Water leakage detection circuit and display screen

Abstract

The utility model discloses a water leakage detection circuit and a display screen, which are applied to the field of display screens. Wherein the input end of the signal acquisition circuit is connected with a pulse signal transmitting end and is used for acquiring a pulse signal transmitted by the pulse signal transmitting end; the control end of the signal acquisition circuit is used for acquiring environment signals; the input end of the signal conditioning circuit is connected with the output end of the signal acquisition circuit, and the signal conditioning circuit is used for outputting target detection signals corresponding to the environment signals and the pulse signals; the input end of the signal detection circuit is connected with the output end of the signal conditioning circuit, and the signal detection circuit is used for determining the water leakage state according to the target detection signal. Therefore, the signal conditioning circuit adjusts the environment signal and the pulse signal acquired by the signal acquisition circuit and further outputs the final target detection signal, and the signal detection circuit determines the current water leakage state of the environment where the water leakage detection circuit is located according to the target detection signal, so that an operator can conveniently overhaul a display screen. The circuit is simple in structure and low in cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of display screen especially, and relates to a water leakage detection circuit and display screen. BACKGROUND

[0002] In the outdoor light emitting diode (LED) display screen, often encounter water leakage problem, and water immersion can cause LED display screen to leak electricity, corrosion, short circuit even take place fire. In order to find water leakage problem in time, find accident hidden danger in advance, need to carry out water leakage alarm in time.

[0003] At present, the water leakage detection sensor for realizing water leakage alarm is difficult to install on the LED display screen, and it is difficult to detect the trace water leakage on the LED display screen, and the cost of such water leakage detection sensor is relatively high.

[0004] In view of the above-mentioned technology, seeking a kind of water leakage detection circuit is the problem that the person skilled in the art urgently solves. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of water leakage detection circuit and display screen, can solve the problem that water leakage detection sensor in prior art is difficult to install in display screen to detect its water leakage state, and the problem of high cost of water leakage detection sensor.

[0006] To solve the above technical problems, on the one hand, the utility model provides a kind of water leakage detection circuit, comprising: signal acquisition circuit, signal conditioning circuit and signal detection circuit;

[0007] The input end of signal acquisition circuit is connected with pulse signal sending end, for obtaining the pulse signal sent by pulse signal sending end;

[0008] The control end of signal acquisition circuit is used for collecting environmental signal;

[0009] The input end of signal conditioning circuit is connected with the output end of signal acquisition circuit, for obtaining environmental signal and pulse signal, and outputting corresponding target detection signal based on environmental signal and pulse signal;

[0010] The input end of signal detection circuit is connected with the output end of signal conditioning circuit, for determining water leakage state according to target detection signal.

[0011] Preferably, it further includes: inverter;

[0012] The input end of inverter is connected with pulse signal sending end and the first end of signal acquisition circuit, and the first end of signal acquisition circuit is used as the input end of signal acquisition circuit;

[0013] The output end of the inverter is connected with the second end of the signal acquisition circuit.

[0014] Preferably, the signal acquisition circuit comprises a first-stage acquisition circuit and a second-stage acquisition circuit.

[0015] The first end of the first-stage acquisition circuit is connected with the first end of the second-stage acquisition circuit, and the first end of the signal acquisition circuit and the input end of the inverter and the pulse signal sending end are connected in common.

[0016] The second end of the first-stage acquisition circuit is connected with the second end of the second-stage acquisition circuit, and the second end of the signal acquisition circuit and the output end of the inverter are connected in common.

[0017] The third end of the first-stage acquisition circuit and the third end of the second-stage acquisition circuit are connected in common as the output end of the signal acquisition circuit and the input end of the signal conditioning circuit.

[0018] Preferably, the first-stage acquisition circuit comprises a first resistor and a second resistor.

[0019] The first end of the first resistor is connected as the first end of the first-stage acquisition circuit with the input end of the inverter, the pulse signal sending end and the first end of the second-stage acquisition circuit.

[0020] The second end of the first resistor is connected with the first end of the second resistor, and the third end of the first-stage acquisition circuit and the input end of the signal conditioning circuit are connected in common.

[0021] The second end of the second resistor is connected as the second end of the first-stage acquisition circuit with the second end of the second-stage acquisition circuit and the output end of the inverter.

