The content of the invention
It is an object of the invention to provide a kind of camera module, solved dual camera module cost in the prior art it is high andBulky problem；Present invention also offers a kind of terminal, has above-mentioned beneficial effect.
In order to solve the above technical problems, the present invention provides a kind of camera module, including：Camera lens, double-sided reflecting prism, theOne imaging sensor, the second imaging sensor, image synthesis unit；Through the camera lens incident beam pass through it is described two-sided anti-After penetrating the prism change direction of propagation, it is respectively radiated on the first sensor and the second sensor；Adjust described firstSensor and the distance between the second sensor and the double-sided reflecting prism, in order to the first sensor and describedSecond sensor synchronous imaging, and synthesized by described image synthesis module.
Preferably, the camera module also includes voice coil motor, for adjusting the position of the camera lens to change focal length.
Preferably, the side of the double-sided reflecting prism includes Infrared Thin Films optical filter, for repairing incident beam and mistakeFilter the infrared ray in incident beam.
Preferably, described first image sensor is color sensor.
Preferably, described first image sensor is RGB sensors.
Preferably, second imaging sensor is the black and white sensor for gathering incident beam.
Preferably, second imaging sensor is color sensor.
Preferably, the camera module also includes the double filters of IR-CUT, for according to the incident light through the camera lensThe strong and weak change switching filter of beam.
Preferably, described image synthesis module by picture signal treatment technology by described first image sensor with it is describedThe image that second imaging sensor photographs is synthesized, and obtains final image.
Present invention also offers a kind of terminal for including above-mentioned camera module.
Camera module provided by the present invention, including：Camera lens, double-sided reflecting prism, the first imaging sensor, the second figureAs sensor, image synthesis unit；The direction of propagation is changed by the double-sided reflecting prism through the incident beam of the camera lensAnd incident beam is divided into two-beam, wherein a branch of inject the first sensor, another beam enters the second sensor；AdjustThe whole first sensor and the distance between the second sensor and the double-sided reflecting prism, in order to the described first biographySensor and the second sensor synchronous imaging, and synthesized by described image synthesis module.Present invention utilizes oneCamera lens, two sensors of having arranged in pairs or groups, double effects taken the photograph are realized, save the Material Cost, testing cost etc. of a camera lens, andIt is bad that producing line stain etc. can be reduced, while reduce volume.
Embodiment
The core of the present invention is to provide a kind of camera module, reduces cost and body while effect is taken the photograph in realization pairProduct；Present invention also offers a kind of terminal, has above-mentioned beneficial effect.
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed descriptionThe present invention is described in further detail.Obviously, described embodiment is only part of the embodiment of the present invention, rather thanWhole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premiseLower obtained every other embodiment, belongs to the scope of protection of the invention.
Fig. 1 is refer to, Fig. 1 is a kind of structure chart of specific embodiment of camera module provided by the present invention；This realityApplying the camera module 1 that example is provided includes：Camera lens 10, double-sided reflecting prism 11, the first imaging sensor 12, the second image passSensor 13, image synthesis unit.It is irradiated to through the incident beam of camera lens 10 on the double-sided reflecting prism 11, incident beam existsTwo-beam is formed on the double-sided reflecting prism 11, is respectively perpendicular and is irradiated to described first image sensor 12 and second figureAs on sensor 13；The first sensor 12 and second imaging sensor 13 pass through photosensitive imaging.By described in adjustmentDouble-sided reflecting prism 11, the position between described first image sensor 12 and the second sensor 13, make reflected light lightJourney is consistent with transmitted light light path, and two imaging sensors can be with synchronous imaging, so as to reach double effects taken the photograph.
The side of double reflecting prism 11 described in the present embodiment is provided with Infrared Thin Films optical filter, for repairing incident beamWith the infrared ray in filtering incident beam.Infrared absorption filter can also be increased between the camera lens 10 and the double-sided reflecting prism 11Wave plate, for filtering the infrared light in the incident ray.
Described first image sensor 12 can be arranged to color sensor in the present embodiment, while by described secondImaging sensor 13 is arranged to black and white sensor.Described first image sensor 12 can also be arranged to black and white sensor, willSecond imaging sensor 13 is arranged to color sensor.Can also be by described first image sensor 12 and second figureAs sensor 13 is disposed as color sensor, such as RGB sensors.
