Water ingress detection circuit and display screen

Abstract

Embodiments of the present disclosure provide a water ingress detection circuit and a display screen, applied to the field of display screens. The water ingress detection circuit comprises: a signal acquisition circuit, a signal conditioning circuit and a signal detection circuit, wherein an input end of the signal acquisition circuit is connected to a pulse signal sending end, and is configured to acquire a pulse signal sent by the pulse signal sending end; a control end of the signal acquisition circuit is configured to acquire an environmental signal; an input end of the signal conditioning circuit is connected to an output end of the signal acquisition circuit, and is configured to output the environmental signal and a target detection signal corresponding to the pulse signal; and an input end of the signal detection circuit is connected to an output end of the signal conditioning circuit, and is configured to determine a water ingress state on the basis of the target detection signal.

Description

A leak detection circuit and display screen

[0001] Cross-references

[0002] This application claims priority to Chinese Patent Application No. 202423309857.X, filed on December 30, 2024, entitled "A Leakage Detection Circuit and Display Screen", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to, but is not limited to, the field of displays, such as a water leakage detection circuit and a display. Background Technology

[0004] Water leakage is a common problem in outdoor light-emitting diode (LED) displays. Water immersion can lead to electrical leakage, corrosion, short circuits, and even fires. To detect leaks promptly and identify potential hazards in advance, timely leak alarms are necessary.

[0005] Public content

[0006] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0007] This disclosure provides a water leakage detection circuit and a display screen, which can solve the problems of water leakage detection sensors being difficult to install in the display screen to detect water leakage status, as well as the high cost of water leakage detection sensors.

[0008] On one hand, this disclosure provides a water leakage detection circuit, including: a signal acquisition circuit, a signal conditioning circuit, and a signal detection circuit;

[0009] The input terminal of the signal acquisition circuit is connected to the pulse signal transmitting terminal and is configured to acquire the pulse signal transmitted by the pulse signal transmitting terminal.

[0010] The control terminal of the signal acquisition circuit is configured to acquire environmental signals;

[0011] The input terminal of the signal conditioning circuit is connected to the output terminal of the signal acquisition circuit, configured to acquire ambient signals and pulse signals, and output corresponding target detection signals based on the ambient signals and pulse signals; and

[0012] The input terminal of the signal detection circuit is connected to the output terminal of the signal conditioning circuit, and is configured to determine the leakage status based on the target detection signal.

[0013] Optionally, it also includes: an inverter;

[0014] In this circuit, the input terminal of the inverter is connected to both the pulse signal transmitting terminal and the first terminal of the signal acquisition circuit, with the first terminal of the signal acquisition circuit serving as its input terminal; and

[0015] The output of the inverter is connected to the second terminal of the signal acquisition circuit.

[0016] Optionally, the signal acquisition circuit includes: a first-stage acquisition circuit and a second-stage acquisition circuit;

[0017] The first terminal of the first-stage acquisition circuit is connected to the first terminal of the second-stage acquisition circuit, and together they serve as the first terminal of the signal acquisition circuit, which is connected to the input terminal of the inverter and the pulse signal transmission terminal.

[0018] The second terminal of the first-stage acquisition circuit is connected to the second terminal of the second-stage acquisition circuit, and together they serve as the second terminal of the signal acquisition circuit connected to the output terminal of the inverter; and

[0019] The third terminal of the first-stage acquisition circuit and the third terminal of the second-stage acquisition circuit are combined as the output terminal of the signal acquisition circuit and connected to the input terminal of the signal conditioning circuit.

[0020] Optionally, the first-stage acquisition circuit includes: a first resistor and a second resistor;

[0021] The first end of the first resistor serves as the first end of the first-stage acquisition circuit and is connected to the input end of the inverter, the pulse signal transmitting end, and the first end of the second-stage acquisition circuit.

[0022] The second terminal of the first resistor is connected to the first terminal of the second resistor, and together they form the third terminal of the first-stage acquisition circuit, which is connected to the input terminal of the signal conditioning circuit; and

[0023] The second end of the second resistor is connected to 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.

