Electrodeless high-voltage lamp strip
By dividing the LEDs of the high-voltage LED strip into two series groups, with the positive and negative electrodes alternately connected to different main lines, the high cost and glare issues caused by the bridge rectifier are solved, achieving a constant lighting effect and cost reduction.
Patent Information
- Application Number
- CN202520209936.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-25
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-01-25
AI Technical Summary
The use of bridge rectifiers in existing high-voltage LED light strips results in high costs, low energy efficiency, and noticeable LED flashing frequency, which affects aesthetics and wastes electricity.
The design employs a stepless design, with LEDs divided into two series groups. The positive and negative electrodes are alternately connected to different main lines, allowing adjacent LEDs to light up and turn off alternately, eliminating the need for a bridge rectifier.
This achieves a constant-on LED strip effect, reduces costs, avoids LED flickering, and improves energy efficiency and market competitiveness.
Smart Images
Figure CN223795218U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of LED strip lights, specifically a stepless high-voltage LED strip light. Background Technology
[0002] LED light strips are designed with evenly spaced cut sections, allowing each segment to be cut off and used individually. LED light strips are divided into high-voltage and low-voltage strips. High-voltage strips are directly connected to 220V or 110V household electricity. Current high-voltage LED light strips use a bridge rectifier in each cut section to convert AC to DC before inputting it to the LEDs. The mainstream market typically uses products with 120, 180, or 240 LEDs per meter. Generally, each cut section consists of 12 18V LEDs and a resistor connected in series, then connected to the bridge rectifier's output circuit. Therefore, one meter of light strip requires 10, 15, or 20 bridge rectifiers. The cost of using bridge rectifiers alone is over 0.2 yuan per meter, while the factory price of such high-voltage light strips with bridge rectifiers is only around 1.5 yuan. The bridge rectifier accounts for over ten percent of the selling price, a significant portion of the cost. LED light strips are already widely distributed and popular products, and such widely distributed products are very sensitive to cost and price; low cost is essential for market competitiveness.
[0003] Specifically, alternating current (AC) changes periodically according to a sine curve. For example, my country's AC is 220V, 50Hz, and changes 50 times per second, alternating between positive and negative terminals according to a sine curve. Since LEDs are semiconductor light emitters, their positive and negative terminals are fixed. Therefore, current high-voltage LED strips solder multiple LEDs onto a single circuit, unifying the connection so that all LEDs' positive terminals are connected to positive terminals and their negative terminals to negative terminals. This connection method requires a bridge rectifier to process the AC current so that the positive and negative terminals are fixed in one direction, transforming the sine curve into a sinusoidal curve. The circuit shows a fluctuating, cyclical curve, which is then connected to an LED. The positive terminal is connected to the positive terminal of the LED, and the negative terminal is connected to the negative terminal of the LED. If the AC power is directly connected to this type of LED strip without going through a bridge rectifier, the positive and negative terminals of the AC power will alternate and reverse. When the AC power switches to the negative terminal connected to the positive terminal of the LED, the LED will immediately turn off. When it switches to the positive terminal connected to the positive terminal of the LED, the LED will immediately turn on. This causes the LED to flash continuously, turning on and off 50 times per second. This flashing frequency is clearly visible to the naked eye, and it also wastes half of the electricity.
[0004] Therefore, it is necessary to eliminate bridge rectifiers to reduce costs and improve energy efficiency. Utility Model Content
[0005] The present invention aims to solve at least one of the problems of the prior art. To this end, the present invention provides a stepless high-voltage light strip, which eliminates the need for a bridge rectifier, and the light strip does not distinguish between positive and negative terminals when connected to AC power.
