FORM-2
THE PATENTS ACT. 1970
&
The Patents Rules. 2003
COMPLETE SPECIFICATION (See section 10 and rule 13)
l.TITLE OF THE INVENTION
OMNI AND UNIDIRECTIONAL SOLAR LANTERN.
2. APPLICANT
a) NAME: Kirloskar Integrated Technologies Limited
b) NATIONALITY: An Indian Company registered under the provisions of the Companies Act, 1956.
c) ADDRESS: 13/A, Karve Road, Kothrud, Pune- 411038,M.S. India. 2.A. INVENTORS
a) NAME: GOYAL DEVENDRA JAY ANT
6) Nationality: Indian
c) ADDRESS: A7/17, Vishnu Vihar, Bibvevadi Kondhwa Road, Bibvevadi, Pune 411037, Maharashtra,
India.
a) NAME: GOKHALE SATISH MADHUKAR
b) NATIONALITY: Indian
c) ADDRESS: 826, Anandi Apartments, Bhandarkar Road, Lane No. 13, Pune- 411004, Maharashtra, India.
3. PREAMBLE TO THE DESCRIPTION
COMPLETE
The following specification describes the invention and the manner in which it is to be performed.

FIELD OF THE INVENTION:
The present invention relates to solar-energy-based illuminating device. More particularly, the invention relates to solar-energy-based portable, unbreakable Light Emitting Diode (LED) lamp with a conical reflector , a magnetic slider, a side/directional reflector for customized directional use of reflected light as per end user's requirement, herein referred to as task light. The user can either use it as a normal lamp to illuminate a room or can use it as a task light by sliding the directional reflector upwards. The lantern can also be turned upside down and hooked to the ceiling and can be used like a conventional bulb or as a compact fluorescent lamp (CFL).
BACKGROUND OF THE INVENTION:
There is a wide gap between power supply and demand in India. Heavy and incessant consumption of traditional source of energy has resulted in their gradual depletion over a period of time accompanied by environmental damages. Almost 35 - 40 percent population still consumes kerosene for lightning purpose in remote places where electricity source is not available. Situation has reached to such alarming position, nations world wide have been forced to consider the non- conventional energy as a solution for the present energy crisis. Solar energy is one very important source of non conventional energy.
India receives 5000 trillion kilo watt hour per year of solar energy which is far more than the total energy consumption of the country. For years, solar technology has been considered as an expensive alternative but however due to the technological advancement, solar energy based system is now economically feasible.
Among many other applications using solar, solar lamp is one of the technologies which is cost effective and has reached remote places also. The lamp is portable and user friendly thereby widening its utility scope. A solar lamp is a portable light fixture composed of a LED lamp, a photovoltaic solar panel, and a rechargeable battery. Solar lamps recharge during the day. At dusk, they turn on (usually automatically, although some of them include a switch for on, off and automatic) and remain illuminated overnight, depending on how much sunlight they receive during the day. Solar lantern's function is to uniformly light the entire non illuminated area, i.e.

provide omni directional pure white light. This illumination though preferred may create unease if customized directional use of reflected light is needed, as like, reading a book, finding lost item/s in the dark.
Herein is an effort made to control the illumination of reflected light as per requirement i.e. either provide full illumination or directional illumination.
BRIEF DESCRIPTION OF DRAWINGS:
The present invention will be more fully understood and appreciated by reading the following detailed description in conjunction with the accompanying drawings, in which:
Figure 1 is the front view of the solar LED lantern.
Figure 2 is the cross sectional view of side/directional reflector of the solar light emitting diode lantern.
Figure 3 is a graphical representation of LED wattage curve.
Figure 4 is a graphical representation of 360 degree illumination of solar LED lantern.
Figure 5 is a graphical representation of 225 degree illumination (task light) of solar LED lantern.
Part List in figure 1: 1: Solar lantern
2: Upper chamber of the solar lantern
3: Lower chamber of the solar lantern
4: Transparent housing for the lantern
5: Side/directional reflector

6: Power LED
7: Main/conical reflector
8: Heat sink
9: Top cap of the lantern
10: Main body of the lantern - left
11: Main body of the lantern - right
12: Slider
13: Magnets
14: Metal strip for side/directional reflector
15: Nylon cover for slider
16: Nylon cover for side/directional reflector
17: Battery cover
18: USB/switch cover
DISCLOSURE OF THE INVENTION:
The main object of the present invention is to provide a portable solar LED lantern having a directional reflector to customize direction of reflected light.
An object of the present invention is a solar LED with a directional reflector provided with a manual operated magnetic slider which is movable in nature having no direct mechanical contact with the lantern.

