CN103324304B - Photosensor array device - Google Patents
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Abstract
A kind of photosensor array device, comprise the induction unit with multiple array format, form a sensor array, there is the first comparison circuit of each induction of connection, can calculate the first energy state of each induction, device is provided with as radium-shine light source and control circuit, control circuit can be obtained the first energy signal of multiple inductions, and judge the capacity volume variance that disturb in the space that formed by surface reflection, through the compensation mechanism of adjusting the intensity of light source and coordinating the adjusting of time for exposure to set up, sensor array device can adapt to the surface of more situation.
Description
Technical field
The present invention is about a kind of photosensor array device, and particularly a kind of employing is multiple with array formatThe sensor array device of induction chip composition.
Background technology
Optical sensor is for passing through as CMOS (CMOS), CCD (electric charge coupling groupPart) etc. sensing component the light of acceptance is converted to the signal of telecommunication, general technology can be obtained by this class componentThe intensity (energy) of specific light source, accordingly can judging distance (as range sensor), along with the timeEnergy variation, even as the assembly of image capture.
Optical indicating device is as computer mouse, and the judgement that can utilize optical sensor to move as track, works as productRaw light directive one operates plane, and energy variation, the image that can receive by surrounding time are processed judgementA motion-vector. The internal circuit schematic diagram of optical mouse 10 as shown in Figure 1, optical mouse 10 inOn one surface 11, move, the primary clustering of mouse case 12 internal circuits except some optical modules, electricityRoad part is provided with a circuit board 14, and circuit board 14 is provided with the control of a control and computing utilizing emitted light and sensor lightDevice 18, and a light source 16 and sensor 19.
On the shell 12 of this optical mouse 10, there is a fluting 17 on surface 11 towards the outside, this circuit board14 be located near this fluting (aperture) 17, and circuit board 14 is provided with as radium-shine or light emitting diode(LED) light source 16. In the time that this optical mouse 10 operates, light source 16 produces utilizing emitted light continuously, with spyDetermine angle directive surface 11, as dotted line in figure represents, obtain catoptrical signal through sensor 19, or getThe image that obtains intensity of reflected light distributes (as sensor 19 can be CMOS or CCD image sensor), controlsDevice 18 analyzes the moving direction of optical mouse 10.
In the technology judging at the track of the aforementioned optical mouse of knowing 10, quite rely on by surface 11 and obtainCatoptrical signal, therefore the function of general optical mouse 10 will have not along with the form on surface 11Same performance.
In the object tracking at light, general technology will be transparent or be difficult for reflective because of surface textureMaterial produces and judges failed problem, causes and cannot track, and also just may make relevant apparatus (as optics mouseMark) cannot operate smoothly.
In prior art, if wish allows the device that light tracks still possess the function necessarily tracking in Different Plane,Obtain extra outside location sensing or some complex calculations of the many uses of mode that light moves conduct, butThese location sensings or computings are because the restriction of sensitivity, highly energy-consuming and complicated algorithm etc. are former thereby only fitFor limited plane sample state. These optical sensors of knowing can not be applicable to all high reflections or veryIn the plane of antiradar reflectivity.
Summary of the invention
The object of the present invention is to provide a kind of light autonomous tracing in intelligent vehicle and device, solved the existing light dress that tracksPut in Different Plane, to possess and track function and cannot be applicable to all high reflections or antiradar reflectivity veryPlane on problem.
The present invention is achieved in that a kind of photosensor array device, comprising:
The induction unit of multiple array format, composition one sensor array, is wherein provided with multiple inoperative sensesYing Yuan, this sensor array is for being received from the light of a surface reflection;
Multiple comparators, induction unit of the corresponding connection of each comparator, for comparing two energy letters of inputNumber, one is the energy signal that this induction unit produces, and is separately a mean value;
One light supply apparatus, for generation of this surperficial light of incident; And
One control circuit, is electrically connected the plurality of induction unit, the plurality of comparator and this light supply apparatus, forControl this light supply apparatus and produce this light, and obtain the first energy signal of the plurality of induction, and judge by thisThe capacity volume variance that disturb in the space that surface reflection forms.
Particularly, this light supply apparatus is the good light source of a space same tone.
