CN116142074A

CN116142074A - Automatic anti-dazzle streaming media rearview mirror

Info

Publication number: CN116142074A
Application number: CN202310328428.8A
Authority: CN
Inventors: 梁仲文; 余鹏
Original assignee: Guangzhou Candid Electronics Co ltd
Current assignee: Guangzhou Candid Electronics Co ltd
Priority date: 2023-03-29
Filing date: 2023-03-29
Publication date: 2023-05-23

Abstract

The invention relates to an automatic anti-dazzle streaming media rearview mirror, which has the technical scheme that: comprising the following steps: the device comprises a digital-to-analog conversion module, a microcontroller for controlling output voltage of the digital-to-analog conversion module according to brightness, an operational amplification module for improving the output voltage and a control circuit for driving a rearview mirror according to the output voltage; the microcontroller is connected with the control circuit through the digital-to-analog conversion module and the operational amplification module in sequence; the anti-dazzling effect of the mirror can be adjusted according to the illumination intensity of a vehicle coming from the rear.

Description

Automatic anti-dazzle streaming media rearview mirror

Technical Field

The invention relates to the technical field of automobile rearview mirrors, in particular to an automatic anti-dazzle streaming media rearview mirror.

Background

Currently, automobiles have become the most commonly used vehicle for people. The rear-view mirror of the automobile is a main component for a driver to observe the rear situation of the automobile, and the structural functions of the internal rear-view mirrors mounted on the rear-view mirror are different from one another for automobiles of different brands and models.

When the traditional streaming media rearview mirror is used for driving at the rear of night, the car light shines on the rearview mirror to reflect light to generate strong glare, so that driving is influenced. The current streaming rearview mirror is as the patent application number of the invention patent CN202010836656.2, which adjusts the color of the EC mirror through the detected light signal so as to achieve the anti-dazzle effect, but the current streaming rearview mirror cannot generate corresponding brightness change according to different intensity light sources of a vehicle coming from the rear, so that there is room for improvement.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide an automatic anti-dazzle streaming media rearview mirror which has the advantage of being capable of adjusting the anti-dazzle effect of the mirror according to the illumination intensity of a rear vehicle.

The technical aim of the invention is realized by the following technical scheme: a brightness adjustment module for an automatic antiglare streaming media rearview mirror, comprising: the device comprises a digital-to-analog conversion module, a microcontroller for controlling output voltage of the digital-to-analog conversion module according to brightness, an operational amplification module for improving the output voltage and a control circuit for driving a rearview mirror according to the output voltage; the microcontroller is connected with the control circuit through the digital-to-analog conversion module and the operational amplification module in sequence.

Optionally, the digital-to-analog conversion module includes: the first chip, the first capacitor and the first magnetic beads; the 1 st end of the first chip is connected with the 6 th end of the first chip; the 1 st end of the first chip is connected with a DAC_5V port; the 1 st end of the first chip is connected with an LCD_5V port through a first magnetic bead; the 1 st end of the first chip is grounded through the first capacitor; the 2 nd end of the first chip is grounded; the 3 rd end of the first chip is connected with an SCL_DAC port of the controller; the 4 th end of the first chip is connected with an SDA_DAC port of the controller; the 5 th end of the first chip is connected with a transport amplifying module; and the 6 th end of the first chip is connected with the DAC_5V port.

Optionally, the operational amplification module includes: the second chip, the first resistor, the second resistor, the third resistor, the fourth resistor and the second capacitor; the 1 st end of the second chip is connected with the LC_PWR port through a first resistor; the 2 nd end of the second chip is grounded; the 3 rd end of the second chip is connected with the digital-to-analog conversion module through a second resistor; the 3 rd end of the second chip is grounded through a second capacitor; the 3 rd end of the second chip is grounded through a second resistor and a third resistor in sequence; the 4 th end of the second chip is connected with the LC_PWR port through a fourth resistor and a first resistor in sequence; and the 5 th end of the second chip is connected with the DAC_5V port.

