Screen display control circuit and air conditioner

Abstract

The application provides a screen display control circuit and an air conditioner, and relates to the technical field of screen display control.The screen display control circuit comprises a first driving module, a light source assembly and a screen display control module, the input end of the first driving module is also used for receiving a light control signal, the output end of the first driving module is electrically connected with the light source assembly, and the screen display control module is also used for receiving a code sending signal with a time of T, wherein the screen display control module is used for acquiring a current light environment, the light environment comprises a light environment and a dark environment;when being in the light environment, the screen display control module is turned off, and the first driving module is used for controlling the lighting or extinguishing of the light source assembly according to the light control signal;when being in the dark environment, the screen display control module is used for being turned on when no code sending signal is received and being turned off when the code sending signal is received, and when the screen display control module is turned on, the light source assembly is extinguished.The application has the advantage that the specific light source assembly can be automatically extinguished in a lightless environment.

Description

Technical Field

[0001] This application relates to the field of display control technology, and more specifically, to a display control circuit and an air conditioner. Background Technology

[0002] In order to ensure that users can accurately control the air conditioner during use, a display screen is usually installed on the air conditioner. This display screen can show information such as the air conditioner temperature set by the user.

[0003] Currently, air conditioner displays cannot turn off automatically; they must be set by the remote control. After the display is turned off, it must be turned back on using the remote control to display again. Furthermore, most existing air conditioner remote controls lack backlighting. In dark environments, if the display is not turned off, its brightness can affect the user's sleep. If the display is turned off, the user cannot confirm the status of their remote control in dark environments, causing inconvenience.

[0004] In summary, existing screen display controls have the problem of the screen display not being able to turn off automatically. Utility Model Content

[0005] The purpose of this application is to provide a screen display control circuit and an air conditioner to solve the problem that the screen display cannot be automatically turned off in the prior art.

[0006] To address the aforementioned problems, this application provides a display control circuit, comprising a first driving module, a light source assembly, and a display control module. The input terminal of the first driving module is electrically connected to the display control module, and the input terminal of the first driving module is also used to receive a light control signal. The output terminal of the first driving module is electrically connected to the light source assembly. The display control module is further used to receive a code transmission signal with a time interval of T.

[0007] The display control module is used to obtain the current lighting environment, which includes a light environment and a dark environment.

[0008] When in a light environment, the screen display control module is disconnected, and the first drive module is used to control the light source component to turn on or off according to the light control signal;

[0009] When in a dark environment, the display control module is turned on when no code signal is received and turned off when the code signal is received. When the display control module is turned on, the light source component is turned off.

[0010] Because the provided display control circuit includes an additional display control module, which is disconnected in a bright environment without affecting the normal operation of the light source component, and in a dark environment, if no code signal is received, the display control module is turned on, and the light source component automatically turns off; if a code signal is received, the light source component is turned on. Furthermore, since the code signal transmission time is T, after the light source component is lit for a time T following the receipt of the code signal, the display control module will be turned on again, thus allowing the light source component to automatically turn off.

[0011] Optionally, the display control module includes a light intensity detection unit, a voltage regulator, and a first switching unit. The voltage regulator is electrically connected to both the light intensity detection unit and the first switching unit. The first switching unit is electrically connected to the input terminal of the first driving module. The control terminal of the first switching unit is used to receive the code transmission signal.

[0012] When in a light environment, the voltage output by the light intensity detection unit to the voltage regulator is less than its on-state voltage;

[0013] When in a dark environment, the voltage output by the light intensity detection unit to the voltage regulator is greater than its turn-on voltage.

[0014] Optionally, the light intensity detection unit includes a first resistor and a photoresistor. One end of the first resistor and the photoresistor are connected in series to a power supply, and the other end is grounded. The gate of the voltage regulator is connected between the first resistor and the photoresistor. The anode of the voltage regulator is grounded, and the cathode of the voltage regulator is electrically connected to the first switching unit.

[0015] Optionally, the first switching unit includes a second resistor and a first N-type transistor. One end of the second resistor is electrically connected to the control terminal of the first N-type transistor, and the other end of the second resistor is used to receive a code transmission signal. The first terminal of the first N-type transistor is electrically connected to the voltage regulator, and the second terminal of the first N-type transistor is electrically connected to the input terminal of the first driving module. The code transmission signal is a low-level signal with a time of T.

