A T-shaped LED lamp tube and implementation method thereof

Abstract

The present invention discloses a T-shaped LED lamp tube, including a base, characterized in that: a heat dissipation strip is provided above the base, a light source substrate is provided above the heat dissipation strip, a two-color LED lamp bead is provided on the light source substrate, reflective paper is provided on both sides of the light source substrate above the heat dissipation strip, a first driving module is provided above the heat dissipation strip at one end of the light source substrate, and a second driving module is provided above the heat dissipation strip at the other end of the light source substrate; the present invention also discloses a method for realizing the T-shaped LED lamp tube. The present invention can be compatible with the application of HF ballast by providing a first filament circuit, a second filament circuit and a step-down DC isolation circuit. At the same time, the design of the DC isolation circuit can enable the product to meet the requirements of the DC component of the UL standard, and the innovative introduction of thermistor design in the filament circuit can ensure that the product does not fail when it is connected to the mains by mistake, and has recoverability, thereby ensuring safety and reliability.

Description

Technical Field

[0001] The invention belongs to the technical field of LED lamps, and in particular relates to a T-shaped LED lamp tube and a realization method thereof. Background Art

[0002] In recent years, with the continuous improvement of living standards, people's demand for quality of life is also increasing. Just as people's demand for lighting products is no longer just satisfied with simple switch control and ordinary lighting functions, but they hope that it can meet people's wireless intelligent control in different scenarios, so as to achieve light color changes and other needs.

[0003] However, for places with traditional fluorescent lamps, conventional smart control lighting products are often not compatible with electronic ballasts. Improper use will cause product failure and damage, or even cause safety risks such as smoke and fire. If all new smart lamps need to be replaced through transformation, it will not only be very troublesome and complicated to operate, but also expensive and wasteful of resources.

[0004] Currently, there are no similar smart straight tube lamps on the market that can directly replace fluorescent lamps and adjust the brightness and color at the same time. Summary of the invention

[0005] The purpose of the present invention is to provide a T-shaped LED lamp tube to solve the problems raised in the above background technology. The T-shaped LED lamp tube provided by the present invention has the characteristics of being able to replace traditional T-shaped fluorescent lamps as a lighting source without the need to modify lamps and can realize intelligent control of light color changes.

[0006] Another object of the present invention is to provide a method for realizing a T-shaped LED lamp tube.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a T-shaped LED lamp tube, comprising a base, characterized in that: a heat dissipation strip is provided above the base, a light source substrate is provided above the heat dissipation strip, a two-color LED lamp bead is provided on the light source substrate, reflective paper is provided on both sides of the light source substrate above the heat dissipation strip, a first driving module is provided above the heat dissipation strip at one end of the light source substrate, a second driving module is provided above the heat dissipation strip at the other end of the light source substrate, the first driving module is electrically connected to the second driving module, the second driving module is electrically connected to the light source substrate, lamp holders are respectively provided at both ends of the base, a PC cover is provided above the base, and the base and the PC cover are an integrated structure.

[0008] Further in the present invention, the first driving module includes a first filament circuit, a buck DC isolation circuit and a second filament circuit, and the second driving module includes a power supply circuit, a current sampling circuit, a Hall reset circuit, an intelligent control module, a PWM dual-channel color adjustment circuit, a PWM dimming circuit, a voltage sampling circuit and a rectifier voltage stabilization circuit, wherein the first filament circuit is connected to the input terminal PIN1 and the input terminal PIN2 respectively, the second filament circuit is connected to the input terminal PIN3 and the input terminal PIN4, the first filament circuit is also connected to the buck DC isolation circuit, the second filament circuit is connected to the buck DC isolation circuit and the input terminal of the rectifier voltage stabilization circuit respectively, and the buck DC isolation circuit is connected to the input terminal of the rectifier voltage stabilization circuit;

[0009] Further in the present invention, the output end of the rectifier and voltage-stabilizing circuit includes a Bus end and a GND end, wherein the Bus end is respectively connected to the PWM dimming circuit, the PWM dual-channel color adjustment circuit, the power supply circuit and the voltage sampling circuit, and the GND end is respectively connected to the PWM dimming circuit, the PWM dual-channel color adjustment circuit, the power supply circuit, the current sampling circuit, the voltage sampling circuit and the Hall reset circuit, the PWM dimming circuit is respectively connected to the BUS end, the GND end and the intelligent control module, the PWM dual-channel color adjustment circuit is respectively connected to the BUS end, the GND end and the intelligent control module, the power supply circuit is respectively connected to the BUS end and the GND end, the current sampling circuit is respectively connected to the GND end and the intelligent control module, the voltage sampling circuit is respectively connected to the BUS end, the GND end and the intelligent control module, and the Hall reset circuit is respectively connected to the GND end and the intelligent control module.

[0010] Further in the present invention, the first filament circuit includes a temperature fuse F1, a temperature fuse F2, a thermistor RT1 and a capacitor CS1, and the second filament circuit includes a temperature fuse F3, a temperature fuse F4, a thermistor RT2 and a capacitor CS2, wherein the input end of the temperature fuse F1 is connected to the input end PIN1, the input end of the temperature fuse F2 is connected to the input end PIN2, the input end of the temperature fuse F3 is connected to the input end PIN3, the input end of the temperature fuse F4 is connected to the input end PIN4, the output end of the temperature fuse F1 is respectively connected to the thermistor RT1 and the capacitor CS1, the output end of the temperature fuse F2 is respectively connected to the thermistor RT1, the capacitor CS1 and the step-down DC isolation circuit, the output end of the temperature fuse F3 is respectively connected to the thermistor RT2, the capacitor CS2 and the step-down DC isolation circuit, and the output end of the temperature fuse F4 is respectively connected to the thermistor RT2 and the capacitor CS2;

[0011] Further in the present invention, the step-down DC isolation circuit includes a safety capacitor CX1 and a safety capacitor CX2, wherein the safety capacitor CX1 is respectively connected to the safety capacitor CX2, the first filament circuit, the second filament circuit and the rectifier and voltage stabilization circuit, and the safety capacitor CX2 is respectively connected to the safety capacitor CX1, the first filament circuit and the rectifier and voltage stabilization circuit.

