Light emitting circuit and luminaire

Abstract

This invention provides a light-emitting circuit, including a light-emitting component, a switching component, and an adjusting component. The light-emitting component emits light, and at least two light-emitting components are provided, with multiple light-emitting components connected in parallel. The switching component is disposed between the light-emitting component and the driving power supply, and is used to selectively control the establishment of a circuit between one or more light-emitting components and the driving power supply. The adjusting component is disposed between the light-emitting component and the driving power supply, and is used to adjust the current amplitude flowing through each branch of the light-emitting component to achieve current balance among the branches. This light-emitting circuit, with its adjusting component, can adjust the current amplitude flowing through each branch of the light-emitting component to achieve current balance among the branches, thereby reducing brightness unevenness or reducing the deviation of the actual output when mixing color temperatures. This invention also provides a 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] In some LED lighting applications, it's often necessary for luminaires to adjust the color temperature of LEDs to improve environmental comfort and visual effects for different application scenarios. However, while electronic intelligent color temperature adjustment has become the industry mainstream, this method suffers from signal loss and delays during transmission. Furthermore, the cost of components for intelligent control is relatively high. To control costs and enhance product appeal, current LED color temperature adjustment often uses mechanical switches (such as DIP switches, slide switches, and toggle switches) to directly control the parallel connection of LEDs with different color temperatures. Due to batch-to-batch variations in the terminal voltage (VF value) of LED chips, voltage deviation intensifies when a large number of chips are connected in series, leading to uneven current distribution in the parallel branches. Specifically:

[0003] 1. Color temperature deviation: LEDs with low VF values ​​have higher branch currents, and the actual output deviates from expectations when mixing color temperatures;

[0004] 2. Reliability risks: Uneven current may accelerate LED light decay and increase customer complaint rate.

[0005] In summary, in the existing technologies, constant current drive or complex IC control schemes are costly, while simple mechanical switch schemes cannot solve the current balance problem. Utility Model Content

[0006] To overcome the shortcomings of existing technologies, this utility model provides a light-emitting circuit with an adjustment component that can adjust the current amplitude flowing through each branch of the light-emitting component to achieve current balance among the branches of each light-emitting component, thereby reducing brightness unevenness or the deviation of the actual output when mixing color temperatures. This utility model also provides a lamp.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] A light-emitting circuit, comprising:

[0009] 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;

[0010] 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;

[0011] The system also includes an adjustment component disposed between the light-emitting component and the driving power supply, which is used to adjust the current amplitude flowing through each branch of the light-emitting component to achieve current balance among the branches of each light-emitting component.

[0012] 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;

[0013] The light-emitting components may have batch differences or their resistance may vary due to temperature. When multiple light-emitting components establish a circuit with the driving power supply, uneven current distribution may occur in the branches where the light-emitting components are located. Due to the setting of the adjustment component, it can automatically balance the current between the branches where the light-emitting components are located when the current distribution between the branches is uneven, so that the current magnitude between the branches where the light-emitting components are located tends to be consistent. Moreover, the adjustment component is dynamically adjusted in real time, thereby reducing the degree of brightness non-uniformity or reducing the deviation of the actual output when mixing color temperature.

[0014] Furthermore, the adjustment component includes an adjustment resistor, the number of which matches the number of light-emitting components and is connected in series in a one-to-one correspondence with the branch where each light-emitting component is located, and the resistance of the adjustment resistor increases as the current increases.

[0015] By adopting the above technical solution, the adjustment component becomes more reasonable. When multiple light-emitting components establish a circuit with the driving power supply, if the current between the branches where the light-emitting components are located is unbalanced, the resistance of the adjustment resistor in the branch with increased current will increase, thereby limiting the current growth in that branch and forming negative feedback. Ultimately, the current between the branches where the light-emitting components are located can be made more consistent and can be dynamically adjusted in real time.

[0016] Furthermore, the regulating resistor is a PTC thermistor, i.e., a positive temperature coefficient thermistor.

[0017] By adopting the above technical solution, the regulating resistor is made more reasonable. The regulating resistor is a PTC thermistor, which makes its resistance increase when the temperature rises. Therefore, the heating of the regulating resistor in the branch with increased current increases, thereby increasing the resistance of the regulating resistor, thus limiting the current growth in the branch, forming negative feedback, and ultimately enabling the current between the branches where the light-emitting components are located to tend to be consistent, and can be dynamically adjusted in real time.

[0018] Specifically, the parameters of each of the adjustable resistors are consistent.

[0019] 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.

[0020] 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.

