LED lamp cold and warm color controller

Abstract

The utility model discloses an LED lamp cold and warm color controller, which relates to the LED field, and comprises a power supply circuit used as a power supply to supply voltage to a current detection circuit and a color temperature control circuit; the LED working circuit is used for receiving the control of the color temperature control circuit, and an LED lamp emits light and illuminates during working; the current detection circuit is used for detecting current flowing through the LED working circuit, converting the current into a voltage signal and feeding back the voltage signal to the color temperature control circuit; compared with the prior art, the LED lamp has the beneficial effects that the current detection circuit is matched with the color temperature control circuit, so that the control on the color change of light in the dimming process is realized, a more comfortable and cozy atmosphere can be created, the applicability of the LED lamp is improved, and the requirements of different occasions are met; by adopting the modular design, the LED lamp can be connected between a power supply and an LED lamp cap, and is easy to install and maintain.

Description

Technical Field

[0001] The utility model relates to the field of LEDs, in particular to a cold and warm color controller for an LED lamp. Background Art

[0002] LED lights are now widely used in the lighting field. However, traditional LED lights can only adjust the brightness of the light during dimming, but cannot change the color of the light. This makes traditional LED lights inadequate for creating a specific atmosphere in places such as restaurants and hotels, and requires improvement. Utility Model Content

[0003] The purpose of the present invention is to provide a cold and warm color controller for an LED lamp to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A LED lamp cold and warm color controller, comprising:

[0006] The power supply circuit is used as a power supply to supply voltage to the current detection circuit and the color temperature control circuit;

[0007] The LED working circuit is used to receive control from the color temperature control circuit, and the LED lamp emits light when working;

[0008] The current detection circuit is used to detect the current flowing through the LED working circuit, convert it into a voltage signal, and feed it back to the color temperature control circuit;

[0009] The color temperature control circuit is used to adjust the color temperature of the LED working circuit based on the received voltage signal, so that the color temperature of the LED lamp changes with the dimming brightness; the color temperature at maximum brightness is set by a manual switch;

[0010] The power supply circuit is connected to the LED working circuit, the current detection circuit, and the color temperature control circuit. The LED working circuit is connected to the current detection circuit. The current detection circuit is connected to the color temperature control circuit. The color temperature control circuit is connected to the LED working circuit.

[0011] As a further solution of the present utility model: the power supply circuit includes an LED power supply, a transistor Q3, a resistor R15, a diode ZD1, a capacitor C3, a voltage regulator U3, and a capacitor C4. The LED power supply is connected to the collector of the transistor Q3, one end of the resistor R15, and the LED working circuit. The base of the transistor Q3 is connected to the other end of the resistor R15 and the cathode of the diode ZD1. The anode of the diode ZD1 is grounded. The emitter of the transistor Q3 is connected to one end of the capacitor C3 and the input end of the voltage regulator U3. The other end of the capacitor C3 is grounded. The ground end of the voltage regulator U3 is grounded. The output end of the voltage regulator U3 is connected to one end of the capacitor C4, the current detection circuit, and the color temperature control circuit. The other end of the capacitor C4 is grounded.

[0012] As a further solution of the present invention: the LED working circuit includes an LED lamp holder, a MOS tube Q1, a MOS tube Q2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, and a resistor R5. The V+ end of the LED lamp holder is connected to the power supply circuit, the W- end of the LED lamp holder is connected to the D pole of the MOS tube Q1, the C- end of the LED lamp holder is connected to the D pole of the MOS tube Q2, the G pole of the MOS tube Q1 is connected to one end of the resistor R1 and one end of the resistor R3, the other end of the resistor R1 is connected to the color temperature control circuit, the G pole of the MOS tube Q2 is connected to one end of the resistor R2 and one end of the resistor R4, the other end of the resistor R2 is connected to the color temperature control circuit, the S pole of the MOS tube Q1 is connected to the S pole of the MOS tube Q2, the other end of the resistor R3, the other end of the resistor R4, one end of the resistor R5, and the current detection circuit, and the other end of the resistor R5 is grounded.

[0013] As a further solution of the present utility model: the current detection circuit includes a resistor R6, a resistor R7, a resistor R8, a capacitor C1, a capacitor C2, an amplifier U1, a resistor R14, and a capacitor C7. The non-inverting end of the amplifier U1 is connected to one end of the resistor R8 and one end of the capacitor C2, the other end of the capacitor C2 is grounded, the other end of the resistor R8 is connected to the S pole of the MOS tube Q1, the inverting end of the amplifier U1 is connected to one end of the resistor R7, one end of the resistor R6, and one end of the capacitor C1, the other end of the resistor R7 is grounded, the other end of the resistor R6 is connected to the other end of the capacitor C1, the output end of the amplifier U1, and one end of the resistor R14. The other end of the resistor R14 is connected to one end of the capacitor C7 and the color temperature control circuit, and the other end of the capacitor C7 is grounded.

