Detection circuit for LED driving fault

Abstract

The utility model belongs to the technical field of illumination detection equipment, and particularly relates to a detection circuit for LED driving faults, which comprises a microprocessor, an LED driving module and a plurality of sampling modules. The LED driving module is suitable for feeding back the state information of each LED module to the microprocessor; each sampling module is suitable for respectively collecting sampling information between the corresponding LED module and the LED driving module and sending the sampling information to the microprocessor; according to the utility model, the sampling module is additionally arranged between the LED driving module and the LED modules, so that the state between the LED driving module and each LED module can be accurately judged when the microprocessor and the LED driving module send out a control instruction to extinguish the LED modules, and the requirement of high-precision detection of LED driving faults is met; and the problem that the LED module cannot be detected when the LED module is dark when the LED driving module executes the extinguishing of the LED module is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lighting detection equipment, and particularly relates to a detection circuit for LED drive faults. Background Art

[0002] During the process of controlling LEDs by existing drive chips, fault information of the ports of the recognized drive chips can be fed back through communication. However, only when the drive chip controls the corresponding port to light up the LED, that is, when the drive chip outputs current externally, can the open - short state of the port be recognized. When the port on the drive chip is set to turn off the LED, that is, when the drive chip has no output current externally, the port fault state will not be recognized.

[0003] However, in the actual production process, due to reasons such as static electricity and interference, the output ports of the drive chips may fail. For example, when the drive chip can normally light up the LED and there is a situation where the LED is dimly lit when the LED is turned off. At this time, because the instruction obtained by the drive chip is to turn off the LED, the drive chip no longer detects faults, and there is a situation where faults cannot be recognized.

[0004] Therefore, it is urgent to develop a new detection circuit for LED drive faults to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a detection circuit for LED drive faults.

[0006] To solve the above - mentioned technical problems, the utility model provides a detection circuit for LED drive faults, which includes: a micro - processor, an LED drive module, and several sampling modules; wherein the LED drive module is electrically connected to the micro - processor, and each LED module is electrically connected to the LED drive module respectively; one end of each sampling module is electrically connected to the micro - processor, and the other end of each sampling module is respectively connected between the corresponding LED module and the LED drive module; the micro - processor is adapted to send corresponding control signals to the LED drive module to drive the corresponding LED module to light up or go out; the LED drive module is adapted to feed back the state information of each LED module to the micro - processor; and each sampling module is adapted to respectively collect the sampling information between the corresponding LED module and the LED drive module and send it to the micro - processor.

[0007] Specifically, the LED drive module includes: a drive chip; each port on the drive chip is respectively connected to the LED drive module and each sampling module.

[0008] Specifically, the drive chip adopts a TLD7002 drive chip.

[0009] Specifically, the sampling module includes: an ADC sampling circuit; one end of the ADC sampling circuit is connected to the microprocessor, and the other end of the ADC sampling circuit is connected between the LED module and the LED driving module; the ADC sampling circuit collects the sampling information between the corresponding LED module and the LED driving module to send it to the microprocessor.

[0010] Specifically, the sampling information includes: voltage information.

[0011] On the other hand, the present invention provides an illumination system, which includes: a detection circuit for LED driving faults and several LED modules; each of the LED modules is electrically connected to the LED driving module in the detection circuit respectively.

[0012] Specifically, the detection circuit includes: a microprocessor, an LED driving module and several sampling modules; the LED driving module is electrically connected to the microprocessor, and each LED module is electrically connected to the LED driving module respectively; one end of each of the sampling modules is electrically connected to the microprocessor, and the other end of each of the sampling modules is respectively connected between the corresponding LED module and the LED driving module; the microprocessor is adapted to send corresponding control signals to the LED driving module to drive the corresponding LED module to light or extinguish; the LED driving module is adapted to feedback the state information of each LED module to the microprocessor; and each of the sampling modules is adapted to respectively collect the sampling information between the corresponding LED module and the LED driving module to send it to the microprocessor.

