Electric vehicle instrument light regulation and control device

Abstract

The invention discloses an electric vehicle instrument light regulation and control device. The device comprises a processor, a light sensor, a backlight circuit, a display screen, a controller and an indicator light assembly. Wherein the processor is respectively connected with the light sensor, the backlight circuit, the controller and the indicator light assembly; the output end of the backlight circuit is connected with the input end of the display screen; a plurality of communication interfaces are arranged on the processor, and the processor is connected with the controller through the communication interfaces; the plurality of communication interfaces include but are not limited to at least one of an integrated service digital network communication interface, a 485 communication interface and a CAN communication interface. According to the embodiment of the invention, the plurality of communication interfaces are arranged on the processor, so that the reliability and stability of data communication in the light regulation and control device can be effectively ensured, and the light regulation and control efficiency can be effectively improved.

Description

[0001] The present application is a divisional application of the patent application entitled "Electric vehicle instrument light regulation device and method", the original application date is December 29, 2020, and the application number is 202011602924.0. TECHNICAL FIELD

[0002] The present application relates to the technical field of electric vehicles, in particular to an electric vehicle instrument light regulation device and method BACKGROUND

[0003] With the implementation of the new national standard for electric vehicles, electric two-wheel vehicles are developing in the direction of safety, portability and longer range. Correspondingly, the materials of the whole vehicle, the battery of the electric vehicle, the battery management unit, the controller of the electric vehicle, the sensor of the whole vehicle and the communication framework of the whole vehicle have undergone new changes and developments. The electric vehicle can switch to daytime or nighttime working mode according to the input of the light sensor to improve the safety of driving. The existing electric vehicle instrument light regulation device has a single communication mode, which leads to poor efficiency of light regulation. SUMMARY

[0004] The present application provides an electric vehicle instrument light regulation device to solve the technical problem that the existing electric vehicle instrument light regulation device has a single communication mode, which leads to poor efficiency of light regulation.

[0005] An electric vehicle instrument light regulation device, comprising:

[0006] a processor, a light sensor, a backlight circuit, a display screen, a controller and an indicator light assembly; wherein,

[0007] The processor is connected with the light sensor, the backlight circuit, the controller and the indicator light assembly respectively; the output end of the backlight circuit is connected with the input end of the display screen;

[0008] A plurality of communication interfaces are arranged on the processor, and the processor is connected with the controller through the communication interfaces; the plurality of communication interfaces include at least one of a one-wire communication interface, a 485 communication interface and a CAN communication interface;

[0009] The light sensor is a resistance type sensor; the indicator light assembly includes at least one of an electric vehicle headlight, an outline light and a night light;

[0010] Further comprising a sensor PCB board, the light sensor is installed on the sensor PCB board; the light sensor is arranged on the surface of the panel of the electric vehicle instrument panel

[0011] The first MOS tube and the second MOS tube are further included; the processor is provided with an ADC1 pin, a GPO1 pin, a GPI1 pin, a GPO2 pin and a GPI2 pin; the output end of the light sensor is connected with the ADC1 interface of the processor through the second MOS tube; the ADC1 pin of the processor is connected with the second MOS tube and the first MOS tube in sequence; the GPO1 pin of the processor is connected with the first MOS tube and the second MOS tube respectively; the CPI1 pin of the processor is connected with the ADC2 pin of the controller; the GPO2 pin and the GPI1 pin of the processor are connected with the controller respectively; the first MOS tube is connected with the voltage input end;

[0012] When it is detected that the controller does not have the light sensing ADC sampling function, the GPO1 pin is controlled to output a low signal, and the first MOS tube and the second MOS tube are controlled to be opened;

[0013] The voltage signal of the output end of the light sensor is received; when the voltage signal is not in the preset voltage preset range, it is judged that the current environment is night, and the indicator light assembly is controlled to perform corresponding actions according to the current environment; the processor reduces the duty cycle of the PWM to reduce the backlight brightness of the display screen.

[0014] Preferably, the processor is further provided with a third general-purpose output pin GPO3, which is used to control a high-voltage high-power power supply to drive the high beam of the indicator light assembly to be turned on.

[0015] Preferably, the general-purpose input pin of the processor is used to detect the level state of the analog-to-digital conversion interface of the controller to determine whether it has the light sensing sampling function; when it is determined to have, the processor closes the first MOS tube and the second MOS tube, and closes the sampling function of the analog-to-digital conversion one.