[0006] The technical solution adopted by this utility model to solve its technical problem is:
[0007] A stepless high-voltage LED strip includes: a circuit board with a first main line and a second main line for connecting to AC power; the circuit board includes multiple cuttable segments with multiple secondary lines; and multiple LEDs on each cuttable segment. The LEDs are divided into two series groups. The positive terminal of the first series group is electrically connected to the first main line, and the negative terminal is electrically connected to the second main line. The positive terminal of the second series group is electrically connected to the second main line, and the negative terminal is electrically connected to the first main line. The LEDs in the two series groups are spaced apart, such that among two adjacent LEDs on the cuttable segment, one is located in the first series group and the other is located in the second series group. When AC power is applied, the adjacent LEDs alternately turn on and off.
[0008] Optionally, the LEDs in the first series group are connected in series via the secondary line, and the LEDs in the second series group are connected in series via the secondary line.
[0009] Optionally, the LEDs in the first series group are divided into multiple parallel groups, and the parallel groups are connected in series with each other; the LEDs in the second series group are divided into multiple parallel groups, and the parallel groups are connected in series with each other.
[0010] Optionally, the first series group and the second series group are electrically connected only at their beginning and end; or, the first series group and the second series group are electrically connected at their beginning and end, and are electrically connected in the middle through the secondary line.
[0011] Optionally, the positive and negative terminals of two adjacent LEDs can be oriented in the same or opposite directions.
[0012] Optionally, the positive and negative electrodes of the LED are arranged along the width direction of the circuit board or along the length direction of the circuit board.
[0013] Optionally, a resistor is connected in series in the first series group and / or the second series group, wherein the resistor is set separately in each series group, or the resistor is shared by the two series groups.
[0014] Optionally, in the multiple parallel groups, the number of LEDs in the parallel groups may be the same or different.
[0015] Optionally, the LEDs are arranged in a single row or in two rows on the circuit board.
[0016] This utility model has at least one of the following beneficial effects: In this embodiment, the LEDs on the sheared segment are divided into two series groups. The positive terminal of the first series group is electrically connected to the first main line, and the negative terminal is electrically connected to the second main line. In the second series group, the positive terminal is electrically connected to the second main line, and the negative terminal is electrically connected to the first main line. The LEDs in the two series groups are spaced apart, so that among two adjacent LEDs on the sheared segment, one is located in the first series group and the other in the second series group. When the light strip described in this embodiment is connected to a 220V or 110V high-voltage AC power source, there is no need to distinguish the positive and negative terminals of the light strip. That is, the first and second main lines can be connected to AC power arbitrarily. Taking 50Hz AC power as an example, when AC power is applied, the positive and negative terminals of the current on the first and second main lines change. The LEDs on the first series group light up and the LEDs on the second series group turn off within one cycle (1 / 100th of a second). In the next cycle, the LEDs on the first series group turn off and the LEDs on the second series group light up. Because the LEDs in the two series groups are spaced apart, one of the two adjacent LEDs on the shearing segment is located in the first series group and the other in the second series group. Therefore, within one second, the LEDs on the light strip alternate between on and off 50 times in odd and even positions. According to the persistence of vision effect of the human eye, the user cannot distinguish the alternating on and off of the LEDs with the naked eye. The light strip appears to be constantly lit, which not only meets the lighting needs of the light strip but also eliminates the need for a bridge rectifier, greatly reducing the manufacturing cost of the light strip and helping it gain a good market competitiveness. Attached Figure Description
[0017] Figure 1.1 This is a schematic diagram of the circuit principle of a shearing segment in the first embodiment of this utility model;
[0018] Figure 1.2 This is a schematic diagram of the circuit board planar structure of a shearing segment in the first embodiment of this utility model;
[0019] Figure 1.3 This is a schematic diagram of the planar structure of a sheared segment of the light strip in the first embodiment of this utility model;
[0020] Figure 1.4 This is a schematic diagram of the planar structure of the front covering film on a sheared segment in the first embodiment of this utility model;
[0021] Figure 1.5 This is a circuit plan view of a shearing segment in the first embodiment of this utility model;
[0022] Figure 1.6 This is a circuit plan view of the three shearing segments in the first embodiment of this utility model;
