CN1677431A - Optical mouse and image fetching chip thereof - Google Patents
Optical mouse and image fetching chip thereof Download PDFInfo
- Publication number
- CN1677431A CN1677431A CN 200410033332 CN200410033332A CN1677431A CN 1677431 A CN1677431 A CN 1677431A CN 200410033332 CN200410033332 CN 200410033332 CN 200410033332 A CN200410033332 A CN 200410033332A CN 1677431 A CN1677431 A CN 1677431A
- Authority
- CN
- China
- Prior art keywords
- exposure
- image
- parameter values
- exposure parameter
- region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Image Input (AREA)
Abstract
The image picking up chip includes image sensor composed of multiple sensing units, computation logic circuit, and logic circuit for updating exposure parameter. If exposure expresses quantity of the first exposure zone, then value of the exposure parameter is unchanged in order to pick up next image by the image sensor; if exposure expresses quantity of the second exposure zone, then the value of the exposure parameter is adjusted based on the exposure parameter and the extreme value of the first exposure parameter in order to pick up next image by the image sensor; if exposure expresses quantity of the third exposure zone, then, the value of the exposure parameter is adjusted based on the exposure parameter and the extreme value of the second exposure parameter in order to pick up next image by the image sensor.
Description
Technical field
The present invention relates to a kind of capturing images chip of optical mouse, but the particularly capturing images chip of accelerated light exposure speed.
Background technology
Along with prevailing of audio-visual multimedia, digital pictureization becomes trend gradually, and replaces the electronic equipment of traditional analog formula gradually, and for example the arriving in image digitazation epoch is being represented in the release of products such as digital camera, digital camera and optical mouse.And in the said goods, most important assembly promptly is the image sensor in order to the average exposure of control figure image; This image sensor is a principle of utilizing the egative film exposure, adjust the exposure parameter of this image sensor inside according to the luminosity (illumination) of an image, in order to decision time shutter and average exposure, therefore, when the luminosity of this image is over-exposed or under-exposed, then see through the exposure parameter of adjusting this image sensor, the average exposure of this image sensor can be converged to the normal exposure amount.
Figure 1A is the synoptic diagram of the typical complementary MOS image sensor chip of expression (CMOSimage sensor chip) 10.Wherein, pixel cell PIX11-PIXnm represents single image element circuit respectively, when image sensing chip 10 reads an image, at first utilizes signal read circuit 130 once to read the mode of delegation, the picture element signal in this array 100 of access; Then, a plurality of picture element signals that utilize amplifier 150 will be stored in order in the sensing circuit 130 amplify; Gradation converts a plurality of picture element signals to digital signal with this analog/digital converter 170, does further processing so that this digital signal processor (DSP) 11 to be provided, and for example, calculates the average exposure of this image sensor or display digit image etc.
Figure 1B is image element circuit array 100 circuit diagrams among Figure 1A.Wherein, when reset signal RES control NMOS electric crystal M2 conducting, the cross-pressure of LED P D will be charged to Vrst, and each signal sensing element all has an energy-storage travelling wave tube, when pixel is chosen signal controlling NMOS electric crystal M3 conducting, then the cross-pressure on the LED P D will convert electric current to via NMOS electric crystal M1, and be stored among the energy-storage travelling wave tube in the signal read circuit 130, that is the stored quantity of electric charge of this energy-storage travelling wave tube is the light income of corresponding pixel cell institute sensing.
Therefore, if irradiation intensity and the irradiation time of LED P D is considered as exposure intensity and time shutter, by " exposure=exposure intensity * time shutter " as can be known, adjust the exposure that time shutter or irradiation time can change this pixel cell; In other words, if will make exposure keep a definite value, then when exposure intensity is big more, then the time shutter must be reduced; When exposure intensity more hour, then must increase the time shutter, to keep fixing pixel cell exposure.
