CN107124536A - Double-core focus image sensor and its focusing control method and imaging device - Google Patents
Double-core focus image sensor and its focusing control method and imaging device Download PDFInfo
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- CN107124536A CN107124536A CN201710296855.7A CN201710296855A CN107124536A CN 107124536 A CN107124536 A CN 107124536A CN 201710296855 A CN201710296855 A CN 201710296855A CN 107124536 A CN107124536 A CN 107124536A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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Abstract
The invention discloses a kind of double-core focus image sensor and its focusing control method and imaging device, wherein, double-core focus image sensor includes：Photosensitive unit array, it is arranged on the filter unit array on the photosensitive unit array, and the microlens array on the filter unit array, wherein, the microlens array includes the first lenticule and the second lenticule, one first lenticule covers a white filter unit, one white filter unit covers a focusing photosensitive unit, the white filter unit is made up of N*N adjacent right angled triangles, the area of one white filter unit is the half of a focusing photosensitive unit, one the second lenticule covers a double-core focusing photosensitive pixel.The double-core focus image sensor of the embodiment of the present invention, by increasing capacitance it is possible to increase the thang-kng amount of focusing pixel, hardware foundation is provided to lift the focusing speed under low luminous environment and improving the accuracy of color rendition.
Description
Technical field
The present invention relates to vision facilities technical field, more particularly to a kind of double-core focus image sensor and its focusing control
Method and imaging device.
Background technology
In related focusing technology, double-core both full-pixel focusing technology turns into state-of-the-art focusing technology in the market.
Be compared to contrast focusing, laser focusing and phase focusing technology, double-core both full-pixel focus technology focusing speed faster, it is and right
Burnt scope is wider.Further, since in double-core both full-pixel focusing technology, " double-core " photodiode " merging " in imaging is one
Pixel is exported, and can not influence image quality while focusing performance is ensured.
However, because when use double-core both full-pixel focusing technology is focused, the photodiode of each pixel is by one point
For two, reduce thang-kng amount, and then cause double-core focusing under low luminous environment difficult.
The content of the invention
The purpose of the present invention is intended at least solve one of above-mentioned technical problem to a certain extent.
Therefore, first purpose of the present invention is to propose a kind of focusing control method of double-core focus image sensor,
This method can increase the thang-kng amount of focusing pixel, effectively lift the focusing speed under low luminous environment, while improving color rendition
Accuracy.
Second object of the present invention is to propose a kind of double-core focus image sensor.
Third object of the present invention is to propose a kind of imaging device.
Fourth object of the present invention is to propose a kind of mobile terminal.
To achieve these goals, first aspect present invention embodiment proposes a kind of focusing of double-core focus image sensor
Control method, wherein, the double-core focus image sensor includes：Photosensitive unit array, it is arranged on the photosensitive unit array
On filter unit array and the microlens array on the filter unit array, wherein, the microlens array bag
The first lenticule and the second lenticule are included, first lenticule covers a white filter unit, the white
Filter unit covers a focusing photosensitive unit, and the white filter unit is made up of N*N adjacent right angled triangles, one
The area of the white filter unit is the half of a focusing photosensitive unit, and second lenticule covers a double-core
Focusing photosensitive pixel, the described method comprises the following steps：
The photosensitive unit array is controlled to enter focal modes；
Read the poor information of first phase of the focusing photosensitive unit and the second phase of double-core focusing photosensitive pixel
Poor information；
Focusing control is carried out according to the poor information of the first phase and the poor information of the second phase.
The focusing control method of the double-core focus image sensor of the embodiment of the present invention, based on the first lenticule covering
One square white filter unit, a white filter unit covers the center section of a focusing photosensitive unit, area coverage
The half of focusing photosensitive unit is accounted for, second lenticule covers a double-core focusing photosensitive pixel, photosensitive by reading focusing
The poor information of second phase of the poor information of the first phase of unit and double-core focusing photosensitive pixel, and according to the poor information of first phase and
Second phase difference information carries out focusing control, by increasing capacitance it is possible to increase the thang-kng amount of focusing pixel, effectively lifts the focusing under low luminous environment
Speed, while improving the accuracy of color rendition.
To achieve these goals, second aspect of the present invention embodiment proposes a kind of double-core focus image sensor, bag
Include：Photosensitive unit array, is arranged on the filter unit array on the photosensitive unit array, and positioned at filter unit battle array
Microlens array on row, wherein, the microlens array includes the first lenticule and the second lenticule, one described first
Lenticule covers a white filter unit, and a white filter unit covers a focusing photosensitive unit, the white
Filter unit is made up of N*N adjacent right angled triangles, and the area of a white filter unit is a focusing
The half of photosensitive unit, second lenticule covers a double-core focusing photosensitive pixel.
The double-core focus image sensor of the embodiment of the present invention, includes the first lenticule and the second lenticule by setting
Microlens array, first lenticule covers a square white filter unit, and a white filter unit covering one is right
The center section of burnt photosensitive unit, area coverage accounts for the half of focusing photosensitive unit, and second lenticule covers a double-core
Focusing photosensitive pixel, by increasing capacitance it is possible to increase the thang-kng amount of focusing pixel, to lift the focusing speed under low luminous environment and improving color also
Former accuracy provides hardware foundation.
