Circuit of high-voltage drive-free colorful LED lamp strip

Abstract

The utility model discloses a circuit of a high-voltage drive-free multicolor LED lamp strip, which comprises a power supply circuit and a lamp strip circuit, the power supply circuit comprises a rectifier module, a main power supply module and a main control module, and the lamp strip circuit comprises a sub power supply module, a plurality of point control modules and a plurality of low-voltage light-emitting modules. The light-emitting module comprises a red light module, a green light module and a blue light module, the input end of the sub-power module is connected to the output end of the rectifier module, the output end of the sub-power module outputs low-voltage direct current, and the point control modules and the light-emitting module are connected to the output end of the sub-power module in parallel. The output ends of the sub power supply modules on every two circuit boards are connected in parallel and jointly supply power to the point control modules and the light-emitting modules in the two circuit boards, each point control module controls one light-emitting module, and signals of the master control module are sequentially transmitted in series through the point control modules. The LED light source has the advantages of small circuit voltage drop, uniform long-distance light emission, flexible shearing and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a LED lamp area circuit, specifically disclose a kind of circuit of high-pressure exempt from drive Fantan LED lamp area. BACKGROUND

[0002] Low-voltage LED lamp area refers to the working voltage of 36V below LED lamp area, contrary, working voltage higher than 36V LED lamp area, can be called high-voltage LED lamp area. Traditional low-voltage LED lamp area, first adopt external power supply to convert 220V alternating current commercial power into low-voltage direct current, then through copper foil circuit on circuit board transmission to multiple control modules and light-emitting module group on circuit board. Light-emitting module group multiple working voltage 3V LED lamp pearl series connection is formed, a light-emitting module is as minimum shear unit, since adopting light-emitting module is low voltage, series lamp area is less, shear size is more flexible. But due to the adoption of low-voltage power supply, and copper foil circuit is thin, voltage drop is larger, the light-emitting module group contained in lamp area reaches certain degree, tail light-emitting module group cannot keep normal work, cause lamp area overall light-emitting uneven. Traditional high-voltage LED lamp area includes multiple circuit boards, LED lamp pearl series connection on each circuit board as an independent light-emitting module group, multiple circuit boards are sleeved in core wire, and power supply wire is arranged in core wire. Traditional high-voltage LED lamp area since adopting wire power supply, solve voltage drop problem to a certain extent, but since the working voltage of each light-emitting module is 220V, it is necessary to adopt more LED lamp pearl series connection, and the length of each light-emitting module on circuit board is longer, and LED lamp area must be cut with integer multiple of the length of light-emitting module, which causes shear size not flexible, inconvenient to use. CONTENT OF UTILITY MODEL

[0003] Therefore, it is necessary to provide a kind of circuit of high-pressure exempt from drive Fantan LED lamp area based on prior art problems, voltage drop is small, long distance brightness is uniform, shear is flexible, convenient to use, and circuit is simple.

[0004] The utility model discloses a kind of circuits of high-voltage drive-free fantasy color LED lamp strips, including power supply circuit and lamp strip circuit, the power supply circuit includes rectifier module, total power module and total control module, the input end of the rectifier module is used to connect alternating current mains, its output end exports 220V high-voltage direct current to the total power module and lamp strip circuit, the total power module exports low-voltage direct current to the total control module;The lamp strip circuit includes one sub power module, multiple point control modules and multiple low-voltage light emitting modules, the light emitting module includes the red light module, green light module and blue light module three light emitting modules formed by a plurality of LED lamp beads in series, the input end of the sub power module is connected to the output end of the rectifier module, its output end exports low-voltage direct current, the multiple point control modules and light emitting modules are connected in parallel to the output end of the sub power module, the output end of the sub power module on every two circuit boards is connected in parallel, and the multiple point control modules and light emitting modules in the two circuit boards are powered in common, every point control module controls three light emitting modules of one light emitting module, and the signal of total control module is sequentially connected in series transmission by the multiple point control modules.

[0005] The utility model has the advantages that: the utility model adopts rectifier circuit to convert high-voltage alternating current mains into high-voltage direct current, and delivers to each sub power circuit on the lamp strip, and then each sub power circuit converts high-voltage direct current into low-voltage direct current and delivers to multiple sub control modules and low-voltage light emitting modules to work, and current is transmitted at high voltage in the lamp strip, so that voltage loss is small;In addition, the light emitting module is a low-voltage module, and the number of lamp beads included is small, and the sub power circuit on every two circuit boards is connected in parallel, so that the sub power circuit of adjacent circuit board can supply power to the light emitting module of the cut sub power circuit after cutting in the interval of any light emitting module on any circuit board, and the cutting size of the lamp strip is more flexible.