[0023] Figures 2.1-2.3These are, respectively, a schematic diagram of the circuit principle of a shearing segment, a schematic diagram of the circuit board planar structure, and a schematic diagram of the lamp strip planar structure in the second embodiment of this utility model;
[0024] Figures 3.1-3.3 These are, respectively, a schematic diagram of the circuit principle of a shearing segment, a schematic diagram of the circuit board planar structure, and a schematic diagram of the light strip planar structure in the third embodiment of this utility model;
[0025] Figures 4.1-4.3 These are, respectively, a schematic diagram of the circuit principle of a shearing segment, a schematic diagram of the circuit board planar structure, and a schematic diagram of the light strip planar structure in the fourth embodiment of this utility model;
[0026] Figures 5.1-5.3 These are, respectively, a schematic diagram of the circuit principle of a shearing segment, a schematic diagram of the circuit board planar structure, and a schematic diagram of the lamp strip planar structure in the fifth embodiment of this utility model;
[0027] Figures 6.1-6.3 These are, respectively, a schematic diagram of the circuit principle of a shearing segment, a schematic diagram of the circuit board planar structure, and a schematic diagram of the light strip planar structure in the sixth embodiment of this utility model;
[0028] Figures 7.1-7.3 These are, respectively, a schematic diagram of the circuit principle of a shearing segment, a schematic diagram of the circuit board planar structure, and a schematic diagram of the light strip planar structure in the 7th embodiment of this utility model;
[0029] Figures 8.1-8.3 These are, respectively, a schematic diagram of the circuit principle of a shearing segment, a schematic diagram of the circuit board planar structure, and a schematic diagram of the light strip planar structure in the 8th embodiment of this utility model;
[0030] Figures 9.1-9.3 These are, respectively, a schematic diagram of the circuit principle of a shearing segment, a schematic diagram of the circuit board planar structure, and a schematic diagram of the lamp strip planar structure in the 9th embodiment of this utility model;
[0031] Figures 10.1-10.3 These are, respectively, a schematic diagram of the circuit principle of a shearing segment, a schematic diagram of the circuit board planar structure, and a schematic diagram of the lamp strip planar structure in the 10th embodiment of this utility model;
[0032] In the schematic diagram of the circuit board planar structure, the first main line, the second main line, and the sub-line are represented by dashed lines because they are blocked by the front solder mask layer.
[0033] Explanation of icon numbers:
[0034] 1-Circuit board, 11-First main line, 12-Second main line, 13-Sub-line, 14-Cut solder pad, 2-LED, 3-Resistor, 4-Front solder resist film. Detailed Implementation
[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described below can be arbitrarily combined with each other.
[0036] The following provides many different implementation methods or examples for realizing the structure of this utility model.
[0037] See Figures 1.1-10.3 This utility model discloses a stepless high-voltage LED strip, comprising: a circuit board 1, wherein the circuit board 1 is provided with a first main line 11 and a second main line 12 for connecting AC power; the circuit board 1 includes multiple cuttable segments; the LED strip is very long, for example, 5 meters, 10 meters or even longer; the user can cut the LED strip according to usage requirements; therefore, the LED strip has multiple sets of cutting pads 14; the user cuts the LED strip at the cutting pads and then connects it to the AC power source at the cutting pads for use; therefore, the circuit board 1 can have multiple cutting segments, such as... Figure 1.6 As shown, the circuit has three sheared segments; each sheared segment has multiple secondary lines 13, and multiple LEDs 2 are also installed on each sheared segment. The LEDs 2 are divided into two series groups. The positive terminal of the first series group is electrically connected to the first main line 11, and the negative terminal is electrically connected to the second main line 12. The positive terminal of the second series group is electrically connected to the second main line 12, and the negative terminal is electrically connected to the first main line 11. The LEDs 2 in the two series groups are spaced apart, such that for every two adjacent LEDs on the sheared segment, one is located in the first series group and the other in the second series group. When AC power is applied, adjacent LEDs alternately turn on and off. See details... Figure 1.1 and Figure 1.3 As shown, the 1st, 3rd, and 5th LEDs from left to right form the first series group, and the 2nd, 4th, and 6th LEDs form the second series group. In the first embodiment, to more clearly demonstrate the circuit and LED design, Figure 1.2 A schematic diagram of the circuit board's planar structure is shown. Figure 1.4 This is a plan view of the front solder mask 4 on the circuit board, which has several pad windows. Figure 1.5 yes Figure 1.2 Circuit diagram after removing the front solder mask 4; see details below. Figure 2.1 and Figure 2.3 As shown, the 1st, 3rd, 5th, and 7th LEDs from left to right form the first series group, and the 2nd, 4th, 6th, and 8th LEDs form the second series group.