To achieve these goals, third aspect present invention embodiment proposes a kind of imaging device, the imaging device bag
Include：The double-core focus image sensor that above-mentioned second aspect embodiment is proposed；And control module, the control module controls described
Photosensitive unit array enters focal modes；Read the poor information of first phase and the double-core focusing sense of the focusing photosensitive unit
The poor information of the second phase of light pixel；Focusing control is carried out according to the poor information of the first phase and the poor information of the second phase
System.
The imaging device of the embodiment of the present invention, a square white filter unit, one are covered based on first lenticule
Individual white filter unit covers the center section of a focusing photosensitive unit, and area coverage accounts for the half of focusing photosensitive unit, one
Individual second lenticule covers a double-core focusing photosensitive pixel, by the poor information of the first phase for reading photosensitive unit of focusing and double
The poor information of second phase of the burnt photosensitive pixel of verification, and focusing control is carried out according to the poor information of first phase and the poor information of second phase
System, by increasing capacitance it is possible to increase the thang-kng amount of focusing pixel, effectively lifts the focusing speed under low luminous environment, while improving the standard of color rendition
True property.
To achieve these goals, fourth aspect present invention embodiment also proposed a kind of mobile terminal, the mobile terminal
Including housing, processor, memory, circuit board and power circuit, wherein, the circuit board is placed in the sky that the housing is surrounded
Between it is internal, the processor and the memory are arranged on the circuit board；The power circuit, for for it is described it is mobile eventually
Each circuit or device at end are powered；The memory is used to store executable program code；The processor is by reading
State the executable program code that stores in memory to run program corresponding with the executable program code, for performing
The focusing control method for the double-core focus image sensor that above-mentioned first aspect embodiment is proposed.
The mobile terminal of the embodiment of the present invention, a square white filter unit, one are covered based on first lenticule
Individual white filter unit covers the center section of a focusing photosensitive unit, and area coverage accounts for the half of focusing photosensitive unit, one
Individual second lenticule covers a double-core focusing photosensitive pixel, by the poor information of the first phase for reading photosensitive unit of focusing and double
The poor information of second phase of the burnt photosensitive pixel of verification, and focusing control is carried out according to the poor information of first phase and the poor information of second phase
System, by increasing capacitance it is possible to increase the thang-kng amount of focusing pixel, effectively lifts the focusing speed under low luminous environment, while improving the standard of color rendition
True property.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and be readily appreciated that, wherein：
Fig. 1 is traditional double-core focus image sensor construction schematic diagram；
Fig. 2 is the profile of double-core focus image sensor according to an embodiment of the invention；
Fig. 3 is the top view of double-core focus image sensor according to an embodiment of the invention；
Fig. 4 is the first lenticule arrangement density profile；
Fig. 5 is the flow chart of the focusing control method of double-core focus image sensor according to an embodiment of the invention；
Fig. 6 be it is according to an embodiment of the invention focusing photosensitive unit in 2*2 photosensitive pixel covered by white filter unit
The division effect diagram of cover；
Fig. 7 is the flow chart of the focusing control method of double-core focus image sensor according to another embodiment of the present invention；
Fig. 8 is the schematic diagram that focusing photosensitive unit pixel value is obtained using interpolation algorithm；
Fig. 9 is the structural representation of imaging device according to an embodiment of the invention；
Figure 10 is the structural representation of mobile terminal according to an embodiment of the invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Below with reference to the accompanying drawings describe the embodiment of the present invention double-core focus image sensor and its focusing control method and into
As device.
Double-core both full-pixel focusing technology is state-of-the-art focusing technology, the double-core that the focusing technology is used in the market
Sensor construction focus as shown in figure 1, corresponding to two photodiodes under each lenticule (circle represents lenticule in Fig. 1).
When carrying out imaging, the value of " 1 " with " 2 " is added acquisition single component pixels value.When carrying out focusing process, " 1 " is read respectively
The value of " 2 ", the drive volume and driving direction of camera lens can be calculated by the phase difference calculated between the two.
, it is understood that with the increase of sum of all pixels, " 1 " and " 2 " corresponding photosensitive area diminishes, and subtracts throughput
It is few, cause the phase information under low luminous environment easily to be flooded by noise, focusing is difficult.
Therefore, in order to solve existing double-core both full-pixel focusing technology focused under low luminous environment difficulty the problem of, the present invention
Propose a kind of focusing control method of double-core focus image sensor, by increasing capacitance it is possible to increase the thang-kng amount of focusing pixel, effectively lifting
Focusing speed under low luminous environment.
Double-core pair needed for focusing control method first to realizing double-core focus image sensor proposed by the present invention below
Burnt imaging sensor is introduced.
Fig. 2 is the profile of double-core focus image sensor according to an embodiment of the invention, and Fig. 3 is according to this hair
The top view of the double-core focus image sensor of bright one embodiment.
As shown in Figures 2 and 3, the double-core focus image sensor 100 includes photosensitive unit array 10, filter unit array
20 and microlens array 30.
