An ultra-long cascaded IP COB uniform light strip
Patent Information
- Application Number
- CN202522214482.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-10-20
AI Technical Summary
[0002]在现有的灯带技术中，普通灯带在长度增加时，往往会出现亮度不均、电流不稳定等问题
[0013]本实用新型与现有技术相比具有明显的优点和有益效果，具体而言，由上述技术方案可知，COB 柔性灯板贴覆于硅胶上，硅胶能为灯板提供良好的防护，其绝缘性可避免电路短路，防水性可防止水分侵入损坏内部元件，有效延长了灯带的使用寿命。导线与 COB柔性灯板电性连接，确保了稳定的电力传输。在柔性 FPC 板上，多个发光芯片间隔分布，多个恒流 IC 穿插其中且级联连接形成分布式驱动网络，能为超长灯带上不同段落的发光芯片提供独立且稳定的驱动电流，解决了传统灯带因长度增加而出现的亮度不均问题，实现了均匀发光，提高了照明质量。同时，分布式驱动网络增强了灯带的可靠性，若单个恒流 IC出现故障，不会影响其他部分的正常工作。而且，这种布局有利于散热，避免局部温度过高影响性能，进一步保障了灯带的稳定运行。
Smart Images
Figure CN224886895U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of light strip technology, and in particular to an ultra-long cascaded IP COB uniform light strip. Background Technology
[0002] In existing LED strip technology, ordinary LED strips often experience uneven brightness and unstable current as their length increases. Traditional driving methods struggle to meet the stable driving current requirements of the LED chips in different sections of ultra-long LED strips, easily leading to inconsistent luminous effects at different locations and affecting overall lighting quality. Furthermore, the structural design of some LED strips makes assembly and connection inconvenient, increasing production and installation costs. Therefore, there is an urgent need to develop an ultra-long cascaded IP COB uniform light strip to meet practical application needs. Utility Model Content
[0003] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide an ultra-long cascaded IP COB uniform light strip, which forms a distributed driving network through multiple constant current ICs cascaded together, providing independent and stable driving currents for the light-emitting chips in different sections of the ultra-long light strip, thereby achieving uniform light emission; and the structural design facilitates assembly and connection.
[0004] To achieve the above objectives, this utility model adopts the following technical solution: an ultra-long cascaded IP COB uniform light strip, comprising a COB flexible light board, silicone, and wires. The COB flexible light board is attached to the silicone, and the wires are electrically connected to the COB flexible light board. The COB flexible light board includes a flexible FPC board, multiple light-emitting chips, and multiple constant current ICs. The multiple light-emitting chips and multiple constant current ICs are all mounted on the flexible FPC board. The multiple light-emitting chips are spaced apart on the flexible FPC board, and the multiple constant current ICs are interspersed among the multiple light-emitting chips. The multiple constant current ICs are cascaded to form a distributed driving network, providing independent and stable driving current for the light-emitting chips in different segments of the ultra-long light strip.
[0005] As a preferred embodiment, the constant current IC is a linear drive IC that integrates an error amplifier, a reference voltage source, and a power transistor, and maintains a constant output current through a feedback loop.
[0006] As a preferred embodiment: a current sensing resistor is connected in series in the current output circuit of the constant current IC, and the voltage across the current sensing resistor is fed back to the error amplifier inside the IC to form a closed-loop control.
[0007] The feedback loop compares the voltage across the current sensing resistor with a stable internal reference voltage and adjusts the conduction state of the power transistor through an error amplifier to achieve constant current output.
[0008] As a preferred embodiment, the circuit architecture of the constant current IC does not require external magnetic components, and the current flowing through the light-emitting chip is controlled by linear adjustment.
[0009] As a preferred embodiment, the constant current IC integrates a temperature sensing unit, a threshold comparison unit, and a logic control unit. When the temperature of the constant current IC detected by the temperature sensing unit exceeds the preset value of the threshold comparison unit, the logic control unit outputs a signal to reduce or shut off the output current, thereby realizing the over-temperature protection function of the constant current IC.
[0010] As a preferred embodiment: the light-emitting chip is an LED chip, the flexible FPC board and the silicone are both strip-shaped, the end of the flexible FPC board is provided with a first connecting part and a second connecting part for connection with the guide, the wire has a first terminal and a second terminal, the first terminal corresponds to the first connecting part, and the second terminal corresponds to the second connecting part.
[0011] As a preferred embodiment: the flexible FPC board has a first adhesive patch and a second adhesive patch for connecting silicone on both sides, and the silicone is connected to the flexible FPC board through the first adhesive patch and the second adhesive patch.
[0012] As a preferred embodiment: there are multiple first adhesive patches and multiple second adhesive patches, the first adhesive patches and the second adhesive patches are distributed in parallel, the multiple first adhesive patches are evenly spaced, and the multiple second adhesive patches correspond one-to-one with the multiple first adhesive patches.
