DESC:FIELD OF THE INVENTION
The present invention relates to an external snap-fit repairable light-emitting diode (LED) driver and more particularly, to the LED driver for LED streetlights which is repairable and easy to replace. Moreover, the driver of the present invention is installed outside the housing of the LED streetlight. The driver is encapsulated in one cabinet into another cabinet along with a unique heat sink design that distributes the heat and signals the IC (Integrated Circuit). As a result of the facilitation, the cost of managing a light facility can be remarkably reduced.

BACKGROUND OF THE INVENTION
Streetlamp/streetlight is the municipal communal facility that is closely related to people's daily life considering the requirement of light by pedestrians and the safety of traffic at night. However, LED lights cannot directly use the conventional mains grid voltage, because of the characteristics of LED lighting. All LED lights need an LED driver to convert the power supply into a more suitable one. This helps to prevent burnout and can lower the risk of fire. LED drivers are usually switching mode devices that convert the input voltage (Typically 120-220 VAC or 12 VDC) into a voltage at which the current drawn by the LED's is equal to its drive current. They also keep the voltage and current flowing through an LED circuit at its rated level.

LED drivers are similar to ballasts for fluorescent lamps or transformers for low-voltage bulbs: they provide LEDs with the electricity they require to function and perform at their best. LEDs require drivers for two purposes: 1. LEDs are designed to run on low voltage (12-24V), direct current electricity. However, most places supply higher voltage (120-277V), alternating current electricity. An LED driver rectifies higher voltage, alternating current to low voltage, direct current. 2. LED drivers also protect LEDs from voltage or current fluctuations. A change in voltage could cause a change in the current being supplied to the LEDs. LED light output is proportional to its current supply, and LEDs are rated to operate within a certain current range (measured in amps). Therefore, too much or too little current can cause light output to vary or degrade faster due to higher temperatures within the LED.

When an LED stops operating before the end of its rated lifetime, it can usually be saved if the driver is replaced. Drivers often fail prematurely due to high internal operating temperatures. Battery-like components called electrolytic capacitors are typically the cause of death. Electrolytic capacitors have a gel inside them that gradually evaporates over the lifespan of the driver. High temperatures quicken the evaporation of the gel and shorten the life of the capacitor, causing the driver, and hence your LED, to stop working unexpectedly.

In recent years along with the development of semiconductor technology, the semiconductor light sources begin progressively to be applied to the white light illuminating field, especially in the field of streetlamp lighting, but the LED light source has the problem of heat dissipation and has not been obtained the fine solution. The LED street lamp has had a strong impact on the popularization of this technology often because heating causes damage. In addition, the quality of the LED lighting fixtures can be said to be dependent on the heat dissipation performance. In the case of streetlamps, the heat dissipation structure is more important because it uses high wattage (currently 90W or more).

Almost all conventional LED drivers installed in any outdoor LED light are made of IP65. To make them waterproof, the user encapsulates them into a special potting compound. This makes it very difficult to open and because of them, all the drivers are scrapped once they go faulty. It not only adds up to the E-waste, and it is also a very expensive affair.

Alternatively, it takes a lot of time for the replacement of the conventional LED streetlight drivers which are installed in the same housing of the LED streetlight because many bolts need to be loosened, each wire must be separated, re-fastened, and connected. In other words, the replacement of LED drivers of streetlights is performed by using high ladders at night when traffic is low, usually by unscrewing many bolts that combine and close 3 or more LED mounting PCs, disconnecting electric wires, and assembling new LED drivers. Since it takes a long time and causes an interruption in the traffic, excessive manpower is required. In one approach to solving this problem, the housing with the LED-mounted PCB is completely replaced, which is a huge waste of national and social costs. Further, the person climbing the pole or using the ladder to reach heights risk their life and leads to death also. Further, the drivers of the conventional system must be replaced as these are not repairable leading to enormous E-waste.

Conventional LED drivers have been improved to be more robust and more protective. But these types could not be saved from lightning strikes and surges which is the main cause of LED driver failures. Others have tried the use of Surge protection devices (SPDs) but it had not resolved the problem.

The present invention has been made to solve the above problems and to provide an external snap-fit repairable LED driver for LED streetlight.

OBJECTIVES OF THE INVENTION
The prime objective of the present invention is to provide an external snap-fit repairable Light-Emitting Diode (LED) driver for LED streetlights which is repairable and easy to replace.

