JP2017152658A - Imaging device and imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use incident light efficiently.SOLUTION: The imaging device includes: a first imaging device having a first pixel which receives light incident through an optical system having a focusing optical system and outputs a signal; and a second imaging device having a second pixel which receives the light transmitted through the first imaging device and outputs a signal and has an area larger than the area of the first pixel and a third pixel which receives the light transmitted through the first imaging device and outputs a signal and which has an area different from the area of the second pixel.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an imaging element and an imaging apparatus.

  An imaging apparatus including an imaging element in which two types of pixels having different sizes are arranged in a two-dimensional manner is known (Patent Document 1). This imaging device has a small-sized imaging pixel and a large-sized focus detection pixel.

JP2011-209317A

  It has been difficult for a conventional imaging device to control imaging or exposure by efficiently using incident light.

The imaging device according to claim 1, a first imaging device having a first pixel that receives light incident through an optical system having a focus adjustment optical system and outputs a signal, and transmits the first imaging device. The light received is output and a signal is output, the second pixel having an area larger than the area of the first pixel, the light transmitted through the first image sensor is received and a signal is output, and the second pixel A second imaging device having a third pixel having an area different from the area.
The image pickup device according to claim 4 includes a first image pickup device having a first pixel having a first photoelectric conversion unit that photoelectrically converts light incident through an optical system having a focus adjustment optical system and outputs a signal. A second pixel having a second photoelectric conversion unit that has a light reception area larger than a light reception area of the first photoelectric conversion unit and photoelectrically converts light transmitted through the first image sensor and outputs a signal; and A second imaging element having a third pixel having a third photoelectric conversion unit that receives light transmitted through the imaging element and outputs a signal.
An imaging device according to a tenth aspect of the present invention is based on the image pickup device according to any one of the first to ninth aspects and a signal output from the second pixel based on a signal output from the second pixel. A focus detection unit that detects a shift between the imaging plane formed by the optical system and the image sensor, and a photometry unit that performs photometry based on a signal output from the third pixel.
An imaging apparatus according to an eleventh aspect is based on the imaging element according to any one of the first aspect to the ninth aspect, and light incident through the optical system based on a signal output from the second pixel. A focus detection unit that detects a position of the focus adjustment optical system when forming an image on the image sensor; and a photometry unit that performs photometry based on a signal output from the third pixel.

It is a figure which illustrates the structure of the digital camera by one embodiment. It is a figure which shows the outline | summary of the 1st and 2nd image sensor part. (A) is a figure which shows arrangement | positioning of the imaging pixel of 8 rows x 8 columns which is a part of 1st image sensor part, (b) is a part of 2nd image sensor part. It is a figure which shows arrangement | positioning of the pixel for a focus detection of row x4 column. It is sectional drawing which shows the structure for two pixels of an imaging pixel, and one pixel of a focus detection pixel about the 1st and 2nd imaging device part. It is a figure which shows a 1st modification, (a) is a figure which shows arrangement | positioning of the pixel for an imaging of 8 rows x 8 columns which is a part of 1st image sensor part, (b) FIG. 4 is a diagram illustrating an arrangement of 4 × 4 column focus detection pixels which are a part of two image sensor units. Sectional drawing which shows the structure for 2 pixels of the pixel of a 1st image pick-up element part, and 1 pixel of the pixel of a 2nd image pick-up element part about the 1st and 2nd image pick-up element part based on a 1st modification. It is. It is a figure which shows the other example of a 1st modification, (a) is a figure which shows arrangement | positioning of the imaging pixel of 8 rows x 8 columns which is a part of 1st image sensor part, (b) () Is a diagram showing an arrangement of 4 rows × 4 columns of focus detection pixels which are part of the second image sensor section. It is a figure which shows the other example of a 1st modification, (a) is a figure which shows arrangement | positioning of the imaging pixel of 8 rows x 8 columns which is a part of 1st image sensor part, (b) () Is a diagram showing an arrangement of 4 rows × 4 columns of focus detection pixels which are part of the second image sensor section. It is a figure which shows a 2nd modification, (a) is a figure which shows arrangement | positioning of the pixel for an imaging of 8 rows x 8 columns which is a part of 1st image sensor part, (b) FIG. 4 is a diagram illustrating an arrangement of 4 × 4 column focus detection pixels which are a part of two image sensor units. Sectional drawing which shows the structure for 2 pixels of the pixel of a 1st image pick-up element part, and 1 pixel of the pixel of a 2nd image pick-up element part about the 1st and 2nd image pick-up element part based on a 2nd modification. It is. It is a figure which shows the 3rd modification. It is a figure which shows a 4th modification, (a) is a figure which shows arrangement | positioning of the pixel for an imaging of 8 rows x 8 columns which is a part of 1st image sensor part, (b) FIG. 3 is a diagram illustrating an arrangement of focus detection pixels corresponding to an arrangement of imaging pixels of 8 rows × 8 columns, which is a part of the second imaging element unit and is a part of the first imaging element unit. It is a figure which shows a 5th modification, (a) is a figure which shows arrangement | positioning of the imaging pixel of 8 rows x 8 columns which is a part of 1st image sensor part, (b) FIG. 3 is a diagram illustrating an arrangement of focus detection pixels corresponding to an arrangement of imaging pixels of 8 rows × 8 columns, which is a part of the second imaging element unit and is a part of the first imaging element unit. It is the figure which showed the pixel for imaging and the pixel for focus detection which overlapped on the 5th modification. It is a figure which shows a 6th modification, (a) is a figure which shows arrangement | positioning of the pixel for an imaging of 8 rows x 8 columns which is a part of 1st image sensor part, (b) FIG. 4 is a diagram illustrating an arrangement of 4 × 4 column focus detection pixels which are a part of two image sensor units. It is a figure which shows a 7th modification, (a) is a figure which shows arrangement | positioning of the imaging pixel of 8 rows x 8 columns which is a part of 1st image sensor part, (b) FIG. 3 is a diagram illustrating an arrangement of focus detection pixels corresponding to an arrangement of imaging pixels of 8 rows × 8 columns, which is a part of the second imaging element unit and is a part of the first imaging element unit. It is a figure which shows an 8th modification, (a) is a figure which shows arrangement | positioning of the imaging pixel of 4 rows x 4 columns which is a part of 1st image sensor part, (b) FIG. 4 is a diagram illustrating an arrangement of 4 × 4 column focus detection pixels which are a part of two image sensor units. It is sectional drawing which shows the structure for 2 pixels of the pixel for imaging, and 2 pixels of a focus detection pixel about the 1st and 2nd image sensor part based on an 8th modification. It is a figure which shows the other example of an 8th modification, (a) is a figure which shows arrangement | positioning of the imaging pixel of 4 rows x 4 columns which is a part of 1st image sensor part, (b) () Is a diagram showing an arrangement of 4 rows × 4 columns of focus detection pixels which are part of the second image sensor section. It is a figure which shows the outline | summary of the 1st and 2nd image pick-up element part which concerns on a 9th modification. It is a figure which shows a 9th modification, (a) is a figure which shows arrangement | positioning of the imaging pixel of 4 rows x 4 columns which is a part of 1st image sensor part, (b) It is a figure which shows arrangement | positioning of the pixel for a focus detection of 8 rows x 8 columns which is a part of 2 image sensor parts.