[0013] Compared with existing technologies, this invention has significant advantages and beneficial effects. Specifically, as shown in the above technical solution, the COB flexible light board is attached to silicone, which provides excellent protection for the light board. Its insulation prevents short circuits, and its waterproofness prevents moisture from damaging internal components, effectively extending the lifespan of the light strip. The wires are electrically connected to the COB flexible light board, ensuring stable power transmission. On the flexible FPC board, multiple light-emitting chips are spaced apart, and multiple constant current ICs are interspersed and cascaded to form a distributed driving network. This network provides independent and stable driving current to the light-emitting chips in different sections of the ultra-long light strip, solving the problem of uneven brightness caused by the increased length of traditional light strips, achieving uniform light emission and improving lighting quality. Simultaneously, the distributed driving network enhances the reliability of the light strip; if a single constant current IC fails, it will not affect the normal operation of other parts. Moreover, this layout facilitates heat dissipation, preventing excessively high local temperatures from affecting performance, further ensuring the stable operation of the light strip.
[0014] To more clearly illustrate the structural features and effects of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description
[0015] Figure 1 is a three-dimensional structural diagram of an ultra-long cascaded IP COB uniform light strip according to this utility model;
[0016] Figure 2 is an enlarged view of point M in Figure 1 of this utility model;
[0017] Figure 3 is an exploded view of the three-dimensional structure of an ultra-long cascaded IP COB uniform light strip of this utility model.
[0018] Figure 4 is an enlarged view of point N in Figure 3 of this utility model;
[0019] Figure 5 is an internal diagram illustrating the constant current drive circuit IC architecture of this utility model.
[0020] Figure 6 is a schematic diagram of the LED strip circuit of this utility model.
[0021] Explanation of reference numerals in the attached diagram:
[0022] In the figure: 10, COB flexible light board; 11, flexible FPC board; 111, first connecting part; 112, second connecting part; 12, light-emitting chip; 13, constant current IC; 20, silicone; 30, wire; 31, first terminal; 32, second terminal; 41, first adhesive; 42, second adhesive. Detailed Implementation
[0023] As shown in Figures 1 to 6, this utility model discloses an ultra-long cascaded IP COB uniform light strip, comprising a COB flexible light board 10, silicone 20, and wires 30. The COB flexible light board 10 is attached to the silicone 20, and the wires 30 are electrically connected to the COB flexible light board 10. The COB flexible light board 10 includes a flexible FPC board 11, multiple light-emitting chips 12, and multiple constant current ICs 13. All light-emitting chips 12 and constant current ICs 13 are mounted on the flexible FPC board 11. The multiple light-emitting chips 12 are spaced apart on the flexible FPC board 11, and the multiple constant current ICs 13 are interspersed among the multiple light-emitting chips 12. The multiple constant current ICs 13 are cascaded to form a distributed driving network, providing independent and stable driving current to the light-emitting chips 12 in different segments of the ultra-long light strip.
[0024] A COB flexible light panel is attached to silicone 20, which provides excellent protection for the light panel. Its insulation prevents short circuits, and its waterproofing prevents moisture from damaging internal components, effectively extending the lifespan of the light strip. Wires 30 are electrically connected to the COB flexible light panel, ensuring stable power transmission. On the flexible FPC board, multiple light-emitting chips 12 are spaced apart, and multiple constant current ICs are interspersed and cascaded to form a distributed driving network. This network provides independent and stable driving current to the light-emitting chips 12 in different sections of the ultra-long light strip, solving the problem of uneven brightness that occurs in traditional light strips due to increased length, achieving uniform light emission and improving lighting quality. Simultaneously, the distributed driving network enhances the reliability of the light strip; if a single constant current IC fails, it will not affect the normal operation of other parts. Moreover, this layout facilitates heat dissipation, preventing excessively high local temperatures from affecting performance, further ensuring the stable operation of the light strip.
[0025] The constant current IC13 is a linear driver IC that integrates an error amplifier, a reference voltage source, and a power transistor. It maintains a constant output current through a feedback loop. This allows the LED chip 12 to operate in a stable current environment, avoiding problems such as brightness flickering and color deviation caused by current fluctuations, extending the lifespan of the LED chip, and ensuring the consistency and stability of the light strip's illumination.
[0026] The constant current IC13 incorporates a current-sensing resistor in series in its current output circuit. The voltage across this resistor is fed back to the internal error amplifier, forming a closed-loop control. This feedback loop compares the voltage across the current-sensing resistor with a stable internal reference voltage and adjusts the power transistor's conduction state via the error amplifier to achieve constant current output. This precise control method allows for real-time monitoring and adjustment of the current, ensuring a high-precision and constant output current, further improving the uniformity and stability of the LED strip's illumination.
