LED flexible light strip with distributed voltage compensation function and voltage compensation method

Abstract

This invention discloses an LED flexible light strip with distributed voltage compensation function and a voltage compensation method. The light strip includes a flexible circuit board, LED light-emitting units, and multiple boost compensation modules. The boost compensation modules are integrated on the flexible circuit board using surface mount technology (SMT) and are correspondingly connected to the LED light-emitting units. Each boost compensation module detects the voltage drop at its input point due to line resistance in real time and boosts it to a set voltage value sufficient to drive the corresponding LED to emit light normally through an internal DC / DC boost circuit. This invention achieves active and localized compensation for line voltage drop by distributing micro boost modules on the light strip, fundamentally solving the industry problem of uneven brightness at the beginning and end of long-distance LED flexible light strips, while maintaining the flexibility and ease of installation of the light strip.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of LED soft light strips, in particular to an LED soft light strip with distributed voltage compensation function and a voltage compensation method. BACKGROUND

[0002] LED soft light strips have been widely used in indoor and outdoor decorative lighting, commercial display, landscape lighting, advertising backlight, cabinet atmosphere lighting, building contour lighting and other fields due to their advantages of softness, easy cutting, convenient installation, rich light colors and wide application scenarios. In actual engineering applications, in order to meet the needs of linear lighting over a long distance, it is often necessary to extend a single LED soft light strip along the length direction or connect multiple light strips end to end to form a continuous lighting structure of tens of meters or even longer.

[0003] Most of the existing LED soft light strips use low-voltage direct current power supply, such as 12V power supply or 24V power supply. Although this type of power supply has the advantages of high safety, good system compatibility and mature application, when the length of the light strip increases, the conductive lines on the flexible circuit board inevitably have a certain resistance. During the transmission of the working current along the length direction of the light strip, obvious voltage loss will occur on the lines. Especially in long-distance use scenarios, as the transmission distance increases, the LED light units near the power input end position can obtain a higher and more stable driving voltage, while the actual voltage obtained by the LED light units far from the power input end position gradually decreases, resulting in a decrease in the luminous intensity of the end LED light units, and thus forming a phenomenon of brighter front end and darker rear end. This phenomenon not only significantly affects the consistency of the overall lighting effect of the light strip, but also reduces the application experience and visual aesthetics of the product in high-quality lighting scenarios.

[0004] To address the aforementioned issues, existing technologies typically employ the following improvement methods. First, increasing the cross-sectional area of ​​the flexible circuit board conductors, such as using thicker copper foil, wider conductors, or adding parallel conductive lines, reduces line resistance and thus voltage loss during transmission. However, this approach increases the cost of flexible circuit board materials and may also increase the thickness of the light strip, reducing flexibility. Furthermore, its compensation effect remains limited as the strip length continues to increase. Second, adding power injection points in the middle or at multiple locations within the light strip shortens the single-segment current transmission path through multi-point power supply, thereby reducing the impact of voltage drop. While this method can improve brightness uniformity to some extent, it requires additional power supply lines, resulting in complex installation, high construction costs, and undermining the advantages of single-ended power supply and simple wiring for flexible light strips. Third, increasing the system power supply voltage to a higher level reduces the transmission current under the same power conditions, thereby lowering line voltage drop. While this method can delay the onset of voltage drop to some extent, it introduces new problems related to safety, compatibility, and system design complexity, and does not fundamentally solve the problem of insufficient voltage at the long-distance end.

[0005] Furthermore, while some existing LED strip light products integrate chips for drive control, such as pixel control chips, constant current drive chips, or local voltage regulator circuits, these circuits are primarily used for functions like color control, pixel addressing, constant current drive, or buck regulation. Their main function is to control or stabilize the existing input power, rather than actively compensating for the gradual attenuation of input voltage caused by line transmission. Especially when the input voltage is already lower than the normal operating requirements of the end LED light-emitting units, traditional voltage regulator or buck circuits usually cannot effectively boost this low voltage, thus still failing to eliminate the problem of brightness reduction at the tail end of long-distance flexible LED strips.