(First embodiment)
FIG. 1 is a diagram illustrating a configuration of a digital camera 1 according to an embodiment of the present invention. The digital camera 1 includes a photographing optical system 10, an imaging unit 11, a control unit 12, an operation unit 13, an image processing unit 14, a liquid crystal monitor 15, and a buffer memory 16. In addition, a memory card 17 is attached to the digital camera 1. The memory card 17 is composed of a non-volatile flash memory or the like and is detachable from the digital camera 1.

  The photographic optical system 10 includes a plurality of lenses, and forms a subject image on the imaging surface of the imaging unit 11. The plurality of lenses constituting the photographing optical system 10 includes a focus lens that moves in the optical axis direction for focus adjustment. The focus lens is moved in the optical axis direction by a lens driving unit (not shown).

  The imaging unit 11 includes an imaging element having first and second imaging elements 21 and 22 stacked on each other, an amplifier circuit 23, and an AD conversion circuit 24. Each of the first and second imaging elements 21 and 22 is composed of a plurality of pixels arranged two-dimensionally, receives a light beam from a subject via the photographing optical system 10, performs photoelectric conversion, and performs signal conversion. Is output. Each pixel of the first and second image sensors 21 and 22 outputs an analog signal, as will be described in detail later. As will be described later, these signals are used as a contrast focus detection signal, as an exposure calculation signal, or as a captured image signal. The amplifier circuit 23 amplifies the signal with a predetermined amplification factor (gain) and outputs the amplified signal to the AD conversion circuit 24. The AD conversion circuit 24 AD converts the signal.

  The control unit 12 includes a microprocessor and its peripheral circuits, and performs various controls of the digital camera 1 by executing a control program stored in a ROM (not shown). It also controls a lens driving unit (not shown). The control unit 12 functionally includes a focus detection unit 12a, an exposure calculation unit 12b, and a focus detection area setting unit 12c. Each of these functional units is implemented in software by the control program described above. Each of these functional units can also be configured by an electronic circuit.

  The control unit 12 stores the signal AD-converted by the AD conversion circuit 24 in the buffer memory 16. The focus detection unit 12a performs a focus detection process of a known contrast detection method based on the signal of the second image sensor 22 stored in the buffer memory 16. The exposure calculation unit 12b performs an exposure calculation process based on the signal of the first image sensor 21 stored in the buffer memory 16, and calculates an appropriate exposure time, that is, an appropriate shutter time, an appropriate aperture value, and an appropriate sensitivity.

  The image processing unit 14 is configured by an ASIC or the like. The image processing unit 14 performs various kinds of image processing such as interpolation processing, compression processing, white balance processing, and image compression on the signal of the first image sensor 21 stored in the buffer memory 16 to generate image data. To do. This image data is displayed on the liquid crystal monitor 15 or stored in the memory card 17.

  The operation unit 13 includes various operation members such as a release operation member, a mode switching operation member, a focus detection area setting operation member, and a power operation member, and is operated by a photographer. The operation unit 13 outputs an operation signal corresponding to the operation of each operation member by the photographer to the control unit 12.

  The focus detection area setting unit 12c sets a focus detection area in a predetermined area in the shooting screen in accordance with the operation of the operation member for setting the focus detection area or based on the recognition result of the subject person by the subject recognition unit (not shown). Set.

(Description of the first and second image sensors 21 and 22)
FIG. 2 is a diagram showing an outline of the first and second imaging elements 21 and 22 according to the present embodiment. The image pickup device includes first and second image pickup devices 21 and 22 stacked on each other. The first image sensor 21 has an organic photoelectric conversion film as a photoelectric conversion unit, and the second image sensor 22 has a photodiode formed on a semiconductor substrate as a photoelectric conversion unit. The first and second imaging elements 21 and 22 capture images so that the optical axis of the imaging optical system 10 shown in FIG. 1 passes through the centers of the imaging surfaces of the first and second imaging elements 21 and 22, respectively. It is disposed in the optical path of the optical system 10. In FIG. 2, the first and second image sensors 21 and 22 are configured to have 4 rows × 4 columns of imaging pixels 210 and 2 rows × 2 columns of focus detection pixels in order to avoid complication of the drawing. Although only 220 is shown, in the first embodiment, 2m rows × 2n columns of imaging pixels 210 and m rows × n columns of focus detection pixels 220 are arranged.

  The length in the row direction (first direction in FIG. 3) and the column direction (second direction in FIG. 3) of the imaging pixels of the first imaging element 21 is the row of the focus detection pixels of the second imaging element 22. One half of the length in the direction and column direction. The total area of the four imaging pixels 210 in 2 rows and 2 columns of the first image sensor 21 is equal to the area of one focus detection pixel 220 of the second image sensor 22. In other words, the light receiving area of the focus detection pixel of the imaging element 22 is larger than the light receiving area of the photoelectric conversion unit of the imaging pixel of the imaging element 21. In the present embodiment, the light receiving area of the focus detection pixel of the image sensor 22 is four times the light receiving area of the photoelectric conversion unit of the image pickup pixel of the image sensor 21. The four imaging pixels 210 in the second row and the second column of the first imaging element 21 and the one focus detection pixel 220 of the second imaging element 22 positioned immediately behind the four imaging pixels 210 are in a correspondence relationship. When viewed from the subject side, the four imaging pixels 210 and the one focus detection pixel 220 overlap with each other without shifting in the row and column directions.

  Each imaging pixel 210 of the first imaging element 21 has an organic photoelectric conversion film that absorbs (photoelectrically converts) light of a predetermined color component. The light of the color component that has not been absorbed (photoelectrically converted) by the first image sensor 21 passes through the first image sensor 21 and enters the second image sensor 22, and is photoelectrically converted by the second image sensor 22. Is done. In other words, the light flux that has passed through the four imaging pixels 210 in the second row and the second column of the first imaging element 21 is used to detect one focus of the second imaging element 22 that has a corresponding relationship with the four imaging pixels 210. The pixel 220 receives light. The color component that is photoelectrically converted by the first image sensor 21 and the color component of light that passes through the first image sensor 21 have a complementary color relationship.

