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

Abstract

The invention discloses an LED lamp bead directly suitable for alternating current and an LED lamp strip using the LED lamp bead, the LED lamp bead directly suitable for alternating current comprises an LED support, two pins extend out of the two sides of the LED support, a cavity is formed 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 connected with the first LED light-emitting wafer and the second LED light-emitting wafer. 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] The invention relates to an LED lamp bead directly applicable to alternating current and an LED lamp belt using the lamp bead. Background Art

[0002] The existing LED light strip includes a light strip body and an AC / DC converter. The AC / DC converter converts AC power into DC power and then supplies power to the light strip body. The light strip body includes a flexible circuit board, and multiple resistors and LED lamp beads are welded on the front of the flexible circuit board. The LED light strip with this structure has the following disadvantages: 1. The AC / DC converter is expensive and occupies a large space; 2. Due to the unidirectional conductivity of LED lamp beads, attention needs to be paid to the positive and negative polarities when welding the LED lamp beads, and the electrodes of the light strip body also need to distinguish the positive and negative polarities, which is troublesome to operate. If the AC / DC converter is not used, the LED lamp beads on the light strip are directly connected to AC power, and the lamp beads and the light strip will visually flicker. Summary of the invention

[0003] The present invention provides an LED lamp bead directly applicable to alternating current and an LED light strip using the same, so as to solve the problem in the prior art that the LED light strip needs to be equipped with an AC / DC converter and the LED lamp beads in the LED light strip need to be divided into forward and reverse directions.

[0004] The technical solution of the present invention is achieved in this way:

[0005] The first object of the present invention is to provide an LED lamp bead that is directly applicable to alternating current, including an LED bracket, two pins extending from both sides of the LED bracket, a cavity provided in the LED bracket, a first LED light-emitting chip and a second LED light-emitting chip provided in the cavity, the positive pole of the first LED light-emitting chip and the negative pole of the second LED light-emitting chip being electrically connected to one of the pins, the negative pole of the first LED light-emitting chip and the positive pole of the second LED light-emitting chip being electrically connected to the other pin, and the cavity being filled with packaging colloid to seal the first LED light-emitting chip and the second LED light-emitting chip.

[0006] The pins mentioned above are surface mount pins.

[0007] The second object of the present invention is to provide an LED light strip, comprising a flexible circuit board and a covering layer, wherein an LED circuit is printed on the flexible circuit board, wherein the LED circuit comprises two electrodes for connecting a power supply, an LED unit and a resistance unit are welded to the flexible circuit board, the LED unit and the resistance unit are connected in series between the two electrodes, the resistance unit comprises a plurality of resistors connected in parallel, the LED unit comprises a plurality of LED lamp beads connected in parallel, the LED lamp beads directly applicable to alternating current are the LED lamp beads directly applicable to alternating current as described above, and the covering layer extends along the length direction of the flexible circuit board to cover the flexible circuit board, the resistor and the LED lamp beads directly applicable to alternating current.

[0008] The plurality of resistors are arranged at intervals along the length direction of the flexible circuit board, and n LED lamp beads directly applicable to alternating current are arranged between two adjacent resistors, where n≥1.

[0009] The ends of the flexible circuit board are provided with pins for two electrodes of the LED circuit.

[0010] Or the above also includes a long strip-shaped conductor array, which extends along the length direction of the flexible circuit board. The conductor array includes at least two conductors arranged side by side and an insulating layer. The two conductors are electrically connected to the 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, the present invention has the following advantages:

[0012] 1. The LED lamp bead directly applicable to alternating current includes an LED bracket, two pins extending from both sides of the LED bracket, a cavity is provided in the LED bracket, a first LED light-emitting chip and a second LED light-emitting chip are provided in the cavity, the positive pole of the first LED light-emitting chip and the negative pole of the second LED light-emitting chip are electrically connected to one of the pins, the negative pole of the first LED light-emitting chip and the positive pole of the second LED light-emitting chip are electrically connected to the other pin, and the cavity is filled with a packaging colloid to seal the first LED light-emitting chip and the second LED light-emitting chip. The LED lamp bead does not need to distinguish between positive and negative poles when connected to a direct current circuit; when alternating current is connected between the two pins of the LED lamp bead, the first LED light-emitting chip emits light when the alternating current is in the positive half cycle, and the second LED light-emitting chip emits light when the alternating current is in the negative half cycle, so the LED lamp bead can be directly applicable to alternating current power supply, and when applicable to alternating current power supply, the LED lamp bead of the present invention emits light in both the positive half cycle and the negative half cycle of the alternating current, visually eliminating the stroboscopic phenomenon of directly using alternating current to power the LED lamp bead.

