CN104219457A - Multi-camera control method of mobile phone camera - Google Patents
Multi-camera control method of mobile phone camera Download PDFInfo
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- CN104219457A CN104219457A CN201410461884.0A CN201410461884A CN104219457A CN 104219457 A CN104219457 A CN 104219457A CN 201410461884 A CN201410461884 A CN 201410461884A CN 104219457 A CN104219457 A CN 104219457A
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Abstract
The invention provides a multi-camera control method of a mobile phone camera. A first DA converter is connected with a first light sensing element and converts an analogue electric signal output by the first light sensing element into a digital signal; a second DA converter is connected with a second light sensing element and converts an analogue electric signal output by the second light sensing element into a digital signal; an image processing module receives image signals output by both a first camera and a second camera, and converts the image signals into digital signals; a dimming module receives the digital signals output by both the first DA converter and the second DA converter, and outputs dimming signals based on a pre-stored data table; a first dimming signal is coupled to a first power conversion circuit to control a current value output from a first power conversion circuit to a first LED (Light Emitting Diode); a second dimming signal is coupled to a second power conversion circuit to control a current value output from a second power conversion circuit to a second LED.
Description
Technical field
The present invention relates to electronic technology field, refer to a kind of camera especially.
Background technology
Since First camera is in the world born, being just doomed camera will change life and the history of the mankind.Camera is called for short camera, is that a kind of optical imaging concept that utilizes forms image and uses the equipment of negative writing image.
The light that subject reflects, after being focused on by photographic film and the shutter controlling exposure, the photosensitive material of subject in camera bellows forms sub-image, through rinsing the permanent image of process formation.Camera architecture is the earliest very simple, only comprises camera bellows, camera lens and photosensitive material.Modern camera more complicated, there is camera lens, aperture, shutter, find range, find a view, light-metering, film trasport, counting, auto heterodyne, focusing, the system such as zoom, modern camera is a kind of complex product in conjunction with technology such as optics, precision optical machinery, electronic technology and chemistry.
Digital camera is that a kind of electronic sensor that utilizes converts the camera of electronic data to optical image.Different from the principle that ordinary camera carrys out document image by the chemical change of silver bromide on film, the transducer of digital camera is a kind of Charged Couple (CCD) or complementary metal oxide semiconductors (CMOS) (CMOS) of photoinduction formula.Before image transmitting to computer, usually can first be stored in digital storage equipment.
Mobile phone and camera are born combinations, and along with the development of software and hardware, the shooting effect of mobile phone camera, more and more close to mm professional camera special, the especially Self-timer of mobile phone camera, mm professional camera special is incomparable especially.The moment of mobile phone camera multi-cam control method, the main experience by user oneself operates, and due to shooting angle and the restriction of taking posture, causes the operation such as focusing, light filling of auto heterodyne moment photo to optimize.
Summary of the invention
The present invention proposes a kind of mobile phone camera multi-cam control method, solves in prior art because the restriction of shooting angle and posture, photo operate the problem that cannot optimize to light filling.
