CN104618641A - Photosensitive adjusting method and electronic device - Google Patents
Photosensitive adjusting method and electronic device Download PDFInfo
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- CN104618641A CN104618641A CN201510026406.1A CN201510026406A CN104618641A CN 104618641 A CN104618641 A CN 104618641A CN 201510026406 A CN201510026406 A CN 201510026406A CN 104618641 A CN104618641 A CN 104618641A
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Abstract
The invention discloses a photosensitive adjusting method in one embodiment. The method comprises the steps of acquiring the attribute information of each pixel point, selecting a control signal corresponding to the attribute information of each pixel point according to a predetermined rule, and shooting each pixel point by use of the control signal corresponding to each pixel point after receiving a shooting command. Meanwhile, the invention also discloses an electronic device. The intensity difference of the shot pictures can be obviously reduced to achieve the optimal display effect of the pictures, and thereof, the experience of a user can be enhanced.
Description
Technical field
The present invention relates to sensitive technologies, be specifically related to a kind of photosensitive control method and electronic equipment.
Background technology
The photograph application of the electronic equipment such as camera, mobile phone, facilitates the record of user's realization to Life intravenous drip.In the electronic device, charge-coupled device CCD imaging and complementary metal oxide semiconductors (CMOS) cmos imaging are the imaging techniques comparatively commonly used, and realize presenting of image by multiple pixel cells of inside.In the imaging circuit of CCD or CMOS, between pixel cell, all use same control signal, make the picture taking out have obvious shading value difference, the shooting demand of user cannot be met.
Summary of the invention
For solving the technical problem of existing existence, the embodiment of the present invention is to provide a kind of photosensitive control method and electronic equipment, obviously can slow down the shading value difference of captured picture, make picture obtain optimal display result, promotes Consumer's Experience.
The technical scheme of the embodiment of the present invention is achieved in that
Embodiments provide a kind of photosensitive control method, be applied in electronic equipment, described method comprises:
Gather the attribute information of each pixel;
The control signal that the attribute information of described each pixel is corresponding is selected according to pre-defined rule;
After receiving shooting order, control signal corresponding to described each pixel is adopted to take described each pixel.
In such scheme, the attribute information of each pixel of described collection, comprising:
Gather the first input signal of described pixel;
Gather the first output signal of described pixel;
Accordingly, the described control signal corresponding according to the attribute information of the described each pixel of pre-defined rule selection, comprising:
When the numerical value of described first output signal exceeds the first predetermined threshold, described first input signal and first are outputed signal and does the first computing, obtain the first control signal;
The first output signal of described pixel is changed according to described first control signal.
In such scheme, described method also comprises:
When the numerical value of described first output signal is lower than the second predetermined threshold, described first input signal and first is outputed signal and does the second computing, obtain the second control signal;
The first output signal of described pixel is changed according to described second control signal;
Wherein, described first predetermined threshold is more than or equal to the second predetermined threshold.
In such scheme, before the first input signal gathering described pixel, described method also comprises:
When the quantity of the input signal of described pixel is two,
According to the first pre-defined rule, choose an input signal in two input signals as described first input signal.
In such scheme, described foundation first pre-defined rule, choose an input signal in two input signals as described first input signal, comprising:
Receive the first control data of described pixel;
According to the attribute of described first control data, the corresponding input signal at least two input signals described in control is effective;
Determine that described effective input signal is described first input signal.
The embodiment of the present invention additionally provides a kind of electronic equipment, and described electronic equipment comprises:
First collecting unit, for gathering the attribute information of each pixel;
First selected cell, for selecting according to pre-defined rule the control signal that the attribute information of described each pixel is corresponding;
First shooting unit, after receiving shooting order, adopts control signal corresponding to described each pixel to take described each pixel.
In such scheme,
Described first collecting unit, for gathering the first input signal of described pixel; Gather the first output signal of described pixel;
Described first selected cell, for when the numerical value of described first output signal exceeds the first predetermined threshold, outputs signal described first input signal and first and does the first computing, obtain the first control signal;
The first output signal of described pixel is changed according to described first control signal.
In such scheme,
Described first selected cell, for when the numerical value of described first output signal is lower than the second predetermined threshold, outputs signal described first input signal and first and does the second computing, obtain the second control signal;
The first output signal of described pixel is changed according to described second control signal;
Wherein, described first predetermined threshold is more than or equal to the second predetermined threshold.
