CN101441312B - Imaging apparatus for automatic focusing - Google Patents
Imaging apparatus for automatic focusing Download PDFInfo
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- CN101441312B CN101441312B CN2008101823424A CN200810182342A CN101441312B CN 101441312 B CN101441312 B CN 101441312B CN 2008101823424 A CN2008101823424 A CN 2008101823424A CN 200810182342 A CN200810182342 A CN 200810182342A CN 101441312 B CN101441312 B CN 101441312B
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Abstract
The invention provides an image pick-up for automatic focus (AF), which may restrain scale increase and function reduction of a circuit, and be used corresponding to a plurality of AF optical systems. The image pick-up for automatic focus (AF) comprises a plurality of islands (h2bb-h4dr) composed of a plurality of pixels configured between a standard section (120a1) zone and a reference section (120a2) zone, control parameters are set according to each pair of islands, the pair of islands are composed of a stand section island and a reference section land in prescriptive corresponding relation, the stand section and reference section are used for receiving light beams from the object of automatic focus after pupil partition, the image pick-up for automatic focus (AF) comprises a plurality of registers (Reg_H2b-Reg_h4d) setting control parameters according to each said island; a first type island pair referring to a same register as a reference in the stand section island and the reference section land; a second island pair referring to a respective register as a reference in the stand section island and the reference section land.
Description
Technical field
The present invention relates to a kind of automatic focusing and use imaging apparatus, this is focused with imaging apparatus automatically is to be used for the automatic focusing of optical devices such as digital camera and video camera with solid camera heads such as line sensor and two-dimensional image sensor.
Background technology
In the past; In patent documentation 1, disclose following mode: in the imaging apparatus of a plurality of pixel columns of the automatic focusing of having of single-lens reflex camera (AF) usefulness; But make a plurality of line sensors and monitoring sensor form the structure of drive controlling through external signal, make it corresponding with different types of focus detection optical system with the mode of combination in any.
2004-No. 272238 communiques of [patent documentation 1] TOHKEMY
In above-mentioned patent documentation 1 disclosed mode; Mode with combination in any makes a plurality of line sensors and monitoring sensor become movable structure, but to setting so not records of function such as light sensitivity, gain, savings end level according to the combination of a plurality of line sensors.
When according to each the register that setting item uses can corresponding optical system being set, exist circuit scale increase, cost up and installing space to receive problems such as serious restriction for above-mentioned functions is installed.
Summary of the invention
The present invention In view of the foregoing accomplishes just, the objective of the invention is to, provide a kind of can suppress circuit scale increase reduce with function in, the automatic focusing of the use of the corresponding a plurality of AF optical systems of ability uses imaging apparatus.
Automatic focusing of the present invention is that imaging apparatus is used in a kind of automatic focusing with a form of imaging apparatus; Have and be configured in benchmark portion and with reference to a plurality of islands that constitute by a plurality of pixels in these two zones of portion; Can be according to each to the island to setting controlled variable; Above-mentioned island is to being right with reference to the island that the portion island constitutes by the benchmark portion island that is in the regulation corresponding relation and one; And said reference portion and be used to receive with reference to portion the light beam from the object of focusing is automatically carried out the light beam after pupil is cut apart, it is characterized in that this automatically focusing have with imaging apparatus: a plurality of registers, they set controlled variable according to each above-mentioned island; The island of the first kind is right, they on right benchmark portion island, above-mentioned island with reference to the portion island in reference to same register; And the island of second type is right, they on benchmark portion island with reference to the portion island in reference to separately register.
According to the present invention, can provide a kind of circuit scale that can either suppress to increase with the function reduction, can use imaging apparatus with the corresponding automatic focusing of the use of a plurality of AF optical systems again.
Description of drawings
Fig. 1 has installed the structured flowchart of the automatic focusing of one embodiment of the present invention with the camera of imaging apparatus.
Fig. 2 is the synoptic diagram of the AF optical system of Fig. 1 camera.
Fig. 3 (A) is the front elevation of the AF sensor that describes of the effective island when to be used for the automatic focusing of an embodiment be 11 dot patterns of AF sensor with imaging apparatus, and Fig. 3 (B) is the figure of the example of ordering of the AF in the photographic picture when 11 dot patterns are shown.