[0021] Furthermore, each of the light-emitting components includes at least one LED light-emitting unit. 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. Specifically, the LED light-emitting unit is an LED light-emitting diode.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Furthermore, when each of the light-emitting components corresponds to one of the switching units, each of the light-emitting components is connected to the driving power supply through series connection of the corresponding regulating resistor and the switching unit;

[0026] When each of the light-emitting components corresponds to two of the switching units, each of the light-emitting components is connected to the driving power supply through the two switching units to form two parallel switching control loops. One of the two switching control loops is connected in series with the corresponding regulating resistor, and the other is not connected in series with the corresponding regulating resistor.

[0027] With the above technical solution, when each light-emitting component corresponds to one switching unit, the regulating resistor will participate regardless of whether a single light-emitting component establishes a circuit with the driving power supply or multiple light-emitting components establish a circuit with the driving power supply.

[0028] When each of the light-emitting components corresponds to two of the switching units, if a single light-emitting component establishes a circuit with the driving power supply, the user can operate the switching unit to establish a circuit with the driving power supply through a switching control circuit that does not connect in series with the corresponding regulating resistor. If multiple light-emitting components establish a circuit with the driving power supply, the user can operate the switching unit to establish a circuit with the driving power supply through a switching control circuit that connects in series with the corresponding regulating resistor. This makes the switching components more efficient. Since there is no problem of uneven current distribution when a single light-emitting component establishes a circuit with the driving power supply, there is no need to use a regulating resistor. The above structure can avoid unnecessary power loss.

[0029] Furthermore, when each of the light-emitting components corresponds to two of the switching units, the two switching units corresponding to each of the light-emitting components are configured to be mutually exclusive, that is, only one of the two switching units corresponding to each of the light-emitting components is turned on at the same time.

[0030] The above technical solution makes the switching unit more reasonable.

[0031] Furthermore, the switch assembly adopts a multi-position switch, specifically, the switch assembly adopts a multi-position toggle switch.

[0032] By adopting the above technical solution, the switch assembly becomes more reasonable and easier for users to operate.

[0033] 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.

[0034] The system is provided with two adjustable resistors, namely a first adjustable resistor and a second adjustable resistor;

[0035] The switch assembly is a three-position switch;

[0036] The first and third pins of the switch assembly form a switch unit, the second and third pins of the switch assembly form a switch unit, the seventh and sixth pins of the switch assembly form a switch unit, and the fifth and sixth pins of the switch assembly form a switch unit; when the switch assembly is in the first position, the first and third pins of the switch assembly are connected; when the switch assembly is in the second position, the second and third pins of the switch assembly are connected, and the seventh and sixth pins of the switch assembly are connected; when the switch assembly is in the third position, the fifth and sixth pins of the switch assembly are connected.

[0037] When the switching assembly is positioned between the light-emitting component and the positive terminal of the driving power supply, the third and sixth pins of the switching assembly are connected to the positive terminal of the driving power supply, the first pin of the switching assembly is connected to the positive terminal of the first light-emitting component, the second pin of the switching assembly is connected to the positive terminal of the first light-emitting component and connected in series with the first regulating resistor, the seventh pin of the switching assembly is connected to the positive terminal of the second light-emitting component and connected in series with the second regulating resistor, the fifth pin of the switching assembly is connected to the positive terminal of the second light-emitting component, and the negative terminals of the first and second light-emitting components are connected to the negative terminal of the driving power supply.

[0038] When the switching assembly is positioned between the light-emitting component and the negative terminal of the driving power supply, the third and sixth pins of the switching assembly are connected to the negative terminal of the driving power supply, the first pin of the switching assembly is connected to the negative terminal of the first light-emitting component, the second pin of the switching assembly is connected to the negative terminal of the first light-emitting component and connected in series with the first regulating resistor, the seventh pin of the switching assembly is connected to the negative terminal of the second light-emitting component and connected in series with the second regulating resistor, the fifth pin of the switching assembly is connected to the negative terminal of the second light-emitting component, and the positive terminals of the first and second light-emitting components are connected to the positive terminal of the driving power supply.

[0039] Specifically, the switch assembly uses a three-position switch, specifically the SS23D13 model three-position toggle switch, with the first color temperature being 3000K and the second color temperature being 6000K.

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

[0041] When the switching component is in the first position, the first light-emitting component does not establish a circuit with the driving power supply through the corresponding regulating resistor. The first light-emitting component works and emits light. At this time, the overall color temperature is the first color temperature, that is, 3000K color temperature.

[0042] When the switching component is in the second position, the first light-emitting component establishes a circuit with the driving power supply through the corresponding regulating resistor, and the second light-emitting component establishes a circuit with the driving power supply through the corresponding regulating resistor. 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.

