Detection circuit, image sensor, driving circuit of image sensor and electronic equipment

Abstract

The invention discloses a detection circuit, an image sensor, a driving circuit of the image sensor and electronic equipment, relates to the technical field of sensors, and aims to improve the imaging accuracy of the image sensor. The detection circuit comprises a pulse detection sub-circuit. And the pulse detection sub-circuit is used for acquiring a pulse command signal from the image signal processing circuit, and the pulse command signal is also used for controlling the row driving circuit to output a pixel control signal. The pulse detection sub-circuit is further used for obtaining a first control signal, the first control signal is used for representing a pixel control signal output by the row driving circuit to the pixel array, and the pixel control signal is used for controlling the enabling of a target pixel in the pixel array. The pulse detection sub-circuit is further used for generating a detection pulse signal according to the pulse command signal and the first control signal and judging whether the pulse command signal is matched with the detection pulse signal or not.

Description

Technical Field

[0001] The present invention relates to the field of sensor technology, and in particular to a detection circuit, an image sensor and a driving circuit thereof, and an electronic device. Background Art

[0002] In recent years, vehicles with driving assistance functions have become common. Through the driving assistance function, the scene in front of the vehicle is collected, and the vehicle lane, vehicles in front of the vehicle, pedestrians rushing into the lane, etc. are identified based on the collected images to avoid possible loss of life and property.

[0003] As an important circuit unit of the driving assistance function, if the image sensor fails during operation, it will generate erroneous image signals and fail to provide proper driving assistance. The driving assistance function may not be able to avoid danger. Summary of the invention

[0004] The purpose of the present invention is to provide a detection circuit, an image sensor and its driving circuit, and an electronic device, aiming to improve the accuracy of sensor imaging.

[0005] To achieve the above object, the present invention adopts the following technical solution.

[0006] The present invention provides a detection circuit. The detection circuit includes a pulse detection subcircuit. The pulse detection subcircuit is used to obtain a pulse command signal from an image signal processing circuit, and the pulse command signal is used to control a row driving circuit to output a pixel control signal. The pulse detection subcircuit is also used to obtain a first control signal, and the first control signal is used to represent a pixel control signal output by the row driving circuit to a pixel array, and the pixel control signal is used to control the target pixel in the pixel array to be enabled.

[0007] The pulse detection subcircuit is further used to generate a detection pulse signal according to the pulse command signal and the first control signal, and to determine whether the pulse command signal matches the detection pulse signal.

[0008] The pull-up process of the pixel control signal supplied by the row driving circuit is relatively slow. Therefore, if the pulse command signal output by the image signal processing circuit is directly compared with the pixel control signal output by the row driving circuit according to the pulse command signal to see whether they match, a longer glitch duration will appear, which is likely to cause a misjudgment of functional safety.

[0009] The detection circuit provided in the embodiment of the present application, when judging whether the pixel control signal output by the row driving circuit has a pulse output fault, first generates a detection pulse signal according to the pulse command signal output by the image signal processing circuit and the first control signal used to characterize the pixel control signal output by the row driving circuit to the pixel array, and then compares the pulse command signal with the detection pulse signal, thereby judging whether the pulse command signal matches the detection pulse signal. In this way, the possibility of safety misjudgment that may be caused by the delay in the pull-up process of the pixel control signal is reduced.

[0010] In some embodiments, the waveform of the pulse command signal has a first voltage edge and a second voltage edge, the waveform of the first control signal has a third voltage edge and a fourth voltage edge, and the waveform of the detection pulse signal has a fifth voltage edge, which is generated according to one of the first voltage edge and the third voltage edge.

[0011] In some embodiments, a slope of the third voltage edge is greater than a slope of the fourth voltage edge, and the fifth voltage edge is generated according to the third voltage edge.

[0012] In some embodiments, the waveform of the detection pulse signal further has a sixth voltage edge, the sixth voltage edge is generated according to one of the second voltage edge and the fourth voltage edge; and the voltage edges according to which the fifth voltage edge and the sixth voltage edge are generated belong to different signals.

[0013] In some embodiments, a slope of the third voltage edge is greater than a slope of the fourth voltage edge, and the sixth voltage edge is generated according to the second voltage edge.

[0014] In some embodiments, determining whether the detection pulse signal matches the pulse command signal includes: determining whether the time difference between the first voltage edge of the pulse command signal and the fifth voltage edge of the detection pulse signal is within a first preset range, and obtaining a first determination result.

[0015] In some embodiments, determining whether the detection pulse signal matches the pulse command signal further includes: determining whether the time difference between the second voltage edge of the pulse command signal and the sixth voltage edge of the detection pulse signal is within a first preset range to obtain a second determination result.

[0016] Based on the fact that both the first judgment result and the second judgment result are matched, it is determined that the detection pulse signal matches the pulse command signal; based on the fact that at least one of the first judgment result and the second judgment result is not matched, it is determined that the detection pulse signal does not match the pulse command signal.

[0017] In some embodiments, when the detection pulse signal matches the pulse command signal, a first matching result is output to the image processing circuit; the first matching result is used to indicate that the pixel control signal output by the row driving circuit is a correct pixel control signal.

[0018] When the detection pulse signal does not match the pulse command signal, a second matching result is output to the image processing circuit; the second matching result is used to indicate that the pixel control signal output by the row driving circuit is an erroneous pixel control signal.

[0019] In some embodiments, the pulse detection subcircuit includes a trigger, a first input terminal of the trigger is electrically connected to the image signal processing circuit, and a second input terminal of the trigger is used to receive a first control signal. The trigger is used to output a detection pulse signal according to the pulse command signal output by the image processing circuit and the received first control signal.

[0020] In some embodiments, the pulse detection subcircuit further includes a logic gate circuit, wherein a first input terminal of the logic gate circuit is electrically connected to an output terminal of the trigger, and a second input terminal of the logic gate circuit is electrically connected to an image signal processing circuit. The logic gate circuit is used to determine whether the pulse command signal and the detection pulse signal match based on the pulse command signal output by the image processing circuit and the detection pulse signal output by the trigger.

[0021] In some embodiments, the pulse detection subcircuit further includes a buffer, the input end of the buffer is electrically connected to the output end of the logic gate circuit, and the output end of the buffer is electrically connected to the input end of the image signal processing circuit. The buffer is used to receive the pulse command signal and the judgment result of whether the detection pulse signal matches, and output the judgment result to the image signal processing circuit.

