Illumination driver and lamp

Abstract

The utility model discloses an illumination driver and a lamp, and belongs to the technical field of LED illumination. The lighting driver comprises a control unit, a sensing unit wiring port used for being externally connected with a sensing unit, a first power supply, a first control sub-circuit and a second control sub-circuit. A control unit of the lighting driver and the lamp correspondingly controls the opening proportion of the first color temperature LED group and the opening proportion of the second color temperature LED group according to environment parameters input by a sensing unit and the corresponding relation between preset environment parameters and the opening proportion of the first color temperature LED group and the opening proportion of the second color temperature LED group. Therefore, the color temperature of the LED lamp automatically changes along with the change of the external environment. Furthermore, the control circuit of the opening and closing time of the first color temperature LED group and the second color temperature LED group is realized by adopting discrete switch elements, so that the circuit is simple and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of LED lighting technology, specifically to a lighting driver and a lamp. Background Technology

[0002] With the development of LED street light technology, the environmental conditions in practical applications have placed higher demands on the color temperature of the luminaires. Existing luminaires have fixed and singular color-changing modes, requiring manual adjustment of the color temperature. They cannot achieve automatic color temperature changes in response to changes in the external environment. Therefore, there is an urgent need for a driving solution that can automatically adjust the color temperature of LED luminaires according to changes in the external environment. Utility Model Content

[0003] In view of this, the purpose of this utility model embodiment is to provide a lighting driver and lamp to at least partially solve the technical problem that the color temperature of current LED lamps cannot automatically change with changes in the external environment.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0005] According to one aspect of the present invention, a lighting driver is provided, the lighting driver including a control unit, a sensing unit wiring port for connecting an external sensing unit, a first power supply, a first control sub-circuit, and a second control sub-circuit;

[0006] The control unit is electrically connected to the first power supply and the external first color temperature LED group and second color temperature LED group respectively, and is used to convert the first power supply into dual DC power supply and output it to the first color temperature LED group and the second color temperature LED group respectively.

[0007] The sensing unit's wiring port is electrically connected to the control unit. It is used to sense environmental parameters of the surrounding environment through the external sensing unit and output the environmental parameters to the control unit. The control unit then controls the opening and closing of the first color temperature LED group and the second color temperature LED group according to the environmental parameters and the corresponding relationship between the preset environmental parameters and the opening ratio of the first color temperature LED group and the second color temperature LED group.

[0008] The first control sub-circuit is electrically connected to the control unit and the first color temperature LED group respectively, and includes multiple discrete switching elements for adjusting the on and off time of the first color temperature LED group according to the control of the control unit;

[0009] The second control sub-circuit is electrically connected to the control unit and the second color temperature LED group, and includes multiple discrete switching elements for adjusting the on and off times of the second color temperature LED group according to the control of the control unit.

[0010] Optionally, the first control sub-circuit includes a first switching element, a second switching element, and a fifth switching element. The control terminals of the first and fifth switching elements are electrically connected to the control unit, and their output terminals are electrically connected to the control terminal of the second switching element. The output terminal of the second switching element is electrically connected to an external first color temperature LED group.

[0011] The second control sub-circuit includes a third switch element, a fourth switch element, and a sixth switch element. The control terminals of the third and sixth switch elements are electrically connected to the control unit, and their output terminals are electrically connected to the control terminal of the fourth switch element. The output terminal of the fourth switch element is electrically connected to the external second color temperature LED group.

[0012] Optionally, the first switching element includes a first transistor, the second switching element includes a first NMOS transistor, and the fifth switching element includes a second transistor. The first control sub-circuit further includes a first current-limiting resistor and a second current-limiting resistor. The base of the first transistor is electrically connected to the first control terminal of the control unit through the first current-limiting resistor, the collector is connected to the second power supply, and the emitter is electrically connected to the gate of the first NMOS transistor through the second current-limiting resistor. The drain of the first NMOS transistor is electrically connected to the negative power supply of the first color temperature LED group, and the source is grounded. The base of the second transistor is electrically connected to the first control terminal of the control unit through the first current-limiting resistor, the emitter is electrically connected to the emitter of the first transistor, and the collector is grounded.

[0013] Optionally, the first control sub-circuit further includes a first diode and a third current-limiting resistor. The positive terminal of the first diode is electrically connected to the gate of the first NMOS transistor, and the negative terminal is electrically connected to one end of the third current-limiting resistor. The other end of the third current-limiting resistor is electrically connected to the emitter of the second transistor.

[0014] Optionally, the third switching element includes a third transistor, the fourth switching element includes a second NMOS transistor, and the sixth switching element includes a fourth transistor. The second control sub-circuit further includes a fourth current-limiting resistor and a fifth current-limiting resistor. The base of the third transistor is electrically connected to the second control terminal of the control unit through the fourth current-limiting resistor, the collector is connected to the second power supply, and the emitter is electrically connected to the gate of the second NMOS transistor through the fifth current-limiting resistor. The drain of the second NMOS transistor is electrically connected to the negative power supply of the second color temperature LED group, and the source is grounded. The base of the fourth transistor is electrically connected to the second control terminal of the control unit through the fourth current-limiting resistor, the emitter is electrically connected to the emitter of the third transistor, and the collector is grounded.

