Multifunctional liquid crystal module circuit

Abstract

The utility model discloses a multifunctional liquid crystal module circuit, which comprises a liquid crystal display circuit module used for displaying data and state information in real time; the commercial power voltage detection circuit module, the temperature detection circuit module, the audio adjusting circuit module, the signal access detection circuit module, the signal distortion detection circuit module, the signal overload protection circuit module and the signal amplitude feedback circuit module are connected with the liquid crystal display circuit module. According to the utility model, the liquid crystal display circuit module is connected with a plurality of different functional circuit modules, so that the functional diversity of the liquid crystal display module is greatly increased, and a user can check the working state of each module of the current system in real time; in addition, management measures such as circuit protection can be taken for the system in time when the system is overheated or overloaded, and meanwhile the technical development threshold of a user is greatly reduced through the highly-integrated multifunctional liquid crystal display module.

Description

Technical Field

[0001] This disclosure relates to the field of liquid crystal module circuit technology, and in particular to a multifunctional liquid crystal module circuit. Background Technology

[0002] Traditional LCD modules can be connected to microcontrollers and other control modules via simple external interfaces, offering high data transmission stability and reliability. They can also be programmed to achieve specific graphic and text display functions and effects according to user needs. However, this also raises the technical development threshold for users of traditional LCD modules. Furthermore, due to the relatively limited functionality of traditional LCD modules, they lack mechanisms for detecting and providing feedback on system operating temperature, voltage, and critical signals. This means users cannot monitor the real-time operating status of each module, nor can they implement circuit protection measures in case of overheating or overload. This increases the risk of unforeseen factors during actual use and will severely restrict product development. Utility Model Content

[0003] This disclosure provides a multifunctional liquid crystal module circuit to solve one of the technical problems recognized by the inventors.

[0004] This disclosure provides a multifunctional liquid crystal module circuit, including a liquid crystal display circuit module for real-time display of data and status information; and a circuit connected to the liquid crystal display circuit module.

[0005] The mains voltage detection circuit module is used to detect the magnitude of the currently input mains voltage.

[0006] Temperature detection circuit module, used for real-time temperature detection;

[0007] The audio adjustment circuit module is used to dynamically adjust the input and output audio volume.

[0008] The signal input detection circuit module is used to detect whether there is an input audio signal.

[0009] The signal distortion detection circuit module is used to detect the distortion of the input signal amplitude.

[0010] The signal overload protection circuit module is used to detect overload of the input signal amplitude and provide circuit protection.

[0011] The signal amplitude feedback circuit module is used to detect and feedback the amplitude of the current input signal in real time, and provides visual feedback through indicator lights.

[0012] Preferably, the mains voltage detection circuit module includes a bridge rectifier circuit module connected to the mains input terminal. The bridge rectifier circuit module is connected to a DC voltage regulator circuit module and a filter circuit module. The bridge rectifier circuit module includes diodes D2, D3, D4, and D5. The positive terminals of diodes D2 and D3 are connected to the mains input terminal, and the negative terminals of diodes D4 and D5 are connected to the mains input terminal. The negative terminals of diodes D2 and D3 are interconnected, and the positive terminals of diodes D4 and D5 are interconnected. The DC voltage regulator circuit module includes a chip U1. The VIN pin of chip U1 is connected to capacitor C3 and electrolytic capacitor E1, respectively. The OUT pin of chip U1 is connected to capacitor C4 and electrolytic capacitor E1, respectively. The filter circuit includes a potentiometer VR5, whose third pin is connected to the negative terminal of diode D2. A resistor R3 is connected to the second pin of potentiometer VR5, and a diode D6 is connected to the resistor R3. Diode D6 is connected to the positive terminal of diode D5. An AC display terminal is connected between resistor R3 and diode D6. A capacitor C6 and a resistor R4 are connected to the AC display terminal. One end of capacitor C6 and resistor R4 is connected to the positive terminal of diode D5. A resistor R2 and an electrolytic capacitor E3 are connected in parallel between the negative terminal of diode D2 and the positive terminal of diode D5.

[0013] Preferably, the temperature detection circuit module includes an interface CN1, and the interface CN1 is connected to a temperature sensor.

[0014] Preferably, the audio adjustment circuit module includes potentiometers VR1B, VR1A, VR2B, and VR2A, wherein potentiometer VR1A is connected to capacitor C8, and potentiometer VR2A is connected to capacitor C9.

[0015] Preferably, the signal access detection circuit module includes resistor R5 and resistor R11, with resistor R26 and potentiometer VR3 connected in parallel at one end of resistor R5, and resistor R27 and potentiometer VR4 connected in parallel at one end of resistor R11.

