CN104159045A - Mobile phone camera with dual-mode light compensation - Google Patents
Mobile phone camera with dual-mode light compensation Download PDFInfo
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- CN104159045A CN104159045A CN201410415264.3A CN201410415264A CN104159045A CN 104159045 A CN104159045 A CN 104159045A CN 201410415264 A CN201410415264 A CN 201410415264A CN 104159045 A CN104159045 A CN 104159045A
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Abstract
The invention provides a mobile phone camera with dual-mode light compensation. The mobile phone camera comprises a first camera, a first LED (Light Emitting Diode), a first photosensitive element, a first DA (Digital-Analog) converter, an image processing module, a dimming module, a first dimming signal and a second dimming signal, wherein the first camera and the first LED are arranged at the front side of a mobile phone, the first photosensitive element is arranged at the back side of the mobile phone, and the first photosensitive element and the first camera are used cooperatively; the first DA converter is connected to the first photosensitive element, and an analog electric signal output by the first DA converter is converted to a digital signal; the image processing module is used for receiving an image signal output by the first camera and converting the image signal to the digital signal; the dimming module is used for receiving the digital signal of the first DA converter and outputting the dimming signal according to a pre-stored data list; the first dimming signal is coupled to a first power conversion circuit to control the current of the first power conversion circuit, which is output to the first LED; the second dimming signal is coupled to an image synthesis module.
Description
Technical field
The present invention relates to electronic technology field, refer to especially a kind of camera.
Background technology
Since First camera is in the world born, has just been doomed camera and will have changed the mankind's life and history.Camera is called for short camera, is a kind of equipment that utilizes optical imaging concept to form image and use negative writing image.
After the shutter focusing of the light that subject reflects by photographic film and control exposure, on the photosensitive material of subject in camera bellows, form sub-image, through rinsing to process, form permanent image.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, the system such as photometry, film trasport, counting, auto heterodyne, focusing, zoom, modern camera is the complex product of the technology such as a kind of combination optics, precision optical machinery, electronic technology and chemistry.
Digital camera is that a kind of electronic sensor that utilizes converts optical image in the camera of electronic data.Come the principle of document image different from ordinary camera chemical change by silver bromide on film, the transducer of digital camera is a kind of electric charge coupling (CCD) or complementary metal oxide semiconductors (CMOS) (CMOS) of photoinduction formula.At image transmitting, before computer, conventionally can first be stored in digital storage equipment.
Mobile phone and camera are born combinations, along with the development of software and hardware, the shooting effect of the mobile phone camera of double mode light compensation, has more and more approached mm professional camera special, the Self-timer of the mobile phone camera of especially double mode light compensation, mm professional camera special is incomparable especially.The moment of the mobile phone camera of double mode light compensation, mainly the experience by user oneself operates, and due to the restriction of shooting angle and shooting posture, the light filling operation of photo constantly that causes autodyning cannot be optimized.
Summary of the invention
The present invention proposes a kind of mobile phone camera of double mode light compensation, has solved in prior art due to the restriction of shooting angle and posture, the problem that the operation of photo light filling cannot be optimized.
Technical scheme of the present invention is achieved in that
A mobile phone camera for double mode light compensation, comprising: be arranged on the first camera, a LED in mobile phone front and be arranged on first photo-sensitive cell at the mobile phone back side, described the first photo-sensitive cell and the first camera are used in conjunction with;
The one DA transducer, is connected to described the first photo-sensitive cell, and the analog electrical signal of its output is converted to digital signal;
Image processing module, receives the picture signal that described the first camera is exported, and is converted into digital signal;
Light-adjusting module, receives the digital signal of a described DA transducer, according to the tables of data output dim signal prestoring;
The first dim signal, is couple to the first power transformation circuit, controls the electric current that the first power transformation circuit outputs to a LED;
Transformer, comprise former limit winding and secondary winding, former limit winding comprises first end and the second end, secondary winding comprises first end and the second end, former limit winding first end is connected to described storage battery, secondary winding the second end is connected to secondary earth potential, and former limit winding first end and secondary winding the second end are Same Name of Ends;
The first switching tube, its source electrode is connected to transformer primary side winding the second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;
The first switch driver, 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, and control end receives the first dim signal of described light-adjusting module output, and the emitter of the first transistor and transistor seconds links together as output, the collector electrode of the first transistor is connected to storage battery, and the collector electrode of transistor seconds is connected to former limit earth potential;
The first diode, its anodic bonding is to transformer secondary winding first end, and its negative electrode is connected to the first inductor;
The common port of the first inductor and the first capacitor is as output, and the other end of the first capacitor is connected to secondary earth potential;
The second dim signal, is couple to image synthesis unit;
Image synthesis unit, be connected to the second dim signal of described image processing module and light-adjusting module, when the influence value of the first photo-sensitive cell on the weak side, export the first dim signal to the first power transformation circuit, control a LED to reference object light filling, image synthesis unit is directly exported the picture signal of the first camera; When the influence value of the first photo-sensitive cell is partially strong, output the second dim signal is to image synthesis unit, and image synthesis unit is synthesized the image of the first camera and the second dim signal, and output is through the picture signal of the synthetic light modulation of software.
