Image sensors, electronic devices, control methods, and readable storage media

Abstract

This application discloses an image sensor, an electronic device, a control method, and a readable storage medium, belonging to the field of imaging technology. The image sensor provided in this application includes: a photosensitive pixel for generating an electrical signal during exposure; a first readout circuit connected to a first end of the photosensitive pixel via a first switch module, the first readout circuit being used to read and output a first electrical signal from the first end of the photosensitive pixel; and a second readout circuit connected to a second end of the photosensitive pixel via a second switch module, the second readout circuit being used to read and output a second electrical signal from the second end of the photosensitive pixel; wherein, when the photosensitive pixel has completed exposure, the first switch module and the second switch module are turned on, causing the first readout circuit to read and output the first electrical signal, and causing the second readout circuit to read and output the second electrical signal; the first and second electrical signals are electrical signals generated by the photosensitive pixel during a single exposure.

Description

Technical Field

[0001] This application belongs to the field of imaging technology, specifically relating to an image sensor, electronic device, control method, and readable storage medium. Background Technology

[0002] Typically, an image sensor in an electronic device includes photosensitive pixels and a readout circuit. During the process of taking a picture using the image sensor, once the photosensitive pixels have completed exposure, the electrical signal generated by the photosensitive pixels during exposure can be read by the readout circuit and output to other components of the image sensor (such as an image signal processor). The image signal processor can then perform shooting-related operations based on this electrical signal, such as determining focus position information and generating image signals.

[0003] However, since only a limited number of electrical signals generated by the photosensitive pixels during each exposure can be read by the readout circuit, this may result in limited signals being received by other components of the image sensor. Consequently, these other components may be unable to accurately perform shooting-related operations, leading to poor shooting performance of the electronic device. Summary of the Invention

[0004] The purpose of this application is to provide an image sensor, electronic device, control method, and readable storage medium that can solve the problem of poor shooting performance of electronic devices.

[0005] In a first aspect, embodiments of this application provide an image sensor, comprising: a photosensitive pixel for generating an electrical signal during exposure; a first readout circuit connected to a first end of the photosensitive pixel via a first switching module, the first readout circuit being used to read and output a first electrical signal from the first end of the photosensitive pixel; and a second readout circuit connected to a second end of the photosensitive pixel via a second switching module, the second readout circuit being used to read and output a second electrical signal from the second end of the photosensitive pixel; wherein, when the photosensitive pixel has completed exposure, the first switching module and the second switching module are turned on, so that the first readout circuit reads and outputs the first electrical signal, and the second readout circuit reads and outputs the second electrical signal; the first electrical signal and the second electrical signal are electrical signals generated by the photosensitive pixel during a single exposure.

[0006] Secondly, embodiments of this application provide an electronic device comprising: an image sensor as described in the first aspect.

[0007] Thirdly, embodiments of this application provide a control method applied to an electronic device as described in the second aspect. The method includes: when the photosensitive pixel of the image sensor of the electronic device has completed exposure, turning on a first switching module of the image sensor to read and output a first electrical signal at the first end of the photosensitive pixel through a first reading circuit of the image sensor; turning on a second switching module of the image sensor to read and output a second electrical signal at the second end of the photosensitive pixel through a second reading circuit of the image sensor; wherein the first electrical signal and the second electrical signal are electrical signals generated by a single exposure of the photosensitive pixel.

[0008] Fourthly, embodiments of this application provide an electronic device including a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions, when executed by the processor, implementing the steps of the method described in the third aspect.

[0009] Fifthly, embodiments of this application provide a readable storage medium on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the third aspect.

[0010] In a sixth aspect, embodiments of this application provide a chip, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the method as described in the third aspect.

[0011] In a seventh aspect, embodiments of this application provide a computer program product stored in a storage medium, which is executed by at least one processor to implement the method described in the third aspect.

[0012] In this embodiment, since the image sensor is equipped with a first reading circuit and a second reading circuit, i.e., multiple reading circuits are provided, and these multiple reading circuits can read and output electrical signals from multiple ends of the photosensitive pixel respectively, when the photosensitive pixel completes each exposure, a portion of the electrical signal generated by the photosensitive pixel can be read by the first reading circuit at the first end of the photosensitive pixel and output as a first electrical signal, and another portion of the electrical signal generated by the photosensitive pixel can be read by the second reading circuit at the second end of the photosensitive pixel and output as a second electrical signal. That is, a larger portion of the electrical signal generated by the photosensitive pixel after each exposure can be read by both the first and second reading circuits. Therefore, other components can receive a larger portion of the electrical signal generated by the photosensitive pixel after each exposure, thereby enabling these other components to accurately perform operations related to shooting, thus improving the shooting performance of the electronic device. Attached Figure Description

[0013] Figure 1AThis is one of the structural schematic diagrams of an image sensor in related technologies;

[0014] Figure 1B This is a structural diagram of a camera module in related technologies;

[0015] Figure 1C This is the second schematic diagram of the structure of an image sensor in related technologies;

[0016] Figure 1D This is the third schematic diagram of the structure of an image sensor in related technologies;

[0017] Figure 1E This is a schematic diagram of the circuit structure of an image sensor in related technologies;

[0018] Figure 2 This is one of the circuit structure diagrams of the image sensor provided in the embodiments of this application;

[0019] Figure 3 This is a second schematic diagram of the circuit structure of the image sensor provided in the embodiments of this application;

[0020] Figure 4A This is the third schematic diagram of the circuit structure of the image sensor provided in the embodiments of this application;

[0021] Figure 4B This is one of the schematic diagrams of the focusing unit of the image sensor provided in the embodiments of this application;

[0022] Figure 5A This is the fourth schematic diagram of the circuit structure of the image sensor provided in the embodiments of this application;

[0023] Figure 5B This is a second schematic diagram of the area of ​​the focusing unit of the image sensor provided in the embodiments of this application;

[0024] Figure 6 This is the fifth schematic diagram of the circuit structure of the image sensor provided in the embodiments of this application;

[0025] Figure 7 This is the sixth schematic diagram of the circuit structure of the image sensor provided in the embodiments of this application;

[0026] Figure 8 This is the seventh schematic diagram of the circuit structure of the image sensor provided in the embodiments of this application;

[0027] Figure 9 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application;

[0028] Figure 10 This is one of the flowcharts illustrating the control method provided in the embodiments of this application;

[0029] Figure 11 This is a second schematic flowchart of the control method provided in the embodiments of this application;

[0030] Figure 12 This is one of the hardware structure diagrams of the electronic device provided in the embodiments of this application;

[0031] Figure 13 This is the second schematic diagram of the hardware structure of the electronic device provided in the embodiments of this application.

[0032] Figure label:

[0033] 1-Pixel unit, 2-Pixel unit, 3-Pixel unit, 4-Pixel unit, 5-Lens group, 6-Voice coil motor, 7-Base, 8-Filter, 9-Image sensor, 10-Photosensitive pixel, 101-First part of pixel unit, 102-Second part of pixel unit, 103-Third part of pixel unit, 104-Fourth part of pixel unit, 11-First readout circuit, 111-First capacitor, 112-First amplifier, 12-First switching module, 121-First switching transistor, 122-Second switching transistor, 123-Third switching transistor, 13-Second readout circuit, 131-Second capacitor, 132-Second amplifier, 14-Second switching module, 141-Fourth switching transistor, 142-Fifth switching transistor, 15-Concentrating unit, 151-The first... 152-Second center line, 16-First region, 17-Second region, 18-Third region, 19-Fourth region, 20-Signal processing unit, 21-Switch transistor, 22-Switch transistor, 23-Switch transistor, 24-Switch transistor, 25-Sixth switch transistor, 26-First power supply, 27-Seventh switch transistor, 28-Second power supply, 29-Third switch module, 30-Electronic device, 31-Image sensor, 200-OCL array, 2001-OCL, 2002-OCL, 2003-OCL, 2004-OCL, 201-Color filter array, 202-Photosensitive pixel array, 2021-Photosensitive pixel, 2022-Photosensitive pixel, 2023-Photosensitive pixel, 2024-Photosensitive pixel, 203-Conversion circuit. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0035] The terminology used in the embodiments of this application will be explained below.

[0036] 1. Focusing Operation

[0037] Typically, camera modules in electronic devices are divided into fixed-focus camera modules and zoom camera modules. Fixed-focus camera modules refer to camera modules that cannot change their focal length, having only one fixed focal length. For example, 50mm f / 1.8 is a fixed-focus camera module with a 50mm focal length. Zoom camera modules refer to camera modules whose lenses can rotate to change their focal length, such as 24-105mm or 18-200mm, etc. Modules with two numbers are zoom camera modules.

[0038] Focusing is a photographic term referring to adjusting the focal distance before taking a picture using the camera module to ensure a sharp image. The basic principle is that by moving the lens elements within the camera module back and forth, the image distance is changed, ensuring the image falls precisely on the photosensitive pixels of the image sensor.