Fig. 4 (A) is the front elevation of the AF sensor that describes of the effective island when being used for 7 dot patterns, and Fig. 4 (B) is the figure of the example of ordering of the AF in the photographic picture when 7 dot patterns are shown.
Fig. 5 is structure and the figure of output circuit portion that the pixel column of AF sensor is shown.
Fig. 6 is the figure that the pixel portions peripheral structure of AF sensor is shown.
Fig. 7 is the sequential chart of the control sequence that resets/put aside that the valid pixel portion of AF sensor is shown.
Fig. 8 is the figure of structure that the monitoring pixel control circuit of AF sensor is shown.
Fig. 9 is the figure of sequential chart of the control sequence that resets/put aside that the monitoring pixel portions of AF sensor is shown.
Figure 10 is the figure that pixel data that the AF sensor is shown reads the sequential chart of sequence.
Figure 11 is the figure that the correspondence table of asking the constantly paired combination of island in 11 dot patterns and 7 dot patterns of the related operation of two pictures during spacing values in the AF computing that is illustrated in the phase differential mode is shown.
Figure 12 illustrates each island control of expression with the figure of register with the correspondence table of the corresponding relation on the controlling object island of in 11 dot patterns and 7 dot patterns, using.
Figure 13 A is the figure of the corresponding relation that is connected on register and each horizontal island when 11 dot patterns of correspondence table of Figure 12 are shown.
Figure 13 B is the figure of the corresponding relation that is connected on register and each horizontal island when 7 dot patterns of correspondence table of Figure 12 are shown.
Figure 14 A is the figure of the corresponding relation that is connected on register and each vertical island when 11 dot patterns of correspondence table of Figure 12 are shown.
Figure 14 B is the figure of the corresponding relation that is connected on register and each vertical island when 7 dot patterns of correspondence table of Figure 12 are shown.
Symbol description
101: camera body; 102: change camera lens; 103:CPU; The 104:AF sensor; 106: prism; 105:AF computing IC; 107: eyepiece; 108: collector lens; 109: dialyte lens; 110: imaging apparatus; 111: principal reflection mirror; 112: secondary catoptron; 113: the view finder screen; 114: the shooting equivalent face; 115: catoptron; 116: separate aperture; 117: to focus lens; 118: motor driver; 119: camera lens CPU; 120a: horizontal pixel row; 120a1: horizontal direction benchmark portion pixel column; 120a2: horizontal direction is with reference to portion's pixel column; 120b: vertical pixel row; 120b1: vertical direction benchmark portion pixel column; 120b2: vertical direction is with reference to portion's pixel column; 121: photographic picture; 122: point distance measurement; 123: the shading pixel; 124: inactive pixels; 125: valid pixel; 126: electric charge passes on the path; 127: reading part; 128: pixel is used the charge voltage converter section; 129: gain-controlled amplifier; 130: output pixel column selection portion; 131a～131c: pixel output dip switch; 132: buffer amplifier; 133: the monitoring pixel; 134: the charge voltage converter section is used in monitoring; 135: photodiode (PD portion); 136: the 1 transmission gates; 137: storer (ST portion); 138: the second transmission gates; 139: electric charge passes on path (CCD portion); 140: negative circuit; 141: on-off circuit; 142: integrating condenser; 143: the savings control circuit; Reg_h2b～Reg_h2d, Reg_h3a～Reg_h3e, Reg_h4b～Reg_h4d, Reg_v2b～Reg_v2d, Reg_v3a～Reg_v3e, Reg_v4b～Reg_v4d: register; Reg_cnt_h2b～Reg_cnt_h2d, Reg_cnt_h3a～Reg_cnt_h3e, Reg_cnt_h4b～Reg_cnt_h4d, Reg_cnt_v2d～Reg_cnt_v2d, Reg_cnt_v3a～Reg_cnt_v3e, Reg_cnt_v4b～Reg_v4d: control circuit.
Embodiment
Below, with reference to accompanying drawing the best mode that is used for embodiment of the present invention is described.
Fig. 1 illustrates as the block diagram of the automatic focusing of one embodiment of the present invention with the structure of the single-lens reflex camera of the lens-interchangeable of the camera of imaging apparatus has been installed.
