DESC:FIELD OF THE INVENTION

The present disclosure relates to a lighting apparatus and more particularly, relates to a lighting apparatus having a frame with a stepped profile.

BACKGROUND

Large sized lighting devices are used to illuminate large space. One type of large sized lighting devices includes a stadium light that is employed to illuminate a stadium, such as a cricket stadium. The stadium light generally includes frame and a plurality of light emitting panels, such as light bulbs arranged in an array within the frame to provide the illumination. Such lighting devices are designed to output high luminescence light and as a result, the lighting devices generates a great amount of heat. The lighting device employ heat sinks that removes the generated heat from the light sources to air surrounding the heat sink.

There are various limitations associated with the current type of lighting device. For instance, air that has received heat from one heat sink tends to enter into another heat sink thereby reducing the heat dissipation capacity of the other heat sink. One of the ways to mitigate this issue is to increase a gap between subsequent lighting unit to minimise the air flow therebetween. However, increase the gap increases an overall size of the stadium light. Another way to mitigate the issue is to make heat sink of different size to minimize the air flow therebetween. In such a configuration, the reduction in the size of heat sink reduces the heat dissipation capacity of the heat sink.

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 invention. This summary is neither intended to identify key or essential inventive concepts of the invention and nor is it intended for determining the scope of the invention.

In an embodiment, a lighting apparatus is disclosed that includes a frame including a plurality of holders and a plurality of lighting unit disposed in the plurality of holders . Further, the plurality of holders is disposed along a height of the frame to form a stepped profile.

According to the present disclosure, the stepped profile ensures that the air flow through heat sink of a set of the lighting units does not enter the heat sink of other lighting units installed in the consecutive holder. As a result, the flow of air, upon receiving the heat from one heat sink does not come in contact with other heat sink and therefore, the heat is efficiently dissipated from the lighting apparatus.

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

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features, aspects, and advantages of the present invention 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:

Figure 1 illustrates different views of a lighting apparatus, according to an embodiment of the present disclosure;
Figure 2 illustrates a partial view of the light apparatus with end cap removed, according to an embodiment of the present disclosure; and
Figure 3 illustrates a detailed schematic of a cut section taken along line 1-1 of Figure 1, according to an embodiment of the present disclosure.

Further, skilled artisans will appreciate that elements in the drawings are illustrated for simplicity and may not have necessarily been drawn to scale. 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 invention 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 FIGURES

For the purpose of promoting an understanding of the principles of the invention, 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 invention is thereby intended, such alterations and further modifications in the illustrated system, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skilled in the art to which invention belongs. The system and examples provided herein are illustrative only and not intended to be limiting.

For example, the term “some” as used herein may be understood as “none” or “one” or “more than one” or “all.” Therefore, the terms “none,” “one,” “more than one,” “more than one, but not all” or “all” would fall under the definition of “some.” It should be appreciated by a person skilled in the art that the terminology and structure employed herein is for describing, teaching, and illuminating some embodiments and their specific features and elements and therefore, should not be construed to limit, restrict, or reduce the spirit and scope of the present disclosure in any way.

For example, any terms used herein such as, “includes,” “comprises,” “has,” “consists,” and similar grammatical variants do not specify an exact limitation or restriction, and certainly do not exclude the possible addition of one or more features or elements, unless otherwise stated. Further, such terms must not be taken to exclude the possible removal of one or more of the listed features and elements, unless otherwise stated, for example, by using the limiting language including, but not limited to, “must comprise” or “needs to include.”

Whether or not a certain feature or element was limited to being used only once, it may still be referred to as “one or more features” or “one or more elements” or “at least one feature” or “at least one element.” Furthermore, the use of the terms “one or more” or “at least one” feature or element do not preclude there being none of that feature or element, unless otherwise specified by limiting language including, but not limited to, “there needs to be one or more...” or “one or more elements is required.”

Unless otherwise defined, all terms and especially any technical and/or scientific terms, used herein may be taken to have the same meaning as commonly understood by a person ordinarily skilled in the art.

Reference is made herein to some “embodiments.” It should be understood that an embodiment is an example of a possible implementation of any features and/or elements of the present disclosure. Some embodiments have been described for the purpose of explaining one or more of the potential ways in which the specific features and/or elements of the proposed disclosure fulfil the requirements of uniqueness, utility, and non-obviousness.

Use of the phrases and/or terms including, but not limited to, “a first embodiment,” “a further embodiment,” “an alternate embodiment,” “one embodiment,” “an embodiment,” “multiple embodiments,” “some embodiments,” “other embodiments,” “further embodiment”, “furthermore embodiment”, “additional embodiment” or other variants thereof do not necessarily refer to the same embodiments. Unless otherwise specified, one or more particular features and/or elements described in connection with one or more embodiments may be found in one embodiment, or may be found in more than one embodiment, or may be found in all embodiments, or may be found in no embodiments. Although one or more features and/or elements may be described herein in the context of only a single embodiment, or in the context of more than one embodiment, or in the context of all embodiments, the features and/or elements may instead be provided separately or in any appropriate combination or not at all. Conversely, any features and/or elements described in the context of separate embodiments may alternatively be realized as existing together in the context of a single embodiment.

