FORM 2
THE PATENTS ACT 1970
[39 OF 1970]
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10; rule 13]
TITLE: “A HEATER ASSEMBLY FOR A HEADLAMP UNIT AND A METHOD OF DE-FOGGING THEREOF”
Name and Address of the Applicant: TATA MOTORS LIMITED having its
address at: Bombay House, 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001, Maharashtra, India.
Nationality: Indian
The following specification particularly describes the invention and the manner in which it is to be performed.

TECHNICAL FIELD
Present disclosure, in general, relates to a field of automobiles. Particularly, but not exclusively, the present disclosure relates to headlamp units for vehicles. Further, embodiments of the present disclosure relate to a heater assembly for the headlamp unit of the vehicle for de-fogging the headlamp.
BACKGROUND OF THE DISCLOSURE
Most automobiles include one or more vehicle headlamps and one or more tail lamps. Lamps that use incandescent or HID bulbs, for example, generate sufficient radiation, particularly in the non-visible spectrum, so that in colder conditions, moisture in the form of condensation, rain, sleet, or snow does not form ice on the lamps, which would reduce optical transmission through lens of the lamps. Some lamps that use LEDs for illumination do not generate sufficient radiation to melt snow and ice from the lighting system lens and hence result in obstruction of light.
Since automobile lamp has functions of illuminating a road surface ahead, guiding the vehicle to travel, warning pedestrians and to warn vehicles behind, the illumination performance of the automobile lamp is crucial. But, such formation of ice and/or condensation of moisture on the cover of the automotive lamp tampers with the transmission of light. Conventional headlamps often include one or more fans within the headlamp unit which blow air to remove condensation. However, such configurations are complex and the air-flow may be affected by the profile of the headlamp cover, resulting in inefficient removal of condensation. Further, such configuration may consume time to remove the condensation completely, which is not desirable.
The present disclosure is directed to overcome one or more limitations stated above or any other limitations associated with the conventional mechanisms.
SUMMARY OF THE DISCLOSURE
One or more shortcomings of the prior art are overcome by a heater assembly and a method as claimed and additional advantages are provided the heater assembly

and the method as claimed in the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.
In one non-limiting embodiment of the present disclosure a heater assembly for a headlamp unit is disclosed. The heater assembly comprises at least one heating element disposable along an inner periphery of at least one cover member of the headlamp unit. The heater assembly comprises one or more first sensors disposable in the headlamp unit, where the one or more first sensors are configured to sense moisture build up on the at least one cover member. The heater assembly includes a control unit communicatively coupled to the one or more first sensors. The control unit is configured to receive an input signal from the one or more first sensors on build-up of moisture. The control unit activates the at least one heating element to dissipate heat onto the at least one cover member.
In an embodiment, the one or more first sensors is configured to sense temperature and humidity in the headlamp unit.
In an embodiment, the at least one heating element is communicatively coupled to one or more second sensors disposed in the vehicle.
In an embodiment, the one or more second sensors are configured to sense moisture content value outside the headlamp unit.
In another non-limiting embodiment of the present disclosure, a headlamp unit is disclosed. The headlamp unit comprises at least one reflector, and at least one light source configured to be received within the at least one reflector. The headlamp unit comprises at least one cover member configured to provide ingress protection to the at least one reflector and the at least one light source. The headlamp unit comprises a heater assembly, where the heater assembly comprises at least one heating element disposable along an inner periphery of at least one cover member of the headlamp unit. The heater assembly comprises one or more first sensors

