DESC:F O R M 2
THE PATENTS ACT, 1970
(39 of 1970)
The Patent Rule, 2003

COMPLETE SPECIFICATION
(See section 10 and rule 13)

“HIGH POWER UNDERWATER LED ILLUMINATION SYSTEM”
By
Planys Technologies Private Limited
An Indian company
03 - A2, 3rd Floor, IITM Incubation cell, Madras Research Park, Kanagam Road Tharamani, Chennai 600113

The following specification particularly describes the invention and the manner in which it is to be performed
FIELD OF THE INVENTION
The present invention relates generally to system for illumination using light-emitting diodes (LEDs) and more particularly to LED-based lighting system with high luminous output and high thermal performance employed for illuminating underwater environment.
BACKGROUND OF THE INVENTION
Visual observation is one of the most common task carried out during underwater inspection. The lighting is required by diver/ Remotely operated underwater vehicles (ROVs)/ Autonomous underwater vehicles (AUVs) for carrying out visual inspection and other tasks under deep water. Underwater lighting is also an essential part of oil and gas platforms, scientific instruments which are present underwater. As the natural light from the sun disappears within a short depth beneath the surface of the water, the need for artificial lighting becomes evident. The lighting affects the quality of video which is recorded/ transmitted by the camera. The feed from the camera is the only feedback which is available to individuals/ supervisors which are carrying/ monitoring the tasks underwater.
For decades now, the most common artificial lighting technology used for illuminating underwater inspection and survey tasks has been the incandescent bulbs. The halogen incandescent bulbs have been used successfully underwater for many years. However, the inefficiency of the system due to lower light output makes the high power lighting systems bulkier resulting in difficult to integrate in compact system. Further, the current system uses low efficiency light generation systems which results in high heat losses. Where, the produced heat causes thermal deformation of pressure bearing structures, reducing and damaging the life of light producing systems, electrical boards and components, and seals etc.
Other drawbacks of the state of the art systems includes non-robustness where light is produced by a thin glowing metal filament that is prone to sudden shock and vibration failure. And also the illumination system is not customizable based on the amount of light required, either the system gives full power or zero power. Thus lacks in controlling the light intensity to achieve the best video clarity.
Thus the present invention focussed to address aforesaid drawbacks of the system by providing a LED based illuminating system with a state-of-the-art two chamber construction along with design feature on its front chamber surface resulting in an overall low working temperature for LED to ensuring optimal performance and improved life.
OBJECTIVE OF THE INVENTION
These objectives are provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This objective are not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
An important objective of the invention aims at providing a compact solution for the shortcomings of the above mentioned systems.
Another objective of the invention is to optimise the performance of the LED illuminating system.
Further objective of the current invention is to control the light intensity of the LED illuminating system for better video clarity.
Yet another objective of the current invention is to improve the light output of the system to achieve higher efficiency.
Another objective of the current invention is to increase the thermal conductivity in the system to achieve low working temperature for LED to ensure optimal performance and improved life.
These objectives are achieved according to the invention, an underwater illumination system comprising of water tight enclosure with front chamber and rear chamber connected through a connecting channel. The front chamber having design feature on its outer surface houses a light emitting diode (LED) and a light reflector. And the rear chamber houses a LED driver PCB. The two ends of the enclosure are covered along with a seal by a front end cap and a rear end cap respectively. In operation the electric power is supplied to the LED driver PCB through a processor, which triggers the LED to illuminate.
Object of the present invention is not limited to the above mentioned problem. Other technical problems that are not mentioned will become apparent to those skilled in the art from the following description.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in greater detail with reference to an embodiment which is illustrated in the drawing figures:
Figure 1 shows underwater LED illumination system, according to an embodiment of the present invention; and
Figure 2 shows flowchart for operation of underwater illumination system, according to an embodiment of the present invention.
Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures.
DETAILED DESCRIPTION OF THE INVENTION
In the following description, the present invention will be explained with reference to example embodiments thereof. However, these embodiments are not intended to limit the present invention to any specific example, embodiment, environment, applications or particular implementations described in these embodiments. Therefore, description of these embodiments is only for purpose of illustration rather than to limit the present invention. It should be appreciated that, in the following embodiments and the attached drawings, elements unrelated to the present invention are omitted from depiction; and dimensional relationships among individual elements in the attached drawings, unless specifically claimed, are illustrated only for ease of understanding, but not to limit the actual scale and dimension.
Figure 1 shows underwater LED illumination system, according to an embodiment of the present invention. An underwater illumination system 100 for illuminating underwater environment, comprising a water tight enclosure 102 having a front chamber 104 and a rear chamber 106 connected through a connecting channel 108. The front chamber 104 houses a light emitting diode (LED) 112 and a reflector 114, wherein the reflector 114 positioned over the LED 112 allows light to pass through for visual observation. Usually the reflector 114 is made of transparent material. LED 112 is a high power high efficiency illumination source, mounted on a metal body inside the front chamber 104. The rear chamber 106 houses a LED driver printed circuit board (PCB) 116, which is associated with the LED 112 by means of a thin cable passing through the channel, wherein the LED driver PCB 116 triggers the LED 112 to illuminate underwater.
The two ends of the housing 102 are covered with a pair of end caps along with a seal. A front end cap 118a covers the free end of front chamber 104 and a rear end cap covers 118b the rear end of the rear chamber 106.
The front chamber 104 has design feature 110 on its outer surface which increases heat dissipation from the chamber 104 ensuing overall low working temperature for LED 112. In a particular embodiment design feature 110 can be fins.
Figure 2 shows flowchart for operation of underwater illumination system, according to an embodiment of the present invention. Accordingly, in operation 100A, the electric power 122 is supplied to the LED driver PCB 116 through a processor 120, which triggers the LED 112 to illuminate. LED driver PCB 116 controls the variation in light intensity of LED 112 by varying the power supply.
Heat generated by the LED is dissipated from the system to the surrounding by the LED mounted metal body and the design feature on the front chamber, ensuing overall low working temperature for LED ensuring optimal performance and improved life.
Further, the heat transfer from front chamber to rear chamber is restricted due to small area of the connecting channel which allows low heat transfer between the chambers. Thus, protecting LED driver PCB from high heat energy released from the LED ensuring optimal working of LED driver PCB.
The innovative chamber construction of the light emitting system allows use of high power LEDs in a smaller form factor. It also improves the performance of camera and overall visual tasks, reducing the number of lights required.
Light weight, compactness and low power requirements of the light emitting system enables it to be compatible with large number of electrical observational class ROVs. And also the system is more flexible to engage numerous types of LEDS and light reflectors.
The underwater light emitting system finds application in use on ROVs as a support system for vision to capture photos and videos. Further, for underwater divers as a lighting system. Generally the system can be used in any kind of underwater application where high power requirements, modularity and compactness are desired.
Although but one preferred embodiment of the invention has been illustrated, it will be obvious to those skilled in this art that other embodiments may be readily designed within the scope and teachings thereof.

