CN220023130U

CN220023130U - Alternating current direct-drive LED lamp string

Info

Publication number: CN220023130U
Application number: CN202321134349.5U
Authority: CN
Inventors: 梁佩俊; 孙占龙
Original assignee: Shenzhen Meisi Micro Semiconductor Co ltd
Current assignee: Shenzhen Meisi Micro Semiconductor Co ltd
Priority date: 2023-05-12
Filing date: 2023-05-12
Publication date: 2023-11-14
Anticipated expiration: 2033-05-12

Abstract

The utility model discloses an alternating current direct-drive LED lamp string, which comprises a plurality of rectifying units and a plurality of LED luminous components, wherein the head end and the tail end of the LED lamp string are respectively provided with one rectifying unit, a plurality of LED luminous components which are connected in series are arranged between the head end rectifying unit and the tail end rectifying unit, the input end of the head end rectifying unit is connected with alternating current of a commercial power network, and the output end of the head end rectifying unit is connected with the VDD end of the adjacent LED luminous component; the LED light-emitting assembly comprises an LED driving chip and an LED light-emitting sheet, wherein the positive end of the LED light-emitting sheet is connected with the VDD end of the LED driving chip, the negative positive end is connected with the OUT end of the LED driving chip.

Description

Alternating current direct-drive LED lamp string

Technical Field

The utility model relates to the technical field of LED lamp string decoration, in particular to an alternating current direct-drive LED lamp string.

Background

Holidays or other places needing to be baked to the atmosphere often lack decorative lamps, and the decorative lamps are integrated into aspects of daily life.

Since Light Emitting Diodes (LEDs) have the properties of reliability, low power consumption, long service life, low operating temperature, etc., the decorative lamps (or decorative strings) in the prior art use light emitting diodes as light sources. However, it is known that LED lamps operate on a dc power supply to provide the advantages of high brightness and long life of LEDs.

However, the commercial power in life is alternating current, and the use of a full-bridge rectifying circuit is disclosed in the prior art, so that extra devices and circuits are needed, the appearance of the light string is greatly affected, and the potential safety hazard is also large.

Disclosure of Invention

Based on the defects of the prior art, the utility model discloses an alternating current direct-drive LED lamp string.

The rectification unit in the technical scheme is formed by connecting a plurality of light emitting diodes in series, so that the rectification unit has the rectification function and also has the luminous decoration; the LED light-emitting component in the technical scheme comprises an LED driving chip, a voltage stabilizing unit matched with a rectifying unit is arranged inside the LED driving chip, and under the operation of the voltage stabilizing unit, a digital unit inside the LED driving chip can stably drive the LED light-emitting sheet to generate ordered flash lamp pattern change.

The technical scheme of the utility model is as follows:

an alternating current direct-drive LED lamp string comprises a plurality of rectifying units and a plurality of LED luminous components.

In the technical scheme, the head end and the tail end of the LED lamp string are respectively provided with one rectifying unit, and a plurality of LED luminous assemblies which are connected in series are arranged between the head end rectifying unit and the tail end rectifying unit.

The input end of the head end rectifying unit is connected with alternating current of a commercial power network, and the output end of the head end rectifying unit is connected with the VDD end of the adjacent LED luminous assembly; the input end of the tail end rectifying unit is connected with the GND end of the adjacent LED luminous component, and the output end of the tail end rectifying unit is connected with an alternating current loop of a commercial power network.

In a further technical scheme, the LED light-emitting component comprises an LED driving chip and an LED light-emitting sheet, wherein the positive end of the LED light-emitting sheet is connected with the VDD end of the LED driving chip, and the negative end of the LED light-emitting sheet is connected with the OUT end of the LED driving chip.

The number of the LED luminous sheets is one or more.

Further, one rectifying unit is further arranged in series between two adjacent LED luminous assemblies.

In the technical scheme, the rectification unit is formed by connecting a plurality of light emitting diodes in series, and the rectification unit is used for half-wave rectification and luminous decoration.

In a more preferable technical scheme, the rectifying unit is formed by connecting 4 light emitting diodes in series.

In this technical scheme, the OUT terminal of the LED driving chip includes one or more of an output terminal, an OUTG terminal and an OUTB terminal.

Further, the LED luminous sheet is one of an R-color LED luminous sheet, a G-color LED luminous sheet and a B-color LED luminous sheet.

The R-color LED luminous sheet is connected with the OUTR end of the LED driving chip; the G-color LED luminous sheet is connected with the OUTG end of the LED driving chip; and the B-color LED luminous sheet is correspondingly connected with the OUTB end of the LED driving chip.