Optionally, the control circuit includes: the first NMOS transistor, the second NMOS transistor, the third NMOS transistor, the fourth NMOS transistor, the first triode, the second triode, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor, the ninth resistor and the tenth resistor; the source electrode of the first NMOS tube is grounded; the source electrode of the first NMOS tube is connected with the emitter electrode of the first triode; the source electrode of the first NMOS tube is connected with the base electrode of the first triode through a fifth resistor; the source electrode of the first NMOS tube is connected with the LC_SEC port through a fifth resistor and a sixth resistor in sequence; the drain electrode of the first NMOS tube is connected with the source electrode of the second NMOS tube; the drain electrode of the first NMOS tube is connected with the SEC port; the grid electrode of the first NMOS tube is connected with the collector electrode of the first triode; the grid electrode of the first NMOS tube is connected with the grid electrode of the second NMOS tube; the grid electrode of the first NMOS tube is connected with the LC_PWR port through a seventh resistor; the drain electrode of the second NMOS tube is connected with the LC_PWR port; the source electrode of the third NMOS tube is grounded; the source electrode of the third NMOS tube is connected with the emitter electrode of the second triode; the source electrode of the third NMOS tube is connected with the base electrode of the second triode through an eighth resistor; the source electrode of the third NMOS tube is connected with the LC_COM port through an eighth resistor and a ninth resistor in sequence; the drain electrode of the third NMOS tube is connected with the source electrode of the fourth NMOS tube; the drain electrode of the third NMOS tube is connected with a COM port; the grid electrode of the third NMOS tube is connected with the collector electrode of the second triode; the grid electrode of the third NMOS tube is connected with the grid electrode of the fourth NMOS tube; the grid electrode of the third NMOS tube is connected with the LC_PWR port through a tenth resistor; and the drain electrode of the fourth NMOS tube is connected with the LC_PWR port.

An automatic antiglare streaming media rearview mirror comprising: the device comprises a shell, an electric control dimming glass lens, a front ambient light sensor, a rear ambient light sensor and a brightness adjusting module; the brightness adjusting module is arranged in the shell; the electric control dimming glass lens is arranged on one side of the shell; the front ambient light sensor is arranged on the other side of the shell; the rear ambient light sensor is arranged on one side of the shell; and the front ambient light sensor, the rear ambient light sensor and the electric control dimming glass lens are electrically connected with the brightness adjusting module.

An automatic antiglare method for an automatic antiglare streaming media rearview mirror, comprising:

respectively acquiring front illumination intensity information and rear illumination intensity information received by a front ambient light sensor and a rear ambient light sensor;

calculating a rear light intensity variation value according to the front illumination intensity information and the rear illumination intensity information;

calculating the reflectivity of the electric control dimming glass lens according to the rear light intensity variation value;

the output voltage value is regulated by the digital-analog conversion module according to the reflectivity calculation;

and controlling the electric control dimming glass lens to adjust the reflectivity according to the voltage value.

Optionally, the controlling the electrically controlled dimming glass lens to adjust the reflectivity according to the voltage value includes:

controlling the digital-to-analog conversion module to output corresponding voltage V0 according to the voltage value;

the operational amplification module receives the voltage V0 and amplifies the voltage V0 to output a voltage V1;

the control circuit generates a first square wave and a second square wave which have the same amplitude and opposite phases according to the voltage V1;

and adjusting the reflectivity of the electric control dimming glass lens according to the first square wave and the second square wave.

In summary, the invention has the following beneficial effects: the microcontroller reads the front illumination intensity information and the back illumination intensity information through the I2C, calculates a rear light intensity variation value, calculates a current required voltage value according to a pre-established functional relation between voltage and reflectivity and a functional relation between light intensity and reflectivity, controls the MCP47A1 chip to output a corresponding voltage V0, the voltage V0 passes through a voltage follower MCP6006 formed by an operational amplifier IC to reduce output impedance and improve load carrying capacity, outputs the voltage V1 to the control circuit through an LC_PWR port, and the control circuit receives the voltage V1, generates two square waves with the same amplitude and opposite phase to 64Hz according to electric signals received by the SEC port and the COM port, and outputs the square waves to the back electrode and the segment electrode of the electric control dimming glass lens from the LC_port and the LC_COM port, so as to drive the electric control dimming glass lens and control the reflectivity and the transmissivity of the electric control glass lens.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of another angle configuration of the present invention;

FIG. 3 is a circuit block diagram of the present invention;

FIG. 4 is a schematic circuit diagram of a digital-to-analog conversion module and an operational amplifier module in the brightness adjustment module according to the present invention;

FIG. 5 is a schematic circuit diagram of a control circuit in the brightness adjustment module of the present invention;

fig. 6 is a flow chart of the automatic antiglare method of the present invention.

