DESC:

FIELD OF THE INVENTION:

The present invention relates to a novel anti-glare device with improved homogeneity having a light guide with segmented walls and a method thereof. More specifically, the novel anti-glare device with improved homogeneity for automobile has a light guide with segmented walls that provide homogenization in the resultant light beam and it prevents accumulation of light (intensity) across the single-segment light distribution.

BACKGROUND OF THE INVENTION:

Headlamps are directly installed on the vehicle body of an automobile/vehicle and specifically on two-wheelers, three-wheelers, four-wheelers etc. Hereinafter, the terms ‘vehicle’, ‘automobile’, and ‘two-wheeler’ may be alternatively used and shall refer to the same thing. A vehicle headlamp usually has an anti-glare device incorporated in it. The anti-glare device comprises one or more optical components which are arranged in such a way that they can prevent glare of light in the eyes of the oncoming or proceeding vehicle driver. Further, such device uses a light guide with segmented walls whose interior texture is a combination of both a smooth and a rough surface. This arrangement of smooth and rough surfaces prevents excessive luminance in the eyes of the vehicle driver.

However, in such state of art devices, there is reflection of the light rays in the internal surface of the light guide due to the presence of a smooth textured surface. Consequently, there is a lack of light rays in the substantial part of the sections in between the regions where light rays are not reflected. In other words, the light rays are accumulated in some of the sections/pockets of the light guide leading to non-homogeneous distribution, which causes dark patches and haziness in the light beam leading to difficulty in viewing objects placed on the road surface.

Further, it leads to an excessive contrast between the dark areas and the bright areas in the direction of viewing and will result in glare of lights in the eyes of the oncoming and proceeding vehicle driver.

Another problem existing in the state of art is improper mixing up of the light rays hence, improper reflection of light rays with reduced luminous intensity from the light guide having a surface with a combined texture of roughness and smoothness. Due to this, the resultant light beam coming out from the outlet port of the light guide with segmented walls is non-uniform and leads to uneven spreading and distribution of light beam onto the road surface. This leads to the glare of lights making a blind spot for the oncoming and proceeding vehicle driver and will further cause collision among the vehicles.

The state of art anti-glare devices have a high manufacturing cost due to the requirement of removal of the irregularity in the smooth surface and subsequent quality checks resulting to the rejection of devices with even minute irregularity in the smooth surface.

Thus, the state of art anti-glare devices result in poor and uneven visibility due to the occurrence of the glare of light in the eyes of the oncoming and proceeding vehicle driver. Further, the state of art devices has been into usage and incorporated into the vehicle headlamp are as follows:

US20160230949A1 discloses a vehicle headlight used for low beam and high beam.
It relates to a vehicle lighting device including a transparent material lighting optical component, delimited by
a entry surface,
a first reflection surface arranged substantially facing an entry surface, and
an exit surface,
wherein the first reflection surface is oriented relative to the entry surface so that light rays from a light source passing through the entry surface are directed by the first reflection surface toward the exit surface, wherein the transparent material lighting optical component includes a light source arranged relative to the entry surface of the transparent material lighting optical component so that light rays from the light source passing through the entry surface are reflected by the first reflection surface toward the exit surface.
It specifically states that light rays from the light source enters in the reflector through an entry surface. Thereafter, the light rays will pass to the reflector, where once the light rays come in the reflector, it reflects in accordance with the principle of total internal reflection. This light rays then passes out from an exit surface as a light beam. The vehicle lighting device as disclosed in the US’949 includes a transparent material which is chosen from PMMA, PMI and polycarbonate.

CN108775547A discloses a lighting display device which has a light source module, an antiglare module and a projection lens module. The light source module is in matrix form through which light rays are illuminated. Further, there are optical lens which reflects these light rays. Further, the material for receiving optical lens array element is organosilicon, PC, PMMA or glass. These light rays are reflected onto projection lens which is placed in the antiglare module. In this way matrix pixelation of light with multi-beam light projection is possible.