In the technical scheme, the LED driving chip comprises a voltage stabilizing unit and a digital unit connected with the voltage stabilizing unit.

The voltage stabilizing unit is used for providing stable input voltage for the digital unit.

The digital unit is connected with the OUT end of the LED driving chip and is used for adjusting the pattern flashing effect of the LED luminous sheet.

Further, the voltage stabilizing unit comprises a resistor R, PMOS pipe MP and a capacitor C.

One end of the resistor R is connected with the VDD end, the other end of the resistor R is connected with the source electrode of the PMOS tube MP, the drain electrode of the PMOS tube MP is connected with the digital unit and one end of the capacitor C, the other end of the capacitor C is grounded, and the grid electrode of the PMOS tube MP is connected with the drain electrode.

Further, the voltage stabilizing unit comprises a resistor R, a diode D1 and a capacitor C.

One end of the resistor R is connected with the VDD end, the other end of the resistor R is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the digital unit and one end of the capacitor C, and the other end of the capacitor C is grounded.

The utility model relates to an alternating current direct-drive LED lamp string. The technical effect of half-wave rectification can be achieved by the combined work of the rectification units in the technical scheme, and the rectification units are formed by connecting the light emitting diodes in series, so that the rectification units also have luminous decoration besides the rectification function, and devices of the light string are simplified.

In addition, the LED light-emitting component in the technical scheme comprises an LED driving chip, a voltage stabilizing unit matched with the rectifying unit is arranged inside the LED driving chip, and under the operation of the voltage stabilizing unit, a digital unit inside the LED driving chip can stably drive the LED light-emitting sheet to generate ordered flash lamp pattern change.

The technical scheme has simple structure, only one plug for plugging alternating current is needed at the head end of the whole light string, no extra devices and circuits are needed, and other parts can be used as decorative flashing lights (circuits are eliminated), so that the light string is simple and attractive.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of an ac direct-drive LED light string according to the present utility model.

Fig. 2 is a schematic structural diagram of another embodiment of an ac direct-driving LED light string according to the present utility model.

FIG. 3 is a block diagram of an LED driver chip in an AC direct drive LED string.

Fig. 4 is a schematic circuit diagram of an embodiment of a voltage stabilizing unit in an ac direct-drive LED string according to the present utility model.

Fig. 5 is a schematic circuit diagram of another embodiment of a voltage stabilizing unit in an ac direct-drive LED string according to the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the accompanying drawings.

For the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; some well known structures in the drawings and omission of the description thereof will be understood by those skilled in the art. The same or similar reference numerals correspond to the same or similar components.

Holidays or other places needing to be baked to the atmosphere often lack the decorative lamp, the decorative lamp has been integrated into the aspect of daily life, however, the commercial power in life is alternating current, has disclosed in the prior art and has used full bridge rectifier circuit, not only needs extra device and circuit, still very influences the outward appearance of lamp cluster.

In view of the defects of the prior art, the utility model discloses an alternating current direct-drive LED lamp string. The rectification unit in the technical scheme is formed by connecting a plurality of light emitting diodes in series, so the rectification unit has the rectification function and also has the luminous decoration. In addition, in order to adapt the rectifying unit, a voltage stabilizing unit which is matched with the rectifying unit is arranged inside the LED driving chip in the LED light-emitting assembly, the voltage stabilizing unit can stably output set voltage, and a digital unit inside the LED driving chip can drive the LED light-emitting sheet to generate ordered flash lamp pattern change under the stable voltage.

It should be noted that the LED driving chip and the LED light emitting sheet are integrated together to form a flash lamp bead with LED driving, and the light emitting diode forming the rectifying unit is also an LED lamp bead. The LED light-emitting component is almost the same as an independent LED in appearance, so that the head end of the whole light string is provided with a plug for plugging alternating current, and the other parts have consistency in appearance and can be used as decorative flashing lights (excluding lines). Therefore, the utility model has beautiful and safe appearance on the basis of realizing the flashing LED lamp string.

Of course, in the technical scheme, the light emitting diode forming the rectifying unit is different from the light emitting mode of the LED light emitting component, the light emitting diode forming the rectifying unit only emits light by simple flashing, and the LED light emitting component is provided with a pattern flashing lamp controlled by a program.

Specific embodiments of the utility model are as follows:

the embodiment relates to an alternating current direct-drive LED lamp string, which comprises a plurality of rectifying units and a plurality of LED luminous components.