[0015] Optionally, the second control sub-circuit further includes a second diode and a sixth current-limiting resistor. The positive terminal of the second diode is electrically connected to the gate of the second NMOS transistor, and the negative terminal is electrically connected to one end of the sixth current-limiting resistor. The other end of the sixth current-limiting resistor is electrically connected to the emitter of the fourth transistor.

[0016] Optionally, the sensing unit wiring port is located at the outer end of the lighting driver, and the sensing unit is detachably connected to the sensing unit wiring port.

[0017] Optionally, the sensing unit wiring port includes a first wiring port and a second wiring port, and the first wiring port and the second wiring port are electrically connected to the control unit, respectively.

[0018] Optionally, the sensing unit includes an ambient temperature sensing module and an ambient temperature sensing verification module, wherein the ambient temperature sensing module is connected to a first wiring port and the ambient temperature sensing verification module is connected to a second wiring port.

[0019] Optionally, the sensing unit includes a visibility sensing module, which is connected between the first wiring port and the second wiring port.

[0020] According to another aspect of the present invention, a lamp is provided that includes the above-described lighting driver.

[0021] The lighting driver and lamp provided in this embodiment include a control unit, a sensing unit wiring port for connecting an external sensing unit, a first power supply, a first control sub-circuit, and a second control sub-circuit. The control unit is electrically connected to the first power supply and an external first color temperature LED group and second color temperature LED group, respectively, and is used to convert the first power supply into a dual-channel DC power supply and output it to the first color temperature LED group and the second color temperature LED group. The sensing unit wiring port is electrically connected to the control unit and is used to sense environmental parameters of the surrounding environment through the external sensing unit and output the environmental parameters to the control unit. The control unit then controls the opening and closing of the first and second color temperature LED groups according to the environmental parameters and a preset correspondence between the environmental parameters and the opening ratios of the first and second color temperature LED groups. The first control sub-circuit is electrically connected to the control unit and the first color temperature LED group, and includes multiple discrete switching elements, used to adjust the opening and closing time of the first color temperature LED group according to the control unit's control. The second control sub-circuit is also electrically connected to the control unit and the second color temperature LED group, and includes multiple discrete switching elements, used to adjust the opening and closing time of the second color temperature LED group according to the control unit's control. The control unit of the lighting driver and luminaire controls the on-state ratios of the first and second color temperature LED groups according to the correspondence between the environmental parameters input from the sensing unit and the preset environmental parameters and the on-state ratios of the second color temperature LED group. This allows the LED luminaire's color temperature to automatically change with variations in the external environment. Furthermore, the control circuits for the on / off times of the first and second color temperature LED groups are implemented using discrete switching elements, resulting in a simple and low-cost circuit. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of a lighting driver provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the first control sub-circuit provided in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the second control sub-circuit provided in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of another lighting driver provided in an embodiment of the present invention. Detailed Implementation

[0027] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0028] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0029] Example 1

[0030] To address the technical problem that the color temperature of existing LED lamps cannot automatically change with variations in the external environment, this embodiment provides a lighting driver 1. Please refer to [reference needed]. Figure 1 , Figure 1 This is a schematic diagram of a lighting driver provided in an embodiment of the present invention. The lighting driver 1 includes a control unit MCU, a sensing unit wiring port 11 for connecting an external sensing unit, a first power supply 12, a first control sub-circuit 13, and a second control sub-circuit 14;

[0031] The control unit MCU is electrically connected to the first power supply 12 and the external first color temperature LED group 2 and second color temperature LED group 3 respectively, and is used to convert the first power supply 12 into a dual DC power supply and output it to the first color temperature LED group 2 and the second color temperature LED group 3 respectively.

[0032] The sensing unit wiring port 11 is electrically connected to the control unit MCU, and is used to sense the environmental parameters of the surrounding environment through the external sensing unit and output the environmental parameters to the control unit MCU, so that the control unit MCU can control the opening and closing of the first color temperature LED group 2 and the second color temperature LED group 3 respectively according to the correspondence between the environmental parameters and the preset environmental parameters and the opening ratio of the first color temperature LED group 2 and the second color temperature LED group 3.

[0033] The first control sub-circuit 13 is electrically connected to the control unit MCU and the first color temperature LED group 2 respectively, and includes multiple discrete switching elements for adjusting the on and off time of the first color temperature LED group 2 according to the control of the control unit MCU;

[0034] The second control sub-circuit 14 is electrically connected to the control unit MCU and the second color temperature LED group 3, and includes multiple discrete switching elements for adjusting the on and off times of the second color temperature LED group 3 according to the control of the control unit MCU.

