Circuit structure of high-voltage drive-free stroboflash-free monochromatic LED lamp strip

Abstract

The utility model discloses a circuit structure of a high-voltage drive-free stroboflash-free monochromatic LED (light-emitting diode) lamp strip, which comprises a plurality of sections of circuit boards, a rectifier module, a power supply module and a plurality of light-emitting modules are arranged on the circuit boards, the input end of the rectifier module is connected to a live wire circuit and a zero line circuit, and the output end of the power supply module is connected to the zero line circuit. The rectification module converts 220V alternating current mains supply into 220V direct current and outputs the 220V direct current to the power supply module, the power supply module converts the 220V direct current into low-voltage direct current and outputs the low-voltage direct current to the plurality of low-voltage light-emitting modules, each light-emitting module comprises a plurality of LED lamp beads with the working voltage of 3V which are connected in series, and the plurality of light-emitting modules are connected to the output end of the power supply module in parallel. The power modules on every two circuit boards are connected in parallel to supply power to all the light-emitting modules on the two circuit boards, and the head ends and the tail ends of the two circuit boards are connected in a spliced mode through conductors. The circuit has the advantages of low circuit voltage drop, flexible shearing position and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of LED lamp circuit, specifically disclose a kind of circuit structure of high-voltage drive-free no stroboscopic monochrome LED lamp strip. BACKGROUND

[0002] Low-voltage LED lamp strip refers to the working voltage of 36V below LED lamp strip, contrary, the working voltage of more than 36V LED lamp strip, can be called high-voltage LED lamp strip. Traditional low-voltage LED lamp strip, adopt external power supply to convert 240V alternating city power into low-voltage direct current, is transmitted to multiple light emitting modules by copper foil circuit on circuit board. The working voltage of light emitting module is below 36V, is connected by a plurality of working voltage 3V LED lamp bead series connection, a light emitting module as minimum shear unit. Since adopting low-voltage power supply, copper foil circuit on circuit board is relatively thin, voltage drop is relatively large, the length (light emitting module quantity) of lamp strip reaches certain degree, tail light emitting module cannot maintain normal work, causes uneven light emission of lamp strip overall. Traditional high-voltage LED lamp strip includes multiple circuit boards, the LED lamp bead on each circuit board is all connected in series to form light emitting module with working voltage 220V, multiple circuit boards are sleeved in core wire, and power supply wire is arranged in core wire. Traditional high-voltage LED lamp strip solves voltage drop problem to a certain extent due to wire power supply, but since the working voltage of each light emitting module is 240V, it is necessary to adopt more LED lamp beads in series, the length of light emitting module on circuit board is relatively long, and LED lamp strip must be with a light emitting module as minimum shear unit, which causes that the shear size of lamp strip is not flexible, and it is inconvenient to use. CONTENT OF UTILITY MODEL

[0003] Therefore, it is necessary to provide a kind of circuit structure of high-voltage drive-free no stroboscopic monochrome LED lamp strip based on the prior art problems, with small voltage drop, long-distance brightness uniformity, flexible shear, convenient to use and simple circuit.

[0004] To solve the prior art problems, the utility model discloses a kind of circuit structure of high-voltage drive-free no stroboscopic monochrome LED lamp strip, including multiple circuit boards, rectifier module, power module and multiple light emitting modules are provided on the circuit board, the input end of rectifier module is connected to live circuit and zero line circuit, rectifier module converts 220V alternating city power into 220V direct current and exports to the power module, the power module converts 220V direct current into low-voltage direct current and exports to the multiple light emitting modules, the light emitting module includes a plurality of series-connected LED lamp beads, multiple light emitting modules are connected in parallel to the output end of the power module, the power module on every two circuit boards is connected in parallel to supply power to all light emitting modules on the two circuit boards, and the first end and the last end of the two circuit boards are connected by conductor and are conducted.

[0005] The utility model discloses beneficial effect is: the utility model discloses adopt 220V high pressure transmission in LED lamp area, circuit voltage loss is little, and because the high voltage alternating current is converted into low voltage direct current for each parallel light emitting module work through rectifier module and power module on the circuit board, and the power module on every two circuit boards is parallel to supply power for all light emitting modules on the two circuit boards, and the lamp area can take one light emitting module in the circuit board as the minimum shear unit, and the light emitting module contains the less LED lamp pearl quantity, and the shear unit is short, and the shear size is more flexible.