The invention has the beneficial effects as follows:
By being arranged on photo-sensitive cell and the camera of an other side, be used in conjunction with, picture signal and the dim signal when light is partially strong, camera taken are synthetic, and output is through the image of light modulation; When light is on the weak side, control LED to reference object light filling, the color and luster of image 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, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the control block diagram of the mobile phone camera of the double mode light compensation of the present invention;
Fig. 2 is the circuit diagram of the first power transformation circuit of the mobile phone camera of the double mode light compensation of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the mobile phone camera of a kind of double mode light compensation of the present invention, comprise: be arranged on the first camera 11, a LED13 in mobile phone front and be arranged on first photo-sensitive cell 12 at the mobile phone back side, described the first photo-sensitive cell 12 and the first camera 11 are used in conjunction with.
The one DA transducer 31, is connected to described the first photo-sensitive cell 11, and the analog electrical signal of its output is converted to digital signal; Image processing module 41, receives the picture signal that described the first camera 11 is exported, and is converted into digital signal; Light-adjusting module 42, receives the digital signal of a described DA transducer 31, according to the tables of data output dim signal prestoring.
The first dim signal, is couple to the first power transformation circuit 14, controls the electric current that the first power transformation circuit 14 outputs to a LED; The second dim signal, is couple to image synthesis unit 43.
Image synthesis unit 43, be connected to the second dim signal of described image processing module 41 and light-adjusting module 42, when the influence value of the first photo-sensitive cell 12 on the weak side, export the first dim signal to the first power transformation circuit 14, control a LED13 to reference object light filling, image synthesis unit 43 is directly exported the picture signal of the first camera; When the influence value of the first photo-sensitive cell 12 is partially strong, output the second dim signal is to image synthesis unit 43, and image synthesis unit 43 is synthesized the image of the first camera and the second dim signal, and output is through the picture signal of the synthetic light modulation of software.
As shown in Figure 2, the first power transformation circuit 50 comprises: transformer 51, comprise former limit winding and secondary winding, former limit winding comprises first end and the second end, secondary winding comprises first end and the second end, former limit winding first end is connected to storage battery as input, and secondary winding the second end is connected to secondary earth potential, and former limit winding first end and secondary winding the second end are Same Name of Ends; The first switching tube 52, its source electrode is connected to transformer primary side winding the second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver 53; The first switch driver 53, 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; The first diode 54, its anodic bonding is to transformer secondary winding first end, and its negative electrode is connected to the first inductor 55; The common port of the first inductor 55 and the first capacitor 56 is as output, and the other end of the first capacitor 56 is connected to secondary earth potential.
Described light-adjusting module 42 is exported the first dim signals to the control end of the first switch driver 53, the turn-on and turn-off of control switch pipe, and then control the electric current that outputs to a LED.
Above-mentioned image processing module 41, light-adjusting module 42 and image synthesis unit 43 can adopt discrete structure to realize, and select 3 chip blocks, and realize image synthetic function by the circuit of taking outward; Image processing module 41, light-adjusting module 42 and image synthesis unit 43 also can adopt integrated structure to realize, and by the internal processes of DSP circuit, realize image processing module 41, light-adjusting module 42 and image synthesis unit 43.
Preferably, described dsp chip is TMS320DM642 chip.
Up-to-date fixed DSP in the TMS320DM642 ShiTI C6000 of company series DSP, its core is C6416 type high-performance digital signal processor, there is extremely strong handling property, flexibility and the programmability of height, simultaneously peripheral integrated very complete equipment and the interface such as audio frequency, video and network service.
TMS320DM642 chip comprises: 3 configurable video ports (VPORT0-2) can be realized seamless link with general video coding and decoding device, supports various video resolution and video standard, supports RAW video input/output, transport stream mode; 1 10/100Mb/s Ethernet interface (EMAC), meets IEEE 802.3 standards; 1 multichannel band buffered audio serial port (McASP), supports I2S, DIT, S/PDIF, IEC60958-1, the audio formats such as AES-3, CP-430; 2 multichannel band buffering serial ports (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 standard; 1 configurable 16/32 host interface of user (HPI); 1 16 general input/output port (GPIO); 1 64 external memory interfaces (EMIF), can with most of asynchronous memories (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 that meets IEEE 1149.1 standards and daughter board interface etc.