[0035] Specifically, in the lighting driver 1 of this embodiment, the first power supply 12 can be an external DC power supply or AC power supply. The color temperatures of the first color temperature LED group 2 and the second color temperature LED group 3 are different; for example, the color temperature of the first color temperature LED group 2 is 2700K, and the color temperature of the second color temperature LED group 3 is 6500K. The dual DC power supply generated by the control unit MCU includes a first DC power supply DCa and a second DC power supply DCb. The first DC power supply DCa is electrically connected to the positive terminal of the first color temperature LED group 2 to supply power to it, and the second DC power supply DCb is electrically connected to the positive terminal of the second color temperature LED group 3 to supply power to it. The types of environmental parameters sensed by the sensing unit can be set according to actual needs. For example, when the sensing unit senses the ambient temperature, the color temperature of the LED lamps automatically changes with the change of the ambient temperature; when the sensing unit senses the ambient visibility, the color temperature of the LED lamps automatically changes with the change of the ambient visibility. The correspondence between environmental parameters and the on-time ratios of the first color temperature LED group 2 and the second color temperature LED group 3 includes the ratio of the on-time of the first color temperature LED group 2 to the sum of its on-time and off-time, and the ratio of the on-time of the second color temperature LED group 3 to the sum of its on-time and off-time, respectively, for different environmental parameters. The color temperature of the LED lamp is adjusted by regulating the on-time ratios of the two color temperature LED groups. Taking the color temperature of the first color temperature LED group 2 as 2700K and the color temperature of the second color temperature LED group 3 as 6500K, when the on-time ratio of the first color temperature LED group 2 is 80% and the on-time ratio of the second color temperature LED group 3 is 20%, the color temperature of the LED lamp is 3500K. Understandably, when the voltages of the first DC power supply DCa and the second DC power supply DCb are the same, and the sum of the on-state ratios of the first color temperature LED group 2 and the second color temperature LED group 3 corresponding to different environmental parameters remains unchanged, color temperature adjustment can be achieved while keeping the LED lamp power constant. Continuing with the example of the color temperature of the first color temperature LED group 2 being 2700K and the color temperature of the second color temperature LED group 3 being 6500K, when the on-state ratio of the first color temperature LED group 2 is 80% and the on-state ratio of the second color temperature LED group 3 is 20%, the color temperature of the LED lamp is 3500K, and the sum of the on-state ratios of the two color temperature LED groups is 100%. When the on-state ratio of the first color temperature LED group 2 is 50% and the on-state ratio of the second color temperature LED group 3 is 50%, the color temperature of the LED lamp is 4000K, and the sum of the on-state ratios of the two color temperature LED groups is also 100%. Thus, color temperature adjustment is achieved while keeping the LED lamp power constant at 100%.The first control sub-circuit 13 is electrically connected to the control unit MCU and the first color temperature LED group 2, and includes multiple discrete switching elements. Through the cooperation of these discrete switching elements, the on and off times of the first color temperature LED group 2 are adjusted according to the control of the control unit MCU. The second control sub-circuit 14 is electrically connected to the control unit MCU and the second color temperature LED group 3, and includes multiple discrete switching elements. Through the cooperation of these discrete switching elements, the on and off times of the second color temperature LED group 3 are adjusted according to the control of the control unit MCU. Adjusting the on and off times of the two color temperature LED groups adjusts their on / off ratio. Adjusting the on / off ratio achieves color temperature adjustment of the LED lamp, thereby dynamically adjusting the color temperature of the LED lamp according to changes in environmental parameters. Moreover, the control circuit for the on / off ratio of the first color temperature LED group 2 and the second color temperature LED group 3 is implemented using discrete switching elements, resulting in a simple circuit and low cost.

[0036] In one implementation, please refer to Figure 1 The first control sub-circuit 13 includes a first switching element S1, a second switching element S2, and a fifth switching element S5. The control terminals of the first switching element S1 and the fifth switching element S5 are electrically connected to the control unit MCU, and their output terminals are electrically connected to the control terminal of the second switching element S2. The output terminal of the second switching element S2 is electrically connected to the external first color temperature LED group 2, and is used to adjust the on and off time of the first color temperature LED group 2 according to the control of the control unit MCU. The second control sub-circuit 14 includes a third switching element S3, a fourth switching element S4, and a sixth switching element S6. The control terminals of the third switching element S3 and the sixth switching element S6 are electrically connected to the control unit MCU, and their output terminals are electrically connected to the control terminal of the fourth switching element S4. The output terminal of the fourth switching element S4 is electrically connected to the external second color temperature LED group 3, and is used to adjust the on and off time of the second color temperature LED group 3 according to the control of the control unit MCU.

[0037] In this embodiment, the first switching element S1, the second switching element S2 and the fifth switching element S5 cooperate to adjust the on and off time of the first color temperature LED group 2 according to the control of the control unit MCU; the third switching element S3, the fourth switching element S4 and the sixth switching element S6 cooperate to adjust the on and off time of the second color temperature LED group 3 according to the control of the control unit MCU.

