JP2012189777A - Solid electronic imaging apparatus and operation control method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To find, in a focus detecting photo-diode, a photo-diode in which a signal charge from an imaging photo-diode has been mixed.SOLUTION: A CCD includes the focus detecting photo-diode and the imaging photo-diode. When a focus lens is moved, the position x1 of the focus detecting photo-diode, which gives peaks P1 and P2 for a focus detection signal obtained by the focus detecting photo-diode before and after the movement, may not be changed. In such a case, it is determined that a signal charge from the imaging photo-diode has been mixed in the focus detecting photo-diode at the position x1.

Description

  The present invention relates to a solid-state electronic imaging device and an operation control method thereof.

  In a solid-state electronic image sensor in which a focus detection photoelectric conversion element that can be used for positioning of the focus lens other than the image pickup photoelectric conversion element is formed, the focus detection signal obtained from the focus detection photoelectric conversion element is used for focusing / The lens is positioned at the in-focus position. However, if the charge from the imaging photoelectric conversion element leaks to the focus detection photoelectric conversion element, the focus lens cannot be accurately positioned at the in-focus position using the focus detection signal.

  Therefore, it is possible to determine whether or not the electric charge from the imaging photoelectric conversion element leaks to the focus detection photoelectric conversion element based on whether or not the output of the imaging photoelectric conversion element adjacent to the focus detection photoelectric conversion element is equal to or higher than a specified value. Yes (Patent Document 1). However, since the saturation amount of the imaging photoelectric conversion element varies from element to element, the amount of charge leakage from the imaging photoelectric conversion element also varies. If the presence or absence of charge leakage is simply determined based on whether or not the output of the photoelectric conversion element for imaging is greater than or equal to a specified value, an erroneous determination may occur. In addition, there is a type in which a light-shielded photoelectric conversion element is provided in a solid-state electronic image pickup device, and the exposure time is adjusted when a leaked charge is mixed in the light-shielded photoelectric conversion element at a predetermined level or more (Patent Document 2). However, a light-shielded photoelectric conversion element must be provided in the solid-state electronic image sensor. In any case, the position of the focus detection photoelectric conversion element in which the charge from the imaging photoelectric conversion element is mixed cannot be detected accurately.

JP 2010-154115 A JP-A-8-76174

  An object of the present invention is to accurately detect the position of a focus detection photoelectric conversion element in which charges from an imaging photoelectric conversion element are mixed.

  A solid-state electronic imaging device according to the present invention includes a plurality of sets of focus detection photoelectric conversion elements, and a plurality of imaging photoelectric conversion elements arranged in a row direction and a column direction, A focus lens movable in the optical axis direction of the solid-state electronic image sensor in front of the light-receiving surface of the solid-state electronic image sensor, and a focus obtained from a plurality of focus detection photoelectric conversion elements included in the solid-state electronic image sensor Peak position detection means for detecting the peak position of the detection signal before and after the movement of the focus lens, and the peak position of the focus detection signal before and after the movement of the focus lens detected by the peak position detection means First determination means for determining whether or not the focus lens has changed before and after the movement, and the first determination hand For detecting the focus at a position corresponding to the peak position detected by the peak position detecting means when it is determined that the peak position of the focus detection signal before and after the movement of the focus lens has not changed. The photoelectric conversion element includes a second determination unit that determines that the charge from the imaging photoelectric conversion element is leaking.

  The present invention also provides an operation control method suitable for the solid-state electronic imaging device. That is, a solid-state electronic image pickup apparatus including a solid-state electronic image pickup element including a plurality of sets of focus detection photoelectric conversion elements and a plurality of image pickup photoelectric conversion elements arranged in a row direction and a column direction. In the operation control method, the focus lens is movable in the optical axis direction of the solid-state electronic image sensor in front of the light receiving surface of the solid-state electronic image sensor, and a peak position detecting means is included in the solid-state electronic image sensor. A peak position of a focus detection signal obtained from a plurality of sets of focus detection photoelectric conversion elements is detected before and after the movement of the focus lens, and the first determination means is detected by the peak position detection means. Whether the peak position of the focus detection signal before and after the movement of the focus lens has changed before and after the movement of the focus lens And the second determination means detects the peak position when the first determination means determines that the peak position of the focus detection signal before and after the movement of the focus lens has not changed. It is determined that the charge from the imaging photoelectric conversion element is leaking to the focus detection photoelectric conversion element at a position corresponding to the peak position detected by the means.