[0024] Optionally, the second-stage acquisition circuit includes: a third resistor and a fourth resistor;

[0025] The first end of the third resistor is connected to the first end of the second-stage acquisition circuit, the input end of the inverter, the pulse signal transmitting end, and the first end of the first-stage acquisition circuit.

[0026] The second terminal of the third resistor is connected to the first terminal of the fourth resistor, and together they form the third terminal of the second-stage acquisition circuit, which is connected to the input terminal of the signal conditioning circuit; and

[0027] The second terminal of the fourth resistor is connected to the second terminal of the second-stage acquisition circuit, the second terminal of the first-stage acquisition circuit, and the output terminal of the inverter.

[0028] Optionally, the signal conditioning circuit includes a comparator;

[0029] The inverting input of the comparator is connected to the third terminal of the first-stage acquisition circuit.

[0030] The non-inverting input of the comparator is connected to the third terminal of the second-stage acquisition circuit;

[0031] The comparator's output is connected to the signal conditioning circuit's output and the signal detection circuit's input; and

[0032] The non-inverting input and the inverting input of the comparator are used together as the input of the signal conditioning circuit.

[0033] Optionally, the signal conditioning circuit may further include: a fifth resistor;

[0034] The first terminal of the fifth resistor is connected to the non-inverting input of the comparator and the third terminal of the second-stage acquisition circuit; and

[0035] The second end of the fifth resistor is connected to the output of the comparator and the input of the signal detection circuit.

[0036] Optionally, the signal detection circuit includes an XOR gate;

[0037] The first input terminal of the XOR gate is connected to the second terminal of the fifth resistor and the output terminal of the comparator, serving as the input terminal of the signal detection circuit.

[0038] The second input terminal of the XOR gate is connected to 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; and

[0039] The output of the XOR gate is used as the output of the signal detection circuit.

[0040] On the other hand, this disclosure also provides a display screen, including the above-mentioned water leakage detection circuit, and also includes a lamp board with light-emitting pixels;

[0041] The lamp board is provided with a first conductive line and a second conductive line, which are arranged in parallel to form the control terminal of the signal acquisition circuit.

[0042] Optionally, the first conductive line extends toward the second conductive line and is provided with at least one first extension segment, the second conductive line extends toward the first conductive line and is provided with at least one second extension segment, the first extension segment and the second extension segment are spaced apart; and, along the extension direction of the first conductive line and the second conductive line, the projections of the first extension segment and the second extension segment at least partially overlap.

[0043] This disclosure 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 and configured to acquire pulse signals transmitted by the pulse signal transmitting terminal. The control terminal of the signal acquisition circuit is configured to acquire environmental signals. The input terminal of the signal conditioning circuit is connected to the output terminal of the signal acquisition circuit and configured to acquire environmental signals and pulse signals, and output 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 and configured to determine the water leakage state based on the target detection signal. Therefore, in the water leakage detection circuit provided in this disclosure, the signal acquisition circuit is configured to acquire 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 disclosure has a relatively simple structure, small size, is easy to install in a display screen, and has low cost.

[0044] After reading and understanding the accompanying diagrams and detailed descriptions, the other aspects can be understood. Attached Figure Description

[0045] To more clearly illustrate the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly introduced below. The accompanying drawings described below are only embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 is a structural diagram of a water leakage detection circuit provided in an embodiment of this disclosure;

[0047] Figure 2 is a circuit diagram of the water leakage detection circuit provided in an embodiment of this disclosure;

[0048] Figure 3 is a schematic diagram of the display screen provided in an embodiment of this disclosure;

[0049] Figure 4 is a schematic diagram of the lamp panel provided in an embodiment of this disclosure. Detailed Implementation

[0050] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the embodiments of this disclosure.