Generally can use exposure parameter values to adjust the time shutter of this image sensor, change the average exposure of image sensor; Known technology is to adjust exposure parameter values with the linear mode that gradation is successively decreased or gradation increases progressively a preset value, but, sets when too big when preset value, and causing the brightness of digital picture to present significantly change and exposure parameter easily can't the convergent situation; When preset value is set too hour, if presenting significantly, the luminosity of this image changes, for example the short time by the normal exposure amount uprush to overexposure or anticlimax when under-exposed, will cause the speed of convergence of exposure slow, cause digital picture to present bright excessively for a long time or the dark phenomenon of mistake, and influence the output quality of this digital picture.
Summary of the invention
In view of this, the present invention proposes a kind of capturing images chip, can judge whether to adjust exposure parameter according to the brightness of acquisition image, and can reach the purpose of accelerated light exposure speed of convergence.
According to above-mentioned purpose, the present invention proposes a kind of capturing images chip, comprises image sensor, has a plurality of sensing cells, according to exposure parameter values, in order to the acquisition image, to produce a plurality of corresponding exposure amounts; Calculation logic circuit is used for average a plurality of exposure, to produce average exposure; And exposure parameter renewal logical circuit, can be used to judge whether average exposure meets the condition of adjusting exposure parameter values, whether carry out the adjustment of exposure parameter with decision; When average exposure is positioned at region of normal exposure, then keep exposure parameter values constant; When average exposure is positioned at overexposure district or region of underexposure, then adjust exposure parameter values according to the extreme value of exposure parameter values.
In addition, the present invention more proposes a capturing images chip, is earlier according to the Rule of judgment of an image quality, judge the eigenwert of single image after, whether decision carries out the adjustment of exposure parameter again, to increase the acquisition speed of capturing images chip.
According to above-mentioned purpose, the present invention proposes a capturing images chip, comprises that an image sensor, a calculation logic circuit and an exposure parameter upgrade logical circuit.Wherein, image sensor is to produce a plurality of exposures according to exposure parameter values; And calculation logic circuit is according to above-mentioned a plurality of exposures, produces an average exposure; And exposure parameter upgrades logical circuit, comprises a logic of authentication circuit at least, is used to judge whether image meets an image quality condition.
When image met the image quality condition, even average exposure is positioned at region of normal exposure, overexposure district or region of underexposure, exposure parameter upgraded logical circuit and can so keep exposure parameter values constant, so that image sensor captures next image; Again, when image does not meet the image quality condition, and average exposure is just carried out the adjustment of exposure parameter when being positioned at overexposure district or region of underexposure.
In addition, above-mentioned capturing images chip all can be installed on an optical mouse, and the Flame Image Process of utilizing above-mentioned capturing images chip to be correlated with can increase the sensitivity that optical mouse is controlled.
To achieve the above object, the present invention proposes a kind of optical mouse, comprises light supply apparatus, in order to object is shone; Optical mirror slip in order to throwing the reflected image of this object, and produces projects images; Image sensor has a plurality of sensing cells, according to exposure parameter values, in order to capture this projects images, to produce a plurality of corresponding exposure amounts; Calculation logic circuit is used for average a plurality of exposure, to produce average exposure; And exposure parameter renewal logical circuit, comprise a logic of authentication circuit at least, be used to judge whether image meets an image quality condition.
Wherein, exposure parameter upgrades logical circuit can judge earlier that average exposure is positioned at after region of normal exposure, overexposure district or the region of underexposure, judges whether the image of acquisition meets the image quality condition again, whether adjusts exposure parameter values with decision; Or, can judge earlier whether the image of acquisition meets the image quality condition, judge that average exposure is positioned at after region of normal exposure, overexposure district or the region of underexposure, whether adjust exposure parameter with decision.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
The accompanying drawing summary
Figure 1A is expressed as typical C MOS image sensor circuit diagram.
Figure 1B is expressed as image element circuit array 100 circuit diagrams among Figure 1A.
Fig. 2 is expressed as the calcspar according to capturing images chip of the present invention.
Fig. 3 is expressed as according to exposure parameter of the present invention and adjusts synoptic diagram.
Fig. 4 is expressed as the sequential chart that image sensor reads an image.
Fig. 5 is expressed as time shutter and the adjustment synoptic diagram of time shutter not.
Fig. 6 is expressed as the synoptic diagram according to optical mouse of the present invention.
