A digital display control circuit with a potentiometer

Abstract

The utility model discloses a kind of digital display control circuit adjusted using potentiometer, potential regulation module includes several knob potentiometer, to supply the resistance value of rotary adjustment voltage dividing resistor, generates dimming control signal;Main control module is based on dimming control signal generation PWM signal, drive module is based on PWM signal generation drive signal, port module exports drive signal to electrical equipment;Main control module is also based on dimming control signal generation digital display signal, display module exports the luminance value corresponding to digital display signal. Thus, based on multiple knob potentiometer, realize stepless dimming, without preset specific luminance level, also based on dimming control signal on nixie tube intuitive display current luminance value, user can be directly dimmed to target luminance accordingly, use experience is good, and dimming flexibility is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of circuit design technology, and in particular to a digital display control circuit that uses potentiometer adjustment. Background Technology

[0002] Currently, most lighting fixture brightness adjustment circuits achieve brightness regulation through fixed resistors or preset voltages. This limits the number of preset brightness levels, preventing flexible adjustment. Furthermore, while these circuits offer multiple brightness levels, they typically only have a single control button. The control logic is as follows: pressing the button turns the light on, pressing it again switches the brightness level, and so on until all brightness levels have been cycled through; pressing the button again turns the light off. As you can imagine, this control method cannot directly adjust to the target brightness level, and users cannot intuitively see the current brightness level. Multiple cycling operations are often required to adjust the light to the desired brightness, resulting in a poor user experience. Utility Model Content

[0003] This embodiment discloses a digital display control circuit that uses potentiometer adjustment, specifically including: Potential adjustment module, main control module, drive module, port module, display module, DIP switch module, communication module, protection module and power supply module; The potential adjustment module includes rotary potentiometers S2, S3, S4, S5 and S6, which are used to adjust the resistance value of the voltage divider resistor by rotating them to generate a dimming control signal. The main control module generates a PWM signal based on the dimming control signal, the drive module generates a drive signal based on the PWM signal, and the port module outputs the drive signal to the electrical device. The main control module also generates a digital display signal based on the dimming control signal, and the display module outputs a brightness value corresponding to the digital display signal.

[0004] As an optional implementation, the main control module uses a main control chip U4, with its 15th pin connected to the rotary potentiometer S2, its 28th pin connected to the rotary potentiometer S3, its 27th pin connected to the rotary potentiometer S4, its 26th pin connected to the rotary potentiometer S5, and its 25th pin connected to the rotary potentiometer S6, in order to acquire the dimming control signals generated by each rotary potentiometer respectively.

[0005] As an optional implementation, the driving module includes a first driving unit composed of driving chip U6 and MOSFET Q1, a first driving unit composed of driving chip U7 and MOSFET Q2, a first driving unit composed of driving chip U8 and MOSFET Q3, a first driving unit composed of driving chip U9 and MOSFET Q4, and a first driving unit composed of driving chip U10 and MOSFET Q5. The 5th pin of the driver chip U6 is connected to the 6th pin of the main control chip U4, the 3rd pin is connected to the gate of the MOS transistor Q1, and the drain of the MOS transistor Q1 outputs a signal. The 5th pin of the driver chip U7 is connected to the 7th pin of the main control chip U4, and the 3rd pin is connected to the gate of the MOS transistor Q2. The drain of the MOS transistor Q2 outputs two signals. The 5th pin of the driver chip U8 is connected to the 9th pin of the main control chip U4, the 3rd pin is connected to the gate of the MOS transistor Q3, and the drain of the MOS transistor Q3 outputs three signals. The 5th pin of the driver chip U9 is connected to the 13th pin of the main control chip U4, and the 3rd pin is connected to the gate of the MOS transistor Q4. The drain of the MOS transistor Q4 outputs four signals. The 5th pin of the driver chip U10 is connected to the 14th pin of the main control chip U4, and the 3rd pin is connected to the gate of the MOS transistor Q5. The drain of the MOS transistor Q5 outputs five signals.

