Control circuit of lighting lamp and lighting equipment

Abstract

The embodiment of the utility model belongs to the technical field of circuits, and provides a control circuit of an illuminating lamp and illuminating equipment. The control circuit comprises an overvoltage indicating circuit which is electrically connected with any one of the plurality of LED branches. The overvoltage indication circuit comprises an indication assembly. The overvoltage indication circuit is configured to prompt an external error of current power supply connection through the indication assembly when the power supply voltage of an external power supply connected to the illuminating lamp is greater than a preset voltage. Therefore, a user can timely cut off an external power supply based on the prompt of the overvoltage indicating circuit, thereby realizing the protection of the illuminating lamp.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of circuit technology, and more specifically, to a control circuit of a lighting lamp and a lighting device. Background Art

[0002] In various scenes requiring lighting, a lighting panel may be formed according to a plurality of light-emitting diodes (LEDs), and lighting may be achieved by lighting the lighting panel.

[0003] Usually, in order to light up the lighting panel, a power supply can be connected through a current limiting resistor to realize power supply. That is, after connecting to the power supply, the power supply voltage supplies power to multiple LEDs in the lighting panel through the current limiting resistor, so that the LEDs light up and the lighting panel emits light.

[0004] However, if the power supply is connected incorrectly, for example, the power supply required by the lighting panel is 12V (volts), and a 24V power supply is connected by mistake, an overcurrent phenomenon will occur. If it is not cut off in time, the LED will be damaged. Utility Model Content

[0005] The embodiments of the present application provide a control circuit and a lighting device for a lighting lamp, which can be used to solve the problem of incorrect power connection, which may cause damage to the LED if not cut off in time.

[0006] In a first aspect, an embodiment of the present application provides a control circuit of a lighting lamp, wherein the lighting lamp comprises a plurality of LED branches, and the plurality of LED branches are connected in parallel; the control circuit comprises:

[0007] An overvoltage indication circuit is electrically connected to any one of the plurality of LED branches, the overvoltage indication circuit comprises an indication component, and the overvoltage indication circuit is configured as follows:

[0008] When the power supply voltage of the external power supply connected to the lighting lamp is greater than the preset voltage, the indication component prompts that the currently connected external power supply is wrong.

[0009] In this embodiment, the control circuit includes an overvoltage indication circuit, which is electrically connected to any one of the multiple LED branches. The overvoltage indication circuit includes an indication component. The overvoltage indication circuit is configured to indicate an external error of the current power supply connection through the indication component when the power supply voltage of the external power supply connected to the illuminating lamp is greater than a preset voltage. This allows the user to cut off the external power supply in time based on the prompt of the overvoltage indication circuit, thereby protecting the illuminating lamp.

[0010] In some embodiments of the present application, the overvoltage indication circuit further includes: a first diode, a second diode, a field effect transistor MOS, a first resistor and a second resistor;

[0011] Among them, the positive electrode of the first diode is electrically connected to the gate of the MOS, and the negative electrode of the first diode is electrically connected to the positive electrode of the second diode through a first electrical connection line; the first end of the first resistor is electrically connected to the first end of the second resistor through a second electrical connection line, and the second end of the first resistor is electrically connected to the first end of the indication component; the negative electrode of the second diode is electrically connected to the second electrical connection line; the second end of the indication component is electrically connected to the drain of the MOS; the second end of the second resistor is electrically connected to the target LED branch through a third electrical connection line; the first electrical connection line and the third electrical connection line are electrically connected through a fourth electrical connection line; the source of the MOS is grounded; the positive electrode of the external power supply is electrically connected to the first end of the second resistor; wherein the target LED branch is any one of the multiple LED branches.

[0012] In this embodiment, the overvoltage indication circuit is used to provide a prompt when a wrong external power source is connected.

[0013] In some embodiments of the present application, the indication component includes an LED indicator light;

[0014] When the power supply voltage of the external power supply connected to the lighting lamp is greater than the preset voltage, the LED indicator light is turned on.

[0015] In this embodiment, the indicating component may be an LED indicator light, which may be lit when the power supply voltage of the external power supply connected to the lighting lamp is greater than a preset voltage, so as to intuitively indicate power supply connection abnormality.

[0016] In some embodiments of the present application, the MOS is NMOS.

[0017] In this embodiment, using NMOS can reduce the on-resistance and reduce power consumption.

[0018] In some embodiments of the present application, for any one LED branch among a plurality of LED branches, the LED branch includes a current limiting resistor and an LED component connected in series therewith.