[0016] Preferably, the signal distortion detection circuit module includes resistors R6 and R13. One end of resistor R6 is connected to one end of resistor R9 and the base of transistor Q1, and the other end of resistor R9 is connected to the emitter of transistor Q1. One end of resistor R6 is connected to one end of resistor R15 and the base of transistor Q3, and the other end of resistor R15 is connected to the emitter of transistor Q3.

[0017] Preferably, the signal overload protection circuit includes resistors R7 and R14. One end of resistor R7 is connected to one end of resistor R10 and the base of transistor Q2, and the other end of resistor R10 is connected to the emitter of transistor Q2. One end of resistor R14 is connected to one end of resistor R16 and the base of transistor Q4, and the other end of resistor R16 is connected to the emitter of transistor Q4.

[0018] Preferably, the signal amplitude feedback circuit module includes a first signal amplitude feedback circuit module and a second signal amplitude feedback circuit module. The first signal amplitude feedback circuit module includes resistors R12, R17, R18, and R19, diodes D1, D7, and D14, transistors Q5, Q6, and Q7, and an electrolytic capacitor EC1. Resistor R12 is connected in series with resistor R17. The base of transistor Q5 is connected between resistors R12 and R17. The base of transistor Q5 is connected to diode D1. The emitter of transistor Q5 is connected to the base of transistor Q6. Resistor R18 and electrolytic capacitor EC1 are connected in parallel between the emitter of transistor Q5 and the base of transistor Q6. The emitter of transistor Q7 is connected to resistor R19 and diode D7. The collector of transistor Q7 is connected to diode D14. The structure of the second signal amplitude feedback circuit module is the same as that of the first signal amplitude feedback circuit module.

[0019] The main advantages of this disclosure are: This utility model connects multiple different functional circuit modules through a liquid crystal display circuit module, which greatly increases the functional diversity of the liquid crystal display module. Users can not only view the working status of each module of the current system in real time, but also take timely management measures such as circuit protection when the system experiences over-temperature or overload. At the same time, the highly integrated multi-functional liquid crystal display module also greatly reduces the technical development threshold for users.

[0020] It should be understood that both the foregoing general description and the following detailed description are for illustrative purposes and do not necessarily limit the scope of this disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of this disclosure. Furthermore, the specification and drawings serve to explain the principles of this disclosure. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a circuit diagram of a multi-functional liquid crystal module according to an embodiment of the present disclosure;

[0023] Figure 2 This is a circuit diagram of a liquid crystal display circuit module according to an embodiment of the present disclosure;

[0024] Figure 3 This is a circuit diagram of the mains voltage detection circuit module according to an embodiment of the present disclosure;

[0025] Figure 4 This is a circuit diagram of the temperature detection circuit module according to an embodiment of the present disclosure;

[0026] Figure 5 This is a circuit diagram of the audio adjustment circuit module according to an embodiment of the present disclosure;

[0027] Figure 6 This is a circuit diagram of the signal access detection circuit module according to an embodiment of the present disclosure;

[0028] Figure 7 This is a circuit diagram of the signal distortion detection circuit module according to an embodiment of the present disclosure;

[0029] Figure 8 This is a circuit diagram of a signal overload protection circuit module according to an embodiment of the present disclosure;

[0030] Figure 9 This is a circuit diagram of the signal amplitude feedback circuit module according to an embodiment of the present disclosure;

[0031] Icons: 100 - LCD display circuit module; 200 - Mains voltage detection circuit module; 300 - Temperature detection circuit module; 400 - Audio adjustment circuit module; 500 - Signal input detection circuit module; 600 - Signal distortion detection circuit module; 700 - Signal overload protection circuit module; 800 - Signal amplitude feedback circuit module. Detailed Implementation

[0032] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments.

[0033] Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0034] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0036] Example

[0037] like Figure 1 As shown, this embodiment provides a multifunctional liquid crystal module circuit, including: a liquid crystal display circuit module 100 for real-time display of data and status information; and a mains voltage detection circuit module 200 connected to the liquid crystal display circuit module 100 for detecting the magnitude of the currently input mains voltage; a temperature detection circuit module 300 for real-time temperature detection; an audio adjustment circuit module 400 for dynamically adjusting the volume of input and output audio; a signal access detection circuit module 500 for detecting whether there is an input audio signal; a signal distortion detection circuit module 600 for detecting distortion of the input signal amplitude; a signal overload protection circuit module 700 for overload detection of the input signal amplitude and circuit protection; and a signal amplitude feedback circuit module 800 for real-time detection and feedback of the amplitude of the currently input signal, and visual feedback via an indicator light.

