Uncooled infrared detector reading circuit, infrared detector and control method thereof

Abstract

The invention provides an uncooled infrared detector reading circuit, an infrared detector and a control method of the infrared detector. The control method is applied to the uncooled infrared detector, the uncooled infrared detector comprises an uncooled infrared focal plane array with multiple rows and columns of infrared sensitive pixels, and the control method comprises the following steps: controlling the uncooled infrared detector to execute a first working state; in the first working state, part of the infrared sensitive pixels are gated so that signals can be read out; controlling the non-refrigeration infrared detector to be switched to a second working state; in the second working state, at least part of the infrared sensitive pixels are gated so that signals can be read out; wherein the number of the infrared sensitive pixels gated in the second working state is greater than the number of the infrared sensitive pixels gated in the first working state.

Description

Technical Field

[0001] The present application relates to the field of infrared imaging technology, and in particular to an uncooled infrared detector readout circuit, an infrared detector and a control method thereof. Background Art

[0002] The thermosensitive material inside the uncooled infrared detector can absorb the radiation energy of the target object and convert it into thermal energy. The thermal energy changes the physical properties of the sensitive material. The target object can be detected by converting the change in physical properties into electrical signals.

[0003] With the development trend of infrared focal plane arrays to larger arrays, smaller pixels, and faster speeds, power consumption is also increasing while performance is improving. When reading out a large array of pixel arrays, if all pixels are selected and read out in each detection, a large power consumption is required. Summary of the invention

[0004] A first aspect of an embodiment of the present application provides a control method for an uncooled infrared detector, which is applied to an uncooled infrared detector, wherein the uncooled infrared detector includes an uncooled infrared focal plane array having multiple rows and columns of infrared sensitive pixels, and the control method includes:

[0005] Controlling the uncooled infrared detector to execute a first working state; in the first working state, part of the infrared sensitive pixels are selected to read out signals;

[0006] Control the uncooled infrared detector to switch to a second working state; in the second working state, at least part of the infrared sensitive pixels are selected to read out signals; wherein the number of infrared sensitive pixels selected in the second working state is greater than the number of infrared sensitive pixels selected in the first working state.

[0007] In some embodiments, the method further comprises:

[0008] The uncooled infrared detector is controlled to switch from the first working state to the third working state, wherein the number of infrared sensitive pixels selected in the third working state is less than or equal to the number of infrared sensitive pixels selected in the first working state.

[0009] In some embodiments, the method further comprises:

[0010] The uncooled infrared detector is controlled to switch from the third working state to the second working state.

[0011] In some embodiments, when the image generated by the imaging signal detected in the third working state has a first suspected target, the uncooled infrared detector is controlled to switch to the second working state; and / or,

[0012] When a first suspected target temperature range is detected in an image generated by an imaging signal detected in the third working state, controlling the uncooled infrared detector to switch to the second working state; or,

[0013] When a control instruction for controlling the uncooled infrared detector to execute the second working state is detected in the third working state, the uncooled infrared detector is controlled to execute the second working state.

[0014] In some embodiments, when the target object is not detected within a preset time range in the first working state, the uncooled infrared detector is controlled to switch from the first working state to the third working state; or,

[0015] When it is detected in the first working state that the uncooled infrared detector is in a low power mode where it cannot detect normally, the uncooled infrared detector is controlled to execute a third working state; or,

[0016] When a control instruction for controlling the uncooled infrared detector to execute the third working state is detected in the first working state, the uncooled infrared detector is controlled to execute the third working state.

[0017] In some embodiments, when the image generated by the imaging signal detected in the first working state has a second suspected target, the uncooled infrared detector is controlled to switch to the second working state; and / or,

[0018] When a second suspected target temperature range is detected in an image generated by an imaging signal detected in the first working state, controlling the uncooled infrared detector to switch to a second working state; or,

[0019] When a control instruction for controlling the uncooled infrared detector to execute the second working state is detected in the first working state, the uncooled infrared detector is controlled to execute the second working state.

[0020] In some embodiments, when the image generated by the imaging signal detected in the first working state has a second suspected target or detects a second suspected target temperature range, before the uncooled infrared detector switches to the second working state, the method further includes:

[0021] The reminder is provided through at least one of a reminder audio and a reminder light.

[0022] In some embodiments, for a third working state, when an image generated by an imaging signal detected in the third working state has a first suspected target or a first suspected target temperature range is detected, before the uncooled infrared detector switches from the third working state to the second working state, the method further includes:

[0023] The reminder is provided through at least one of a reminder audio and a reminder light.

[0024] In some embodiments, after the uncooled infrared detector is turned on, the uncooled infrared detector is controlled to execute a first working state; or, after the uncooled infrared detector is turned on, the uncooled infrared detector is controlled to execute the first working state by inputting a control instruction.

[0025] In some embodiments, whether the pixel selection signal of each infrared sensitive pixel is disabled is controlled to control whether each infrared sensitive pixel is selected.

[0026] In some embodiments, the working state of the uncooled infrared detector is controlled by a logic control signal, and the logic control signal includes any window opening control signal and an enable signal; wherein, in the first working state and the second working state, the infrared sensitive pixel controlled by the enable signal can be selected;

[0027] In the third working state, none of the infrared sensitive picture elements controlled by the enable signal can be enabled.

[0028] In some embodiments, the method further comprises:

[0029] The infrared sensitive picture elements which are not selected are controlled to be disconnected from the power supply circuit.

[0030] The present application further provides an uncooled infrared detector readout circuit, the uncooled infrared detector readout circuit comprising:

[0031] An uncooled infrared focal plane array including multiple rows and columns of infrared sensitive pixels;

[0032] A pixel gating module is connected to each infrared sensitive pixel;

[0033] A logic control module, connected to the pixel selection module and at least part of the infrared sensitive pixels through a logic gate circuit, capable of controlling the uncooled infrared detector readout circuit to switch from a first working state to a second working state; wherein the number of infrared sensitive pixels selected in the second working state is greater than the number of infrared sensitive pixels selected in the first working state;

[0034] The readout circuit module is connected to each infrared sensitive pixel and can read out the signal of the selected infrared sensitive pixel.

[0035] In some embodiments, the logic control module can control the uncooled infrared detector readout circuit to switch from a first working state to a third working state, wherein the number of infrared sensitive pixels selected in the third working state is less than or equal to the number of infrared sensitive pixels selected in the first working state.

[0036] In some embodiments, the logic control module can also control the uncooled infrared detector readout circuit to switch from the third working state to the second working state.

[0037] In some embodiments, the logic control module can send a corresponding logic control signal to each connected infrared sensitive pixel, and the pixel selection module can send a pixel selection signal to each infrared sensitive pixel. The logic control signal controls whether the corresponding infrared sensitive pixel is selected by controlling whether the pixel selection signal of the corresponding infrared sensitive pixel is invalid.

[0038] In some embodiments, the logic control module includes any window opening module and an enabling module;

[0039] The enabling module is connected to some infrared sensitive pixels; the enabling module can send an enabling signal to the connected infrared sensitive pixels;

[0040] The arbitrary window opening module is connected to at least part of the infrared sensitive pixels, and can send an arbitrary window opening signal with gating start and end information to the infrared sensitive pixels connected to the arbitrary window opening module;

[0041] Among them, some infrared sensitive pixels are connected to both the enabling module and the arbitrary windowing module as first preset infrared sensitive pixels; the pixel selection module, the enabling module and the arbitrary windowing module are connected to the corresponding first preset infrared sensitive pixels through a preset logic gate circuit; and in the second working state, at least some of the first preset infrared sensitive pixels connected to both the enabling module and the arbitrary windowing module are selected; and when there is a third working state, in the third working state, none of the infrared sensitive pixels connected to the enabling module are selected.

[0042] In some embodiments, the logic gate circuit is an AND gate circuit, or the logic gate circuit is a NOR gate circuit.

[0043] In some embodiments, the pixel gating module includes a row gating module and a column gating module, and the logic gate circuit includes a two-level logic gate circuit of a first-level logic gate circuit and a second-level logic gate circuit; wherein,

[0044] The logic gate circuit includes two first-level logic gate circuits and one second-level logic gate circuit; the second-level logic gate circuit is a two-input logic gate circuit, the output ends of the two first-level logic gate circuits are respectively connected to the two input ends of the second-level logic gate circuit, wherein the input end of one of the first-level logic gate circuits is respectively connected to the arbitrary windowing module, at least one of the enabling modules, and the row selection module, and the input end of the other first-level logic gate circuit is respectively connected to the arbitrary windowing module, at least one of the enabling modules, and the column selection module; or,

[0045] The logic gate circuit includes a first-level logic gate circuit and a second-level logic gate circuit, the first-level logic gate circuit is a three-input logic gate circuit; the three input ends of the first-level logic gate circuit are respectively connected to one of the row selection module and the column selection module, as well as the arbitrary windowing module and the enabling module, and the output end of the first-level logic gate circuit and the other one of the row selection module and the column selection module are respectively connected to different input ends of the second-level logic gate circuit.

