Signal processing device and electronic equipment

Abstract

The present application discloses a signal processing device and electronic device, belonging to the field of image processing technology. The signal processing device is connected to an image sensor, wherein the image sensor includes a plurality of pixels distributed in an array, wherein the pixels include at least one of a rolling shutter module and a global shutter module. The signal processing device includes: a data selection module, an analog-to-digital conversion module, and a digital signal processing module. The data selection module is connected to the pixels and is used to determine a conductive path based on the module type within the pixels, wherein the module type includes the rolling shutter module and the global shutter module. The analog-to-digital conversion module is connected to the data selection module and is used to convert the output signal of at least one of the rolling shutter module and the global shutter module into a digital signal in parallel. The digital signal processing module is connected to the analog-to-digital conversion module and is used to perform signal processing on the digital signal.

Description

Technical Field

[0001] The present application belongs to the field of image processing technology, and specifically relates to a signal processing device and electronic equipment. Background Art

[0002] In a complementary metal-oxide semiconductor (CMOS) image sensor (CIS), there are two pixel exposure methods: rolling shutter and global shutter. Global shutter pixels are categorized into charge domain global shutter and voltage domain global shutter.

[0003] In related technologies, rolling shutter is widely used in CIS, which uses a row-parallel signal processing architecture, and the signal is read and processed column by column. The working mode of global shutter CIS is to reset all pixels as a whole within one frame time - expose as a whole - read as a whole. If an image sensor includes both rolling shutter and global shutter, if column-by-column reading is used, this will extend the proportion of global shutter reading time period in one frame time, making the global shutter less efficient. If all pixels are reset as a whole within one frame time - expose as a whole - read as a whole, the signal of rolling shutter cannot be read. Summary of the Invention

[0004] The embodiments of the present application provide a signal processing device and an electronic device, which can solve the problem in the prior art that the CIS that simultaneously outputs the output signal of the rolling shutter module and the output signal of the global shutter module cannot be processed by the existing signal processing or has low efficiency.

[0005] In a first aspect, an embodiment of the present application provides a signal processing device connected to an image sensor, wherein the image sensor includes a plurality of pixels distributed in an array, and the pixels include at least one of a rolling shutter module and a global shutter module; the signal processing device includes: a data selection module, an analog-to-digital conversion module, and a digital signal processing module;

[0006] The data selection module is connected to the pixel and is used to determine a conductive path according to a module type in the pixel, wherein the module type includes the rolling shutter module and the global shutter module;

[0007] The analog-to-digital conversion module is connected to the data selection module and is used to convert the output signal of at least one of the rolling shutter module and the global shutter module into a digital signal in parallel;

[0008] The digital signal processing module is connected to the analog-to-digital conversion module and is used to perform signal processing on the digital signal.

[0009] In a second aspect, an embodiment of the present application provides an electronic device, comprising the signal processing device described in the first aspect.

[0010] Disclosed in an embodiment of the present application is a signal processing device that can be connected to an image sensor. The signal processing device includes a data selection module, an analog-to-digital conversion module, and a digital signal processing module. The data selection module is connected to a pixel of the image sensor and is used to determine a conductive path based on the module type within the pixel. Gate module types include rolling shutter modules and global shutter modules. The analog-to-digital conversion module is connected to the data selection module and is used to convert the output signal of at least one of the rolling shutter module and the global shutter module into a digital signal in parallel. The digital signal processing module is connected to the analog-to-digital conversion module and is used to perform signal processing on the data signal. In an embodiment of the present application, the output signal of the rolling shutter module and the output signal of the global shutter module output by each pixel are processed by independent parallel links, thereby achieving independent and simultaneous processing and output of the output signals of the rolling shutter module and the global shutter module without interfering with each other, thereby reducing noise crosstalk and improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a structural block diagram of a signal processing device provided by an embodiment of the present application;

[0012] Figure 2 is a detailed structural block diagram of a signal processing device provided by an embodiment of the present application;

[0013] Figure 3 is another detailed structural block diagram of a signal processing device provided by an embodiment of the present application;