[0038] like Figure 2 As shown, J1 forms the LCD display circuit section. All the operating status of the system, including the input mains voltage, operating temperature, signal input, volume value, signal distortion, overload protection, etc., are displayed on the display interface through this section.

[0039] like Figure 3 As shown, the mains voltage detection circuit module 200 includes a bridge rectifier circuit module connected to the mains input terminal, and the bridge rectifier circuit module is connected to a DC voltage regulator circuit module and a filter circuit module.

[0040] Specifically, the bridge rectifier circuit module includes diodes D2, D3, D4, and D5. The positive terminals of diodes D2 and D3 are connected to the AC mains input terminal, and the negative terminals of diodes D4 and D5 are also connected to the AC mains input terminal. The negative terminals of diodes D2 and D3 are interconnected, and the positive terminals of diodes D4 and D5 are interconnected. Diodes D2, D3, D4, and D5 perform full-bridge rectification on the input AC 10V / 50Hz AC power signal. The maximum value of the rectified pulsating DC voltage is 1.414 times the AC effective value of 10V, i.e., 14.14V.

[0041] Specifically, the DC voltage regulator circuit module includes a chip U1. The VIN pin of chip U1 is connected to capacitor C3 and electrolytic capacitor E1, and the OUT pin of chip U1 is connected to capacitor C4 and electrolytic capacitor E2. The VIN pin of chip U1 is connected to the negative terminal of diode D2. Chip U1, capacitor C3, electrolytic capacitor E1, capacitor C4, and electrolytic capacitor E2 filter and reduce the voltage of the pulsating DC power signal, providing a stable DC power signal for this circuit.

[0042] Specifically, the filtering circuit includes a potentiometer VR5. The third pin of the potentiometer VR5 is connected to the negative terminal of the diode D2. The second pin of the potentiometer VR5 is connected to a resistor R3. The resistor R3 is connected to a diode D6, which is connected to the positive terminal of the diode D5. An AC display terminal is connected between the resistor R3 and the diode D6. The AC display terminal is connected to a capacitor C6 and a resistor R4. One end of the capacitor C6 and the resistor R4 is connected to the positive terminal of the diode D5. A resistor R2 and an electrolytic capacitor E3 are connected in parallel between the negative terminal of the diode D2 and the positive terminal of the diode D5. The pulsating DC voltage is filtered by the electrolytic capacitor E3, resulting in a smooth 14.14V DC voltage signal. This DC voltage signal is then divided by the potentiometer VR5 and resistors R3 and R4. The voltage obtained at test point M-VI is related to the current resistance value of the potentiometer VR5, and its value can be calculated using the formula R4 / (R4+R3+VVR5). Capacitor C6 can bypass interference signals at the measurement point, reducing interference to the actual signal. Diode D6 is a Zener diode with a Zener voltage of 4.7V. When the voltage at the measurement point exceeds 4.7V, Zener diode D6 will break down, ensuring that the voltage at the measurement point remains at a maximum of 4.7V to power the downstream measurement devices.

[0043] like Figure 4As shown, the temperature detection circuit module 300 includes an interface CN1, which is connected to a temperature sensor. CN1 in the temperature detection circuit module 300 can simultaneously detect two temperature sensors, NTC1 and NTC2. The detected value is an analog quantity. The analog quantity is first converted into a digital quantity by the ADC converter in the algorithm section, and then the digital quantity is analyzed and looked up in a table to finally obtain the actual temperature value.

[0044] like Figure 5 As shown, the audio adjustment circuit module 400 includes potentiometers VR1B, VR1A, VR2B, and VR2A. Potentiometer VR1A is connected to capacitor C8, and potentiometer VR2A is connected to capacitor C9. Potentiometers VR1B and VR2B are adjustable potentiometers, used to divide the input VR1-IN and VR2-IN signals by adjusting the potentiometers. The divided signals are attenuated by 0-100 times depending on the potentiometer's current position. Similarly, potentiometers VR1A and VR2A are adjustable potentiometers, used to divide the output CH1-db and CH2-db signals by adjusting the potentiometers. The divided signals are attenuated by 0-100 times depending on the potentiometer's current position. Capacitors C7 and C8 bypass some glitches, ultimately achieving independent volume adjustment for the input and output signals respectively.