[0046] In some embodiments, the ratio of the number of infrared sensitive pixels connected to the enabling module to the number of all infrared sensitive pixels included in the uncooled infrared focal plane array is greater than or equal to 0.8.

[0047] In some embodiments, the uncooled infrared detector readout circuit further includes:

[0048] A power supply circuit, used for providing power to each of the infrared sensitive pixels;

[0049] The logic control module is configured to control the infrared sensitive picture elements that are not selected to be disconnected from the power circuit.

[0050] The present application further provides an infrared detector, wherein the uncooled infrared detector comprises the uncooled infrared detector readout circuit as described in any one of the above items.

[0051] The main technical effects achieved by the embodiments of the present application are:

[0052] The uncooled infrared detector readout circuit and its control method, and the infrared detector provided in the embodiments of the present application can control the uncooled infrared detector readout circuit to switch from a relatively small number of infrared sensitive pixels to a relatively large number of infrared sensitive pixels, which is beneficial for the uncooled infrared detector readout circuit to flexibly adjust the adaptive infrared sensitive pixel selection range according to specific application conditions, and is beneficial to reducing the power consumption of the uncooled infrared detector readout circuit when some infrared sensitive pixels are selected.

[0053] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0055] Figure 1 A schematic diagram of the structure of an uncooled infrared detector readout circuit provided in one embodiment of the present application;

[0056] Figure 2 A connection diagram of a first-level logic gate circuit provided in one embodiment of the present application;

[0057] Figure 3 A schematic diagram of a first preset infrared sensitive pixel and its circuit connection provided in an embodiment of the present application;

[0058] Figure 4 A row window opening module of an arbitrary window opening module provided in an embodiment of the present application;

[0059] Figure 5 An internal timing diagram of an uncooled infrared detector readout circuit provided in one embodiment of the present application;

[0060] Figure 6 A schematic diagram of the structure of another uncooled infrared detector readout circuit provided in one embodiment of the present application;

[0061] Figure 7 A schematic diagram of an infrared sensitive pixel and its circuit connection provided in one embodiment of the present application;

[0062] Figure 8 A structural schematic diagram of another uncooled infrared detector readout circuit provided in an embodiment of the present application;

[0063] Fig. 9 A schematic diagram of an infrared sensitive pixel and its circuit connection provided in one embodiment of the present application;

[0064] Fig.10 A schematic diagram of the structure of another uncooled infrared detector readout circuit provided in one embodiment of the present application;

[0065] Fig.11 A schematic diagram of an infrared sensitive pixel and its circuit connection provided in one embodiment of the present application;

[0066] Fig.12 A flow chart of a control method for an uncooled infrared detector readout circuit provided in one embodiment of the present application;

[0067] Fig.13 A flow chart of another control method for an uncooled infrared detector provided in an embodiment of the present application. DETAILED DESCRIPTION

[0068] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0069] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture; if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0070] The present application provides an uncooled infrared detector readout circuit, an infrared detector and a control method thereof. The control method is applied to an uncooled infrared detector, the uncooled infrared detector includes an uncooled infrared focal plane array having multiple rows and columns of infrared sensitive pixels, and the control method includes: controlling the uncooled infrared detector to perform a first working state; in the first working state, part of the infrared sensitive pixels are selected to be read out signals; controlling the uncooled infrared detector to switch to a second working state; in the second working state, at least part of the infrared sensitive pixels are selected to be read out signals; wherein the number of infrared sensitive pixels selected in the second working state is greater than the number of infrared sensitive pixels selected in the first working state. The above control method controls the uncooled infrared detector to switch from a relatively small number of infrared sensitive pixels selected to a relatively large number of infrared sensitive pixels selected, which is conducive to the uncooled infrared detector to flexibly adjust the adaptive infrared sensitive pixel selection range according to the specific application situation, and when part of the infrared sensitive pixels are selected, it is conducive to reducing the power consumption of the uncooled infrared detector.

[0071] The following is combined with Figures 1 to 13 , the uncooled infrared detector readout circuit, infrared detector and control method thereof of the embodiment of the present application are described in detail. In the absence of conflict, the features of the following embodiments and implementations can complement or combine with each other.

[0072] Please refer to Figure 1 , and when necessary, combine Figures 2 to 11As shown, the uncooled infrared detector readout circuit 100 provided in the embodiment of the present application includes an uncooled infrared focal plane array 10, a pixel gating module 20, a logic control module 102 and a readout circuit module 40.

[0073] The uncooled infrared focal plane array 10 includes a plurality of rows and columns of infrared sensitive pixels 101. For ease of description, the uncooled infrared focal plane array 10 includes M rows and N columns for description below, wherein M and N are both positive integers.

[0074] The pixel gating module 20 is connected to each infrared sensitive pixel 101. The pixel gating module 20 may include a row gating module 21 and a column gating module 22.

[0075] The logic control module 102 and the pixel selection module 20 are connected to at least part of the infrared sensitive pixels 101 through a logic gate circuit, and can control the uncooled infrared detector readout circuit 100 to switch from a first working state to a second working state; wherein the number of infrared sensitive pixels 101 selected in the second working state is greater than the number of infrared sensitive pixels 101 selected in the first working state.

[0076] The readout circuit module 40 is connected to each infrared sensitive pixel 101 and can read out the signal of the selected infrared sensitive pixel 101 .

[0077] In some embodiments, the first working state is the working state directly performed after the readout circuit is turned on, that is, the first working state is the initial working state. The working state can be pre-set according to specific needs, and can be the setting when the relevant product leaves the factory, or it can be the setting performed in the applicable stage. When the corresponding product is working, the first working state can remain unchanged each time, or it can be set when necessary to select the first working state of infrared sensitive pixels 101 of different numbers or regions. Of course, in some other embodiments, the first working state can also be the working state of a working stage during the working process. The detector with the readout circuit 100 can detect the area corresponding to the infrared sensitive pixel 101 that is selected. In the first working state, the detector with the readout circuit 100 can effectively detect the area corresponding to the part of the infrared sensitive pixel 101 that is selected. This area is a partial area of ​​the area that can be detected by the entire readout circuit. When the detector having the readout circuit 100 is operating in the first working state and the detected object cannot be identified or needs to be identified more clearly, the first working state can be switched to the second working state to increase the infrared sensitive pixels that are selected and increase the effective detection area of ​​the infrared sensitive pixels to increase the detection area of ​​the detector having the readout circuit 100, so as to identify the object to be detected or identify the object to be detected more clearly.

[0078] In some embodiments, the logic control module 102 can control the uncooled infrared detector readout circuit 100 to switch from the first working state to the third working state, wherein the number of infrared sensitive pixels 101 selected in the third working state is less than or equal to the number of infrared sensitive pixels 101 selected in the first working state.

[0079] It should be noted that the third working state may include a standby state, or other states that require fewer infrared sensitive pixels to be enabled compared to the first working state.

[0080] In some embodiments, the logic control module 102 can also control the uncooled infrared detector readout circuit 100 to switch from the third working state to the second working state.

[0081] In some embodiments, the logic control module 102 can send a corresponding logic control signal to each connected infrared sensitive pixel 101, and the pixel selection module 20 can send a pixel selection signal to each infrared sensitive pixel 101. The logic control signal controls whether the corresponding infrared sensitive pixel 101 is selected by controlling whether the pixel selection signal of the corresponding infrared sensitive pixel 101 is invalid.

[0082] Combination Figures 2 to 5 As shown, in some embodiments, the uncooled infrared detector readout circuit 100 may further include a digital control module 30 .

[0083] The digital control module 30 can be responsible for coordinating and managing the operation of the uncooled infrared detector readout circuit 100, such as obtaining the readout signal through the readout circuit module 40, performing signal processing, providing an interface for communicating with external devices, supporting data transmission with internal modules or external devices, and being able to receive signals from the outside (such as signals transmitted by a computer, input by interactive keys set by the uncooled infrared detector readout circuit 100 detector, etc.), and controlling the operation of the pixel gating module 20, the logic control module 102, etc. When the digital control module 30 controls the operation of the gating module 20, the logic control module 102, etc., it can send corresponding control signals to the corresponding modules as needed, and the corresponding modules then control the gating operation of the corresponding pixels.

[0084] In some embodiments, when the first working state is an initial working state, the digital control module 30 may pre-store a first logic control signal for controlling the uncooled infrared detector readout circuit 100 to execute the first working state.

[0085] The digital control module 30 may be configured to directly enter the first working state when the uncooled infrared detector readout circuit 100 is turned on.

[0086] Accordingly, the uncooled infrared detector readout circuit 100 can start working when receiving a start instruction. The digital control module 30 can be configured to receive a start instruction to start the uncooled infrared detector readout circuit 100, trigger the first logic control signal when receiving the start instruction, and send the first logic control signal to the logic control module 102. Thus, the logic control module 102 controls the uncooled infrared detector readout circuit to execute the first working state according to the first logic control signal.