  FIG. 3 shows the arrangement of 8 rows × 8 columns of imaging pixels 210 that are part of the first image sensor 21 and 4 rows × 4 columns of focus detection pixels that are part of the second image sensor 22. It is a figure which shows arrangement | positioning 220 respectively. In FIG. 3A, “G” attached to the imaging pixel 210 for the first imaging element 21 is a pixel in which the pixel absorbs a green color component and photoelectrically converts, that is, a green spectral sensitivity. The pixel which has is shown. Similarly, “B” attached to the imaging pixel 210 indicates a pixel that absorbs a blue color component and performs photoelectric conversion, that is, a pixel having blue spectral sensitivity. Similarly, “R” attached to the imaging pixel 210 indicates a pixel that absorbs a red color component and performs photoelectric conversion, that is, a pixel having red spectral sensitivity. In the first imaging element 21, “G” pixels 210 and “B” pixels 210 are alternately arranged in odd-numbered pixel columns, and “R” pixels 210 and “G” pixels 210 are arranged in even-numbered pixel columns. And are arranged alternately. That is, in the first image sensor 21, the imaging pixels are arranged in a Bayer array. An RGB image composed of three colors R, G, and B can be acquired from the first image sensor 21.

  Each focus detection pixel 220 of the second image sensor 22 shown in FIG. 3B includes magenta color component light transmitted through the two “G” pixels 210 of the first image sensor 21, and 1 Light of a yellow color component transmitted through one “B” pixel 210 and light of a cyan color component transmitted through one “R” pixel 210 are incident. That is, each focus detection pixel 220 of the second image sensor 22 transmits light of magenta color components and light of yellow color components respectively transmitted through the image pickup pixels 210 of 2 rows and 2 columns of the first image sensor 21. And the cyan color component light are photoelectrically converted.

  FIG. 4 is a cross-sectional view illustrating the configuration of two pixels of the imaging pixel 210 and one pixel of the focus detection pixel 220 for the first and second imaging elements 21 and 22. As shown in FIG. 4, the second image sensor 22 is formed on a semiconductor substrate 50, and each focus detection pixel 220 includes a photoelectric conversion unit 220a. The first image sensor 21 is stacked on the surface of the second image sensor 22, that is, the upper surface, with the planarizing layer 55 interposed. On the semiconductor substrate 50, signal readout circuits (not shown) that read out signals from the respective pixels 210 and 220 of the first and second image sensors 21 and 22 are formed. Further, in the flattening layer 55, a wiring layer (not shown) that connects each imaging pixel 210 and signal readout circuit of the first imaging element 21, and each focus detection pixel 220 of the second imaging element 22 and A wiring layer (not shown) for connecting the signal readout circuit is formed.

Each imaging pixel 210 of the first imaging element 21 includes an organic photoelectric conversion film 230 that absorbs a green (G) color component, a blue (B) color component, or a red (R) color component, and an organic photoelectric conversion device. It has a transparent electrode 231 formed on the upper surface of the conversion film 230, that is, a subject-side surface of the organic photoelectric conversion film 230, and a transparent electrode 232 formed on the lower surface of the organic photoelectric conversion film 230.
Note that one of the upper transparent electrode 231 and the lower transparent electrode 232 may be a common electrode common to all the imaging pixels 210.

In the first embodiment, in the digital camera 1, when the power switch is turned on by the operation unit 13, signal readout of the pixels 210 and 220 of the first and second imaging elements 21 and 22 is repeatedly performed simultaneously. The image processing unit 14 performs various kinds of image processing such as interpolation processing and white balance processing on the signals from the respective imaging pixels 210 of the first image sensor 21 to generate display image data. Is displayed on the liquid crystal monitor 15 as a live view image. Simultaneously with the display of the live view image, the exposure calculation unit 12b performs a photometric process based on a signal from each imaging pixel 210 of the first imaging element 21. The exposure calculation unit 12b sets an appropriate exposure condition, for example, white balance, an exposure time for giving an appropriate exposure, an aperture value, and a sensitivity based on the luminance information detected by the photometric processing. In addition, the control unit 12 performs subject recognition and subject tracking based on a signal from each imaging pixel 210 of the first imaging element 21.
The focus detection unit 12a also receives signals from the plurality of focus detection pixels 220 of the second image sensor 22 arranged at a position corresponding to the focus detection area set by the focus detection area setting unit 12c, that is, focus detection. A focus detection process is performed based on the signal. For example, the focus detection unit 12a performs a focus detection process of a known contrast detection method that calculates a difference between signals of adjacent focus detection pixels and integrates the differences. Based on the focus detection result, the control unit 12 moves the focus lens of the photographing optical system 10.

  When the release operation is performed by the release operation member, the focus lens moves to the in-focus position detected by the focus detection unit 12a based on the signals from the plurality of focus detection pixels 220 of the second image sensor 22, and thereafter The image processing unit 14 performs interpolation processing, image compression processing, and the like on the signals from the respective imaging pixels 210 of the first image sensor 21, generates recording image data, and stores the recording image data. Store in the memory card 17.

In this way, photometric processing and image data generation are performed based on the signal from the first image sensor 21, and focus detection processing is performed based on the signal from the second image sensor 22. Since the first imaging element section 21 has a larger number of pixels than the second imaging element 22, it can obtain high-resolution image data, can improve the accuracy of exposure control, Since the image sensor 22 has a larger pixel size (light-receiving area of the photoelectric conversion unit) than the first image sensor 21, the SN ratio of the focus detection signal is increased, and high-precision focus detection can be performed. Particularly, focus detection can be performed quickly and with high accuracy even for a low-luminance subject.
In addition, the incident light is received by the first image sensor 21, and the transmitted light that has passed through the first image sensor 21 is received by the second image sensor 22. Therefore, the incident light can be used efficiently.
Further, by performing photometric processing and image data generation based on the signal from the first image sensor 21, and performing focus detection processing based on the signal from the second image sensor 22, the same portion of the subject image Can simultaneously acquire subject image information, that is, information for photometric processing and image data generation, and information for focus detection processing, from both the first image sensor 21 and the second image sensor 22.