Particularly, this light supply apparatus is a laser light device.
Particularly, the work period of this control circuit by controlling a PWM control signal is to control this lightThe light period of source apparatus.
Further, the also gain of the energy signal of the plurality of induction of dynamic adjustments unit output of this control circuit.
Particularly, this control circuit is according to the energy by first this sensor array feedback forming of the plurality of inductionSignal controlling is respectively responded to first signal gain.
Particularly, this control circuit is receiving after the first energy signal of the plurality of induction, and only acquisition is wherein wholeOr part work respond to first energy signal, calculate this mean value.
Particularly, this control circuit is adjusted the luminous intensity that this light supply apparatus produces.
Particularly, this control circuit is according to being regulated by the obtained light intensity signal of the plurality of inoperative induction unitThe drive current of this light supply apparatus, the luminous intensity producing to adjust this light supply apparatus.
Particularly, this inoperative induction unit is located at this sensor array around.
Provided by the inventionly a kind ofly carry out according to reflection interference method and the light tracing device that light tracks, itsThe image of the constructive and destruction interference of light between light and the former utilizing emitted light of application surface reflection, as trackingThe foundation of identification can still have the function tracking in the plane of various sample states, be applicable to all high reflections orPerson is very in the plane of antiradar reflectivity.
Brief description of the drawings
Figure 1 shows that optical mouse internal circuit schematic diagram of the prior art;
Figure 2 shows that plane of incidence of the present invention and catoptrical reflection optical path schematic diagram;
Figure 3 shows that in photosensor array device of the present invention and be packaged in the sensor array in an integrated circuitSchematic diagram;
Figure 4 shows that the embodiment schematic diagram of the sensor array of apparatus of the present invention employing;
Figure 5 shows that the induction unit schematic layout pattern of photosensor array device of the present invention;
Figure 6 shows that gain control and the Dolby circuit module map of photosensor array device inner light source of the present invention;
Figure 7 shows that photosensor array device of the present invention respectively responds to unit and carry out the schematic diagram of light autonomous tracing in intelligent vehicleOne of;
Figure 8 shows that the first signal of carrying out light autonomous tracing in intelligent vehicle of each induction in photosensor array device of the present inventionTwo of figure.
[symbol description]
Optical mouse 10 surfaces 11
Mouse case 12 circuit boards 14
Controller 18 light sources 16
Sensor 19 slots 17
Incident light 201 surface textures 205
Reverberation 203
Circuit board 30 sensor arrays 32
Respond to first 301 light supply apparatuses 34
Range of exposures 303 control circuits 36
Induction unit 401,402,403,404,405
Comparator 421,422,423,424,425
Add up device 501 gain amplifiers 502
Calculator 503 output voltage V out
Inoperative induction unit 511,512,513,514,515,516
Induction unit 521,522,523,524
Voltage source V supply light supply apparatus 601
Current limiter 602 current controllers 603
The first gain controller 604 microprocessors 607
Analog-digital converter 605 second gain controllers 608
Parameter 606 comparing units 609
Light intensity signal 60 holding wires 611,612,613,614
Induction unit combination 701,702,703,704,705,706
Average voltage signal Vavg direction X, Y
The t0 very first time, t1 the second time
Induction unit combination 801,802
Detailed description of the invention
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 carried out clearlyChu, intactly description.
The present invention describes a kind of photosensor array device, namely a kind of sense having with array formatThe sensor array of answering chip composition, one of embodiment is for being received from the light of a surface reflection, Jin ErgenThe energy of reflection light receiving according to multiple induction chips judges the constructive or destruction interference figure in reverberationPicture, judges that by surrounding time energy variation judges a motion-vector, if be applied in light indicating device,Can judge its apparent surface's moving direction.
For instance, if taking optical mouse as example, if light source adopts same light modulation (coherentlight) or saysBe the good light in a kind of space same tone (spatialcoherence) as light source, detecting moving direction by using by this,And can be in conjunction with the mode of sensitivity compensation (sensitivitycompensation), utilize a kind of light algorithm that tracks(movementrecognitionalgorithm), simultaneously can noise reduction, the therefore relevant device that adopts this technologyGo in the plane of various aspects.