[0051] In implementing the embodiments of this disclosure, the applicant found that the leak detection sensor used to implement the leak alarm is difficult to install on the LED display screen, and it is difficult to detect even a small amount of leaks on the LED display screen. In addition, the cost of such leak detection sensors is relatively high.

[0052] In view of the above situation, there is an urgent need to find a leak detection circuit.

[0053] This disclosure provides a water leakage detection circuit and a display screen.

[0054] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings and implementation methods.

[0055] Figure 1 is a structural diagram of a water leakage detection circuit provided in an embodiment of this disclosure. As shown in Figure 1, the water leakage detection circuit includes: a signal acquisition circuit 1, a signal conditioning circuit 2, and a signal detection circuit 3; in addition, the circuit shown in Figure 1 also includes: a pulse signal transmitting terminal 4. The connection relationship of the water leakage detection circuit is as follows: the input terminal of the signal acquisition circuit 1 is connected to the pulse signal transmitting terminal 4; the input terminal of the signal conditioning circuit 2 is connected to the output terminal of the signal acquisition circuit 1; and the input terminal of the signal detection circuit 3 is connected to the output terminal of the signal conditioning circuit 2.

[0056] In some embodiments, the water leakage detection circuit provided in this disclosure is installed in a display screen (LED display screen). It can be installed at a location on the display screen prone to water leakage. Optionally, the signal acquisition circuit 1 is installed at a location prone to water leakage. For example, the display screen has a light board with light-emitting pixels, and electronic components and connectors for connecting external circuits are located on the back of the light board. The edges of the light board and the area around the connectors are locations prone to water leakage. The output terminal of the main controller (or control card) in the display screen is connected to the signal acquisition circuit 1 as a pulse signal transmitter 4. The pulse signal transmitter 4 transmits pulse signals with alternating polarity reversals. Since the signal acquisition circuit 1 is installed at the water leakage location, its control terminal generates an environmental signal characterizing the current environment based on the current scene, i.e., it acquires the current environmental signal. Since the input terminal of the signal acquisition circuit 1 is connected to the pulse signal transmitter 4, the signal acquisition circuit 1 also acquires the pulse signal transmitted by the pulse signal transmitter 4. The input terminal of signal conditioning circuit 2 is connected to the output terminal of signal acquisition circuit 1, thus it can acquire the environmental signals and pulse signals acquired by signal acquisition circuit 1, and output the target detection signal corresponding to the environmental signals and pulse signals based on its own judgment. Since the input terminal of signal detection circuit 3 is connected to the output terminal of signal conditioning circuit 2, it can acquire the target detection signal output by signal conditioning circuit 2, and then determine the current leakage status (leaking or not leaking) based on its own circuit function.

[0057] Since the signals (environmental signals, pulse signals, and target detection signals) are all electrical signals, such as voltage signals, they are easily affected by electromagnetic interference during transmission. Therefore, in addition to performing the above functions, the signal conditioning circuit 2 and the signal detection circuit 3 also perform signal filtering and other operations during signal transmission.

[0058] Since the control terminal of the signal acquisition circuit 1 is configured to acquire environmental signals, a component that changes with the environment (temperature change, conductivity change, etc.) can be placed in the signal acquisition circuit 1 and in the control terminal of the signal acquisition circuit 1. Therefore, when the environment changes, the component at the control terminal of the signal acquisition circuit 1 changes (e.g., the resistance value changes), and an environmental signal is generated based on this change.

[0059] This embodiment does not limit the structure of the signal acquisition circuit 1, the signal conditioning circuit 2, and the signal detection circuit 3; they can be configured according to the user's needs.

[0060] As can be seen from the above embodiments, the water leakage detection circuit provided in this disclosure includes: a signal acquisition circuit, a signal conditioning circuit, and a signal detection circuit; wherein, the input terminal of the signal acquisition circuit is connected to the pulse signal transmitting terminal and configured to acquire the pulse signal transmitted by the pulse signal transmitting terminal; the control terminal of the signal acquisition circuit is configured to acquire environmental signals; the input terminal of the signal conditioning circuit is connected to the output terminal of the signal acquisition circuit and configured to acquire environmental signals and pulse signals, and output 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 and configured to determine the water leakage state based on the target detection signal. Therefore, in the water leakage detection circuit provided in this disclosure, the signal acquisition circuit is configured to acquire 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 disclosure has a relatively simple structure, small size, is easy to install in the display screen, and has low cost.