In the figure: 1. a housing; 2. an electric control dimming glass lens; 3. a front ambient light sensor; 4. a rear ambient light sensor; 5. a brightness adjustment module; 51. a digital-to-analog conversion module; 52. a microcontroller; 53. an operational amplification module; 54. a control circuit; u1, a first chip; u2 second chip; r1, a first resistor;

r2, a second resistor; r3, a third resistor; r4, a fourth resistor; r5, a fifth resistor; r6, a sixth resistor; r7, a seventh resistor; r8, eighth resistor; r9, ninth resistor; r10, tenth resistor; c1, a first capacitor; c2, a second capacitor; FB1, first magnetic beads; NMOS1, a first NMOS tube; NMOS2, a second NMOS tube; NMOS3, a third NMOS tube; NMOS4, a fourth NMOS tube; q1, a first triode; q2, second triode.

Detailed Description

In order that the objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Several embodiments of the invention are presented in the figures. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature. The terms "vertical," "horizontal," "left," "right," "up," "down," and the like are used for descriptive purposes only and are not to indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

The present invention will be described in detail below with reference to the accompanying drawings and examples.

The invention provides a brightness adjusting module 5 of an automatic anti-dazzle streaming media rearview mirror, which is shown in figures 3-5 and comprises the following components: the digital-to-analog conversion module 51, the microcontroller 52 for controlling the output voltage of the digital-to-analog conversion module 51 according to the brightness, the operational amplification module 53 for increasing the output voltage, and the control circuit 54 for driving the rearview mirror according to the output voltage; the microcontroller 52 is connected with the control circuit 54 through the digital-to-analog conversion module 51 and the operational amplification module 53 in sequence.

In practical application, the microcontroller 52 receives the illumination intensity of the coming vehicle, and controls the digital-to-analog conversion module 51 to output corresponding voltage according to the illumination intensity, the output voltage is amplified by the operational amplification module 53, the output impedance is reduced to improve the load capacity, the amplified voltage is output, and the amplified voltage is converted into square waves with the same amplitude and opposite phases by the control circuit 54 and is applied to the back electrode and the segment electrode of the electric control dimming glass lens 2 to control the reflectivity and the transmissivity of the electric control dimming glass lens 2. Wherein the electrically controlled dimming glass mirror 2 is an LC mirror, the refractive index of which is related to the voltages on its back electrode and segment electrode.

Further, the digital-to-analog conversion module 51 includes: the first chip U1, the first capacitor and the first magnetic beads; the 1 st end of the first chip U1 is connected with the 6 th end of the first chip U1; the 1 st end of the first chip U1 is connected with a DAC_5V port; the 1 st end of the first chip U1 is connected with an LCD_5V port through a first magnetic bead; the 1 st end of the first chip U1 is grounded through the first capacitor; the 2 nd end of the first chip U1 is grounded; the 3 rd end of the first chip U1 is connected with an SCL_DAC port of the controller; the 4 th end of the first chip U1 is connected with an SDA_DAC port of the controller; the 5 th end of the first chip U1 is connected with a transportation amplifying module; the 6 th end of the first chip U1 is connected with the DAC_5V port.

In practical application, the first chip U1 is a DAC chip with a model of MCP47A1, and the microcontroller 52 reads the light intensity of the vehicle behind through the I2C to calculate the voltage value currently required, and then controls the DAC chip with a model of MCP47A1 to output the corresponding voltage through the scl_dac port and the sda_dac port.