[0022] In some embodiments, the pixel control signal includes a plurality of sub-control signals; the pulse detection sub-circuit includes a plurality of pulse detection units, each of which includes a trigger, a logic gate circuit, and a buffer electrically connected in sequence. The triggers of the plurality of pulse detection units are respectively used to receive the plurality of sub-control signals of the pixel control signal.

[0023] In some embodiments, the detection circuit further includes a conversion subcircuit, and the pulse detection subcircuit is connected to the conversion subcircuit. The conversion subcircuit is used to obtain a pixel control signal from the row driving circuit, and perform voltage reduction processing on the pixel control signal to obtain a first control signal, and output the first control signal to the pulse detection subcircuit; the voltage of the first control signal is lower than the voltage of the pixel control signal.

[0024] In some embodiments, the conversion subcircuit includes an amplifying device and a switching device.

[0025] The first end of the amplifier device is connected to the ground end, the second end of the amplifier device is connected to the first end of the switch device, and the third end of the amplifier device is connected to the row driving circuit. The amplifier device is used to receive the pixel control signal and perform voltage reduction processing on the pixel control signal.

[0026] The second end of the switch device is connected to the pulse detection subcircuit, and the third end of the switch device is connected to the row drive circuit. The switch device is used to output the pixel control signal after voltage reduction from the amplifier device under the control of the row selection signal output by the row drive circuit. The row selection signal is used to indicate the row address of the target pixel corresponding to the pixel control signal in the pixel array.

[0027] In some embodiments, the amplifier device includes a first transistor, a first electrode of the first transistor is connected to a first terminal of the amplifier device, a second electrode of the first transistor is connected to a second terminal of the amplifier device, and a control electrode of the first transistor is connected to a third terminal of the amplifier device.

[0028] The switch device includes a second transistor, a first electrode of the second transistor is connected to the first terminal of the switch device, a second electrode of the second transistor is connected to the second terminal of the switch device, and a control electrode of the second transistor is connected to the third terminal of the switch device.

[0029] In some embodiments, the pixel control signal includes multiple sub-control signals; the conversion sub-circuit includes multiple conversion units, each conversion unit includes an amplifier device and a switch device connected to each other. The amplifier devices of the multiple conversion units are respectively used for receiving multiple sub-control signals of the pixel control signal.

[0030] In some embodiments, the detection circuit further includes a bias subcircuit, the output end of the bias subcircuit is electrically connected to the second end of the switch device of the conversion subcircuit, and the bias subcircuit is used to provide a bias current for the conversion subcircuit.

[0031] In some embodiments, the bias subcircuit includes a plurality of current source devices, and an output terminal of each current source device is electrically connected to a second terminal of a switch device of a conversion unit. The current source device is used to output a bias current to the conversion unit.

[0032] In some embodiments, the pulse detection subcircuit is connected to the row driving circuit. The pulse detection subcircuit is specifically used to obtain a pixel control signal from the row driving circuit and use the pixel control signal as the first control signal.

[0033] In some embodiments, the detection circuit further includes a row selection detection subcircuit. The row selection detection subcircuit is used to obtain predetermined row address command information from the image signal processing circuit; the predetermined row address command information is used to specify the row address of the target pixel in the pixel array. The row selection detection subcircuit is also used to obtain predetermined row address selection information from the row driving circuit; the predetermined row address selection information is used to indicate the row address of the pixel selected by the row driving circuit according to the predetermined row address command information in the pixel array. The row selection detection subcircuit is also used to determine whether the predetermined row address command information and the predetermined row address selection information match.

[0034] In some embodiments, determining whether the predetermined row address command information and the predetermined row address selection information match includes: determining whether the row address of the target pixel specified by the predetermined row address command information in the pixel array and the row address of the pixel corresponding to the predetermined row address selection information in the pixel array are the same row address, and obtaining a third judgment result.

[0035] In some embodiments, determining whether the predetermined row address command information and the predetermined row address selection information match also includes: inverting the phase of the predetermined row address command information and the predetermined row address selection information; determining whether the predetermined row address command information and the predetermined row address selection information after the phase inversion are the same row address, and obtaining a fourth judgment result; determining that the predetermined row address command information and the predetermined row address selection information match based on that the third judgment result and the fourth judgment result are both matches; determining that the predetermined row address command information and the predetermined row address selection information do not match based on that at least one of the third judgment result and the fourth judgment result is a mismatch.

[0036] In some embodiments, when the predetermined row address command information and the predetermined row address selection information match, a third matching result is output to the image processing circuit; the third matching result is used to characterize that the row address of the pixel selected by the row driving circuit according to the predetermined row address command information in the pixel array is the correct row address.

[0037] When the predetermined row address command information and the predetermined row address selection information do not match, a fourth matching result is output to the image processing circuit; the fourth matching result is used to indicate that the row address of the pixel selected by the row driving circuit according to the predetermined row address command information in the pixel array is an incorrect row address.

[0038] The present invention also provides a driving circuit for an image sensor. The driving circuit for the image sensor comprises: an image signal processing circuit, a row driving circuit and a detection circuit as provided in any of the above embodiments. The image signal processing circuit is used to output a pulse command signal.

[0039] The row driving circuit is electrically connected to the image signal processing circuit. The row driving circuit is used to obtain the pulse command signal output by the image signal processing circuit, and output a pixel control signal to the pixel array according to the pulse command signal. The pixel control signal is used to control the target pixel in the pixel array to enable.

[0040] The detection circuit is electrically connected to the image signal processing circuit. The detection circuit is used to obtain the pulse command signal output by the image signal processing circuit, and obtain the first control signal used to characterize the pixel control signal, generate a detection pulse signal according to the pulse command signal and the first control signal, and determine whether the detection pulse signal matches the pulse command signal.

[0041] In some embodiments, the image signal processing circuit is further used to output predetermined row address command information; the predetermined row address command information is used to specify the row address of the target pixel in the pixel array.

[0042] The row driving circuit is further configured to receive a predetermined row address command, select pixels in the pixel array according to the predetermined row address command information, and output predetermined row address selection information including a row address of the selected pixel.

[0043] The detection circuit is also used to obtain the predetermined row address command information and the predetermined row address selection information, and determine whether the predetermined row address command information and the predetermined row address selection information match.

[0044] The present invention also provides an image sensor. The image sensor comprises: a pixel array and a driving circuit of the image sensor, wherein a row driving circuit in the driving circuit is electrically connected to the pixel array.

[0045] In some embodiments, the image sensor further comprises: a first substrate and a second substrate stacked together; the pixel array is disposed in the central area of ​​the first substrate and directly above the second substrate; and the driving circuit of the image sensor is disposed on the second substrate.