[0014] As a further solution of the present invention: the color temperature control circuit includes a chip U2 and a switch SW1. The model of the chip U2 is 56P045ASD. Pin 1 of the chip U2 is connected to one end of the capacitor C5 and a 5V voltage, and the other end of the capacitor C5 is grounded. Pin 4 of the chip U2 is connected to the current detection circuit. Pins 5 and 6 of the chip U2 are connected to the LED working circuit. Pin 8 of the chip U2 is grounded. Pin 7 of the chip U2 is connected to one end of the capacitor C6, one end of the resistor R16, and the sixth end of the switch SW1. The other end of the capacitor C6 is grounded, and the other end of the resistor R16 is grounded. The first end to the fifth end of the switch SW1 are respectively connected to a 5V voltage through a resistor.

[0015] Compared with the existing technology, the beneficial effects of the present invention are: the cooperation of the current detection circuit and the color temperature control circuit in the present invention realizes the control of the color change of the light during the dimming process, can create a more comfortable and warm atmosphere, improve the applicability of LED lamps, and meet the needs of different occasions; it adopts a modular design and can be connected between the power supply and the LED lamp head, which is easy to install and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The following is a circuit diagram of a cold and warm color controller for an LED lamp.

[0017] Figure 2 This is a graph showing how the color temperature of LED lights changes with brightness. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] See also Figure 1 , a LED lamp cold and warm color controller, including,

[0020] The power supply circuit is used as a power supply to supply voltage to the current detection circuit and the color temperature control circuit;

[0021] The LED working circuit is used to receive control from the color temperature control circuit, and the LED lamp emits light when working;

[0022] The current detection circuit is used to detect the current flowing through the LED working circuit, convert it into a voltage signal, and feed it back to the color temperature control circuit;

[0023] The color temperature control circuit is used to adjust the color temperature of the LED working circuit based on the received voltage signal, so that the color temperature of the LED lamp changes with the dimming brightness; the color temperature at maximum brightness is set by a manual switch;

[0024] The power supply circuit is connected to the LED working circuit, the current detection circuit, and the color temperature control circuit. The LED working circuit is connected to the current detection circuit. The current detection circuit is connected to the color temperature control circuit. The color temperature control circuit is connected to the LED working circuit.

[0025] In this example: See Figure 1 The power supply circuit includes an LED power supply, a transistor Q3, a resistor R15, a diode ZD1, a capacitor C3, a voltage regulator U3, and a capacitor C4. The LED power supply is connected to the collector of the transistor Q3, one end of the resistor R15, and the LED working circuit. The base of the transistor Q3 is connected to the other end of the resistor R15 and the cathode of the diode ZD1. The anode of the diode ZD1 is grounded. The emitter of the transistor Q3 is connected to one end of the capacitor C3 and the input end of the voltage regulator U3. The other end of the capacitor C3 is grounded. The ground end of the voltage regulator U3 is grounded. The output end of the voltage regulator U3 is connected to one end of the capacitor C4, the current detection circuit, and the color temperature control circuit. The other end of the capacitor C4 is grounded.

[0026] The LED power supply converts AC power into DC power (AC to DC conversion is an existing technology, so it will not be introduced in detail) as the power supply for the LED lamp head. At the same time, the DC power is output to the voltage regulator U3 through the voltage of the transistor Q3. The voltage regulator U3 outputs a constant 5V voltage as the operating voltage of the current detection circuit and the color temperature control circuit.

[0027] In this example: See Figure 1 The LED working circuit includes an LED lamp holder, a MOS tube Q1, a MOS tube Q2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, and a resistor R5. The V+ end of the LED lamp holder is connected to the power supply circuit, the W- end of the LED lamp holder is connected to the D pole of the MOS tube Q1, the C- end of the LED lamp holder is connected to the D pole of the MOS tube Q2, the G pole of the MOS tube Q1 is connected to one end of the resistor R1 and one end of the resistor R3, the other end of the resistor R1 is connected to the color temperature control circuit, the G pole of the MOS tube Q2 is connected to one end of the resistor R2 and one end of the resistor R4, the other end of the resistor R2 is connected to the color temperature control circuit, the S pole of the MOS tube Q1 is connected to the S pole of the MOS tube Q2, the other end of the resistor R3, the other end of the resistor R4, one end of the resistor R5, and the current detection circuit, and the other end of the resistor R5 is grounded.