In the present embodiment, described first image sensor 12 preferably can be arranged to RGB sensors, by describedTwo imaging sensors 13 are arranged to black and white sensor.Black and white sensor is the full impregnated optical sensor of no dichronic mirror filter disc, due toThere is no color separation filter, the optical surface that all incident rays may pass through the double-sided reflecting prism 11 injects image sensingDevice, so bigger light-inletting quantity can be obtained by being compared with the color sensor (RGB sensor) with color separation filter, optics passesThe sensitivity of sensor is also higher.Therefore for black and white sensor relative to color sensor, the image photographed is more bright, details letterBreath can retain more preferable.Therefore the color information of image is gathered using described first image sensor 12, utilizes described secondImaging sensor 13 gathers the detailed information of image, recycles what described image processing module collected two imaging sensorsImage information is synthesized, and generates final target image.
Described image processing module can include imaging sensor processor (ISP Image Sensor Processor)With digital signal processor (DSP Data Signal Processor).ISP is generally used to handle the figure of imaging sensor outputAs information data, such as carry out：Auto-exposure control (AEC), remove noise, be AWB (AWB), color correction (CCM), badThe processing of the functions such as point calibration (DPC).
In the present embodiment, described first image sensor 12 and second imaging sensor 13 can be CCD(Charge-coupled Device) imaging sensor can also be CMOS (Complementary Metal OxideSemiconductor) imaging sensor.The basic means that CCD and CMOS is captured using photo-sensitive cell as image, CCD/The core of CMOS photo-sensitive cells is all a light sensitive diode (photo-diode), and the light sensitive diode is receiving light photographOutput current can be produced after penetrating, and the intensity of electric current is then corresponding with the intensity of illumination.CCD photo-sensitive cell is except photosensitive twoOutside pole pipe, including a memory cell for being used to control adjacent charge, light sensitive diode occupy most areas, i.e.,Effective photosensitive area in CCD photo-sensitive cells is larger, can under equal conditions receive stronger optical signal, corresponding output electricitySignal is also more readily apparent.The composition of CMOS photo-sensitive cells is with regard to more complicated, and in addition to the light sensitive diode in core status, it is alsoIncluding amplifier and analog to digital conversion circuit, the composition of each picture point is a light sensitive diode and three transistors, and photosensitive twoThe area that pole pipe occupies is the sub-fraction of whole element, causes the aperture opening ratio of cmos sensor to be far below CCD (aperture opening ratios：The area ratio of effective sensitization area and whole photo-sensitive cell)；So receiving equal illumination and element size identical situationUnder, the optical signal that CMOS photo-sensitive cells can capture just is significantly less than CCD elements, and sensitivity is relatively low；I.e. cmos sensor is caughtThe picture material grasped to enrich not as ccd sensor, and image detail loss situation is serious and noise is obvious.
In described first image sensor 12 and second imaging sensor 13 after illumination is received, photo-sensitive cell productionElectric current corresponding to life, size of current is corresponding with light intensity, therefore the electric signal that photo-sensitive cell directly exports is simulation.Passed in CCDIn sensor, each photo-sensitive cell is further processed not to this, but it is directly output into next photo-sensitive cellMemory cell, with reference to the element generate analog signal after export again to the 3rd photo-sensitive cell, the like, until combineThe signal of last photo-sensitive cell could form unified output.Because the electric signal all too of photo-sensitive cell generation is faint, can not directly carry out analog-to-digital conversion work, therefore these output datas must do unified enhanced processing-this task and beIt is responsible for specially by the amplifier in ccd sensor, after being handled through amplifier, the electrical signal intensity of each picture point obtains equallyThe increase of amplitude；But because analog signal can not be converted directly into data signal by CCD in itself, thus also need to one it is specialModulus conversion chip is handled, and is finally exported in the form of binary digital image matrix to special DSP process chips.
Each photo-sensitive cell directly incorporates amplifier and analog-to-digital conversion logic in cmos sensor, when photosensitive two poleAfter pipe receives illumination, the electric signal for producing simulation, electric signal is amplified by the amplifier in the photo-sensitive cell first, then directlyIt is converted into corresponding data signal.In other words, in cmos sensor, each photo-sensitive cell can produce final numeralOutput, gained data signal is directly conveyed after merging hands over dsp chip processing, because the amplifier in CMOS photo-sensitive cells belongs toIt analog device, can not ensure that the magnifying power of each picture point keeps strict conformance, cause the view data after amplification not representThe original appearance of shooting object is embodied in final output result, is exactly to occur substantial amounts of noise in image, quality is significantly lower than CCDSensor.
Present invention utilizes a camera lens, an optical filter has been arranged in pairs or groups two sensors, is realized double effects taken the photograph, is savedThe Material Cost, testing cost etc. of one camera lens, and it is bad to reduce producing line stain etc., while reduce volume.
