TWM482233U - Improved LED lamp compatible with the T5/T8 for electronic ballast - Google Patents

Description

Improvement of LED tube compatible with T5/T8 electronic ballast

This creation is related to the circuit design of an LED tube, especially an LED tube that is compatible with the T5/T8 electronic ballast and has a LED lamp that is fully activated and shortens the lighting time.

Press, the general lamp holder is used to light a traditional lamp, such as a T5 or T8 lamp, as shown in Figure 1, which is a circuit block diagram for a T5 or T8 lamp, on the lamp holder 1 An electronic ballast 2 is provided for lighting the conventional lamp 3 of the T5 or T8. This is because the conventional lamp 3 of T5 or T8 must pass an instantaneous high voltage to heat the filament to ionize the gas inside the tube. In order to smoothly illuminate the lamp tube 3 and cause the lamp tube 3 to emit light, when an LED lamp tube is inserted into the lamp holder and activated by the electronic ballast, the electronic ballast and the LED lamp tube will be subjected to When the high voltage and high current are turned on, the electronic ballast or the LED tube is burnt, so the lamp holder 1 is incompatible with the current LED tube.

Since the above-mentioned lamp holder is incompatible with the current LED tube, which causes inconvenience in use, a manufacturer has developed an LED lamp which is compatible with the electronic ballast, as disclosed in the announcement No. M459527 A novel patent case for an LED lamp tube that can be accommodated in an electronic ballast with a preheating current, comprising a second buffer circuit, a waveform conversion circuit and at least one LED light string, wherein the buffer circuit is connected to the LED light tube Extremely, one end of the waveform conversion circuit is connected to the buffer circuits respectively, and the other end is connected to the LED string.

Although the above case can be avoided by burning a snubber circuit composed of resistors Electronic ballasts and LED lights, but because they can not judge the voltage change of the electronic ballast during start-up, whether it is an instant type or preheating type electronic ballast, it has the disadvantage that the startup failure causes the flicker or the start delay is too long.

The main purpose of this creation is to provide an LED lamp tube compatible with the T5/T8 electronic ballast, which has the advantages of ensuring the complete start of the LED tube and shortening the lighting time of the LED tube.

In order to achieve the above object, the improvement of the LED lamp tube compatible with the T5/T8 electronic ballast provided by the present invention comprises two pre-starting circuits, one of which is connected to the pipe body respectively. An electrode of the end; a rectifying circuit comprising a plurality of fast diodes, one end of the rectifying circuit being connected to one end of the pre-starting circuit; and one voltage detecting circuit having one end connected to the rectifying circuit One end; an integrated circuit connected to the rectifier circuit, having an input end and an output end, wherein the input end is connected to the other end of the voltage detecting circuit; a voltage control switch, the system and the integrated body The output ends of the circuit are connected; at least one LED string is formed by connecting a plurality of LED elements in series, and one end of the LED string is connected to the rectifier circuit, and the other end is connected in series with the voltage control switch.

The improvement of the LED lamp tube compatible with the T5/T8 electronic ballast provided by the present invention detects the voltage through the voltage detecting circuit, so that the integrated circuit controls whether the voltage control switch is turned on or not, and protects the LED lamp. The string will not be damaged by high voltage and high current, ensuring that the ballast is fully activated without misjudging the load short circuit or open circuit causing the ballast to close or malfunction.

1‧‧‧ lamp holder

2‧‧‧Electronic ballast

3‧‧‧Light tube

10‧‧‧ tube body

20‧‧‧ electrodes

30‧‧‧Pre-start circuit

31‧‧‧Polymer fuse

40‧‧‧Rectifier circuit

41‧‧‧fast diode

50‧‧‧Voltage detection circuit

51‧‧‧First resistance

52‧‧‧second resistance

53‧‧‧ diode

60‧‧‧ integrated circuit

61‧‧‧ input

62‧‧‧output

70‧‧‧Voltage control switch

80‧‧‧LED string

81‧‧‧LED components

90‧‧‧Protection circuit

91‧‧‧resistance

200‧‧‧ lamp holder

201‧‧‧Electronic ballast

Figure 1 is a block diagram of a conventional T5/T8 lamp holder.