An object of the present invention is to provide a solar LED lantern having a main/conical reflector which is designed for uniform 360 degree illumination and a side/directional reflector which is designed for task light illumination, thereby serving the need either of using 360 degree illumination and /or using task light illumination as required.
Another object of the present invention is a solar LED lantern with an application of magnetism for converting 360 degree illumination to task light; which is devoid of electrical system, and is manually operated thereby making it easy to maintain and making it more user friendly in nature.
Another object of the present invention is a solar LED lantern which is easy to maintain and user friendly in nature due to the magnetism crated between the magnetic slider and the side/directional reflector which prevents water, moisture and dust accumulation inside the solar lantern enclosure thereby increasing the product life.
Further object of the present invention is a solar lantern which can be turned upside down and hooked to the ceiling using the handle provided thereby can be used like a conventional bulb or like a compact fluorescent lantern.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS:
The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The embodiments are chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. It is understood that various omissions, substitutions of equivalents are contemplated as circumstance may suggest or render expedient, but is intended to cover the application or implementation without departing from the spirit or scope of the present invention.

In a preferred embodiment of the invention, the solar lantern (1) comprises an upper (2) and a lower chamber (3). The upper chamber (2) comprises; a transparent housing cover (4), a side/directional reflector (5), a power LED (6), a main conical reflector (7), aluminum heat sink (8), and a top cap for the lantern (9). The lower chamber comprises (3); the main body left (10) and right half (11), a slider (12), magnets (13), metal strips (14), the side/directional reflector (5), nylon cover for the slider (15) and nylon cover for the side/directional reflector (16) and battery cover (17). Apart from main reflector (7), aluminum heat sink (8), and USB/switch cover (18) all the other components are made from polycarbonate. The side/directional reflector (5) is placed inside the main body casing halves behind the energy storage device i.e. battery pack housing. Whereas the slider (12) is mounted outside the main body casing halves inside the grooves. This side/directional reflector (5) can be manually moved up and down by means of the magnets mounted on the inner walls of the slider and the side/directional reflector, without direct mechanical contact between the slider (15) and side-reflector (5).Absence of mechanical interaction between the above mentioned components prevents moisture or water ingress, dust accumulation and thereby substantially increases the product life and making it user friendly and easy to maintain.
The main reflector (7) is housed amidst on top of the main body halves of solar lantern (1). The function of this main conical reflector (7) is to provide uniform 360 degree illumination to the entire room. All round illumination though preferred, may create unease in case customized directional light source is needed, as like reading a book, finding lost item/s in the dark.
The solar lantern contains unique feature of lwatt power LED, side/directional reflector (5), conical reflector (7) with a magnetic slider (15) and mobile charging facility, incorporated in a light portable package (1). The user can either use it as a normal lamp to illuminate a room or can use it as a task light by sliding the directional reflector (5) upwards. The lantern (1) also includes step switching where, primarily, the LED drives with lwatt output power and then with 0.5 watt output power in the next stage depending on the user requirement. The lantern (1) can also be turned upside down and hooked to the ceiling using the handle provided on the top cap (9) and thus can be used like a conventional bulb or a CFL.

