Household appliance knob screen control system

Abstract

The utility model discloses a household appliance knob screen control system, which belongs to the technical field of household appliance control systems, and comprises an MCU (Microprogrammed Control Unit) main control module, an encoder, a touch control module, an LED (Light Emitting Diode) driving module, a functional area and lamp ring circuit and a display module, the touch control module is used for receiving touch control signals and transmitting the touch control signals to the MCU main control module, the encoder receives pulse signals generated by rotation of the knob to judge the rotation direction and the rotation amount of the knob so as to adjust gears or numerical values, the LED driving module controls display of time information, and the functional area and lamp ring circuit controls light display of the lamp ring area and the functional area. The display module receives control signals from the MCU master control module and displays time information, operation modes and corresponding gears and numerical values, the integrated touch control and display functions are provided, and a user interface is optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of home appliance control systems, and particularly to a knob screen control system for home appliances. Background Technique

[0002] With the development of modern home appliances, their functions have become increasingly diverse. However, in terms of control methods, the traditional button stacking mode still dominates. This design not only makes the control panel complex and bulky, but also causes difficulties in cleaning and inconvenience in operation during daily use. The existing home appliance control methods are generally divided into two categories: one is color screen touch control. Although this method enriches the human-computer interaction interface, it also increases the display area. After long-term use, the display effect will be affected, especially the changes in chromaticity and brightness. The other is mechanical button control. Although this method can reduce the display area, its functions are monotonous and cannot provide a diverse operation experience. In addition, in many traditional home appliances, the display part and the operation part are often separated. Users need to observe the display screen to obtain information and then operate buttons or knobs to control the device. This design causes users to frequently switch their line of sight between the display screen and the control area during operation, affecting the operation efficiency and comfort. Content of the Utility Model

[0003] The purpose of the utility model is to provide a knob screen control system for home appliances to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A knob screen control system for home appliances, the system includes: an MCU main control module, an encoder, a touch control module, an LED driving module, a function area and a lamp ring circuit, and a display module. The touch control module includes a touch control chip and a color film touch control circuit, selects functions through a color screen, and transmits touch control signals to the MCU main control module. The encoder receives the pulse signals generated by the rotation of the knob, judges the rotation direction and rotation amount of the knob according to the generated pulse signals, and then adjusts the gear or value. The LED driving module controls the display of time information. The function area and the lamp ring circuit control the light display of the lamp ring area and the function area. The display module receives the control signals from the MCU main control module and displays time information, operation modes, and corresponding gears and values.

[0005] Further, the MCU main control module includes an LQFP48 chip, high-frequency main crystal oscillator peripheral components A, and low-frequency crystal oscillator peripheral components B; the OSC IN pin of the LQFP48 chip is connected to the first end of the OSC OUT pin of the high-frequency main crystal oscillator peripheral components A, the second end of the OSC OUT pin of the high-frequency main crystal oscillator peripheral components A is connected to the third end of the high-frequency main crystal oscillator peripheral components A, the OSC32 IN pin of the LQFP48 chip is connected to the first end of the OSC32 OUT pin of the low-frequency crystal oscillator peripheral components B, and the second end of the OSC32 OUT pin of the low-frequency crystal oscillator peripheral components B is connected to the second end of the low-frequency crystal oscillator. The main clock signal is obtained by connecting the high-frequency main crystal oscillator peripheral components A, and the clock timing in the low-power mode is achieved by connecting the low-frequency crystal oscillator peripheral components B.

