CN110858047B - Control system for quick color change of EC lens during backing - Google Patents
Control system for quick color change of EC lens during backing Download PDFInfo
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- CN110858047B CN110858047B CN201810967869.1A CN201810967869A CN110858047B CN 110858047 B CN110858047 B CN 110858047B CN 201810967869 A CN201810967869 A CN 201810967869A CN 110858047 B CN110858047 B CN 110858047B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/163—Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor
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- 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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention provides a control system for fast color changing of an EC lens during backing, which comprises the EC lens, an MCU module, a backing signal detection module, a control conversion module, an EC lens control voltage module and a voltage reversing module, when backing a car, when the backing signal detection module detects a backing signal, the backing signal detection module sends the backing signal to the MCU module, the MCU module controls the control conversion module to output a connecting voltage and acts on the EC mirror control voltage module, the EC mirror control voltage module regulates the received voltage and outputs the voltage into low-voltage large current to be transmitted to the voltage reversing module, the voltage reversing module controls the polarity of the low-voltage large current to be reversed and applied to the EC mirror, after 1 second, the MCU module controls the voltage reversing module to be disconnected from the EC lens, the EC lens is rapidly changed from the state of the lowest reflectivity to the state of the highest reflectivity, and the time from the detection of the reversing signal to the completion of the rapid color change of the EC lens is within 2 seconds.
Description
Technical Field
The invention relates to the field of EC lens control, in particular to a control system for quickly changing color of an EC lens during backing.
Background
The EC lens for the vehicle on the market at present has the function of quickly changing color when backing the vehicle. They are usually implemented by actively detecting the reverse signal, and once switching to the reverse state, the EC mirror can be switched to the high reflectivity state quickly even though the EC mirror is currently in the lowest reflectivity state. An EC mirror is an electrochromic material that begins to change color and reduce reflectivity upon application of a voltage; once the applied voltage is removed, the material begins an inverse process, returning to a non-discoloring state where the reflectance is highest. The EC mirror is an extremely slow component to react. To speed up the time for the EC lens to return rapidly from the lowest reflectivity to the highest reflectivity, most current state of the art controls simply by removing the dc voltage applied to the EC lens, typically requiring 6-8 seconds of response time to return to the highest reflectivity. The time spent by the control mode is longer, the development direction of the automobile is more comfortable, safer and more intelligent, and the design obviously has huge improvement space, so that a control system of the EC lens capable of changing the color rapidly during backing is needed, the time spent by the EC lens changing the color is reduced, and more comfortable driving experience is brought to a driver.
Disclosure of Invention
In order to solve the problems, the invention provides a control system for quickly changing the color of an EC lens during backing.
The invention is realized by the following technical scheme:
the invention provides a control system for quick color change of an EC lens during backing, which comprises:
an EC lens, wherein application of different voltages across the EC lens causes the EC lens to rapidly change color, thereby changing the reflectivity of the EC lens;
the MCU module is used for controlling a control system for quickly changing color of the EC lens during reversing;
the reversing signal detection module is electrically connected with the MCU module and is used for detecting a reversing signal and sending the reversing signal to the MCU module;
the control conversion module is electrically connected with the MCU module, and the MCU module controls the output voltage of the control conversion module so that the voltage of the control conversion module is continuously adjustable;
the EC mirror control voltage module is electrically connected with the control conversion module and can receive the voltage transmitted by the control conversion module, convert the voltage into low voltage and simultaneously increase the output current into low-voltage large current;
the voltage reversing module is electrically connected with the MCU module, the EC mirror control voltage module and the EC mirror piece respectively, and is used for receiving the low-voltage large current transmitted by the EC mirror control voltage module, reversing the polarity of the low-voltage large current and applying the low-voltage large current to the EC mirror piece;
when backing a car, the EC lens is in the state of lowest reflectivity, when the backing signal detection module detects a backing signal, the backing signal detection module sends the backing signal to the MCU module, the MCU module controls the control conversion module to output continuously adjustable voltage and act on the EC lens control voltage module, the EC lens control voltage module adjusts the received continuously adjustable voltage and outputs the voltage into low-voltage large current and transmits the low-voltage large current to the voltage reversing module, the voltage reversing module controls the polarity of the low-voltage large current to be reversed and applied to the EC lens, after 1 second, the MCU module controls the voltage reversing module to be disconnected from the electric connection with the EC lens, the EC lens can be quickly converted into the state of highest reflectivity from the state of lowest reflectivity, thereby realizing the quick color change of the EC lens, the time from detection of the reverse signal to completion of the rapid color change of the EC lens is within 2 seconds.