[0061] Based on the above embodiments, as one example shown in Figure 2, the leak detection circuit further includes an inverter U1. The circuit connection is as follows: the input terminal of the inverter U1 is connected to the pulse signal transmitting terminal 4 and the first terminal of the signal acquisition circuit 1, with the first terminal of the signal acquisition circuit 1 serving as its input terminal; the output terminal of the inverter U1 is connected to the second terminal of the signal acquisition circuit 1. In Figure 2, PULSE represents a pulse signal, and OUTPUT represents a signal characterizing the leak status.

[0062] In some embodiments, the inverter U1 is used to invert 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. This mainly ensures that the voltage at one end (the first end and the second end) of the signal acquisition circuit 1 is high and the voltage at the other end are low.

[0063] Based on the above embodiments, as shown in Figure 2, the signal acquisition circuit 1 includes a first-stage acquisition circuit and a second-stage acquisition circuit. The circuit connections are as follows: the first terminal of the first-stage acquisition circuit is connected to the first terminal of the second-stage acquisition circuit, and together they serve as the first terminal of signal acquisition circuit 1, connected to the input terminal of inverter U1 and the pulse signal transmitting terminal; the second terminal of the first-stage acquisition circuit is connected to the second terminal of the second-stage acquisition circuit, and together they serve as the second terminal of signal acquisition circuit 1, connected to the output terminal of inverter U1; the third terminal of the first-stage acquisition circuit and the third terminal of the second-stage acquisition circuit together serve as the output terminal of signal acquisition circuit 1, connected to the input terminal of signal conditioning circuit 2.

[0064] Optionally, as shown in Figure 2, the first-stage acquisition circuit includes a first resistor R1 and a second resistor R2. The second-stage acquisition circuit includes a third resistor R3 and a fourth resistor R4.

[0065] The connection relationship of its first-stage acquisition circuit is as follows: the first end of the first resistor R1 is connected to the input terminal of the inverter U1, the pulse signal transmitting terminal 4, and the first end of the second-stage acquisition circuit as the first terminal of the first-stage acquisition circuit; the second end of the first resistor R1 is connected to the first end of the second resistor R2, and together they are connected to the input terminal of the signal conditioning circuit 2 as the third terminal of the first-stage acquisition circuit; the second end of the second resistor R2 is connected to 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 U2 as the second terminal of the first-stage acquisition circuit.

[0066] The connection relationship of its second-stage acquisition circuit is as follows: the first end of the third resistor R3 is connected to the input terminal of the inverter U1, the pulse signal transmitting terminal 4, and the first terminal of the first-stage acquisition circuit as the first terminal of the second-stage acquisition circuit; the second end of the third resistor R3 is connected to the first end of the fourth resistor R4, and together they are connected to the input terminal of the signal conditioning circuit 2 as the third terminal of the second-stage acquisition circuit; the second end of the fourth resistor R4 is connected to the second terminal of the second-stage acquisition circuit, the second terminal of the first-stage acquisition circuit, and the output terminal of the inverter U1 as the second terminal of the second-stage acquisition circuit.

[0067] In some embodiments, the fourth resistor R4 serves as a component located at the control terminal of the signal acquisition circuit 1 in the above embodiments, which changes with the environment (temperature changes, conductivity changes, etc.). In dry conditions (where the environmental signal indicates a dry state), the resistance of the fourth resistor R4 is nearly infinite, and the high / low level state of the target detection circuit output by the signal conditioning circuit is the same as the high / low level state of the pulse signal PULSE. In water immersion conditions (where the environmental signal indicates a water leakage state), the resistance of the fourth resistor R4 decreases. 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 high / low level state of the target detection signal output by the signal conditioning circuit is opposite to the high / low level state of the pulse signal PULSE.