As shown in the drawing, this camera by camera body 101 with can constitute with respect to the replacing camera lens 102 that this camera body 101 loads and unloads.
Comprise following optical system and parts in camera body 101 inside.That is, in camera body 101, comprise: the CPU103 that constitutes the system controller of control camera action; The automatic focusing of this embodiment is with the AF sensor 104 of imaging apparatus; Control the AF computing IC105 of this AF sensor 104; The finder optical system that constitutes by prism 106 and eyepiece 107 grades; The AF optical system that constitutes by collector lens 108 and dialyte lens 109 grades; The imaging apparatus 110 that receives the object light bundle and make a video recording; Be used for the object light bundle is guided to the principal reflection mirror 111 of finder optical system; And the secondary catoptron 112 that is used for the object light bundle is guided to the AF optical system.
In addition, the prism 106 of finder optical system is in order to show the erect image of being taken the photograph body as the view finder picture and the shot object image that overturns, and eyepiece 107 makes to be taken the photograph volume imaging and be used as the view finder picture.In addition, finder optical system also comprises view finder screen 113, and this view finder screen 113 comes projection to penetrate the object light bundle of photographic optical system through principal reflection mirror 111.
In addition, 112 pairs of transmissions of secondary catoptron are crossed photographic optical system and have been passed through the object light Shu Jinhang reflection of the semi-transparent semi-reflecting lens portion of principal reflection mirror 111, and guiding AF optical system.Shot object image imaginary plane focusing, collector lens 108 fronts the equivalent face of making a video recording when in addition, the reference marks among the figure 114 is illustrated in transmission and crosses the object light bundle of photographic optical system and on imaging apparatus 110, be in focusing state.
The AF optical system is by constituting with lower component: to the collector lens 108 that sees through photographic optical system and assembled by the object light Shu Jinhang of secondary catoptron 112 reflections; To the object light Shu Jinhang reflection of inciding the AF optical system via secondary catoptron 112 and the catoptron 115 of the AF sensor 104 that leads; Be used for separation aperture 116 that the object light Shu Jinhang pupil of being assembled by collector lens 108 is cut apart; And make utilization separate the dialyte lens 109 that aperture 116 carries out the object light Shu Zuowei shot object image reimaging on AF sensor 104 after pupil is cut apart.
AF computing IC105 is formed by the hardware integrated circuit, and the automatic focusing of this this embodiment of hardware integrated circuit control is an AF sensor 104 with imaging apparatus, goes forward side by side and exercises the part with the AF computing of its output data.Carry out the action control of this AF computing IC105 through CPU103 as the system controller that carries out various camera actions and s operation control.
On the other hand, make shot object image imaging on the imaging apparatus 110, can be with respect to the replacing camera lens 102 of camera body 101 loading and unloading by constituting with lower component: driven focal adjustments is used focus lens 117 on the optical axis direction of this replacing camera lens 102 in order to obtain focusing state; Be used to drive this motor driver 118 to focus lens 117; And camera lens CPU119, it receives amount from camera body 101, the drive amount of convergent lens 117 is carried out computing, and come drive controlling to focus lens 117 with this drive amount.
Next, the automatic focusing to an embodiment of the present invention is that the action of AF sensor 104 in camera describes with imaging apparatus.
Fig. 2 is the figure that the pixel of the AF optical system that is incorporated with AF sensor 104 and AF sensor 104 is shown, and in the drawings, 120a illustrates the horizontal pixel row of AF sensor 104, and 120b illustrates the vertical pixel row of AF sensor 104.Identical about other optical units with the explanation of Fig. 1.
Fig. 3 (A) and Fig. 4 (A) are the front elevations that AF sensor 104 is shown, and it is being to be 5 row on 3 row, the vertical direction on the horizontal direction of AF sensor 104 that the pixel column that will be divided into 2～5 (below be called island (island)) is configured to.In addition, in Fig. 3 (A) and Fig. 4 (A), having illustrated and not indicated hatched island is effective island, and indicating hatched island is invalid island.In addition, horizontal pixel row 120a is made up of with reference to the pixel column 120a2 of portion pixel column 120a1 of horizontal direction benchmark portion and horizontal direction, and vertical pixel row 120b is made up of with reference to the pixel column 120b2 of portion pixel column 120b1 of vertical direction benchmark portion and vertical direction.
