CN201160333Y - Lighting lamp color temperature adjustment circuit - Google Patents

Abstract

The utility model discloses a color temperature adjustment circuit of a lighting fixture, which comprises a switching power supply connected with the mains, a constant current module connected with the switching power supply, a high color temperature light emitting module and a low color temperature light emitting module connected with the constant current module, and a constant current light emitting module connected with the constant current module. The flow module is controlled by a microcomputer controller connected with a signal receiver. Since the circuit is used to adjust the luminous intensity of the two light-emitting components with high and low color temperatures to adjust the color temperature of the lamp, it has the advantages of low cost and simple technology compared with the color temperature adjustment method on the packaging level. The color temperature difference is determined, and the adjustable range is large.

Description

Lighting lamp color temperature adjustment circuit

technical field

The utility model relates to a circuit, in particular to a color temperature adjustment circuit of a lighting fixture.

Background technique

The latest research shows that the color temperature of light is closely related to people's mood, and people's mood will change with the color temperature of light. Therefore, the development of home lighting fixtures with adjustable color temperature has always been a strong demand of consumers. Through the search of the existing technology, we found that one of the patent numbers: 200520134051.X "Adjustable color temperature table lamp" proposed this design concept, but in terms of the realization method of color temperature adjustment, the patent only mentioned one color temperature The adjustment button does not reveal the specific device or circuit for its color temperature control. The publication number is: CN1929710A "White Light Emitting Device with Adjustable Color Temperature" discloses a method for adjusting the color temperature. The main point of the method is to use a blue chip covered with green fluorescent powder and a red chip to generate white light. An adjustable resistor is connected to the light chip, and the brightness of the red chip is controlled by controlling the adjustable resistor to control the color temperature of the white light. This technology needs to operate the electronic components at the packaging level, and the technical threshold is relatively high. The current is very small, and the color temperature adjustment range of this method is also very limited.

Contents of the invention

A technical problem to be solved by the utility model is to provide a color temperature adjustment circuit for lighting fixtures with low technical cost and a large color temperature adjustment range.

The utility model solves the above-mentioned technical problems through the following technical solutions:

A lighting fixture color temperature adjustment circuit, including a switching power supply connected to the mains, a constant current module connected to the switching power supply, a high color temperature light emitting module and a low color temperature light emitting module connected to the constant current module, the constant current module is controlled by a microcomputer Controller control, the microcomputer controller is connected with a signal receiver.

Since the circuit is used to adjust the luminous intensity of the two light-emitting components with high and low color temperatures to adjust the color temperature of the lamp, it has the advantages of low cost and simple technology compared with the color temperature adjustment method on the packaging level. The color temperature difference is determined, and the adjustable range is large.

Preferably, the constant current module includes a high color temperature module and a low color temperature module, and the high color temperature module and the low color temperature module are respectively connected to the high color temperature light emitting module and the low color temperature light emitting module.

Preferably, the high color temperature module and the low color temperature module include a constant current IC, and the constant current IC controls the light emitting module by adjusting the current pulse frequency or pulse width.

Preferably, the signal receiver is controlled by a remote controller.

Description of drawings

Fig. 1 is a circuit structure block diagram of the present utility model;

Fig. 2 is a switching power supply circuit diagram of the present utility model;

Fig. 3 is the circuit diagram of the control panel of the present utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Referring to Fig. 1, the utility model includes a switching power supply 1 connected to the mains, a constant current module 2 connected to the switching power supply 1, high color temperature and low color temperature light emitting modules 6 and 7 connected to the constant current module, and a constant current module 2 The microcomputer controller 3 is controlled, and the microcomputer controller 3 is connected with a signal receiver 4 .

Referring to Fig. 1 and Fig. 2, the switching power supply 1 converts high-voltage alternating current into low-voltage direct current; the constant-current module 2 includes a high-color-temperature constant-current module 21 and a low-color-temperature constant-current module 22, and the high-color-temperature constant-current module 21 is connected to a high-color-temperature light-emitting module The low color temperature constant current module 22 is connected to the low color temperature light-emitting module; the high and low color temperature modules 21, 22 each include a constant current IC 23, and the constant current IC 23 receives the control signal output by the microcomputer controller 3 and detects it through the sampling resistor R3 Output the current of the light-emitting module, and finally control the output current by adjusting the pulse frequency of the output current through the current switch. Of course, other constant current ICs can also be used to adjust the output current by adjusting the current pulse width; the microcomputer controller 3 includes a control chip 31, The voltage regulator IC 32 and the clock 33, the control chip 31 receives the control signal from the signal receiver 4, and outputs the control signal to the constant current IC 23 in the high and low color temperature modules 21 and 22 after processing; the signal receiver 4 is an infrared receiver to accept the control of the infrared remote control.

Claims (4)

1, a kind of lighting colour temperature regulating circuit, it is characterized in that: comprise the Switching Power Supply that is electrically connected with the city, the constant flow module that is connected with Switching Power Supply, high colour temperature illuminating module that is connected with constant flow module and low colour temperature illuminating module, constant flow module is controlled by microcomputer controller, and microcomputer controller is connected with signal receiver.

2, a kind of lighting colour temperature regulating circuit according to claim 1, it is characterized in that: described constant flow module comprises high colour temperature module and low colour temperature module, and high colour temperature module is connected with low colour temperature illuminating module with high colour temperature illuminating module respectively with low colour temperature module.

3, a kind of lighting colour temperature regulating circuit according to claim 2 is characterized in that: comprise a constant current IC in described high colour temperature module and the low colour temperature module, this constant current IC controls illuminating module by regulating current pulse frequency or pulsewidth.

4, a kind of lighting colour temperature regulating circuit according to claim 1, it is characterized in that: described signal receiver is controlled by remote controller.

Images