Optionally, the operational amplification module 53 includes: the second chip, the first resistor, the second resistor, the third resistor, the fourth resistor and the second capacitor; the 1 st end of the second chip is connected with the LC_PWR port through a first resistor; the 2 nd end of the second chip is grounded; the 3 rd end of the second chip is connected with the digital-to-analog conversion module 51 through a second resistor; the 3 rd end of the second chip is grounded through a second capacitor; the 3 rd end of the second chip is grounded through a second resistor and a third resistor in sequence; the 4 th end of the second chip is connected with the LC_PWR port through a fourth resistor and a first resistor in sequence; and the 5 th end of the second chip is connected with the DAC_5V port.

In practical application, the second chip is a voltage follower with the model number of MCP 6006; after receiving the voltage output by the DAC chip, the voltage follower formed by the op-amp IC can reduce the output impedance, improve the load capacity, and output to the control circuit 54 through the lc_pwr port.

Optionally, the control circuit 54 includes: the first NMOS transistor, the second NMOS transistor, the third NMOS transistor, the fourth NMOS transistor, the first triode, the second triode, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor, the ninth resistor and the tenth resistor; the source electrode of the first NMOS tube is grounded; the source electrode of the first NMOS tube is connected with the emitter electrode of the first triode; the source electrode of the first NMOS tube is connected with the base electrode of the first triode through a fifth resistor; the source electrode of the first NMOS tube is connected with the LC_SEC port through a fifth resistor and a sixth resistor in sequence; the drain electrode of the first NMOS tube is connected with the source electrode of the second NMOS tube; the drain electrode of the first NMOS tube is connected with the SEC port; the grid electrode of the first NMOS tube is connected with the collector electrode of the first triode; the grid electrode of the first NMOS tube is connected with the grid electrode of the second NMOS tube; the grid electrode of the first NMOS tube is connected with the LC_PWR port through a seventh resistor; the drain electrode of the second NMOS tube is connected with the LC_PWR port; the source electrode of the third NMOS tube is grounded; the source electrode of the third NMOS tube is connected with the emitter electrode of the second triode; the source electrode of the third NMOS tube is connected with the base electrode of the second triode through an eighth resistor; the source electrode of the third NMOS tube is connected with the LC_COM port through an eighth resistor and a ninth resistor in sequence; the drain electrode of the third NMOS tube is connected with the source electrode of the fourth NMOS tube; the drain electrode of the third NMOS tube is connected with a COM port; the grid electrode of the third NMOS tube is connected with the collector electrode of the second triode; the grid electrode of the third NMOS tube is connected with the grid electrode of the fourth NMOS tube; the grid electrode of the third NMOS tube is connected with the LC_PWR port through a tenth resistor; and the drain electrode of the fourth NMOS tube is connected with the LC_PWR port.

In practical application, the microcontroller 52 controls two NMOS tube circuits through COM port and SEC port, converts the amplified voltage output by the operational amplification module 53 into square waves with the same amplitude and opposite phases, and applies the square waves to the back electrode and the segment electrode of the electrically controlled dimming glass lens 2 through lc_com port and lc_sec port respectively, so as to drive the electrically controlled dimming glass lens 2 and control the reflectivity and the perspective thereof.

The application also provides an automatic anti-dazzle streaming media rearview mirror, as shown in fig. 1 and fig. 2, comprising: a housing 1, an electrically controlled dimming glass lens 2, a front ambient light sensor 3, a rear ambient light sensor 4, and a brightness adjustment module 5 as described above; the brightness adjusting module 5 is arranged in the shell 1; the electric control dimming glass lens 2 is arranged on one side of the shell 1; the front ambient light sensor 3 is arranged on the other side of the housing 1; the rear ambient light sensor 4 is provided at one side of the housing 1; the front ambient light sensor 3, the rear ambient light sensor 4 and the electric control dimming glass lens 2 are electrically connected with the brightness adjusting module 5.

In practical application, the illumination intensity of the current coming vehicle and the coming vehicle which are directly irradiated onto the electric control dimming glass lens 2 can be calculated through the front ambient light sensor 3 and the rear ambient light sensor 4, so that the reflectivity and the perspective rate of the electric control dimming glass lens 2 are controlled more accurately, and the anti-dazzle function is realized.

