CN103324304A - Optical sensor array device - Google Patents
Optical sensor array device Download PDFInfo
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- CN103324304A CN103324304A CN201310259048XA CN201310259048A CN103324304A CN 103324304 A CN103324304 A CN 103324304A CN 201310259048X A CN201310259048X A CN 201310259048XA CN 201310259048 A CN201310259048 A CN 201310259048A CN 103324304 A CN103324304 A CN 103324304A
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Abstract
An optical sensor array device comprises sensing elements, a comparison circuit, a laser light source, a control circuit and a compensation mechanism. The sensing elements are arrayed in a plurality of forms to form a sensor array. The comparison circuit can calculate energy state of the sensing elements. The comparison circuit is connected with the sensing elements. The control circuit can acquire energy signals of the sensing elements and judge energy difference, caused by surface reflection, of space interference. The compensation mechanism is built by adjusting light source intensity and matching exposure time. The optical sensor array device can be applicable to surfaces under multiple conditions.
Description
Technical field
The relevant a kind of photosensor array device of the present invention particularly a kind ofly adopts a plurality of sensor array devices that form with the induction chip of array format.
Background technology
Optical sensor is for by such as the CMOS(CMOS (Complementary Metal Oxide Semiconductor)), the CCD(Charged Coupled Device) etc. sensing component the light of acceptance is converted to electric signal, general technology can be obtained by this class component the intensity (energy) of specific light source, accordingly can judging distance (as range sensor), along with the energy variation of time, even as the assembly of image capture.
Optical indicating device such as computer mouse, the judgement that can utilize optical sensor to move as track when the light directive one running plane that produces, can be processed by energy variation, image that surrounding time receives and judge a motion-vector.The internal circuit schematic diagram of optical mouse 10 as shown in Figure 1, optical mouse 10 is mobile on a surface 11, the primary clustering of mouse case 12 internal circuits is except some optical modules, circuit part is provided with a circuit board 14, circuit board 14 is provided with the controller 18 of a control and computing utilizing emitted light and sensor light, and a light source 16 and sensor 19.
Have one towards the fluting 17 of outer surface 11 on the shell 12 of this optical mouse 10, this circuit board 14 namely is located near this fluting (aperture) 17, and circuit board 14 is provided with the light source 16 such as radium-shine or light emitting diode (LED).When this optical mouse 10 running, light source 16 produces utilizing emitted light continuously, with special angle directive surface 11, represent such as dotted line among the figure, obtain catoptrical signal through sensor 19, the image of perhaps obtaining intensity of reflected light distributes (can be CMOS or CCD image sensor such as sensor 19), and controller 18 namely analyzes the moving direction of optical mouse 10.
In the technology that the track of the aforementioned optical mouse of knowing 10 is judged, quite rely on by the surface 11 catoptrical signals of obtaining, the function of therefore general optical mouse 10 will have different performances along with the form on surface 11.
In the purpose that light tracks, general technology will be transparent or be difficult for reflective material and produce and judge failed problem because of surface structure, causes and can't track, and also just possible so that relevant apparatus (such as optical mouse) can't operate smoothly.
In the prior art, if the device that wish allows light track is still possessed the function that necessarily tracks on Different Plane, obtain light and move that the mode of conduct uses extra outside location sensing or some complex calculations more, but these location sensings or computing are because the algorithm of the restriction of sensitivity, highly energy-consuming and complexity etc. are former thereby be only applicable on the limited plane sample attitude.These optical sensors of knowing can not be applicable to all high reflections or very on 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 existing light tracing device and can't possess in Different Plane and track function and can't be applicable to all high reflections or the problem on the plane of antiradar reflectivity very.
The present invention is achieved in that a kind of photosensor array device, comprising:
The induction unit of a plurality of array format forms a sensor array, wherein is provided with a plurality of puppets and responds to unit, and this sensor array is used for being received from the light of a surface reflection;
A plurality of comparers, induction unit of the corresponding connection of each comparer is used for two energy signals that comparison is inputted, and one is a mean value for the energy signal that this induction unit produces in addition;
One light supply apparatus, for generation of incident should the surface light; And
One control circuit, be electrically connected this a plurality of inductions unit, these a plurality of comparers and this light supply apparatus, produce this light for this light supply apparatus of control, and obtain the first energy signals of this a plurality of inductions, and judge the capacity volume variance of the space interference that is formed by this surface reflection.