[0022] Preferably, the second-stage acquisition circuit comprises a third resistor and a fourth resistor.

[0023] The first end of the third resistor is connected as the first end of the second-stage acquisition circuit with the input end of the inverter, the pulse signal sending end and the first end of the first-stage acquisition circuit.

[0024] The second end of the third resistor is connected with the first end of the fourth resistor, and the third end of the second-stage acquisition circuit and the input end of the signal conditioning circuit are connected in common.

[0025] The second end of the fourth resistor is connected as the second end of the second-stage acquisition circuit with the second end of the first-stage acquisition circuit and the output end of the inverter.

[0026] Preferably, the signal conditioning circuit comprises a comparator.

[0027] The inverting input end of the comparator is connected with the third end of the first-stage acquisition circuit.

[0028] The non-inverting input terminal of the comparator is connected with the third terminal of the second-stage acquisition circuit;

[0029] The output terminal of the comparator is connected with the input terminal of the signal detection circuit as the output terminal of the signal conditioning circuit;

[0030] The non-inverting input terminal of the comparator and the inverting input terminal of the comparator are connected together as the input terminal of the signal conditioning circuit.

[0031] Preferably, the signal conditioning circuit further comprises a fifth resistor;

[0032] The first terminal of the fifth resistor is connected with the non-inverting input terminal of the comparator and the third terminal of the second-stage acquisition circuit;

[0033] The second terminal of the fifth resistor is connected with the output terminal of the comparator and the input terminal of the signal detection circuit.

[0034] Preferably, the signal detection circuit comprises an XOR gate;

[0035] The first input terminal of the XOR gate is connected with the second terminal of the fifth resistor and the output terminal of the comparator as the input terminal of the signal detection circuit;

[0036] The second input terminal of the XOR gate is connected with the second terminal of the first-stage acquisition circuit, the second terminal of the second-stage acquisition circuit and the output terminal of the inverter;

[0037] The output terminal of the XOR gate is the output terminal of the signal detection circuit.

[0038] In another aspect, the present application also provides a display screen comprising the water leakage detection circuit, and further comprising a lamp panel provided with light-emitting pixels;

[0039] The lamp panel is provided with a first conductive line and a second conductive line, and the first conductive line and the second conductive line are arranged in parallel to form a control terminal of the signal acquisition circuit.

[0040] Preferably, the first conductive line is provided with at least one first extension segment extending towards the second conductive line, the second conductive line is provided with at least one second extension segment extending towards the first conductive line, the first extension segment and the second extension segment are arranged in a spaced manner, and the projection of the first extension segment and the second extension segment along the extension direction of the first conductive line and the second conductive line at least partially overlaps.

[0041] This utility model provides a water leakage detection circuit, comprising: a signal acquisition circuit, a signal conditioning circuit, and a signal detection circuit. The input terminal of the signal acquisition circuit is connected to a pulse signal transmitting terminal to acquire the pulse signal transmitted by the pulse signal transmitting terminal. The control terminal of the signal acquisition circuit is used to acquire environmental signals. The input terminal of the signal conditioning circuit is connected to the output terminal of the signal acquisition circuit to acquire environmental signals and pulse signals, and outputs a corresponding target detection signal based on the environmental signals and pulse signals. The input terminal of the signal detection circuit is connected to the output terminal of the signal conditioning circuit to determine the water leakage state based on the target detection signal. Therefore, in the water leakage detection circuit provided in this application, the signal acquisition circuit acquires environmental signals and pulse signals, then the signal conditioning circuit adjusts the environmental signals and pulse signals to output the final target detection signal, and the signal detection circuit determines the water leakage state of the environment in which the water leakage detection circuit is located based on the target detection signal, so that operators can inspect the display screen. The water leakage detection circuit provided in this application has a relatively simple structure, small size, is easy to install in a display screen, and has low cost. Attached Figure Description

[0042] To more clearly illustrate the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This application provides a structural diagram of a water leakage detection circuit;

[0044] Figure 2 A circuit diagram of the leakage detection circuit provided in the embodiments of this application;

[0045] Figure 3 A schematic diagram of a display screen provided in an embodiment of this application;

[0046] Figure 4 This is a schematic diagram of a light panel provided in an embodiment of this application. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0048] The core of this utility model is to provide a water leakage detection circuit and a display screen.