[0012] Further in the present invention, the rectifier and voltage-stabilizing circuit includes a diode DS1, a diode DS2, a diode DS3, a diode DS4 and an electrolytic capacitor CE1, wherein the diode DS1, the diode DS2, the diode DS3 and the diode DS4 are connected end to end in sequence to form a bridge rectifier module, the input end of the bridge rectifier module is respectively connected to the second filament circuit and the step-down DC isolation circuit, the positive pole of the output end of the bridge rectifier module is the BUS end, which is respectively connected to the positive pole of the electrolytic capacitor CE1, the PWM dimming circuit, the PWM dual-channel color adjustment circuit, the power supply circuit and the voltage sampling circuit, the negative pole of the output end of the bridge rectifier module is the GND end, which is respectively connected to the negative pole of the electrolytic capacitor CE1, the PWM dimming circuit, the PWM dual-channel color adjustment circuit, the power supply circuit, the current sampling circuit, the voltage sampling circuit, the Hall reset circuit and the intelligent control module.

[0013] Further in the present invention, the PWM dimming circuit includes a chip U1, wherein pin 1 of the chip U1 is connected to the GND terminal, pin 2 of the chip U1 is respectively connected to capacitor CS4, resistor RS2 and the intelligent control module, the other ends of capacitor CS4 and resistor RS2 are connected to the GND terminal, pin 3 of the chip U1 is connected to resistor RS1, the other end of resistor RS1 is connected to the GND terminal, pin 4 of the chip U1 is respectively connected to resistor RS3 and capacitor CS3, the other end of resistor RS3 is connected to the BUS terminal, the other end of capacitor CS3 is connected to the GND terminal, and pin 5 of the chip U1 is connected to M The G pole of the MOS tube Q1 is connected, the 6th pin of the chip U1 is respectively connected to the resistor RS4, the resistor RS5 and the current sampling circuit, the other ends of the resistor RS4 and the resistor RS5 are connected to the GND terminal, the 7th pin of the chip U1 is connected to the S pole of the MOS tube Q1, the D pole of the MOS tube Q1 is respectively connected to the positive pole of the diode DS5 and one end of the inductor T1, the other end of the inductor T1 is respectively connected to the negative pole of the electrolytic capacitor CE2, the resistor RS6 and the PWM dual-channel color adjustment circuit, the negative pole of the diode DS5, the positive pole of the electrolytic capacitor CE2 and the resistor RS6 are respectively connected to the BUS terminal;

[0014] Further in the present invention, the PWM dual-channel color adjustment circuit includes a chip U3, pin 1 of the chip U3 is respectively connected to the resistor RS8 and the capacitor CS5, pin 2 of the chip U3 is respectively connected to the other end of the capacitor CS5 and the PWM dimming circuit, the other end of the resistor RS8 is connected to the BUS end, pin 3 of the chip U3 is connected to the negative electrode of one of the LED light sources, pin 4 of the chip U3 is connected to the negative electrode of the other LED light source, pin 6 of the chip U3 is respectively connected to one end of the capacitor CS7 and the intelligent control module, the other end of the capacitor CS7 is connected to the GND end, pin 7 of the chip U3 is respectively connected to the negative electrode of the diode DS6, one end of the capacitor CS6 and the negative electrode of the Zener diode Z3, the positive electrode of the Zener diode Z3 is connected to the other end of the capacitor CS6 and the GND end, the positive electrode of the diode DS6 is connected to one end of the resistor RS7, the other end of the resistor RS7 is connected to the BUS end, and pin 8 of the chip U3 is connected to the GND end.

[0015] Further in the present invention, the power supply circuit includes a resistor RS9, a resistor RS10, a resistor RS11, a capacitor CS8, an electrolytic capacitor CE3, an inductor L1, a diode DS7 and a chip U2, wherein pin 1 of the chip U2 is connected to one end of the capacitor CS8, and the other end of the capacitor CS8 is connected to the GND end, pin 2 of the chip U2 is respectively connected to the resistor RS9 and the resistor RS10, the other end of the resistor RS9 is connected to the GND end, the other end of the resistor RS10 is respectively connected to the inductor L1, the positive electrode of the electrolytic capacitor CE3, the resistor RS11, the current sampling circuit, the Hall reset circuit and the intelligent control module, pin 4 of the chip U2 is connected to the BUS end, pins 5, 6, 7 and 8 of the chip U2 are respectively connected to the GND end, and are connected to the other end of the inductor L1 and the negative electrode of the diode DS7, and the positive electrode of the diode DS7 is respectively connected to the negative electrode of the electrolytic capacitor CE3, the resistor RS11 and the GND end.

[0016] Further in the present invention, the current sampling circuit includes a resistor RS12, a resistor RS13, a resistor RS14, a capacitor CS9 and a chip U4, wherein pin 1 of the chip U4 is respectively connected to the resistor RS12 and the intelligent control module, the other end of the resistor RS12 is respectively connected to pin 4 of the chip U4 and the resistor RS13, pin 2 of the chip U4 is respectively connected to the other end of the resistor RS13 and the GND end, pin 3 of the chip U4 is respectively connected to the resistor RS14 and the capacitor CS9, the other end of the resistor RS14 is connected to the PWM dimming circuit, the other end of the capacitor CS9 is connected to the GND end, and pin 5 of the chip U4 is respectively connected to the power supply circuit and the Hall reset circuit;

[0017] Further in the present invention, the voltage sampling circuit includes a resistor RS15, a resistor RS16, a resistor RS17, a capacitor CS10 and a voltage zener diode Z1, wherein one end of the resistor RS16 is respectively connected to the capacitor CS10 and the intelligent control module, the other end of the resistor RS16 is respectively connected to the resistor RS17, the resistor RS15 and the negative electrode of the voltage zener diode Z1, the positive electrode of the voltage zener diode Z1, the other end of RS17 and the other end of CS10 are respectively connected to the GND end, and the other end of the resistor RS15 is connected to the BUS end.

[0018] Further in the present invention, the Hall reset circuit includes a resistor RS18, a resistor RS19, a capacitor CS11, a capacitor CS12, a voltage-stabilizing diode Z2 and a chip U5, wherein pin 1 of the chip U5 is respectively connected to the negative electrode of the resistor RS18, the resistor RS19, the capacitor CS11 and the voltage-stabilizing diode Z2, pin 2 of the chip U5 is connected to the GND end, pin 3 of the chip U5 is respectively connected to the other end of the resistor RS19, the capacitor CS12 and the intelligent control module, the positive electrode of the voltage-stabilizing diode Z2, the other end of the capacitor CS11 and the other end of the capacitor CS12 are respectively connected to the GND end, and the other end of the resistor RS18 is respectively connected to the power supply circuit and the current sampling circuit.

[0019] Further in the present invention, the intelligent control module includes 11 PIN pins, among which PIN5 pin is connected to the current sampling circuit, PIN6 pin is connected to the voltage sampling circuit, PIN7 pin is connected to the GND terminal, PIN8 pin is respectively connected to the power supply circuit, the current sampling circuit and the Hall reset circuit, PIN9 pin is connected to the PWM dimming circuit, PIN10 pin is connected to the PWM dual-channel color adjustment circuit, and PIN11 pin is connected to the Hall reset circuit.

[0020] In the present invention, the method for realizing the T-shaped LED lamp tube further comprises the following steps:

[0021] (1) Mounting the dual-color LED lamp beads on the light source substrate to form a light source assembly;

[0022] (2) Fix the light source assembly on the heat dissipation strip;

[0023] (3) Clip the reflective paper on both sides of the heat dissipation strip on the light source substrate and pass it through the inside of the base;

[0024] (iv) fixing the first driving module and the second driving module respectively on the two ends of the heat dissipation strip located on the light source substrate;

[0025] (V) Connecting the first driving module and the second driving module to the light source assembly through the wiring harness terminal;

[0026] (6) Fix the lamp holder and the base with screws to complete the installation.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention is compatible with the application of HF ballast by providing the first filament circuit, the second filament circuit and the step-down DC isolation circuit. At the same time, the design of the DC isolation circuit can enable the product to meet the requirements of the DC component of the UL standard. In addition, the innovative design of thermistor introduced into the filament circuit can ensure that the product does not fail when it is mistakenly connected to the mains, and has recoverability, thereby ensuring safety and reliability.

[0029] 2. The present invention converts the constant current output of the HF ballast into a constant voltage output by setting a rectifier and voltage stabilizing circuit, which can effectively improve the stability of the circuit during dimming;

[0030] 3. The present invention can realize the APP control of product light color change by setting PWM dimming circuit, PWM dual-channel color adjustment circuit and power supply circuit, combined with intelligent control module;

[0031] 4. The present invention can realize the function of real-time monitoring of product power changes by setting a current sampling circuit and a voltage sampling circuit and combining an intelligent control module;

[0032] 5. The present invention sets a Hall reset circuit and utilizes the Hall effect to control the level of the PWM signal. Combined with the intelligent control module, the purpose of controlling the reset of the product can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 For the present invention Figure 1 A schematic diagram of the front view structure of

[0035] Figure 3 It is a schematic diagram of the circuit structure of the present invention;

[0036] Figure 4 is a schematic structural diagram of a first filament circuit of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of the voltage reduction and DC isolation device of the present invention;

[0038] Figure 6 is a schematic structural diagram of a second filament circuit of the present invention;

[0039] Figure 7 It is a structural schematic diagram of the power supply circuit of the present invention;

[0040] Figure 8 It is a structural schematic diagram of the current sampling circuit of the present invention;

[0041] Fig. 9 It is a structural schematic diagram of the Hall reset circuit of the present invention;

[0042] Fig.10 It is a structural schematic diagram of the intelligent control module of the present invention;

[0043] Fig.11 It is a structural schematic diagram of the PWM dual-channel color adjustment circuit of the present invention;

[0044] Fig.12 It is a structural schematic diagram of the PWM dimming circuit of the present invention;

[0045] Fig.13 It is a structural schematic diagram of the voltage sampling circuit of the present invention;

[0046] Fig.14 It is a structural schematic diagram of the rectifying and voltage-stabilizing circuit of the present invention;

[0047] Fig.15 This is a schematic diagram of the circuit structure of the dual-color LED lamp bead of the present invention;

[0048] In the figure: 1. lamp holder; 2. first drive module; 3. base; 4. heat dissipation strip; 5. reflective paper; 6. light source substrate; 7. two-color LED lamp beads; 8. second drive module; 9. PC cover; 10. first filament circuit; 11. step-down DC isolation circuit; 12. second filament circuit; 13. power supply circuit; 14. current sampling circuit; 15. Hall reset circuit; 16. intelligent control module; 17. PWM dual-channel color adjustment circuit; 18. PWM dimming circuit; 19. voltage sampling circuit; 20. rectification and voltage stabilization circuit. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Example

[0051] See also Figure 1-15The present invention provides the following technical solutions: a T-shaped LED lamp tube, comprising a base 3, characterized in that: a heat dissipation strip 4 is provided above the base 3, a light source substrate 6 is provided above the heat dissipation strip 4, a two-color LED lamp bead 7 is provided on the light source substrate 6, reflective paper 5 is provided on both sides of the light source substrate 6 above the heat dissipation strip 4, a first driving module 2 is provided above the heat dissipation strip 4 at one end of the light source substrate 6, a second driving module 8 is provided above the heat dissipation strip 4 at the other end of the light source substrate 6, the first driving module 2 is electrically connected to the second driving module 8, and the second driving module 8 is electrically connected to the light source substrate 6, lamp caps 1 are provided at both ends of the base 3, a PC cover 9 is provided above the base 3, and the base 3 and the PC cover 9 are an integrated structure.

[0052] Further, the first driving module 2 includes a first filament circuit 10, a buck DC isolation circuit 11 and a second filament circuit 12, and the second driving module 8 includes a power supply circuit 13, a current sampling circuit 14, a Hall reset circuit 15, an intelligent control module 16, a PWM dual-channel color adjustment circuit 17, a PWM dimming circuit 18, a voltage sampling circuit 19 and a rectifier and voltage stabilization circuit 20, wherein the first filament circuit 10 is respectively connected to the input terminal PIN1 and the input terminal PIN2, the second filament circuit 12 is connected to the input terminal PIN3 and the input terminal PIN4, the first filament circuit 10 is also connected to the buck DC isolation circuit 11, the second filament circuit 12 is respectively connected to the buck DC isolation circuit 11 and the input terminal of the rectifier and voltage stabilization circuit 20, and the buck DC isolation circuit 11 is connected to the input terminal of the rectifier and voltage stabilization circuit 20;

[0053] Furthermore, the output end of the rectifier and voltage stabilizing circuit 20 includes a Bus end and a GND end, wherein the Bus end is respectively connected to the PWM dimming circuit 18, the PWM dual-channel color adjustment circuit 17, the power supply circuit 13 and the voltage sampling circuit 19, and the GND end is respectively connected to the PWM dimming circuit 18, the PWM dual-channel color adjustment circuit 17, the power supply circuit 13, the current sampling circuit 14, the voltage sampling circuit 19 and the Hall reset circuit 15, the PWM dimming circuit 18 is respectively connected to the BUS end, the GND end and the intelligent control module 16, the PWM dual-channel color adjustment circuit 17 is respectively connected to the BUS end, the GND end and the intelligent control module 16, the power supply circuit 13 is respectively connected to the BUS end and the GND end, the current sampling circuit 14 is respectively connected to the GND end and the intelligent control module 16, the voltage sampling circuit 19 is respectively connected to the BUS end, the GND end and the intelligent control module 16, and the Hall reset circuit 15 is respectively connected to the GND end and the intelligent control module 16.

[0054] Further, the first filament circuit 10 includes a temperature fuse F1, a temperature fuse F2, a thermistor RT1 and a capacitor CS1, and the second filament circuit 12 includes a temperature fuse F3, a temperature fuse F4, a thermistor RT2 and a capacitor CS2, wherein the input end of the temperature fuse F1 is connected to the input end PIN1, the input end of the temperature fuse F2 is connected to the input end PIN2, the input end of the temperature fuse F3 is connected to the input end PIN3, the input end of the temperature fuse F4 is connected to the input end PIN4, the output end of the temperature fuse F1 is respectively connected to the thermistor RT1 and the capacitor CS1, the output end of the temperature fuse F2 is respectively connected to the thermistor RT1, the capacitor CS1 and the step-down DC isolation circuit 11, the output end of the temperature fuse F3 is respectively connected to the thermistor RT2, the capacitor CS2 and the step-down DC isolation circuit 11, and the output end of the temperature fuse F4 is respectively connected to the thermistor RT2 and the capacitor CS2;

[0055] By adopting the above technical solution and setting temperature fuses F1-F4, when arcing occurs in the HF ballast application, the risk of lamp tube burning or even fire caused by arcing can be avoided. By introducing a filament circuit composed of a thermistor and a capacitor, it can be compatible with various types of ballasts such as PS / RS / DIM like a conventional filament circuit, and it can also ensure that the filament circuit does not fail when it is mistakenly connected to the mains and is recoverable.

[0056] Furthermore, the step-down DC isolation circuit 11 includes a safety capacitor CX1 and a safety capacitor CX2, wherein the safety capacitor CX1 is respectively connected to the safety capacitor CX2, the first filament circuit 10, the second filament circuit 12 and the rectifier and voltage-stabilizing circuit 20, and the safety capacitor CX2 is respectively connected to the safety capacitor CX1, the first filament circuit 10 and the rectifier and voltage-stabilizing circuit 20.

[0057] By adopting the above technical solution and setting the safety capacitor CX1, when connecting to the HF ballast, the voltage on the subsequent BUS bus can be effectively reduced, which can not only protect the device but also improve the compatibility of the ballast; by setting the safety capacitor CX2, the DC component in the loop can be prevented from mixing into the power grid and the safety risks caused thereby.

[0058] Furthermore, the rectifier and voltage-stabilizing circuit 20 includes a diode DS1, a diode DS2, a diode DS3, a diode DS4 and an electrolytic capacitor CE1, wherein the diode DS1, the diode DS2, the diode DS3 and the diode DS4 are connected end to end in sequence to form a bridge rectifier module, the input end of the bridge rectifier module is respectively connected to the second filament circuit 12 and the step-down DC isolation circuit 11, the positive electrode of the output end of the bridge rectifier module is the BUS end, which is respectively connected to the positive electrode of the electrolytic capacitor CE1, the PWM dimming circuit 18, the PWM dual-channel color adjustment circuit 17, the power supply circuit 13 and the voltage sampling circuit 19, the negative electrode of the output end of the bridge rectifier module is the GND end, which is respectively connected to the negative electrode of the electrolytic capacitor CE1, the PWM dimming circuit 18, the PWM dual-channel color adjustment circuit 17, the power supply circuit 13, the current sampling circuit 14, the voltage sampling circuit 19, the Hall reset circuit 15 and the intelligent control module 16.

[0059] By adopting the above technical solution, a rectifier and voltage-stabilizing circuit 20 is set to convert the input AC signal into a DC signal. By setting an electrolytic capacitor CE1 after the bridge rectifier module, the constant current signal output by the HF ballast is filtered and stabilized, and approximately converted into a constant voltage signal, which can effectively improve the stability of the circuit during dimming.

[0060] Furthermore, the PWM dimming circuit 18 includes a chip U1, wherein the pin 1 of the chip U1 is connected to the GND terminal, the pin 2 of the chip U1 is respectively connected to the capacitor CS4, the resistor RS2 and the intelligent control module 16, the other ends of the capacitor CS4 and the resistor RS2 are connected to the GND terminal, the pin 3 of the chip U1 is connected to the resistor RS1, the other end of the resistor RS1 is connected to the GND terminal, the pin 4 of the chip U1 is respectively connected to the resistor RS3 and the capacitor CS3, the other end of the resistor RS3 is connected to the BUS terminal, the other end of the capacitor CS3 is connected to the GND terminal, and the pin 5 of the chip U1 is connected to the MOS The G pole of the tube Q1 is connected, the 6th pin of the chip U1 is respectively connected to the resistor RS4, the resistor RS5 and the current sampling circuit 14, the other ends of the resistors RS4 and RS5 are connected to the GND terminal, the 7th pin of the chip U1 is connected to the S pole of the MOS tube Q1, the D pole of the MOS tube Q1 is respectively connected to the positive pole of the diode DS5 and one end of the inductor T1, the other end of the inductor T1 is respectively connected to the negative pole of the electrolytic capacitor CE2, the resistor RS6 and the PWM dual-channel color adjustment circuit 17, the negative pole of the diode DS5, the positive pole of the electrolytic capacitor CE2 and the resistor RS6 are respectively connected to the BUS terminal;

[0061] The PWM dimming circuit 18 preferably uses Shanghai Jingfeng Mingyuan’s patented PWM dimming IC and its peripheral circuits (see patent CN201810139587.2 for details).

[0062] By adopting the above technical solution and setting the PWM dimming circuit 18, the LED average current is adjusted from 0% to 100% according to the PWM duty cycle output by the intelligent control module 16, thereby achieving the purpose of controlling the light and dark changes of the product.

[0063] Further, the PWM dual-channel color adjustment circuit 17 includes a chip U3, wherein pin 1 of the chip U3 is respectively connected to the resistor RS8 and the capacitor CS5, pin 2 of the chip U3 is respectively connected to the other end of the capacitor CS5 and the PWM dimming circuit 18, the other end of the resistor RS8 is connected to the BUS end, pin 3 of the chip U3 is connected to the negative electrode of one of the LED light sources, pin 4 of the chip U3 is connected to the negative electrode of the other LED light source, pin 6 of the chip U3 is respectively connected to one end of the capacitor CS7 and the intelligent control module 16, the other end of the capacitor CS7 is connected to the GND end, pin 7 of the chip U3 is respectively connected to the negative electrode of the diode DS6, one end of the capacitor CS6 and the negative electrode of the Zener diode Z3, the positive electrode of the Zener diode Z3 and the other end of the capacitor CS6 are connected to the GND end, the positive electrode of the diode DS6 is connected to one end of the resistor RS7, the other end of the resistor RS7 is connected to the BUS end, and pin 8 of the chip U3 is connected to the GND end.

[0064] The PWM dual-channel color adjustment circuit 17 preferably uses Shanghai Jingfeng Mingyuan's patented PWM dual-channel color adjustment IC and its peripheral circuits (see patent CN201710879334.4 for details).

[0065] By adopting the above technical solution, a PWM dual-channel color adjustment circuit 17 is set, and the luminous ratio of the two LED light sources is adjusted by adjusting the duty cycle of the PWM signal output by the intelligent control module 16, so as to achieve the purpose of adjusting the color temperature.

[0066] Furthermore, the power supply circuit 13 includes a resistor RS9, a resistor RS10, a resistor RS11, a capacitor CS8, an electrolytic capacitor CE3, an inductor L1, a diode DS7 and a chip U2, wherein pin 1 of the chip U2 is connected to one end of the capacitor CS8, and the other end of the capacitor CS8 is connected to the GND end, pin 2 of the chip U2 is respectively connected to the resistor RS9 and the resistor RS10, the other end of the resistor RS9 is connected to the GND end, the other end of the resistor RS10 is respectively connected to the inductor L1, the positive electrode of the electrolytic capacitor CE3, the resistor RS11, the current sampling circuit 14, the Hall reset circuit 15 and the intelligent control module 16, pin 4 of the chip U2 is connected to the BUS end, pins 5, 6, 7 and 8 of the chip U2 are respectively connected to the GND end, and are connected to the other end of the inductor L1 and the negative electrode of the diode DS7, and the positive electrode of the diode DS7 is respectively connected to the negative electrode of the electrolytic capacitor CE3, the resistor RS11 and the GND end.

[0067] The power supply circuit 13 preferably comprises a power supply IC and its peripheral circuits manufactured by Shenzhen BiYi.

[0068] By adopting the above technical solution, a power supply circuit 13 is provided to provide a voltage to the intelligent control module 16, the current sampling circuit 14 and the Hall reset circuit 15 so that the entire circuit can work normally.

[0069] Further, the current sampling circuit 14 includes a resistor RS12, a resistor RS13, a resistor RS14, a capacitor CS9 and a chip U4, wherein pin 1 of the chip U4 is respectively connected to the resistor RS12 and the intelligent control module 16, the other end of the resistor RS12 is respectively connected to pin 4 of the chip U4 and the resistor RS13, pin 2 of the chip U4 is respectively connected to the other end of the resistor RS13 and the GND end, pin 3 of the chip U4 is respectively connected to the resistor RS14 and the capacitor CS9, the other end of the resistor RS14 is connected to the PWM dimming circuit 18, the other end of the capacitor CS9 is connected to the GND end, and pin 5 of the chip U4 is respectively connected to the power supply circuit 13 and the Hall reset circuit 15;

[0070] By adopting the above technical solution, a current sampling circuit 14 is set to collect the current signal in the circuit and feed it back to the intelligent control module 16. Combined with the feedback signal of the voltage sampling circuit 19 and the internal logic, the power change of the product can be synchronously monitored.

[0071] Furthermore, the voltage sampling circuit 19 includes a resistor RS15, a resistor RS16, a resistor RS17, a capacitor CS10 and a Zener diode Z1, wherein one end of the resistor RS16 is connected to the capacitor CS10 and the intelligent control module 16 respectively, the other end of the resistor RS16 is connected to the resistor RS17, the resistor RS15 and the negative electrode of the Zener diode Z1 respectively, the positive electrode of the Zener diode Z1, the other end of RS17 and the other end of CS10 are connected to the GND terminal respectively, and the other end of the resistor RS15 is connected to the BUS terminal.

[0072] By adopting the above technical solution, a voltage sampling circuit 19 is set up to collect the voltage signal in the circuit and feed it back to the intelligent control module 16. Combined with the feedback signal of the current sampling circuit 14 and the internal logic, the power change of the product can be synchronously monitored.

[0073] Furthermore, the Hall reset circuit 15 includes a resistor RS18, a resistor RS19, a capacitor CS11, a capacitor CS12, a voltage-stabilizing diode Z2 and a chip U5, wherein pin 1 of the chip U5 is respectively connected to the negative electrode of the resistor RS18, the resistor RS19, the capacitor CS11 and the voltage-stabilizing diode Z2, pin 2 of the chip U5 is connected to the GND terminal, pin 3 of the chip U5 is respectively connected to the other end of the resistor RS19, the capacitor CS12 and the intelligent control module 16, the positive electrode of the voltage-stabilizing diode Z2, the other end of the capacitor CS11 and the other end of the capacitor CS12 are respectively connected to the GND terminal, and the other end of the resistor RS18 is respectively connected to the power supply circuit 13 and the current sampling circuit 14.

[0074] By adopting the above technical solution, setting the Hall reset circuit 15, the Hall effect can be used to control the level of the PWM level signal, combined with the intelligent control module 16, and finally achieve the function of controlling the reset of the product.

[0075] Furthermore, the intelligent control module 16 includes 11 PIN pins, among which PIN5 pin is connected to the current sampling circuit 14, PIN6 pin is connected to the voltage sampling circuit 19, PIN7 pin is connected to the GND terminal, PIN8 pin is respectively connected to the power supply circuit 13, the current sampling circuit 14 and the Hall reset circuit 15, PIN9 pin is connected to the PWM dimming circuit 18, PIN10 pin is connected to the PWM dual-channel color adjustment circuit 17, and PIN11 pin is connected to the Hall reset circuit 15.

[0076] By adopting the above technical solution, an intelligent control module 16 is set up, which integrates functions such as MCU and SRAM. Combined with the supporting control firmware and APP, the ultimate goal of intelligent control such as switching, adjusting color temperature and brightness, implementing monitoring, and resetting can be achieved.

[0077] Furthermore, the method for realizing the T-shaped LED lamp tube of the present invention comprises the following steps:

[0078] (i) mounting the dual-color LED lamp beads 7 on the light source substrate 6 to form a light source assembly;

[0079] (ii) Fix the light source assembly on the heat dissipation strip 4;

[0080] (iii) clamp the reflective paper 5 on both sides of the heat dissipation strip 4 located on the light source substrate 6, and pass it through the interior of the base 3;

[0081] (iv) fixing the first driving module 2 and the second driving module 8 respectively on the two ends of the heat dissipation bar 4 located on the light source substrate 6;

[0082] (V) Connect the first driving module 2 and the second driving module 8 to the light source assembly through the wiring harness terminal;

[0083] (VI) Fix the lamp holder 1 and the base 3 with screws to complete the installation.

[0084] In summary, the present invention can be compatible with the application of HF ballast by setting the first filament circuit 10, the second filament circuit 12 and the step-down DC isolation circuit 11. At the same time, the design of the DC isolation circuit can enable the product to meet the requirements of the UL standard DC component, and the innovative introduction of thermistor design in the filament circuit can ensure that the product does not fail when it is mistakenly connected to the mains, and has recoverability, ensuring safety and reliability; the present invention converts the constant current output of the HF ballast into a constant voltage output by setting a rectifier and voltage stabilizing circuit 20, which can effectively improve the stability of the circuit during dimming; the present invention can realize APP control of product light color change by setting a PWM dimming circuit 18, a PWM dual-channel color adjustment circuit 17 and a power supply circuit 13, combined with an intelligent control module 16; the present invention can realize the function of real-time monitoring of product power changes by setting a current sampling circuit 14 and a voltage sampling circuit 19, combined with an intelligent control module 16; the present invention can control the level of the PWM signal by setting a Hall reset circuit 9, and can achieve the purpose of controlling product reset by combining with the intelligent control module 16.

[0085] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A T-shaped LED lamp tube, comprising a base (3), characterized in that: A heat dissipation bar (4) is provided above the base (3); a light source substrate (6) is provided above the heat dissipation bar (4); a two-color LED lamp bead (7) is provided on the light source substrate (6); reflective paper (5) is provided above the heat dissipation bar (4) and on both sides of the light source substrate (6); a first drive module (2) is provided above the heat dissipation bar (4) and at one end of the light source substrate (6); a second drive module (8) is provided above the heat dissipation bar (4) and at the other end of the light source substrate (6); the first drive module (2) is electrically connected to the second drive module (8); the second drive module (8) is electrically connected to the light source substrate (6); lamp holders (1) are provided at both ends of the base (3); the lamp holders (1) are fixed to the base (3) by screws; a PC cover (9) is provided above the base (3); and the base (3) and the PC cover (9) are an integrated structure; The first driving module (2) comprises a first filament circuit (10), a buck DC isolation circuit (11) and a second filament circuit (12); the second driving module (8) comprises a power supply circuit (13), a current sampling circuit (14), a Hall reset circuit (15), an intelligent control module (16), a PWM dual-channel color adjustment circuit (17), a PWM dimming circuit (18), a voltage sampling circuit (19) and a rectifier voltage stabilization circuit (20); wherein the first filament circuit (10) is connected to an input terminal PIN1 and an input terminal PIN2 respectively, the second filament circuit (12) is connected to an input terminal PIN3 and an input terminal PIN4, the first filament circuit (10) is also connected to the buck DC isolation circuit (11), the second filament circuit (12) is connected to the buck DC isolation circuit (11) and the input terminals of the rectifier voltage stabilization circuit (20) respectively, and the buck DC isolation circuit (11) is connected to the input terminal of the rectifier voltage stabilization circuit (20); The output end of the rectifier and voltage regulator circuit (20) comprises a Bus end and a GND end, wherein the Bus end is respectively connected to the PWM dimming circuit (18), the PWM dual-channel color adjustment circuit (17), the power supply circuit (13) and the voltage sampling circuit (19), and the GND end is respectively connected to the PWM dimming circuit (18), the PWM dual-channel color adjustment circuit (17), the power supply circuit (13), the current sampling circuit (14), the voltage sampling circuit (19) and the Hall reset circuit (15). The PWM dimming circuit (18) is respectively connected to the BUS end, The PWM dual-channel color adjustment circuit (17) is respectively connected to the BUS terminal, the GND terminal and the intelligent control module (16); the power supply circuit (13) is respectively connected to the BUS terminal and the GND terminal; the current sampling circuit (14) is respectively connected to the GND terminal and the intelligent control module (16); the voltage sampling circuit (19) is respectively connected to the BUS terminal, the GND terminal and the intelligent control module (16); and the Hall reset circuit (15) is respectively connected to the GND terminal and the intelligent control module (16).

2. The T-shaped LED lamp tube according to claim 1, characterized in that: The first filament circuit (10) comprises a temperature fuse F1, a temperature fuse F2, a thermistor RT1 and a capacitor CS1, and the second filament circuit (12) comprises a temperature fuse F3, a temperature fuse F4, a thermistor RT2 and a capacitor CS2, wherein the input end of the temperature fuse F1 is connected to the input end PIN1, the input end of the temperature fuse F2 is connected to the input end PIN2, the input end of the temperature fuse F3 is connected to the input end PIN3, the input end of the temperature fuse F4 is connected to the input end PIN4, the output end of the temperature fuse F1 is respectively connected to the thermistor RT1 and the capacitor CS1, the output end of the temperature fuse F2 is respectively connected to the thermistor RT1, the capacitor CS1 and the step-down DC isolation circuit (11), the output end of the temperature fuse F3 is respectively connected to the thermistor RT2, the capacitor CS2 and the step-down DC isolation circuit (11), and the output end of the temperature fuse F4 is respectively connected to the thermistor RT2 and the capacitor CS2; The step-down DC isolation circuit (11) comprises a safety capacitor CX1 and a safety capacitor CX2, wherein one end of the safety capacitor CX1 is respectively connected to one end of the safety capacitor CX2, one end of the thermistor RT1 in the first filament circuit (10), and one end of the capacitor CS1; the other end of the safety capacitor CX1 is respectively connected to one end of the thermistor RT2 in the second filament circuit (12), one end of the capacitor CS2, and a rectifier and voltage regulator circuit (20); one end of the safety capacitor CX2 is respectively connected to one end of the safety capacitor CX1, one end of the thermistor RT1 in the first filament circuit (10), and one end of the capacitor CS1; and the other end of the safety capacitor CX2 is connected to the rectifier and voltage regulator circuit (20).

3. The T-shaped LED lamp tube according to claim 1, characterized in that: The rectifier and voltage-stabilizing circuit (20) comprises a diode DS1, a diode DS2, a diode DS3, a diode DS4 and an electrolytic capacitor CE1, wherein the diode DS1, the diode DS2, the diode DS3 and the diode DS4 are connected end to end in sequence to form a bridge rectifier module, the input end of the bridge rectifier module is respectively connected to the second filament circuit (12) and the step-down DC isolation circuit (11), the positive electrode of the output end of the bridge rectifier module is a BUS end, which is respectively connected to the positive electrode of the electrolytic capacitor CE1, the PWM dimming circuit (18), the PWM dual-channel color adjustment circuit (17), the power supply circuit (13) and the voltage sampling circuit (19), the negative electrode of the output end of the bridge rectifier module is a GND end, which is respectively connected to the negative electrode of the electrolytic capacitor CE1, the PWM dimming circuit (18), the PWM dual-channel color adjustment circuit (17), the power supply circuit (13), the current sampling circuit (14), the voltage sampling circuit (19), the Hall reset circuit (15) and the intelligent control module (16).

4. The T-shaped LED lamp tube according to claim 1, characterized in that: The PWM dimming circuit (18) includes a chip U1, wherein pin 1 of the chip U1 is connected to the GND terminal, pin 2 of the chip U1 is respectively connected to capacitor CS4, resistor RS2 and the intelligent control module (16), the other ends of capacitor CS4 and resistor RS2 are connected to the GND terminal, pin 3 of the chip U1 is connected to resistor RS1, the other end of resistor RS1 is connected to the GND terminal, pin 4 of the chip U1 is respectively connected to resistor RS3 and capacitor CS3, the other end of resistor RS3 is connected to the BUS terminal, the other end of capacitor CS3 is connected to the GND terminal, and pin 5 of the chip U1 is connected to MOS tube Q1. The G pole of the chip U1 is connected, the 6th pin of the chip U1 is respectively connected to the resistor RS4, the resistor RS5 and the current sampling circuit (14), the other ends of the resistor RS4 and the resistor RS5 are connected to the GND terminal, the 7th pin of the chip U1 is connected to the S pole of the MOS tube Q1, the D pole of the MOS tube Q1 is respectively connected to the positive pole of the diode DS5 and one end of the inductor T1, the other end of the inductor T1 is respectively connected to the negative pole of the electrolytic capacitor CE2, the resistor RS6 and the PWM dual-channel color adjustment circuit (17), the negative pole of the diode DS5, the positive pole of the electrolytic capacitor CE2 and the resistor RS6 are respectively connected to the BUS terminal; The PWM dual-channel color adjustment circuit (17) includes a chip U3, wherein pin 1 of the chip U3 is respectively connected to a resistor RS8 and a capacitor CS5, pin 2 of the chip U3 is respectively connected to the other end of the capacitor CS5 and the PWM dimming circuit (18), the other end of the resistor RS8 is connected to the BUS terminal, pin 3 of the chip U3 is connected to the negative electrode of one of the LED light sources, pin 4 of the chip U3 is connected to the negative electrode of the other LED light source, pin 6 of the chip U3 is respectively connected to one end of the capacitor CS7 and the intelligent control module (16), the other end of the capacitor CS7 is connected to the GND terminal, pin 7 of the chip U3 is respectively connected to the negative electrode of the diode DS6, one end of the capacitor CS6 and the negative electrode of the voltage regulator diode Z3, the positive electrode of the voltage regulator diode Z3 is connected to the other end of the capacitor CS6 and the GND terminal, the positive electrode of the diode DS6 is connected to one end of the resistor RS7, the other end of the resistor RS7 is connected to the BUS terminal, and pin 8 of the chip U3 is connected to the GND terminal.