[0006] The utility model discloses further improvement can be as follows: the rectifier module is the patch bridge heap, and the patch bridge heap has two alternating current input ends and two direct current output ends, two alternating current input ends are connected to live wire circuit and zero line circuit, two direct current output ends include power supply positive pole and power supply negative pole, and first capacitor is connected between power supply positive pole and power supply negative pole, the power module includes power supply chip, and power supply chip includes drain foot, feedback foot, power supply foot, source electrode foot, drain foot is connected to power supply positive pole, source electrode foot is connected to the negative pole of chopping inductance, and the negative pole of chopping inductance is connected to power supply negative pole through freewheeling diode, power supply foot is connected to source electrode foot through second capacitor, feedback foot is connected to source electrode foot through first resistance, and is connected to the positive pole of chopping inductance through the series connection of second resistance and second diode, and second resistance is connected to source electrode foot through third capacitor, and the positive pole of chopping inductance is connected with parallel electrolytic capacitor and third resistance between power supply negative pole, the positive pole of light emitting module is connected to the positive pole of chopping inductance, and the negative pole of light emitting module is connected to power supply negative pole, and the positive pole of chopping inductance and power supply negative pole on two circuit boards are electrically connected respectively, the rectifier module and power module on two circuit boards are set up in the non-splicing one end of circuit board, live wire circuit and zero line circuit are wire, the working voltage of light emitting module is 18V, and is connected in series with six LED lamp pearls and resistance of 3V working voltage. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 It is the structure schematic drawing of the utility model LED lamp area.

[0008] Figure 2 It is the structure schematic drawing of two parallel power supply circuit boards of the utility model.

[0009] Figure 3 It is the structure schematic drawing of two parallel power supply circuit boards of the utility model.

[0010] Figure 4 It is the circuit principle drawing of the utility model.

[0011] Figure 5 It is the circuit diagram of two parallel power supply circuit boards of the utility model. DETAILED DESCRIPTION

[0012] In order to further understand the features, technical means and specific purposes and functions achieved by the utility model, the utility model will be described in further detail below in combination with the drawings and specific embodiments. In the following description, when a certain electronic component is mainly used as a power consumption component, its current inflow end is the positive electrode and its current outflow end is the negative electrode; when a certain electronic component is mainly used as a power supply component, its current outflow end is the positive electrode and its current inflow end is the negative electrode.

[0013] Reference Figure 1 The utility model provides a high pressure exempt from driving no stroboscopic monochrome LED lamp area, including the skin 1, the skin 1 is provided with the core line 2, is provided with two wires 3 in the core line 2, installs multiple circuit boards 4 in the core line 2, is provided with LED lamp pearl 5 on the circuit board 4. Circuit board 4 is electrically connected with wire 3 through lead wire 6.

[0014] Reference Figures 2 to 4 The circuit on each circuit board includes rectifier module DB, power module S and multiple light emitting modules 50. The input end of the rectifier module DB is connected to the wires 13 as the live circuit and the neutral circuit, converting 220V AC mains into 220V high-voltage DC output to the power module S. The power module S converts 220V DC into 18V low-voltage DC output to the multiple light emitting modules 50. The working voltage of the light emitting module 50 is 18V, which is connected in series with six LED lamp pearls 5 with a working voltage of 3V and a resistor R. The multiple light emitting modules 50 are connected in parallel to the output end of the power module S. By adjusting the number of LED lamp pearls 5 connected in series, the working voltage of the light emitting module 50 can also be 12V or 24V or 36V. The power modules S on every two circuit boards are connected in parallel to supply power to all the light emitting modules 50 on the two circuit boards, that is, starting from the first end of the LED lamp area, the power modules S on the odd circuit board 41 with odd serial numbers and the even circuit board 42 with even serial numbers are connected in parallel, and so on. The first and last ends of the two circuit boards 41 / 42 are spliced and conducted through a conductor such as solder paste or lead wire.

[0015] The utility model transmits 220V high-voltage AC through wires in the LED lamp area, with small circuit voltage loss. The high-voltage AC is converted into low-voltage DC through the rectifier module DB and the power module S on the circuit board 4 for the work of each parallel light emitting module 50. The power modules S on every two circuit boards are connected in parallel to supply power to all the light emitting modules 50 on the two circuit boards 4. The LED lamp area can take one light emitting module 50 in the circuit board 4 as the smallest shear unit, without taking the whole circuit board 4 as a smallest shear unit. The light emitting module 50 contains a small number of LED lamp pearls, the shear unit is short, and the shear size is more flexible.

[0016] ReferenceFigure 2 If the rectifier module DB and the power module S are arranged at the left end of the circuit board, when the cutting position falls in the odd circuit board 41, all the light emitting modules 50 at both ends of the cutting have circuit conduction and can be normally used; when the cutting position falls in the even circuit board 42, the light emitting modules S on the right of the even circuit board 42 cannot be lighted due to no circuit conduction, therefore, the embodiment can only achieve conditional flexible cutting of the LED lamp strip. Figure 3 , the rectifier module DB and the power module S are arranged at the non-splicing end of the circuit board 4. That is, on the odd circuit board 41, the rectifier module DB and the power module S are arranged at the head end of the circuit board, and on the even circuit board 42, the rectifier module DB and the power module S are arranged at the tail end of the circuit board. In this way, whether the cutting position falls on the odd circuit board 41 or the even circuit board 42, all the light emitting modules S at both ends of the cutting have circuit conduction and can be arbitrarily cut without condition, and the cutting position is more flexible.