[0038] In one embodiment, the first switching element S1 includes a first transistor QA1, the second switching element S2 includes a first NMOS transistor QA3, and the fifth switching element S5 includes a second transistor QA2. The first control sub-circuit 13 further includes a first current-limiting resistor RA1 and a second current-limiting resistor RA3. The base of the first transistor QA1 is electrically connected to the first control terminal MCU-C1 of the control unit MCU through the first current-limiting resistor RA1, the collector is connected to the second power supply, and the emitter is electrically connected to the gate of the first NMOS transistor QA3 through the second current-limiting resistor RA3. The drain of the first NMOS transistor QA3 is electrically connected to the negative power supply of the first color temperature LED group 2, and the source is grounded. The base of the second transistor QA2 is electrically connected to the first control terminal MCU-C1 of the control unit MCU through the first current-limiting resistor RA1, the emitter is electrically connected to the emitter of the first transistor QA1, and the collector is grounded.

[0039] In this embodiment, the first switching element S1 can be, but is not limited to, a first transistor QA1; the second switching element S2 can be, but is not limited to, a first NMOS transistor QA3; and the fifth switching element S5 can be, but is not limited to, a second transistor QA2. The key requirement is that the interaction of the first switching element S1, the second switching element S2, and the fifth switching element S5 enables the adjustment of the on / off time of the first color temperature LED group 2 according to the control unit MCU. For example, the first switching element S1 and the fifth switching element S5 can also be IGBTs (Insulated Gate Bipolar Transistors) or thyristors, and the second switching element S2 can also be a PMOS transistor. Please refer to [reference needed]. Figure 1 and Figure 2 , Figure 2This is a schematic diagram of the first control sub-circuit provided in an embodiment of the present invention. The following description uses an NPN transistor QA1 as the first switching element S1, an NMOS transistor QA3 as the second switching element S2, and a PNP transistor QA2 as the fifth switching element S5. The base of the first transistor QA1 is electrically connected to the first control terminal MCU-C1 of the control unit MCU via a first current-limiting resistor RA1; its collector is connected to a second power supply with a voltage of 5V; its emitter is electrically connected to the gate of the first NMOS transistor QA3 via a second current-limiting resistor RA3; the drain of the first NMOS transistor QA3 is electrically connected to node A; and its source is grounded. Node A is the negative power supply node of the first color temperature LED group 2. The base of the second transistor QA2 is electrically connected to the first control terminal MCU-C1 of the control unit MCU via a first current-limiting resistor RA1; its emitter is electrically connected to the emitter of the first transistor QA1; and its collector is grounded. The working principle of the first control sub-circuit 13 is as follows: When the first color adjustment signal sent by the control unit MCU through the first control terminal MCU-C1 is high, the first transistor QA1 is turned on, the second transistor QA2 is turned off, and the first NMOS transistor QA3 is turned on, thus pulling the negative terminal of the power supply of the first color temperature LED group 2 to ground, and the first color temperature LED group 2 is turned on; when the first color adjustment signal is low, the first transistor QA1 is turned off, the second transistor QA2 is turned on, and the first NMOS transistor QA3 is turned off, thus disconnecting the connection between the negative terminal of the power supply of the first color temperature LED group 2 and ground, and the first color temperature LED group 2 is turned off. When the control unit MCU outputs first color adjustment signals with different ratios of high and low levels, the on / off ratio control of the first NMOS transistor QA3 can be realized, thereby realizing the control of the on ratio of the first color temperature LED group 2.

[0040] In one implementation, please refer to Figure 2 The first control sub-circuit 13 also includes a first diode DA1 and a third current-limiting resistor RA2. The positive terminal of the first diode DA1 is electrically connected to the gate of the first NMOS transistor QA3, and the negative terminal is electrically connected to one end of the third current-limiting resistor RA2. The other end of the third current-limiting resistor RA2 is electrically connected to the emitter of the second transistor QA2.

[0041] In this embodiment, the first diode DA1 and the third current-limiting resistor RA2 form a fast discharge circuit for the gate of the first NMOS transistor QA3 when the second transistor QA2 is turned on, so as to reduce the turn-off time of the first NMOS transistor QA3.

[0042] In one embodiment, the third switching element S3 includes a third transistor QB1, the fourth switching element S4 includes a second NMOS transistor QB3, and the sixth switching element S6 includes a fourth transistor QB2. The second control sub-circuit 14 further includes a fourth current-limiting resistor RB1 and a fifth current-limiting resistor RB3. The base of the third transistor QB1 is electrically connected to the second control terminal MCU-C2 of the control unit MCU through the fourth current-limiting resistor RB1, the collector is connected to the second power supply, and the emitter is electrically connected to the gate of the second NMOS transistor QB3 through the fifth current-limiting resistor RB3. The drain of the second NMOS transistor QB3 is electrically connected to the negative power supply of the second color temperature LED group 3, and the source is grounded. The base of the fourth transistor QB2 is electrically connected to the second control terminal MCU-C2 of the control unit MCU through the fourth current-limiting resistor RB1, the emitter is electrically connected to the emitter of the third transistor QB1, and the collector is grounded.

