LED lamp bead directly applicable to alternating current and LED lamp strip using same

Abstract

The utility model discloses an LED lamp bead directly applicable to alternating current and an LED lamp strip using the same, the LED lamp bead directly applicable to alternating current comprises an LED support, two pins extend out of two sides of the LED support, a cavity is arranged in the LED support, a first LED light-emitting wafer and a second LED light-emitting wafer are arranged in the cavity, and the first LED light-emitting wafer and the second LED light-emitting wafer are arranged in the cavity. The positive electrode of the first LED light-emitting wafer and the negative electrode of the second LED light-emitting wafer are electrically connected with one pin, the negative electrode of the first LED light-emitting wafer and the positive electrode of the second LED light-emitting wafer are electrically connected with the other pin, and the cavity is filled and sealed by packaging colloid. When the LED lamp beads are connected to a direct-current circuit, positive and negative electrodes do not need to be distinguished; when alternating current is connected between the two pins of the LED lamp bead, the first LED light-emitting wafer emits light when the alternating current is in a positive half cycle, and the second LED light-emitting wafer emits light when the alternating current is in a negative half cycle, so that the LED lamp bead can be directly suitable for alternating current power supply without a stroboflash phenomenon.

Description

Technical Field

[0001] This utility model relates to an LED lamp bead that is directly compatible with alternating current and an LED light strip using the lamp bead. Background Technology

[0002] Existing LED light strips consist of a strip body and an AC / DC converter. The AC / DC converter converts alternating current (AC) to direct current (DC) to power the strip body. The strip body includes a flexible circuit board with multiple resistors and LED chips soldered to its front side. This type of LED light strip has the following disadvantages: 1. The AC / DC converter is expensive and occupies a large space; 2. Due to the unidirectional conductivity of LED chips, careful attention must be paid to the polarity during LED chip soldering, and the electrodes of the strip body also need to be distinguished between positive and negative polarities, making operation cumbersome. If the AC / DC converter is not used and the LED chips on the strip are directly connected to AC power, both the chips and the strip will exhibit visual flickering. Utility Model Content

[0003] This utility model provides an LED lamp bead that is directly compatible with alternating current and an LED light strip using the lamp bead, in order to solve the problems in the prior art where LED light strips need to be equipped with AC / DC converters and the LED lamp beads in LED light strips need to be distinguished by positive and negative directions.

[0004] The technical solution of this utility model is implemented as follows:

[0005] The first objective of this invention is to provide an LED light bead that is directly compatible with alternating current, comprising an LED bracket with two pins extending from both sides of the bracket. The LED bracket has a cavity inside, in which a first LED light-emitting chip and a second LED light-emitting chip are disposed. The positive electrode of the first LED light-emitting chip and the negative electrode of the second LED light-emitting chip are electrically connected to one of the pins, and the negative electrode of the first LED light-emitting chip and the positive electrode of the second LED light-emitting chip are electrically connected to the other pin. The cavity is filled with encapsulating colloid to seal the first LED light-emitting chip and the second LED light-emitting chip.

[0006] The aforementioned pins are surface mount pins.

[0007] The second objective of this invention is to provide an LED light strip, comprising a flexible circuit board and a covering layer. The flexible circuit board has an LED circuit printed on it, the LED circuit including two electrodes for connecting to a power source. The flexible circuit board is soldered with LED units and resistor units, the LED units and resistor units being connected in series between the two electrodes. Each resistor unit includes several resistors connected in parallel, and each LED unit includes several LED beads connected in parallel. The LED beads directly compatible with AC power are those described above. The covering layer extends along the length of the flexible circuit board, covering the flexible circuit board, resistors, and the LED beads directly compatible with AC power.

[0008] The aforementioned resistors are arranged at intervals along the length of the flexible circuit board, and n LED beads that are directly applicable to AC power are arranged between two adjacent resistors, where n≥1.

[0009] The flexible circuit board described above has two electrode pins for LED circuits leading out from its end.

[0010] Alternatively, the above may also include an array of elongated conductors extending along the length of the flexible circuit board. The conductor array includes at least two spaced-apart conductors arranged side by side and an insulating layer. The two conductors are electrically connected to two electrodes respectively. The insulating layer covers the flexible circuit board and the two conductors, and the covering layer covers the flexible circuit board and the conductor array.

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] 1. The LED bead directly compatible with AC power includes an LED bracket with two leads extending from both sides. A cavity is provided inside the LED bracket, within which a first LED chip and a second LED chip are disposed. The positive terminal of the first LED chip and the negative terminal of the second LED chip are electrically connected to one of the leads, and the negative terminal of the first LED chip and the positive terminal of the second LED chip are electrically connected to the other lead. The cavity is filled with encapsulating colloid to seal the first and second LED chips. When the LED bead is connected to a DC circuit, there is no need to distinguish between positive and negative terminals. When AC power is connected between the two leads of the LED bead, the first LED chip emits light during the positive half-cycle of the AC power, and the second LED chip emits light during the negative half-cycle. Therefore, this LED bead can be directly powered by AC power. Furthermore, when powered by AC power, the LED bead of this invention emits light during both the positive and negative half-cycles of the AC power, visually eliminating the flickering phenomenon that occurs when directly powering an LED bead with AC power.