[0019] In this embodiment, a current limiting resistor is provided on each LED branch circuit, so as to protect the LED components on the branch circuit.

[0020] In some embodiments of the present application, the LED component includes an LED.

[0021] In this embodiment, the LED assembly may be composed of one LED to form a lighting lamp with lower brightness.

[0022] In some embodiments of the present application, if the LED component includes a plurality of LEDs, the plurality of LEDs are connected in series.

[0023] In this embodiment, the LED assembly may be composed of a plurality of LEDs to form a lighting lamp with higher brightness.

[0024] In some embodiments of the present application, the first diode is a voltage regulator diode.

[0025] In this embodiment, the influence of overvoltage and supervoltage can be reduced by the voltage stabilizing diode, so that the circuit operation is more stable and reliable.

[0026] In some embodiments of the present application, the second diode is a zener diode.

[0027] In this embodiment, the influence of overvoltage and supervoltage can be reduced by the voltage stabilizing diode, so that the circuit operation is more stable and reliable.

[0028] In a second aspect, the present application provides a lighting device, comprising:

[0029] lighting;

[0030] A control circuit as described in any one of the first aspects.

[0031] The lighting device provided in the embodiment of the present application includes the control circuit as described in any one of the above items, so the lighting device has the technical effects of the control circuit as described in any one of the above items, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0033] Figure 1 A schematic diagram of a lighting panel in the related art is shown as an example;

[0034] Figure 2 A schematic diagram of the structure of a control circuit of a lighting lamp provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of the circuit structure of an overvoltage indication circuit 101 provided in an embodiment of the present application;

[0036] Figure 4 A schematic diagram of an NMOS as an example of this application;

[0037] Figure 5A schematic diagram of the structure of another control circuit of a lighting lamp provided in an embodiment of the present application;

[0038] Figure 6 A schematic diagram of the circuit structure of another overvoltage indication circuit 101 provided in an embodiment of the present application;

[0039] Figure 7 A schematic diagram of the structure of a control circuit of another lighting lamp provided in an embodiment of the present application;

[0040] Figure 8 A circuit structure diagram of another overvoltage indication circuit 101 provided in an embodiment of the present application;

[0041] Fig. 9 A circuit structure diagram of another overvoltage indication circuit 101 provided in an embodiment of the present application;

[0042] Fig.10 A schematic diagram of the structure of a lighting device provided in an embodiment of the present application.

[0043] Description of reference numerals:

[0044] 10- control circuit;

[0045] 101-overvoltage indication circuit;

[0046] 1011-indicator component;

[0047] D1-first diode;

[0048] D2-second diode;

[0049] R1-first resistor;

[0050] R2-second resistor;

[0051] R3-current limiting resistor;

[0052] 110-LED assembly;

[0053] 12-LED indicator light;

[0054] 13- Warning device;

[0055] 20- Lighting equipment;

[0056] 201-Lighting;

[0057] 2011-LED branch. DETAILED DESCRIPTION

[0058] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0059] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0060] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0061] By forming a lighting panel based on a plurality of LEDs, for example, Figure 1 A schematic diagram of a lighting panel in the related art is shown as an example. Figure 1 As shown, the power supply VCC provides current to LED1, LED2, ..., LEDn through current limiting resistor 1, current limiting resistor 2, ..., current limiting resistor n, respectively, so that LED1, LED2, ..., LEDn are lit, wherein n is an integer greater than 2.

[0062] Specifically, the current limiting resistor 1 is a current limiting resistor on the branch corresponding to the LED 1 .

[0063] The current limiting resistor 2 is a current limiting resistor on the branch corresponding to LED 2.

[0064] The current limiting resistor n is the current limiting resistor on the branch corresponding to LEDn.

[0065] The power supply VCC provides current to the LED through the current limiting resistor, the LED lights up, and the lighting board emits light.

[0066] However, since there is no overvoltage protection, for example, the power supply required by the lighting panel is 12V, and if it is mistakenly connected to a 24V power supply, overcurrent will occur. If it is not cut off in time, the LED will be damaged.

[0067] Therefore, the present application provides a control circuit for a lighting lamp, which prompts the user to cut off the external power supply in time when the wrong external power supply is connected through the overvoltage indication circuit, thereby protecting the lighting lamp.

[0068] It can be understood that the lighting lamp described below refers to a lighting lamp panel.

[0069] The control circuit of the lighting lamp in the embodiment of the present application can be used in a lighting device. For example, the lighting device can be a mobile lighting device or other devices, and the present application does not limit this.