It is worth mentioning that, in photosensor array device proposed by the invention, can adopt a kind of same light modulationThe integrated encapsulation technology in source (coherentlightsourcepackageintegration), adopts this type of technologyDevice, as optical indicating device, need not install extra optical lens or specific image sensor, as oneCMOS image sensor (CMOSimagesensor, CIS).
Because prior art adopts the device (as optical mouse) of general optical sensor can not be applicable to instituteThere is high reflection or very in the plane of antiradar reflectivity, the present invention proposes a kind of photosensor array device, logicalCross comprising multiple induction chips with array format and the corresponding algorithm that tracks, reach effectively and seekThe object of mark. Wherein the embodiment space same tones (spatialcoherence) such as laser light of also can arranging in pairs or groups are goodLight source, provides the ability that tracks as good in devices such as optical mouse accordingly. Application surface is reflected in the present inventionLight produces image constructive and destruction interference, as the foundation of the identification that tracks.
Please first referring to producing incident light 201 by a specific light source device (not being shown in Fig. 2) shown in Fig. 2Directive one plane reflects to form the schematic diagram of multiple reverberation 203 again, and light source particularly adopts a kind of as radium-shineSame light modulation (coherentlight), " same to light modulation " described herein refers to that a kind of space same tone is goodLight.
Multiple optical paths that this Fig. 2 shows comprise that one of incident light 201 directive has the plane of surface texture 205,Reflect to form again reverberation 203. Because microcosmic surface structure 205 is irregular structure, therefore reverberation203 form the light that has as shown in Figure 2 different directives.
Light supply apparatus produces incident light 201 directive planes continuously, and reflects to form reverberation 203, anti-in processPenetrate light 203 via sensor (not being shown in Fig. 2) receive, in various optical paths, produced light constructive withThe image (pattern) of destruction interference, uses the incident light of people having the same aspiration and interest light source can strengthen this interference herein especiallyEffect (interferenceeffect).
When the device that is loaded with the interlock circuit of carrying out this autonomous tracing in intelligent vehicle enters with respect to sense plane (X-Y plane)When row is mobile, wherein optical sensor receives the information of reverberation 203, then according to the time interval (timeslot)Sampling (sampling) wherein information data, and obtain the average energy value of reverberation 203, and calculate anti-Penetrate the capacity volume variance of light 203 different times, diverse location. Disclosed photosensor array deviceAdopt sensor array (sensorarray) to obtain reverberation 203 diverse location energy, and and average energyThe difference of value, can judge motion track. Wherein the calculating of reverberation 203 mean values can adopt entirelyThe energy that induction unit of portion obtains average, or the average energy obtained of part induction unit, such as with row (asThe directions X of Fig. 5) mean value or row (as the Y-direction of Fig. 5) the mean value computing reference that is mean value;Also the average energy that may take periphery or mid portion is as with reference to mean value.
According to adopting one of embodiment of the sensor array, if taking same light modulation as light source, can strengthen anti-Penetrate the interference effect of light. In Yi Bobao (waveenvelope), there is very little phase for a kind of with light modulationPosition postpones the light source of (phasedelay), and wherein laser light is a kind of same light modulation, be different from sunshine orThe non-same light modulations such as LED light.
In the photosensor array device that application discloses in the present invention with light modulation, sensing can be improved with light modulation anti-Penetrate the sensitivity of the optical pickocff of light interference. Because have very little phase difference (phasedifference) with light modulationCharacteristic, the space producing with respect to non-people having the same aspiration and interest reflection of light light disturb (spatialinterference), withLight modulation has less phase delay (phasedelay) phenomenon. Therefore, adopt and can add strong reflection with light modulationThe advantage that disturb in light space, sensor as aforementioned array (for light) can be obtained through a plane reflection lightSpace disturb difference.
Sensor array can be consulted shown in Fig. 3 and be packaged in an integrated circuit in photosensor array device of the present invention(IC) schematic diagram of the sensor array in.