[0068] Similarly, as shown in Figure 2, the signal conditioning circuit 2 includes a comparator U2 and a fifth resistor R5. The connection relationships of the signal conditioning circuit 2 are as follows: the inverting input terminal of comparator U2 is connected to the third terminal of the first-stage acquisition circuit; the non-inverting input terminal of comparator U2 is connected to the third terminal of the second-stage acquisition circuit; the output terminal of comparator U2 serves as the output terminal of the signal conditioning circuit 2 and is connected to the input terminal of the signal detection circuit 3; both the non-inverting and inverting input terminals of comparator U2 serve as the input terminals of the signal conditioning circuit 2; the first terminal of the fifth resistor R5 is connected to the non-inverting input terminal of comparator U2 and the third terminal of the second-stage acquisition circuit; the second terminal of the fifth resistor R5 is connected to the output terminal of comparator U2 and the input terminal of the signal detection circuit 3.

[0069] In some embodiments, under dry conditions, the signal input to the non-inverting input of comparator U2 is approximately the pulse signal PULSE, and its voltage is close to the voltage corresponding to the pulse signal PULSE. Under water immersion conditions, the resistance of the fourth resistor R4 will decrease, and the voltage input to the non-inverting input of comparator U2 will be 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 comparator U2 is the reverse of the voltage of the pulse signal PULSE (or it can be understood that the high and low level states of the target detection signal output by comparator U2 are opposite to the high and low level states of the pulse signal PULSE).

[0070] Because of the uncertainty of the degree of water immersion, the comparator U2 may oscillate back and forth near the discrimination threshold. Therefore, a fifth resistor R5 is added to the signal conditioning circuit 2 as a hysteresis adjustment resistor. Since the comparator U2 has a certain voltage hysteresis characteristic after flipping, the current circuit will not output oscillation due to the small fluctuation of the fourth resistor R4 caused by water immersion.

[0071] The signal detection circuit 3 includes an XOR gate U3 and a first capacitor C1. The connection relationships of the signal detection circuit 3 are as follows: the first input terminal of the XOR gate U3 serves as the input terminal of the signal detection circuit 3 and is connected to the second terminal of the fifth resistor R5 and the output terminal of the comparator U2; the second input terminal of the XOR gate U3 is connected to 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 U1; the output terminal of the XOR gate U3 serves as the output terminal of the signal detection circuit 3; the first terminal of the first capacitor C1 is connected to the output terminal of the XOR gate U3; and the second terminal of the first capacitor C1 is grounded.

[0072] In some embodiments, the XOR gate U3 is configured to determine whether the high / low level state of the target detection signal output by the comparator U2 is the same as or opposite to the high / low level state of the pulse signal PULSE. If they are the same, a high level is output, indicating no water immersion (no leakage); otherwise, a low level is output, indicating water immersion (leakage). The first capacitor C1 prevents glitches in the output of the XOR gate U3 due to timing issues, as it filters out these glitches and avoids malfunctions in subsequent circuits.

[0073] In addition, Figure 2 also includes five detection points, namely P1, P2, P3, P4 and P5.

[0074] In some embodiments, when there is no water leakage (i.e. no water immersion) and the signal at P1 is high, the signal at P2 is high, the signal at P3 is high, the signal at P4 is low, and the signal at P5 is high.

[0075] When there is no water leakage (i.e. no water immersion) and the signal at P1 is low, the signal at P2 is low, the signal at P3 is low, the signal at P4 is high, and the signal at P5 is high.

[0076] When the system is in a leaking state (i.e., water immersion) and the signal at P1 is high, the signal at P2 is low, the signal at P3 is low, the signal at P4 is low, and the signal at P5 is low.