Figure 2 is an external view of the creation.

Figure 3 is a circuit diagram of the creation.

Figure 4 is a block diagram of the creation.

Please refer to Figures 2, 3 and 4 for the appearance and circuit diagram of this creation. And a block diagram, which discloses an improvement of an LED lamp tube compatible with a T5/T8 electronic ballast, which has a pipe body 10, and the pipe body 10 has two electrodes 20 at two ends, and the raft is inserted. Connected to the lamp holder 200 of the T5/T8, the tube body 10 further includes: two pre-starting circuits 30, one end of the pre-starting circuit 30 is respectively connected to the electrode terminal 20, wherein the pre-starting circuit The 30 series includes a polymeric fuse 31 that is connected in parallel between the two electrodes 20.

A rectifier circuit 40 includes a bridge rectifier circuit formed by a plurality of fast diodes 41, one end of which is connected to one end of the pre-start circuits 30.

A voltage detecting circuit 50 is connected to the other end of the rectifying circuit 40. The voltage detecting circuit 50 is formed by a first resistor 51 and a second resistor 52 connected in series, and the first resistor is connected. 51 is further connected in series with a diode 53 for protection.

An integrated circuit 60 is connected to the rectifier circuit 40 and has an input terminal 61 and an output terminal 62. The input terminal 61 is connected between the first resistor 51 and the second resistor 52.

A voltage controlled switch 70 is connected to the integrated circuit 60, which is a gold oxide half field effect transistor element.

At least one LED string 80 is formed by connecting a plurality of LED elements 81 in series, and One end of the LED string 80 is connected to the rectifier circuit 40, and the other end is connected in series with the voltage control switch 70.

a protection circuit 90, in parallel with the voltage control switch 70, and with the LED lights The strings 80 are connected in series, and the protection circuit 90 is formed by two resistors 91. Thus, the resistance of the protection circuit can absorb the high voltage generated when the electronic ballast is activated, and the LED string 80 is prevented from being burnt.

For further understanding of the structure of the creation, the use of technical means and expected The effect of this work, I will describe the use of this creation, I believe that this can have a deeper and more specific understanding of this creation, as follows: The LED tube of this creation is installed in the lamp holder for T5/T8 tube When 200 is turned on, when the power switch is turned on, the electronic ballast 201 in the lamp holder 200 will generate an instantaneous high voltage, and the current generated by the voltage is transmitted to the pre-start circuit 30 via the electrode 20, because the pre-start circuit 30 is The polymer fuse 31 has a resistance value, so it can replace the filament in the T5/T8 tube, so that the electronic ballast 201 can not be burnt due to short circuit, and can effectively simulate the filament of the fluorescent tube to help the electronic ballast to start properly and current. The abnormal current protection function, the current flows to the rectifier circuit 40, converts the alternating current into a direct current, and then flows to the LED light string 80, the voltage detecting circuit 50, the integrated circuit 60, and the like, wherein the voltage detecting circuit 50 The voltage of the inflow integrated circuit 60 can be detected, and the donor circuit 60 determines whether the voltage control switch 70 is triggered to form a conduction. When the voltage control switch 70 is turned on, the LED light string 80 is formed through the path. Conductive Light. Since the voltage control switch 70 has a protection circuit 90 in parallel, when the voltage control switch 70 is not turned on during the warm-up phase, the protection circuit 90 can absorb the high voltage generated at this time, so that the LED light string 80 can be prevented from being burnt.

Hereby, the characteristics of this creation and its achievable expected effects are stated as follows:

1. Since the present invention is provided with a voltage detecting circuit 50, it can be used to detect the voltage, and the integrated circuit 60 can control whether the voltage control switch 70 is turned on or off in time, and can correctly activate the LED tube with the shortening of the lighting. Time and the advantages of ensuring that the LED tube and electronic ballast are fully activated.

2. The pre-start circuit 30 provided in the present invention is a polymer fuse 31, so that in addition to having the function of replacing the T5/T8 filament, avoiding short circuit and preventing the electronic ballast 201 from being burnt, it has the function of a fuse, and It has the advantage of preventing overcurrent protection.

3. The protection circuit 90 provided in the present invention is composed of a resistor 91 and is connected in parallel to the voltage control switch 70. Therefore, when the voltage control switch 70 is not turned on during the warm-up phase, the protection circuit 90 can absorb the current The high voltage generated can avoid the burning of the LED string 80 and has the advantage of protecting the LED string 80.

In summary, this creation has its excellent progress and practicality in similar products. At the same time, it has investigated the technical information about such structures at home and abroad. The same structure has not been found in the literature. This creation has already possessed new types of patent requirements, and applied for it according to law.

However, the above-mentioned ones are only one of the preferred embodiments of the present invention, and the equivalent structural changes in the application of the present specification and the scope of the patent application are intended to be included in the scope of the present patent.

20‧‧‧ electrodes

30‧‧‧Pre-start circuit

31‧‧‧Polymer fuse

40‧‧‧Rectifier circuit

41‧‧‧fast diode

50‧‧‧Voltage detection circuit

51‧‧‧First resistance

52‧‧‧second resistance

53‧‧‧ diode

60‧‧‧ integrated circuit

61‧‧‧ input

62‧‧‧output

70‧‧‧Voltage control switch

80‧‧‧LED string

81‧‧‧LED components

90‧‧‧Starting circuit

91‧‧‧resistance

Claims (7)

The invention relates to an improvement of an LED lamp tube compatible with a T5/T8 electronic ballast, which has a pipe body, the pipe body has two electrodes respectively, and the pipe body further comprises: two pre-starting circuits, One end of the pre-starting circuit is respectively connected to the electrode of the two ends of the tube; a rectifying circuit comprising a plurality of fast diodes, one end of the rectifying circuit being connected to one end of the pre-starting circuit; a voltage a detecting circuit, one end of which is connected to the other end of the rectifying circuit; an integrated circuit is connected to the rectifying circuit, and has an input end and an output end, wherein the input end and the voltage detecting circuit are different One end is connected; a voltage control switch is connected to the output end of the integrated circuit; at least one LED light string is formed by connecting a plurality of LED elements in series, and one end of the LED light string is connected to the rectifier circuit, The other end is in series with the voltage controlled switch. The improvement of the LED lamp compatible with the T5/T8 electronic ballast according to claim 1 of the patent application, wherein the pre-starting circuit comprises a polymer fuse, the polymer fuse is connected in parallel between the two electrodes . According to the improvement of the LED lamp tube compatible with the T5/T8 electronic ballast according to claim 1, wherein the voltage detecting circuit is formed by connecting a first resistor and a second resistor in series, and The input end of the integrated circuit is connected between the first resistor and the second resistor. According to the improvement of the LED lamp tube compatible with the T5/T8 electronic ballast as described in claim 3, wherein the voltage detecting circuit further comprises a diode, the diode, the first resistor and The second resistors are all connected in series with each other. The improvement of the LED lamp compatible with the T5/T8 electronic ballast according to the first aspect of the patent application, wherein the voltage control switch is a gold oxide half field effect transistor component. The improvement of the LED lamp compatible with the T5/T8 electronic ballast according to claim 1 of the patent application, further comprising a protection circuit in parallel with the voltage control switch and the LED lamp string Form a series. The improvement of the LED lamp compatible with the T5/T8 electronic ballast according to claim 6 of the patent application scope, wherein the protection circuit is formed by connecting two resistors in series.