Wherein, filter unit array 20 is arranged on photosensitive unit array 10, and microlens array 30 is located at filter unit battle array
On row 20.Microlens array 30 includes the first lenticule 31 and the second lenticule 32.One the first lenticule 31 covers one
White filter unit 21, a white filter unit 21 covers a focusing photosensitive unit 11, and white filter unit 21 is by N*N
Adjacent right angled triangle composition, the area of a white filter unit 21 is the half of a focusing photosensitive unit 11, one
Second lenticule 32 covers a filter unit 22, and a filter unit 22 covers a double-core focusing photosensitive pixel 12.
In an embodiment of the present invention, double-core focusing photosensitive pixel 12 is arranged as Bayer array (Bayer pattern).
Picture signal can be handled to the algorithm of Bayer structure using conventional needle using Bayer structure, without being done on hardware configuration
Big adjustment.Double-core focusing photosensitive pixel 12 has two photodiodes, respectively the first photodiode 121 and the second light
Electric diode 122, corresponds respectively to " 1 " and " 2 " of each double-core focusing photosensitive pixel 12 in Fig. 3.
In an embodiment of the present invention, focusing photosensitive unit 11 includes N*N photosensitive pixel 110, white filter unit 21
The lower right half of upper left side photosensitive pixel, the upper right half of lower left side photosensitive pixel in covering focusing photosensitive unit 11,
The lower left half of upper right side photosensitive pixel, and lower right side photosensitive pixel upper left half part.In double-core pair as shown in Figure 3
In burnt image sensor architecture, focusing photosensitive unit 11 (part in dotted line in figure) includes 2*2 photosensitive pixel 110, and one white
W covers the lower right half of the upper left side photosensitive pixel in a focusing photosensitive unit 11, lower-left in color filter unit 21 i.e. figure
Upper right half, the lower left half of upper right side photosensitive pixel of side photosensitive pixel, and lower right side photosensitive pixel upper left half
Part, the area of white filter unit 21 is the half of focusing photosensitive unit 11, and the remainder of focusing photosensitive unit 11 is Fig. 3
Middle a, b, c and d region is common filter unit, is covered by semicircle optical filter, the part is provided corresponding rgb pixel
Value, interpolation during for follow-up imaging, which is reduced, to be calculated, and improves the accuracy of color rendition.
Put it briefly, in the double-core focus image sensor 100 of the embodiment of the present invention, the N*N composition of photosensitive pixel 110 one
Group simultaneously shares first lenticule 31, the white covering of filter unit 21 focusing photosensitive unit 11, and a white filter unit
21 area is the half of a focusing photosensitive unit 11.
In one embodiment of the invention, microlens array 30 includes horizontal center line and vertical center line, and first is micro-
Lens 31 are multiple.Multiple first lenticules 31 include being arranged on first group of first lenticule 31 of horizontal center line and are arranged on
Second group of first lenticule 31 of vertical center line.
In one embodiment of the invention, microlens array 30 can also include four sidelines, and now, multiple first is micro-
Lens 31 also include the 3rd group of first lenticule 31 for being arranged on four sidelines.
When microlens array 30 includes horizontal center line, vertical center line and four sidelines, first group of first lenticule
31 and the lens density of second group of first lenticule 31 be more than the lens density of the 3rd group of first lenticule 31.
In order to make it easy to understand, illustrating the arrangement mode of the first lenticule 31 in microlens array 30 below in conjunction with the accompanying drawings.Fig. 4
It is the first lenticule arrangement density profile.As shown in figure 4, the white filter unit 21 covered by the first lenticule 31, that is, scheme
Middle W, scattered distribution, accounts for the 3%~5% of total number of pixels in whole double-core focus image sensor, in microlens array 30
Horizontal center line and vertical center line on W distribution it is more dense, on four sidelines W distribution it is more sparse, pay the utmost attention to picture
The focusing accuracy and speed of intermediate region, in the case where not influenceing image quality, effectively lift focusing speed.
It should be noted that the W in Fig. 3 and Fig. 4 represents the first lenticule 31 covering in double-core focus image sensor
Filter unit is white filter unit 21, and bigger thang-kng amount is resulted in during using white filter unit 21.First lenticule
The filter unit of 31 coverings can also be that the W in green filter unit, i.e. Fig. 3 and Fig. 4 could alternatively be G, using green filter
During unit, available information during imaging is more.It should be appreciated that in the embodiment of the present invention only using white filter unit as
Example is illustrated, and cannot function as limitation of the present invention.
Based on the structure of double-core focus image sensor in Fig. 2-Fig. 4, the double-core focusing to the embodiment of the present invention below is schemed
As the focusing control method of sensor is illustrated.Fig. 5 is double-core focus image sensor according to an embodiment of the invention
The flow chart for control method of focusing, as shown in figure 5, this method comprises the following steps：
S51, control photosensitive unit array enters focal modes.
When being taken pictures using camera, if feeling, the image definition of display is not enough, at this point it is possible to control photosensitive unit
Array enters focal modes, to improve the definition of photo by focusing.
S52, reads the poor information of first phase of focusing photosensitive unit and the second phase difference letter of double-core focusing photosensitive pixel
Breath.
In an embodiment of the present invention, after focal modes are entered, the of focusing photosensitive unit can further be read
The poor information of second phase of one phase information and double-core focusing photosensitive pixel.
