FORM 2
THE PATENT ACT, 1970,
(39 OF 1970)
&
THE PATENTS RULE, 2003
COMPLETE SPECIFICATION
(SEE SECTION 10; RULE 13)
"REMOTE OPERATED AUTOMATIC LIGHTING SYSTEM FOR MOTOR
VEHICLE"
MAHINDRA & MAHINDRA LIMITED
AN INDIAN COMPANY,
R&D CENTER, AUTOMOTIVE SECTOR,
89, M.I.D.C., SATPUR,
NASHIK-422 007,
MAHARASHTRA, INDIA.
THE FOLLOWING SPECIFICATION DESCRIBES THE NATURE OF THE INVENTION AND MANNER IN WHICH IT IS TO BE PERFORMED

FIELD OF THE INVENTION:-
The present invention relates to motor vehicle safety and convenience system that includes the automatic detection of day/night condition through rain and Light detection sensor and provide the head lamp output at the time of required condition. The unique approach is to identify the light condition and with the vehicle having the Rain and light detection system with the control of headlamp through Body Control Module. The feature used to enhance the safety of the passensor when ever he/she approaching the near by destination in the dark.
BACKGROUND AND PRIOR ART SEARCH:-
In the present scenarios the lighting system either control through drive by wire or the control system control the vehicle Lighting system, in particular for Motor vehicles, and method of Generating a light beam of desired Shape. Patent No. US6558031 is the approach to by a collector which surrounds the light source at least partly and is guided further to a separator of optical waveguide material, which separator forms a desired light beam via a specially shaped light outlet surface so as to obtain as high as possible a light output.
Patent No. US005449974 describes a combination windshield wiper/vehicle lighting system in which the head, tail and parking lights can be automatically activated when the windshield wipers are activated. A time-delay on device within the system causes the vehicle lights to be delay activated a short time after the windshield wipers are activated. Further, the present system includes the ability to retain the lights on once the windshield wipers have been deactivated. Ordinary function of the windshield wipers and vehicle lights is not impeded by the system of the present invention.
Patent application No. US005130905 discloses combined Head Light and Windshield control system. Normally FMH, LMV can be done with vehicle input parameters. The LMV operation assumption of vehicle is in OFF timings (say calculation of OFF time 5hrs /6hrs after it's switched OFF). High efficient

Prediction processing device and memory is required to control the output through out time when vehicle in park condition. If it is operating with the vehicle battery malfunction with respect to other sub system inputs, there is a chance of deterioration of life of the vehicle battery.
OBJECTS OF THE PRESENT INVENTION:-
The main object of the present invention is to provide a remote operated automatic lighting system.
Another object of the present invention is to provide a remote operated automatic lighting system wherein the system recognizes the intensity of natural light and activates only in the dark / night conditions.
Still another object of the present invention is to provide vehicle safety and convenience system that includes the automatic detection of day/night condition through rain and Light detection sensor and provides the head lamp output at the time of required condition.
Accordingly the invention provides A remote operated automatic lighting system for motor vehicle comprising microprocessor in communication with remote key/trigger switch through a radio frequency communication module; a rain/light sensor, mounted on the windscreen of vehicle, connected to said processor through local interconnect network; the head lamps of the vehicle connected to the processor through hardwire connection; the processor is programmed with an embedded software to operate the system in such way that when RF signals received from remote key/trigger switch the sensor of the system is activated to sense the intensity of natural light and sends the feedback to the processing unit through the LIN communication protocol whether the intensity of natural light is below the desired limit indicating dark situation, and thereby the feedback received from sensor is processed by the processing unit as herein illustrated with figures of flow diagram and

automatically switch ON the headlamps of the vehicfe which assist the user to find his path in the dark.
BRIEF DESCRIPTION OF THE FIGURES:-
Figure 1 shows block diagram illustrating the components of the system and communication between the modules in accordance with the present invention.
Figure 2 is the timing diagram illustrating about all the data of the system in which the event is happening.
Figure 3 is the operating flowchart illustrating the follow me home functioning of the system.
Figure 4 is the operating flowchart illustrating the lead me to the vehicle functioning of the system.
DETAILED DESCRIPTION OF THE PRESENT INVENTION:-
Referring to figure 1, remote operated automatic lighting system (1) comprises of a remote key / trigger switch (2), processing unit (3), sensor (4) and headlamp (5) of a motor vehicle. The remote key / trigger switch (2) is incorporated in the ignition key of the vehicle. The signal processing unit (3) is mounted inside the vehicle selectively under the dash panel. The sensor (4) is dual sensor which senses rain intensity and the intensity of the natural light. The sensor (4) is mounted at the upper portion on the windscreen of a vehicle.
The remote key (2) of the system is connected to processing unit (3) through radio frequency (RF) communication (6) module. Rain / light sensor (4) is connected to the processing unit through Local Interconnect Network (LIN) communication protocol (7). LIN protocol is a single wire bidirectional communication and consumes less power from the battery for communication.