[0006] Further, the encoder includes a CN5 connector, D7 diode, D8 diode, resistors R5 to R8, decoupling capacitors C8, C9, Sign_A and Sign_B signals. The first ends of resistor R7 and resistor R8 are connected to the power supply VCC to pull up the level, ensuring that the signal line remains at a high-level state when there is no input, preventing signal drift. The second end of resistor R5 is connected to the Sign_B signal, and the first end of resistor R5 is connected to pin 1 of the GN5 connector. The second end of resistor R6 is connected to the Sign_A signal, and the first end of resistor R6 is connected to pin 2 of the GN5 connector to control the signal line current and limit noise. The first end of decoupling capacitor C8 is connected to the second end of resistor R9, and the second end of decoupling capacitor C8 is connected to GND. The first end of decoupling capacitor C9 is connected to the second end of resistor R7, and the second end of decoupling capacitor C9 is connected to GND to filter out high-frequency noise on the signal line. The Sign_A and Sign_B signals respectively correspond to the A-phase and B-phase signals of the knob. When the user rotates the knob, the encoder internally receives the A-phase and B-phase pulse signals to determine the rotation direction and rotation amount of the knob, and then adjusts the gear or value.

[0007] Further, the touch control module includes a U3 touch control chip and a color film touch control circuit; the color film touch control circuit includes C17 - C24 capacitor elements, a CN2 connector, resistors R8 to R12, resistor R50, and D1 - D6 light-emitting diodes. The first ends of the C17 - C24 capacitor elements are connected to the pins of the CN2 connector, and the first ends of the C17 - C24 capacitor elements are connected to GND. The first ends of the D1 - D6 light-emitting diodes are connected, and the first ends of the C17 - C24 capacitor elements are respectively connected to the contact pins TK1 - TK6 of the U3 touch control chip through resistors R8, R9, R10, R11, R12, and resistor R50.

[0008] Further, the LED driving module includes an LED driver U2 and an LED matrix. The LED driver U2 includes SEG1 - SEG10 segment pins, GRID1 - GRID8 grid pins, a DIN pin, and an SCLK pin. The SEG1 - SEG10 segment pins control the digits of the digital tube, and the GRID1 - GRID8 grid pins control the digit positions of the digital tube. The SCLK pin is connected to the first end of a resistor R5, and the second end of the resistor R5 is connected to the SCL pin. The DIN pin is connected to the first end of a resistor R4, and the second end of the resistor R4 is connected to the DIN pin. The LED matrix display consists of LEDs. The first end and the second end of each LED are respectively connected to the SEG1 - SEG10 segment pins and the GRID1 - GRID8 grid pins of the LED driver U2. The LED driver U2 selectively lights specific LEDs by sequentially scanning the GRID1 - GRID8 grid pins and synchronously controlling the SEG1 - SEG10 segment pins. By combining the control of the high and low levels of the segment pins and the grid pins, the LED driver U2 can display the time on the digital tube.

[0009] Further, the functional area and the lamp ring circuit include an LED parallel group and a triode group. The LED parallel group includes LED chip groups Q, W, E, F, G, and H. The LED chip group Q includes LED chips A1 to A9. The LED chip group W includes LED chips B1 to B9. The LED chip group E includes LED chips E1 to E9. The LED chip group F includes LED chips F1 to F9. The LED chip group G includes LED chips G1 to G9. The LED chip group H includes LED chips H1 to H9. The triode group includes triodes Q1, Q2, Q3, Q4, Q5, and Q6. The first end of the LED chip group Q is connected to the second ends of resistors R21 and R22 in parallel. The second end of the LED chip group Q is connected to the first end of triode Q1. The second end of triode Q1 is connected to the second end of resistor R37. The first end of resistor R37 is connected to the P2B_TIM3_CH4 pin of the LQFP48 chip. The first end of the LED chip group W is connected to the second ends of resistors R23 and R24 in parallel. The second end of the LED chip group W is connected to the first end of triode Q2. The second end of triode Q2 is connected to the second end of resistor R39. The first end of resistor R39 is connected to the P2C_TIM3_CH2 pin of the LQFP48 chip. The first end of the LED chip group E is connected to the second ends of resistors R25 and R26 in parallel. The second end of the LED chip group E is connected to the first end of triode Q3. The second end of triode Q3 is connected to the second end of resistor R41. The first end of resistor R41 is connected to the P2A_TIM3_CH3 pin of the LQFP48 chip. The first end of the LED chip group F is connected to the second ends of resistors R27 and R28 in parallel. The second end of the LED chip group F is connected to the first end of triode Q4. The second end of triode Q4 is connected to the second end of resistor R43. The first end of resistor R43 is connected to the P3B_TIM3_CH1 pin of the LQFP48 chip. The first end of the LED chip group G is connected to the second ends of resistors R29 and R30 in parallel. The second end of the LED chip group G is connected to the first end of triode Q5. The second end of triode Q5 is connected to the second end of resistor R45. The first end of resistor R45 is connected to the P3A_TIM1_CH3 pin of the LQFP48 chip. The first end of the LED chip group H is connected to the second ends of resistors R31 and R32 in parallel. The second end of the LED chip group H is connected to the first end of triode Q6. The second end of triode Q6 is connected to the second end of resistor R47. The first end of resistor R47 is connected to the P1C_TIM1_CH4 pin of the LQFP48 chip.