[0087] In other embodiments, if the digital control module 30 does not pre-store the first logic control signal, after the uncooled infrared detector is turned on, the uncooled infrared detector readout circuit is controlled to execute the first working state by inputting a control instruction.

[0088] The digital control module 30 may be configured to receive a control instruction for controlling the uncooled infrared detector readout circuit to execute the first working state, and perform control work according to the received control instruction. The control instruction may include a first reset instruction and a gating start and stop instruction corresponding to the first working state (i.e., a gating start and stop signal corresponding to the first working state). The digital control module 30 may perform the following operations:

[0089] Receive a first reset instruction; the first reset instruction is used to indicate that the digital control module 30 can be input with a gating start and stop instruction corresponding to the first working state;

[0090] Receiving a gating start and stop instruction corresponding to the first working state;

[0091] A first logic control signal is generated according to the row strobe start and stop instructions corresponding to the first working state, and the first logic control signal is provided to the logic control module 102 .

[0092] The first reset instruction may include a reset signal capable of inputting a strobe start and end instruction corresponding to the first working state. The row strobe start and end instruction includes a row strobe start address and end address, and a column strobe start address and end address of the infrared sensitive pixel to be strobed in the first working state.

[0093] The first reset instruction may be directly input by an operator of the detector having the readout circuit 100 according to specific needs.

[0094] It should be noted that if the first working state is not the initial working state, or if the first working state needs to be entered at any time, the input control instruction can also be used to control the uncooled infrared detector circuit to execute the first working state.

[0095] It should be noted that, in some embodiments, the readout circuit 100 can be configured to directly execute the first working state only when it is turned on, which is conducive to the detector with the readout circuit 100 to quickly enter the working state. In other embodiments, the readout circuit can be configured to directly execute the first working state when it is turned on, and can also execute the first working state by inputting a control instruction, so that the detector with the readout circuit 100 can meet more requirements and be more flexible in application. Of course, the readout circuit executes the first working state by inputting a control instruction.

[0096] In some embodiments, when executing the second working state, the non-cooled infrared detector readout circuit can be controlled to execute the second working state by inputting a control instruction. The digital control module 30 can be configured to receive a control instruction for controlling the non-cooled infrared detector readout circuit to execute the second working state, and perform control work according to the received control instruction. The control instruction may include a second reset instruction and a gating start and stop instruction corresponding to the second working state (i.e., a gating start and stop signal corresponding to the second working state). The digital control module 30 can be configured to execute the following operations:

[0097] Receive a second reset instruction; the second reset instruction is used to indicate that the digital control module 30 can be input with a strobe start and stop instruction corresponding to the second working state;

[0098] Receiving a gating start and stop instruction corresponding to the second working state;

[0099] A second logic control signal is generated according to the gating start and stop instruction corresponding to the second working state, and the second logic control signal is provided to the logic control module 102 .

[0100] The second reset instruction may include a reset signal capable of inputting a strobe start and end instruction corresponding to the second working state. The row strobe start and end instruction may include a row strobe start address and end address, and a column strobe start address and end address of the infrared sensitive pixel to be strobed in the second working state.

[0101] The second reset instruction may be directly input by an operator of the detector having the readout circuit 100 according to specific needs, or may be input by the operator after the readout circuit 100 reminds the operator when determining that the second working state needs to be switched.

[0102] It should be noted that switching from the first working state to the second working state can be carried out when it is necessary to identify the detection target or to identify the detection target more clearly, such as when there is a second suspected target in the image generated by the imaging signal detected in the first working state, or when the second suspected target temperature range is detected in the image generated by the imaging signal detected in the first working state, or when the operator directly inputs a control instruction in the first working state as needed.

[0103] Switching from the third working state to the second working state may be performed when it is necessary to identify the detection target or to identify the detection target more clearly, such as when there is a first suspected target in the image generated by the imaging signal detected in the third working state, or when a first suspected target temperature range is detected in the image generated by the imaging signal detected in the third working state, or when the operator directly inputs a control instruction in the third working state as needed.

[0104] The first suspected target and the second suspected target can be set according to the corresponding working state, and they can be the same or different. The first suspected target temperature range and the second suspected target temperature range can be set according to the corresponding working state, and they can be the same or different.

[0105] In some embodiments, when executing the third working state, it can be implemented by inputting a control instruction, or the uncooled infrared detector readout circuit generates a corresponding third logic control signal according to the readout signal obtained in the first working state.

[0106] For the method of inputting a control instruction, in some embodiments, the control instruction may directly include a third logic control signal. The digital control module 30 may be configured to receive a third logic control signal for controlling the uncooled infrared detector readout circuit to execute a third working state, and control the uncooled infrared detector circuit to execute the third working state according to the third logic control signal.

[0107] For the non-cooled infrared detector readout circuit to generate a corresponding third logic control signal, the digital control module 30 can generate a third logic control signal according to the specific situation of the non-cooled infrared detector readout circuit in the first working state. For example, in the first working state, when the target object is not detected within a preset time range or when it is detected that the non-cooled infrared detector is in a low-power mode that cannot be detected normally, the digital control module 30 can generate a third logic control signal. The preset time range can be set according to the specific situation, such as 3 minutes, 5 minutes, etc. The low-power mode can be determined according to the preset electrical signal range in which the readout signal does not work normally in the first working state. The preset electrical signal range may include at least one of a current range and a voltage range.

[0108] It should be noted that, in some embodiments, the readout circuit 100 can be configured to generate a corresponding third logic control signal according to the readout signal obtained in the first working state to control the execution of the third working state, and can also control the execution of the third working state by inputting a control instruction as required by the operator, so that the detector with the readout circuit 100 can meet more requirements and be more flexible in application. Of course, in other embodiments, the readout circuit 100 can be configured to generate a corresponding third logic control signal according to the readout signal obtained in the first working state to control the execution of the third working state.

[0109] In some embodiments, the logic control module 102 includes an arbitrary windowing module 90 and an enabling module 70. Accordingly, the logic control signal includes an enabling signal and an arbitrary windowing signal. The logic control signal in each working state has a corresponding enabling signal and an arbitrary windowing signal. The enabling module 70 can be integrated into the digital control module 30 or can be arranged outside the digital control module 30.

[0110] The digital control module 30 can be configured to provide an enable signal en to the enable module 70, provide any windowing signals ROW_SEL and COL_SEL to any windowing module 90, and provide a pixel gating signal to the pixel gating module 20. The pixel gating signal includes a row gating signal row provided to the row gating module 21, and a column gating signal col provided to the column gating module 22.

[0111] The enabling module 70 is connected to some infrared sensitive pixels 101. The enabling module 70 can send an enabling signal to the connected infrared sensitive pixels 101.

[0112] The arbitrary window opening module 90 is connected to at least part of the infrared sensitive pixels 101 , and can send an arbitrary window opening signal with gating start and end information to the infrared sensitive pixels 101 connected to the arbitrary window opening module 90 .

[0113] Accordingly, when the readout circuit executes the second working state, after the digital control module 30 receives the strobe start and stop instructions corresponding to the second working state, a second logic control signal including an arbitrary windowing signal can be generated according to the row strobe start and stop instructions. The strobe start and stop instructions can be used to generate an arbitrary windowing signal corresponding to the second working state.

[0114] Generating the second logic control signal according to the row strobe start and stop instruction may include generating any windowing signal and enable signal corresponding to the second working state.

[0115] The enable signal can be received by the control module 30 through external input, and then used as part of the second logic control signal. The enable signal can be input synchronously or successively with the row selection start and stop instructions. The enable signal can also be pre-stored in the digital control module 30 itself, and accordingly, the digital control module 30 triggers the corresponding enable signal according to the working state to be executed, or the working state to be executed by the digital control module 30 generates the corresponding enable signal.

[0116] When the digital control module 30 receives the strobe start and stop instructions corresponding to the first working state, it can generate a first logic control signal including any windowing signal according to the row strobe start and stop instructions corresponding to the first working state. The generation of the first logic control signal is similar to the second logic control signal.

[0117] In some embodiments, the uncooled infrared detector readout circuit 100 can be configured so that in the first working state and the second working state, all the infrared sensitive pixels connected to the enable module can be enabled. In the third working state, none of the infrared sensitive pixels connected to the enable module can be enabled. That is, in the first working state and the second working state, the specific gating of the infrared sensitive pixels mainly depends on any window opening signal. In the third working state, the specific gating of the infrared sensitive pixels mainly depends on the enable signal. In some embodiments, when the enable signal is set to a high level, all the infrared sensitive pixels connected to the enable module can be enabled, and when the enable signal is set to a low level, none of the infrared sensitive pixels connected to the enable module can be enabled.

[0118] When the readout circuit executes the third working state, the control instruction input can be realized by an operator of the detector having the readout circuit 100 directly inputting an external enable signal for control according to specific needs.