[0043] In this embodiment, the third switching element S3 can be, but is not limited to, a third transistor QB1; the fourth switching element S4 can be, but is not limited to, a second NMOS transistor QB3; and the sixth switching element S6 can be, but is not limited to, a fourth transistor QB2. The key requirement is that the interaction of the third switching element S3, the fourth switching element S4, and the sixth switching element S6 enables the adjustment of the on / off time of the second color temperature LED group 3 according to the control unit MCU. For example, the third switching element S3 and the sixth switching element S6 can also be IGBTs (Insulated Gate Bipolar Transistors) or thyristors, and the fourth switching element S4 can also be a PMOS transistor. Please refer to [reference needed]. Figure 1 and Figure 3 , Figure 3This is a schematic diagram of the second control sub-circuit provided in this embodiment of the utility model. The following example illustrates the third switching element S3 using an NPN transistor QB1, the fourth switching element S4 using a second NMOS transistor QB3, and the sixth switching element S6 using a PNP transistor QB2. The base of the third transistor QB1 is electrically connected to the second control terminal MCU-C2 of the control unit MCU via a fourth current-limiting resistor RB1; its collector is connected to a second power supply with a voltage of 5V; its emitter is electrically connected to the gate of the second NMOS transistor QB3 via a fifth current-limiting resistor RB3; the drain of the second NMOS transistor QB3 is electrically connected to node B; and its source is grounded. Node B is the negative power supply node of the second color temperature LED group 3. The base of the fourth transistor QB2 is electrically connected to the second control terminal MCU-C2 of the control unit MCU via a fourth current-limiting resistor RB1; its emitter is electrically connected to the emitter of the third transistor QB1; and its collector is grounded. The working principle of the second control sub-circuit 14 is as follows: When the second color-tuning signal sent by the control unit MCU through the second control terminal MCU-C2 is high, the third transistor QB1 is turned on, the fourth transistor QB2 is turned off, and the second NMOS transistor QB3 is turned on, thus pulling the negative terminal of the power supply of the second color temperature LED group 3 to ground, and the second color temperature LED group 3 is turned on; when the second color-tuning signal is low, the third transistor QB1 is turned off, the fourth transistor QB2 is turned on, and the second NMOS transistor QB3 is turned off, thus disconnecting the negative terminal of the power supply of the second color temperature LED group 3 from ground, and the second color temperature LED group 3 is turned off. When the control unit MCU outputs second color-tuning signals with different ratios of high and low levels, the on / off ratio control of the second NMOS transistor QB3 can be realized, thereby realizing the control of the on ratio of the second color temperature LED group 3.

[0044] In one implementation, please refer to Figure 3 The second control sub-circuit 14 also includes a second diode DB1 and a sixth current-limiting resistor RB2. The positive terminal of the second diode DB1 is electrically connected to the gate of the second NMOS transistor QB3, and the negative terminal is electrically connected to one end of the sixth current-limiting resistor RB2. The other end of the sixth current-limiting resistor RB2 is electrically connected to the emitter of the fourth transistor QB2.

[0045] In this embodiment, the second diode DB1 and the sixth current-limiting resistor RB2 form a fast discharge circuit for the gate of the second NMOS transistor QB3 when the fourth transistor QB2 is turned on, so as to reduce the turn-off time of the second NMOS transistor QB3.

[0046] In one embodiment, the sensing unit is detachably connected to the sensing unit wiring port 11.

[0047] In this embodiment, the sensing unit is detachably connected to the sensing unit wiring port 11, thereby improving the flexibility of the lighting driver application.

[0048] Optionally, the sensing unit wiring port 11 is located at the external end of the lighting driver 1 to facilitate the installation and removal of the sensing unit.

[0049] In one implementation, please refer to Figure 4 , Figure 4 This is a schematic diagram of another lighting driver provided in an embodiment of the present invention. The sensing unit wiring port 11 includes a first wiring port J1 and a second wiring port J2, which are electrically connected to the control unit MCU respectively.

[0050] In this embodiment, the sensing unit is detachably connected to the first wiring port J1 and the second wiring port J2.

[0051] In one embodiment, the sensing unit includes an ambient temperature sensing module and an ambient temperature sensing verification module, wherein the ambient temperature sensing module is connected to a first wiring port J1 and the ambient temperature sensing verification module is connected to a second wiring port J2.

[0052] In this embodiment, by connecting the ambient temperature sensing and verification module to the second wiring port J2, the reliability of temperature sensing can be improved.