[0077] When the system is in a leaking state (i.e., flooded), and the signal at P1 is low, the signal at P2 is high, the signal at P3 is high, the signal at P4 is high, and the signal at P5 is low.

[0078] This disclosed embodiment is only one possible implementation method, but it is not limited to this only implementation method. Users can set it themselves according to their needs.

[0079] This disclosure 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 and configured to acquire pulse signals transmitted by the pulse signal transmitting terminal. The control terminal of the signal acquisition circuit is configured to acquire environmental signals. The input terminal of the signal conditioning circuit is connected to the output terminal of the signal acquisition circuit and configured to acquire environmental signals and pulse signals, and output 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 and configured to determine the water leakage state based on the target detection signal. Therefore, in the water leakage detection circuit provided in this disclosure, the signal acquisition circuit is configured to acquire 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 disclosure has a relatively simple structure, small size, is easy to install in a display screen, and has low cost.

[0080] On the other hand, this disclosure also provides a display screen 5, which includes the above-mentioned water leakage detection circuit and a light board 6 provided with light-emitting pixels. The number of light boards 6 can be set according to the size of the display screen, as shown in FIG3.

[0081] The schematic diagram of the lamp board 6 is shown in Figure 4. The lamp board has a first conductive line (which can be understood as the positive terminal + of the circuit) and a second conductive line (which can be understood as the negative terminal - of the circuit). The first and second conductive lines are arranged in parallel to form the control terminal of the signal acquisition circuit. At least one first extension segment is provided extending from the first conductive line toward the second conductive line, and at least one second extension segment is provided extending from the second conductive line toward the first conductive line. The first and second extension segments are spaced apart. Along the extension direction of the first and second conductive lines, the projections of the first and second extension segments at least partially overlap.

[0082] Optionally, the lamp board 6 can be understood as a variable-value resistor. Its resistance needs to change depending on whether it is in a leaking or dry state, thus causing a change in the overall circuit output and determining the current state of the display screen. To make the effect more obvious, the lamp board 6 is designed to have high environmental detection sensitivity, ensuring that its resistance decreases as much as possible (a significant change in resistance value) after immersion in water, thereby making the output change more noticeable. Therefore, the design scheme shown in Figure 4 is adopted.

[0083] To avoid ionization of the water seepage area caused by the DC signal, which would lead to unstable resistance values ​​corresponding to lamp board 6, a pulse signal with alternating polarity reversal is applied to its first and second conductive lines.

[0084] The embodiments of the display screen provided in this disclosure are the same as those of the above-described water leakage detection circuit, therefore, the embodiments of this disclosure will not be described in detail here, and the display screen provided in this disclosure has the same beneficial effects as the above-described water leakage detection circuit.

[0085] The foregoing has provided a detailed description of a water leakage detection circuit and display screen provided by the embodiments of this disclosure. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. For those skilled in the art, several improvements and modifications can be made to the embodiments of this disclosure without departing from the scope of this disclosure, and these improvements and modifications also fall within the protection scope of the embodiments of this disclosure.

[0086] In this specification, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A leak detection circuit, comprising: Signal acquisition circuit, signal conditioning circuit, and signal detection circuit; The input terminal of the signal acquisition circuit is connected to the pulse signal transmitting terminal and is configured to acquire the pulse signal transmitted by the pulse signal transmitting terminal. The control terminal of the signal acquisition circuit is configured to acquire environmental signals; The input terminal of the signal conditioning circuit is connected to the output terminal of the signal acquisition circuit, configured to acquire the environmental signal and the pulse signal, and output a corresponding target detection signal based on the environmental signal and the pulse signal; and The input terminal of the signal detection circuit is connected to the output terminal of the signal conditioning circuit, and is configured to determine the leakage status based on the target detection signal.

2. The leakage detection circuit according to claim 1 further includes: Inverter; Wherein, the input terminal of the inverter is connected to the pulse signal transmitting terminal and the first terminal of the signal acquisition circuit, and the first terminal of the signal acquisition circuit serves as the input terminal of the signal acquisition circuit; and The output terminal of the inverter is connected to the second terminal of the signal acquisition circuit.

