CN2771890Y - Electro chromic rearview mirror antiglare control device - Google Patents
Electro chromic rearview mirror antiglare control device Download PDFInfo
- Publication number
- CN2771890Y CN2771890Y CN 200520039351 CN200520039351U CN2771890Y CN 2771890 Y CN2771890 Y CN 2771890Y CN 200520039351 CN200520039351 CN 200520039351 CN 200520039351 U CN200520039351 U CN 200520039351U CN 2771890 Y CN2771890 Y CN 2771890Y
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- rearview mirror
- dazzle
- control device
- changeable colour
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Abstract
An electro chromic rearview mirror antiglare control device of the utility model contains a rear-view mirror body. The utility model is characterized in that the utility model also contains a control circuit and a power circuit which provides the control circuit with working. The control circuit contains a CPU, a switch circuit, a reversing signal receiving circuit, an ambient light/ glare sampling circuit, a temperature sampling circuit, an indicator circuit, a drive circuit and a constant-voltage circuit. The output terminals of the switch circuit, the reversing signal receiving circuit, the ambient light/ glare sampling circuit and the temperature sampling circuit are respectively connected with the input terminal of the CPU, the output terminal of which is respectively connected with the input terminals of the indicator circuit and the drive circuit, and the output terminal of the drive circuit is connected with the input terminal of the constant-voltage circuit, the output terminal of which is connected with the rear-view mirror. The utility model has advantages that the voltage of the rear-view mirror can be dynamically steplessly regulated and the reflectivity can be dynamically regulated, and it also has advantages of dispersion of compensation temperature and easy installation and use.
Description
Technical field
The utility model relates to a kind of electricity and causes the changeable colour glareproof mirror, and the electricity that particularly is applied to the vehicles causes the anti-dazzle control device of changeable colour rearview mirror.
Background technology
When vehicle travels at night running or under the faint situation of light, when the rear has strong illumination (as the headlight direct projection of front vehicle) to rearview mirror, can make the vehicle drive personnel produce dazzling dazzling sensation and not see road ahead and cause traffic hazard, for improving this kind situation, numerous manufacturers have developed various electricity and have caused the anti-dazzle control device of changeable colour rearview mirror.
Present known glareproof mirror control device all adopts analog form to go to realize, its main implementation as shown in Figure 1, comprise ambient light sensor 11, glare light sensor 12, and comparer 13, it is the light intensity by a light sensors rear view of vehicle irradiation at the rear that is installed in rearview mirror 10, the light intensity of the sensor detected vehicle surrounding environment light by being installed in the rearview mirror rear, optical sensor is converted into the variation of detected light intensity signal the variation of current signal or resistance signal, tradition glareproof mirror control device changes the variation of these resistance signals or current signal again by the signal that hardware circuit is converted into voltage, the light intensity signal of this two-way and rear irradiation and surround lighting light intensity signal corresponding voltage signal are input to comparer again by certain voltage division processing two input ends, comparer drives late-class circuit to the difference of two-way input signal through certain calculus of differences, be loaded into the voltage change that electricity causes changeable colour rearview mirror two ends thereby make, realize the anti-dazzle function of variable color.And each producer typically uses the function that operational amplifier adds certain peripheral circuit realization comparer.The shortcoming of this use hardware circuit glareproof mirror control device is the hardware circuit complexity, controllability is poor, and it is well-known, existing various optical sensor all varies with temperature its sensing value and changes with temperature, temperature drift is promptly arranged, and existing this mimic channel implementation is difficult to accomplish all temps of sensor and other are done compensation.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned shortcoming and a kind of novel glareproof mirror control device is provided, can not float and allow glareproof mirror produce misoperation owing to the temperature of sensor, allow the rearview mirror control device have the threshold values that surround lighting is set arbitrarily simultaneously and allow rearview mirror have controllability more easily, increase the dirigibility of design.