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 pulse-width modulation control signal is to control the light period of this light supply apparatus.
Further, the also gain of the energy signal of the first output of these a plurality of inductions of dynamic adjustments of this control circuit.
Particularly, this control circuit is according to the first signal gain of each induction of energy signal control by first this sensor array feedback that forms of these a plurality of inductions.
Particularly, this control circuit only captures the energy signal that wherein all or part of non-puppet responds to unit after receiving the first energy signal of these a plurality of inductions, calculate this mean value.
Particularly, this control circuit is adjusted the light intensity that this light supply apparatus produces.
Particularly, this control circuit basis is responded to the drive current that the obtained light intensity signal of unit is regulated this light supply apparatus, the light intensity that produces to adjust this light supply apparatus by these a plurality of puppets.
Particularly, this puppet respond to unit be located at this sensor array around.
Provided by the inventionly a kind ofly carry out method and the light tracing device that light tracks according to reflection interference, the image of the light of its application surface reflection and destruction interference constructive with the light between the former utilizing emitted light, foundation as the identification that tracks, can on the plane of various sample attitudes, still have the function that tracks, be applicable to all high reflections or very on the plane of antiradar reflectivity.
Description of 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 the sensor array schematic diagram that is packaged in the photosensor array device of the present invention in the integrated circuit;
Figure 4 shows that the embodiment schematic diagram of the sensor array that apparatus of the present invention adopt;
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 each induction unit of photosensor array device of the present invention carries out one of schematic diagram of light autonomous tracing in intelligent vehicle;
Figure 8 shows that in the photosensor array device of the present invention each induction unit carry out the light autonomous tracing in intelligent vehicle schematic diagram two.
[symbol description]
Reflected light 203
Respond to first 301 light supply apparatuses 34
Range of exposures 303 control circuits 36
Induction unit 401,402,403,404,405
Comparer 421,422,423,424,425
Add up device 501 gain amplifiers 502
The puppet responds to unit 511,512,513,514,515,516
Induction unit 521,522,523,524
Voltage source V supply light supply apparatus 601
Restrictor 602 current controllers 603
The first gain controller 604 microprocessors 607
Analog-digital converter 605 second gain controllers 608
Induction unit combination 701,702,703,704,705,706
Average voltage signal Vavg direction X, Y
Very first time t0 the second time t1
Induction unit combination 801,802.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described.
The present invention describes a kind of photosensor array device, namely a kind of have a sensor array that forms with the induction chip of array format, one of embodiment is used for being received from the light of a surface reflection, and then the energy of reflection light that receives according to a plurality of induction chips is judged the constructive or destruction interference image in the reflected light, judge a motion-vector by surrounding time judgement energy variation, if be applied in the light indicating device, then can judge its apparent surface's moving direction.
For instance, if take optical mouse as example, if light source adopts same light modulation (coherent light) or says that the good light of a kind of space same tone (spatial coherence) is as light source, detecting moving direction by using by this, and can be in conjunction with the mode of sensitivity compensation (sensitivity compensation), utilize a kind of light algorithm (movement recognition algorithm) that tracks, simultaneously can noise reduction, therefore the relevant device of this technology that adopts goes on the plane of various aspects.
It is worth mentioning that, can adopt the integrated encapsulation technology of a kind of people having the same aspiration and interest light source (coherent light source package integration) in the photosensor array device proposed by the invention, adopt the device of this type of technology, such as optical indicating device, extra optical lens or specific image sensor need not be installed, such as a kind of CMOS image sensor (CMOS image sensor, CIS).
Because prior art adopts the device (such as optical mouse) of general optical sensor can not be applicable to all high reflections or very on the plane of antiradar reflectivity, the present invention then proposes a kind of photosensor array device, by comprising a plurality of induction chips with array format and the corresponding algorithm that tracks, reach the purpose that effectively tracks.Wherein the embodiment good light sources of space same tone (spatial coherence) such as laser light of also can arranging in pairs or groups provide the track ability good such as devices such as optical mouse accordingly.The present invention produces image constructive and destruction interference with the light of application surface reflection, as the foundation of the identification that tracks.