[0053] Please refer to Figures 2 to 4Taking the color temperature of the first color temperature LED group 2 as 2700K and the color temperature of the second color temperature LED group 3 as 6500K as an example, the first wiring port J1 is connected to the ambient temperature sensing module, and the second wiring port J2 is connected to the ambient temperature sensing verification module. The difference between the sensing values ​​of the first wiring port J1 and the second wiring port J2 is not greater than 5 degrees Celsius to be considered a valid value. The ambient temperature sensing module transmits the sensed temperature to the control unit MCU through the first wiring port J1. The control unit MCU controls the output of the first control terminal MCU-C1 and the second control terminal MCU-C2 according to the pre-stored correspondence between the sensed temperature and the on-state ratio of the first color temperature LED group 2 and the on-state ratio of the second color temperature LED group 3, so as to change the actual output color temperature value according to the ambient temperature.For example: When the sensed temperature of the first terminal J1 is below -10 degrees Celsius, and the difference between its sensed temperature and that of the second terminal J2 is no greater than 5 degrees Celsius, the proportion of high-level outputs by the first control terminal MCU-C1 is 100%, the proportion of high-level outputs by the second control terminal MCU-C2 is 0%, the output voltage remains unchanged, and the lamp's output color temperature is 2700K; when the sensed temperature of the first terminal J1 is above -10 degrees Celsius and less than or equal to 5 degrees Celsius, and the difference between its sensed temperature and that of the second terminal J2 is no greater than 5 degrees Celsius, the proportion of high-level outputs by the first control terminal MCU-C1 is 100%. For example, the output voltage is 80%, meaning the duration of the high-level output by the first control terminal MCU-C1 accounts for 80% of the sum of its high-level and low-level output durations. The proportion of the high-level output by the second control terminal MCU-C2 is 20%, meaning the duration of the high-level output by the second control terminal MCU-C2 accounts for 20% of the sum of its high-level and low-level output durations. The output voltage remains constant, and the lamp's output color temperature is 3500K. When the sensed temperature of the first wiring port J1 is higher than 5 degrees Celsius and less than or equal to 20 degrees Celsius, and the difference between its sensed temperature and that of the second wiring port J2 is no greater than 5 degrees Celsius, The first control terminal MCU-C1 outputs a high level for 50% of the time, correspondingly, the output current of the first DC power supply DCa connected to the first color temperature LED group 2 is 50% of the total current. The second control terminal MCU-C2 outputs a high level for 50% of the time, correspondingly, the output current of the second DC power supply DCb connected to the second color temperature LED group 3 is 50% of the total current. The output voltage remains constant, and the lamp output color temperature is 4000K. When the sensing temperature of the first wiring port J1 is higher than 20 degrees Celsius and less than or equal to 28 degrees Celsius, and its temperature is different from that of the second wiring port J2... When the temperature difference is no greater than 5 degrees Celsius, the first control terminal MCU-C1 outputs a high level 20% of the time, the second control terminal MCU-C2 outputs a high level 80% of the time, the output voltage remains constant, and the lamp output color temperature is 5000K. When the temperature sensed at the first wiring port J1 is higher than 28 degrees Celsius, and the temperature difference between it and the second wiring port J2 is no greater than 5 degrees Celsius, the first control terminal MCU-C1 outputs a high level 0% of the time, the second control terminal MCU-C2 outputs a high level 100% of the time, the output voltage remains constant, and the lamp output color temperature is 6500K. In this embodiment, the overall lamp power remains constant when adjusting the lamp output color temperature.

[0054] In one embodiment, the sensing unit includes a visibility sensing module connected between a first wiring port J1 and a second wiring port J2.

[0055] In this embodiment, the visibility sensing module is connected between the first wiring port J1 and the second wiring port J2 to sense the ambient visibility.