[0028] The LED lamp voltage is input through V+ and output through W- and C-. The current at W- controls the warm tone of the LED lamp, and the current at C- controls the cool tone of the LED lamp. The current flowing through W- and C- is controlled by MOS tubes Q1 and Q2. Therefore, the color temperature control circuit realizes the color temperature control of the LED lamp by controlling the conduction status of MOS tubes Q1 and Q2.

[0029] In this example: See Figure 1 The current detection circuit includes resistor R6, resistor R7, resistor R8, capacitor C1, capacitor C2, amplifier U1, resistor R14, and capacitor C7. The non-inverting end of amplifier U1 is connected to one end of resistor R8 and one end of capacitor C2, the other end of capacitor C2 is grounded, the other end of resistor R8 is connected to the S pole of MOS tube Q1, the inverting end of amplifier U1 is connected to one end of resistor R7, one end of resistor R6, and one end of capacitor C1, the other end of resistor R7 is grounded, the other end of resistor R6 is connected to the other end of capacitor C1, the output end of amplifier U1, and one end of resistor R14. The other end of resistor R14 is connected to one end of capacitor C7 and the color temperature control circuit, and the other end of capacitor C7 is grounded.

[0030] The currents at W- and C- of the LED lamp holder are eventually output to the ground through the resistor R5. Therefore, the voltage feedback on the resistor R5 is the current flowing through the LED lamp holder. The voltage of the resistor R5 is collected and amplified by the amplifier U1, and finally output to the color temperature control circuit through the resistor R14 and capacitor C7.

[0031] In this example: See Figure 1 The color temperature control circuit includes a chip U2 and a switch SW1. The model of the chip U2 is 56P045ASD. Pin 1 of the chip U2 is connected to one end of the capacitor C5 and a 5V voltage, and the other end of the capacitor C5 is grounded. Pin 4 of the chip U2 is connected to the current detection circuit. Pins 5 and 6 of the chip U2 are connected to the LED working circuit. Pin 8 of the chip U2 is grounded. Pin 7 of the chip U2 is connected to one end of the capacitor C6, one end of the resistor R16, and the sixth end of the switch SW1. The other end of the capacitor C6 is grounded, and the other end of the resistor R16 is grounded. The first end to the fifth end of the switch SW1 are respectively connected to a 5V voltage through a resistor.

[0032] Pin 4 of chip U2 receives the output voltage signal from the current detection circuit. Based on the voltage at pin 4, pins 5 and 6 of chip U2 output corresponding PWM signals. Pin 5 outputs a PWM signal to control the on-duty cycle of MOSFET Q1, which controls the current of the warm LEDs. Pin 6 outputs a PWM signal to control the on-duty cycle of MOSFET Q2, which controls the current of the cool LEDs. By controlling the current in the warm and cool LED strings, the color temperature of the LED lights is changed. This allows the color temperature of the LED lights to change with dimming. Switch SW1, a single-pole, five-throw switch, sets the color temperature at maximum brightness based on the different voltages input to pin 7 of chip U2 when different terminals (such as the sixth terminal and the first through fifth terminals) are connected to switch SW1. Based on the detected voltage, chip U2 controls the PWM duty cycle output by pins 5 and 6, thereby setting the color temperature of the LED lights.

[0033] See also Figure 2 In this embodiment, the color temperature of the LED lamp changes from high to low when the brightness ranges from 60% to the minimum. The color temperature remains unchanged when the brightness ranges from 100% to 60%, and the color temperature value is set by the gear position of switch SW1.

[0034] This controller module controls the color temperature by detecting the current of LED lamps. It can be used for various dimming lamps such as thyristor, 0-10V, PWM, etc. It is easy to install and flexible to use.

[0035] The working principle of the utility model is as follows: the power supply circuit is used as a power supply to supply voltage to the current detection circuit and the color temperature control circuit; the LED working circuit is used to receive control of the color temperature control circuit, and the LED lamp emits light during operation; the current detection circuit is used to detect the current flowing through the LED working circuit, convert it into a voltage signal, and feed it back to the color temperature control circuit; the color temperature control circuit is used to adjust the color temperature of the LED working circuit based on the received voltage signal, so that the color temperature of the LED lamp changes with the dimming brightness; the color temperature at maximum brightness is set by a manual switch.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as exemplary and non-restrictive.