Please produce the schematic diagram that incident light 201 directives one plane reflects to form a plurality of reflected light 203 again referring to shown in Figure 2 by a specific light source device (not being shown among Fig. 2) first, light source particularly adopts a kind of as radium-shine same light modulation (coherent light), and " same light modulation " described herein refers to the good light of a kind of space same tone.
A plurality of optical paths that this Fig. 2 shows comprise plane with surface structure 205 of incident light 201 directives, reflect to form reflected light 203 again.Because microcosmic surface structure 205 is irregular structure, so reflected light 203 forms the light that different directives are arranged as shown in Figure 2.
Light supply apparatus produces incident light 201 directive planes continuously, and reflect to form reflected light 203, reflected light 203 receives via sensor (not being shown among Fig. 2) in the process, produce the constructive image (pattern) with destruction interference of light in the various optical paths, used especially the incident light of people having the same aspiration and interest light source can to strengthen this interference effect (interference effect) herein.
When the device that is loaded with the interlock circuit of carrying out this autonomous tracing in intelligent vehicle with respect to sense plane (X-Y plane) when moving, wherein optical sensor receives the information of reflected light 203, again according to the time interval (time slot) sampling (sampling) information data wherein, and the average energy value of obtaining reflected light 203, and calculate the capacity volume variance of reflected light 203 different times, diverse location.Disclosed photosensor array device adopts sensor array (sensor array) obtaining reflected light 203 diverse location energy, and with the difference of the average energy value, can judge motion track.Wherein the calculating of reflected light 203 mean values can be adopted the average of energy that whole induction unit obtains, the perhaps average energy obtained of part induction unit is such as the computing reference take row (such as the directions X of Fig. 5) mean value or row (such as the Y-direction of Fig. 5) mean value as mean value; Also may take the average energy of periphery or center section as reference mean value.
According to one of embodiment that adopts the sensor array, if take with light modulation as light source, can strengthen the interference effect of reflection ray.Be a kind of light source that has very little phase delay (phase delay) in Yi Bobao (wave envelope) with light modulation, wherein laser light namely is a kind of same light modulation, is different from the non-same light modulations such as sunshine or LED light.
Application in the photosensor array device that the present invention discloses, can improve the sensitivity of the optical sensor of sensing reflected light interference with light modulation with light modulation.Because the characteristic of very little phase differential (phase difference) is arranged with light modulation, disturb (spatial interference) with respect to the space that non-people having the same aspiration and interest reflection of light light produces, have less phase delay (phase delay) phenomenon with light modulation.Therefore, adopt with light modulation to add the advantage that disturb in the strong reflection space, sensor as aforementioned array (for light) can be obtained through the space of a plane reflection light and disturb difference.
Sensor array can be consulted the schematic diagram that is packaged in the sensor array in the integrated circuit (IC) in the photosensor array device of the present invention shown in Figure 3.
Be presented at the sensor array 32 on the photosensor array device interior circuit board 30 among Fig. 3, the photosensor array device can be applicable on optical mouse or the specific indicating device, sensor array 32 includes a plurality of inductions first 301 of array format, technology by this integrated encapsulation is packaged in (integrated optical sensor array on IC) in the integrated circuit, comprise in one embodiment, make simultaneously the integrated control circuit 36 of sensor array 32 and circuit, the first 301(of a plurality of inductions is that non-puppet responds to unit especially on the sensor array 32, have fixing spacing and uniform relative position as shown in Figure 5), with the light of average received through particular surface/plane reflection.As shown in Figure 3, by the range of exposures 303 on a light supply apparatus 34 emission of lights to a plane, light directive sensor array 32 behind plane reflection afterwards, wherein each induction unit 301 receives respectively the reflected light of different directions, by suitable photosignal conversion, control circuit 36 in the device can calculate the mean value that adds up each induction unit 301 energy that receive after obtaining signal with interlock circuit, then calculate again the difference of each induction unit 301 and mean value, relevant control circuit will be judged the capacity volume variance (spatial interference difference) that draws the space interference that is formed by a surface or plane reflection according to this, and the capacity volume variance that control circuit 36 calculates according to accumulation before and after each time interval (time slot) is judged moving direction.
