Description:FORM 2
THE PATENTS ACT, 1970
(39 OF 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[Refer Section 10, Rule 13]

TITLE OF INVENTION
Lighting System of a Vehicle and Method for Varying Intensity of Light Emitted

APPLICANT
TVS MOTOR COMPANY LIMITED, an Indian company, having its address at “Chaitanya”, No.12 Khader Nawaz Khan Road, Nungambakkam, Chennai 600 006, Tamil Nadu, India.

PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed.

 
FIELD OF THE INVENTION
[001] The present invention generally relates to a lighting system of a vehicle and particularly relates to a method for varying an intensity of light emitted by a lamp unit of the lighting system of the vehicle.

BACKGROUND OF THE INVENTION
[002] Conventionally, lamps or lights of vehicles are operated by an ON/OFF switch. When the lamp is turned ON it emits light at a pre-set intensity or brightness. It is desirable that a headlamp of the vehicle may be adapted to emit light at varied intensity or brightness depending on driving conditions. For e.g., when the vehicle is driven at high speed it is desirable to have greater brightness and greater throw of light from the headlamp to allow for proper visibility of the road. Under high speed the vehicle crosses distances very fast and consequently time available for a user to react to threats or dangerous road conditions substantially decreases. Therefore, it helps to have greater visibility for longer distances when the vehicle is driven fast in poorly lit conditions. Similarly, it is desirable to have decreased intensity or brightness for light emitted by the headlamp when the vehicle is moving at a slow pace is or is just idling. In this situation, when there are limited perceived safety concerns, a lower intensity or brightness of light emitted by the headlamp allows for decreased power consumption and increased efficiency for the vehicle. Having the headlamp operate at high intensity and brightness continuously increases heat emitted by the headlamp and the lighting system would have to employ a complex, costly and bulky thermal management system for effective heat dissipation.
[003] With development in lamp technology, adaptive lighting is being increasingly used in automobiles. Adaptive lighting is especially suited for vehicle headlamps, whereby the headlamp intensity or brightness is varied depending on ambient conditions like environmental lighting available, oncoming traffic, etc. Adaptive lighting is also employed to switch between a low beam and a high beam of the headlamp in many cases. Adaptive lighting for the headlamp enhances the user’s comfort and convenience, and allows for safer driving in dimly lit conditions.
[004] However, when compared to conventional headlamps adaptive headlamps require specific additional components to compute and control operation of the headlamp. Thus, sensors to estimate ambient and vehicular conditions and processors or microcontrollers to asses the data collected and control operation of the headlamp need to be employed. These additional components increase cost of lighting system of the vehicle.
[005] Thus, there is a need in the art for a lighting system of a vehicle and a method thereof which addresses at least the aforementioned problems and limitations.