[0006] As an optional implementation, the port submodule uses port P1, with its first pin grounded, the fifth pin connected to the first signal, the sixth pin connected to the second signal, the seventh pin connected to the third signal, the eighth pin connected to the fourth signal, and the ninth pin connected to the fifth signal. The first signal, the second signal, the third signal, the fourth signal, and the fifth signal are integrated and output as the driving signal.

[0007] As an optional implementation, the display module includes a digital tube driver chip U11 and a digital tube DP1; Pin 11 of the main control chip U4 is connected to pin 14 of the digital tube driver chip U11, and pin 12 is connected to pin 15 of the digital tube driver chip U11. The digital tube driver chip U11 acquires the digital display signal including address instructions and timing instructions, and drives the digital tube DP1 to display the brightness value. Pin 2 of the digital tube driver chip U11 is connected to pin 11 of the digital tube DP1, pin 3 is connected to pin 7 of the digital tube DP1, pin 4 is connected to pin 4 of the digital tube DP1, pin 5 is connected to pin 2 of the digital tube DP1, pin 6 is connected to pin 1 of the digital tube DP1, pin 7 is connected to pin 10 of the digital tube DP1, pin 8 is connected to pin 5 of the digital tube DP1, pin 12 is connected to pin 12 of the digital tube DP1, pin 11 is connected to pin 9 of the digital tube DP1, and pin 10 is connected to pin 8 of the digital tube DP1.

[0008] As an optional implementation, the protection module uses an operational amplifier U12, whose first pin is connected to the first pin of the main control chip U4, and whose seventh pin is connected to the third pin of the main control chip U4. The 2nd, 3rd, 5th, and 6th pins of the operational amplifier U12 are grounded to trigger short-circuit protection when the measured operating voltage is higher than the reference voltage.

[0009] As an optional implementation, the communication module uses a wireless communication chip U5, whose first pin is connected to the 31st pin of the main control chip U4, and whose second pin is connected to the 30th pin of the main control chip U4. The 9th pin of the wireless communication chip U5 is connected to the antenna ANT1 to output a 2.4G wireless signal.

[0010] As an optional implementation, the DIP switch module includes a button KEY1 and a DIP switch S1; The button KEY1 is used to control the power supply on / off; Pin 1 of the DIP switch S1 is connected to pin 17 of the main control chip U4, pin 2 is connected to pin 18 of the main control chip U4, pin 3 is connected to pin 19 of the main control chip U4, pin 4 is connected to pin 20 of the main control chip U4, pin 5 is connected to pin 21 of the main control chip U4, and pin 6 is connected to pin 23 of the main control chip U4, for the purpose of performing on / off control on a specific knob potentiometer in the point adjustment module.

[0011] As an optional implementation, the power module includes a conversion unit and a voltage regulator unit; The conversion unit uses a step-down chip U1, whose first pin is connected to the external current via inductor L1 and diode D1. The step-down chip U1 steps down the external current to 10V and outputs it from pin 2; The voltage regulation unit uses voltage regulator U2 and voltage regulator U3. Voltage regulator U2 steps down a 10V current to a 5V operating current, and voltage regulator U3 steps down a 5V operating current to a 3.3V operating current.

[0012] As an optional implementation, the diode D1 is used to prevent reverse connection; A capacitor E2 is connected between pin 1 and pin 4 of the step-down chip U1, and the inductor L1 and the capacitor E2 perform passive filtering. A capacitor E1 is connected between pin 2 and pin 3 of the step-down chip U1 to regulate the output current to 10V.