In Fig. 3, be presented at the sensor array 32 on photosensor array device interior circuit board 30, optical sensorArray apparatus can be applicable on optical mouse or specific indicating device, and sensor array 32 includes array formatThe multiple inductions of arranging are first 301, are packaged in an integrated circuit by the technology of this integrated encapsulation(integratedopticalsensorarrayonIC), comprise in one embodiment, make sensor array simultaneouslyThe control circuit 36 that row 32 and circuit are integrated, first 301 (the particularly works of multiple inductions on sensor array 32Do induction unit, there is fixing spacing and relative position uniformly between as shown in Figure 5), with average receivedThrough the light of particular surface/plane reflection. As shown in Figure 3, put down by light supply apparatus 34 emission of lights toRange of exposures 303 on face, light directive sensor array 32 after plane reflection afterwards, wherein respectively inductionUnit 301 receives respectively the reverberation of different directions, changes the control in device by suitable photosignalCircuit 36 and interlock circuit are obtained can calculate after signal and are added up each induction unit 301 energy that receiveMean value, more then calculate the difference of each induction unit 301 and mean value, relevant control circuit will be sentenced according to thisDisconnected capacity volume variance (the spatialinterference that draws the space interference being formed by a surface or plane reflectionDifference), control circuit 36 is according to the energy difference of accumulation calculating before and after each time interval (timeslot)The different moving direction of judging.
The photosensor array device that above-described embodiment discloses, disturb in so-called space, when light (specialBe same light modulation, but invention being not limited to same light modulation) directive has behind the surface of irregular surface structure reflection again produceThe reverberation of different directions and the light that produces disturbs (interference), this light produces construction after reflectionProperty or destructive interference pattern, afterwards, obtain because relative motion (device and plane by sensor arrayRelative motion) after the spatial information of plane reflection, be based upon the Mobile data on X-Y plane.
As shown in Figure 3, in an embodiment, invention discloses carrying of application photosensor array device especiallyBody can be an optical indicating device taking laser light as light source, as optical mouse, and wherein main circuit assembly bagDraw together the light supply apparatus 34 of being located on a circuit board 30, for generation of the light of an incidence surface, include sensingDevice array 32, wherein has the multiple inductions unit 301 with array format, and includes aforesaid controlCircuit 36, control circuit 36 couples light supply apparatus 34 and sensor array 32, first for obtaining multiple inductionsThe optical signal that 301 interior multiple inducing pixels receive, and calculating energy state, and computing time interval energyAmount state variation.
Fig. 4 follows that sensor array running calculating energy that display light sensor array device adopts distributesEmbodiment schematic diagram.
Fig. 4 has shown the layout of sensor array, and multiple induction unit is distributed on X-Y plane, forms NxMSensor array, the form of sensor array is not limited to symmetrical rectangle, square, circle, ellipseEtc. geometry, can determine according to practical application. Sensor array comprises multiple senses of array formatAnswer unit 401,402,403,404,405, respectively along X, Y-direction setting, actual quantity is notBe limited to this schematic diagram. Lay these induction units 401,402,403,404, main on 405 circuit boardAssembly also has multiple comparators 421,422,423,424,425, an induction of the corresponding connection of each comparatorUnit, input value is the average voltage signal Vavg of the energy of each induction unit generation, for relatively responding to unit's senseMeasure the voltage signal obtaining after light, can relatively obtain the signal value of high low-voltage. Finally, controlCircuit obtains adjacent two sensor values comparison results, makes the judgement of moving direction.
Such as comparator in Fig. 4 421 is coupled to induction unit 401, one of them input signal responds to unit 401The energy signal that institute's sensing produces, can use voltage signal indication, and another input is average voltage signalVavg, therefore comparator 421 these two input signals of comparison, can export a comparative result, the present inventionPreferably represent this comparative result with a binary feature value (binarycharacteristicvalue), such as Fig. 7Shown in the high low voltage signal that represents respectively of H or L.
In the photosensor array device of recording according to invention, the mode feature of utilizing sensor array to trackBe the constructive and destructive interference pattern that utilizes light (being preferably same light modulation) to form after plane reflectionThe Energy distribution (energypattern) of middle demonstration, changes judgement by the Energy distribution of different time and moves toAmount. Wherein embodiment is such as adopting a kind of irrelevant viewpoint to move judgement (non-relativeviewPointstodomovementjudgment) mode, namely introduces and responds to first energy information around,With the average inductive energy judgement moving direction of comparing. It is worth mentioning that, this is different from general using shadowPicture pixel (pixel) information judges the mode of motion-vector, and the present invention is by employing time and calculating energyChange and judge motion track.