[0046] The present invention also provides an electronic device, which includes the sensor provided by any of the above embodiments, and the circuit board is electrically connected to the image sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0048] Figure 1 is a planar structural diagram of a first substrate and a second substrate of an image sensor according to some embodiments;

[0049] Figure 2 is a schematic diagram of connections between a detection circuit, an image processing circuit, and a row driving circuit of an image sensor according to some embodiments;

[0050] Figure 3 is a detection flow chart of a pulse detection subcircuit according to some embodiments;

[0051] Figure 4 is another detection flow chart of a pulse detection subcircuit according to some embodiments;

[0052] Figure 5is a waveform diagram of a pulse command signal, a first control signal, and a detection pulse signal according to some embodiments;

[0053] Figure 6 is a structural diagram of a pulse detection subcircuit according to some embodiments;

[0054] Figure 7 is a structural diagram of a conversion subcircuit according to some embodiments;

[0055] Figure 8 is a detection flow chart of a row selection detection subcircuit according to some embodiments.

[0056] Reference numerals:

[0057] 1. Trigger; 2. Logic gate circuit; 3. Buffer;

[0058] Q1, first transistor; Q2, second transistor. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside" and the like indicate directions or positional relationships based on the directions or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Unless otherwise specified, the above-mentioned directional description can be flexibly set in the process of actual application under the condition that the relative positional relationship shown in the accompanying drawings is satisfied.

[0061] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0062] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the embodiments of the present invention, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, article or device including the element.

[0064] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0065] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0066] Some embodiments of the present application provide an electronic device, which includes a circuit board and an image sensor, wherein the circuit board is electrically connected to the image sensor.

[0067] Exemplarily, the electronic device may be (but not limited to) a mobile phone, a GPS receiver / navigator, a camera, a camcorder, a flat panel display, a computer monitor, a car display (e.g., an odometer display, etc.), a navigator, a cockpit controller and / or display, a display of a camera view (e.g., a display of a rearview camera in a vehicle), etc.

[0068] Specifically, the electronic device having the image sensor may be applied in the field of vehicle-mounted electronics or in other fields.

[0069] The application of image sensors in the automotive field includes, but is not limited to, reversing image components, electronic rearview mirror components, 360-degree panoramic imaging components, collision avoidance systems, advanced driver assistance systems (ADAS) and autonomous driving systems.

[0070] In some embodiments, Figure 1 As shown, the image sensor includes a first substrate, a second substrate, a pixel array and a driving circuit. The second substrate is stacked with the first substrate, the pixel array is arranged on the first substrate and located above the second substrate, and the driving circuit of the image sensor is arranged on the second substrate.

[0071] In some embodiments, Figure 1 As shown, the first substrate includes at least one first through hole penetrating the first substrate along the stacking direction of the first substrate and the second substrate, and the at least one first through hole is located on at least one side of the pixel array. The second substrate includes at least one second through hole penetrating the at least one first through hole along the stacking direction of the first substrate and the second substrate. The pixel array is electrically connected to the image processing circuit through the first through hole and the second through hole.

[0072] For example, Figure 1 As shown, the first substrate includes at least one of the first through hole TCV11, the first through hole TCV12, the first through hole TCV13 and the first through hole TCV14. Correspondingly, the second substrate includes at least one of the second through hole TCV21, the second through hole TCV22, the second through hole TCV23 and the second through hole TCV24.

[0073] Along the stacking direction of the first substrate and the second substrate, the first through hole TCV11 is connected to the second through hole TCV21, the first through hole TCV12 is connected to the second through hole TCV22, the first through hole TCV13 is connected to the second through hole TCV23, and the first through hole TCV14 is connected to the second through hole TCV24.

[0074] The pixel array and the image processing circuit can be electrically connected through the first through hole TCV11 and the second through hole TCV21, the first through hole TCV12 and the second through hole TCV22, the first through hole TCV13 and the second through hole TCV23, or at least one group of through holes among the first through hole TCV14 and the second through hole TCV24.

[0075] For example, Figure 1As shown, the driving circuit of the image sensor includes: the driving circuit of the image sensor includes: an image signal processing circuit (Image Signal Processor, ISP), a row driving circuit and a detection circuit. The image processing circuit, the row driving circuit and the detection circuit are arranged on the second substrate.

[0076] The row driving circuit in the driving circuit of the image sensor is electrically connected to the pixel array, and the image signal processing circuit is also electrically connected to the detection circuit. The row driving circuit is electrically connected to the image signal processing circuit, and the row driving circuit is also electrically connected to the detection circuit.

[0077] The image signal processing circuit supplies command information specifying a predetermined row address and a pulse command signal controlling the pixel specified by the address information to the row driving circuit and the row driving fault detection circuit. The row driving fault detection circuit may be the detection circuit provided in some embodiments of the present application.

[0078] The row driving circuit generates a control signal to reset and accumulate the pixel control signal from each pixel of the pixel array, and reads the reset level and signal level of the pixel control signal. At the same time, when the row driving circuit outputs the pixel control signal, it compiles the obtained row address information into binary code information again and supplies it to the row driving fault detection circuit.

[0079] The pixel array obtains the pixel control signal supplied by the row driving circuit, and controls the pixel row specified by the pixel row address selection information to perform operations such as reset, exposure and readout at an appropriate time node according to the obtained pixel control signal.

[0080] Specifically, in some embodiments, the image signal processing circuit is used to output predetermined row address command information; the predetermined row address command information is used to specify the row address of the target pixel in the pixel array.

[0081] The row driving circuit is used to receive a predetermined row address command, select pixels in the pixel array according to the predetermined row address command information, and output predetermined row address selection information including the row address of the selected pixel.

[0082] Based on this, the detection circuit is used to obtain the predetermined row address command information and the predetermined row address selection information, and determine whether the predetermined row address command information and the predetermined row address selection information match.

[0083] The detection circuit determines whether there is an address selection function failure in the row driving circuit by judging whether the row address information of the target pixel specified by the image signal processing circuit and the row address information of the target pixel actually selected by the row driving circuit (the row address information in the pixel array selected by the row driving circuit) match (whether they are the same row address information).

[0084] When the row address information designated by the image signal processing circuit matches the row address information actually selected by the row driving circuit (they are the same row address information), the detection circuit determines that the address selection function of the row driving circuit is normal.

[0085] When the row address information designated by the image signal processing circuit does not match the row address information actually selected by the row driving circuit (they are different row address information), the detection circuit determines that the address selection function of the row driving circuit is abnormal.