[0006] Therefore, how to effectively compensate for the voltage drop in the power transmission process of long-distance LED flexible light strips without significantly increasing the complexity of the light strip wiring, without damaging the flexible structure characteristics of the light strip, and without increasing the system cost too much, so that the LED light-emitting units at different positions of the light strip can obtain relatively consistent driving conditions, thereby achieving uniform brightness of the entire light strip, has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] To address the aforementioned problems, this invention provides an LED flexible light strip with distributed voltage compensation function and a voltage compensation method, which can effectively overcome the shortcomings of the prior art.

[0008] The present invention is achieved through the following technical solution: an LED flexible light strip with distributed voltage compensation function, comprising a flexible circuit board, a plurality of LED light-emitting units spaced apart along the length direction of the flexible circuit board, and a main power supply line disposed on the flexible circuit board; It also includes multiple boost compensation modules, which are surface-mounted on the flexible circuit board and electrically connected to the corresponding LED light-emitting units. The input terminal of each boost compensation module is connected to the main power line to obtain the input voltage at its location. The output terminal of each boost compensation module is connected to the corresponding LED light-emitting unit to boost the obtained input voltage to the output voltage or output current that meets the driving requirements of the corresponding LED light-emitting unit, so as to locally compensate for the line voltage drop generated during the transmission of the main power line, thereby ensuring that the LED light-emitting units at different positions of the LED flexible light strip maintain a consistent luminous brightness.

[0009] As a preferred technical solution, the plurality of boost compensation modules are configured one-to-one with the plurality of LED light-emitting units, and the output terminal of each boost compensation module is connected to the input terminal of the corresponding single LED light-emitting unit.

[0010] As a preferred technical solution, the plurality of boost compensation modules are arranged in groups corresponding to the plurality of LED light-emitting units, and the output terminal of each boost compensation module is connected to the input terminal of a group of LED light-emitting units for centralized compensation driving of the group of LED light-emitting units.

[0011] As a preferred technical solution, the boost compensation module is an integrated surface mount device, which integrates a boost control circuit and energy storage components, filtering components and feedback adjustment components that cooperate with the boost control circuit.

[0012] As a preferred technical solution, the boost compensation module integrates a switching regulator control chip, a power inductor, an input filter capacitor, an output filter capacitor, and a feedback resistor network.

[0013] As a preferred technical solution, the boost compensation module is a constant output voltage type boost compensation module, which is used to provide a preset output voltage to the corresponding LED light-emitting unit.

[0014] As a preferred technical solution, the boost compensation module is a constant output current type boost compensation module, which is used to provide a preset driving current to the corresponding LED light-emitting unit.

[0015] As a preferred technical solution, the main power supply line extends along the flexible circuit board, and the input terminals of the multiple boost compensation modules are connected in parallel to the main power supply line to form a parallel compensation network distributed along the flexible circuit board.

[0016] The present invention provides a voltage compensation method for LED flexible light strips, characterized by comprising the following steps: The main power supply line supplies power to the LED flexible light strip; Multiple boost compensation modules located at different positions on the flexible circuit board detect the actual input voltage at their respective input terminals. Each of the aforementioned boost compensation modules performs boost compensation on the driving voltage or driving current of the corresponding LED light-emitting unit based on the detected actual input voltage; The boost compensation module located downstream of the LED flexible light strip performs a higher degree of compensation than the boost compensation module located upstream, in order to compensate for the voltage attenuation caused by line transmission, so that the LED light-emitting units at different positions of the LED flexible light strip can obtain basically consistent luminous brightness.

[0017] As a preferred technical solution, the boost compensation module located upstream of the LED flexible light strip performs small boost compensation or direct output when its input voltage reaches the set condition, and the boost compensation module located downstream of the LED flexible light strip performs large boost compensation when its input voltage is lower than the set condition.

[0018] The beneficial effects of this invention are as follows: By distributing multiple boost compensation modules along the length of the flexible circuit board of the LED flexible light strip, and having each boost compensation module perform localized voltage compensation for the corresponding LED light-emitting unit, the voltage drop of the main power line during long-distance transmission can be corrected segment by segment. This effectively improves the problems of uneven brightness at the front end, dark end, and overall brightness of traditional LED flexible light strips when used for long-distance power supply, and significantly improves the light emission consistency and visual continuity of the entire light strip along its length.

[0019] Since the present invention uses a distributed compensation method, it does not require additional intermediate power supply points or complex multi-point wiring as some existing solutions do. Therefore, it can reduce construction difficulty and wiring costs while maintaining a simple installation method, making it particularly suitable for long-distance linear lighting scenarios.