[0014] Figure 4 This is a circuit diagram of a signal processing device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0015] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0016] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0017] The following is combined with Figure 1-4 , a signal processing device and an electronic device provided in an embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0018] like Figure 1 As shown in FIG, it is a structural block diagram of the signal processing device provided in the embodiment of the present application. Figure 1 As shown, the signal processing device can be connected to an image sensor including at least one of a rolling shutter module and a global shutter module, and is used to process the signal output by the image sensor. The image sensor includes a plurality of pixels distributed in an array, and each pixel includes at least one of the rolling shutter module and the global shutter module. The signal processing device includes: a data selection module, an analog-to-digital conversion module, and a digital signal processing module. The data selection module is connected to the pixel and is used to determine the conductive path based on the module type within the pixel, which includes a rolling shutter module and a global shutter module. The analog-to-digital conversion module is connected to the data selection module and is used to convert the output signal of at least one of the rolling shutter module and the global shutter module into a digital signal in parallel. The digital signal processing module is connected to the analog-to-digital conversion module and is used to perform signal processing on the data signal.

[0019] The output signal of the rolling shutter module and the output signal of the global shutter module output by each pixel are processed by independent parallel links. That is, the output signal of each pixel includes at least one of the rolling shutter signal link and the global shutter signal link. The specific processing flow is as follows: the pixel output signal first passes through a data selector. The data selector can connect the corresponding link for subsequent processing based on whether the pixel contains a rolling shutter module or a global shutter module. If a branch does not require subsequent signal processing, the branch can be disconnected to reduce power consumption. The signal then enters the analog-to-digital conversion module and is converted into a digital signal. During this process, the signal output by the rolling shutter module and the signal output by the global shutter module are processed together in the analog-to-digital conversion module. After being converted into digital signals, they enter the digital signal processing module for signal processing. This process may include noise reduction, digital signal amplification, bad pixel elimination, etc. Finally, the processed signal is output to the image sensor.

[0020] Among them, the analog-to-digital converter can be a single-slope analog to digital converter (SS-ADC), a successive approximation register (SAR), or other analog-to-digital converters, which is not limited in this application and is subject to actual application.

[0021] In an embodiment of the present application, a signal processing device can be connected to an image sensor for processing a signal output by the image sensor. The signal processing device includes a data selection module, an analog-to-digital conversion module, and a digital signal processing module. The data selection module is connected to a pixel of the image sensor and is used to determine a conductive path based on the module type within the pixel. Gate module types include rolling shutter modules and global shutter modules. The analog-to-digital conversion module is connected to the data selection module and is used to convert the output signal of at least one of the rolling shutter module and the global shutter module into a digital signal in parallel. The digital signal processing module is connected to the analog-to-digital conversion module and is used to perform signal processing on the data signal. In an embodiment of the present application, the output signal of the rolling shutter module and the output signal of the global shutter module output by each pixel are processed by independent parallel links. This achieves independent and simultaneous processing and output of the output signals of the rolling shutter module and the global shutter module without interfering with each other, thereby reducing noise crosstalk and improving processing efficiency.

[0022] like Figure 2As shown, in a possible embodiment of the present application, the data selection module includes a first switch and a second switch; the first end of the first switch is connected to the output end of a row or a column of rolling shutter modules, and the second end of the first switch is connected to the input end of the analog-to-digital conversion module; the first end of the second switch is connected to the output end of a row or a column of global shutter modules, and the second end of the second switch is connected to the input end of the analog-to-digital conversion module.

[0023] That is, the signal output by the rolling shutter module in each row or column of pixels is transmitted through the first switch, and the signal output by the global shutter module in each row or column of pixels is transmitted through the second switch, so that the output signal of the rolling shutter module and the output signal of the global shutter module are output independently without interfering with each other.