  According to the present invention, the focus lens is moved in the optical axis direction, and the peak positions of the focus detection signals obtained from the plurality of sets of focus detection photoelectric conversion elements are detected before and after the movement of the focus lens. The It is determined whether the peak position of the focus detection signal before and after the movement of the focus lens has changed. The focus detection signal obtained from the focus detection photoelectric conversion element changes its peak position as the amount of light incident on the focus detection photoelectric conversion element changes when the focus lens is moved. On the other hand, the peak position of the imaging signal obtained from the imaging photoelectric conversion element does not change even when the focus lens is moved. If the peak position of the focus detection photoelectric conversion signal obtained from the focus detection photoelectric conversion element does not change before and after the movement of the focus lens, the charge is transferred from the imaging photoelectric conversion element to the focus detection photoelectric conversion element. It means that it is leaking. It is determined that the charge from the imaging photoelectric conversion element is leaking to the focus detection photoelectric conversion element corresponding to the peak position of the focus detection photoelectric conversion signal. The position of the focus detection photoelectric conversion element where the charge leaks from the imaging photoelectric conversion element can be known relatively accurately.

  From the focus detection photoelectric conversion elements excluding the focus detection photoelectric conversion elements determined by the second determination means that the charge from the imaging photoelectric conversion elements is leaking in the plurality of sets of focus detection photoelectric conversion elements Focus control means for positioning the focus lens based on the obtained focus detection signal may be further provided.

  The acceleration detection means for detecting the acceleration of the solid-state electronic imaging device in response to the determination by the second determination means, and the acceleration detected by the acceleration detection means is greater than or equal to a predetermined threshold value In response to the above, the peak position detection means, the first determination means, and the determination process by the first determination means and the determination process by the second determination means are performed again. Control means for controlling the determination means and the second determination means may be further provided.

  You may further provide the blur amount detection means which detects the blur amount of a solid-state electronic imaging device before and after the movement of the first focus lens. In this case, the peak position detecting means includes, for example, a plurality of first focus detection signals obtained from a plurality of sets of focus detection photoelectric conversion elements before the movement of the focus lens and a plurality of movements after the focus lens is moved. A focus detection signal for correcting at least one focus detection signal out of the second focus detection signals obtained from the pair of focus detection photoelectric conversion elements using the shake amount detected by the shake amount detection means. Correction means are provided. Then, the peak positions of the first focus detection signal and the second focus detection signal corrected by the focus detection signal correction means will be detected.

  First focus detection signals obtained from a plurality of sets of focus detection photoelectric conversion elements before movement of the focus lens and first focus detection signals obtained from a plurality of sets of focus detection photoelectric conversion elements after movement of the focus lens. A difference signal for detecting a difference signal between at least one focus detection signal of the two focus detection signals and a third focus detection signal obtained from the focus detection photoelectric conversion element after the determination by the second determination means. Detected by the detection means, the difference signal detection means for detecting a difference signal from the third focus detection signal obtained from the focus detection photoelectric conversion element after the determination in the second determination means, and the difference signal detection means In response to the difference signal being greater than or equal to a predetermined threshold value, detection processing by the peak position detection means, determination processing by the first determination means, and the above To perform a determination process by the second judging means again, the peak position detecting unit may further comprise a control means for controlling the first judging means and the second judging means.