[0039] 2. Phase Detection Auto Focus (PDAF) method

[0040] Currently, the PDAF method is used to determine whether a focusing operation is successful. Typically, an on-chip lens (OCL) covers the photosensitive pixels of an image sensor. Each OCL covers a photosensitive pixel of one color, and this photosensitive pixel can be divided into four pixel units. Therefore, taking one photosensitive pixel covered by one OCL as an example... Figure 1A As shown, the electronic device can employ the PDAF method, first acquiring the electrical signal 1 output from the exposure of pixel unit 1 and pixel unit 2, and then acquiring the electrical signal 2 output from the exposure of pixel unit 3 and pixel unit 4, and determining the phase difference information based on these electrical signals 1 and 2; or, first acquiring the electrical signal 3 output from the exposure of pixel unit 1 and pixel unit 3, and then acquiring the electrical signal 4 output from the exposure of pixel unit 2 and pixel unit 4, and determining the phase difference information based on these electrical signals 3 and 4. Then, based on this phase difference information, the focal plane where the focus point is located is determined, and based on this focal plane, the lens of the camera module is driven to move, thereby achieving the focusing operation. It should be noted that in... Figure 1A The OCL is illustrated in the middle with a dashed box.

[0041] 3. Camera module

[0042] Usually, such as Figure 1B As shown, the camera module includes a lens group 5, a voice coil motor 6, a base 7, a filter 8, and an image sensor 9. The lens group 5 is disposed in the voice coil motor 6, the voice coil motor 6 is disposed on the base 7, the image sensor 9 is disposed in the base 7, and the filter 8 is disposed on the image sensor 9.

[0043] The lens assembly 5 is used for light focusing and is enclosed and fixed by a voice coil motor 6, whose upper and lower ends are connected to spring contacts. During focusing, an electric current is applied to the voice coil motor 6 to generate an electromagnetic force, which ultimately balances the elastic force of the spring contacts. The position of the voice coil motor 6 can be controlled by the amount of current applied, thus pushing the voice coil motor 6 and the lens assembly 5 to the focused position. The light rays from the scene entering the camera module pass through the lens assembly 5 and are projected onto a filter 8. The filter 8 filters out unnecessary light rays projected onto the image sensor 9, preventing false colors / ripples from appearing on the image sensor 9, thereby improving its effective resolution and color reproduction. The light rays after passing through the filter 8 can then be sensed by the image sensor 9. The photosensitive pixels in the image sensor 9 can then output electrical signals. These electrical signals are processed by the image signal processor in the image sensor 9 to obtain an image signal, which can then be used to generate an image.

[0044] 4. Image sensor

[0045] Usually, such as Figure 1C As shown, the image sensor may include an OCL array 200, a color filter array 201, a photosensitive pixel array 202, and a conversion circuit 203. The OCL array 200 is disposed on the color filter array 201, which is disposed on the photosensitive pixel array 202. The photosensitive pixel array 202 is connected to the conversion circuit 203. The photosensitive pixel array 202 may include at least one photosensitive pixel, which can convert light passing through the color filter array 201 into an electrical signal. The conversion circuit can convert this electrical signal (i.e., an analog signal) into a digital signal, which can then be processed by an image signal processor. The OCL array 200 may include at least one OCL, each located on a photosensitive pixel. The function of the OCL is to concentrate light onto the corresponding photosensitive pixel. The color filter array 201 may include at least one color filter, each of which allows only red, green, or blue light to pass through, and each filter may be located on a photosensitive pixel.

[0046] The color filters in the aforementioned color filter array 201 can be arranged in various ways, such as the Bayer arrangement, the four-in-one arrangement, the nine-in-one arrangement, the sixteen-in-one arrangement, etc.

[0047] Taking the four-in-one arrangement as an example, such as Figure 1DAs shown, the photosensitive pixel array 202 may include four photosensitive pixels, such as photosensitive pixel 2021, photosensitive pixel 2022, photosensitive pixel 2023 and photosensitive pixel 2024. Photosensitive pixel 2021 may be composed of four pixel units, such as R1, R2, R3 and R4. Photosensitive pixel 2022 may be composed of four pixel units, such as Gr1, Gr2, Gr3 and Gr4. Photosensitive pixel 2023 may be composed of four pixel units, such as Gb1, Gb2, Gb3 and Gb4. Photosensitive pixel 2024 may be composed of four pixel units, such as B1, B2, B3 and B4. The color filter array 201 may include four color filters, such as filter A, filter B, filter C, and filter D. Filter A allows only red light to pass through, filter B allows only green (Gr) light to pass through, filter C allows only green (Gb) light to pass through, and filter D allows only blue light to pass through. The OCL array 200 includes four OCLs, such as OCL2001, OCL2002, OCL2003, and OCL2004. OCL2001 is located above filter A, OCL2002 is located above filter B, OCL2003 is located above filter C, and OCL2004 is located above filter D. Thus, OCL2001 can focus light onto the photosensitive pixel 2021, filter A can filter out light except for red light, and the photosensitive pixel 2021 can output the electrical signal corresponding to red light. OCL2002 focuses light onto photosensitive pixel 2022, and color filter B filters out light except for green (Gr). Photosensitive pixel 2022 can output the electrical signal corresponding to green (Gr) light. OCL2003 focuses light onto photosensitive pixel 2023, and color filter C filters out light except for green (Gb). Photosensitive pixel 2023 can output the electrical signal corresponding to green (Gb) light. OCL2004 focuses light onto photosensitive pixel 2024, and color filter D filters out light except for blue. Photosensitive pixel 2024 can output the electrical signal corresponding to blue light.

[0048] 5. Other terms

[0049] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0050] The terms "at least one," "at least one of," etc., used in the specification and claims of this application refer to any one, any two, or a combination of two or more of the included items. For example, at least one of a, b, and c can mean: "a," "b," "c," "a and b," "a and c," "b and c," and "a, b, and c," where a, b, and c can be single or multiple. Similarly, "at least two" refers to two or more items, and its meaning is similar to that of "at least one."

[0051] In related technologies, an image sensor in an electronic device includes photosensitive pixels and a readout circuit. The number of photosensitive pixels is at least one. For example, if the number of photosensitive pixels is one, and the photosensitive pixel includes a pixel unit (PD), then... Figure 1E As shown, the readout circuit may include a capacitor FD, an amplifier SF, and a line selector SET. During image sensor capture, once the photosensitive pixel has completed exposure, the electrical signal generated by the pixel during exposure can be stored in the capacitor FD. This signal is then amplified by the amplifier SF and output to the image signal processor via the line selector SET. The image signal processor can then process this electrical signal, for example, using the PDAF method described above to determine the phase difference information, and based on this phase difference information, determine the focal plane where the focus point is located. Based on this focal plane, it can drive the camera module's lens to move, thereby achieving focusing. Alternatively, the image signal processor can process this electrical signal to generate an image signal, thus performing image signal generation operations, etc.

[0052] However, because the electrical signal generated by the photosensitive pixel during each exposure is limited and can only be read by the capacitor FD, amplifier SF, and line selector SET (e.g., only the signal from the negative terminal of the photosensitive pixel can be read), for example, combined with... Figure 1AWhen a photosensitive pixel completes one exposure, the capacitor FD, amplifier SF, and line selector SET can read the electrical signal A output from the exposure of pixel units 1 and 2, and the electrical signal B output from the exposure of pixel units 3 and 4; or, they can read the electrical signal C output from the exposure of pixel units 1 and 3, and the electrical signal D output from the exposure of pixel units 2 and 4. Thus, the image signal processor of the electronic device can determine the phase difference information based on electrical signals A and B, or based on electrical signals C and D. That is, the image signal processor determines the phase difference information based on fewer signals, which may result in less phase difference information being determined. Consequently, the focal plane at which the electronic device determines the focus based on this less phase difference information may be inaccurate, leading to poor focusing accuracy. Alternatively, when a photosensitive pixel completes one exposure, the capacitor FD, amplifier SF, and line selector SET can read the electrical signal E output from pixel units 1, 2, 3, and 4. In this way, the image signal processor can generate an image signal based on the electrical signal E. However, this means the image signal processor can generate an image signal based on a relatively small amount of signal. Consequently, the image signal generated by the image signal processor may contain more noise, resulting in poor image quality when the electronic device performs the image signal generation operation. This leads to poor shooting performance of the electronic device.

[0053] The image sensor, electronic device, control method, and readable storage medium provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0054] To address the aforementioned problems in related technologies, this application provides an image sensor. Figure 2 A schematic diagram of the structure of an image sensor provided in an embodiment of this application is shown. Figure 2 As shown, the image sensor provided in this application embodiment may include: a photosensitive pixel 10 for generating an electrical signal during exposure; a first readout circuit 11, which is connected to a first end of the photosensitive pixel 10 via a first switch module 12, and is used to read and output a first electrical signal from the first end of the photosensitive pixel 10; and a second readout circuit 13, which is connected to a second end of the photosensitive pixel 10 via a second switch module 14, and is used to read and output a second electrical signal from the second end of the photosensitive pixel 10.