Technical scheme of the present invention is achieved in that
A kind of mobile phone camera multi-cam control method, based on the first taking module and the second taking module, described first taking module comprises the first camera, the LED that are arranged on mobile phone front and is arranged on first photo-sensitive cell at the mobile phone back side, and described second taking module comprises the second camera, the 2nd LED that are arranged on the mobile phone back side and is arranged on second photo-sensitive cell in mobile phone front; Described first photo-sensitive cell, the first camera and a LED with the use of, described second photo-sensitive cell, second camera and the 2nd LED with the use of; Comprise the following steps:
Step (a), be connected to described first photo-sensitive cell by the first D/A converter, the analog electrical signal exported is converted to digital signal; Be connected to described second photo-sensitive cell by the second D/A converter, the analog electrical signal exported is converted to digital signal;
Step (b), is received the picture signal of described first camera and second camera output, is converted into digital signal by image processing module;
Step (c), is received the digital signal of described first D/A converter and the output of the second D/A converter, exports dim signal according to the tables of data prestored by light-adjusting module;
Step (d), is couple to the first power transformation circuit by the first dim signal, controls the current value that the first power transformation circuit outputs to a LED; Second dim signal is couple to the second power transformation circuit, controls the current value that the second power transformation circuit outputs to the 2nd LED;
The step that described first power transformation circuit carries out power converter specifically comprises:
First, by the second inductor, filtering is carried out to battery input voltage;
Then, by switching circuit, filtered voltage is processed, switching circuit comprises second switch pipe and the 3rd switching tube, the source electrode of second switch pipe and the 3rd switching tube links together and is connected to the other end of the second inductor, the drain electrode of second switch pipe is connected to secondary earth potential, the drain electrode of the 3rd switching tube is connected to the second capacitor, and the other end of the second capacitor is connected to secondary earth potential; The control end of above-mentioned second switch pipe and the 3rd switching tube is connected to second switch driver, it is Texas Instruments UC3714 chip, clock signal based on control end input produces the switching drive signal of two-way complementation, one tunnel is coupled to described second switch tube grid, another road is coupled to described 3rd switching tube grid, and its control end is connected to described first dim signal;
The step that described second power transformation circuit carries out power converter specifically comprises:
First, the conversion of electric pressure is carried out by transformer, described transformer comprises former limit winding and vice-side winding, former limit winding comprises first end and the second end, vice-side winding comprises first end and the second end, former limit winding first end is connected to battery, and vice-side winding second end is connected to secondary earth potential, and former limit winding first end and vice-side winding second end are Same Name of Ends;
Then, carry out copped wave process by the first switching tube to input voltage, the source electrode of the first switching tube is connected to transformer primary side winding second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;
Next, modulated by the conducting duty ratio of the first switch driver to described first switching tube, first switch driver comprises the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, control end receives described second dim signal, the emitter of the first transistor and transistor seconds links together as output, the collector electrode of the first transistor is connected to battery, and the collector electrode of transistor seconds is connected to former limit earth potential.
The invention has the beneficial effects as follows:
By be arranged on the photo-sensitive cell of other side and camera, LED with the use of, the photo-sensitive cell control LED arranged by opposite side carries out light filling operation to reference object, and the color and luster of photographic images is optimized.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the control principle block diagram of mobile phone camera multi-cam control method of the present invention;
Fig. 2 is the flow chart of mobile phone camera multi-cam control method of the present invention;
Fig. 3 is the circuit diagram of the first power transformation circuit;
Fig. 4 is the flow chart being carried out power converter by the first power transformation circuit;
Fig. 5 is the circuit diagram of the second power transformation circuit;
Fig. 6 is the flow chart being carried out power converter by the second power transformation circuit.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, a kind of mobile phone camera multi-cam control method of the present invention, its operation principle is specially: the first taking module 10 and the second taking module 20, described first taking module 10 comprises the first camera 11, the LED13 that are arranged on mobile phone front and is arranged on first photo-sensitive cell 12 at the mobile phone back side, and described second taking module 20 comprises the second camera 21, the 2nd LED23 that are arranged on the mobile phone back side and is arranged on second photo-sensitive cell 22 in mobile phone front; Described first photo-sensitive cell 12, first camera 11 and a LED13 with the use of, described second photo-sensitive cell 22, second camera 21 and the 2nd LED23 with the use of.
First D/A converter 31, be connected to described first photo-sensitive cell 12, the analog electrical signal exported is converted to digital signal; Second D/A converter 32, be connected to described second photo-sensitive cell 22, the analog electrical signal exported is converted to digital signal.
Image processing module 41, receives the picture signal of described first camera 11 and second camera 21 output, is converted into digital signal; Light-adjusting module 42, receives the digital signal of described first D/A converter 31 and the output of the second D/A converter 32, exports dim signal according to the tables of data prestored.
First dim signal is couple to the first power transformation circuit 50, controls the current value that the first power transformation circuit 50 outputs to a LED13; The photosensitive intensity exported when the first photo-sensitive cell 12 is weak, and a LED carries out light filling operation to reference object.