[0119] When the readout circuit executes the third working state, the uncooled infrared detector readout circuit generates a corresponding third logic control signal according to the readout signal obtained in the first working state. When the readout circuit 100 determines that it is necessary to switch to the third working state, it directly generates a corresponding enable signal to control the working state entered by the readout circuit.

[0120] In some embodiments, part of the infrared sensitive pixels 101 can be connected to both the enabling module 70 and the arbitrary windowing module 90 as first preset infrared sensitive pixels 1011. The pixel gating module 20, the enabling module 70 and the arbitrary windowing module 90 are connected to the corresponding first preset infrared sensitive pixels 1011 through a preset logic gate circuit; and in the second working state, at least part of the first preset infrared sensitive pixels 1011 connected to both the enabling module 70 and the arbitrary windowing module 90 are gated.

[0121] It should be noted that each row of infrared sensitive pixels may correspond to a row selection signal line ROW, and the uncooled infrared detector readout circuit 100 has M row selection signal lines, namely ROW1, ROW2, ROW3, ​​... ROWm. The row selection module 21 is connected to the infrared sensitive pixels 101 corresponding to each row through the row selection signal lines.

[0122] Each column of infrared sensitive pixels may correspond to a column selection signal line COL. The uncooled infrared detector readout circuit 100 has N row selection signal lines, namely COL1, COL2, COL3, ... ROWn. The column selection module 22 is connected to the infrared sensitive pixels 101 corresponding to each column through the row selection signal lines.

[0123] The uncooled infrared detector readout circuit 100 also has an enable signal line En and a windowing signal line. The enable signal line En is connected to a preset part of the infrared sensitive pixels 101, and the windowing signal line is connected to at least a preset part of the infrared sensitive pixels 101. The enable signal line En, the windowing signal line, the row selection signal line ROW of the preset infrared sensitive pixel 101, and the column selection signal line COL of the preset infrared sensitive pixel 101 can be connected through a preset logic gate circuit 80. The enabling module 70 provides an enable signal to the corresponding infrared sensitive pixel 101 through the enable signal line En.

[0124] The infrared sensitive pixels 101 connected to the enabling module 70 and the arbitrary windowing module 90 may be the same, or may not be completely the same or completely different. For the embodiment in which the infrared sensitive pixels 101 connected to the enabling module 70 and the arbitrary windowing module 90 are not completely the same, there may be a variety of situations, such as some infrared sensitive pixels 101 are connected to both the enabling module 70 and the arbitrary windowing module 90, and some infrared sensitive pixels 101 are only connected to the arbitrary windowing module 90. For another example, some infrared sensitive pixels 101 are connected to both the enabling module 70 and the arbitrary windowing module 90, and some infrared sensitive pixels 101 are only connected to the enabling module 70.

[0125] In some embodiments, the logic gate circuit 80 includes two levels of logic gate circuits, a first level logic gate circuit and a second level logic gate circuit.

[0126] Combination Figures 1 to 9 As shown, in some embodiments, the logic gate circuit 80 includes two first-level logic gate circuits 81 and 82 and one second-level logic gate circuit 83. The second-level logic gate circuit 83 can be a two-input logic gate circuit, and the output ends of the two first-level logic gate circuits 81 and 82 are respectively connected to the two input ends of the second-level logic gate circuit 83, wherein the input end of one of the first-level logic gate circuits is respectively connected to the arbitrary windowing module 90, at least one of the enabling modules 70, and the row gating module, and the input end of the other first-level logic gate circuit is respectively connected to the arbitrary windowing module 90, at least one of the enabling modules 70, and the column gating module. The logic gate circuit 80 can be used in the case where the row selection signal and the column selection signal of the infrared sensitive pixel are both controlled by the arbitrary windowing module 90 and the enabling module 70.

[0127] Combination Figures 1 to 3 As shown, the input end of the first-level logic gate circuit 81 is respectively connected to the arbitrary windowing module 90, the enabling module 70 and the row selection module 21, and the input end of another first-level logic gate circuit 82 is respectively connected to the arbitrary windowing module 90, the enabling module 70 and the column selection module 22.

[0128] Combination Figure 1 and Figure 3As shown, the enable signal line En includes two enable signal lines 71 and 72, and the arbitrary windowing signal line includes arbitrary windowing signal lines 91 and 92. The enable signal line 71 and the arbitrary windowing signal line 91 can be connected to each row selection signal line ROW through a first-level logic gate circuit 81, respectively. The enable signal line 72 and the arbitrary windowing signal line 92 can be connected to each column selection signal line COL through a first-level logic gate circuit 82, respectively. Then, the corresponding two first-level logic gate circuits 81 and 82 are connected to the second-level logic gate circuit 83, and finally, the output terminal N1 of the second-level logic gate circuit 83 is connected to the infrared sensitive pixel 101. Figure 2 Taking the first-stage logic gate circuit 81 as an example, the three input terminals connected to En, ROW(i), and ROW-SEL correspond to the enable signal line 71, the row selection signal line ROW, and the arbitrary windowing signal line 91, respectively.

[0129] Continue to combine Figure 1 and Figure 3 As shown, the row selection signal lines ROW connecting the 3rd to (M / 2-1)th and (M / 2+2)th to (M-2)th rows of infrared sensitive pixels 101 of the uncooled infrared focal plane array 10 are respectively connected to each enable signal line 71 through a first-level logic gate circuit 81, and the column selection signal lines COL connecting the 3rd to (N / 2-1)th and (N / 2+2)th to (N-2)th columns of infrared sensitive pixels 101 of the uncooled infrared focal plane array 10 are respectively connected to the enable signal line 72 through a first-level logic gate circuit 82. Among them, the infrared sensitive pixels 101 located in the 3rd to (M / 2-1)th and (M / 2+2)th to (M-2)th rows and the 3rd to (N / 2-1)th and (N / 2+2)th to (N-2)th columns of the uncooled infrared focal plane array 10 are used as preset infrared sensitive pixels 1011. The two first-level logic gate circuits 81 and 82 corresponding to each preset infrared-sensitive pixel 1011 are connected to the corresponding second-level logic gate circuit 83 , and the output end of the corresponding second-level logic gate circuit 83 is connected to the infrared-sensitive pixel 101 .

[0130] The logic gate circuit 80 is an AND gate circuit, and logic gates 81, 82, and 83 of each level of the logic gate circuit 80 are all AND gate circuits.

[0131] Combination Figures 6 to 8As shown, in the uncooled infrared detector readout circuit 200 or uncooled infrared detector readout circuit 300 provided in some other embodiments, part of the infrared sensitive pixels 101 may also be connected only to the enable signal line 71 and any windowing signal lines 91 and 92 through the logic gate circuit, or part of the infrared sensitive pixels 101 may also be connected only to the enable signal line 72 and any windowing signal lines 91 and 92 through the logic gate circuit, or part of the infrared sensitive pixels 101 may also be connected only to the enable signal lines 71 and 72 and any windowing signal line 91 through the logic gate circuit, or part of the infrared sensitive pixels 101 may also be connected only to the enable signal lines 71 and 72 and any windowing signal line 92 through the logic gate circuit. Accordingly, the first-level logic gate circuits 81 and 82 may be connected to matching input terminals according to specific circumstances.

[0132] In other embodiments, the logic gate circuit 80 includes a first-level logic gate circuit 81 or 82 and a second-level logic gate circuit 83, wherein the first-level logic gate circuit is a three-input logic gate circuit; the three input terminals of the first-level logic gate circuit are respectively connected to one of the row selection module 21 and the column selection module 22, as well as the arbitrary windowing module 90 and the enabling module 70, and the output terminal of the first-level logic gate circuit and the other of the row selection module and the column selection module are respectively connected to different input terminals of the second-level logic gate circuit 83. The logic gate circuit 80 can be used in the case where one of the row selection signal and the column selection signal of the infrared sensitive pixel 101 is controlled by the arbitrary windowing module 90 and the enabling module 70.

[0133] by Fig.10 and Fig.11 For example, in the uncooled infrared detector readout circuit 400, the logic gate circuit 80 includes a first-level logic gate circuit 81 and a second-level logic gate circuit 83. The three input ends of the first-level logic gate circuit are respectively connected to the row selection module 21, the arbitrary windowing module 90 and the enabling module 70, and the output end of the first-level logic gate circuit 81 and the column selection module 22 are respectively connected to different input ends of the second-level logic gate circuit 83.

[0134] Of course, in some other embodiments, the enable signal line can also be connected to the corresponding row selection signal line, column selection signal line or infrared sensitive pixel through other forms of logic gate circuits. For example, the enable signal line is connected to the row selection signal line and the column selection signal line through a logic gate circuit with three input terminals and one output terminal.

[0135] It should be noted that, in some other embodiments, the logic gate circuit may also be a NOR gate circuit.