[0043] When the switch assembly is in the third position, the second light-emitting component does not establish a circuit with the driving power supply through the corresponding regulating resistor, and the second light-emitting component works to emit light. At this time, the overall color temperature is the second color temperature, that is, a color temperature of 6000K.

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

[0045] By adopting the above technical solutions, the lighting fixtures become more reasonable, which can reduce the degree of brightness unevenness or the deviation of the actual output when mixing color temperatures.

[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 an adjustment component, which can adjust the current amplitude flowing through each of the light-emitting components to achieve the balance of current between the branches of each light-emitting component, thereby reducing the degree of brightness unevenness or the degree of deviation of the actual output when mixing color temperature.

[0048] (2) The light-emitting circuit and lamp of this utility model are reasonably designed. Attached Figure Description

[0049] 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.

[0050] Figure 1 This is a schematic diagram of the light-emitting circuit of this utility model;

[0051] Figure 2 This is a schematic diagram of the switching component structure in 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; 202. First pin; 203. Second pin; 204. Third pin; 205. Fifth pin; 206. Sixth pin; 207. Seventh pin; 3. Adjustment component; 301. Adjustment resistor; 3011. First adjustment resistor; 3012. Second adjustment resistor; 4. Switching control circuit; 100. Drive 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 Figures 1 to 2 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 an adjustment component 3, which is disposed between the light-emitting component 1 and the driving power supply 100, and is used to adjust the current amplitude flowing through each branch of the light-emitting component 1, so as to achieve current balance among the branches of each light-emitting component 1.

[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] The light-emitting components 1 may have batch differences or their resistance may vary due to temperature. When multiple light-emitting components 1 establish a circuit with the driving power supply 100, the current distribution in the branch where each light-emitting component 1 is located may be uneven. Due to the setting of the adjustment component 3, it can automatically balance the current between the branches where each light-emitting component 1 is located when the current distribution in the branch where each light-emitting component 1 is located is uneven, so that the current magnitude between the branches where each light-emitting component 1 is located tends to be consistent. Moreover, the adjustment component 3 is dynamically adjusted in real time, thereby reducing the degree of brightness unevenness or reducing the deviation of the actual output when mixing color temperature.

[0066] Furthermore, the adjustment component 3 includes an adjustment resistor 301. The number of adjustment resistors 301 is matched with the number of light-emitting components 1 and they are connected in series in a one-to-one correspondence on the branch where each light-emitting component 1 is located. The resistance of the adjustment resistor 301 increases as the current increases.

[0067] By adopting the above technical solution, the adjustment component 3 becomes more reasonable. When multiple light-emitting components 1 establish a circuit with the driving power supply 100, if the current between the branches where each light-emitting component 1 is located is unbalanced, the resistance of the adjustment resistor 301 in the branch with increased current will increase, thereby limiting the current growth in that branch and forming negative feedback. Ultimately, the current between the branches where each light-emitting component 1 is located can be made consistent and can be dynamically adjusted in real time.

[0068] Furthermore, the regulating resistor 301 is a PTC thermistor, i.e., a positive temperature coefficient thermistor.

[0069] By adopting the above technical solution, the regulating resistor 301 is made more reasonable. The regulating resistor 301 is a PTC thermistor, which makes its resistance increase when the temperature rises. Therefore, the heating of the regulating resistor 301 in the branch with increased current increases, thereby increasing the resistance of the regulating resistor 301, thus limiting the current growth in the branch, forming negative feedback, and finally realizing that the current between the branches where the light-emitting components 1 are located tends to be consistent, and can be dynamically adjusted in real time.

[0070] Specifically, the parameters of each of the adjustable resistors 301 are the same.

[0071] 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.

[0072] 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.

[0073] 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. Specifically, the LED light-emitting unit 101 is an LED light-emitting diode.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] Furthermore, when each of the light-emitting components 1 corresponds to one of the switching units 201, each of the light-emitting components 1 is connected to the driving power supply 100 by connecting the corresponding regulating resistor 301 and the switching unit 201 in series.

[0078] When each of the light-emitting components 1 corresponds to two of the switching units 201, each of the light-emitting components 1 is connected to the driving power supply 100 through the two switching units 201 respectively, forming two parallel switching control loops 4, and one of the two switching control loops 4 is connected in series with the corresponding regulating resistor 301, while the other is not connected in series with the corresponding regulating resistor 301.

[0079] Using the above technical solution, when each of the light-emitting components 1 corresponds to one of the switching units 201, the regulating resistor 301 will participate regardless of whether a single light-emitting component 1 establishes a circuit with the driving power supply 100 or multiple light-emitting components 1 establish a circuit with the driving power supply 100.