For example; When being the 1AF optical system of datum line length between the center that between the center of center of establishing island h3cb on the horizontal direction that is applied in Fig. 3 (A) and h3cr is datum line length and the center of establishing island v3cb in vertical direction and v3cr; Can through set each island as Fig. 3 (A) shown in effectively/invalid, come on 11 the whole point distance measurements 122 separately in the photographic picture 121 shown in Fig. 3 (B) with level, vertically both direction constitutes known phase differential mode AF.
For example; When between the center of center of establishing island h3db on the horizontal direction that is applied in Fig. 4 (A) and h3br for datum line length and establish between the center of center and v2cr of island v4cb to datum line length in vertical direction, when being datum line length less than the 2AF optical system of 1AF optical system; Can through set each island shown in Fig. 4 (A) effectively/invalid, come on 7 the point distance measurement 122 the photographic picture 121 shown in Fig. 4 (B) in a part of level, all vertically both direction constitutes known phase differential mode AF.
In addition, the said reference line length optically with the optical axis of dialyte lens 109 (separating aperture 116) at interval about equally.In being made as invalid island like this,, therefore can not carry out suitable range finding because occlusion effect (け ら れ) etc. do not arrive effective light beam.
In addition, the hatched x1b～x3b of sign, x1r～x3r island are islands that untapped 7 dot patterns are used when 11 dot patterns in Fig. 3 (A), when 7 dot patterns, shown in Fig. 4 (A), play a role as effective island.
The switching of setting about the island of 11 point/7 dot patterns etc. is narrated in the back; But the automatic focusing according to set this embodiment via AF computing IC105 from the order of CPU103 is the control circuit and the register of AF sensor 104 with imaging apparatus, and carries out the setting on island.
Fig. 5 is for the purpose of simplifying the description and diagram, and takes out the horizontal direction of AF sensor 104 illustrates its structure and output circuit portion with reference to the h2 row of the pixel column 120a2 of portion (in 3 row of Fig. 3 (A) above-listed) figure.
Pixel portions is made up of a plurality of shading pixel 123, inactive pixels 124 and valid pixel 125, and valid pixel portion is split into three islands through inactive pixels 124.
The pixel portions of two row up and down that constitutes this h2 row 1/2 of the pel spacing that respectively staggers is configured, and passes on path 126 from the electric charge of pixel portions output via the electric charge of configuration up and down, again via reading part 127, is input to pixel with charge voltage converter section 128.Pixel uses charge voltage converter section 128 by charge conversion is constituted as FDA of voltage etc., and passing on the charge conversion that path 126 passes on alternatively up and down through electric charge is voltage.
Voltage signal after the conversion is input to output pixel column selection portion 130 via gain-controlled amplifiers 129 such as CDS amplifiers.
Be input to of the switch control of the voltage signal of output pixel column selection portion 130, via buffer amplifier 132, to the output of the outside of AF sensor 104 according to the pixel output dip switch 131a in the output pixel column selection portion 130.In addition, the pixel output dip switch 131a of output pixel column selection portion 130 is controlled by AF computing IC105.
In addition, between the pixel portions of two row up and down, the monitoring pixel of when savings control, utilizing 133 has disposed the number identical with the island, and the reset signal Ф RM line that makes monitoring pixel 133 with export signal vmonl～3 and be connected.
The electric charge that in monitoring pixel 133, produces converts voltage signal by monitoring into charge voltage converter section 134, to not shown savings control circuit output.
The horizontal direction of AF sensor 104 also becomes structure same as described above with reference to the pixel column beyond the h2 of the pixel column 120a2 of the portion row and other level, vertical pixel row, has four pixel data lead-out terminals as AF sensor 104.