[0010] Further, the display module includes an eight-character area, a lamp ring area, and a function area. The eight-character area is located in the central area of the circular panel and is used to display digital information from 0 to 9. The lamp ring area surrounds the outside of the eight-character area to form an annular lamp strip. The lamp ring area includes multiple groups of LEDs, and the synchronous lighting and extinguishing or independent dimming of each group of lights are realized through a triode control circuit. The function area is located on the periphery of the circular panel and is adjacent to the lamp ring area. It contains 6 independent fan-shaped partitions. The function area is used to display different operation functions. Specifically, each fan-shaped area corresponds to an operation mode, and each fan-shaped area contains 10 indicator lights corresponding to the gears and values of the operation mode.

[0011] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0012] 1. The design combining LEDs and color films simplifies the structure of the display module. Compared with traditional LCDs or touchscreens, the LED + color film design not only occupies less space but can be flexibly arranged in various parts of the panel. This compact design makes the overall household appliance panel more concise and beautiful, avoiding redundant display areas, thus saving the external space of the device. At the same time, the reduced volume of the display module also helps to reduce material costs and manufacturing difficulties, making the device lighter and the appearance more in line with the aesthetic requirements of modern minimalist design.

[0013] 2. By integrating display and operation functions on one interface and combining the design of touch color film and encoder, the convenience and efficiency of operation are improved. The touch color film provides an intuitive operation interface, while the encoder supports precise adjustment, enabling users to easily switch functions and make detailed settings. This design optimizes the user experience, makes the operation more smooth and efficient, saves panel space, simplifies the device appearance, and the integrated design also reduces the difficulty of cleaning and maintenance. By reducing the volume and components of the display module, the production cost is reduced, and the overall economy and practicality of the device are improved.

[0014] 3. The display solution combining color film and LEDs avoids the common problems of chromaticity change and brightness attenuation in traditional liquid crystal screens. As time goes by, the liquid crystal screen will show backlight attenuation and color distortion phenomena, affecting the display effect. However, through the filtering and reflection of light, the color film achieves stable color output and is not affected by time. Description of the Drawings

[0015] Figure 1 is the structural diagram of a control system for a knob screen of a household appliance of the present utility model;

[0016] Figure 2 is the circuit schematic diagram of the main control IC of a control system for a knob screen of a household appliance of the present utility model;

[0017] Figure 3 This is the circuit schematic diagram of the encoder of a knob screen control system for household appliances according to the present utility model;

[0018] Figure 4 This is the touch control circuit schematic diagram of a knob screen control system for household appliances according to the present utility model;

[0019] Figure 5 This is the LED driving circuit schematic diagram of a knob screen control system for household appliances according to the present utility model;

[0020] Figure 6 This is the LED matrix circuit connection diagram of a knob screen control system for household appliances according to the present utility model;

[0021] Figure 7 This is the LED connection circuit diagram of the lamp ring area of a knob screen control system for household appliances according to the present utility model;

[0022] Figure 8 This is the LED connection circuit diagram of the function area of a knob screen control system for household appliances according to the present utility model;

