An LED lamp panel with external resistance and built-in rectifier bridge

Abstract

The application discloses an external resistance built-in rectifier bridge LED lamp panel, comprising a lamp panel body, a light emitting diode rectifier circuit connected with a power port is arranged in the lamp panel body, an external resistance is arranged outside the lamp panel body, the external resistance is connected with the input end of the light emitting diode rectifier circuit through a flying wire or a jumper wire, so as to stabilize the rectification current of the light emitting diode rectifier circuit. Compared with the traditional rectifier circuit adopting the built-in resistance design, since the built-in resistance value is fixed, the same LED lamp panel can only adapt to a single power supply voltage, and the light emitting diode rectifier circuit of the LED lamp panel is externalized, so that resistors with different resistance values can be replaced according to different power supply voltages, and the demand that the same LED lamp panel adapts to various power supply voltages is realized. In addition, the design of the external resistance can avoid the superposition of the heat generated by the resistor itself and the heat generated by the light emitting diode conduction, so that the temperature of the LED lamp panel is relatively high, and the working current after rectification is unstable due to the influence of the temperature of the LED lamp panel.

Description

Technical Field This utility model relates to the field of lighting fixture technology, and in particular to an LED light board with an external resistor and a built-in rectifier bridge. Background Technology LED light boards are generally assembled using FPC as the circuit board and surface-mount LEDs. They have a wide range of applications and are widely used in industries such as furniture, automobiles, advertising, lighting, ships, and bars.

[0001] Most existing LED light boards use built-in resistors in their rectifier circuits. However, because the resistance value of the built-in resistors is fixed, the same LED light board can only be adapted to a single power supply voltage, which cannot meet the needs of various power supply voltage scenarios and has poor adaptability. In addition, the heat generated by the built-in resistors during operation will be superimposed on the heat generated by the LED conduction, resulting in a higher overall temperature of the LED light board. This makes the rectified operating current / voltage susceptible to fluctuations due to high temperature changes. Utility Model Content To address the technical issues of poor adaptability and fluctuations in rectified operating current / voltage caused by the use of built-in resistors in the rectifier circuit of current LED light boards, this invention provides an LED light board with an external resistor and a built-in rectifier bridge.

[0002] To achieve the above objectives, this utility model is implemented by the following technical solution: An LED light board with an external resistor and a built-in rectifier bridge includes a light board body, the light board body having a power port, a light-emitting diode rectifier circuit connected to the power port inside the light board body, and an external resistor outside the light board body. The external resistor is connected to the input terminal of the light-emitting diode rectifier circuit via a jumper wire or a jumper wire to stabilize the rectified current of the light-emitting diode rectifier circuit.

[0003] By adopting the above technical solution, compared with the traditional rectifier circuit that uses built-in resistors, where the built-in resistor value is fixed and the same LED board can only adapt to a single power supply voltage, the LED rectifier circuit of the LED board uses external resistors. Resistors with different values ​​can be replaced according to different power supply voltages, so that the same LED board can adapt to multiple power supply voltages. Secondly, the design of external resistors can avoid the superposition of the resistor's own heat generation and the heat generation of the LED during conduction, which would cause the LED board temperature to be high, making the rectified working current unstable due to the temperature of the LED board.

[0004] As described above, in an LED light board with an external resistor and a built-in rectifier bridge, the LED rectifier circuit includes a first input branch, a second input branch, an intermediate branch, a positive output branch, and a negative output branch. The output terminals of the first input branch and the second input branch are respectively connected to the input terminal of the intermediate branch. The output terminal of the intermediate branch is respectively connected to the input terminals of the positive output branch and the negative output branch. The output terminals of the positive output branch and the negative output branch are used to output rectified current.

[0005] As described above, in an LED light board with an external resistor and a built-in rectifier bridge, when the AC power input to the power port is in a positive cycle, the input terminal of the first input branch is connected to the first AC output terminal of the power port, the output terminal of the first input branch is connected to the input terminal of the intermediate branch, and the output terminal of the intermediate branch is connected to the input terminal of the negative output branch, so as to realize the rectification of the positive cycle AC power.

[0006] As described above, in an LED light board with an external resistor and a built-in rectifier bridge, when the AC power input to the power port is in a negative cycle, the input terminal of the second input branch is connected to the second AC output terminal of the power port, the output terminal of the second input branch is connected to the input terminal of the intermediate branch, and the output terminal of the intermediate branch is connected to the input terminal of the positive output branch, so as to realize the rectification of the negative cycle AC power.

