LCD display screen control system of automobile air conditioner control panel

Abstract

The utility model relates to a liquid crystal display (LCD) screen control system of an automobile air conditioner control panel, which comprises an automobile body control module (BCM), a liquid crystal display (LCD) screen and a liquid crystal display (LCD) screen, the color segment type display screen can be used for displaying real-time state information of the air conditioner; the encoder can bear external pressing and send out first encoding information for switching the blowing mode of the air conditioner, or bear external rotation and send out second encoding information for controlling the temperature of the air conditioner; the main control MCU is used for receiving the specific encoding information sent by the encoder and is in communication connection with the BCM through a CAN bus so as to control the temperature and the blowing mode of the air conditioner; and the temperature and the blowing mode of the current air conditioner are displayed on the color section type display screen under control. The color section type display screen is carried, the appearance is exquisite, operation is convenient, and functions are rich.

Description

Technical Field

[0001] The utility model relates to the technical field of LCD display screen control, in particular to an LCD display screen control system for an automobile air-conditioning control panel. Background Art

[0002] In modern automotive design, the convenience and safety of in-car air conditioning systems have become key elements of the user experience. Traditional in-car air conditioning panels are controlled via encoders. Their intuitive operation and rapid response significantly enhance operational convenience while driving, and they also support blind operation, effectively ensuring driver and passenger safety. However, with increasing competition in the automotive market and evolving consumer demands, relying solely on simple encoders for air conditioning control is no longer sufficient to meet the market's demand for interior aesthetics and brand differentiation.

[0003] While encoder control technology is widely adopted by most OEMs in the current market, the accompanying display interfaces are often limited to monotonous colors and visual effects, lacking appeal and a sense of sophistication. This makes it difficult to visually delight drivers and passengers or highlight the vehicle's premium positioning. Therefore, developing a new air conditioning control panel that integrates advanced display technology with the advantages of traditional encoder control is crucial. Utility Model Content

[0004] Purpose of the present invention: In order to overcome the defects of the prior art, the present invention provides an LCD display control system for an automobile air-conditioning control panel, which is equipped with a color segment display screen, has a delicate appearance, is easy to operate, and has rich functions.

[0005] The technical solution of the utility model is: an LCD display screen control system for an automobile air-conditioning control panel, comprising:

[0006] Body control module (BCM), which can be used to control the air conditioning in the car;

[0007] Color segment display, which can be used to display real-time status information of the air conditioner;

[0008] An encoder that can withstand external pressure and emit a first coded message for switching the air conditioner's blowing mode, or withstand external rotation and emit a second coded message for controlling the air conditioner's temperature;

[0009] The main control MCU is used to receive specific coding information from the encoder and communicate with the BCM through the CAN bus to control the temperature and blowing mode of the air conditioner; and control the display of the current temperature and blowing mode of the air conditioner on the color segment display.

[0010] By adopting the above technical solution and cleverly combining a color segment display with encoder control technology, the encoder is able to simultaneously control the air conditioning temperature and air blowing mode, and the current air conditioning temperature and mode are displayed on the color segment display. This system not only retains the convenience and safety of encoder operation, but also achieves a qualitative leap in visual quality. The color segment display, with its rich color expression, high-resolution display, and flexible interface design, can significantly enhance the visual effect of the in-vehicle air conditioning panel, creating a more luxurious and technological interior atmosphere. At the same time, this innovative design also provides automakers with extensive customization space, helping to shape unique brand characteristics, enhance product market competitiveness, and meet consumers' pursuit of a high-quality driving experience. It has a wide range of application scenarios in future high-end models.

[0011] Preferably, the color segment display uses double-sided ITO conductive film glass. Double-sided ITO conductive film glass is made by depositing silicon dioxide (SiO2) and indium tin oxide (commonly known as ITO) thin films on a soda-lime-based or borosilicate-based substrate glass using magnetron sputtering technology. This greatly enhances the display's antistatic properties. The double-sided ITO structure provides better conductivity and transparency, while also increasing product durability.

[0012] Preferably, the color segment display screen has a total of 108 segments, and 4COM×27Seg.