Fig. 6 is the figure that near the structure the pixel portions of AF sensor 104 is shown.In the figure, reference marks 135 illustrates photodiode (PD portion), and 136 illustrate the 1st transmission gate, and 137 illustrate storer (ST portion), and 138 illustrate the 2nd transmission gate, and 139 illustrate electric charge passes on path (CCD portion).In addition; TG1 illustrates the ON/OFF control signal of the 1st transmission gate 136; TG2 illustrates the ON/OFF control signal of the 2nd transmission gate 138; Ф RS illustrates and is used for the reset signal that the unwanted charge with ST portion 137 resets, and the electric charge that Ф 1, Ф 2 are illustrated in the antiphase of being supplied with when electric charge in the CCD portion 139 passes on passes on clock signal.
The object light Shu Jinhang opto-electronic conversion of PD135 to being formed images, output is corresponding to the electric charge of incident light quantity.The 1st transmission gate 136 passes on electric charge from PD portion 135 to ST portion 137 through the TG1 signal.The ST portion 137 interim electric charges that pass on from PD portion 135 of preserving.The 2nd transmission gate 138 passes on electric charge from ST portion 137 to CCD portion 139 through the TG2 signal.CCD portion 139 passes on to electric charge according to the frequency of passing on of Ф 1, Ф 2 signals.
Fig. 7 be illustrate in the AF sensor 104 from the savings control sequence to reading the simple sequential chart that sequence begins.
At first, through (L → H → L) import the 1st transmission gate 136 resets the electric charge that do not need of PD portion 135, and through Ф RS is made as the H state, the electric charge that do not need of ST portion 137 resetted, and utilizes the H → L of this Ф RS signal to begin the savings action with the TG1 pulse.
Next, when the vmon signal from 133 outputs of monitoring pixel arrives specified level VTH, to the 136 input TG1 pulses of the 1st transmission gate,, the electric charge of in PD portion 135, putting aside finishes the savings action once more thereby being transferred to ST portion 137.
In addition, through input TG2 pulse (L → H → L), electric charge is passed on from ST portion 137 to CCD portion 139 after the TG1 pulse.
Fig. 8 is that the automatic focusing that this embodiment is shown is the figure of the structure of the monitoring pixel control circuit in the AF sensor 104 with imaging apparatus.
Monitoring pixel (MPD) the 133rd is used for the PD that the savings level of AF sensor light accepting part is monitored.Monitor with charge voltage converter section 134 by the negative circuit 140 that is used for the reset signal Ф RM counter-rotating of monitoring pixel 133; Through reset signal Ф RM control, be used for the on-off circuit 141 that the savings level with monitoring pixel 133 resets; And the integrating condenser 142 that is used for the electric charge that produces in monitoring pixel 133 is put aside constitutes.Such monitoring is that monitor signal vmon is input to the savings control circuit 143 that carries out the savings control of AF sensor light accepting part according to the savings level of monitoring pixel 133 with the output signal of charge voltage converter section 134.
Fig. 9 is the figure that the simple sequential chart of the Monitoring and Controlling in the savings control sequence is shown.
Through making monitoring change L from H, remove resetting of monitoring pixel 133, through the savings in the monitoring pixel 133 beginning integrating condensers 142 with reset signal Ф RM.After beginning savings, monitor signal vmon puts aside to the direction that voltage reduces from reference voltage V REF.
143 couples of such monitor signal vmon of savings control circuit monitor, and when monitor signal vmon arrived savings end voltage VTH, the TG1 pulse was to 136 inputs of the 1st transmission gate, the savings release in the PD portion 135.
Figure 10 is horizontal direction that AF sensor 104 is shown reads sequence with reference to the pixel data of the pixel column 120a2 of portion a sequential chart.
At first, the pulse of the 2nd transmission gate control signal TG2_h3 through h3 row, the beginning horizontal direction is passed on reference to the electric charge of the h3 row of the pixel column 120a2 of portion.Meanwhile; As pixel output dip switch control signal sw_cont_h3 through the h3 row; Make pixel output dip switch 131b (with reference to Fig. 5) when becoming on-state; Shown in figure 10, the order of the reading part 127 that each data is listed as according to h3, shading pixel 123, inactive pixels 124, valid pixel 125 outputs to the outside of AF sensor 104.
Next, in the electric charge of the valid pixel 125 that h3 is listed as passed on, the pulse of the 2nd transmission gate control signal TG2_h2 of h2 row was imported into the h2 row.But at this constantly, the pixel output dip switch 131a of h2 row becomes off-state, and the data of the valid pixel 125 of h3 row are outputed to the outside of AF sensor 104.
