CN110936898A - Intelligent anti-glare rearview mirror and control method - Google Patents
Intelligent anti-glare rearview mirror and control methodDownload PDFInfo
- Publication number
- CN110936898A CN110936898ACN201911213739.XACN201911213739ACN110936898ACN 110936898 ACN110936898 ACN 110936898ACN 201911213739 ACN201911213739 ACN 201911213739ACN 110936898 ACN110936898 ACN 110936898A
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- illumination intensity
- light sensor
- rearview mirror
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- glare
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- 238000000034methodMethods0.000titleclaimsdescription13
- 238000005286illuminationMethods0.000claimsabstractdescription64
- 239000011521glassSubstances0.000claimsdescription6
- 239000004973liquid crystal related substanceSubstances0.000claimsdescription6
- 239000012790adhesive layerSubstances0.000claimsdescription3
- 239000010410layerSubstances0.000claimsdescription3
- 230000001681protective effectEffects0.000claimsdescription3
- 230000004313glareEffects0.000abstractdescription14
- 230000007306turnoverEffects0.000description3
- 238000010586diagramMethods0.000description2
- 230000000694effectsEffects0.000description2
- 230000009286beneficial effectEffects0.000description1
- 230000001143conditioned effectEffects0.000description1
- 230000007547defectEffects0.000description1
- 238000001514detection methodMethods0.000description1
- 230000035484reaction timeEffects0.000description1
- 238000011897real-time detectionMethods0.000description1
- 230000011514reflexEffects0.000description1
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Classifications
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/02—Rear-view mirror arrangements
- B60R1/08—Rear-view mirror arrangements involving special optical features, e.g. avoiding blind spots, e.g. convex mirrors; Side-by-side associations of rear-view and other mirrors
- B60R1/083—Anti-glare mirrors, e.g. "day-night" mirrors
- B60R1/088—Anti-glare mirrors, e.g. "day-night" mirrors using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Rear-View Mirror Devices That Are Mounted On The Exterior Of The Vehicle (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
Description
Technical Field
The invention relates to a rearview mirror of an automobile, in particular to an intelligent anti-dazzle rearview mirror and a control method.
Background
When the automobile travels at night or in dim environments such as bridge holes and tunnels, glare can be generated when headlights of rear vehicles irradiate on rearview mirrors of the automobile, and therefore drivers are blinded at night. Even after the glare light source is removed, the image remaining in the driver's eyes causes blind spots, which is called "glare phenomenon". This effect reduces the reaction time of the driver and clearly greatly increases the probability of an accident in the vehicle within a short glare time.
The existing traditional rearview mirror realizes the anti-glare effect by manually adjusting the surfaces of the double reflectors. However, in actual driving, if the glare is too strong, the conditioned reflex of the driver may close the eyes immediately or block the eyes with hands, and then adjust the rearview mirror. This also risks accidents.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides the intelligent anti-glare rearview mirror, which can be automatically adjusted to prevent glare and improve the safety of night driving. This rear-view mirror of intelligence anti-dazzle includes:
the light source comprises a front shell and a rear shell, wherein a first light sensor is arranged on the front shell, and a second light sensor is arranged on the rear shell;
the light and shade degree of the electric sensitive color-changing lens can change along with the change of voltage after the electric sensitive color-changing lens is electrified;
the first light sensor, the second light sensor and the electrochromic lens are respectively and electrically connected with the control unit;
a power supply that supplies power to the control unit;
the first light sensor is used for detecting the illumination intensity L1 of the environment; the second light sensor is used for detecting the illumination intensity L2 of a vehicle behind, the illumination intensity L2 is greater than the illumination intensity L1, and the control unit changes the voltage so that the electrochromic lens overturns to dim the mirror surface.
Furthermore, the control unit comprises an MCU processor, a digital-to-analog converter respectively connected with the first light sensor and the second light sensor, and an execution unit connected with the electrochromic lens.
Further, the control unit sets a threshold value L0, which represents the lowest light intensity in the daytime; when the illumination intensity L1 is greater than the threshold value L0, the MCU processor outputs a high-level signal; when the illumination intensity L1 is less than the threshold value L0 and the illumination intensity L1 is greater than the illumination intensity L2, the MCU processor outputs a high level signal; when the illumination intensity L1 is less than the threshold value L0 and when the illumination intensity L2 is greater than the illumination intensity L1, the MCU processor outputs a low level signal, thereby controlling the electrochromic lens to flip over so that the electrochromic lens becomes dim.
