Double-switch connection sequence color temperature switching circuit of color temperature adjustable lamp with CCT

Abstract

The utility model discloses a double-switch sequence color temperature switching circuit of a color temperature adjustable lamp with a CCT, which comprises a wall switch capable of circularly switching color temperature and a color temperature sequence switching module, and the color temperature sequence switching module specifically comprises a fourteenth resistor, a fifteenth resistor, a self-resetting touch switch and a fifth capacitor. According to the utility model, the color temperature switching function is realized by connecting the self-resetting light touch switch to the chip detection pin, and the wall switch capable of circularly switching color temperature is combined, so that the wall switch and the self-resetting light touch switch can be linked, and therefore, the circuit can realize the double-switch color temperature switching function, and has the color temperature sequence connection function; the circuit can meet the actual use requirements of users, and has the advantages of simple circuit structure, flexible switching and low cost.

Description

Technical Field

[0001] The utility model relates to the field of lighting circuits, in particular to a double-switch sequential color temperature switching circuit for a CCT adjustable color temperature lamp. Background Art

[0002] At present, the color temperature control solutions for CCT adjustable color temperature lamps are relatively single in the industry, mainly including the following two control solutions.

[0003] First, control the color temperature through a wall switch. For example: for a lamp with three different color temperatures of 3000K, 4000K, and 5000K, the color temperature is switched by the "on" and "off" of the wall switch. The color temperature first switches from 3000K to 4000K, then from 4000K to 5000K, and finally from 5000K to 3000K, and so on in a cycle until the desired color temperature is switched.

[0004] Second, mechanically control the color temperature through a toggle switch on the lamp board. For example: for a lamp with three different color temperatures of 3000K, 4000K, and 5000K, the color temperature is switched by the "on" and "off" of the toggle switch on the lamp board. The color temperature first switches from 3000K to 4000K, then from 4000K to 5000K, and finally from 5000K to 3000K, and so on in a cycle until the desired color temperature is switched.

[0005] In the process of implementing the double-switch sequential color temperature switching circuit for a CCT adjustable color temperature lamp in the embodiment of the present utility model by the inventor of this patent, at least the following technical problems in the prior art are found:

[0006] The above two color temperature control solutions are isolated from each other and cannot effectively control the color temperature synchronously. For example: for a lamp with three different color temperatures of 3000K, 4000K, and 5000K, when the color temperature needs to be switched to 5000K, assuming that the color temperature has been switched to 4000K through the wall switch, when switching the color temperature through the toggle switch later, the lamp cannot directly switch from 4000K to 5000K, and still needs the toggle switch to first switch the color temperature from 3000K to 4000K, and then from 4000K to the target color temperature of 5000K.

[0007] In summary, the existing wall switch and toggle switch cannot effectively control the color temperature synchronously and cannot meet the actual use requirements of users. Summary of the Utility Model

[0008] The embodiment of the present utility model provides a double-switch sequential color temperature switching circuit for a CCT adjustable color temperature lamp, which solves the problem that the existing wall switch and toggle switch cannot effectively control the color temperature synchronously and cannot meet the actual use requirements of users.

[0009] An embodiment of the present utility model provides a dual-switch sequential color temperature switching circuit for a CCT tunable color temperature lamp, including a wall switch capable of cyclically switching the color temperature and a color temperature sequential switching module. The color temperature sequential switching module specifically includes:

[0010] A fourteenth resistor, whose first end is electrically connected to the input voltage and whose second end is electrically connected to the chip detection pin;

[0011] A fifteenth resistor, whose first end is electrically connected to the chip detection pin and the second end of the fourteenth resistor;

[0012] A self-resetting tactile switch, whose first end is electrically connected to the second end of the fifteenth resistor and whose second end is electrically connected to the chip signal ground;

[0013] A fifth capacitor, whose first end is electrically connected to the chip detection pin and the second end of the fourteenth resistor and whose second end is electrically connected to the chip signal ground;