[0055] In some embodiments of this application, the photosensitive pixel 10 can be... Figure 1DThe photosensitive pixel array 202 contains any photosensitive pixel, and the number of photosensitive pixels 10 can be at least one. Each photosensitive pixel 10 may have a light-gathering unit disposed above it, and this light-gathering unit can be... Figure 1D The OCL array 200 in the OCL array is located above the photosensitive pixel 10, and each photosensitive pixel 10 may include at least two pixel units.

[0056] A color filter can be set above the photosensitive pixel 10, and this color filter can be... Figure 1D The color filter in the color filter array 201 is located above the photosensitive pixel 10. It can be understood that the photosensitive pixel 10 includes at least two pixel units that can receive light of the same color during exposure.

[0057] In some embodiments of this application, the first switch module 12 may include at least one switch transistor, as illustrated below.

[0058] In some embodiments of this application, the photosensitive pixel 10 includes at least two pixel units. In some examples, combined with Figure 2 ,like Figure 3 As shown, the first switch module 12 includes at least two first switch transistors 121, the first end of each first switch transistor 121 being connected to the first end of a pixel unit, and the second end of the first switch transistor 121 being connected to the first reading circuit 11.

[0059] It should be noted that, Figure 3 The diagram is illustrated using at least two pixel units, including four pixel units (i.e., PD1, PD2, PD3, and PD4).

[0060] It can be understood that the first end of the aforementioned pixel unit can be equivalent to the first end of the photosensitive pixel 10.

[0061] In some embodiments of this application, the first terminal of the first switching transistor 121 can be the source terminal. The second terminal of the first switching transistor 121 can be the drain terminal.

[0062] In some embodiments of this application, the third terminal of the first switching transistor 121 can also be connected to a control unit, thereby allowing the control unit to control the on / off state of the first switching transistor 121. The control unit can be any of the following: a central processing unit (CPU), a microprocessor (MCU), etc. The third terminal of the first switching transistor 121 can be the gate terminal.

[0063] In some embodiments of this application, the second end of the first switching transistor 121 can be directly connected to the first reading circuit 11, or the second end of the first switching transistor 121 can be connected to the first reading circuit 11 through other components (such as switching transistors).

[0064] In some embodiments of this application, the aforementioned pixel unit may specifically be a photodiode (PD).

[0065] In some embodiments of this application, the first end of the pixel unit can be a negative electrode. It is understood that during exposure, negative electrons in the pixel unit can move towards the first end of the pixel unit, and holes in the pixel unit can move towards the second end of the pixel unit. The second end of the pixel unit can be a positive electrode.

[0066] Thus, since the photosensitive pixel includes at least two pixel units, the first switching module can also include at least two first switching transistors. In this way, each pixel unit can be connected to the first reading circuit through a first switching transistor. Therefore, during use, the required first switching transistor can be turned on as needed, so that the first reading circuit can read the electrical signal of the required pixel unit, instead of reading the electrical signals of all pixel units, thereby improving the flexibility of reading the electrical signals of pixel units.

[0067] For the case where the second terminal of the first switching transistor 121 can be connected to the first reading circuit 11 through other components (e.g., switching transistors):

[0068] In some embodiments of this application, combined with Figure 3 ,like Figure 4A and Figure 4B As shown, the image sensor provided in this embodiment may further include a light-concentrating unit 15, which is used to converge light onto the photosensitive pixel 10 during exposure; the projection of a first portion of pixel unit 101 of at least two pixel units onto the light-concentrating unit 15 is located in a first region 16, and the projection of a second portion of pixel unit 102 of at least two pixel units onto the light-concentrating unit 15 is located in a second region 17, the first region 16 and the second region 17 being symmetrically distributed on both sides of the first center line 151 of the light-concentrating unit 15. The aforementioned first switching module 12 further includes: a second switching transistor 122, the first end of which is connected to the second end of the first switching transistor 121 connected to the first portion of pixel unit 101, and the second end of which is connected to the first reading circuit 11; and a third switching transistor 123, the first end of which is connected to the second end of the first switching transistor 121 connected to the second portion of pixel unit 102, and the second end of which is connected to the first reading circuit 11.

[0069] In some embodiments of this application, the aforementioned focusing unit 15 may specifically be... Figure 1D The OCL in the OCL array 200 is located above the photosensitive pixel 10.

[0070] In some embodiments of this application, the first region 16 may be located on a first side of the first centerline 151, and the first region 16 may be at least a portion of the region on the first side of the first centerline 151. The first side of the first centerline 151 may be... Figure 4B The upper side of the middle.

[0071] In some embodiments of this application, the second region 17 may be located on the second side of the first centerline 151, and the second region 17 may be at least a portion of the region on the second side of the first centerline 151. The second side of the first centerline 151 may be... Figure 4B The lower side of the middle.

[0072] In some embodiments of this application, when the first region 16 is a part of the region on the first side of the first center line 151 and the second region 17 is a part of the region on the second side of the first center line 151, the distance from the first region 16 to the first center line 151 is the same as the distance from the second region 17 to the first center line 151.

[0073] In some embodiments of this application, the area size of the first region 16 may be the same as the area size of the second region 17.

[0074] In this embodiment of the application, the first pixel unit 101 can be at least one of at least two pixel units, and the second pixel unit 102 can be at least one of at least two pixel units, and the first pixel unit 101 and the second pixel unit 102 are different.

[0075] In some embodiments of this application, the first terminal of the first pixel unit 101 can be connected to the first terminal of the second switch 122. The first terminal of the first pixel unit 101 can be the negative terminal, the first terminal of the second switch 122 can be the source terminal, and the second terminal of the second switch 122 can be the drain terminal. The third terminal of the second switch 122 can also be connected to a control unit, thereby allowing the control unit to control the switching on and off of the second switch 122. The third terminal of the second switch 122 can be the gate terminal.

[0076] In some embodiments of this application, the first end of the second pixel unit 102 can be connected to the first end of the third switch 123. The first end of the second pixel unit 102 can be the negative terminal, the first end of the third switch 123 can be the source terminal, and the second end of the third switch 123 can be the drain terminal. The third end of the third switch 123 can also be connected to a control unit, thereby allowing the control unit to control the switching on and off of the third switch 123. The third end of the third switch 123 can be the gate terminal.

[0077] In this embodiment, since determining the focal plane of the focal point using the PDAF method requires calculating phase difference information based on the electrical signals generated by symmetrically distributed pixel units, a second switch 122 and a third switch 123 can be configured in the first switch module 12. During use, the second switch 122 can be turned on to open the path between the first pixel unit 101 and the first reading circuit 11, allowing the first reading circuit 11 to read the electrical signal generated by the negative terminal of the first pixel unit 101. The third switch 123 is then turned on to open the path between the second pixel unit 102 and the first reading circuit 11, allowing the first reading circuit 11 to read the electrical signal generated by the negative terminal of the second pixel unit 102. Thus, the first reading circuit 11 can output the electrical signals generated by the negative terminals of the first and second pixel units 101, enabling the image signal processor to accurately calculate the phase difference information based on these two electrical signals.

[0078] Furthermore, when it is necessary to obtain the electrical signals generated by the negative terminals of the first part of pixel unit 101 and the second part of pixel unit 102, the second switch 122 and the third switch 123 can be directly turned on. In this way, the electrical signals generated by the negative terminals of the first part of pixel unit 101 and the second part of pixel unit 102 can be read simultaneously by the first reading circuit 11, so as to accurately obtain the electrical signals generated by the negative terminals of the first part of pixel unit 101 and the second part of pixel unit 102.

[0079] Thus, since a second and a third switch can be set in the first switch module, and the second and third switch are respectively connected to different pixel units on both sides of the first center line of the symmetrical part and the focusing unit, when it is necessary to obtain the electrical signals generated by the different pixel units, the second and third switch can be turned on respectively to obtain the electrical signals generated by the different pixel units without the need for the image signal processor to perform additional calculations. Therefore, the amount of calculation required to obtain the electrical signals generated by the different pixel units can be reduced.

[0080] In some embodiments of this application, the second switching module 14 may include at least one switching transistor.

[0081] In some embodiments of this application, combined with Figure 4A and Figure 4B ,like Figure 5A and Figure 5BAs shown, the image sensor provided in this embodiment further includes a light-concentrating unit 15, which is used to converge light onto the photosensitive pixel 10 during exposure. The projection of the third portion of the pixel unit 103, one of the at least two pixel units, onto the light-concentrating unit 15 is located in the third region 18, and the projection of the fourth portion of the pixel unit 104, one of the at least two pixel units, onto the light-concentrating unit 15 is located in the fourth region 19. The third region 18 and the fourth region 19 are symmetrically distributed on both sides of the second center line 152 of the light-concentrating unit 15. The second switching module 14 includes: a fourth switching transistor 141, the first end of which is connected to the third portion of the pixel unit 103, and the second end of which is connected to the second readout circuit 13; and a fifth switching transistor 142, the first end of which is connected to the fourth portion of the pixel unit 104, and the second end of which is connected to the second readout circuit 13.