Alternatively, in one embodiment of the invention, the poor information of first phase of focusing photosensitive unit is read, can be wrapped
Include：Read focusing photosensitive unit in a part of photosensitive pixel output valve and be used as the first output valve；Read focusing photosensitive unit
The output valve of middle another part photosensitive pixel is simultaneously used as the second output valve；First is obtained according to the first output valve and the second output valve
Phase information.
It should be noted that in an embodiment of the present invention, reading the poor information of first phase of focusing photosensitive unit, specifically
Refer to that the first phase for reading the part focusing photosensitive unit covered in focusing photosensitive unit by white filter unit is poor
Information.
With reference to Fig. 3 and Fig. 6, to focus, photosensitive unit is focused including 2*2 photosensitive pixel, white filter unit covering
The lower right half of upper left side photosensitive pixel in photosensitive unit, the upper right half of lower left side photosensitive pixel, upper right side is photosensitive
It is explained exemplified by the lower left half of pixel, the upper left half part of lower right side photosensitive pixel.Quilt in focusing photosensitive unit
The region (white portion in Fig. 3, represented with W) of white filter unit covering can be divided from different angles, such as Fig. 6
Shown, 3 width figures shown in Fig. 6 are the division carried out to W from left and right sides, upper and lower sides and diagonal line side respectively, illustrate as
Under：
Example one, is divided to W from left and right sides.
In this example, W is divided to for two parts of left and right sides, the output valve of a part of photosensitive pixel in photosensitive unit of focusing
Can be the output valve of two " 1 " on the left of W, and as the first output valve, then the output valve of two on the right side of W " 2 " is used as
Two output valves.
Example two, is divided to W from upper and lower sides.
In this example, W is divided to for two parts of upper and lower sides, the output valve of a part of photosensitive pixel in photosensitive unit of focusing
Can be the output valve of two " 1 " on the upside of W, and as the first output valve, then the output valve of two on the downside of W " 2 " is used as
Two output valves.
Example three, is divided to W from diagonal line side.
In this example, W is divided into two parts according to two diagonal, i.e., by two " 1 " in the upper left corner in W and the lower right corner
Output valve is used as the second output valve as the first output valve, the then output valve of two " 2 " in the lower left corner and the upper right corner.
In an embodiment of the present invention, after it have read the first output valve and the second output valve, you can defeated according to first
Go out value and the second output valve obtains the poor information of first phase.
For example, to read the output valve of two " 1 " on the left of W as the output of two " 2 " on the right side of the first output valve, W
Exemplified by value is as the second output valve, the output valve of two, left side " 1 " can be first calculated and as first phase information, then calculate
Two " 2 " on right side output valve and as second phase information, eventually through calculating first phase information and second phase
Difference between information is used as the poor information of first phase.
In an embodiment of the present invention, will focusing photosensitive unit in by the left and right sides of white filter unit covering part
Output valve can detect the poor information of first phase of left and right directions respectively as the first output valve and the second output valve；Will focusing
It is defeated respectively as the first output valve and second by the output valve of the both sides up and down of white filter unit covering part in photosensitive unit
Go out value, the poor information of first phase of above-below direction can be detected；Will focusing photosensitive unit in by white filter unit covering part
Output valve on two diagonal can detect oblique first phase difference letter respectively as the first output valve and the second output valve
Breath.
Alternatively, in one embodiment of the invention, the poor information of second phase of double-core focusing photosensitive pixel is read, can
With including：The output valve of the first photodiode is read, the 3rd output valve is used as；The output valve of the second photodiode is read,
It is used as the 4th output valve；The poor information of second phase is obtained according to the 3rd output valve and the 4th output valve.
Still by taking Fig. 3 as an example, in Fig. 3, the calculation of the poor information of second phase of all double-core focusing photosensitive pixels is identical,
Only it is illustrated herein exemplified by calculating the poor information of the second phase in Fig. 3 at Gr.The output valve conduct of " 1 " at Gr is read first
3rd output valve, then the output valve for reading at Gr " 2 " are obtained as the 4th output valve according to the 3rd output valve and the 4th output valve
Second phase difference information, such as, can be used as second phase by calculating the difference between the 3rd output valve and the 4th output valve
Poor information.
S53, focusing control is carried out according to the poor information of first phase and the poor information of second phase.
In an embodiment of the present invention, it is photosensitive in the poor information of first phase that have read focusing photosensitive unit and double-core focusing
After the poor information of the second phase of unit, you can carry out focusing control according to the poor information of first phase and the poor information of second phase.
It is typically the output according to two photodiodes in double-core focusing photosensitive pixel in related double-core focusing technology
Value calculates phase difference, thus calculates the drive volume and driving direction of camera lens, and then realize focusing.Under low luminous environment, focusing
Speed is slower.
And in an embodiment of the present invention, a white filter unit being covered based on the first lenticule, a white filters
Unit covers a focusing photosensitive unit, by using white filter unit, remains to obtain bigger thang-kng amount under low luminous environment
The poor information of first phase supply focusing process, and then lift the focusing speed under low luminous environment.