Second dim signal is couple to the second power transformation circuit 60, controls the current value that the second power transformation circuit 60 outputs to the 2nd LED23; The photosensitive intensity exported when the second photo-sensitive cell 22 is weak, and the 2nd LED23 carries out light filling operation to reference object.
Based on the description of the above-mentioned operation principle to mobile phone camera multi-cam control method of the present invention, as shown in Figure 2, method of the present invention specifically comprises the following steps:
Step (a), be connected to described first photo-sensitive cell by the first D/A converter, the analog electrical signal exported is converted to digital signal; Be connected to described second photo-sensitive cell by the second D/A converter, the analog electrical signal exported is converted to digital signal;
Step (b), is received the picture signal of described first camera and second camera output, is converted into digital signal by image processing module;
Step (c), is received the digital signal of described first D/A converter and the output of the second D/A converter, exports dim signal according to the tables of data prestored by light-adjusting module;
Step (d), is couple to the first power transformation circuit by the first dim signal, controls the current value that the first power transformation circuit outputs to a LED; Second dim signal is couple to the second power transformation circuit, controls the current value that the second power transformation circuit outputs to the 2nd LED.
As shown in Figure 3, the first power transformation circuit 50 comprises: the second inductor 51, and its one end is connected to power supply; Second switch pipe 52 and the 3rd switching tube 53, the source electrode of second switch pipe 52 and the 3rd switching tube 53 links together and is connected to the other end of the second inductor 51, the drain electrode of second switch pipe 52 is connected to secondary earth potential, the other end that the drain electrode of the 3rd switching tube 53 is connected to output and the second capacitor 55, second capacitor 55 is connected to secondary earth potential; First switch driver 54, it is Texas Instruments UC3714 chip, clock signal based on control end input produces the switching drive signal of two-way complementation, and a road is coupled to described second switch pipe 52 grid, and another road is coupled to described 3rd switching tube 53 grid.
Described light-adjusting module 42 exports the control end of the first dim signal to the first switch driver 54, the turn-on and turn-off of control switch pipe, and then controls the electric current outputting to a LED.
Based on the above-mentioned description to the first power transformation circuit, as shown in Figure 4, the step of carrying out power converter by described first power transformation circuit specifically comprises:
First, by the second inductor, filtering is carried out to battery input voltage;
Then, by switching circuit, filtered voltage is processed, switching circuit comprises second switch pipe and the 3rd switching tube, the source electrode of second switch pipe and the 3rd switching tube links together and is connected to the other end of the second inductor, the drain electrode of second switch pipe is connected to secondary earth potential, the drain electrode of the 3rd switching tube is connected to the second capacitor, and the other end of the second capacitor is connected to secondary earth potential; The control end of above-mentioned second switch pipe and the 3rd switching tube is connected to second switch driver, it is Texas Instruments UC3714 chip, clock signal based on control end input produces the switching drive signal of two-way complementation, one tunnel is coupled to described second switch tube grid, another road is coupled to described 3rd switching tube grid, and its control end is connected to described first dim signal.
As shown in Figure 5, second power transformation circuit 60 comprises: transformer 61, comprise former limit winding and vice-side winding, former limit winding comprises first end and the second end, vice-side winding comprises first end and the second end, former limit winding first end is connected to storage battery as input, and vice-side winding second end is connected to secondary earth potential, and former limit winding first end and vice-side winding second end are Same Name of Ends; First switching tube 62, its source electrode is connected to transformer primary side winding second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver 63; First switch driver 63, comprise the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, the emitter of the first transistor and transistor seconds links together as output, and the collector electrode of the first transistor is connected to power supply, and the collector electrode of transistor seconds is connected to former limit earth potential; First diode 64, its anode is connected to transformer secondary winding first end, and its negative electrode is connected to the first inductor 65; The common port of the first inductor 65 and the first capacitor 66 is as output, and the other end of the first capacitor 66 is connected to secondary earth potential.
Described light-adjusting module 42 outputs a control signal to the control end of second switch driver 63, the turn-on and turn-off of control switch pipe, and then controls the electric current outputting to the 2nd LED.