[0027] The constant current IC13's circuit architecture requires no external magnetic components, controlling the current flowing through the light-emitting chip 12 through linear adjustment. This simplifies circuit design, reduces component count, lowers production costs and product size, and also reduces electromagnetic interference caused by magnetic components, improving the LED strip's electromagnetic compatibility.
[0028] The constant current IC13 integrates a temperature sensing unit, a threshold comparison unit, and a logic control unit.
[0029] When the temperature of the constant current IC13 detected by the temperature sensing unit exceeds the preset value of the threshold comparison unit, the logic control unit outputs a signal to reduce or shut off the output current, thereby realizing the over-temperature protection function of the constant current IC13. This effectively prevents the constant current IC from being damaged due to overheating, improves the reliability and stability of the LED strip in high-temperature environments, and extends the product's service life.
[0030] The light-emitting chip 12 is an LED chip. Both the flexible FPC board 11 and the silicone 20 are elongated strips. The flexible FPC board 11 has a first connecting portion 111 and a second connecting portion 112 at its end for connection with a guide. The conductor 30 has a first terminal 31 and a second terminal 32. The first terminal 31 corresponds to the first connecting portion 111, and the second terminal 32 corresponds to the second connecting portion 112. The flexible FPC board has a first connecting portion 111 and a second connecting portion 112 at its end, and the first terminal 31 and second terminal 32 of the conductor 30 correspond to these. This design makes the connection between the conductor 30 and the flexible FPC board more convenient and accurate, reduces assembly difficulty and the probability of errors, improves production efficiency, and facilitates later maintenance and replacement.
[0031] The flexible FPC board 11 has a first adhesive patch 41 and a second adhesive patch 42 for connecting silicone 20 on both sides. The silicone 20 is connected to the flexible FPC board 11 through the first adhesive patch 41 and the second adhesive patch 42.
[0032] There are multiple first adhesive patches 41 and second adhesive patches 42, which are distributed in parallel. The multiple first adhesive patches 41 are evenly spaced, and the multiple second adhesive patches 42 correspond one-to-one with the multiple first adhesive patches 41. The flexible FPC board is connected to the silicone 20 on both sides through the multiple first adhesive patches 41 and second adhesive patches 42, and the adhesive patches are parallel, evenly spaced, and correspond one-to-one. This connection method ensures the firmness and stability of the connection between the silicone 20 and the flexible FPC board, while also adapting to a certain degree of bending and deformation, enhancing the flexibility and durability of the light strip.
[0033] Uniform light emission: Multiple constant current ICs are cascaded to form a distributed driving network, which can provide independent and stable driving current for the light-emitting chips 12 in different sections of the ultra-long light strip. This effectively solves the problem of uneven brightness in traditional light strips as the length increases, realizes uniform light emission of ultra-long light strips, and improves lighting quality.
[0034] Constant current output: The constant current IC adopts a linear drive method and integrates an error amplifier, a reference voltage source and a power transistor. It forms a closed-loop control through a feedback loop and a current sensing resistor, which can accurately maintain a constant output current, ensuring that the light-emitting chip 12 works in a stable current environment and extending the service life of the light-emitting chip 12.
[0035] Over-temperature protection: The constant current IC integrates a temperature sensing unit, a threshold comparison unit, and a logic control unit. When the temperature exceeds the preset value, it can reduce or shut off the output current in time to prevent the constant current IC from being damaged due to overheating, thus improving the stability and reliability of the LED strip.
[0036] The structure is simple and easy to assemble: the flexible FPC board and silicone 20 are connected by multiple first adhesive patches 41 and second adhesive patches 42, and the connection method is simple and firm; the first connecting part 111 and the second connecting part 112 at the end of the flexible FPC board are connected to the first terminal 31 and the second terminal 32 of the wire 30, which is convenient and quick, and reduces production and installation costs.
[0037] The distributed drive network, composed of multiple cascaded constant current ICs, along with the constant current output and over-temperature protection functions of the constant current ICs, ensures stable power supply to the light-emitting chips 12 in different segments of the ultra-long LED strip, achieving uniform light emission. The closed-loop control of the constant current ICs guarantees a constant output current, and the over-temperature protection function improves the stability and reliability of the LED strip. Meanwhile, the connection method between the flexible FPC board and the silicone 20, as well as the connection design between the wires 30 and the flexible FPC board, makes the LED strip assembly and maintenance more convenient and reduces costs. This gives this ultra-long cascaded IP COB uniform light strip significant advantages in both performance and ease of use.