[0023] Figure 9 This is the schematic diagram of the display function area of a knob screen control system for household appliances according to the present utility model. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] As Figures 1-9 shown, the present utility model provides a technical solution: a knob screen control system for household appliances, the system includes: an MCU main control module, an encoder, a touch control module, an LED driving module, a function area and a lamp ring circuit, and a display module. The touch control module includes a touch control chip and a color film touch control circuit, selects functions through a color screen, and transmits touch control signals to the MCU main control module. The encoder receives the pulse signals generated by the rotation of the knob, judges the rotation direction and rotation amount of the knob according to the generated pulse signals, and further adjusts the gear or value. The LED driving module controls the display of time information. The function area and the lamp ring circuit control the lighting display of the lamp ring area and the function area. The display module receives the control signals from the MCU main control module and displays time information, operation modes, and corresponding gears and values.

[0026] The MCU main control module includes an LQFP48 chip, high-frequency main crystal oscillator peripheral components A, and low-frequency crystal oscillator peripheral components B; the OSC IN pin of the LQFP48 chip is connected to the first end of the OSC OUT pin of the high-frequency main crystal oscillator peripheral component A, the second end of the OSC OUT pin of the high-frequency main crystal oscillator peripheral component A is connected to the third end of the high-frequency main crystal oscillator peripheral component A, the OSC32 IN pin of the LQFP48 chip is connected to the first end of the OSC32 OUT pin of the low-frequency crystal oscillator peripheral component B, and the second end of the OSC32 OUT pin of the low-frequency crystal oscillator peripheral component B is connected to the second end of the low-frequency crystal oscillator. The main clock signal is obtained by connecting the high-frequency main crystal oscillator peripheral component A, and the clock timing in the low-power mode is achieved by connecting the low-frequency crystal oscillator peripheral component B; the USART serial communication interface is used for the connection between the MCU main control module and the touch module.

[0027] The encoder includes a CN5 connector, D7 diode, D8 diode, resistors R5 to R8, decoupling capacitors C8, C9, Sign_A and Sign_B signals. The first ends of resistor R7 and resistor R8 are connected to the power supply VCC to pull up the level, ensuring that the signal line remains at a high-level state when there is no input, preventing signal drift. The second end of resistor R5 is connected to the Sign_B signal, and the first end of resistor R5 is connected to pin 1 of the GN5 connector. The second end of resistor R6 is connected to the Sign_A signal, and the first end of resistor R6 is connected to pin 2 of the GN5 connector to control the signal line current and limit noise; the first end of decoupling capacitor C8 is connected to the second end of resistor R9, and the second end of decoupling capacitor C8 is connected to GND. The first end of decoupling capacitor C9 is connected to the second end of resistor R7, and the second end of decoupling capacitor C9 is connected to GND to filter out high-frequency noise on the signal line; the Sign_A and Sign_B signals respectively correspond to the A-phase and B-phase signals of the knob. When the user rotates the knob, the encoder will receive the A-phase and B-phase pulse signals internally, determine the rotation direction and rotation amount of the knob, and then adjust the gear or value.

[0028] The touch module includes a U3 touch chip and a color film touch circuit; the color film touch circuit includes capacitor components C17 - C24, a CN2 connector, resistors R8 to R12, resistor R50, and D1 - D6 light-emitting diodes. Among them, the first ends of the C17 - C24 capacitor components are connected to the pins of the CN2 connector, and the first ends of the C17 - C24 capacitor components are connected to GND. The first ends of the D1 - D6 light-emitting diodes are connected, and the first ends of the C17 - C24 capacitor components are respectively connected to the contact pins TK1 - TK6 of the U3 touch chip through resistors R8, R9, R10, R11, R12, and resistor R50.

[0029] The LED driving module includes an LED driver U2 and an LED matrix. The LED driver U2 includes SEG1 - SEG10 segment pins, GRID1 - GRID8 grid pins, a DIN pin, and an SCLK pin. The SEG1 - SEG10 segment pins control the digits of the digital tube, and the GRID1 - GRID8 grid pins control the digit positions of the digital tube. The SCLK pin is connected to the first end of a resistor R5, and the second end of the resistor R5 is connected to the SCL pin. The DIN pin is connected to the first end of a resistor R4, and the second end of the resistor R4 is connected to the DIN pin. The LED matrix display consists of LEDs. The first end and the second end of each LED are respectively connected to the SEG1 - SEG10 segment pins and the GRID1 - GRID8 grid pins of the LED driver U2. The LED driver U2 selectively lights specific LEDs by sequentially scanning the GRID1 - GRID8 grid pins and synchronously controlling the SEG1 - SEG10 segment pins. By combining the control of the high and low levels of the segment pins and the grid pins, the LED driver U2 can display the time on the digital tube.