[0007] As described above, in an LED light board with an external resistor and a built-in rectifier bridge, the first input branch includes a first group of light-emitting diodes (LEDs). The anode of the first LED group is connected to the first AC output terminal of the power supply port, and the cathode of the first LED group is connected to the input terminal of the intermediate branch. The first LED group consists of at least two LEDs connected in series.

[0008] As described above, in an LED light board with an external resistor and a built-in rectifier bridge, the second input branch includes a second group of light-emitting diodes. The anode of the second group of light-emitting diodes is connected to the second AC output terminal of the power supply port, and the cathode of the second group of light-emitting diodes is connected to the input terminal of the intermediate branch. The second group of light-emitting diodes consists of at least two light-emitting diodes connected in series.

[0009] As described above, in an LED light board with an external resistor and a built-in rectifier bridge, the intermediate branch includes a third LED group. The anode of the third LED group is connected to the output terminal of the first input branch and the output terminal of the second input branch, respectively. The cathode of the third LED group is connected to the input terminal of the positive output branch and the input terminal of the negative output branch, respectively. The third LED group consists of at least two LEDs connected in series.

[0010] As described above, in an LED light board with an external resistor and a built-in rectifier bridge, the positive output branch includes a fourth LED group. The anode of the fourth LED group is connected to the output terminal of the intermediate branch, and the cathode of the fourth LED group outputs a rectified current of positive periodic alternating current. The fourth LED group consists of at least two LEDs connected in series.

[0011] As described above, in an LED light board with an external resistor and a built-in rectifier bridge, the negative output branch includes a fifth LED group. The anode of the fifth LED group is connected to the output terminal of the intermediate branch, and the cathode of the fifth LED group outputs a rectified current of negative periodic AC. The fifth LED group consists of at least two LEDs connected in series.

[0012] As described above, an LED light board with an external resistor and a built-in rectifier bridge is provided in the main body of the light board, and the fluorescent powder layer is used to wrap the light-emitting diode rectifier circuit.

[0013] Compared with the prior art, the LED light board with an external resistor and an integrated rectifier bridge proposed in this utility model has the following advantages: 1. The LED light board proposed in this utility model has external resistors, which can be replaced with resistors of different values ​​according to different power supply voltages, so that the same LED light board can adapt to multiple power supply voltages. Secondly, the design of external resistors can avoid the superposition of the heat generated by the resistors themselves and the heat generated by the LEDs conducting, which would cause the LED light board temperature to be too high, making the rectified operating current unstable due to the temperature of the LED light board. 2. The LED rectifier circuit proposed in this utility model achieves full-cycle rectification of the AC power through the alternating conduction of the first and second input branches during AC power cycle changes, making the LED beads emit light continuously and stably, and avoiding the obvious flickering problem caused by AC power cycle changes; secondly, each branch of the LED rectifier circuit is equipped with LED groups, so that it can emit light while achieving rectification, thereby improving the overall luminous effect of the LED light board. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of the structure of the metal layer of this utility model; Figure 2 This is a schematic diagram of the LED rectifier circuit of this utility model. Detailed Implementation To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0015] Please refer to Figures 1 to 2 As shown in the embodiment of this specification, an LED light board with an external resistor and an internal rectifier bridge is proposed, including a light board body 1, wherein the light board body 1 is provided with a power port 2.

[0016] Specifically, the lamp board body 1 is provided with a light-emitting diode rectifier circuit 10 connected to the power port 2, and an external resistor 20 is provided outside the lamp board body 1. The external resistor 20 is connected to the input terminal of the light-emitting diode rectifier circuit 10 through a jumper wire or a jumper wire to stabilize the rectified current of the light-emitting diode rectifier circuit 10.

[0017] In this embodiment, the LED rectifier circuit of the LED light board has an external resistor. Compared with the traditional rectifier circuit that uses an internal resistor, the internal resistor has a fixed resistance value, and the same LED light board can only adapt to a single power supply voltage. However, the external resistor can replace the resistor with a different resistance value according to different power supply voltages, so that the same LED light board can adapt to multiple power supply voltages. Secondly, the design of the external resistor can avoid the superposition of the resistor's own heat generation and the heat generation of the LED during conduction, which would cause the LED light board temperature to be high, making the rectified operating current unstable due to the temperature of the LED light board.