[0049] In order to make the person in the technical field better understand the utility model scheme, the utility model is further explained in detail below in combination with the drawings and specific embodiments.

[0050] Figure 1 The structural diagram of the water leakage detection circuit provided by the present application is shown in FIG. 1. Figure 1 As shown in the figure, the water leakage detection circuit comprises a signal acquisition circuit 1, a signal conditioning circuit 2 and a signal detection circuit 3; in addition, Figure 1 The circuit shown in the figure further comprises a pulse signal sending end 4. The connection relationship of the water leakage detection circuit is that the input end of the signal acquisition circuit 1 is connected with the pulse signal sending end 4; the input end of the signal conditioning circuit 2 is connected with the output end of the signal acquisition circuit 1; the input end of the signal detection circuit 3 is connected with the output end of the signal conditioning circuit 2.

[0051] In a specific embodiment, the water leakage detection circuit provided by the present application is specifically arranged in a display screen (LED display screen), which can be specifically installed at a position where water leakage is prone to occur in the display screen, and further, the signal acquisition circuit 1 is installed at the position where water leakage is prone to occur, for example, a lamp panel provided with light-emitting pixels in the display screen, electronic components and connectors for connecting external circuits are arranged on the back of the lamp panel, and the periphery of the lamp panel and the periphery of the connectors are positions where water leakage is prone to occur. The output end of the main controller (or control card) in the display screen is connected with the signal acquisition circuit 1 as the pulse signal sending end 4, and the pulse signal sending end 4 sends a pulse signal with alternating polarity inversion. Since the signal acquisition circuit 1 is arranged at the position where water leakage is prone to occur, the control end of the signal acquisition circuit 1 will generate an environment signal representing the current environment according to the current scene, that is, the current environment signal is acquired. Since the input end of the signal acquisition circuit 1 is connected with the pulse signal sending end 4, the signal acquisition circuit 1 also acquires the pulse signal sent by the pulse signal sending end 4. The input end of the signal conditioning circuit 2 is connected with the output end of the signal acquisition circuit 1, so that the environment signal and the pulse signal acquired by the signal acquisition circuit 1 can be acquired, and based on its own judgment, a target detection signal corresponding to the environment signal and the pulse signal is output. Since the input end of the signal detection circuit 3 is connected with the output end of the signal conditioning circuit 2, the target detection signal output by the signal conditioning circuit 2 can be acquired, and then based on the circuit function of itself, the current water leakage state (water leakage or no water leakage) is determined.

[0052] Among them, since the signals (environment signal, pulse signal and target detection signal) are all electrical signals, for example, voltage signals, they are prone to be disturbed by electromagnetic waves and the like during transmission, so the signal conditioning circuit 2 and the signal detection circuit 3 not only realize the above functions, but also perform signal filtering and the like during signal transmission.

[0053] Wherein, since the control end of the signal acquisition circuit 1 is used for collecting the environment signal, a component changing with the environment (temperature change, conductivity change, etc.) can be arranged in the signal acquisition circuit 1, and specifically arranged in the control end of the signal acquisition circuit 1, so that when the environment changes, the component in the control end of the signal acquisition circuit 1 changes (for example, the resistance value changes), and based on the change, the environment signal is generated.

[0054] It should be noted that the specific structure of the signal acquisition circuit 1, the signal conditioning circuit 2 and the signal detection circuit 3 is not limited in the embodiment, and can be set by the user as needed.

[0055] As can be seen from the above embodiment, the water leakage detection circuit provided by the utility model, comprising: signal acquisition circuit, signal conditioning circuit and signal detection circuit, wherein, the input end of signal acquisition circuit is connected with pulse signal sending end, for obtaining the pulse signal sent by pulse signal sending end, the control end of signal acquisition circuit is used for collecting environment signal, the input end of signal conditioning circuit is connected with the output end of signal acquisition circuit, for obtaining environment signal and pulse signal, and outputting corresponding target detection signal based on environment signal and pulse signal, the input end of signal detection circuit is connected with the output end of signal conditioning circuit, for determining water leakage state according to target detection signal. It can be seen that in the water leakage detection circuit provided by the application, the signal acquisition circuit is used for collecting environment signal and pulse signal, then the signal conditioning circuit adjusts the environment signal and the pulse signal, and then outputs the final target detection signal, and the signal detection circuit determines the water leakage state of the environment where the water leakage detection circuit is located according to the target detection signal, so that the operator can repair the display screen. The water leakage detection circuit provided by the application has relatively simple structure, small size, is convenient to arrange in the display screen, and has low cost.