EP2767754A2 discloses an illumination device that has a light source and a light-guide collimating optic (LGCO). The LGCO accepts light from the small isotropic light source such as a light emitting diode (LED) or a bulb and spreads the light over a wide area while also collimating it to form a beam wherein all the rays are substantially parallel. Further, the LGCO has two stages, a waveguide stage (also referred to as an optical waveguide stage and which includes a waveguide section) and a collimating stage (also referred to as a light-projecting stage). Light inserted into the LGCO at an input face is guided internally by total internal reflection in the waveguide stage and spreads substantially evenly over the LGCO. Light then couples into the collimating stage via a multiplicity of apertures (also referred to as optical input apertures) that allow light to escape the waveguide stage. Further, the waveguide stage and the collimating stage can be made of any appropriate optical material (e.g., PMMA).

KR100401263B1 discloses an anti-glare reflector of the headlamp which is formed with a lamp fitting hole and a predetermined interval to the cap-shaped in one direction of the lamp fitting hole, protrudes toward the circumferential inner centre side of the cap shape. It is formed between the bending reflection portion having a refractive reflection surface bent in the longitudinal direction as possible, and the bending reflection portion formed between the bending reflection portion, and sequentially formed along the circumferential surface of the cap shape. Further, in this device two types of reflectors are used i.e. a reflective and non-reflective reflector. Since, the light reflected from the non-reflective reflector is formed by being divided in the circumferential direction, the light reflected from the lamp and reflected by the reflector is divided into small pieces and bent and irradiated.

However, although state of art devices in the headlamps intends to prevent the glare of light in the eyes of the vehicle driver, they are unable to eliminate the formation of non-homogeneities because of which resultant output beam is distributed onto the road surface non-homogeneously, non-uniformly, unevenly and poorly. Additionally, the state of art devices are not able to completely remove the glare in the resultant output beam of the anti-glare device.

Also, the state of art anti-glare devices have a high manufacturing cost due to the need for a smooth texture on the surface of the light guide.

Hence, there is a need for an improved anti-glare device that will be able to eliminate these technical problems and will provide the distribution of output beam homogenously thereby leading to good visibility for the vehicle driver.

SUMMARY OF THE INVENTION:

It is an object of the present invention to provide a novel anti-glare device with improved homogeneity for automobile having a light guide with segmented walls. Further, another object of the present invention is that the segmented walls of light guide of the anti-glare device have a rough interior surface texture to provide homogeneity. Thus, there is an improvement in the luminous intensity of the reflected light rays.

The present invention relates to a novel anti-glare device with improved homogeneity for illuminating road surface that comprises of:
• a plurality of a light source;
• a plurality of a light guide with segmented walls, wherein the light guide with segmented walls has a snake skin structure to provide segments on the external side and a rough textured surface on the internal side; and
• a plurality of an inlet port and a plurality of an outlet port linked to front end and rear end of the light guide with segmented walls;
wherein the novel anti-glare device projects a light beam having feature of uniformity, homogeneity, and improved luminous efficiency.

Further, the rough textured surface of the light guide with segmented walls has irregularity in the form of waves. Additionally, there is a pre-determined distance between any two consecutive crusts in the waves in the rough textured surface of the light guide with segmented walls. Due to this wavy structure, the light rays bounces back and gets mixed up with each other in the light guide with the segmented walls which results in prevention of accumulation of the light rays in any section of internal surface of light guide. So, there is no accumulation of the light rays in any section of internal surface of light guide. This further ensures reflection of light rays in accordance with the principle of total internal reflection inside the light guide. Thus, every portion of light guide gets lit up and hence patches of darkness will not form in any section of internal surface of light guide and thereby improving the luminous intensity of reflected light rays. As a result, the light guide with segmented walls with a wavy structure will completely eliminate glare in resultant light beam. As a result, the novel anti-glare device of automobile projects a light beam having feature of uniformity, homogeneity, and improved luminous efficiency.
Moreover, the material of the light guide with segmented walls is transparent plastic and is formed up of PMMA and can be made of other optical materials like PC, silicone etc.

There are two open outlets at the ends of the light guide with segmented walls i.e. an inlet port and an outlet port for light rays to enter and exit respectively. This will ensure that the reflected light rays are not able to leave the light guide.

In the present invention, optical elements such as light source, light guide with segmented walls, inlet port and outlet port are arranged in such a manner that the resultant light beam is distributed homogeneously, uniformly and evenly onto road surface or vertical illumination plane (like a wall of the building). The invention further ensures that the illuminated light beam does not cause haziness while viewing an object by the vehicle driver hence visibility is not impaired.