[0006] The utility model discloses further improve as follows can be done: the rectifier module is the patch bridge stack, and two direct current output ends including power supply positive pole and power supply negative pole are connected with the first electric capacity between power supply positive pole and power supply negative pole; the total power module includes power supply chip, and power supply chip includes drain foot, feedback foot, power supply foot, source electrode foot, and the drain foot is connected to the power supply positive pole HV, and the source electrode foot is connected to the negative pole of chopping inductance, and the negative pole of chopping inductance is connected to the power supply negative pole through the freewheeling diode, and the power supply foot is connected to the source electrode foot through the second electric capacity, and the feedback foot is connected to the source electrode foot through the first resistance, and is connected to the positive pole of chopping inductance through the second resistance and the second diode in series, and the second resistance is connected to the source electrode foot again through the third electric capacity, and the fourth electric capacity is connected between the chopping inductance and the power supply negative pole; the total control module includes main control singlechip, and the main control singlechip includes positive pole foot, negative pole foot, intermittent mode foot, speed regulation foot, continuous mode foot and signal output foot, and the positive pole foot is connected to the positive pole of the chopping inductance of the total power module and is connected to the power supply negative pole through the parallel third resistance, the fifth electric capacity, and the switch is arranged between the intermittent mode foot or the continuous mode foot and the power supply negative pole, and the negative pole foot is connected to the power supply negative pole, and the fourth resistance is connected on the signal output foot.

[0007] The internal structure of the sub power module and the total power module is same, the chopping inductance of the sub power module is connected to the ground through the third resistance, the third resistance is connected to the power supply negative pole through the diode, and the capacitor is connected between the drain foot and the ground terminal of the sub power module; the point control module includes sub control singlechip, and the sub control singlechip includes positive pole foot, negative pole foot, signal input foot, signal output foot, red light control foot, green light control foot and blue light control foot, and the positive pole foot is connected to the positive pole of the chopping inductance of the sub power module through the fifth resistance and is connected to the power supply negative pole through the sixth electric capacity, and the red light control foot, the green light control foot and the blue light control foot are connected to the negative pole of the three light emitting modules through the sixth resistance, the seventh resistance and the eighth resistance respectively, and the positive pole of the three light emitting modules is connected to the positive pole of the chopping inductance of the sub power module.

[0008] The LED lamp bead is encapsulated with parallel red light chip, green light chip and blue light chip, and the red light module, the green light module and the blue light module are respectively composed of the red light chip, the green light chip and the blue light chip and the resistance of a plurality of LED lamp beads in series; the output voltage of the sub power module is 18V, and the working voltage of the red light module, the green light module and the blue light module is 18V, and is respectively composed of the red light chip, the green light chip and the blue light chip and the resistance of six LED lamp beads in series. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is the structural diagram of power connector of the utility model.

[0010] Figure 2The utility model discloses a structure schematic diagram of LED lamp strip.

[0011] Figure 3 The utility model discloses a circuit principle diagram.

[0012] Figure 4 The utility model discloses a power supply circuit diagram.

[0013] Figure 5 The utility model discloses a circuit board structure schematic diagram of two sections parallel power supply one.

[0014] Figure 6 The utility model discloses a circuit board structure schematic diagram of two sections parallel power supply two.

[0015] Figure 7 The utility model discloses a circuit diagram on the circuit board of two sections parallel power supply. Specific implementation

[0016] In order to further understand the characteristics, technical means and the specific purpose, function reached of the utility model, the utility model is described in further detail below by combining with the drawings and specific implementation. In the following description, when a certain electronic component is mainly used as a power consumption component, the positive electrode is the current inflow end, and the negative electrode is the current outflow end. When a certain electronic component is mainly used as a power supply component, the positive electrode is the current outflow end, and the negative electrode is the current inflow end.