SUMMARY OF THE INVENTION
[006] In one aspect, the present invention is directed to a lighting system of a vehicle. The lighting system includes a lamp unit adapted to illuminate a road, a driver module which supplies an input signal to control the lamp unit, and a lamp switch for switching between an ON state and an OFF state the lamp unit. In an adaptive mode of the lighting system, a control unit is adapted to receive a speed of the vehicle, generate and communicate a control signal to the driver module to increase an intensity of light emitted by the lamp unit to a first predefined value, if the lamp unit is in the ON state and the speed of the vehicle is increased beyond a first predefined threshold limit, and generate and communicate the control signal to the driver module to decrease the intensity of light emitted by the lamp unit to a second predefined value, if the lamp unit is in the ON state and the speed of the vehicle is decreased beyond a second predefined threshold limit.
[007] In an embodiment, the decrease in intensity of light emitted by the lamp unit to the second predefined value is directly proportional to the decrease in speed when the lighting system is in the adaptive mode.
[008] In an embodiment, in the adaptive mode of the lighting system, the control unit is adapted to generate and communicate the control signal to the driver module to maintain the lamp unit in the OFF state, if the lamp unit is in the OFF state.
[009] In another embodiment, in a manual mode of the lighting system, the control unit is adapted to generate and communicate the control signal to the driver module to maintain the intensity of light emitted by the lamp unit at a third predefined value, if the lamp unit is in the ON state, and generate and communicate the control signal to the driver module to maintain the lamp unit in the OFF state, if the lamp unit is in the OFF state.
[010] In yet another embodiment, in the adaptive mode and the manual mode of the lighting system, the driver module is adapted to supply the input signal to the lamp unit to maintain the intensity of light emitted by the lamp unit at a maximum intensity of the lamp unit, if the control signal is not received by the driver module and the lamp unit is in the ON state. In a further embodiment, the driver module is adapted to stop supplying the input signal to the lamp unit, to maintain the lamp unit in the OFF state, if the control signal is not received by the driver module and the lamp unit is in the OFF state.
[011] In an embodiment, the lighting system of the vehicle includes a second switch for switching between the adaptive mode and the manual mode.
[012] In an embodiment, the control signal generated and communicated by the control unit to the driver module and the input signal supplied by the driver module to control the lamp unit are Pulse Width Modulation (PWM) signals.
[013] In an embodiment, the ON state of the lamp unit includes a low beam mode and a high beam mode. In another embodiment, the lamp switch is adapted to change between the low beam mode and the high beam mode.
[014] In an embodiment, the control unit is a control unit of an instrument cluster of the vehicle. In another embodiment, the control unit receives the speed of the vehicle from a Vehicle Control unit (VCU).
[015] In an embodiment, the lamp unit includes a cluster of Light Emitting Diodes (LEDs).
[016] In another aspect, the present invention is directed to a method for varying an intensity of light emitted by a lamp unit of a lighting system of a vehicle. The lighting system includes a driver module adapted to supply an input signal to control the lamp unit, a lamp switch for switching between an ON state and an OFF state of the lamp unit, and a control unit. The method includes the steps of receiving by the control unit a speed of the vehicle and generating and communicating by the control unit to the driver module a control signal to increase an intensity of light emitted by the lamp unit to a first predefined value, if the lighting system is in an adaptive mode, the lamp unit is in the ON state and the speed of the vehicle is increased beyond a first predefined threshold limit. The method further includes the step of generating and communicating by the control unit to the driver module the control signal to decrease the intensity of light emitted by the lamp unit to a second predefined value, if the lighting system is in the adaptive mode, the lamp unit is in the ON state and the speed of the vehicle is decreased beyond a second predefined threshold limit.
[017] In an embodiment, the method includes the step of generating and communicating by the control unit to the driver module the control signal to maintain the intensity of light emitted by the lamp unit at a third predefined value, if the lighting system is in a manual mode and the lamp unit is in the ON state.
[018] In another embodiment, the method includes the step of generating and communicating by the control unit to the driver module the control signal to maintain the lamp unit in the OFF state, if the lighting system is in the adaptive mode or the manual mode and the lamp unit is in the OFF state.
[019] In yet another embodiment, the method includes the steps of supplying by the driver module to the lamp unit the input signal to maintain the intensity of light emitted by the lamp unit at a maximum intensity of the lamp unit, if the lighting system is in the adaptive mode or the manual mode, the control signal is not received by the driver module and the lamp unit is in the ON state, and stop supplying by the driver module to the lamp unit the input signal to maintain the lamp unit in the OFF state, if the lighting system is in the adaptive mode or the manual mode, the control signal is not received by the driver module and the lamp unit is in the OFF state.