[0056] On the basis of the above embodiment, as a preferred embodiment, as shown in Figure 2 The water leakage detection circuit further comprises: an inverter U1. The connection relationship of the circuit is: wherein, the input end of the inverter U1 is connected with the pulse signal sending end 4 and the first end of the signal acquisition circuit 1, and the first end of the signal acquisition circuit 1 serves as the input end of the signal acquisition circuit 1; the output end of the inverter U1 is connected with the second end of the signal acquisition circuit 1. Figure 2 PULSE in the above formula is a pulse signal, and OUTPUT is a signal representing the water leakage state.

[0057] In a specific embodiment, the role of the inverter U1 is to take the opposite of the level of the pulse signal PULSE. When the pulse signal PULSE is high voltage, the inverter U1 outputs low voltage; when the pulse signal PULSE is low voltage, the inverter U1 outputs high voltage, which mainly ensures that the voltage at both ends (the first end and the second end) of the signal acquisition circuit 1 is high and low.

[0058] On the basis of the above embodiment, as a preferred embodiment, as shown in Figure 2 The signal acquisition circuit 1 comprises a first-stage acquisition circuit and a second-stage acquisition circuit. The connection relationship of the circuit is that the first end of the first-stage acquisition circuit is connected with the first end of the second-stage acquisition circuit, and they are connected with the input end of the inverter U1 and the pulse signal sending end together as the first end of the signal acquisition circuit 1; the second end of the first-stage acquisition circuit is connected with the second end of the second-stage acquisition circuit, and they are connected with the output end of the inverter U1 together as the second end of the signal acquisition circuit 1; the third end of the first-stage acquisition circuit and the third end of the second-stage acquisition circuit are connected together as the output end of the signal acquisition circuit 1 and the input end of the signal conditioning circuit 2.

[0059] Further, as shown in Figure 2 The first-stage acquisition circuit comprises a first resistor R1 and a second resistor R2. The second-stage acquisition circuit comprises a third resistor R3 and a fourth resistor R4.

[0060] The connection relationship of the first-stage acquisition circuit is that the first end of the first resistor R1 is connected with the input end of the inverter U1, the pulse signal sending end 4 and the first end of the second-stage acquisition circuit together as the first end of the first-stage acquisition circuit; the second end of the first resistor R1 is connected with the first end of the second resistor R2 together as the third end of the first-stage acquisition circuit and the input end of the signal conditioning circuit 2; the second end of the second resistor R2 is connected with the second end of the second-stage acquisition circuit and the output end of the inverter U2 together as the second end of the first-stage acquisition circuit.

[0061] The connection relationship of the second-stage acquisition circuit is that the first end of the third resistor R3 is connected with the input end of the inverter U1, the pulse signal sending end 4 and the first end of the first-stage acquisition circuit together as the first end of the second-stage acquisition circuit; the second end of the third resistor R3 is connected with the first end of the fourth resistor R4 together as the third end of the second-stage acquisition circuit and the input end of the signal conditioning circuit 2; the second end of the fourth resistor R4 is connected with the second end of the first-stage acquisition circuit and the output end of the inverter U1 together as the second end of the second-stage acquisition circuit.

[0062] In a specific embodiment, the fourth resistor R4 is a component that changes with the environment (temperature, conductivity, etc.) at the control end in the signal acquisition circuit 1 in the above embodiment. In the dry case (the environment signal indicates that the current is in a dry state), the resistance of the fourth resistor R4 is almost infinite, at this time, the high and low level state of the target detection signal output by the signal conditioning circuit is the same as the high and low level state of the pulse signal PULSE. In the water immersion case (the environment signal indicates that the current is in a water leakage state), the resistance of the fourth resistor R4 will decrease, when the ratio of the fourth resistor R4 to the third resistor R3 is less than the ratio of the second resistor R2 to the first resistor R1, at this time, the high and low level state of the target detection signal output by the signal conditioning circuit is opposite to the high and low level state of the pulse signal PULSE.