Further, it also ensures improvement in visibility and prevention of glaring lights for oncoming or proceeding vehicle driver leading to prevention of collision among vehicles. It also ensures the safety of vehicle driver along with safety of co-passenger and pedestrians walking on the road.

In addition to this, the non-requirement of smooth surface allows saving of manufacturing cost since no additional machining and polishing is required for the removal of irregularity from the surface of the light guide with segmented walls in the present invention.

The present invention further relates to a method of illumination of road surface using the novel anti-glare device with improved homogeneity having a light guide with segmented walls which includes:
• incident light rays from a light source that will fall on inlet port of a light guide with segmented walls;
• provides a path inside the light guide with segmented walls for reflection of light rays;
• project light beam from outlet port after following principle of total internal reflection from the light guide with segmented walls; and
• thereby, illuminating road surface by uniformly distributing light beam from outlet port of the light guide with segmented walls.

The summary is provided to introduce the system and a method for a representative concept, in a simplified form that are further described below in the detailed description.

This summary is not intended to limit the key essential features of the present invention nor its scope and application. Other advantages and details about the system and the method will become more apparent to a person skilled in the art from the below detailed description of the invention when read in conjugation with the drawings.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:

Embodiments are described with reference to the following Figures. The same numbers may be used throughout to reference like features and components that are shown in the Figures:
Figure 1 (a) illustrates a conventional anti-glare device which is incorporated in the vehicle headlamp.
Fig. 1 (b) illustrates a smooth textured surface of the light guide of the conventional anti-glare device to reflect light rays.
Figure 2 illustrates an isophotal graph of the distribution of light beam from the conventional anti-glare device.
Figure 3 (a) illustrates the novel anti-glare device with improved homogeneity for a vehicle headlamp to project light rays in accordance with an embodiment of the present invention.
Figure 3 (b) illustrates the rough textured surface of the light guide with segmented walls of the novel anti-glare device with improved homogeneity to reflect light rays in accordance with an embodiment of the present invention.
Figure 4 illustrates isophotal graph of distribution of the light beam through the novel anti-glare device with improved homogeneity in accordance with an embodiment of the present invention.
Figure 5 illustrates the method of illumination of the road surface from the novel anti-glare device with improved homogeneity having a light guide with segmented walls.

The present invention can be understood with reference to the detailed figures and description set forth herein. Various embodiments are discussed below with reference to the figures. However, those skilled in the art will readily appreciate that the detailed descriptions given herein with respect to the figures are simply for explanation of the invention as the methods and systems may extend beyond the described embodiments. For example, the teachings presented and the needs of a particular application yield multiple alternative and suitable approaches to implement the functionality of any detail described herein. Therefore, any approach extends beyond the particular implementation choices in the following embodiments described and shown.

References to “one embodiment,” “at least one embodiment,” “an embodiment,” “one example,” “an example,” “for example,” and so on indicate that the embodiment(s) or example(s) may include a particular feature, structure, circuit, architecture, characteristic, property, element, or limitation but that not every embodiment or example necessarily includes that particular feature, circuit, architecture, structure, characteristic, property, element, or limitation. Further, repeated use of the phrase “in an embodiment” does not necessarily refer to the same embodiment.

TERMS:

Light rays are defined as the collection of light which is travelling and reflecting inside anti-glare device.

Total internal reflection is reflection of the incident light, which hits a medium boundary at an angle greater than the critical angle, relative to the surface. The phenomenon of total internal reflection takes place only when the following two conditions are satisfied:
• The angle of incidence is greater than the critical angle;
• The ray of light travels from a denser medium to a rarer medium.

Glaring of light is a phenomenon where there is loss of visual performance or discomfort produced by an intensity of light in visual field greater than intensity of light to which the eyes are adapted. Additionally, glare occurs when too much light enters into eye and it interferes with the eye’s ability to manage it. Glare can be distracting and even dangerous and can occur in day or night in a number of ways. Glare may come directly from a light source or be reflected.

Light guiding element is defined as an optical element of the headlight through which light rays travel through and reflects too at the same time.

Snake skin is defined as a structure wherein the external surface of the light guide is in segmented form and this provides a rough textured surface to the interior of the light guide.

Inlet port of light guide is defined as a surface portion from which lights rays entered inside the light guide.

Outlet port of the light guide is defined as a surface portion from which light rays are distributed from the light guide onto the road surface.