---- Modified example ---
FIG. 5 shows a first modification of the above-described first embodiment.
(1) In the first embodiment described above, the focus detection unit 12a performs focus detection using a contrast detection method. However, in the first modification, the focus detection unit 12a uses a phase-difference focus with pupil division. Perform detection. FIG. 5A shows an arrangement of the imaging pixels 210 of 8 rows × 8 columns, which is a part of the first imaging element 21. The first image sensor 21 is the same as the first image sensor 21 shown in FIG. FIG. 5B shows an arrangement of focus detection pixels 220 </ b> A of 4 rows × 4 columns that are a part of the second image sensor 22. Each focus detection pixel 220A of the second image sensor 22 has two photoelectric conversion units 221a and 221b arranged in the row direction, that is, in the left-right direction. The size of each focus detection pixel 220A of the second image sensor 22 (the light receiving area of the photoelectric conversion unit) is the same as in the first embodiment described above, and the four images in the 2 rows and 2 columns of the first image sensor 21 are used. It is equal to the size of the pixel 210 (light receiving area of the photoelectric conversion unit).

  FIG. 6 is a cross-sectional view showing the configuration of two pixels 210 and one pixel 220A for the first and second imaging elements 21 and 22 in the present modification. A microlens 233 is disposed between the first image sensor 21 and the second image sensor 22. Each of the first and second photoelectric conversion units 221 a and 221 b of each focus detection pixel 220 </ b> A is disposed at a symmetrical position with respect to the optical axis of the microlens 233. Further, the distance between the microlens 233 and the first and second photoelectric conversion units 221a and 221b is set to be approximately equal to the focal length of the microlens 233. The first and second photoelectric conversion units 221 a and 221 b of each focus detection pixel 220 </ b> A of the second image pickup device 22 pass through the first and second pupil regions of the exit pupil of the imaging optical system 10, respectively. The luminous flux is received through the microlens 233, respectively.

  In the present modification, the focus detection unit 12a illustrated in FIG. 1 includes a plurality of focus detection pixels 220A arranged in the row direction at positions corresponding to the focus detection areas set by the focus detection area setting unit 12c. The first and second signals output from the first and second photoelectric conversion units 221a and 221b are acquired. Then, the focus detection unit 12a detects a shift amount, that is, a phase difference between a pair of images formed by the pair of light beams that have passed through the first and second pupil regions, based on the acquired first and second signals. Then, by calculating the defocus amount based on the image shift amount, a known phase difference type focus detection process is performed. Note that each focus detection pixel 22 of the second image sensor 22 is not limited to the two photoelectric conversion units 221a and 221b described above, and may include more photoelectric conversion units.

  Further, the photoelectric conversion units 221a and 221b of each focus detection pixel 220A may be arranged in the column direction, that is, in the vertical direction as shown in FIG. 7B, as shown in FIG. 8B. In addition, the pixels 220A may be arranged in the diagonal direction.

9 and 10 show a second modification of the first embodiment described above.
(2) In the first embodiment described above, the second image sensor 22 has the photodiode formed on the semiconductor substrate as the photoelectric conversion unit. However, in the second modification, the second image sensor 22 Similar to the first image sensor 21, an organic photoelectric conversion film is provided as a photoelectric conversion unit. FIG. 9 shows the arrangement of 8 rows × 8 columns of imaging pixels 210 that are part of the first image sensor 21 and 4 rows × 4 columns of focus detection pixels that are part of the second image sensor 22. The arrangement of 220B is shown. The first image sensor 21 shown in FIG. 9A is the same as the first image sensor 21 shown in FIG. In FIG. 9B, each focus detection pixel 220B of the second image sensor 22 has two photoelectric conversion units 222a and 222b arranged in the row direction, that is, in the left-right direction.

In FIG. 10, each focus detection pixel 220 </ b> B of the second image sensor 22 is formed on the organic photoelectric conversion film 225, the common electrode 226 formed on the upper surface of the organic photoelectric conversion film 225, and the lower surface of the organic photoelectric conversion film 225. A pair of partial electrodes 226a and 226b. The common electrode 226 may be configured in common for all the pixels 220B, or may be configured in common for each focus detection pixel. The organic photoelectric conversion film 225 receives light beams of cyan, yellow, and magenta color components that have passed through the four imaging pixels 210 in the second row and the second column of the first imaging device 21 and performs photoelectric conversion.
The region of the organic photoelectric conversion film 225 sandwiched between the partial electrode 226a and the common electrode 226 constitutes the photoelectric conversion unit 222a shown in FIG. 9B. The region of the organic photoelectric conversion film 225 sandwiched between the partial electrode 226b and the common electrode 226 constitutes the photoelectric conversion unit 222b shown in FIG. 9B. In other words, the region of the organic photoelectric conversion film 225 covered by the partial electrode 226a corresponds to the photoelectric conversion unit 222a illustrated in FIG. The region of the organic photoelectric conversion film 225 covered by the partial electrode 226b corresponds to the photoelectric conversion unit 222b illustrated in FIG.

The focus detection pixel 220B of the second imaging element 22 applies a bias voltage between the partial electrode 226a and the common electrode 226, and reads the first signal based on the electric charge in the photoelectric conversion unit 222a. In addition, the focus detection pixel 220B of the second image sensor 22 applies a bias voltage between the partial electrode 226b and the common electrode 226, and reads a second signal based on the electric charge in the photoelectric conversion unit 222b.
Based on the first and second signals, the focus detection unit 12a detects a shift amount of a pair of images formed by the pair of light beams that have passed through the first and second pupil regions, that is, a phase difference, and detects this difference. A defocus amount is calculated based on the image shift amount.
Further, the second image sensor 22 having the organic photoelectric conversion film has the first and second photoelectric conversion units 222a and 222b arranged in the row direction shown in FIG. ) Or the photoelectric conversion units 221a and 221b shown in FIG. 8B, they may be arranged in a column direction or an oblique direction.
Further, the focus detection pixel 220B of the second image sensor 22 may have one photoelectric conversion unit having the same size as the two first and second photoelectric conversion units 222a and 222b.

  In the first embodiment described above, the lengths of the focus detection pixels of the second image sensor 22 in the row direction and the column direction are the lengths of the image pickup pixels of the first image sensor 21 in the row direction and the column direction. Although it was 2 times, it is not restricted to this, For example, 3 times may be sufficient and 4 times or more may be sufficient. In other words, the light receiving area of the focus detection pixel of the image sensor 22 only needs to be larger than the light receiving area of the photoelectric conversion unit of the image pickup pixel of the image sensor 21. The light receiving area of the focus detection pixel of the imaging element 22 may be 9 times or 16 times the light receiving area of the photoelectric conversion unit of the imaging pixel of the imaging element 21.

