CN105676556A - Environment color self-adaption device and method based on electrochromic device - Google Patents
Environment color self-adaption device and method based on electrochromic device Download PDFInfo
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- CN105676556A CN105676556A CN201610159245.8A CN201610159245A CN105676556A CN 105676556 A CN105676556 A CN 105676556A CN 201610159245 A CN201610159245 A CN 201610159245A CN 105676556 A CN105676556 A CN 105676556A
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/70—SSIS architectures; Circuits associated therewith
- H04N25/76—Addressed sensors, e.g. MOS or CMOS sensors
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Abstract
The invention discloses an environment color self-adaption device based on an electrochromic device. The environment color self-adaption device comprises a CMOS (Complementary Metal Oxide Semiconductor) camera data acquisition module, an SDRAM (Synchronous Dynamic Random Access Memory) data storage module, an FPGA (Field Programmable Gate Array) main control module, a D/A (Digital/Analogue) converter, a constant-current driving circuit, an A/D (Analogue/Digital) converter and the electrochromic device, wherein the electrochromic device is driven by the constant-current driving circuit and voltage at the two ends of the constant-current driving circuit is simultaneously monitored through the A/D converter in real time; when the voltage reaches voltage corresponding to an external environment color, the output of current is switched off by controlling the D/A converter through an FPGA, so that the electrochromic device displays a color consistent with the external environment color. The color self-adaption device disclosed by the invention adopts a constant-current driving manner to drive the electrochromic device; compared with constant-voltage driving, the responding time of the device is effectively shortened and the self-adaption effect is better; color information is acquired by adopting a CMOS camera, and color induction range and distance are wide; the device has the advantages of low power consumption and high integration degree.
Description
Technical field
The present invention relates to a kind of environmental colors self-adaptation device and method, it is specifically related to a kind of environmental colors self-adaptation device based on electrochromic device and self-adaptation method thereof.
Background technology
Electrochromism refers to that stable, reversible change phenomenon occurs the optical properties (reflectivity, transmissivity, specific absorption etc.) of material under the effect of extra electric field, shows as the reversible change of color and transparency in appearance. Electrochromic device has been widely used in the energy-conservation smart windows of electrochromism, automotive rear-view antidazzle mirror and display device etc. in daily life. Under different extra electric field effects, there is, according to electrochromic device, the characteristic that color changes, the color that electrochromic device changes self according to different background environments can be controlled and realize stealthy.
First obtain the colouring information of external environment based on the environmental colors self-adaptation device of electrochromic device, then drive electrochromic device to demonstrate corresponding color according to the colouring information got, thus realize stealthy. At present, extraneous colouring information is obtained based on the environmental colors self-adaptation device of electrochromic device adopts color sensor mostly, then according to the relation searching color and voltage in table, it is applied to the corresponding constant voltage of electrochromic device and makes it show corresponding color. But, although color sensor has the advantage of resolving power height, color selecting able to programme, numeral output, but its single-point photorectifier limits its range of detector, and such detector is subject to the impact of ambient, have to pass through white balance calibration after system reboot, far can not meet the demand of remote color detection; Electrochromic device adopts constant voltage driving mode, owing to electric current can reduce gradually in constant voltage driving process, thus extends the variable color time of device, affects the stealth effect of self-adaptation device.
Summary of the invention
The present invention is directed to the defect that background technology exists, it is proposed that a kind of environmental colors self-adaptation device based on electrochromic device and self-adaptation method thereof. The present invention adopts CMOS camera to obtain colouring information, compares traditional color sensor, and its color induction range and distance are wide, relative ccd sensor its there is advantage low in energy consumption, that integrated level is high;Adopting constant current drive mode to be driven by electrochromic device in self-adaptation device of the present invention, relative to constant voltage driving mode, effectively shorten the time of response of device, self-adaptation effect is better.
The technical scheme of the present invention is as follows:
A kind of environmental colors self-adaptation device based on electrochromic device, comprise CMOS camera data acquisition module, SDRAM data memory module, FPGA master control module, D/A transmodulator, constant-current drive circuit, A/D converter and electrochromic device, wherein, FPGA master control module comprise write FIFO, read FIFO, image pre-processing unit, search table; Described constant-current drive circuit is used for providing constant current to electrochromic device, and arranges two-way switch at its output terminal interface, to control to be applied to the direction of the electric current of electrochromic device;
Buffer memory is carried out through writing FIFO stored in SDRAM data memory module after the graphic information of described CMOS camera data collecting module collected external environment, SDRAM data memory module, by reading FIFO by after the graphic information input picture pretreatment unit process of storage, obtains the color parameter value of external environment color; The input of the color parameter value of external environment color is searched in table, by searching table matching, the voltage parameter value that external environment Color pair is answered can be obtained; Then, FPGA controls D/A transmodulator and exports difference electric current, differential electrical obtains a continuous current after flowing through constant-current drive circuit, by FPGA control two-way switch with realize applying in electrochromic device the sense of current with search table matching after the voltage parameter value that obtains corresponding, thus drive device variable color (when the voltage searching acquisition after table matching is positive voltage, FPGA controls the two-way switch of constant-current drive circuit output terminal interface, applies forward current to electrochromic device; Otherwise, then apply reversible circulation), simultaneously, the voltage at A/D converter Real-Time Monitoring electrochromic device two ends, when this voltage reaches the magnitude of voltage that external environment Color pair is answered, FPGA controls the output that D/A transmodulator cuts off electric current, makes electrochromic device demonstrate the color consistent with external environment color.