[0086] In some embodiments, the image signal processing circuit is further used to output a pulse command signal; the pulse command signal is used to control the pixels indicated by the predetermined row address command signal.

[0087] The row driving circuit is also used to obtain the pulse command signal output by the image signal processing circuit, and output a pixel control signal to the pixel array according to the pulse command signal; the pixel control signal is used to control the target pixel in the pixel array to enable.

[0088] Based on this, the detection circuit is also used to obtain the pulse command signal output by the image signal processing circuit, and to obtain the first control signal used to characterize the pixel control signal, to generate a detection pulse signal according to the pulse command signal and the first control signal, and to determine whether the detection pulse signal matches the pulse command signal.

[0089] The detection circuit determines whether there is a pulse output function failure in the row drive circuit by judging whether the pulse command signal output by the image signal processing circuit and the first control signal used to characterize the pixel control signal match (whether the signal pulses of the pulse command signal and the first control signal are the same, or whether the time difference of the rising edge / falling edge of the signal pulse is within the allowable range).

[0090] When the pulse command signal output by the image signal processing circuit matches the first control signal used to characterize the pixel control signal (the signal pulses of the pulse command signal and the first control signal are the same, or the time difference between the rising edge / falling edge of the signal pulse is within the allowable range), the detection circuit determines that the addressing pulse output function of the row drive circuit is normal.

[0091] When the pulse command signal output by the image signal processing circuit does not match the first control signal used to characterize the pixel control signal (the signal pulses of the pulse command signal and the first control signal are different, or the time difference of the rising edge / falling edge of the signal pulse is not within the allowable range), the detection circuit determines that the addressing pulse output function of the row driving circuit is abnormal.

[0092] In some embodiments of the related technology, the pulse detection subcircuit obtains the pulse command signal output by the image signal processing circuit and the pixel control signal output by the row driving circuit, and determines whether the pulse command signal and the pixel control signal match, and determines whether there is a pulse output fault in the row driving circuit based on the matching result.

[0093] In this case, since the pull-up process of the pixel control signal supplied by the row driving circuit is relatively slow, when directly comparing the pulse command signal output by the image signal processing circuit and the pixel control signal output by the row driving circuit, a longer glitch duration will appear, which is likely to cause a misjudgment of functional safety.

[0094] Based on this, the present invention proposes a pulse detection subcircuit, which is used to reduce the burrs caused by the comparison of the pulse detection subcircuit and improve the detection accuracy of the pulse detection subcircuit.

[0095] In some embodiments, Figure 1 and Figure 2 As shown, the detection circuit includes a pulse detection subcircuit. The pulse detection subcircuit is used to obtain a pulse command signal from the image signal processing circuit, and the pulse command signal is used to control the row drive circuit to output a pixel control signal. The pulse detection subcircuit is also used to obtain a first control signal, and the first control signal is used to represent the pixel control signal output by the row drive circuit to the pixel array, and the pixel control signal is used to control the target pixel in the pixel array to enable.

[0096] like Figure 3 and Figure 4 As shown, the pulse detection subcircuit is also used to generate a detection pulse signal according to the pulse command signal and the first control signal, and to determine whether the pulse command signal matches the detection pulse signal.

[0097] The detection circuit provided in the embodiment of the present application, when determining whether there is a pulse output fault in the pixel control signal output by the row driving circuit, first generates a detection pulse signal based on the pulse command signal output by the image signal processing circuit and the first control signal obtained for characterizing the pixel control signal output by the row driving circuit to the pixel array, and then compares the pulse command signal with the detection pulse signal to determine whether the pulse command signal and the detection pulse signal match.

[0098] Taking the pulse output fault detection of the pixel reset control signal RST as an example, the pulse detection subcircuit compares the pulse command signal ISP_CON output from the image signal processing circuit ISP to control the specified pixel with the generated detection pulse RST_DET. In this way, the possibility of safety misjudgment caused by the delay in the pull-up process of the pixel control signal (for example, the pixel reset control signal RST) is reduced.

[0099] If the pulse command signal matches the detection pulse signal, the pulse detection subcircuit determines that the row driver circuit outputs a correct pixel control signal. If the pulse command signal does not match the detection pulse signal, the pulse detection subcircuit determines that the row driver circuit outputs an incorrect pixel control signal.

[0100] In some embodiments, Figure 5 As shown, the waveform of the pulse command signal has a first voltage edge and a second voltage edge, and the waveform of the first control signal has a third voltage edge and a fourth voltage edge. The waveform of the detection pulse signal has a fifth voltage edge and a sixth voltage edge, the fifth voltage edge is generated according to one of the first voltage edge and the third voltage edge, and the sixth voltage edge is generated according to one of the second voltage edge and the fourth voltage edge; and the voltage edges according to which the fifth voltage edge and the sixth voltage edge are generated belong to different signals.

[0101] Exemplarily, determining whether the detection pulse signal matches the pulse command signal includes: determining whether the time difference between the first voltage edge of the pulse command signal and the fifth voltage edge of the detection pulse signal is within a first preset range, and obtaining a first judgment result; and determining whether the time difference between the second voltage edge of the pulse command signal and the sixth voltage edge of the detection pulse signal is within the first preset range, and obtaining a second judgment result.

[0102] Based on the first judgment result and the second judgment result both matching, it is determined that the detection pulse signal matches the pulse command signal. Based on at least one of the first judgment result and the second judgment result not matching, it is determined that the detection pulse signal does not match the pulse command signal.

[0103] When the detection pulse signal matches the pulse command signal, a first matching result is output to the image processing circuit; the first matching result is used to indicate that the pixel control signal output by the row drive circuit is a correct pixel control signal. When the detection pulse signal does not match the pulse command signal, a second matching result is output to the image processing circuit; the second matching result is used to indicate that the pixel control signal output by the row drive circuit is an incorrect pixel control signal, and there is a pulse output fault in the row drive circuit.

[0104] Exemplarily, the slope of the third voltage edge is greater than the slope of the fourth voltage edge. The fifth voltage edge is generated according to the third voltage edge, and the sixth voltage edge is generated according to the second voltage edge.

[0105] Specifically, Figure 5 As shown, the pulse detection subcircuit may generate a detection pulse signal according to the falling edge of the pulse command signal and the falling edge of the control pulse.