Based on the above-mentioned description to the second power transformation circuit, as shown in Figure 6, the step of carrying out power converter by described second power transformation circuit specifically comprises:
First, the conversion of electric pressure is carried out by transformer, described transformer comprises former limit winding and vice-side winding, former limit winding comprises first end and the second end, vice-side winding comprises first end and the second end, former limit winding first end is connected to battery, and vice-side winding second end is connected to secondary earth potential, and former limit winding first end and vice-side winding second end are Same Name of Ends;
Then, carry out copped wave process by the first switching tube to input voltage, the source electrode of the first switching tube is connected to transformer primary side winding second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;
Next, modulated by the conducting duty ratio of the first switch driver to described first switching tube, first switch driver comprises the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, control end receives described second dim signal, the emitter of the first transistor and transistor seconds links together as output, the collector electrode of the first transistor is connected to battery, and the collector electrode of transistor seconds is connected to former limit earth potential.
Above-mentioned image processing module 41, light-adjusting module 42 can adopt discrete structure to realize, and namely select 2 chip blocks, and pass through the function of the circuit realiration Images uniting taken outward; Image processing module 41, light-adjusting module 42 also can adopt integrated structure to realize, and namely realize image processing module 41, light-adjusting module 42 by the internal processes of DSP circuit.
Preferably, described dsp chip is TMS320DM642 chip.
TMS320DM642 is fixed DSP up-to-date in TI company C6000 series DSP, its core is C6416 type high-performance digital signal processor, there is extremely strong handling property, the flexibility of height and programmability, periphery is integrated with equipment and the interfaces such as very complete audio frequency, video and network service simultaneously.
TMS320DM642 chip comprises: 3 configurable video ports (VPORT0-2) can realize seamless link with general video coding and decoding device, support various video resolution and video standard, support RAW video input/output, transport stream mode; 1 10/100Mb/s Ethernet interface (EMAC), meets IEEE802.3 standard; 1 multichannel band buffered audio serial port (McASP), supports the audio format such as I2S, DIT, S/PDIF, IEC60958-1, AES-3, CP-430; 2 multichannel band Buffered Serial Port (McBSP), adopt RS232 level to drive; 1 VCXO interpolation control unit (VIC), supports that audio/video is synchronous; 1 32,66M hertz, the master/slave pci interface of 3.3V, follow PCI2.2 specification; 1 configurable 16/32 host interface (HPI) of user; 1 16 general input/output port (GPIO); 1 64 external memory interfaces (EMIF), can with most of asynchronous memory (SRAM, EPROM) and synchronous memories (SDRAM, SBSRAM, ZBT SRAM, FIFO) seamless link, maximum addressable external memory storage space is 1024MB; 1 enhancement mode direct memory access controller (EDMA) with 64 autonomous channels, tunnel; 1 data management input/output module (MDIO); 1 I2C bus module; 3 32 general purpose timers; 1 jtag interface and daughterboard interface etc. meeting IEEE1149.1 standard.