[0070] The technical solution of the present application is described in detail below in conjunction with specific embodiments. The following specific embodiments can be combined with each other or exist independently. The same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0071] Figure 2 A schematic diagram of a control circuit for a lighting fixture provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the control circuit 10 includes an overvoltage indication circuit 101 , and the lighting lamp 201 includes a plurality of LED branches 2011 .

[0072] The overvoltage indication circuit 101 is electrically connected to any one of the plurality of LED branches 2011 , and the overvoltage indication circuit 101 includes an indication component 1011 .

[0073] The overvoltage indication circuit 101 is configured as follows:

[0074] When the power supply voltage of the external power supply connected to the illuminating lamp is greater than the preset voltage, the indicating component 1011 prompts that the currently connected external power supply is wrong.

[0075] For example, if the preset voltage is 12V, when the power supply voltage of the external power supply connected to the lighting lamp is 24V, the overvoltage indication circuit 101 can prompt the user through the indication component 1011 that the currently connected external power supply is wrong, so that the user can cut off the external power supply in time to avoid connecting to the wrong external power supply for a long time, which may cause damage to the LED of the lighting lamp board.

[0076] Figure 3 A circuit structure diagram of an overvoltage indication circuit 101 provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the overvoltage indication circuit 101 further includes:

[0077] The first diode D1.

[0078] The second diode D2.

[0079] MOS.

[0080] The first resistor R1.

[0081] The second resistor R2.

[0082] Among them, MOS refers to Metal-Oxide-Semiconductor Field-Effect Transistor, abbreviated as Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) or Field Effect Transistor, and MOS is the abbreviation of MOSFET.

[0083] In a possible implementation, the MOS may be an NMOS (Negative channel-Metal-Oxide-Semiconductor).

[0084] NMOS transistors have low power consumption, which can reduce the energy consumption of the circuit, and have lower on-resistance, which can improve the efficiency of the circuit.

[0085] For example, Figure 4 A schematic diagram of an NMOS according to an example of this application.

[0086] like Figure 3 As shown, the anode of the first diode D1 is electrically connected to the gate of the MOS, and the cathode of the first diode D1 is electrically connected to the anode of the second diode D2 through a first electrical connection line.

[0087] The first end of the first resistor R1 is electrically connected to the first end of the second resistor R2 through a second electrical connection line, and the second end of the first resistor R1 is electrically connected to the first end of the indicating component 1011 .

[0088] The cathode of the second diode D2 is electrically connected to the second electrical connection line. The second end of the indicator element 1011 is electrically connected to the drain of the MOS.

[0089] The second end of the second resistor R2 is electrically connected to the target LED branch through the third electrical connection line. The first electrical connection line and the third electrical connection line are electrically connected through the fourth electrical connection line.

[0090] The source of the MOS is grounded.

[0091] The positive electrode of the external power source is electrically connected to the first end of the second resistor R2 . The target LED branch is any one of the multiple LED branches 2011 .

[0092] The negative terminal of the external power supply is connected to ground.

[0093] In one possible implementation, Figure 5 A structural diagram of another control circuit of a lighting lamp provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, the indication component 1011 may include an LED indicator light 12 .

[0094] The LED indicator light 12 is configured to light up when the power supply voltage of the external power supply connected to the lighting lamp 201 is greater than a preset voltage.

[0095] Specifically, the positive electrode of the LED indicator 12 is electrically connected to the first end of the first resistor, and the negative electrode of the LED indicator 12 is electrically connected to the drain of the MOS.

[0096] That is to say, when the external power supply connected is wrong, the lighting state of the LED indicator light 12 can be used to remind the user of the power connection error.

[0097] In a possible implementation, the first diode D1 may be a Zener diode.

[0098] In a possible implementation, the second diode D2 may be a voltage-stabilizing diode.

[0099] The first diode D1 and the second diode D2 use voltage regulator diodes to reduce the impact of overvoltage, maintain voltage stability, and make the circuit run more stable and reliable.

[0100] Below, an example is given in which the preset voltage is 12V, the resistance value of the first resistor R1 is 220 ohms, and the resistance value of the second resistor R2 is 220 ohms.

[0101] like Figure 3 As shown, when the power supply voltage of the external power supply connected to the lighting lamp is below the preset voltage, for example, the power supply voltage is 12V or less than 12V, the breakdown voltage of the second diode D2 is not reached, so that the second diode D2 is not turned on.

[0102] At this time, the voltage at point A is about 6V, which does not reach the breakdown voltage of the first diode D1, so that the first diode D1 is not conducting, the MOS is not conducting, and the LED indicator cannot light up.

[0103] At this time, the power supply voltage provides voltage to the LED of the target LED branch through the second resistor R2, so that the LED is lit.

[0104] When the power supply voltage of the external power supply connected to the lighting lamp is greater than the preset voltage, for example, the power supply voltage is 24V, the breakdown voltage of the second diode D2 is reached, so that the second diode D2 is turned on.

[0105] At this time, the voltage at point A is about 12V, reaching the breakdown voltage of the first diode D1, so that the first diode D1 is turned on, the MOS is turned on, and the LED indicator lights up.

[0106] At this time, the power supply voltage provides voltage to the LED of the target LED branch through the second resistor R2, so that the LED on the target LED branch is lit.

[0107] In a possible implementation, the light color of the LED indicator light may be red, and the red light may indicate a current power connection error.

[0108] In one possible implementation, Figure 6 A circuit structure diagram of another overvoltage indication circuit 101 provided in an embodiment of the present application is shown as follows: Figure 6 As shown, the indicating component 1011 may further include an alarm 13 , and the alarm 13 may be connected in series with the LED indicator light 12 .

[0109] Specifically, the first end of the alarm 13 may be electrically connected to the first end of the first resistor, and the second end of the alarm 13 may be electrically connected to the positive electrode of the LED indicator 12 .

[0110] Exemplarily, the alarm device 13 may be a buzzer or other element that can be used as an alarm prompt.

[0111] When the power supply voltage of the external power supply connected to the lighting lamp 201 is greater than the preset voltage, the alarm 13 works to give a corresponding prompt.

[0112] In one possible implementation, Figure 7 A structural diagram of a control circuit of another lighting lamp provided in an embodiment of the present application is shown in FIG. Figure 7 As shown, for any one LED branch among the multiple LED branches 2011 , the LED branch includes a current limiting resistor R3 and an LED component 110 .

[0113] The current limiting resistor R3 is connected in series with the LED component 110 , thereby protecting the LED component 110 .

[0114] That is to say, a current limiting resistor R3 is provided on each LED branch 2011, and the current limiting resistor R3 can be used to protect the LED assembly 110 on the LED branch.

[0115] In one possible implementation, Figure 8 A circuit structure diagram of another overvoltage indication circuit 101 provided in an embodiment of the present application is shown as follows: Figure 8 As shown, the LED assembly 11 may include one LED.

[0116] In any one of the multiple LED branches 2011 , the current limiting resistor R3 is connected in series with the LED on the LED branch.

[0117] For a lighting lamp in which each LED branch 2011 is lit by one LED, the lighting lamp 201 can be used in scenes with lower brightness requirements.

[0118] In one possible implementation, Fig. 9 A circuit structure diagram of another overvoltage indication circuit 101 provided in an embodiment of the present application is shown as follows: Fig. 9 As shown, the LED assembly 110 may include a plurality of LEDs, wherein the plurality of LEDs are connected in series. Fig. 9 Take 3 LEDs as an example.

[0119] On any one of the multiple LED branches, a current limiting resistor is connected in series with multiple LEDs on the LED branch. The series electrical connection can effectively increase the voltage, so that the LED branch can work normally.

[0120] For a lighting lamp in which each LED branch is lit by multiple LEDs, the lighting lamp can be used in scenes with higher brightness requirements.

[0121] In a possible implementation, the number of LEDs on a plurality of LED branches may be the same, so that the brightness of the lighting lamp can be uniform.

[0122] Fig.10 A schematic diagram of the structure of a lighting device provided in an embodiment of the present application is shown in FIG. Fig.10 As shown, the lighting device 20 includes:

[0123] Illumination 201.

[0124] A control circuit 10 of the lighting lamp 201 .

[0125] The lighting lamp 201 is electrically connected to the control circuit 10 . For the specific electrical connection method, reference may be made to the above embodiment and will not be repeated here.

[0126] It can be understood that the control circuit 10 may also include structures such as a brightness adjustment circuit and a control switch.

[0127] The brightness adjustment circuit can be used to adjust the brightness of the illuminating lamp 201 , and the control switch can be used to control the lighting or extinguishing of the illuminating lamp 201 .

[0128] It is understandable that the lighting device 20 may also include a shell and other structures for accommodating the lighting lamp 21 and the control circuit, and the present application does not limit this.

[0129] In the embodiment of the present application, 1 in the circuit diagram represents a first end, and 2 represents a second end.