[0014] When the dual-switch sequential color temperature switching circuit system is powered on, the self-resetting tactile switch is in the default off state, and the fourteenth resistor and the fifth capacitor continuously supply a high level to the chip detection pin. Through the wall switch, the operation of cyclically switching the color temperature can be performed;

[0015] When the self-resetting tactile switch is manually turned on, the current passes through the fourteenth resistor, the fifteenth resistor, and the self-resetting tactile switch and is connected to the chip signal ground, and the chip detection pin is at a low level, stopping the color temperature switching operation;

[0016] When the self-resetting tactile switch self-resets and disconnects, the fourteenth resistor and the fifth capacitor supply a high level to the chip detection pin again, and the color temperature sequential switching operation starts to switch the current color temperature to the next color temperature.

[0017] Optionally, the dual-switch sequential color temperature switching circuit further includes: a control module, whose chip detection pin is electrically connected to the color temperature sequential switching module.

[0018] Optionally, the control module includes a control chip with a built-in color temperature switching output channel function.

[0019] Optionally, the control chip is specifically a control chip with a built-in three-color temperature switching output channel function.

[0020] Optionally, the control chip and the wall switch are integrated together.

[0021] Optionally, the dual-switch sequential color temperature switching circuit further includes: a rectification module, whose output end is electrically connected to the color temperature sequential switching module.

[0022] Optionally, the dual-switch sequential color temperature switching circuit further includes: a circuit adjustment module, whose first end is electrically connected to the output end of the rectification module, and whose second end is electrically connected to the control module.

[0023] Optionally, the dual-switch sequential color temperature switching circuit further includes: an adjustable color temperature module, whose first end is electrically connected to the circuit adjustment module and the control module, and whose second end is connected to the chip signal ground.

[0024] Optionally, the dual-switch sequential color temperature switching circuit further includes: a power module, which is electrically connected to the rectification module, the circuit adjustment module, and the adjustable color temperature module.

[0025] Optionally, the power module includes a power chip.

[0026] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0027] In the present invention, the color temperature switching function is realized by connecting a self-resetting tactile switch to the chip detection pin. At the same time, in combination with a wall switch that can cyclically switch the color temperature, the wall switch and the self-resetting tactile switch are linked, so that the circuit realizes the dual-switch color temperature switching function and has the color temperature sequencing function, which can meet the actual use needs of users. Among them, the color temperature sequencing function specifically means that in the scenario of dual-switch color temperature switching, after the color temperature is switched to the current color temperature through the wall switch, the current color temperature can be sequentially switched to the next color temperature through the self-resetting tactile switch, sequentially connecting the next color temperature switching operation of the wall switch. For example, for a lamp with three different color temperatures of 3000K, 4000K, and 5000K, when it is necessary to switch the color temperature to 5000K, assuming that the color temperature has been switched to 4000K through the wall switch, when the color temperature is switched through the self-resetting tactile switch later, the lamp can directly switch from 4000K to 5000K, without first switching the color temperature from 3000K to 4000K and then from 4000K to the target color temperature of 5000K. The fourteenth resistor and the fifth capacitor of the present invention are the resistor and capacitor for supplying power to the chip detection pin respectively. The self-resetting tactile switch is the core device, and the fifteenth resistor is used to protect the self-resetting tactile switch, which has the advantages of simple circuit structure, flexible switching, and low cost. Description of the Drawings

[0028] Figure 1 It is the electrical schematic diagram of a dual-switch sequential color temperature switching circuit for a CCT adjustable color temperature lamp in an embodiment of the present invention;

[0029] Figure 2 It is the electrical schematic diagram of the color temperature sequential switching module in an embodiment of the present invention;

[0030] Figure 3 It is the electrical schematic diagram of the control module in an embodiment of the present utility model;

[0031] Figure 4 It is the electrical schematic diagram of the rectification module in an embodiment of the present utility model;

[0032] Figure 5 It is the electrical schematic diagram of the circuit adjustment module in an embodiment of the present utility model;