Fig. 7 is the process flow diagram of expression according to image pickup method of the present invention.
The reference numeral explanation
10～cmos image sensor chip; 11～digital signal processor; 100～image element circuit array; 130～signal read circuit; 150～programmable gain amplifier; 170～digital/analog converter; PIX11-PIXnm～image element circuit array; Vrst～exposure current potential; D1-D2～hurdle signal wire; RES～reset signal; PD～light emitting diode; M1-M3～MNOS electric crystal; RSEL1-RSEL2～the read control signal of row; The publish picture control signal of picture of Vsync～reception image sensor number; Rsel_clk～read output signal clock; Pix_clk～image element circuit control signal; Np～as several numbers; N1～columns value; Several row times that Nlfp～acquisition one image is required; Nppl～read one to be listed as required several picture point times; Tp～read the required time of a pixel; T
NlpfThe time of～acquisition one image; T
Nppl～read the time of row; The time shutter of Tunexp～not; Texp～time shutter; The reset control signal of RES_1-RES_n～n row; The pixel output signal of Vline_1-Vline_n～n row; 10～maximum exposure district; 11～overexposure district; 20～high exposure region; 30～region of normal exposure; 40～low exposure region; 50～minimum exposure district; 51～region of underexposure; 400～capturing images chip; 410～image sensor; 411～image sensing unit; 420～calculation logic circuit; 430～exposure parameter upgrades logical circuit; 431～logic of authentication circuit.
Embodiment
The present invention proposes a kind of capturing images chip, can judge whether to adjust exposure parameter according to the brightness of acquisition image, and can reach the purpose of accelerated light exposure speed of convergence; In addition, more can cooperate the Rule of judgment of an image quality, judge the eigenwert of single image, whether decision carries out the adjustment of exposure parameter again, to increase the acquisition speed of capturing images chip.
Fig. 2 is expressed as the calcspar according to capturing images chip of the present invention.Capturing images chip 400 comprises that image sensor 410, calculation logic circuit 420 and exposure parameter upgrade logical circuit 430, and wherein, image sensor 410 is made up of a plurality of image sensing unit 411.When capturing images chip 400 acquisitions one image, then a plurality of image sensing unit 411 can produce corresponding a plurality of exposure according to exposure parameter, but produce an exposure representative amount via a plurality of exposures of calculation logic circuit 420 arithmetic averages.For example, calculation logic circuit 420 can average a plurality of exposure and is produced an average exposure.According to this average exposure, then can make exposure parameter upgrade the comparison of the conditions of exposure that logical circuit 430 is correlated with, whether adjust exposure parameter in order to decision, change the time shutter of image sensor 410, do not converge to region of normal exposure so that meet the average exposure of conditions of exposure.
Fig. 7 is the process flow diagram of expression according to image pickup method of the present invention.At first, set arbitrary exposure parameter values (S102).Exposure parameter values is set time shutter of image sensor, in order to carry out single exposure (S104).Via signal sensing element 130 with the exposure on this LED P D after cross-pressure read with current forms, and storage is corresponding to the quantity of electric charge of picture element signal, can calculate the average exposure (S106) of this image sensor according to a plurality of the energy-storage travelling wave tube quantities of electric charge, and judge whether this average exposure is positioned at region of normal exposure (S108), judge whether this average exposure is positioned at overexposure district or region of underexposure (S110), judge this average exposure whether between normal light district and overexposure district (S114) and judge that this average exposure is whether between normal light district and region of underexposure (S118).
If this average exposure is positioned at a region of normal exposure, then directly with this exposure parameter as exposure parameter (S104) next time; If this average exposure is positioned at an overexposure district or a region of underexposure, then adjust this exposure parameter values (S112) with this exposure parameter values and a parameter extreme value.For example, if this average exposure is positioned at the overexposure district, then can with this exposure parameter values and minimum exposure parameter value mutually adduction average, with as next time exposure parameter values; If this average exposure is positioned at region of underexposure, then can with this exposure parameter values and maximum exposure parameter value mutually adduction average, with as next time exposure parameter values.