[0130] For example, 1 of the first resistor R1 represents the first end of the first resistor R1, and 2 of the first resistor R1 represents the second end of the first resistor R1. 1 of the second resistor R2 represents the first end of the second resistor R2, and 2 of the second resistor R2 represents the second end of the second resistor R2. Others are similar and will not be repeated here.

[0131] In the embodiment of the present application, GND represents grounding.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0133] For ease of explanation, the above description has been made in conjunction with specific implementations. However, the above exemplary discussion is not intended to be exhaustive or limit the implementations to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained.

[0134] The selection and description of the above embodiments are intended to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various modified embodiments suitable for specific use considerations.

[0135] In this application, unless the context requires otherwise, throughout the specification and claims, the term "comprise" and other forms such as the third person singular form "comprises" and the present participle form "comprising" are to be interpreted as an open, inclusive meaning, that is, "including, but not limited to".

[0136] In this application, "exemplary", "in some embodiments", "in other embodiments", etc. are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present concepts in a concrete way.

[0137] The first, second, etc. descriptions appearing in the embodiments of the present application are only used for illustration and distinction of the description objects. There is no order, nor do they indicate any special limitation on the number of devices in the embodiments of the present application, and cannot constitute any limitation on the embodiments of the present application.

[0138] For example, the first threshold and the second threshold are only used to distinguish different thresholds, and do not represent the difference in size, priority or importance of the two thresholds.

[0139] In the description of the embodiments of the present application, unless otherwise specified, “plurality” may mean two or more than two.

[0140] In this application, the terms “of”, “corresponding, relevant”, “corresponding” and “associated” may sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings they intend to express are consistent.

[0141] The use of "adapted to" or "configured to" in this application is meant to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0142] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more conditions or values ​​may, in practice, be based on additional conditions or beyond those values.

[0143] Descriptions such as "about", "approximately" or "approximately" that appear in the embodiments of the present application include the stated values ​​and average values ​​that are within an acceptable deviation range for the particular value, wherein the acceptable deviation range is as determined by a person skilled in the art taking into account the measurement being discussed and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

Claims

1. A control circuit for a lighting lamp, characterized in that: The lighting lamp comprises a plurality of LED branches, and the plurality of LED branches are connected in parallel; the control circuit comprises: An overvoltage indication circuit is electrically connected to any one of the plurality of LED branches, the overvoltage indication circuit comprises an indication component, and the overvoltage indication circuit is configured as follows: When the power supply voltage of the external power supply connected to the lighting lamp is greater than the preset voltage, the indication component prompts that the currently connected external power supply is wrong.

2. The control circuit according to claim 1, characterized in that: The overvoltage indication circuit also includes: a first diode, a second diode, a field effect transistor MOS, a first resistor and a second resistor; Among them, the positive electrode of the first diode is electrically connected to the gate of the MOS, and the negative electrode of the first diode is electrically connected to the positive electrode of the second diode through a first electrical connection line; the first end of the first resistor is electrically connected to the first end of the second resistor through a second electrical connection line, and the second end of the first resistor is electrically connected to the first end of the indication component; the negative electrode of the second diode is electrically connected to the second electrical connection line; the second end of the indication component is electrically connected to the drain of the MOS; the second end of the second resistor is electrically connected to the target LED branch through a third electrical connection line; the first electrical connection line and the third electrical connection line are electrically connected through a fourth electrical connection line; the source of the MOS is grounded; the positive electrode of the external power supply is electrically connected to the first end of the second resistor; wherein the target LED branch is any one of the multiple LED branches.

3. The control circuit according to claim 2, characterized in that: The indicating component includes an LED indicator light; When the power supply voltage of the external power supply connected to the lighting lamp is greater than the preset voltage, the LED indicator light is turned on.

4. The control circuit according to claim 2, characterized in that: The MOS is NMOS.

5. The control circuit according to any one of claims 1 to 4, characterized in that: For any one LED branch among the multiple LED branches, the LED branch includes a current limiting resistor and an LED component connected in series with the current limiting resistor.

6. The control circuit according to claim 5, characterized in that: The LED assembly includes an LED.

7. The control circuit according to claim 5, characterized in that: If the LED assembly includes a plurality of LEDs, the plurality of LEDs are connected in series.

8. The control circuit according to claim 2, characterized in that: The first diode is a voltage regulator diode.

9. The control circuit according to claim 2, characterized in that: The second diode is a voltage regulator diode.

10. A lighting device, characterized in that: include: lighting; A control circuit as claimed in any one of claims 1 to 9.

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