[0017] Reference Figure 1 And Figure 2 A high-voltage drive-free color-changing LED lamp strip, comprising a power connector 1 and an LED lamp strip 2. One end of the power connector 1 is connected with a controller 11, and the controller 11 is provided with a power circuit. The other end of the power connector 1 is provided with a lamp strip groove 12, and the lamp strip groove 12 is provided with three plug pins 13 electrically connected with the controller 11. The LED lamp strip 2 comprises an outer skin 21, the outer skin 21 is provided with a core wire 22, the core wire 22 is provided with three wires 23, the core wire 22 is installed with a plurality of circuit boards 24, and the circuit boards 24 are provided with a plurality of color LED lamp beads 25. The LED lamp strip 2 is installed in the lamp strip groove 1, and the three plug pins 13 are inserted into the LED lamp strip 2 and electrically connected with the three wires 23 respectively, so as to transmit the current and signal of the controller to the LED lamp strip. The working voltage of the color LED lamp bead is 3V, and it is encapsulated with three light-emitting chips of a red light chip, a green light chip and a blue light chip in parallel. Every six color LED lamp beads are connected in series to form a light-emitting module 250. The light-emitting module 250 comprises a red light module 25R, a green light module 25G and a blue light module 25B with a working voltage of 18V, which are respectively connected in series by the red light chip, the green light chip and the blue light chip in the six color LED lamp beads. Of course, by adjusting the number of the connected lamp beads, the working voltage of the three light-emitting modules can also be 12V, 24V or 36V, etc.

[0018] Reference Figure 3 And Figure 4 The power supply circuit on the power supply connector includes a rectifier module DB, a total power supply module S1 and a total control module M1. The rectifier module DB converts 220V AC power supply into 220V DC power supply, which is output to the total power supply module S1. The total power supply module S1 converts 220V DC power supply into stable 5V DC power supply for the total control module M1. The total control module M1 is provided with a control program and a signal output end.

[0019] The rectifier module DB is a patch bridge stack, which has two AC input ends and two DC output ends, including a power supply positive pole HV+ and a power supply negative pole HV-. The two AC input ends are used to connect to the power supply, and the power supply positive pole HV+ and the power supply negative pole HV- are connected with a first capacitor C1.

[0020] The total power supply module S1 includes a power supply chip IC, which includes a drain foot DIN, a feedback foot FB, a power supply foot VCC and a source foot S. The drain foot DIN is connected to the power supply positive pole HV+. The drain foot DIN is the source connection point of the built-in power MOS tube in the chip, which is used for starting the power supply chip and providing internal operating current. The source foot S is connected to the negative pole of an inductor L, and the negative pole of the chopper inductor L is connected to the power supply negative pole HV- through a continuous conduction diode D1. The source foot S is the source connection point of the built-in MOS tube in the chip, which is also the grounding reference of the bypass and feedback foot FB. The chopper inductor L is used to output 5V DC power supply for the main control single-chip microcomputer U1. The power supply foot VDD is connected to the source foot S through a second capacitor C2, which provides power supply after the power supply chip is started. The feedback foot FB is connected to the source foot S through a first resistor R1, and is connected to the positive pole of the chopper inductor L through a second resistor R3 and a second diode D2 in series, and the second resistor R2 is connected to the source foot S through a third capacitor C3. The second resistor R1 and the second resistor R2 are the comparison sampling resistors of the feedback foot FB. By adjusting the voltage division ratio of the first resistor and the second resistor and the inductance of the chopper inductor, the output voltage of the power supply module can be adjusted. The third capacitor C3 prevents the sampling signal from being disturbed by the peak voltage and ripple voltage, and the second diode D2 prevents the sampling signal and the subsequent circuit from interfering with each other. The chopper inductor L is connected with a fourth capacitor C4 and a third resistor R3 in parallel between the chopper inductor L and the power supply negative pole HV-.

[0021] The total control module M1 includes a main control single-chip microcomputer U1, the main control single-chip microcomputer U1 includes a positive electrode foot VDD, a negative electrode foot GND, a discontinuous mode foot LM, a speed adjustment foot SP, a continuous mode foot CM and a signal output foot DAT. The positive electrode foot VDD is connected to the positive electrode of the chopping inductor L of the total power module, and is connected to the power supply negative electrode HV- through the third resistor R3 and the fifth capacitor C5 in parallel. The switch K is arranged between the discontinuous mode foot LM or the continuous mode foot CM and the power supply negative electrode HV-. The negative electrode foot GND is connected to the power supply negative electrode HV-. The fourth resistor R4 is connected to the signal output foot DAT.