If this average exposure between this region of normal exposure and overexposure district, then deducts this exposure parameter one preset value and adjusts this exposure parameter values (S116); If this average exposure between this region of normal exposure and region of underexposure, then adds this exposure parameter values one preset value and adjusts exposure parameter values (S120).
In addition; if this average exposure is not all at above-mentioned exposure range (S122); then expression extraneous luminosity this moment has exceeded the scope that this image sensor can expose; for example; when image is too bright or too dark; usually can assist the adjustment exposure parameter to adjust aperture or to install mode such as flashlamp additional, just repeat no more at this.
Fig. 3 adjusts synoptic diagram according to exposure parameter of the present invention, the right scale is exposure parameter scope Range_E, left side scale then is average exposure range Range_AE, wherein, average exposure range Range_AE divides into maximum exposure district 10, overexposure district 11, high exposure region 20, region of normal exposure 30, low exposure region 40, region of underexposure 51 and minimum exposure district 50.Exposure parameter High value is between the Max_1 value; Exposure parameter scope Range_E then sets a maximal value High, a minimum value Low and a parameter value M, so that the adjustment reference value of image sensor exposure parameter to be provided.
But according to image sensor accelerated light exposure speed of convergence of the present invention; For example, if with the scope definition of exposure parameter values is between 0～255, the extreme value Min and the Max that set exposure parameter values are respectively 20 and 235, and the M value is set at 10, and the initial exposure parameter values of image sensor is set at 230, after carrying out single exposure, if its average exposure is when being positioned at overexposure district 11, then must adjust exposure parameter values, in order to average exposure is next time converged to region of normal exposure 30, when exposure parameter values is 90-120, can make average exposure converge to region of normal exposure 30 in this hypothesis; If according to automatic explosion method of the present invention, with this exposure parameter values 230 and exposure parameter extreme value 20 mutually adduction average, can calculate another exposure parameter values is 125, as if the exposure of carrying out next time with exposure parameter values 125, then average exposure can restrain paramount exposure region 20, at this moment, as long as again this exposure parameter values 125 is deducted a M value 10, exposure parameter values can be adjusted between the 90-120; Therefore, according to automatic explosion method of the present invention, the adjustment that 230 needs of exposure parameter values are twice just can converge to region of normal exposure 30 with average exposure.
If according to known technology, setting a parameter L value is 20, and exposure parameter values 230 is reduced by a L value successively, then exposure parameter values needs 6 adjustment just can make average exposure converge to region of normal exposure 30 at least; Hence one can see that, and compared to known technology, exposure speed of convergence of the present invention is comparatively quick.
Fig. 4 reads the sequential chart of an image for image sensor, wherein, Tp is a picture point time, and expression is read the required time of a pixel, and Nppl is the picture point time number, the required several picture point times of row are read in expression, Nlpf is a row time number, and expression is read required several row times of this image, and Vsync is for receiving the synchronizing signal of image sensor output pixel signal, Rsel_clk is the control signal that reads of image sensor, and Pix_clk is the control signal of pixel array circuit read pixel data.Therefore, read a row time T
NpplBe Nlpf*Tp, and this image sensor captures the required time T of an image
NlpfBe Tp*Nppl*Nlpf; For example, suppose the Tp=1 μ s of this image sensor, Nppl=40, Nlpf=20, the then required time T of this image sensor acquisition image
Nlpf(frame time) is 800 μ s, but that is the longest time shutter of this image sensor be 800 μ s, therefore, capturing images rate (frame rate) is 1250frame/sec.
In other words, if fixedly Tp and Npp and adjust the Nlpf value, but can change the longest time shutter and the capturing images rate of image sensor, for example, Nlpf can be risen at 40 o'clock, then the image sensor acquisition required time of image will increase to 1600 μ s, and relatively the longest time shutter can increase to 1600 μ s, the capturing images rate is then reduced to 625frame/sec, but can reach the longest time shutter of adjustment image sensor and the purpose of capturing images rate.
By the explanation of Figure 1B as can be known, when image sensor captures an image, can utilize reset signal RES to control NMOS M2 conducting, in order to the irradiation zero-time of control LED P D, and the exposure of control image sensor.