[0082] In some embodiments of this application, the included angle between the second centerline 152 and the first centerline 151 is not 0. For example, the included angle can be 90°, that is, the second centerline 152 and the first centerline 151 can be perpendicular.

[0083] In some embodiments of this application, the third region 18 may be located on the first side of the second centerline 152, and the third region 18 may be at least a portion of the region on the first side of the second centerline 152. The first side of the second centerline 152 may be... Figure 5B On the left side of the middle.

[0084] In some embodiments of this application, the fourth region 19 may be located on the second side of the second centerline 152, and the fourth region 19 may be at least a portion of the region on the second side of the second centerline 152. The second side of the second centerline 152 may be... Figure 5B On the right side of the middle.

[0085] In some embodiments of this application, when the third region 18 is a part of the region on the first side of the second center line 152 and the fourth region 19 is a part of the region on the second side of the second center line 152, the distance from the third region 18 to the second center line 152 is the same as the distance from the fourth region 19 to the second center line 152.

[0086] In some embodiments of this application, the size of the third region 18 may be the same as the size of the fourth region 19. The third region 18 may or may not overlap with the first region 16 and the second region 17. The fourth region 19 may or may not overlap with the first region 16 and the second region 17.

[0087] In some embodiments of this application, the first end of the third pixel unit 103 can be connected to the first end of the fourth switch 141. The first end of the third pixel unit 103 can be the negative terminal, the first end of the fourth switch 141 can be the source terminal, and the second end of the fourth switch 141 can be the drain terminal. The third end of the fourth switch 141 can also be connected to a control unit, thereby allowing the control unit to control the switching on and off of the fourth switch 141. The third end of the fourth switch 141 can be the gate terminal.

[0088] In some embodiments of this application, the first end of the fourth pixel unit 104 can be connected to the first end of the fifth switch 142. The first end of the fourth pixel unit 104 can be the negative terminal, the first end of the fifth switch 142 can be the source terminal, and the second end of the fifth switch 142 can be the drain terminal. The third end of the fifth switch 142 can also be connected to a control unit, thereby allowing the control unit to control the switching on and off of the fifth switch 142. The third end of the fifth switch 142 can be the gate terminal.

[0089] In this embodiment of the application, the third pixel unit 103 can be at least one of at least two pixel units, and the fourth pixel unit 104 can be at least one of at least two pixel units. The third pixel unit 103 and the fourth pixel unit 104 are different. The third pixel unit 103 can be the same as at least some of the pixel units in the first pixel unit 101, the third pixel unit 103 can be the same as at least some of the pixel units in the second pixel unit 102, the fourth pixel unit 104 can be the same as at least some of the pixel units in the first pixel unit 101, and the fourth pixel unit 104 can be the same as at least some of the pixel units in the second pixel unit 102.

[0090] In the case where the third pixel unit 103 is the same as at least some of the pixel units in the first pixel unit 101, and the third pixel unit 103 is the same as at least some of the pixel units in the second pixel unit 102, since the first reading circuit 11 reads the electrical signal generated by the negative terminal of the pixel unit, and the second reading circuit 13 reads the electrical signal generated by the positive terminal of the pixel unit, that is, the first reading circuit 11 and the second reading circuit 13 read electrical signals generated by different terminals, the first reading circuit 11 and the second reading circuit 13 can accurately read the electrical signals generated by the third pixel unit 103, the first pixel unit 101 and the second pixel unit 102.

[0091] When the fourth pixel unit 104 is the same as at least some of the pixel units in the first pixel unit 101, and the fourth pixel unit 104 is the same as at least some of the pixel units in the second pixel unit 102, since the first reading circuit 11 reads the electrical signal generated by the negative terminal of the pixel unit, and the second reading circuit 13 reads the electrical signal generated by the positive terminal of the pixel unit, that is, the first reading circuit 11 and the second reading circuit 13 read electrical signals generated by different terminals, the first reading circuit 11 and the second reading circuit 13 can accurately read the electrical signals generated by the fourth pixel unit 104, the first pixel unit 101 and the second pixel unit 102.

[0092] In this embodiment, since the phase difference information needs to be calculated based on the electrical signals generated by symmetrically distributed pixel units when determining the focal plane using the PDAF method, a fourth switch 141 and a fifth switch 142 can be provided in the second switch module 14. In use, the fourth switch 141 can be turned on to open the path between the third pixel unit 103 and the second reading circuit 13, allowing the second reading circuit 13 to read the electrical signal generated by the positive terminal of the third pixel unit 103. The fifth switch 142 is then turned on to open the path between the fourth pixel unit 104 and the second reading circuit 13, allowing the second reading circuit 13 to read the electrical signal generated by the positive terminal of the fourth pixel unit 104. Thus, the second reading circuit 13 can output the electrical signals generated by the positive terminals of the third pixel unit 103 and the fourth pixel unit 104, enabling the image signal processor to accurately calculate the phase difference information based on these two electrical signals.

[0093] Furthermore, when it is necessary to obtain the electrical signals generated by the positive terminals of the third pixel unit 103 and the fourth pixel unit 104, the fourth switch 141 and the fifth switch 142 can be directly turned on. In this way, the electrical signals generated by the positive terminals of the third pixel unit 103 and the fourth pixel unit 104 can be read simultaneously by the second reading circuit 13, so as to accurately obtain the electrical signals generated by the positive terminals of the third pixel unit 103 and the fourth pixel unit 104.

[0094] Thus, since a fourth and a fifth switch can be set in the second switch module, and the fourth and fifth switch are respectively connected to different pixel units on both sides of the second center line of the symmetrical part and the focusing unit, when it is necessary to obtain the electrical signals generated by the different pixel units, the fourth and fifth switch can be directly turned on respectively to obtain the electrical signals generated by the different pixel units, without the need for the image signal processor to perform additional calculations. Therefore, the amount of calculation required to obtain the electrical signals generated by the different pixel units can be reduced.

[0095] In some embodiments of the present application, Figure 6 As shown, the first reading circuit 11 includes: a first capacitor 111, the first end of which is connected to the first switch module 12, and the second end of which is grounded, and the first capacitor 111 is used to store a first electrical signal; and a first amplifier 112, the first end of which is connected to the first end of the first capacitor 111, and the second end of which is connected to the signal processing unit 20 of the image sensor, and the first amplifier 112 is used to read the first electrical signal from the first capacitor 111, amplify the first electrical signal, and output the amplified first electrical signal to the signal processing unit 20.

[0096] In some embodiments of this application, the first capacitor 111 is used to store electrical signals generated from the negative terminal of the photosensitive pixel.

[0097] In some embodiments of this application, the first amplifier 112 is used to amplify the electrical signal stored in the first capacitor 111. The third terminal of the first amplifier 112 is also connected to a third power supply VDD, so that the third power supply VDD can supply power to the first amplifier 112.

[0098] In some embodiments of this application, the second terminal of the first amplifier 112 described above can be connected to the signal processing unit 20 via a row selector SET_n.

[0099] In some embodiments of this application, the signal processing unit 20 may include an analog-to-digital converter (ADC) and an image signal processor (ISP). Thus, the amplified first electrical signal can be converted from an analog signal to a digital signal by the ADC, and the digital signal can be processed by the ISP.

[0100] Thus, since a first capacitor and a first amplifier can be set in the first reading circuit, the electrical signal generated by the negative electrode of the photosensitive pixel can be accurately obtained through the first capacitor. Therefore, the signal processing unit of the image sensor can obtain the accurate electrical signal generated by the negative electrode of the photosensitive pixel, so that the signal processing unit can accurately process the signal in subsequent steps.

[0101] In some embodiments of the present application, Figure 6 As shown, the second reading circuit 13 includes: a second capacitor 131, the first end of which is connected to the second switch module 14, and the second end of which is grounded, and the second capacitor 131 is used to store a second electrical signal; and a second amplifier 132, the first end of which is connected to the first end of the second capacitor 131, and the second end of which is connected to the signal processing unit 20 of the image sensor, and the second amplifier 132 is used to read the second electrical signal from the second capacitor 131, amplify the second electrical signal, and output the amplified second electrical signal to the signal processing unit 20.

[0102] In some embodiments of this application, the second capacitor 131 is used to store electrical signals generated from the positive terminal of the photosensitive pixel.

[0103] In some embodiments of this application, the second amplifier 132 is used to amplify the electrical signal stored in the second capacitor 131. The third terminal of the second amplifier 132 is also connected to a fourth power supply VDD, so that the fourth power supply VDD can supply power to the second amplifier 132.

[0104] In some embodiments of this application, the second terminal of the second amplifier 132 described above can be connected to the signal processing unit 20 via a row selector SET_p.

[0105] It should be noted that the description of the signal processing unit 20 can be found in the specific description in the above embodiments, and will not be repeated here.

[0106] Thus, since a second capacitor and a second amplifier can be set in the second reading circuit, the electrical signal generated by the positive electrode of the photosensitive pixel can be accurately obtained through the second capacitor. Therefore, the signal processing unit of the image sensor can obtain the accurate electrical signal generated by the positive electrode of the photosensitive pixel, so that the signal processing unit can accurately process the signal in subsequent steps.