In such scheme, described electronic equipment also comprises: the second selected cell, also for:
When the quantity of the input signal of described pixel is two,
According to the first pre-defined rule, choose an input signal in two input signals as described first input signal.
In such scheme, described second selected cell, also for:
Receive the first control data of described pixel;
According to the attribute of described first control data, the corresponding input signal at least two input signals described in control is effective;
Determine that described effective input signal is described first input signal.
The photosensitive control method that the embodiment of the present invention provides and electronic equipment, described method comprises: the attribute information gathering each pixel; The control signal that the attribute information of described each pixel is corresponding is selected according to pre-defined rule; After receiving shooting order, control signal corresponding to described each pixel is adopted to take described each pixel.In the present embodiment, each pixel adopts corresponding control signal, and all uses compared with same control signal between pixel cell multiple in prior art, obviously can slow down the shading value difference of captured picture, make picture obtain optimal display result, promote Consumer's Experience.
Accompanying drawing explanation
Fig. 1 is the realization flow schematic diagram of the first embodiment of photosensitive control method provided by the invention;
A particular flow sheet of the control signal that the attribute information of each pixel is corresponding is selected in the realization that Fig. 2 provides for the embodiment of the present invention according to pre-defined rule;
Another particular flow sheet of the control signal that the attribute information of each pixel is corresponding is selected in the realization that Fig. 3 provides for the embodiment of the present invention according to pre-defined rule;
The photosensitive regulating circuit schematic diagram that Fig. 4 provides for the embodiment of the present invention;
Another photosensitive regulating circuit schematic diagram that Fig. 5 provides for the embodiment of the present invention;
Fig. 6 is the composition structural representation of the first embodiment of electronic equipment provided by the invention;
Fig. 7 is the composition structural representation of the second embodiment of electronic equipment provided by the invention.
Embodiment
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail, should be appreciated that following illustrated preferred embodiment is only for instruction and explanation of the present invention, is not intended to limit the present invention.
In the following embodiment of photosensitive control method provided by the invention and electronic equipment, involved electronic equipment includes but not limited to: all kinds such as industrial control computer, personal computer computer, integral computer, panel computer, mobile phone, electronic reader etc.The object of the preferred electronic equipment of the embodiment of the present invention is mobile phone or panel computer.
Embodiment of the method one:
First embodiment of photosensitive control method provided by the invention, is applied in an electronic equipment, and described electronic equipment is by adopting CCD imaging or the shooting of cmos imaging technology realization to scene.The imaging circuit of electronic equipment includes multiple pixel cell.
Fig. 1 is the realization flow schematic diagram of the first embodiment of photosensitive control method provided by the invention; As shown in Figure 1, described method also comprises:
Step 101: the attribute information gathering each pixel;
Here, described first attribute information can be the first input signal and first output signal of described pixel, is specifically as follows input voltage/electric current, output voltage/electric current; Such as, the input voltage V of pixel is gathered
ccwith output voltage V
out.
Step 102: select the control signal that the attribute information of described each pixel is corresponding according to pre-defined rule;
Here, according to pre-defined rule, select and the input voltage V gathered
ccwith output voltage V
outthe first corresponding control signal or the second control signal; Under the first control signal, the output voltage V of described pixel
outdiminish; Under the second control signal, the output voltage V of described pixel
outbecome large.
Step 103: after receiving shooting order, adopt control signal corresponding to described each pixel to take described each pixel.
Here, after described electronic equipment receives shooting instruction, during as received the operation of user to shooting push button, described electronic equipment utilizes described control signal take current scene and present photographic images; Because different pixels adopts corresponding control signal, thus captured by the color of image that goes out comparatively even, the obvious phenomenon of shading value difference can not be had.
As can be seen here, in the embodiment of the present invention, each pixel is according to respective attribute information, obtain corresponding control signal, namely different pixels adopts corresponding control signal, all adopts compared with same control signal, obviously can slow down the shading value difference of captured picture with prior art to multiple or all pixel cells, make picture obtain optimal display result, promote Consumer's Experience.
Embodiment of the method two:
The present embodiment, based on previous embodiment one, selects the method for control signal corresponding to the attribute information of each pixel to be described further described according to pre-defined rule.As shown in Figure 2, described method comprises:
Step 201: when the numerical value of described first output signal exceeds the first predetermined threshold, described first input signal and first are outputed signal and does the first computing, obtain the first control signal;
Here, for gathered attribute information for output voltage and input voltage, judge whether the numerical value of the output voltage gathered exceeds the first predetermined threshold as 0.6V, when being judged as exceeding, gathered input voltage and output voltage are made additive operation, obtains the first control signal.