[0080] When each of the light-emitting components 1 corresponds to two of the switching units 201, if a single light-emitting component 1 establishes a circuit with the driving power supply 100, the user can operate the switching unit 201 to establish a circuit with the driving power supply 100 through the switching control circuit 4 without connecting the corresponding regulating resistor 301 in series. If multiple light-emitting components 1 establish a circuit with the driving power supply 100, the user can operate the switching unit 201 to establish a circuit with the driving power supply 100 through the switching control circuit 4 with the corresponding regulating resistor 301 in series. This makes the switching components 2 more reasonable. Since there is no problem of uneven current distribution when a single light-emitting component 1 establishes a circuit with the driving power supply 100, there is no need to use the regulating resistor 301. The above structure can avoid unnecessary power loss.

[0081] Furthermore, when each of the light-emitting components 1 corresponds to two of the switching units 201, the two switching units 201 corresponding to each of the light-emitting components 1 are configured to be mutually exclusive, that is, only one of the two switching units 201 corresponding to each of the light-emitting components 1 is turned on at the same time.

[0082] By adopting the above technical solution, the switching unit 201 becomes more reasonable.

[0083] Furthermore, the switch assembly 2 adopts a multi-position switch, specifically, the switch assembly 2 adopts a multi-position toggle switch.

[0084] By adopting the above technical solution, the switch assembly 2 becomes more reasonable and easier for users to operate.

[0085] 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.

[0086] Two regulating resistors 301 are provided, namely a first regulating resistor 3011 and a second regulating resistor 3012;

[0087] The switch assembly 2 is a three-position switch;

[0088] The first pin 202 and the third pin 204 of the switch assembly 2 form a switch unit 201, the second pin 203 and the third pin 204 of the switch assembly 2 form a switch unit 201, the seventh pin 207 and the sixth pin 206 of the switch assembly 2 form a switch unit 201, and the fifth pin 205 and the sixth pin 206 of the switch assembly 2 form a switch unit 201; when the switch assembly 2 is in the first position, the first pin 202 and the third pin 204 of the switch assembly 2 are connected; when the switch assembly 2 is in the second position, the second pin 203 and the third pin 204 of the switch assembly 2 are connected, and the seventh pin 207 and the sixth pin 206 of the switch assembly 2 are connected; when the switch assembly 2 is in the third position, the fifth pin 205 and the sixth pin 206 of the switch assembly 2 are connected.

[0089] When the switch assembly 2 is disposed between the light-emitting component 1 and the positive terminal of the driving power supply 100, the third pin 204 and the sixth pin 206 of the switch assembly 2 are connected to the positive terminal of the driving power supply 100, the first pin 202 of the switch assembly 2 is connected to the positive terminal of the first light-emitting component 102, the second pin 203 of the switch assembly 2 is connected to the positive terminal of the first light-emitting component 102 and connected in series with the first regulating resistor 3011, the seventh pin 207 of the switch assembly 2 is connected to the positive terminal of the second light-emitting component 103 and connected in series with the second regulating resistor 3012, the fifth pin 205 of the switch assembly 2 is connected to the positive terminal of the second light-emitting component 103, and the negative terminals of the first light-emitting component 102 and the second light-emitting component 103 are connected to the negative terminal of the driving power supply 100.

[0090] When the switch assembly 2 is disposed between the light-emitting component 1 and the negative terminal of the driving power supply 100, the third pin 204 and the sixth pin 206 of the switch assembly 2 are connected to the negative terminal of the driving power supply 100, the first pin 202 of the switch assembly 2 is connected to the negative terminal of the first light-emitting component 102, the second pin 203 of the switch assembly 2 is connected to the negative terminal of the first light-emitting component 102 and is connected in series with the first regulating resistor 3011, the seventh pin 207 of the switch assembly 2 is connected to the negative terminal of the second light-emitting component 103 and is connected in series with the second regulating resistor 3012, the fifth pin 205 of the switch assembly 2 is connected to the negative terminal of the second light-emitting component 103, and the positive terminals of the first light-emitting component 102 and the second light-emitting component 103 are connected to the positive terminal of the driving power supply 100.

[0091] Specifically, the switch assembly 2 is a three-position switch of model SS23D13, with the first color temperature being 3000K and the second color temperature being 6000K.

[0092] By adopting the above technical solution, the light-emitting circuit becomes more reasonable;

[0093] When the switch assembly 2 is in the first position, the first light-emitting component 102 does not establish a circuit with the driving power supply 100 through the corresponding adjustment resistor 301. The first light-emitting component 102 works and emits light. At this time, the overall color temperature is the first color temperature, that is, the color temperature is 3000K.