Smooth surface of the light guide is defined as a surface wherein there is no irregularity in it and thus provides an even surface.

Rough surface of the light guide is defined as a surface where there is a presence of irregularity on its surface and thus provides an uneven surface.

Intensity of light rays is defined as quantity of visible light that is emitted in unit time per unit solid angle.

Enclosed is defined as the shape of the light guide wherein it is considered as a closed element with open outlets at either of its ends. There are two open outlets in the light guide with segmented walls i.e. an inlet port and an outlet port for entry and exit of the light rays respectively.

Light beam is defined as the collection of light which is being distributed from the outlet port of the light guide in order to illuminate road surface.

Lit up is defined as a phenomenon wherein the light guide with segmented walls is receiving light rays properly in a manner such that there is no formation of dark patches in any segment of the internal surface of the light guide with segmented walls.

DESCRIPTION:

The anti-glare device incorporated in a vehicle headlamp is illustrated with various embodiments to depict orientation and arrangement of optical elements to project light rays from such devices. In Fig. 1 (a), a conventional anti-glare device incorporated in the vehicle headlamp (100) is illustrated. The conventional anti-glare device (100) incorporated in the vehicle headlamp includes optical elements which comprises of a light source (101), a light guide (103) having an inlet port (102) and an outlet port (104) in it. In the conventional anti-glare device (100), the light source (101) is placed in conjunction with the inlet port (102) of the light guide (103). The light guide (103) in the conventional anti-glare device (100) has a smooth textured surface. Further, the requirement of the even surface in the light guide (103) is to ensure light rays to reflect. The outlet port (104) of the light guide (103) in the conventional anti-glare device (100) is located at a pre-determined distance (105) from the inlet port (102) of the light guide (103).

In the conventional anti-glare device (100), the light rays emitted from the light source (101) falls onto the inlet port (102) of the light guide (103). This allows light rays to travel through the light guide (103). Further, the smooth textured surface of the light guide (103) allows light rays to reflect. These reflected light rays reached to the outlet port (104) of the light guide (103). The resultant light beam from the outlet port (104) of the light guide (103) illuminates the road surface.

Fig. 1 (b) illustrates smooth textured surface [103(a)] of the light guide (103) as present in the conventional anti-glare device (100). This smooth textured surface 103(a) of the light guide (103) causes various technical problems. The smooth textured surface [103(a)] of the light guide (103) causes an accumulation of light rays in some of its sections in the internal surface as shown in Fig. 1 (b) thereby causing an improper reflection of the light rays. Due to this, it causes a hindrance during travelling of the light rays inside the light guide (103) and decreases the luminous intensity of reflected light rays. This also leads to improper lit up of light guide (103) in the conventional anti-glare device (100). Additionally, this hindrance along with accumulation of light rays cause formation of dark patches in light guide (103). Further, the resultant light beam from the outlet port (104) of light guide (103) has decreased luminous intensity. Additionally, the distribution of this resultant light beam is also non-uniform and non-homogeneous because of the reduced luminous intensity. This severely hampers the visibility of the vehicle driver for seeing objects lying on road surface. In addition to this, the distributed light beam on the road surface is uneven which causes phenomenon of excessive contrast between dark areas and bright areas in direction of viewing and will result into glare of lights in the eyes of oncoming or proceeding vehicle driver.

In Fig. 2, a graph (200) is depicted which illustrates a non-uniform and uneven light beam distribution from the conventional anti-glare device (100). In the light distribution graph (200), horizontal section (201) represents width of the light beam (203) and vertical section (202) represents area at which distributed light beam (203) is illustrated respectively. As it is shown in the graph (200), there are non-homogeneities (204) in light beam (203) because of smooth surface [103(a)] in the light guide (103). This also causes the accumulation of light rays in some sections of internal surface of the light guide (103), thereby, resulting into an improper reflection of light rays in the light guide (103).

Thereby, the conventional anti-glare device (100) causes poor visibility for oncoming and proceeding vehicle driver. In the conventional anti-glare device (100), there is another technical problem which is glaring of light in eyes of the oncoming and proceeding vehicle driver and is one of the major reasons of collision of the vehicles on the road.
Another major disadvantage of the conventional anti-glare device (100) is that it severely hampers the safety of both the pedestrians and the vehicle’s driver and other co-passenger who is travelling with driver.