Step 202: the first output signal changing described pixel according to described first control signal.
Here, the input voltage due to certain pixel cell is generally fixing, so a fixed voltage value deducts one higher than after the voltage of predetermined threshold, obtains the first control signal; Under this first control signal, the output voltage of this pixel cell will reduce.
Or the described control signal corresponding according to the attribute information of the described each pixel of pre-defined rule selection, as shown in Figure 3, also comprises:
Step 301: when the numerical value of described first output signal is lower than the second predetermined threshold, described first input signal and first is outputed signal and does the second computing, obtain the second control signal;
Here, for gathered attribute information for output voltage and input voltage, judge the numerical value of output voltage that gathers whether lower than the second predetermined threshold as 0.4V, be judged as lower than time, gathered input voltage and output voltage are made additive operation, obtains the second control signal.
Step 302: the first output signal changing described pixel according to described second control signal; Described first predetermined threshold is more than or equal to the second predetermined threshold.
Here, the input voltage due to certain pixel cell is generally fixing, so a fixed voltage value deducts one lower than after the voltage of predetermined threshold, obtains the second control signal; Under this second control signal, the output voltage of this pixel cell will increase.
The photosensitive regulating circuit schematic diagram that Fig. 4 provides for the embodiment of the present invention; Circuit shown in Fig. 4 can be considered the photosensitive regulating circuit schematic diagram for each pixel; Below in conjunction with Fig. 4, embodiments of the present invention is further illustrated.
The second circuit that circuit shown in Fig. 4 comprises the first circuit and is connected with the first circuit.Wherein, second circuit is feedback circuit, specifically negative-feedback circuit, this negative-feedback circuit, and the gate pole of M2 is no longer by the control of unified control signal, but be connected with the drain electrode of metal-oxide-semiconductor, corresponding control signal can be obtained according to input signal Vcc from output signal the different of Vout.
Further, the first circuit comprises: photodiode, electric charge overflow door pipe M3, charge sensitive diffusion capacitance C1, reset transistor M4 and source follower M1; Wherein, positive pole and the electric charge of photodiode overflow door pipe M3 and are connected, and the other end that electric charge overflows door pipe M3 is connected with the grid of charge sensitive diffusion capacitance C1, reset transistor M4, source follower M1; The other end of reset transistor M4 is connected with input voltage Vcc; The source electrode of source follower M1 is connected with input voltage Vcc.Described second circuit comprises: differential amplifier DA, metal-oxide semiconductor (MOS) metal-oxide-semiconductor and row gating switch pipe M2; Wherein, two inputs of differential amplifier DA are respectively the output voltage V of pixel cell
outwith input voltage V
cC, the output of differential amplifier DA is connected with the gate pole of metal-oxide-semiconductor, and the source electrode of metal-oxide-semiconductor is connected with Vcc, and the drain electrode of metal-oxide-semiconductor is connected with row gating switch pipe M2; One end of row gating switch pipe M2 is connected with one end of source follower M1; Choose signal on a position of metal-oxide-semiconductor source side as RS signal.
The course of work of this circuit is: first open source follower M1, reset transistor M4 resets to photodiode, enters reset mode to make circuit; Then M1 is closed, enter sampling state, light exposes on photodiode and produces photogenerated charge, photogenerated charge overflows door pipe M3 through electric charge and flows through to source follower M1, source follower M1 amplifies output after being cushioned by photogenerated charge, wherein, electric charge overflows door pipe M3 can detect whole photogenerated charges that the positive pole diffusion region of whole photodiode produces, and charge sensitive diffusion capacitance C1 is for collecting the photogenerated charge of spilling; Finally open row gating switch pipe M2, entering signal reads state, and the signal of telecommunication is exported on column bus by M2.