In addition; In the moment of the data end of output of the valid pixel 125 of h3 row; Pixel output dip switch control signal sw_cont_h3 through the h3 row makes pixel output dip switch 131b become off-state, through the pixel output dip switch control signal sw_cont_h2 of h2 row; Make pixel output dip switch 131a become on-state, the data of the valid pixel 125 that after the data of the valid pixel 125 that h3 is listed as, h2 is listed as thus output to the outside of AF sensor 104.
That is, finish and output h2 shows and imitates pixel data and begin these two moment that action is continuous in effective pixel data as stated, the pulse of the 2nd transmission gate control signal TG2_h2 of h2 row is input to the h2 row to the outside of AF sensor 104 output h3 row.
Pass on about the electric charge of h2 row and h4 row and to begin and the timing of pixel output dip switch 131a, 131c (with reference to Fig. 5) on/off; Also carry out and above-mentioned same control, the data that make h3 be listed as the valid pixel 125 of h4 row thus output to the outside of AF sensor 104 continuously.
Next, with reference to Figure 11～Figure 14 B, the automatic focusing about this embodiment is described with 11 dot patterns of the AF sensor 104 of imaging apparatus and the island setting in 7 dot patterns etc.
Figure 11 illustrates the correspondence table that is illustrated in according in the AF of phase differential mode computing, ask the constantly paired combination of island in 11 dot patterns and 7 dot patterns of the related operation of two pictures during spacing values from the output data of AF sensor 104.
In addition, Figure 12 illustrates and is illustrated in interior each island control that constitutes of AF computing IC105 with the relation of register with the controlling object island of correspondence, and the correspondence table of the relation of the register setting value under each situation of 11 dot patterns and 7 dot patterns.
In addition, the combination on paired island in the related operation when the four-headed arrow shown in the right side of the correspondence table of Figure 12 is illustrated in 7 dot patterns.
In addition, the register setting value a～v in the correspondence table of Figure 12 is the variable that is illustrated in the control code of the regulation figure place of setting in the register.Variable with other in the correspondence table of Figure 12 representes, 11 points, 7 the combination on island of each point distance measurement of each pattern are distinguished easily, the combination on the island of each point distance measurement when island of having set identical variable representes to constitute and 7 dot patterns at 11.
Below, describe in more detail.
The island that the register of register Reg_h2b～Reg_v4d of decision reflection Figure 12 is set is so that the benchmark portion during related operation, be relation shown in figure 11 with reference to the corresponding relation on each island of portion.
For example, when 11 dot patterns, the control code a that sets among the register Reg_h2b is reflected as h2bb island and h2br island, in these two islands, controls with identical setting keeping watch on characteristic, light sensitivity and gain etc.
In addition, in based on benchmark portion and known related operation, in order to ask benchmark portion and with reference to the correlativity of the view data of portion, the similarity of view data becomes important with reference to the pixel data of portion.Thus, preferred reference portion becomes identical characteristic with pixel data with reference to portion.Therefore, will as benchmark portion with reference to the light sensitivity of the gain-controlled amplifier 129 of the characteirstic element of portion, buffer amplifier 132 etc. and gain be set at as the savings end voltage VTH that keeps watch on characteristic etc. identical.
During 7 dot patterns; The corresponding relation on paired island changes to h2db island and h2br island in identical h2 row in related operation, therefore, and in this case; Can come the identical control of execution in above-mentioned two islands through in register Reg_h2b and register Reg_h2d, setting identical control code a.
Figure 13 A～Figure 14 B schematically illustrates the relation on above-mentioned each register and each island in each pattern.That is, Figure 13 A is the figure of the corresponding relation that is connected on register and each horizontal island when 11 dot patterns of correspondence table of Figure 12 are shown, and Figure 13 B is the figure of the corresponding relation that is connected on register and each horizontal island when 7 dot patterns of correspondence table of Figure 12 are shown.In addition, Figure 14 A is the figure of the corresponding relation that is connected on register and each vertical island when 11 dot patterns of correspondence table of Figure 12 are shown, and Figure 14 B is the figure of the corresponding relation that is connected on register and each vertical island when 7 dot patterns of correspondence table of Figure 12 are shown.