[0016] Optionally, the first driving module includes a second switching unit and a switch driving unit. The second switching unit is connected to the power supply and the light source assembly respectively, and the second switching unit is also electrically connected to the switch driving unit. The input terminal of the switch driving unit is electrically connected to the display control module and is used to receive the illumination control signal; wherein,

[0017] When the switch driving unit is turned on, the second switch unit is turned on to supply power to the light source assembly through the power supply;

[0018] When the switch driving unit is turned off, the second switch unit is also turned off to disconnect the power supply from the light source assembly.

[0019] Optionally, the switch driving unit includes a third resistor, a fourth resistor, and a second N-type transistor. One end of the third resistor serves as the input terminal of the first driving module, and the other end of the third resistor is electrically connected to the control terminal of the second N-type transistor and one end of the fourth resistor. The other end of the fourth resistor is grounded to the first terminal of the second N-type transistor, and the second terminal of the second N-type transistor is electrically connected to the switch driving unit.

[0020] Optionally, the second switching unit includes a fifth resistor, a sixth resistor, and a P-type transistor. One end of the fifth resistor is electrically connected to the switch driving unit, and the other end of the fifth resistor is electrically connected to the control terminal of the P-type transistor and one end of the sixth resistor. The other end of the sixth resistor and the first end of the P-type transistor are both connected to the power supply, and the second end of the P-type transistor is electrically connected to the light source assembly.

[0021] Optionally, the light source assembly includes multiple light-emitting diodes (LEDs) connected in parallel, and the display control circuit further includes a second driving module. The second driving module is electrically connected to the cathode of each LED, and the anode of each LED is electrically connected to the first driving module.

[0022] The second driving module is used to receive the lighting selection signal and drive the corresponding target light-emitting diode to light up according to the lighting selection signal.

[0023] Optionally, the second driving module includes a driving chip and a number of seventh resistors equal to the number of light-emitting diodes. One end of each seventh resistor is electrically connected to the cathode of one of the light-emitting diodes, and the other end of each seventh resistor is electrically connected to the driving chip. The ground terminal of the driving chip is grounded, and the driving chip is used to receive a lighting selection signal.

[0024] On the other hand, this application embodiment also provides an air conditioner, which includes a controller and the above-mentioned display control circuit, and the controller and the display control circuit are electrically connected. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the display control circuit provided in an embodiment of this application.

[0026] Figure 2 This is a circuit diagram of the display control module provided in an embodiment of this application.

[0027] Figure 3 A circuit diagram of the first driving module provided in an embodiment of this application.

[0028] Figure 4 This is a circuit diagram of the light source assembly and the second driving module provided in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100 - Display control circuit; 110 - First drive module; 111 - Switch drive unit; 112 - Second switch unit; 120 - Light source assembly; 130 - Display control module; 140 - Second drive module; Rx - Photoresistor; R1 - First resistor; R2 - Second resistor; R3 - Third resistor; R4 - Fourth resistor; R5 - Fifth resistor; R6 - Sixth resistor; R7 - Seventh resistor; Q1 - First N-type transistor; Q2 - Second N-type transistor; Q3 - P-type transistor; U1 - Voltage regulator; IC1 - Driver chip. Detailed Implementation

[0031] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0032] As described in the background section, currently, air conditioner displays require a remote control for users to turn them off. For example, in one scenario, a user adjusts the air conditioner's cooling setting to 25°C; the display will then show "25". However, in dark environments, such as at night, the screen brightness can affect the user's sleep. Therefore, the user needs to manually turn off the display using the remote control. For instance, if the remote control has a "sleep mode" button, pressing it will turn off the display.

[0033] However, even after the display is turned off, it remains off when the user needs to adjust the air conditioner temperature again, causing inconvenience. For example, if a user needs to adjust the temperature from 25°C to 22°C, because the display is off, the user cannot confirm whether the temperature setting has been successfully adjusted after pressing the temperature control button on the remote control. Therefore, each time the user adjusts the temperature, they need to first turn off the "sleep mode" to display the temperature on the air conditioner's screen, then adjust the temperature using the remote control, and finally press the "sleep mode" button again. This overall operation is inconvenient for users, resulting in a poor user experience.

