TECHNICAL FIELD
The present subject matter at least pertains to providing luminaries or light guides for power or data transfer receptacles or ports such as USB, HDMI, LAN ports, and in particular relates to improving aesthetics and visibility of such ports.

BACKGROUND
Presence of receptacles (hereinafter interchangeably referred to as ports or interfaces or outlets) such as USB, HDMI, LAN ports in computing or non-computing devices is commonplace for facilitating data transfer and/or acting as a power outlet. Yet, owing to extremely small-size of such USB, HDMI, LAN ports when compared with the device that hosts such ports, a user often faces difficulty in locating such ports. The problem especially worsens when such ports are implemented within a computing device such as desktop and mobile device or a dashboard of a vehicle and there is complete absence of daylight or street light. Accordingly, the user has no other option but to use an external lightening source such as a torch, overhead lighting, etc., or move into an illuminated area to locate the port.

At least to address such problem, manufacturers of USB, HDMI, LAN ports have off late provided an illuminant within the ports to facilitate detection. However, such kind of illumination remains far below satisfactory-levels and one may observe intermittent dark-patches or hot spots, showing irregularity of light-intensity. Moreover, the user may be confused during the operation of using such ports, since there remains an unbalanced configuration or disjoint between the shape of the port and the illumination as imparted. Moreover, the existing ports and an arrangement thereof in the devices is not IP67 compliant or waterproof in nature. Therefore, both the ports and the illumination are prone to easy damage in wet conditions.

Thus, there is a need for a solution to overcome abovementioned problems.

SUMMARY
This summary is provided to introduce a selection of concepts in a simplified format that are further described in the detailed description of the present subject matter. This summary is not intended to identify key or essential inventive concepts of the present subject matter, nor is it intended for determining the scope of the present subject matter. In accordance with the purposes of the disclosure, the present subject matter as embodied and broadly described herein describes a ring-shaped light guide for port such as power outlet/port and data transfer ports.

In an embodiment, the present subject matter describes a ring-shaped light guide or luminary for highlighting presence of a power or data transfer receptacle in an assembly. The ring-shaped light guide encircles or borders and the object. The ring-shaped light guide comprises a ring-shaped frame adapted to encircle the port and to provide a light guiding path. The ring-shaped light guide comprises a plurality of light reflecting elements disposed on the ring-shaped frame. Each of the plurality of light reflecting elements having at least two faces. The ring-shaped light guide comprises a pocket is adapted to accommodate a plurality of light sources. The pocket is disposed offset from the plurality of light reflecting elements within the ring-shaped frame. The light guiding path is adapted to direct a light emitted by the plurality of light sources towards the plurality of light reflecting elements to cause a propagation of the light throughout the ring-shaped frame.

The ring-shaped light guide further comprises an illuminating panel adapted to dispose on a front portion of the ring-shaped frame. The illuminating panel is to illuminate upon propagation of the light throughout the ring-shaped frame. Further, the ring-shaped frame is overlaid by a cap member adapted to cover the port. The cap member is having a first coloured portion and second coloured portion such that the first coloured portion is overlaid on the illuminating panel.

The advantages of the present subject matter includes, but not limited to, rendering continuous illumination surrounding the port for guiding a user towards the port and facilitating aesthetics thereof. Further, the object i.e., power port and data transfer port is augmented with a multi-coloured cap member to protect the port during non-usage and still maintain the illumination around the port as dual-coloured cover allows illumination from the ring-shaped light guide.

To further clarify advantages and features of the present subject matter, a more particular description of the present subject matter will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawing. It is appreciated that these drawings depict only typical embodiments of the present subject matter and are therefore not to be considered limiting its scope. The present subject matter will be described and explained with additional specificity and detail with the accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS
These and other features, aspects, and advantages of the present subject matter will become better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings, wherein:

Fig. 1 illustrates an exploded-view of an assembly of USB port;
Fig. 2 illustrates a perspective-view of housing for the assembly of Fig. 1;
Fig. 3 (a to b) illustrates a front and rear view of a ring-shaped light guide, in accordance with an embodiment of the present subject matter;
Fig. 4 illustrates an LED based light-assembly for providing a light source for the ring-shaped light guide, in accordance with an embodiment of the present subject matter;
Fig. 5 (a to c) illustrates placement of LED sources in a pocket provided at a predetermined location of the ring-shaped light guide and a consequent illumination of the ring-shaped light guide, in accordance with an embodiment of the present subject matter;
Fig. 6 illustrates a rear-side view of the assembly depicting a rear view of the ring-shaped light guide, in accordance with an embodiment of the present subject matter;
Fig. 7 (a and b) illustrates a perspective view of a cap member for the assembly of USB port, in accordance with an embodiment of the present subject matter;
Fig. 8 illustrates rear and front view of the ring-shaped light guide for depicting rectangular prism present therein, in accordance with an embodiment of the present subject matter;
Fig. 9(a to c) illustrate rear and front view of the ring-shaped light guide, in accordance with an embodiment of the present subject matter;
Fig. 10 (a to b) illustrates a front and rear view of a ring-shaped light guide, in accordance with another embodiment of the present subject matter;
Fig. 11 (a to b) illustrates sectional views of the ring-shaped light guide, in accordance with another embodiment of the present subject matter; and
Fig. 12 (a to d) illustrates simulation results based on different angular configurations of prisms of the light guide, in accordance with an embodiment of the present subject matter.

Further, skilled artisans will appreciate that elements in the drawings are illustrated for simplicity and may not have been necessarily been drawn to scale. For example, the flow charts illustrate the method in terms of the most prominent steps involved to help to improve understanding of aspects of the present subject matter. Furthermore, in terms of the construction of the device, one or more components of the device may have been represented in the drawings by conventional symbols, and the drawings may show only those specific details that are pertinent to understanding the embodiments of the present subject matter so as not to obscure the drawings with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.

DETAILED DESCRIPTION OF DRAWINGS
For the purpose of promoting an understanding of the principles of the subject matter, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the subject matter is thereby intended, such alterations and further modifications in the illustrated system, and such further applications of the principles of the subject matter as illustrated therein being contemplated as would normally occur to one skilled in the art to which the subject matter relates.

It will be understood by those skilled in the art that the foregoing general description and the following detailed description are explanatory of the subject matter and are not intended to be restrictive thereof.

Reference throughout this specification to “an aspect”, “another aspect” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present subject matter. Thus, appearances of the phrase “in an embodiment”, “in another embodiment” and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.
The terms "comprises", "comprising", or any other variations thereof, are intended to cover a nonexclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such process or method. Similarly, one or more devices or subsystems or elements or structures or components proceeded by "comprises... a" does not, without more constraints, preclude the existence of other devices or other sub-systems or other elements or other structures or other components or additional devices or additional sub-systems or additional elements or additional structures or additional components.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this subject matter belongs. The system, methods, and examples provided herein are illustrative only and not intended to be limiting.

Embodiments of the present subject matter will be described below in detail with reference to the accompanying drawings. While the forthcoming description illustrates the luminary in respect of Universal Serial Bus (USB) port, the same may be construed to cover HDMI port, LAN port, other analogous data transfer and/or power ports (hereinafter interchangeably referred to as outlets or receptacles or interfaces).

Fig. 1 illustrates an exploded-view of a USB assembly 100. The USB assembly 100 may be employed in electronic devices such as desktop, laptop, smartphones, tablets, etc., electro-mechanical devices, and in particular on vehicles such as two wheelers, three wheelers, four wheelers, commercial vehicles, and off-road vehicles. As indicated in the figure, the USB assembly 100 is composed of a housing 102, a ring-shaped light guide 104 having a pocket 106, a plurality of light sources 108, a Printed Circuit Board (PCB) assembly 110 supporting the plurality of light sources 108 and a USB port or receptacle112, and a wire-harness 114. It would be understood that the USB assembly 100 may include further components as required for functioning of the USB assembly 100. The ring-shaped light guide 102 may be insert-molded on the housing 102. Further, epoxy or liquid sealant may be applied over the PCB assembly 110 for resisting ingress of water, dust, any foreign-particle accumulation. A cap member 116 is coupled with the housing 102 to cover or protect the USB port 112.

Fig. 2 illustrates a perspective-view of the housing 102 for the USB assembly 100 of Fig. 1, thereby depicting a ring-shaped illumination-provision 202 for rendering uniform-illumination over a surface of the USB port 112, and avoiding hot spots or any irregularity across the surface of illumination. Further, the housing 102 has electrical outlet 204 for connecting to a power-source (not shown in the figure), for example, a battery.

Fig. 3a illustrates a front view of the ring-shaped light guide 104 and Fig. 3b illustrates a rear view of the ring-shaped light guide 104 (or interchangeably referred to as ring-shaped luminary), in accordance with an embodiment of the present subject matter. The ring-shaped light guide 104 at least provides a solution to overcome irregular light intensity over the surface of the USB port 112. As indicated in the figure, the ring-shaped light guide 104 includes a ring-shaped frame 302 adapted to encircle the port 112 and to provide a light guiding path.