The photosensor array device that above-described embodiment discloses, disturb in so-called space, when light (particularly same light modulation, but invention is not limited to same light modulation) directive has behind the surface of irregular surface structure again reflection produce the reflected light of different directions and the light that produces disturbs (interference), this light produces constructive or destructive interference pattern after reflection, afterwards, obtained because behind the spatial information of relative motion (relative motion on device and plane) plane reflection, be based upon the Mobile data on the X-Y plane by sensor array.
As shown in Figure 3, especially in an embodiment, the carrier that invention institute discloses application photosensor array device can be a optical indicating device take laser light as light source, such as optical mouse, wherein the main circuit assembly comprises the light supply apparatus 34 of being located on the circuit board 30, light for generation of an incidence surface, include sensor array 32, a plurality of inductions first 301 with array format are wherein arranged, and include aforesaid control circuit 36, control circuit 36 couples light supply apparatus 34 and sensor array 32, be used for obtaining the light signal that the first 301 interior a plurality of inducing pixels of a plurality of inductions receive, and the calculating energy state, and computing time the interval energy state change.
Fig. 4 follows the embodiment schematic diagram that sensor array running calculating energy that the display light sensor array device adopts distributes.
Fig. 4 has shown the layout of sensor array, and a plurality of induction unit is distributed on the X-Y plane, forms the sensor array of NxM, and the form of sensor array is not limited to the geometric configuratioies such as symmetrical rectangle, square, circle, ellipse, can decide according to practical application.Sensor array comprises a plurality of inductions unit 401,402,403,404,405 of array format, respectively along X, and the Y-direction setting, actual quantity is not limited to this schematic diagram.Lay these induction units 401,402,403,404, primary clustering also has a plurality of comparers 421,422,423 on 405 the circuit board, 424,425, induction unit of the corresponding connection of each comparer, input value is the average voltage signal Vavg of the energy of each induction unit generation, be used for relatively responding to unit and sense resulting voltage signal behind the light, can relatively obtain the signal value of high low-voltage.At last, control circuit is namely obtained adjacent two sensor values comparison results, makes the judgement of moving direction.
Be coupled to induction unit 401 such as comparer among Fig. 4 421, one of them input signal is namely responded to the energy signal that 401 sensings of unit produce, can use the voltage signal indication, another input end then is average voltage signal Vavg, therefore comparer 421 is compared these two input signals, can export a comparative result, the present invention preferably represents this comparative result with a binary feature value (binary characteristic value), the high low voltage signal that represents respectively such as H shown in Figure 7 or L.
According to inventing in the photosensor array device of putting down in writing, the mode of utilizing sensor array to track is characterised in that the energy distribution (energy pattern) that shows in the constructive and destructive interference pattern that utilizes light (being preferably same light modulation) to form behind plane reflection, judge motion-vector by the energy distribution variation of different time.Wherein embodiment is such as adopting a kind of irrelevant viewpoint to move the mode of judgement (non-relative view points to do movement judgment), the energy information of induction unit around namely introducing is with the average inductive energy judgement moving direction of comparing.It is worth mentioning that, this is different from the mode that general using image pixel (pixel) information is judged motion-vector, and the present invention changes by employing time and calculating energy to judge motion track.
For photosensor array device itself, according to one of embodiment, in the induction chip layout of photosensor array device of the present invention, induction chip comprises the induction unit with arrayed, first can comprising is located at the induction unit (be called the puppet and respond to unit) that does not act on every side in these inductions, and the work induction unit that is located at the responsible reception light of middle body, therefore behind the control circuit in the photosensor array device or correlation computations circuit energy signals through obtaining all induction units, only acquisition wherein the non-puppet energy signal of responding to unit continue follow-up utilization.Consult induction unit schematic layout pattern shown in Figure 5.
Fig. 5 shows that a plurality of inductions that are provided with in the induction chip with array format are first, the outer puppet's sensor (dummy sensor) that is arranged with in the induction unit of middle body, purpose is so that whole induction chip processing procedure is more even, also can be therefore so that more even sensing energy.Fig. 5 shows that the puppet around being located at responds to unit 511,512,513,514,515,516 and is made as idle induction unit, and 521,522,523,524 in the induction unit that is located at close center section is the inductive component of main induction light heat input.