Fig. 2 is refer to, Fig. 2 is the structure chart of another specific embodiment of camera module provided by the present invention；On the basis of above-described embodiment, voice coil motor and infrared filter can be installed in the lower section of the camera lens.The present embodiment instituteThe camera module of offer includes camera lens 20, voice coil motor 21, double-sided reflecting prism 22, the first infrared filter 23, the first figureAs sensor 24, the second infrared filter 25, the second imaging sensor 26.
The voice coil motor 21 is installed between the camera lens 20 and the double-sided reflecting prism 22, for adjusting the mirrorThe position of head is to change focal length.Voice coil motor (Voice Coil Motor VCM) can include：Shell (Shield Case),Support (Frame), for the front pad (F.Spacer) of insulation, for carrying the preceding reed of carrier and trimming moment(F.Spring), for fixing the Yoke of other assemblies and magnetic conduction, for producing the magnetite (Magnet) of permanent-magnetic field, it is used forIt is powered and produces the coil (Coil) of driving moment, for carries the carrier (Carrier) of camera lens, the rear gasket for insulation(B.Spacer), for carrying the rear spring (B.Spring) of carrier and trimming moment, the base for fixed component(Base).Voice coil motor, the voice coil motor inside electronics, be motor one kind, there is high frequency sound, high-precision feature.ItsCardinal principle is in a permanent-magnetic field, by changing the DC current size of motor interior loop, to control the drawing of spring leafPosition is stretched, is moved up and down so as to drive.It is extensive in camera technical field to realize automatic focusing function using VCM, pass throughVCM can adjust the position of camera lens, and clearly image is presented.VCM operation principles are in fixed magnetic field plus electric current or electric charge productionThe principle of raw power, so as to produce the process of motion, i.e. left hand rule.
It can also be installed in the present embodiment between described first image sensor 24 and the double-sided reflecting prism 22First infrared filter 23；Described is installed between second imaging sensor 26 and the double-sided reflecting prism 22Two infrared filters 25.
First infrared filter 23 and second infrared filter 25 can be IR eyeglasses.Light wave can be divided into visibleLight and infrared light (IR light), it is seen that light is different with the wavelength of infrared light, and the difference of wavelength can cause the position of focal plane of imaging different,So as to empty Jiao, the phenomenon of fuzzy pictures occur.IR eyeglasses can correct spherical aberration, allow different light focusings in same position of focal planeOn, so that picture becomes apparent from, meet the needs of shooting at night.The infrared eyeglasses of IR can also be plated using special multilayerMembrane technology, the camera comprising IR eyeglasses to the transmitance of infrared light, can be made than with common camera night to increaseThe distance of shooting is farther, and the image photographed more becomes apparent from.
It should be noted that the double filters of IR-CUT can also be used to substitute the IR eyeglasses, the double filter bags of the IR-CUTInclude；Optical filter and power section；The optical filter can be a piece of IR-cut, or absorption filter and a piece of full impregnatedSpectral filter；Power section includes electromagnetism, motor or other power sources.The double filters of IR-CUT refer in cam lens groupBuilt-in one group of filter, after the infrared induction point outside camera lens detects the strong and weak change of light, built-in IR-CUT is cut automaticallyChanging filter can automatically switch therewith according to the power of extraneous light, image is reached optimum efficiency.That is, on daytime orUnder night, double optical filters can automatically switch filter, therefore whether under daytime or night, can obtain optimal imaging effectFruit.
Added in the camera module provided in the present embodiment for adjusting the position of the camera lens to change JiaoAway from voice coil motor.On the basis of above-described embodiment, the present embodiment is also provided with two infrared filters, so as to more preferableFiltering inject two imaging sensors light in infrared light, so as to which the picture become apparent from is presented on the image sensor.
Based on above-described embodiment, terminal provided by the invention can include the camera module that above-described embodiment is provided,Microprocessor, infrared inductor.
The infrared inductor is arranged in the same horizontal line of the camera module, for sensing incident rayPower change, filter switching command is issued in order to which microprocessor changes to the double filters of IR-CUT according to the power of incident ray.
The other devices and workflow of the camera module for the terminal that the present embodiment is provided can refer to above-mentioned realityThe introduction of example is applied, will not be repeated here.
The terminal that the present embodiment is provided, using a camera lens, two sensors of having arranged in pairs or groups, double effects taken the photograph are realized,The Material Cost of a camera lens, testing cost etc. are saved, and can reduce that producing line stain etc. is bad, while reduces the body of terminalProduct.
Camera module provided by the present invention and terminal are described in detail above.It is used herein specificallyIndividual example is set forth to the principle and embodiment of the present invention, and the explanation of above example is only intended to help and understands the present inventionMethod and its core concept.It should be pointed out that for those skilled in the art, original of the invention is not being departed fromOn the premise of reason, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into right of the present invention and wantedIn the protection domain asked.