The application also provides an automatic anti-dazzle method of the automatic anti-dazzle streaming media rearview mirror, which comprises the following steps as shown in fig. 6:

step 100, respectively acquiring front illumination intensity information and rear illumination intensity information received by a front ambient light sensor 3 and a rear ambient light sensor 4;

step 200, calculating a rear light intensity change value according to the front illumination intensity information and the rear illumination intensity information;

step 300, calculating the reflectivity of the electric control dimming glass lens 2 according to the rear light intensity variation value;

step 400, adjusting the output voltage value by the digital-analog conversion module 51 according to the reflectivity calculation;

and 500, controlling the electric control dimming glass lens 2 to adjust the reflectivity according to the voltage value.

In practical application, front illumination intensity information and rear illumination intensity information of a vehicle are respectively obtained through a front ambient light sensor 3 and a rear ambient light sensor 4, a rear light intensity change value is calculated according to a difference value between the rear illumination intensity information and the front illumination intensity information, so that illumination intensity on a direct-irradiation electric control dimming glass lens 2 of a rear vehicle is determined, then a voltage value required for realizing optimal reflectivity under the current illumination intensity is calculated according to a pre-established functional relation between voltage and reflectivity and a functional relation between light intensity and reflectivity, and then a digital-to-analog conversion module 51 is controlled by a microcontroller 52 to adjust the output voltage value and the electric control dimming glass lens 2 is controlled to adjust the reflectivity; when the rear ambient light sensor 4 monitors the illumination intensity change of the coming vehicle, a rear light intensity change value can be generated, and a current output voltage value can be obtained by simple function calculation according to the rear light intensity change value, so that the reflectivity of the electric control dimming glass lens 2 is quickly regulated, and the anti-dazzle effect of the electric control dimming glass lens 2 is realized.

Further, the controlling the electrically controlled dimming glass lens 2 according to the voltage value adjusts the reflectivity, including:

controlling the digital-to-analog conversion module 51 to output a corresponding voltage V0 according to the voltage value;

the operational amplification module 53 receives the voltage V0 and amplifies the voltage V1 to output the voltage V1;

the control circuit 54 generates a first square wave and a second square wave with the same amplitude and opposite phases according to the voltage V1;

and adjusting the reflectivity of the electric control dimming glass lens 2 according to the first square wave and the second square wave.

In practical application, the microcontroller 52 reads the front illumination intensity information and the back illumination intensity information through the I2C, calculates a back light intensity variation value, calculates a currently required voltage value according to a pre-established functional relation between voltage and reflectivity and a functional relation between light intensity and reflectivity, and controls the MCP47A1 chip to output a corresponding voltage V0, the voltage V0 passes through a voltage follower MCP6006 formed by an op amp IC to reduce output impedance and improve load capacity, the voltage V1 is output to the control circuit 54 through the lc_pwr port, the control circuit 54 receives the voltage V1 and generates two square waves with the same amplitude and opposite phases according to the electrical signals received by the SEC port and the COM port, and outputs the two square waves to the back electrode and the segment electrode of the electrically controlled dimming glass lens 2 from the lc_sec port and the lc_com port, respectively, thereby driving the electrically controlled dimming glass lens 2 and controlling the reflectivity and the transmissivity thereof.

The automatic anti-dazzle streaming media rearview mirror can adjust the anti-dazzle effect of the mirror according to the illumination intensity of a vehicle coming from the rear.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims

1. A brightness adjustment module for an automatic anti-glare streaming media rearview mirror, comprising: the device comprises a digital-to-analog conversion module, a microcontroller for controlling output voltage of the digital-to-analog conversion module according to brightness, an operational amplification module for improving the output voltage and a control circuit for driving a rearview mirror according to the output voltage; the microcontroller is connected with the control circuit through the digital-to-analog conversion module and the operational amplification module in sequence.