[0034] In view of this, in order to improve the above problems, this application provides a screen display control circuit to achieve the effect of automatically turning off the air conditioner screen display in dark environments.

[0035] The following is an exemplary description of the screen display control circuit provided in this application:

[0036] As an optional implementation, please refer to Figure 1 The display control circuit 100 includes a first driving module 110, a light source component 120, and a display control module 130. The input terminal of the first driving module 110 is electrically connected to the display control module 130, and the input terminal of the first driving module 110 is also used to receive a light control signal. The output terminal of the first driving module is electrically connected to the light source component 120. The display control module 130 is also used to receive a code transmission signal with a time of T. The display control module 130 is used to obtain the current lighting environment, which includes a light environment and a dark environment. When in a light environment, the display control module 130 is disconnected, and the first driving module 110 is used to control the light source component 120 to turn on or off according to the light control signal. When in a dark environment, the display control module 130 is used to turn on when no code transmission signal is received and turn off when a code transmission signal is received. When the display control module 130 is turned on, the light source component 120 is turned off.

[0037] It should be noted that the light environment and dark environment mentioned in this application refer to the light intensity of the environment in which the air conditioner is located during the use of the air conditioner. When the light intensity is greater than a threshold, the environment in which the air conditioner is located is a light environment, such as when there is sufficient light during the day; while when the light intensity is less than a threshold, the environment in which the air conditioner is located is a dark environment, such as when there is dim light at night.

[0038] Understandably, on the one hand, since the display control module 130 is disconnected in a bright environment, it does not affect the normal operation of the light source component 120. However, in a dark environment, if no code signal is received, the display control module 130 is turned on, and the light source component 120 automatically turns off; if a code signal is received, the light source component 120 is lit. Furthermore, since the code signal transmission time is T, after the light source component 120 is lit for a time T after receiving the code signal, the display control module 130 will be turned on again, thus allowing the light source component 120 to automatically turn off.

[0039] As one implementation method, please refer to Figure 2 The display control module 130 includes a light intensity detection unit, a voltage regulator U1, and a first switching unit. The voltage regulator U1 is electrically connected to the light intensity detection unit and the first switching unit, respectively. The first switching unit is electrically connected to the input terminal of the first driving module 110. The control terminal of the first switching unit is used to receive the code transmission signal. When in a light environment, the voltage output by the light intensity detection unit to the voltage regulator U1 is less than its turn-on voltage. When in a dark environment, the voltage output by the light intensity detection unit to the voltage regulator U1 is greater than its turn-on voltage.

[0040] The light intensity detection unit includes a first resistor R1 and a photoresistor Rx. One end of the first resistor R1 and the photoresistor Rx connected in series is connected to the power supply, and the other end is grounded. The gate of the voltage regulator U1 is connected between the first resistor R1 and the photoresistor Rx. The anode of the voltage regulator U1 is grounded, and the cathode of the voltage regulator U1 is electrically connected to the first switching unit.

[0041] For example, the voltage regulator U1 provided in this application is an LM431 regulator with a gate turn-on voltage of 2.5V. That is, when the gate voltage is greater than 2.5V, the voltage regulator U1 is turned on; when the gate voltage is less than 2.5V, the voltage regulator U1 is turned off. Based on this, by setting a voltage divider circuit composed of a first resistor R1 and a photoresistor Rx, the gate voltage of the voltage regulator U1 can be changed according to the current ambient light intensity.

[0042] Specifically, a photoresistor Rx is a resistor whose resistance changes with the ambient light intensity. For example, the stronger the ambient light, the higher the resistance of the photoresistor Rx; the weaker the ambient light, the lower the resistance. Furthermore, the maximum resistance of the photoresistor Rx is defined as the photoresistance value, and the minimum resistance is defined as the dark resistance value.