The focusing control method of the double-core focus image sensor of the embodiment of the present invention, based on the first lenticule covering
One square white filter unit, a white filter unit covers the center section of a focusing photosensitive unit, area coverage
The half of focusing photosensitive unit is accounted for, second lenticule covers a double-core focusing photosensitive pixel, photosensitive by reading focusing
The poor information of second phase of the poor information of the first phase of unit and double-core focusing photosensitive pixel, and according to the poor information of first phase and
Second phase difference information carries out focusing control, by increasing capacitance it is possible to increase the thang-kng amount of focusing pixel, effectively lifts the focusing under low luminous environment
Speed, while improving the accuracy of color rendition.
It should be appreciated that the purpose of focusing is to obtain the photo that definition is higher.In actual applications, complete
After focusing process, generally also include further imaging process, so that, as shown in fig. 7, on the basis of shown in above-mentioned Fig. 5,
Also include after step S53：
S71, control photosensitive unit array enters imaging pattern.
In an embodiment of the present invention, after focusing control is completed, further control photosensitive unit array enters imaging
Pattern.
S72, control photosensitive unit array is exposed, and reads the output valve of photosensitive unit array, to obtain photosensitive list
The pixel value of element array is so as to generate image.
Wherein, the pixel value for the part that focusing photosensitive unit is covered by white filter unit is obtained by interpolation retrieving algorithm
.
In an embodiment of the present invention, after photosensitive unit array enters imaging pattern, control photosensitive unit array enters
Row exposure, and the output valve of photosensitive unit array is read, and then obtain the pixel value generation image of photosensitive unit array.
In one embodiment of the invention, read the output valve of photosensitive unit array and then obtain photosensitive unit array
Pixel value, can include：Read in double-core focusing photosensitive pixel after the output valve of two photodiodes, by two poles of photoelectricity two
The output valve of pipe is added the pixel value for obtaining double-core focusing photosensitive pixel；For focusing photosensitive unit in by white filter unit
The part of covering, the pixel value of the part is obtained using interpolation retrieving algorithm, wherein, interpolation retrieving algorithm can be that arest neighbors is inserted
Any one in value-based algorithm, bilinear interpolation algorithm and cube sum algorithm.
For the sake of simplicity, the pixel value of focusing photosensitive unit can be obtained using arest neighbors interpolation algorithm, that is, select from this pair
The gray value of the input pixel of the position that burnt photosensitive unit is be mapped to recently is as interpolation result, that is, the photosensitive list of the focusing
The pixel value of member.
Fig. 8 is the schematic diagram that focusing photosensitive unit pixel value is obtained using interpolation algorithm.
As shown in figure 8, in the focusing photosensitive unit comprising 2*2 photosensitive pixel, white filter unit (white area in figure
Domain) cover the lower right half of one photosensitive pixel in upper left side in focusing photosensitive unit, one photosensitive pixel of lower left side
The lower left half of upper right half, one photosensitive pixel in upper right side, and the photosensitive pixel of lower right side one upper left half part.
In order to export the preferable image of image quality, it is necessary to which the output valve to covered portionss in each photosensitive pixel enters row interpolation also
Original, that is, need to calculate the rgb value for obtaining covered portionss in each photosensitive pixel.The pixel average of neighborhood territory pixel can be made
For the pixel value of covered portionss in the photosensitive pixel.To calculate in white filter unit exemplified by the rgb value at the upper left corner " 1 " place,
For convenience of description, the R pixel values at the upper left corner " 1 " place are designated as R10, G pixel values are designated as G10, B pixel values are designated as B10, calculation formula
It is as follows respectively：
R10=Ra
It should be noted that in white filter unit the lower left corner " 1 " place, the upper right corner " 2 " place and the lower right corner " 2 " place RGB
The interpolation restoring method of value similarly, is taken from adjacent pixel and enters row interpolation with the rgb value restoring method at the upper left corner " 1 " place
Reduction, it is unnecessary to avoid, no longer illustrate one by one herein.
It should be noted that the above-mentioned description to obtaining the algorithm for photosensitive unit pixel value of focusing is only used for illustrating this
Invention, and cannot function as limitation of the present invention.During actual treatment, to obtain more accurate pixel value, adjacent several pixels
Pixel value may be used to interpolation reduction, be not limited solely to the pixel value of adjacent pixel, wherein, the pixel value distribution for adjusting the distance near
Higher weight, the pixel value for adjusting the distance remote distributes relatively low weight, i.e. pixel value weight shared in interpolation retrieving algorithm
It is inversely proportional with the distance that is reduced pixel.
In an embodiment of the present invention, by after the pixel value reduction for photosensitive unit of focusing, you can according to photosensitive unit array
In each pixel pixel value generation image.
The focusing control method of the double-core focus image sensor of the embodiment of the present invention, the Perceived control after focusing control is completed
Light unit array enters imaging pattern, and controls photosensitive unit array to be exposed, by the output for reading photosensitive unit array
Value is to obtain the pixel value of photosensitive unit array so as to generating image, it is possible to increase image quality.
In order to realize above-described embodiment, the invention also provides a kind of double-core focus image sensor, Fig. 2 is according to this hair
The profile of the double-core focus image sensor of bright one embodiment, Fig. 3 is double-core according to an embodiment of the invention
The top view of focus image sensor.