The ring-shaped light guide 104 includes plurality of light reflecting elements 304 disposed on the ring-shaped frame 302. Each of the plurality of light reflecting elements 304 is having at least two faces. Examples of the plurality of light reflecting elements 304 include prism, rectangular notch, grooves, reflectors, wedge, and any other means or member capable of providing light internal reflection. In an example implementation, prism or rectangular notch are selected as the plurality of light reflecting elements 304 for the better internal reflection of the light rays.

The ring-shaped light guide 104 includes a pocket 306 (also referred to as “fixture” or the pocket 106) to accommodate the plurality of light sources 108 such as LED or any other analogous light-source. The pocket 306 is disposed at predetermined location (or elongated-location) of the ring to provide unique-illumination. The light guiding path is adapted to direct a light emitted by the plurality of light sources 108 towards the plurality of light reflecting elements 304 to cause a propagation of the light throughout the ring-shaped frame 302. The plurality of light reflecting elements 304 are arranged on a rear portion of the ring-shaped frame 302 and along a circumference of the ring-shaped frame 302. This improves the propagation of the light rays over the light guiding path.

The ring-shaped light guide 104 includes an illuminating panel 308 adapted to dispose on a front portion of the ring-shaped frame 302. The illuminating panel 308 is to illuminate upon propagation of the light throughout the ring-shaped frame 302. The illuminating panel 308 can be made of any transparent material, such as transparent polycarbonate (PC), transparent plastic material, or any other rubber material, which is painted white.

Fig. 4 illustrates a light-assembly 402 for providing the plurality of light sources 108 for the ring-shaped light guide 104, in accordance with an embodiment of the present subject matter. The light assembly 402 includes the plurality of light sources 108 such as LED (e.g. dual LED’s) or any other similar light sources other than LED’s, the PCB assembly 110 supporting the plurality of light sources 108 and the USB port or receptacle112, and the wire-harness 114. In another embodiment, more than two LED’s can be placed in any direction inside the pocket. The plurality of light sources 108 is preferably white, but not limited to white. In one embodiment, the plurality of light sources 108 can be placed or integrated within the PCB assembly 110. In another embodiment, the plurality of light sources 108 can be placed or integrated in a separate dedicated light sub-assembly, which may then be connected with the PCB assembly 110.

Fig. 5a illustrates placement of the plurality of light sources 108 in the ring-shaped light guide 104, in accordance with an embodiment of the present subject matter. As indicated in the figure, the PCB assembly 110 comprising the plurality of light sources 108 is mounted in the pocket 306 provided at the predetermined location of the ring-shaped light guide 104. The pocket 306 can be placed in the any elongated location or section of the ring-shaped light guide 104.

In operation, as depicted in Fig. 5b, the light rays from the plurality of light sources 108 travel through the light guiding path provided by the ring-shaped frame 302, represented by arrows, using internal reflection by the arrangement of the plurality of light reflecting elements 304 over the back or rear side of the ring-shaped frame 302.

Fig. 5c illustrates a luminary 502 as known in the art to illuminate the USB port. As shown in Fig. 5c, the prior art based luminary exhibits dark spots during the illumination and accordingly does not exhibit a continuous illuminated ring.

Fig. 5d illustrates a resultant ring-shaped illumination of the ring-shaped light guide 104 based on the propagation of light rays therein. The ring-shaped light guide 104 is continuously-lit and accordingly devoid of dark-spots due to the better propagation of light through the light guiding path and reflection by the plurality of light reflecting elements 304.

Fig. 6 illustrates a rear-side view of the USB assembly 100 depicting the rear view of ring-shaped light guide 104, in accordance with an embodiment of the present subject matter. The ring-shaped light guide 104 is insert-moulded within the housing 102. In another aspect of the present subject matter, the ring-shaped light guide 104 can be attached to the housing 102 by means of snap-fitting, or ultrasonic welded or glue or adhesive attachment or any other anaglous attaching means.

Fig. 7a illustrates the cap member 116 for the USB assembly 100, in accordance with an embodiment of the present subject matter. In an example, the cap member 116 has a central raised portion and has opening guide and two side deformation for aesthetics.