  Furthermore, in the first embodiment described above, the lengths of the focus detection pixels of the second image sensor 22 in the row direction and the column direction are the lengths of the image pickup pixels of the first image sensor 21 in the row direction and the column direction. However, it may not be an integral multiple such as 1.5 times. In other words, the light receiving area of the focus detection pixel of the imaging element 22 may be 2 · 25 times the light receiving area of the photoelectric conversion unit of the imaging pixel of the imaging element 21.

FIG. 11 shows a third modification of the first embodiment described above.
(3) FIG. 11 is a diagram illustrating the positional relationship between the imaging pixel 210 of the first imaging element 21 and the focus detection pixel 220 of the second imaging element 22. FIG. 11 is a view of the imaging pixel 210 of the first imaging element 21 and the focus detection pixel 220 of the second imaging element 22 as viewed from the subject side. In the first embodiment described above, four focus detection pixels 210 of the first image sensor 21 in two rows and two columns and one second image sensor 22 located immediately behind the four pixels 210 are used for focus detection. The pixel 220 has a correspondence relationship. In the first embodiment described above, when viewed from the subject side, the four imaging pixels 210 and the one focus detection pixel 220 overlap with each other without shifting in the row and column directions. However, as shown in FIG. 11, the four imaging pixels 210 and the one focus detection pixel 220 may be shifted in the row direction or the column direction.

FIG. 15 shows a fourth modification of the first embodiment described above.
In the first embodiment described above, the pixels of the first image sensor 21 are arranged in a Bayer array, and the sizes of the “G” pixel 210, the “B” pixel 210, and the “R” pixel 210 are the same. However, since the number of “G” pixels 210 is twice the number of “R” pixels or “B” pixels, the size of the “G” pixel 210 is changed to the “B” pixel 210 or the “R” pixel. The size may be smaller than 210. For example, the size of the “G” pixel 210 may be half the size of the “B” pixel 210 or the “R” pixel 210. FIG. 15 is a diagram illustrating an example in which the size of the “G” pixel 210A of the first image sensor 21 is smaller than the size of the “B” pixel 210B or the “R” pixel 210B. FIG. 4 is a diagram illustrating an arrangement of pixels 210A and 210B of 8 rows × 8 columns that are a part of the element 21 and an arrangement of pixels 220 of 4 rows × 4 columns that are a part of the second image sensor 22. . The second image sensor 22 shown in FIG. 15B is the same as the second image sensor 22 shown in FIG.

In FIG. 15A, among the pixels arranged in the Bayer array, the length in the column direction of the “G” pixel 210A is shorter than the “G” pixel 210 in the above-described embodiment by a predetermined amount, The length in the column direction of the “B” pixel 210B and the “R” pixel 210B adjacent to the “G” pixel 210A in the column direction is long. That is, for the “G”, “B”, “R”, and “G” pixels 210A, 210B, 210B, and 210A in 2 rows and 2 columns, the size of the “G” pixel 210A is “B” and “R” pixel 210B. And the size of the “B” and “R” pixels 210B is the same. For example, in order to make the size of the “G” pixel 210 one half of the size of the “B” pixel 210 and the “R” pixel 210, the length of the “G” pixel 210A in the column direction is “ The length of the “B” pixel 210B and the “R” pixel 210B in the column direction may be halved.
Regarding the “R”, “G”, and “B” pixels in 2 rows and 2 columns, in order to make the size of the “G” pixel smaller than the size of the “R” or “B” pixel, For the “G” pixel 210A and the “B” pixel 210B arranged side by side, the length of the “G” pixel 210A in the row direction is shortened, and the length of the “B” pixel 210B is increased accordingly. Similarly, for the “R” pixel 210B and the “G” pixel 210A arranged in the row direction, the length in the row direction of the “G” pixel 210A is shortened, and the length of the “R” pixel 210B is lengthened accordingly. May be.

(Second Embodiment)
FIG. 12 shows an embodiment. In addition, description is abbreviate | omitted about the structure similar to 1st Embodiment. In the first embodiment, image data and a photometric signal are generated based on a signal output from the first image sensor 21, and a focus detection signal is generated based on a signal output from the second image sensor 22. In the second embodiment, image data and a photometric signal are generated based on a signal output from the first image sensor 21, and a focus detection signal and an image signal are generated based on a signal output from the second image sensor 22. Is generated. Note that a photometric signal may be generated based on the signal output from the second image sensor 22. In that case, only image data may be generated based on a signal output from the first image sensor 21. Alternatively, exposure control may be performed from a photometric signal based on a signal output from the first image sensor 21 and a photometric signal based on a signal output from the second image sensor 22.
FIG. 12 shows the arrangement of the imaging pixels 210 of 8 rows × 8 columns, which are a part of the first image sensor 21, and the arrangement of a part of the pixels 220 and 220F of the second image sensor 22. Show. The first image sensor 21 shown in FIG. 12A is the same as the first image sensor 21 shown in FIG.

  The second image sensor 22 illustrated in FIG. 12B includes the focus detection pixels 220 in the odd-numbered rows and even columns and the even-numbered pixels among the focus detection pixels 220 of the second image sensor 22 illustrated in FIG. The focus detection pixels 220 in the row and odd columns are replaced with the imaging pixels 220F in 2 rows and 2 columns. Thus, in the second image sensor 22, large focus detection pixels 220 and 2 × 2 image pickup pixels 220F are alternately arranged in a checkered pattern in the row direction and the column direction. The area of the focus detection pixel 220 is larger than the area of the pixel 210. For example, the light receiving area of the photoelectric conversion unit of the focus detection pixel 220 is four times the light receiving area of the photoelectric conversion unit of the pixel 210. The magnitude relationship between the focus detection pixels 220 and the pixels 210 in the second embodiment is the same as that in the first embodiment. Note that the size of the imaging pixel 220F is equal to the size of the pixel 210 of the first imaging element 21.

Among the 2 × 2 imaging pixels 220 </ b> F, the upper left and lower right “Mg” pixels 220 </ b> F are located immediately behind the “G” pixels 210 of the first image sensor 21, and pass through the “G” pixels 210. The magenta color component light is received. Similarly, the lower left “Cy” pixel 220 </ b> F is positioned immediately behind the “R” pixel 210 of the first image sensor 21, and receives light of a cyan color component transmitted through the “R” pixel 210. The “Ye” pixel 220 </ b> F in the upper right is located immediately behind the “B” pixel 210 of the first image sensor 21 and receives the light of the yellow color component transmitted through the “B” pixel 210.
On the other hand, the large focus detection pixel 220 is similar to the focus detection pixel 220 shown in FIG. 3, and the magenta color component light transmitted through the two “G” pixels 210 of the first image sensor 21. Light of yellow color component transmitted through one “B” pixel 210 and light of cyan color component transmitted through one “R” pixel 210 are received.