Further, the voltage output by the control conversion module is 0V-3.3V, and the output voltage of the EC mirror control voltage module is below 1.2V.
Further, the voltage commutation module comprises an H-bridge formed by 4 MOS transistors.
Further, the control system for the rapid color change of the EC lens during the reversing process further comprises a DC-DC device, and the DC-DC device is used for providing a continuous and stable power supply for the control system for the rapid color change of the EC lens.
Further, the control system that EC lens discolours fast when backing a car still includes first integrated optical sensor and second integrated optical sensor that respectively with the MCU module electricity is connected, first integrated optical sensor with the interference of interchange modulation type light source to ambient light detection can be resisted to the second integrated optical sensor, first integrated optical sensor is used for detecting the ambient light of plantago side, second integrated optical sensor states and is used for detecting the vehicle light behind the car.
Furthermore, the control system for rapidly changing the color of the EC lens during reversing further comprises a debugging interface, wherein the debugging interface is respectively electrically connected with the MCU module and an external communication interface, and the debugging interface is used for completing level conversion of the MCU module and the communication interface.
The invention has the beneficial effects that:
the control system for quickly changing the color of the EC lens during reversing applies the polarity of low-voltage large current to the EC lens after reversing the polarity of the low-voltage large current through the voltage reversing module, and the low-voltage large current is cancelled after being applied reversely for 1 second. So that the time for the EC lens to return from the lowest reflectivity to the highest reflectivity is within 2 seconds, which is much faster than the speed of existing EC lenses, which have a reaction speed of 6-8 seconds. The EC lens has quicker color changing speed, improves the use experience of a driver, and makes backing more comfortable and safer.
Drawings
FIG. 1 is a circuit diagram of the reverse signal detection module;
FIG. 2 is a circuit diagram of the MCU module;
FIG. 3 is a circuit diagram of the voltage commutation module;
FIG. 4 is a circuit diagram of the debug interface;
fig. 5 is a schematic block diagram of the control system for rapidly changing color of the EC lens when the vehicle is reversed.
Detailed Description
In order to more clearly and completely explain the technical scheme of the invention, the invention is further explained with reference to the attached drawings.
Referring to fig. 1 to 5, the present invention provides a control system for fast color changing of an EC lens during reversing, including:
an EC lens 60, application of different voltages across the EC lens 60 causes rapid electrochromic of the EC lens 60, thereby changing the reflectivity of the EC lens 60.
The MCU module 10 is used for controlling a control system for quickly changing color of the EC lens during reversing;
the reversing signal detection module 20 is electrically connected with the MCU module 10, and the reversing signal detection module 20 is used for detecting a reversing signal and sending the reversing signal to the MCU module 10;
the control conversion module 30, the control conversion module 30 is electrically connected with the MCU module 10, and the MCU module 10 controls the output voltage of the control conversion module 30, so that the voltage of the control conversion module 30 is continuously adjustable;
the EC mirror control voltage module 40 is electrically connected with the control conversion module 30, and the EC mirror control voltage module 40 can receive the voltage transmitted by the control conversion module 30, convert the voltage into low voltage, and increase the output current into low-voltage large current;
and the voltage reversing module 50 is electrically connected with the MCU module 10, the EC mirror control voltage module 40 and the EC mirror 60, respectively, and the voltage reversing module 50 is configured to receive the low-voltage large current transmitted by the EC mirror control voltage module 40, reverse the polarity of the low-voltage large current, and apply the polarity of the low-voltage large current to the EC mirror 60.