If the cap/cover is transparent and illuminated from bottom side by some light source like a illumination ring, it does not appear uniform and is distorted by various contours provided. In present embodiment, complete cap surface appears black (or any other colour) except for ring portion which is illuminated from bottom by the ring-shaped light guide 104. The cap member 116 is having a first coloured portion 702 and second coloured portion 701. The first coloured portion 702 is painted white and the second coloured portion 704 is painted any other colour. The first coloured portion 702 is overlaid on the illuminating panel 308 such that the first coloured portion 702 is illuminated from bottom by the ring-shaped light guide 104. As such, the first coloured portion 702 and the illuminating panel 308 have same shape and dimensions.

In an example, the cap member 116 is moulded from a transparent polycarbonate (PC) or any other similar plastic material or any other rubber material, which is painted white and then black in a sequence, such that the first coloured portion 702 is laser etched up in white-paint or screen printed in white colour. Accordingly, the cap member 116 has an elliptical laser etched white coloured portion 702 to facilitate uniform illumination over the cap member 116. While the overall cap member 116 appears black, the ring portion or the first coloured portion 702 appears white in daylight. In dark, the ring portion or the first coloured portion 702 illuminates with same colour of the plurality of light sources 108 while the second coloured portion 704 appears black. In an alternative embodiment, the ring portion or the first coloured portion 702 may be coloured or painted in different visible colours available such as lite green, yellow, etc., so that user or rider will able to see different kind of colours in the cap member 116 of electrical ports or outlets. This way considerably uniformity of illuminating ring is achieved which otherwise is not possible if completely transparent cap is illuminated from the below disposed ring-shaped light guide 104. The cap member 116 may be attached with the housing 102 and locks/covers the surface of the housing 102 by means of snap lock, spring action, or any other locking/covering/fastening means. In other example, the housing 102 may be moulded or coloured in white colour or other similar light colour to achieve better uniformity of illumination.

Further, Fig. 7b illustrates an illuminated state 706 of the ring portion or the first coloured portion 702 in Fig. 7a, which is in turn due to the illuminated state of ring-shaped light guide 104.

Fig. 8a illustrates a rear view of the ring-shaped light guide 104 and Fig. 8b illustrates a front view of ring-shaped light guide 104, in accordance with an embodiment of the present subject matter. A light guiding path 802 of the ring-shaped light guide 104 is substantially wider than the illuminating panel 308 to accommodate the plurality of light reflecting elements 304. The light guiding path 802 is a horizontal light guiding path having a curvature tangential to the ring-shaped light guide 104. Thus, the light guiding path 802 includes curves/bends at the corner to guide the light from the plurality of light sources 108.

As shown in Fig. 8a, the light guiding path 802 incudes curves/bends at the corner. The inner curve and the outer curve of light guiding path 802 are tangent to the inner curves and the outer curves of the illuminating panel 308. Portion A1 illustrates sectional-view of the ring-shaped light guide 104 cut along a section C-C on the rear. Portion A2 illustrates sectional-view of the ring-shaped light guide 104 cut along a section D-D on the rear.

In an embodiment, the plurality of light reflecting elements is prism. As such, the thickness of the ring-shaped frame 302 is kept 2.5mm and the depth of prism is 0.15mm. The prisms are uniformly distributed on circumference of the ring-shaped frame 302 and an angle of one side or face of the prism is kept constant at 80-degree. A pitch-angle of prism is also kept constant.

As shown in Fig. 8b, the ring-shaped frame 302 comprises a pair of opposing notches 804, 806 disposed laterally with respect to the pocket 306 and at the front of the horizontal light guiding path 802. The pair of opposing notches 804, 806 adapted to direct the light emitted by the plurality of light sources 108 towards the plurality of light reflecting elements 304. This provides a long path for the light to reach an illuminating panel 308 and increase level of light intensity at the illuminating panel 308.

Further, a portion of material is removed from the ring-shaped frame 302 and a void is created at portion 808 so that light intensity at left and right surfaces 810-1, 810-2 of ring-shaped frame 302, respectively, is minimized which otherwise receives the maximum intensity of light emitted due to close proximity with the plurality of light sources 108. The width ‘w’ of a portion 812 of the ring-shaped frame 302 below the light guiding path 802 is kept considerably low to prevent a middle portion 814 of the ring-shaped frame 302 from receiving too much light.

Fig. 9a illustrates a rear view of the ring-shaped light guide 104, in accordance with an embodiment of the present subject matter. As depicted in Fig. 9a, an optimum gap between two prisms or the plurality of light reflecting elements is in the range of 0.5 millimetres to 0.7 millimetres.

Fig. 9b illustrates portion A3, which is a sectional-view of the ring-shaped light guide 104 cut along a section C-C on the rear. Fig. 9c illustrated portion A4, which is enlarged view of the encircled portion depicted in Fig. 9b, thereby depicting a series of ‘single prism’ arrangement having two angles defined as alpha and beta angle.

Fig 10a illustrates a front of a ring-shaped light guide 1000, in accordance with another embodiment of the present subject matter. Fig 10b illustrates a rear view of the ring-shaped light guide 1000, in accordance with another embodiment of the present subject matter. As indicated in the figure, the ring-shaped light guide 104 includes a ring-shaped frame 1002 adapted to encircle the port 112.

The ring-shaped light guide 1000 includes the plurality of light reflecting elements 1004 disposed on the ring-shaped frame 1002. Each of the plurality of light reflecting elements 1004 is having at least two faces. Examples of the plurality of light reflecting elements 1004 include prism, serrations, rectangular notch, grooves, reflectors, wedge, and any other means or member capable of providing light internal reflection. In an example implementation, prism or rectangular notches are selected as the plurality of light reflecting elements 1004 for the better internal reflection of the light rays.

The ring-shaped light guide 1000 includes pocket 1006 (also referred to as “fixture”) to accommodate the plurality of light sources 108 such as LED or any other analogous light-source). The pocket 302 is disposed at predetermined location (or elongated-location) of the ring to provide unique-illumination.

The light rays from the plurality of light sources 108 travel through the light guiding path provided by the ring-shaped frame 1002, represented by arrows, using internal reflection by the arrangement of the plurality of light reflecting elements 304 over the back or rear side of the ring-shaped frame 1002. The ring-shaped frame 1002 includes an illuminating panel 1008 adapted to dispose on the front portion of the ring-shaped frame 302. The illuminating panel 1008 is to illuminate upon propagation of the light throughout the ring-shaped frame 1002.

In accordance with the present embodiment, the ring-shaped frame 1002 includes a middle portion 1010, a central protrusion 1012, a top portion 1014, a bottom portion 1016, a side wall 1018 of the central protrusion 1012, and a side wall 1020 adjoining of the plurality of light reflecting elements 1004. The middle portion 1010, the central protrusion 1012, the top portion 1014, the bottom portion 1016, the side wall 1018, and the side wall 1020 form a light guiding path of the ring-shaped frame 1002.

The middle portion 1010 is provided with depression on both sides. The depression at the middle portion 1010 can be adjusted in combination with other parameters to control an illumination level to provide a desired illumination level since a higher range of depression will result in less light reaching or travelling to the illuminating panel 1008. Therefore, a width of the depression is limited by the central protrusion 1012 on one side and the side wall 1020 on other side. Examples of the parameters include geometry of the ring-shaped light guide 1000 and location of the plurality of light sources 108. In an example, width of the depression at the central protrusion is lesser than a width of the depression at the top portion 1014 and the bottom portion 1016. In another example, the depression is made up to the top portion 1014 to achieve desired intensity level at the top portion 1014. In an example, the depression is made terminated at the middle portion 1010.

The central protrusion 1012 is a raised portion. Characteristics of the central protrusion 1012 can be varied to change width of depression of the middle portion 1010 to control the illumination level. The characteristics include shape, width, and height. The central protrusion 1012 is provided with more cross section. This enables the light from the plurality of light sources 108 to travel easily through the central protrusion 1012 such that the top portion 1014 receives maximum light than the bottom portion 1016.

Fig. 11a and Fig. 11b illustrates rear views of the ring-shaped light guide 1000, in accordance with another embodiment of the present subject. In the embodiment, the plurality of light reflecting elements is serrations or notches.

Referring to Fig. 11a, portion A5 illustrates a sectional view of the ring-shaped light guide 104 cut along a section B-B on the rear. The serrations or notches are uniformly distributed on circumference of the ring-shaped frame 1002. The serrations or notches are kept symmetrical and angle of both the sides or faces are constant at 45-degree.

Referring to Fig. 11b, portion A6 illustrates a sectional view of the ring-shaped light guide 104 cut along a section A-A on the rear. The central protrusion 1012 has thickness W4, depression depth W1 from front side, depression depth W3 from rear side, and thickness W2 towards the top. The thickness W4 of the central protrusion 1012 is substantially higher than the thickness W2 of the central protrusion 1012 such that the central protrusion 1012 has maximum cross-section to carry maximum light to the top portion 1014.

Fig 12a to Fig. 12d illustrates simulation results based on different angular configurations of prisms within the ring-shaped light guide 104, in accordance with an embodiment of the present subject matter. As determined with respect to an experimental operation of the present ring-shaped light guide 104 or ring-shaped luminary, an optimum range of alpha ‘a’ angle for the Prism lies between 5-degree to 15- degree. In respect of beta ‘ß’ angle of Prism, an optimum range lies in between 15-degree to 50-degree to get uniform illumination over the ring portion or first coloured portion 702 of the cap member 116.

Fig 12a to Fig. 12d illustrates few example values for the pair of prism ‘a’ and ‘ß’ angles, and accordingly represents the resulting distribution of illumination intensity (in lux) across the light guide or the ring-shaped luminary. In the illustrated figures, blue colour represents low intensity and red colour represents the highest intensity. As can be observed, a uniform distribution of illumination intensity is obtained when the alpha ‘a’ angle of the prism is at 10-degree and the beta ‘ß’ angle of the prism is at 15-degree.

The drawings and the forgoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment. For example, orders of processes described herein may be changed and are not limited to the manner described herein. Moreover, the actions of any flow diagram need not be implemented in the order shown; nor do all of the acts necessarily need to be performed. Also, those acts that are not dependent on other acts may be performed in parallel with the other acts. The scope of embodiments is by no means limited by these specific examples. Numerous variations, whether explicitly given in the specification or not, such as differences in structure, dimension, and use of material, are possible. The scope of embodiments is at least as broad as given by the following claims. Benefits, other advantages, and solutions to problems have been described above with regard to specific embodiments. However, the benefits, advantages, solutions to problems, and any component(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential feature or component of any or all the claims.

WE CLAIM:
1. A ring-shaped light guide (104) comprising:
a ring-shaped frame (302) adapted to encircle a port and to provide a light guiding path (802);
a plurality of light reflecting elements (304) disposed on the ring-shaped frame, each of the plurality of light reflecting elements having at least two faces;
a pocket (306) adapted to accommodate a plurality of light sources, said pocket disposed offset from the plurality of light reflecting elements within the ring-shaped frame; and
wherein the light guiding path is adapted to direct a light emitted by the plurality of light sources towards the plurality of light reflecting elements to cause a propagation of the light throughout the ring-shaped frame.

2. The ring-shaped light guide (104) as claimed in claim 1, wherein the each of the plurality of light reflecting elements is a prism, the prism having an alpha angle in the range of 5-degrees to 15-degrees and a beta angle in the range of 15-degrees to 50-degrees.

3. The ring-shaped light guide (104) as claimed in claim 1, wherein the each of the plurality of light reflecting elements is a notch, the notch having an alpha angle of 45-degrees and a beta angle of 45 degree.

4. The ring-shaped light guide (104) as claimed in claim 1, wherein a gap between the plurality of light reflecting elements is in the range of 0.5 millimetres to 0.7 millimetres.

5. The ring-shaped light guide (104) as claimed in claim 1, wherein the light guiding path is a horizontal light guiding path having a curvature tangential to the ring-shaped light guide.

6. The ring-shaped light guide (104) as claimed in claim 1, wherein the light guiding path comprises a middle portion (1010) having a depression, a central protrusion (1012), a top portion (1014), a bottom portion (1016), a side wall (1018) of the central protrusion (1010), and a side wall (1020) adjoining of the plurality of light reflecting elements.

7. The ring-shaped light guide (104) as claimed in claim 1, wherein the light reflecting elements are arranged on a rear portion of the ring-shaped frame and along a circumference of the ring-shaped frame.

8. The ring-shaped light guide (104) as claimed in claim 1, wherein the pocket is disposed at an elongated area on a rear portion of the ring-shaped frame.

9. The ring-shaped light guide (104) as claimed in claim 1, wherein the ring-shaped frame comprises a pair of opposing notches (804, 806) disposed laterally with respect to the pocket and adapted to direct the light emitted by the plurality of light sources towards the plurality of light reflecting elements.

10. The ring-shaped light guide (104) as claimed in claim 1, comprises:
an illuminating panel (308) adapted to dispose on a front portion of the ring-shaped frame and to illuminate upon propagation of the light throughout the ring-shaped frame.

11. The ring-shaped light guide (104) as claimed in claim 7, wherein the ring-shaped frame is overlaid by a cap member (116) having a first coloured portion and second coloured portion such that the first coloured portion is overlaid on the illuminating panel, the cap member covering the port.