CN213880338U

CN213880338U - Diode protection circuit and diode structure

Info

Publication number: CN213880338U
Application number: CN202120056431.5U
Authority: CN
Inventors: 张积
Original assignee: Shenzhen Light Feel Optoelectronics Co ltd
Current assignee: Shenzhen Light Feel Optoelectronics Co ltd
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2021-08-03
Anticipated expiration: 2031-01-08

Abstract

The utility model discloses a diode protection circuit and diode structure, emitting diode LED1, diode D2, diode D3, inductance L1 forms drive circuit, follow the input alternating current, through rectifier D1 rectification is the direct current, is used for emitting diode LED 1's power supply, switching tube M2, diode D4, electric capacity C1 and resistance R2 constitute the protection circuit, through inductance L1, switching tube M1 receives the signal of telecommunication when the circuit normally works, the control unit carries out the control of switching tube M1 with switching tube M2 according to the signal of telecommunication received, after the drive circuit breaks down, the protection circuit communicates, diode D4 clamps the signal of telecommunication that produces from switching tube M1 on the first value, will switching tube M1 breaks off, thereby protecting other semiconductor elements in the circuit.

Description

Diode protection circuit and diode structure

Technical Field

The utility model relates to a light emitting diode technical field especially relates to a diode protection circuit and diode structure.

Background

The light emitting diode has a small size, is power-saving and durable, and as the manufacturing process is mature and the price is reduced, the light emitting diode is more and more popular recently as a light source. In addition, the light emitting diode has low working voltage (only 1.5-3V), can actively emit light, has certain brightness, and the brightness can be adjusted by voltage or current, and simultaneously has the characteristics of impact resistance, vibration resistance and long service life (10 ten thousand hours).

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a diode protection circuit and diode structure, the drive circuit who aims at solving most emitting diode among the prior art does not have protect function, damages the back when emitting diode, leads to drive circuit to take place the short circuit, leads to the technical problem of the semiconductor damage among the drive circuit.

To achieve the above object, the present invention provides a diode protection circuit, which includes an input terminal, a rectifier D1, a diode D2, a diode D3, a diode D4, a switch M1, a switch M2, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, an inductor L1, a light emitting diode LED1, and a control unit, wherein one end of the rectifier D1 is electrically connected to the input terminal, the other end of the rectifier D1 is electrically connected to the light emitting diode LED1, one end of the resistor R1 is electrically connected to the light emitting diode LED1, the other end of the resistor R1 is electrically connected to the capacitor C1, one end of the inductor L1 is electrically connected to the light emitting diode LED1, the other end of the inductor L1 is electrically connected to an emitter of the switch M1, a base of the switch M1 is electrically connected to a collector of the switch M2, and an emitter of the switch M1 is electrically connected to the control unit 3, the base of the switch tube M2 is electrically connected to the resistor R1, the emitter of the switch tube M2 is grounded, the diode D2 is connected in parallel with the LED1 and the inductor L1, the diode D3 is connected in parallel with the resistor R1, and the resistor R2, the capacitor C1 and the diode D4 are connected in parallel.

The diode D2 is a zener diode.

Wherein, the control unit is a singlechip controller.

Wherein, the switch tube M1 and the switch tube M2 are both thyristors.

The utility model also provides a diode structure adopting the diode protection circuit, which comprises a fixed seat, a light-emitting chip, a connecting frame, a cover body, a shell, a placing frame, a rotating shaft, a pressure lever and a button, wherein the cover body is fixedly connected with the fixed seat and positioned at the side surface of the fixed seat, the light-emitting chip is fixedly connected with the fixed seat and positioned in the cover body, the connecting frame is fixedly connected with the fixed seat and positioned above the fixed seat, the rotating shaft is movably connected with the connecting frame and positioned at the side surface of the connecting frame, the shell is fixedly connected with the rotating shaft and arranged at the outer side wall of the rotating shaft, the pressure lever is fixedly connected with the shell and positioned above the shell, the button is movably connected with the fixed seat and positioned above the fixed seat, and the placing frame is fixedly connected with the fixed seat, and is positioned at the bottom of the fixed seat.