[0030] The functional area and the lamp ring circuit include an LED parallel group and a triode group. The LED parallel group includes LED chip groups Q, W, E, F, G, and H. The LED chip group Q includes LED chips A1 to A9. The LED chip group W includes LED chips B1 to B9. The LED chip group E includes LED chips E1 to E9. The LED chip group F includes LED chips F1 to F9. The LED chip group G includes LED chips G1 to G9. The LED chip group H includes LED chips H1 to H9. The triode group includes triodes Q1, Q2, Q3, Q4, Q5, and Q6. The first end of the LED chip group Q is connected to the second ends of resistors R21 and R22 in parallel. The second end of the LED chip group Q is connected to the first end of triode Q1. The second end of triode Q1 is connected to the second end of resistor R37. The first end of resistor R37 is connected to the P2B_TIM3_CH4 pin of the LQFP48 chip. The first end of the LED chip group W is connected to the second ends of resistors R23 and R24 in parallel. The second end of the LED chip group W is connected to the first end of triode Q2. The second end of triode Q2 is connected to the second end of resistor R39. The first end of resistor R39 is connected to the P2C_TIM3_CH2 pin of the LQFP48 chip. The first end of the LED chip group E is connected to the second ends of resistors R25 and R26 in parallel. The second end of the LED chip group E is connected to the first end of triode Q3. The second end of triode Q3 is connected to the second end of resistor R41. The first end of resistor R41 is connected to the P2A_TIM3_CH3 pin of the LQFP48 chip. The first end of the LED chip group F is connected to the second ends of resistors R27 and R28 in parallel. The second end of the LED chip group F is connected to the first end of triode Q4. The second end of triode Q4 is connected to the second end of resistor R43. The first end of resistor R43 is connected to the P3B_TIM3_CH1 pin of the LQFP48 chip. The first end of the LED chip group G is connected to the second ends of resistors R29 and R30 in parallel. The second end of the LED chip group G is connected to the first end of triode Q5. The second end of triode Q5 is connected to the second end of resistor R45. The first end of resistor R45 is connected to the P3A_TIM1_CH3 pin of the LQFP48 chip. The first end of the LED chip group H is connected to the second ends of resistors R31 and R32 in parallel. The second end of the LED chip group H is connected to the first end of triode Q6. The second end of triode Q6 is connected to the second end of resistor R47. The first end of resistor R47 is connected to the P1C_TIM1_CH4 pin of the LQFP48 chip.

[0031] The display module includes an eight-character area, a lamp ring area, and a function area. The eight-character area is located in the central area of the circular panel and is used to display digital information from 0 to 9. The lamp ring area surrounds the outside of the eight-character area to form a circular lamp strip. The lamp ring area includes multiple groups of LEDs, and the synchronous on / off or independent dimming of each group of lights is achieved through a triode control circuit. The function area is located on the periphery of the circular panel, adjacent to the lamp ring area, and includes 6 independent fan-shaped partitions. The function area is used to display different operation functions. Specifically, each fan-shaped area corresponds to an operation mode, and each fan-shaped area contains 10 indicator lights corresponding to the gears and values of the operation mode.