[0013] 2. The LED light strip includes a flexible circuit board and a covering layer. The flexible circuit board is printed with an LED circuit, wherein the LED circuit includes two electrodes for connecting to a power source, an LED unit and a resistor unit are welded to the flexible circuit board, the LED unit and the resistor unit are connected in series between the two electrodes, the resistor unit includes a plurality of resistors connected in parallel, the LED unit includes a plurality of LED lamp beads connected in parallel, the LED lamp beads directly applicable to alternating current are the LED lamp beads directly applicable to alternating current described above, the covering layer extends along the length direction of the flexible circuit board, and covers the flexible circuit board, the LED lamp beads directly applicable to alternating current, and the resistors. By using LED lamp beads directly applicable to alternating current, the LED light strip can be directly connected to alternating current without the need for an AC / DC converter, thereby reducing production costs and installation difficulty. When powered by alternating current, the LED lamp beads of the present invention emit light in both the positive and negative half cycles of the alternating current, visually eliminating the stroboscopic phenomenon of the light strip directly using alternating current to power the LED lamp beads.

[0014] 3. Other advantages of the present invention are described in detail in the embodiment section. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of an LED lamp bead directly applicable to alternating current provided in the first embodiment of the present invention;

[0016] Figure 2 A top view of an LED lamp bead directly applicable to alternating current provided in the first embodiment of the present invention;

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

[0018] Figure 4 The internal circuit schematic diagram of an LED lamp bead directly applicable to alternating current provided in the first embodiment of the present invention;

[0019] Figure 5 A circuit schematic diagram of an LED circuit in an LED light strip provided in Embodiment 2 of the present invention;

[0020] Figure 6 A schematic diagram of the structure of an LED light strip provided in Embodiment 2 of the present invention;

[0021] Figure 7 A side view of the LED light strip provided in the second embodiment of the present invention;

[0022] Figure 8 A side view of the LED light strip provided in the third embodiment of the present invention;

[0023] Fig. 9 This is a schematic diagram of the structure of an LED light strip provided in Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Embodiment 1:

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

[0027] The LED lamp bead described in this embodiment, when direct current is connected between the two pins 12 of the LED lamp bead, no matter what the current direction of the direct current is, one of the first LED light-emitting chip LED1 and the second LED light-emitting chip LED2 will emit light and work, so that the LED lamp bead does not need to distinguish between positive and negative poles when connected to the direct current circuit; when alternating current is connected between the two pins of the LED lamp bead, the first LED light-emitting chip LED1 emits light when the alternating current is in the positive half cycle, and the second LED light-emitting chip LED2 emits light when the alternating current is in the negative half cycle, so the LED lamp bead can be directly powered by alternating current. And when powered by alternating current, the LED lamp bead of the present invention emits light in both the positive and negative half cycles of the alternating current, visually eliminating the stroboscopic phenomenon of directly using alternating current to power the LED lamp bead.

[0028] The pins 12 mentioned above are surface mount pins.

[0029] Embodiment 2:

[0030] like Figures 5 to 7As shown, the present embodiment provides an LED light strip, comprising a flexible circuit board 2 and a covering layer 4, wherein an LED circuit is printed on the flexible circuit board 2, wherein the LED circuit comprises two electrodes for connecting a power source, an LED unit 22 and a resistor unit 23 are welded to the flexible circuit board 2, the LED unit 22 and the resistor unit 23 are connected in series between the two electrodes, the resistor unit 23 comprises a plurality of resistors 3 connected in parallel, the LED unit 22 comprises a plurality of LED lamp beads 1 directly applicable to alternating current connected in parallel, the LED lamp beads 1 directly applicable to alternating current are the LED lamp beads directly applicable to alternating current described in Example 1, the covering layer 4 extends along the length direction of the flexible circuit board 2, and covers the flexible circuit board 2, the resistor 3 and the LED lamp beads 1 directly applicable to alternating current.