[0013] Preferably, the main control MCU adopts R5F10PPJLFB.

[0014] Preferably, the color segment display screen control circuit includes an LED lamp group, a high-side PWM circuit and a low-side enabling circuit, wherein the high-side PWM circuit has a triode Q42 and a MOS tube MOS2, the base of Q42 is connected to the main control MCU, and the main control MCU sends a PWM signal to control the base of Q42. When the base of Q42 is high, Q42 is turned on to pull down the gate of MOS2. At this time, MOS2 is turned on and supplies power to the corresponding LED; when the base of Q42 is low, MOS2 is turned off to turn off the power supply to the LED; wherein the low-side enabling circuit has a low-side MOS tube MOS3, the gate of MOS3 is connected to the main control MCU, and the main control MCU controls the gate of MOS3. When the gate of MOS3 is high, the MOS tube is turned on and completes the current path of the corresponding LED, thereby lighting the LED; when the gate of MOS3 is low, the MOS tube is turned off to disconnect the current path of the LED, and the LED is turned off. The main control MCU controls the base of Q42 to change high and low, thereby completing the brightness control of the corresponding LED; and when the gate of MOS3 is controlled by the main control MCU to be high, the corresponding LED is turned on and enabled.

[0015] Preferably, the encoder control circuit includes an optocoupler control circuit and a key control circuit connected to the main control MCU. The optocoupler control circuit is turned on and off by rotating the encoder, while the key control circuit is turned on and off by pressing the encoder. When the encoder is rotated, the output is achieved through the optocoupler control circuit; when the encoder is pressed, the output is achieved through the key control circuit, thereby transmitting specific coded information to the main control MCU. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A circuit diagram of a control system according to a specific embodiment of the present invention;

[0017] Figure 2 This is a color segment display screen control circuit diagram in a specific embodiment of the utility model;

[0018] Figure 3 The encoder control circuit in the specific embodiment of the present utility model;

[0019] Figure 4 for Figure 3 Optocoupler control circuit diagram;

[0020] Figure 5 for Figure 3 Middle button control circuit diagram. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in this embodiment with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] like Figure 1-5 As shown, the present invention is an LCD display screen control system for an automobile air conditioning control panel, comprising:

[0023] Body control module (BCM), which can be used to control the air conditioning in the car;

[0024] The color segment display can be used to display the real-time status information of the air conditioner (specifically the temperature and the blowing mode). The color segment display adopts double-sided ITO conductive film glass. The color segment display has a total of 108 segments and 4COM×27Seg. The color segment display also has an LCD driver chip BU91600FUV-ME2. Specifically, the color segment display control circuit includes an LED light group, a high-side PWM circuit and a low-side enable circuit. The high-side PWM circuit has a transistor Q42 and a MOS tube MOS2. The base of Q42 is connected to the main control MCU, and the main control MCU sends a PWM signal to realize the control of Q42. The control of Q42 base, when the base of Q42 is high, Q42 is turned on to pull down the gate of MOS2, at which time MOS2 is turned on and supplies power to the corresponding LED; when the base of Q42 is low, MOS2 is turned off to stop the power supply to the LED; the low-side enabling circuit comprises a low-side MOS tube MOS3, the gate of MOS3 is connected to the main control MCU, and the main control MCU controls the gate of MOS3. When the gate of MOS3 is high, the MOS tube is turned on and completes the current path of the corresponding LED, thereby lighting the LED; when the gate of MOS3 is low, the MOS tube is turned off to disconnect the current path of the LED, and the LED is turned off.

[0025] The encoder can withstand external pressure and emit a first coded signal to switch the air conditioner's airflow mode, or a second coded signal to control the air conditioner's temperature. Specifically, the encoder control circuit includes an optocoupler control circuit and a key control circuit connected to the main control MCU. The optocoupler control circuit features an IR transmitter, two spaced IR receivers, and a current-limiting resistor. The output photocurrent signal is converted to a voltage signal via the resistor. When IR coupling is present, the IR receiver outputs a high level. The encoder's rotational direction can be determined by measuring the voltage level at the relevant port. Key presses are determined by debounced signals passing through a 0.1uF capacitor, eliminating jitter for a time width of τ / 3 = R*C / 3 = 33us. After debounce, the signal is connected to the main control MCU port via a 10K current-limiting filter resistor. When the key is not pressed, the main MCU detects the SLEEP_VDD voltage (5V). When pressed, the main MCU detects 0V. A nF ceramic capacitor, C659, is used for hardware anti-shake. The on-off of the optical coupling control circuit is realized by a rotary operation encoder, and the on-off of the key control circuit is realized by a press operation encoder.