[0032] The working principle of the present utility model is as follows: First, the user selects a function through the color screen and transmits the touch signal to the MCU main control module. The MCU main control module selects the corresponding function according to the touch signal. Secondly, the encoder receives the pulse signal generated by the rotation of the knob, and judges the rotation direction and rotation amount of the knob according to the generated pulse signal, and then adjusts the gear or value. The encoder adjustment gear and value information and the function selection signal of the touch module are transmitted to the MCU main control module together. The MCU main control module updates the display content according to this information. Then, the LED driving module adjusts the on / off state of the LEDs by scanning the LED matrix one by one. Then, the MCU main control module generates a control signal and transmits it to the function area and the lamp ring circuit. According to the system state and user operations, the lighting effect is adjusted to provide visual feedback or indication. Finally, the display module receives the control signal of the MCU main control module and displays the time information, lighting effect, operation mode, and corresponding gears and values through the eight-character area, the lamp ring area, and the function area.

[0033] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A home appliance knob screen control system, characterized by: It includes an MCU main control module, an encoder, a touch module, an LED driver module, a functional area and light ring circuit, and a display module. The touch module includes a touch chip and a color film touch circuit. Function selection is performed through the color screen, and the touch signal is transmitted to the MCU main control module. The encoder receives the pulse signal generated by the rotation of the knob, and determines the rotation direction and rotation amount of the knob based on the generated pulse signal, and then adjusts the gear or value. The LED driver module controls the display of time information. The functional area and light ring circuit control the light display of the light ring area and the functional area. The display module receives the control signal from the MCU main control module and displays time information, operation mode, and corresponding gear and value.

2. The home appliance knob screen control system according to claim 1, characterized in that: The MCU main control module includes an LQFP48 chip, a high-frequency main crystal oscillator peripheral component A and a low-frequency crystal oscillator peripheral component B; the OSC IN pin of the LQFP48 chip is connected to the first end of the OSC OUT pin of the high-frequency main crystal oscillator peripheral component A, the second end of the OSC OUT pin of the high-frequency main crystal oscillator peripheral component A is connected to the third end of the high-frequency main crystal oscillator peripheral component A, the OSC32 IN pin of the LQFP48 chip is connected to the first end of the OSC32 OUT pin of the low-frequency crystal oscillator peripheral component B, and the second end of the OSC32OUT pin of the low-frequency crystal oscillator peripheral component B is connected to the second end of the low-frequency crystal oscillator.

3. The home appliance knob screen control system according to claim 1, characterized in that: The encoder includes a CN5 connector, a D7 diode, a D8 diode, resistors R5 to R8, a decoupling capacitor C8, a decoupling capacitor C9, Sign_A and Sign_B signals. The first end of the resistor R7 and the first end of the resistor R8 are connected to the power supply VCC, the second end of the resistor R5 is connected to the Sign_B signal, the first end of the resistor R5 is connected to pin 1 of the GN5 connector, the second end of the resistor R6 is connected to the Sign_A signal, and the first end of the resistor R6 is connected to pin 2 of the GN5 connector; the first end of the decoupling capacitor C8 is connected to the second end of the resistor R9, the second end of the decoupling capacitor C8 is connected to GND grounding, the first end of the decoupling capacitor C9 is connected to the second end of the resistor R7, and the second end of the decoupling capacitor C9 is connected to GND grounding; the Sign_A and Sign_B signals correspond to the A-phase and B-phase signals of the knob respectively.

4. The home appliance knob screen control system according to claim 1, characterized in that: The touch module includes a U3 touch chip and a color film touch circuit; the color film touch circuit includes C17-C24 capacitor elements, a CN2 connector, resistors R8 to R12, a resistor R50 and D1-D6 light-emitting diodes, wherein the first ends of the C17-C24 capacitor elements are connected to the pins of the CN2 connector, the first ends of the C17-C24 capacitor elements are grounded and connected to GND, the first ends of the D1-D6 light-emitting diodes are connected to, and the first ends of the C17-C24 capacitor elements are respectively connected to the first ends of the resistors R8 to R12 and the resistor R50, and are respectively connected to the contact pins TK1-TK6 of the U3 touch chip.