The technical scheme that the utility model is taked is: electricity causes the anti-dazzle control device of changeable colour rearview mirror, comprise body of backsight mirror, be characterized in, also comprise a control circuit and the power circuit that this control circuit work is provided, described control circuit comprises a CPU, a switch disable circuit, an astern signal receiving circuit, one surround lighting/dazzle sample circuit, a temperature sampling circuit, an indicating circuit, one drive circuit and a constant voltage circuit; The output terminal of described power circuit, on-off circuit, astern signal receiving circuit, surround lighting/dazzle sample circuit and temperature sampling circuit is connected with the input end of CPU respectively, the output terminal of described CPU is connected with the input end of indicating circuit and driving circuit respectively, the output terminal of described driving circuit is connected with the input end of constant voltage circuit, and the output terminal of described constant voltage circuit is connected with rearview mirror;
Described switch disable circuit is set for user's operation, is used to forbid the rearview mirror variable color;
Described astern signal receiving circuit is used for astern signal and single-chip microcomputer Signal Matching;
Described surround lighting, dazzle sample circuit are used for the light intensity signal of sampling is flowed to single-chip microcomputer;
Described temperature sampling circuit provides foundation when being used to CPU to compensate automatically when ambient light and dazzle light intensity;
Described driving circuit be used for control according to single-chip microcomputer require to provide square-wave signal that relevant pulse width modulation signals modulates certain dutycycle drive constant voltage circuit and triode conducting and by;
Described constant voltage circuit is used for producing the needed input operating range of control rearview mirror variable color;
Described indicating circuit is used to show the residing functional status of current control device.
Above-mentioned electricity causes the anti-dazzle control device of changeable colour rearview mirror, and wherein, described rearview mirror is that electricity causes the changeable colour rearview mirror, can change its reflectivity according to the change in voltage that loads thereon.
Above-mentioned electricity causes the anti-dazzle control device of changeable colour rearview mirror; wherein; described power circuit is used for being converted into the needed stable 5V voltage of control circuit connect the voltage come from the automobile storage battery end, mainly is made up of power supply high tension protection circuit and electric source filter circuit and reverse protection circuit and three-terminal voltage-stabilizing integration module.
Above-mentioned electricity causes the anti-dazzle control device of changeable colour rearview mirror, wherein, and described surround lighting, dazzle sample circuit: comprise two optical sensors, a filtering circuit, a bleeder circuit and a current-limiting circuit and form; Each optical sensor detects the light intensity of rear view of vehicle direct projection and the light intensity of surround lighting respectively, and the light intensity signal that is received is converted into voltage signal flows to single-chip microcomputer.
Above-mentioned electricity causes the anti-dazzle control device of changeable colour rearview mirror, and wherein, described CPU is for having power input mouth, clock input/output port, I/O port, the single-chip microcomputer of A/D conversion PWM output function.
Above-mentioned electricity causes the anti-dazzle control device of changeable colour rearview mirror, and wherein, described switch disable circuit mainly is made up of pull-down circuit, filtering circuit and triode.
Above-mentioned electricity causes the anti-dazzle control device of changeable colour rearview mirror, and wherein, described astern signal receiving circuit mainly is made up of bleeder circuit, filtering circuit and current-limiting resistance.
Above-mentioned electricity causes the anti-dazzle control device of changeable colour rearview mirror, and wherein, described driving circuit mainly is made up of the I/O mouth of single-chip microcomputer, transistor amplifier etc.
Above-mentioned electricity causes the anti-dazzle control device of changeable colour rearview mirror, and wherein, described temperature sampling circuit mainly is made up of temperature sensor and bleeder circuit and filtering circuit.
Above-mentioned electricity causes the anti-dazzle control device of changeable colour rearview mirror, and wherein, described constant voltage circuit mainly is made up of operational amplifier, triode and biasing resistor.
Above-mentioned electricity causes the anti-dazzle control device of changeable colour rearview mirror, it is characterized in that, described indicating circuit mainly is made up of current-limiting resistance and light emitting diode.