BRIEF DESCRIPTION OF THE DRAWINGS
[020] Reference will be made to embodiments of the invention, examples of which may be illustrated in accompanying figures. These figures are intended to be illustrative, not limiting. Although the invention is generally described in context of these embodiments, it should be understood that it is not intended to limit the scope of the invention to these particular embodiments.
Figure 1 illustrates a block diagram of an exemplary lighting system of a vehicle, in accordance with an embodiment of the present invention.
Figure 2 illustrates a method for varying an intensity of light emitted by a lamp unit of the lighting system of the vehicle, in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION
[021] Various features and embodiments of the present invention here will be discernible from the following further description thereof, set out hereunder. It is contemplated that the disclosure in the present invention may be applied to any type of lighting system capable of accommodating the present subject matter without defeating the scope of the present invention.
[022] The present invention generally relates to a lighting system 100 of a vehicle 10 and particularly relates to a method 200 for varying an intensity of light emitted by a lamp unit 110 of the lighting system 100 of the vehicle 10.
[023] Figure 1 illustrates a block diagram of an exemplary lighting system 100 of a vehicle 10, in accordance with an embodiment of the present subject matter. The lighting system 100 includes a lamp unit 110, a driver module 120 and a lamp switch 130. The lamp unit 110 is adapted to illuminate a road or terrain on which the vehicle 10 is driven. The lamp unit 110 may be one or more of a headlamp or a fog lamp of the vehicle 10 or any other lamp of the vehicle 10 capable of accommodating the present subject matter. In an embodiment, the lamp unit 110 includes a cluster of Light Emitting Diodes (LEDs). The driver module 120 supplies an input signal to control the lamp unit 110. In an embodiment, the input signal supplied by the driver module 120 to control the lamp unit 110 is a Pulse Width Modulation (PWM) signal. The PWM signal determines how long the lamp unit 110 emits light and stops emitting light in a given time period. The lamp switch 130 is adapted to switch the lamp unit 110 between an ON state and an OFF state. Therefore, when the lamp switch 130 is flipped on, the driver module 120 supplies an input signal to control the lamp unit 110 to emit light at a predefined intensity and brightness. In an embodiment, when the lamp switch 130 is flipped off, the driver module 120 stops supplying the input signal to control the lamp unit 110 and thereby the lamp unit 110 does not emit any light. In another embodiment, lamp unit 110 includes a low beam mode and a high beam mode. The low beam mode allows for light emitted from the lamp unit 110 to illuminate an area of the road close to the vehicle 10. This is useful in slow speeds of the vehicle 10 as it saves power by restricting the brightness of the lamp unit 110 and prevents glare on oncoming traffic enhancing overall road safety. The high beam mode consumes more power as the lamp unit 110 is operated at a higher intensity for light to traverse a greater distance and is useful to enable a user of the vehicle 10 to see far ahead on the road when going at higher speeds. The low beam mode and the high beam mode are enabled in the ON state of the lamp unit 110. In an embodiment, the lamp switch 130 is adapted to change between the low beam mode and the high beam mode of the lamp unit 110.
[024] A control unit 140 is adapted to transmit a control signal to the driver module 120. The driver module 120 determines the value of the input signal supplied by it to control the lamp unit 110 to emit light at a predefined intensity and brightness based on the control signal received from the control unit 140. In an embodiment, the control signal generated and communicated by the control unit 140 to the driver module 120 is a Pulse Width Modulation (PWM) signal. Since microcontrollers are expensive, it is desirable not to have a dedicated microcontroller to act as the control unit 140 in the lighting system 100. Any processor in the vehicle 10 can be adapted to perform the functions of the control unit 140. In an embodiment, the control unit 140 is a control unit of an instrument cluster of the vehicle 10. The control unit of the instrument cluster is in proximity to both the lamp unit 110 and the lamp switch 130. Further, the control unit of the instrument cluster will also have some additional capacity to perform the functions to vary the intensity of light emitted by the lamp unit 110 of the lighting system 100. This allows for part reduction and cost reduction.
[025] The lighting system 100 includes an adaptive mode and a manual mode. In the adaptive mode, the control unit 140 generates and transmits the control signal to the driver module 120 to vary the intensity of light emitted by the lamp unit 110 based on a speed of the vehicle 10, when the lamp unit 110 is in the ON state. In the manual mode, the control unit 140 generates and transmits the control signal to the driver module 120 to maintain the intensity of light emitted by the lamp unit 110 at a suitable predefined value, when the lamp unit 110 is in the ON state. When the lamp unit 110 is in the OFF state, the driver module 120 maintains the lamp unit 110 in the OFF state and no light is emitted. In an embodiment, the lighting system 100 includes a second switch 150 configured to switch between the adaptive mode and the manual mode. Thus, a user may at one’s discretion put the lighting system 100 in the adaptive mode or the manual mode as per requirement. In an embodiment, the control unit 140 receives the speed of the vehicle 10 from a Vehicle Control unit (VCU). When the control unit of the instrument cluster is the control unit 140, there are no separate cables necessary to communicate speed data from the VCU, as this data is anyway communicated to be displayed in the instrument cluster.
[026] Figure 2 illustrates a method 200 for varying the intensity of light emitted by the lamp unit 110 of the lighting system 100 of the vehicle 10, in accordance with an embodiment of the present subject matter. At step 204 of the method 200, the control unit 140 receives the speed of the vehicle 10. In the illustrated embodiment, the speed of the vehicle 10 is received from the VCU. The control unit 140 then determines whether the lighting system 100 is in the adaptive mode or the manual mode. The control unit 140 further determines whether the lamp unit 110 is in the ON state or the OFF state. At step 206 of the method 200, if the lighting system 100 is in the adaptive mode and the lamp unit 110 is in the ON state and the speed of the vehicle 10 is increased beyond a first predefined threshold limit, the control unit 140 generates and communicates the control signal to the driver module 120 to increase the intensity of light emitted by the lamp unit 110 to a first predefined value. In an embodiment, the speed of the vehicle is classified into a number of speed ranges. Each speed range is associated with a particular predefined intensity or brightness of light emitted by the lamp unit 110. As and when the vehicle 10 crosses a lower threshold value of each speed range the intensity or brightness of light emitted by the lamp unit 110 is increased to the corresponding predefined intensity or brightness associated with said speed range. At step 208 of the method 200, if the lighting