[0056] Please refer to Figures 2 to 4 Taking the color temperature of the first color temperature LED group 2 as 2700K and the color temperature of the second color temperature LED group 3 as 6500K as an example, a visibility sensing module is connected between the first wiring port J1 and the second wiring port J2 to sense the ambient visibility and output the sensing result to the control unit MCU. The control unit MCU controls the output of the first control terminal MCU-C1 and the second control terminal MCU-C2 according to the pre-stored correspondence between the sensed visibility and the on-state ratio of the first color temperature LED group 2 and the on-state ratio of the second color temperature LED group 3, so as to change the actual output color temperature value according to the ambient visibility. For example: When the sensed visibility is less than 100 meters, the first control terminal MCU-C1 outputs a high level 100% of the time, the second control terminal MCU-C2 outputs a high level 0% of the time, the output voltage remains unchanged, and the lamp's output color temperature is 2700K; when the sensed visibility is greater than or equal to 100 meters and less than 200 meters, the first control terminal MCU-C1 outputs a high level 80% of the time, meaning the duration of the high-level output by the first control terminal MCU-C1 is 80% of the sum of its high-level and low-level output durations, and the second control terminal MCU-C2 outputs a high level 20% of the time, meaning the duration of the high-level output by the second control terminal MCU-C2 is 20% of the sum of its high-level and low-level output durations, the output voltage remains unchanged, and the lamp's output color temperature is 3500K; when the sensed visibility is greater than or equal to 205 meters and less than 500 meters, the first control terminal MCU-C1 outputs a high level 50% of the time, the second control terminal MCU-C1 outputs a high level 50% of the time, the second control terminal MCU-C2 outputs a high level 0% of the time, the output voltage remains unchanged, and the lamp's output color temperature is 3500K; when the sensed visibility is greater than or equal to 205 meters and less than 500 meters, the first control terminal MCU-C1 outputs a high level 50% of the time, the second control terminal MCU-C1 outputs a high level 0% of the time, the third control terminal MCU-C1 outputs a high level 0% of the time, the fourth control terminal MCU-C1 outputs a high level 0% of the time, the fifth control terminal MCU-C1 outputs a high level 0% of the time, the sixth control terminal MCU-C1 outputs a high When the light temperature is 0%, the output current of the first DC power supply DCa connected to the first color temperature LED group 2 is 50% of the total current, and the high-level output ratio of the second control terminal MCU-C2 is 50%. Correspondingly, the output current of the second DC power supply DCb connected to the second color temperature LED group 3 is 50% of the total current, the output voltage remains unchanged, and the lamp output color temperature is 4000K. When the sensed visibility is greater than or equal to 505 meters and less than or equal to 2000 meters, the high-level output ratio of the first control terminal MCU-C1 is 20%, the high-level output ratio of the second control terminal MCU-C2 is 80%, the output voltage remains unchanged, and the lamp output color temperature is 5000K. When the sensed visibility is greater than 2000 meters, the high-level output ratio of the first control terminal MCU-C1 is 0%, the high-level output ratio of the second control terminal MCU-C2 is 100%, the output voltage remains unchanged, and the lamp output color temperature is 6500K. In this embodiment, the total lamp power remains unchanged when adjusting the lamp output color temperature.

[0057] The lighting driver 1 in this embodiment includes a control unit MCU, a sensing unit connection port 11 for connecting an external sensing unit, a first power supply 12, a first control sub-circuit 13, and a second control sub-circuit 14. The control unit MCU is electrically connected to the first power supply 12 and external first color temperature LED group 2 and second color temperature LED group 3, respectively, and is used to convert the first power supply 12 into a dual-channel DC power supply and output it to the first color temperature LED group 2 and the second color temperature LED group 3. The sensing unit connection port 11 is electrically connected to the control unit MCU and is used to sense environmental parameters of the surrounding environment through the external sensing unit and output the environmental parameters to the control unit MCU, so that the control unit MCU can adjust the control parameters according to the environmental parameters. The lighting driver 1 and the lamp's control unit MCU are configured to control the on / off times of the first color temperature LED group 2 and the second color temperature LED group 3 according to the correspondence between environmental parameters input from the sensing unit and preset environmental parameters and the on / off ratios of the first color temperature LED group 2 and the second color temperature LED group 3, respectively. The first control sub-circuit 13 is electrically connected to the control unit MCU and the first color temperature LED group 2, and includes multiple discrete switching elements for adjusting the on / off times of the first color temperature LED group 2 according to the control unit MCU. The second control sub-circuit 14 is electrically connected to the control unit MCU and the second color temperature LED group 3, and includes multiple discrete switching elements for adjusting the on / off times of the second color temperature LED group 3 according to the control unit MCU. Based on the correspondence between the environmental parameters input from the sensing unit and preset environmental parameters and the on / off ratios of the first color temperature LED group 2 and the second color temperature LED group 3, the lighting driver 1 and the lamp's control unit MCU control the on / off ratios of the first color temperature LED group 2 and the second color temperature LED group 3, respectively, thereby enabling the LED lamp's color temperature to automatically change with changes in the external environment. Furthermore, the control circuits for the on and off times of the first color temperature LED group 2 and the second color temperature LED group 3 are implemented using discrete switching elements, resulting in simple circuits and low costs.

[0058] Example 2

[0059] This embodiment provides a lamp, which includes the lighting driver 1 described in Embodiment 1 above. The control unit (MCU) of this lamp controls the on-state ratios of the first color temperature LED group 2 and the second color temperature LED group 3 according to the correspondence between the environmental parameters input from the sensing unit and the preset environmental parameters and their corresponding on-state ratios. This allows the LED lamp's color temperature to automatically change with changes in the external environment, solving the technical problem that existing LED lamps cannot automatically change their color temperature with changes in the external environment. Furthermore, the control circuits for the on and off times of the first color temperature LED group 2 and the second color temperature LED group 3 are implemented using discrete switching elements, resulting in a simple and low-cost circuit. The specific structure of the lighting driver 1 is as described in Embodiment 1 above and will not be repeated here.

[0060] The corresponding technical features in the above embodiments can be used in combination without causing contradictions or making the solutions unfeasible.