[0031] The LED light strip described in this embodiment uses LED lamp beads 1 that are directly applicable to AC power, so that the LED light strip can be connected to DC power or directly to AC power. When connected to DC power, there is no need to distinguish between positive and negative poles, which reduces the difficulty of installation. When connected to AC power, the first LED light-emitting chip LED1 emits light in the positive half cycle of the AC power, and the second LED light-emitting chip LED2 emits light in the negative half cycle of the AC power. There is no need to equip an AC / DC converter, which reduces the production cost. When AC power is applied, the LED lamp beads of the present invention will emit light in both the positive and negative half cycles of the AC power, visually eliminating the stroboscopic phenomenon of the light strip directly using AC power to power the LED lamp beads.

[0032] The plurality of 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, where n≥1. Preferably, 1 to 3 LED lamp beads 1 directly applicable to alternating current are arranged between two adjacent resistors 3. In this embodiment, 2 LED lamp beads 1 directly applicable to alternating current are arranged between two adjacent resistors 3.

[0033] The LED light strip can be cut randomly without causing the current of the LED lamp beads 1 directly applicable to AC power to suddenly increase, and without causing a short circuit in some of the LED lamp beads 1 directly applicable to AC power. The cut LED light strip can still work normally, and the user can cut the LED light strip according to the required length, thereby making the use of the LED light strip more user-friendly.

[0034] The ends of the flexible circuit board 2 are provided with pins 21 of two electrodes of the LED circuit, and a metal reinforcement layer is provided on the surface of the pins 21. The metal reinforcement layer is used to strengthen the strength of the pins 21 to prevent the pins 21 from being easily broken during connection.

[0035] Embodiment three:

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

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

[0038] The LED light strip described in this embodiment uses multiple strands of wire to transmit current, thereby preventing the wire 51 from being burned 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 the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An LED lamp bead directly applicable to alternating current, comprising an LED bracket (11), two pins (12) extending from both sides of the LED bracket (11), and a cavity (13) provided inside the LED bracket (11), characterized in that: A first LED light-emitting chip (LED1) and a second LED light-emitting chip (LED2) are arranged in the cavity (13); 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); 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); and the cavity (13) is filled with a packaging colloid (14) to seal the first LED light-emitting chip (LED1) and the second LED light-emitting chip (LED2).

2. The LED lamp bead directly applicable to alternating current according to claim 1, characterized in that: The pin (12) is a surface mount pin.

3. An LED light strip, comprising a flexible circuit board (2) and a covering layer (4), wherein an LED circuit is printed on the flexible circuit board (2), characterized in that: The LED circuit comprises two electrodes for connecting to a power source, the flexible circuit board (2) is welded 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) comprises a plurality of resistors (3) connected in parallel, the LED unit (22) comprises a plurality of LED lamp beads (1) connected in parallel, the LED lamp beads (1) directly applicable to alternating current are the LED lamp beads directly applicable to alternating current as claimed in any one of claims 1 to 2, and the covering layer (4) extends along the length direction of the flexible circuit board (2) to cover the flexible circuit board (2), the resistor (3) and the LED lamp beads (1) directly applicable to alternating current.

4. The LED light strip according to claim 3, characterized in that: A plurality of 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), where n≥1.

5. The flexible LED light strip according to claim 4, characterized in that: Pins (21) of two electrodes of an LED circuit are led out from the end of the flexible circuit board (2).

6. The flexible LED light strip according to claim 4, characterized in that: The invention also comprises a long strip-shaped conductor array (5), the conductor array (5) extending along the length direction of the flexible circuit board (2), the conductor array (5) comprising at least two conductors (51) arranged side by side at an interval and an insulating layer (52), the two conductors (51) being electrically connected to two electrodes respectively, the insulating layer (52) covering the flexible circuit board (2) and the two conductors (51), and the covering layer (4) covering the flexible circuit board (2) and the conductor array (5).

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