In above process, the output voltage V of current time pixel cell is gathered
outand input voltage V
cC, judge the output voltage V gathered
outsize whether exceed the first predetermined threshold as 0.6V, when being judged as exceeding 0.6V, by gathered output voltage V
outas the negative input end of differential amplifier DA, by gathered input voltage V
cCthe positive input terminal of differential amplifier DA, by input voltage V
cCadditive operation is made with output voltage Vout, and export the gate pole that first controls signal to metal-oxide-semiconductor, this first control signal makes the gate pole of metal-oxide-semiconductor reduce, the drain voltage of metal-oxide-semiconductor reduces thereupon, under the gate voltage of the row gating switch pipe M2 be connected with the drain electrode of metal-oxide-semiconductor is at two the control reducing of-state voltage, it is also in reduction state, makes to be expert at gating switch pipe M2 when subsequent time is opened, the voltage V of output
outfor the voltage reduced.Or, at collection output voltage V
outand input voltage V
cCafter, judge the output voltage V gathered
outsize whether lower than the second predetermined threshold as 0.4V, when being judged as lower than 0.4V, by gathered output voltage V
outas the negative input end of differential amplifier DA, by gathered input voltage V
cCthe positive input terminal of differential amplifier DA, by input voltage V
cCwith output voltage V
outmake additive operation, and export the gate pole that second controls signal to metal-oxide-semiconductor, this first control signal makes the gate pole of metal-oxide-semiconductor increase, the drain voltage of metal-oxide-semiconductor increases thereupon, under the gate voltage of the row gating switch pipe M2 be connected with the drain electrode of metal-oxide-semiconductor is in the control of enlarging state voltage at two, it is also in enlarging state, makes to be expert at gating switch pipe M2 when subsequent time is opened, the voltage V of output
outfor the voltage increased.Wherein, the input voltage V of pixel cell is considered
cCwithin a period of time, be a fixed value, thus by an output voltage signal higher than certain threshold value and a fixed value poor, just can reach the object regulating this output voltage signal to less direction; By an output voltage signal lower than certain threshold value and a fixed value poor, just can reach the object to regulating this output voltage signal compared with general orientation.Wherein, described first predetermined threshold, the second predetermined threshold can set flexibly according to practical situations.
Generally, in the second circuit shown in Fig. 4, by gathered output voltage V
outas the negative input end of differential amplifier DA, by input voltage V
cCas positive input terminal, work as V
outwhen value is larger, by the voltage-regulation of differential amplifier, metal-oxide-semiconductor, make the V that value is larger
outto reduction future development; Work as V
outwhen value is less, by the voltage-regulation of differential amplifier, metal-oxide-semiconductor, make the V that value is less
outdevelop to augment direction.Negative input end due to differential amplifier DA is gathered output voltage V
out, so claim second circuit to be feedback circuit, specifically negative-feedback circuit, voltage V can be allowed
outoutput valve be maintained within a certain range, avoid the appearance of extramalization output voltage.Simultaneously, adopt compared with same control signal RS with the gate pole of the M2 of the prior art i.e. multiple pixel cell that is directly connected with RS signal, no longer directly be connected with RS signal with the gate pole of the M2 in the present embodiment, but be controlled by the gate pole of metal-oxide-semiconductor and the voltage of these two positions of source electrode and each pixel cell and can obtain corresponding control signal according to the size of gathered signal, the notable difference of the picture shading value shot can be slowed down, make the color of picture be tending towards even.
In the present invention's preferred embodiment, when the quantity of the input signal of described pixel is two, can according to the first pre-defined rule, choose an input signal in two input signals as described first input signal.Wherein, described foundation first pre-defined rule, chooses an input signal in two input signals as described first input signal, comprising: the first control data receiving described pixel; According to the attribute of described first control data, the corresponding input signal at least two input signals described in control is effective; Determine that described effective input signal is described first input signal.
Pixel cell shown in Fig. 4 only has an input voltage V
cc, for increasing the dynamic adjustments scope of output voltage, the present embodiment can also adopt two input voltage V
cC1and V
cC2, select one of them input voltage effective at synchronization.As shown in Figure 5, two input voltage V are included
cC1and V
cC2, input voltage V
cC1be connected with the source electrode of MOS 1, input voltage V
cC2be connected with the source electrode of a reverse metal-oxide-semiconductor MOS 2; The gate pole of MOS 1 is connected with the gate pole of MOS 2, provides the first control data Control in this junction by other circuit part of electronic equipment.Receive the first control data Control, judge that the value of the first control data equals numerical value A such as A=1 and still equals numerical value B as B=0; When being judged as Control=1, MOS 1 conducting, selects V
cC1for effective input voltage; When being judged as Control=0, MOS 2 conducting, selects V
cC2for effective input voltage.Operation principle for circuit part identical with Fig. 4 in Fig. 5 refers to aforementioned explanation, repeats no more herein.Adopt the benefit of two input voltages to be, different input voltages can be distributed and correspond to different light intensities, such as: V
cC1can use under normal circumstances at light intensity; V
cC2can cross strong at light or use under crossing dark situation, so, add the dynamic adjustments scope of output voltage, make the filming apparatus of electronic equipment better can adapt to the light of varying strength.