Another objective of the present invention is to provide an external LED driver which is encapsulated in one cabinet into another cabinet along with a unique heat sink design that distributes the heat and signals the IC (Integrated Circuit).

Another objective of the present invention is to provide a LED driver which can install outside the housing of the LED streetlight.

Another objective of the present invention is to provide a cost-effective and environment-friendly external LED driver.

Another objective of the present invention is to provide a LED driver which is easy to open and creates minimum wastage.

These and other objectives of the present invention will be apparent from the drawings and descriptions herein. Every objective of the invention is attained by at least one embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION
The following description includes the preferred best mode of one embodiment of the present invention. It will be clear from this description of the invention that the invention is not limited to these illustrated embodiments but that the invention also includes a variety of modifications and embodiments thereto. Therefore, the present description should be seen as illustrative and not limiting. While the invention is susceptible to various modifications and alternative constructions, it should be understood, that there is no intention to limit the invention to the specific form disclosed, but, on the contrary, the invention is to cover all modifications, alternative constructions, and equivalents falling within the spirit and scope of the invention as defined in the claims.
As used herein, the singular forms “a”, “an” and “the” designate both the singular and the plural, unless expressly stated to designate the singular only.
The present invention is an external snap-fit repairable LED driver for LED streetlights which is repairable and easy to replace. The driver is encapsulated in one cabinet, preferably made of polycarbonate, and then into another cabinet along with a unique heat sink design that distributes the heat and signals to the IC (Integrated Circuit). As a result of the facilitation, the cost of managing a light facility can be remarkably reduced.
One embodiment of the present invention is an external snap-fit repairable LED driver for LED streetlight that includes an LED driver with input and output unit, and a base plate with an input and an output mode to connect with the LED drive input and output cord.
The input and output unit are one of the means selected from cord, pin or connector.
The external LED driver is encapsulated in one cabinet into another cabinet along with a unique heat sink design that distributes the heat and signals the IC (Integrated Circuit).

Moreover, the driver of the present invention is installed outside the housing of the LED streetlight. The present driver is easy to open during repairing and creates minimum wastage which is only a thin layer of potting and the metal cabinet.

The driver has an input and output cord that are matched to the electrical characteristics of the LED or LEDs. In an example, the LED driver has an output cord that is connected to the MCPCB. The output cord can be of any length.
Advantageously, the driver of the present invention has a unique encapsulation design which makes it repairable and reusable. Further, the driver does not integrate into the same housing as the LED PCB. The driver is attached to the LED PCB through the output cable of length as required to install it at the bottom of the pole.
In an example, the driver of LED streetlight of the present invention includes the following:
1. External snap-fit repairable LED driver with input and output unit,
2. Base plate having input and output mode to match with the LED driver input and output cord, and
3. Input and Output unit.
The driver of the present invention is an external snap-fit repairable LED driver which is waterproof, potted, repairable, and is able to signal the IC about the heat of the MOSFET.
In an operation, the drivers for LED streetlights can be used in the existing LED streetlights without changing the condition of the existing streetlights or can be used with the new lights.

The LED driver of the present invention with the external snap-fit repairable mechanism can be replaced without much hassle or without much expenditure when the driver is damaged and required to be changed.

This significantly reduces the cost of managing the lighting system and makes it easy to meet various light distribution regulations and has a significant effect on reducing inventory.

Although the invention has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternate embodiments of the invention, will become apparent to persons skilled in the art upon reference to the description of the invention. It is therefore contemplated that such modifications can be made without departing from the spirit or scope of the present invention as defined.
,CLAIMS:1.An external snap-fit repairable LED driver for LED streetlight comprising:
• an LED driver with input and output unit, and
• a base plate with an input and an output mode to connect with the LED driver input and output cord
wherein the external LED driver is encapsulated in one cabinet into another cabinet along with a unique heat sink design that distributes the heat and signals the IC (Integrated Circuit).

2. The driver as claimed in claim 1, wherein the input and output unit are selected from cord, pin and connector.

3.The driver as claimed in claim 1, wherein the input and output unit are matched to the electrical characteristics of the LED.

4.The driver as claimed in claim 1, wherein the output unit of LED driver is connected to the MCPCB.