[0020] Meanwhile, the boost compensation module is directly integrated onto the flexible circuit board via surface mounting, eliminating the need for a separate external compensation device. This allows the LED strip to maintain its original flexibility, thinness, and ease of cutting and installation while achieving voltage drop compensation.

[0021] Furthermore, the present invention can construct corresponding compensation output methods according to the driving requirements of different light-emitting units, which has good adaptability and scalability, and can meet the usage requirements of LED flexible light strips with different specifications, different power and different application scenarios. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 The voltage distribution is based on traditional long LED strip resistor-based voltage reduction or buck-based voltage reduction; Figure 2 This is a partial structural diagram of the LED flexible light strip according to Embodiment 1 of the present invention; Figure 3 for Figure 2 Circuit diagram showing the connection between the boost compensation module and the LED beads; Figure 4 This is a schematic diagram of the LED flexible light strip boost compensation circuit according to Embodiment 2 of the present invention; Figure 5 This is a schematic diagram of the voltage distribution of the present invention. Detailed Implementation

[0024] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0025] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0026] like Figures 2 to 5As shown, this invention provides an LED flexible light strip with distributed voltage compensation function. The strip comprises a flexible circuit board, a main power supply line disposed on the flexible circuit board, multiple LED light-emitting units spaced apart along the length of the flexible circuit board, and multiple boost compensation modules M2 and 2' distributed along the length of the flexible circuit board. The flexible circuit board can be formed by combining a flexible insulating substrate commonly used in the art with conductive copper foil, serving as a mounting carrier for various electronic components and ensuring the entire light strip is bendable, cutable, and easy to install. The main power supply line is formed on the flexible circuit board and extends along the length of the light strip, used to deliver the externally input DC power supply voltage to various positions on the light strip. The main power supply line includes at least a positive line V+ and a negative line GND. Auxiliary signal lines or protection lines can be added as needed according to different application requirements, but its basic function remains to provide a basic power supply channel for each boost compensation module and each LED light-emitting unit.

[0027] Combination Figure 2 and Figure 3 As can be seen, in this invention, multiple boost compensation modules M2 are directly mounted on the flexible circuit board using surface mounting, and are preferably distributed along the extension direction of the main power line. Each boost compensation module M2 is electrically connected to the corresponding LED bead 4, thereby enabling each light-emitting node to have independent local compensation capability. The LED bead 4 mentioned here constitutes an LED light-emitting unit. In the most basic embodiment, each LED light-emitting unit can be composed of a single LED bead 4, or in other embodiments, it can be formed by two or more LEDs connected in series, parallel, or a combination of series and parallel. For ease of explanation, Figure 1 and Figure 2 The embodiment shown uses a single LED bead 4 as the corresponding LED light-emitting unit, and each boost compensation module M2 drives one LED bead 4, thus making the distributed compensation principle of the present invention more intuitive.

[0028] In this implementation structure, the boost compensation module M2 preferably uses a small packaged device suitable for SMT mounting technology, such as a 1206 package, allowing it to be directly mounted on the surface of a flexible circuit board without the need for an additional external compensation board or external power conditioning module. The boost compensation module M2 integrates a switching regulator circuit based on a BOOST topology, which includes at least a boost control circuit, a switching transistor, an energy storage inductor, an input filter, an output filter, and a feedback regulation section. The input terminal Vin of the boost compensation module M2 is connected in parallel to the main power line to collect the actual input voltage at its node; its output terminal Vout is connected to the anode of the corresponding LED bead 4, and the cathode of the LED bead 4 is connected to the negative line GND. Therefore, even when the base voltage provided by the main power line drops, the boost compensation module M2 can still boost the node input voltage to a preset driving voltage level before supplying the corresponding LED bead 4. Therefore, each LED bead 4 is not directly powered by the bare bus voltage which has voltage drop and attenuation. Instead, the local voltage state is first compensated by the corresponding boost compensation module M2 before it is driven to emit light, thus effectively solving the problem of bright front end and dark rear end in traditional long-distance LED flexible light strips.