[0136] Based on the above description, combined with Figure 4 and Figure 5As shown, taking the row address of any window module 90 as the second to fourth rows as an example, the corresponding timing logic changes of the internal signal are as follows: Figure 5 As shown. When the reset signal START arrives, it indicates that the start phase sets the random window row selection signal, and the external selection start and stop instructions can be input, and the digital control module 30 receives the external selection start and stop instructions accordingly. At this time, the counter of the random window module 90 is reset and can count the rising edge of the row clock CLK, that is, when each row selection signal ROW(i) arrives, the counter is increased by 1; the three-input comparator is composed of a logic AND gate and two sub-comparators, and the input signals are the row window start and end addresses and the counter output signal, wherein the row window start and end addresses are given in advance, when the counter output result is greater than the window row end address, that is, 4, the output level of the upper sub-comparator inside the comparator is inverted to a low corresponding signal COMP1, when the counter output result is greater than or equal to the window row start address, that is, 2, the output level of the lower sub-comparator inside the comparator is inverted to a high corresponding signal COMP2, and the signal generated by COMP1 and COMP2 through the logic AND gate is used as the row window signal, that is, SEL_ROW, and the column window signal is the same.

[0137] In some embodiments, the infrared sensitive pixel 101 connected to the enabling module 70 and the arbitrary window opening module 90 is the same.

[0138] The logic control module 102 can be configured to control the infrared sensitive pixel 101 connected to the enable module 70 to be enabled when the enable signal is at a high level, and to control the infrared sensitive pixel 101 connected to the enable module 70 to not be enabled when the enable signal is at a low level.

[0139] Among them, in the first working state, the enable signal is at a high level, and the logic control module 102 is configured to be able to control the infrared sensitive pixel 101 that is not connected to the enable module 70 to be enabled, and to control the first preset infrared sensitive pixel 1011 located in the row included in the enable start and end instructions corresponding to the first working state to be enabled; or the logic control module 102 is configured to only control the infrared sensitive pixel 101 that is not connected to the enable module 70 to be enabled.

[0140] In the second working state, the enable signal is at a high level, and the logic control module 102 is configured to control the infrared sensitive pixel 101 that is not connected to the enable module 70 to be enabled, and to control the first preset infrared sensitive pixel 1011 located in the row and column included in the enable start and stop instructions corresponding to the second working state to be enabled.

[0141] For the third working state, in the third working state, the enable signal is at a low level, and the logic control module 102 is configured to control the infrared sensitive pixel 101 that is not connected to the enable module 70 to be enabled.

[0142] In some other embodiments, the infrared sensitive pixels 101 connected to the enabling module 70 and the arbitrary window opening module 90 are not completely the same, and each infrared sensitive pixel 101 is connected to the arbitrary window opening module 90.

[0143] The logic control module 102 is configured to control the infrared sensitive pixel 101 connected to the enable module 70 to be enabled when the enable signal is at a high level, and to control none of the infrared sensitive pixel 101 connected to the enable module 70 to be enabled when the enable signal is at a low level; the logic control module 102 is configured to provide a windowing control signal to any windowing module 90, and the windowing control signal includes a row enabling start address and an end address, and a column enabling start address and an end address of the infrared sensitive pixel corresponding to the working state.

[0144] Wherein, in the first working state, the enable signal is at a high level; the logic control module 102 is configured to control the first preset infrared sensitive pixel 1011 in the row and column included in the selection start and stop instructions corresponding to the first working state to be selected.

[0145] In the second working state, the enable signal is at a high level, and the logic control module 102 is configured to control the first preset infrared sensitive pixel 1011 located in the row and column included in the selection start and stop instruction corresponding to the second working state to be selected.

[0146] For the third working state, in the third working state, the enable signal is at a low level, and the logic control module 102 is configured to control at least part of the infrared sensitive picture elements 101 that are not connected to the enable module 70 to be enabled.

[0147] In some embodiments, in some embodiments, the uncooled infrared detector readout circuit 100 further includes a prompt module 50. The prompt module 50 is connected to both the readout circuit module 40 and the logic control module 102 to obtain the readout signal of the readout circuit module 40, and to generate a prompt signal Alarm when the infrared sensitive pixel in the corresponding working state cannot meet the detection requirements.

[0148] It should be noted that the detector of the readout circuit 100 may have a reminder module (not shown), which may be integrated into the digital control module 30 or connected to the digital control module 30. The reminder module may perform a reminder action under the triggering of the corresponding reminder signal, so that the operator can switch the working state of the readout circuit to a suitable working state in time. The reminder module may include an audio reminder module such as an alarm or other audio reminder, and a light reminder module such as a reminder light, and accordingly, a reminder audio, a reminder light, etc. may be issued. The setting of the reminder module can be mainly used to remind the operator when it is necessary to switch to the second working state.

[0149] The digital control module 30 is configured to transmit a corresponding prompt signal to the reminder module or generate a corresponding triggering reminder signal according to the prompt signal when receiving the prompt signal, so that the reminder module performs a reminder operation, so that the uncooled infrared detector readout circuit can be switched to a working state that meets the requirements in time, such as switching to a working state that selects more infrared sensitive pixels.

[0150] In the first working state, the prompt module 50 can be used to obtain the readout signal of the readout circuit module 40 in the first working state, that is, the imaging signal or the corresponding signal generated according to the readout signal, and when it is determined according to the imaging signal that the current first working state cannot meet the detection requirements, a first prompt signal is generated and provided to the digital control module 30. The digital control module 30 is configured to transmit the corresponding prompt signal to the reminder module or generate a trigger reminder signal according to the corresponding prompt signal when receiving the first prompt signal, so that the reminder module performs the reminder work. After receiving the reminder, the operator can input the corresponding second reset instruction to the digital control module 30, and then input the gating start and stop instructions corresponding to the second working state to the digital control module 30, and can generate a corresponding second logic control signal to control the non-cooled infrared detector readout circuit 100 to switch from the first working state to the second working state. The current first working state cannot meet the detection requirements, which may include one or more situations such as the image generated by the imaging signal obtained in the first working state has a second suspected target and the image generated by the imaging signal obtained in the first working state has a second suspected target temperature range detected.

[0151] The readout signal of the readout circuit module 40 may be a voltage signal or a current signal. The uncooled infrared detector readout circuit 100 may be preset with an electrical signal range or a digital signal range corresponding to the second suspected target or the second suspected target temperature range. Whether there is a second suspected target in the image or whether the second suspected target temperature range is detected may be determined by comparing the readout signal with the preset electrical signal range corresponding to the second suspected target or the second suspected target temperature range, or by comparing the digital signal generated according to the readout signal with the preset digital signal range.

[0152] In other embodiments, the uncooled infrared detector readout circuit 100 may generate a first prompt signal and provide the first prompt signal to the digital control module 30 when the readout signal read out by the readout circuit module 40 is not within the first preset electrical signal range. The first preset electrical signal range corresponds to a voltage signal range or a current signal range preset according to the first working state. The first preset electrical signal range can be set according to specific needs, for example, the first preset electrical signal range can be an electrical signal range under the conditions of no suspected target, no suspected target temperature and normal operation in the first working state.

[0153] In some embodiments, for a third working state, the prompt module is also used to obtain a readout signal of the readout circuit module 40 in the third working state. The uncooled infrared detector readout circuit 100 may be preset with an electrical signal range or a digital signal range corresponding to the first suspected target or the first suspected target temperature range. Accordingly, whether there is a first suspected target in the image or whether the first suspected target temperature range is detected can be determined by comparing the readout signal with the preset electrical signal range corresponding to the first suspected target or the first suspected target temperature range, or by comparing the corresponding digital signal generated by the readout signal with the preset digital signal range.

[0154] When receiving the second prompt signal, the digital control module 30 transmits a corresponding prompt signal to the reminder module or generates a trigger reminder signal according to the corresponding prompt signal, so that the reminder module performs the reminder work. After receiving the reminder, the operator can input the corresponding second input instruction to the digital control module 30, and then input the gating start and stop instructions corresponding to the second working state to the digital control module 30, and can generate a corresponding second logic control signal to control the non-cooled infrared detector readout circuit to switch from the third working state to the second working state.

[0155] In other embodiments, the uncooled infrared detector readout circuit 100 may generate a second prompt signal and provide the second prompt signal to the digital control module 30 when the readout signal read out by the readout circuit module 40 is not within the second preset electrical signal range.

[0156] Accordingly, the second preset electrical signal range corresponds to a voltage signal range or a current signal range preset according to the third working state. The second preset electrical signal range can be set according to specific needs, for example, the second preset electrical signal range can be an electrical signal range under the third working state when there is no first suspected target, no first suspected target temperature, and normal operation. The second preset electrical signal and the first preset electrical signal can be the same or different.

[0157] In some embodiments, the uncooled infrared detector readout circuit further includes a power supply circuit 60 .

[0158] The power circuit 60 is used to provide power to each of the infrared sensitive pixels 101 .

[0159] The logic control module 102 is configured to control the infrared sensitive pixel 101 that is not selected to be disconnected from the power circuit 60 .

[0160] It should be noted that the power circuit 60 may be provided with a switch module 601 at the connection of at least some of the infrared sensitive pixels 101. For example, a switch module 601 may be provided at the connection of each infrared sensitive pixel 101.