The light receiving surface of the CCD is shown. (A), (B), and (C) show the positional relationship between the focus lens and the CCD and the output of the focus detection photodiode. (A), (B), and (C) show the positional relationship between the focus lens and the CCD and the output of the focus detection photodiode. (A), (B), and (C) show the positional relationship between the focus lens and the CCD and the output of the focus detection photodiode. The relationship between the focus detection signal and the position of the focus detection photodiode is shown. The relationship between the focus detection signal and the position of the focus detection photodiode is shown. The relationship between the focus detection signal and the position of the focus detection photodiode is shown. It is a block diagram which shows the electric constitution of a digital camera. It is a flowchart which shows the process sequence of a digital camera. It is a flowchart which shows the process sequence of a digital camera. It is a flowchart which shows the process sequence of a digital camera. It is a flowchart which shows the process sequence of a digital camera. It is a flowchart which shows the process sequence of a digital camera. It is a flowchart which shows the process sequence of a digital camera.

  FIG. 1 shows an embodiment of the present invention and shows a light receiving surface of a CCD 3.

  A large number of photodiodes 1 and 2A and 2B are provided on the light receiving surface of the CCD 3. A large number of photodiodes 1 are arranged in the column direction and the row direction. The photodiode 1 is an imaging (recording) photodiode 1. A video signal (image data) obtained from the signal charge accumulated in the photodiode 1 is recorded on the memory card.

  Photodiodes 2A provided in the nth row and photodiodes 2B provided in the (n + 1) th row are focus detection photodiodes 2A and 2B. Each of these photodiodes 2A and 2B has a light shielding region (shown by hatching). In the focus detection photodiodes 2A in the n-th (n is a positive integer) row, the left area of the light receiving area of the photodiode 2A is a light shielding area. In the focus detection photodiode 2B in the (n + 1) th row, the right region of the light receiving region of the photodiode 2B is a light shielding region. A large number of pairs of focus detection photodiodes 2A and 2B, one photodiode 2A and one photodiode 2B, are provided in the column direction. Since the light shielding region of the focus detection photodiode 2A and the light shielding region of the focus detection photodiode 2B are relatively different from each other, depending on the position of the focus lens that is movable in the optical axis direction of the CCD 3 in front of the CCD 3 Thus, the amounts of light incident on the focus detection photodiodes 2A and 2B are different. Focus control is performed based on a focus detection signal obtained from signal charges accumulated in the focus detection photodiodes 2A and 2B.

  In FIG. 1, a large number of pairs of focus detection photodiodes 2A and 2B are arranged in the column direction, but may be arranged in the row direction.

  2A shows the positional relationship between the focus lens 4 and the CCD 3 when forming an image in front of the light receiving surface of the CCD 3, and FIG. 2B shows the output of the focus detection photodiode 2A. 2 (C) shows the output of the focus detection photodiode 2B. Similarly, FIG. 3A shows the positional relationship between the focus lens 4 and the CCD 3 when forming an image on the light receiving surface of the CCD 3, and FIG. 3B shows the output of the focus detection photodiode 2A. FIG. 3C shows the output of the focus detection photodiode 2B. 4A shows the positional relationship between the focus lens 4 and the CCD 3 when forming an image in the light receiving surface publication of the CCD 3, and FIG. 4B shows the output of the focus detection photodiode 2A. 4 (C) shows the output of the focus detection photodiode 2B.

  The focus detection photodiodes 2A and 2B are relatively different from each other in the positions of the light shielding regions in the photodiodes 2A and 2B. Therefore, as shown in FIG. When an image is formed, the amount of light incident on the focus detection photodiode 2A is different from the amount of light incident on the focus detection photodiode 2B. Therefore, the output peak position of the focus detection photodiode 2A as shown in FIG. 2B is different from the output peak position of the focus detection photodiode 2B as shown in FIG. 2C. On the other hand, as shown in FIG. 3A, when the subject image is increased on the light receiving surface of the CCD 3, the amount of light incident on the focus detection photodiodes 2A and 2B becomes equal. For this reason, the output peak position of the focus detection photodiode 2A as shown in FIG. 3B is equal to the output peak position of the focus detection photodiode 2B as shown in FIG. 3C. Also, as shown in FIG. 4A, when the subject image is increased behind the light receiving surface of the CCD 3, as shown in FIG. 4B, the output peak position of the focus detection photodiode 2A and FIG. As shown in (C), the output peak position of the focus detection photodiode 2B is different.

