Circuit for controlling color change of lamp strip through direct-current switch

Abstract

The utility model discloses a direct current switch control lamp strip color changing circuit comprising a lamp strip provided with yellow light lamp beads and white light lamp beads, the lamp strip is provided with a switch control circuit, and the switch control circuit comprises a power supply input end, a control switch, an energy storage voltage stabilizing circuit, a control chip, a detection circuit and two drive circuits; the power input end is connected with the power end of the control chip through the control switch and the energy storage voltage stabilizing circuit. The two driving circuits are respectively connected with two PWM output pins of the control chip, and the detection circuit is arranged between the control switch and the energy storage voltage stabilizing circuit and is connected with a detection pin of the control chip. According to the utility model, the structure arrangement is reasonable, the rapid switching of the control switch can influence the voltage change of the detection circuit and the detection of the switch state, the control of the output state of the two PWM output pins is realized through the control chip, the color temperature matching output of the white light lamp bead and the yellow light lamp bead is realized, and the stability and effectiveness of color change control are improved.

Description

Technical Field

[0001] This utility model belongs to the field of LED strip color-changing technology, specifically relating to a DC switch-controlled LED strip color-changing circuit. Background Technology

[0002] LED strips are a common lighting and decorative structure. To improve their lighting and decorative effects, they often use multi-color LED chips. Therefore, in practical applications, it is necessary to adjust and control the color change of the LED strip. In existing technologies, the color change control of the LED strip is mostly achieved by using a driver. Although this can achieve the color change adjustment of the LED strip, it requires a corresponding driver chip and driver circuit, which greatly increases the design and manufacturing costs and also affects the stability of the color change control, thus limiting its applicability. Utility Model Content

[0003] The purpose of this invention is to provide a DC switch-controlled LED strip color-changing circuit with a reasonable structural design that is conducive to improving the stability of color changing.

[0004] The technical solution to achieve the purpose of this utility model is a DC switch-controlled light strip color-changing circuit, which includes a light strip with yellow light beads and white light beads. The light strip is provided with a switch control circuit, which includes a power input terminal, a control switch, an energy storage voltage regulator circuit, a control chip, a detection circuit and two drive circuits.

[0005] The power input terminal is connected to the power terminal of the control chip through a control switch and an energy storage voltage regulator circuit;

[0006] The two drive circuits are connected to the two PWM output pins of the control chip, and the outputs of the two drive circuits are connected to the white LED and the yellow LED, respectively.

[0007] The detection circuit is located between the control switch and the energy storage voltage regulator circuit, and is connected to the detection pin of the control chip.

[0008] A further preferred embodiment is that the energy storage and voltage regulation circuit includes a large energy storage capacitor and a Zener diode.

[0009] A further preferred embodiment is that the detection circuit includes a first resistor, a second resistor, and a second unidirectional diode;

[0010] The first resistor and the second resistor are connected in series, with one end of the series connection connected to the connection point between the control switch and the energy storage voltage regulator circuit, and the other end grounded.

[0011] The negative terminal of the second unidirectional diode is connected to the connection point of the first resistor and the second resistor, and the positive terminal is connected to the detection pin of the control chip.

[0012] A further preferred embodiment is that the driving circuit includes a transistor, a sixth resistor, and a seventh resistor;

[0013] The base of the transistor is connected to the PWM output pin of the control chip via a sixth resistor;

[0014] The seventh resistor is connected between the base and emitter of the transistor, and the emitter is grounded;

[0015] The collector of the transistor is connected to a white LED or a yellow LED.

[0016] This invention has several advantages: Its structure is rationally designed, incorporating a control switch, a control chip, an energy storage and voltage regulation circuit, and a detection circuit. During use, the rapid switching of the control switch affects the voltage change in the detection circuit. The energy storage and discharge delay time of the energy storage and voltage regulation circuit is then used to detect the switch state. The control chip controls the output state of the two PWM output pins, enabling the color temperature matching output of white and yellow LEDs. This improves the stability and effectiveness of color-changing control, reduces the use of electronic components, lowers processing costs, and has strong applicability. Attached Figure Description

[0017] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the circuit structure of this utility model.

[0020] Figure reference numerals: 1. Yellow LED bead; 2. White LED bead; 3. LED strip; 4. Switch control circuit; 41. Power input terminal; 42. Control switch; 43. Energy storage and voltage regulation circuit; 44. Control chip; 45. Detection circuit; 46. Drive circuit. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] See the example. Figure 1 and Figure 2As shown, a DC switch-controlled light strip color-changing circuit includes a light strip 3 with yellow LED beads 1 and white LED beads 2. The light strip is equipped with a switch control circuit 4. In this embodiment, the switch control circuit is set on the light strip and no additional control structure is required. At the same time, the yellow LED beads and white LED beads can be single or multiple connected in series.