For photosensor array device itself, according to one of embodiment, photosensor array device of the present inventionInduction chip layout in, induction chip comprises the induction unit with arrayed, these induction units can compriseBe located at the induction unit (being called inoperative induction unit) not acting on around, and be located at the responsible reception of middle bodyThe work induction unit of light, therefore the control circuit in photosensor array device or correlation computations circuit are through gettingAfter must all inductions first energy signal, only the acquisition first energy signal of induction of wherein working continues follow-up utilization.Consult the induction unit schematic layout pattern shown in Fig. 5.
Fig. 5 shows the multiple inductions unit being provided with in an induction chip with array format, at middle bodyThe outer puppet's sensor (dummysensor) that is arranged with of induction unit, object is to make whole induction chip systemJourney is more even, also can therefore make more even sensing energy. Fig. 5 shows the inoperative induction unit being located at around511,512,513,514,515,516 are made as idle induction unit, and are located at the induction unit near mid portion521,522,523,524 is the inductive component of main induction light heat input.
When the induction unit of an array format exposes in a reverberation simultaneously, wherein can evenly feelThe induction unit of required light is for being partial to the inductive component of middle body, and induction unit around may connectReceive the possibility of inhomogeneous energy, therefore add up whole induction chip receive gross energy time, can pass throughSetting inoperative induction unit (511,512,513,514,515,516) gets rid of these jitter may occurEnergy value, and can obtain the reference energy value relatively with reference value.
As shown in Figure 5, circuit is provided with a totalling device 501, is electrically connected to each induction unit in induction chip,Can obtain each and respond to first photo-signal, and can be converted into magnitude of voltage by analog digital, butBecause the photoelectric current of the first receiving optical signals of each induction in induction chip is minimum, need the stage of amplifying by gainJust can obtain effective referential data, and can follow obtained energy variation before and after the computing time of interval.According to this embodiment, these photo-signals, after gain amplifier 502 is processed, form an output of outputSignal, as the signal representing with output voltage V out; The energy of effectively obtaining through calculator 503 bases in additionThe output of amount calculated signals mean value, output is as average voltage signal Vavg.
Afterwards, aforementioned output signal (as output voltage V out) and mean value (as average voltage signal Vavg)By the comparator exporting to as shown in Figure 4, allow comparator can compare induction first energy signal and a referenceBe worth (average energy as first in all or part of induction), obtain by this energy state of this induction unit, realityUpper each induction unit can high with digital form (H) represent energy state with low (L).
Primary clustering in photosensor array device except aforementioned with induction unit, the light source of array formatOutside control circuit, also in an embodiment, integrate the gain amplifying circuit that signal is amplified (as gain is putLarge device 502) with the Dolby circuit that may need etc., embodiment can consult optical sensor battle array of the present invention shown in Fig. 6The gain control of array apparatus inner light source and Dolby circuit module map.
The circuit that Fig. 6 shows is for to realize light sensing array device inner control circuit of the present invention (as the control of Fig. 3Circuit 36) a kind of embodiment, control circuit is provided with a voltage source V supply, supply light sensor array cartridgePut middle light supply apparatus 601 and operate required electric power, be powered at light supply apparatus 601 and drive luminously, be not limited to radiumPenetrate or light emitting diode (LED), wherein radium-shine is better light source, because it has good space same tone,Can strengthen interference effect.
On circuit, can be provided with current limiter 602, relevant electric signal can be supplied to through certain processing controlThe electric power of light supply apparatus 601, or can feedback related electric signal (such as filtering specific voltage or current signal)To current controller 603, current controller 603 manages the voltage and current of light supply apparatus 601 thus,Comprise that the electric current that light supply apparatus 601 is driven limits.
When light is from surface of light supply apparatus 601 directive, from the light of surface reflection be subject to the present invention discloseSensor array receives, by receiving as the induction unit in the photosensor array device of Fig. 4 or Fig. 5 announcementAfter transfer energy signal to.