[0013] 2. The LED light strip includes a flexible circuit board and a covering layer. LED circuitry is printed on the flexible circuit board, and the LED circuitry includes two electrodes for connecting to a power source. LED units and resistor units are soldered onto the flexible circuit board, and the LED units and resistor units are connected in series between the two electrodes. Each resistor unit includes several resistors connected in parallel, and each LED unit includes several LED beads connected in parallel. The LED beads directly compatible with AC power are those described above. The covering layer extends along the length of the flexible circuit board, covering the flexible circuit board, the directly compatible AC power LED beads, and the resistors. By using directly compatible AC power LED beads, the LED light strip can be directly connected to AC power without the need for an AC / DC converter, reducing production costs and installation difficulty. When powered by AC power, the LED beads of this invention emit light during both the positive and negative half-cycles of the AC power, visually eliminating the flickering phenomenon that occurs when the light strip directly uses AC power to power the LED beads.

[0014] 3. Other advantages of this utility model are described in detail in the embodiments section. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an LED bead that is directly applicable to alternating current, provided in Embodiment 1 of this utility model;

[0016] Figure 2 A top view of an LED bead directly applicable to alternating current as provided in Embodiment 1 of this utility model;

[0017] Figure 3 for Figure 2 AA cross-sectional view;

[0018] Figure 4 This is a schematic diagram of the internal circuit of an LED bead that is directly compatible with AC power, provided in Embodiment 1 of this utility model.

[0019] Figure 5 The circuit diagram of the LED circuit in the LED light strip provided in Embodiment 2 of this utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the LED light strip provided in Embodiment 2 of this utility model;

[0021] Figure 7 This is a side view of the LED light strip provided in Embodiment 2 of the present utility model;

[0022] Figure 8 This is a side view of the LED light strip provided in Embodiment 3 of this utility model;

[0023] Figure 9This is a structural schematic diagram of the LED light strip provided in Embodiment 3 of this utility model. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Example 1:

[0026] like Figures 1 to 4 As shown, this embodiment provides an LED lamp bead that is directly compatible with alternating current, including an LED bracket 11, with two pins 12 extending from both sides of the LED bracket 11. The LED bracket 11 has a cavity 13, in which a first LED light-emitting chip LED1 and a second LED light-emitting chip LED2 are disposed. The positive electrode of the first LED light-emitting chip LED1 and the negative electrode of the second LED light-emitting chip LED2 are electrically connected to one of the pins 12, and the negative electrode of the first LED light-emitting chip LED1 and the positive electrode of the second LED light-emitting chip LED2 are electrically connected to the other pin 12. The cavity 13 is filled with encapsulating colloid 14 to seal the first LED light-emitting chip LED1 and the second LED light-emitting chip LED2.

[0027] In this embodiment, when DC power is connected between the two pins 12 of the LED lamp bead, one of the first LED (LED1) and the second LED (LED2) will emit light regardless of the direction of the DC current, eliminating the need to distinguish between positive and negative terminals when the LED lamp bead is connected to a DC circuit. When AC power is connected between the two pins of the LED lamp bead, the first LED (LED1) emits light during the positive half-cycle of the AC power, and the second LED (LED2) emits light during the negative half-cycle. Therefore, this LED lamp bead can be directly powered by AC power. Furthermore, when powered by AC power, the LED lamp bead of this invention emits light during both the positive and negative half-cycles of the AC power, visually eliminating the flickering phenomenon that occurs when directly powering the LED lamp bead with AC power.

[0028] Pin 12 mentioned above is a surface mount pin.

[0029] Example 2:

[0030] like Figures 5 to 7As shown, this embodiment provides an LED light strip, including a flexible circuit board 2 and a covering layer 4. The flexible circuit board 2 is printed with an LED circuit, wherein the LED circuit includes two electrodes for connecting to a power source. The flexible circuit board 2 is soldered with an LED unit 22 and a resistor unit 23. The LED unit 22 and the resistor unit 23 are connected in series between the two electrodes. The resistor unit 23 includes a plurality of resistors 3 connected in parallel. The LED unit 22 includes a plurality of LED beads 1 directly applicable to AC power connected in parallel. The LED beads 1 directly applicable to AC power are the LED beads directly applicable to AC power described in Embodiment 1. The covering layer 4 extends along the length direction of the flexible circuit board 2 and covers the flexible circuit board 2, the resistors 3 and the LED beads 1 directly applicable to AC power.