[0022] Reference Figures 5 to 7 The circuit on each circuit board includes a sub power module S2, a plurality of point control modules M2 and a plurality of light emitting modules 250. The sub power module S2 has the same internal structure as the total power module S1, the chopping inductor L of the sub power module S2 is grounded through the third resistor R3, the third resistor R3 is connected to the power supply negative electrode HV- through the diode D; the capacitor C is connected between the drain electrode foot DIN and the ground terminal of the sub power module S2; the chopping inductor L outputs 18V direct current to supply the plurality of point control modules M2 and the light emitting modules 250 to work. Each point control module M2 includes three output control terminals, which respectively control three light emitting modules in one light emitting module 250. The output terminals of the sub power modules S2 on every two circuit boards 24 are connected in parallel, and the plurality of point control modules M2 and the light emitting modules 250 on the two circuit boards are supplied with power. That is, the sub power modules S2 on the odd circuit board 241 with odd serial numbers and the sub power modules S2 on the even circuit board 242 with even serial numbers are connected in parallel from the first end of the LED lamp strip, and so on. The first end and the second end of the two circuit boards 241 / 242 are connected through the conductor such as the tin paste or the lead wire. Of course, all the sub power modules S2 on the LED lamp strip can be connected in parallel to supply all the point control modules M2 with power, but in this way, all the circuit boards need to be connected, and the welding amount of the spliced boards is large. In the present application, only the sub power modules S2 of the adjacent two circuit boards are connected in parallel, which can cut in each light emitting module 250 interval and simplify the manufacturing process of the lamp strip.

[0023] Reference Figure 5 If the rectifier module DB and the sub power module S2 are both arranged at the left end of the circuit board, when the cutting position falls in the odd circuit board 241, all the light emitting modules 250 at both ends of the cutting position have circuit conduction and can be normally used; when the cutting position falls in the even circuit board 242, the light emitting modules 250 on the right side of the even circuit board 242 cannot be lighted because they have no circuit conduction, therefore, the present embodiment can only achieve conditional flexible cutting of the LED lamp strip. As a further improvement of the present application, reference Figure 6The rectifier module DB and the sub power supply module S2 are arranged at the non-splicing end of the circuit board 24, that is, on the odd circuit board 241, the rectifier module DB and the sub power supply module S2 are arranged at the head end of the circuit board; on the even circuit board 242, the rectifier module DB and the sub power supply module S2 are arranged at the tail end of the circuit board, and the tail end of the odd circuit board 241 is spliced with the head end of the even circuit board 242. In this way, no matter where the cutting position falls on the odd circuit board 241 or the even circuit board 242, all the light emitting modules 250 at both ends of the cutting position have circuit conduction, and the cutting position is more flexible.

[0024] The point control module M2 comprises a sub control single-chip microcomputer U2, the sub control single-chip microcomputer U2 comprises a positive electrode pin VDD, a negative electrode pin GND, a signal input pin DAT / DAT2, a signal output pin DOUT, a red light control pin R, a green light control pin G and a blue light control pin B. The positive electrode pin VDD is connected to the positive electrode of the chopper inductor L through the fifth resistor R5 and connected to the power supply negative electrode HV- through the sixth capacitor C6. The red light control pin R, the green light control pin G and the blue light control pin B are connected to the negative electrodes of the red light module 25R, the blue light module 25G and the blue light module 25B through the sixth resistor R6, the seventh resistor R7 and the eighth resistor R8 respectively, and the positive electrodes of the red light module 25R, the blue light module 25G and the blue light module 25B are connected to the positive electrode of the chopper inductor L. The negative electrode pin GND is connected to the power supply negative electrode HV-. The signal input pin and the signal output pin of the sub control single-chip microcomputer U2 are connected in series through resistors R in sequence, wherein the signal input pin of the first sub control single-chip microcomputer U2 located at the end of the LED lamp strip is connected to the signal output pin of the master control single-chip microcomputer in the power supply circuit through the ninth resistor R9, and the control signal of the master control module is transmitted through each sub control single-chip microcomputer in sequence.

[0025] The utility model discloses a rectifier circuit is used to convert high-voltage alternating current commercial power into high-voltage direct current, and the high-voltage direct current is transported to the sub power supply circuit on each circuit board in the LED lamp strip through the wire in the LED lamp strip, and then the high-voltage direct current is converted into low-voltage direct current by each sub power supply circuit and is transported to the multiple sub control modules and low-voltage light emitting module groups to work, and the current is transmitted at high voltage in the lamp strip, so the voltage loss is small. Since the sub power supply modules on every two circuit boards are connected in parallel to supply power, no matter where the cutting position falls in any light emitting module interval of any circuit board, the sub power supply module on another circuit board connected in parallel can supply power to the remaining point control modules and light emitting module groups in the cut circuit board. Since the light emitting module group is a low-voltage module group, the LED lamp beads contained in the light emitting module group are less, and the light emitting module group is shorter, so the cutting size of the LED lamp strip is more flexible. Since the sub power supply module is arranged on the circuit board of the LED lamp strip, no driving power supply is needed in the power supply connector, and the lamp strip is more convenient to use.