Further, the described environmental colors self-adaptation device based on electrochromic device also comprises LCD image display module, for showing the graphic information of the external environment of CMOS camera data collecting module collected.
Further, described table of searching is made up of address wire and data line, FPGA obtains the digital quantity corresponding to the voltage parameter value of data line according to the color parameter value obtained after image pre-processing unit from address wire, and FPGA is according to the positive and negative sense of current controlling electrochromic device and applying of this magnitude of voltage.
Further, described constant-current drive circuit comprises the differential amplifier, amplitude regulating circuit, current sampling circuit and the power MOSFET that connect successively.
Based on an environmental colors self-adaptation method for electrochromic device, comprise the following steps:
Step 1:FPGA controls the graphic information of CMOS camera data collecting module collected external environment, obtains the view data of RGB565 form;
Step 2:FPGA controls SDRAM data memory module and reads FIFO, writes and carry out data transmission between FIFO, by writing, FIFO is stored to SDRAM data memory module to view data step 1 obtained, realize the buffer memory of view data, FPGA control is read FIFO and is read the view data in SDRAM data memory module, and is transferred to image pre-processing unit;
Step 3: the view data received is processed by image pre-processing unit, obtains external environment color, often comprises a lot of color in the graphic information of external environment, it is thus desirable to select topmost color from multiple color, as external environment color; Detailed process is: the matrix that the image received is regarded as a 640*480, removes region, edge, obtains the original matrix of 600*400; Using 20 row in original matrix, 20 row as a look block matrix, then can obtain 30*20 look block matrix; Calculate the rgb value plastisied dispersion of each look block matrix, in certain limit of error, take out the look block matrix that n rgb value plastisied dispersion is minimum, calculate each look block matrix in n the look block matrix taken out rgb value mean value a little, get the look block matrix that in the look block matrix of rgb value similar mean values, plastisied dispersion is minimum rgb value mean value a little, be the rgb value of external environment color;
Step 4: the rgb value parameters input of external environment color step 3 obtained searches table, adopts the matching of look-up tables'implementation color parameter and voltage parameter; It is specially: first the digital quantity corresponding to colors all for electrochromic device and the voltage parameter answered with Color pair is stored in FPGA inside and searches in table, the rgb value of the external environment color that FPGA obtains according to step 3 is from searching the magnitude of voltage obtaining external environment Color pair table and answering, and positive and negative according to this magnitude of voltage, control constant-current drive circuit exports interface and electrochromic device working electrode and to the connection relation between electrode, and then control applies the sense of current in electrochromic device;
Step 5:FPGA controls D/A transmodulator and exports difference electric current, differential electrical obtains a continuous current signal after flowing through constant-current drive circuit, device can be carried out constant-current driving, during the input continuous current of electrochromic device two ends, the absolute value of voltage at device two ends can rise gradually, therefore the voltage simultaneously adopting A/D converter Real-Time Monitoring electrochromic device two ends is needed, when this voltage reaches the magnitude of voltage that external environment Color pair is answered, FPGA controls the output that D/A transmodulator cuts off electric current, makes electrochromic device demonstrate the color consistent with external environment color.
The useful effect of the present invention is:
1, self-adaptation device of the present invention adopts constant current drive mode to be driven by electrochromic device, relative to constant voltage driving mode, effectively shortens the time of response of device, and self-adaptation effect is better.
2, the present invention adopts CMOS camera to obtain colouring information, and it, by the same chip integrated to image array, analogue signal processor, A/D converter, dsp processor, controls picture format and type of transmission by the mode of configuration register; Comparing traditional color sensor, its color induction range and distance are wide, relative ccd sensor its there is advantage low in energy consumption, that integrated level is high; The method that image pre-processing unit of the present invention obtains external environment color parameter value is simple, can obtain color parameter value rapidly and accurately.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention based on the environmental colors self-adaptation device of electrochromic device;
Fig. 2 be the present invention based on original matrix in the environmental colors self-adaptation method steps 3 of electrochromic device to the transition diagram of look block matrix;
Fig. 3 is the schematic circuit of the present invention based on constant-current drive circuit in the environmental colors self-adaptation device of electrochromic device.