Further, the illumination intensity L2 is greater than the illumination intensity L1 by more than 500LUX, and the MCU processor outputs a low signal.
Furthermore, the electrochromic lens sequentially comprises a protective film, a reflecting film, a stripping film, an adhesive layer, a TAC layer, a front polarizer, liquid crystal upper glass, liquid crystal lower glass and a rear polarizer from the incident light direction.
Further, the first light sensor is arranged at the lower right corner of the front shell, and the second light sensor is arranged at the upper center of the rear shell.
The invention also comprises a control method of the intelligent anti-dazzle rearview mirror, which comprises the following steps:
the control unit predetermines a threshold value L0, which represents the lowest light intensity during the day;
the first light sensor detects that the illumination intensity of the environment is L1, the control unit compares the sizes of L0 and L1, and if L1 is larger than L0, the current day is judged, and the anti-dazzle mode is not started; if L1 is smaller than L0, judging that the current time is night, and starting an anti-dazzle mode;
when the rearview mirror is in an anti-glare mode, the second light sensor detects that the illumination intensity of a rear vehicle is L2, the control unit compares the L1 and the L2, and if the L1 is smaller than the L2, the control unit changes the voltage, so that the electrochromic lens is turned over to dim the mirror surface of the electrochromic lens.
Further, when the anti-dazzle mode is not started, the voltage of the photosensitive color-changing lens is not applied; in the anti-glare mode, the electrochromic lens has a loaded voltage.
Further, the illumination intensity L2 is greater than the illumination intensity L1 by more than 500LUX, and the loading voltage of the electrochromic lens is changed.
Further, the voltage value of the electrochromic lens is proportional to the difference between L2 and L1.
The invention has the following beneficial effects:
the intelligent anti-glare rearview mirror can automatically detect whether the lamp of a rear vehicle irradiates the rearview mirror to generate glare or not, and can automatically turn over the electro-sensitive color-changing lens under the condition of the glare, so that the mirror surface of the rearview mirror becomes dim to prevent the glare, and the driving safety is improved;
the rearview mirror can correspondingly adjust the turnover angle of the electrochromic lens according to the illumination intensity of a rear vehicle, so that the mirror surface has corresponding dim degree, and the adaptability of the rearview mirror is stronger.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of an intelligent anti-glare rearview mirror in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an electrochromic lens of an intelligent anti-glare rearview mirror in an embodiment of the invention;
FIG. 3 is a control circuit diagram of the intelligent anti-glare rearview mirror in an embodiment of the present invention;
fig. 4 is a flowchart of a method for controlling an intelligent anti-glare rearview mirror according to an embodiment of the present invention.
Reference numerals of the above figures: a front housing-1; a first light sensor-11; an electrochromic lens-2; a control unit-3; MCU processor-31; -32, a digital-to-analog converter; an execution unit-33; a rear shell-4; a second light sensor-41;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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 defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.
To achieve the above object, the present invention provides an intelligent anti-glare rearview mirror, as shown in fig. 1. The intelligent anti-glare rearview mirror comprises afront shell 1 and a rear shell 4, wherein afirst light sensor 11 is arranged on thefront shell 1, and asecond light sensor 41 is arranged on the rear shell 4; the electro-sensitive color-changinglens 2, the brightness of the electro-sensitive color-changinglens 2 can change along with the voltage change after being electrified; thecontrol unit 3 is electrically connected with thefirst light sensor 11, thesecond light sensor 41 and theelectrochromic lens 2 respectively; and the power supply supplies power to thecontrol unit 3, a power switch is arranged on the rear shell 4, and a driver can manually control the power switch of the rearview mirror. In the present embodiment, thefirst light sensor 11 is used for detecting the illumination intensity L1 of the environment; thesecond light sensor 41 is used for detecting the illumination intensity L2 of the vehicle behind, the illumination intensity L2 is greater than the illumination intensity L1, and thecontrol unit 3 changes the voltage so that theelectrochromic lens 2 is turned over to dim the mirror surface.
The rear-view mirror in this embodiment has thefirst light sensor 11 that detects the light intensity of the environment to and the second sensor that detects the light intensity of rear vehicle, and thecontrol unit 3 can compare the detection data offirst light sensor 11 andsecond light sensor 41, judges whether produce the glare, thereby the function of automatic anti-dazzle is realized to the on-off regulation mirror surface of control electrochromic lens 2's voltage becomes dim.