disposable in the headlamp unit, where the one or more first sensors are configured to sense moisture build up on the at least one cover member. The heater assembly includes a control unit communicatively coupled to the one or more first sensors. The control unit is configured to receive an input signal from the one or more first sensors on build-up of moisture. The control unit activates the at least one heating element to dissipate heat onto the at least one cover member.
In another non-limiting embodiment of the present disclosure, a method of de-fogging a headlamp unit by a heater assembly is disclosed. The method includes the steps of receiving, by a control unit, at least one first signal corresponding to moisture content in the headlamp unit from one or more first sensors. The one or more first sensors are communicatively coupled to the control unit. The control unit then, compares moisture content value with a threshold value. The control unit is configured to determine condensation within the headlamp unit based on comparison of first threshold value and moisture content value. The control unit actuates the at least one heating element disposed on an inner periphery of the headlamp unit to dissipate heat.
In an embodiment, the method comprises receiving, by the control unit, at least one second signal corresponding to moisture content outside the headlamp unit from one or more second sensors communicatively coupled to the control unit. The control unit compares the moisture content value outside the headlamp unit from the at least one second signal. The control unit, then, determines condensation within the headlamp unit based on comparison for activating the at least one heating element.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The novel features and characteristic of the disclosure are set forth in the appended claims. The disclosure itself, however, as well as a preferred mode of use, further objectives and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying figures. One or more embodiments are now described, by way of example only, with reference to the accompanying figures wherein like reference numerals represent like elements and in which:
Figure 1a is a block diagram of a heater assembly for a headlamp unit, in accordance with an embodiment of the present disclosure.
Figure 1b is a front view of the headlamp unit of a vehicle, in accordance with an embodiment of the present disclosure.
Figure 2 is a flow diagram depicting a method of de-fogging by the heater assembly, in accordance with an embodiment of the present disclosure.
The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the system and method illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
While the embodiments in the disclosure are subject to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.

The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that assembly, mechanism, system, method that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system, or assembly, or device. In other words, one or more elements in a system proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or method.
Embodiments of the present disclosure discloses a heater assembly for a headlamp unit. The heater assembly comprises at least one heating element disposable along an inner periphery of at least one cover member of the headlamp unit. The heater assembly comprises one or more first sensors disposable in the headlamp unit, where the one or more first sensors are configured to sense moisture build up on the at least one cover member. The heater assembly includes a control unit communicatively coupled to the one or more first sensors. The control unit is configured to receive an input signal from the one or more first sensors on build-up of moisture. The control unit activates the at least one heating element to dissipate heat onto the at least one cover member. With such configuration, the heater assembly may efficiently de-fog the headlamp unit within a short time and may enhance transmission efficiency of the headlamp and/or taillamp of the vehicle.
The disclosure is described in the following paragraphs with reference to Figures 1a to 2. In the figures, the same element or elements which have same functions are indicated by the same reference signs. It is to be noted that, the vehicle is not illustrated in the figures for the purpose of simplicity. One skilled in the art would appreciate that the heater assembly and the method as disclosed in the present disclosure may be used in any vehicle including but not liming to commercial vehicles, and passenger vehicles, and the like. The system and the method of the present disclosure may also be implemented in all lighting & light signaling lamps/devices of the vehicle exposed to colder environments in vehicles without deviating from the principles of the present disclosure.