[0043] For example, the first resistor R1 is selected with a resistance of 50K ohms. The resistance of the photoresistor Rx varies depending on the selection. For instance, in the selected photoresistor Rx, the photoresistance is 4K ohms and the dark resistance is 200K ohms. If a 5V power supply is used, according to the voltage divider principle, the gate voltage of the regulator U1 can reach a minimum of 0.37V in a light environment and a maximum of 3.75V in a dark environment. Furthermore, the regulator U1 compares its gate voltage with its reference voltage (i.e., the turn-on voltage) to control the regulator U1 to turn on or off.

[0044] Based on this, it can be understood that the light environment and dark environment described in this application can be divided based on a reference voltage of 2.5V. When the gate voltage of the regulator U1 is less than 2.5V, the current environment is a light environment, and the cathode and anode terminals of the regulator U1 are not conducting. When the gate voltage of the regulator U1 is greater than 2.5V, the current environment is a dark environment, and the cathode and anode terminals of the regulator U1 are conducting.

[0045] In one implementation, the first switching unit includes a second resistor R2 and a first N-type transistor Q1. One end of the second resistor R2 is electrically connected to the control terminal of the first N-type transistor Q1, and the other end of the second resistor R2 is used to receive the code transmission signal. The first terminal of the first N-type transistor Q1 is electrically connected to the voltage regulator U1, and the second terminal of the first N-type transistor Q1 is electrically connected to the input terminal of the first driving module 110. The code transmission signal is a low-level signal with a time of T.

[0046] The N-type transistor described in this application can be an N-type bipolar transistor or an N-type MOSFET, and is not limited thereto. Taking an N-type bipolar transistor as an example, the emitter of the first N-type transistor Q1 is electrically connected to the cathode of the voltage regulator U1, the collector of the first N-type transistor Q1 is electrically connected to the input terminal of the first driving module 110, and the base of the first N-type transistor Q1 is used to receive the code signal.

[0047] It should be noted that the coding signal described in this application is a signal generated by the air conditioner controller (not shown) based on the user's remote control operation. When the user does not press the remote control, the controller pulls the base voltage high, keeping the first N-type transistor Q1 in a conducting state; when the user presses the remote control, the controller generates a low-level signal for a duration of T, thereby turning off the first N-type transistor Q1. After time T, the low-level signal disappears, and the controller pulls the base voltage of the first N-type transistor Q1 high again. For example, if time T is set to 5 seconds, when the user presses a button (such as adjusting the temperature from 25° to 22°), the controller, upon receiving the remote control command, will generate a coding signal, which is a low-level signal for 5 seconds. At this time, the coding signal pulls the base voltage of the first N-type transistor Q1 low, turning off the N-type transistor for 5 seconds. After 5 seconds, the coding signal disappears, and the controller pulls the base voltage of the first N-type transistor Q1 high again, turning on the first N-type transistor Q1.

[0048] It should also be noted that when the display control module 130 is turned on, it means that both the voltage regulator U1 and the N-type transistor are turned on; when the display control module 130 is turned off, it means that either the voltage regulator U1 or the N-type transistor is turned off, or both the voltage regulator U1 and the N-type transistor are turned off.

[0049] Based on this, in a well-lit environment, since the gate voltage is less than 2.5V, the regulator U1 is always off. Therefore, regardless of whether a code signal is received, the entire display control module 130 remains off, thus not affecting the light source component 120. However, in a dark environment, since the gate voltage is greater than 2.5V, the regulator U1 is always on. If a code signal is received, the N-type transistor turns off, and the entire display control module 130 shuts down, not affecting the illumination of the light source component 120. If no code signal is received, the base voltage of the first N-type transistor Q1 is pulled high, and Q1 conducts. This puts the entire display control module 130 on, pulling the voltage at the input of the first drive module 110 down to ground.

[0050] As one implementation method, please refer to Figure 3The first driving module 110 includes a second switching unit 112 and a switch driving unit 111. The second switching unit 112 is connected to the power supply and the light source assembly 120 respectively, and the second switching unit 112 is also electrically connected to the switch driving unit 111. The input terminal of the switch driving unit 111 is electrically connected to the screen display control module 130 and is used to receive illumination control signals. When the switch driving unit 111 is turned on, the second switching unit 112 is turned on to supply power to the light source assembly 120 through the power supply. When the switch driving unit 111 is turned off, the second switching unit 112 is turned off to disconnect the connection between the power supply and the light source assembly 120.