[0107] In this embodiment of the application, when the photosensitive pixel 10 has completed exposure, the first switch module 12 and the second switch module 14 are turned on, so that the first reading circuit 11 reads and outputs the first electrical signal, and the second reading circuit 13 reads and outputs the second electrical signal; the first electrical signal and the second electrical signal are electrical signals generated by the photosensitive pixel during a single exposure.

[0108] In some embodiments of this application, the first electrical signal can be an electrical signal generated by the negative electrode of the photosensitive pixel 10. The second electrical signal can be an electrical signal generated by the positive electrode of the photosensitive pixel 10.

[0109] In some embodiments of this application, in the scenario of performing a focusing operation, the first switch module 12 can be turned on first. Specifically, the first switch transistor 121 connected to the first partial pixel unit 101 can be turned on first, and the second switch transistor 122 can be turned on, so that the first capacitor 111 in the first reading circuit 11 can store a portion of the first electrical signal of the negative terminal of the first partial pixel unit 101 (e.g., the first partial signal in the following embodiment), and the first amplifier 112 in the first reading circuit 11 can amplify the portion of the first electrical signal. The amplified portion of the first electrical signal is then converted from analog to digital by the ADC in the signal processing unit 20, so that the ISP in the signal processing unit 20 can process the converted portion of the first electrical signal to obtain the image signal (phase signal) corresponding to the first partial pixel unit 101. Then, the first switch 121 connected to the second pixel unit 102 is turned on, and the third switch 123 is turned on, so that the first capacitor 111 in the first reading circuit 11 can store another part of the first electrical signal of the negative terminal of the second pixel unit 102 (e.g., the second part of the signal in the following embodiment). At this time, the first capacitor 111 stores the entire signal of the first electrical signal, and the first amplifier 112 in the first reading circuit 11 can amplify the first electrical signal, and the ADC in the signal processing unit 20 performs analog-to-digital conversion on the amplified first electrical signal, thereby generating the signal. The ISP in the processing unit 20 can process the first electrical signal after analog-to-digital conversion to obtain the image signal (phase signal) corresponding to the first part of pixel unit 101 and the second part of pixel unit 102. Then, the ISP can subtract the image signal corresponding to the first part of pixel unit 101 from the image signal corresponding to the second part of pixel unit 102 to obtain the image signal corresponding to the second part of pixel unit 102. In this way, a phase difference information can be determined based on the image signal corresponding to the first part of pixel unit 101 and the image signal corresponding to the second part of pixel unit 102.

[0110] Next, the fourth switch 141 can be turned on so that the second capacitor 131 in the second readout circuit 13 can store a portion of the second electrical signal of the positive terminal of the third pixel unit 103 (e.g., the third portion signal in the following embodiment), and the second amplifier 132 in the second readout circuit 13 can amplify the portion of the second electrical signal. The amplified portion of the second electrical signal is then converted from analog to digital by the ADC in the signal processing unit 20. Thus, the ISP in the signal processing unit 20 can process the converted portion of the second electrical signal to obtain the image signal (phase signal) corresponding to the third pixel unit 103. Furthermore, the fifth switch 142 can be turned on so that the second capacitor 131 in the second reading circuit 13 can store another part of the second electrical signal of the positive terminal of the fourth pixel unit 104 (e.g., the fourth part signal in the following embodiment). At this time, the second capacitor 131 stores the entire signal of the second electrical signal, and the second amplifier 132 in the second reading circuit 13 can amplify the second electrical signal. The amplified second electrical signal is then converted from analog to digital by the ADC in the signal processing unit 20. Thus, the ISP in the signal processing unit 20 can process the converted second electrical signal to obtain the image signal (phase signal) corresponding to the third pixel unit 103 and the fourth pixel unit 104. Then, the ISP can subtract the image signal corresponding to the third pixel unit 103 from the image signal corresponding to the fourth pixel unit 104 to obtain the image signal corresponding to the fourth pixel unit 104. In this way, another phase difference information can be determined based on the image signal corresponding to the third pixel unit 103 and the image signal corresponding to the fourth pixel unit 104. Therefore, based on the aforementioned phase difference information in different directions and the aforementioned phase difference information, the focal plane where the focus is located can be determined, and focusing operation can be performed based on the focal plane.

[0111] It is understood that, since the embodiments of this application can calculate the aforementioned phase difference information and the aforementioned phase difference information in different directions, that is, calculate more phase difference information, the focal plane where the focus is located can be accurately determined based on the aforementioned phase difference information and the aforementioned phase difference information in different directions, thereby accurately performing the focusing operation and improving the shooting performance.

[0112] In some embodiments of this application, when performing image signal generation operations, the first switch module 12 can be turned on first. Specifically, all the first switch transistors 121, the second switch transistor 122, and the third switch transistor 123 can be turned on first, so that the first capacitor 111 in the first reading circuit 11 can store the electrical signals generated by the negative terminals of all pixel units. At this time, the first capacitor 111 can store the first electrical signals of the negative terminals of all pixel units, and the first amplifier 112 in the first reading circuit 11 can amplify the first electrical signals. The amplified first electrical signals are then converted from analog to digital by the ADC in the signal processing unit 20. Thus, the ISP in the signal processing unit 20 can process the first electrical signals after the analog-to-digital conversion to obtain the image signal 1 (phase signal) corresponding to all pixel units. Then, the fourth switch 141 and the fifth switch 142 can be turned on, so that the second capacitor 131 in the second readout circuit 13 can store the electrical signals generated by the positive terminals of all pixel units. At this time, the second capacitor 131 can store the second electrical signals of the positive terminals of all pixel units, and the second amplifier 132 in the second readout circuit 13 can amplify the second electrical signals. The amplified second electrical signals are then converted from analog to digital by the ADC in the signal processing unit 20. Thus, the ISP in the signal processing unit 20 can process the converted second electrical signals to obtain the image signal 2 (phase signal) corresponding to all pixel units. Next, the ISP can perform weighted averaging on the image signal 1 and the image signal 2 to obtain the optimized image signal.

[0113] It is understandable that, since the electrical signals generated by different poles of each pixel unit can be read by the first reading circuit 11 and the second reading circuit 13 respectively when all pixel units are exposed once, the ISP can obtain two image signals corresponding to all pixel units. In this way, the ISP can process the image signals corresponding to these two image signals to obtain a higher quality image signal, thereby improving the quality of the obtained image signal and thus improving the shooting performance.

[0114] It should be noted that the embodiments of this application can also be applied to other scenarios, and those skilled in the art can choose the application scenario according to their needs. The embodiments of this application will not be exhaustively listed here.

[0115] This application provides an image sensor, which may include a photosensitive pixel for generating an electrical signal during exposure, a first readout circuit for reading and outputting a first electrical signal from a first end of the photosensitive pixel, and a second readout circuit for reading and outputting a second electrical signal from a second end of the photosensitive pixel. The first readout circuit is connected to the first end of the photosensitive pixel via a first switching module, and the second readout circuit is connected to the second end of the photosensitive pixel via a second switching module. When the photosensitive pixel has completed exposure, the first and second switching modules are turned on, causing the first readout circuit to read and output the first electrical signal, and causing the second readout circuit to read and output the second electrical signal. The first and second electrical signals are electrical signals generated by a single exposure of the photosensitive pixel. Because the image sensor includes a first readout circuit and a second readout circuit (i.e., multiple readout circuits), and these multiple readout circuits can read and output electrical signals from multiple ends of the photosensitive pixel, when the photosensitive pixel completes each exposure, a portion of the electrical signal generated by the photosensitive pixel can be read by the first readout circuit at the first end of the photosensitive pixel and output as a first electrical signal, while another portion of the electrical signal generated by the photosensitive pixel can be read by the second readout circuit at the second end of the photosensitive pixel and output as a second electrical signal. In other words, a larger portion of the electrical signal generated by the photosensitive pixel during each exposure can be read by both the first and second readout circuits. Therefore, other components can receive a larger portion of the electrical signal generated by the photosensitive pixel during each exposure, allowing them to accurately perform shooting-related operations. This improves the shooting performance of the electronic device.

[0116] It is understood that this application provides a novel image sensor with special photosensitive pixels that can output both positive and negative electrical signals (i.e., a first electrical signal and a second electrical signal). This allows the image sensor ISP to acquire twice the image signal and selectively acquire unidirectional or bidirectional phase difference information. Consequently, the ISP can provide focusing capabilities with varying performance levels based on different scenarios or user needs, effectively improving the focusing / capture experience. Furthermore, it can provide image signals of varying quality based on different scenarios or user needs, thereby improving the quality of the captured images. Thus, shooting performance can be enhanced.

[0117] In some embodiments of this application, combined with Figure 6 The second end of the aforementioned photosensitive pixel 10 is also grounded through the third switch module 29.

[0118] In some embodiments of this application, the third switch module 29 described above may include at least one switch transistor.