It has the characteristics of operating / communicating during the ignition OFF condition and/or battery cut off condition. The processing unit (3) of the system is configured to accept any kind communication protocol such as LIN, RF, KWP (key word protopol), hardwire connection and like means. The specified baud rate of the processing unit and sensor will communicate each other when the ignition switch of the vehicle is in OFF condition. Baud rate is the unit of rate at which the communication through LIN takes place. The headlamps (5) of the vehicle are connected to the processor unit through hardwire connections (8). The processing unit (3) of the system has inbuilt diagnostic headlamp shot to the battery or ground. This feature of the processing unit helps to diagnose the fault in case of failure of the system. The processing unit has internal memory for storage of operating data. This feature of the system assists the end user to retrieve the past data whenever it is required.
The head lamps are connected to the processor through an interface such as digital to analog converter.
Referring to figure 2 switching on remote/trigger key pressed ignition lis ON for short period- There after ignition is off. The sensor shows in day condition sensitivity light is high. The sensor sensitivity in night condition is low.
Remote key (RKE) is pressed if rain light sensor (RLS) output is high (detection of day condition) head light are OFF and if rain light sensor (RLS) out put is low (detection of night condition head light is ON.
Referring to figure 3 and 4, the system as disclosed in the present invention performs two way functions namely follow me home (FMH) and lead me to the vehicle (LMV) when the user is leaving from the vehicle and approaching to the vehicle respectively. When the user comes home late in the dark and parks his vehicle, it becomes very inconvenient to him to find the way to his home in the dark. At this moment, the user presses the remote key / trigger in the ignition key, which sends the radio frequency signal to the processing unit of the system. The processing unit processes the RF signal and activate the sensor

of the system. The sensor unit senses the intensity of natural light and sends the feedback to the processing unit through the LIN communication protocol. If the intensity of natural light is below the desired limit indicating dark situation, the system is activated automatically. The feedback received from sensor is processed by the processing unit and it automatically switch ON the headlamps of the vehicle which assist the user to find his path in the dark. Flow
Similarly when the end user want to identify his vehicle parked in the dark, he will press the remote key in the ignition switch by way of which the system gets activated and the headlamps of the vehicle glows automatically. Thus, the system assist the user to lead him to the vehicle.
The processing unit can get the trigger/input through either the manual intervention through remote key and other inputs from the vehicle itself such as park lamp is in OFF position, ignition key removed, vehicle door open, etc.
ADVANTAGES OF THE PRESENT INVENTION:-
1. The system design is robust and performs better thereby assisting the end user.
2. It is an unique communication between the processing unit and sensors via LIN protocol and signal exchange at universal baud rate.
3. The system has diagnosing feature in case of failure of the system.
4. The system has data storage facility by way of which past operations records of the system can be retrieved as and when required.

WE CLAIM:-
1. A remote operated automatic lighting system for motor vehicle comprising microprocessor in communication with remote key/trigger switch through a radio frequency communication module; a rain/light sensor, mounted on the windscreen of vehicle, connected to said processor through local interconnect network; the head lamps of the vehicle connected to the processor through hardwire connection; wherein the processor is embedded with programmed with software to operate the system in such way that when RF signals received from remote key/trigger switch the sensor of the system is activated to sense the intensity of natural light and sends the feedback to the processing unit through the LIN communication protocol whether the intensity of natural light is below the desired limit indicating dark situation, and thereby the feedback received from sensor is processed by the processing unit as herein illustrated with figures of flow diagram and automatically switch ON the headlamps of the vehicle which assist the user to find his path in the dark.
2. The lighting system as claimed in claim 1 wherein the Said remote key/trigger switch incorporated in the ignition key of the vehicle.
3. The lighting system as claimed in claim 1 and 2 wherein the said sensor is dual sensor for light and rain sensor (RLS).
4. The lighting system as claimed in claims 1 to 3 wherein the said head lamps are connected hard wire to processor through an interface.
5. The lighting system as claimed in claim 4 wherein the said interface is digital to anolog converter.