[0106] like Figure 5As shown, the pulse detection subcircuit receives the control pulse signal supplied by the conversion subcircuit, collects the falling edge of the pulse command signal ISP_CON for controlling the designated pixel provided by the image signal processing circuit and the falling edge of the control pulse signals such as SEL_CON and RST_CON generated by the conversion subcircuit, and generates detection pulse signals SEL_DET, TG_DET, RST_DET, etc.

[0107] Since the detection pulse signal generated by the pulse detection subcircuit is a pulse with steep rising and falling edges, the glitches in the comparison result are only caused by the delay between the falling edge of the control pulse and the rising edge of the pixel pulse command signal (duration is about 2ns to 3ns), eliminating the long rise time of the control pulse signal, which is the main cause of detection errors in the pulse detection subcircuit. It can effectively reduce the comparison signal glitches caused by the slow rise time of the control pulse signal and the delay of the row drive circuit, and improve the accuracy of the pulse detection subcircuit.

[0108] In some embodiments, Figure 6 and Figure 7 As shown, the pulse detection subcircuit includes a trigger 1, a first input end of the trigger 1 is electrically connected to the image signal processing circuit, and a second input end of the trigger 1 is used to receive a first control signal. The trigger 1 is used to output a detection pulse signal according to the pulse command signal output by the image processing circuit and the received first control signal.

[0109] Exemplarily, the trigger may be a D trigger, which collects the falling edge of the pulse command signal for controlling the designated pixel provided by the image signal processing circuit and the falling edge of the control pulse generated by the conversion subcircuit, and generates a detection pulse with a steep edge.

[0110] In some embodiments, Figure 6 As shown, the pulse detection subcircuit further includes a logic gate circuit 2, a first input end of the logic gate circuit 2 is electrically connected to the output end of the trigger 1, and a second input end of the logic gate circuit 2 is electrically connected to the image signal processing circuit. The logic gate circuit 2 is used to determine whether the pulse command signal and the detection pulse signal match based on the pulse command signal output by the image processing circuit and the detection pulse signal output by the trigger 1.

[0111] For example, Figure 6 As shown, the logic gate circuit may be an XOR gate circuit, which compares the detection pulse SEL_DET with the pulse command signal ISP_CON for controlling a designated pixel provided by the image signal processing circuit.

[0112] In some embodiments, Figure 6As shown, the pulse detection subcircuit further includes a buffer 3, the input end of the buffer 3 is electrically connected to the output end of the logic gate circuit 2, and the output end of the buffer 3 is electrically connected to the input end of the image signal processing circuit. The buffer 3 is used to receive the pulse command signal and the judgment result of whether the detection pulse signal matches, and output the judgment result to the image signal processing circuit.

[0113] Exemplarily, the buffer may be a buffer.

[0114] like Figure 6 As shown, the logic gate circuit outputs the comparison result through the buffer circuit. The buffer provides a larger resistance and capacitance, and the buffer can further remove the burrs with a duration of 2ns to 3ns in the comparison result by charging and discharging the capacitance.

[0115] In some embodiments, Figure 6 and Figure 7 As shown, the pixel control signal includes multiple sub-control signals; the pulse detection sub-circuit includes multiple pulse detection units, each of which includes a trigger 1, a logic gate circuit 2 and a buffer 3 electrically connected in sequence. The triggers 1 of the multiple pulse detection units are respectively used to receive multiple sub-control signals of the pixel control signal.

[0116] In some embodiments, Figure 7 As shown, the detection circuit also includes a conversion subcircuit, and the pulse detection subcircuit is connected to the conversion subcircuit. The conversion subcircuit is used to obtain a pixel control signal from the row drive circuit, and perform voltage reduction processing on the pixel control signal to obtain a first control signal, and output the first control signal to the pulse detection subcircuit. The voltage of the first control signal is lower than the voltage of the pixel control signal.

[0117] Exemplarily, the voltage reduction processing of the pixel control signal by the conversion subcircuit may be that the conversion subcircuit performs voltage domain conversion on the pixel control signal.

[0118] In some examples, the row driving circuit and the pulse detection subcircuit in the image sensor have different voltage sources, so the row driving circuit and the pulse detection subcircuit are in different voltage domains. When the electrical signal flows between the row driving circuit and the pulse detection subcircuit, the electrical signal needs to be converted into a voltage domain.

[0119] For example, when the row driving circuit transmits an electrical signal to the pulse detection subcircuit, the voltage of the electrical signal (such as the pixel control signal) output by the row driving circuit needs to be converted from the voltage of the voltage domain where the row driving circuit is located to the voltage of the voltage domain where the pulse detection subcircuit is located.

[0120] Voltage domain conversion refers to the process of converting the voltage level of the electrical signal output by the row driving circuit to the voltage level of the pulse detection sub-circuit voltage domain.

[0121] Based on the above, when the voltage sources of the row drive circuit and the pulse detection subcircuit in the image sensor are the same, then the row drive circuit and the pulse detection subcircuit are in the same voltage domain. In this case, the electrical signal output by the row drive circuit can be directly transmitted to the pulse detection subcircuit without the need for voltage domain conversion. When the voltage sources of the row drive circuit and the pulse detection subcircuit in the image sensor are different, then the row drive circuit and the pulse detection subcircuit are in different voltage domains. In this case, the electrical signal output by the row drive circuit needs to be converted in the voltage domain before being transmitted to the pulse detection subcircuit.

[0122] For example, Figure 7 As shown, the conversion subcircuit includes an amplifier device and a switch device.

[0123] The first end of the amplifier device is connected to the ground end, the second end of the amplifier device is connected to the first end of the switch device, and the third end of the amplifier device is connected to the row driving circuit. The amplifier device is used to receive the pixel control signal and perform voltage reduction processing on the pixel control signal.

[0124] The amplifying device includes a first transistor Q1, a first electrode of the first transistor Q1 is connected to a first terminal of the amplifying device, a second electrode of the first transistor Q1 is connected to a second terminal of the amplifying device, and a control electrode of the first transistor Q1 is connected to a third terminal of the amplifying device.

[0125] The second end of the switch device is connected to the pulse detection subcircuit, and the third end of the switch device is connected to the row drive circuit. The switch device is used to output the pixel control signal after voltage reduction from the amplifier device under the control of the row selection signal output by the row drive circuit. The row selection signal is used to indicate the row address of the target pixel corresponding to the pixel control signal in the pixel array.

[0126] The switch device includes a second transistor Q2, a first electrode of the second transistor Q2 is connected to a first terminal of the switch device, a second electrode of the second transistor Q2 is connected to a second terminal of the switch device, and a control electrode of the second transistor Q2 is connected to a third terminal of the switch device.