[0018] In addition, the built-in LED rectifier circuit not only performs rectification, but also converts the ineffective power consumption during rectification by the rectifier bridge into light energy output, which reduces energy loss and avoids the problem of light flickering caused by alternating current cycles.

[0019] Furthermore, as a preferred embodiment of this solution and not a limitation thereof, the light-emitting diode rectifier circuit 10 includes a first input branch 11, a second input branch 12, an intermediate branch 13, a positive output branch 14, and a negative output branch 15. The output terminals of the first input branch 11 and the second input branch 12 are respectively connected to the input terminal of the intermediate branch 13. The output terminal of the intermediate branch 13 is respectively connected to the input terminals of the positive output branch 14 and the negative output branch 15. The output terminals of the positive output branch 14 and the negative output branch 15 are used to output rectified current.

[0020] In a preferred embodiment, the first input branch 11 includes a first light-emitting diode group, the anode of the first light-emitting diode group is connected to the first AC output terminal of the power supply port 2, and the cathode of the first light-emitting diode group is connected to the input terminal of the intermediate branch 13.

[0021] The first group of light-emitting diodes consists of at least two light-emitting diodes connected in series.

[0022] Preferably, the first light-emitting diode in this embodiment is composed of two light-emitting diodes connected in series.

[0023] In this embodiment, when the AC power output from the power port is in a positive cycle, the first AC output terminal of the power port outputs a positive potential, causing the first LED group to conduct in the forward direction. At this time, the positive cycle current flows along the first input branch and is rectified through the intermediate branch, converting the sine wave of the positive cycle AC power into a smooth DC wave. The first LED group emits light at the same time as the AC power is conducting in the positive cycle, realizing the synchronous start of the rectification path conduction and light emission, improving energy utilization efficiency and enhancing the overall light emission effect of the LED light board.

[0024] In a preferred embodiment, the second input branch 12 includes a second group of light-emitting diodes (LEDs), the anode of the second LED group is connected to the second AC output terminal of the power supply port 2, and the cathode of the second LED is connected to the input terminal of the intermediate branch 13.

[0025] The second group of light-emitting diodes consists of at least two light-emitting diodes connected in series.

[0026] Preferably, the second light-emitting diode in this embodiment is composed of two light-emitting diodes connected in series.

[0027] In this embodiment, when the AC power output from the power port is in a negative cycle, the first AC output terminal of the power port outputs a reverse potential, and the second AC output terminal outputs a positive potential. At this time, the first input branch is reverse cut off, and the second input branch is forward-conducting, causing the second LED group to be forward-conducting. At this time, the negative cycle current flows along the second input branch through the intermediate branch for rectification, converting the sine wave of the negative cycle AC power into a smooth DC wave. The second LED group emits light at the same time as the negative cycle of the AC power is turned on, realizing the synchronous start of rectification and light emission, improving energy utilization efficiency and enhancing the overall luminous effect of the LED light board.

[0028] In a preferred embodiment, the intermediate branch 13 includes a third light-emitting diode group, the anode of which is connected to the output terminal of the first input branch 11 and the output terminal of the second input branch 12, respectively, and the cathode of which is connected to the input terminal of the positive output branch 14 and the input terminal of the negative output branch 15, respectively.

[0029] The third group of light-emitting diodes consists of at least two light-emitting diodes connected in series.

[0030] Preferably, the third light-emitting diode in this embodiment is composed of 10 light-emitting diodes connected in series.

[0031] In this embodiment, the third group of light-emitting diodes in the middle branch undertakes the rectification of the AC power throughout the entire cycle. At the same time, the unidirectional conduction characteristic of the light-emitting diodes rectifies the AC power into DC power with a smooth waveform and no reverse pulse, providing a stable operating current for the LED light board.

[0032] In a preferred embodiment, the positive output branch 14 includes a fourth light-emitting diode group, the anode of the fourth light-emitting diode group is connected to the output terminal of the intermediate branch 13, and the cathode of the fourth light-emitting diode group outputs a rectified current of positive periodic alternating current.

[0033] The fourth group of light-emitting diodes consists of at least two light-emitting diodes connected in series.

[0034] Preferably, the fourth light-emitting diode in this embodiment is composed of two light-emitting diodes connected in series.

[0035] In a preferred embodiment, the negative output branch 15 includes a fifth light-emitting diode group, the anode of the fifth light-emitting diode group is connected to the output terminal of the intermediate branch 13, and the cathode of the fifth light-emitting diode group outputs the rectified current of the negative cycle AC power.