[0029] In this embodiment, the main power supply line is continuously laid out along the extension direction of the flexible circuit board, forming a parallel power supply structure for multiple boost compensation modules M2. That is, the input terminals of each boost compensation module M2 draw power from the main power supply line, rather than transmitting compensation voltage in series. This parallel compensation network structure allows each compensation node to independently compensate based on its local actual voltage state, preventing the impact of an abnormality in one node from being cascaded down to downstream nodes. It also helps improve the driving stability and reliability of the entire light strip. Furthermore, since the boost compensation module M2 is surface-mounted to the flexible circuit board, the entire light strip can still maintain good flexibility, thinness, and mass production consistency, making it suitable for manufacturing using conventional reflow soldering, surface mount assembly, and other processes.

[0030] like Figure 3The local circuit diagram further illustrates that each boost compensation module M2 forms a local compensation drive loop with its corresponding LED bead 4. In actual operation, an external DC power supply provides the main power line with a supply voltage, for example, a 24V DC input voltage. The first boost compensation module M2, located near the beginning of the light strip, is closest to the power input terminal. Its input terminal Vin detects a voltage value close to the system input voltage. At this point, the internal control circuit of this module determines that the input voltage basically meets the target drive conditions, and therefore performs only a small boost compensation, or, in some designs, a near-through light compensation output, for example, boosting approximately 24V to approximately 25V. This output terminal Vout then provides a stable drive voltage to the first LED bead 4, enabling it to emit light normally under the set operating conditions. As the power supply current continues to propagate downstream along the main power line, the actual voltage on the main power line will gradually decrease due to the impedance of the conductor itself. Therefore, the voltage detected at the input terminal Vin of the boost compensation module M2, located in the middle or end section, will gradually be lower than that at the front-end node, for example, it may drop from 24V to 22V, 21V, or even 20V. In this case, the boost compensation module M2 at the corresponding position detects its input state in real time through its internal feedback adjustment circuit, controls the switching transistor in the switching regulator to turn on and off according to the set duty cycle, so that the energy storage inductor completes the energy storage and release process. After output filtering, the lower input voltage is boosted to the preset target output voltage, for example, still stably outputting to about 25V, thereby ensuring that the corresponding LED bead 4 receives basically the same driving conditions as the front-end node.

[0031] In other words, in this invention, although the main power supply line still has a voltage drop along its length, this voltage drop no longer directly affects the final driving result of each LED bead 4. Instead, it is corrected locally at each node by multiple boost compensation modules M2 distributed along the light strip. Front-end nodes, due to their smaller voltage drop, only require minor compensation; rear-end nodes, due to their larger voltage drop, automatically perform a higher degree of compensation, ultimately making the driving platforms corresponding to each LED bead 4 more consistent. Thus, from a visual perspective, the luminous brightness of the entire light strip along its length maintains good continuity and uniformity, avoiding the phenomenon of a significantly brighter front section and a significantly darker rear section seen in traditional solutions. Simultaneously, since each compensation node is locally and independently adjustable, this invention is more adaptable to the expansion of the light strip length, maintaining good luminous consistency even over longer laying distances.

[0032] The boost compensation module M2 described in this invention is not limited to Figure 2 and Figure 3 The single LED bead 4-driving method shown can also be configured differently in other implementations depending on the structure of the light-emitting unit. For example, as Figure 4As shown, the present invention can also be implemented in another way. In this implementation, the LED light-emitting unit consists of three LEDs connected in series to form a light string. Each light string is a complete light-emitting unit, which is centrally compensated and driven by the corresponding boost compensation module M2'. In this case, the boost compensation module M2' is preferably configured as a constant output current type DC / DC boost converter. Its input terminal is also connected to the main power supply line, and its output terminal is connected to the total anode of the corresponding LED light string, while the total cathode of the LED light string is connected to GND. Unlike the embodiment one, which focuses on maintaining a stable output voltage, Figure 4 The illustrated implementation emphasizes providing a constant drive current to the LED strings, for example, the output current can be set to 20mA or other suitable values. In this way, even if there are slight differences in the total forward voltage drop between different LED strings due to component variability, the boost compensation module M2' can still ensure that each group of LED strings receives a consistent operating current through constant current control, thereby ensuring the uniformity of brightness performance across the entire LED strip. This is particularly suitable for RGB or multi-color LED strip scenarios where high requirements for color consistency, light mixing uniformity, and brightness consistency are necessary.