When the induction unit of an array format exposes simultaneously in a reflected light, wherein can uniform induction to the induction unit of light for being partial to the inductive component of middle body, then may there be the possibility that receives inhomogeneous energy in induction unit on every side, therefore when the gross energy that the whole induction chip of totalling receives, can respond to unit (511 by setting the puppet, 512,513,514,515,516) get rid of the energy value that jitter may occur for these, and can obtain the reference energy value that relatively has reference value.
As shown in Figure 5, circuit is provided with a totalling device 501, be electrically connected to each induction unit in the induction chip, can obtain the photo-signal of each induction unit, and can be converted into magnitude of voltage by analog digital, but because it is minimum respectively to respond to the photocurrent of first receiving optical signals in the induction chip, need to just can obtains effective referential data by the stage that gain is amplified, and can follow obtained energy variation before and after the computing time of the interval.According to this embodiment, these photo-signals form output signal of output, such as the signal that represents with output voltage V out after gain amplifier 502 is processed; Export according to the energy signal calculating mean value of effectively obtaining through a counter 503 in addition, output is such as average voltage signal Vavg.
Afterwards, aforementioned output signal (such as output voltage V out) will export comparer as shown in Figure 4 to mean value (such as average voltage signal Vavg), allow comparer can compare energy signal and a reference value (average energy first such as all or part of induction) of induction unit, obtain by this energy state of this induction unit, in fact each induction unit can high with digital form (H) represent energy state with low (L).
Primary clustering in the photosensor array device is except aforementioned induction unit, light source and control circuit with array format, also integrated the gain amplifying circuit (such as gain amplifier 502) that signal is amplified and the Dolby circuit that may need etc. in an embodiment, embodiment can consult gain control and the Dolby circuit module map of photosensor array device inner light source of the present invention shown in Figure 6.
The circuit that Fig. 6 shows is for realizing a kind of embodiment of light sensing array device inner control circuit of the present invention (such as the control circuit 36 of Fig. 3), control circuit is provided with a voltage source V supply, the required electric power of light supply apparatus 601 runnings in the supply light sensor array device, being powered at light supply apparatus 601 drives luminous, be not limited to radium-shine or light emitting diode (LED), wherein radium-shinely be better light source, because it has good space same tone, can strengthen interference effect.
Can be provided with restrictor 602 on the circuit, relevant electric signal can be supplied to through certain processing controls the electric power of light supply apparatus 601, or but feedback related electric signal (such as filtering specific voltage or current signal) is to current controller 603, the voltage and current of 603 pairs of light supply apparatuses 601 of current controller manages thus, comprises that the electric current that light supply apparatus 601 is driven limits.
When light from surface of light supply apparatus 601 directives, be subject to the sensor array that the present invention discloses from the light of surface reflection and receive, by as the photosensor array device that discloses of Fig. 4 or Fig. 5 in the reception of induction unit after transfer energy signal to.
Can consult again aforementioned sensor array shown in Figure 5, wherein be provided with some puppets and respond to unit, these puppets respond to unit and are not provided as the energy signal that motion-vector is judged, the signal that comprises energy state and variation, but can be used as the function of pure judgement light signal, embodiment as shown in Figure 6 responds to that unit receives reflected light and the light intensity signal 60 that produces by the puppet, by the first gain controller 604 adjusting signal intensities in the circuit, for internal microprocessor 607 references.Respond to light intensity signal 60 that unit produces and outside the output voltage V out when obtaining by the puppet, signal can be processed through suitable analog-digital converter 605, be digital signal with transform electric, feed back to microprocessor 607, its purpose can comprise that the signal gain of the energy signal of the time shutter (exposure time) of light supply apparatus 601, a plurality of induction unit output regulates (signal gain adjustment) and noise elimination etc.
Above-mentioned signal intensity is fed back to microprocessor 607, one of its purpose is regulated the time shutter (exposure time adjustment) of light supply apparatus 601 in the photosensor array device by this automatically.Send a pulse-width modulation (PWM) such as microprocessor 607 and control signal to aforementioned currents controller 603, such as via signal wire 611 transfer control signal, controlled the light period of light supply apparatus 601 by the work period (duty cycle) of this pulse-width modulation control signal of control, control device can produce the light signal of appropriate time length to adjust by the time shutter.