system 100 is in the adaptive mode and the lamp unit 110 is in the ON state and the speed of the vehicle 10 is decreased beyond a second predefined threshold limit, the control unit 140 generates and communicates the control signal to the driver module 120 to decrease the intensity of light emitted by the lamp unit 110 to a second predefined value. Thus, when the speed of the vehicle 10 is increased the light emitted by the lamp unit 110 has a greater brightness for illuminating the road better and when the speed of the vehicle 10 is decreased the light emitted by the lamp unit 110 has a lower brightness. Thus, the best of road safety and power saving are achieved by the lighting system 100 in the adaptive mode. In the aforementioned embodiment, where each speed range is associated with a particular predefined intensity or brightness of light emitted by the lamp unit 110, as and when the vehicle 10 crosses a higher threshold value of each speed range during deceleration, the intensity or brightness of light emitted by the lamp unit 110 is decreased to the corresponding predefined intensity or brightness associated with said speed range. In an embodiment, the decrease in intensity of light emitted by the lamp unit 110 to the second predefined value is directly proportional to the decrease in speed in the adaptive mode of the lighting system 100.
[027] At step 210 of the method 200, if the lighting system 100 is in the manual mode and the lamp unit 110 is in the ON state, the control unit 140 generates and communicates the control signal to the driver module 120 to maintain the intensity of light emitted by the lamp unit 110 at a third predefined value. In an embodiment, the third predefined value for the intensity of light emitted by the lamp unit 110 is dictated by a PWM value of 80 percent provided by the input signal from the driver module 120 to the lamp unit 110. At step 212 of the method 200, if the lamp unit 110 is in the OFF state and irrespective of whether the lighting system 100 is in the adaptive mode or the manual mode, the control unit 140 generates and communicates the control signal to the driver module 120 to maintain the lamp unit 110 in the OFF state. In an embodiment, if the lighting system 100 is in the manual mode, the control unit 140 desists from transmitting any signal to the driver module 120, and the driver module 120 is adapted to maintain the intensity of light emitted by the lamp unit 110 at the third predefined value if the lamp unit 110 is in the ON state, i.e., the lamp switch 130 is flipped on and maintain the lamp unit 110 in the OFF state if the lamp switch 130 is flipped off.
[028] In an embodiment, a failure mode is provided for the lighting system 100. The failure mode allows for the lamp unit 110 to operate and emit light when the lamp switch 130 is flipped on even if there is a malfunction in the control unit 140 or in signal cables from the control unit 140 to the driver module 120. Thus, even if the control signal from the control unit 140 is not received by the driver module 120, the lamp unit 110 can still be operated thereby avoiding safety concerns. In another embodiment, the failure mode is provided only for the adaptive mode of the lighting system 100. In yet another embodiment, the failure mode is provided for both the adaptive mode and the manual mode of the lighting system 100. At step 214 of the method 200, if the lighting system 100 is in the adaptive mode or the manual mode and the control signal is not received by the driver module 120 and the lamp unit 110 is in the ON state, the driver module 120 supplies the input signal to the lamp unit 110 to maintain the intensity of light emitted by the lamp unit 110 at a maximum intensity of the lamp unit 110. In an embodiment, the maximum intensity of light emitted by the lamp unit 110 is dictated by a PWM value of 100 percent provided by the input signal from the driver module 120 to the lamp unit 110. Illumination of the lamp unit 110 at its peak brightness is also a means to alert the user and/or a technician of a fault in the control unit 140 or in signal cables from the control unit 140 to the driver module 120. Once the fault is detected necessary servicing can be done. At step 216 of the method 200, if the lighting system 100 is in the adaptive mode or the manual mode and the control signal is not received by the driver module 120 and the lamp unit 110 is in the OFF state, the driver module 120 stops supplying the input signal to the lamp unit 110 by which the lamp unit 110 is maintained in the OFF state.
[029] Advantageously, the present claimed invention provides a lighting system of a vehicle and a method for varying an intensity of light emitted by a lamp unit of the lighting system of the vehicle. The claimed configurations of the system and the method for varying the intensity of light emitted by the lamp unit of the lighting system as discussed above are not routine, conventional, or well understood in the art, as the claimed configurations of the system and the method for varying the intensity of light emitted by the lamp unit of the lighting system enable the following solutions to the existing problems in conventional technologies. The lighting system and the method thereof enables cost reduction of the vehicle by efficient resource utilization. The system does not require any additional microcontrollers or FPGAs for computation to vary the intensity of light emitted by the lamp unit, as the system utilizes the control unit of the instrument cluster for this purpose. Since use of extra components are avoided, extra cost of system and extra space required to house the system can be limited. Thermal management is a critical aspect of any lighting system as it decides size, weight and cost of the system. Major contributor to temperature rise of the lighting system is current running in the lamp unit and the driver unit. In the adaptive mode of the lighting system a current control method is employed by varying the intensity of light emitted by the lamp unit based on environmental conditions, which allows the lamp unit to be operated at optimal conditions and keeps the total heat dissipation at optimal levels. In the adaptive mode, the lamp unit consumes power based on the speed of the vehicle which lowers the average operational power consumption of the lighting system and reduces load on an engine dynamo. Hence, total torque requirement from a power unit of the vehicle also decreases thereby increasing fuel efficiency of the vehicle. Lower fuel consumption leads to lower carbon emissions in internal combustion engine vehicles and avoids energy wastage. Further, when driving at high speeds, a certain distance is covered in a shorter period of time and a long-range perception of the road is required for safe driving. Thus, throw and intensity of light emitted by the lamp unit should illuminate the road over a long range during high speeds. When driving at low speeds, long range throw and higher intensity of light emitted by the lamp unit is not required. Hence, extra power that needs to be supplied to the lamp unit can be lowered down when driving at slow speeds. Since, intensity of light emitted by the lamp unit is controlled based on the speed of the vehicle, a good balance between safety and efficiency is maintained.
[030] While the present invention has been described with respect to certain embodiments, it will be apparent to those skilled in the art that various changes and modification may be made without departing from the scope of the invention as defined in the following claims.