As can be seen here, in the present embodiment, pass through feedback circuit, the adjustment of larger output voltage to less direction can be realized, or less output voltage is to the adjustment compared with general orientation, output voltage is maintained within a certain range, avoids output voltage and occur extreme value, obviously can slow down the shading value difference of the picture shot, make color more even.
Electronic equipment embodiment one:
First embodiment of electronic equipment provided by the invention, described electronic equipment is by adopting CCD imaging or the shooting of cmos imaging technology realization to scene.The imaging circuit of electronic equipment includes multiple pixel cell.
Fig. 6 is the composition structural representation of the first embodiment of electronic equipment provided by the invention; As shown in Figure 6, described electronic equipment comprises: the first collecting unit 601, first selected cell 602 and the first shooting unit 603; Wherein,
First collecting unit 601, for gathering the attribute information of each pixel;
Here, described electronic equipment, described first attribute information that specifically the first collecting unit 601 gathers can be the first input signal and first output signal of described pixel, are specifically as follows input voltage/electric current, output voltage/electric current; Such as, the input voltage V of pixel is gathered
ccwith output voltage V
out.
First selected cell 602, for selecting according to pre-defined rule the control signal that the attribute information of described each pixel is corresponding;
Here, described electronic equipment, specifically the first selected cell 602, according to pre-defined rule, are selected and the input voltage V gathered
ccwith output voltage V
outthe first corresponding control signal or the second control signal; Under the first control signal, the output voltage V of described pixel
outdiminish; Under the second control signal, the output voltage V of described pixel
outbecome large.
First shooting unit 603, after receiving shooting order, adopts control signal corresponding to described each pixel to take described each pixel.
Here, after described electronic equipment, specifically first shooting unit 603 receives shooting instruction, during as received the operation of user to shooting push button, described control signal is utilized to take current scene and present photographic images; Because different pixels adopts corresponding control signal, thus captured by the color of image that goes out comparatively even, the obvious phenomenon of shading value difference can not be had.
As can be seen here, in the embodiment of the present invention, each pixel is according to respective attribute information, obtain corresponding control signal, namely different pixels adopts corresponding control signal, all adopts compared with same control signal, obviously can slow down the shading value difference of captured picture with prior art to multiple or all pixel cells, make picture obtain optimal display result, promote Consumer's Experience.
Electronic equipment embodiment two:
The present embodiment based on previous embodiment one,
Described first selected cell 602, for when the numerical value of described first output signal exceeds the first predetermined threshold, outputs signal described first input signal and first and does the first computing, obtain the first control signal; The first output signal of described pixel is changed according to described first control signal.
Here, the attribute information gathered for the first collecting unit 601 is output voltage and input voltage, first selected cell 602 judges whether the numerical value of the output voltage gathered exceeds the first predetermined threshold as 0.6V, when being judged as exceeding, gathered input voltage and output voltage are made additive operation, obtains the first control signal; Wherein, the input voltage due to certain pixel cell is generally fixing, so a fixed voltage value deducts one higher than after the voltage of predetermined threshold, obtains the first control signal; Under this first control signal, the output voltage of this pixel cell will reduce.
Or described first selected cell 602, for when the numerical value of described first output signal is lower than the second predetermined threshold, outputs signal described first input signal and first and does the second computing, obtain the second control signal; The first output signal of described pixel is changed according to described second control signal; Wherein, described first predetermined threshold is more than or equal to the second predetermined threshold.
Here, the attribute information gathered for the first collecting unit 601 is output voltage and input voltage, the numerical value that first selected cell 602 judges the output voltage gathered whether lower than the second predetermined threshold as 0.4V, be judged as lower than time, gathered input voltage and output voltage are made additive operation, obtains the second control signal.Input voltage due to certain pixel cell is generally fixing, so a fixed voltage value deducts one lower than after the voltage of predetermined threshold, obtains the second control signal; Under this second control signal, the output voltage of this pixel cell will increase.