Embodiment
A specific embodiment of detail the present invention below.
CMOS camera data acquisition module adopts OV7670CMOS image sensor, and FPGA controls the extraneous graphic information of sensor collection and is decoded as the RGB565 numerary signal for FPGA process; SDRAM adopts the graphic information of the H57V2562GTR buffer memory camera of 256M to carry out follow-up Image semantic classification and image display for FPGA; Control core FPGA adopts EP4CE15F17C8, and it is responsible for the matching of Image semantic classification, color and magnitude of voltage, and coordinates the work of each module; D/A transmodulator adopts AD9708, exports to realize difference electric current; A/D converter adopts AD9280, for the voltage at Real-Time Monitoring electrochromic device two ends; Constant-current drive circuit adopts AD8065 and IRF840S power MOSFET to realize, and as shown in Figure 3, wherein positive-negative power voltage needed for AD8065 is provided by MC34063A; Electrochromic device preferred dimension is the PANI electrochromic device of 20 × 25cm, by to this device detection, when voltage is respectively-1.3V, 0V, 1V, the intermediate state (0V) that the color of electrochromic device is transitioned into light green from the state (-1.3V) of fading of khaki color respectively finally turns into the coloured state of blue-greenish colour (1V), then above-mentioned color and the magnitude of voltage answered with Color pair is stored in and searches in table.
The above-mentioned concrete self-adaptation method based on the environmental colors self-adaptation device of electrochromic device comprises the following steps:
Step 1:FPGA controls the graphic information of CMOS camera data collecting module collected external environment, obtains the view data of RGB565 form;
Step 2:FPGA controls SDRAM data memory module and reads FIFO, writes and carry out data transmission between FIFO, by writing, FIFO is stored to SDRAM data memory module to view data step 1 obtained, realize the buffer memory of view data, FPGA control is read FIFO and is read the view data in SDRAM data memory module, and is transferred to image pre-processing unit;
Step 3: the view data received is processed by image pre-processing unit, obtains external environment color, often comprises a lot of color in the graphic information of external environment, it is thus desirable to select topmost color from multiple color, as external environment color, detailed process is: the matrix that the image received is regarded as a 640*480, removes region, edge, obtains the original matrix of 600*400, using 20 row in original matrix, 20 row as a look block matrix, then can obtain 30*20 look block matrix, calculate the rgb value plastisied dispersion of each look block matrix, in certain limit of error, take out the minimum look block matrix of n rgb value plastisied dispersion (to be specially look block matrix according to rgb value plastisied dispersion order from small to large, then from the look block matrix that rgb value is minimum according to rgb value plastisied dispersion from small to large take out n look block matrix in turn), calculate each look block matrix in n the look block matrix taken out rgb value mean value a little, get the look block matrix that in the look block matrix of rgb value similar mean values, plastisied dispersion is minimum rgb value mean value a little, it is the rgb value of external environment color, owing to different look block matrix has different rgb value mean value, and the rgb value mean value in certain limit of error can regard the rgb value mean value of a kind of color as, can using the look block matrix of the look block matrix of the rgb value mean value in certain limit of error as rgb value similar mean values,
Step 4: the rgb value parameters input of external environment color step 3 obtained searches table, adopts the matching of look-up tables'implementation color parameter and voltage data;It is specially: first the digital quantity corresponding to colors all for electrochromic device and the voltage parameter answered with Color pair is stored in FPGA inside and searches in table, the rgb value of the external environment color that FPGA obtains according to step 3 is from searching the magnitude of voltage obtaining external environment Color pair table and answering, positive and negative according to this magnitude of voltage of FPGA, control constant-current drive circuit exports interface and electrochromic device working electrode and to the connection relation between electrode, and then control applies the sense of current in electrochromic device;
Step 5:FPGA controls D/A transmodulator and exports maximum difference electric current, maximum differential electrical obtains a continuous current signal after flowing through constant-current drive circuit, device can be carried out constant-current driving, during the input continuous current of electrochromic device two ends, the absolute value of voltage at device two ends can rise gradually, therefore the voltage simultaneously adopting A/D converter Real-Time Monitoring electrochromic device two ends is needed, when this voltage reaches the magnitude of voltage that external environment Color pair is answered, FPGA controls the output that D/A transmodulator cuts off electric current, electrochromic device is made to demonstrate the color consistent with external environment color.
The embodiment of the present invention adopts constant current drive mode to be driven by electrochromic device, the response device time is approximately 15s, and when adopting constant voltage mode to drive, the response device time then needs the long period (20s) just can tend towards stability, and therefore constant current drive mode effectively reduces the time of response of PANI electrochromic device.