Specifically, as shown in fig. 3, thecontrol unit 3 includes anMCU processor 31, digital-to-analog converters 32 respectively connected to thefirst light sensor 11 and thesecond light sensor 41, and anexecution unit 33 connected to theelectrochromic lens 2. The power supply is thecontrol unit 3,first light sensor 11 and the power supply ofsecond light sensor 41,first light sensor 11 and the illumination intensity ofsecond light sensor 41 real-time detection environment and rear vehicle, digital-to-analog converter 32 converts the signal offirst light sensor 11 andsecond light sensor 41 into digital signal and transmits toMCU treater 31,MCU treater 31 handles the judgement to the digital signal who receives, output control signal toexecution unit 33 according to the judged result,execution unit 33 adjustselectrochromic lens 2 after receiving control signal.
Further, thecontrol unit 3 sets a threshold L0, which represents the lowest light intensity in the daytime; when the illumination intensity L1 is greater than the threshold value L0, theMCU processor 31 outputs a high level signal; when the illumination intensity L1 is less than the threshold L0, and the illumination intensity L1 is greater than the illumination intensity L2, theMCU processor 31 outputs a high level signal; when the illumination intensity L1 is less than the threshold value L0 and when the illumination intensity L2 is greater than the illumination intensity L1, theMCU processor 31 outputs a low level signal, thereby controlling theelectrochromic lens 2 to flip such that theelectrochromic lens 2 becomes dim.
After a plurality of experiments, when the illumination intensity of the rear vehicle is more than 500LUX higher than the illumination intensity of the environment, the obvious glare phenomenon is generated. Preferably, in this embodiment, when the light intensity L2 is greater than the light intensity L1 by more than 500LUX, theMCU processor 31 outputs a low signal.
Further, as shown in fig. 2, theelectrochromic lens 2 includes a protective film, a reflective film, a peeling film, an adhesive layer, a TAC layer, a front polarizer, a liquid crystal upper glass, a liquid crystal lower glass, and a rear polarizer in this order from the incident light direction.
Preferably, thefirst light sensor 11 is disposed at a lower right corner of thefront case 1, and thesecond light sensor 41 is disposed at an upper center of the rear case 4. The intensity of ambient light received by the lower right corner of thefront casing 1 is lower than that of ambient light at other positions, and the light intensity L1 detected by thefirst light sensor 11 arranged at the lower right corner of thefront casing 1 is smaller; the illumination intensity that the top central point of rear housing 4 can accept the rear vehicle is great, and the illumination intensity L2 thatsecond light sensor 41 set up the top central point of rear housing 4 and detect is on the large side, therefore the difference between illumination intensity L2 and illumination intensity L1 is on the large side to the scope of triggering quickphotochromic lens 2 is bigger, improves the security.
The invention also comprises a control method of the intelligent anti-dazzle rearview mirror, which is shown in figure 4. The control method comprises the following steps:
thecontrol unit 3 predetermines a threshold L0, which represents the lowest light intensity during the day;
thefirst light sensor 11 detects that the illumination intensity of the environment is L1, thecontrol unit 3 compares the sizes of L0 and L1, and if L1 is greater than L0, it is determined that the current day is the daytime, and the anti-glare mode is not started; if L1 is smaller than L0, judging that the current time is night, and starting an anti-dazzle mode;
when the rearview mirror is in the anti-glare mode, thesecond light sensor 41 detects that the illumination intensity of a rear vehicle is L2, thecontrol unit 3 compares the magnitudes of L1 and L2, and if L1 is smaller than L2, thecontrol unit 3 changes the voltage magnitude, so that theelectrochromic lens 2 is turned over to make the mirror surface dim.
Specifically, when the anti-glare mode is not turned on, theelectrochromic lens 2 is not energized; in the anti-glare mode, theelectrochromic lens 2 has a voltage applied thereto.
The first priority of the control method is to determine whether the illumination intensity of the environment reaches the degree of "bright", that is, whether the illumination intensity L1 is greater than the threshold L0, and when the illumination intensity of the environment is sufficiently bright, the rearview mirror does not need to turn on the anti-glare mode. When the ambient light intensity is insufficient, it is determined whether the light intensity L2 of the rear vehicle is greater than the ambient light intensity L1, i.e., whether the glare phenomenon occurs. Therefore, a plurality of false glare phenomena can be avoided, the condition of invalid turnover of the photosensitive color-changing lens is reduced, and the automatic anti-glare operation is more accurate.