[0119] In some embodiments of this application, when the photosensitive pixel 10 includes at least two pixel units, the third switching module 29 includes at least two switching transistors. The first end (e.g., the source end) of each switching transistor is connected to the second end of a pixel unit, the second end (e.g., the drain end) of each switching transistor is grounded, and the third end of each switching transistor can also be connected to a control unit, so that the switching on and off of each switching transistor can be controlled by the control unit.

[0120] For example, Figure 7 As shown, assuming the third switch module 29 includes four switching transistors, such as switch transistor 21, switch transistor 22, switch transistor 23 and switch transistor 24, and the photosensitive pixel 10 includes pixel unit PD1, pixel unit PD2, pixel unit PD3 and pixel unit PD4, then the second end of pixel unit PD1 can be grounded through switch transistor 21, the second end of pixel unit PD2 can be grounded through switch transistor 22, the second end of pixel unit PD3 can be grounded through switch transistor 23, and the second end of pixel unit PD4 can be grounded through switch transistor 24.

[0121] Thus, since the second end of the photosensitive pixel is grounded through the third switching module instead of being directly grounded, the situation where the electrical signal generated by the second end of the photosensitive pixel flows to the ground terminal after the photosensitive pixel has completed exposure can be avoided. This also avoids the situation where the second reading circuit cannot read the electrical signal generated by the second end of the photosensitive pixel.

[0122] In some embodiments of this application, the image sensor provided in this application may further include: a sixth switch 25, the first end of which is connected to a first power supply 26, and the second end of which is connected to a first switch module 12 and the first reading circuit 11; and a seventh switch 27, the first end of which is connected to a second power supply 28, and the second end of which is connected to a second switch module 14 and the second reading circuit 13.

[0123] In some embodiments of the present application, Figure 8 As shown, the second end of the sixth switch 25 can be connected to the second switch 122, the first capacitor 111, the first amplifier 112 and the third switch 123.

[0124] In some embodiments of the present application, Figure 8 As shown, the second terminal of the seventh switch 27 can be connected to the fourth switch 141, the second capacitor 131, the second amplifier 132 and the fifth switch 142.

[0125] In some embodiments of this application, before the photosensitive pixel 10 is exposed, the sixth switch 25 and the seventh switch 27 can be turned on first, so that the first power supply 26 can supply power to the first reading circuit 11 and the first terminal of the photosensitive pixel 10 through the sixth switch 25 and the first switch module 12 to reset the first reading circuit 11 and the first terminal of the photosensitive pixel 10; and the second power supply 28 can supply power to the second reading circuit 13 and the second terminal of the photosensitive pixel 10 through the seventh switch 27 and the second switch module 14 to reset the second reading circuit 13 and the second terminal of the photosensitive pixel 10.

[0126] Thus, since the image sensor can also be equipped with a sixth and a seventh switch, the first reading circuit, the second reading circuit, and both ends of the photosensitive pixel can be reset by turning on the sixth and seventh switches before the photosensitive pixel is exposed. Therefore, interference caused by the previous exposure can be avoided, thereby reducing the noise signal in the electrical signals read by the first and second reading circuits.

[0127] Figure 9 A schematic diagram of the structure of an electronic device provided in an embodiment of this application is shown. Figure 9 As shown, the electronic device 30 provided in this application embodiment may include the image sensor 31 in the above embodiment.

[0128] In some embodiments of this application, the electronic device 30 is provided with a control unit, which can be connected to the first switch module and the second switch module in the image sensor 31. Thus, the electronic device can control the on / off state of the first switch module and the second switch module through the control unit, so that the image sensor can output the required image signal.

[0129] This application provides an electronic device including the image sensor described in the above embodiments. Since the image sensor of the electronic device is equipped with a first readout circuit and a second readout circuit (i.e., multiple readout circuits), and these multiple readout circuits can respectively read and output electrical signals from multiple ends of the photosensitive pixels, when the photosensitive pixels of the image sensor complete each exposure, a portion of the electrical signals generated by the photosensitive pixels can be read by the first readout circuit at the first end of the photosensitive pixel and output as a first electrical signal, while another portion of the electrical signals generated by the photosensitive pixels can be read by the second readout circuit at the second end of the photosensitive pixel and output as a second electrical signal. That is, a larger portion of the electrical signals generated by the photosensitive pixels after each exposure can be read by both the first and second readout circuits. Therefore, other components of the electronic device can receive a larger portion of the electrical signals generated by the photosensitive pixels after each exposure, allowing these other components to accurately perform shooting-related operations, thereby improving the shooting performance of the electronic device.

[0130] Figure 10 A flowchart illustrating the control method provided in an embodiment of this application is shown. Figure 10 As shown, the control method provided in this application embodiment may include the following steps 401 and 402.

[0131] Step 401: When the photosensitive pixels of the image sensor of the electronic device have completed exposure, the electronic device turns on the first switching module of the image sensor so as to read and output the first electrical signal of the first end of the photosensitive pixel through the first reading circuit of the image sensor.

[0132] It should be noted that the description of the first switching module for the electronic device to turn on the image sensor can be found in the specific description in the above embodiments, and will not be repeated here in the embodiments of this application.

[0133] In some embodiments of this application, the photosensitive pixel includes at least two pixel units. The projection of a first portion of the pixel units onto the focusing unit of the image sensor is located in a first region, and the projection of a second portion of the pixel units onto the focusing unit is located in a second region. The first and second regions are symmetrically distributed on either side of the center of the focusing unit. In some examples, combined with... Figure 10 ,like Figure 11 As shown, step 401 can be implemented in detail through steps 401a and 401b below.

[0134] Step 401a: When the photosensitive pixels of the image sensor of the electronic device have completed exposure, the electronic device turns on the first switch transistor in the first switch module that is connected to the first part of the pixel unit, so that the first reading circuit reads and outputs the first part of the signal.

[0135] In this embodiment of the application, the first part of the signal is a part of the first electrical signal.

[0136] Step 401b: The electronic device turns on the second switch tube in the first switch module that is connected to the second part of the pixel unit, so that the first reading circuit reads and outputs the second part of the signal.

[0137] In this embodiment of the application, the second part of the signal is the part of the first electrical signal excluding the first part of the signal.

[0138] In some embodiments of this application, when the electronic device turns on the second switch connected to the second part of the pixel unit, the first reading circuit can read and output the entire signal of the first electrical signal. In this way, the electronic device can obtain the second part of the signal by subtracting the first part of the signal from the first electrical signal through the image signal processor.

[0139] Thus, since the electronic device can turn on the first switch connected to the first part of the pixel unit and the second switch connected to the second part of the pixel unit, it can obtain the electrical signals generated by the different parts of the pixel unit without the image signal processor having to perform additional calculations. Therefore, the amount of calculation required to obtain the electrical signals generated by the different parts of the pixel unit can be reduced.

[0140] In some embodiments of this application, before step 401 above, the control method provided in the embodiments of this application may further include step 400 below.

[0141] Step 400: The electronic device turns on the sixth switch transistor, the seventh switch transistor, the first switch module, and the second switch module of the image sensor to reset the photosensitive pixel and the first readout circuit through the first power supply, and to reset the photosensitive pixel and the second readout circuit through the second power supply.

[0142] Thus, it can be seen that since the electronic device can turn on the sixth switch, the seventh switch, the first switch module, and the second switch module before the photosensitive pixel is exposed, the photosensitive pixel and the first readout circuit can be reset by the first power supply, and the photosensitive pixel and the second readout circuit can be reset by the second power supply. Therefore, the interference caused by the previous exposure can be avoided, thereby reducing the noise signal in the electrical signal read by the first readout circuit and the second readout circuit.

[0143] Step 402: The electronic device turns on the second switching module of the image sensor so as to read and output the second electrical signal of the second end of the photosensitive pixel through the second reading circuit of the image sensor.

[0144] It should be noted that the description of the second switch module for the electronic device to turn on the image sensor can be found in the specific description in the above embodiments, and will not be repeated here in the embodiments of this application.

[0145] In this embodiment of the application, the first electrical signal and the second electrical signal are electrical signals generated by a single exposure of the photosensitive pixel.

[0146] In some embodiments of this application, the projection of a third portion of the pixel units from at least two pixel units onto the focusing unit is located in a third region, and the projection of a fourth portion of the pixel units from at least two pixel units onto the focusing unit is located in a fourth region. The third and fourth regions are symmetrically distributed on both sides of the center of the focusing unit. The third region overlaps with the first region, and the fourth region overlaps with the second region. In some examples, step 402 can be specifically implemented using steps 402a and 402b described below.

[0147] Step 402a: The electronic device turns on the fourth switch tube in the second switch module that is connected to the third part of the pixel unit, so that the second reading circuit reads and outputs the third part of the signal.

[0148] In this embodiment of the application, the third part of the signal is a part of the second electrical signal.

[0149] Step 402b: The electronic device turns on the fifth switch tube in the second switch module that is connected to the fourth pixel unit, so that the second reading circuit reads and outputs the fourth signal.

[0150] In this embodiment of the application, the fourth part of the signal is the part of the second electrical signal excluding the third part of the signal.