2. The automatic antiglare streaming media rearview mirror of claim 1, wherein the digital to analog conversion module comprises: the first chip, the first capacitor and the first magnetic beads; the 1 st end of the first chip is connected with the 6 th end of the first chip; the 1 st end of the first chip is connected with a DAC_5V port; the 1 st end of the first chip is connected with an LCD_5V port through a first magnetic bead; the 1 st end of the first chip is grounded through the first capacitor; the 2 nd end of the first chip is grounded; the 3 rd end of the first chip is connected with an SCL_DAC port of the controller; the 4 th end of the first chip is connected with an SDA_DAC port of the controller; the 5 th end of the first chip is connected with a transport amplifying module; and the 6 th end of the first chip is connected with the DAC_5V port.

3. The automatic antiglare streaming media rearview mirror of claim 2, wherein the operational amplifier module comprises: the second chip, the first resistor, the second resistor, the third resistor, the fourth resistor and the second capacitor; the 1 st end of the second chip is connected with the LC_PWR port through a first resistor; the 2 nd end of the second chip is grounded; the 3 rd end of the second chip is connected with the digital-to-analog conversion module through a second resistor; the 3 rd end of the second chip is grounded through a second capacitor; the 3 rd end of the second chip is grounded through a second resistor and a third resistor in sequence; the 4 th end of the second chip is connected with the LC_PWR port through a fourth resistor and a first resistor in sequence; and the 5 th end of the second chip is connected with the DAC_5V port.

4. An automatic antiglare streaming media rearview mirror according to claim 3, wherein the control circuit comprises: the first NMOS transistor, the second NMOS transistor, the third NMOS transistor, the fourth NMOS transistor, the first triode, the second triode, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor, the ninth resistor and the tenth resistor; the source electrode of the first NMOS tube is grounded; the source electrode of the first NMOS tube is connected with the emitter electrode of the first triode; the source electrode of the first NMOS tube is connected with the base electrode of the first triode through a fifth resistor; the source electrode of the first NMOS tube is connected with the LC_SEC port through a fifth resistor and a sixth resistor in sequence; the drain electrode of the first NMOS tube is connected with the source electrode of the second NMOS tube; the drain electrode of the first NMOS tube is connected with the SEC port; the grid electrode of the first NMOS tube is connected with the collector electrode of the first triode; the grid electrode of the first NMOS tube is connected with the grid electrode of the second NMOS tube; the grid electrode of the first NMOS tube is connected with the LC_PWR port through a seventh resistor; the drain electrode of the second NMOS tube is connected with the LC_PWR port; the source electrode of the third NMOS tube is grounded; the source electrode of the third NMOS tube is connected with the emitter electrode of the second triode; the source electrode of the third NMOS tube is connected with the base electrode of the second triode through an eighth resistor; the source electrode of the third NMOS tube is connected with the LC_COM port through an eighth resistor and a ninth resistor in sequence; the drain electrode of the third NMOS tube is connected with the source electrode of the fourth NMOS tube; the drain electrode of the third NMOS tube is connected with a COM port; the grid electrode of the third NMOS tube is connected with the collector electrode of the second triode; the grid electrode of the third NMOS tube is connected with the grid electrode of the fourth NMOS tube; the grid electrode of the third NMOS tube is connected with the LC_PWR port through a tenth resistor; and the drain electrode of the fourth NMOS tube is connected with the LC_PWR port.

5. An automatic antiglare streaming media rearview mirror, comprising: a housing, an electrically controlled dimming glass lens, a front ambient light sensor, a rear ambient light sensor, and a brightness adjustment module according to any one of claims 1-4; the brightness adjusting module is arranged in the shell; the electric control dimming glass lens is arranged on one side of the shell; the front ambient light sensor is arranged on the other side of the shell; the rear ambient light sensor is arranged on one side of the shell; and the front ambient light sensor, the rear ambient light sensor and the electric control dimming glass lens are electrically connected with the brightness adjusting module.

6. An automatic antiglare method for an automatic antiglare streaming media rearview mirror according to claim 5, comprising:

7. The automatic antiglare method according to claim 6, wherein controlling the electrically controlled dimming glass lens to adjust the reflectance according to the voltage value comprises: