LED anomaly detection system and vehicle
By simplifying the design of the LED fault detection system and combining the switching circuit and the main control circuit, low-cost LED fault detection is achieved, solving the problem of high cost in existing technologies and improving detection efficiency and reliability.
Patent Information
- Application Number
- CN202520016425.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-03
AI Technical Summary
The existing vehicle LED fault detection circuits are too expensive, leading to increased production and maintenance costs, which hinders market adoption and consumer acceptance.
The design employs a combination of switching circuits, switching control circuits, main control circuits, detection circuits, and LED circuits. By using logical judgments of detection and control signals, the circuit structure is simplified and costs are reduced.
This simplifies the integrated circuit structure, reduces circuit size and cost, and improves the efficiency and reliability of fault detection.
Smart Images
Figure CN223827775U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to integrated circuit technical field especially relates to a LED abnormity detection system and vehicle. BACKGROUND
[0002] With the progress of vehicle industry, LED lighting technology has become an important part of vehicle lighting system. LED lamps and lanterns with its low energy consumption, long life, fast response speed and design flexibility, etc. have been widely used in vehicle headlamps, tail lamps, daytime running lamps and other components. However, LED lamps and lanterns may fail during use, such as lamp bead damage, circuit failure or performance degradation, etc. These failures will affect the lighting effect and driving safety of the vehicle.
[0003] At present, although there are various vehicle LED fault detection circuits on the market, they generally use complex electronic components and designs, resulting in high production cost. These high-cost designs not only increase the manufacturing cost of vehicles, but also increase the repair and replacement cost, which is not conducive to the popularization of the market and the acceptance of consumers. SUMMARY
[0004] The utility model embodiment provides a LED abnormity detection system and vehicle to solve the problem of high cost of existing LED fault detection circuit.
[0005] A LED abnormity detection system, comprising a switching circuit, a switch control circuit, a main control circuit, at least two detection circuits and at least two LED circuits;
[0006] Each of the detection circuits is connected to an LED circuit and is used to detect the LED circuit and output a detection signal;
[0007] The switch control circuit is connected to at least two detection circuits and is used to output a first control signal when any one of the detection circuits outputs a working abnormal signal;
[0008] The switching circuit is connected to the switch control circuit and is used to conduct according to the first control signal;
[0009] The main control circuit is connected to the switching circuit and is used to determine the abnormal LED circuit among the at least two LED circuits when the switching circuit is turned on.
[0010] Further, the switch control circuit comprises an AND gate circuit;
[0011] The input end of the AND gate circuit is connected to at least two detection circuits, and the output end of the AND gate circuit is connected to the control end of the switching circuit.
[0012] Further, the switch circuit comprises a first transistor;
[0013] A first end of the first transistor is connected with the master control circuit, a second end of the first transistor is grounded, and a third end of the first transistor is connected with the switch control circuit.
[0014] Further, the first transistor is a bipolar transistor.
[0015] A collector of the first transistor is connected with the master control circuit, an emitter of the first transistor is grounded, and a base of the first transistor is connected with the switch control circuit.
[0016] Further, a first end of each of the LED circuits is configured to receive a power supply signal, a second end of each of the LED circuits is grounded, and a signal detection end of each of the LED circuits is connected with a detection circuit.
[0017] Further, each of the LED circuits comprises a light emitting diode circuit and a resistor circuit connected in series between the first power supply end and the ground.
[0018] A connection node between the light emitting diode circuit and the resistor circuit is connected with a detection circuit.
[0019] Further, the master control circuit comprises an MCU, and a signal acquisition end of the MCU is connected with the switch circuit.
[0020] Further, the master control circuit further comprises a power supply circuit.
[0021] An output end of the power supply circuit is connected with the first end of each of the LED circuits, and is configured to output the power supply signal.
[0022] Further, the power supply circuit comprises a BUCK circuit.
[0023] A vehicle comprising the LED abnormality detection system.
[0024] The LED abnormality detection system and the vehicle, the LED abnormality detection system comprises a switching circuit, a switching control circuit, a main control circuit, at least two detection circuits and at least two LED circuits; each detection circuit is connected with an LED circuit, and is used for detecting the LED circuit and outputting a detection signal; the switching control circuit is connected with the at least two detection circuits, and is used for outputting a first control signal when the detection signal output by any one detection circuit is an operating abnormality signal; the switching circuit is connected with the switching control circuit, and is used for being turned on according to the first control signal; the main control circuit is connected with the switching circuit, and is used for determining an abnormal LED circuit in the at least two LED circuits when the switching circuit is turned on, so that the main control circuit can determine the abnormal LED circuit in the plurality of LED circuits by judging the turn-on state of the switching circuit, the circuit structure is simple, the integrated circuit size is reduced, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of the drawings.
[0026] Figure 1 It is a circuit schematic diagram of the LED abnormality detection system in an embodiment of the present application.
[0027] In the figure: 1, LED abnormality detection system; 11, switching circuit; 12, switching control circuit; 13, main control circuit; 131, MCU; 132, power supply circuit; 14, plurality of detection circuits; 2, at least two LED circuits; 21, light emitting diode circuit; 22, resistor circuit. DETAILED DESCRIPTION
[0028] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0029] It should be understood that the present application can be implemented in different forms, and should not be interpreted as being limited to the embodiments presented here. On the contrary, the presentation of these embodiments will make the disclosure complete and complete, and will fully convey the scope of the present application to those skilled in the art. In the drawings, in order to be clear, the size and relative size of the layers and regions may be exaggerated throughout the same reference signs represent the same elements.
[0030] It will be understood that when an element or layer is referred to as being "on", "adjacent", "connected" or "coupled" to another element or layer, it can be directly on, adjacent, connected or coupled to the other element or layer or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on", "directly adjacent", "directly connected", or "directly coupled" to another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.
[0031] Spatially relative terms, such as "beneath", "below", "lower", "under", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
[0032] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0033] For a thorough understanding of the present application, reference should be made to the following detailed description, in conjunction with the accompanying drawings, in which:
[0034] This embodiment provides an LED anomaly detection system 1, which can be applied in vehicles. This embodiment provides an LED anomaly detection system 1, such as... Figure 1 As shown, it includes a switch circuit 11, a switch control circuit 12, a main control circuit 13, at least two detection circuits 14, and at least two LED circuits 2. Each detection circuit is connected to an LED circuit and is used to detect the LED circuit and output a detection signal. The switch control circuit 12 is connected to at least two detection circuits 14 and is used to output a first control signal when any detection circuit outputs a detection signal that is an abnormal working signal. The switch circuit 11 is connected to the switch control circuit 12 and is used to turn on according to the first control signal. The main control circuit 13 is connected to the switch circuit 11 and is used to determine that there is an abnormal LED circuit in at least two LED circuits 2 when the switch circuit 11 is turned on.
[0035] For example, each of the at least two LED circuits 2 is used to implement different lighting functions of the vehicle, such as headlights, taillights, and daytime running lights.
[0036] As an example, this detection circuit is used to detect the operating status of an LED circuit. Exemplarily, each detection circuit is connected to an LED circuit, used to detect the LED circuit, and outputs a detection signal. This detection signal includes detecting whether the LED circuit is on or off, whether the LED circuit is damaged, and whether the LED circuit is short-circuited or open-circuited. Exemplarily, the normal operation of the LED circuit can be determined by detecting the voltage across its terminals, or by detecting the current flowing through it, or by measuring its equivalent resistance. It should be noted that the specific circuit implementation of this detection circuit can employ techniques known to those skilled in the art, and will not be elaborated upon here.
[0037] For example, the detection signal includes a high-level signal or a low-level signal. When the detection circuit detects that the connected LED circuit is working normally, it outputs a high-level signal, i.e., a normal operation signal. When the detection circuit detects that the connected LED circuit is malfunctioning, it outputs a low-level signal, i.e., a malfunction signal.
[0038] As an example, the switch control circuit 12 is connected to at least two detection circuits 14 and is used to output a first control signal when any one of the detection circuits outputs a detection signal indicating an abnormal operation. For example, when any one of the detection circuits outputs a low-level detection signal, the switch control circuit 12 outputs the first control signal, which controls the switch circuit 11 to turn on. It should be noted that when all the detection circuits output normal operating signals, the switch control circuit 12 outputs a second control signal, which controls the switch circuit 11 to turn off.
[0039] As an example, a switch circuit 11, connected to a switch control circuit 12, is used to turn on according to a first control signal; a main control circuit 13, connected to the switch circuit 11, is used to determine whether there is an abnormal LED circuit among the multiple LED circuits when the switch circuit 11 is turned on. Exemplarily, when the switch circuit 11 is turned on, the main control circuit 13 detects the operating state of the switch circuit 11, i.e., whether it is turned on or off, and can determine whether there is an abnormal LED circuit among the multiple LED circuits.