[0038] See details Figure 1.1 , Figure 3.1 , Figure 4.1 , Figure 5.1 , Figure 10.1As shown, in some embodiments of this utility model, the LEDs 2 in the first series group are connected in series through the sub-line 13, and the LEDs 2 in the second series group are connected in series through the sub-line 13. That is, the multiple LEDs in each series group are connected in series.
[0039] See details Figure 2.1 , Figure 6.1 , Figure 7.1 , Figure 8.1 As shown, in some embodiments of this utility model, the LEDs in the first series group are divided into multiple parallel groups, and the parallel groups are connected in series with each other; the LEDs in the second series group are divided into multiple parallel groups, and the parallel groups are connected in series with each other. That is, the multiple LEDs in each series group are divided into multiple parallel groups, for example in... Figure 2.1 In this system, each series group contains 4 LEDs, and every 2 LEDs form a parallel group, for a total of 2 parallel groups. Then, these 2 parallel groups are connected in series.
[0040] See details Figure 3.1 , Figure 4.1 , Figure 5.1 As shown, in some embodiments of this utility model, the first series group and the second series group are electrically connected only at their beginning and end; or, in other embodiments, see details below. Figure 1.1 , Figure 2.1 , Figure 6.1 , Figure 7.1 , Figure 8.1 , Figure 9.1 as well as Figure 10.1 As shown, the first series group and the second series group are electrically connected at their beginning and end, and are electrically connected in the middle through the sub-line 13.
[0041] See details Figure 3.1 As shown, in some embodiments of this utility model, the positive and negative electrodes of two adjacent LEDs face the same direction; or in other embodiments, see details below. Figure 1.1 , Figure 2.1 , Figure 4.1 , Figure 5.1 , Figure 6.1 , Figure 7.1 , Figure 8.1 , Figure 9.1 as well as Figure 10.1 As shown, the positive and negative terminals of two adjacent LEDs face opposite directions.
[0042] See details Figure 1.3 , Figure 2.3 , Figure 3.3 , Figure 4.3 , Figure 6.3 , Figure 7.3 , Figure 8.3 , Figure 9.3as well as Figure 10.3 As shown, in some embodiments of this utility model, the positive and negative electrodes of the LED are arranged along the width direction of the circuit board (i.e., vertically); see details below. Figure 5.3 As shown, in some other embodiments, the positive and negative terminals of the LED are arranged along the length of the circuit board.
[0043] In some embodiments of this utility model, a resistor 3 is connected in series in the first series group or / and the second series group. The resistor 3 acts as a voltage divider. See details below. Figure 5.1 As shown, the resistor 3 is individually disposed in each series group, or, in other embodiments, see [see details]. Figure 3.1 , Figure 4.1 , Figure 6.1 The resistor 3 is shared by two series groups.
[0044] In some embodiments of this utility model, among the multiple parallel groups, see details below. Figure 2.1 , Figure 6.1 , Figure 7.1 , Figure 8.1 As shown, the number of LEDs in the parallel groups is the same; in other embodiments, the number of LEDs in the parallel groups may be different, for example, one parallel group has 2 LEDs connected in parallel, and another parallel group has 10 LEDs connected in parallel.