Any particular and all details set forth herein are used in the context of some embodiments and therefore should not necessarily be taken as limiting factors to the proposed disclosure.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

For the sake of clarity, the first digit of a reference numeral of each component of the present disclosure is indicative of the Figure number, in which the corresponding component is shown. For example, reference numerals starting with digit “1” are shown at least in Figure 1. Similarly, reference numerals starting with digit “2” are shown at least in Figure 2.

Figure 1 illustrates a lighting apparatus 100, according to an embodiment of the present disclosure. Specifically, Figure 1 illustrates different views of an assembled lighting apparatus 100, i.e., a side view (A) and a close-up view (B) of an end of the lighting apparatus 100. The lighting apparatus 100 can be termed as a batten, owing to its shape. Further, the lighting apparatus 100 may be installed on a wall or may be suspended from a ceiling. In either case, the lighting apparatus 100 may provide adequate illumination to the surrounding space. The lighting apparatus 100 of the present disclosure is a compact device that has a similar lumen output as currently used bulky batten lights. The lighting apparatus 100 has various design implements which enable a compact design while maintaining the lumen output. One of the design attributes of the lighting apparatus 100 contributing to the higher lumen output is a greater area for reflective surfaces to maximise the light emission. Details of such attributes will be explained later.

The lighting apparatus 100 may include, but is not limited to, a housing 102, a first end cap 104, a second end cap 106, and a lighting cover 108. The housing 102 forms a major portion of the lighting apparatus 100 while the first end cap 104 and the second end cap 106 are attached to either end of the housing 102. As shown in Figure 1, the housing 102 forms the bottom part of the lighting apparatus 100 while the lighting cover 108 forms the top portion of the lighting apparatus 100. The housing 102 can be made of a material, such as plastic or metal like Aluminium and may house various components of the lighting apparatus 100. For instance, the housing 102 may house a driver unit that powers a light source of the lighting apparatus 100. In addition, the housing 102 may store the wires that connects the light source to the driver unit and wires that connect the driver unit to the mains power supply. Furthermore, the housing 102 is designed to mount the lighting apparatus 100 on either wall or a mount. Accordingly, the housing 102 may include holes for the wall or a clamp for the mount. In either case, the housing 102 can be secured effectively to the wall or the mount.

In one example, the lighting cover 108 is installed on the housing 102 and forms a top portion of the lighting apparatus 100. The lighting cover 108 is made of a translucent material that diffuses the light incident thereupon. Further, the lighting cover 108 is designed to diffuse the light to spread the illumination uniformly. The first end cap 104 and the second end cap 106 are plastic pieces installed on either end of the housing 102 and are configured to protect the internal components of the housing 102. As may be understood, the first end cap 104 and the second end cap 106 are shaped to complement the ends of the housing 102 as well as the lighting cover 108. Although not shown, the first end cap 104 and the second end cap 106 may include a hole for the wires from the mains power supply to enter the housing 102.

Referring now to Figures 2 and 3 which show a detailed schematic of the lighting apparatus 100. Specifically, Figure 2 illustrates a partial view of the light apparatus 100 with the one of end cap removed while Figure 3 illustrates a detailed schematic of a cut section taken along lines 1-1 in Figure 1. The housing 102 is the bottom portion of the lighting apparatus 100 while the lighting cover 108 is installed on the housing 102 and forms the top portion of the lighting apparatus 100. Further, the housing 102 includes holes 102A adapted to receive a fastener to mount the housing on a support surface.

The lighting apparatus 100 also includes a base 202 disposed between the housing 102 and the lighting cover 108 along the length of the housing 102 and the lighting cover 108. The base 202 may be installed to support the light source 204 thereon. The light lighting cove, in one example, can be a strip of light-emitting diodes (LEDs) that may be extended along a complete length of the base 202. The base 202 further includes a pair of lips 206 along its length to secure the light source 204 thereon. The lips 206 may have an L-shaped profile that prevents dislodgement of the light source 204 due to vibrations caused during installation, uninstallation, and transport.

The base 202 may include a longitudinal slot 208 that is formed at the centre of the base 202. The longitudinal slot 208 may also extend the complete length of the base 202. The base 202 also includes a pair of horizontal reflectors 210 on either side of the longitudinal slot 208. The pair of horizontal reflectors 210 are configured to reflect the incident light towards the lighting cover 108. For instance, the pair of horizontal reflectors 210 may reflect rays (shown as bold lines) incident thereupon as reflected rays (shown as dotted lines). The horizontal reflectors 210 have a top surface 210A made of a material that reflects almost all the light incident on the horizontal reflectors 210. In one example, the horizontal reflectors 210 can be substantially flat and parallel to the bottom of the housing 102 as shown in Figure 3. Alternatively, the horizontal reflectors 210 may be inclined as shown in Figure 2. In either case, the top surface 210A of the horizontal reflectors 210 reflects the light towards the lighting cover 108 thereby minimising the loss of light and increasing lumen output.