[0033] exist Figure 4 In the illustrated scheme, since a single LED light-emitting unit is composed of multiple LEDs connected in series, the driving voltage required for the corresponding node is typically higher compared to the single-LED driving method. This further highlights the advantages of the distributed boost compensation of this invention. Even if the input voltage of the main power line at the remote node has significantly decreased, the boost compensation module M2' can still provide stable driving for the corresponding LED string through boost and constant current control, avoiding the problem of insufficient voltage at the end of the bus causing the series LED string to fail to light up sufficiently or experience significant brightness decay. Therefore, this invention is not limited to a single driving model, but can flexibly select between constant voltage compensation mode and constant current compensation mode according to different LED light-emitting unit structures, thereby achieving high application adaptability.

[0034] Figure 5 The working principle and technical effects of this invention are illustrated more intuitively from the perspective of power supply performance. For example... Figure 1 As shown, in the traditional LED flexible light strip power supply structure, the bus voltage decreases approximately linearly with increasing power supply distance. Therefore, the closer to the end of the light strip, the lower the actual voltage supplied to the corresponding light-emitting unit, ultimately resulting in a decrease in brightness. However, in the distributed compensation scheme adopted in this invention, although the original voltage on the main power line also decreases segment by segment, at each node equipped with boost compensation modules M2 and 2', the local input voltage is actively boosted and restored to the target driving range by that node. Therefore, from the perspective of the actual power supply state obtained by each LED light-emitting unit, it does not continuously decline with the bus voltage, but rather forms multiple "step-like" stable driving platforms. In other words, Figure 5The invention does not simply raise the entire busbar as a whole, but rather corrects the voltage drop locally at each light-emitting node, so that each node obtains a sufficient, stable and more consistent voltage or current platform. This is the key difference between the invention and existing solutions that use thickened copper foil, multi-point power supply or centralized voltage boosting.

[0035] Furthermore, to make the technical solution of the present invention more stable and reliable, the boost compensation modules M2 and 2', in addition to the basic boost control circuit, can also be equipped with structures such as input filter capacitors, output filter capacitors, and feedback resistor networks. The input filter capacitors are used to smooth the ripple and transient fluctuations at the input of the main power supply line, reducing the impact of bus disturbances on local compensation stability; the output filter capacitors are used to reduce the ripple at the boost output, enabling the corresponding LED light-emitting unit to obtain a more stable driving voltage or current; the feedback resistor network is used to sample the output state and feed the sampling results back to the control circuit to dynamically adjust the switching duty cycle and achieve stable output. For the constant voltage boost compensation module M2, the feedback network is mainly used to stabilize the output voltage; for the constant current boost compensation module M2', the feedback path can be used to perform closed-loop adjustment of the output current through structures such as sampling resistors. All of these circuit configurations can be selected and optimized according to actual product specifications and power requirements, and are essentially equivalent circuit design methods that can be implemented by those skilled in the art under the concept of the present invention.

[0036] Furthermore, the correspondence between the multiple boost compensation modules M2, 2' and the multiple LED light-emitting units in this invention can also be adjusted according to actual design requirements. In some low-power, high-density LED strip products, this can be adopted... Figure 2 and Figure 3 The one-to-one correspondence shown indicates that each boost compensation module M2 corresponds to one LED bead 4, achieving the most precise distributed compensation capability. In other scenarios where cost, space, and drive efficiency need to be considered, a different approach can also be adopted. Figure 4 The grouping method shown refers to a single boost compensation module M2' simultaneously driving a group of LED light-emitting units. Regardless of the method used, the core principle is to distribute the compensation function along the length of the flexible circuit board, so that the compensation behavior is as close as possible to the actual nodes where voltage drop occurs and the load consumes power, thereby improving the brightness consistency of the entire light strip.

[0037] This invention also provides a voltage compensation method applicable to the aforementioned LED flexible light strip. In this method, a power supply voltage is first input to the entire LED flexible light strip through the main power supply line. Then, multiple boost compensation modules M2 and 2', located at different positions on the flexible circuit board, detect the actual input voltage at their respective input terminals. Each boost compensation module performs boost compensation on the driving voltage or driving current of the corresponding LED light-emitting unit based on the detected input voltage state. Specifically, the boost compensation module located upstream of the light strip performs small-scale compensation or near-direct output due to its higher input voltage, while the boost compensation module located downstream of the light strip performs large-scale boost compensation due to its lower input voltage, thereby gradually canceling out the voltage attenuation caused by line transmission. Through this method, LED light-emitting units at different positions along the entire light strip can obtain essentially consistent operating conditions, resulting in a uniform and stable light emission state in the final display effect.