  When the position of the focus lens 4 is different, the output peak positions of the focus detection photodiodes 2A and 2B change.

  FIG. 5 shows a focus detection signal obtained from the focus detection photodiode 2A and a focus detection signal obtained from the focus detection photodiode 2B.

  A graph G1 shows a focus detection signal obtained from the focus detection photodiode 2A, and a graph G2 shows a focus detection signal obtained from the focus detection photodiode 2B. The horizontal axis represents the position of the focus detection photodiodes 2A and 2B in the column direction, and the vertical axis represents the level of the focus detection signal.

  FIG. 5 shows the state of the focus detection signal when the subject image is not in focus. By moving the focus lens 4 in the optical axis direction, the graphs G1 and G2 representing the focus detection signal approach each other. Or move away. The position of the focus lens 4 when these graphs G1 and G2 match is the position of the focus lens 4 at which the subject image is focused.

  In this manner, the graphs G1 and G2 representing the focus detection signals move to the left and right in FIG. 5 in accordance with the position of the focus lens 4.

  FIG. 6 shows the relationship between the focus detection signal obtained from the focus detection photodiode 2A (or 2B) and the position in the column direction of the focus detection photodiode 2A of the CCD 3, and the focus detection photodiode 2A. (2B) shows the relationship when the charge from the imaging photodiode 1 does not leak.

When the charge from the imaging photodiode 1 does not leak into the focus detection photodiode 2A (2B), if the focus lens 4 is moved as described above, the position of the peak value of the focus detection signal before and after the movement. Changes. For example, if the position in the column direction of the peak value P1 of the graph G11 indicating the focus detection signal before the movement of the focus lens 4 is the position x1, the graph indicating the focus detection signal after the movement of the focus lens 4 The position of the peak value P1 of G12 is changed to the position x2.

  FIG. 7 shows the relationship between the focus detection pixel signal obtained from the focus detection photodiode 2A (2B) and the position of the CCD 3 in the column direction of the focus detection photodiode 2A (2B). The relationship is shown when the charge from the imaging photodiode 1 leaks and enters the diode 2A (2B).

  When the charge from the imaging photodiode 1 leaks and enters the focus detection photodiodes 2A and 2B, the peak value changes due to an increase in the signal charge accumulated in the focus detection photodiodes 2A and 2B. Since the charge from the photo diode 1 is greatly affected by leakage, the position of the peak value does not change. For example, the peak value of the focus detection signal G21 before the movement of the focus lens 4 is P1, the position of the peak value P1 in the column direction is x1, and the focus detection signal G22 after the movement of the focus lens 4 is detected. The peak value of P3 is P3, and the position of the peak value P3 in the column direction is also x1.

  Thus, when there is a change in the position of the peak value of the focus detection signal before and after the movement of the focus lens 4, the signal charge leaks from the imaging photodiode 1 to the focus detection photodiodes 2 A and 2 B. It is judged that there is no. On the other hand, when there is no change in the position of the peak value of the focus detection signal before and after the movement of the focus lens 4, the imaging photodiode 1 to the focus detection photodiode 2A and It is determined that the signal charge leaked to 2B.

  FIG. 8 is a block diagram showing an electrical configuration of a digital camera (including a digital still camera, a movie digital camera, and a portable terminal having a digital camera function).

  The overall operation of the digital camera is controlled by the CPU 10.

  The digital camera includes a two-stroke type shutter release button 11. A signal S1 indicating the first-stage depression from the shutter release button 11 and a signal S2 indicating the second-stage depression are input to the CPU 10. The digital camera is also provided with a mode setting switch 12 for setting modes such as an imaging mode and a reproduction mode. A signal indicating the mode set by the mode setting switch 12 is also input to the CPU 10.