In addition, in these Figure 13 A～Figure 14 B, do not mark hatched part and be illustrated in each pattern and be effective island, register and control circuit, indicate hatched part and be illustrated in and be invalid island, register and control circuit in each pattern.In addition, solid line is illustrated in and is effective control line in each pattern, is shown in dotted line in each pattern, to be invalid control line.
Register Reg_h2b～Reg_h2d, Reg_h3a～Reg_h3e, Reg_h4b～Reg_h4d, Reg_v2b～Reg_v2d, Reg_v3a～Reg_v3e, Reg_v4b～Reg_v4d and control circuit Reg_cnt_h2b～Reg_cnt_h2d, Reg_cnt_h3a～Reg_cnt_h3e, Reg_cnt_h4b～Reg_cnt_h4d, Reg_cnt_v2b～Reg_cnt_v2d, Reg_cnt_v3a～Reg_cnt_v3e, Reg_cnt_v4b～Reg_v4d are formed in the AF sensor 104, through carry out the setting of control circuit Reg_cnt_* (* is each control circuit title) from the control signal of AF computing IC105.
Thus, the annexation when Figure 13 A～Figure 14 B illustrates and in each register Reg_* (* is each register title), sets control code through register controlled circuit Reg_cnt_*, this control code is used for paired island is made as same controlled condition.
For example, in 11 dot patterns, h3cb island and h3cr island are paired relations, so constitute through control circuit Reg_cnt_h3cb identical control code are write register Reg_h3cb and Reg_h3cr.
As stated; According to the kind of the AF optical system of using be 11 with or 7 with; CPU10 imports AF sensor 104 through AF computing IC105 with control signal; Control circuit Reg_cnt_* to the inside of AF sensor 104 sets, and can the setting on island be made as 11 dot patterns or 7 dot patterns through this control circuit Reg_cnt_*.
As stated; According to this embodiment; Need not according to preparing different registers with each of the corresponding a plurality of AF optical systems of same AF sensor 104; Through change register setting value, change that just can corresponding A F optical system, therefore can obtain to suppress the circuit scale increase again can corresponding such effect with the use of a plurality of AF optical systems.
[variation]
More than, describe the present invention according to an embodiment, but the invention is not restricted to above-mentioned embodiment, obviously can in purport scope of the present invention, carry out various distortion and application.
For example; In an above-mentioned embodiment; Through set the control circuit Reg_cnt_* of the inside of AF sensor 104 from the control signal of AF computing IC105, Reg_cnt_* controls the setting of register Reg_* through this control circuit, but as variation; Can constitute directly and set such structure, so that the corresponding relation in each pattern is shown in the correspondence table of Figure 12 from the outside of sensor Reg_4*.At this moment, directly carry out the setting of register Reg_* through the control signal of AF computing IC105.
In this case, need to carry out the processing such as change of the register combination of in control circuit Reg_cnt_*, carrying out, but have the circuit scale that to cut down the control circuit part, make cost reduce such effect.
In addition, be not limited to 11 dot patterns and 7 dot patterns, also can be set at more multiple spot pattern.
Claims (5)
1. imaging apparatus is used in an automatic focusing; Have and be configured in benchmark portion and with reference to a plurality of islands that constitute by a plurality of pixels in these two zones of portion; Can be according to each to the island to setting controlled variable, above-mentioned island is to being right with reference to the island that the portion island constitutes by benchmark portion island of the corresponding relation with regulation and one, and said reference portion and be used to receive with reference to portion the light beam from the object of focusing is automatically carried out the light beam after pupil is cut apart; It is characterized in that
Automatically focusing has with imaging apparatus:
A plurality of registers, they set controlled variable according to each above-mentioned island;
The island of the first kind is right, they on right benchmark portion island, above-mentioned island with reference to the portion island in reference to same register; And
The island of second type is right, they on benchmark portion island with reference to the portion island in reference to separately register.
2. imaging apparatus is used in automatic focusing according to claim 1, it is characterized in that,
The island that constitutes the above-mentioned first kind to and have afore mentioned rules corresponding relation benchmark portion island with reference to the portion island benchmark portion with reference to the identical position that is configured in each zone of portion.