Because the utility model adopts digital form control rearview mirror anti-dazzle, adopted the software control of single-chip microcomputer, by each dazzle of single-chip microcomputer Direct Sampling, surround lighting and temperature signal, adopt the variation of software pulse-width modulated output signal, control loaded causes voltage on the changeable colour rearview mirror at electricity, make all operations carry out with the software digital form, shortcomings such as the circuit complexity of having avoided producing, debugging complexity, but and the voltage with rearview mirror dynamically step-less adjustment, reflectivity dynamic adjustments, compensate for temperature drift and advantage easy to install with pure hardware mode.
Description of drawings
Concrete structure of the present utility model is further provided by following embodiment and accompanying drawing thereof.
Fig. 1 is the function block schematic diagram of existing glareproof mirror control device.
Fig. 2 is the electric block diagram of the utility model glareproof mirror control device.
Fig. 3 is the electronic-circuit diagram of a kind of embodiment of the utility model glareproof mirror control device.Wherein: a is a main circuit, and b is a power circuit.
Embodiment
See also Fig. 2.The utility model electricity causes the anti-dazzle control device of changeable colour rearview mirror, comprises body of backsight mirror, and this rearview mirror is that electricity causes the changeable colour rearview mirror, can change its reflectivity according to the change in voltage that loads thereon.It is rearview mirrors that wherein contain the electrochemical substance formation that electricity causes changeable colour rearview mirror composition 10.It can change reflectivity automatically according to the voltage that loads thereon.The electricity that can use MAGANA company or GENTAX company or other companies to produce causes the changeable colour rearview mirror.
Also comprise a control circuit 100 and the power circuit 2 that this control circuit work is provided.This control circuit comprises a CPU1, a switch disable circuit 3, an astern signal receiving circuit 4, one surround lighting/dazzle sample circuit 5, a temperature sampling circuit 6, an indicating circuit 9, one drive circuit 7 and a constant voltage circuit 8.The output terminal of on-off circuit, astern signal receiving circuit, surround lighting/dazzle sample circuit and temperature sampling circuit is connected with the input end of CPU respectively, the output terminal of CPU is connected with the input end of indicating circuit and driving circuit respectively, the output terminal of driving circuit is connected with the input end of constant voltage circuit, and the output terminal of constant voltage circuit is connected with rearview mirror.
In the utility model,
CPU1 is the single-chip microcomputer with functions such as power input mouth, clock input/output port, I/O port, A/D conversion, PWM outputs, it is the core of The whole control device, after the digital signal that its processing obtains through analog-to-digital conversion is carried out certain software calculation process, the output control signal, control loaded is in the variation of the voltage at rearview mirror two ends.Receive the variation of ambient temperature simultaneously.The light intensity signal that is received is carried out certain correction-compensation.
Switch disable circuit 3 is to introduce by causing the switch terminals that the anti-dazzle control device of changeable colour rearview mirror is connected with electricity, through pull-down circuit and filtering circuit, is connected with the I/O interface of single-chip microcomputer then, and reliable extraction external switch signal also is connected with interface microcontroller.On-off circuit is set for user's operation, after the user presses switch, forbids the rearview mirror variable color; And when switch when last, allow the rearview mirror variable color.
Astern signal receiving circuit 4 is by introducing with reversing astern signal input end, carry out level through triode resistance and transform the I/O interface that adds filtering circuit and single-chip microcomputer again and be connected, its circuit is to realize the reliable extraction of outside astern signal and its signal is carried out corresponding conversion being connected with the fiducial level signal of interface microcontroller realizing.Because astern signal and single-chip microcomputer signal do not match, need to carry out circuit conversion through this astern signal conversion circuit; The purpose of astern signal is can close the variable color that electricity causes the changeable colour rearview mirror automatically after whole rearview mirror control device receives the reversing automobile signal;
Surround lighting, dazzle sample circuit 5 be by with glare light sensor and environment close that sensor is connected divider resistance resulting light signal is converted into electric signal, two A/D thief hatchs by filtering circuit and single-chip microcomputer are connected again provides dazzle and surround lighting parameter for single-chip microcomputer.It comprises two optical sensors, and optical sensor is converted into resistance signal or current signal to the light intensity signal that is received.The light intensity of light sensors rear view of vehicle direct projection and the light intensity of surround lighting, this circuit is converted into voltage signal to the light intensity signal of these samplings again and flows to single-chip microcomputer.