[0013] Compared with the prior art, this embodiment has the following beneficial effects: In this embodiment, stepless dimming is achieved based on multiple rotary potentiometers, eliminating the need to preset specific brightness levels. Furthermore, the current brightness value is displayed intuitively on the digital tube based on the dimming control signal, allowing users to directly adjust the brightness to the target level. This provides a good user experience and significantly improves the flexibility of dimming. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this embodiment, the accompanying drawings used in the embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the circuit principle of the potential adjustment module in a digital display control circuit using potentiometer adjustment disclosed in this embodiment; Figure 2 This is a schematic diagram of the main control module in a digital display control circuit that uses potentiometer adjustment, as disclosed in this embodiment. Figure 3 This is a schematic diagram of the circuit principle of the drive module in a digital display control circuit that uses potentiometer adjustment, as disclosed in this embodiment. Figure 4 This is a schematic diagram of the circuit principle of the port module in a digital display control circuit using potentiometer adjustment disclosed in this embodiment; Figure 5 This is a schematic diagram of the circuit principle of the display module in a digital display control circuit that uses potentiometer adjustment, as disclosed in this embodiment. Figure 6 This is a schematic diagram of the circuit principle of the DIP switch module in a digital display control circuit that uses potentiometer adjustment, as disclosed in this embodiment. Figure 7This is a schematic diagram of the communication module in a digital display control circuit that uses potentiometer adjustment, as disclosed in this embodiment. Figure 8 This is a schematic diagram of the circuit principle of the protection module in a digital display control circuit that uses potentiometer adjustment, as disclosed in this embodiment. Figure 9 This is a schematic diagram of the power supply module in a digital display control circuit that uses potentiometer adjustment, as disclosed in this embodiment. Detailed Implementation

[0016] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] Please see Figures 1-9 This embodiment discloses a digital display control circuit that uses potentiometer adjustment, comprising: Potential adjustment module, main control module, drive module, port module, display module, DIP switch module, communication module, protection module and power supply module; The potentiometer module includes rotary potentiometers S2, S3, S4, S5, and S6, which are used to adjust the resistance value of the voltage divider resistor by rotating them to generate a dimming control signal. The main control module generates a PWM signal based on the dimming control signal, the drive module generates a drive signal based on the PWM signal, and the port module outputs a drive signal to the electrical equipment. The main control module also generates a digital display signal based on the dimming control signal, and the display module outputs the brightness value corresponding to the digital display signal.

[0018] In this embodiment, by adjusting the resistance value of the voltage divider resistor of each knob potentiometer, the final output dimming control signal can be infinitely adjusted, thus eliminating the need to preset multiple brightness levels and greatly improving the dimming flexibility.

[0019] In addition, a digital display signal corresponding to the brightness value is generated based on the dimming control signal to drive the display module to digitally display the brightness value.

[0020] Therefore, users can intuitively know the current brightness value, and obtain a concrete perception of the value by combining the brightness value with their physical sensation of the current brightness. They can then directly adjust the brightness to the target brightness using the knob potentiometer, resulting in a good user experience.

[0021] As an optional implementation, the main control module uses a main control chip U4, with its 15th pin connected to the rotary potentiometer S2, its 28th pin connected to the rotary potentiometer S3, its 27th pin connected to the rotary potentiometer S4, its 26th pin connected to the rotary potentiometer S5, and its 25th pin connected to the rotary potentiometer S6, in order to acquire the dimming control signals generated by each rotary potentiometer respectively.

[0022] As an optional implementation, the driving module includes a first driving unit composed of driving chip U6 and MOSFET Q1, a first driving unit composed of driving chip U7 and MOSFET Q2, a first driving unit composed of driving chip U8 and MOSFET Q3, a first driving unit composed of driving chip U9 and MOSFET Q4, and a first driving unit composed of driving chip U10 and MOSFET Q5. Pin 5 of the driver chip U6 is connected to pin 6 of the main control chip U4, and pin 3 is connected to the gate of MOSFET Q1. The drain of MOSFET Q1 outputs one signal. Pin 5 of the driver chip U7 is connected to pin 7 of the main control chip U4, and pin 3 is connected to the gate of MOSFET Q2. The drain of MOSFET Q2 outputs two signals. The 5th pin of the driver chip U8 is connected to the 9th pin of the main control chip U4, and the 3rd pin is connected to the gate of the MOSFET Q3. The drain of the MOSFET Q3 outputs three signals. The 5th pin of the driver chip U9 is connected to the 13th pin of the main control chip U4, and the 3rd pin is connected to the gate of the MOSFET Q4. The drain of the MOSFET Q4 outputs four signals. The 5th pin of the driver chip U10 is connected to the 14th pin of the main control chip U4, and the 3rd pin is connected to the gate of the MOSFET Q5. The drain of the MOSFET Q5 outputs five signals.