In this embodiment, as shown in fig. 1, the front end and the tail end of the LED light string are respectively provided with one rectifying unit, and a plurality of LED light emitting components connected in series are arranged between the front end rectifying unit and the tail end rectifying unit.

The input end of the head end rectifying unit is connected with alternating current of a commercial power network, the output end of the head end rectifying unit is connected with the VDD end of the adjacent LED luminous assembly, the GND end of the LED luminous assembly is connected with the VDD end of the next-stage LED luminous assembly, and the like. The input end of the tail end rectifying unit is connected with the GND end of the adjacent LED luminous component (namely the GND end of the last-stage LED luminous component), and the output end of the tail end rectifying unit is connected with an alternating current loop of a commercial power network.

In a further technical scheme of the embodiment, the LED light emitting assembly comprises an LED driving chip U1 and an LED light emitting sheet, wherein the positive end of the LED light emitting sheet is connected with the VDD end of the LED driving chip U1, and the negative end of the LED light emitting sheet is connected with the OUT end of the LED driving chip U1. It should be noted that, the positive terminal of the LED light emitting sheet is connected to the VDD terminal of the current LED driving chip U1, and the VDD terminal of the current LED driving chip U1 is connected to the output terminal of the rectifying unit or the GND terminal of the upper LED driving chip U1 (because of the serial connection, the GND terminal of the upper LED driving chip U1 is equivalent to the output terminal of the rectifying unit).

In the technical scheme, the LED luminous sheets are monochromatic LED lamp beads, and the number of the LED luminous sheets is one or more. In this embodiment, the number of the LED light emitting sheets is 3, which are respectively an R-color LED light emitting sheet, a G-color LED light emitting sheet, and a B-color LED light emitting sheet (R-color LED light bead, G-color LED light bead, and B-color LED light bead), as shown in fig. 1.

In this embodiment, the OUT terminal of the LED driving chip U1 includes one or more of the output terminal, the OUTG terminal and the OUTB terminal, as shown in fig. 1 and 3.

The R-color LED luminous sheet is connected with the OUTR end of the LED driving chip U1; the G-color LED luminous sheet is connected with the OUTG end of the LED driving chip U1; and the B-color LED luminous sheet is correspondingly connected with the OUTB end of the LED driving chip.

Note that, when the OUT terminal of the LED driving chip U1 includes only one or two of the output terminal, the OUTG terminal, and the OUTB terminal, the LED light emitting sheet can be only a color LED light emitting sheet corresponding to the OUT terminal. For example, when the OUT terminal only includes the output terminal, the corresponding LED light emitting sheet is the R-color LED light emitting sheet; when the OUT terminal includes only the output terminal and the OUTB terminal, then the corresponding LED light-emitting sheets are the R-color LED light-emitting sheet and the B-color LED light-emitting sheet, and so on.

In an alternative technical solution, one rectifying unit is further disposed in series between two adjacent LED light emitting assemblies, as shown in fig. 2. That is, in the present embodiment, the rectifying units and the LED light emitting assemblies are alternately arranged, but the head end and the tail end of the LED light string are arranged as the rectifying units.

According to the technical scheme, the rectification unit is formed by connecting a plurality of light emitting diodes D2 in series, and the rectification unit is used for half-wave rectification and luminous decoration.

In this embodiment, as shown in fig. 1 and fig. 2, the rectifying unit is composed of 4 light emitting diodes D2 connected in series. That is, the cathode of the first light emitting diode D2 is connected to the anode of the second light emitting diode D2, the cathode of the second light emitting diode D2 is connected to the anode of the third light emitting diode D2, and the cathode of the third light emitting diode D2 is connected to the anode of the fourth light emitting diode D2.

The utility model relates to an alternating current direct-drive LED lamp string, which comprises a plurality of rectification units. It should be noted that, the plurality of rectifying units of the LED light string work together when the alternating current is turned on, so that the ideal rectifying effect can be achieved. Because the rectification unit is the light-emitting diode D2, the rectification unit has the decoration function of the light-emitting flash lamp while realizing half-wave rectification.

The rectification unit in the alternating current direct-driven LED lamp string in the prior art is a simple rectification device, and compared with the LED lamp string, the alternating current direct-driven LED lamp string is large in size, the attractive appearance of the LED lamp string is greatly affected, the decorative effect of the LED lamp string is seriously weakened, and hidden danger exists in safety.