[0051] For example, the switch driving unit 111 includes a third resistor R3, a fourth resistor R4, and a second N-type transistor Q2. One end of the third resistor R3 serves as the input terminal of the first driving module 110. The other end of the third resistor R3 is electrically connected to the control terminal of the second N-type transistor Q2 and one end of the fourth resistor R4. The other end of the fourth resistor R4 is grounded to the first terminal of the second N-type transistor Q2. The second terminal of the second N-type transistor Q2 is electrically connected to the switch driving unit 111. It is understood that when the switch driving unit 111 is turned off, it refers to the condition where the second N-type transistor Q2 is turned off; when the switch driving unit 111 is turned on, it refers to the condition where the second N-type transistor Q2 is turned on.

[0052] Furthermore, the second switching unit 112 includes a fifth resistor R5, a sixth resistor R6, and a P-type transistor Q3. One end of the fifth resistor R5 is electrically connected to the switch driving unit 111, and the other end of the fifth resistor R5 is electrically connected to the control terminal of the P-type transistor Q3 and one end of the sixth resistor R6. The other end of the sixth resistor R6 and the first end of the P-type transistor Q3 are both connected to the power supply, and the second end of the P-type transistor Q3 is electrically connected to the light source assembly 120. It can be understood that when the second switching unit 112 is turned off, it refers to the P-type transistor Q3 being turned off; when the second switching unit 112 is turned on, it refers to the P-type transistor being turned on.

[0053] Based on this, when the display control module 130 is turned on, the input voltage of the first drive module 110 is pulled down to ground. At this time, the switch drive unit 111 is turned off, and the second switch unit 112 is also turned off, disconnecting the power supply to the light source component 120, and turning off the light source component 120. When the display control module 130 is turned off, the input voltage of the first drive module 110 changes with the illumination control signal. When the illumination control signal is high, the switch drive unit 111 is turned on, and the second switch unit 112 is also turned on, connecting the light source component 120 to the power supply, and lighting up the light source component 120.

[0054] In one implementation, please refer to Figure 4The light source assembly 120 includes multiple light-emitting diodes connected in parallel. The display control circuit 100 also includes a second driving module 140. The second driving module 140 is electrically connected to the cathode of each light-emitting diode, and the anode of each light-emitting diode is electrically connected to the first driving module 110. The second driving module 140 is used to receive a lighting selection signal and drive the corresponding target light-emitting diode to light up according to the lighting selection signal.

[0055] The second driving module 140 includes a driving chip IC1 and a number of seventh resistors R7 equal to the number of light-emitting diodes. One end of each seventh resistor R7 is electrically connected to the cathode of a light-emitting diode, and the other end of each seventh resistor R7 is electrically connected to the driving chip IC1. The ground terminal of the driving chip IC1 is grounded, and the driving chip IC1 is used to receive the lighting selection signal.

[0056] In this application, the first driving module 110 provides the anode driving signal for the light source assembly 120, while the second driving module 140 provides the cathode driving signal for the light source assembly 120. Furthermore, the illumination control signal is a single signal, while the lighting selection signal consists of multiple signals. Figure 4 The LEDs (LED-A to LED-G) in the diagram are arranged in a series of seven LEDs, resulting in seven lighting selection signals. The lighting control signals, lighting selection signals, and code transmission signals described in this application are all signals generated by the controller based on user remote control commands. For example, the remote control may have a "sleep mode" button and "temperature increase" and "temperature decrease" buttons. When the user presses the "sleep mode" button, the controller outputs the corresponding lighting control signal based on the remote control command. Specifically, when the user selects sleep mode, the lighting control signal is a low-level signal, and the light source component 120 cannot be lit; when the user does not select sleep mode, the lighting control signal is a high-level signal, and the light source component 120 is lit. When the user increases or decreases the temperature, the controller controls the lighting selection signals, causing some LEDs to light up and others to turn off, thereby changing the digital representation of the LEDs. Simultaneously, after the user presses the "temperature increase" or "temperature decrease" button, the controller generates a code transmission signal and outputs it to the display control module 130.