[0127] In some embodiments, Figure 7 As shown, the pixel control signal includes multiple sub-control signals; the conversion sub-circuit includes multiple conversion units, each conversion unit includes an amplifier device and a switch device connected to each other. The amplifier devices of the multiple conversion units are respectively used for receiving multiple sub-control signals of the pixel control signal.

[0128] like Figure 7As shown, the first transistor Q1 is turned on under the control of the pixel control signal output by the row driving circuit, amplifies the pixel control signal provided by the row driving circuit, and outputs the amplified pixel control signal (control pulse signal) to the first electrode of the second transistor Q2.

[0129] The second transistor is turned on under the control of the row address selection signal output by the row driving circuit, and controls the pulse signal to be output to the pulse detection subcircuit; the row address selection signal is used to indicate the row address of the pixel in the pixel array corresponding to the pixel control signal currently output by the row driving circuit.

[0130] Specifically, Figure 7 As shown, the control electrode of the first transistor Q1 located at the bottom collects the pixel control signal output by the row driving circuit, and after amplifying the pixel control signal, outputs it from the second electrode of the first transistor Q1 to the first electrode of the second transistor Q2. The control electrode of the second transistor Q2 located at the top collects the row address selection signal Row-SEL output by the row driving circuit, and outputs the amplified pixel control signal (control pulse signal) obtained by the first electrode of the second transistor Q according to the row.

[0131] The conversion subcircuit has only two transistors on each current path, which can reduce power consumption and reduce the burr phenomenon that occurs during comparison in the pulse detection subcircuit.

[0132] In some embodiments, Figure 7 As shown, the first terminals of the amplifying devices of the plurality of conversion units are connected to each other. The first electrodes of the first transistors Q1 of the plurality of amplifying devices are connected to each other.

[0133] In some embodiments, Figure 7 As shown, the detection circuit further includes a bias subcircuit, the output end of the bias subcircuit is electrically connected to the second end of the switch device of the conversion subcircuit. The bias subcircuit is used to provide a bias current for the conversion subcircuit.

[0134] Exemplarily, the bias subcircuit includes a plurality of current source devices, and the output end of each current source device is electrically connected to the second end of the switch device of a conversion unit. The current source device is used to output a bias current to the conversion unit.

[0135] The bias circuit can provide bias current for the conversion subcircuit. At the moment of data switching, completely different voltage or current output will generate noise in the output analog signal. The thermometer code value can control the bias circuit to provide a suitable current gear to shorten the pull-up time of the control pulse signal and reduce the error caused by the burrs that appear during the comparison of the pulse detection subcircuit.

[0136] Exemplarily, the bias circuit may be a circuit that uses a thermometer code mode to control a current source to provide a bias current for the conversion subcircuit. The bias circuit uses a thermometer code mode to control the output current value of the current source corresponding to each conversion subcircuit according to the signal transmitted on the conversion subcircuit, so as to provide a suitable bias current for the conversion subcircuit.

[0137] In some embodiments, Figure 4 As shown, the pulse detection subcircuit is connected to the row driving circuit. The pulse detection subcircuit is specifically used to obtain a pixel control signal from the row driving circuit and use the pixel control signal as the first control signal.

[0138] Based on the above embodiment, when the pulse detection subcircuit performs pulse output fault detection on the row driving circuit, Figure 4 As shown, the pixel control signal output by the row driving circuit may be used as the first control signal, or, as shown in FIG. Figure 3 As shown, the control pulse signal output by the conversion sub-circuit can also be used as the first control signal. In practical applications, there is no specific limitation and it can be flexibly selected according to the actual application scenario.

[0139] In some embodiments, Figure 8 As shown, the detection circuit also includes a row selection detection subcircuit. The row selection detection subcircuit is used to obtain predetermined row address command information from the image signal processing circuit; the predetermined row address command information is used to specify the row address of the target pixel in the pixel array. The row selection detection subcircuit is also used to obtain predetermined row address selection information from the row driving circuit; the predetermined row address selection information is used to indicate the row address of the pixel selected by the row driving circuit according to the predetermined row address command information in the pixel array. The row selection detection subcircuit is also used to determine whether the predetermined row address command information and the predetermined row address selection information match.

[0140] The row selection detection subcircuit in the fault detection circuit determines whether the command information of the predetermined row address obtained above matches the selection information. If the row address command information matches the row address selection information, a result is obtained that the row address selection function of the row driving circuit is fault-free, and the row address selection function fault detection process ends. If the row address command information does not match the row address selection information, a result is obtained that the row address selection function of the row driving circuit is faulty, and this result is fed back to the corresponding processing circuit, and the row address selection function fault detection process ends.

[0141] In some embodiments, determining whether the predetermined row address command information and the predetermined row address selection information match includes: determining whether the row address of the target pixel specified by the predetermined row address command information in the pixel array and the row address of the pixel corresponding to the predetermined row address selection information in the pixel array are the same row address, and obtaining a third judgment result.

[0142] When the row selection detection subcircuit is working, it ensures whether there is any abnormality in the address selection function of the row driving circuit by comparing the command information and the selection information of the predetermined row address of the original phase.

[0143] When the row address of the target pixel specified by the predetermined row address command information in the pixel array and the row address of the pixel corresponding to the predetermined row address selection information in the pixel array are the same row address, it is determined that the predetermined row address command information and the predetermined row address selection information match.

[0144] When the row address of the target pixel in the pixel array specified by the predetermined row address command information and the row address of the pixel in the pixel array corresponding to the predetermined row address selection information are different row addresses, it is determined that the predetermined row address command information and the predetermined row address selection information do not match.

[0145] In other embodiments, determining whether the predetermined row address command information and the predetermined row address selection information match further includes: inverting the phase of the predetermined row address command information and the predetermined row address selection information; determining whether the predetermined row address command information and the predetermined row address selection information after the phase inversion are the same row address, to obtain a fourth determination result.

[0146] When the row address of the target pixel in the pixel array specified by the phase-inverted predetermined row address command information and the row address of the pixel in the pixel array corresponding to the predetermined row address selection information are the same row address, it is determined that the predetermined row address command information and the predetermined row address selection information match.

[0147] When the row address of the target pixel in the pixel array specified by the phase-inverted predetermined row address command information and the row address of the pixel in the pixel array corresponding to the predetermined row address selection information are different row addresses, it is determined that the predetermined row address command information and the predetermined row address selection information do not match.