In this embodiment, the EC lens 60 is made of an electrochromic material, so that the reflectivity of the EC lens 60 can be changed by changing the input voltage across the EC lens 60.
Referring to fig. 2, the software function of the control system for fast color changing of the EC lens during reversing is implemented by the U2 part of the MCU module 10. The program of the MCU module 10 can be burned by a SWUT pin (pin 4 of the MCU in fig. 2) in a single line, so as to realize the online upgrade operation of the control system for rapidly changing color of the EC lens during the reverse operation; power supply abnormality in the program upgrading process cannot cause the upgrading mechanism to fail. The system can be powered up again to perform the upgrade operation again.
Referring to fig. 1 and fig. 2, the reverse signal detecting module 20 forms an I/O reverse signal detecting circuit through a triode Q2. A reverse signal input from an external connector is input to a 7 th pin of a U2 part in the MCU module 10 through a level and polarity conversion circuit of a triode Q2; the MCU module 10 reads a low level to indicate that the reverse signal is valid, and the program will execute a 200ms anti-shake process. Meanwhile, the MCU module 10 sends a continuously adjustable PMW signal and transmits the signal to the control transform module 30.
Referring to fig. 5, the control conversion module 30 is a filter circuit, the MCU module 10 sends a PWM signal and transmits the PWM signal to the control conversion module 30, and the control conversion module 30 can receive the PMW signal and perform filtering processing to form a stable and adjustable dc control voltage.
The EC mirror control voltage module 40 is a DC-DC component, the MCU module 10 sends a PWM signal and transmits the PWM signal to the control converter module 30, and after filtering, the voltage output by the control converter module 30 is 0V-3.3V, and needs a lower control voltage (less than or equal to 1.2V) and a higher current to drive the EC mirror 60, so the EC mirror control voltage module 40 converts the DC control voltage transmitted from the control converter module 30 at 0-3.3V to less than 1.2V to stably output a high low-voltage current of 800MA, and thus the EC mirror control voltage module 40 can easily drive three EC mirrors (two external mirrors + one internal mirror).
When backing up, the EC lens is in the state of lowest reflectivity, when the backing signal detection module 20 detects a backing signal, the backing signal detection module 20 sends the backing signal to the MCU module 10, the MCU module 10 outputs a PWM signal and outputs a continuously adjustable dc control voltage through the control conversion module 30 to act on the EC lens control voltage module 40, the EC lens control voltage module 40 adjusts the received continuously adjustable dc large voltage to output a low voltage large current and transmits the low voltage large current to the voltage commutation module 50, the voltage commutation module 50 controls the polarity of the low voltage large current to be reversed and applied to the EC lens 60, after 1 second, the MCU module 10 controls the voltage commutation module 50 to disconnect the electrical connection with the EC lens 60, and the EC lens 60 can be rapidly converted from the state of lowest reflectivity to the state of highest reflectivity, thereby realizing the rapid color change of the EC lens 60, and the time from the detection of the reversing signal to the completion of the rapid color change of the EC lens 60 is within 2 seconds. Therefore, the control system for quickly changing the color of the EC lens during reversing has the advantages of simple structure and high reaction speed, and the reversing experience of a driver is improved.
Preferably, referring to fig. 3, the voltage commutation module 50 includes an H-bridge composed of 4 MOS transistors. Specifically, four MOS transistors Q12, Q17, Q18 and Q19 form an H-bridge, and are controlled by the 11 th pin and the 13 th pin of the MCU module 10, so that the polarity inversion control of the voltage applied to the EC lens 60 can be implemented. The two electrodes of the EC lens 60 are respectively wired to pins of an external connector. Since the EC lens 60 requires a control voltage of less than 1.2V, an integrated H-bridge device cannot be used, but a separate element is required to form an H-bridge to achieve a relatively low power supply voltage control. This is also one of the innovative points of the present invention. The power supply of the H-bridge can be controlled by the transistor Q23, and without the H-bridge, the switching circuit consisting of Q23 alone cannot achieve polarity control of the EC lens control voltage, but can achieve on and off control.