[0013] Specifically, the LED module includes: an LED lamp; the LED lamp and the LED driving module; the LED lamp is adapted to be lit or extinguished under the drive of the LED driving module.

[0014] Specifically, the illumination system further includes: a power supply module; the power supply module supplies power to the microprocessor, the LED driving module and each LED module.

[0015] The beneficial effect of the present invention is that by adding a sampling module between the LED driving module and the LED module, the present invention can accurately judge the state between the LED driving module and each LED module when the microprocessor and the LED driving module issue a control instruction to extinguish the LED module, meet the requirement of high-precision detection of LED driving faults, and overcome the problem that the LED module appears dark and bright and cannot be detected when the LED driving module executes the extinguishing of the LED module.

[0016] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention.

[0017] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following specifically presents preferred embodiments and, in conjunction with the accompanying drawings, provides detailed descriptions as follows. Description of the Drawings

[0018] To more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic block diagram of the detection circuit for LED drive faults of the present utility model. Specific Embodiments

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions of the present utility model in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0021] Embodiment 1. In this embodiment, as Figure 1 shown, this embodiment provides a detection circuit for LED drive faults, which includes: a microprocessor, an LED drive module, and several sampling modules; wherein the LED drive module is electrically connected to the microprocessor, and each LED module is electrically connected to the LED drive module respectively; one end of each of the sampling modules is electrically connected to the microprocessor, and the other end of each of the sampling modules is respectively connected between the corresponding LED module and the LED drive module; the microprocessor is adapted to send corresponding control signals to the LED drive module to drive the corresponding LED module to light or extinguish; the LED drive module is adapted to feedback the status information of each LED module to the microprocessor; and each of the sampling modules is adapted to respectively collect the sampling information between the corresponding LED module and the LED drive module to send to the microprocessor.

[0022] In this embodiment, by adding sampling modules between the LED drive module and the LED module, it can accurately judge the status between the LED drive module and each LED module when the microprocessor and the LED drive module issue a control instruction to turn off the LED module, meeting the requirement of high-precision detection of LED drive faults and overcoming the problem that the LED module appears dim or bright and cannot be detected when the LED drive module executes the extinguishing of the LED module.

[0023] In at least one embodiment, the LED driving module includes: a driving chip; each port on the driving chip is respectively connected to the LED driving module and each sampling module.

[0024] Specifically, through the communication connection with the driving chip, the microprocessor can obtain the fault information of the driving chip when lighting the LED module.

[0025] Specifically, the function of the driving chip is to execute the control instructions issued by the microprocessor, and at the same time, the driving chip itself can also feedback the execution status of each port.

[0026] In at least one embodiment, the driving chip adopts a TLD7002 driving chip.

[0027] In at least one embodiment, the sampling module includes: an ADC sampling circuit; one end of the ADC sampling circuit is connected to the microprocessor, and the other end of the ADC sampling circuit is connected between the LED module and the LED driving module; the ADC sampling circuit collects the sampling information corresponding to between the LED module and the LED driving module to send to the microprocessor.

[0028] Specifically, the ADC sampling circuit samples the output port voltage of the driving chip and connects it to the microprocessor to realize the AD sampling of the driving chip port by the microprocessor. When the driving chip controls to turn off the LED module, if the sampling value of the ADC sampling circuit exceeds the normal range, it is determined that there is a fault.

[0029] In at least one embodiment, the sampling information includes: voltage information.

[0030] Specifically, when the driving chip controls the LED module to turn off and the LED module flickers, at this time, the voltage of the corresponding control port of the driving chip is significantly lower than that of the other normal ports and has reproducibility. Utilizing the characteristics of driving chip fault detection and the stable and reproducible fault characteristics when the LED module flickers, the ADC sampling circuit samples the port voltage of the driving chip, and judges whether there is an abnormal situation by the value of the voltage information when the control instruction is to turn off the LED module.