Constant voltage circuit 8 is that stable electricity causes the input operating range that the changeable colour rearview mirror carries out work for driving circuit provides reliably.It is by forming with the peripheral circuit that triode that integrated computing is sent out device big and is connected is connected with resistance.It is a voltage generation circuit, and the voltage that this circuit is imported by power supply produces the needed maximum controlling voltage of rearview mirror after passing through certain conversion.
Indicating circuit 9 shows the residing functional status of current control device, is in running order or dormant state.
See also Fig. 3.This is the electronic-circuit diagram of a kind of embodiment of the utility model control circuit.The utility model mainly is made up of CPU1 and power circuit and amplifier module and peripheral circuit that some are connected with it.Single-chip microcomputer has been selected the single-chip microcomputer of MICROCHIP company for use, and also optional usefulness has other singlechip chips identity function or other manufacturers.
Prohibiting function on-off circuit 3 is introduced by the switch terminals of glareproof mirror, through current-limiting resistance R16, filter capacitor C5 and be connected to No. 2 PTA5 pins of single-chip microcomputer.
Astern signal receiving circuit 4 is introduced by the astern signal input end, through current-limiting resistance R18, filter capacitor C7, be connected to the base stage of triode Q6, the collector of triode links to each other with the output 5V power supply of power circuit by resistance R 19, its emitter is connected with resistance R 16, also inserts No. 2 pin PTA5 of single-chip microcomputer.
The ambient light sensor CDS1 that surround lighting, dazzle sample circuit 5 are linked to each other by the 5V power supply with power circuit output, by divider resistance R13 dividing potential drop, the circuit that links to each other with the PTA0 pin of single-chip microcomputer through resistance R 17, capacitor C 4 constitutes again; Glare sensor CDS2 one end links to each other with the output 5V power supply of power circuit, and the other end links to each other with divider resistance R14, and the PTA1 pin of process resistance R 15, capacitor C 6 and single-chip microcomputer links to each other.
Temperature sensor PTC1, divider resistance R11, current-limiting resistance R12 that temperature sampling circuit 6 is mainly linked to each other by the 5V power supply with power circuit output and the capacitor C 3 that is connected with No. 3 pin PTA3 of single-chip microcomputer constitute, the signal that temperature sensor obtains is after divider resistance R11 dividing potential drop, pass through current-limiting resistance R12 current limliting again, No. 3 pin PTA3 by capacitor C 3 connection single-chip microcomputers are transferred to single-chip microcomputer.
Constant voltage circuit 8 mainly by computing send out device U1 big, triode Q5, Q4 and constitute with resistance R 9, R8 that computing is sent out device U1 in-phase end big and linked to each other.The output terminal that device U1 is sent out in computing big links to each other with resistance R 7, and the other end of R7 and the base stage of triode Q5, the emitter of Q4 link to each other.The grounded emitter of triode Q4, base stage links to each other with resistance R 3, R4.The another one electrode that end of oppisite phase, the electricity that device U1 is sent out in the emitter of triode Q5 and R4, computing big causes the changeable colour rearview mirror links to each other, and its collector connects the 5V power supply.
The resistance R 10 that indicating circuit 9 is connected by single-chip microcomputer pin 4 port PTA3 connects LED 1 and constitutes.
Principle of work of the present utility model is:
After the BATTERY+ of power circuit and ground end began to power on to control device, the oscillator of single-chip microcomputer inside began starting of oscillation, and the utility model control device is initially located in duty.
The utility model control device can switch between two kinds of duties, and a kind of duty is the STOP pattern, and another is the RUN pattern.
The utility model control device all is being in the STOP pattern under general situation, have only after disable switch S1 opens, and promptly detects pin PTA5 pin for being when hanging down first when single-chip microcomputer, and single-chip microcomputer transfers the RUN pattern to by the STOP pattern.