  In the second embodiment, the focus detection unit 12a is based on signals from a plurality of focus detection pixels 220 arranged at positions corresponding to the focus detection area set by the focus detection area setting unit 12c. The focus detection process is performed. Further, the image processing unit 14 generates display image data based on a signal from the imaging pixel 220 </ b> F of the second imaging element 22. This display image data is displayed on the liquid crystal monitor 15 as a live view image. Note that the number of pixels 220F for the image pickup element 22 of the second image pickup device 22 is half the number of pixels 210 for the image pickup pixel 210 of the first image pickup element 21, but from the image pickup pixel 220F of the second image pickup element 22 The image data for display based on the signal has sufficient resolution as a live view image displayed on the liquid crystal monitor 15.

Further, the signal from the imaging pixel 210 of the first imaging element 21 is used for generating image data for display and recording, similarly to the signal of the first imaging element 21 shown in FIG. And used as a photometric signal for exposure calculation. It should be noted that an appropriate exposure condition, for example, white balance, an exposure time giving an appropriate exposure, an aperture value, and sensitivity may be set from a photometric signal based on a signal output from the second image sensor 22. Further, subject recognition and subject tracking may be performed from a photometric signal based on a signal output from the second image sensor 22.
In the second embodiment, display image data is generated from each of the first and second imaging elements 21 and 22, so that the signal readout cycle of the imaging pixel 210 of the first imaging element 21 and the first The display image data from the first image sensor 21 and the display image data from the second image sensor 22 are shifted by, for example, shifting the signal readout cycle of the imaging pixels 220F of the second image sensor 22 by a half cycle. Can be alternately displayed on the monitor 15.
Further, the signal of the imaging pixel 210 of the imaging element 21 of the first imaging element 21 may be corrected using the signal of the imaging pixel 220F of the second imaging element 22.

  In addition, the focus detection pixel 220 of the second image sensor 22 includes the first and second photoelectric conversion units 221 a, The phase difference type focus detection signal may be generated by providing 221b or 222a, 222b and the micro lens 233.

---- Modified example ---
FIG. 13 shows a first modification of the second embodiment described above.
(1) This modification further includes a focus detection pixel 220G as shown in FIG. 13B in the central region of the four imaging pixels 220F in 2 rows and 2 columns shown in FIG. It is provided. Other configurations are the same as those of the second embodiment shown in FIG. In FIG. 13B, the focus detection pixel 220G is located in the central region of the four imaging pixels 220F in 2 rows and 2 columns. The size of the focus detection pixel 220G, that is, the light receiving area of the photoelectric conversion unit is one third of the light receiving area of the photoelectric conversion unit of the four imaging pixels 220F in 2 rows and 2 columns in FIG.

FIG. 14 shows the imaging pixel 210 and the focus detection pixel 220G in order to show the relative positional relationship between the imaging pixel 210 of the first imaging device 21 and the focus detection pixel 220G of the second imaging device 22. It is shown repeatedly.
Accordingly, the focus detection pixel 220G includes a part of the transmitted light of the magenta color component that has passed through the two “G” pixels 210 of the first image sensor 21 and the cyan light that has passed through the “R” pixel 210. A part of the transmitted light of the color component and a part of the transmitted light of the yellow color component transmitted through the “B” pixel 210 are respectively incident.

  In the present modification, the second image sensor 22 is a small focus detection pixel having a large focus detection pixel 220 and a quarter size of the large focus detection pixel 220 (light receiving area of the photoelectric conversion unit). Pixels 220G are alternately arranged in the vertical and horizontal directions. Accordingly, the focus detection unit 12a performs the first contrast detection type focus detection process based on the signals from the plurality of large focus detection pixels 220 in the focus detection area set by the focus detection area setting unit 12c. Based on the signals from the plurality of small focus detection pixels 220G, the second contrast detection type focus detection process can be performed. Based on the result of the first contrast detection type focus detection process and the result of the second contrast detection type focus detection process, the focus adjustment of the photographing optical system 10 is performed.

  The first contrast detection type focus detection based on signals from the plurality of large focus detection pixels 220 detects the contrast between the large focus detection pixels 220 adjacent to each other. Similarly, the second contrast detection type focus detection based on signals from a plurality of small focus detection pixels 220G also detects the contrast of the small focus detection pixels 220G adjacent to each other. Next, an example in which the contrast between the large and small focus detection pixels 220 and 220G adjacent to each other is detected will be described. Since the light receiving area of the photoelectric conversion unit of the small focus detection pixel 220G is a quarter of the light receiving area of the photoelectric conversion unit of the large focus detection pixel 220, a signal from the small focus detection pixel 220G is used. Amplify 4 times. In order to detect the contrast between the large and small focus detection pixels 220 and 220G adjacent to each other, the signal focus detection unit 12a is adjacent to the signal amplified four times from the small focus detection pixel 220G. The difference from the signal from the large focus detection pixel 220 is calculated. The contrast is detected by integrating the calculated differences. The contrast between the large and small focus detection pixels 220 and 220G adjacent to each other is detected as compared with the case where the contrast between the large focus detection pixels 220 adjacent to each other is detected. Can be detected.

In addition, the focus detection pixel 220 of the second image sensor 22 includes the first and second photoelectric conversion units 221 a, The phase difference type focus detection signal may be generated by providing 221b or 222a, 222b and the micro lens 233. In this case, the focus detection unit 12a includes the first and second photoelectric conversion units 221a of the plurality of focus detection pixels 220A arranged at positions corresponding to the focus detection areas set by the focus detection area setting unit 12c. , 221b or 222a, 222b based on a known phase difference type focus detection process, and based on signals from a plurality of focus detection pixels 220G arranged at positions corresponding to the focus detection area, You may make it perform the focus detection process of a well-known contrast detection system.
12 and 13, the second image sensor 22 includes focus detection pixels 220 and 2 × 2 image pickup pixels 220F alternately arranged in a checkered pattern in the row direction and the column direction. However, the arrangement of the focus detection pixels 220 and the imaging pixels 220F is not limited to this. For example, the focus detection pixels 220 and the imaging pixels 220F may be arranged in one row or one column, respectively. The focus detection pixels 220 and the imaging pixels 220F may be arranged in a plurality of rows or columns, respectively. The four focus detection pixels 220 in 2 rows and 2 columns and the 16 imaging pixels 220F in 4 rows and 4 columns may be alternately arranged in a checkered pattern in the row direction and the column direction. The focus detection pixels 220 may be arranged in a part of the second image sensor 22 corresponding to the focus detection area.