  The digital camera is also provided with a memory 13 for storing data and the like, an acceleration sensor 14 for detecting acceleration when the digital camera is moved, and a shake amount sensor 15 for detecting the shake amount of the digital camera. Output signals from the acceleration sensor 14 and the shake amount sensor 15 are also input to the CPU 10.

  As described above, the focus lens 4 that is movable in the optical axis direction of the CCD 3 is disposed in front of the CCD 3. The focus lens 4 is positioned by a focus control device 16.

  When the imaging mode is set, the subject is imaged by the CCD 3. As described above, the CCD 3 includes the imaging photodiode 1 and the focus detection photodiodes 2A and 2B. A video signal obtained based on the signal charges accumulated in the imaging photodiode 1 is output from the CCD 3 as a video signal representing a subject image. A signal obtained based on the signal charges accumulated in the focus detection photodiodes 2A and 2B is output from the CCD 3 as a focus detection signal. However, focus detection signals output from the photodiodes 2A and 2B may also be used as signals representing the subject image.

  The focus detection signal is input from the signal processing circuit 17 to the CPU 10, and the focus control amount is calculated so that the subject image formed by the focus lens 4 is focused on the light receiving surface of the CCD 3. The focus control device 16 is controlled based on the calculated focus control amount. Then, the focus lens 4 is positioned and focus control is performed.

  The video signal output from the CCD 3 is input to the signal processing circuit 17, and predetermined signal processing such as digital / analog conversion, gamma correction, and white balance correction is performed in the signal processing circuit 17. The image data output from the signal processing circuit 17 is given to the display device 19 via the display control device 18, whereby the subject image is displayed on the display screen of the display device 19.

  As will be described later, in this embodiment, when signal charges leaking from the imaging photodiode 1 are mixed into the focus detection photodiodes 2A and 2B, the focus detection photodiodes 2A and 2B are detected. A focus detection signal is generated without using the signal charges accumulated in the detected focus detection photodiodes 2A and 2B. A relatively accurate focus detection signal can be obtained.

  When the shutter release button 11 is first depressed, a signal S1 indicating the first depression is input to the CPU 10. Then, the focus detection signal output from the CCD 3 is input to the signal processing circuit 17 and focusing control is performed.

When the shutter release button 11 is depressed at the second stage, a signal S2 indicating the depression at the second stage is input to the CPU 10. Then, the image data output from the signal processing device 17 and representing the subject image is input to the recording control device 20 as described above. Image data representing the subject image is recorded on the memory card 21 by the recording control device 20.

  9 and 10 are flowcharts showing the processing procedure of the digital camera.

  The focus lens 4 is positioned at a predetermined position, the subject is imaged in the positioned state, and a focus detection signal (first focus detection signal) is read (step 20). Then, the focus lens 4 is moved in the optical axis direction (step 21). After the focus lens 4 is moved, the focus detection signal (second focus detection signal) is read again (step 22). Thus, the focus lens is moved, and the first focus detection signal and the second focus detection signal are obtained before and after the movement.

  The peak position (first peak position) is detected from the first focus detection signal (step 23), and the peak position (second peak position) is detected from the second focus detection signal (step 23). twenty four).

  As shown in FIG. 7, if the first peak position and the second peak position have not changed (YES in step 25), the focus detection photodiodes 2A and 2B at the peak position have no change. It is determined that the signal charge from the imaging photodiode 1 is mixed (step 27). On the other hand, as shown in FIG. 6, if the first peak position and the second peak position are changed (NO in step 25), the focus detection photodiode at the peak position is changed. It is assumed that 2A and 2B are not mixed with signal charges from the imaging photodiode 1 (step 26). Steps 25 to 27 are repeated for the number of peak positions.

  FIG. 11 is a flowchart showing a part of the processing procedure of the digital camera, and corresponds to the processing of FIG.