Scheme it should be noted that being focused in the focusing control method embodiment of foregoing double-core focus image sensor to double-core
As the relevant explanation of sensor illustrates the double-core focus image sensor that is also applied for the embodiment of the present invention, its realization principle class
Seemingly, here is omitted.
The double-core focus image sensor of the embodiment of the present invention, includes the first lenticule and the second lenticule by setting
Microlens array, first lenticule covers a square white filter unit, and a white filter unit covering one is right
The center section of burnt photosensitive unit, area coverage accounts for the half of focusing photosensitive unit, and second lenticule covers a double-core
Focusing photosensitive pixel, by increasing capacitance it is possible to increase the thang-kng amount of focusing pixel, to lift the focusing speed under low luminous environment and improving color also
Former accuracy provides hardware foundation.
In order to realize above-described embodiment, the invention also provides a kind of imaging device, Fig. 9 is according to one embodiment of the invention
Imaging device structural representation.
As shown in figure 9, the imaging device 900 includes the double-core focus image sensor 100 and control mould of above-described embodiment
Block 910.Wherein,
The control photosensitive unit array of control module 910 enters focal modes, and the first phase for reading focusing photosensitive unit is poor
The poor information of second phase of information and double-core focusing photosensitive pixel, is carried out according to the poor information of first phase and the poor information of second phase
Focusing control.
Alternatively, in one embodiment of the invention, control module 910 is used to read a part in focusing photosensitive unit
The output valve of photosensitive pixel and as the first output valve, reads the output valve of another part photosensitive pixel in focusing photosensitive unit simultaneously
As the second output valve, the poor information of first phase is obtained according to the first output valve and the second output valve.
It should be noted that in an embodiment of the present invention, reading the poor information of first phase of focusing photosensitive unit, specifically
Refer to that the first phase for reading the part focusing photosensitive unit covered in focusing photosensitive unit by white filter unit is poor
Information.
In an embodiment of the present invention, the double-core focusing photosensitive pixel in double-core focus image sensor 100 has two
Photodiode, respectively the first photodiode and the second photodiode.Therefore, control module 910 is additionally operable to reading
The output valve of one photodiode, as the 3rd output valve, reads the output valve of the second photodiode, is used as the 4th output
Value, the poor information of second phase is obtained according to the 3rd output valve and the 4th output valve.
It should be appreciated that the purpose of focusing is to obtain the photo that definition is higher.In actual applications, complete
After focusing process, generally also include further imaging process, therefore, in one embodiment of the invention, control module
910, which are additionally operable to control photosensitive unit array, enters imaging pattern, and control photosensitive unit array is exposed, and reads photosensitive unit
The output valve of array, to obtain the pixel value of photosensitive unit array so as to generate image, wherein, focusing photosensitive unit is filtered by white
The pixel value of the part of light unit covering is obtained by interpolation retrieving algorithm.
The imaging device of the embodiment of the present invention, a square white filter unit, one are covered based on first lenticule
Individual white filter unit covers the center section of a focusing photosensitive unit, and area coverage accounts for the half of focusing photosensitive unit, one
Individual second lenticule covers a double-core focusing photosensitive pixel, by the poor information of the first phase for reading photosensitive unit of focusing and double
The poor information of second phase of the burnt photosensitive pixel of verification, and focusing control is carried out according to the poor information of first phase and the poor information of second phase
System, by increasing capacitance it is possible to increase the thang-kng amount of focusing pixel, effectively lifts the focusing speed under low luminous environment, while improving the standard of color rendition
True property.
In order to realize above-described embodiment, the invention also provides a kind of mobile terminal, Figure 10 is according to an implementation of the invention
The structural representation of the mobile terminal of example.
As shown in Figure 10, the mobile terminal 1 000 includes housing 1001, processor 1002, memory 1003, circuit board
1004 and power circuit 1005, wherein, circuit board 1004 is placed in the interior volume that housing 1001 is surrounded, and processor 1002 and deposits
Reservoir 1003 is arranged on circuit board 1004；Power circuit 1005, for being powered for each circuit or device of mobile terminal；Deposit
Reservoir 1003 is used to store executable program code；Processor 1002 is by reading the executable program stored in memory 1003
Code runs program corresponding with executable program code, for performing the double-core focus image sensing in above-described embodiment
The focusing control method of device.
The mobile terminal of the embodiment of the present invention, a square white filter unit, one are covered based on first lenticule
Individual white filter unit covers the center section of a focusing photosensitive unit, and area coverage accounts for the half of focusing photosensitive unit, one
Individual second lenticule covers a double-core focusing photosensitive pixel, by the poor information of the first phase for reading photosensitive unit of focusing and double
The poor information of second phase of the burnt photosensitive pixel of verification, and focusing control is carried out according to the poor information of first phase and the poor information of second phase
System, by increasing capacitance it is possible to increase the thang-kng amount of focusing pixel, effectively lifts the focusing speed under low luminous environment, while improving the standard of color rendition
True property.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those
Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in process, method, article or equipment including the key element.