Can consult again the sensor array shown in earlier figures 5, wherein be provided with some inoperative induction units, theseInoperative induction unit is not provided as the energy signal of motion-vector judgement, comprises energy state and variationSignal, but can be used as the function of pure judgement optical signal, embodiment as shown in Figure 6, by inoperative senseYing Yuan receives reverberation and the light intensity signal 60 that produces, is adjusted by the first gain controller 604 in circuitJoint signal strength signal intensity, for internal microprocessor 607 references. When obtaining the light intensity being produced by inoperative induction unitDegree signal 60 and outside output voltage V out, signal can be processed through suitable analog-digital converter 605, by electricityGas signal is converted to data signal, feeds back to microprocessor 607, and its object can comprise exposing to the sun of light supply apparatus 601Between the light time, the signal gain of the energy signal of (exposuretime), the first output of multiple inductions regulates (signalgainAdjustment) with noise elimination etc.
Above-mentioned signal strength signal intensity is fed back to microprocessor 607, one of its object regulates optical sensor battle array by this automaticallyThe time for exposure of light supply apparatus 601 (exposuretimeadjustment) in array apparatus. Such as microprocessor607 send a PWM (PWM) controls signal to aforementioned currents controller 603, such as via holding wire611 transfer control signal, by work period (dutycycle) the control light of controlling this PWM control signalThe light period of source apparatus 601, to adjust by the time for exposure, can to produce appropriate time long for control deviceThe optical signal of degree.
In another embodiment, the luminous intensity that the microprocessor 604 in control circuit can be obtained according to deviceSignal is made the measure of optimizing light supply apparatus 601, arrives such as transmitting current controling signal via holding wire 612Current controller 603, regulates drive current by this, can adjust the luminous intensity that light supply apparatus 601 produces. According toThis, the compensation mechanism of adjusting the intensity of light source/brightness and coordinating the adjusting of aforementioned time for exposure to set up, sensingDevice array apparatus can adapt to the surface of more situation, such as different surface textures, with this surperficial distanceDeng.
In addition, the microprocessor 607 in control circuit can also be believed according to the energy being fed back by sensor arrayNumber control the signal gain of each induction unit output, as through holding wire 613 transfer control signal, pass through gain controlDevice 608 processed is controlled the first signal gain of each induction, and can be by being electrically connected the first comparing unit 609 of each inductionCompare the first energy signal and receiving of each induction with reference to mean value.
When microprocessor 607 is obtained after the light intensity signal of being obtained by inoperative induction unit, can be by (controlSignal processed is via holding wire 614) adjust the noise elimination door of setting in comparing unit 609, with dynamic reducingThe inherent noise (noisereduction) of induction unit.
The side of relatively moving on photosensor array application of installation different time energy variation judgment means and surfaceTo, device is first obtained the first energy receiving in surrounding time (t0, t1) of each induction, then calculates surrounding time energyThe mean value of the first received energy of all or part of induction of amount, respectively responds to the obtained energy number of first different timeAfter value (can voltage signal represent) is compared with mean values, can calculate the energy variation of surrounding time.With reference to the energy variation of the proximity sensing unit at different time (t0, t1), can judge surrounding time energy afterwardsThe direction of quantitative change. Finally can judge integrated moving vector by the first energy variation direction of multiple inductions.
The judgement of motion-vector can be with reference to the first light of carrying out of multiple inductions in disclosed device shown in figure 7One of schematic diagram that line tracks.
Fig. 7 shows the induction unit combination 701,702,703,704,705,706 of multiple arrayed, and this example onlySignal is enumerated by adjacent induction is first and is sensed at different time (as very first time t0, the second time t1)Energy variation and the schematic diagram of identification motion-vector.
Wherein t0 and t1 are former and later two sampling times, and H and L represent respectively to be exported by aforementioned comparatorHigh low voltage signal, namely can be considered energy state (being an energy state compared to average energy), mainIf change and judge an overall motion-vector by the voltage signal of surrounding time. Fig. 7 is shown as individualDo not respond to the energy variation at former and later two different times in unit.
Such as signal in the combination 701 of induction unit shows several (at least two) induction unit, wherein left showsIn the time of very first time t0, two induction units sense respectively L and two energy state of H; In the time entering secondBetween when t1, two first energy variation of induction change H and H into. When L, H (t0) change H, H into(t1) time, wherein respond to first energy state and change H into by L, represent the left of substituting by right-hand HPosition, therefore can tentatively judge at this moment between in interval the moving direction of actual induction for left.