The solar lantern is lightweight, portable, user friendly in nature. The lithium ion rechargeable battery used is charged by solar photovoltaic modules, grid and also by electrical devices. The solar lantern has applications for charging various electrical devices as like mobile and laptop.
The said invention is an application of non-interactive mechanism in a solar lantern to provide reflected light source either for all around 360 degree illumination or as customized directional light as per end-user requirement.
Other features, advantages, and objects of the present invention will become more apparent and be more readily understood from the following non limiting illustrations.
The following illustrations indicate the time duration and intensity of illumination provided by solar lantern and the illumination distribution of solar lamp and solar task light.
Illustration 1:
The experiment is performed to demonstrate the constant illumination of LED for the complete battery discharge cycle. The Lithium ion battery used in the solar lantern is fully charged to 4.2 volts to carry out 100 per cent LED discharge and the data obtained is as enumerated in figure 3. The current and voltage measurement for input i.e. from battery to circuit and output i.e. from circuit to LED is logged and corresponding wattages are calculated. It is observed that the input and output wattage curve is constant throughout the battery discharge cycle .The total LED back up obtained is more than 18 hours. Thereby proves that the illumination provided by solar lantern is constant throughout the battery discharge cycle, thereby ensuring constant illumination to the end user.

Illustration 2:
The experiment is performed to demonstrate all round light distribution for solar lantern in a dark room. The solar lantern is kept at full illumination (1 watt) for 18 hours and lux is measured at a distance of 1 feet at various angles at 8 distinct points with a step change of 45 degrees around the lantern. Figure 4 indicates the graphical representation of the performed illustration. It is observed that the intensity of illumination is constant all around the lantern i.e. 360 degrees, thereby ensuring that the end user gets uniform illumination around the lantern throughout the battery discharge cycle.
Illustration 3:
The experiment is performed to demonstrate light distribution for solar lantern in a dark room with the directional reflector on i.e. when the magnetic slider is raised upwards. The solar lantern is kept at full illumination (1 watt) for 18 hours and lux is measured at a distance of 1 feet at various angles at 16 distinct points with a step change of 22.5 degrees around the lantern. Figure 5 indicates the graphical representation of the performed illustration. The graphs plotted as in figure 4 and figure 5 indicate that there is an increase in the lux when the slider is on as compared to the regular solar lantern i.e. in figure 4 lux is around 80 as compared to that in figure 5 wherein lux is around 110. It is observed that the light gets concentrated in particular region which increases the brightness in that region thereby enabling the user to read and/or study comfortably.
While considerable emphasis has been placed herein, many details have been set forth for purpose of illustration, it will be appreciated that many alterations can be made and that many modifications can be made in the preferred embodiment without departing from the principles of the invention. These and other changes in the preferred embodiment as well as other embodiments of the inventions will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

ADVANTAGES OF THE PRESENT INVENTION:
The present invention ensures customized directional illumination as per end user's requirement.
The side/directional reflector blocks portion of the reflected light from the main reflector and directs this light as per requirement.
The product is portable, user friendly and needs minimum maintenance since there is no direct physical contact between the slider and the side/directional reflector thereby preventing water moisture ingress and dust accumulation thereby increasing the product life.
The mechanism between the magnetic slider and the side/directional reflector achieves more than optimum effectiveness to generate desired motion with minimal efforts.
The product can be used like a conventional bulb or a CFL by turning it upside down and hooked to the ceiling using the handle provided on the top cap.

CLAIMS: We claim;
1) A portable solar-energy-based, unbreakable Light Emitting Diode (LED) lamp device comprising: solar light emitting diode, a main conical reflector designed for 360 degree equal illumination and a side movable directional reflector with a magnetic slider designed for focused light illumination as per end user requirement. An application of magnetism is used for converting 360 degree illumination to task light which is devoid of electrical system, thereby making it easy to maintain and making it more user friendly in nature.
2) A claim as claimed in claim 1; wherein a portable solar LED lantern ensures and controls customized directional illumination as per end user's requirement done by means of the side/directional reflector with a magnetic slider i.e. serving the need either of using equal 360 degree illumination and /or using constant task light illumination as required thereby serving dual purpose of using it for full illumination and /or as task light as per end user's requirement. The mechanism between the magnetic slider and the side/directional reflector achieves more than optimum effectiveness to generate desired motion with minimal efforts.