Wherein, the top and the bottom of fixing base all are provided with the mounting hole.

The beneficial effects of the utility model are embodied in: the LED1, the diode D2, the diode D3 and the inductor L1 form a driving circuit, ac power is input from the input terminal, and rectified to dc power by the rectifier D1 for supplying power to the LED1, the switching tube M2, the diode D4, the capacitor C1 and the resistor R2 form a protection circuit, the switching tube M1 receives an electrical signal through the inductor L1 when the circuit normally operates, the control unit controls the switching tube M1 and the switching tube M2 according to the received electrical signal, the protection circuit is connected after the driving circuit fails, the diode D4 clamps the electrical signal generated from the switching tube M1 above a first potential value, and the switching tube M1 is disconnected, so that other semiconductor elements in the circuit are protected.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic circuit diagram of a diode protection circuit according to the present invention.

Fig. 2 is a schematic structural diagram of a diode structure according to the present invention.

1-input end, 2-control unit, 3-fixing seat, 4-light emitting chip, 5-connecting frame, 6-cover body, 7-shell, 8-placing frame, 9-rotating shaft, 10-pressure bar, 11-button and 12-mounting hole.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, the present invention provides a technical solution: a diode protection circuit comprises an input end 1, a rectifier D1, a diode D2, a diode D3, a diode D4, a switch tube M1, a switch tube M2, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, an inductor L1, a light emitting diode LED1 and a control unit 2, wherein one end of the rectifier D1 is electrically connected with the input end 1, the other end of the rectifier D1 is electrically connected with the light emitting diode LED1, one end of the resistor R1 is electrically connected with the light emitting diode LED1, the other end of the resistor R1 is electrically connected with the capacitor C1, one end of the inductor L362 is electrically connected with the light emitting diode LED1, the other end of the inductor L1 is electrically connected with an emitter of the switch tube M1, a base of the switch tube M1 is electrically connected with a collector of the switch tube M2, and emitters of the switch tube M1 are respectively electrically connected with the resistor R3 and the control unit 1, the base of the switching tube M2 is electrically connected to the resistor R1, the emitter of the switching tube M2 is grounded, the diode D2 is connected in parallel with the LED1 and the inductor L1, the diode D3 is connected in parallel with the resistor R1, the resistor R2, the capacitor C1 and the diode D4 are connected in parallel, the diode D2 is a zener diode, the control unit 2 is a single-chip controller, and the switching tube M1 and the switching tube M2 are both thyristors.

In this embodiment, the light emitting diode LED1, the diode D2, the diode D3, and the inductor L1 form a driving circuit, ac power is input from the input terminal 1, and rectified into dc power by the rectifier D1, for supplying power to the light emitting diode LED1, the switch tube M2, the diode D4, the capacitor C1 and the resistor R2 form a protection circuit, through the inductor L1, the switch tube MI receives electric signals when the circuit works normally, the control unit 2 controls the switch tube M1 and the switch tube M2 according to the received electric signals, when the driving circuit fails, the protection circuit is connected, the diode D4 clamps the electric signal generated from the switching tube M1 above the first potential value, and the switching tube M1 is disconnected, thereby protecting other semiconductor elements in the circuit.