[0151] In some embodiments of this application, when the electronic device turns on the fifth switch connected to the fourth pixel unit, the second reading circuit can read and output the entire signal of the second electrical signal. In this way, the electronic device can obtain the fourth signal by subtracting the third signal from the second electrical signal through the image signal processor.

[0152] Thus, since the electronic device can turn on the fourth switch connected to the third pixel unit and the fifth switch connected to the fourth pixel unit, it can obtain the electrical signals generated by the different pixel units without the need for the image signal processor to perform additional calculations. Therefore, the amount of calculation required to obtain the electrical signals generated by the different pixel units can be reduced.

[0153] This application provides a control method in which an electronic device, upon completion of exposure of the photosensitive pixel of its image sensor, activates a first switching module of the image sensor to read and output a first electrical signal from the first end of the photosensitive pixel via a first readout circuit; and activates a second switching module of the image sensor to read and output a second electrical signal from the second end of the photosensitive pixel via a second readout circuit. The first and second electrical signals are generated by the photosensitive pixel during a single exposure. Since the electronic device can activate both the first and second switching modules upon completion of exposure, a portion of the electrical signal generated by the photosensitive pixel can be read by the first readout circuit at the first end of the photosensitive pixel and output as a first electrical signal, while another portion can be read by the second readout circuit at the second end of the photosensitive pixel and output as a second electrical signal. This ensures that a greater portion of the electrical signal generated by the photosensitive pixel during each exposure can be read by both the first and second readout circuits. Therefore, other components can receive a greater portion of the electrical signal generated by the photosensitive pixel during each exposure, allowing them to accurately perform shooting-related operations, thus improving the shooting performance of the electronic device.

[0154] In some embodiments of this application, after step 402 above, the control method provided in the embodiments of this application may further include steps 403 to 405 as described below.

[0155] Step 403: The electronic device determines the first phase difference information based on the first part of the signal and the second part of the signal through the signal processing unit of the image sensor.

[0156] In some embodiments of this application, the electronic device can directly determine the difference between the first part of the signal and the second part of the signal as the first phase difference information.

[0157] Step 404: The electronic device determines the second phase difference information based on the third part signal and the fourth part signal through the signal processing unit.

[0158] In some embodiments of this application, the electronic device can directly determine the difference between the third part signal and the fourth part signal as the second phase difference information.

[0159] Step 405: The electronic device determines the focal position information based on the first phase difference information and the second phase difference information through the signal processing unit.

[0160] In some embodiments of this application, the electronic device can determine the position information 1 of the focal plane where the focal point is located based on the first phase difference information, and determine the position information 2 of the focal plane where the focal point is located based on the second phase difference information. In this way, the electronic device can determine the accurate focal point position information based on the position information 1 and the position information 2.

[0161] Thus, since electronic devices can calculate the first phase difference information and the second phase difference information in different directions, that is, they can calculate more phase difference information. Based on the first phase difference information and the second phase difference information in different directions, the focal plane where the focus is located can be accurately determined, thereby accurately performing the focusing operation and improving the shooting performance.

[0162] In some embodiments of this application, after step 402 described above, the control method provided in the embodiments of this application may further include steps 406 to 408 as described below.

[0163] Step 406: The electronic device generates a first image signal based on the first electrical signal through the signal processing unit of the image sensor.

[0164] Step 407: The electronic device generates a second image signal based on the second electrical signal through the signal processing unit.

[0165] Step 408: The electronic device performs weighted averaging processing on the first image signal and the second image signal through the signal processing unit to obtain the optimized image signal.

[0166] It should be noted that for the explanation of weighted average processing based on the first image signal and the second image signal, please refer to the specific description in the related technology, and the embodiments of this application will not be repeated here.

[0167] Thus, it can be seen that, since the electrical signals generated by different poles of each pixel unit can be read separately by the first and second reading circuits when the photosensitive pixel is exposed once, the signal processing unit can obtain the image signals corresponding to the two photosensitive pixels. In this way, the signal processing unit can perform weighted averaging processing on the image signals corresponding to the two photosensitive pixels to achieve noise reduction and obtain a higher quality image signal, thereby improving the quality of the obtained image signal and thus improving the shooting performance.

[0168] In some embodiments of the present application, Figure 12As shown, this application embodiment also provides an electronic device 500, including a processor 501 and a memory 502. The memory 502 stores a program or instructions that can run on the processor 501. When the program or instructions are executed by the processor 501, they implement the various process steps of the above-described control method embodiment and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0169] It should be noted that the electronic devices in the embodiments of this application include the aforementioned mobile electronic devices and non-mobile electronic devices.

[0170] Figure 13 A schematic diagram of the hardware structure of an electronic device to implement an embodiment of this application.

[0171] The electronic device 600 includes, but is not limited to, components such as: radio frequency unit 601, network module 602, audio output unit 603, input unit 604, sensor 605, display unit 606, user input unit 607, interface unit 608, memory 609, and processor 610.

[0172] Those skilled in the art will understand that the electronic device 600 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 610 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 13 The electronic device structure shown does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0173] The processor 610 is configured to, when the photosensitive pixel of the image sensor of the electronic device has completed exposure, turn on the first switching module of the image sensor to read and output a first electrical signal of the first end of the photosensitive pixel through the first reading circuit of the image sensor; and turn on the second switching module of the image sensor to read and output a second electrical signal of the second end of the photosensitive pixel through the second reading circuit of the image sensor; the first electrical signal and the second electrical signal are electrical signals generated by the photosensitive pixel during a single exposure.

[0174] This application provides an electronic device that, when the photosensitive pixels of the image sensor have completed exposure, can activate a first switching module of the image sensor to read and output a first electrical signal from the first end of the photosensitive pixel through a first reading circuit; and activate a second switching module of the image sensor to read and output a second electrical signal from the second end of the photosensitive pixel through a second reading circuit. The first and second electrical signals are electrical signals generated by the photosensitive pixel during a single exposure. Because the electronic device can activate both the first and second switching modules when the photosensitive pixel has completed exposure, a portion of the electrical signal generated by the photosensitive pixel can be read by the first reading circuit at the first end of the photosensitive pixel and output as a first electrical signal, while another portion can be read by the second reading circuit at the second end of the photosensitive pixel and output as a second electrical signal. This means that a larger portion of the electrical signal generated by the photosensitive pixel during each exposure can be read by both the first and second reading circuits. Therefore, other components can receive a larger portion of the electrical signal generated by the photosensitive pixel during each exposure, allowing them to accurately perform shooting-related operations, thus improving the shooting performance of the electronic device.

[0175] In some embodiments of this application, the photosensitive pixel includes at least two pixel units, the projection of a first portion of the pixel units on the light-collecting unit of the image sensor is located in a first region, and the projection of a second portion of the pixel units on the light-collecting unit is located in a second region. The first region and the second region are symmetrically distributed on both sides of the first center line of the light-collecting unit.

[0176] The processor 610 is specifically used to turn on the first switch transistor connected to the first part of the pixel unit in the first switch module, so that the first reading circuit reads and outputs the first part of the signal, the first part of the signal being a part of the first electrical signal; and to turn on the second switch transistor connected to the second part of the pixel unit in the first switch module, so that the first reading circuit reads and outputs the second part of the signal, the second part of the signal being a part of the first electrical signal excluding the first part of the signal.

[0177] In some embodiments of this application, the projection of the third part of the pixel unit in the at least two pixel units onto the light-concentrating unit is located in the third region, and the projection of the fourth part of the pixel unit in the at least two pixel units onto the light-concentrating unit is located in the fourth region. The third region and the fourth region are symmetrically distributed on both sides of the second center line of the light-concentrating unit.

[0178] The processor 610 is specifically used to turn on the fourth switch transistor in the second switch module that is connected to the third part of the pixel unit, so that the second reading circuit reads and outputs the third part of the signal, which is a part of the second electrical signal; and to turn on the fifth switch transistor in the second switch module that is connected to the fourth part of the pixel unit, so that the second reading circuit reads and outputs the fourth part of the signal, which is a part of the second electrical signal excluding the third part of the signal.

[0179] In some embodiments of this application, the processor 610 is further configured to, after turning on the second switching module of the image sensor to read and output the second electrical signal of the second end of the photosensitive pixel through the second reading circuit of the image sensor, determine the first phase difference information based on the first part of the signal and the second part of the signal through the signal processing unit of the image sensor; determine the second phase difference information based on the third part of the signal and the fourth part of the signal through the signal processing unit; and determine the focus position information based on the first phase difference information and the second phase difference information through the signal processing unit.

[0180] In some embodiments of this application, the processor 610 is further configured to, after turning on the second switching module of the image sensor to read and output the second electrical signal of the second end of the photosensitive pixel through the second reading circuit of the image sensor, generate a first image signal based on the first electrical signal through the signal processing unit of the image sensor; generate a second image signal based on the second electrical signal through the signal processing unit; and perform weighted average processing based on the first image signal and the second image signal through the signal processing unit to obtain an optimized image signal.