[0061] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0062] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0063] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A lighting driver, characterized in that, The lighting driver includes a control unit, a sensing unit wiring port for connecting an external sensing unit, a first power supply, a first control sub-circuit, and a second control sub-circuit. The control unit is electrically connected to the first power supply and the external first color temperature LED group and second color temperature LED group respectively, and is used to convert the first power supply into dual DC power supply and output it to the first color temperature LED group and the second color temperature LED group respectively. The sensing unit's wiring port is electrically connected to the control unit. It is used to sense environmental parameters of the surrounding environment through the external sensing unit and output the environmental parameters to the control unit. The control unit then controls the opening and closing of the first color temperature LED group and the second color temperature LED group according to the environmental parameters and the corresponding relationship between the preset environmental parameters and the opening ratio of the first color temperature LED group and the second color temperature LED group. The first control sub-circuit is electrically connected to the control unit and the first color temperature LED group respectively, and includes multiple discrete switching elements for adjusting the on and off time of the first color temperature LED group according to the control of the control unit; The second control sub-circuit is electrically connected to the control unit and the second color temperature LED group, and includes multiple discrete switching elements for adjusting the on and off times of the second color temperature LED group according to the control of the control unit.

2. The lighting driver according to claim 1, characterized in that, The first control sub-circuit includes a first switching element, a second switching element, and a fifth switching element. The control terminals of the first and fifth switching elements are electrically connected to the control unit, and their output terminals are electrically connected to the control terminal of the second switching element. The output terminal of the second switching element is electrically connected to an external first color temperature LED group. The second control sub-circuit includes a third switch element, a fourth switch element, and a sixth switch element. The control terminals of the third and sixth switch elements are electrically connected to the control unit, and their output terminals are electrically connected to the control terminal of the fourth switch element. The output terminal of the fourth switch element is electrically connected to the external second color temperature LED group.

3. The lighting driver according to claim 2, characterized in that, The first switching element includes a first transistor, the second switching element includes a first NMOS transistor, and the fifth switching element includes a second transistor. The first control sub-circuit also includes a first current-limiting resistor and a second current-limiting resistor. The base of the first transistor is electrically connected to the first control terminal of the control unit through the first current-limiting resistor, the collector is connected to the second power supply, and the emitter is electrically connected to the gate of the first NMOS transistor through the second current-limiting resistor. The drain of the first NMOS transistor is electrically connected to the negative terminal of the power supply of the first color temperature LED group, and the source is grounded. The base of the second transistor is electrically connected to the first control terminal of the control unit through the first current-limiting resistor, the emitter is electrically connected to the emitter of the first transistor, and the collector is grounded.

4. The lighting driver according to claim 3, characterized in that, The first control sub-circuit also includes a first diode and a third current-limiting resistor. The positive terminal of the first diode is electrically connected to the gate of the first NMOS transistor, and the negative terminal is electrically connected to one end of the third current-limiting resistor. The other end of the third current-limiting resistor is electrically connected to the emitter of the second transistor.

5. The lighting driver according to any one of claims 2-4, characterized in that, The third switching element includes a third transistor, the fourth switching element includes a second NMOS transistor, and the sixth switching element includes a fourth transistor. The second control sub-circuit also includes a fourth current-limiting resistor and a fifth current-limiting resistor. The base of the third transistor is electrically connected to the second control terminal of the control unit through the fourth current-limiting resistor, the collector is connected to the second power supply, and the emitter is electrically connected to the gate of the second NMOS transistor through the fifth current-limiting resistor. The drain of the second NMOS transistor is electrically connected to the negative power supply of the second color temperature LED group, and the source is grounded. The base of the fourth transistor is electrically connected to the second control terminal of the control unit through the fourth current-limiting resistor, the emitter is electrically connected to the emitter of the third transistor, and the collector is grounded.

6. The lighting driver according to claim 5, characterized in that, The second control sub-circuit also includes a second diode and a sixth current-limiting resistor. The positive terminal of the second diode is electrically connected to the gate of the second NMOS transistor, and the negative terminal is electrically connected to one end of the sixth current-limiting resistor. The other end of the sixth current-limiting resistor is electrically connected to the emitter of the fourth transistor.

7. The lighting driver according to claim 1, characterized in that, The sensing unit wiring port is located at the outer end of the lighting driver, and the sensing unit is detachably connected to the sensing unit wiring port.

8. The lighting driver according to claim 7, characterized in that, The sensing unit wiring ports include a first wiring port and a second wiring port, which are electrically connected to the control unit, respectively.

9. The lighting driver according to claim 8, characterized in that, The sensing unit includes an ambient temperature sensing module and an ambient temperature sensing verification module. The ambient temperature sensing module is connected to a first wiring port, and the ambient temperature sensing verification module is connected to a second wiring port. Alternatively, the sensing unit may include a visibility sensing module connected between the first wiring port and the second wiring port.

10. A lamp, characterized in that, The luminaire includes a lighting driver as described in any one of claims 1-9.

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