In order to adjust the zero-time of reset signal RES, the present invention also proposes two parameters, several count a Np and a columns value Nl to be respectively a picture, utilize two above-mentioned parameter values to can be used to adjust the zero-time of reset signal RES, the zero-time of this reset signal RES, also can be considered the not time shutter Tunexp of image sensor, be shown below:
Tunexp＝Tp*(Np+Nppl*Nl)
＝Tp*Np+T
Nppl*Nl
Therefore, by above-listed formula as can be known, count Np and columns value Nl, can be used to determine the not time shutter Tunexp of image sensor as several.
For example, as Tp=1 μ s, Nppl=40, Nlpf=20, but the promptly the longest time shutter of meaning is 800 μ s, and, suppose that not the time shutter is equivalent to read 3 and is listed in and adds 10 times that pixel is required, then Nl is set at 3, and Np is set at 10, the not time shutter that can be calculated image sensor by above-listed formula is 130 μ s, anticipates promptly, and the not time shutter of image sensor is 130 μ s.
And but time shutter Texp deducts the not time shutter for the longest time shutter, is shown below:
Texp＝T
Nlpf-Tunexp
Therefore, can to try to achieve be 670 μ s the time shutter.If image sensor is because of the increase of ambient brightness, and must adjust exposure parameter values when reducing average exposure, then can adjust the suitable time shutter by changing Np and Nl parameter value; For example, only increasing the Np value is 30, can increase not that the time shutter is 150 μ s, and the time shutter then can be reduced to 650 μ s.
Fig. 5 is the time shutter and the adjustment synoptic diagram of time shutter not, wherein RES_1-RES_n is the reset control signal of n row, Vline_1-Vline-n is the pixel output signal of n row, Tunexp is time shutter not, its value can be tried to achieve by Tp* (Np+Nppl*Nl), and Texp is the time shutter, and its value can be tried to achieve by Tp*Nppl*Nlpf-Tp* (Np+Nppl*Nl); Generally speaking, unless necessary otherwise can not change the parameter value of Nlpf, to avoid influencing the capturing images rate.
Therefore, capture the required time T of an image at the still image sensor
NlpfSituation under, adjust the zero-time that time shutter Tunexp not promptly can be used to control reset signal RES, to reach the purpose of indirect adjustment image sensor time shutter.
In addition, use the optical mouse of capturing images chip of the present invention,, can carry out subsequent image processing as long as the feature that image sensor can recognisable image does not need each acquisition image is adjusted exposure.
Therefore, capturing images chip of the present invention can judge earlier that average exposure is positioned at after region of normal exposure, overexposure district or the region of underexposure, judges whether the image of acquisition meets the image quality condition again, whether adjusts exposure parameter values with decision; Perhaps, can judge earlier whether the image of acquisition meets the image quality condition, judge that average exposure is positioned at after region of normal exposure, overexposure district or the region of underexposure, whether adjust exposure parameter with decision.
To achieve the above object, as shown in Figure 2, exposure parameter upgrades logical circuit 430 and more comprises a logic of authentication circuit 431, is used for judging whether the image of acquisition meets the image quality condition.
Above-mentioned image quality condition can utilize the feature of the image of one dimension to judge.For example, judge the function waveform that to draw the one dimension image, calculate the crest of above-mentioned function waveform and the number of trough and can be used to promptly judge whether the characteristics of image of acquisition meets the image quality condition according to the brightness of two picture elements.In addition, also can utilize the Flame Image Process mode of two dimension to judge image quality.For example, judge according to the brightness of two dimensional image two picture elements and also can draw the two dimensional image waveform that therefore, the feature according to the crestal line and the mound line of two dimensional image can contrast a form and judge whether the image of acquisition meets the image quality condition.
Image quality determination methods of the present invention is not limited to present embodiment, also can utilize various image processing methods, comes the image of acquisition is judged whether to meet the image quality condition.