3. The leakage detection circuit according to claim 2, wherein, The signal acquisition circuit includes: a first-stage acquisition circuit and a second-stage acquisition circuit; Wherein, the first terminal of the first-stage acquisition circuit is connected to the first terminal of the second-stage acquisition circuit, and together they serve as the first terminal of the signal acquisition circuit, which is connected to the input terminal of the inverter and the pulse signal transmitting terminal; The second terminal of the first-stage acquisition circuit is connected to the second terminal of the second-stage acquisition circuit, and together they serve as the second terminal of the signal acquisition circuit connected to the output terminal of the inverter; and The third terminal of the first-stage acquisition circuit and the third terminal of the second-stage acquisition circuit are combined to serve as the output terminal of the signal acquisition circuit and connected to the input terminal of the signal conditioning circuit.

4. The leakage detection circuit according to claim 3, wherein, The first-stage acquisition circuit includes: a first resistor and a second resistor; The first end of the first resistor is connected as the first end of the first-stage acquisition circuit to the input end of the inverter, the pulse signal transmitting end, and the first end of the second-stage acquisition circuit. The second end of the first resistor is connected to the first end of the second resistor, and together they serve as the third end of the first-stage acquisition circuit, connected to the input end of the signal conditioning circuit; and The second end of the second resistor is connected to the second end of the first-stage acquisition circuit and the output end of the inverter.

5. The leakage detection circuit according to claim 3 or 4, wherein, The second-stage acquisition circuit includes: a third resistor and a fourth resistor; The first end of the third resistor serves as the first end of the second-stage acquisition circuit and is connected to the input end of the inverter, the pulse signal transmitting end, and the first end of the first-stage acquisition circuit. The second end of the third resistor is connected to the first end of the fourth resistor, and together they serve as the third end of the second-stage acquisition circuit, connected to the input end of the signal conditioning circuit; and The second end of the fourth resistor serves as the second end of the second-stage acquisition circuit, and is connected to the second end of the first-stage acquisition circuit and the output end of the inverter.

6. The leakage detection circuit according to any one of claims 3-5, wherein, The signal conditioning circuit includes a comparator; The inverting input terminal of the comparator is connected to the third terminal of the first-stage acquisition circuit. The non-inverting input of the comparator is connected to the third terminal of the second-stage acquisition circuit; The output of the comparator is connected to the input of the signal detection circuit as the output of the signal conditioning circuit; and The non-inverting input and the inverting input of the comparator together serve as the input of the signal conditioning circuit.

7. The leakage detection circuit according to claim 6, wherein, The signal conditioning circuit further includes: a fifth resistor; The first terminal of the fifth resistor is connected to the non-inverting input terminal of the comparator and the third terminal of the second-stage acquisition circuit; and The second end of the fifth resistor is connected to the output of the comparator and the input of the signal detection circuit.

8. The leakage detection circuit according to claim 7, wherein, The signal detection circuit includes an XOR gate; The first input terminal of the XOR gate is connected to the second terminal of the fifth resistor and the output terminal of the comparator, serving as the input terminal of the signal detection circuit. The second input terminal of the XOR gate is connected to 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; and The output of the XOR gate serves as the output of the signal detection circuit.

9. A display screen, comprising the water leakage detection circuit according to any one of claims 1-8, and further comprising a lamp board provided with light-emitting pixels; The lamp board is provided with a first conductive line and a second conductive line, which are arranged in parallel to form the control terminal of the signal acquisition circuit.

10. The display screen according to claim 9, wherein, The first conductive line extends toward the second conductive line and is provided with at least one first extension segment, and the second conductive line extends toward the first conductive line and is provided with at least one second extension segment, with the first extension segment and the second extension segment being spaced apart. Furthermore, along the extending directions of the first conductive line and the second conductive line, the projections of the first extension segment and the second extension segment at least partially overlap.

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