Figures 1a illustrates an exemplary embodiment of the present disclosure which illustrate a heater assembly (100) for a headlamp of a vehicle [not shown explicitly in figures]. In an embodiment, the vehicle may include, but not limited to, an electric vehicle, a hybrid vehicle and the like, comprising one or more lamp units including headlamps and taillamps. Each lamp unit comprises at least one reflector [not shown explicitly in figures] configured to reflect light, at least one light source (10a, 10b) configured to be received within the at least one reflector to emit light, and at least one cover member (11) configured to provide ingress protection to the at least one reflector and the at least one light source (10a, 10b). In an embodiment, the at least one light source (10a, 10b) may include, but not limited to, a plurality of LEDs, an incandescent light and the like. The at least one cover member (11) may include a transparent cover made of, for example, transparent polycarbonate material or any other material which is capable to resist temperatures in a range of -20˚C to 140˚C. In an embodiment, profile of the at least one cover member (11) may be varied based on aerodynamic requirements of the headlamp and the vehicle. For sake of explanation, shape of the headlamp unit (200) is depicted as an elliptical profile as can be seen in Figure 1a and the same shall not be construed as a limitation. In the illustrative embodiment, the headlamp unit (200) is depicted with two light sources such as a first light source (10a) and a second light source (10b) as can be seen in Figure 1a and the same shall not be construed as a limitation, as the number of light sources may be varied based on lighting requirements and design requirements of the headlamp unit (200).
Referring now to Figure 1a, the headlamp unit (200) includes a heater assembly (100) configured to de-fog the headlamp unit (200). The heater assembly (100) is configured to de-fog based on temperature difference and condensation within the headlamp unit (200). The heater assembly (100) comprises at least one heating element (2) disposable along an inner periphery of at least one cover member (11) of the headlamp unit (200). In an embodiment, the at least one heating element (2) may be disposed along inner periphery of at least one of the reflector and the at least one cover. In the illustrative embodiment, the at least one heating element (2) is

depicted as a polyimide heater strip disposed along the inner periphery of the cover member (11) to effectively de-fog the headlamp unit (200) at corners of the cover member (11). The at least one heating element (2) is configured to emit heat to de-fog the condensed moisture and/or water droplets within the headlamp unit (200) upon receiving supply of power from a power source such as a battery or other power sources thereof. In an embodiment, the heating element (2) may dissipate heat by convection to de-fog the headlamp unit (200). The headlamp unit (200) may include multiple heating elements disposed in series or any other configuration along the inner periphery of the cover member (11) based on dimensions and profile of the of the cover member (11). In an embodiment, the heating element (2) may be integrally defined on the cover member (11) or may be detachably disposed on the cover member (11). The heating element (2) may be adhered on the at least one cover member (11) along the inner periphery by one of an adhesive, and like.
Referring now to Figure 1b, which is an exemplary block (301) diagram illustrating the heater assembly (100). The heater assembly (100) comprises one or more first sensors (1) disposable in the headlamp unit (200). The first sensors (1) maybe disposed on a portion of one of the reflector, the cover member (11). In an embodiment, the first sensors (1) may be disposed proximal to the inner periphery or may be disposed in a spaced apart configuration along the cover member (11) for accurate detection of the moisture buildup in the headlamp unit (200). The first sensors (1) are configured to sense moisture build-up in the headlamp unit (200). In an embodiment, the first sensors (1) may include a plurality of humidity and temperature sensors configured to sense temperature and humidity values within the headlamp unit (200) to sense moisture build-up within the headlamp unit (200). The vehicle may include one or more second sensors (3) configured to sense moisture content value outside the headlamp unit (200). The second sensors (3) may include one or more optical sensors such as, but not limited to, rain light sensors and the like configured to sense moisture content value outside the headlamp. In an embodiment, the second sensors (3) may be disposed behind a rear-view mirror of the vehicle to sense moisture content outside the vehicle based on, for example,

rain, dew formation and the like on a windshield of the vehicle. In an embodiment, the second sensors (3) are communicatively coupled to the at least one heating element (2).
In an embodiment, the heater assembly (100) includes a control unit (5) communicatively coupled to the first sensors (1) and the second sensors (3). The control unit (5) is configured to receive an input signal from the one or more first sensors (1) corresponding to build-up of moisture within the headlamp unit (200). The input signal corresponds to at least one first signal indicative of moisture content in the headlamp unit (200) from the first sensors (1). The control unit (5) may receive at least one second signal corresponding to moisture content outside the headlamp unit (200) from the second sensors (3). The at least one signal received from the one or more second sensors (3) may indicate external factors such as rainfall, water droplets, and/or fog deposits on a windshield of the vehicle.
The control unit (5) is configured to compare the moisture content value received from the one or more first sensors (1) with a first threshold value. The first threshold value may correspond to a moisture content value at a predetermined humidity and temperature inside the headlamp unit (200). The first threshold value may correspond to a minimum value of moisture content that requires heating to evaporate from the headlamp unit (200). In an embodiment, the control unit (5) is configured to determine condensation within the headlamp unit (200) based on comparison of the first threshold value and the moisture content value from the one or more first sensors (1). In an embodiment, the control unit (5) may determine condensation within the headlamp unit (200) when the moisture content value is numerically greater than the first threshold value.
In an embodiment, the control unit (5) is configured to compare the moisture content value received from the second signal with a first threshold value. In an embodiment, the control unit (5) may be configured to compare the moisture content from the second signal with a second threshold value corresponding to a minimum value of moisture content or humidity or temperature inside the headlamp