[0026] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It is pointed out that for ordinary skilled person in the art, without departing from the utility model concept, still can make several deformation and improvement, these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be accurate with the attached claims.

Claims

1. A circuit of a high-voltage driver-free color-changing LED light strip, comprising a power supply circuit and a light strip circuit, characterized in that: The power supply circuit comprises a rectifier module, a total power module and a total control module, the input end of the rectifier module is used for connecting AC mains, the output end outputs 220V high-voltage direct current to the total power module and the lamp strip circuit, the total power module outputs low-voltage direct current to the total control module; the lamp strip circuit comprises a sub-power module, a plurality of point control modules and a plurality of low-voltage light emitting modules, the light emitting module comprises three light emitting modules of a red light module, a green light module and a blue light module which are connected in series by a plurality of LED lamp beads, the input end of the sub-power module is connected to the output end of the rectifier module, and the output end outputs low-voltage direct current, the plurality of point control modules and the light emitting module are connected in parallel to the output end of the sub-power module, the output ends of the sub-power modules on every two circuit boards are connected in parallel, and the plurality of point control modules and the light emitting module in the two circuit boards are powered in common, each point control module controls three light emitting modules of a light emitting module, and the signals of the total control module are transmitted in series through the plurality of point control modules. 2.The circuit of a high-voltage driverless color-changing LED lamp strip of claim 1, wherein: The rectifier module is a patch bridge, two direct current output ends of the rectifier module comprise a power supply positive electrode and a power supply negative electrode, and a first capacitor is connected between the power supply positive electrode and the power supply negative electrode; the total power module comprises a power supply chip, the power supply chip comprises a drain electrode, a feedback electrode, a power supply electrode and a source electrode, the drain electrode is connected to the power supply positive electrode HV, the source electrode is connected to the negative electrode of a chopping inductor, the negative electrode of the chopping inductor is connected to the power supply negative electrode through a freewheeling diode, the power supply electrode is connected to the source electrode through a second capacitor, the feedback electrode is connected to the source electrode through a first resistor, and the feedback electrode is connected to the positive electrode of the chopping inductor through a second resistor and a second diode connected in series, the second resistor is connected to the source electrode through a third capacitor, and a fourth capacitor is connected between the chopping inductor and the power supply negative electrode; the total control module comprises a master control single-chip microcomputer, the master control single-chip microcomputer comprises a positive electrode, a negative electrode, a discontinuous mode electrode, a speed adjustment electrode, a continuous mode electrode and a signal output electrode, the positive electrode is connected to the positive electrode of the chopping inductor of the total power module and connected to the power supply negative electrode through a third resistor and a fifth capacitor connected in parallel, a switch is arranged between the discontinuous mode electrode or the continuous mode electrode and the power supply negative electrode, the negative electrode is connected to the power supply negative electrode, and a fourth resistor is connected to the signal output electrode. 3.The circuit of a high-voltage driverless color-changing LED lamp strip of claim 2, wherein: The internal structure of the sub-power module is the same as that of the total power module, the chopping inductor of the sub-power module is connected to the ground through a third resistor, the third resistor is connected to the power supply negative electrode through a diode, and a capacitor is connected between the drain electrode and the ground end of the sub-power module; the point control module comprises a sub-control single-chip microcomputer, the sub-control single-chip microcomputer comprises a positive electrode, a negative electrode, a signal input electrode, a signal output electrode, a red light control electrode, a green light control electrode and a blue light control electrode, the positive electrode is connected to the positive electrode of the chopping inductor of the sub-power module through a fifth resistor and connected to the power supply negative electrode through a sixth capacitor, the red light control electrode, the green light control electrode and the blue light control electrode are respectively connected to the negative electrodes of the three light emitting modules through a sixth resistor, a seventh resistor and an eighth resistor, and the positive electrodes of the three light emitting modules are connected to the positive electrode of the chopping inductor of the sub-power module.

4. The circuit of high-voltage driverless color-changing LED light strip of claim 1, wherein: The LED lamp bead is encapsulated with parallel red light chip, green light chip and blue light chip, and the red light module, green light module and blue light module are respectively composed of a plurality of LED lamp bead red light chip, green light chip and blue light chip and resistance in series.

5. The circuit of high-voltage driverless color-changing LED light strip according to claim 4, wherein: The output voltage of the sub-power module is 18V, the working voltage of the red light module, green light module and blue light module is 18V, and the red light module, green light module and blue light module are respectively composed of six LED lamp bead red light chip, green light chip and blue light chip and resistance in series.

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