Preferably, the illumination intensity L2 is greater than the illumination intensity L1 by more than 500LUX, and the loading voltage of theelectrochromic lens 2 is changed.
Preferably, the voltage value of theelectrochromic mirror 2 is proportional to the difference between L2 and L1.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. An intelligent anti-glare rearview mirror, comprising:
the light source comprises a front shell and a rear shell, wherein a first light sensor is arranged on the front shell, and a second light sensor is arranged on the rear shell;
the light and shade degree of the electric sensitive color-changing lens can change along with the change of voltage after the electric sensitive color-changing lens is electrified;
the first light sensor, the second light sensor and the electrochromic lens are respectively and electrically connected with the control unit;
a power supply that supplies power to the control unit;
the first light sensor is used for detecting the illumination intensity L1 of the environment; the second light sensor is used for detecting the illumination intensity L2 of a vehicle behind, the illumination intensity L2 is greater than the illumination intensity L1, and the control unit changes the voltage so that the electrochromic lens overturns to dim the mirror surface.
2. The intelligent anti-glare rearview mirror of claim 1, wherein the control unit comprises an MCU processor, digital-to-analog converters respectively connected to the first and second light sensors, and an execution unit connected to the electrochromic lens.
3. The intelligent anti-glare rearview mirror according to claim 2, wherein the control unit sets a threshold value L0, which represents a minimum light intensity in the daytime; when the illumination intensity L1 is greater than the threshold value L0, the MCU processor outputs a high-level signal; when the illumination intensity L1 is less than the threshold value L0 and the illumination intensity L1 is greater than the illumination intensity L2, the MCU processor outputs a high level signal; when the illumination intensity L1 is less than the threshold value L0 and when the illumination intensity L2 is greater than the illumination intensity L1, the MCU processor outputs a low level signal, thereby controlling the electrochromic lens to flip over so that the electrochromic lens becomes dim.
4. The intelligent anti-glare rearview mirror of claim 3, wherein the illumination intensity L2 is greater than the illumination intensity L1 by more than 500LUX, and the MCU processor outputs a low-level signal.
5. The intelligent anti-glare rearview mirror according to claim 4, wherein the electrochromic mirror comprises a protective film, a reflective film, a release film, an adhesive layer, a TAC layer, a front polarizer, a liquid crystal upper glass, a liquid crystal lower glass and a rear polarizer in this order from the incident light direction.
6. The intelligent anti-glare rearview mirror of claim 5, wherein the first light sensor is disposed at a lower right corner of the front housing and the second light sensor is disposed at an upper center of the rear housing.
7. A control method of an intelligent anti-glare rearview mirror is characterized by comprising the following steps:
the control unit predetermines a threshold value L0, which represents the lowest light intensity during the day;
the first light sensor detects that the illumination intensity of the environment is L1, the control unit compares the sizes of L0 and L1, and if L1 is larger than L0, the current day is judged, and the anti-dazzle mode is not started; if L1 is smaller than L0, judging that the current time is night, and starting an anti-dazzle mode;
when the rearview mirror is in an anti-glare mode, the second light sensor detects that the illumination intensity of a rear vehicle is L2, the control unit compares the L1 and the L2, and if the L1 is smaller than the L2, the control unit changes the voltage, so that the electrochromic lens is turned over to dim the mirror surface of the electrochromic lens.
8. The control method of intelligent anti-glare rearview mirror according to claim 7, wherein the electrochromic lens is not energized when the anti-glare mode is not turned on; in the anti-glare mode, the electrochromic lens has a loaded voltage.
9. The method for controlling an intelligent anti-glare rearview mirror according to claim 8, wherein the illumination intensity L2 is greater than the illumination intensity L1 by 500LUX or more, and the applied voltage of the electrochromic mirror is changed.
10. The method for controlling an intelligent anti-glare rearview mirror according to claim 9, wherein the voltage value of the electrochromic mirror is proportional to the difference between L2 and L1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911213739.XACN110936898A (en) | 2019-12-02 | 2019-12-02 | Intelligent anti-glare rearview mirror and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911213739.XACN110936898A (en) | 2019-12-02 | 2019-12-02 | Intelligent anti-glare rearview mirror and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025111749A1 (en)* | 2023-11-27 | 2025-06-05 | 深圳市卓驭科技有限公司 | Interior rearview mirror and vehicle |
| WO2025148280A1 (en)* | 2024-01-11 | 2025-07-17 | 深圳市唯酷光电有限公司 | Driving circuit and dimming rearview mirror comprising driving circuit |
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