Preferably, referring to fig. 1 and 5, the control system for rapidly changing color of the EC lens during reversing further includes a DC-DC device 70, and the DC-DC device 70 is used to provide a continuously stable power source for the control system for rapidly changing color of the EC lens 60. The DC-DC device 70 is connected to an ACC (power source for an automobile), that is, an engine power source of an automobile, as a power supply input of the present invention, the DC-DC device can output a stable power voltage of 3.3V.
Preferably, referring to fig. 5, the control system for EC lens fast color change during reverse further includes a first integrated optical sensor 80 and a second integrated optical sensor 90 electrically connected to the MCU module 10, respectively, the first integrated optical sensor 80 and the second integrated optical sensor 90 can resist interference of an ac modulation light source to ambient light detection, the first integrated optical sensor 80 is used for detecting ambient light at a front side of the vehicle, and the second integrated optical sensor 90 is used for detecting vehicle light at a rear side of the vehicle.
Preferably, referring to fig. 1 and 5, the control system for quickly changing color of the EC lens during reversing further includes a debugging interface 100, the debugging interface 100 is electrically connected to the MCU module 10 and an external communication interface, respectively, and the debugging interface 100 is used to complete level conversion between the MCU module 10 and the communication interface. Specifically, the debug interface 100 is input to the 18 th and 19 th pins of the MCU (U2), the debug interface 100 conforms to the standard of UART (universal serial data bus), and in the design stage, the debug interface 100 can enable the PC to obtain the sensor information or other related status information from the MCU module 10; the system can also be used as an interface for communicating with an upper computer of an automobile, and the upper computer can acquire information of the EC lens 60 terminal or control the EC lens 60.
Of course, the present invention may have other embodiments, and based on the embodiments, those skilled in the art can obtain other embodiments without any creative effort, and all of them are within the protection scope of the present invention.
Claims (6)
1. The utility model provides a control system that EC lens discoloured fast when backing a car which characterized in that includes:
an EC lens, wherein application of different voltages across the EC lens causes the EC lens to rapidly change color, thereby changing the reflectivity of the EC lens;
the MCU module is used for controlling a control system for quickly changing color of the EC lens during reversing;
the reversing signal detection module is electrically connected with the MCU module and is used for detecting a reversing signal and sending the reversing signal to the MCU module;
the control conversion module is electrically connected with the MCU module, and the MCU module controls the output voltage of the control conversion module so that the voltage of the control conversion module is continuously adjustable;
the EC mirror control voltage module is electrically connected with the control conversion module and can receive the voltage transmitted by the control conversion module, convert the voltage into low voltage and simultaneously increase the output current into low-voltage large current;
the voltage reversing module is electrically connected with the MCU module, the EC mirror control voltage module and the EC mirror piece respectively, and is used for receiving the low-voltage large current transmitted by the EC mirror control voltage module, reversing the polarity of the low-voltage large current and applying the low-voltage large current to the EC mirror piece;
when backing a car, the EC lens is in the state of lowest reflectivity, when the backing signal detection module detects a backing signal, the backing signal detection module sends the backing signal to the MCU module, the MCU module controls the control conversion module to output continuously adjustable voltage and act on the EC lens control voltage module, the EC lens control voltage module adjusts the received continuously adjustable voltage and outputs the voltage into low-voltage large current and transmits the low-voltage large current to the voltage reversing module, the voltage reversing module controls the polarity of the low-voltage large current to be reversed and applied to the EC lens, after 1 second, the MCU module controls the voltage reversing module to be disconnected from the electric connection with the EC lens, the EC lens can be quickly converted into the state of highest reflectivity from the state of lowest reflectivity, thereby realizing the quick color change of the EC lens, the time from detection of the reverse signal to completion of the rapid color change of the EC lens is within 2 seconds.