The LED lamp string can be used for alternating current with various alternating voltages, such as 220V alternating voltage in China, 220V-240V alternating voltage in Europe, 120V alternating voltage in the United states, and the like. It should be noted that, in order to ensure that each LED light emitting unit (the LED light emitting unit refers to a light emitting diode and an LED light emitting sheet in the rectifying unit) in the LED light string, the upper limit of the number of LED light emitting units in the LED light string adapted under different ac voltages is different. The number of the LED light emitting units in the LED light string is 44-74 under 220V alternating current voltage in China, and the number of the LED light emitting units in the LED light string is 24-40 under 120V alternating current voltage in the United states. Therefore, the LED light string described in the present utility model can be used in ac with various ac voltages, and the number of LED light emitting units is determined according to the specific ac voltage, which is not described in detail in this embodiment.

In a more preferable solution of this embodiment, as shown in fig. 3, the LED driving chip U1 includes a voltage stabilizing unit 10 and a digital unit 20 connected to the voltage stabilizing unit 10.

The voltage stabilizing unit 10 is configured to adapt the rectifying unit so as to provide a stable input voltage to the digital unit 20. In this embodiment, the regulated voltage provided by the voltage regulator 10 is 0.7V, that is, the digital unit 20 can stably operate under the 0.7V power supply.

The digital unit 20 is connected with the OUT end of the LED driving chip U1, and is used for driving and adjusting the pattern flashing effect of the LED light emitting sheet connected with the OUT end of the LED driving chip U1.

In an alternative solution of this embodiment, the voltage stabilizing unit 10 includes a resistor R, PMOS tube MP and a capacitor C.

One end of the resistor R is connected with the VDD end, the other end of the resistor R is connected with the source electrode of the PMOS tube MP, the drain electrode of the PMOS tube MP is connected with the digital unit 20 and one end of the capacitor C, the other end of the capacitor C is grounded, and the grid electrode of the PMOS tube MP is connected with the drain electrode.

In this embodiment, the voltage stabilizing unit 10 includes a resistor R, a diode D1, and a capacitor C.

One end of the resistor R is connected with the VDD terminal, the other end of the resistor R is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the digital unit 20 and one end of the capacitor C, and the other end of the capacitor C is grounded.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The utility model provides an alternating current directly drives LED lamp cluster, contains a plurality of rectifier unit and a plurality of LED luminous element, its characterized in that:

the head end and the tail end of the LED lamp string are respectively provided with one rectifying unit, and a plurality of LED luminous assemblies which are connected in series are arranged between the head end rectifying unit and the tail end rectifying unit;

the input end of the head end rectifying unit is connected with alternating current of a commercial power network, and the output end of the head end rectifying unit is connected with the VDD end of the adjacent LED luminous assembly; the input end of the tail end rectifying unit is connected with the GND end of the adjacent LED luminous component, and the output end of the tail end rectifying unit is connected with an alternating current loop of a commercial power network;

the LED light-emitting component comprises an LED driving chip and an LED light-emitting sheet, wherein the positive end of the LED light-emitting sheet is connected with the VDD end of the LED driving chip, and the negative end of the LED light-emitting sheet is connected with the OUT end of the LED driving chip.

2. The ac direct-drive LED light string of claim 1, wherein one of said rectifying units is further provided in series between two adjacent LED light emitting modules.

3. The ac direct drive LED light string of claim 1, wherein the number of LED light emitting chips is one or more.

4. The ac direct-drive LED light string of claim 1, wherein the rectifying unit is composed of a plurality of light emitting diodes connected in series, and the rectifying unit is used for half-wave rectification and luminous decoration.

5. The ac direct-drive LED light string of claim 4, wherein the rectifying unit is composed of 4 LEDs connected in series.

6. The ac direct-drive LED light string of claim 1, wherein the OUT terminal of the LED driver chip comprises one or more of an output terminal, an OUTG terminal, and an OUTB terminal.

7. The ac direct-drive LED light string of claim 6, wherein the LED light-emitting sheet is one of an R-color LED light-emitting sheet, a G-color LED light-emitting sheet, and a B-color LED light-emitting sheet;

8. The ac direct-drive LED light string according to claim 1 or 6, wherein the LED driving chip comprises a voltage stabilizing unit and a digital unit connected with the voltage stabilizing unit;

the voltage stabilizing unit is used for providing stable input voltage for the digital unit;

9. The ac direct-drive LED lamp string according to claim 8, wherein the voltage stabilizing unit comprises a resistor R, PMOS tube MP and a capacitor C;

10. The ac direct-drive LED lamp string according to claim 8, wherein the voltage stabilizing unit comprises a resistor R, a diode D1 and a capacitor C;