FORM-2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE
Specification
(See Section 10 and Rule 13) CONTROLLED LIGHTING SYSTEM FOR A VEHICLE
MAHINDRA TWO WHEELERS LIMITED
an Indian Company of Dl Block, Plot No. 18/2 (Part), MIDC, Chinchwad, Pune-411019 Maharashtra, India.
INVENTORS:
1. JASTI KIRANKUMAR
2. NERKAR HARSHALA RATILAL
3. SUNDARAM SUDARSHAN
4. VENKAT RAMAN YOGARAJA
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE NATURE OF THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED

This application is a divisional application to Indian Patent Application No. 3734/MUM/2012 issued on December 31, 2012, the entire contents of which, is specifically incorporated herein by reference.
FIELD OF THE DISCLOSURE
The present disclosure relates to the field of lighting in vehicles.
BACKGROUND
A vehicle is provided with at least one head lamp for illuminating the road ahead of vehicle. A head lamp enables illuminating the front path as the vehicle advances through a dark area. Although there are requirements in some countries, where the head lamp is required to be maintained in ON condition during day time for specific reasons, the head lamp is required to illuminate the path in front of the vehicle in low lighting conditions such as at night and wherein sufficient day light is not available. Conventionally, when a vehicle is parked in areas having low lighting conditions and the ignition is turned OFF, the head lamp and other lighting arrangements of the vehicle are turned OFF. This causes inconvenience to the driver to walk to a desired location on alighting from the vehicle in the absence of any lighting.
Hence, there was felt a need for a system that addresses the drawback of the prior art vehicle lighting arrangement.
OBJECTS
Some of the objects of the system of the present disclosure, which at least one embodiment herein satisfies, are as follows:
An object of the present disclosure is to provide convenience to the vehicle driver to reach his destination on alighting from the vehicle.

Another object of the present disclosure is to provide controlled lighting for lighting the path in front of the vehicle for a predetermined time interval.
Another of the present disclosure is to provide a reliable controlled lighting system.
Other objects and advantages of the present disclosure will be more apparent from the following description when read in conjunction with the accompanying figures, which are not intended to limit the scope of the present disclosure.
SUMMARY
In accordance with the present disclosure there is provided a controlled lighting system for a vehicle having a battery and at least one lighting arrangement and an ignition system operable by an ignition key, the system includes:
• a controller adapted to receive a triggering signal via the ignition key, said controller adapted to process said triggering signal to generate a controlling signal; and
• an actuator configured to receive said controlling signal on switching the ignition system from an operative condition to an inoperative condition, said controlling signal to switch ON and maintain the lighting arrangement in an operative state at a pre-determined illumination intensity corresponding to the triggering signal,
the pre-determined illumination level being lower than the maximum illumination intensity, corresponding to the level of charge in the
battery.
Typically, the triggering signal is at least one vehicle electrical signal. Typically, the controller includes a pulse-width modulation. Optionally, the actuator may be integral with the controller

Typically, the pre-determined illumination intensity is maintained constant over a
pre-determined time period.
Alternatively, the pre-determined illumination intensity is gradually diminishing
over a pre-determined time period.
Typically, the pre-determined time period and the pre-determined illumination
intensity are fixed.
Optionally, the pre-determined time period and the pre-determined illumination
intensity are variable by a switching module.
Alternatively, the pre-determined illumination intensity of the lighting arrangement
may gradually diminish from the pre-determined illumination intensity.
Typically, the controller is adapted to detect the level of charge in the battery. The
pre-determined illumination intensity is variable corresponding to the level of
charge in the battery.
Additionally, the controller is adapted to receive input from at least one sensor
corresponding to the external environmental lighting conditions. The received input
is adapted to prompt the driver of the vehicle to operate the lighting arrangement
corresponding to the external environmental lighting conditions.
BRIEF DESCRIPTION OF ACCOMPANYING DRAWING
The controlled lighting system for a vehicle of the present disclosure will now be described with the help of accompanying drawing, in which: Figure 1 schematically illustrates the controlled lighting system in accordance with the present disclosure.
DETAILED DESCRIPTION
A system and a method of the present disclosure will now be described with reference to the embodiments which do not limit the scope and ambit of the
disclosure.

The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
A vehicle includes a battery (14), at least one lighting arrangement (12) and an ignition system (not shown in Figure) operable by an ignition key (16). The ignition system of the vehicle is turned from an operative condition to its inoperative condition and vice versa by operation of the ignition key (16) between an ON position and OFF position respectively.
The controlled lighting system (10), illustrated in Figure 1, of a vehicle, in accordance with the present disclosure, enables selectively switching a lighting arrangement (12), typically a headlamp, of the vehicle to an ON configuration on shifting the ignition key (16) from an ON position to an OFF position. The power required for operating the lighting arrangement (12) is supplied from the vehicle battery (14) via a controller (20) and an actuator (18). The battery (14) provides electrical energy to the actuator (18) via the controller (20). The controller (20) is configured to generate a triggering signal, corresponding to at least one vehicle electrical signal, when the ignition system is switched from an operative condition to an inoperative condition. The controller (20), typically by pulse-width modulation, is configured to process the triggering signal and generate a controlling signal. Pulse width modulation enables delivering energy through a succession of pulses having a pulse width. The controller (20)