[0023] As an optional implementation, the port submodule uses port P1, with pin 1 grounded, pin 5 connected to one signal, pin 6 connected to two signals, pin 7 connected to three signals, pin 8 connected to four signals, and pin 9 connected to five signals. The first, second, third, fourth, and fifth signals are integrated and output as drive signals.

[0024] Here, the user can rotate the various knobs and potentiometers to output multiple signals. One signal can be the red light signal in the RGB analog signal, the second signal can be the green light signal in the RGB analog signal, the third signal can be the blue light signal in the RGB analog signal, the fourth signal can be the cool white light signal, and the fifth signal can be the warm white light signal.

[0025] Accordingly, all signals are integrated and output as drive signals to achieve diverse stepless dimming.

[0026] As an optional implementation, the display module includes a digital tube driver chip U11 and a digital tube DP1; Pin 11 of the main control chip U4 is connected to pin 14 of the digital tube driver chip U11, and pin 12 is connected to pin 15 of the digital tube driver chip U11. The digital tube driver chip U11 obtains the digital display signal including address instructions and timing instructions, and drives the digital tube DP1 to display the brightness value. Pin 2 of the digital tube driver chip U11 is connected to pin 11 of digital tube DP1, pin 3 is connected to pin 7 of digital tube DP1, pin 4 is connected to pin 4 of digital tube DP1, pin 5 is connected to pin 2 of digital tube DP1, pin 6 is connected to pin 1 of digital tube DP1, pin 7 is connected to pin 10 of digital tube DP1, pin 8 is connected to pin 5 of digital tube DP1, pin 12 is connected to pin 12 of digital tube DP1, pin 11 is connected to pin 9 of digital tube DP1, and pin 10 is connected to pin 8 of digital tube DP1.

[0027] Here, the digital display signal represents the current lighting brightness as a relative brightness value. Thus, when users need to increase or decrease the brightness, they can intuitively assess the current lighting brightness based on the brightness value and estimate the target brightness value, thereby achieving intuitive dimming without having to repeatedly adjust and try different brightness levels.

[0028] As an optional implementation, the protection module uses an operational amplifier U12, whose first pin is connected to the first pin of the main control chip U4, and whose seventh pin is connected to the third pin of the main control chip U4. Pins 2, 3, 5, and 6 of operational amplifier U12 are grounded to trigger short-circuit protection when the measured operating voltage is higher than the reference voltage.

[0029] Here, when the operational amplifier U12 detects an overvoltage, it triggers the short-circuit protection to discharge to ground and prevent a safety accident.

[0030] As an optional implementation, the communication module uses a wireless communication chip U5, whose first pin is connected to the 31st pin of the main control chip U4, and whose second pin is connected to the 30th pin of the main control chip U4. Pin 9 of the wireless communication chip U5 is connected to antenna ANT1 to output a 2.4G wireless signal.

[0031] Here, the communication module can be used to wirelessly output operating parameters, and can also be used to receive control commands from other external devices, thus enabling Internet of Things (IoT) access.

[0032] As an optional implementation, the DIP switch module includes a button KEY1 and a DIP switch S1; Button KEY1 is used to control the power supply on / off; Pin 1 of DIP switch S1 is connected to pin 17 of main control chip U4, pin 2 is connected to pin 18 of main control chip U4, pin 3 is connected to pin 19 of main control chip U4, pin 4 is connected to pin 20 of main control chip U4, pin 5 is connected to pin 21 of main control chip U4, and pin 6 is connected to pin 23 of main control chip U4, in order to perform on / off control on specific knob potentiometers in the point position adjustment module.