[0094] When the switch assembly 2 is in the second position, the first light-emitting component 102 establishes a circuit with the driving power supply 100 through the corresponding adjustment resistor 301, and the second light-emitting component 103 establishes a circuit with the driving power supply 100 through the corresponding adjustment resistor 301. 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] When the switch assembly 2 is in the third position, the second light-emitting component 103 does not establish a circuit with the driving power supply 100 through the corresponding adjustment resistor 301. The second light-emitting component 103 works and emits light. At this time, the overall color temperature is the second color temperature, that is, a color temperature of 6000K.

[0096] A lighting fixture, comprising the aforementioned light-emitting circuit.

[0097] By adopting the above technical solutions, the lighting fixtures become more reasonable, which can reduce the degree of brightness unevenness or the deviation of the actual output when mixing color temperatures.

[0098] 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.

[0099] 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 an adjustment component (3), which is disposed between the light-emitting component (1) and the driving power supply (100) and is used to adjust the current amplitude flowing through the branch of each light-emitting component (1) to achieve the balance of current between the branches of each light-emitting component (1).

2. The light-emitting circuit according to claim 1, characterized in that: The adjustment component (3) includes an adjustment resistor (301). The number of adjustment resistors (301) is matched with the number of light-emitting components (1) and they are connected in series in a one-to-one correspondence on the branch where each light-emitting component (1) is located. The resistance of the adjustment resistor (301) increases as the current increases.

3. The light-emitting circuit according to claim 2, characterized in that: The regulating resistor (301) is a PTC thermistor.

4. The light-emitting circuit according to claim 1, characterized in that: 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.

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) 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.

7. The light-emitting circuit according to claim 6, characterized in that: When each of the light-emitting components (1) corresponds to one of the switching units (201), each of the light-emitting components (1) is connected to the driving power supply (100) by connecting the corresponding regulating resistor (301) and the switching unit (201) in series; When each of the light-emitting components (1) corresponds to two of the switching units (201), each of the light-emitting components (1) is connected to the driving power supply (100) through the two switching units (201) to form two parallel switching control loops (4). One of the two switching control loops (4) is connected in series with the corresponding regulating resistor (301), and the other is not connected in series with the corresponding regulating resistor (301).

8. The light-emitting circuit according to claim 7, characterized in that: The switch assembly (2) adopts a multi-position switch.

9. The light-emitting circuit according to claim 8, 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. Two regulating resistors (301) are provided, namely a first regulating resistor (3011) and a second regulating resistor (3012); The switch assembly (2) is a three-position switch; when the switch assembly (2) is in the first position, the first pin (202) and the third pin (204) of the switch assembly (2) are connected; when the switch assembly (2) is in the second position, the second pin (203) and the third pin (204) of the switch assembly (2) are connected, and the seventh pin (207) and the sixth pin (206) are connected; when the switch assembly (2) is in the third position, the fifth pin (205) and the sixth pin (206) of the switch assembly (2) are connected. When the switching assembly (2) is disposed between the light-emitting component (1) and the positive terminal of the driving power supply (100), the third pin (204) and the sixth pin (206) of the switching assembly (2) are connected to the positive terminal of the driving power supply (100), the first pin (202) of the switching assembly (2) is connected to the positive terminal of the first light-emitting component (102), the second pin (203) of the switching assembly (2) is connected to the positive terminal of the first light-emitting component (102) and connected in series with the first regulating resistor (3011), the seventh pin (207) of the switching assembly (2) is connected to the positive terminal of the second light-emitting component (103) and connected in series with the second regulating resistor (3012), the fifth pin (205) of the switching assembly (2) is connected to the positive terminal of the second light-emitting component (103), and the negative terminals of the first light-emitting component (102) and the second light-emitting component (103) are connected to the negative terminal of the driving power supply (100). When the switching assembly (2) is disposed between the light-emitting component (1) and the negative terminal of the driving power supply (100), the third pin (204) and the sixth pin (206) of the switching assembly (2) are connected to the negative terminal of the driving power supply (100), the first pin (202) of the switching assembly (2) is connected to the negative terminal of the first light-emitting component (102), the second pin (203) of the switching assembly (2) is connected to the negative terminal of the first light-emitting component (102) and connected in series with the first regulating resistor (3011), the seventh pin (207) of the switching assembly (2) is connected to the negative terminal of the second light-emitting component (103) and connected in series with the second regulating resistor (3012), the fifth pin (205) of the switching assembly (2) is connected to the negative terminal of the second light-emitting component (103), and the positive terminals of the first light-emitting component (102) and the second light-emitting component (103) are 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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