[0017] Reference Figure 5The rectifier module DB is a patch bridge stack, the patch bridge stack has two AC input ends connected to the two wires 3 through the lead wire 6 and two DC output ends including a power supply positive pole V+ and a power supply negative pole V-, and the power supply positive pole V+ and the power supply negative pole V- are connected with a first capacitor C1. The power supply module S includes a power supply chip IC, the power supply chip IC 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 V+. The drain foot DIN is a source contact point of a built-in power MOS tube of the chip, and is used for starting the power supply chip and providing internal operating current. The source foot S is connected to the negative pole of a chopper inductor L, the negative pole of the chopper inductor L is connected to the power supply negative pole V- through a continuous conduction diode D1. The source foot S is a source connection point of a built-in MOS tube of the chip, and is also a grounding reference of the bypass and feedback foot FB. The chopper inductor L is used for outputting 18V low-voltage DC power for the light emitting module 50 to work. The power supply foot VCC is connected to the source foot S through a second capacitor C2, and the second capacitor C2 is used for supplying power 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 R2 and a second diode D2 connected in series, and the second resistor R2 is further connected to the source foot S through a third capacitor C3. The first resistor R1 and the second resistor R2 are comparison sampling resistors of the feedback foot FB, and the output voltage of the power supply module S can be adjusted by adjusting the voltage division ratio of the first resistor and the second resistor and the inductance of the chopper inductor L. The third capacitor C3 prevents the sampling signal from being disturbed by a spike voltage and a ripple voltage, and the second diode D2 prevents the sampling signal and the subsequent circuit from interfering with each other. The positive pole of the chopper inductor is connected with the power supply negative pole V- through a parallelly connected electrolytic capacitor EC1 and a third resistor R3. The positive pole of the light emitting module 50 is connected to the positive pole of the chopper inductor L, and the negative pole of the light emitting module 50 is connected to the power supply negative pole V-. The positive pole of the chopper inductor L on the single circuit board 41 is connected to the positive pole of the chopper inductor L on the double circuit board 42, and the power supply negative pole V- on the single circuit board 41 is connected to the power supply negative pole V- on the double circuit board 42.

[0018] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the patent scope of the present application. It is pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A circuit structure of a high-voltage, driverless, and stroboscopic-free monochromatic LED light strip, comprising a plurality of circuit boards, wherein a rectifier module, a power supply module, and a plurality of light-emitting modules are arranged on the circuit boards, and characterized in that: The input end of the rectifier module is connected to the live circuit and the zero circuit, the rectifier module converts 220V AC power supply into 220V DC output to the power module, the power module converts 220V DC into low-voltage DC output to the plurality of light emitting modules, the light emitting module includes a plurality of series-connected LED lamp beads, a plurality of light emitting modules are connected in parallel to the output end of the power module, the power modules on the two circuit boards are connected in parallel to supply power to all light emitting modules on the two circuit boards, and the two ends of the two circuit boards are connected through the conductor splicing.

2. The circuit structure of the high-voltage drive-free single-color LED lamp strip without stroboscopic effect according to claim 1, characterized in that: The rectifier module is a patch bridge stack, the patch bridge stack has two AC input ends and two DC output ends, the two AC input ends are connected to the live circuit and the zero circuit, the two DC output ends include a power positive electrode and a power negative electrode, and the power positive electrode and the power negative electrode are connected with a first capacitor; the power module includes a power chip, the power chip includes a drain foot, a feedback foot, a power foot, and a source foot, the drain foot is connected to the power positive electrode, the source foot is connected to the negative electrode of the chopping inductor, the negative electrode of the chopping inductor is connected to the power negative electrode through a freewheeling diode, the power foot is connected to the source foot through a second capacitor, the feedback foot is connected to the source foot through a first resistor, and is connected to the positive electrode of the chopping inductor through a series connection of a second resistor and a second diode, the second resistor is connected to the source foot through a third capacitor, the positive electrode of the chopping inductor and the power negative electrode are connected with a parallel connection of an electrolytic capacitor and a third resistor, the positive electrode of the light emitting module is connected to the positive electrode of the chopping inductor, and the negative electrode of the light emitting module is connected to the power negative electrode, the positive electrode of the chopping inductor and the power negative electrode on the two circuit boards are respectively connected.

3. The circuit structure of the high-voltage drive-free single-color LED lamp strip without stroboscopic effect according to claim 1, characterized in that: The rectifier module and the power module on the two circuit boards are arranged at the non-splicing end of the circuit board.

4. The circuit structure of the high-voltage drive-free single-color LED lamp strip without stroboscopic effect according to claim 1, characterized in that: The live circuit and the zero circuit are wires.

5. The circuit structure of the high-voltage drive-free single-color LED lamp strip without stroboscopic effect according to claim 1, characterized in that: The working voltage of the light emitting module is 18V, which is composed of six LED lamp beads with a working voltage of 3V and a resistor connected in series. The working voltage of the light emitting module is 18V, which is composed of six LED lamp beads with a working voltage of 3V and a resistor connected in series.

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