Another disadvantage of the conventional anti-glare device (100) is also that its manufacturing cost is high as it requires smooth surface of the light guide (103) which results into additional cost of machining and polishing to remove any surface irregularity.

Hence, there is a need for an invention which provides an anti-glare device which uses a light guide with segmented walls with rough interior surface having wavy structure which causes total internal reflection of light rays and thereby resulting in an even, homogeneous and uniform light distribution on the road surface and hence, improving visibility of vehicle driver.

The present invention relates to a novel anti-glare device with improved homogeneity for illuminating road surface comprises of:
• a plurality of a light source;
• a plurality of a light guide with segmented walls, wherein the light guide with segmented walls has a snake skin structure to provide segments on the external side and a rough textured surface on the internal side; and
• a plurality of an inlet port and a plurality of an outlet port linked at front end and rear end of the light guide with segmented walls
wherein the novel anti-glare device project a light beam having feature of uniformity, homogeneity, and improved luminous efficiency.

Further, the rough textured surface of the light guide with segmented walls has irregularity in the form of waves. Additionally, there is a pre-determined distance between any two consecutive crusts in the waves in the rough textured surface of the light guide with segmented walls. Due to this wavy structure, the light rays bounce and gets mixed up with each other in the light guide with the segmented walls which results in the prevention of accumulation of the light rays in any section of the internal surface of the light guide. This further ensures reflection of the light rays in accordance with the principle of total internal reflection inside the light guide. Thus, every portion of light guide with segmented walls gets lit up and hence patches of darkness will not form in any section of the internal surface of the light guide and thereby improving the luminous intensity of reflected light rays. As a result, the light guide with segmented walls with a wavy structure will completely eliminate glare in the resultant light beam. Moreover, the material of the light guide with segmented walls is transparent plastic and is formed up of PMMA and other optical materials like PC, silicone etc.

There are two open outlets at both the ends of the light guide with segmented walls i.e. an inlet port and an outlet port for light rays to enter and exit respectively. This will ensure that the reflected light rays are not able to leave the light guide from anywhere else.

In the present invention, the optical elements such as the light source, the light guide with segmented walls, the inlet port and the outlet port are arranged in such a manner that the resultant output light beam is distributed homogeneously, uniformly and evenly onto the road surface. The invention further ensures that the illuminated light beam onto the road surface does not causes haziness while viewing an object by the vehicle driver hence visibility is not impaired.

In Fig. 3(a), an arrangement of the novel anti-glare device with improved homogeneity (300) is illustrated which is used for prevention of glare of light in eyes of oncoming or proceeding vehicle driver. In particular, in an exemplary embodiment, as shown by Fig. 3(a), the novel anti-glare device with improved homogeneity (300) comprises of a plurality of the light source (301), a plurality of the light guide with segmented walls (303) having a plurality of inlet port (302) and a plurality of outlet port (304) in it at its front end and rear end respectively. The present invention is incorporated in the vehicle headlamp for lightning function. In other embodiments, the present invention can also be used as a light guide for example in a satellite telecommunications antenna, as a light guide in a solar cooking-based device.

The light source (301) is oriented at a pre-determined angle with respect to inlet port (302) of plurality of the light guide with segmented walls (303). In one embodiment, light source (301) is oriented at an angle of 90 degree with respect to inlet port of light guide with segmented walls (303). Range of angle in this respect can vary anywhere between 45 degree to 90 degree. Further, factor determining light source angle respect to light guide with segmented walls is based on ensuring that inlet port is parallel with the light source to receive sufficient and maximum light rays.
Fig. 3(a) illustrates the use of one light source (301) in the present invention. Alternatively, the number of light sources may vary. Further, orientation of light source (301) is arranged in such a manner that the incident light rays from light source (301) strike directly onto interior surface of the light guide with segmented walls (303) through the inlet port (302).

Further, the outlet port (304) is located at a pre-determined distance (305) from the inlet port (302). The pre-determined distance (305) between inlet port (302) and outlet port (304) depends on shape of the light guide with segmented walls (303) and area of usage of the novel anti-glare device. In other embodiments, this pre-determined distance (305) measurement may vary in range of 10-150 mm. Thereafter, from the light guide with segmented walls (303), the light rays will exit through outlet port (304). The inlet port (302) and outlet port (304) have a predetermined diameter. The factor determining this pre-determined diameter of inlet port (302) and outlet port (304) is based on size of the light source (301) used in the present invention. Further, diameter for inlet port (302) and outlet port (304) falls in range of 2-20mm.