The utility model control device is opened the back control device in anti-dazzle function and is in the RUN pattern, and to detect PTA5 be even number time when low when single-chip microcomputer, single-chip microcomputer from RUN pattern wait several seconds after, close all output functions earlier, enter the STOP pattern.And if to detect PTA5 be odd number time when low when single-chip microcomputer, single-chip microcomputer or from the stop pattern, wake up, and no longer enter the stop pattern.Perhaps be in the RUN pattern always.
When single-chip microcomputer detects PTA5 is after odd number is low pulse or level signal, single-chip microcomputer is in the RUN pattern, it is shinny and detect the A/D sampled value of PTA0, PTA4 and PTA1 pin at first to drive the pilot lamp diode, environment temperature around according to detected corresponding surround lighting, dazzle value being again, calculating should be controlled inputs to the reflectivity that electricity causes the changeable colour rearview mirror, according to calculating, export the triode Q1 of the square wave control Driver Circuit of corresponding dutycycle, the opening and closing of Q2, obtain corresponding rearview mirror reflectivity.
To detect PTA5 be even number time when low when single-chip microcomputer, single-chip microcomputer at first enters the RUN pattern from the state of front, close all measuring abilities then and drive function, the diode pilot lamp goes out, enter the STOP pattern from the RUN pattern, and wait for waking up of switch S 1, during this, single-chip microcomputer is not done any operation again.
The utility model has been realized following function:
1. electricity causes the anti-dazzle function of changeable colour rearview mirror variable color;
2. glareproof mirror switch prohibiting function;
3. the glareproof mirror anti-dazzle prohibiting function of moveing backward;
4. optical sensor temperature compensation function; And
5. anti-dazzle state deixis.
Claims (10)
1, electricity causes the anti-dazzle control device of changeable colour rearview mirror, comprise body of backsight mirror, it is characterized in that, also comprise a control circuit and the power circuit that this control circuit work is provided, described control circuit comprises a CPU, a switch disable circuit, an astern signal receiving circuit, one surround lighting/dazzle sample circuit, a temperature sampling circuit, an indicating circuit, one drive circuit and a constant voltage circuit; The output terminal of described on-off circuit, astern signal receiving circuit, surround lighting/dazzle sample circuit and temperature sampling circuit is connected with the input end of CPU respectively, the output terminal of described CPU is connected with the input end of indicating circuit and driving circuit respectively, the output terminal of described driving circuit is connected with the input end of constant voltage circuit, and the output terminal of described constant voltage circuit is connected with rearview mirror;
Described switch disable circuit is set for user's operation, is used to forbid the rearview mirror variable color;
Described astern signal receiving circuit is used for astern signal and single-chip microcomputer Signal Matching;
Described surround lighting, dazzle sample circuit are used for the light intensity signal of sampling is flowed to single-chip microcomputer;
Described temperature sampling circuit provides foundation when being used to CPU to compensate automatically when ambient light and dazzle light intensity;
Described driving circuit be used for control according to single-chip microcomputer require to provide square-wave signal that relevant pulse width modulation signals modulates certain dutycycle drive constant voltage circuit and triode conducting and by;
Described constant voltage circuit is used for producing control rearview mirror variable color necessary operations voltage;
Described indicating circuit is used to show the residing functional status of current control device.
2, electricity according to claim 1 causes the anti-dazzle control device of changeable colour rearview mirror, it is characterized in that, described rearview mirror is that electricity causes the changeable colour rearview mirror, can change its reflectivity according to the change in voltage that loads thereon.
3, electricity according to claim 1 causes the anti-dazzle control device of changeable colour rearview mirror; it is characterized in that; described power circuit is used for being converted into the needed stable 5V voltage of control circuit connect the voltage come from the automobile storage battery end, mainly is made up of power supply high tension protection circuit and electric source filter circuit and reverse protection circuit and three-terminal voltage-stabilizing integration module.
4, electricity according to claim 1 causes the anti-dazzle control device of changeable colour rearview mirror, it is characterized in that described surround lighting, dazzle sample circuit: comprise two optical sensors, a filtering circuit, a bleeder circuit and a current-limiting circuit and form; Two optical sensors detect the light intensity of rear view of vehicle direct projection and the light intensity of surround lighting respectively, and the light intensity signal that is received is converted into voltage signal flows to single-chip microcomputer.