[0033] Figure 6 It is the electrical schematic diagram of the adjustable color temperature module in an embodiment of the present utility model;

[0034] Figure 7 It is the electrical schematic diagram of the power module in an embodiment of the present utility model;

[0035] In the figure:

[0036] RX1, the first wire-wound resistor;

[0037] RX2, the second wire-wound resistor;

[0038] TVR2, the second varistor;

[0039] CX1, the safety capacitor;

[0040] BD1, the rectifier bridge;

[0041] R4, the fourth resistor;

[0042] R14, the fourteenth resistor;

[0043] R15, the fifteenth resistor;

[0044] KEY1, the self-resetting tactile switch;

[0045] C5, the fifth capacitor;

[0046] ZD1, the first zener diode;

[0047] C4, the fourth capacitor;

[0048] C3, the third capacitor;

[0049] U2, the control chip;

[0050] SGND, the chip signal ground;

[0051] D1, the first diode;

[0052] R12, the twelfth resistor;

[0053] R11, the eleventh resistor;

[0054] R16, the sixteenth resistor;

[0055] R17, the seventeenth resistor;

[0056] R18, the eighteenth resistor;

[0057] R2, the second resistor;

[0058] R3, the third resistor;

[0059] D4, the first color temperature light-emitting diode;

[0060] D5, the second color temperature light-emitting diode;

[0061] RD1, the first micro-variable resistor;

[0062] RD2, the second micro-variable resistor;

[0063] D2, the second diode;

[0064] D3, the third diode;

[0065] RD3, the third micro-variable resistor;

[0066] RD4, the fourth micro-variable resistor;

[0067] Q2, the second control MOS transistor;

[0068] Q3, the third control MOS transistor;

[0069] Q4, the fourth control MOS transistor;

[0070] RG2, the second pull-down resistor;

[0071] RG3, the third pull-down resistor;

[0072] RG4, the fourth pull-down resistor;

[0073] EC1, the electrolytic capacitor;

[0074] R9, the ninth resistor;

[0075] TVR1, the first varistor;

[0076] R5, the fifth resistor;

[0077] C2, the second capacitor;

[0078] C1, the first capacitor;

[0079] U1, the power chip;

[0080] RS1, the current detection resistor;

[0081] R7, the seventh resistor;

[0082] R8, the eighth resistor;

[0083] C8, the eighth capacitor;

[0084] Q1, the power MOS transistor;

[0085] TVR3, the third varistor;

[0086] RG1, the first pull - down resistor;

[0087] R6, the sixth resistor;

[0088] R6A, the sixth - numbered resistor. Detailed implementation manners

[0089] An embodiment of the present utility model provides a dual - switch sequence - switching color temperature circuit for a CCT - adjustable color temperature lamp, which solves the problem that the existing wall switch and toggle switch cannot effectively control the color temperature synchronously and cannot meet the actual use requirements of users.

[0090] First, the terms appearing in the specification will be explained respectively.

[0091] 1. Color temperature

[0092] Color temperature is a measurement unit representing the color components contained in light, usually measured in K (Kelvin). It is defined based on the principle that a fictional black object emits different colors of light when heated to different temperatures.

[0093] Color temperature is used to describe the "warm - cold" feeling of a light source. Lower color temperatures (such as 2700K - 3000K) present warm tones, such as red, orange, and yellow, and are often used to create a warm and comfortable atmosphere; higher color temperatures (such as 5000K - 6500K) present cold tones, such as white and blue, and are suitable for places that require bright and clear lighting.

[0094] When selecting lighting products, choose the appropriate color temperature according to the usage scenario and the atmosphere to be created. For example, low - color - temperature lights are often selected for the living room and bedroom at home, while high - color - temperature lights are more preferred for offices and libraries.