[0161] In some embodiments, each of the infrared sensitive pixels 101 is connected to the power supply circuit 60 via a switch module 601 , and the switch module 601 is connected to the logic gate circuit 80 .

[0162] Correspondingly, controlling the infrared sensitive picture element 101 that is not selected to be disconnected from the power supply circuit 60 includes controlling the switch module 601 to be disconnected.

[0163] Combination Figures 1 to 3 In some embodiments, the output terminal N1 of the second-stage logic gate circuit 83 may be connected to the switch module 601 of the power supply circuit 60 to control the switch module 601 to be disconnected.

[0164] In some embodiments, the ratio of the number of infrared sensitive pixels 101 connected to the enabling module 70 to the number of all infrared sensitive pixels 101 included in the uncooled infrared focal plane array 10 is greater than or equal to 0.8 to better control the uncooled infrared focal plane array.

[0165] Of course, in some other embodiments, the logic control module may also be other modules capable of logic control functions.

[0166] An embodiment of the present application also provides an uncooled infrared detector, which includes the uncooled infrared detector readout circuit 100, the uncooled infrared detector readout circuit 200, the uncooled infrared detector readout circuit 300 or the uncooled infrared detector readout circuit 400 described in any of the above embodiments.

[0167] like Fig.12 As shown, the present application further provides a control method for an uncooled infrared detector, which is applied to the uncooled infrared detector as described above, and the control method includes the following steps S20 and S40:

[0168] In step S20, the uncooled infrared detector is controlled to execute a first working state; in the first working state, part of the infrared sensitive pixels 101 are selected to read out signals;

[0169] In step S40, the uncooled infrared detector is controlled to switch to a second working state; in the second working state, at least part of the infrared sensitive pixels are selected to read out signals; wherein the number of infrared sensitive pixels 101 selected in the second working state is greater than the number of infrared sensitive pixels 101 selected in the first working state.

[0170] The control method of the uncooled infrared detector is described in detail below.

[0171] In step S20, after the uncooled infrared detector is turned on, the uncooled infrared detector can be controlled to directly execute the first working state, or after the uncooled infrared detector is turned on, the uncooled infrared detector can be controlled to execute the first working state by inputting a control instruction.

[0172] In some embodiments, the first working state is an initial working state.

[0173] Accordingly, in step S20, the operation may be started upon receiving the start instruction, that is, upon receiving the start instruction, the pre-stored first logic control signal is triggered to control the uncooled infrared detector to execute the first working state.

[0174] Of course, after the uncooled infrared detector is turned on, the uncooled infrared detector readout circuit may be controlled to execute the first working state by inputting a control instruction.

[0175] Accordingly, a control instruction for executing the first working state is inputted in the detector, and the detector can be controlled to execute the first working state according to the received control instruction. The control instruction may include a first reset instruction and a gating start and stop instruction corresponding to the first working state.

[0176] It should be noted that the first working state may not be the initial working state. For example, the first working state may be entered at any time. Accordingly, the input control instruction may be used to control the uncooled infrared detector circuit to execute the first working state.

[0177] It should be noted that, in some embodiments, the detector can be controlled to directly execute the first working state when it is turned on, which is conducive to the detector with the readout circuit 100 to quickly enter the working state. In other embodiments, the first working state can be directly executed when the detector is turned on, or the first working state can be executed by inputting a control instruction when it is turned on, so that the detector with the readout circuit 100 can meet more requirements and be more flexible in application. Of course, in some other embodiments, the detector can also be controlled to execute the first working state only by inputting a control instruction when it is turned on.

[0178] For other related descriptions of the first working state, reference may be made to the above-mentioned related descriptions on the readout circuit, which will not be repeated here.

[0179] In step S40, the uncooled infrared detector readout circuit is controlled to switch to the second working state, which can be switched when the first working state cannot meet the detection requirements and needs to identify the detection target or more clearly identify the detection target. Specifically, the switching can be performed based on whether the readout signal obtained in the first working state meets the detection requirements or the operator can directly switch as needed.

[0180] For switching according to whether the readout signal obtained in the first working state meets the detection requirement, step S40 may include at least one of the following steps S141 and S142:

[0181] In step S401, when the image generated by the imaging signal detected in the first working state has a second suspected target, the uncooled infrared detector is controlled to switch to the second working state.

[0182] The uncooled infrared detector may be preset with an electrical signal range or a digital signal range corresponding to the second suspected target. It may be determined whether the image generated by the imaging signal detected in the first working state has the second suspected target based on the comparison between the readout signal and the preset electrical signal range corresponding to the second suspected target, or it may be determined whether the image generated by the imaging signal detected in the first working state has the second suspected target based on the comparison between the digital signal corresponding to the readout signal and the preset digital signal range. The second suspected target may be the outline or part of the outline of the target to be detected. The second suspected target may be one or more of humans, animals, objects, etc. set as needed.

[0183] In step S402, when a second suspected target temperature range is detected in an image generated by an imaging signal detected in the first working state, the uncooled infrared detector is controlled to switch to a second working state.

[0184] The uncooled infrared detector may be preset with an electrical signal range or a digital signal range corresponding to the second suspected target temperature range. It may be determined whether the second suspected target temperature range is detected in the image generated by the imaging signal detected in the first working state by comparing the readout signal with the preset electrical signal range corresponding to the second suspected target temperature range, or it may be determined whether the second suspected target temperature range is detected in the image generated by the imaging signal detected in the first working state by comparing the digital signal corresponding to the readout signal with the preset digital signal range. The second suspected target temperature range may be the radiation temperature of the target to be detected set as needed. If the detection target includes humans, the corresponding second suspected target temperature range may include 36°C-39°C.

[0185] It should be noted that in step S401 and step S402, the uncooled infrared detector is controlled to switch to the second working state, and control of the uncooled infrared detector readout circuit to execute the second working state can be achieved by inputting a control instruction for controlling the uncooled infrared detector readout circuit to execute the second working state.

[0186] If the operator directly switches according to needs, step S40 may include the following step S403:

[0187] In step S403, when a control instruction for controlling the uncooled infrared detector to execute the second working state is detected in the first working state, the uncooled infrared detector is controlled to execute the second working state.

[0188] For example, when the operator believes based on experience that it is necessary to further confirm the target detected in the detection area, the operator can directly input a control instruction to control the uncooled infrared detector to execute the second working state.

[0189] It should be noted that the control instruction for controlling the uncooled infrared detector to execute the second working state may include a second reset instruction and a gating start and stop instruction corresponding to the second working state. Accordingly, the control of switching the uncooled infrared detector to the second working state includes the following steps:

[0190] receiving a second reset instruction; wherein the second reset instruction is used to indicate that a gating start and stop instruction corresponding to a second working state can be received as input;

[0191] Receiving a gating start and stop instruction corresponding to the second working state;

[0192] A second logic control signal is generated according to the selection start and stop instructions corresponding to the second working state.

[0193] The second reset instruction may include a reset signal capable of inputting a strobe start and end instruction corresponding to the second working state. The row strobe start and end instruction may include a row strobe start address and end address, a column strobe start address and end address of the infrared sensitive pixel to be strobed in the second working state. The end address described in this application is also the end address.

[0194] The second reset instruction can be directly input by the operator of the detector according to specific needs, or can be input by the operator after being reminded when it is determined that the second working state needs to be switched.

[0195] For other related descriptions of the second working state, reference may be made to the above-mentioned related descriptions on the readout circuit, which will not be repeated here.

[0196] When the image generated by the imaging signal detected in the first working state has a second suspected target or detects a second suspected target temperature range, before the uncooled infrared detector switches to the second working state, the method further includes:

[0197] The reminder is provided through at least one of a reminder audio and a reminder light.

[0198] The method of reminding by at least one of the reminding audio and the reminding light can remind the operator in time and switch to the second working state in time.

[0199] The reminder step can be implemented by setting a reminder module and a reminder module. For details, please refer to the relevant description of the above readout circuit, which will not be repeated here.

[0200] It should be noted that in some other implementations, in the first working state, the uncooled infrared detector can control the uncooled infrared detector readout circuit to switch to the second working state when the readout signal is not within the first preset electrical signal range. Accordingly, when the readout signal is not within the first preset electrical signal range, a reminder can be given by at least one of a reminder audio and a reminder light.

[0201] The first preset electrical signal range corresponds to a voltage signal range or a current signal range preset according to the first working state. The first preset electrical signal range can be set according to specific needs, for example, the first preset electrical signal range can be an electrical signal range under the first working state when there is no second suspected target in the imaging, the imaging does not detect the suspected second target temperature and the imaging works normally.

[0202] In some embodiments, after controlling the uncooled infrared detector readout circuit to execute the first working state, the method further includes the following steps:

[0203] The uncooled infrared detector readout circuit is controlled to switch from the first working state to the third working state, wherein the number of infrared sensitive pixels 101 selected in the third working state is less than the number of infrared sensitive pixels 101 selected in the first working state.

[0204] It should be noted that the third working state may include a standby state, or other states that require fewer infrared sensitive pixels to be enabled compared to the first working state.

[0205] The uncooled infrared detector can generate a corresponding third logic control signal according to the readout signal obtained in the first working state to switch to the third working state. It can also switch to the third working state by inputting a control instruction.

[0206] Regarding the method of inputting a control instruction, in some embodiments, the control instruction may directly include a third logic control signal, such as an enable signal. The detector may receive a third logic control signal for controlling the uncooled infrared detector to execute a third working state, and control the execution of the third working state according to the third logic control signal.

[0207] A method for generating a corresponding third logic control signal for the non-cooled infrared detector. For example, in the first working state, when the target object is not detected within a preset time range or when it is detected that the non-cooled infrared detector is in a low-power mode where it cannot detect normally, a third logic control signal can be generated. The preset time range can be set according to the specific situation, such as 3 minutes, 5 minutes, etc. The low-power mode can be determined based on the fact that the readout signal is not within a preset electrical signal range that normally operates in the first working state. The preset electrical signal range may include at least one of a current range and a voltage range.

[0208] Other descriptions of the third working state can refer to the above-mentioned description of the uncooled infrared detector readout circuit, which will not be repeated here.

[0209] In some embodiments, the method further comprises the steps of:

[0210] The uncooled infrared detector is controlled to switch from the third working state to the second working state.

[0211] In this step, the non-cooled infrared detector readout circuit is controlled to switch to the second working state, but the third working state cannot meet the detection requirements and needs to identify the detection target or more clearly identify the detection target. Specifically, the switch can be made according to whether the readout signal obtained in the third working state meets the detection requirements or the operator can directly switch according to the needs.

[0212] Correspondingly, for switching based on whether the readout signal obtained in the third working state meets the detection requirement, controlling the uncooled infrared detector to switch from the third working state to the second working state may include at least one of the following steps S404 and S405.

[0213] In step S404, when the image generated by the imaging signal detected in the third working state has a first suspected target, the uncooled infrared detector is controlled to switch to the second working state.

[0214] The uncooled infrared detector may be preset with an electrical signal range or a digital signal range corresponding to the first suspected target. It may be determined whether the image generated by the imaging signal detected in the third working state has the first suspected target based on the comparison between the readout signal and the preset electrical signal range corresponding to the first suspected target, or it may be determined whether the image generated by the imaging signal detected in the third working state has the first suspected target based on the comparison between the digital signal corresponding to the readout signal and the preset digital signal range. The first suspected target may be the outline or part of the outline of the target to be detected. The first suspected target may be one or more of humans, animals, objects, etc. set as needed.

[0215] It should be noted that the first suspected target and the second suspected target may be the same or different.

[0216] In step S405, when a first suspected target temperature range is detected in an image generated by an imaging signal detected in the third working state, the uncooled infrared detector is controlled to switch to the second working state.

[0217] The uncooled infrared detector may be preset with an electrical signal range or a digital signal range corresponding to the first suspected target temperature range. It may be determined whether the first suspected target temperature range is detected in the image generated by the imaging signal detected in the third working state by comparing the readout signal with the preset electrical signal range corresponding to the first suspected target temperature range, or it may be determined whether the first suspected target temperature range is detected in the image generated by the imaging signal detected in the third working state by comparing the digital signal corresponding to the readout signal with the preset digital signal range. The first suspected target temperature range may be the radiation temperature of the target to be detected set as required. If the detection target includes humans, the corresponding first suspected target temperature range may include 36°C-39°C.

[0218] It should be noted that the first suspected target temperature range and the second suspected target temperature range may be the same or different.

[0219] It should be noted that in step S404 and step S405, controlling the uncooled infrared detector to switch to the second working state can be achieved by inputting a control instruction for controlling the uncooled infrared detector readout circuit to execute the second working state.

[0220] If the operator directly switches according to needs, the control of switching the uncooled infrared detector from the third working state to the second working state may include the following step S406:

[0221] When a control instruction for controlling the uncooled infrared detector to execute the second working state is detected in the third working state, the uncooled infrared detector is controlled to execute the second working state.

[0222] When the detector detects a control instruction for controlling the non-refrigerated infrared detector to switch to the second working state, the second working state can be controlled to be executed.

[0223] For a detailed description of controlling the execution of the second working state, reference may be made to the related description in the above-mentioned readout circuit, which will not be repeated here.

[0224] In some embodiments, when the image generated by the imaging signal detected in the third working state has a first suspected target or detects a first suspected target temperature range, before the uncooled infrared detector switches from the third working state to the second working state, the method further includes:

[0225] The reminder is provided through at least one of a reminder audio and a reminder light.

[0226] The method of reminding by at least one of the reminding audio and the reminding light can remind the operator in time and switch to the second working state in time.

[0227] The reminder step can be implemented by setting a reminder module and a reminder module. For details, please refer to the relevant description of the above readout circuit, which will not be repeated here.

[0228] It should be noted that in other embodiments, in the third working state, the uncooled infrared detector can control the uncooled infrared detector readout circuit to switch to the second working state when the readout signal is not within the second preset electrical signal range. Accordingly, when the readout signal is not within the second preset electrical signal range, a reminder can be given by at least one of a reminder audio and a reminder light.

[0229] The second preset electrical signal range corresponds to a voltage signal range or a current signal range preset according to the third working state. The second preset electrical signal range can be set according to specific needs, for example, the second preset electrical signal range can be an electrical signal range under the condition that there is no first suspected target, no first suspected target temperature and normal operation in the third working state. The second preset electrical signal and the first preset electrical signal can be the same or different.

[0230] In some embodiments, a logic control signal is used to control whether a pixel selection signal of each infrared sensitive pixel is invalid, so as to control whether each infrared sensitive pixel is selected.

[0231] In some embodiments, the working state of the uncooled infrared detector is controlled by a logic control signal, and the logic control signal includes any window opening control signal and an enable signal; wherein, in the first working state and the second working state, the infrared sensitive pixel controlled by the enable signal can be selected;

[0232] In the third working state, none of the infrared sensitive picture elements controlled by the enable signal can be enabled.

[0233] In some embodiments, the method further comprises:

[0234] The infrared sensitive picture elements 101 that are not selected are controlled to be disconnected from the power supply circuit 60 .

[0235] The power circuit 60 may be provided with a switch module 601 at the connection of at least part of the infrared sensitive pixels 101, and the infrared sensitive pixels 101 that are not selected may be disconnected from the power circuit 60 by controlling the disconnection of the switch module 601. For other descriptions of disconnecting the infrared sensitive pixels 101 that are not selected from the power circuit 60, reference may be made to the related descriptions of the above-mentioned readout circuit, which will not be repeated here.

[0236] The following combination Fig.13 As shown, taking the first working state as the initial working state, the logic control signal includes the enable signal and as an example, an implementation method of the control method of the uncooled infrared detector readout circuit is described in detail.

[0237] First, step S10 turns on the uncooled infrared detector readout circuit, and then the uncooled infrared detector readout circuit enters step S20 to control the uncooled infrared detector readout circuit to execute the first working state. In the first working state, the enable signal en can be high. The readout signal of the readout circuit module 40 is obtained in the first working state. Then, step S30 is executed to determine whether the first working state meets the detection requirements. When the result of the judgment in step S30 is no, that is, the first working state does not meet the detection requirements, the enable signal en is controlled to be high. Then, step S40 and step S50 are executed. When the judgment result of step S30 is yes, step S610, step S60 and step S70 can be executed in sequence. In step S80, it is determined whether the third state meets the detection requirements. When the judgment structure is yes, step S410 can be entered, otherwise step S610 can be executed continuously.

[0238] It should be noted that, in some other embodiments, when the result of step S30 is yes, the first working state can be continued without performing the operation of step S601. Whether to perform step S601 can be set as needed according to the product usage scenario. For example, the acquired readout signal value is not much different from the first preset electrical signal range, the imaging corresponding to the readout signal in the first working state does not appear the second suspected target or the imaging does not detect the second suspected target temperature, or the operator believes that it is not necessary to reduce the infrared pixel 101 according to the specific scene, and the first working state can be continued. For another example, when the acquired readout signal value is greatly different from the first preset signal range, or the target object is not detected within the preset time range in the first working state, or the non-cooled infrared detector is detected in the first working state. In a low power mode that cannot be detected normally, or the operator believes that the infrared pixel 101 can be reduced according to the specific scene (such as standby), etc., step S601 can be performed to switch to the third working state.

[0239] If the readout signal needs to be switched to the second working state when it is not within the first preset electrical signal range, the number and area of ​​infrared sensitive pixels 101 that need to be selected in the second working state can be determined based on the difference between the electrical signal value in the first working state obtained by the readout circuit module 40 and the first preset electrical signal range, or if the operator believes that additional infrared sensitive pixels 101 are needed based on the specific scenario.