The photosensitive regulating circuit schematic diagram that Fig. 4 provides for the embodiment of the present invention; Circuit shown in Fig. 4 can be considered the photosensitive regulating circuit schematic diagram for each pixel; Below in conjunction with Fig. 4, embodiments of the present invention is further illustrated.
The second circuit that circuit shown in Fig. 4 comprises the first circuit and is connected with the first circuit.Wherein, second circuit is feedback circuit, specifically negative-feedback circuit, this negative-feedback circuit, and the gate pole of M2 is no longer by the control of unified control signal, but be connected with the drain electrode of metal-oxide-semiconductor, corresponding control signal can be obtained according to input signal Vcc from output signal the different of Vout.
Further, the first circuit comprises: photodiode, electric charge overflow door pipe M3, charge sensitive diffusion capacitance C1, reset transistor M4 and source follower M1; Wherein, positive pole and the electric charge of photodiode overflow door pipe M3 and are connected, and the other end that electric charge overflows door pipe M3 is connected with the grid of charge sensitive diffusion capacitance C1, reset transistor M4, source follower M1; The other end of reset transistor M4 is connected with input voltage Vcc; The source electrode of source follower M1 is connected with input voltage Vcc.Second circuit comprises: differential amplifier DA, metal-oxide semiconductor (MOS) metal-oxide-semiconductor and row gating switch pipe M2; Wherein, two inputs of differential amplifier DA are respectively the output voltage V of pixel cell
outwith input voltage V
cC, the output of differential amplifier DA is connected with the gate pole of metal-oxide-semiconductor, and the source electrode of metal-oxide-semiconductor is connected with Vcc, and the drain electrode of metal-oxide-semiconductor is connected with row gating switch pipe M2; One end of row gating switch pipe M2 is connected with one end of source follower M1; Choose signal on a position of metal-oxide-semiconductor source side as RS signal.
The course of work of this circuit is: first open source follower M1, reset transistor M4 resets to photodiode, enters reset mode to make circuit; Then M1 is closed, enter sampling state, light exposes on photodiode and produces photogenerated charge, photogenerated charge overflows door pipe M3 through electric charge and flows through to source follower M1, source follower M1 amplifies output after being cushioned by photogenerated charge, wherein, electric charge overflows door pipe M3 can detect whole photogenerated charges that the positive pole diffusion region of whole photodiode produces, and charge sensitive diffusion capacitance C1 is for collecting the photogenerated charge of spilling; Finally open row gating switch pipe M2, entering signal reads state, and the signal of telecommunication is exported on column bus by M2.
In above process, described electronic equipment, specifically the first collecting unit 601 gather the output voltage V of current time pixel cell
outand input voltage V
cC, the first selected cell 602 judges the output voltage V gathered
outsize whether exceed the first predetermined threshold as 0.6V, when being judged as exceeding 0.6V, by gathered output voltage V
outas the negative input end of differential amplifier DA, by gathered input voltage V
cCthe positive input terminal of differential amplifier DA, by input voltage V
cCwith output voltage V
outmake additive operation, and export the gate pole that first controls signal to metal-oxide-semiconductor, this first control signal makes the gate pole of metal-oxide-semiconductor reduce, the drain voltage of metal-oxide-semiconductor reduces thereupon, under the gate voltage of the row gating switch pipe M2 be connected with the drain electrode of metal-oxide-semiconductor is at two the control reducing of-state voltage, it is also in reduction state, makes to be expert at gating switch pipe M2 when subsequent time is opened, the voltage V of output
outfor the voltage reduced.Or, gather output voltage V at the first collecting unit 601
outand input voltage V
cCafter, the first selected cell 602 judges the output voltage V gathered
outsize whether lower than the second predetermined threshold as 0.4V, when being judged as lower than 0.4V, by gathered output voltage V
outas the negative input end of differential amplifier DA, by gathered input voltage V
cCthe positive input terminal of differential amplifier DA, by input voltage V
cCadditive operation is made with output voltage Vout, and export the gate pole that second controls signal to metal-oxide-semiconductor, this first control signal makes the gate pole of metal-oxide-semiconductor increase, the drain voltage of metal-oxide-semiconductor increases thereupon, under the gate voltage of the row gating switch pipe M2 be connected with the drain electrode of metal-oxide-semiconductor is in the control of enlarging state voltage at two, it is also in enlarging state, makes to be expert at gating switch pipe M2 when subsequent time is opened, the voltage V of output
outfor the voltage increased.Wherein, the input voltage V of pixel cell is considered
cCwithin a period of time, be a fixed value, thus by an output voltage signal higher than certain threshold value and a fixed value poor, just can reach the object regulating this output voltage signal to less direction; By an output voltage signal lower than certain threshold value and a fixed value poor, just can reach the object to regulating this output voltage signal compared with general orientation.Wherein, described first predetermined threshold, the second predetermined threshold can set flexibly according to practical situations.