5, electricity according to claim 1 causes the anti-dazzle control device of changeable colour rearview mirror, it is characterized in that, described CPU is for having power input mouth, clock input/output port, I/O port, the single-chip microcomputer of A/D conversion PWM output function.
6, electricity according to claim 1 causes the anti-dazzle control device of changeable colour rearview mirror, it is characterized in that, described switch disable circuit mainly is made up of pull-down circuit, filtering circuit and triode.
7, electricity according to claim 1 causes the anti-dazzle control device of changeable colour rearview mirror, it is characterized in that, described astern signal receiving circuit mainly is made up of bleeder circuit, filtering circuit and current-limiting resistance.
8, electricity according to claim 1 causes the anti-dazzle control device of changeable colour rearview mirror, it is characterized in that, described driving circuit mainly is made up of the I/O mouth of single-chip microcomputer, transistor amplifier etc.
9, electricity according to claim 1 causes the anti-dazzle control device of changeable colour rearview mirror, it is characterized in that, described temperature sampling circuit mainly is made up of temperature sensor and bleeder circuit and filtering circuit.
10, electricity according to claim 1 causes the anti-dazzle control device of changeable colour rearview mirror, it is characterized in that, described constant voltage circuit mainly is made up of operational amplifier, triode and biasing resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520039351 CN2771890Y (en) | 2005-01-31 | 2005-01-31 | Electro chromic rearview mirror antiglare control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520039351 CN2771890Y (en) | 2005-01-31 | 2005-01-31 | Electro chromic rearview mirror antiglare control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2771890Y true CN2771890Y (en) | 2006-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520039351 Expired - Fee Related CN2771890Y (en) | 2005-01-31 | 2005-01-31 | Electro chromic rearview mirror antiglare control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2771890Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101954884A (en) * | 2009-07-13 | 2011-01-26 | 张家荣 | Anti-dazzle vehicle interior mirror system with composite information display |
| CN105128747A (en) * | 2015-09-24 | 2015-12-09 | 惠州华阳通用电子有限公司 | Control method and device for interior mirror |
| CN108263284A (en) * | 2018-03-28 | 2018-07-10 | 杭州星通电子科技有限公司 | Outside rear-view mirror driving circuit in electronics automatic anti-glare |
| CN108819850A (en) * | 2018-07-05 | 2018-11-16 | 深圳市麦道微电子技术有限公司 | A kind of full-automatic anti-dazzle inner back mirror of novel low-cost |
| CN109367485A (en) * | 2018-09-30 | 2019-02-22 | 惠州市德赛西威汽车电子股份有限公司 | A kind of anti-dazzle driving mirror driving circuit of adjustable transparency |
| CN110858047A (en) * | 2018-08-23 | 2020-03-03 | 深圳市麦道微电子技术有限公司 | Control system for quick color change of EC (EC) lens during backing |
-
2005
- 2005-01-31 CN CN 200520039351 patent/CN2771890Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101954884A (en) * | 2009-07-13 | 2011-01-26 | 张家荣 | Anti-dazzle vehicle interior mirror system with composite information display |
| CN105128747A (en) * | 2015-09-24 | 2015-12-09 | 惠州华阳通用电子有限公司 | Control method and device for interior mirror |
| CN108263284A (en) * | 2018-03-28 | 2018-07-10 | 杭州星通电子科技有限公司 | Outside rear-view mirror driving circuit in electronics automatic anti-glare |
| CN108819850A (en) * | 2018-07-05 | 2018-11-16 | 深圳市麦道微电子技术有限公司 | A kind of full-automatic anti-dazzle inner back mirror of novel low-cost |
| CN110858047A (en) * | 2018-08-23 | 2020-03-03 | 深圳市麦道微电子技术有限公司 | Control system for quick color change of EC (EC) lens during backing |
| CN109367485A (en) * | 2018-09-30 | 2019-02-22 | 惠州市德赛西威汽车电子股份有限公司 | A kind of anti-dazzle driving mirror driving circuit of adjustable transparency |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |