Light emitting circuit and luminaire

Abstract

The utility model provides a kind of light-emitting circuit, comprising: light-emitting component, switch component and buffer component, light-emitting component can emit light, light-emitting component is at least provided with two, multiple light-emitting components are connected in parallel;Switch component is arranged between light-emitting component and driving power supply, for selectively control one or more light-emitting components and driving power supply between the loop established;Buffer component is arranged at light-emitting component, for when the loop established by light-emitting component and driving power supply is cut off, absorbing the energy released by driving power supply to the light-emitting component.The utility model discloses light-emitting circuit, it is provided with buffer component, can absorb the energy, avoid light-emitting component directly bears above-mentioned energy impact, also avoid light-emitting component from the flicker phenomenon of this energy, guarantee the stability, reliability of light-emitting component, also greatly prolong the service life of light-emitting component.The utility model also provides a kind of lamp.

Description

Technical Field

[0001] This utility model relates to the field of light-emitting circuits, and in particular to a light-emitting circuit and a lamp. Background Technology

[0002] Currently, common dual-color temperature LED adjustment circuits on the market typically use mechanical switches (such as slide switches, DIP switches, toggle switches, etc.) to control the on and off of LED beads.

[0003] However, the traditional approach has the following drawbacks:

[0004] 1. LED flickering problem: During the switching process, the output terminal of the LED driver power supply stores energy due to the large electrolytic capacitor. If the load is suddenly disconnected, the energy stored in the capacitor will be rapidly discharged to the LED, causing the LED to flicker.

[0005] 2. LED damage risk: Due to the instantaneous release of energy, LEDs may be damaged by overcurrent or overvoltage.

[0006] 3. Inappropriate traditional circuit layout: Some solutions connect the switch in series between the negative terminal of the LED load and the negative terminal of the driver, causing the LED load to directly bear the energy impact when the switch is switched, which exacerbates the above problems. Utility Model Content

[0007] To overcome the shortcomings of existing technologies, this utility model provides a light-emitting circuit with a buffer component that absorbs the energy, preventing the light-emitting component from directly experiencing the energy impact and also preventing flickering due to the energy, thus ensuring the stability and reliability of the light-emitting component and greatly extending its service life. This utility model also provides a lamp.

[0008] To achieve the above objectives, the present invention employs the following technical solution:

[0009] A light-emitting circuit, comprising:

[0010] A light-emitting component, wherein the light-emitting component is capable of emitting light, and at least two light-emitting components are provided, and multiple light-emitting components are arranged in parallel;

[0011] A switching assembly, disposed between the light-emitting component and the driving power supply, for selectively controlling the establishment of a circuit between one or more of the light-emitting components and the driving power supply;

[0012] And a buffer component, which is disposed at the light-emitting component and is used to absorb the energy released by the driving power supply to the light-emitting component when the circuit established between the light-emitting component and the driving power supply is cut off.

[0013] Using the above technical solution, the user can operate the switch assembly to establish a circuit between a certain light-emitting component and the driving power supply to work and emit light, or to establish a circuit between several light-emitting components and the driving power supply to work and emit light, thereby realizing the adjustment of brightness and / or color temperature;

[0014] During the adjustment process, the switching component needs to be operated to connect and disconnect the light-emitting component from the driving power supply. The output terminal of the driving power supply usually has a large electrolytic capacitor for filtering. When the input terminal of the driving power supply is not disconnected, there will always be charge stored in the filter capacitor at its output terminal. When the switching component disconnects the circuit established between the light-emitting component and the driving power supply, the overvoltage protection (OVP) adjustment mechanism of the driving power supply may not have been activated yet. In this case, the energy stored in the filter circuit at the output terminal of the driving power supply will quickly discharge to the light-emitting component. Due to the setting of the buffer component, it can absorb this energy, preventing the light-emitting component from directly bearing the above energy impact. It also prevents the light-emitting component from flickering due to this energy, ensuring the stability and reliability of the light-emitting component, and greatly extending the service life of the light-emitting component.

[0015] Furthermore, the buffer assembly is disposed behind the switch assembly.

[0016] The above technical solution makes the buffer component more reasonable.

[0017] Furthermore, the buffer component includes a buffer capacitor, the number of which matches the number of light-emitting components and is connected in parallel to both ends of each light-emitting component.

[0018] By adopting the above technical solution, the buffer component is made more reasonable. Since the buffer capacitor has a certain charge storage capacity, it can absorb the energy released by the driving power supply to the light-emitting component when the circuit established between the light-emitting component and the driving power supply is cut off, and the voltage across the buffer capacitor cannot change abruptly. This avoids the light-emitting component from directly bearing the above energy impact, and also avoids the light-emitting component from flickering due to the energy, ensuring the stability and reliability of the light-emitting component, and greatly extending the service life of the light-emitting component.

[0019] Furthermore, the buffer capacitor is an electrolytic capacitor, with the positive terminal of the buffer capacitor connected to the end of the corresponding light-emitting component that is connected to the positive terminal of the driving power supply, and the negative terminal of the buffer capacitor connected to the end of the corresponding light-emitting component that is connected to the negative terminal of the driving power supply.

[0020] By adopting the above technical solution, the buffer capacitor is made more reasonable, enabling it to better absorb impact energy and thus better protect the light-emitting component.

[0021] Furthermore, the plurality of light-emitting components are classified into at least two color temperature types according to their color temperature characteristics, and each color temperature type of light-emitting component has a corresponding preset color temperature parameter.

[0022] By adopting the above technical solution, the light-emitting circuit becomes more reasonable. Since the multiple light-emitting components are divided into at least two color temperature types according to their color temperature characteristics, the color temperature can be adjusted by controlling the connection of the light-emitting components. For example, the situation and ratio of the light-emitting components of different color temperature types establishing a circuit with the driving power supply can be controlled to achieve the adjustment of mixed color temperature.

[0023] Furthermore, each of the light-emitting components includes at least one LED light-emitting unit, and when a single light-emitting component includes multiple LED light-emitting units, the multiple LED light-emitting units in the single light-emitting component are connected in series.

[0024] By adopting the above technical solution, the light-emitting component is made more reasonable; generally, each light-emitting component includes multiple LED light-emitting units.

[0025] Furthermore, the switching assembly is used to selectively control the connection and disconnection between one or more of the light-emitting components and the positive terminal of the driving power supply.

[0026] And / or the switching assembly is used to selectively control the connection and disconnection between one or more of the light-emitting components and the negative terminal of the driving power supply.

[0027] By adopting the above technical solution, the switching assembly is made more reasonable. Users only need to operate the switching unit to turn it on or off to determine whether the corresponding light-emitting component establishes a circuit with the driving power supply.

[0028] Preferably, the switching assembly is used to selectively control the connection and disconnection between one or more of the light-emitting components and the positive terminal of the driving power supply.

[0029] By adopting the above technical solution, compared with the case where the switching assembly is used to selectively control the connection and disconnection between one or more of the light-emitting components and the negative terminal of the driving power supply, the above structure can reduce the direct impact on the light-emitting components when the switching assembly switches the circuit.

[0030] Furthermore, the switching assembly includes a switching unit capable of switching the circuit on and off, and the number of the switching units matches the number of the light-emitting components; each of the switching units is connected in series on the branch where the corresponding light-emitting component is located.

[0031] By adopting the above technical solution, the switching component is made more reasonable. Users only need to operate the switching unit to open or close it to realize whether the corresponding light-emitting component establishes a circuit with the driving power supply.

[0032] Preferably, each of the switching units is connected in series between the end of the light-emitting component that is connected to the positive terminal of the driving power supply and the positive terminal of the driving power supply; the above technical solution can more effectively disconnect the connection between the driving power supply and the light-emitting component, and prevent the light-emitting component from being directly subjected to energy impact.

[0033] Furthermore, the switch assembly adopts one of the following: a slide switch, a DIP switch, a toggle switch, and a push-button switch.

[0034] By adopting the above technical solution, the switch assembly becomes more reasonable and easier for users to use and operate.

[0035] Furthermore, the light-emitting component is provided in two parts, namely a first light-emitting component and a second light-emitting component. The first light-emitting component can emit light with a first color temperature, and the second light-emitting component can emit light with a second color temperature. The first color temperature and the second color temperature are different.

[0036] Correspondingly, the switching unit includes a first switching unit and a second switching unit;

[0037] The first switch unit is connected in series between the end of the first light-emitting component that is connected to the positive terminal of the driving power supply and the positive terminal of the driving power supply, and the end of the first light-emitting component that is connected to the negative terminal of the driving power supply is connected to the negative terminal of the driving power supply; or the first switch unit is connected in series between the end of the first light-emitting component that is connected to the negative terminal of the driving power supply and the negative terminal of the driving power supply, and the end of the first light-emitting component that is connected to the positive terminal of the driving power supply is connected to the positive terminal of the driving power supply.

[0038] The second switch unit is connected in series between the end of the second light-emitting component that is connected to the positive terminal of the driving power supply and the positive terminal of the driving power supply, and the end of the second light-emitting component that is connected to the negative terminal of the driving power supply is connected to the negative terminal of the driving power supply; or the second switch unit is connected in series between the end of the second light-emitting component that is connected to the negative terminal of the driving power supply and the negative terminal of the driving power supply, and the end of the second light-emitting component that is connected to the positive terminal of the driving power supply is connected to the positive terminal of the driving power supply.

[0039] Specifically, the first color temperature is 3000K, and the second color temperature is 6000K.

[0040] By adopting the above technical solution, the light-emitting circuit becomes more reasonable;

[0041] When the first switching unit is on and the second switching unit is off, the first light-emitting component establishes a circuit with the driving power supply, while the second light-emitting component does not establish a circuit with the driving power supply. The first light-emitting component works to emit light, while the second light-emitting component does not work. At this time, the overall color temperature is the first color temperature, which is 3000K.

[0042] When the first switching unit is open and the second switching unit is on, the first light-emitting component does not establish a circuit with the driving power supply, while the second light-emitting component establishes a circuit with the driving power supply. The first light-emitting component does not work, while the second light-emitting component works and emits light. At this time, the overall color temperature is the second color temperature, which is 6000K.

[0043] When the first switching unit is on and the second switching unit is on, the first light-emitting component establishes a circuit with the driving power supply, and the second light-emitting component establishes a circuit with the driving power supply. The first light-emitting component emits light, and the second light-emitting component emits light. At this time, the overall color temperature is the mixed color temperature of the first color temperature and the second color temperature, which is 4500K.

[0044] A lighting fixture, comprising the aforementioned light-emitting circuit.

[0045] By adopting the above technical solution, the lamp is made more reasonable. When the circuit established between the light-emitting component and the driving power supply is cut off, the light-emitting component can be prevented from directly bearing the energy released by the driving power supply to the light-emitting component. At the same time, the light-emitting component is prevented from flickering due to the energy, ensuring the stability and reliability of the light-emitting component and greatly extending the service life of the light-emitting component.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] (1) The light-emitting circuit and lamp of this utility model are provided with a buffer component, which can absorb the energy, prevent the light-emitting component from being directly subjected to the energy impact, and also prevent the light-emitting component from flickering due to the energy, ensuring the stability and reliability of the light-emitting component, and greatly extending the service life of the light-emitting component.

[0048] (2) In the light-emitting circuit and lamp of this utility model, each of the switching units is connected in series between the end of the light-emitting component that is connected to the positive terminal of the driving power supply and the positive terminal of the driving power supply; the above technical solution can more effectively cut off the connection between the driving power supply and the light-emitting component, and avoid the light-emitting component being directly subjected to energy impact.

[0049] (3) The light-emitting circuit and lamp of this utility model are reasonably designed. Attached Figure Description

[0050] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a schematic diagram of the light-emitting circuit of this utility model;

[0052] The component names corresponding to the various reference numerals in the figure are as follows: 1. Light-emitting component; 101. LED light-emitting unit; 102. First light-emitting component; 103. Second light-emitting component; 2. Switching component; 201. Switching unit; 2011. First switching unit; 2012. Second switching unit; 3. Buffering component; 301. Buffer capacitor; 100. Driving power supply. Detailed Implementation

[0053] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0054] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0056] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0057] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0058] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0059] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0060] See Figure 1 This utility model provides a light-emitting circuit, comprising:

[0061] Light-emitting component 1, which is capable of emitting light, and at least two light-emitting components 1 are provided, and multiple light-emitting components 1 are arranged in parallel;

[0062] A switching component 2 is disposed between the light-emitting component 1 and the driving power supply 100, and is used to selectively control one or more of the light-emitting components 1 to establish a circuit with the driving power supply 100;

[0063] And a buffer component 3, which is disposed at the light-emitting component 1 and is used to absorb the energy released by the driving power supply 100 to the light-emitting component 1 when the circuit established between the light-emitting component 1 and the driving power supply 100 is cut off.

[0064] Using the above technical solution, the user can operate the switch component 2 to establish a circuit between a certain light-emitting component 1 and the driving power supply 100 to work and emit light, or to establish a circuit between several light-emitting components 1 and the driving power supply 100 to work and emit light, thereby realizing the adjustment of brightness and / or color temperature.

[0065] During the adjustment process, the switching component 2 needs to be operated to switch the connection between the light-emitting component 1 and the driving power supply 100. The output terminal of the driving power supply 100 is usually equipped with a large electrolytic capacitor for filtering. When the input terminal of the driving power supply 100 is not disconnected, there will always be charge stored in the filter capacitor at its output terminal. When the switching component 2 disconnects the circuit established between the light-emitting component 1 and the driving power supply 100, the OVP (overvoltage protection) adjustment mechanism of the driving power supply 100 may not have been activated yet. The energy stored in the filter circuit at the output terminal of the driving power supply 100 will quickly discharge to the light-emitting component 1. Due to the setting of the buffer component 3, it can absorb this energy, preventing the light-emitting component 1 from directly bearing the above-mentioned energy impact. It also prevents the light-emitting component 1 from flickering due to this energy, ensuring the stability and reliability of the light-emitting component 1, and greatly extending the service life of the light-emitting component 1.

[0066] Furthermore, the buffer component 3 is disposed behind the switch component 2.

[0067] By adopting the above technical solution, the buffer component 3 becomes more reasonable.

[0068] Furthermore, the buffer component 3 includes a buffer capacitor 301, the number of which matches the number of light-emitting components 1, and they are connected in parallel to each light-emitting component 1.

[0069] By adopting the above technical solution, the buffer component 3 becomes more reasonable. Since the buffer capacitor 301 has a certain charge storage capacity, it can absorb the energy released by the driving power supply 100 to the light-emitting component 1 when the circuit established between the light-emitting component 1 and the driving power supply 100 is cut off, and the voltage across the buffer capacitor 301 cannot change abruptly. This avoids the light-emitting component 1 from directly bearing the above energy impact, and also avoids the light-emitting component 1 from flickering due to the energy, ensuring the stability and reliability of the light-emitting component 1, and greatly extending the service life of the light-emitting component 1.

[0070] Furthermore, the buffer capacitor 301 is an electrolytic capacitor. The positive terminal of the buffer capacitor 301 is connected to the end of the corresponding light-emitting component 1 that is connected to the positive terminal of the driving power supply 100, and the negative terminal of the buffer capacitor 301 is connected to the end of the corresponding light-emitting component 1 that is connected to the negative terminal of the driving power supply 100.

[0071] By adopting the above technical solution, the buffer capacitor 301 is made more reasonable, enabling the buffer capacitor 301 to better absorb impact energy, thereby better protecting the light-emitting component 1.

[0072] Furthermore, the plurality of light-emitting components 1 are classified into at least two color temperature types according to their color temperature characteristics, and each color temperature type of light-emitting component 1 has a corresponding preset color temperature parameter.

[0073] By adopting the above technical solution, the light-emitting circuit is made more reasonable. Since the multiple light-emitting components 1 are divided into at least two color temperature types according to their color temperature characteristics, the color temperature can be adjusted by controlling the connection of the light-emitting components 1. For example, the situation and ratio of the light-emitting components 1 of different color temperature types establishing a circuit with the driving power supply 100 can be controlled to achieve the adjustment of mixed color temperature.

[0074] Furthermore, each of the light-emitting components 1 includes at least one LED light-emitting unit 101. When a single light-emitting component 1 includes multiple LED light-emitting units 101, the multiple LED light-emitting units 101 in the single light-emitting component 1 are connected in series.

[0075] By adopting the above technical solution, the light-emitting component 1 is made more reasonable; generally, each light-emitting component 1 includes multiple LED light-emitting units 101.

[0076] Furthermore, the switching assembly 2 is used to selectively control the connection and disconnection between one or more of the light-emitting components 1 and the positive terminal of the driving power supply 100.

[0077] And / or the switching assembly 2 is used to selectively control the connection and disconnection between one or more of the light-emitting components 1, one end of which is connected to the negative terminal of the driving power supply 100, and the negative terminal of the driving power supply 100.

[0078] By adopting the above technical solution, the switch assembly 2 is made more reasonable. Users only need to operate the switch unit 201 to determine whether the corresponding light-emitting component 1 establishes a circuit with the driving power supply 100.

[0079] Preferably, the switching component 2 is used to selectively control the connection and disconnection between one or more of the light-emitting components 1 and the positive terminal of the driving power supply 100.

[0080] By adopting the above technical solution, compared with the case where the switching component 2 is used to selectively control the connection and disconnection between one or more of the light-emitting components 1 and the negative terminal of the driving power supply 100, the above structure can reduce the direct impact on the light-emitting components 1 when the switching component 2 switches the circuit.

[0081] Furthermore, the switching assembly 2 includes a switching unit 201 capable of switching the circuit on and off, and the number of the switching units 201 matches the number of the light-emitting components 1; each of the switching units 201 is connected in series on the branch where the corresponding light-emitting component 1 is located.

[0082] By adopting the above technical solution, the switch assembly 2 is made more reasonable. Users only need to operate the switch unit 201 to determine whether the corresponding light-emitting component 1 establishes a circuit with the driving power supply 100.

[0083] Preferably, each of the switching units 201 is connected in series between the end of the light-emitting component 1 that is connected to the positive terminal of the driving power supply 100 and the positive terminal of the driving power supply 100; the above technical solution can more effectively disconnect the connection between the driving power supply 100 and the light-emitting component 1, and prevent the light-emitting component 1 from being directly subjected to energy impact.

[0084] Furthermore, the switch assembly 2 adopts one of the following: a slide switch, a DIP switch, a toggle switch, and a push-button switch.

[0085] By adopting the above technical solution, the switch assembly 2 becomes more reasonable and easier for users to use and operate.

[0086] Furthermore, the light-emitting component 1 is provided in two parts, namely a first light-emitting component 102 and a second light-emitting component 103. The first light-emitting component 102 can emit light with a first color temperature, and the second light-emitting component 103 can emit light with a second color temperature. The first color temperature and the second color temperature are different.