FIG. 16 shows a second modification of the second embodiment described above.
(2) This modification is a modification of the modification shown in FIG. In FIG. 16, the first image sensor 21 of the present modification is the same as the first image sensor 21 of the modification shown in FIG. Regarding the “G” and “R” pixels 210A and 210B adjacent in the column direction, the length of the “G” pixel 210A is shorter than the length of the “R” pixel 210B, and the “B” and “G” adjacent in the column direction. Also for the pixels 210B and 210A, the length of the “G” pixel 210A is shorter than the length of the “B” pixel 210B.

  As described above, the size of the “G” pixel 210 </ b> A of the first image sensor 21 is smaller than the sizes of the “R” pixel 210 </ b> B and the “B” pixel 210 </ b> B. For the “Mg”, “Ye”, “Cy”, and “Mg” imaging pixels 220H, 220I, 220I, and 220H in the second column, the size of the “Mg” imaging pixel 220H is set to “Ye” and “Cy”. Is made smaller than the size of the imaging pixel 220I. That is, the size of the “Mg” imaging pixel 220 </ b> H is the same as the size of the “G” pixel 210 </ b> A of the first imaging device 21, and the size of the “Ye” imaging pixel 220 </ b> I is the same as the first imaging device 21. The size of the “B” pixel 210 </ b> B is made the same as the size of the “C” pixel 220 </ b> I and the size of the “R” pixel 210 </ b> B of the first image sensor 21.

  Therefore, for the “Mg”, “Ye”, “Cy”, and “Mg” imaging pixels 220H, 220I, 220I, and 220H of the second imaging element 22, two “Mg” pixels 220H correspond to the corresponding second pixels. The light of the magenta color component transmitted through the “G” pixel 210 </ b> A of one image sensor 21 is received. The “Cy” pixel 220I receives light of a cyan color component that has passed through the “R” pixel 210B of the corresponding first image sensor 21. The “Ye” pixel 220I receives the light of the yellow color component transmitted through the corresponding “B” pixel 210.

  In addition, the focus detection pixel 220 of the second image sensor 22 includes the first and second photoelectric conversion units 221 a, The phase difference type focus detection signal may be generated by providing 221b or 222a, 222b and the micro lens 233.

---- Other modifications ---
FIG. 17 shows a modification of the above-described embodiment.
In the embodiment described above, one pixel 220 of the second image sensor 22 corresponds to the four pixels 210 of 2 rows and 2 columns of the first image sensor 21. However, one pixel 220 of the second image sensor 22 may correspond to one pixel of the first image sensor 21. FIG. 17 illustrates an arrangement of 4 rows × 4 columns of pixels 210 </ b> C that is a part of the first image sensor 21, an arrangement of pixels 220 of 4 rows × 4 columns that are a part of the second image sensor 22, Respectively.

  FIG. 18 is a cross-sectional view illustrating the configuration of two pixels of the imaging pixel 210 </ b> C and two pixels of the focus detection pixel 220 for the first and second imaging elements 21 and 22. In FIG. 18, each imaging pixel 210 </ b> C of the first imaging element 21 includes an organic photoelectric conversion film 230, an upper transparent electrode 231 that covers the entire upper surface of the organic photoelectric conversion film 230, and the organic photoelectric conversion film 230. In part, the illustrated example includes a lower transparent electrode 234 that covers a quarter of the area of the organic photoelectric conversion film 230. The organic photoelectric conversion film 230 absorbs light of a color component “G”, “R”, or “B” for each pixel and performs photoelectric conversion, and color components “Mg”, “Cy”, and “Ye”, respectively. Transmits light. In the imaging pixel 210 </ b> C, a charge, that is, a signal is read from the lower transparent electrode 234 by a bias voltage applied to the upper transparent electrode 231 and the lower transparent electrode 234. Therefore, the imaging pixel 210C has the organic photoelectric conversion film 230 corresponding to the entire pixel surface, but the substantial photoelectric conversion region corresponds to the lower transparent electrode 234 shown by hatching in FIG. This is an area 211.

The second image sensor 22 corresponds to the “Mg” focus detection pixel 220 corresponding to the “G” pixel 210C of the first image sensor 21 and the “R” pixel 210C corresponding to the “R” pixel 210C of the first image sensor 21. It has a focus detection pixel 220 of “Cy” and a focus detection pixel 220 of “Ye” corresponding to the “B” pixel 210 </ b> C of the first image sensor 21. The size of the focus detection pixels 220 of “Mg”, “Cy”, and “Ye” of the second imaging element 22 is the same as the size of the organic photoelectric conversion film 230 of the imaging pixel 210 </ b> C of the first imaging element 21. equal.
As described above, each of the imaging pixels 210 </ b> C of the first image sensor 21 has an apparent size (the size of the organic photoelectric conversion film 230) substantially equal to the size of each pixel 220 of the second image sensor 22. However, the substantial photoelectric conversion region 211 (hereinafter, this region is also referred to as an effective pixel region) is smaller than the size of the focus detection pixel 220 of the second image sensor 22. That is, the size of the focus detection pixel 220 of the second imaging element 22 is larger than the effective pixel area of the imaging pixel 210 </ b> C of the first imaging element 21.

  The focus detection unit 12a executes a contrast detection type focus detection process based on a signal from the focus detection pixel 220 of the second image sensor 220. Note that the contrast detection type focus detection processing may detect contrast between focus detection pixels having the same spectral sensitivity, or may detect contrast between focus detection pixels having different spectral sensitivities. That is, the focus detection unit 12a detects the contrast between the “Mg” focus detection pixels adjacent to each other based on the signal from the “Mg” focus detection pixel, and similarly detects the focus of “Cy”. Based on the signal from the pixel, the contrast between the “Cy” focus detection pixels adjacent to each other is detected, and based on the signal from the “Ye” focus detection pixel, the “Ye” focus detection pixels adjacent to each other. A contrast detection result may be detected, and a focus detection result for each color component may be calculated. Further, the focus detection unit 12a, based on the signals from the focus detection pixels of “Mg”, “Cy”, and “Ye”, contrast between the focus detection pixels of “Mg” and “Cy” adjacent to each other, The contrast between the “Mg” and “Ye” focus detection pixels adjacent to each other may be detected.