In another embodiment, microprocessor 604 in the control circuit can be made the measure of optimizing light supply apparatus 601 according to the obtained light intensity signal of device, such as transmitting current controling signal to current controller 603 via signal wire 612, regulate by this drive current, can adjust the light intensity that light supply apparatus 601 produces.Accordingly, the compensation mechanism of adjusting the intensity of light source/brightness and cooperating the adjusting of aforementioned time shutter to set up, sensor array device can adapt to the surface of more situation, such as different surface structures, with the distance on this surface etc.
In addition, microprocessor 607 in the control circuit can also be according to the signal gain of being controlled each induction unit output by the energy signal of sensor array feedback, as through signal wire 613 transfer control signal, by the signal gain of each induction unit of gain controller 608 controls, and the energy signal and that can receive by each the induction unit of comparing unit 609 comparisons that is electrically connected each induction unit is with reference to mean value.
When microprocessor 607 obtain responded to the light intensity signal that unit obtains by the puppet after, can adjust the noise of setting in the comparing unit 609 by (control signal is via signal wire 614) and eliminate door, with the inherent noise (noise reduction) of dynamic reducing induction unit.
The direction that relatively moves on photosensor array application of installation different time energy variation judgment means and surface, device is obtained first each induction unit in surrounding time (t0, t1) energy that receives, calculate again the mean value of the first received energy of all or part of induction of surrounding time energy, after each is responded to the obtained energy values of first different time (can voltage signal represent) and compares with mean values, can calculate the energy variation of surrounding time.Afterwards reference can be judged the direction of surrounding time energy variation in the energy variation of the proximity sensing unit of different time (t0, t1).Can judge the integrated moving vector by the first energy variation direction of a plurality of inductions at last.
The judgement of motion-vector can be carried out with reference to a plurality of induction units in the disclosed device shown in Figure 7 one of schematic diagram that light tracks.
Fig. 7 shows the induction unit combination 701,702,703 of a plurality of arrayed, 704,705,706, this example only illustrates to enumerate the energy variation that senses at different time (such as very first time t0, the second time t1) by adjacent induction unit and the schematic diagram of identification motion-vector.
Wherein t0 and t1 are former and later two sampling times, H and L represent respectively the high low voltage signal exported by aforementioned comparer, namely can be considered energy state (be an energy state compared to average energy), mainly is that the voltage signal by surrounding time changes the motion-vector of judging an integral body.Fig. 7 is shown as in the indivedual induction unit energy variation at former and later two different times.
Show several (at least two) induction unit such as signal in the combination 701 of induction unit, when wherein left was presented at very first time t0, two induction units sensed respectively L and two energy state of H; When entering the second time t1, the energy variation of two induction units then changes H and H into.As L, H(t0) change H, H(t1 into) time, wherein the energy state of induction unit changes H into by L, expression is by the substitute position of left of right-hand H, therefore can tentatively judge at this moment between in the interval moving direction of actual induction for left.
And another group of this induction unit combination 701 is responded to unit when very first time t0, and energy state is H and L; To the second time t1, energy state then is L and L, and what the first energy state of induction was wherein arranged changes L into by H, also is the substitute position of left of right-hand L of expression, therefore can judge a moving direction that has left.
Two of induction unit combination 702 interior lefts induction units are L and H at the energy state of very first time t0 for another example, to the second time t1 change into L and L, can find out that wherein H substitutes through the L of left to the right becomes L, therefore tentatively judges a motion-vector that has to the right.
In like manner, it is H and L at the energy state of very first time t0 that there are two induction units on right-hand in the induction unit combination 702, to changing during the second time t1 and becoming H and H, wherein right-hand L changes H into through the H of left substitute afterwards, therefore can judge a motion-vector to the right.
When the direction of energy variation has all been judged separately by the whole induction unit of former and later two times, can whole judge an overall motion-vector.
The mode that another moving direction is judged is illustrated in figure 8 as induction chip in the disclosed device and carries out two of schematic diagram that light tracks.The conversion direction of the induction unit energy state of this example by different time is with the method schematic diagram of identification motion-vector, and wherein X is negligent value, and@is comparing of t0 and t1 institute induced signal, judges by this motion-vector.
When induction chip receives reflected light, a plurality of induction unit in the induction chip different time according to the signal energy that receives with average energy relatively the time, producing has the height varying voltage signal, shows that such as Fig. 8 generation has induced signal " "; In some cases, still might induction unit partly not have energy variation, perhaps the height of independent voltage signal is shown as negligent value " X " such as Fig. 8 at this moment.