[0148] When the row selection detection subcircuit performs matching judgments on the predetermined row address command information and the predetermined row address selection before and after phase inversion, respectively, the row selection detection subcircuit determines that the predetermined row address command information and the predetermined row address selection information match based on that both the third judgment result and the fourth judgment result are matches; and determines that the predetermined row address command information and the predetermined row address selection information do not match based on that at least one of the third judgment result and the fourth judgment result is a mismatch.

[0149] When the predetermined row address command information and the predetermined row address selection information match, a third matching result is output to the image processing circuit; the third matching result is used to indicate that the row address of the pixel selected by the row driving circuit according to the predetermined row address command information in the pixel array is the correct row address.

[0150] When the predetermined row address command information and the predetermined row address selection information do not match, a fourth matching result is output to the image processing circuit; the fourth matching result is used to characterize that the row address of the pixel selected by the row driving circuit according to the predetermined row address command information in the pixel array is an incorrect row address, and there is an address selection failure in the row driving circuit.

[0151] When the row selection detection subcircuit is working, two comparisons are performed, comparing the command information and selection information of the predetermined row address in the original phase and after the inversion. If the row address command information does not match the row address selection information, the row address selection function of the row driving circuit is faulty, and this result is fed back to the corresponding processing circuit, ending the row address selection function fault detection process.

[0152] Exemplarily, an inverter may be used to invert the phases of the predetermined row address command information and the predetermined row address selection information.

[0153] The predetermined row address command information before and after the phase inversion may have a phase difference of 180 degrees. The predetermined row address selection information before and after the phase inversion may have a phase difference of 180 degrees.

[0154] In this way, when the row selection detection sub-circuit is working, the command information and selection information of the predetermined row address before and after inversion are compared respectively. Through two comparisons, it is ensured that the detection accuracy of the row selection detection sub-circuit on the addressing function of the row driving circuit is improved, and the false judgment of the row selection detection sub-circuit on the addressing function of the row driving circuit is reduced.

[0155] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A detection circuit, characterized in that: include: A pulse detection subcircuit, used for obtaining a pulse command signal from an image signal processing circuit, wherein the pulse command signal is used for controlling a row driving circuit to output a pixel control signal; The pulse detection subcircuit is further used to obtain a first control signal, where the first control signal is used to represent the pixel control signal output by the row driving circuit to the pixel array, and the pixel control signal is used to control the target pixel in the pixel array to be enabled; The pulse detection subcircuit is further configured to generate a detection pulse signal according to the pulse command signal and the first control signal, and determine whether the pulse command signal matches the detection pulse signal.

2. The detection circuit according to claim 1, characterized in that: The waveform of the pulse command signal has a first voltage edge and a second voltage edge, and the waveform of the first control signal has a third voltage edge and a fourth voltage edge; The waveform of the detection pulse signal has a fifth voltage edge, and the fifth voltage edge is generated according to one of the first voltage edge and the third voltage edge.

3. The detection circuit according to claim 2, characterized in that: The slope of the third voltage edge is greater than the slope of the fourth voltage edge, and the fifth voltage edge is generated according to the third voltage edge.

4. The detection circuit according to claim 2 or 3, characterized in that: The waveform of the detection pulse signal further has a sixth voltage edge, and the sixth voltage edge is generated according to one of the second voltage edge and the fourth voltage edge; and the voltage edges according to which the fifth voltage edge and the sixth voltage edge are generated belong to different signals.

5. The detection circuit according to claim 4, characterized in that: The slope of the third voltage edge is greater than the slope of the fourth voltage edge, and the sixth voltage edge is generated according to the second voltage edge.

6. The detection circuit according to claim 4 or 5, characterized in that: The determining whether the detection pulse signal matches the pulse command signal comprises: It is determined whether the time difference between the first voltage edge of the pulse command signal and the fifth voltage edge of the detection pulse signal is within a first preset range to obtain a first determination result.

7. The detection circuit according to claim 6, characterized in that: The determining whether the detection pulse signal matches the pulse command signal further includes: Determine whether the time difference between the second voltage edge of the pulse command signal and the sixth voltage edge of the detection pulse signal is within the first preset range, and obtain a second determination result; Based on the first judgment result and the second judgment result being both matched, determining that the detection pulse signal matches the pulse command signal; Based on at least one of the first judgment result and the second judgment result being mismatched, it is determined that the detection pulse signal does not match the pulse command signal.

8. The detection circuit according to claim 7, characterized in that: When the detection pulse signal matches the pulse command signal, a first matching result is output to the image processing circuit; the first matching result is used to indicate that the pixel control signal output by the row driving circuit is a correct pixel control signal; When the detection pulse signal does not match the pulse command signal, outputting a second matching result to the image processing circuit; The second matching result is used to indicate that the pixel control signal output by the row driving circuit is an erroneous pixel control signal.

9. The detection circuit according to any one of claims 1 to 8, characterized in that: The pulse detection subcircuit comprises: a trigger, wherein a first input terminal of the trigger is electrically connected to the image signal processing circuit, and a second input terminal of the trigger is used to receive the first control signal; The trigger is used to output the detection pulse signal according to the pulse command signal output by the image processing circuit and the received first control signal.

10. The detection circuit according to claim 9, characterized in that: The pulse detection subcircuit also includes: a logic gate circuit, wherein a first input terminal of the logic gate circuit is electrically connected to an output terminal of the trigger, and a second input terminal of the logic gate circuit is electrically connected to the image signal processing circuit; The logic gate circuit is used to determine whether the pulse command signal and the detection pulse signal match based on the pulse command signal output by the image processing circuit and the detection pulse signal output by the trigger.

11. The detection circuit according to claim 10, characterized in that: The pulse detection subcircuit also includes: a buffer, wherein an input end of the buffer is electrically connected to an output end of the logic gate circuit, and an output end of the buffer is electrically connected to an input end of the image signal processing circuit; The buffer is used to receive a judgment result of whether the pulse command signal and the detection pulse signal match, and output the judgment result to the image signal processing circuit.

12. The detection circuit according to claim 11, characterized in that: The pixel control signal includes a plurality of sub-control signals; The pulse detection subcircuit comprises a plurality of pulse detection units, each of which comprises the trigger, the logic gate circuit and the buffer electrically connected in sequence; The triggers of the plurality of pulse detection units are respectively used for receiving the plurality of sub-control signals of the pixel control signal.