[0023] In this embodiment, the switch control circuit includes a power input terminal 41, a control switch 42, an energy storage and voltage regulation circuit 43, a control chip 44, a detection circuit 45, and two drive circuits 46; the voltage of the power input terminal is 12V. The control chip incorporates a filtering algorithm to effectively eliminate switch bounce and achieve more reliable switch detection. During connection, the power input terminal is connected to the power supply terminal of the control chip via the control switch and the energy storage and voltage regulation circuit. The two drive circuits are respectively connected to the two PWM output pins of the control chip, and their outputs are respectively connected to a white LED and a yellow LED. The detection circuit is positioned between the control switch and the energy storage and voltage regulation circuit and is connected to the detection pin of the control chip. The energy storage and voltage regulation circuit can achieve voltage regulation and energy storage, and can achieve an energy discharge delay time when the switch is open. By detecting the level change of the detection circuit, the control chip can control and adjust the output of the two PWM output pins.

[0024] In this embodiment, the energy storage and voltage regulation circuit includes a large energy storage capacitor C6 and a Zener diode Z1. One end of the large energy storage capacitor and the Zener diode are grounded, and the other end is connected to the power supply. When the control switch is off, the large energy storage capacitor can achieve a discharge delay time.

[0025] In practical applications, the detection circuit includes a first resistor R1, a second resistor R2, and a second unidirectional diode D2. During connection, the first and second resistors are connected in series, with one end connected to the connection point between the control switch and the energy storage voltage regulator circuit, and the other end grounded. The cathode of the second unidirectional diode is connected to the connection point of the first and second resistors, and the anode is connected to the detection pin of the control chip. When the switch is activated, the voltage level at the detection point of the second unidirectional diode changes, thus detecting the switch state and triggering the control chip to control and adjust the PWM output.

[0026] In this embodiment, the driving circuit 61 includes a transistor Q3, a sixth resistor R6, and a seventh resistor R7. During connection, the base of the transistor is connected to the PWM output pin of the control chip via the sixth resistor; the seventh resistor is connected between the base and emitter of the transistor, and the emitter is grounded; the collector of the transistor is connected to a white or yellow LED. The other driving circuit has the same structure as the above-described driving circuit.

[0027] This invention has several advantages: Its structure is rationally designed, incorporating a control switch, a control chip, an energy storage and voltage regulation circuit, and a detection circuit. During use, the rapid switching of the control switch affects the voltage change in the detection circuit. The energy storage and discharge delay time of the energy storage and voltage regulation circuit is then used to detect the switch state. The control chip controls the output state of the two PWM output pins, enabling the color temperature matching output of white and yellow LEDs. This improves the stability and effectiveness of color-changing control, reduces the use of electronic components, lowers processing costs, and has strong applicability.

[0028] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural parts described in the instruction manual can also be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0029] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A DC switch-controlled color-changing circuit for a light strip, comprising a light strip equipped with yellow LEDs and white LEDs, wherein the light strip is provided with a switch control circuit, characterized in that: The switch control circuit includes a power input terminal, a control switch, an energy storage voltage regulator circuit, a control chip, a detection circuit, and two drive circuits. The power input terminal is connected to the power terminal of the control chip through a control switch and an energy storage voltage regulator circuit; The two drive circuits are connected to the two PWM output pins of the control chip, and the outputs of the two drive circuits are connected to the white LED and the yellow LED, respectively. The detection circuit is located between the control switch and the energy storage voltage regulator circuit, and is connected to the detection pin of the control chip.

2. The DC switch-controlled color-changing circuit for LED strips according to claim 1, characterized in that: The energy storage and voltage regulation circuit includes a large energy storage capacitor and a Zener diode.

3. The DC switch-controlled color-changing circuit for LED strips according to claim 1, characterized in that: The detection circuit includes a first resistor, a second resistor, and a second unidirectional diode; The first resistor and the second resistor are connected in series, with one end of the series connection connected to the connection point between the control switch and the energy storage voltage regulator circuit, and the other end grounded. The negative terminal of the second unidirectional diode is connected to the connection point of the first resistor and the second resistor, and the positive terminal is connected to the detection pin of the control chip.

4. The DC switch-controlled color-changing circuit for a light strip according to claim 1, characterized in that: The driving circuit includes a transistor, a sixth resistor, and a seventh resistor; The base of the transistor is connected to the PWM output pin of the control chip via a sixth resistor; The seventh resistor is connected between the base and emitter of the transistor, and the emitter is grounded; The collector of the transistor is connected to a white LED or a yellow LED.

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