According to enforcement aspect shown in Figure 8, in induction unit combination 801, obtain the first energy variation of adjacent induction through aforementioned comparer in very first time t0, be expressed as state " X ", wherein " X " is the value of paying no attention to, " " expression has the height change in voltage; 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 that is moved to the left, as shown by the arrows in Figure 8.
In induction unit combination 802, wherein adjacent induction unit is expressed as state "@@X " in the energy variation of very first time t0, when the second time t1, energy state is expressed as " X@@", this moment, as seen after the time changed (t0 is to t1), wherein state "@@" showed the trend of displacement to the right.Therefore, disclosed invention can utilize the energy variation of this front and back time to judge the moving direction of single unit system.
It is worth mentioning that, when judging moving direction, because sensor array has been taked in invention, therefore small error can't affect the whole result who judges.If autonomous tracing in intelligent vehicle is applied on the computer optics mouse, such as the processing speed of control circuit, some referential datas that slowly change can't affect whole judgement to the travel frequency of general user's operating mouse far below wherein.
In sum, a kind of photosensor array device provided by the invention, be integrated in the semiconductor encapsulation, can effectively constrain by this inner intrinsic noise (intrinsic noise), and propose dynamically to adjust the compensation mechanism that the intensity of light source or brightness and the adjusting of cooperation time shutter are set up, so that sensor array device can adapt to more sensitive surface.
The above is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (10)
1. a photosensor array device is characterized in that, comprising:
The induction unit of a plurality of array format forms a sensor array, wherein is provided with a plurality of puppets and responds to unit, and this sensor array is used for being received from the light of a surface reflection;
A plurality of comparers, induction unit of the corresponding connection of each comparer is used for two energy signals that comparison is inputted, and one is a mean value for the energy signal that this induction unit produces in addition;
One light supply apparatus, for generation of incident should the surface light; And
One control circuit, be electrically connected this a plurality of inductions unit, these a plurality of comparers and this light supply apparatus, produce this light for this light supply apparatus of control, and obtain the first energy signals of this a plurality of inductions, and judge the capacity volume variance of the space interference that is formed by this surface reflection.
2. photosensor array device as claimed in claim 1 is characterized in that, this light supply apparatus is the good light source of a space same tone.
3. photosensor array device as claimed in claim 1 is characterized in that, this light supply apparatus is a laser light device.
4. photosensor array device as claimed in claim 1 is characterized in that, the work period of this control circuit by controlling a pulse-width modulation control signal is 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 the gain of the energy signal of the first output of these a plurality of inductions of dynamic adjustments also.
6. such as claim 5 a described photosensor array device, it is characterized in that, this control circuit is according to the first signal gain of each induction of energy signal control by first this sensor array feedback that forms of these a plurality of inductions.
7. photosensor array device as claimed in claim 5 is characterized in that, this control circuit only captures the energy signal that wherein all or part of non-puppet responds to unit after receiving the first energy signal of these a plurality of inductions, calculate this mean value.
8. photosensor array device as claimed in claim 1 is characterized in that, this control circuit is adjusted the light intensity that this light supply apparatus produces.
9. photosensor array device as claimed in claim 8 is characterized in that, this control circuit basis is responded to the drive current that the obtained light intensity signal of unit is regulated this light supply apparatus, the light intensity that produces to adjust this light supply apparatus by these a plurality of puppets.
10. photosensor array device as claimed in claim 9 is characterized in that, this puppet respond to unit be located at this sensor array around.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310259048.XA CN103324304B (en) | 2013-06-26 | 2013-06-26 | Photosensor array device |
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| CN201310259048.XA CN103324304B (en) | 2013-06-26 | 2013-06-26 | Photosensor array device |
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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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| WO2010035240A2 (en) * | 2008-09-26 | 2010-04-01 | Nxp B.V. | System and method for detecting movement of an object and integrated circuit implementation thereof |
| CN203376690U (en) * | 2013-06-26 | 2014-01-01 | 林大伟 | Light sensor array 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 |
| WO2010035240A2 (en) * | 2008-09-26 | 2010-04-01 | Nxp B.V. | System and method for detecting movement of an object and integrated circuit implementation thereof |
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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 |