[0024] In a possible embodiment of the present application, the analog-to-digital conversion module includes: multiple first comparators, multiple first buffers, multiple second comparators and multiple second buffers; the first input end of each first comparator is connected to the output end of a row or a column of rolling shutter modules, the second input end of each first comparator is connected to the reference signal terminal, and the output end of each first comparator is connected to the input end of a first buffer; the first input end of each second comparator is connected to the output end of a row or a column of global shutter modules, the second end of each second comparator is connected to the reference signal terminal, and the output end of each second comparator is connected to the input end of a second buffer.

[0025] That is, each first comparator and first buffer is connected to the output end of a row or column of rolling shutter modules for processing the output signal of the rolling shutter modules, and each second comparator and second buffer is connected to the output end of a row or column of global shutter modules for processing the output signal of the global shutter modules. The output signal is input to the first input end of the comparator and compared with the reference signal input to the second input end of the comparator. The comparator outputs a signal after the comparison result and buffers it in the buffer. Specifically, the reference signal terminal is a ramp signal generator, and the signal processing device further includes: a counter; the counter is connected to the input end of the first buffer, and when the output signal of the ramp signal generator is lower than the output signal of the rolling shutter module, the counter increases one bit to the first buffer; the counter is connected to the input end of the second buffer, and when the ramp signal output by the ramp signal generator is lower than the output signal of the global shutter module, the counter increases one bit to the second buffer.

[0026] In an embodiment of the present application, all input signals are uniformly compared with a ramp signal generated by a ramp signal generator. After the comparator compares the result, it outputs a signal to notify the subsequent binary (N-bit) buffer. The buffer cache is controlled by the N-bit counting signal input by the N-bit binary counting module (Counter) in the time counter, and the signal output by the comparator will stop the counter counting and temporarily store the N-bit binary number at the time of stop in the N-bit buffer. The output signals of all parallel rolling shutters and global shutter modules are converted into N-bit digital signals and input into the digital signal processing module for back-end digital signal processing, and finally output by the port module to obtain the output signal. Since the output signal of the rolling shutter module and the output signal of the global shutter module adopt a parallel processing structure in the analog-to-digital conversion module, the timing of the digital signal output can be unified while improving the conversion efficiency, thereby improving the signal processing efficiency.

[0027] Before the output signal enters the analog-to-digital conversion module, analog signal processing can also be performed to reduce noise and / or amplify the output signal. However, since some image sensor chips are small and the area of ​​small chips is small, the analog signal processing module cannot be prevented. Therefore, the analog signal processing module can be eliminated or the functional devices in the analog signal processing module can be reduced.

[0028] In a possible embodiment of the present application, the signal processing device also includes: an analog signal processing module, the analog signal processing module includes multiple first analog signal processing units and multiple second analog signal processing units; the input end of each first analog signal processing unit is connected to the output end of a row or a column of rolling shutter modules, and the output end of each first analog signal processing unit is connected to the first input end of a first comparator; the input end of each second analog signal processing unit is connected to the output end of a row or a column of global shutter modules, and the output end of each second analog signal processing unit is connected to the first input end of a second comparator.

[0029] In an embodiment of the present application, before the output signal of the rolling shutter module and the output signal of the global shutter module enter the analog-to-digital conversion module, they can first enter the analog signal processing module for processing. Each first analog signal processing unit is connected to the output end of a row or column of rolling shutter modules for processing the output signal of the rolling shutter module, and each second analog signal processing unit is connected to the output end of a row or column of global shutter modules for processing the output signal of the global shutter module. Since the output signal of the rolling shutter module and the output signal of the global shutter module are separately routed in the analog signal processing module part and do not interfere with each other, the analog noise crosstalk can be reduced. The use of a parallel signal processing architecture in the analog signal processing module can improve the signal processing efficiency.

[0030] like Figure 3 As shown, in a possible embodiment of the present application, the data selection module includes a first switch and a second switch; the first end of the first switch is connected to the output end of a row or a column of rolling shutter modules, and the second end of the first switch is connected to the input end of the analog-to-digital conversion module; the first end of the second switch is connected to the output end of a global shutter module, and the second end of the second switch is connected to the input end of the analog-to-digital conversion module.

[0031] In the embodiments of the present application, in addition to the aforementioned embodiments in which the output signal of each row or column of global shutter modules is controlled by a single switch, each second switch can also be used to independently control the output signal of a global shutter module. In other words, the output signal of the rolling shutter module is processed using a row-parallel or column-parallel architecture, while the output signal of the global shutter module is processed using a pixel-parallel architecture. Each pixel is configured with a data selection switch for the global shutter module. This also allows the output signals of the rolling shutter module and the global shutter module to be independently output without interfering with each other.

[0032] In a possible embodiment of the present application, the analog-to-digital conversion module includes: multiple first comparators, multiple first buffers, multiple second comparators and multiple second buffers; the first input end of each first comparator is connected to the output end of a row or a column of rolling shutter modules, the second input end of each first comparator is connected to the reference signal terminal, and the output end of each first comparator is connected to the input end of a first buffer; the first input end of each second comparator is connected to the output end of a global shutter module, the second input end of each second comparator is connected to the reference signal terminal, and the output end of each second comparator is connected to the input end of a second buffer.

[0033] That is, each first comparator and first buffer is connected to the output end of a row or a column of rolling shutter modules, and is used to process the output signal of a row or a column of rolling shutter modules. Each second comparator and second buffer is connected to the output end of a global shutter module, and is used to process the output signal of the global shutter module in a pixel. Finally, the output signal is output by the port module to obtain the output signal.

[0034] In an embodiment of the present application, the output signal of the rolling shutter module is processed using a row-parallel or column-parallel architecture, and the output signal of the global shutter module is processed using a pixel-parallel architecture. Each pixel is configured with a data selection switch, a comparator and a buffer of the global shutter module. Since the output signal of the rolling shutter module and the output signal of the global shutter module use independent routing in the analog-to-digital conversion module and do not interfere with each other, noise crosstalk can be reduced, and the timing of digital signal output can be unified while improving the efficiency of their respective signal processing.

[0035] Optionally, the reference signal terminal is a ramp signal generator, and the signal processing device further includes: a counter; the counter is connected to the input end of the first buffer, and when the output signal of the ramp signal generator is lower than the output signal of the rolling shutter module, the counter increases one bit to the first buffer; the counter is connected to the input end of the second buffer, and when the output signal of the ramp signal generator is lower than the output signal of the global shutter module, the counter increases one bit to the second buffer.

[0036] In an embodiment of the present application, for the output signal of the rolling shutter module, the input output signal of the rolling shutter module is uniformly compared with the same ramp signal. The comparison result directly pauses the count output by the N-bit binary counter in the timer to each buffer. The count during the pause is directly buffered in the N-bit buffer, completing the analog-to-digital signal conversion process. The converted digital signal is read by the digital signal processing module and then subjected to digital signal processing. For the output signal of the global shutter module, the ramp signal used for analog-to-digital conversion in the rolling shutter module's output signal processing is also input to the comparator corresponding to each pixel and compared with the input output signal of the global shutter module. The comparison result directly pauses the count output by the N-bit binary counter in the timer used for analog-to-digital conversion in the rolling shutter module's output signal processing. The count during the pause is directly buffered in the N-bit buffer, completing the global shutter analog-to-digital signal conversion process. The converted N-bit global shutter digital signal temporarily stored in the pixel buffer is read by the digital signal processing module using a row-parallel read mode and time-aligned with the N-bit rolling shutter digital signal for digital signal processing. The global shutter module's output signal processing uses a pixel-parallel signal processing architecture, enabling pixels to collaboratively optimize global shutter signal processing efficiency. The rolling shutter module's output signal processing uses a row-parallel or column-parallel signal processing architecture, enabling rolling shutter signal processing to collaboratively optimize signal processing efficiency with pixels.

[0037] Before the output signal enters the analog-to-digital conversion module, analog signal processing can also be performed to reduce noise and / or amplify the output signal. However, since some image sensor chips are small and the area of ​​the small chip is small, the analog signal processing module cannot be placed. Therefore, the analog signal processing module can be eliminated or the functional devices in the analog signal processing module can be reduced.

[0038] In a possible embodiment of the present application, the signal processing device also includes: an analog signal processing module, the analog signal processing module includes multiple first analog signal processing units and multiple second analog signal processing units; the input end of each first analog signal processing unit is connected to the output end of a row or a column of rolling shutter modules, and the output end of each first analog signal processing unit is connected to the first input end of a first comparator; the input end of each second analog signal processing unit is connected to the output end of a global shutter module, and the output end of each first analog signal processing unit is connected to the first input end of a second comparator.

[0039] In an embodiment of the present application, the output signals of the rolling shutter module and the global shutter module may first be processed in the analog signal processing module before entering the analog-to-digital conversion module. Each first analog signal processing unit is connected to the output end of a row or column of rolling shutter modules to process the output signal of the rolling shutter module. Each second analog signal processing unit is connected to the output end of the global shutter module in a pixel to process the output signal of a global shutter module. Because the output signals of the rolling shutter module and the global shutter module are routed separately in the analog signal processing module, they do not interfere with each other, which can reduce noise crosstalk.

[0040] In a possible embodiment of the present application, the first analog signal processing unit and the second analog signal processing unit both include: a noise reduction circuit and an amplifier; the input end of the noise reduction circuit is connected to the output end of the pixel, the output end of the noise reduction circuit is connected to the input end of the amplifier, and the output end of the amplifier is connected to the input end of the analog-to-digital conversion module.

[0041] That is, the analog signal processing module may include two devices, a noise reduction circuit and an amplifier, to perform initial noise reduction processing and adjustable gain amplification on the output signals of the rolling shutter module and the global shutter module.

[0042] The noise reduction circuit may be a Correlated Double Sampling (CDS) circuit or a Correlated Multiple Sampling (CMS) circuit, and the amplifier may be a Progammable Gain Amplifier (PGA).

[0043] In a specific embodiment of the present application, Figure 4 As shown, the CDS circuit stores the noise signal and the pixel output signal in C Noise and C Signal Two capacitors. When φ HLD After the signal is pulled high, the pixel output signal and the noise signal enter the positive and negative poles of the differential amplifier at the same time, and the output signal is the pixel output signal with the noise eliminated. The PGA is mainly composed of an operational amplifier, through a variable capacitor C Gain and C In Perform gain adjustment. RST Signal is used to reset the PGA, φ REF The signal is the reference voltage of the amplifier. The pixel output signal after the PGA output is amplified enters the SS-ADC module and is directly passed through a comparator and the ramp signal φ RAMPWhen the ramp voltage changes to be equal to the pixel output signal, the comparator outputs a high level signal to stop the N-bit counter signal Φ COUNT Count of φ when stopped COUNT The count is buffered in a cache consisting of an N-bit latch circuit to complete the analog-to-digital conversion.

[0044] The embodiment of the present application further provides an electronic device, including the signal processing device provided by any of the above embodiments, and can achieve the same technical effects. To avoid repetition, it will not be described here.

[0045] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0046] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course 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 the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0047] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A signal processing device, characterized in that: connected to an image sensor, the image sensor including a plurality of pixels distributed in an array, the pixels including a rolling shutter module and a global shutter module, the pixels being connected to a global shutter signal link and a rolling shutter signal link, the output signal of the rolling shutter module and the output signal of the global shutter module output by each pixel being simultaneously output by the global shutter signal link and the rolling shutter signal link respectively; The signal processing device includes: a data selection module, an analog-to-digital conversion module and a digital signal processing module; The data selection module is connected to the pixel via the global shutter signal link and the rolling shutter signal link, and is used to determine a conductive path according to a module type within the pixel, where the module type includes the rolling shutter module and the global shutter module; The analog-to-digital conversion module is connected to the data selection module and is used to convert the output signal of the rolling shutter module and the output signal of the global shutter module into digital signals in parallel; The digital signal processing module is connected to the analog-to-digital conversion module and is used to perform signal processing on the digital signal.

2. The signal processing device according to claim 1, wherein The data selection module includes a first switch and a second switch; A first end of the first switch is connected to an output end of a row or a column of the rolling shutter modules, and a second end of the first switch is connected to an input end of the analog-to-digital conversion module; A first end of the second switch is connected to an output end of a row or a column of the global shutter modules, and a second end of the second switch is connected to an input end of the analog-to-digital conversion module.

3. The signal processing device according to claim 2, wherein: The analog-to-digital conversion module includes: a plurality of first comparators, a plurality of first buffers, a plurality of second comparators and a plurality of second buffers; A first input terminal of each first comparator is connected to an output terminal of a row or a column of the rolling shutter modules, a second input terminal of each first comparator is connected to a reference signal terminal, and an output terminal of each first comparator is connected to an input terminal of one of the first buffers; The first input end of each second comparator is connected to the output end of a row or a column of the global shutter module, the second end of each second comparator is connected to the reference signal terminal, and the output end of each second comparator is connected to the input end of a second buffer.

4. The signal processing device according to claim 3, wherein The signal processing device further includes: an analog signal processing module, the analog signal processing module including a plurality of first analog signal processing units and a plurality of second analog signal processing units; The input end of each of the first analog signal processing units is connected to the output end of a row or a column of the rolling shutter modules, and the output end of each of the first analog signal processing units is connected to the first input end of one of the first comparators; The input end of each second analog signal processing unit is connected to the output end of a row or a column of the global shutter modules, and the output end of each second analog signal processing unit is connected to the first input end of a second comparator.

5. The signal processing device according to claim 1, wherein The data selection module includes a first switch and a second switch; A first end of the first switch is connected to an output end of a row or a column of the rolling shutter modules, and a second end of the first switch is connected to an input end of the analog-to-digital conversion module; A first end of the second switch is connected to an output end of the global shutter module, and a second end of the second switch is connected to an input end of the analog-to-digital conversion module.

6. The signal processing device according to claim 5, characterized in that The analog-to-digital conversion module includes: a plurality of first comparators, a plurality of first buffers, a plurality of second comparators and a plurality of second buffers; A first input terminal of each first comparator is connected to an output terminal of a row or a column of the rolling shutter modules, a second input terminal of each first comparator is connected to a reference signal terminal, and an output terminal of each first comparator is connected to an input terminal of one of the first buffers; The first input end of each second comparator is connected to the output end of one of the global shutter modules, the second input end of each second comparator is connected to the reference signal terminal, and the output end of each second comparator is connected to the input end of one of the second buffers.

7. The signal processing device according to claim 6, characterized in that The signal processing device further includes: an analog signal processing module, the analog signal processing module including a plurality of first analog signal processing units and a plurality of second analog signal processing units; The input end of each of the first analog signal processing units is connected to the output end of a row or a column of the rolling shutter modules, and the output end of each of the first analog signal processing units is connected to the first input end of one of the first comparators; The input end of each second analog signal processing unit is connected to the output end of one of the global shutter modules, and the output end of each first analog signal processing unit is connected to the first input end of one of the second comparators.

8. The signal processing device according to claim 3 or 6, characterized in that: The reference signal terminal is a ramp signal generator, and the signal processing device further includes: a counter; The counter is connected to the input end of the first buffer, and when the output signal of the ramp signal generator is lower than the output signal of the rolling shutter module, the counter increases one bit to the first buffer; The counter is connected to an input end of the second buffer. When the output signal of the ramp signal generator is lower than the output signal of the global shutter module, the counter adds one bit to the second buffer.

9. The signal processing device according to claim 4 or 7, characterized in that: The first analog signal processing unit and the second analog signal processing unit each include: a noise reduction circuit and an amplifier; The input end of the noise reduction circuit is connected to the output end of the pixel, the output end of the noise reduction circuit is connected to the input end of the amplifier, and the output end of the amplifier is connected to the input end of the analog-to-digital conversion module.

10. An electronic device, characterized in that: The method comprises the signal processing device according to any one of claims 1 to 9.

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