[0040] In this embodiment, the LED anomaly detection system 1 includes a switching circuit 11, a switching control circuit 12, a main control circuit 13, at least two detection circuits 14, and at least two LED circuits 2. Each detection circuit is connected to an LED circuit to detect the LED circuit and output a detection signal. The switching control circuit 12 is connected to the at least two detection circuits 14 to output a first control signal when any detection circuit outputs a detection signal indicating an abnormal operation. The switching circuit 11 is connected to the switching control circuit 12 to conduct according to the first control signal. The main control circuit 13 is connected to the switching circuit 11 to determine that there is an abnormal LED circuit among the at least two LED circuits 2 when the switching circuit 11 is conducting. Thus, the main control circuit 13 can determine the presence of an abnormal LED circuit among multiple LED circuits by judging the conduction state of the switching circuit 11. The circuit structure is simple, reducing the size of integrated circuits and lowering costs.
[0041] In one embodiment, the switch control circuit 12 includes an AND gate circuit; the input of the AND gate circuit is connected to at least two detection circuits 14, and the output of the AND gate circuit is connected to the control terminal of the switch circuit 11.
[0042] As an example, the input of an AND gate is connected to at least two detection circuits 14, and the output of the AND gate is connected to the control terminal of a switching circuit 11. When both detection circuits 14 output a high-level signal (normal operation signal), the AND gate outputs a low-level signal (second control signal) to disconnect the switching circuit 11. When any one of the detection circuits 14 outputs a low-level signal (abnormal operation signal), the AND gate outputs a high-level signal (first control signal) to turn on the switching circuit 11.
[0043] In this embodiment, by connecting the input terminal of the AND gate circuit to at least two detection circuits 14 and the output terminal of the AND gate circuit to the control terminal of the switch circuit 11, the circuit structure of the switch control circuit 12 is made simpler and the cost is reduced.
[0044] Understandably, the switch control circuit 12 can also be implemented using a microcontroller unit, but the cost is higher compared to using AND gate circuits.
[0045] In one embodiment, the switching circuit 11 includes a first transistor; the first terminal of the first transistor is connected to the main control circuit 13, the second terminal of the first transistor is grounded, and the third terminal of the first transistor is connected to the switching control circuit 12.
[0046] Understandably, the first terminal of the first transistor is also used to connect to a second power supply terminal, such as a 5V power supply terminal, for supplying power to the first transistor.
[0047] As an example, the first terminal of the first transistor is connected to the signal acquisition terminal of the main control circuit 13. When the first transistor is turned on, it pulls down the level of the signal acquisition terminal of the main control circuit 13, thereby enabling the main control circuit 13 to determine that there is an abnormal LED circuit among the multiple LED circuits.
[0048] In this embodiment, the switching circuit 11 uses a first transistor connected in series between the main control circuit 13 and ground, and connects the third terminal of the first transistor to the switching control circuit 12. This allows the main control circuit 13 to determine which LED circuits among multiple LED circuits are abnormal through a conduction signal. The structure is simple and the cost is low.
[0049] In one embodiment, the first transistor is a bipolar transistor; the collector of the first transistor is connected to the main control circuit 13, the emitter of the first transistor is grounded, and the base of the first transistor is connected to the switch control circuit 12.
[0050] Alternatively, the first transistor may also be an IGBT transistor or a field-effect transistor.
[0051] In this embodiment, in the scenario of LED detection, there is no situation of high voltage or high current, or high frequency switching. Therefore, the first transistor adopts a bipolar transistor, which can meet the requirements while having a relatively simple structure and low manufacturing cost.
[0052] In one embodiment, the first terminal of each LED circuit is used to receive a power supply signal, the second terminal of each LED circuit is grounded, and the signal detection terminal of each LED circuit is connected to a detection circuit.
[0053] In this embodiment, the first terminal of each LED circuit is used to receive a power supply signal, the second terminal of each LED circuit is grounded, and the signal detection terminal of each LED circuit is connected to a detection circuit. Thus, when any LED circuit malfunctions, the switch control circuit 12 outputs a first control signal to control the switch circuit 11 to conduct. This allows the main control circuit 13 to determine that there is an abnormal LED circuit among the multiple LED circuits when the switch circuit 11 is conducted. By judging the conduction state of the switch circuit 11, the main control circuit 13 can determine that there is an abnormal LED circuit among the multiple LED circuits. The circuit structure is simple, the integrated circuit size is reduced, and the cost is lowered.
[0054] In one embodiment, each LED circuit includes a light-emitting diode circuit 21 and a resistor circuit 22 connected in series between a first power supply terminal and ground; the connection node between the light-emitting diode circuit 21 and the resistor circuit 22 is connected to a detection circuit. Understandably, the connection node between the light-emitting diode circuit 21 and the resistor circuit 22 is the signal detection terminal of each LED circuit in the above embodiment.
[0055] As an example, the first power supply terminal is used to provide operating voltage to each LED circuit. Optionally, the first power supply terminal may be a power supply terminal provided by the main control circuit 13, or a power supply terminal provided by other power supply modules.