[0031] The LED light strip described in this embodiment uses LED beads 1 that are directly compatible with AC power, allowing the LED light strip to be connected to either DC or AC power. When connected to DC power, there is no need to distinguish between positive and negative terminals, reducing installation difficulty. When connected to AC power, the first LED light-emitting chip LED1 illuminates during the positive half-cycle of the AC power, and the second LED light-emitting chip LED2 illuminates during the negative half-cycle, eliminating the need for an AC / DC converter and reducing production costs. Furthermore, when using AC power, the LED beads of this invention illuminate during both the positive and negative half-cycles of the AC power, visually eliminating the flickering phenomenon that occurs when the light strip directly uses AC power to power the LED beads.

[0032] The aforementioned resistors 3 are arranged at intervals along the length of the flexible circuit board 2. Between two adjacent resistors 3, n directly AC-compatible LED beads 1 are arranged, where n ≥ 1. Preferably, 1 to 3 directly AC-compatible LED beads 1 are arranged between two adjacent resistors 3. In this embodiment, 2 directly AC-compatible LED beads 1 are arranged between two adjacent resistors 3.

[0033] The LED light strip can be cut randomly without causing a sudden increase in the current flowing through the directly AC-compatible LED beads 1, and it will not cause some of the directly AC-compatible LED beads 1 to be open-circuited. The cut LED light strip can still work normally. Users can cut the LED light strip according to the required length, thus making the use of LED light strips more user-friendly.

[0034] The flexible circuit board 2 described above has two electrode pins 21 extending from its end, which are part of the LED circuit. A metal reinforcing layer is provided on the surface of the pins 21. The metal reinforcing layer is used to strengthen the pins 21 to prevent them from being easily pulled off during connection.

[0035] Example 3:

[0036] like Figure 8 , Figure 9 As shown, the LED light strip provided in this embodiment is similar to the LED light strip described in Embodiment 2, except that:

[0037] The LED light strip also includes a long strip-shaped conductor array 5, which extends along the length of the flexible circuit board 2. The conductor array 5 includes at least two spaced and side-by-side conductors 51 and an insulating layer 52. The two conductors 51 are electrically connected to two electrodes respectively. The insulating layer 52 covers the flexible circuit board 2 and the two conductors 51. The covering layer 4 covers the flexible circuit board 2 and the conductor array 5.

[0038] The LED light strip described in this embodiment uses multi-strand wires for current transmission, which avoids the burnout of wire 51 due to excessive current, making the LED light strip suitable for high-voltage circuits.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A direct AC LED lamp bead, comprising an LED holder (11), two pins (12) extending from both sides of the LED holder (11), and a cavity (13) provided in the LED holder (11), characterized in that: The cavity (13) is provided with a first LED light emitting wafer (LED1) and a second LED light emitting wafer (LED2), the positive electrode of the first LED light emitting wafer (LED1) and the negative electrode of the second LED light emitting wafer (LED2) are electrically connected with one of the pins (12), the negative electrode of the first LED light emitting wafer (LED1) and the positive electrode of the second LED light emitting wafer (LED2) are electrically connected with the other pin (12), and the cavity (13) is filled with a packaging glue (14) to seal the first LED light emitting wafer (LED1) and the second LED light emitting wafer (LED2).

2. The LED lamp bead directly applicable to AC power according to claim 1, characterized in that: The pin (12) is a patch type pin.

3. An LED light strip comprising a flexible circuit board (2) and a cover layer (4), the flexible circuit board (2) having printed thereon an LED circuit, characterized in that: The LED circuit includes two electrodes for connecting a power supply, the flexible circuit board (2) is welded with an LED unit (22) and a resistance unit (23), the LED unit (22) and the resistance unit (23) are connected in series between the two electrodes, the resistance unit (23) includes a plurality of resistors (3) connected in parallel, the LED unit (22) includes a plurality of LED lamp beads (1) connected in parallel, the LED lamp bead (1) directly applicable to alternating current is the LED lamp bead directly applicable to alternating current as claimed in any one of claims 1 to 2, and the cladding layer (4) extends along the length direction of the flexible circuit board (2) to clad the flexible circuit board (2), the resistor (3) and the LED lamp bead (1) directly applicable to alternating current.

4. The LED light strip of claim 3, wherein: A plurality of the resistors (3) are arranged at intervals along the length direction of the flexible circuit board (2), and n LED lamp beads (1) directly applicable to alternating current are arranged between two adjacent resistors (3), and n is greater than or equal to 1.

5. The LED light strip of claim 4, wherein: The flexible circuit board (2) has a pin (21) leading out the two electrodes of the LED circuit at the end thereof.

6. The LED light strip of claim 4, wherein: Further comprising a long strip-shaped wire array (5) extending along the length direction of the flexible circuit board (2), the wire array (5) includes at least two spaced parallel arranged wires (51) and an insulation layer (52), the two wires (51) are respectively electrically connected with the two electrodes, the insulation layer (52) clads the flexible circuit board (2) and the two wires (51), and the cladding layer (4) clads the flexible circuit board (2) and the wire array (5).

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