[0033] Here, the power supply to the entire control system is controlled by buttons, while each DIP switch can control the opening and closing of specific knobs and potentiometers to adapt to different needs and wiring schemes.

[0034] As an optional implementation, the power module includes a conversion unit and a voltage regulator unit; The conversion unit uses a step-down chip U1, whose first pin is connected to the external current via inductor L1 and diode D1. The step-down chip U1 steps down the external current to 10V and outputs it from pin 2; The voltage regulation unit uses voltage regulator U2 and voltage regulator U3. Voltage regulator U2 steps down the 10V current to a 5V operating current, and voltage regulator U3 steps down the 5V operating current to a 3.3V operating current.

[0035] As an optional implementation, diode D1 is used to prevent reverse connection; A capacitor E2 is connected between pin 1 and pin 4 of the step-down chip U1, and the inductor L1 and capacitor E2 perform passive filtering. A capacitor E1 is connected between pin 2 and pin 3 of the step-down chip U1 to regulate the output current to 10V.

[0036] Here, the voltage regulator step-down unit reduces the 10V current in two stages, outputting a 5V operating current and a 3.3V operating current.

[0037] Compared with the prior art, this embodiment has the following beneficial effects: In this embodiment, stepless dimming is achieved based on multiple rotary potentiometers, eliminating the need to preset specific brightness levels. Furthermore, the current brightness value is displayed intuitively on the digital tube based on the dimming control signal, allowing users to directly adjust the brightness to the target level. This provides a good user experience and significantly improves the flexibility of dimming.

Claims

1. A digital display control circuit using potentiometer adjustment, characterized in that, include: Potential adjustment module, main control module, drive module, port module, display module, DIP switch module, communication module, protection module and power supply module; The potential adjustment module includes rotary potentiometers S2, S3, S4, S5 and S6, which are used to adjust the resistance value of the voltage divider resistor by rotating them to generate a dimming control signal. The main control module generates a PWM signal based on the dimming control signal, the drive module generates a drive signal based on the PWM signal, and the port module outputs the drive signal to the electrical device. The main control module also generates a digital display signal based on the dimming control signal, and the display module outputs a brightness value corresponding to the digital display signal.

2. The digital display control circuit using potentiometer adjustment according to claim 1, characterized in that, include: The main control module uses a main control chip U4, with its 15th pin connected to the rotary potentiometer S2, its 28th pin connected to the rotary potentiometer S3, its 27th pin connected to the rotary potentiometer S4, its 26th pin connected to the rotary potentiometer S5, and its 25th pin connected to the rotary potentiometer S6, in order to acquire the dimming control signals generated by each rotary potentiometer respectively.

3. The digital display control circuit using potentiometer adjustment according to claim 2, characterized in that, include: The driving module includes a first driving unit composed of driving chip U6 and MOSFET Q1, a first driving unit composed of driving chip U7 and MOSFET Q2, a first driving unit composed of driving chip U8 and MOSFET Q3, a first driving unit composed of driving chip U9 and MOSFET Q4, and a first driving unit composed of driving chip U10 and MOSFET Q5. The 5th pin of the driver chip U6 is connected to the 6th pin of the main control chip U4, the 3rd pin is connected to the gate of the MOS transistor Q1, and the drain of the MOS transistor Q1 outputs a signal. The 5th pin of the driver chip U7 is connected to the 7th pin of the main control chip U4, and the 3rd pin is connected to the gate of the MOS transistor Q2. The drain of the MOS transistor Q2 outputs two signals. The 5th pin of the driver chip U8 is connected to the 9th pin of the main control chip U4, the 3rd pin is connected to the gate of the MOS transistor Q3, and the drain of the MOS transistor Q3 outputs three signals. The 5th pin of the driver chip U9 is connected to the 13th pin of the main control chip U4, and the 3rd pin is connected to the gate of the MOS transistor Q4. The drain of the MOS transistor Q4 outputs four signals. The 5th pin of the driver chip U10 is connected to the 14th pin of the main control chip U4, and the 3rd pin is connected to the gate of the MOS transistor Q5. The drain of the MOS transistor Q5 outputs five signals.