[0038] The usage and principle of this ultra-long cascaded IP COB uniform light strip are as follows: When the light strip is powered on, the current is transmitted to the COB flexible light board through the wires. A distributed drive network composed of multiple cascaded constant current ICs begins to work, providing a stable drive current to the light-emitting chips in different sections. Inside the constant current IC, a current sensing resistor senses the output current and feeds the voltage across its terminals back to an error amplifier. The error amplifier compares this voltage with a stable internal reference voltage provided by a reference voltage source, and then adjusts the conduction state of the power transistors to maintain a constant output current. During the operation of the light strip, a temperature sensing unit monitors the temperature of the constant current IC in real time. When the detected temperature exceeds the preset value of the threshold comparison unit, the logic control unit outputs a signal to reduce or shut off the output current, protecting the constant current IC from overheating damage. In use, the light strip can be installed in the desired location according to actual needs, and lighting can be achieved by connecting it to the power supply through wires.
[0039] The key design features of this invention are: a COB flexible light board is attached to silicone, which provides excellent protection for the light board. The silicone's insulation prevents short circuits, and its waterproofing prevents moisture from damaging internal components, effectively extending the lifespan of the light strip. Electrical connections between the wires and the COB flexible light board ensure stable power transmission. Multiple light-emitting chips are spaced apart on the flexible FPC board, with multiple constant current ICs interspersed and cascaded to form a distributed driving network. This network provides independent and stable driving current to the light-emitting chips in different sections of the ultra-long light strip, solving the problem of uneven brightness that occurs with the increased length of traditional light strips, achieving uniform light emission and improving lighting quality. Simultaneously, the distributed driving network enhances the reliability of the light strip; if a single constant current IC fails, it will not affect the normal operation of other parts. Furthermore, this layout facilitates heat dissipation, preventing excessively high local temperatures from affecting performance and further ensuring the stable operation of the light strip.
[0040] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.
Claims
1. A super-long cascaded IP COB uniform light strip, characterized in that: The device includes a COB flexible light panel, silicone, and wires. The COB flexible light panel is attached to the silicone, and the wires are electrically connected to the COB flexible light panel. The COB flexible light panel includes a flexible FPC board, multiple light-emitting chips, and multiple constant current ICs. The multiple light-emitting chips and the multiple constant current ICs are all mounted on the flexible FPC board. The multiple light-emitting chips are distributed at intervals on the flexible FPC board, and the multiple constant current ICs are interspersed among the multiple light-emitting chips. The multiple constant current ICs are cascaded to form a distributed driving network, providing independent and stable driving current to the light-emitting chips in different segments of the ultra-long light strip.
2. The ultra-long cascaded IP COB uniform light strip according to claim 1, characterized in that: The constant current IC is a linear drive IC. It integrates an error amplifier, a reference voltage source, and a power transistor, and maintains a constant output current through a feedback loop.
3. The ultra-long cascaded IP COB uniform light strip according to claim 2, characterized in that: The constant current IC has a current sensing resistor connected in series in its current output circuit. The voltage across the current sensing resistor is fed back to the error amplifier inside the IC to form a closed-loop control. The feedback circuit compares the voltage across the current sensing resistor with a stable internal reference voltage and adjusts the conduction state of the power transistor through the error amplifier to achieve constant current output.
4. The ultra-long cascaded IP COB uniform light strip according to claim 1, characterized in that: The constant current IC's circuit architecture requires no external magnetic components, and controls the current flowing through the light-emitting chip through linear adjustment.
5. The ultra-long cascaded IP COB uniform light strip according to claim 1, characterized in that: The constant current IC integrates a temperature sensing unit, a threshold comparison unit, and a logic control unit. When the temperature of the constant current IC detected by the temperature sensing unit exceeds the preset value of the threshold comparison unit, the logic control unit outputs a signal to reduce or shut off the output current, thereby realizing the over-temperature protection function of the constant current IC.
6. The ultra-long cascaded IP COB uniform light strip according to claim 1, characterized in that: The light-emitting chip is an LED chip. The flexible FPC board and silicone are both strip-shaped. The end of the flexible FPC board is provided with a first connecting part and a second connecting part for connecting with the guide. The wire has a first terminal and a second terminal. The first terminal corresponds to the first connecting part, and the second terminal corresponds to the second connecting part.
7. The ultra-long cascaded IP COB uniform light strip according to claim 1, characterized in that: The flexible FPC board has a first adhesive sticker and a second adhesive sticker for connecting silicone on both sides. The silicone is connected to the flexible FPC board through the first adhesive sticker and the second adhesive sticker.
8. The ultra-long cascaded IP COB uniform light strip according to claim 7, characterized in that: There are multiple first adhesive stickers and multiple second adhesive stickers. The first adhesive stickers and the second adhesive stickers are distributed in parallel. The multiple first adhesive stickers are evenly spaced apart. The multiple second adhesive stickers correspond one-to-one with the multiple first adhesive stickers.