[0087] Correspondingly, the switching unit 201 includes a first switching unit 2011 and a second switching unit 2012;

[0088] The first switching unit 2011 is connected in series between the end of the first light-emitting component 102 that is connected to the positive terminal of the driving power supply 100 and the positive terminal of the driving power supply 100, and the end of the first light-emitting component 102 that is connected to the negative terminal of the driving power supply 100 is connected to the negative terminal of the driving power supply 100; or the first switching unit 2011 is connected in series between the end of the first light-emitting component 102 that is connected to the negative terminal of the driving power supply 100 and the negative terminal of the driving power supply 100, and the end of the first light-emitting component 102 that is connected to the positive terminal of the driving power supply 100 is connected to the positive terminal of the driving power supply 100.

[0089] The second switching unit 2012 is connected in series between the end of the second light-emitting component 103 that is connected to the positive terminal of the driving power supply 100 and the positive terminal of the driving power supply 100, and the end of the second light-emitting component 103 that is connected to the negative terminal of the driving power supply 100 is connected to the negative terminal of the driving power supply 100; or the second switching unit 2012 is connected in series between the end of the second light-emitting component 103 that is connected to the negative terminal of the driving power supply 100 and the negative terminal of the driving power supply 100, and the end of the second light-emitting component 103 that is connected to the positive terminal of the driving power supply 100 is connected to the positive terminal of the driving power supply 100.

[0090] Specifically, the first color temperature is 3000K, and the second color temperature is 6000K.

[0091] By adopting the above technical solution, the light-emitting circuit becomes more reasonable;

[0092] When the first switching unit 2011 is on and the second switching unit 2012 is off, the first light-emitting component 102 establishes a circuit with the driving power supply 100, and the second light-emitting component 103 does not establish a circuit with the driving power supply 100. The first light-emitting component 102 works to emit light, and the second light-emitting component 103 does not work. At this time, the overall color temperature is the first color temperature, that is, a color temperature of 3000K.

[0093] When the first switching unit 2011 is open and the second switching unit 2012 is on, the first light-emitting component 102 does not establish a circuit with the driving power supply 100, and the second light-emitting component 103 establishes a circuit with the driving power supply 100. The first light-emitting component 102 does not work, and the second light-emitting component 103 works and emits light. At this time, the overall color temperature is the second color temperature, which is 6000K.

[0094] When the first switching unit 2011 is turned on and the second switching unit 2012 is turned on, the first light-emitting component 102 establishes a circuit with the driving power supply 100, and the second light-emitting component 103 establishes a circuit with the driving power supply 100. The first light-emitting component 102 emits light, and the second light-emitting component 103 emits light. At this time, the overall color temperature is the mixed color temperature of the first color temperature and the second color temperature, which is 4500K.

[0095] A lighting fixture, comprising the aforementioned light-emitting circuit.

[0096] By adopting the above technical solution, the lamp is made more reasonable. When the circuit established between the light-emitting component 1 and the driving power supply 100 is cut off, the light-emitting component 1 can be prevented from directly bearing the energy released by the driving power supply 100 to the light-emitting component 1. At the same time, the light-emitting component 1 is prevented from flickering due to the energy, ensuring the stability and reliability of the light-emitting component 1 and greatly extending the service life of the light-emitting component 1.

[0097] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0098] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A light-emitting circuit, characterized in that, include: A light-emitting component (1) is provided, wherein the light-emitting component (1) is capable of emitting light, and at least two light-emitting components (1) are provided, and multiple light-emitting components (1) are arranged in parallel; A switching assembly (2) is disposed between the light-emitting component (1) and the driving power supply (100) for selectively controlling one or more of the light-emitting components (1) to establish a circuit between the driving power supply (100); And a buffer component (3), which is disposed at the light-emitting component (1) and is used to absorb the energy released by the driving power supply (100) to the light-emitting component (1) when the circuit established between the light-emitting component (1) and the driving power supply (100) is cut off.

2. The light-emitting circuit according to claim 1, characterized in that: The buffer assembly (3) is disposed behind the switch assembly (2); The buffer component (3) includes a buffer capacitor (301), the number of which matches the number of the light-emitting components (1) and are connected in parallel to each light-emitting component (1).

3. The light-emitting circuit according to claim 2, characterized in that: The buffer capacitor (301) is an electrolytic capacitor. The positive terminal of the buffer capacitor (301) is connected to the end of the corresponding light-emitting component (1) that is connected to the positive terminal of the driving power supply (100), and the negative terminal of the buffer capacitor (301) is connected to the end of the corresponding light-emitting component (1) that is connected to the negative terminal of the driving power supply (100).

4. The light-emitting circuit according to claim 1, characterized in that: The multiple light-emitting components (1) are classified into at least two color temperature types according to their color temperature characteristics, and each color temperature type of light-emitting component (1) has a corresponding preset color temperature parameter.

5. The light-emitting circuit according to claim 4, characterized in that: Each of the light-emitting components (1) includes at least one LED light-emitting unit (101), and when a single light-emitting component (1) includes multiple LED light-emitting units (101), the multiple LED light-emitting units (101) in the single light-emitting component (1) are connected in series.

6. The light-emitting circuit according to claim 2, characterized in that: The switching assembly (2) is used to selectively control the connection and disconnection between one or more of the light-emitting components (1) and the positive terminal of the driving power supply (100); And / or the switching assembly (2) is used to selectively control one or more of the light-emitting components (1) for switching between the end connected to the negative terminal of the driving power supply (100) and the negative terminal of the driving power supply (100).

7. The light-emitting circuit according to claim 6, characterized in that: The switching assembly (2) includes a switching unit (201) capable of switching the circuit on and off. The number of the switching units (201) matches the number of the light-emitting components (1). Each switching unit (201) is connected in series on the branch where the corresponding light-emitting component (1) is located.

8. The light-emitting circuit according to claim 6, characterized in that: The switch assembly (2) is one of a slide switch, DIP switch, toggle switch, or push button switch.

9. The light-emitting circuit according to claim 7, characterized in that: The light-emitting component (1) is provided in two parts, namely a first light-emitting component (102) and a second light-emitting component (103). The first light-emitting component (102) can emit light with a first color temperature, and the second light-emitting component (103) can emit light with a second color temperature. The first color temperature and the second color temperature are different. Correspondingly, the switching unit (201) includes a first switching unit (2011) and a second switching unit (2012); The first switching unit (2011) is connected in series between the end of the first light-emitting component (102) used to connect to the positive terminal of the driving power supply (100) and the positive terminal of the driving power supply (100), and the end of the first light-emitting component (102) used to connect to the negative terminal of the driving power supply (100) is connected to the negative terminal of the driving power supply (100); or the first switching unit (2011) is connected in series between the end of the first light-emitting component (102) used to connect to the negative terminal of the driving power supply (100) and the negative terminal of the driving power supply (100), and the end of the first light-emitting component (102) used to connect to the positive terminal of the driving power supply (100) is connected to the positive terminal of the driving power supply (100); The second switching unit (2012) is connected in series between the end of the second light-emitting component (103) used to connect to the positive terminal of the driving power supply (100) and the positive terminal of the driving power supply (100), and the end of the second light-emitting component (103) used to connect to the negative terminal of the driving power supply (100) is connected to the negative terminal of the driving power supply (100); or the second switching unit (2012) is connected in series between the end of the second light-emitting component (103) used to connect to the negative terminal of the driving power supply (100) and the negative terminal of the driving power supply (100), and the end of the second light-emitting component (103) used to connect to the positive terminal of the driving power supply (100) is connected to the positive terminal of the driving power supply (100).

10. A lamp, characterized in that: Includes the light-emitting circuit according to any one of claims 1 to 9.

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