[0063] Similarly, as shown in Figure 2 The signal conditioning circuit 2 includes a comparator U2 and a fifth resistor R5. The connection relationship of the signal conditioning circuit 2 is: the inverting input end of the comparator U2 is connected with the third end of the first stage acquisition circuit; the non-inverting input end of the comparator U2 is connected with the third end of the second stage acquisition circuit; the output end of the comparator U2 is connected with the input end of the signal detection circuit 3 as the output end of the signal conditioning circuit 2; the non-inverting input end of the comparator U2 and the inverting input end of the comparator U2 are connected as the input end of the signal conditioning circuit 2; the first end of the fifth resistor R5 is connected with the non-inverting input end of the comparator U2 and the third end of the second stage acquisition circuit; the second end of the fifth resistor R5 is connected with the output end of the comparator U2 and the input end of the signal detection circuit 3.

[0064] In a specific embodiment, in the dry case, the signal input by the non-inverting input end of the comparator U2 is approximately the pulse signal PULSE, and the voltage thereof is close to the voltage corresponding to the pulse signal PULSE. In the water immersion case, the resistance of the fourth resistor R4 will decrease, and at this time, the voltage input by the non-inverting input end of the comparator U2 is closer to the reverse voltage corresponding to the pulse signal PULSE. When the ratio of the fourth resistor R4 to the third resistor R3 is less than the ratio of the second resistor R2 to the first resistor R1, the voltage of the target detection signal output by the comparator U2 is the reverse of the voltage of the pulse signal PULSE (it can also be understood that the high and low level state of the target detection signal output by the comparator U2 is opposite to the high and low level state of the pulse signal PULSE).

[0065] Because of the uncertainty of the degree of water immersion, it is possible to cause the comparator U2 to oscillate around the judgment threshold. Therefore, the fifth resistor R5 is added as a hysteresis adjusting resistor in the signal conditioning circuit 2. Because the comparator U2 has a certain voltage hysteresis characteristic after turning over, the current circuit will not output oscillation due to the small amplitude fluctuation of the fourth resistor R4 caused by water immersion.

[0066] The signal detection circuit 3 comprises an XOR gate U3 and a first capacitor C1. The connection relationship of the signal detection circuit 3 is as follows: the first input end of the XOR gate U3 is connected with the second end of the fifth resistor R5 and the output end of the comparator U2 as the input end of the signal detection circuit 3; the second input end of the XOR gate U3 is connected with the second end of the first-stage acquisition circuit, the second end of the second-stage acquisition circuit and the output end of the inverter U1; the output end of the XOR gate U3 is the output end of the signal detection circuit 3; the first end of the first capacitor C1 is connected with the output end of the XOR gate U3; and the second end of the first capacitor C1 is grounded.

[0067] In a specific embodiment, the XOR gate U3 is used to judge whether the high and low level states of the target detection signal output by the comparator U2 and the high and low level states of the pulse signal PULSE are the same or opposite. When they are the same, a high level is output, indicating no water immersion (no water leakage state); when they are opposite, a low level is output, indicating water immersion (water leakage state). The first capacitor C1 prevents the XOR gate U3 from outputting a narrow pulse glitch due to timing. The reason is that the first capacitor C1 can filter out the glitch to avoid false operation of the subsequent circuit.

[0068] In addition, Figure 2 The middle part further comprises five detection points, namely P1, P2, P3, P4 and P5.

[0069] In an embodiment, when in the no water leakage state (i.e. no water immersion), and the signal at P1 is a high level, the signal at P2 is a high level, the signal at P3 is a high level, the signal at P4 is a low level, and the signal at P5 is a high level.

[0070] When in the no water leakage state (i.e. no water immersion), and the signal at P1 is a low level, the signal at P2 is a low level, the signal at P3 is a low level, the signal at P4 is a high level, and the signal at P5 is a high level.

[0071] When in the water leakage state (i.e. water immersion), and the signal at P1 is a high level, the signal at P2 is a low level, the signal at P3 is a low level, the signal at P4 is a low level, and the signal at P5 is a low level.