[0057] Therefore, the working principle of the display control circuit 100 provided in this application is as follows:

[0058] When in a well-lit environment, the display control module 130 is turned off. At this time, the light source component 120 is only controlled by the light control signal and the illumination selection signal. The user can choose whether to enter sleep mode. If sleep mode is selected, the light control signal is a low-level signal and the display is off; if sleep mode is not selected, the light control signal is a high-level signal, the display is on, and the currently illuminated LED is selected based on the illumination selection signal.

[0059] In a dark environment, the voltage regulator U1 is turned on. If no code signal is received, the first N-type transistor Q1 is turned on, the entire display control module 130 is turned on, the input of the first drive module 110 is pulled down to ground, and the light source component 120 is turned off. If a code signal is received, the first N-type transistor Q1 is turned off for a time T, such as 5 seconds. The input of the first drive module 110 is pulled high under the action of the light control signal, and the light source component 120 is lit. After time T, the code signal disappears, the base voltage of the first N-type transistor Q1 is pulled high again, the first N-type transistor Q1 is lit, and the light source component 120 is automatically turned off. Therefore, the display control circuit 100 provided in this application can automatically turn off in the absence of light, avoiding affecting the user's sleep. At the same time, when the user operates the remote control, the display will light up again, making it easy for the user to judge whether the operation is successful.

[0060] Based on the above implementation, this application embodiment also provides an air conditioner, which includes a controller and the above-mentioned display control circuit 100, and the controller and the display control circuit 100 are electrically connected.

[0061] In summary, this application provides a display control circuit and an air conditioner. The display control circuit includes a first driving module, a light source component, and a display control module. The input terminal of the first driving module is electrically connected to the display control module, and the input terminal of the first driving module is also used to receive a light control signal. The output terminal of the first driving module is electrically connected to the light source component. The display control module is also used to receive a code transmission signal with a time of T. The display control module is used to obtain the current lighting environment, which includes a light environment and a dark environment. When in a light environment, the display control module is disconnected, and the first driving module is used to control the light source component to turn on or off according to the light control signal. When in a dark environment, the display control module is used to turn on when no code transmission signal is received and turn off when a code transmission signal is received. When the display control module is turned on, the light source component is turned off.

[0062] Because the provided display control circuit includes an additional display control module, which is disconnected in a bright environment without affecting the normal operation of the light source component, and in a dark environment, if no code signal is received, the display control module is turned on, and the light source component automatically turns off; if a code signal is received, the light source component is turned on. Furthermore, since the code signal transmission time is T, after the light source component is lit for a time T following the receipt of the code signal, the display control module will be turned on again, thus allowing the light source component to automatically turn off.

[0063] While this application discloses the above information, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of this application; therefore, the scope of protection of this application shall be determined by the scope defined in the claims.

Claims

1. A screen display control circuit (100), characterized in that, The display control circuit (100) includes a first driving module (110), a light source assembly (120), and a display control module (130). The input terminal of the first driving module (110) is electrically connected to the display control module (130), and the input terminal of the first driving module (110) is also used to receive a light control signal. The output terminal of the first driving module is electrically connected to the light source assembly (120). The display control module (130) is also used to receive a code transmission signal with a time of T. The screen display control module (130) is used to obtain the current lighting environment, which includes a light environment and a dark environment; When in a light environment, the screen display control module (130) is disconnected, and the first drive module (110) is used to control the light source component (120) to light up or turn off according to the light control signal; When in a dark environment, the display control module (130) is turned on when the code signal is not received and turned off when the code signal is received. When the display control module (130) is turned on, the light source component (120) is turned off.

2. The display control circuit (100) according to claim 1, characterized in that, The display control module (130) includes a light intensity detection unit, a voltage regulator (U1), and a first switching unit. The voltage regulator (U1) is electrically connected to the light intensity detection unit and the first switching unit, respectively. The first switching unit is electrically connected to the input terminal of the first driving module (110), and the control terminal of the first switching unit is used to receive the code transmission signal. When in a light environment, the voltage output by the light intensity detection unit to the voltage regulator (U1) is less than its on-state voltage; When in a dark environment, the voltage output by the light intensity detection unit to the voltage regulator (U1) is greater than its on-state voltage.