[0095] 2. CCT lamp

[0096] A CCT (Correlated Color Temperature) lamp refers to a lighting device that can emit light with a specific color temperature. For electro-luminescent light sources such as LEDs and high-intensity gas discharge light sources, their spectral characteristics may not fully conform to the characteristics of blackbody radiation. Therefore, the concept of correlated color temperature is introduced. That is, when the chromaticity point of the light source is not on the blackbody locus but is closest to the chromaticity of a blackbody at a certain temperature, the color temperature of the light source is called the correlated color temperature.

[0097] The range of CCT usually ranges from about 2700K (warm tone) to about 6500K (cold tone). Among them, the color temperature between 2700K and 3000K is considered to be a relatively comfortable and natural color temperature.

[0098] In commercial applications, white LED manufacturers usually classify the output of white LEDs into categories such as "warm white" (2600 to 3700 K CCT), "neutral white" (3700 to 5000 K CCT), and "cold white" (5000 to 8300 K CCT) to meet the needs of different markets and consumers.

[0099] To better understand a dual-switch sequential color temperature switching circuit for a CCT adjustable color temperature lamp provided by the present utility model, the above dual-switch sequential color temperature switching circuit will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments. Obviously, the embodiments described in the present utility model are part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0100] Please refer to Figure 1 and Figure 2 A dual-switch sequential color temperature switching circuit for a CCT adjustable color temperature lamp provided by the present utility model includes a wall switch capable of cyclically switching the color temperature, a rectification module, a color temperature sequential switching module, a control module, a circuit adjustment module, an adjustable color temperature module, and a power module. The color temperature sequential switching module can link the wall switch and the self-resetting touch switch KEY1, so that the circuit realizes the dual-switch color temperature switching function and has the color temperature sequential function, which can meet the actual use needs of users. Next, each component module will be introduced one by one.

[0101] (1) Color temperature sequential switching module

[0102] Please refer to both Figure 1 and Figure 2, the color temperature sequential switching module includes a fourteenth resistor R14, a fifteenth resistor R15, a self - reset tactile switch KEY1, and a fifth capacitor C5. Among them, the fourteenth resistor R14 and the fifth capacitor C5 are the resistor and capacitor for supplying power to the chip detection pin respectively. The self - reset tactile switch KEY1 is the core device, and the fifteenth resistor R15 is used to protect the self - reset tactile switch KEY1.

[0103] For the fourteenth resistor R14, its first end is electrically connected to the input voltage, and its second end is electrically connected to the chip detection pin.

[0104] For the fifteenth resistor R15, its first end is electrically connected to the chip detection pin and the second end of the fourteenth resistor R14.

[0105] For the self - reset tactile switch KEY1, its first end is electrically connected to the second end of the fifteenth resistor R15, and its second end is electrically connected to the chip signal ground SGND.

[0106] For the fifth capacitor C5, its first end is electrically connected to the chip detection pin and the second end of the fourteenth resistor R14, and its second end is electrically connected to the chip signal ground SGND.

[0107] Operating condition of the color temperature sequential switching module:

[0108] When the dual - switch sequential color temperature switching circuit system is powered on, the self - reset tactile switch KEY1 is in the default off state. The fourteenth resistor R14 and the fifth capacitor C5 continuously supply a high level to the chip detection pin. Through the wall switch, the operation of cycling through the color temperatures can be performed;

[0109] When the self - reset tactile switch KEY1 is manually turned on, the current passes through the fourteenth resistor R14, the fifteenth resistor R15, and the self - reset tactile switch KEY1 and is connected to the chip signal ground SGND. The chip detection pin is at a low level, and the color temperature switching operation stops;

[0110] After the self - reset touch switch KEY1 is self - reset and disconnected, the fourteenth resistor R14 and the fifth capacitor C5 supply a high level to the chip detection pin again, and the color temperature sequential switching operation starts to switch the current color temperature to the next color temperature. The color temperature sequential function specifically means that in the scenario of switching the color temperature with a dual - switch, after the color temperature is switched to the current color temperature through the wall switch, the current color temperature can be sequentially switched to the next color temperature through the self - reset touch switch KEY1, sequentially connecting the next color temperature switching operation of the wall switch. For example, for a lamp with three different color temperatures of 3000K, 4000K, and 5000K, when the color temperature needs to be switched to 5000K, assuming that the color temperature has been switched to 4000K through the wall switch, when the color temperature is switched through the self - reset touch switch KEY1 subsequently, the lamp can directly switch from 4000K to 5000K, without first switching the color temperature from 3000K to 4000K and then from 4000K to the target color temperature of 5000K.