[0072] When in the water leakage state (i.e. water immersion), and the signal at P1 is a low level, the signal at P2 is a high level, the signal at P3 is a high level, the signal at P4 is a high level, and the signal at P5 is a low level.

[0073] It should be noted that the embodiments provided in the present application are only one possible implementation, but are not limited to only this implementation. Users can set it themselves according to their needs.

[0074] The utility model provides a kind of water leakage detection circuit, comprising: signal acquisition circuit, signal conditioning circuit and signal detection circuit;Wherein, the input end of signal acquisition circuit is connected with pulse signal sending end, for obtaining the pulse signal sent by pulse signal sending end;The control end of signal acquisition circuit is used to collect environmental signal;The input end of signal conditioning circuit is connected with the output end of signal acquisition circuit, for obtaining environmental signal and pulse signal, and based on environmental signal and pulse signal output corresponding target detection signal;The input end of signal detection circuit is connected with the output end of signal conditioning circuit, for determining water leakage state according to target detection signal.It can be seen that in the water leakage detection circuit provided in the present application, the signal acquisition circuit is used to collect environmental signal and pulse signal, and then the signal conditioning circuit adjusts environmental signal and pulse signal, and then outputs the final target detection signal, and the signal detection circuit determines the water leakage state of the environment where the current water leakage detection circuit is located according to the target detection signal, so that the operator can overhaul the display screen.The water leakage detection circuit provided in the present application has relatively simple structure, small size, is easy to arrange in the display screen, and has low cost.

[0075] On the other hand, the present application also provides a display screen 5, comprising the above-mentioned water leakage detection circuit, further comprising a lamp panel 6 provided with light-emitting pixels, the number of which can be set according to the size of the display screen, as shown in detail in Figure 3 .

[0076] The schematic diagram of the lamp panel 6 is shown in Figure 4 , which is provided with a first conductive circuit (which can be understood as the positive pole + of the circuit) and a second conductive circuit (which can be understood as the negative pole - of the circuit), and the first conductive circuit and the second conductive circuit are arranged in parallel to form the control end of the signal acquisition circuit. At least one first extension section is arranged on the first conductive circuit extending towards the second conductive circuit, and at least one second extension section is arranged on the second conductive circuit extending towards the first conductive circuit, and the first extension section and the second extension section are arranged in a spaced manner. The projection of the first extension section and the second extension section in the extension direction of the first conductive circuit and the second conductive circuit at least partially overlaps.

[0077] The design principle is that the lamp panel 6 can be understood as a variable resistance, and the corresponding resistance value of the lamp panel 6 needs to change when it is in a water leakage state and a dry state, so that the output of the overall circuit changes, and then the state of the current display screen is determined. In order to make the effect more obvious, the lamp panel 6 needs to have high environmental detection sensitivity during design, that is, it is necessary to ensure that the resistance decreases as much as possible (the resistance value changes greatly) after the lamp panel 6 is immersed in water, so that the output change is more obvious, and therefore the design scheme of Figure 4 is adopted.

[0078] It should be noted that, in order to avoid the direct current signal causing ionization of the water infiltration area, thereby causing the corresponding resistance value of the lamp plate 6 to be unstable, the first conductive circuit and the second conductive circuit are applied with pulse signals with polarity alternately reversed.

[0079] The display screen provided by the present application has the same embodiments as the above-mentioned water leakage detection circuit, and thus the present application will not be described here. The display screen provided by the present application has the same beneficial effects as the above-mentioned water leakage detection circuit.

[0080] The above describes in detail the water leakage detection circuit and the display screen provided by the present application. The embodiments in the specification are described in a progressive manner, and each embodiment mainly describes the differences from other embodiments. The same or similar parts of each embodiment can be referred to. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part. It should be pointed out that, for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0081] It should be further noted that, in the present specification, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A water leak detection circuit, characterized by, The signal acquisition circuit, the signal conditioning circuit and the signal detection circuit are included. The input end of the signal acquisition circuit is connected with the pulse signal sending end, and is used for acquiring the pulse signal sent by the pulse signal sending end. The control end of the signal acquisition circuit is used for collecting the environment signal. The input end of the signal conditioning circuit is connected with the output end of the signal acquisition circuit, and is used for acquiring the environment signal and the pulse signal, and outputting the corresponding target detection signal based on the environment signal and the pulse signal. The input end of the signal detection circuit is connected with the output end of the signal conditioning circuit, and is used for determining the water leakage state according to the target detection signal. The inverter is further included.