And another group of this induction unit combination 701 is responded to unit in the time of very first time t0, energy state is H and L;To the second time t1, energy state is L and L, wherein has being changed by H of a first energy state of inductionFor L, be also to represent the substitute position of left of right-hand L, therefore can judge the movement side having leftTo.
For another example two of induction unit combination 702 interior lefts induction units the energy state of very first time t0 be L withH, to the second time t1 change into L and L, can find out that H wherein substitutes into through the L of left to the rightFor L, therefore preliminary judgement has individual motion-vector to the right.
In like manner, right-hand in induction unit combination 702 has two induction units at the energy state of very first time t0 to beH and L, to changing and become H and H when the second time t1, wherein right-hand L replaces through the H of left afterwardsBenefit changes H into, therefore can judge individual motion-vector to the right.
Not arrow sign direction of induction unit combination 705 and 706 in figure, multiple senses in judging for this reason exampleYing Yuan does not have energy variation in the time interval of very first time t0 and the second time t1, or cannot pass through itMiddle energy variation is judged moving direction, such as induction unit combination 706 is L at very first time t0 energy stateWith H, to the second time t1, energy state changes H and L into, and this is to change by energy stateJudge moving direction. Therefore, these two kinds of aspects do not have effective output signal.
In the time that the whole induction unit of former and later two times has all judged separately the direction of energy variation, can entiretyJudge an overall motion-vector.
The mode of another moving direction judgement is illustrated in figure 8 induction chip in disclosed device and holdsTwo of the schematic diagram that row light tracks. The conversion direction of the induction unit energy state of this example by different time withThe method schematic diagram of identification motion-vector, wherein X is negligent value, for t0 and t1 institute induced signalComparison, judges motion-vector by this.
In the time that induction chip receives reverberation, the multiple inductions unit in induction chip at different time according to connecingWhen the signal energy of receiving and average energy compare, produce and have height varying voltage signal, as Fig. 8 shows generationThere is induced signal " "; In some cases, still likely the induction of part unit does not have energy variation, orThe height of person's independent voltage signal, now as Fig. 8 is shown as negligent value " X ".
According to the enforcement aspect shown in Fig. 8, in induction unit combination 801, through aforementioned comparator at first o'clockBetween t0 obtain the first energy variation of adjacent induction, be expressed as state " X ", wherein " X " is for paying no attention toValue, " " indicates height voltage change; Obtain the first energy variation of several adjacent inductions at the second time t1,Be expressed as state " X ". The energy state first through each induction of very first time t0 and the second time t1 changes,This routine show state " X " changes " X " into, can judge that " " is to left dislocation (shift),Therefore can judge that this induction unit combination 801 has a variation being moved to the left, as shown by the arrows in Figure 8.
In induction unit combination 802, wherein adjacent induction unit is expressed as in the energy variation of very first time t0State " X ", in the time of the second time t1, energy state is expressed as " X ", now as seen through the timeChange after (t0 is to t1), wherein state " " shows the trend of displacement to the right. Therefore, institute of the present inventionThe invention disclosing can utilize the energy variation of this surrounding time to judge the moving direction of single unit system.
It is worth mentioning that, in the time judging moving direction, because sensor array has been taked in invention, therefore micro-Little error can't affect the result of entirety judgement. If autonomous tracing in intelligent vehicle is applied on computer optics mouse,The travel frequency of general user's operating mouse is far below the processing speed as control circuit wherein, and some slowly changeThe referential data becoming can't affect entirety judgement.
In sum, a kind of photosensor array device provided by the invention, is integrated in semiconductor encapsulation,Can effectively constrain by this inner intrinsic noise (intrinsicnoise), and propose dynamically to adjust light sourceIntensity or brightness and the compensation mechanism that coordinates the adjusting of time for exposure to set up, make the sensor array device canTo adapt to more sensitive surface.