unit (200) of the vehicle which results in moisture build-up within the headlamp unit (200). In an embodiment, the control unit (5) may determine build-up of moisture in the headlamp unit (200) based on at least one of comparison of the moisture content from the first signal with the first threshold value or moisture content from the second signal with the second threshold value or both. In the illustrative embodiment, the control unit (5) is configured to determine the condensation in the headlamp unit (200) when the moisture content value from the first signal is numerically greater than the first threshold value and the moisture content value from the second signal is numerically greater than the second threshold value to accurately determine moisture build-up in the headlamp unit (200). In an embodiment, the first threshold value and the second threshold value may be same or different based on requirement. In an embodiment, the control unit (5) may determine condensation in the headlamp unit (200) when the moisture content from the first signal and the moisture content from the second signal are different or there is a difference in temperatures. In an embodiment, the control unit (5) may determine difference between moisture content/temperature from the first signal and the moisture content/temperature from the second signal and compare the difference with a third threshold value to determine the condensation. The third threshold value may correspond to a predefined temperature difference required for condensation based on temperature and humidity.
Further, the control unit (5) is configured to activate the heating element (2) upon determination of condensation within the headlamp unit (200) to dissipate heat. The heating element (2) dissipates heat to de-fog the headlamp unit (200) within a short time in a range of 15 to 20 minutes. The control unit (5) is configured to deactivate the heating element (2) when the moisture content from the first signal is numerically less than the first threshold value and the moisture content from the second signal is numerically less than the second threshold value to avoid unnecessary heating inside the headlamp unit (200). In an embodiment, the control unit (5) may be communicatively coupled to the power source supplying power to the heating element (2) and may be configured to transmit a signal to supply or cut-

off supply of power to the heating element (2) for activating and deactivating the heating element (2) respectively. Thus, the heater assembly (100) allows automatic switching of the heating element (2) based on moisture content within and outside the headlamp unit (200). Furthermore, as the heating element (2) is disposed along inner periphery of the cover member (11) of the headlamp unit (200), the heating is uniform and effectively de-fogs the headlamp unit (200).
In an embodiment, the control unit may be a centralised control unit of the vehicle or may be a dedicated control unit to the system associated with the centralised control unit of the vehicle. The control unit may also be associated with other control units including, but not limited to, body control unit, engine control unit, transmission control unit, and the like. The control unit may be comprised of a processing unit. The processing unit may comprise at least one data processor for executing program components for executing user- or system-generated requests. The processing unit may be a specialized processing unit such as integrated system controllers, memory management control units, floating point units, graphics processing units, digital signal processing units, etc. The processing unit may include a microprocessor, such as AMD Athlon, Duron or Opteron, ARM’s application, embedded or secure processors, IBM PowerPC, Intel’s Core, Itanium, Xeon, Celeron or other line of processors, etc. The processing unit may be implemented using a mainframe, distributed processor, multi-core, parallel, grid, or other architectures. Some embodiments may utilize embedded technologies like application-specific integrated circuits, digital signal processors, Field Programmable Gate Arrays, etc.
The control unit may be disposed in communication with one or more memory devices via a storage interface. The storage interface may connect to memory devices including, without limitation, memory drives, removable disc drives, etc., employing connection protocols such as serial advanced technology attachment, integrated drive electronics, IEEE-1394, universal serial bus, fiber channel, small computing system interface, etc. The memory drives may further include a drum,

magnetic disc drive, magneto-optical drive, optical drive, redundant array of independent discs, solid-state memory devices, solid-state drives, etc.
Referring now to Figure 3 which is an exemplary embodiment of the present disclosure illustrating a method of de-fogging a headlamp unit (200) by a heater assembly (100) in a vehicle.
The method may describe in the general context of processor executable instructions in the control unit. Generally, the executable instructions may include routines, programs, objects, components, data structures, procedures, modules, and functions, which perform particular functions or implement particular abstract data types.
The order in which the method is described is not intended to be construed as a limitation, and any number of the described method blocks may be combined in any order to implement the method. Additionally, individual blocks may be deleted from the methods without departing from the scope of the subject matter described herein. Furthermore, the method can be implemented in any suitable hardware, software, firmware, or combination thereof.
At block 301, the control unit (5) which is communicatively coupled to the one or more first sensors (1) and the one or more second sensors (3), receives an input signal from the one or more first sensors (1) corresponding to build-up of moisture within the headlamp unit (200). The input signal corresponds to at least one first signal indicative of moisture content in the headlamp unit (200) from the one or more first sensors (1). The control unit (5) receives at least one second signal corresponding to moisture content outside the headlamp unit (200) from one or more second sensors (3). The at least one signal received from the one or more second sensors (3) may indicate at least rainfall, water droplets on a windshield of the vehicle, and fog deposits on the windshield of the vehicle. In an embodiment, the control unit (5) may receive real-time values of the moisture content from the

first sensors (1) and the second sensors (3) or may receive values of the moisture content at regular intervals based on design requirements.
At block 302, the control unit (5) compares the moisture content value received from the one or more first sensors (1) with a first threshold value. The first threshold value may correspond to a moisture content value at a predetermined humidity and temperature inside the headlamp unit (200). The first threshold value may correspond to a minimum moisture content that requires heating in order to condensate and evaporate. In an embodiment, the control unit (5) is configured to compare the moisture content value received from the second signal with the first threshold value. In an embodiment, the control unit (5) may be configured to compare the moisture content from the second signal with a second threshold value corresponding to a minimum moisture content inside the headlamp unit (200) vehicle which may result in moisture build-up within the headlamp unit (200).
At block 303, the control unit (5) determines condensation within the headlamp unit (200) based on comparison of the first threshold value and the moisture content value from the one or more first sensors (1). In an embodiment, the control unit (5) may determine condensation within the headlamp unit (200) when the moisture content value is numerically greater than the first threshold value. In an embodiment, the control unit (5) may determine build-up of moisture in the headlamp unit (200) based on at least one of comparison of the moisture content from the first signal or moisture content from the second signal or both. In the illustrative embodiment, the control unit (5) is configured to determine the condensation in the headlamp unit (200) when the moisture content from the first signal is numerically greater than the first threshold value and the moisture content from the second signal is numerically greater than the second threshold value to accurately determine moisture build-up in the headlamp unit (200). In an embodiment, the first threshold value and the second threshold value may be same or different based on requirement.

Further, the control unit (5) is configured to activate the heating element (2) upon determination of condensation within the headlamp unit (200) to dissipate heat. The heating element (2) dissipates heat to de-fog the headlamp unit (200) within a short time in a range of 15 to 20 minutes. The control unit (5) is configured to deactivate the heating element (2) when the moisture content from the first signal is numerically less than the first threshold value and the moisture content from the second signal is numerically less than the second threshold value to avoid unnecessary heating inside the headlamp unit (200).
In an embodiment, the one or more second sensors (3) are existing sensors in the vehicle such as rain light sensors communicatively coupled to control unit (5) via a body control module of the vehicle, thereby reducing need for additional sensors.
In an embodiment, the heater assembly (100) allows automatic switching of the heating element (2) based on moisture content within and outside the headlamp unit (200).
In an embodiment, as the heating element (2) is disposed along inner periphery of the cover member (11) of the headlamp unit (200), heating is uniform and effectively de-fogs the headlamp unit (200).
EQUIVALENTS
With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.
It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims are generally intended as “open” terms. It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in

the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an”; the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number. Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.”
In addition, where features or aspects of the disclosure are described in terms of Markush groups, those skilled in the art will recognize that the disclosure is also

thereby described in terms of any individual member or subgroup of members of the Markush group.
While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
Referral numerals:

Component Referral numeral
Heater 100
One or more first sensors 1
At least one heating element 2
One or more second sensors 3
Body control module 4
Control unit 5
At least one light source 10a, 10b
At least one cover member 11
Headlamp unit 200
Method 300

We claim:
1. A heater assembly (100) for a headlamp unit (200) of a vehicle, the
heater assembly (100) comprising:
at least one heating element (2) disposable along an inner periphery of at least one cover member (11) of the headlamp unit (200);
one or more first sensors (1) disposable in the headlamp unit (200), the one or more first sensors (1) are configured to sense moisture build up on the at least one cover member (11), and
a control unit (5) communicatively coupled to the one or more first sensors (1), the control unit (5) is configured to:
receive an input signal from the one or more first sensors
(1) on build-up of moisture, and
activate the at least one heating element (2) to dissipate
heat onto the at least one cover member (11).
2. The heater assembly (100) as claimed in claim 1, wherein the one or more first sensors (1) is configured to sense temperature and humidity in the headlamp unit (200).
3. The heater assembly (100) as claimed in claim 1, wherein the at least one heating element (2) is communicatively coupled to one or more second sensors (3) disposed in the vehicle.
4. The heater assembly (100) as claimed in claim 3, wherein the one or more second sensors (3) are configured to sense moisture content value outside the headlamp unit (200).
5. A headlamp unit (200), the headlamp unit (200) comprising:
at least one reflector;
at least one light source (10a, 10b) configured to be received within the at least one reflector;

at least one cover member (11) configured to provide ingress protection to the at least one reflector and the at least one light source (10a, 10b), and
a heater assembly (100), comprising:
at least one heating element (2) disposable along an inner periphery of at least one cover member (11) of the headlamp unit (200);
one or more first sensors (1) disposable in the headlamp unit (200), the one or more first sensors (1) are configured to sense moisture build up on the at least one cover member (11), and
a control unit (5) communicatively coupled to the one or more first sensors (1), the control unit (5) is configured to:
receive an input signal from the one or more first sensors (1) on build-up of moisture; and
activate the at least one heating element (2) to dissipate heat actuation onto the at least one cover member (11).
6. A method of de-fogging a headlamp unit (200) by a heater assembly (100), the method comprising:
receiving, by a control unit (5), at least one first signal corresponding to moisture content in the headlamp unit (200) from one or more first sensors (1), the one or more first sensors (1) are communicatively coupled to the control unit (5);
comparing, by the control unit (5), moisture content value with a threshold value;
determining, by the control unit (5), condensation within the headlamp unit (200) based on comparison of first threshold value and moisture content value, and

actuating, by the control unit (5), at least one heating element (2) disposed on an inner periphery of the headlamp unit (200) to dissipate heat.
7. The method as claimed in claim 6, comprising:
receiving, by the control unit (5), at least one second signal corresponding to moisture content outside the headlamp unit (200) from one or more second sensors (3) communicatively coupled to the control unit (5);
comparing, by the control unit (5), moisture content value outside the headlamp unit (200) from the at least one second signal; and
determining, by the control unit (5), condensation within the headlamp unit (200) based on comparison for activating the at least one heating element (2).