2. The water leak detection circuit of claim 1, wherein The input end of the inverter is connected with the pulse signal sending end and the first end of the signal acquisition circuit, and the first end of the signal acquisition circuit serves as the input end of the signal acquisition circuit. The output end of the inverter is connected with the second end of the signal acquisition circuit. The signal acquisition circuit includes the first-stage acquisition circuit and the second-stage acquisition circuit. The first end of the first-stage acquisition circuit is connected with the first end of the second-stage acquisition circuit, and serves as the first end of the signal acquisition circuit and the input end of the inverter and the pulse signal sending end.

3. The water leak detection circuit of claim 2, wherein, The second end of the first-stage acquisition circuit is connected with the second end of the second-stage acquisition circuit, and serves as the second end of the signal acquisition circuit and the output end of the inverter. The third end of the first-stage acquisition circuit and the third end of the second-stage acquisition circuit serve as the output end of the signal acquisition circuit and the input end of the signal conditioning circuit. The first-stage acquisition circuit includes the first resistor and the second resistor. The first end of the first resistor serves as the first end of the first-stage acquisition circuit and is connected with the input end of the inverter, the pulse signal sending end and the first end of the second-stage acquisition circuit.

4. The water leak detection circuit of claim 3, wherein The second end of the first resistor is connected with the first end of the second resistor, and serves as the third end of the first-stage acquisition circuit and the input end of the signal conditioning circuit. The second end of the second resistor serves as the second end of the first-stage acquisition circuit and is connected with the second end of the second-stage acquisition circuit and the output end of the inverter. The second-stage acquisition circuit includes the third resistor and the fourth resistor. The first end of the third resistor serves as the first end of the second-stage acquisition circuit and is connected with the input end of the inverter, the pulse signal sending end and the first end of the first-stage acquisition circuit.

5. The water leak detection circuit of claim 4, wherein, The second end of the third resistor is connected with the first end of the fourth resistor, and serves as the third end of the second-stage acquisition circuit and the input end of the signal conditioning circuit. The second end of the fourth resistor serves as the second end of the second-stage acquisition circuit and is connected with the second end of the first-stage acquisition circuit and the output end of the inverter. The signal conditioning circuit includes the comparator. The inverting input end of the comparator is connected with the third end of the first-stage acquisition circuit.

6. The water leak detection circuit of any one of claims 3-5, wherein, The non-inverting input end of the comparator is connected with the third end of the second-stage acquisition circuit. ​ ​ An output end of the comparator is connected with an input end of the signal detection circuit as an output end of the signal conditioning circuit. The non-inverting input end of the comparator and the inverting input end of the comparator are connected together as an input end of the signal conditioning circuit.

7. The water leak detection circuit of claim 6, wherein, The signal conditioning circuit further comprises a fifth resistor. A first end of the fifth resistor is connected with the non-inverting input end of the comparator and a third end of the second-stage acquisition circuit. A second end of the fifth resistor is connected with the output end of the comparator and the input end of the signal detection circuit.

8. The leak detection circuit of claim 7, wherein, The signal detection circuit comprises an XOR gate. A first input end of the XOR gate is connected with the second end of the fifth resistor and the output end of the comparator as an input end of the signal detection circuit. A second input end of the XOR gate is connected with the second end of the first-stage acquisition circuit, the second end of the second-stage acquisition circuit and the output end of the inverter. An output end of the XOR gate is an output end of the signal detection circuit.

9. A display screen, characterized by The water leakage detection circuit comprises the lamp panel provided with the light-emitting pixels. The lamp panel is provided with a first conductive circuit and a second conductive circuit, and the first conductive circuit and the second conductive circuit are arranged in parallel to form a control end of the signal acquisition circuit.

10. The display screen of claim 9, wherein, The first conductive circuit is provided with at least one first extension segment extending towards the second conductive circuit, the second conductive circuit is provided with at least one second extension segment extending towards the first conductive circuit, and the first extension segment and the second extension segment are arranged in a spaced manner; in the extension direction of the first conductive circuit and the second conductive circuit, the projection of the first extension segment and the second extension segment at least partially overlaps.

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