Generally, in the second circuit shown in Fig. 4, using the negative input end of gathered output voltage Vout as differential amplifier DA, by input voltage V
cCas positive input terminal, work as V
outwhen value is larger, by the voltage-regulation of differential amplifier, metal-oxide-semiconductor, make the V that value is larger
outto reduction future development; Work as V
outwhen value is less, by the voltage-regulation of differential amplifier, metal-oxide-semiconductor, the Vout making value less develops to augment direction.Negative input end due to differential amplifier DA is gathered output voltage V
out, so claim second circuit to be feedback circuit, specifically negative-feedback circuit, the output valve of voltage Vout can be allowed to be maintained within a certain range, to avoid the appearance of extramalization voltage.Simultaneously, adopt compared with same control signal RS with the gate pole of the M2 of the prior art i.e. multiple pixel cell that is directly connected with RS signal, no longer directly be connected with RS signal with the gate pole of the M2 in the present embodiment, but be controlled by the gate pole of metal-oxide-semiconductor and the voltage of these two positions of source electrode and each pixel cell and can obtain corresponding control signal according to the size of gathered signal, the notable difference of the picture shading value shot can be slowed down, make the color of picture be tending towards even.
In the present invention's preferred embodiment, as described in Figure 7, described electronic equipment also comprises:
Second selected cell 604, when the quantity for the input signal when described pixel is two, can according to the first pre-defined rule, choose an input signal in two input signals as described first input signal.Further, described second selected cell 604 receives the first control data of described pixel, and according to the attribute of described first control data, the corresponding input signal at least two input signals described in control is effective; Determine that described effective input signal is described first input signal.
Pixel cell shown in Fig. 4 only has an input voltage V
cc, for increasing the dynamic adjustments scope of output voltage, the present embodiment can also adopt two input voltage V
cC1and V
cC2, the second selected cell 604 selects one of them input voltage effective at synchronization.As shown in Figure 5, two input voltage V are included
cC1and V
cC2, input voltage V
cC1be connected with the source electrode of MOS 1, input voltage V
cC2be connected with the metal-oxide-semiconductor of a backward chaining and the source electrode of MOS 2; The gate pole of MOS 1 is connected with the gate pole of MOS 2, provides the first control data Control in this junction by other circuit part of electronic equipment.Second selected cell 604 receives the first control data Control, judges that the value of the first control data equals numerical value A such as A=1 and still equals numerical value B as B=0; When being judged as Control=1, MOS 1 conducting, the second selected cell 604 selects V
cC1for effective input voltage; When being judged as Control=0, MOS 2 conducting, the second selected cell 604 selects V
cC2for effective input voltage.Here, the operation principle for circuit part identical with Fig. 4 in Fig. 5 refers to aforementioned explanation, repeats no more herein.Adopt the benefit of two input voltages to be, different input voltages can be distributed and correspond to different light intensities, such as: V
cC1can use under normal circumstances at light intensity; V
cC2can cross strong at light or use under crossing dark situation, so, add the dynamic adjustments scope of output voltage, make the filming apparatus of electronic equipment better can adapt to the light of varying strength.
As can be seen here, in the present embodiment, pass through feedback circuit, the adjustment of larger output voltage to less direction can be realized, or less output voltage is to the adjustment compared with general orientation, output voltage is maintained within a certain range, avoids output voltage and occur extreme value, obviously can slow down the shading value difference of the picture shot, make color more even.
In several embodiments that the application provides, should be understood that disclosed equipment and method can realize by another way.Apparatus embodiments described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, and as: multiple unit or assembly can be in conjunction with, maybe can be integrated into another system, or some features can be ignored, or do not perform.In addition, the coupling each other of shown or discussed each part or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of equipment or unit or communication connection can be electrical, machinery or other form.