Therefore, when being positioned at region of normal exposure, because foundation exposure at this moment can be known the feature of resolution acquisition image, so do not need to carry out the adjustment of exposure parameter values as if average exposure.If average exposure is positioned at overexposure district or region of underexposure, and when not meeting the image quality condition, represent that promptly exposure parameter upgrades the feature that logical circuit 430 can't recognisable image, so need carry out the adjustment of exposure parameter; When if average exposure is positioned at overexposure district or region of underexposure, and the image of acquisition is when meeting the image quality condition, but represents that promptly exposure parameter upgrades the feature of logical circuit 430 recognisable image, so do not carry out the adjustment of exposure parameter.
Fig. 6 is expressed as the synoptic diagram according to optical mouse of the present invention.Optical mouse 500 comprises light supply apparatus 510, optical mirror slip 520 and foundation capturing images chip 530 of the present invention, and wherein, light supply apparatus 510 is to adopt LED.
When LED shone an object, the light of its reflection will be transmitted to capturing images chip 530 via optical mirror slip 520, with the Flame Image Process action of being correlated with.
Action situation about capturing images chip 530 has described in detail as above, just repeats no more at this.
The present invention has disclosed preferred embodiment as above; only be used for helping to understand enforcement of the present invention; non-in order to limit spirit of the present invention; and be familiar with this field skill person after comprehension spirit of the present invention; in not breaking away from spiritual scope of the present invention; when the variation that can do a little change retouching and be equal to is replaced, its scope of patent protection when on accompanying Claim and etc. same domain decide.
Claims (15)
1. capturing images chip comprises:
One image sensor has a plurality of sensing cells, according to an exposure parameter values, in order to capture an image, to produce a plurality of corresponding exposure amounts;
One calculation logic circuit is used for these exposures of computing, to produce an exposure representative amount; And
One exposure parameter upgrades logical circuit,
If this exposure representative amount is positioned at one first exposure region, in order to keep this exposure parameter values constant, so that this image sensor captures next image;
If this exposure representative amount is positioned at one second exposure region, then adjust this exposure parameter values, so that this image sensor captures this next image according to this exposure parameter values and one first exposure parameter extreme value; And
If this exposure representative amount is positioned at one the 3rd exposure region, then adjust this exposure parameter values, so that this image sensor captures this next image according to this exposure parameter values and one second exposure parameter extreme value;
Wherein, this first exposure region is between this second exposure region and the 3rd exposure region, and this first exposure parameter extreme value and this second exposure parameter extreme value are to be maximal value and minimum value in the variation range of this exposure parameter values.
2. capturing images chip as claimed in claim 1, this exposure parameter upgrade logical circuit and more comprise a logic of authentication circuit, correspond to this image in order to judgement and whether meet an image quality condition; And when this image met this image quality condition, this exposure parameter upgraded logical circuit and keeps this exposure parameter values constant, so that this image sensor captures next image.
3. capturing images chip as claimed in claim 1, wherein,
One the 4th exposure region when this exposure representative amount is positioned at the 4th exposure region, is then adjusted this exposure parameter values with a preset value between this first exposure region and this second exposure region.
4. capturing images chip as claimed in claim 1, wherein,
Comprise one the 5th exposure region between this first exposure region and the 3rd exposure region, when this exposure representative amount is positioned at the 5th exposure region, then adjust this exposure parameter values with a preset value.
5. capturing images chip as claimed in claim 1, wherein, this exposure parameter values is formed as several numerical value, a columns value and a columns time numerical value by one.
6. capturing images chip comprises:
One image sensor has a plurality of sensing cells, according to an exposure parameter values, in order to capture an image, to produce a plurality of corresponding exposure amounts;
One calculation logic circuit is used for these exposures of computing, to produce an exposure representative amount; And
One exposure parameter upgrades logical circuit, comprises a logic of authentication circuit at least, is used to judge whether this image meets an image quality condition; When this image meets this image quality condition, then do not adjust this exposure parameter values; And, when this image does not meet this image quality condition, then adjust this exposure parameter values.