2. The control system for the rapid color change of the EC lens during the reversing according to claim 1, wherein the voltage output by the control conversion module is 0V-3.3V, and the output voltage of the EC lens control voltage module is below 1.2V.
3. The control system for EC lens rapid color change during backing up according to claim 1, wherein the voltage commutation module comprises an H bridge composed of 4 MOS tubes.
4. The control system for rapidly changing color of the EC lens during reversing according to claim 1, wherein the control system for rapidly changing color of the EC lens during reversing further comprises a DC-DC device, and the DC-DC device is used for providing a continuous and stable power supply for the control system for rapidly changing color of the EC lens during reversing.
5. The control system for rapidly changing color of the EC lens during the reversing according to claim 1, further comprising a first integrated optical sensor and a second integrated optical sensor electrically connected to the MCU module respectively, wherein the first integrated optical sensor and the second integrated optical sensor can resist the interference of the AC modulation light source to the detection of the ambient light, the first integrated optical sensor is used for detecting the ambient light at the front side of the vehicle, and the second integrated optical sensor is used for detecting the light of the vehicle in the rear direction of the vehicle.
6. The control system for rapidly changing color of the EC lens during the reversing according to claim 1, wherein the control system for rapidly changing color of the EC lens during the reversing further comprises a debugging interface, the debugging interface is electrically connected with the MCU module and an external communication interface respectively, and the debugging interface is used for completing the level conversion of the MCU module and the communication interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810967869.1A CN110858047B (en) | 2018-08-23 | 2018-08-23 | Control system for quick color change of EC lens during backing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810967869.1A CN110858047B (en) | 2018-08-23 | 2018-08-23 | Control system for quick color change of EC lens during backing |
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| CN110858047A CN110858047A (en) | 2020-03-03 |
| CN110858047B true CN110858047B (en) | 2022-05-10 |
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| CN117087540B (en) * | 2023-10-17 | 2024-01-19 | 宁波铼康光电有限公司 | Anti-glare rearview mirror for vehicle |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5493898A (en) * | 1997-01-09 | 1998-08-03 | Donnelly Mirrors Limited | A vehicle rearview mirror and a vehicle control system incorporating such mirror |
| ES2232319B1 (en) * | 2004-10-15 | 2006-08-16 | Fico Mirrors, S.A. | METHOD OF CONTROL OF AN ELECTROCHROMIC MIRROR AND ELECTROCHROMICAL SYSTEM, APPLICABLE TO A MOTOR VEHICLE. |
| CN2771890Y (en) * | 2005-01-31 | 2006-04-12 | 麦格纳唐纳利(上海)汽车系统有限公司 | Electro chromic rearview mirror antiglare control device |
| CN200993676Y (en) * | 2006-11-10 | 2007-12-19 | 白云飞 | Automobile anti-dazzling inside rearview mirror |
| CN201240334Y (en) * | 2008-07-21 | 2009-05-20 | 广东铁将军防盗设备有限公司 | Automatic anti-dazzle control circuit for rearview mirror integrated with reverse radar display |
| CN101738747A (en) * | 2008-11-27 | 2010-06-16 | 麦格纳唐纳利(上海)汽车系统有限公司 | Device for performing anti-dazzle control on rearview mirror with digital EC mirror surface based on LIN bus |
| CN201311527Y (en) * | 2008-11-27 | 2009-09-16 | 麦格纳唐纳利(上海)汽车系统有限公司 | LIN-bus-based antidazzle controlling device of rearview mirror with digital EC mirror surface |
| CN103257503B (en) * | 2013-04-03 | 2015-07-22 | 卢滨洋 | Method for controlling speed of electrochromism of EC mirror planes |
| CN108116322B (en) * | 2016-12-05 | 2024-04-19 | 常州市飞拓模塑有限公司 | Dynamic compensation system and dynamic compensation method for vehicle anti-dazzle lens |
| CN108263284B (en) * | 2018-03-28 | 2024-09-13 | 深圳市艾利凯科技有限公司 | Electronic automatic anti-dazzle inside and outside rear-view mirror driving circuit |
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2018
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