[0111] Continuing with the previous embodiment, the working process of the color temperature sequential switching module is as follows: for example, through the wall switch, the three - color temperature cycle switching of 3000K, 4000K, and 5000K can be achieved; keeping the circuit powered on, making the chip detection pin at a high level through the self - reset touch switch KEY1 can also achieve the three - color temperature cycle switching of 3000K, 4000K, and 5000K. When the lamp is normally powered, due to the built - in off - state of the self - reset touch switch KEY1 itself, the fourteenth resistor R14 and the fifth capacitor C5 continuously bring a high - level signal to the chip detection pin, and the lamp works normally; when the self - reset touch switch KEY1 is manually pressed, the self - reset touch switch KEY1 conducts, and the current sequentially passes through the fourteenth resistor R14, the fifteenth resistor R15, and the self - reset touch switch KEY1 and connects to the chip signal ground SGND, while also pulling down the level of the chip detection pin. At this time, the level of the chip detection pin is nearly 0, and the entire lamp goes out; when the self - reset touch switch KEY1 is released, due to the self - reset function of the self - reset touch switch KEY1, the self - reset touch switch KEY1 disconnects, and the fourteenth resistor R14 and the fifth capacitor C5 supply power to the chip detection pin again. The chip detection pin obtains a high level, and the entire lamp lights up. Moreover, for each on - off touch of the self - reset switch, a sequential color temperature switching can be achieved, that is, switching from the current color temperature to the next color temperature, and so on in a cycle.

[0112] (2) Control module

[0113] Please also refer to Figure 1 and Figure 3 , the control module, whose chip detection pin is electrically connected to the color temperature sequential switching module.

[0114] The control module includes a control chip U2, a first voltage stabilizing diode ZD1, a fourth capacitor C4, and a third capacitor C3. The first end of the first voltage stabilizing diode ZD1 is electrically connected to the VCC pin of the control chip U2. The first end of the fourth capacitor C4 is electrically connected to the VCC pin of the control chip U2. The first end of the third capacitor C3 is electrically connected to the VDD pin of the control chip U2. The second ends of the first voltage stabilizing diode ZD1, the fourth capacitor C4, and the third capacitor C3 are connected to the chip signal ground SGND. The VCC pin of the control chip U2 is electrically connected to the first ends of the twelfth resistor R12, the sixteenth resistor R16, the seventeenth resistor R17, and the eighteenth resistor R18 in the circuit adjustment module. The CLK pin of the control chip U2 is a chip detection pin and is electrically connected to the color temperature sequence switching module. The GND pin of the control chip U2 is connected to the chip signal ground SGND. The D1 pin of the control chip U2 is electrically connected to the second end of the sixteenth resistor R16 in the circuit adjustment module and the gate of the second control MOS transistor Q2 in the adjustable color temperature module. The D2 pin of the control chip U2 is electrically connected to the second end of the seventeenth resistor R17 in the circuit adjustment module and the gate of the third control MOS transistor Q3 in the adjustable color temperature module. The D3 pin of the control chip U2 is electrically connected to the second end of the eighteenth resistor R18 in the circuit adjustment module and the gate of the fourth control MOS transistor Q4 in the adjustable color temperature module.

[0115] It should be noted that the control chip U2 can be replaced by a circuit structure with the same function, and the chip or circuit structure can be selected according to actual needs, and the present utility model is not limited thereto.

[0116] It should be noted that the control chip U2 is specifically a control chip with the function of three built-in color temperature switching output channels. Of course, in specific applications, specific color temperature values can be set according to actual needs, such as: 3000K, 4000K, 5000K, or 2700K, 5000K, 6500K, etc., and the present utility model is not limited thereto.