7. the capturing images chip shown in claim 6, wherein,
When this image meets this image quality condition, and, when this exposure representative amount was positioned at one first exposure region, one second exposure region or one the 3rd exposure region, this exposure parameter upgraded logical circuit and keeps this exposure parameter values constant, so that this image sensor captures next image; And
When this image does not meet this image quality condition, and,
This exposure representative amount is positioned at this second exposure region, then adjusts this exposure parameter values according to this exposure parameter values and one first exposure parameter extreme value, so that this image sensor captures this next image; And
This exposure representative amount is positioned at the 3rd exposure region, then adjusts this exposure parameter values according to this exposure parameter values and one second exposure parameter extreme value, so that this image sensor captures this next image;
Wherein, this first exposure region is between this second exposure region and the 3rd exposure region, and this first exposure parameter extreme value and this second exposure parameter extreme value are to be maximal value and minimum value in the variation range of this exposure parameter values.
8. capturing images chip as claimed in claim 7, wherein,
One the 4th exposure region when this exposure representative amount is positioned at the 4th exposure region, is then adjusted this exposure parameter values with a preset value between this first exposure region and this second exposure region.
9. capturing images chip as claimed in claim 7, wherein,
Comprise one the 5th exposure region between this first exposure region and the 3rd exposure region, when this exposure representative amount is positioned at the 5th exposure region, then adjust this exposure parameter values with a preset value.
10. capturing images chip as claimed in claim 6, wherein this exposure parameter values is formed as several numerical value, a columns value and a columns time numerical value by one.
11. an optical mouse comprises:
One light supply apparatus is in order to shine an object;
One optical mirror slip in order to throwing a reflected image of this object, and produces a projects images;
One image sensor has a plurality of sensing cells, according to an exposure parameter values, in order to capture this projects images, to produce a plurality of corresponding exposure amounts;
One calculation logic circuit is used for these exposures of computing, to produce an exposure representative amount; And
One exposure parameter upgrades logical circuit,
If this exposure representative amount is positioned at one first exposure region, in order to keep this exposure parameter values constant, so that this image sensor captures next projects images;
If this exposure representative amount is positioned at one second exposure region, then adjust this exposure parameter values, so that this image sensor captures this next projects images according to this exposure parameter values and one first exposure parameter extreme value; And
If this exposure representative amount is positioned at one the 3rd exposure region, then adjust this exposure parameter values, so that this image sensor captures this next projects images according to this exposure parameter values and one second exposure parameter extreme value;
Wherein, this first exposure region is between this second exposure region and the 3rd exposure region, and this first exposure parameter extreme value and this second exposure parameter extreme value are to be maximal value and minimum value in the variation range of this exposure parameter values.
12. optical mouse as claimed in claim 11, this exposure parameter upgrades logical circuit and more comprises a logic of authentication circuit, whether this image that corresponds to this image in order to judgement meets an image quality condition, when this image meets this image quality condition, this exposure parameter upgrades logical circuit and keeps this exposure parameter values constant, so that this image sensor captures next image.
13. optical mouse as claimed in claim 11, wherein,
Comprise one the 4th exposure region between this first exposure region and this second exposure region, when this exposure representative amount is positioned at the 4th exposure region, then adjust this exposure parameter values with a preset value.
14. optical mouse as claimed in claim 11, wherein,
Comprise one the 5th exposure region between this first exposure region and this second exposure region, when this exposure representative amount is positioned at the 5th exposure region, then adjust this exposure parameter values with a preset value.