Represent in flow charts or logic and/or step described otherwise above herein, for example, being considered use
In the order list for the executable instruction for realizing logic function, it may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system including the system of processor or other can be held from instruction
The system of row system, device or equipment instruction fetch and execute instruction) use, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass
Defeated program is for instruction execution system, device or equipment or the dress for combining these instruction execution systems, device or equipment and using
Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following：Electricity with one or more wirings
Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, can even is that can be in the paper of printing described program thereon or other are suitable for computer-readable medium
Medium, because can then enter edlin, interpretation or if necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, the software that multiple steps or method can in memory and by suitable instruction execution system be performed with storage
Or firmware is realized.If, and in another embodiment, can be with well known in the art for example, realized with hardware
Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal
Discrete logic, the application specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
It should be noted that in the description of this specification, reference term " one embodiment ", " some embodiments ", " show
The description of example ", " specific example " or " some examples " etc. mean to combine the specific features of the embodiment or example description, structure,
Material or feature are contained at least one embodiment of the present invention or example.In this manual, above-mentioned term is shown
The statement of meaning property is necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can in an appropriate manner be combined in any one or more embodiments or example.In addition, in the case of not conflicting,
Those skilled in the art can be by the not be the same as Example or example and non-be the same as Example described in this specification or example
Feature is combined and combined.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (19)
1. a kind of focusing control method of double-core focus image sensor, it is characterised in that the double-core focus image sensor
Including：Photosensitive unit array, the filter unit array being arranged on the photosensitive unit array and positioned at the filter unit battle array
Microlens array on row, wherein, the microlens array includes the first lenticule and the second lenticule, one described first
Lenticule covers a white filter unit, and a white filter unit covers a focusing photosensitive unit, the white
Filter unit is made up of N*N adjacent right angled triangles, and the area of a white filter unit is a focusing
The half of photosensitive unit, second lenticule covers a double-core focusing photosensitive pixel, the described method comprises the following steps：
The photosensitive unit array is controlled to enter focal modes；
Read the poor information of first phase of the focusing photosensitive unit and the second phase difference letter of double-core focusing photosensitive pixel
Breath；
Focusing control is carried out according to the poor information of the first phase and the poor information of the second phase.
2. the method as described in claim 1, it is characterised in that read the poor information of first phase of the focusing photosensitive unit,
Including：
Read it is described focusing photosensitive unit in a part of photosensitive pixel output valve and be used as the first output valve；
Read it is described focusing photosensitive unit in another part photosensitive pixel output valve and be used as the second output valve；
The poor information of the first phase is obtained according to first output valve and the second output valve.
3. the method as described in claim 1, it is characterised in that the double-core focusing photosensitive pixel has two poles of photoelectricity two
Pipe, the first photodiode and the second photodiode, read the poor information of second phase of the double-core focusing photosensitive pixel, bag
Include：
The output valve of first photodiode is read, the 3rd output valve is used as；
The output valve of second photodiode is read, the 4th output valve is used as；
The poor information of the second phase is obtained according to the 3rd output valve and the 4th output valve.
4. the method as described in claim 1, it is characterised in that the double-core focusing photosensitive pixel is arranged as Bayer array.
5. the method as described in claim 1, it is characterised in that the microlens array includes horizontal center line and vertical center
Line, first lenticule is multiple, and the multiple first lenticule includes：
It is arranged on first group of first lenticule of the horizontal center line；With
It is arranged on second group of first lenticule of the vertical center line.
6. method as claimed in claim 5, it is characterised in that the microlens array includes four sidelines, the multiple the
One lenticule also includes：
It is arranged on the 3rd group of first lenticule in four sidelines.
7. method as claimed in claim 6, it is characterised in that first group of first lenticule and it is described second group first it is micro-
The lens density of lens is more than the lens density of the 3rd group of first lenticule.
8. the method as described in claim 1, it is characterised in that the focusing photosensitive unit includes N*N photosensitive pixel, described
The lower right half of upper left side photosensitive pixel in the white filter unit covering focusing photosensitive unit, lower left side photosensitive pixel
Upper right half, the lower left half of upper right side photosensitive pixel, the upper left half part of lower right side photosensitive pixel, methods described is also
Including：
The photosensitive unit array is controlled to enter imaging pattern；
Control the photosensitive unit array to be exposed, and read the output valve of the photosensitive unit array, to obtain the sense
The pixel value of light unit array so as to generate image, wherein, the focusing photosensitive unit is by the white filter unit covering
Partial pixel value is obtained by interpolation retrieving algorithm.
9. a kind of double-core focus image sensor, it is characterised in that including：
Photosensitive unit array；
It is arranged on the filter unit array on the photosensitive unit array；
Microlens array on the filter unit array；
Wherein, the microlens array includes the first lenticule and the second lenticule, and first lenticule covers one
White filter unit, a white filter unit covers a focusing photosensitive unit, and the white filter unit is by N*N
Adjacent right angled triangle composition, the area of a white filter unit is the half of a focusing photosensitive unit,
One the second lenticule covers a double-core focusing photosensitive pixel.
10. double-core focus image sensor as claimed in claim 9, it is characterised in that the double-core focusing photosensitive pixel row
It is classified as Bayer array.