[0117] It should be noted that the control chip U2 and the wall switch can be designed as a split type or an integrated type, that is, the control chip U2 and the wall switch are integrated together, and the present utility model is not limited thereto.

[0118] (3) Rectification module

[0119] Please refer to Figure 1 and Figure 4 for the rectification module, whose output end is electrically connected to the color temperature sequence switching module.

[0120] The rectification module includes a first wire-wound resistor RX1, a second wire-wound resistor RX2, a second varistor TVR2, a safety capacitor CX1, a rectifier bridge BD1, and a fourth resistor R4. The first wire-wound resistor RX1 is electrically connected to the first input terminal of the rectifier bridge BD1, the second wire-wound resistor RX2 is electrically connected to the second input terminal of the rectifier bridge BD1, the second varistor TVR2 and the safety capacitor CX1 are connected in parallel to form a parallel circuit. The second end of the first wire-wound resistor RX1 is connected to the second end of the second wire-wound resistor RX2 through the parallel circuit. The first output terminal of the rectifier bridge BD1 is electrically connected to the circuit adjustment module and the color temperature sequence switching module. The first output terminal of the rectifier bridge BD1 is electrically connected to the power module through the fourth resistor R4. The second output terminal of the rectifier bridge BD1 is grounded.

[0121] (4) Circuit adjustment module

[0122] Please also refer to Figure 1 and Figure 5 , the circuit adjustment module, its first end is electrically connected to the output terminal of the rectification module, and its second end is electrically connected to the control module.

[0123] The circuit adjustment module includes a first diode D1, a twelfth resistor R12, an eleventh resistor R11, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a second resistor R2, and a third resistor R3.

[0124] The first ends of the first diode D1 and the third resistor R3 are electrically connected to the rectification module. The second end of the first diode D1 is electrically connected to the adjustable color temperature module. The second end of the third resistor R3 is electrically connected to the CS pin in the power module. The first end of the second resistor R2 is electrically connected to the second end of the first diode D1. The second end of the second resistor R2 is electrically connected to the VIN pin of the power module. The first ends of the twelfth resistor R12, the sixteenth resistor R16, the seventeenth resistor R17, and the eighteenth resistor R18 are electrically connected together. The second end of the twelfth resistor R12 is connected to the first end of the eleventh resistor R11. The second end of the eleventh resistor R11 is connected to the second end of the first diode D1. The second end of the sixteenth resistor R16 is connected to the D1 pin of the control module. The second end of the sixteenth resistor R16 is electrically connected to the gate of the second control MOS transistor Q2 in the adjustable color temperature module. The second end of the seventeenth resistor R17 is connected to the D2 pin of the control module. The second end of the seventeenth resistor R17 is electrically connected to the gate of the third control MOS transistor Q3 in the adjustable color temperature module. The second end of the eighteenth resistor R18 is connected to the D3 pin of the control module. The second end of the eighteenth resistor R18 is electrically connected to the gate of the fourth control MOS transistor Q4 in the adjustable color temperature module.

[0125] (5) Adjustable color temperature module

[0126] Please refer to Figure 1 and Figure 6 at the same time. The adjustable color temperature module has its first end electrically connected to the circuit adjustment module and the control module, and its second end connected to the chip signal ground SGND.

[0127] The adjustable color temperature module includes a first color temperature light-emitting diode D4, a second color temperature light-emitting diode D5, a first micro-variable resistor RD1, a second micro-variable resistor RD2, a second diode D2, a third micro-variable resistor RD3, a fourth micro-variable resistor RD4, a third diode D3, a second control MOS transistor Q2, a third control MOS transistor Q3, a fourth control MOS transistor Q4, a second pull-down resistor RG2, a third pull-down resistor RG3, a fourth pull-down resistor RG4, an electrolytic capacitor EC1, a ninth resistor R9, and a first varistor TVR1.