  As described above, if the peak position of the first focus detection signal and the peak position of the second focus detection signal do not change (YES in step 25), focus detection photodiodes 2A and 2B at the peak position are detected. Is determined as an unused photodiode for focus control (step 32). On the other hand, if the peak position of the first focus detection signal and the peak position of the second focus detection signal change (NO in step 25), focus detection photodiodes 2A and 2B at the peak position. Is determined as a photodiode used for focusing control (step 31).

  When the shutter release button 11 is first depressed (YES in step 33), a focus detection signal is read from the CCD 3 (step 34). As described above, of the focus detection photodiodes 2A and 2B, the signal charge accumulated in the photodiode determined to be an unused photodiode is not read (not included in the focus detection signal). Needless to say. Focus control is performed using the read focus detection signal (step 35). Since the focus detection photodiodes 2A and 2B in which signal charges are mixed from the imaging photodiode 1 are controlled based on the focus detection signals that are not used, the focus lens 11 can be moved relatively accurately. Can be positioned.

  FIG. 12 shows still another embodiment and is a flowchart showing a part of the processing procedure of the digital camera. In FIG. 12, the same processes as those shown in FIG.

  As described above, when the processing of steps 25 to 32 is repeated for the number of peak positions, the acceleration of the digital still camera is detected by the acceleration sensor 14 (step 41). If the detected acceleration is equal to or greater than a predetermined threshold value (YES in step 42), it is determined that the imaging target has been changed. Again, the first processing is repeated to find the positions of the focus detection photodiodes 2A and 2B in which signal charges are mixed from the imaging photodiode 1.

  FIG. 13 shows still another embodiment and is a flowchart showing the processing procedure of the digital camera. The process shown in FIG. 13 corresponds to the process shown in FIG. 9, and the same processes as those shown in FIG.

  As described above, when the first focus detection signal and the second focus detection signal are obtained before and after the movement of the focus lens 4, the blur amount before and after the movement of the focus lens 4 is detected by the shake amount sensor 15. It is detected (step 51). However, the blur amount may be detected from a video signal obtained from the CCD 3 or a focus detection signal.

  When the shake amount is obtained, the shake amount of the second focus detection signal (or the first focus detection signal may be used) is corrected using the obtained shake amount (step 52). From the first focus detection signal and the second focus detection signal whose blur amount is corrected, processing such as the presence or absence of a change in peak position is performed as described above. Since the blur amount of the second focus detection signal is corrected, the peak position can be detected relatively accurately.

  FIG. 14 shows still another embodiment and is a flowchart showing the processing procedure of the digital camera. FIG. 14 corresponds to FIG. 11, and the same processes as those shown in FIG.

  As described above, when the photodiodes used for focus control and the photodiodes not used for focus control are determined among the focus detection photodiodes 2A and 2B, first, the second focus detection photodiodes are determined. The signal is stored (step 61). Then, a focus detection signal (third focus detection signal) obtained based on the signal charges newly accumulated in the focus detection photodiodes 2A and 2B is read from the CCD 3 (step 62).

  A difference value between the read third focus detection signal and the stored second focus detection signal is calculated. If the calculated difference value is equal to or greater than the predetermined threshold value (YES in step 63), it is considered that the imaging target has changed. As described above, the processing from step 21 is performed. If the calculated difference value is not equal to or greater than the predetermined threshold value (NO in step 63), the imaging target has not changed, and thus focus control is performed using the obtained focus detection signal.