List of Reference Numerals:
10 - Vehicle
100 - Lighting system of the vehicle
110 - Lamp unit
120 - Driver module
130 - Lamp switch
140 - Control unit
150 - Second switch
, Claims:WE CLAIM:
1. A lighting system (100) of a vehicle (10), the lighting system (100) comprising:
a lamp unit (110), the lamp unit (110) being configured to illuminate a road;
a driver module (120), the driver module (120) being configured to supply an input signal to control the lamp unit (110); and
a lamp switch (130), the lamp switch (130) being configured to switch the lamp unit (110) between an ON state and an OFF state;
wherein, in an adaptive mode of the lighting system (100), a control unit (140) being configured to:
receive a speed of the vehicle (10);
generate and communicate a control signal to the driver module (120) to increase an intensity of light emitted by the lamp unit (110) to a first predefined value, if the lamp unit (110) is in the ON state and the speed of the vehicle (10) is increased beyond a first predefined threshold limit; and
generate and communicate the control signal to the driver module (120) to decrease the intensity of light emitted by the lamp unit (110) to a second predefined value, if the lamp unit (110) is in the ON state and the speed of the vehicle (10) is decreased beyond a second predefined threshold limit.
2. The lighting system (100) of the vehicle (10) as claimed in claim 1, wherein in the adaptive mode of the lighting system (100), the decrease in intensity of light emitted by the lamp unit (110) to the second predefined value is directly proportional to the decrease in speed.

3. The lighting system (100) of the vehicle (10) as claimed in claim 1, wherein in the adaptive mode of the lighting system (100), the control unit (140) being configured to generate and communicate the control signal to the driver module (120) to maintain the lamp unit (110) in the OFF state, if the lamp unit (110) is in the OFF state.

4. The lighting system (100) of the vehicle (10) as claimed in claim 1, wherein in a manual mode of the lighting system (100), the control unit (140) is configured to:
generate and communicate the control signal to the driver module (120) to maintain the intensity of light emitted by the lamp unit (110) at a third predefined value, if the lamp unit (110) is in the ON state; and
generate and communicate the control signal to the driver module (120) to maintain the lamp unit (110) in the OFF state, if the lamp unit (110) is in the OFF state.

5. The lighting system (100) of the vehicle (10) as claimed in claim 4, wherein in the adaptive mode and the manual mode of the lighting system (100), the driver module (120) is configured to:
supply the input signal to the lamp unit (110) to maintain the intensity of light emitted by the lamp unit (110) at a maximum intensity of the lamp unit (110), if the control signal is not received by the driver module (120) and the lamp unit (110) is in the ON state; and
stop supplying the input signal to the lamp unit (110), to maintain the lamp unit (110) in the OFF state, if the control signal is not received by the driver module (120) and the lamp unit (110) is in the OFF state.

6. The lighting system (100) of the vehicle (10) as claimed in claim 5 comprising a second switch (150) configured to switch between the adaptive mode and the manual mode.

7. The lighting system (100) of the vehicle (10) as claimed in claim 1, wherein the control signal generated and communicated by the control unit (140) to the driver module (120) and the input signal supplied by the driver module (120) to control the lamp unit (110) are Pulse Width Modulation (PWM) signals.

8. The lighting system (100) of the vehicle (10) as claimed in claim 1, wherein the ON state of the lamp unit (110) comprises a low beam mode and a high beam mode, and the lamp switch (130) being configured to change between the low beam mode and the high beam mode.

9. The lighting system (100) of the vehicle (10) as claimed in claim 1, wherein the control unit (140) comprises a control unit of an instrument cluster of the vehicle (10).

10. The lighting system (100) of the vehicle (10) as claimed in claim 1, wherein the control unit (140) receives the speed of the vehicle (10) from a Vehicle Control unit (VCU).

11. The lighting system (100) of the vehicle (10) as claimed in claim 1, wherein the lamp unit (110) comprises a cluster of Light Emitting Diodes (LEDs).

12. A method (200) for varying an intensity of light emitted by a lamp unit (110) of a lighting system (100) of a vehicle (10), the lighting system (100) comprising a driver module (120) configured to supply an input signal to control the lamp unit (110), and a lamp switch (130) configured to switch the lamp unit (110) between an ON state and an OFF state, the method (200) comprising the steps of:
receiving (204), by a control unit (140), a speed of the vehicle (10);
generating and communicating (206), by the control unit (140) to the driver module (120), a control signal to increase an intensity of light emitted by the lamp unit (110) to a first predefined value, if the lighting system (100) is in an adaptive mode, the lamp unit (110) is in the ON state and the speed of the vehicle (10) is increased beyond a first predefined threshold limit; and
generating and communicating (208), by the control unit (140) to the driver module (120), the control signal to decrease the intensity of light emitted by the lamp unit (110) to a second predefined value, if the lighting system (100) is in the adaptive mode, the lamp unit (110) is in the ON state and the speed of the vehicle (10) is decreased beyond a second predefined threshold limit.

13. The method (200) as claimed in claim 12 comprising the step of generating and communicating (210), by the control unit (140) to the driver module (120), the control signal to maintain the intensity of light emitted by the lamp unit (110) at a third predefined value, if the lighting system (100) is in a manual mode and the lamp unit (110) is in the ON state.

14. The method (200) as claimed in claim 12 comprising the step of generating and communicating (212), by the control unit (140) to the driver module (120), the control signal to maintain the lamp unit (110) in the OFF state, if the lighting system (100) is in the adaptive mode or the manual mode and the lamp unit (110) is in the OFF state.

15. The method (200) as claimed in claim 14 comprising the steps of:
supplying (214), by the driver module (120) to the lamp unit (110), the input signal to maintain the intensity of light emitted by the lamp unit (110) at a maximum intensity of the lamp unit (110), if the lighting system (100) is in the adaptive mode or the manual mode, the control signal is not received by the driver module (120) and the lamp unit (110) is in the ON state;
stop supplying (216), by the driver module (120) to the lamp unit (110), the input signal, to maintain the lamp unit (110) in the OFF state, if the lighting system (100) is in the adaptive mode or the manual mode, the control signal is not received by the driver module (120) and the lamp unit (110) is in the OFF state.

Dated this 08th day of September 2022

TVS MOTOR COMPANY LIMITED
By their Agent & Attorney

(Nikhil Ranjan)
of Khaitan & Co
Reg No IN/PA-1471