regulates flow of controlling signal to the actuator (18) by increasing or decreasing the pulse width. The controller (20) supplies the controlling signal to the actuator (18) to actuate the illumination of the lighting arrangement (12) at a pre-determined illumination intensity corresponding to the triggering signal. The pre-determined illumination intensity is lower than or equal to the maximum illumination intensity corresponding to the level of charge in the battery (14).
The pre-determined illumination intensity is maintained constant over a predetermined time period; thereafter the illumination intensity of the lighting arrangement (12) is gradually reduced to be turned to an OFF condition. The predetermined time interval for maintaining lighting arrangement (12) in the ON condition is adjustable by the driver of the vehicle by means of a switching module (22). In an alternate embodiment, the illumination of the lighting arrangement (12) is gradually reduced over the predetermined time interval, after shifting the ignition key to the OFF position, and is turned to an OFF condition on expiry of the predetermined time interval. The pre-determined time period and the pre-determined illumination intensity is fixed depending on the requirement. Alternatively, the predetermined time interval and the predetermined illumination intensity are variable by a switching module (22).
Thus, when the ignition of the vehicle is switched from an operative condition to an inoperative condition, the controller (20) detects the position of the ignition key, being in its ON position or OFF position. When the ignition key (16) is in its OFF position, the controller (20) generates a triggering signal corresponding to at least one vehicle electrical signal. The controller (20) processes the triggering signal to generate a controlling signal corresponding to the triggering signal and the level of charge in the battery (14). The controlling signal is transmitted to the lighting arrangement (12) via the actuator (18) which

enables actuating the illumination of the lighting arrangement (12). This enables the driver to have a fair indication of the surrounding and provide a convenient environment for walking through a pre-determined distance towards a desired destination.
In accordance with an embodiment of the present disclosure, a light sensing sensor is provided to detect the external environmental lighting condition. The light sensing sensor transmits signal to an indication arrangement to prompt the driver of the vehicle not to utilize the controlled lighting system under adequate lighting conditions. This indicates the driver to manually turn OFF the lighting arrangement (12) under daylight or adequate lighting conditions, thus preventing unnecessary illumination due to inadvertence of the driver.
In accordance with another embodiment, there is provided a battery health indicator for indicating the level of charge in the battery of the vehicle. When the level of charge in the battery falls below a pre-determined level, an indication is provided to the driver, indicating that the lighting arrangement (12) will be turned to OFF condition when the ignition key is shifted from its ON position to its OFF position.
TECHNICAL ADVANCEMENTS
The technical advancements offered by the present disclosure include the realization of:
• providing convenience to the vehicle driver in reaching his destination after alighting from the vehicle;
• providing controlled lighting of the path in front of the vehicle for a predetermined time interval; and
• providing a reliable controlled lighting system.

Throughout this specification the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or
steps.
The use of the expression "at least" or "at least one" suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having," are inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It is also to be understood that additional or alternative steps may be employed.
When an element or layer is referred to as being "on", "engaged to", "connected to" or "coupled to" another element or layer, it may be directly on, engaged, connected or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly engaged to", "directly connected to" or "directly coupled

to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.

We claim:
1. A controlled lighting system for a vehicle having a battery and at least one
lighting arrangement and an ignition system operable by an ignition key, said
system includes:
• a controller adapted to receive a triggering signal via the ignition key, said controller adapted to process said triggering signal to generate a controlling signal; and
• an actuator configured to receive said controlling signal on switching the ignition system from an operative condition to an inoperative condition, said controlling signal adapted to switch ON and maintain the lighting arrangement in an operative state at a pre-determined illumination intensity corresponding to said triggering signal,
said pre-determined illumination intensity being lower than the maximum illumination intensity, corresponding to the level of charge in the battery.
2. The controlled lighting arrangement as claimed in claim 1, wherein said triggering signal is at least one vehicle electrical signal.
3. The controlled lighting arrangement as claimed in claim 1, wherein said controller includes a pulse-width modulation.
4. The controlled lighting arrangement as claimed in claim 1, wherein said actuator is integral with said controller.
5. The controlled lighting arrangement as claimed in claim 1, wherein said predetermined illumination intensity is maintained constant over a pre-determined time period.

6. The controlled lighting arrangement as claimed in claim 1, wherein said predetermined illumination intensity is gradually diminishing over a predetermined time period.
7. The controlled lighting arrangement as claimed in claim 5, wherein said predetermined time period and said pre-determined illumination intensity are variable by a switching module.
8. The controlled lighting arrangement as claimed in claim 5, wherein said predetermined time period and said pre-determined illumination intensity are fixed.
9. The controlled lighting arrangement as claimed in claim 1, wherein said predetermined illumination intensity of the lighting arrangement gradually diminished from said pre-determined illumination intensity.
10.The controlled lighting arrangement as claimed in claim 1, wherein said controller is adapted to detect the level of charge in the battery, said predetermined illumination intensity being variable corresponding to said level of charge in the battery.
11.The controlled lighting arrangement as claimed in claim 1, wherein said controller is adapted to receive input from at least one sensor corresponding to the external environmental lighting conditions, said received input being adapted to prompt the driver of the vehicle to operate the lighting arrangement corresponding to the external environmental lighting conditions.