3. The display control circuit (100) according to claim 2, characterized in that, The light intensity detection unit includes a first resistor (R1) and a photoresistor (Rx). One end of the first resistor (R1) and the photoresistor (Rx) connected in series is connected to a power supply, and the other end is grounded. The gate of the voltage regulator (U1) is connected between the first resistor (R1) and the photoresistor (Rx). The anode of the voltage regulator (U1) is grounded, and the cathode of the voltage regulator (U1) is electrically connected to the first switching unit.

4. The display control circuit (100) according to claim 2, characterized in that, The first switching unit includes a second resistor (R2) and a first N-type transistor (Q1). One end of the second resistor (R2) is electrically connected to the control terminal of the first N-type transistor (Q1), and the other end of the second resistor (R2) is used to receive a code transmission signal. The first terminal of the first N-type transistor (Q1) is electrically connected to the voltage regulator (U1), and the second terminal of the first N-type transistor (Q1) is electrically connected to the input terminal of the first driving module (110). The code transmission signal is a low-level signal with a time of T.

5. The display control circuit (100) according to claim 1, characterized in that, The first driving module (110) includes a second switching unit (112) and a switch driving unit (111). The second switching unit (112) is connected to the power supply and the light source assembly (120) respectively, and the second switching unit (112) is also electrically connected to the switch driving unit (111). The input terminal of the switch driving unit (111) is electrically connected to the screen display control module (130) and is used to receive the illumination control signal; wherein, When the switch driving unit (111) is turned on, the second switch unit (112) is turned on to supply power to the light source assembly (120) through the power supply; When the switch driving unit (111) is turned off, the second switch unit (112) is turned off to disconnect the power supply from the light source assembly (120).

6. The display control circuit (100) according to claim 5, characterized in that, The switch driving unit (111) includes a third resistor (R3), a fourth resistor (R4), and a second N-type transistor (Q2). One end of the third resistor (R3) serves as the input terminal of the first driving module (110). The other end of the third resistor (R3) is electrically connected to the control terminal of the second N-type transistor (Q2) and one end of the fourth resistor (R4). The other end of the fourth resistor (R4) is grounded to the first terminal of the second N-type transistor (Q2). The second terminal of the second N-type transistor (Q2) is electrically connected to the switch driving unit (111).

7. The display control circuit (100) according to claim 5, characterized in that, The second switching unit (112) includes a fifth resistor (R5), a sixth resistor (R6), and a P-type transistor (Q3). One end of the fifth resistor (R5) is electrically connected to the switch driving unit (111), and the other end of the fifth resistor (R5) is electrically connected to the control terminal of the P-type transistor (Q3) and one end of the sixth resistor (R6). The other end of the sixth resistor (R6) and the first end of the P-type transistor (Q3) are both connected to the power supply, and the second end of the P-type transistor (Q3) is electrically connected to the light source assembly (120).

8. The display control circuit (100) according to claim 1, characterized in that, The light source assembly (120) includes a plurality of light-emitting diodes connected in parallel. The display control circuit (100) further includes a second driving module (140). The second driving module (140) is electrically connected to the cathode of each light-emitting diode, and the anode of each light-emitting diode is electrically connected to the first driving module (110). The second driving module (140) is used to receive the lighting selection signal and drive the corresponding target light-emitting diode to light up according to the lighting selection signal.

9. The display control circuit (100) according to claim 8, characterized in that, The second driving module (140) includes a driving chip (IC1) and a number of seventh resistors (R7) equal to the number of light-emitting diodes. One end of each seventh resistor (R7) is electrically connected to the cathode of one of the light-emitting diodes, and the other end of each seventh resistor (R7) is electrically connected to the driving chip (IC1). The ground terminal of the driving chip (IC1) is grounded, and the driving chip (IC1) is used to receive a lighting selection signal.

10. An air conditioner, characterized in that, The air conditioner includes a controller and a display control circuit (100) as described in any one of claims 1 to 9, wherein the controller is electrically connected to the display control circuit (100).

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