5. The home appliance knob screen control system according to claim 1, characterized in that: The LED driver module includes an LED driver U2 and an LED matrix. The LED driver U2 includes SEG1-SEG10 segment pins, GRID1-GRID8 gate pins, a DIN pin and an SCLK pin. The SCLK pin is connected to the first end of the resistor R5, the second end of the resistor R5 is connected to the SCL pin, the DIN pin is connected to the first end of the resistor R4, and the second end of the resistor R4 is connected to the DIN pin; the LED matrix display is composed of LEDs, and the first end and the second end of each LED are respectively connected to the SEG1-SEG10 segment pins and GRID1-GRID8 gate pins of the LED driver U2. The LED driver U2 scans the GRID1-GRID8 gate pins one by one and synchronously controls the SEG1-SEG10 segment pins.

6. The home appliance knob screen control system according to claim 2, characterized in that: The functional area and the light ring circuit include an LED parallel group and a triode group, the LED parallel group includes an LED wick group Q, an LED wick group W, an LED wick group E, an LED wick group F, an LED wick group G and an LED wick group H, the LED wick group Q includes LED wicks A1 to A9, the LED wick group W includes LED wicks B1 to B9, the LED wick group E includes LED wicks E1 to E9, the LED wick group F includes LED wicks F1 to F9, the LED wick group G includes LED wicks G1 to G9, and the LED wick group H includes LED wicks H1 to H9. Core H9, the transistor group includes transistor Q1, transistor Q2, transistor Q3, transistor Q4, transistor Q5 and transistor Q6, the first end of the LED wick group Q is connected to the resistor R21 and the resistor R22 in parallel, the second end of the LED wick group Q is connected to the first end of the transistor Q1, the second end of the transistor Q1 is connected to the second end of the resistor R37, the first end of the resistor R37 is connected to the P2B_TIM3_CH4 pin of the LQFP48 chip, the first end of the LED wick group W is connected to the resistor R23 and the resistor R24 in parallel, the second end of the LED wick group W is connected to the first end of the transistor Q2, the second end of the transistor Q2 is connected to the second end of the resistor R39, and the resistor R39 The first end of the LED wick group F is connected to the P2A_TIM3_CH3 pin of the LQFP48 chip. The first end of the LED wick group E is connected to the resistor R25 and the resistor R26 in parallel. The second end of the LED wick group E is connected to the first end of the transistor Q3. The second end of the transistor Q3 is connected to the second end of the resistor R41. The first end of the resistor R41 is connected to the P2A_TIM3_CH3 pin of the LQFP48 chip. The first end of the LED wick group F is connected to the resistor R27 and the resistor R28 in parallel. The second end of the LED wick group F is connected to the first end of the transistor Q4. The second end of the transistor Q4 is connected to the second end of the resistor R43. The first end of the resistor R43 is connected to the LQFP48 chip. The first end of the LED wick group G is connected to the P3B_TIM3_CH1 pin of the LQFP48 chip, the first end of the LED wick group G is connected to the resistor R29 and the resistor R30 in parallel, the second end of the LED wick group G is connected to the first end of the transistor Q5, the second end of the transistor Q5 is connected to the second end of the resistor R45, the first end of the resistor R45 is connected to the P3A_TIM1_CH3 pin of the LQFP48 chip, the first end of the LED wick group H is connected to the resistor R31 and the resistor R32 in parallel, the second end of the LED wick group H is connected to the first end of the transistor Q6, the second end of the transistor Q6 is connected to the second end of the resistor R47, and the first end of the resistor R47 is connected to the P1C_TIM1_CH4 pin of the LQFP48 chip.

7. The home appliance knob screen control system according to claim 1, characterized in that: The display module includes an eight-character area, a light ring area and a function area. The eight-character area is located in the central area of the circular panel and is used to display digital information 0-9; the light ring area surrounds the outside of the eight-character area to form a ring-shaped light strip. The light ring area includes multiple groups of LEDs, and the transistor control circuit realizes the synchronous lighting or independent dimming of each group of lights; the function area is located on the periphery of the circular panel, adjacent to the light ring area, and contains 6 independent sector-shaped partitions. The function area is used to display different operating functions. Specifically, each sector-shaped area corresponds to an operating mode, and each sector area contains 10 indicator lights corresponding to the gear and value of the operating mode.

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