[0037] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A LED lamp cold and warm color controller, characterized in that: The LED light warm and cold color controller includes: The power supply circuit is used as a power supply to supply voltage to the current detection circuit and the color temperature control circuit; The LED working circuit is used to receive control from the color temperature control circuit, and the LED lamp emits light when working; The current detection circuit is used to detect the current flowing through the LED working circuit, convert it into a voltage signal, and feed it back to the color temperature control circuit; The color temperature control circuit is used to adjust the color temperature of the LED working circuit based on the received voltage signal, so that the color temperature of the LED lamp changes with the dimming brightness; the color temperature at maximum brightness is set by a manual switch; The power supply circuit is connected to the LED working circuit, the current detection circuit, and the color temperature control circuit. The LED working circuit is connected to the current detection circuit. The current detection circuit is connected to the color temperature control circuit. The color temperature control circuit is connected to the LED working circuit.

2. The LED lamp cold and warm color controller according to claim 1, characterized in that: The power supply circuit includes an LED power supply, a transistor Q3, a resistor R15, a diode ZD1, a capacitor C3, a voltage regulator U3, and a capacitor C4. The LED power supply is connected to the collector of the transistor Q3, one end of the resistor R15, and the LED working circuit. The base of the transistor Q3 is connected to the other end of the resistor R15 and the cathode of the diode ZD1. The anode of the diode ZD1 is grounded. The emitter of the transistor Q3 is connected to one end of the capacitor C3 and the input end of the voltage regulator U3. The other end of the capacitor C3 is grounded. The ground end of the voltage regulator U3 is grounded. The output end of the voltage regulator U3 is connected to one end of the capacitor C4, the current detection circuit, and the color temperature control circuit. The other end of the capacitor C4 is grounded.

3. The LED lamp cold and warm color controller according to claim 1, characterized in that: The LED working circuit includes an LED lamp holder, a MOS transistor Q1, a MOS transistor Q2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, and a resistor R5. The V+ end of the LED lamp holder is connected to the power supply circuit, the W- end of the LED lamp holder is connected to the D pole of the MOS transistor Q1, the C- end of the LED lamp holder is connected to the D pole of the MOS transistor Q2, the G pole of the MOS transistor Q1 is connected to one end of the resistor R1 and one end of the resistor R3, the other end of the resistor R1 is connected to the color temperature control circuit, the G pole of the MOS transistor Q2 is connected to one end of the resistor R2 and one end of the resistor R4, the other end of the resistor R2 is connected to the color temperature control circuit, the S pole of the MOS transistor Q1 is connected to the S pole of the MOS transistor Q2, the other end of the resistor R3, the other end of the resistor R4, one end of the resistor R5, and the current detection circuit, and the other end of the resistor R5 is grounded.

4. The LED lamp cold and warm color controller according to claim 3, characterized in that: The current detection circuit includes resistor R6, resistor R7, resistor R8, capacitor C1, capacitor C2, amplifier U1, resistor R14, and capacitor C7. The non-inverting end of amplifier U1 is connected to one end of resistor R8 and one end of capacitor C2, the other end of capacitor C2 is grounded, the other end of resistor R8 is connected to the S pole of MOS tube Q1, the inverting end of amplifier U1 is connected to one end of resistor R7, one end of resistor R6, and one end of capacitor C1, the other end of resistor R7 is grounded, the other end of resistor R6 is connected to the other end of capacitor C1, the output end of amplifier U1, and one end of resistor R14. The other end of resistor R14 is connected to one end of capacitor C7 and the color temperature control circuit, and the other end of capacitor C7 is grounded.

5. The LED lamp cold and warm color controller according to any one of claims 1, 3, and 4, characterized in that: The color temperature control circuit includes chip U2 and switch SW1. The model of chip U2 is 56P045ASD. Pin 1 of chip U2 is connected to one end of capacitor C5 and 5V voltage, and the other end of capacitor C5 is grounded. Pin 4 of chip U2 is connected to the current detection circuit. Pins 5 and 6 of chip U2 are connected to the LED working circuit. Pin 8 of chip U2 is grounded. Pin 7 of chip U2 is connected to one end of capacitor C6, one end of resistor R16, and the sixth end of switch SW1. The other end of capacitor C6 is grounded, and the other end of resistor R16 is grounded. The first end to the fifth end of switch SW1 are respectively connected to 5V voltage through a resistor.

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