[0128] The first ends of the first color temperature light-emitting diode D4, the second color temperature light-emitting diode D5, the electrolytic capacitor EC1, the ninth resistor R9, and the first varistor TVR1 are electrically connected together. The second end of the electrolytic capacitor EC1 is electrically connected to the power module. The second end of the ninth resistor R9 is electrically connected to the power module. The second end of the first varistor TVR1 is grounded. The second end of the first color temperature light-emitting diode D4 is connected in series with the first end of the second diode D2 after passing through the parallel circuit formed by the first micro-variable resistor RD1 and the second micro-variable resistor RD2. The second end of the second color temperature light-emitting diode D5 is connected in series with the first end of the third diode D3 after passing through the parallel circuit formed by the third micro-variable resistor RD3 and the fourth micro-variable resistor RD4. The second ends of the second diode D2 and the third diode D3 are electrically connected to the drain of the third control MOS transistor Q3. The gate of the third control MOS transistor Q3 is electrically connected to the control module and the circuit adjustment module. The gate of the third control MOS transistor Q3 is electrically connected to the power module through the third pull-down resistor RG3. The source of the third control MOS transistor Q3 is electrically connected to the power module. The drain of the second control MOS transistor Q2 is electrically connected to the first end of the parallel circuit formed by the first micro-variable resistor RD1 and the second micro-variable resistor RD2. The gate of the second control MOS transistor Q2 is electrically connected to the control module and the circuit adjustment module. The gate of the second control MOS transistor Q2 is electrically connected to the power module through the second pull-down resistor RG2. The source of the second control MOS transistor Q2 is electrically connected to the power module. The drain of the fourth control MOS transistor Q4 is electrically connected to the first end of the parallel circuit formed by the third micro-variable resistor RD3 and the fourth micro-variable resistor RD4. The gate of the fourth control MOS transistor Q4 is electrically connected to the control module and the circuit adjustment module. The gate of the fourth control MOS transistor Q4 is electrically connected to the power module through the fourth pull-down resistor RG4. The source of the fourth control MOS transistor Q4 is electrically connected to the power module.

[0129] (6) Power Module

[0130] Please also refer to Figure 1 and Figure 7 , the power module is electrically connected to the rectification module, the circuit adjustment module, and the adjustable color temperature module.

[0131] The power module includes a power chip U1, a fifth resistor R5, a second capacitor C2, a first capacitor C1, a current detection resistor RS1, a seventh resistor R7, an eighth resistor R8, an eighth capacitor C8, a first pull-down resistor RG1, a power MOS transistor Q1, a third varistor TVR3, a sixth resistor R6, and a sixth resistor R6A. It should be noted that the power chip U1 can be replaced by a circuit structure with the same function, and the chip or circuit structure can be selected according to actual needs, and the present invention is not limited thereto.

[0132] Among them, the seventh resistor R7, the eighth resistor R8, the eighth capacitor C8, the power MOS transistor Q1, the third varistor TVR3, the first pull-down resistor RG1, the sixth resistor R6, and the sixth resistor R6A form a power loop. The first ends of the seventh resistor R7, the eighth resistor R8, and the eighth capacitor C8 are electrically connected together. The second end of the seventh resistor R7 is electrically connected to the adjustable color temperature module, the second end of the seventh resistor R7 is grounded through the third varistor TVR3, the second end of the seventh resistor R7 is electrically connected to the drain of the power MOS transistor Q1, the source of the power MOS transistor Q1 is electrically connected to its drain through a zener diode, the source of the power MOS transistor Q1 is grounded through the sixth resistor R6, the gate of the power MOS transistor Q1 is grounded through the first pull-down resistor RG1, and the second ends of the eighth resistor R8 and the eighth capacitor C8 are grounded through the sixth resistor R6A.