[0056] As an example, the LED circuit 21 may include one LED or multiple LEDs, which may be connected in series and / or in parallel. The resistor circuit 22 may include one resistor or multiple resistors, which may be connected in series and / or in parallel.
[0057] In this embodiment, each LED circuit includes a light-emitting diode circuit 21 and a resistor circuit 22 connected in series between the first power supply terminal and ground; thereby, power is supplied to multiple LED circuits through the first power supply terminal, reducing the number of power supply circuits 132, and thus reducing the number of components and costs. The connection node between the light-emitting diode circuit 21 and the resistor circuit 22 is connected to a detection circuit, so that the detection circuit can determine whether each LED circuit is abnormal by the current or voltage of the resistor circuit 22.
[0058] In one embodiment, the main control circuit 13 includes an MCU 131; the signal acquisition terminal of the MCU 131 is connected to the switching circuit 11.
[0059] In this embodiment, the main control circuit 13 includes an MCU 131; the signal acquisition terminal of the MCU 131 is connected to the switching circuit 11, so that the MCU 131 can realize the abnormal detection of multiple LED circuits through one port, reducing the number of ports occupied by the MCU 131.
[0060] In one embodiment, the main control circuit 13 further includes a power supply circuit 132; the output terminal of the power supply circuit 132 is connected to the first terminal of each LED circuit for outputting a power supply signal.
[0061] The power supply circuit 132 includes a constant current source circuit or a BUCK circuit.
[0062] In this embodiment, the output terminal of the power supply circuit 132 is connected to the first terminal of each LED circuit to output a power supply signal. A power supply circuit 132 can provide power supply signals to multiple LED circuits. Compared with setting an independent power supply circuit 132 for each LED circuit, the number of power supply circuits 132 can be reduced, thus reducing costs.
[0063] In one embodiment, the power supply circuit 132 includes a BUCK circuit.
[0064] In this embodiment, the power supply circuit 132 uses a BUCK circuit to provide a stable power supply signal to multiple LED circuits, and has a small size, which improves the integration of the main control circuit 13.
[0065] This embodiment provides a vehicle including the aforementioned LED anomaly detection system 1.
[0066] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.
Claims
1. An LED anomaly detection system, characterized in that, It includes a switching circuit, a switching control circuit, a main control circuit, at least two detection circuits, and at least two LED circuits; Each of the aforementioned detection circuits is connected to one of the aforementioned LED circuits and is used to detect the LED circuit and output a detection signal; The switch control circuit is connected to at least two of the detection circuits and is used to output a first control signal when any one of the detection circuits outputs a detection signal that is an abnormal working signal. The switching circuit is connected to the switching control circuit and is used to turn on according to the first control signal; The main control circuit is connected to the switching circuit and is used to determine that at least two of the LED circuits are abnormal when the switching circuit is turned on.
2. The LED anomaly detection system as described in claim 1, characterized in that, The switch control circuit includes an AND gate circuit; The input terminal of the AND gate is connected to at least two of the detection circuits, and the output terminal of the AND gate is connected to the control terminal of the switching circuit.
3. The LED anomaly detection system as described in claim 1, characterized in that, The switching circuit includes a first transistor; The first terminal of the first transistor is connected to the main control circuit, the second terminal of the first transistor is grounded, and the third terminal of the first transistor is connected to the switch control circuit.
4. The LED anomaly detection system as described in claim 3, characterized in that, The first transistor is a bipolar transistor; The collector of the first transistor is connected to the main control circuit, the emitter of the first transistor is grounded, and the base of the first transistor is connected to the switch control circuit.
5. The LED anomaly detection system as described in claim 1, characterized in that, The first terminal of each LED circuit is used to receive a power supply signal, the second terminal of each LED circuit is grounded, and the signal detection terminal of each LED circuit is connected to a detection circuit.
6. The LED anomaly detection system as described in claim 5, characterized in that, Each of the LED circuits includes a light-emitting diode circuit and a resistor circuit connected in series between the first power supply terminal and ground; The connection node between the LED circuit and the resistor circuit is connected to a detection circuit.
7. The LED anomaly detection system as described in claim 5, characterized in that, The main control circuit includes an MCU; the signal acquisition terminal of the MCU is connected to the switching circuit.
8. The LED anomaly detection system as described in claim 7, characterized in that, The main control circuit also includes a power supply circuit; The output terminal of the power supply circuit is connected to the first terminal of each of the LED circuits, and is used to output the power supply signal.
9. The LED anomaly detection system as described in claim 8, characterized in that, The power supply circuit includes a BUCK circuit.
10. A vehicle, characterized in that, Includes the LED anomaly detection system according to any one of claims 1 to 9.