The above-mentioned unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, also can be distributed in multiple network element; Part or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in various embodiments of the present invention can all be integrated in a processing unit, also can be each unit individually as a unit, also can two or more unit in a unit integrated; Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form that hardware also can be adopted to add SFU software functional unit realizes.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in a computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: movable storage device, read-only memory (ROM, Read-Only Memory), magnetic disc or CD etc. various can be program code stored medium.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (10)
1. a photosensitive control method, is applied in electronic equipment, it is characterized in that, described method comprises:
Gather the attribute information of each pixel;
The control signal that the attribute information of described each pixel is corresponding is selected according to pre-defined rule;
After receiving shooting order, control signal corresponding to described each pixel is adopted to take described each pixel.
2. method according to claim 1, is characterized in that, the attribute information of each pixel of described collection, comprising:
Gather the first input signal of described pixel;
Gather the first output signal of described pixel;
Accordingly, the described control signal corresponding according to the attribute information of the described each pixel of pre-defined rule selection, comprising:
When the numerical value of described first output signal exceeds the first predetermined threshold, described first input signal and first are outputed signal and does the first computing, obtain the first control signal;
The first output signal of described pixel is changed according to described first control signal.
3. method according to claim 2, is characterized in that, described method also comprises:
When the numerical value of described first output signal is lower than the second predetermined threshold, described first input signal and first is outputed signal and does the second computing, obtain the second control signal;
The first output signal of described pixel is changed according to described second control signal;
Wherein, described first predetermined threshold is more than or equal to the second predetermined threshold.
4. method according to claim 2, is characterized in that, before the first input signal gathering described pixel, described method also comprises:
When the quantity of the input signal of described pixel is two,
According to the first pre-defined rule, choose an input signal in two input signals as described first input signal.
5. method according to claim 4, is characterized in that, described foundation first pre-defined rule, chooses an input signal in two input signals as described first input signal, comprising:
Receive the first control data of described pixel;
According to the attribute of described first control data, the corresponding input signal at least two input signals described in control is effective;
Determine that described effective input signal is described first input signal.
6. an electronic equipment, is characterized in that, described electronic equipment comprises:
First collecting unit, for gathering the attribute information of each pixel;
First selected cell, for selecting according to pre-defined rule the control signal that the attribute information of described each pixel is corresponding;
First shooting unit, after receiving shooting order, adopts control signal corresponding to described each pixel to take described each pixel.
7. electronic equipment according to claim 6, is characterized in that,
Described first collecting unit, for gathering the first input signal of described pixel, gathers the first output signal of described pixel;
Described first selected cell, for when the numerical value of described first output signal exceeds the first predetermined threshold, outputs signal described first input signal and first and does the first computing, obtain the first control signal;
The first output signal of described pixel is changed according to described first control signal.
8. electronic equipment according to claim 7, is characterized in that,
Described first selected cell, for when the numerical value of described first output signal is lower than the second predetermined threshold, outputs signal described first input signal and first and does the second computing, obtain the second control signal;
The first output signal of described pixel is changed according to described second control signal;
Wherein, described first predetermined threshold is more than or equal to the second predetermined threshold.
9. electronic equipment according to claim 7, is characterized in that, described electronic equipment also comprises: the second selected cell, also for:
When the quantity of the input signal of described pixel is two,
According to the first pre-defined rule, choose an input signal in two input signals as described first input signal.
10. electronic equipment according to claim 9, described second selected cell, also for:
Receive the first control data of described pixel;
According to the attribute of described first control data, the corresponding input signal at least two input signals described in control is effective;
Determine that described effective input signal is described first input signal.
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| US20070046800A1 (en) * | 2005-08-26 | 2007-03-01 | Chen Oscal T C | Apparatus of high dynamic-range CMOS image sensor and method thereof |
| CN104159050A (en) * | 2013-05-13 | 2014-11-19 | 索尼公司 | Solid-state image sensor, method for driving solid-state image sensor, and electronic device |
| CN104159051A (en) * | 2013-03-15 | 2014-11-19 | 三星电子株式会社 | Image sensor, and operating method thereof |
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| US20070046800A1 (en) * | 2005-08-26 | 2007-03-01 | Chen Oscal T C | Apparatus of high dynamic-range CMOS image sensor and method thereof |
| CN104159051A (en) * | 2013-03-15 | 2014-11-19 | 三星电子株式会社 | Image sensor, and operating method thereof |
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