I/we claim,
1. An underwater illumination system, comprising: a housing having a front chamber and a rear chamber connected through a connecting channel, the front chamber houses a light emitting diode (LED) and the rear chamber a LED driver printed circuit board (PCB), the LED driver PCB and the LED are associated by means of a thin cable passing through the channel, wherein the LED driver PCB triggers the LED to illuminate underwater.
2. The underwater illumination system according to claim 1, wherein the LED driver PCB controls the light intensity of LED by varying the power supply.
3. The underwater illumination system according to claim 1, wherein the front chamber has a design feature on its outer surface which enhances heat dissipation from the chamber ensuing overall low working temperature for LED.
4. The underwater illumination system according to claim 3, wherein said design feature is fins.
5. The underwater illumination system according to claim 1, further comprising a pair of end caps, a front end cap covering the free end of front chamber and a rear end cap covering the rear end of the rear chamber.
6. The underwater illumination system according to claim 1, further comprises a reflector positioned over the LED allowing light to pass through for visual observation.
7. The underwater illumination system according to claim 6, wherein the reflector is a transparent material.

Dated this the 07th day of November, 2017

ABSTRACT
Title: High power underwater LED illumination system
The present invention relates to LED-based lighting system with high luminous output and high thermal performance employed for illuminating underwater environment. Accordingly an underwater illumination system comprising of water tight enclosure with front chamber and rear chamber connected through a connecting channel. The front chamber having design feature on its outer surface houses a light emitting diode (LED) and a light reflector. And the rear chamber houses a LED driver PCB. The two ends of the enclosure are covered along with a seal by a front end cap and a rear end cap respectively. In operation the electric power is supplied to the LED driver PCB through a processor, which triggers the LED to illuminate.
Figure 1 (for publication)
,CLAIMS:

I/we claim,
1. An underwater illumination system, comprising: a housing having a front chamber and a rear chamber connected through a connecting channel, the front chamber houses a light emitting diode (LED) and the rear chamber a LED driver printed circuit board (PCB), the LED driver PCB and the LED are associated by means of a thin cable passing through the channel, wherein the LED driver PCB triggers the LED to illuminate underwater.
2. The underwater illumination system according to claim 1, wherein the LED driver PCB controls the light intensity of LED by varying the power supply.
3. The underwater illumination system according to claim 1, wherein the front chamber has a design feature on its outer surface which enhances heat dissipation from the chamber ensuing overall low working temperature for LED.
4. The underwater illumination system according to claim 3, wherein said design feature is fins.
5. The underwater illumination system according to claim 1, further comprising a pair of end caps, a front end cap covering the free end of front chamber and a rear end cap covering the rear end of the rear chamber.
6. The underwater illumination system according to claim 1, further comprises a reflector positioned over the LED allowing light to pass through for visual observation.
7. The underwater illumination system according to claim 6, wherein the reflector is a transparent material.

Dated this the 07th day of November, 2017