In furtherance of this, the light guide with segmented walls (303) is parabolic in shape with a curvature of a pre-determined angle and at a predetermined distance from the inlet port (302). Preferably, shape of the light guide with segmented walls in the present invention is based on fulfilling conditions of total internal reflection. In other words, the light guide used in the present invention is shaped in such a way that the ratio of the luminous flux between the output light beam and input light ray should be as high as possible/ as close as possible to 100%. Further, light guide with segmented walls (303) is placed as close as possible to the inlet port (302) and range can vary between 0- 0.5mm.

The presence of rough textured surface, material and shape of the light guide with segmented walls (303) is determined in such a manner that it provides maximum surface area for light rays to bounce and mix up with each other.

The light guide with segmented walls (303) is made of transparent plastic and is formed up of PMMA (Polymethyl Methacrylate). Alternatively, material of the light guide can be silicone, PC (Polycarbonate) and so on. Further, light guide with segmented walls (303) has snake skin structure. This structure provides segments on external side and rough textured surface on internal side of the light guide with segmented walls. Further, due to the presence of transparent material and rough textured surface of the light guide with segmented walls (303), there is prevention of accumulation of reflected light rays. As a result, there is a proper reflection of light rays inside it. This reflection of light rays is in accordance with principle of total internal reflection in the light guide with segmented walls (303).

The number of light guide with segmented walls used in the present invention may vary as per the requirement of the user. In one of the embodiments of present invention, there is a use of one light guide for reflecting light rays. Alternatively, the number of light guides used in the present invention may vary and is based on size of headlamp used in the automobile. In other words, in a two-wheeler headlamp, there can be used three light guides and on the other hand, in a four-wheeler headlamp, there can be used five light guides.

Further, the present invention provides maximum surface area for light rays to bounce and mix-up along with its reflection. Additionally, the following factors ensures provision of maximum surface area in the light guide with segmented walls (303):
• The material of light guide with segmented walls (303).
• The shape of light guide with segmented walls (303)
• The pre-determined distance between inlet port (302) and outlet port (304) in the light guide with segmented walls (303).
• The diameter of inlet port (302) and outlet port (304) in the light guide with segmented walls (303).
• The pre-determined distance between any two consecutive crusts of waviness of rough textured surface in the light guide with segmented walls (303).

Fig. 3 (b) illustrates rough textured surface [303(a)] which is present on interior side of the light guide with segmented walls (303) wherein roughness has an irregularity. This irregularity in the light guide (303) is in wavy form [303(a)]. Further, there is a pre-determined distance between any two consecutive crusts in wave form (303a) in the light guide with segmented walls (303) and this distance is determined on the basis of following factors:
(i) Light rays are bouncing and mixing up with each other efficiently inside the light guide with segmented walls (303) to prevent accumulation of reflected light rays in any portion of internal surface in light guide with segmented walls (303);
(ii) Light rays are reflected inside the light guide (303) in accordance with principle of total internal reflection to ensure an enhanced lit up of light guide with segmented walls (303);

In one of the embodiments of present invention, the wavy structure of light guide has a crust length in range of 4mm to 6 mm and more specifically of 5mm and distance between each of the consecutive crusts in wave form of light guide is 0.5mm. Alternatively, length of the crust and distance between each of the consecutive waves of light guide may vary.

Thus, the optical elements such as light source (301), light guide with segmented walls (303), inlet port (302) and outlet port (304) are arranged in such a manner that resultant output light beam is distributed homogeneously, uniformly and evenly onto the road surface. It further ensures that illuminated light beam onto road surface does not cause haziness to vehicle driver while viewing an object by, hence visibility is not impaired. This resultant light beam illuminates road in both horizontal plane and vertical plane thereby achieving the objective of improved homogeneity. In other words, the present invention provides a wider area of the illumination which further allows oncoming/proceeding vehicle driver to have better and improved access with respect to visibility of the road.

Further, the present invention ensures prevention of glaring of lights for oncoming and proceeding vehicle driver leading to prevention of collision of vehicles on the road surface. Thereby, present invention ensures safety of vehicle driver along with safety of the co-passenger and pedestrians walking on the road.

Advantageously, characteristic of the novel anti-glare device with improved homogeneity (300) is to provide an improvement in vision of the oncoming and proceeding vehicle driver both during day time as well as at night time.

In addition to this, non-requirement of a smooth surface allows for saving of manufacturing cost since no additional machining and polishing is required for removal of irregularity from surface of plurality of the light guide with segmented walls in the present invention. Thus, present invention offers advantage of economical significance along with technical advancement.

The light guide used in the present invention is rough and it is not limited to a particular grade. Further, grade of roughness as employed in the light guide of the present invention may vary. Additionally, form of the roughness employed on surface of the light guide of the present invention is not limited to waviness and thus can vary to other forms. The factors determining shape, dimension and structure of light guide as used in the present invention is based on objective of providing a resultant light beam from the vehicle headlight with an improved luminous intensity which is close to 100%.

Fig. 4 illustrates an isophotal graph (400) of the light beam projected from the anti-glare device of the present invention. In the graph (400), there is horizontal section (401) and a vertical section (402). The horizontal section (401) represents width of distributed light beam (403) and vertical section (402) represents area of distributed light beam (403). The rough textured surface of light guide with segmented walls (303) provides bouncing and mixing up of light rays. Due to this, there is prevention towards accumulation of light rays in the light guide with segmented walls (303). Further, this structure also ensures reflection of the light rays in accordance with principle of total internal reflection. In furtherance of this material, shape and surface of light guide with segmented walls (303) ensures maximum surface area provision for light rays to travel through. Thereby, projected light beam from outlet port (304) in light guide with segmented walls (303) is distributed uniformly, homogeneously and evenly on road surface, thus, making objects visible to the vehicle driver. Hence, there are homogeneities present in projected light beam (403) from the present invention.

Fig. 5 illustrates a method of illumination of a surface from the novel anti-glare device with improved homogeneity (500) having a light guide with segmented walls (303) which includes:
• At step (501), incident light rays from light source (301) that will fall on inlet port (302) and thereafter will enter inside light guide with segmented walls (303). The light rays from the light source will falls onto inlet port (302) which is structured in such way to provide maximally receiving of light rays;
• At step (502), the light rays will move inside the light guide with segmented walls (303) for reflection as the light guide provides a path for reflection of light rays;
• At step (503), projects light beam from outlet port (304) after reflection from the light guide with segmented walls (303);
• At step (504), illuminates the road surface by distributing light beam from the outlet port (304).

In the first step (501), light rays from the light source (301) are incident onto inlet port (302). The light source (301) is oriented at a pre-determined angle with respect to inlet port (302) for proper incident of light rays. This ensures maximally receiving of light rays from the light source (301) by inlet port (302).

Further, at step (502), the light rays are provided path for travelling through the light guide with segmented walls (303). Further, the light guide with segmented walls (303) has a rough textured surface (as shown in Fig. 3(b) wherein irregularity of roughness is in wavy form [303(a)]. There is pre-determined distance between any two consecutive crusts in the waves of rough textured surface in light guide with segmented walls (303). Once light rays strike rough textured surface of light guide with segmented walls (303), it causes light rays to bounce. This bouncing also ensures mixing up of the light rays inside light guide with segmented walls (303). In furtherance of this, bouncing, reflecting and mixing of light rays ensures that rough textured surface [303(a)] of light guide with segmented walls (303) provides hindrance towards accumulation of reflected light rays in any portion of its internal surface. Further, this structure also ensures reflection of the light rays in accordance with principle of total internal reflection. In other words, light rays received in rough textured surface of light guide (303) will strike at different region to avoid concentration of light rays i.e. there is no accumulation of light at a single place. This reflected light rays formed within light guide with segmented walls (303) progress towards outlet port (304).

Thereafter at step (503), projects the light beam from outlet port (304) of the light guide with segmented walls (303).

Then at step (504), the surface and specially the road surface is illuminated by the light beam in an uniform manner. The resultant output light beam is homogeneous, evenly in nature and also improves visibility of the driver. Also, the resultant light beam has feature of an improved luminous efficiency.
Advantageously, characteristics of the present inventions ensures that reflected light rays in the light guide with segmented walls has an improved luminous intensity. This further ensures that in the resultant output light beam there is no excessive contrast between dark areas and bright areas in the direction of viewing and will not result into glare of lights in eyes of the oncoming and proceeding vehicle driver. Thereby, preventing collision of vehicles due to improved visibility of oncoming and proceeding vehicle driver. Hence, it ensures that safety of oncoming and proceeding vehicle driver is not hampered.

A description of an embodiment with several components in communication with each other does not imply that all such components are required. On the contrary, a variety of optional components are described to illustrate the wide variety of possible embodiments of the invention. The present disclosure may be realized in a centralized fashion, in at least one processing system, or in a distributed fashion, where different elements may be spread across several interconnected systems or circuits connected to the optical system.

A person with ordinary skills in the art will appreciate that the systems, circuit elements, modules, and sub-modules have been illustrated and explained to serve as examples and should not be considered limiting in any manner. It will be further appreciated that the variants of the above disclosed circuit elements, modules, and other features and functions, or alternatives thereof, may be combined to create other different systems or applications.

While the present disclosure has been described with reference to certain embodiments and exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the present disclosure. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present disclosure without departing from its scope.

,CLAIMS:1. A novel anti-glare device with improved homogeneity (300) for automobile comprising:
• a plurality of light source (301);
• a plurality of light guide with segmented walls (303), wherein the light guide (303) with segmented walls has a snake skin structure to provide segments on external side and a rough textured surface on internal side for total internal reflection; and
• a plurality of an inlet port (302) and a plurality of an outlet port (304) linked to the light guide with segmented walls (303).

2. The novel anti-glare device as claimed in claim 1, wherein the light source (301) is oriented at a pre-determined angle with respect to the inlet port (302) of light guide with segmented walls (303).
3. The novel anti-glare device as claimed in claim 2, wherein the light source (301) is oriented at a range of angle of 45-90 degree with respect to the inlet port (302) of light guide with segmented walls (303).
4. The novel anti-glare device as claimed in claim 2, wherein the inlet port (302) is configured for maximally receiving of light rays as emitted by the light source (301).
5. The novel anti-glare device as claimed in claim 1, wherein the light guide with segmented walls (303) is parabolic shaped with a curvature of pre-determined angle.
6. The novel anti-glare device as claimed in claim 5, wherein the light guide has a curvature of an angle that is based on fulfilling conditions of total internal reflection.
7. The novel anti-glare device as claimed in claim 1, wherein the light guide is located at a pre-determined distance from the inlet port (302).
8. The novel anti-glare device as claimed in claim 7, wherein the light guide is located at a distance of 0- 0.5mm from the inlet port (302).
9. The novel anti-glare device as claimed in claim 1, wherein the rough textured surface of light guide (303) is configured to provide an action of bouncing, reflection, and mixing of light rays.
10. The novel anti-glare device as claimed in claim 1, wherein the inlet port (302) and outlet port (304) are located at a pre-determined distance from each other and at front end and rear end of the light guide (303).
11. The novel anti-glare device as claimed in claim 10, wherein the distance between the outlet port (304) and inlet port (302) depends on shape of the light guide with segmented walls (303) and area of usage of the novel anti-glare device and is in range of 10-150 mm .
12. The novel anti-glare device as claimed in claim 10, wherein the inlet port (302) and the outlet port (304) have a pre-defined diameter of range of 2-20mm.
13. The novel anti-glare device as claimed in claim 8, wherein the outlet port (304) is configured to provide projection of light beam.
14. A method of illuminating a surface using a novel anti-glare device (300) having a light guide with segmented walls, wherein the method comprising:
- providing incident light rays from a light source (301) that will fall onto an inlet port (302) of a light guide with segmented walls (303);
- providing path inside a rough textured surface of light guide with segmented walls (303) for reflection of light rays;
- providing bouncing, reflecting and mixing of light rays inside a rough textured surface of light guide with segmented walls (303)
- also providing total internal reflection inside the light guide with segmented walls (303);
- projecting light beam from an outlet port (304) of the light guide with segmented walls (303); and
- thereby, illuminating surface by uniformly distributing light beam from the outlet port (304) of light guide with segmented walls (303).
15. The method of illuminating a surface as claimed in claim 14, wherein light rays emitted by the light source (301) are striking at different region of the rough textured surface of light guide with segmented walls (303).
16. The method of illumination of road surface as claimed in claim 10, wherein the light beam from the outlet port (304) is uniform, homogeneous, and has an improved luminous efficiency.