[0031] Embodiment 2, on the basis of Embodiment 1, this embodiment provides an illumination system, which includes: a detection circuit for LED driving faults and several LED modules; wherein each of the LED modules is electrically connected to the LED driving module in the detection circuit respectively.

[0032] In at least one embodiment, the detection circuit includes: a microprocessor, an LED driving module, and a plurality of sampling modules; the LED driving module is electrically connected to the microprocessor, and each LED module is electrically connected to the LED driving module respectively; one end of each of the sampling modules is electrically connected to the microprocessor, and the other end of each of the sampling modules is respectively connected between the corresponding LED module and the LED driving module; the microprocessor is adapted to send corresponding control signals to the LED driving module to drive the corresponding LED module to be lit or extinguished; the LED driving module is adapted to feedback the status information of each LED module to the microprocessor; and each of the sampling modules is adapted to respectively collect the sampling information between the corresponding LED module and the LED driving module and send it to the microprocessor.

[0033] In at least one embodiment, the LED module includes: an LED lamp; the LED lamp and the LED driving module; the LED lamp is adapted to be lit or extinguished under the drive of the LED driving module.

[0034] In at least one embodiment, the lighting system further includes: a power supply module; the power supply module supplies power to the microprocessor, the LED driving module, and each LED module.

[0035] Specifically, the power supply module supplies power to the entire lighting system.

[0036] In summary, by adding a sampling module between the LED driving module and the LED module in the present utility model, it is possible to accurately judge the status between the LED driving module and each LED module when the microprocessor and the LED driving module issue a control instruction to turn off the LED module, meet the requirement of high-precision detection of LED driving faults, and overcome the problem that the LED module cannot be detected when the LED driving module executes the turn-off of the LED module but the LED module shows dim or bright.

[0037] Each device (components without specific structures described) selected in this application is a general standard component or a component known to those skilled in the art, and its structure and principle can be known by those skilled in the art through technical manuals or obtained through conventional experimental methods. Moreover, the software programs involved in this application are all prior arts, and this application does not involve any improvement to the software programs.

[0038] In the description of the embodiments of the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0039] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0040] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some communication interfaces. The indirect coupling or communication connection of the devices or units can be in electrical, mechanical, or other forms.

[0041] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0042] In addition, in each embodiment of the present utility model, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0043] Taking the above-mentioned ideal embodiments of the present utility model as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A detection circuit for LED drive faults, characterized in that, Comprising: A microprocessor, an LED driving module and a plurality of sampling modules; Wherein The LED driving module is electrically connected to the microprocessor, and each LED module is electrically connected to the LED driving module respectively; One end of each of the sampling modules is electrically connected to the microprocessor, and the other end of each of the sampling modules is respectively connected between the corresponding LED module and the LED driving module; The microprocessor is adapted to send corresponding control signals to the LED driving module to drive the corresponding LED module to light up or go out; The LED driving module is adapted to feedback the status information of each LED module to the microprocessor; And Each of the sampling modules is adapted to respectively collect the sampling information between the corresponding LED module and the LED driving module to send to the microprocessor.

2. The detection circuit for LED driving faults according to claim 1, wherein The LED driving module comprises: a driving chip; Each port on the driving chip is respectively connected to the LED driving module and each sampling module.

3. The detection circuit for LED driving faults according to claim 2, wherein The driving chip adopts a TLD7002 driving chip.

4. The detection circuit for LED driving faults according to claim 1, wherein The sampling module comprises: an ADC sampling circuit; One end of the ADC sampling circuit is connected to the microprocessor, and the other end of the ADC sampling circuit is connected between the LED module and the LED driving module; The ADC sampling circuit collects the sampling information between the corresponding LED module and the LED driving module to send to the microprocessor.

5. The detection circuit for LED driving faults according to claim 4, wherein The sampling information comprises: voltage information.

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