[0038] This invention does not simply add a boost element to the light strip, but rather constructs a localized voltage compensation system distributed along the length of the flexible circuit board and cooperating with the corresponding LED light-emitting units. This system detects and corrects the unavoidable voltage drop during long-distance power supply point by point, effectively improving the uneven brightness problem caused by voltage attenuation in traditional long light strips. Furthermore, it eliminates the need for complex intermediate power supply wiring and does not compromise the original flexibility, thinness, and ease of installation of the LED flexible light strip. Therefore, this invention is applicable to various product forms, including monochrome lighting strips, RGB light strips, decorative light strips, and engineering linear lighting strips, demonstrating excellent versatility and practical application value.

[0039] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An LED flexible light strip with distributed voltage compensation function, characterized in that, It includes a flexible circuit board, a plurality of LED light-emitting units spaced apart along the length of the flexible circuit board, and a main power supply line disposed on the flexible circuit board. It also includes multiple boost compensation modules, which are surface-mounted on the flexible circuit board and electrically connected to the corresponding LED light-emitting units. The input terminal of each boost compensation module is connected to the main power line to obtain the input voltage at its location. The output terminal of each boost compensation module is connected to the corresponding LED light-emitting unit to boost the obtained input voltage to the output voltage or output current that meets the driving requirements of the corresponding LED light-emitting unit, so as to locally compensate for the line voltage drop generated during the transmission of the main power line, thereby ensuring that the LED light-emitting units at different positions of the LED flexible light strip maintain a consistent luminous brightness.

2. The LED flexible light strip according to claim 1, characterized in that, The plurality of boost compensation modules are configured one-to-one with the plurality of LED light-emitting units, and the output terminal of each boost compensation module is connected to the input terminal of the corresponding single LED light-emitting unit.

3. The LED flexible light strip according to claim 1, characterized in that, The plurality of boost compensation modules are arranged in groups corresponding to the plurality of LED light-emitting units. The output terminal of each boost compensation module is connected to the input terminal of a group of LED light-emitting units for centralized compensation driving of the group of LED light-emitting units.

4. The LED flexible light strip according to claim 1, characterized in that, The boost compensation module is an integrated surface mount device that integrates a boost control circuit, as well as energy storage components, filtering components, and feedback adjustment components that cooperate with the boost control circuit.

5. The LED flexible light strip according to claim 4, characterized in that, The boost compensation module integrates a switching regulator control chip, a power inductor, an input filter capacitor, an output filter capacitor, and a feedback resistor network.

6. The LED flexible light strip according to claim 1, characterized in that, The boost compensation module is a constant output voltage type boost compensation module, which is used to provide a preset output voltage to the corresponding LED light-emitting unit.

7. The LED flexible light strip according to claim 1, characterized in that, The boost compensation module is a constant output current type boost compensation module, which is used to provide a preset driving current to the corresponding LED light-emitting unit.

8. The LED flexible light strip according to claim 1, characterized in that, The main power supply line extends along the flexible circuit board, and the input terminals of the multiple boost compensation modules are connected in parallel to the main power supply line to form a parallel compensation network distributed along the flexible circuit board.

9. A voltage compensation method for the LED flexible light strip according to any one of claims 1 to 8, characterized in that, Includes the following steps: The main power supply line supplies power to the LED flexible light strip; Multiple boost compensation modules located at different positions on the flexible circuit board detect the actual input voltage at their respective input terminals. Each of the aforementioned boost compensation modules performs boost compensation on the driving voltage or driving current of the corresponding LED light-emitting unit based on the detected actual input voltage; The boost compensation module located downstream of the LED flexible light strip performs a higher degree of compensation than the boost compensation module located upstream, in order to compensate for the voltage attenuation caused by line transmission, so that the LED light-emitting units at different positions of the LED flexible light strip can obtain basically consistent luminous brightness.

10. The voltage compensation method according to claim 9, characterized in that, The boost compensation module located upstream of the LED flexible light strip performs small boost compensation or direct output when its input voltage reaches the set condition, and the boost compensation module located downstream of the LED flexible light strip performs large boost compensation when its input voltage is lower than the set condition.

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