrically connected to the drive control circuit.

9. The infrared signal transmitting circuit according to any one of claims 1 to 8, characterized in that: The main control unit includes a microcontroller unit.

10. An electronic device, characterized in that: The infrared signal transmitting circuit comprises the infrared signal transmitting circuit according to any one of claims 1 to 9.

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