13. The detection circuit according to any one of claims 1 to 12, characterized in that: The detection circuit also includes: a conversion subcircuit, the pulse detection subcircuit being connected to the conversion subcircuit; The conversion subcircuit is used to obtain the pixel control signal from the row driving circuit, and perform voltage reduction processing on the pixel control signal to obtain the first control signal, and output the first control signal to the pulse detection subcircuit; the voltage of the first control signal is lower than the voltage of the pixel control signal.

14. The detection circuit according to claim 13, characterized in that: The conversion subcircuit includes an amplifier device and a switch device; The first end of the amplifier device is connected to the ground end, the second end of the amplifier device is connected to the first end of the switch device, and the third end of the amplifier device is connected to the row driving circuit; the amplifier device is used to receive the pixel control signal and perform voltage reduction processing on the pixel control signal; The second end of the switching device is connected to the pulse detection subcircuit, and the third end of the switching device is connected to the row driving circuit; the switching device is used to output the pixel control signal after voltage reduction from the amplifier device under the control of the row selection signal output by the row driving circuit; the row selection signal is used to indicate the row address of the target pixel corresponding to the pixel control signal in the pixel array.

15. The detection circuit according to claim 14, characterized in that: The amplifying device comprises a first transistor, a first electrode of the first transistor is connected to a first terminal of the amplifying device, a second electrode of the first transistor is connected to a second terminal of the amplifying device, and a control electrode of the first transistor is connected to a third terminal of the amplifying device; The switching device includes a second transistor, a first electrode of the second transistor is connected to the first end of the switching device, a second electrode of the second transistor is connected to the second end of the switching device, and a control electrode of the second transistor is connected to the third end of the switching device.

16. The detection circuit according to claim 14 or 15, characterized in that: The pixel control signal includes a plurality of sub-control signals; The conversion subcircuit comprises a plurality of conversion units, each of which comprises the amplifier device and the switch device connected to each other; The amplifying devices of the plurality of conversion units are respectively used for receiving the plurality of sub-control signals of the pixel control signal.

17. The detection circuit according to any one of claims 13 to 16, characterized in that: The detection circuit also includes: a bias subcircuit, wherein an output terminal of the bias subcircuit is electrically connected to a second terminal of a switch device of the conversion subcircuit; The bias subcircuit is used to provide a bias current for the conversion subcircuit.

18. The detection circuit according to claim 17, characterized in that: The bias subcircuit comprises a plurality of current source devices, and an output end of each of the current source devices is electrically connected to a second end of the switch device of one of the conversion units; The current source device is used to output the bias current to the conversion unit.

19. The detection circuit according to any one of claims 1 to 12, characterized in that: The pulse detection subcircuit is connected to the row driving circuit; The pulse detection subcircuit is specifically used to obtain the pixel control signal from the row driving circuit and use the pixel control signal as the first control signal.

20. The detection circuit according to any one of claims 1 to 19, characterized in that: The detection circuit also includes: A row selection detection subcircuit, used for obtaining predetermined row address command information from the image signal processing circuit; the predetermined row address command information is used for specifying the row address of the target pixel in the pixel array; The row selection detection subcircuit is further used to obtain predetermined row address selection information from the row driving circuit; the predetermined row address selection information is used to indicate the row address of the pixel selected by the row driving circuit according to the predetermined row address command information in the pixel array; The row selection detection subcircuit is further used to determine whether the predetermined row address command information matches the predetermined row address selection information.

21. The detection circuit according to claim 20, characterized in that: The determining whether the predetermined row address command information matches the predetermined row address selection information includes: It is determined whether the row address of the target pixel specified by the predetermined row address command information in the pixel array and the row address of the pixel corresponding to the predetermined row address selection information in the pixel array are the same row address to obtain a third determination result.

22. The detection circuit according to claim 21, characterized in that: The determining whether the predetermined row address command information matches the predetermined row address selection information further includes: inverting the phases of the predetermined row address command information and the predetermined row address selection information; determining whether the predetermined row address command information and the predetermined row address selection information after phase inversion are the same row address, to obtain a fourth determination result; Based on the third judgment result and the fourth judgment result both matching, determining that the predetermined row address command information matches the predetermined row address selection information; Based on at least one of the third judgment result and the fourth judgment result not matching, it is determined that the predetermined row address command information and the predetermined row address selection information do not match.

23. The detection circuit according to claim 22, characterized in that: When the predetermined row address command information and the predetermined row address selection information match, outputting a third matching result to the image processing circuit; the third matching result is used to indicate that the row address of the pixel selected by the row driving circuit according to the predetermined row address command information in the pixel array is a correct row address; outputting a fourth matching result to the image processing circuit when the predetermined row address command information and the predetermined row address selection information do not match; The fourth matching result is used to indicate that the row address of the pixel selected by the row driving circuit according to the predetermined row address command information in the pixel array is an erroneous row address.

24. A driving circuit for an image sensor, characterized in that: include: An image signal processing circuit, used for outputting a pulse command signal; a row driving circuit, electrically connected to the image signal processing circuit, for acquiring the pulse command signal output by the image signal processing circuit, and outputting a pixel control signal to the pixel array according to the pulse command signal, wherein the pixel control signal is used to control the target pixel in the pixel array to be enabled; A detection circuit is electrically connected to the image signal processing circuit, and is used to obtain the pulse command signal output by the image signal processing circuit, and obtain a first control signal used to characterize the pixel control signal, generate a detection pulse signal according to the pulse command signal and the first control signal, and determine whether the detection pulse signal matches the pulse command signal.

25. The driving circuit of the image sensor according to claim 24, characterized in that: The image signal processing circuit is further used to output predetermined row address command information; the predetermined row address command information is used to specify the row address of the target pixel in the pixel array; The row driving circuit is further configured to receive the predetermined row address command, select pixels in the pixel array according to the predetermined row address command information, and output predetermined row address selection information including the row address of the selected pixel; The detection circuit is further used to obtain the predetermined row address command information and the predetermined row address selection information, and determine whether the predetermined row address command information and the predetermined row address selection information match.

26. An image sensor, characterized in that: include: Pixel array; and, The driving circuit of the image sensor as claimed in claim 24 or 25, wherein a row driving circuit in the driving circuit is electrically connected to the pixel array.

27. The image sensor according to claim 26, characterized in that The image sensor further comprises: a first substrate; a second substrate, stacked with the first substrate; The pixel array is disposed in a central area of ​​the first substrate and is located directly above the second substrate; The driving circuit of the image sensor is arranged on the second substrate.

28. An electronic device, characterized in that: include: Circuit boards; and, The image sensor as claimed in claim 26 or 27; The circuit board is electrically connected to the image sensor.

Images