Claims (5)
1. the environmental colors self-adaptation device based on electrochromic device, comprise CMOS camera data acquisition module, SDRAM data memory module, FPGA master control module, D/A transmodulator, constant-current drive circuit, A/D converter and electrochromic device, wherein, FPGA master control module comprises and writes FIFO, reads FIFO, image pre-processing unit and search table;
Buffer memory is carried out through writing FIFO stored in SDRAM data memory module after the graphic information of described CMOS camera data collecting module collected external environment, SDRAM data memory module, by reading FIFO by after the graphic information input picture pretreatment unit process of storage, obtains the color parameter value of external environment color; The input of the color parameter value of external environment color is searched in table, by searching table matching, the voltage parameter value that external environment Color pair is answered can be obtained; FPGA controls D/A transmodulator and exports difference electric current, differential electrical obtains a continuous current after flowing through constant-current drive circuit, drive device variable color, simultaneously, the voltage at A/D converter Real-Time Monitoring electrochromic device two ends, when this voltage reaches the magnitude of voltage that external environment Color pair is answered, FPGA controls the output that D/A transmodulator cuts off electric current, the color making electrochromic device display consistent with external environment color.
2. the environmental colors self-adaptation device based on electrochromic device according to claim 1, it is characterised in that, the described environmental colors self-adaptation device based on electrochromic device also comprises LCD image display module.
3. the environmental colors self-adaptation device based on electrochromic device according to claim 1, it is characterized in that, described table of searching is made up of address wire and data line, FPGA obtains the digital quantity corresponding to the voltage parameter value of data line according to the color parameter value obtained after image pre-processing unit from address wire, and FPGA is according to the positive and negative sense of current controlling electrochromic device and applying of this magnitude of voltage.
4. the environmental colors self-adaptation device based on electrochromic device according to claim 1, it is characterised in that, described constant-current drive circuit comprises the differential amplifier, amplitude regulating circuit, current sampling circuit and the power MOSFET that connect successively.
5., based on an environmental colors self-adaptation method for electrochromic device, comprise the following steps:
Step 1:FPGA controls the graphic information of CMOS camera data collecting module collected external environment, obtains the view data of external environment;
Step 2:FPGA controls SDRAM data memory module and reads FIFO, writes and carry out data transmission between FIFO, by writing, FIFO is stored to SDRAM data memory module to view data step 1 obtained, realize the buffer memory of view data, FPGA control is read FIFO and is read the view data in SDRAM data memory module, and is transferred to image pre-processing unit;
Step 3: the view data received is processed by image pre-processing unit, obtains external environment color: the matrix that the image received is regarded as 640*480, removes region, edge, obtains the original matrix of 600*400; Using 20 row in original matrix, 20 row as a look block matrix, then can obtain 30*20 look block matrix; Calculate the rgb value plastisied dispersion of each look block matrix, take out the look block matrix that n rgb value plastisied dispersion is minimum, calculate each look block matrix in n the look block matrix taken out rgb value mean value a little, get the look block matrix that in the look block matrix of rgb value similar mean values, plastisied dispersion is minimum rgb value mean value a little, be the rgb value of external environment color;
Step 4: the rgb value parameters input of external environment color step 3 obtained searches table, adopts the matching of look-up tables'implementation color parameter and voltage parameter, can obtain the voltage parameter value that external environment Color pair is answered;
Step 5:FPGA controls D/A transmodulator and exports difference electric current, differential electrical obtains a continuous current signal after flowing through constant-current drive circuit, device is carried out constant-current driving, adopt the voltage at A/D converter Real-Time Monitoring electrochromic device two ends simultaneously, when this voltage reaches the magnitude of voltage that external environment Color pair is answered, FPGA controls the output that D/A transmodulator cuts off electric current, makes electrochromic device demonstrate the color consistent with external environment color.
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| CN110806669A (en) * | 2019-10-25 | 2020-02-18 | 东华大学 | Self-adaptive control system and method for MOFs electrochromic material |
| CN111089390A (en) * | 2019-12-16 | 2020-05-01 | 宁波奥克斯电气股份有限公司 | Color-changeable air conditioner |
| CN112099281A (en) * | 2020-09-17 | 2020-12-18 | 努比亚技术有限公司 | Electrochromic film control method, apparatus and computer-readable storage medium |
| CN113945058A (en) * | 2021-03-03 | 2022-01-18 | 海信（山东）冰箱有限公司 | Refrigerator control method and refrigerator |
| CN112908278A (en) * | 2021-03-08 | 2021-06-04 | Oppo广东移动通信有限公司 | Control device, electronic system and electronic equipment |
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