[0016] Preferably, the first MOS tube is used to connect the light sensor to the power supply end to provide a bias voltage when the controller does not have the light sensing sampling function

[0017] Preferably, the input of the analog-to-digital conversion one is in a high-impedance mode, so that the input voltage is equal to the output voltage of the light sensor.

[0018] Preferably, it further includes: when it is detected that the controller has the light sensing sampling function, the GPO1 pin is controlled to maintain a high level and the first MOS tube and the second MOS tube are closed; the environmental judgment result sent by the controller through the GPI2 pin or the communication interface is received; the GPO3 pin is pulled high according to the environmental judgment result to control the high-voltage high-power power supply to be turned on and the high beam of the indicator light assembly to be turned on.

[0019] Preferably, the upper and lower limits of the preset voltage range are determined by the supply voltage, the voltage dividing resistor and the resistance values of the light sensor in the darkest state and the brightest state.

[0020] The processor is connected with the light sensor, the backlight circuit, the controller and the indicator light assembly respectively, the output end of the backlight circuit is connected with the input end of the display screen, the processor receives the voltage signal collected by the light sensor for indicating the change of the external ambient light, and judges whether the current external environment is night or day according to the voltage signal, and transmits the judgment result to the controller through the plurality of communication interfaces, so as to realize the regulation and control of the indicator light assembly and the display screen brightness. The plurality of communication interfaces are arranged on the processor, which can effectively ensure the reliability and stability of data communication in the light regulation device, thereby effectively improving the efficiency of light regulation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of a light regulation device for an electric vehicle instrument provided by the embodiment of the present application;

[0022] Figure 2 is another structural schematic diagram of a light regulation device for an electric vehicle instrument provided by the embodiment of the present application;

[0023] Figure 3 is a flow schematic diagram of a light regulation method for an electric vehicle instrument provided by the embodiment of the present application.

[0024] In the drawings of the specification, the drawing identifiers are:

[0025] 1, processor; 2, light sensor; 3, backlight circuit; 4, display screen; 5, controller; 6, indicator light assembly. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] In the description of the present application, it should be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0028] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] Please refer to Figure 1 The first embodiment of the present application provides an electric vehicle instrument light control device, comprising:

[0030] The processor 1, the light sensor 2, the backlight circuit 3, the display screen 4, the controller 5 and the indicator light assembly 6; wherein,

[0031] The processor 1 is connected with the light sensor 2, the backlight circuit 3, the controller 5 and the indicator light assembly 6 respectively; the output end of the backlight circuit 3 is connected with the input end of the display screen 4;

[0032] A plurality of communication interfaces are arranged on the processor 1, and the processor 1 is connected with the controller 5 through the communication interfaces; the plurality of communication interfaces include but are not limited to at least one of the one-wire communication interface, the 485 communication interface and the CAN communication interface.

[0033] In the embodiment of the present application, the processor 1 is connected with the light sensor 2, the backlight circuit 3, the controller 5 and the indicator light assembly 6 respectively; the output end of the backlight circuit 3 is connected with the input end of the display screen 4, the processor 1 receives the voltage signal collected by the light sensor 2 for indicating the change of the external environment light, and judges whether the current external environment is night or day according to the voltage signal, and transmits the judgment result to the controller 5 through the plurality of communication interfaces, so as to realize the regulation of the brightness of the indicator light assembly 6 and the display screen 4. The plurality of communication interfaces are arranged on the processor 1 in the embodiment of the present application, which can effectively ensure the reliability and stability of data communication in the light control device, so as to effectively improve the efficiency of light regulation.

[0034] As a specific embodiment of the present application, the light sensor 2 is a resistance type sensor.

[0035] In the embodiment of the present application, the light sensor 2 outputs different resistance values by externally providing a bias voltage, and the lowest and highest resistance value range is Rlow~Rhigh.

[0036] As a specific embodiment of the present application, the indicator light assembly 6 includes but is not limited to at least one of the electric vehicle headlamp, the contour lamp and the night light.

[0037] In this embodiment of the invention, the corresponding actions of the indicator light assembly 6 are executed according to the working mode of the electric vehicle. For example, in a nighttime environment, the headlights, contour lights, and night lights of the electric vehicle are automatically turned on; in a daytime environment, the headlights, contour lights, and night lights of the electric vehicle are automatically turned off.

[0038] As a specific embodiment of the present invention, the sensing device further includes a sensor PCB board, and the light sensor 2 is mounted on the sensor PCB board.

[0039] Optionally, the light sensor 2 is installed on the panel surface of the electric vehicle's dashboard, which can effectively improve the accuracy of the light sensor 2 in acquiring data on changes in external light.

[0040] As a specific embodiment of the present invention, it further includes a first MOS transistor and a second MOS transistor; the processor 1 is provided with ADC1 pin, GPO1 pin, GPI1 pin, GPO2 pin and GPI2 pin;

[0041] The output of the light sensor 2 is connected to the ADC1 interface of the processor 1 through the second MOS transistor;

[0042] The ADC1 pin of processor 1 is connected to the second MOSFET and the first MOSFET in sequence; the GP01 pin of processor 1 is connected to the first MOSFET and the second MOSFET respectively; the CPI1 pin of processor 1 is connected to the ADC2 pin of controller 5; the GP02 pin and GP1 pin of processor 1 are connected to controller 5 respectively; the first MOSFET is connected to the voltage input terminal.

[0043] Implementing the embodiments of the present invention has the following beneficial effects:

[0044] In this embodiment of the invention, the processor 1 is connected to the light sensor 2, the backlight circuit 3, the controller 5, and the indicator light assembly 6. The output terminal of the backlight circuit 3 is connected to the input terminal of the display screen 4. The processor 1 receives the voltage signal collected by the light sensor 2, which indicates changes in ambient light, and determines whether the current ambient light is night or day based on the voltage signal. The determination result is transmitted to the controller 5 through several communication interfaces to achieve the control of the brightness of the indicator light assembly 6 and the display screen 4. This embodiment of the invention provides multiple communication interfaces to the processor 1, which effectively ensures the reliability and stability of data communication in the light control device, thereby effectively improving the efficiency of light control.

[0045] A second embodiment of the present invention provides a method for adjusting the light intensity of an electric vehicle instrument panel, which is executed in the above-described electric vehicle instrument panel light intensity adjustment device, and includes:

[0046] S1. When it is detected that the controller does not have the optical ADC sampling function, the controller outputs a low signal on the GP01 pin to control the first MOSFET and the second MOSFET to turn on.

[0047] S2. Receive the voltage signal from the output of the light sensor; when the voltage signal is not within the preset voltage range, determine that the current environment is night and control the indicator light assembly to perform corresponding actions according to the current environment.

[0048] Please see Figure 2 In this embodiment of the invention, the controller U5 automatically determines whether it has a light-sensing ADC sampling function. Initially, the processor U1 pulls the GP01 pin signal high and turns off the first MOSFET Q1 and the second MOSFET Q2. When it is detected that the controller U5 does not have a light-sensing detection function, the ADC2 pin is open, the input signal of the processor U1's GP11 pin is low, and the processor U1's GP01 pin outputs a low signal. The first MOSFET Q1 and the second MOSFET Q2 are then turned on, so that the light sensor is connected to the VCC terminal through Q1. The processor U1's ADC1 pin is connected to the output point V1 of the light sensor through resistor R2. The processor U1 collects the voltage signal V1 at point V1 based on the ADC1 pin with AD sampling function.

[0049] In this embodiment of the invention, the range of voltage signal V1 is:

[0050] Minimum V1 = VCC x Rlow / (R1 + Rlow)

[0051] V1 maximum = VCC x Rhigh / (R1 + Rhigh)

[0052] Rlow and Rhigh are the resistance values ​​of the light sensor when the light is at its dimmest and brightest, respectively.

[0053] It should be noted that when the current environment is determined to be nighttime, the processor U1 sends the judgment result to the controller U5 through the communication interface, causing the controller U5 to perform corresponding actions based on the judgment result. Since the ADC1 pin is a high-impedance input, the voltage at the ADC pin is the voltage signal V1 sent by the output terminal of the light sensor.

[0054] As a specific implementation of this invention, after determining that the current environment is nighttime, the method further includes:

[0055] The processor reduces the backlight brightness of the display by decreasing the duty cycle of the PWM.

[0056] Please continue reading. Figure 2When the GP1 pin of processor U1 detects a high signal from ADC2, processor U1 controls the GP01 signal to remain high, turning off the first MOSFET Q1 and the second MOSFET Q2, and simultaneously disabling the sampling function of ADC1. Controller U5 sends the current environment judgment result to the processor via the GP12 pin or the communication interface. Based on the current environment judgment result, processor U1 pulls GP03 high and controls the high-voltage, high-power power supply to turn on, thereby controlling the headlights. Simultaneously, the processor reduces the PWM duty cycle, lowering the backlight brightness of the display screen. In this embodiment of the invention, the display screen is an LCD display.

[0057] Implementing the embodiments of the present invention has the following beneficial effects:

[0058] In this embodiment of the invention, by turning on the second MOS transistor connected between the light sensor and the processor, the processor can collect the voltage signal from the output terminal of the light sensor according to the ADC1 pin with AD sampling function, and determine whether the current environment is day or night based on the voltage signal. The current environment determination result is sent to the controller through the communication interface to realize the control of the indicator light assembly and the brightness adjustment of the display screen. This allows the indicator lights and screen backlight of the electric vehicle dashboard to adjust synchronously with the changes in the intensity of the external ambient light, effectively improving the efficiency of light adjustment.

[0059] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A light control device for an electric vehicle instrument panel, characterized in that, include: Processor, light sensor, backlight circuit, display screen, controller, and indicator light assembly; among which, The processor is connected to the light sensor, the backlight circuit, the controller, and the indicator light assembly, respectively; the output terminal of the backlight circuit is connected to the input terminal of the display screen. The processor is provided with a plurality of communication interfaces, and the processor is connected to the controller through the communication interfaces; the plurality of communication interfaces include, but are not limited to, at least one of a one-wire communication interface, a 485 communication interface and a CAN communication interface; The light sensor is a resistive sensor; the indicator light assembly includes, but is not limited to, at least one of electric vehicle headlights, contour lights, and night lights; It also includes a sensor PCB board, on which the light sensor is mounted; the light sensor is disposed on the panel surface of the electric vehicle dashboard; It also includes a first MOSFET and a second MOSFET; the processor is provided with ADC1 pin, GPO1 pin, GPI1 pin, GPO2 pin, and GPI2 pin; the output terminal of the light sensor is connected to the ADC1 interface of the processor through the second MOSFET; the ADC1 pin of the processor is sequentially connected to the second MOSFET and the first MOSFET; the GPO1 pin of the processor is connected to the first MOSFET and the second MOSFET respectively; the CPI1 pin of the processor is connected to the ADC2 pin of the controller; the GPO2 pin and GPI1 pin of the processor are respectively connected to the controller; the first MOSFET is connected to the voltage input terminal; When it is detected that the controller does not have the optical ADC sampling function, the controller outputs a low signal on the GP01 pin to turn on the first MOSFET and the second MOSFET. The processor receives the voltage signal from the output of the light sensor; when the voltage signal is outside the preset voltage range, it determines that the current environment is nighttime and controls the indicator light assembly to perform corresponding actions according to the current environment; the processor reduces the backlight brightness of the display screen by reducing the duty cycle of the PWM.

2. The electric vehicle instrument panel light control device as described in claim 1, characterized in that, The processor is also provided with a third general-purpose output pin GPO3, which is used to control a high-voltage, high-power power supply to drive the headlights in the indicator light assembly to turn on.

3. The electric vehicle instrument panel light control device as described in claim 1, characterized in that, The processor's general-purpose input pins are used to detect the level status of the controller's analog-to-digital converter interface to determine whether it has a light-sensing sampling function; when it is determined that it does, the processor turns off the first MOS transistor and the second MOS transistor, and turns off the sampling function of the analog-to-digital converter.

4. The electric vehicle instrument panel light control device as described in claim 1, characterized in that, The first MOSFET is used to connect the light sensor to the power supply to provide a bias voltage when the controller does not have a light-sensing sampling function.

5. The electric vehicle instrument panel light control device as described in claim 3, characterized in that, The input of the analog-to-digital converter is in a high-impedance mode so that its input voltage is equal to the output voltage of the light sensor.

6. The electric vehicle instrument panel light control device as described in claim 2, characterized in that, Also includes: When the controller is detected to have a light-sensing sampling function, the controller keeps the GP01 pin at a high level and turns off the first MOSFET and the second MOSFET; receives the environmental judgment result sent by the controller through the GP02 pin or the communication interface; and pulls the GP03 pin high according to the environmental judgment result to control the high-voltage high-power power supply to turn on and turn on the headlights in the indicator light assembly.

7. The electric vehicle instrument panel light control device as described in claim 1, characterized in that, The upper and lower limits of the preset voltage range are determined by the power supply voltage, the voltage divider resistor, and the resistance value of the light sensor in the darkest and brightest states.

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