3. imaging apparatus is used in automatic focusing according to claim 1, it is characterized in that,
Have the benchmark portion that directs the light beam into above-mentioned imaging apparatus with imaging len and with reference to portion with the automatic focusing of imaging len with optical system in; Second optical system is compared with right all effective first optical system of all pixel datas in the island of above-mentioned first and second types; Benchmark portion is with imaging len with reference to optical axis interval narrow, the efficient beam narrow range of portion with imaging len; Under the situation of using second optical system
The island of the above-mentioned first kind is to being right benchmark portion island, above-mentioned island and being that invalid island is right with reference to the pixel data on any island in the portion island.
4. imaging apparatus is used in automatic focusing according to claim 1, it is characterized in that,
Have the benchmark portion that directs the light beam into above-mentioned imaging apparatus with imaging len and with reference to portion with the automatic focusing of imaging len with optical system in; Second optical system is compared with right all effective first optical system of all pixel datas in the island of above-mentioned first and second types; Benchmark portion is with imaging len with reference to optical axis interval narrow, the efficient beam narrow range of portion with imaging len; Under the situation of using second optical system
The island of above-mentioned second type is to being right benchmark portion island, above-mentioned island and right with reference to all effective island of the pixel data on these two islands, portion island.
5. use imaging apparatus according to claim 3 or 4 described automatic focusings, it is characterized in that,
Automatically focusing except a plurality of islands with the right first kind in the island that belongs to above-mentioned first and second types, only also has a plurality of islands of effective second type of pixel data in the island when above-mentioned second optical system of application with imaging apparatus,
The invalid shared register that carries out reference in island of pixel data in a plurality of islands of above-mentioned second type and the island when using above-mentioned second optical system.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007303435A JP5019385B2 (en) | 2007-11-22 | 2007-11-22 | Autofocus image sensor |
| JP2007-303435 | 2007-11-22 | ||
| JP2007303435 | 2007-11-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101441312A CN101441312A (en) | 2009-05-27 |
| CN101441312B true CN101441312B (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101823424A Expired - Fee Related CN101441312B (en) | 2007-11-22 | 2008-11-21 | Imaging apparatus for automatic focusing |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5019385B2 (en) |
| CN (1) | CN101441312B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6257396B2 (en) | 2014-03-18 | 2018-01-10 | キヤノン株式会社 | FOCUS DETECTION DEVICE, ITS CONTROL METHOD, PROGRAM, AND STORAGE MEDIUM |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6819360B1 (en) * | 1999-04-01 | 2004-11-16 | Olympus Corporation | Image pickup element and apparatus for focusing |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2757852B2 (en) * | 1986-05-16 | 1998-05-25 | ミノルタ株式会社 | Focus detection device |
| JPS6413878A (en) * | 1987-07-08 | 1989-01-18 | Fuji Photo Film Co Ltd | Manufacture of image sensor for detecting automatic focus |
| JP3789012B2 (en) * | 1996-09-27 | 2006-06-21 | キヤノン株式会社 | Photoelectric conversion device, imaging device, and focus detection device using the same |
| JP2004012815A (en) * | 2002-06-06 | 2004-01-15 | Sigma Corp | Autofocus camera |
| JP2006064956A (en) * | 2004-08-26 | 2006-03-09 | Canon Inc | Solid-state imaging device for automatic focusing and automatic focusing camera using same |
| JP4649974B2 (en) * | 2004-12-16 | 2011-03-16 | 株式会社ニコン | Focus detection device, camera |
| JP2006178076A (en) * | 2004-12-21 | 2006-07-06 | Olympus Corp | Focus detector for camera |
-
2007
- 2007-11-22 JP JP2007303435A patent/JP5019385B2/en not_active Expired - Fee Related
-
2008
- 2008-11-21 CN CN2008101823424A patent/CN101441312B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6819360B1 (en) * | 1999-04-01 | 2004-11-16 | Olympus Corporation | Image pickup element and apparatus for focusing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101441312A (en) | 2009-05-27 |
| JP5019385B2 (en) | 2012-09-05 |
| JP2009128632A (en) | 2009-06-11 |
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