4. A digital display control circuit using potentiometer adjustment according to claim 3, characterized in that, include: The port module uses port P1, with its first pin grounded, the fifth pin connected to the first signal, the sixth pin connected to the second signal, the seventh pin connected to the third signal, the eighth pin connected to the fourth signal, and the ninth pin connected to the fifth signal. The first signal, the second signal, the third signal, the fourth signal, and the fifth signal are integrated and output as the driving signal.

5. A digital display control circuit using potentiometer adjustment according to claim 3, characterized in that, include: The display module includes a digital tube driver chip U11 and a digital tube DP1; Pin 11 of the main control chip U4 is connected to pin 14 of the digital tube driver chip U11, and pin 12 is connected to pin 15 of the digital tube driver chip U11. The digital tube driver chip U11 acquires the digital display signal including address instructions and timing instructions, and drives the digital tube DP1 to display the brightness value. Pin 2 of the digital tube driver chip U11 is connected to pin 11 of the digital tube DP1, pin 3 is connected to pin 7 of the digital tube DP1, pin 4 is connected to pin 4 of the digital tube DP1, pin 5 is connected to pin 2 of the digital tube DP1, pin 6 is connected to pin 1 of the digital tube DP1, pin 7 is connected to pin 10 of the digital tube DP1, pin 8 is connected to pin 5 of the digital tube DP1, pin 12 is connected to pin 12 of the digital tube DP1, pin 11 is connected to pin 9 of the digital tube DP1, and pin 10 is connected to pin 8 of the digital tube DP1.

6. A digital display control circuit using potentiometer adjustment according to claim 2, characterized in that, include: The protection module uses an operational amplifier U12, whose first pin is connected to the first pin of the main control chip U4, and whose seventh pin is connected to the third pin of the main control chip U4. The 2nd, 3rd, 5th, and 6th pins of the operational amplifier U12 are grounded to trigger short-circuit protection when the measured operating voltage is higher than the reference voltage.

7. A digital display control circuit using potentiometer adjustment according to claim 2, characterized in that, include: The communication module uses a wireless communication chip U5, whose first pin is connected to the 31st pin of the main control chip U4, and whose second pin is connected to the 30th pin of the main control chip U4. The 9th pin of the wireless communication chip U5 is connected to the antenna ANT1 to output a 2.4G wireless signal.

8. A digital display control circuit using potentiometer adjustment according to claim 2, characterized in that, include: The dial switch module includes a button KEY1 and a dial switch S1; The button KEY1 is used to control the power supply on / off; Pin 1 of the DIP switch S1 is connected to pin 17 of the main control chip U4, pin 2 is connected to pin 18 of the main control chip U4, pin 3 is connected to pin 19 of the main control chip U4, pin 4 is connected to pin 20 of the main control chip U4, pin 5 is connected to pin 21 of the main control chip U4, and pin 6 is connected to pin 23 of the main control chip U4, for the purpose of controlling the opening and closing of a specific rotary potentiometer in the potentiometer adjustment module.

9. A digital display control circuit using potentiometer adjustment according to claim 1, characterized in that, include: The power module includes a conversion unit and a voltage regulator unit; The conversion unit uses a step-down chip U1, whose first pin is connected to the external current via inductor L1 and diode D1. The step-down chip U1 steps down the external current to 10V and outputs it from pin 2; The voltage regulation unit uses voltage regulator U2 and voltage regulator U3. Voltage regulator U2 steps down a 10V current to a 5V operating current, and voltage regulator U3 steps down a 5V operating current to a 3.3V operating current.

10. A digital display control circuit using potentiometer adjustment according to claim 9, characterized in that, include: The diode D1 is used to prevent reverse connection; A capacitor E2 is connected between pin 1 and pin 4 of the step-down chip U1, and the inductor L1 and the capacitor E2 perform passive filtering. A capacitor E1 is connected between pin 2 and pin 3 of the step-down chip U1 to regulate the output current to 10V.

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