[0240] It should be noted that, for any window opening module 90 that needs to work, each time the working state is switched, a corresponding arbitrary window opening selection signal can be automatically generated as needed through external input or the digital control module.

[0241] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A control method for an uncooled infrared detector, applied to an uncooled infrared detector, characterized in that: The uncooled infrared detector includes an uncooled infrared focal plane array having multiple rows and columns of infrared sensitive pixels, and the control method includes: Controlling the uncooled infrared detector to execute a first working state; in the first working state, part of the infrared sensitive pixels are selected to read out signals; Control the uncooled infrared detector to switch to a second working state; in the second working state, at least part of the infrared sensitive pixels are selected to read out signals; wherein the number of infrared sensitive pixels selected in the second working state is greater than the number of infrared sensitive pixels selected in the first working state.

2. The control method of the uncooled infrared detector according to claim 1, characterized in that: The method further comprises: The uncooled infrared detector is controlled to switch from the first working state to the third working state, wherein the number of infrared sensitive pixels selected in the third working state is less than or equal to the number of infrared sensitive pixels selected in the first working state.

3. The control method of the uncooled infrared detector according to claim 2, characterized in that: The method further comprises: The uncooled infrared detector is controlled to switch from the third working state to the second working state.

4. The control method of the uncooled infrared detector according to claim 3, characterized in that: When the image generated by the imaging signal detected in the third working state has a first suspected target, controlling the uncooled infrared detector to switch to the second working state; and / or, When a first suspected target temperature range is detected in an image generated by an imaging signal detected in the third working state, controlling the uncooled infrared detector to switch to the second working state; or, When a control instruction for controlling the uncooled infrared detector to execute the second working state is detected in the third working state, the uncooled infrared detector is controlled to execute the second working state.

5. The control method of the uncooled infrared detector according to claim 2 or 3, characterized in that: When the target object is not detected within a preset time range in the first working state, the uncooled infrared detector is controlled to switch from the first working state to the third working state; or, When it is detected in the first working state that the uncooled infrared detector is in a low power mode where it cannot detect normally, the uncooled infrared detector is controlled to execute a third working state; or, When a control instruction for controlling the uncooled infrared detector to execute the third working state is detected in the first working state, the uncooled infrared detector is controlled to execute the third working state.

6. The control method of the uncooled infrared detector according to any one of claims 1 to 3, characterized in that: When the image generated by the imaging signal detected in the first working state has a second suspected target, controlling the uncooled infrared detector to switch to the second working state; and / or, When a second suspected target temperature range is detected in an image generated by an imaging signal detected in the first working state, controlling the uncooled infrared detector to switch to a second working state; or, When a control instruction for controlling the uncooled infrared detector to execute the second working state is detected in the first working state, the uncooled infrared detector is controlled to execute the second working state.

7. The control method of the uncooled infrared detector according to claim 6, characterized in that: When the image generated by the imaging signal detected in the first working state has a second suspected target or detects a second suspected target temperature range, before the uncooled infrared detector switches to the second working state, the method further includes: The reminder is provided through at least one of a reminder audio and a reminder light.

8. The control method of the uncooled infrared detector according to any one of claims 1 to 3, characterized in that: For the third working state, when an image generated by an imaging signal detected in the third working state has a first suspected target or a first suspected target temperature range is detected, before the uncooled infrared detector switches from the third working state to the second working state, the method further includes: The reminder is provided through at least one of a reminder audio and a reminder light.

9. The control method of the uncooled infrared detector according to any one of claims 1 to 3, characterized in that: After the uncooled infrared detector is turned on, the uncooled infrared detector is controlled to execute the first working state; or, after the uncooled infrared detector is turned on, the uncooled infrared detector is controlled to execute the first working state by inputting a control instruction.

10. The control method of the uncooled infrared detector according to any one of claims 1 to 3, characterized in that: Control whether the pixel selection signal of each infrared sensitive pixel is invalid, so as to control whether each infrared sensitive pixel is selected.

11. The control method of the uncooled infrared detector according to any one of claims 1 to 3, characterized in that: The working state of the uncooled infrared detector is controlled by a logic control signal, wherein the logic control signal includes any window opening control signal and an enable signal; wherein in the first working state and the second working state, the infrared sensitive pixel controlled by the enable signal can be selected; In the third working state, none of the infrared sensitive picture elements controlled by the enable signal can be enabled.

12. The control method of the uncooled infrared detector according to claim 1, characterized in that: The method further comprises: The infrared sensitive picture elements which are not selected are controlled to be disconnected from the power supply circuit.

13. An uncooled infrared detector readout circuit, characterized in that: The uncooled infrared detector readout circuit comprises: An uncooled infrared focal plane array including multiple rows and columns of infrared sensitive pixels; A pixel gating module is connected to each infrared sensitive pixel; A logic control module, connected to the pixel selection module and at least part of the infrared sensitive pixels through a logic gate circuit, capable of controlling the uncooled infrared detector readout circuit to switch from a first working state to a second working state; wherein the number of infrared sensitive pixels selected in the second working state is greater than the number of infrared sensitive pixels selected in the first working state; The readout circuit module is connected to each infrared sensitive pixel and can read out the signal of the selected infrared sensitive pixel.

14. The uncooled infrared detector readout circuit according to claim 13, characterized in that: The logic control module can control the uncooled infrared detector readout circuit to switch from the first working state to the third working state, wherein the number of infrared sensitive pixels selected in the third working state is less than or equal to the number of infrared sensitive pixels selected in the first working state.

15. The uncooled infrared detector readout circuit according to claim 14, characterized in that: The logic control module can also control the uncooled infrared detector readout circuit to switch from the third working state to the second working state.

16. The uncooled infrared detector readout circuit according to any one of claims 13 to 15, characterized in that: The logic control module can send corresponding logic control signals to each connected infrared sensitive pixel, and the pixel selection module can send a pixel selection signal to each infrared sensitive pixel. The logic control signal controls whether the corresponding infrared sensitive pixel is selected by controlling whether the pixel selection signal of the corresponding infrared sensitive pixel is invalid.

17. The uncooled infrared detector readout circuit according to claim 16, characterized in that: The logic control module includes an arbitrary window opening module and an enabling module; The enabling module is connected to some infrared sensitive pixels; the enabling module can send an enabling signal to the connected infrared sensitive pixels; The arbitrary window opening module is connected to at least part of the infrared sensitive pixels, and can send an arbitrary window opening signal with gating start and end information to the infrared sensitive pixels connected to the arbitrary window opening module; Among them, some infrared sensitive pixels are connected to both the enabling module and the arbitrary windowing module as first preset infrared sensitive pixels; the pixel selection module, the enabling module and the arbitrary windowing module are connected to the corresponding first preset infrared sensitive pixels through a preset logic gate circuit; and in the second working state, at least some of the first preset infrared sensitive pixels connected to both the enabling module and the arbitrary windowing module are selected; and when there is a third working state, in the third working state, none of the infrared sensitive pixels connected to the enabling module are selected.

18. The uncooled infrared detector readout circuit according to claim 17, characterized in that: The logic gate circuit is an AND gate circuit, or the logic gate circuit is a NOR gate circuit.

19. The uncooled infrared detector readout circuit according to claim 18, characterized in that: The pixel gating module includes a row gating module and a column gating module, and the logic gate circuit includes a two-level logic gate circuit of a first-level logic gate circuit and a second-level logic gate circuit; wherein, The logic gate circuit includes two first-level logic gate circuits and one second-level logic gate circuit; the second-level logic gate circuit is a two-input logic gate circuit, the output ends of the two first-level logic gate circuits are respectively connected to the two input ends of the second-level logic gate circuit, wherein the input end of one of the first-level logic gate circuits is respectively connected to the arbitrary windowing module, at least one of the enabling modules, and the row selection module, and the input end of the other first-level logic gate circuit is respectively connected to the arbitrary windowing module, at least one of the enabling modules, and the column selection module; or, The logic gate circuit includes a first-level logic gate circuit and a second-level logic gate circuit, the first-level logic gate circuit is a three-input logic gate circuit; the three input ends of the first-level logic gate circuit are respectively connected to one of the row selection module and the column selection module, as well as the arbitrary windowing module and the enabling module, and the output end of the first-level logic gate circuit and the other one of the row selection module and the column selection module are respectively connected to different input ends of the second-level logic gate circuit.

20. The uncooled infrared detector readout circuit according to claim 17, characterized in that: The ratio of the number of infrared sensitive pixels connected to the enabling module to the number of all infrared sensitive pixels included in the uncooled infrared focal plane array is greater than or equal to 0.

8.

21. The uncooled infrared detector readout circuit according to claim 13, characterized in that: The uncooled infrared detector readout circuit also includes: A power supply circuit, used for providing power to each of the infrared sensitive pixels; The logic control module is configured to control the infrared sensitive picture elements that are not selected to be disconnected from the power circuit.

22. An infrared detector, characterized in that: The uncooled infrared detector comprises an uncooled infrared detector readout circuit as claimed in any one of claims 13 to 21.

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