Referring to fig. 2, the present invention further provides a diode structure using the diode protection circuit, which includes a fixing base 3, a light emitting chip 4, a connecting frame 5, a cover 6, a housing 7, a holder 8, a rotating shaft 9, a pressing rod 10 and a button 11, wherein the cover 6 is fixedly connected to the fixing base 3 and is located at a side of the fixing base 3, the light emitting chip 4 is fixedly connected to the fixing base 3 and is located inside the cover 6, the connecting frame 5 is fixedly connected to the fixing base 3 and is located above the fixing base 3, the rotating shaft 9 is movably connected to the connecting frame 5 and is located at a side of the connecting frame 5, the housing 7 is fixedly connected to the rotating shaft 9 and is mounted on an outer side wall of the rotating shaft 9, the pressing rod 10 is fixedly connected to the housing 7 and is located above the housing 7, the button 11 with 3 swing joint of fixing base are located the top of fixing base 3, the rack 8 with 3 fixed connection of fixing base are located the bottom of fixing base 3.

In this embodiment, when the diode structure is used, the housing 7 is wound around the rotating shaft 9 to rotate upwards, the housing 7 is fixed above the fixing seat 3 due to gravity, the press rod 10 presses the button 11 to push down, the driving circuit inside the fixing seat 3 is communicated to enable the light emitting chip 4 to work, when the diode structure is not used, the housing 7 is wound around the rotating shaft 9 to rotate downwards until the bottom of the housing 7 is contacted with the placing frame 8, so that the placing frame 8 and the housing 7 form a closed space, the cover 6 is isolated from the outside to prevent the cover 6 from being influenced by the outside and causing the cover 6 to be damaged, and when the diode structure is not used, the cover 6 is protected in the housing 7 to prevent the cover 6 from being damaged.

Further, the top and the bottom of the fixed seat 3 are both provided with mounting holes 12.

In the present embodiment, the fixing base 3 is installed at a proper position through the installation hole 12, so that the installation and the removal of the diode structure are facilitated.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. A diode protection circuit is characterized by comprising an input end, a rectifier D1, a diode D2, a diode D3, a diode D4, a switch tube M1, a switch tube M2, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, an inductor L1, a light emitting diode LED1 and a control unit, wherein one end of the rectifier D1 is electrically connected with the input end, the other end of the rectifier D1 is electrically connected with the light emitting diode LED1, one end of the resistor R1 is electrically connected with the light emitting diode LED1, the other end of the resistor R1 is electrically connected with the capacitor C1, one end of the inductor L1 is electrically connected with the light emitting diode LED1, the other end of the inductor L1 is electrically connected with an emitter of the switch tube M1, a base of the switch tube M1 is electrically connected with a collector of the switch tube M2, and emitters of the switch tube M1 are electrically connected with the resistor R3 and the control unit respectively, the base of the switch tube M2 is electrically connected to the resistor R1, the emitter of the switch tube M2 is grounded, the diode D2 is connected in parallel with the LED1 and the inductor L1, the diode D3 is connected in parallel with the resistor R1, and the resistor R2, the capacitor C1 and the diode D4 are connected in parallel.

2. A diode protection circuit as claimed in claim 1, wherein said diode D2 is a zener diode.

3. The diode protection circuit of claim 2, wherein the control unit is a single chip controller.

4. A diode protection circuit as claimed in claim 3, wherein said switching transistor M1 and said switching transistor M2 are thyristors.

5. A diode structure adopting the diode protection circuit according to claim 4, comprising a fixing base, a light emitting chip, a connecting frame, a cover body, a housing, a placing frame, a rotating shaft, a pressing rod and a button, wherein the cover body is fixedly connected with the fixing base and positioned on the side surface of the fixing base, the light emitting chip is fixedly connected with the fixing base and positioned in the cover body, the connecting frame is fixedly connected with the fixing base and positioned above the fixing base, the rotating shaft is movably connected with the connecting frame and positioned on the side surface of the connecting frame, the housing is fixedly connected with the rotating shaft and mounted on the outer side wall of the rotating shaft, the pressing rod is fixedly connected with the housing and positioned above the housing, the button is movably connected with the fixing base and positioned above the fixing base, and the placing frame is fixedly connected with the fixing base, and is positioned at the bottom of the fixed seat.

6. A diode structure as claimed in claim 5, wherein the top and bottom of said mounting base are provided with mounting holes.