1 Photodiode for image pickup 2A, 2B Photodiode for focus detection 3 CCD
4 Focus lens
10 CPU

Claims (6)

A solid-state electronic image sensor comprising a plurality of pairs of focus detection photoelectric conversion elements, and a plurality of imaging photoelectric conversion elements arranged in a row direction and a column direction;
A focus lens that is movable in the optical axis direction of the solid-state electronic image sensor in front of the light-receiving surface of the solid-state electronic image sensor;
A peak position detecting means for detecting a peak position of a focus detection signal obtained from a plurality of pairs of focus detection photoelectric conversion elements included in the solid-state electronic image sensor before and after the movement of the focus lens;
First determination means for determining whether or not a peak position of the focus detection signal detected by the peak position detection means before and after the movement of the focus lens has changed before and after the movement of the focus lens; and A position corresponding to the peak position detected by the peak position detecting means when the first determining means determines that the peak position of the focus detection signal before and after the movement of the focus lens has not changed. Second determination means for determining that the charge from the photoelectric conversion element for imaging leaks into the photoelectric conversion element for focus detection in
A solid-state electronic imaging device. From the focus detection photoelectric conversion elements excluding the focus detection photoelectric conversion elements determined by the second determination means that the charge from the imaging photoelectric conversion elements is leaking in the plurality of sets of focus detection photoelectric conversion elements Focusing control means for positioning the focus lens based on a focus detection signal obtained;
The solid-state electronic imaging device according to claim 1, further comprising: An acceleration detecting means for detecting an acceleration of the solid-state electronic imaging device in response to the determination by the second determining means, and the acceleration detected by the acceleration detecting means is equal to or greater than a predetermined threshold value. In response to the above, the peak position detection means, the first determination means, and the determination process by the first determination means and the determination process by the second determination means are performed again. Control means for controlling the judging means and the second judging means;
The solid-state electronic imaging device according to claim 1, further comprising: A shake amount detecting means for detecting a shake amount of the solid-state electronic imaging device before and after the movement of the first focus lens;
The peak position detecting means is
First focus detection signals obtained from a plurality of sets of focus detection photoelectric conversion elements before movement of the focus lens and first focus detection signals obtained from a plurality of sets of focus detection photoelectric conversion elements after movement of the focus lens. A focus detection signal correction unit that corrects at least one focus detection signal of the two focus detection signals using the blur amount detected by the blur amount detection unit;
The position of each peak of the first focus detection signal and the second focus detection signal corrected by the focus detection signal correction means is detected.
The solid-state electronic imaging device according to any one of claims 1 to 3. First focus detection signals obtained from a plurality of sets of focus detection photoelectric conversion elements before movement of the focus lens and first focus detection signals obtained from a plurality of sets of focus detection photoelectric conversion elements after movement of the focus lens. A difference signal for detecting a difference signal between at least one focus detection signal of the two focus detection signals and a third focus detection signal obtained from the focus detection photoelectric conversion element after the determination by the second determination means. Detection means,
A difference signal detection means for detecting a difference signal from a third focus detection signal obtained from the focus detection photoelectric conversion element after the determination in the second determination means; and a difference signal detected by the difference signal detection means In response to being above a predetermined threshold value, the detection processing by the peak position detection means, the determination processing by the first determination means, and the determination processing by the second determination means are performed again. Control means for controlling the peak position detection means, the first determination means and the second determination means;
The solid-state electronic imaging device according to claim 1, further comprising: Operation control of a solid-state electronic image pickup apparatus including a solid-state electronic image pickup element including a plurality of sets of focus detection photoelectric conversion elements and a plurality of image pickup photoelectric conversion elements arranged in a row direction and a column direction In the method,
A focus lens is movable in the optical axis direction of the solid-state electronic image sensor in front of the light-receiving surface of the solid-state electronic image sensor;
Peak position detection means detects the peak positions of focus detection signals obtained from a plurality of sets of focus detection photoelectric conversion elements included in the solid-state electronic image sensor before and after the movement of the focus lens,
A first determination unit for determining whether or not the peak position of the focus detection signal before and after the movement of the focus lens detected by the peak position detection unit has changed before and after the movement of the focus lens;
The second determination means is detected by the peak position detection means when the first determination means determines that the peak position of the focus detection signal before and after the movement of the focus lens has not changed. Determining that the charge from the imaging photoelectric conversion element is leaking to the focus detection photoelectric conversion element at a position corresponding to the peak position.
Operation control method of solid-state electronic imaging device.

Images