11. double-core focus image sensor as claimed in claim 9, it is characterised in that the microlens array includes level
Center line and vertical center line, first lenticule are multiple, and the multiple first lenticule includes：
It is arranged on first group of first lenticule of the horizontal center line；With
It is arranged on second group of first lenticule of the vertical center line.
12. double-core focus image sensor as claimed in claim 11, it is characterised in that the microlens array includes four
Sideline, the multiple first lenticule also includes：
It is arranged on the 3rd group of first lenticule in four sidelines.
13. double-core focus image sensor as claimed in claim 12, it is characterised in that first group of first lenticule and
The lens density of second group of first lenticule is more than the lens density of the 3rd group of first lenticule.
14. double-core focus image sensor as claimed in claim 9, it is characterised in that the focusing photosensitive unit includes N*N
The bottom right half portion of upper left side photosensitive pixel in individual photosensitive pixel, the white filter unit covering focusing photosensitive unit
Point, the upper right half of lower left side photosensitive pixel, the lower left half of upper right side photosensitive pixel, the upper left of lower right side photosensitive pixel
Half part.
15. a kind of imaging device, it is characterised in that including：
Double-core focus image sensor as described in claim any one of 9-14；With
Control module, the control module controls the photosensitive unit array to enter focal modes；
Read the poor information of first phase of the focusing photosensitive unit and the second phase difference letter of double-core focusing photosensitive pixel
Breath；
Focusing control is carried out according to the poor information of the first phase and the poor information of the second phase.
16. imaging device as claimed in claim 15, it is characterised in that the control module specifically for：
Read it is described focusing photosensitive unit in a part of photosensitive pixel output valve and be used as the first output valve；
Read it is described focusing photosensitive unit in another part photosensitive pixel output valve and be used as the second output valve；
The poor information of the first phase is obtained according to first output valve and the second output valve.
17. imaging device as claimed in claim 15, it is characterised in that the double-core focusing photosensitive pixel has two photoelectricity
Diode, the first photodiode and the second photodiode, the control module specifically for：
The output valve of first photodiode is read, the 3rd output valve is used as；
The output valve of second photodiode is read, the 4th output valve is used as；
The poor information of the second phase is obtained according to the 3rd output valve and the 4th output valve.
18. imaging device as claimed in claim 15, it is characterised in that the control module is additionally operable to：
The photosensitive unit array is controlled to enter imaging pattern；
Control the photosensitive unit array to be exposed, and read the output valve of the photosensitive unit array, to obtain the sense
The pixel value of light unit array so as to generate image, wherein, the focusing photosensitive unit is by the white filter unit covering
Partial pixel value is obtained by interpolation retrieving algorithm.
19. a kind of mobile terminal, including housing, processor, memory, circuit board and power circuit, wherein, the circuit board peace
The interior volume surrounded in the housing is put, the processor and the memory are arranged on the circuit board；The power supply
Circuit, for being powered for each circuit or device of the mobile terminal；The memory is used to store executable program code；
The processor is run and the executable program code by reading the executable program code stored in the memory
Corresponding program, for performing the focusing control of the double-core focus image sensor as any one of claim 1 to 8
Method.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109922270A (en) * | 2019-04-17 | 2019-06-21 | 德淮半导体有限公司 | Phase focus image sensor chip |
| CN111586323A (en) * | 2020-05-07 | 2020-08-25 | Oppo广东移动通信有限公司 | Image sensor, control method, camera assembly and mobile terminal |
| US11743605B2 (en) | 2018-07-19 | 2023-08-29 | Vivo Mobile Communication Co., Ltd. | Image sensor, mobile terminal, and image photographing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241310A (en) * | 2014-09-23 | 2014-12-24 | 上海集成电路研发中心有限公司 | CMOS image pixel array with two-lenticule layer |
| CN106358026A (en) * | 2015-07-15 | 2017-01-25 | 三星电子株式会社 | Image sensor including auto-focusing pixel and image processing system including the same |
| US20170094210A1 (en) * | 2015-09-24 | 2017-03-30 | Qualcomm Incorporated | Mask-less phase detection autofocus |
-
2017
- 2017-04-28 CN CN201710296855.7A patent/CN107124536B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241310A (en) * | 2014-09-23 | 2014-12-24 | 上海集成电路研发中心有限公司 | CMOS image pixel array with two-lenticule layer |
| CN106358026A (en) * | 2015-07-15 | 2017-01-25 | 三星电子株式会社 | Image sensor including auto-focusing pixel and image processing system including the same |
| US20170094210A1 (en) * | 2015-09-24 | 2017-03-30 | Qualcomm Incorporated | Mask-less phase detection autofocus |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11743605B2 (en) | 2018-07-19 | 2023-08-29 | Vivo Mobile Communication Co., Ltd. | Image sensor, mobile terminal, and image photographing method |
| US11962918B2 (en) | 2018-07-19 | 2024-04-16 | Vivo Mobile Communication Co., Ltd. | Image sensor, mobile terminal, and image photographing method |
| CN109922270A (en) * | 2019-04-17 | 2019-06-21 | 德淮半导体有限公司 | Phase focus image sensor chip |
| CN111586323A (en) * | 2020-05-07 | 2020-08-25 | Oppo广东移动通信有限公司 | Image sensor, control method, camera assembly and mobile terminal |
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|---|---|
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