[0133] The VCC pin of the power chip U1 is grounded through the first capacitor C1, the GND pin of the power chip U1 is grounded, the SET pin of the power chip U1 is electrically connected to the first ends of the seventh resistor R7, the eighth resistor R8, and the eighth capacitor C8 in the power loop through the current detection resistor RS1, the GATE pin of the power chip U1 is electrically connected to the gate of the power MOS transistor Q1 in the power loop, the VIN pin of the power chip U1 is electrically connected to the second end of the second resistor R2 in the circuit adjustment module, and the CS pin of the power chip U1 is electrically connected to the second end of the third resistor R3 in the circuit adjustment module; the DIM pin of the power chip U1 is electrically connected to the first output end of the rectification module through the fourth resistor R4, and the DIM pin of the power chip U1 is grounded through a loop formed by the parallel connection of the fifth resistor R5 and the second capacitor C2.

[0134] Obviously, those skilled in the art can make various modifications and variations to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these modifications and variations.

Claims

1. A dual-switch sequential color temperature switching circuit for a CCT-adjustable color temperature lamp, characterized in that, It includes a wall switch capable of cyclically switching color temperature and a color temperature sequential switching module. Specifically, the color temperature sequential switching module includes: A fourteenth resistor, with its first end electrically connected to the input voltage and its second end electrically connected to the chip detection pin. A fifteenth resistor, with its first end electrically connected to the chip detection pin and the second end of the fourteenth resistor. A self-resetting tactile switch, with its first end electrically connected to the second end of the fifteenth resistor and its second end electrically connected to the chip signal ground. A fifth capacitor, with its first end electrically connected to the chip detection pin and the second end of the fourteenth resistor and its second end electrically connected to the chip signal ground. After the dual-switch sequential color temperature switching circuit system is powered on, the self-resetting tactile switch is in the default off state. The fourteenth resistor and the fifth capacitor continuously supply a high level to the chip detection pin. Through the wall switch, the operation of cyclically switching color temperature can be executed. When the self-resetting tactile switch is manually turned on, the current passes through the fourteenth resistor, the fifteenth resistor, and the self-resetting tactile switch and is connected to the chip signal ground. The chip detection pin is at a low level, and the color temperature switching operation stops. When the self-resetting tactile switch self-resets and disconnects, the fourteenth resistor and the fifth capacitor supply a high level to the chip detection pin again, and the color temperature sequential switching operation starts to switch the current color temperature to the next color temperature.

2. The dual-switch sequence-switching color temperature circuit according to claim 1, wherein The dual-switch sequential color temperature switching circuit further includes: a control module, whose chip detection pin is electrically connected to the color temperature sequential switching module.

3. The dual-switch sequential switching color temperature circuit according to claim 2, wherein The control module includes a control chip with a built-in color temperature switching output channel function.

4. The dual-switch sequential switching color temperature circuit according to claim 3, wherein Specifically, the control chip is a control chip with three built-in color temperature switching output channel functions.

5. The dual-switch sequential switching color temperature circuit according to claim 3, wherein The control chip and the wall switch are integrated together.

6. The dual-switch sequential switching color temperature circuit according to claim 2, wherein The dual-switch sequential color temperature switching circuit further includes: a rectification module, whose output end is electrically connected to the color temperature sequential switching module.

7. The dual-switch sequence-switching color temperature circuit according to claim 6, wherein The dual-switch sequential color temperature switching circuit further includes: a circuit adjustment module, with its first end electrically connected to the output end of the rectification module and its second end electrically connected to the control module.

8. The dual-switch sequential switching color temperature circuit according to claim 7, wherein The dual-switch sequential color temperature switching circuit further includes: an adjustable color temperature module, with its first end electrically connected to the circuit adjustment module and the control module and its second end connected to the chip signal ground.

9. The dual-switch sequence-switching color temperature circuit according to claim 8, wherein The dual-switch sequential color temperature switching circuit further includes: a power module, electrically connected to the rectification module, the circuit adjustment module, and the adjustable color temperature module.

10. The dual-switch sequential switching color temperature circuit according to claim 9, wherein, The power module includes a power chip.

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