[0045] In some embodiments of this utility model, the LEDs are arranged in a single row on the circuit board, as shown in Embodiments 1-10; in other embodiments, the LEDs can also be arranged in two rows (one row at the top and one row at the bottom) on the circuit board.
[0046] The working principle of the embodiment of this utility model is as follows: When the light strip described in this utility model embodiment is connected to a 220V or 110V high-voltage AC power source, there is no need to distinguish the positive and negative terminals of the light strip. That is, the first main line 11 and the second main line 12 can be connected to AC power at will. Taking 50HZ AC power as an example, when AC power is applied, the positive and negative terminals of the current on the first main line 11 and the second main line 12 change 50 times. Within one change cycle (1 / 100 second), the LED on the first series group lights up, and the LED on the second series group turns off. In the next change cycle, the LED on the first series group lights up. When LED D is off, the LEDs in the second series group are on. Because the LEDs in the two series groups are spaced apart, one of the two adjacent LEDs on the shear segment is in the first series group and the other is in the second series group. Therefore, within one second, the LEDs on the light strip alternate between on and off 50 times at odd and even positions. According to the persistence of vision effect of the human eye, the user cannot distinguish the alternation of on and off of the LEDs with the naked eye. The light strip appears to be constantly lit, which not only meets the lighting needs of the light strip but also eliminates the need for a bridge rectifier, greatly reducing the manufacturing cost of the light strip and helping it gain a good market competitiveness.
[0047] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A stepless high-voltage LED strip, characterized in that, include: The circuit board includes a first main line and a second main line for connecting AC power. The circuit board comprises multiple cuttable segments, each with multiple secondary lines. Each cuttable segment also has multiple LEDs, which are divided into two series groups. The positive terminal of the first series group is electrically connected to the first main line, and the negative terminal is electrically connected to the second main line. Similarly, the positive terminal of the second series group is electrically connected to the second main line, and the negative terminal is electrically connected to the first main line. The LEDs in the two series groups are spaced apart, such that among two adjacent LEDs on the cuttable segment, one is located in the first series group and the other in the second series group. When AC power is applied, adjacent LEDs alternately turn on and off.
2. The electrodeless high-voltage LED strip according to claim 1, characterized in that: The LEDs in the first series group are connected in series through the secondary line, and the LEDs in the second series group are connected in series through the secondary line.
3. The electrodeless high-voltage LED strip according to claim 1, characterized in that: The LEDs in the first series group are divided into multiple parallel groups, and the parallel groups are connected in series with each other; the LEDs in the second series group are divided into multiple parallel groups, and the parallel groups are connected in series with each other.
4. A stepless high-voltage LED strip according to any one of claims 1-3, characterized in that: The first series group and the second series group are electrically connected only at their beginning and end; or, the first series group and the second series group are electrically connected at their beginning and end, and are electrically connected in the middle through the secondary line.
5. A stepless high-voltage LED strip according to any one of claims 1-3, characterized in that: The positive and negative terminals of two adjacent LEDs are oriented in the same or opposite directions.
6. The electrodeless high-voltage LED strip according to claim 5, characterized in that: The positive and negative electrodes of the LED are arranged along the width of the circuit board or along the length of the circuit board.
7. The electrodeless high-voltage LED strip according to claim 2, characterized in that: A resistor is connected in series in the first series group and / or the second series group. The resistor is set separately in each series group, or the resistor is shared by the two series groups.
8. The electrodeless high-voltage LED strip according to claim 3, characterized in that: In the multiple parallel groups, the number of LEDs in the parallel groups may be the same or different.
9. The electrodeless high-voltage LED strip according to claim 1, characterized in that: The LEDs are arranged in a single row or in two rows on the circuit board.