5. The T-shaped LED lamp tube according to claim 1, characterized in that: The power supply circuit (13) comprises a resistor RS9, a resistor RS10, a resistor RS11, a capacitor CS8, an electrolytic capacitor CE3, an inductor L1, a diode DS7 and a chip U2, wherein pin 1 of the chip U2 is connected to one end of the capacitor CS8, the other end of the capacitor CS8 is connected to the GND end, pin 2 of the chip U2 is respectively connected to the resistor RS9 and the resistor RS10, the other end of the resistor RS9 is connected to the GND end, the other end of the resistor RS10 is respectively connected to the inductor L1, the positive electrode of the electrolytic capacitor CE3, the resistor RS11, the current sampling circuit (14), the Hall reset circuit (15) and the intelligent control module (16), pin 4 of the chip U2 is connected to the BUS end, pins 5, 6, 7 and 8 of the chip U2 are respectively connected to the GND end, and are connected to the other end of the inductor L1 and the negative electrode of the diode DS7, and the positive electrode of the diode DS7 is respectively connected to the negative electrode of the electrolytic capacitor CE3, the resistor RS11 and the GND end.

6. The T-shaped LED lamp tube according to claim 1, characterized in that: The current sampling circuit (14) comprises a resistor RS12, a resistor RS13, a resistor RS14, a capacitor CS9 and a chip U4, wherein pin 1 of the chip U4 is respectively connected to the resistor RS12 and the intelligent control module (16), the other end of the resistor RS12 is respectively connected to pin 4 of the chip U4 and the resistor RS13, the pin 2 of the chip U4 is respectively connected to the other end of the resistor RS13 and the GND end, the pin 3 of the chip U4 is respectively connected to the resistor RS14 and the capacitor CS9, the other end of the resistor RS14 is connected to the PWM dimming circuit (18), the other end of the capacitor CS9 is connected to the GND end, and the pin 5 of the chip U4 is respectively connected to the power supply circuit (13) and the Hall reset circuit (15); The voltage sampling circuit (19) comprises a resistor RS15, a resistor RS16, a resistor RS17, a capacitor CS10 and a voltage stabilizing diode Z1, wherein one end of the resistor RS16 is connected to the capacitor CS10 and the intelligent control module (16) respectively, the other end of the resistor RS16 is connected to the resistor RS17, the resistor RS15 and the cathode of the voltage stabilizing diode Z1 respectively, the anode of the voltage stabilizing diode Z1, the other end of the RS17 and the other end of the CS10 are connected to the GND terminal respectively, and the other end of the resistor RS15 is connected to the BUS terminal.

7. The T-shaped LED lamp tube according to claim 1, characterized in that: The Hall reset circuit (15) comprises a resistor RS18, a resistor RS19, a capacitor CS11, a capacitor CS12, a voltage-stabilizing diode Z2 and a chip U5, wherein pin 1 of the chip U5 is respectively connected to the resistor RS18, the resistor RS19, the capacitor CS11 and the negative electrode of the voltage-stabilizing diode Z2, pin 2 of the chip U5 is connected to the GND terminal, pin 3 of the chip U5 is respectively connected to the other end of the resistor RS19, the capacitor CS12 and the intelligent control module (16), the positive electrode of the voltage-stabilizing diode Z2, the other end of the capacitor CS11 and the other end of the capacitor CS12 are respectively connected to the GND terminal, and the other end of the resistor RS18 is respectively connected to the power supply circuit (13) and the current sampling circuit (14).

8. The T-shaped LED lamp tube according to claim 1, characterized in that: The intelligent control module (16) comprises 11 PIN pins, wherein the PIN5 pin is connected to the current sampling circuit (14), the PIN6 pin is connected to the voltage sampling circuit (19), the PIN7 pin is connected to the GND terminal, the PIN8 pin is respectively connected to the power supply circuit (13), the current sampling circuit (14) and the Hall reset circuit (15), the PIN9 pin is connected to the PWM dimming circuit (18), the PIN10 pin is connected to the PWM dual-channel color adjustment circuit (17), and the PIN11 pin is connected to the Hall reset circuit (15).

9. The method for realizing a T-shaped LED lamp according to any one of claims 1 to 8, characterized in that: The following steps are involved: (i) mounting the bicolor LED lamp beads (7) on the light source substrate (6) to form a light source assembly; (ii) fixing the light source assembly on the heat dissipation strip (4); (iii) clamping the reflective paper (5) on both sides of the heat dissipation strip (4) located on the light source substrate (6) and passing it through the interior of the base (3); (iv) fixing the first driving module (2) and the second driving module (8) respectively on the two ends of the heat dissipation bar (4) located on the light source substrate (6); (V) connecting the first driving module (2) and the second driving module (8) to the light source assembly via a wiring harness terminal; (VI) Fix the lamp holder (1) and the base (3) with screws to complete the installation.

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