[0036] The fifth group of light-emitting diodes consists of at least two light-emitting diodes connected in series.

[0037] Preferably, the fifth light-emitting diode in this embodiment is composed of two light-emitting diodes connected in series.

[0038] In this embodiment, both the positive and negative output branches are equipped with LED groups, so that when the rectified current is output, the positive and negative output branches will also light up simultaneously, improving energy utilization efficiency. Secondly, since the LED groups of the first input branch, the second input branch and the intermediate branch are superimposed, the light emission can be achieved without gaps throughout the AC cycle, avoiding the flickering problem caused by the AC cycle switching of traditional LED light boards.

[0039] It is worth noting that the number of LEDs connected in series in each branch of the LED rectifier circuit 10 can be adjusted to meet different requirements for LED beads with different operating voltage / current requirements.

[0040] In a preferred embodiment, when the AC power input to the power port 2 is in a positive cycle, the input terminal of the first input branch 11 is connected to the first AC output terminal of the power port 2, the output terminal of the first input branch 11 is connected to the input terminal of the intermediate branch 13, and the output terminal of the intermediate branch 13 is connected to the input terminal of the negative output branch 15, so as to realize the rectification of the positive cycle AC power.

[0041] When the AC power input to the power port 2 is in a negative cycle, the input terminal of the second input branch 12 is connected to the second AC output terminal of the power port 2, the output terminal of the second input branch 12 is connected to the input terminal of the intermediate branch 13, and the output terminal of the intermediate branch 13 is connected to the input terminal of the positive output branch 14, so as to realize the rectification of the negative cycle AC power.

[0042] Specifically, when the AC current is in a positive cycle, the first AC output terminal of power port 2 outputs a positive potential, and the second AC output terminal outputs a reverse potential. At this time, due to the unidirectional conduction characteristic of the light-emitting diode, the first input branch 11 is forward-conducting, and the second input branch 12 is reverse-cut off. At this time, the positive cycle AC current flows along the first input branch 11 to the intermediate branch 13. The third light-emitting diode group in the intermediate branch 13 rectifies the positive cycle AC current and converts it into a smooth DC wave. At the same time, the output terminal of the intermediate branch 13 and the input terminal of the negative output branch 15 are forward-biased, so the rectified conduction current will be output along the negative output branch 15 to provide positive cycle rectified current for the LED beads. When the AC power switches from a positive cycle to a negative cycle, the first AC output terminal of power port 2 outputs a reverse potential, and the second AC output terminal outputs a positive potential. At this time, the first input branch 11 is reverse cut off, and the second input branch 12 is forward turned on. The negative cycle AC power flows along the second input branch 12 to the intermediate branch 13. The third LED group in the intermediate branch 13 rectifies the negative cycle AC power and converts it into a smooth DC wave. At the same time, the output terminal of the intermediate branch 13 and the input terminal of the positive output branch 14 are forward biased, so the rectified conduction current will be output along the positive output branch 14 to provide negative cycle rectified current for the LED beads.

[0043] In this embodiment, the LED rectifier circuit built into the LED light board rectifies the AC power throughout the entire cycle by alternating the conduction of the first and second input branches during AC power cycle changes. This ensures that the LED beads emit light continuously and stably, avoiding the obvious flickering problem caused by AC power cycle changes. Furthermore, each branch of the LED rectifier circuit is equipped with LED groups, which enables the LEDs to emit light while achieving rectification, thus improving the overall luminous effect of the LED light board.

[0044] Furthermore, as a preferred embodiment of this solution and not a limitation, the lamp board body 1 is provided with a fluorescent powder layer, which is used to wrap the light-emitting diode rectifier circuit 10.

[0045] In this embodiment, the fluorescent powder layer encapsulates the LED rectifier circuit, preventing the LED rectifier circuit from being corroded or damaged by external environment or collision, thus reducing the risk of rectification failure; secondly, the fluorescent powder layer can enhance the light diffusion of the LED, expand the illumination range of the LED light board, and improve the overall lighting comfort of the LED light board.

[0046] Those skilled in the art should understand that the above description is one embodiment provided in conjunction with specific content, and does not imply that the specific implementation of this utility model is limited to these descriptions. Furthermore, due to differences in industry naming conventions, it is not limited to the above names or English names. Any methods or structures similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered within the scope of protection of this utility model.