[0026] The main control MCU receives the specific code information from the encoder and communicates with the BCM via the CAN bus to control the air conditioner's temperature and air flow mode. It also displays the current temperature and air flow mode on the color segment display. Specifically, the main control MCU uses the R5F10PPJLFB.

[0027] This control system cleverly combines the color segment display screen with the encoder control technology. The encoder has the function of controlling the air-conditioning temperature and blowing mode at the same time, and displays the current air-conditioning temperature and mode through the color segment display screen.

[0028] When the button on the encoder is pressed, the button control circuit realizes the output and sends out the first coding information for switching the air conditioner's blowing mode. The main control MCU receives the specific coding information sent by the encoder and controls the air conditioner's blowing mode through the BCM. At the same time, the main control MCU can also control the corresponding LED to light up, so that the current air conditioner's blowing mode is displayed on the color segment display;

[0029] When the encoder is rotated, the output is realized through the optocoupler control circuit, which sends out the second coded information to control the air conditioner temperature. The main control MCU receives the specific coded information sent by the encoder and controls the temperature of the air conditioner through the BCM. At the same time, the main control MCU also controls the corresponding LED to light up, so that the current temperature of the air conditioner is displayed on the color segment display.

Claims

1. An LCD display screen control system for an automobile air conditioning control panel, characterized in that: include: Body control module (BCM), which can be used to control the air conditioning in the car; Color segment display, which can be used to display real-time status information of the air conditioner; An encoder that can withstand external pressure and emit a first coded message for switching the air conditioner's blowing mode, or withstand external rotation and emit a second coded message for controlling the air conditioner's temperature; The main control MCU is used to receive specific coding information from the encoder and communicate with the BCM through the CAN bus to control the temperature and blowing mode of the air conditioner; and control the display of the current temperature and blowing mode of the air conditioner on the color segment display.

2. The LCD display screen control system for an automobile air conditioning control panel according to claim 1, characterized in that: The color segment display uses double-sided ITO conductive film glass.

3. The LCD display screen control system for an automobile air conditioning control panel according to claim 1, characterized in that: The color segment display has a total of 108 segments, and 4COM×27Seg.

4. The LCD display screen control system for an automobile air conditioning control panel according to claim 1, characterized in that: The main control MCU uses R5F10PPJLFB.

5. The LCD display screen control system for an automobile air conditioning control panel according to any one of claims 1 to 4, characterized in that: The color segment display control circuit includes LED light group, high-side PWM circuit and low-side enable circuit. The high-side PWM circuit includes a transistor Q42 and a MOS transistor MOS2. The base of Q42 is connected to the main control MCU, and the main control MCU sends a PWM signal to control the base of Q42. When the base of Q42 is high, Q42 is turned on and the gate of MOS2 is pulled low. At this time, MOS2 is turned on and supplies power to the corresponding LED; when the base of Q42 is low, MOS2 is turned off to stop the power supply to the LED. The low-side enabling circuit includes a low-side MOS transistor MOS3. The gate of MOS3 is connected to the main control MCU, which controls the gate of MOS3. When the gate of MOS3 is high, the MOS transistor is turned on and completes the current path of the corresponding LED, thereby lighting the LED; when the gate of MOS3 is low, the MOS transistor is turned off to disconnect the current path of the LED, and the LED is turned off.

6. The LCD display screen control system for an automobile air conditioning control panel according to any one of claims 1 to 4, characterized in that: The encoder control circuit includes an optocoupler control circuit and a key control circuit connected to the main control MCU. The on-off of the optocoupler control circuit is realized by a rotary operation encoder, and the on-off of the key control circuit is realized by a press operation encoder.

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