The present invention is used in conjunction with by being arranged on photo-sensitive cell and the camera of an other side, and picture signal and the dim signal when light is partially strong, camera taken are synthetic, and output is through the image of light modulation; When light is on the weak side, control LED to reference object light filling, the color and luster of image is optimized.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (1)
1. a mobile phone camera for double mode light compensation, is characterized in that, comprising: be arranged on the first camera, a LED in mobile phone front and be arranged on first photo-sensitive cell at the mobile phone back side, described the first photo-sensitive cell and the first camera are used in conjunction with;
The one DA transducer, is connected to described the first photo-sensitive cell, and the analog electrical signal of its output is converted to digital signal;
Image processing module, receives the picture signal that described the first camera is exported, and is converted into digital signal;
Light-adjusting module, receives the digital signal of a described DA transducer, according to the tables of data output dim signal prestoring;
The first dim signal, is couple to the first power transformation circuit, controls the electric current that the first power transformation circuit outputs to a LED;
Described the first power transformation circuit comprises:
Transformer, comprise former limit winding and secondary winding, former limit winding comprises first end and the second end, secondary winding comprises first end and the second end, former limit winding first end is connected to described storage battery, secondary winding the second end is connected to secondary earth potential, and former limit winding first end and secondary winding the second end are Same Name of Ends;
The first switching tube, its source electrode is connected to transformer primary side winding the second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;
The first switch driver, 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, and control end receives the first dim signal of described light-adjusting module output, and the emitter of the first transistor and transistor seconds links together as output, the collector electrode of the first transistor is connected to storage battery, and the collector electrode of transistor seconds is connected to former limit earth potential;
The first diode, its anodic bonding is to transformer secondary winding first end, and its negative electrode is connected to the first inductor;
The common port of the first inductor and the first capacitor is as output, and the other end of the first capacitor is connected to secondary earth potential;
The second dim signal, is couple to image synthesis unit;
Image synthesis unit, be connected to the second dim signal of described image processing module and light-adjusting module, when the influence value of the first photo-sensitive cell on the weak side, export the first dim signal to the first power transformation circuit, control a LED to reference object light filling, image synthesis unit is directly exported the picture signal of the first camera; When the influence value of the first photo-sensitive cell is partially strong, output the second dim signal is to image synthesis unit, and image synthesis unit is synthesized the image of the first camera and the second dim signal, and output is through the picture signal of the synthetic light modulation of software.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410415264.3A CN104159045A (en) | 2014-08-21 | 2014-08-21 | Mobile phone camera with dual-mode light compensation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410415264.3A CN104159045A (en) | 2014-08-21 | 2014-08-21 | Mobile phone camera with dual-mode light compensation |
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Citations (5)
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| CN1756269A (en) * | 2004-10-01 | 2006-04-05 | 居里泰尔通讯株式会社 | Mobile communication terminal equipped with digital image capturing module and method of capturing digital image |
| CN102005931A (en) * | 2010-04-08 | 2011-04-06 | 深圳市航嘉驰源电气股份有限公司 | Forward converter |
| US20110080497A1 (en) * | 1999-09-14 | 2011-04-07 | Nikon Corporation | Electronic still camera with peaking function |
| CN102014207A (en) * | 2010-11-30 | 2011-04-13 | 中兴通讯股份有限公司 | Communication terminal and visual telephone processing method |
| CN103985087A (en) * | 2013-02-08 | 2014-08-13 | 北京银万特科技有限公司 | Mirror image display and information processing method based on intelligent information terminal |
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2014
- 2014-08-21 CN CN201410415264.3A patent/CN104159045A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110080497A1 (en) * | 1999-09-14 | 2011-04-07 | Nikon Corporation | Electronic still camera with peaking function |
| CN1756269A (en) * | 2004-10-01 | 2006-04-05 | 居里泰尔通讯株式会社 | Mobile communication terminal equipped with digital image capturing module and method of capturing digital image |
| CN102005931A (en) * | 2010-04-08 | 2011-04-06 | 深圳市航嘉驰源电气股份有限公司 | Forward converter |
| CN102014207A (en) * | 2010-11-30 | 2011-04-13 | 中兴通讯股份有限公司 | Communication terminal and visual telephone processing method |
| CN103985087A (en) * | 2013-02-08 | 2014-08-13 | 北京银万特科技有限公司 | Mirror image display and information processing method based on intelligent information terminal |
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Application publication date: 20141119 |