The present invention by be arranged on the photo-sensitive cell of other side and camera, LED with the use of, the photo-sensitive cell control LED arranged by opposite side carries out light filling operation to reference object, and the color and luster of photographic images is optimized.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. a mobile phone camera multi-cam control method, based on the first taking module and the second taking module, described first taking module comprises the first camera, the LED that are arranged on mobile phone front and is arranged on first photo-sensitive cell at the mobile phone back side, and described second taking module comprises the second camera, the 2nd LED that are arranged on the mobile phone back side and is arranged on second photo-sensitive cell in mobile phone front; Described first photo-sensitive cell, the first camera and a LED with the use of, described second photo-sensitive cell, second camera and the 2nd LED with the use of; It is characterized in that, comprise the following steps:
Step (a), be connected to described first photo-sensitive cell by the first D/A converter, the analog electrical signal exported is converted to digital signal; Be connected to described second photo-sensitive cell by the second D/A converter, the analog electrical signal exported is converted to digital signal;
Step (b), is received the picture signal of described first camera and second camera output, is converted into digital signal by image processing module;
Step (c), is received the digital signal of described first D/A converter and the output of the second D/A converter, exports dim signal according to the tables of data prestored by light-adjusting module;
Step (d), is couple to the first power transformation circuit by the first dim signal, controls the current value that the first power transformation circuit outputs to a LED; Second dim signal is couple to the second power transformation circuit, controls the current value that the second power transformation circuit outputs to the 2nd LED;
The step that described first power transformation circuit carries out power converter specifically comprises:
First, by the second inductor, filtering is carried out to battery input voltage;
Then, by switching circuit, filtered voltage is processed, switching circuit comprises second switch pipe and the 3rd switching tube, the source electrode of second switch pipe and the 3rd switching tube links together and is connected to the other end of the second inductor, the drain electrode of second switch pipe is connected to secondary earth potential, the drain electrode of the 3rd switching tube is connected to the second capacitor, and the other end of the second capacitor is connected to secondary earth potential; The control end of above-mentioned second switch pipe and the 3rd switching tube is connected to second switch driver, it is Texas Instruments UC3714 chip, clock signal based on control end input produces the switching drive signal of two-way complementation, one tunnel is coupled to described second switch tube grid, another road is coupled to described 3rd switching tube grid, and its control end is connected to described first dim signal;
The step of carrying out power converter by described second power transformation circuit specifically comprises:
First, the conversion of electric pressure is carried out by transformer, described transformer comprises former limit winding and vice-side winding, former limit winding comprises first end and the second end, vice-side winding comprises first end and the second end, former limit winding first end is connected to battery, and vice-side winding second end is connected to secondary earth potential, and former limit winding first end and vice-side winding second end are Same Name of Ends;
Then, carry out copped wave process by the first switching tube to input voltage, the source electrode of the first switching tube is connected to transformer primary side winding second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;
Next, modulated by the conducting duty ratio of the first switch driver to described first switching tube, first switch driver comprises the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, control end receives described second dim signal, the emitter of the first transistor and transistor seconds links together as output, the collector electrode of the first transistor is connected to battery, and the collector electrode of transistor seconds is connected to former limit earth potential.
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| CN201410461884.0A CN104219457A (en) | 2014-09-11 | 2014-09-11 | Multi-camera control method of mobile phone camera |
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| CN201410461884.0A CN104219457A (en) | 2014-09-11 | 2014-09-11 | Multi-camera control method of mobile phone camera |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114374792A (en) * | 2021-12-13 | 2022-04-19 | 中国科学院深圳先进技术研究院 | LED illumination multispectral imaging control system |
| CN115118881A (en) * | 2022-06-24 | 2022-09-27 | 维沃移动通信有限公司 | Signal processing circuit, image sensor, electronic device, and image processing method |
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| CN203608266U (en) * | 2013-10-24 | 2014-05-21 | 惠州市桑莱士光电有限公司 | A handset camera capable of shooting in a dark light environment |
| CN104301589A (en) * | 2014-08-15 | 2015-01-21 | 青岛蓝图文化传播有限公司市南分公司 | Multi-camera mobile phone camera |
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| JP2011239084A (en) * | 2010-05-07 | 2011-11-24 | Olympus Imaging Corp | Imaging device and imaging method |
| CN203608266U (en) * | 2013-10-24 | 2014-05-21 | 惠州市桑莱士光电有限公司 | A handset camera capable of shooting in a dark light environment |
| CN104301589A (en) * | 2014-08-15 | 2015-01-21 | 青岛蓝图文化传播有限公司市南分公司 | Multi-camera mobile phone camera |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114374792A (en) * | 2021-12-13 | 2022-04-19 | 中国科学院深圳先进技术研究院 | LED illumination multispectral imaging control system |
| CN114374792B (en) * | 2021-12-13 | 2024-02-02 | 中国科学院深圳先进技术研究院 | LED illumination multispectral imaging control system |
| CN115118881A (en) * | 2022-06-24 | 2022-09-27 | 维沃移动通信有限公司 | Signal processing circuit, image sensor, electronic device, and image processing method |
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