[0181] In some embodiments of this application, the processor 610 is further configured to, before turning on the first switching module of the image sensor to read and output the first electrical signal of the first end of the photosensitive pixel through the first reading circuit of the image sensor after the photosensitive pixel of the electronic device has completed exposure, turn on the sixth switching transistor, the seventh switching transistor of the image sensor, the first switching module, and the second switching module of the image sensor to reset the photosensitive pixel and the first reading circuit through the first power supply, and reset the photosensitive pixel and the second reading circuit through the second power supply.

[0182] It should be understood that, in this embodiment, the input unit 604 may include a graphics processing unit (GPU) 6041 and a microphone 6042. The GPU 6041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 606 may include a display panel 6061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 607 includes at least one of a touch panel 6071 and other input devices 6072. The touch panel 6071 is also called a touch screen. The touch panel 6071 may include a touch detection device and a touch controller. Other input devices 6072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0183] The memory 609 can be used to store software programs and various data. The memory 609 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 609 may include volatile memory or non-volatile memory, or both. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DRRAM). The memory 609 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0184] Processor 610 may include one or more processing units; optionally, processor 610 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 610.

[0185] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described control method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0186] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0187] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above control method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0188] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0189] This application provides a computer program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the control method embodiments described above, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0190] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0191] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0192] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An image sensor, characterized in that, include: Photosensitive pixels are used to generate electrical signals during exposure; A first reading circuit is connected to the first end of the photosensitive pixel via a first switching module. The first reading circuit is used to read and output a first electrical signal from the first end of the photosensitive pixel. The second reading circuit is connected to the second end of the photosensitive pixel through a second switching module. The second reading circuit is used to read and output the second electrical signal of the second end of the photosensitive pixel. When the photosensitive pixel has completed exposure, the first switch module and the second switch module are turned on, so that the first readout circuit reads and outputs the first electrical signal, and the second readout circuit reads and outputs the second electrical signal; the first electrical signal and the second electrical signal are electrical signals generated by the photosensitive pixel during a single exposure.

2. The image sensor according to claim 1, characterized in that, The photosensitive pixel includes at least two pixel units; The first switch module includes: At least two first switching transistors are provided, with the first end of each first switching transistor connected to the first end of one of the pixel units, and the second end of each first switching transistor connected to the first readout circuit.

3. The image sensor according to claim 2, characterized in that, The image sensor further includes a light-gathering unit, which is used to converge light onto the photosensitive pixel during exposure; the projection of a first portion of the pixel units in at least two of the pixel units onto the light-gathering unit is located in a first region, and the projection of a second portion of the pixel units in at least two of the pixel units onto the light-gathering unit is located in a second region, with the first region and the second region symmetrically distributed on both sides of the first center line of the light-gathering unit; The first switch module also includes: The second switch is connected to the first terminal of the second switch and the second terminal of the first switch connected to the first partial pixel unit, and the second terminal of the second switch is connected to the first readout circuit. The third switch is connected to the first terminal of the first switch connected to the second portion of the pixel unit, and the second terminal of the third switch is connected to the first readout circuit.

4. The image sensor according to claim 2, characterized in that, The image sensor further includes a light-gathering unit for focusing light onto the photosensitive pixel during exposure; the projection of a third portion of the pixel units in at least two of the pixel units onto the light-gathering unit is located in a third region, and the projection of a fourth portion of the pixel units in at least two of the pixel units onto the light-gathering unit is located in a fourth region, the third region and the fourth region being symmetrically distributed on both sides of the second center line of the light-gathering unit; The second switch module includes: The fourth switch transistor has its first end connected to the third pixel unit and its second end connected to the second readout circuit. The fifth switch is connected at its first end to the fourth pixel unit and at its second end to the second readout circuit.

5. The image sensor according to claim 1, wherein the first readout circuit comprises: A first capacitor, with its first terminal connected to the first switch module and its second terminal grounded, is used to store the first electrical signal. A first amplifier has a first terminal connected to a first terminal of a first capacitor and a second terminal connected to a signal processing unit of the image sensor. The first amplifier is used to read the first electrical signal from the first capacitor, amplify the first electrical signal, and output the amplified first electrical signal to the signal processing unit.

6. The image sensor according to claim 1, wherein the second readout circuit comprises: The second capacitor has a first terminal connected to the second switch module and a second terminal grounded. The second capacitor is used to store the second electrical signal. The second amplifier has a first terminal connected to the first terminal of the second capacitor and a second terminal connected to the signal processing unit of the image sensor. The second amplifier is used to read the second electrical signal from the second capacitor, amplify the second electrical signal, and output the amplified second electrical signal to the signal processing unit.

7. The image sensor according to claim 1, characterized in that, The second end of the photosensitive pixel is also grounded through a third switch module.

8. The image sensor according to claim 1, characterized in that, The image sensor also includes: The sixth switching transistor has its first end connected to the first power supply and its second end connected to the first switching module and the first reading circuit. The seventh switch transistor has its first terminal connected to the second power supply and its second terminal connected to the second switch module and the second reading circuit. Before the photosensitive pixel is exposed, the sixth switch, the seventh switch, the first switch module, and the second switch module are turned on, so that the first power supply resets the photosensitive pixel and the first readout circuit, and the second power supply resets the photosensitive pixel and the second readout circuit.

9. An electronic device, characterized in that, include: The image sensor as described in any one of claims 1 to 8.

10. A control method applied to the electronic device as described in claim 9, characterized in that, include: When the photosensitive pixel of the image sensor of the electronic device has completed exposure, the first switching module of the image sensor is turned on so that the first reading circuit of the image sensor can read and output the first electrical signal of the first end of the photosensitive pixel. The second switching module of the image sensor is turned on so that the second electrical signal of the second end of the photosensitive pixel is read and output through the second reading circuit of the image sensor; The first electrical signal and the second electrical signal are electrical signals generated by a single exposure of the photosensitive pixel.

11. The method according to claim 10, characterized in that, The photosensitive pixel includes at least two pixel units. The projection of a first portion of the pixel units on the light-gathering unit of the image sensor is located in a first region, and the projection of a second portion of the pixel units on the light-gathering unit is located in a second region. The first region and the second region are symmetrically distributed on both sides of the first center line of the light-gathering unit. The first switching module of the image sensor is turned on to read and output a first electrical signal from the first end of the photosensitive pixel through the first reading circuit of the image sensor, including: Turn on the first switch transistor in the first switch module that is connected to the first part of the pixel unit so that the first reading circuit reads and outputs the first part of the signal, the first part of the signal being a part of the first electrical signal; The second switch transistor connected to the second part of the pixel unit in the first switch module is turned on, so that the first reading circuit reads and outputs the second part of the signal, which is the part of the first electrical signal other than the first part of the signal.

12. The method according to claim 11, characterized in that, The projection of the third portion of the pixel units in at least two of the pixel units onto the light-concentrating unit is located in the third region, and the projection of the fourth portion of the pixel units in at least two of the pixel units onto the light-concentrating unit is located in the fourth region. The third region and the fourth region are symmetrically distributed on both sides of the second center line of the light-concentrating unit. The second switching module of the image sensor is activated to read and output a second electrical signal from the second end of the photosensitive pixel through the second reading circuit of the image sensor, including: The fourth switch transistor in the second switch module, which is connected to the third pixel unit, is turned on so that the second reading circuit reads and outputs the third signal, which is a part of the second electrical signal. The fifth switch tube in the second switch module, which is connected to the fourth pixel unit, is turned on so that the second reading circuit reads and outputs the fourth signal, which is the part of the second electrical signal excluding the third signal.

13. The method according to claim 12, characterized in that, After the second switching module of the image sensor is turned on to read and output the second electrical signal of the second terminal of the photosensitive pixel through the second readout circuit of the image sensor, the method further includes: The signal processing unit of the image sensor determines the first phase difference information based on the first part of the signal and the second part of the signal. The signal processing unit determines the second phase difference information based on the third part of the signal and the fourth part of the signal. The signal processing unit determines the focal position information based on the first phase difference information and the second phase difference information.

14. The method according to any one of claims 10 to 13, characterized in that, After the second switching module of the image sensor is turned on to read and output the second electrical signal of the second terminal of the photosensitive pixel through the second readout circuit of the image sensor, the method further includes: The signal processing unit of the image sensor generates a first image signal based on the first electrical signal. The signal processing unit generates a second image signal based on the second electrical signal. The signal processing unit performs a weighted average processing on the first image signal and the second image signal to obtain an optimized image signal.

15. The method according to claim 10, characterized in that, Before the first switching module of the image sensor is turned on after the photosensitive pixel of the image sensor of the electronic device has been exposed, so as to read and output the first electrical signal of the first end of the photosensitive pixel through the first reading circuit of the image sensor, the method further includes: The sixth switch, the seventh switch, the first switch module, and the second switch module of the image sensor are turned on to reset the photosensitive pixel and the first readout circuit through the first power supply, and to reset the photosensitive pixel and the second readout circuit through the second power supply.

16. An electronic device, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the control method as described in any one of claims 10 to 15.

Images