[0045] like Figure 6 As shown, the signal access detection circuit module 500 includes resistors R5 and R11. Resistor R26 and potentiometer VR3 are connected in parallel to one end of resistor R5, and resistor R27 and potentiometer VR4 are connected in parallel to one end of resistor R11. The first signal detection circuit consists of resistors R5, R26, and potentiometer VR3. First, potentiometer VR3 is adjusted to a limit position, then connected in parallel with resistor R26, and finally connected in series with resistor R5. The voltage value at the final detection point M-SIGNAL1 can be calculated using the formula ((R26*VR3) / (R26+VR3)) / (R5+(R26*VR3) / (R26+VR3)). The trigger threshold of the first signal detection circuit can be changed by adjusting the value of potentiometer VR3 according to actual needs. Similarly, the second signal detection circuit consists of resistors R11, R27, and potentiometer VR4, and its working principle and implementation are exactly the same as the first circuit.

[0046] like Figure 7As shown, the signal distortion detection circuit module 600 includes resistors R6 and R13. One end of resistor R6 is connected to one end of resistor R9 and the base of transistor Q1, and the other end of resistor R9 is connected to the emitter of transistor Q1. One end of resistor R6 is connected to one end of resistor R15 and the base of transistor Q3, and the other end of resistor R15 is connected to the emitter of transistor Q3. The first signal distortion detection circuit module 600, composed of resistors R6, R9, and transistor Q1, amplifies the initial small input signal CLIP-A through transistor Q1. When the amplified voltage signal M-CLP1 goes low, it is considered that the input signal is distorted. Similarly, the second signal distortion detection circuit module 600, composed of resistors R13, R15, and transistor Q3, operates on the same principle and is implemented in the same way as the first one.

[0047] like Figure 8 As shown, the signal overload protection circuit includes resistors R7 and R14. One end of resistor R7 is connected to one end of resistor R10 and the base of transistor Q2, and the other end of resistor R10 is connected to the emitter of transistor Q2. One end of resistor R14 is connected to one end of resistor R16 and the base of transistor Q4, and the other end of resistor R16 is connected to the emitter of transistor Q4. The first signal overload protection circuit module 700, composed of resistors R7, R10, and transistor Q2, amplifies the initial small input signal CLIP-A through transistor Q2. When the amplified voltage signal M-PROTECT1 goes low and the duration exceeds the threshold specified by the algorithm, it is considered that the input signal is overloaded, and the system needs to be protected. Similarly, the second signal overload protection circuit module 700, composed of resistors R14, R16, and transistor Q4, operates on the same principle and is implemented in the same way as the first circuit.

[0048] like Figure 9As shown, the signal amplitude feedback circuit module 800 includes a first signal amplitude feedback circuit module 800 and a second signal amplitude feedback circuit module 800. The first signal amplitude feedback circuit module 800 includes resistors R12, R17, R18, R19, diodes D1, D7, D14, transistors Q5, Q6, Q7, and an electrolytic capacitor EC1. Resistor R12 and resistor R17 are connected in series, and the base of transistor Q5 is connected between resistors R12 and R17. The base of transistor Q5 is connected to diode D1, the emitter of transistor Q5 is connected to the base of transistor Q6, a resistor R18 and an electrolytic capacitor EC1 are connected in parallel between the emitter of transistor Q5 and the base of transistor Q6, the emitter of transistor Q7 is connected to resistor R19 and diode D7, and the collector of transistor Q7 is connected to diode D14. The structure of the second signal amplitude feedback circuit module 800 is the same as that of the first signal amplitude feedback circuit module 800.

[0049] First, when the input signal SIG-A is 0V, transistor Q5 will be in the cutoff state. At this time, a circuit is formed by resistor R19, transistors Q7 and Q6, and resistor R18. Transistors Q7 and Q6 will both be in saturation. The final voltage across resistor R18 is 9.54V, calculated as (R18 / R18+R19)*(VCC-(VQ7B+VQ6B)). Since transistors Q7 and Q6 are in saturation, status indicator lights D7 and D14 remain off. As the input signal SIG-A is gradually increased, transistor Q5 will gradually change from the cutoff state to the amplification state, and the voltage across resistor R18 will gradually increase. At this time, transistors Q7 and Q6 will gradually change from saturation to amplification, and indicator light D14 will change from off to on. When the input signal SIG-A is further increased, indicator light D7 will also change from off to on. As the input signal SIG-A gradually decreases, the indicator lights D7 and D14 will gradually change from on to off. Similarly, the second signal amplitude feedback circuit module 800 consists of resistors R24 and R25, diode D13, transistor Q10, resistor R23, electrolytic capacitor EC2, transistors Q8 and Q9, resistor R22, and diodes D12 and D15. Its working principle and implementation method are the same as those of the first signal amplitude feedback circuit module 800.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A multifunctional liquid crystal module circuit, characterized in that, include: The liquid crystal display circuit module is used to display data and status information in real time; And connected to the liquid crystal display circuit module, The mains voltage detection circuit module is used to detect the magnitude of the currently input mains voltage. Temperature detection circuit module, used for real-time temperature detection; The audio adjustment circuit module is used to dynamically adjust the input and output audio volume. The signal input detection circuit module is used to detect whether there is an input audio signal. The signal distortion detection circuit module is used to detect the distortion of the input signal amplitude. The signal overload protection circuit module is used to detect overload of the input signal amplitude and provide circuit protection. The signal amplitude feedback circuit module is used to detect and feedback the amplitude of the current input signal in real time, and provides visual feedback through indicator lights.