  In the eighth modification shown in FIGS. 17 and 18, the four imaging pixels 210 </ b> C in 2 rows and 2 columns are positioned so that the respective photoelectric conversion regions 211, 211, 211, and 211 are connected to each other. However, as illustrated in FIG. 19A, the photoelectric conversion region 212 of each imaging pixel 210 </ b> C may be positioned at the center of the pixel.

In the above embodiment and its modifications, the size of the focus detection pixel is larger than the size of the imaging pixel, but the size of the focus detection pixel may be smaller than the size of the imaging pixel.
Next, a modified example of the above-described embodiment will be described.
In the embodiment described above, the imaging pixel 210 is provided in the first imaging element 21, and the focus detection pixel 220 larger than the imaging pixel 210 is provided in the second imaging element 22. 20 and 21 are diagrams illustrating an overview of the first and second imaging elements 21A and 22A according to the ninth modification. In the ninth modification, the first imaging element 21A having an organic photoelectric conversion film as a photoelectric conversion unit has a focus detection pixel 210D larger than the imaging pixel 220J of the second imaging element 22A. The second imaging element 22A having an organic photoelectric conversion film or a photodiode as a photoelectric conversion unit has an imaging pixel 220J that is smaller than the large focus detection pixel 210D of the first imaging element 21A.

Each focus detection pixel 210D of the first image sensor 21A includes a “G” pixel 210D, an “R” pixel 210D, and a “B” pixel 210D, and these focus detection pixels 210D are arranged in a Bayer array.
The imaging pixel 220J of the second imaging element 22A corresponds to the “G” pixel 210D of the first imaging element 21A and the small “Mg” pixel 220J of 2 rows and 2 columns, and the “R” of the first imaging element 21A. The small “Cy” pixel 220J of 2 rows and 2 columns corresponds to the “pixel 210D”, and the small “Ye” pixel 220J of 2 rows and 2 columns corresponds to the “B” pixel 210D of the first image sensor 21A.

  In this modification, the focus detection unit 12a is a known contrast detection method based on signals from a plurality of focus detection pixels 210D arranged at positions corresponding to the focus detection area set by the focus detection area setting unit 12c. The focus detection process is performed. In addition, the image processing unit 14 performs interpolation processing, image compression processing, and the like on the signal from the imaging pixel 220J of the second imaging element 22A to generate recording image data, and this recording image data Is stored in the memory card 17.

  In addition, you may combine embodiment mentioned above and a modification, respectively.

  While various embodiments and modifications have been described above, the present invention is not limited to these contents. Other embodiments conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1; Digital camera, 10: Image pick-up optical system, 11; Image pick-up part, 12: Control part, 12a; Focus detection part, 14: Image processing part, 21: 1st image pick-up element, 22; Pixels (imaging pixels), 220; pixels (focus detection pixels)

Claims (17)

A first imaging element having a first pixel that receives light incident through an optical system having a focus adjustment optical system and outputs a signal;
The light that has passed through the first image sensor is received and a signal is output, the second pixel having an area larger than the area of the first pixel, and the light that has passed through the first image sensor is received and a signal is output. And a second imaging device having a third pixel having an area different from the area of the second pixel. The imaging device according to claim 1,
The first pixel, the second pixel, and the third pixel each include a photoelectric conversion unit that generates charge from received light, and an output unit that converts the charge generated by the photoelectric conversion unit into current or voltage and outputs the current or voltage And an imaging device having each of the above. The image sensor according to claim 1 or 2,
The area of the second pixel is an image sensor that is an integral multiple of the area of the first pixel. A first imaging element having a first pixel having a first photoelectric conversion unit that photoelectrically converts light incident through an optical system having a focus adjustment optical system and outputs a signal;
A second pixel having a second light-receiving area that has a light-receiving area larger than a light-receiving area of the first photoelectric conversion unit and photoelectrically converts light transmitted through the first imaging element and outputs a signal; and the first imaging An imaging device comprising: a second imaging device having a third pixel having a third photoelectric conversion unit that receives light transmitted through the device and outputs a signal. The imaging device according to claim 4,
The first pixel, the second pixel, and the third pixel convert the charges generated by the first photoelectric conversion unit, the second photoelectric conversion unit, and the third photoelectric conversion unit into current or voltage and output the current or voltage. Imaging devices each having a portion. The imaging device according to claim 4 or 5,
The light receiving area of the second photoelectric conversion unit is an imaging element that is an integral multiple of the light receiving area of the first photoelectric conversion unit. The imaging device according to any one of claims 1 to 6,
The second pixel outputs a signal used for focus adjustment of the optical system,
The third pixel is an image sensor that outputs a signal used for photometric calculation. The imaging device according to any one of claims 1 to 6,
The third pixel is an image sensor that outputs a signal used for setting an imaging condition of the first image sensor. The imaging device according to any one of claims 1 to 8,
The imaging device in which the first pixel, or the second pixel and the third pixel are organic photoelectric conversion films. The imaging device according to any one of claims 1 to 9,
A focus detection unit that detects a shift between the imaging plane of the optical system and the imaging element based on a signal output from the second pixel based on a signal output from the second pixel;
A photometric unit that performs photometry based on a signal output from the third pixel. The imaging device according to any one of claims 1 to 9,
A focus detection unit that detects a position of the focus adjustment optical system when light incident through the optical system forms an image on the image sensor based on a signal output from the second pixel;
A photometric unit that performs photometry based on a signal output from the third pixel. The imaging device according to claim 11,
The focus detection unit is configured to adjust the focus adjustment optical system when light incident through the optical system forms an image on the image sensor from the contrast of an image generated based on a signal output from the second pixel. An imaging device that detects the position of the camera. The imaging apparatus according to any one of claims 10 to 12,
An imaging apparatus comprising a display unit that displays an image generated based on a signal output from the third pixel. The imaging device according to any one of claims 10 to 13,
An imaging apparatus comprising a focus adjustment unit that moves the focus adjustment optical system based on a detection result of the focus detection unit. The imaging device according to any one of claims 10 to 14,
An imaging apparatus comprising a setting unit that sets an imaging condition based on a result of photometry by the photometry unit. The imaging device according to claim 15, wherein
The imaging apparatus is characterized in that the imaging condition is an exposure time, an aperture value, ISO sensitivity, or white balance. The imaging device according to any one of claims 10 to 16,
An imaging apparatus including an image data generation unit that generates image data based on a signal output from the first pixel.

Images