Claims

1. An LED light board with an external resistor and a built-in rectifier bridge, characterized in that, The lamp board includes a main body (1), which has a power port (2). The main body (1) has a light-emitting diode rectifier circuit (10) connected to the power port (2) inside. The main body (1) has an external resistor (20) outside. The external resistor (20) is connected to the input terminal of the light-emitting diode rectifier circuit (10) through a jumper wire or jumper wire to stabilize the rectified current of the light-emitting diode rectifier circuit (10).

2. The LED light board with an external resistor and built-in rectifier bridge according to claim 1, characterized in that, The LED rectifier circuit (10) includes a first input branch (11), a second input branch (12), an intermediate branch (13), a positive output branch (14), and a negative output branch (15). The output terminals of the first input branch (11) and the second input branch (12) are respectively connected to the input terminal of the intermediate branch (13). The output terminal of the intermediate branch (13) is respectively connected to the input terminals of the positive output branch (14) and the negative output branch (15). The output terminals of the positive output branch (14) and the negative output branch (15) are used to output rectified current.

3. The LED light board with an external resistor and built-in rectifier bridge according to claim 2, characterized in that, When the AC power input to the power port (2) is in a positive cycle, the input terminal of the first input branch (11) is connected to the first AC output terminal of the power port (2), the output terminal of the first input branch (11) is connected to the input terminal of the intermediate branch (13), and the output terminal of the intermediate branch (13) is connected to the input terminal of the negative output branch (15) to achieve rectification of the positive cycle AC power.

4. The LED light board with an external resistor and built-in rectifier bridge according to claim 2, characterized in that, When the AC power input to the power port (2) is in a negative cycle, the input terminal of the second input branch (12) is connected to the second AC output terminal of the power port (2), the output terminal of the second input branch (12) is connected to the input terminal of the intermediate branch (13), and the output terminal of the intermediate branch (13) is connected to the input terminal of the positive output branch (14) to realize the rectification of the negative cycle AC power.

5. The LED light board with an external resistor and built-in rectifier bridge according to claim 2, characterized in that, The first input branch (11) includes a first light-emitting diode group. The anode of the first light-emitting diode group is connected to the first AC output terminal of the power supply port (2), and the cathode of the first light-emitting diode group is connected to the input terminal of the intermediate branch (13). The first light-emitting diode group consists of at least two light-emitting diodes connected in series.

6. The LED light board with an external resistor and a built-in rectifier bridge according to claim 2, characterized in that, The second input branch (12) includes a second light-emitting diode group. The anode of the second light-emitting diode group is connected to the second AC output terminal of the power supply port (2), and the cathode of the second light-emitting diode group is connected to the input terminal of the intermediate branch (13). The second light-emitting diode group consists of at least two light-emitting diodes connected in series.

7. The LED light board with an external resistor and built-in rectifier bridge according to claim 2, characterized in that, The intermediate branch (13) includes a third light-emitting diode group. The anode of the third light-emitting diode group is connected to the output terminal of the first input branch (11) and the output terminal of the second input branch (12), respectively. The cathode of the third light-emitting diode group is connected to the input terminal of the positive output branch (14) and the input terminal of the negative output branch (15), respectively. The third light-emitting diode group is composed of at least two light-emitting diodes connected in series.

8. The LED light board with an external resistor and built-in rectifier bridge according to claim 2, characterized in that, The positive output branch (14) includes a fourth light-emitting diode group. The anode of the fourth light-emitting diode group is connected to the output terminal of the intermediate branch (13). The cathode of the fourth light-emitting diode group outputs a rectified current of positive periodic alternating current. The fourth light-emitting diode group is composed of at least two light-emitting diodes connected in series.

9. The LED light board with an external resistor and built-in rectifier bridge according to claim 2, characterized in that, The negative output branch (15) includes a fifth light-emitting diode group. The anode of the fifth light-emitting diode group is connected to the output terminal of the intermediate branch (13). The cathode of the fifth light-emitting diode group outputs a rectified current of negative periodic alternating current. The fifth light-emitting diode group is composed of at least two light-emitting diodes connected in series.

10. The LED light board with an external resistor and built-in rectifier bridge according to claim 2, characterized in that, The main body of the lamp board (1) is also provided with a fluorescent powder layer, which is used to wrap the light-emitting diode rectifier circuit (10).

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