2. The multifunctional liquid crystal module circuit according to claim 1, characterized in that, The mains voltage detection circuit module includes a bridge rectifier circuit module connected to the mains input terminal. The bridge rectifier circuit module is connected to a DC voltage regulator circuit module and a filter circuit module. The bridge rectifier circuit module includes diodes D2, D3, D4, and D5. The positive terminals of diodes D2 and D3 are connected to the mains input terminal, and the negative terminals of diodes D4 and D5 are also connected to the mains input terminal. The negative terminals of diodes D2 and D3 are interconnected, and the positive terminals of diodes D4 and D5 are interconnected. The DC voltage regulator circuit module includes a chip U1. The VIN pin of chip U1 is connected to capacitor C3 and electrolytic capacitor E1, and the OUT pin of chip U1 is connected to capacitor C4 and electrolytic capacitor E1, respectively. The filter circuit includes a potentiometer VR5, whose third pin is connected to the negative terminal of diode D2. A resistor R3 is connected to the second pin of potentiometer VR5, and a diode D6 is connected to the resistor R3. Diode D6 is connected to the positive terminal of diode D5. An AC display terminal is connected between resistor R3 and diode D6. A capacitor C6 and a resistor R4 are connected to the AC display terminal. One end of capacitor C6 and resistor R4 is connected to the positive terminal of diode D5. A resistor R2 and an electrolytic capacitor E3 are connected in parallel between the negative terminal of diode D2 and the positive terminal of diode D5.

3. The multifunctional liquid crystal module circuit according to claim 1, characterized in that, The temperature detection circuit module includes an interface CN1, which is connected to a temperature sensor.

4. The multifunctional liquid crystal module circuit according to claim 1, characterized in that, The audio adjustment circuit module includes potentiometers VR1B, VR1A, VR2B, and VR2A. Potentiometer VR1A is connected to capacitor C8, and potentiometer VR2A is connected to capacitor C9.

5. A multifunctional liquid crystal module circuit according to claim 1, characterized in that, The signal access detection circuit module includes resistor R5 and resistor R11. Resistor R26 and potentiometer VR3 are connected in parallel at one end of resistor R5, and resistor R27 and potentiometer VR4 are connected in parallel at one end of resistor R11.

6. A multifunctional liquid crystal module circuit according to claim 1, characterized in that, The signal distortion detection circuit module includes resistors R6 and R13. One end of resistor R6 is connected to one end of resistor R9 and the base of transistor Q1. The other end of resistor R9 is connected to the emitter of transistor Q1. One end of resistor R6 is connected to one end of resistor R15 and the base of transistor Q3. The other end of resistor R15 is connected to the emitter of transistor Q3.

7. A multifunctional liquid crystal module circuit according to claim 1, characterized in that, The signal overload protection circuit includes resistors R7 and R14. One end of resistor R7 is connected to one end of resistor R10 and the base of transistor Q2. The other end of resistor R10 is connected to the emitter of transistor Q2. One end of resistor R14 is connected to one end of resistor R16 and the base of transistor Q4. The other end of resistor R16 is connected to the emitter of transistor Q4.

8. A multifunctional liquid crystal module circuit according to claim 1, characterized in that, The signal amplitude feedback circuit module includes a first signal amplitude feedback circuit module and a second signal amplitude feedback circuit module. The first signal amplitude feedback circuit module includes resistors R12, R17, R18, and R19, diodes D1, D7, and D14, transistors Q5, Q6, and Q7, and an electrolytic capacitor EC1. Resistor R12 and resistor R17 are connected in series. The base of transistor Q5 is connected between resistors R12 and R17. The base of transistor Q5 is connected to diode D1. The emitter of transistor Q5 is connected to the base of transistor Q6. Resistor R18 and electrolytic capacitor EC1 are connected in parallel between the emitter of transistor Q5 and the base of transistor Q6. The emitter of transistor Q7 is connected to resistor R19 and diode D7. The collector of transistor Q7 is connected to diode D14. The structure of the second signal amplitude feedback circuit module is the same as that of the first signal amplitude feedback circuit module.

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