The above is the preferred embodiment of the present invention, it should be pointed out that the common skill for the artArt personnel, under the premise without departing from the principles of the invention, can also make some improvements and modifications, thisA little improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a photosensor array device, is characterized in that, comprising:
The induction unit of multiple array format, composition one sensor array, is wherein provided with multiple inoperative sensesYing Yuan, this sensor array is for being received from the light of a surface reflection;
Multiple comparators, induction unit of the corresponding connection of each comparator, for comparing two energy letters of inputNumber, one is the energy signal that this induction unit produces, and is separately a mean value;
One light supply apparatus, for generation of this surperficial light of incident; And
One control circuit, is electrically connected the plurality of induction unit, the plurality of comparator and this light supply apparatus, forControl this light supply apparatus and produce this light, and obtain the first energy signal of the plurality of induction, and judge by thisThe capacity volume variance that disturb in the space that surface reflection forms.
2. photosensor array device as claimed in claim 1, is characterized in that, this light supply apparatus is oneThe light source that space same tone is good.
3. photosensor array device as claimed in claim 1, is characterized in that, this light supply apparatus is oneLaser light device.
4. photosensor array device as claimed in claim 1, is characterized in that, this control circuit passes throughControl the work period of a PWM control signal to control the light period of this light supply apparatus.
5. photosensor array device as claimed in claim 1, is characterized in that, this control circuit is also movingState regulates the gain of the energy signal of the first output of the plurality of induction.
6. the photosensor array device as described in claim 5, is characterized in that this control circuit rootIncrease according to respectively responding to first signal by the energy signal control of first this sensor array feedback forming of the plurality of inductionBenefit.
7. photosensor array device as claimed in claim 5, is characterized in that, this control circuit is connecingReceive after the first energy signal of the plurality of induction, only capture wherein all or part of work and respond to first energy letterNumber, calculate this mean value.
8. photosensor array device as claimed in claim 1, is characterized in that, this control circuit is adjustedThe luminous intensity that this light supply apparatus produces.
9. photosensor array device as claimed in claim 8, is characterized in that, this control circuit basisRegulated the drive current of this light supply apparatus by the obtained light intensity signal of the plurality of inoperative induction unit, to adjustThe luminous intensity that whole this light supply apparatus produces.
10. photosensor array device as claimed in claim 9, is characterized in that, this inoperative induction unitBe located at this sensor array around.
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| CN201310259048.XA CN103324304B (en) | 2013-06-26 | 2013-06-26 | Photosensor array device |
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| CN103324304B true CN103324304B (en) | 2016-05-11 |
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| WO2014205705A1 (en) * | 2013-06-26 | 2014-12-31 | 林大伟 | Light sensor array device |
| CN104932714A (en) * | 2014-03-19 | 2015-09-23 | 张云山 | Pen type optical indicating device and control method thereof |
| CN105266759A (en) * | 2014-05-26 | 2016-01-27 | 义明科技股份有限公司 | Physiological signal detection device |
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| CN101460857A (en) * | 2006-04-04 | 2009-06-17 | 应用材料合资公司 | Light-assisted testing of an optoelectronic module |
| CN203376690U (en) * | 2013-06-26 | 2014-01-01 | 林大伟 | Light sensor array device |
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| CH697495B1 (en) * | 2005-04-01 | 2008-11-14 | Baumer Electric Ag | Optical sensor and method for suppressing stray light errors. |
| KR101158233B1 (en) * | 2008-09-26 | 2012-06-19 | 엔엑스피 비 브이 | System and method for detecting movement of an object and integrated circuit implementation thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101460857A (en) * | 2006-04-04 | 2009-06-17 | 应用材料合资公司 | Light-assisted testing of an optoelectronic module |
| CN203376690U (en) * | 2013-06-26 | 2014-01-01 | 林大伟 | Light sensor array device |
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Effective date of registration: 20220424 Address after: 518000 Room 101, building A5, No. 168, Changshan Industrial Zone, Liulian community, Pingdi street, Longgang District, Shenzhen, Guangdong Patentee after: Shenzhen baihexin Semiconductor Co.,Ltd. Address before: 518000 No. 168, Changshan Industrial Zone, Liulian community, Pingdi street, Longgang District, Shenzhen, Guangdong Patentee before: Lin Dawei Patentee before: Zhang Yunshan |