Further, a reflection of light incident on the horizontal reflectors 210 towards the lighting cover 108 enables the reduction in the height of the lighting cover 108 which reduces the overall height of the lighting apparatus. In one example, the height of the lighting apparatus 100 is about 32 millimetres (mm) whereas the height of the lighting cover 108 is about 11.63 mm which is about 1/3rd of the height of the lighting apparatus 100. In comparison to the currently used similar-sized batten in which the height of the light diffuser is almost half the height of the batten. Thus, smaller height lighting cover 108 allows for a small size lighting apparatus 100. Accordingly, the lighting apparatus 100 of the present disclosure has a better lumen output than a currently known similar-sized batten. Moreover, the lighting apparatus 100 has the same lumen output while being compact in size as compared to a currently known same lumen output rated but bulky batten. Moreover, the shorter height of the lighting apparatus 100 makes for a sleeker design thereby enhancing the aesthetics of the lighting apparatus 100.

In one example, the light source 204 includes a substrate 212 and a luminescent portion 214 disposed on the substrate 212. The substrate 212 can be a printed circuit board (PCB) while the luminescent portion 214 can be a plurality of light-emitting diodes (LEDs). The substrate 212 may be installed at a bottom of the longitudinal slot 208. Further, the substrate 212 is installed in the longitudinal slot 208 in such a way that the substrate 212 is completely housed within the longitudinal slot 208. In one example, the volume of the longitudinal slot is greater than the volume of the substrate and the height of the substrate is less than the depth of the longitudinal slot. Moreover, the pair of lips 206 overlaps a portion of the substrate 212 to prevent dislodgement of the substrate 212 from the longitudinal slot 208. In one example, the depth of the longitudinal slot 208 is about 1.3 mm while the width of the longitudinal slot 208 is about 6.5 mm. The longitudinal slot 208 is sized to ensure that the substrate 212 is secured inside the longitudinal slot 208.

On the other hand, the luminescent portion 214 is designed to emit light for diffusion by the lighting cover 108. In one example, the top of the luminescent portion 214 is flush with the top surface 210A of the flat reflectors 210 such that a continuous flat surface is achieved. Alternatively, the top of the luminescent portion 214 is lower than the top surface 210A of the flat reflectors 210. In such configurations, the light is not directly incident on the top surface 210A. Further, a portion of light reflected by the inner walls 108A is reflected the horizontal reflector 210 and the top surface 210A reflects back the portion of light incident thereupon for diffusion by the lighting cover 108.

Alternatively, the top of the luminescent portion 214 protrudes from the longitudinal slot 208, such that a portion of light emitted by the luminescent portion 214 is incident on the horizontal reflectors 210. As a result, the horizontal reflectors 210 are able to reflect the light towards the lighting cover 108 for diffusion. In this configuration, any portion of reflected light incident on the horizontal reflectors 210 is reflected back to the lighting cover 108 for diffusion.

In either of the aforementioned scenario, the lighting cover 108 receives light from both the luminescent portion 214 as well as the horizontal reflectors 210 thereby making the complete base 202 a source of light which results in uniform illumination and consequently, uniform diffusion. Moreover, uniform illumination, also prevented the localization of the light source and the position of the luminescent portion 214 within the lighting cover is concealed. Therefore, the reduction in the height of lighting cover 108 does not reveal the position of the luminescent portion 214.

While specific language has been used to describe the present disclosure, any limitations arising on account thereto, are not intended. As would be apparent to a person in the art, various working modifications may be made to the method in order to implement the inventive concept as taught herein. The drawings and the foregoing 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.

CLAIMS:

1. A lighting apparatus (100) comprising:
a frame (104) comprising a plurality of holders (124); and
a plurality of lighting units (106) disposed in the plurality of holders (124),
wherein the plurality of holders (124) is disposed along a height of the frame (104) to form a stepped profile.

2. The lighting apparatus (100) as claimed in claim 1, wherein consecutive holders (124) have a predetermined gap to allow unimpeded emission of light from the plurality of lighting units (106) in the consecutive holders (124).

3. The lighting apparatus (100) as claimed in claim 2, wherein each of the plurality of lighting units (106) comprises a light source and a heat diffuser (612) attached to a rear face of the light source and adapted to dissipate heat generated during an operation of the light source.

4. The lighting apparatus (100) as claimed in claim 3, wherein the heat diffuser (612) comprises a plurality of fins (620), each fin (620) comprises:
a first section (620A) detachably attached to the rear face of the light source; and
a second section (620B) extending from the first section (620A) and adapted to dissipate the heat.

5. The lighting apparatus (100) as claimed in claim 4, wherein a length of the fin (620) is less than a predetermined gap between consecutive holders (124) in the stepped profile.

6. The lighting apparatus (100) as claimed in claim 4, wherein second sections (620B) of adjacent fins (620) form a channel to pass air therethrough for heat dissipation.

7. The lighting apparatus (100) as claimed in claim 1, wherein a set of lighting units (106) from the plurality of lighting units (106) is disposed on a holder (124) of the plurality of holders (124).

8. The lighting apparatus (100) as claimed in claim 1, wherein the plurality of holders (124) extends horizontally along a width of the frame (104).