15. optical mouse as claimed in claim 11, wherein this exposure parameter values is formed as several numerical value, a columns value and a columns time numerical value by one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410033332 CN1677431A (en) | 2004-04-02 | 2004-04-02 | Optical mouse and image fetching chip thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410033332 CN1677431A (en) | 2004-04-02 | 2004-04-02 | Optical mouse and image fetching chip thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1677431A true CN1677431A (en) | 2005-10-05 |
Family
ID=35049931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410033332 Pending CN1677431A (en) | 2004-04-02 | 2004-04-02 | Optical mouse and image fetching chip thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1677431A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298452A (en) * | 2010-06-22 | 2011-12-28 | 原相科技股份有限公司 | Method for adjusting an exposure condition of an optical sensor module and an optical sensor module thereof |
| CN101566889B (en) * | 2009-05-22 | 2012-03-28 | 埃派克森微电子(上海)股份有限公司 | Method for regulating image quality control parameter of optical indicator |
| CN103841334A (en) * | 2012-11-27 | 2014-06-04 | 原相科技股份有限公司 | Exposure adjusting device, image homogenizing device and image homogenizing method |
| TWI499941B (en) * | 2013-01-30 | 2015-09-11 | Pixart Imaging Inc | Optical mouse apparatus and method used in optical mouse apparatus |
| CN111522455A (en) * | 2016-02-04 | 2020-08-11 | 原相科技股份有限公司 | Image sensor including self-energy conversion pixels |
| US11740684B2 (en) | 2016-01-27 | 2023-08-29 | Pixart Imaging Inc. | Sensor device with sensing array having sensing pixels and self-powered pixels |
-
2004
- 2004-04-02 CN CN 200410033332 patent/CN1677431A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101566889B (en) * | 2009-05-22 | 2012-03-28 | 埃派克森微电子(上海)股份有限公司 | Method for regulating image quality control parameter of optical indicator |
| CN102298452A (en) * | 2010-06-22 | 2011-12-28 | 原相科技股份有限公司 | Method for adjusting an exposure condition of an optical sensor module and an optical sensor module thereof |
| CN103841334A (en) * | 2012-11-27 | 2014-06-04 | 原相科技股份有限公司 | Exposure adjusting device, image homogenizing device and image homogenizing method |
| TWI499941B (en) * | 2013-01-30 | 2015-09-11 | Pixart Imaging Inc | Optical mouse apparatus and method used in optical mouse apparatus |
| US11740684B2 (en) | 2016-01-27 | 2023-08-29 | Pixart Imaging Inc. | Sensor device with sensing array having sensing pixels and self-powered pixels |
| CN111522455A (en) * | 2016-02-04 | 2020-08-11 | 原相科技股份有限公司 | Image sensor including self-energy conversion pixels |
| CN111522455B (en) * | 2016-02-04 | 2023-06-09 | 原相科技股份有限公司 | Image sensor comprising self-energy conversion pixels |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4960605B2 (en) | Automatic exposure compensation method and compensation device | |
| US7936336B2 (en) | Optical mouse and image capture chip thereof | |
| CN1165158C (en) | Camera equipment and taking picture method | |
| CN106254787B (en) | Filming apparatus and image pickup method | |
| CN1993982A (en) | Imaging device, imaging method, and imaging control program | |
| CN105611185B (en) | image generating method, device and terminal device | |
| CN1226866C (en) | Solid-state image sensor | |
| US20070171298A1 (en) | Image capturing element, image capturing apparatus, image capturing method, image capturing system, and image processing apparatus | |
| CN1806432A (en) | Imaging apparatus | |
| CN105578067B (en) | image generating method, device and terminal device | |
| CN1340962A (en) | Multiple sampling in broad dynamic range realized by time-indexing method | |
| CN103905731B (en) | A kind of wide dynamic images acquisition method and system | |
| CN101049012A (en) | Image pickup apparatus, exposure control method, and computer program installed in the image pickup apparatus | |
| KR20090067230A (en) | Camera control method for vehicle number plate recognition | |
| CN101068311A (en) | Image capture apparatus and image capture program | |
| KR20030097687A (en) | Image processing apparatus, camera apparatus, and automatic exposure control method | |
| CN101035205A (en) | Digital imaging apparatus with camera shake compensation and adaptive sensitivity switching function | |
| CN101227562A (en) | Luminance correcting method | |
| CN1495659A (en) | Camera | |
| WO2012093519A1 (en) | Imaging device and light emission amount control method | |
| JP2011039449A (en) | Imaging apparatus and control method thereof | |
| CN101472077B (en) | Digital photographic apparatus with luminance compensation and compensation process thereof | |
| CN1847905A (en) | Focus detection apparatus and signal processing method for focus detection | |
| CN101998059A (en) | Photographing apparatus and method | |
| CN1677431A (en) | Optical mouse and image fetching chip thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |