FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See section 10, rule 13)
1. Title of the Invention:
“A DUAL COLOR POSITION LAMP FOR AUTOMOTIVE
LIGHTING”
2. APPLICANT (S) -
(a) Name : Minda Rinder Pvt. Ltd.
(b) Nationality : Indian
(c)Address : Gat no. 148, Mhalunge Ingale, Off Chakan-
Talegaon Road, Dist. Pune - 410501, Maharashtra, India
The following specification particularly describes the invention and the manner in which it is to be performed.

Field of Invention
The invention relates to a position lamp for vehicles, and more particularly, to a dual color position lamps for the vehicles.
Background of the Invention
Position lamps are an automotive lighting component configured at the front and rear end of a vehicle. It acts as a safety feature as it highlights the extremities of a vehicle to other vehicles on road especially during dusk and dawn or in a bad weather, when it is not dark enough to necessitate the use of headlights. Also, when a vehicle is required to park at an undesignated parking spot, the position lamps play an important role in alerting other vehicles on road about the parked vehicle.
Position lamps are designed to operate with low power consumption so that they can be left ON for a long time. Conventionally, the rear position lamps emit light of red color and the front position lamps emit light either of white or amber color. Although, the single-color lamps fulfil the required purpose, there always exists a scope of improvement that is not only aesthetically appealing but also provides enhanced safety to a vehicle. Thus, the challenge is to how to improve the expressiveness of the position lamps to make the presence of the vehicle more visible to the roads.
The information disclosed in this background of the disclosure section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Objects of the Invention
An object of the present invention is to enhance the aesthetic appeal of a position lamp of a vehicle by providing a dual color light emission from the position lamp.
Another object of the present invention is to improve the safety of the vehicle by providing a highly expressive dual color light emission from the position lamp that complies with the colorimetry standards.

Summary of the Invention
The present disclosure overcomes one or more shortcomings of the prior art and provides additional advantages discussed throughout the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.
In a non-limiting embodiment of the present disclosure, a position lamp of a vehicle is disclosed. The position lamp comprises a first array of light emitting source configured to emit light in a first color and a second array of light emitting source configured to emit light in a second color. The first array and the second array are arranged in such a manner that a light emitted from the position lamp has a dual color and the chromaticity coordinates (x, y) of the dual color light lies within chromaticity area defined for at least one of the first color light and the second color light. The chromaticity coordinate x indicates hue and y indicates saturation of the dual color light. The position lamp further comprises of a lens positioned laterally in front of the first array and the second array for projecting out the dual color light from the position lamp.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
Brief Description of the Drawings
Figure 1 depicts exemplary embodiments 100a and 100b to obtain dual color light from a position lamp 100;
Figure 2(a) and 2(b) depicts the lit appearance of the position lamp 100 corresponding to embodiments 100a and 100b; and
Figure 3 shows the areas defined by the chromaticity coordinates (x, y) for white light and amber light on the Chromaticity Diagram.

The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures illustrated herein may be employed without departing from the principles of the disclosure described herein.
Detailed description
The foregoing has broadly outlined the features and technical advantages of the present disclosure in order that the detailed description of the disclosure that follows may be better understood. It should be appreciated by those skilled in the art that the conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure.
The novel features which are believed to be characteristic of the disclosure, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present disclosure.
Disclosed herein is a position lamp of a vehicle that is designed to emit dual color light. It may be understood to a skilled person that the disclosed position lamp may be implemented as a front position lamp or a rear position lamp or at any other position of the vehicle. The position lamp may be implemented in various types of vehicles including, but not limited to, two-wheelers, three-wheelers, four-wheelers, or in any other type of vehicles. The position lamp generally, comprises of an array Light Emitting Diodes (LEDs) that emit light of a single color. The LEDs can either emit light of white color or amber color.
Although, the single-color lamps fulfil the required purpose, there always exists a scope of improvement that is not only aesthetically appealing but also provides enhanced safety to a vehicle. The present disclosure, therefore, aims to enhance the aesthetic appeal of a front position lamp and provide improved safety to a vehicle by designing a front position lamp that emits a highly expressive dual color light. To achieve the objective, the present disclosure discloses a dual-color position lamp to emit the light in dual color, thereby making it more expressive and appealing, which further enhances the safety.

Figure 1 depicts exemplary embodiments 100a and 100b to obtain dual color light from a position lamp 100. According to an embodiment 100a shown at left-hand side of figure 1, the white color LEDs 102a are arranged in an array. Few of the white LEDs in the array are replaced by amber color LEDs 101a. The replacement of the LEDs in the array depends upon the desired shade length. However, the major challenge in designing a dual color position lamp lies in the fact that the dual color light so obtained must comply with the colorimetry standards as set forth by a homologation authority. This compliance is crucial for the safety of the vehicle. Therefore, the replacement of LEDs of one color with the LEDs of another color to obtain dual color light has to be done in a manner that the colorimetry values of the emitted light lie within an area defined by the chromaticity coordinates (x, y) for white light or for amber light. The chromaticity coordinate x indicates hue and y indicates saturation of the emitted light. According to the embodiment shown in 100a, the chromaticity coordinates (x, y) of the emitted dual color light lie within an area for the white light defined by the intersection points given in Table 1.

x y
W1 0.310 0.348
W2 0.453 0.440
W3 0.500 0.440
W4 0.500 0.382
W5 0.443 0.382
W6 0.310 0.283
Table 1: Chromaticity coordinates (x, y) for white light according to embodiment 100a
Now, 100b shows an alternative embodiment of the position lamp 100 to obtain a dual color light. In this embodiment, the amber color LEDs 102b are arranged in an array. Few of the amber color LEDs in the array are replaced by white color LEDs 101b. Here, the chromaticity coordinates (x, y) of the emitted dual color light lie within an area for amber color light defined by the intersection points given in Table 2.

x y
A1 0.545 0.425

A2 0.560 0.440
A3 0.609 0.390
A4 0.597 0.390
Table 2: Chromaticity coordinates (x, y) for amber light according to embodiment 100b
In both the embodiments 100a and 100b, a LED PCB 103 houses the array of the LEDs. Further, the position lamp 100 may also comprise a reflector improve the efficiency of the position lamp 100. The reflector may be made either of a super white high reflective material or a metalized material.
The front position lamp 100 further comprises of a lens 104 that is positioned laterally in front of the array of LEDs to project out the dual color light from the position lamp. Conventionally, for a single-color position lamp, the material chosen for the lens is transparent in nature that includes materials like polycarbonate, glass etc. However, in the present disclosure a diffused grade material is selected to make the lens 104 as it diffuses both the colors without the formation of any sharp edges or bright spots.
Figures 2(a) and 2(b) depict the lit appearance of the position lamp 100 corresponding to the embodiments 100a and 100b illustrated in figure 1. From the figures 2(a) and 2(b), it can be seen that the dual color light is highly expressive and therefore, can improve the safety of a vehicle. To illustrate the improved safety of the vehicle using dual color front position lamps, consider a situation where the vehicle breaks down on a highway. The driver of the vehicle turns ON the dual color position lamps to alert other speeding drivers of his/her presence on the highway to avoid accidents. The dual color light from the position lamps being highly expressive and distinguishable will make it easier when compared with single color position lamps for other vehicles on the highway to detect the broken down vehicle as it will not be confused with the light emitted from the headlamps of any other vehicle.

In figure 2a, the number of white color LEDs are more than the number of amber color LEDs. However, in figure 2b, the number of amber color LEDs are more than the number of white color LEDs. In both the embodiments shown in figures 2a and 2b, the position lamps will be lit with the dual color giving more appealing look to the position lamps. It can be observed that how the LEDs of the white and amber color lights are placed with each other on the base. Upon the array of the LEDs, reflector and lens are provided which helps in efficiently emitting the light from the position lamp. The actual lit appearance of the dual color light can be seen on outer position of figures 2a and 2b. In figure 2a, it can be observed how the white color is dominating over the amber color. Whereas, in figure 2b, the amber color is dominating over the white color.
Thus, the dual color position lamps of the present disclosure not only aesthetically appealing but also enhances the safety of the vehicles. According to embodiments present disclosure, the dual color position lamps are also complied with chromaticity standards, which is safety and homologation regulations to be met. The detail explanation of the chromaticity coordinates is explained in the subsequent paragraphs of the specification.
Figure 3 shows the areas defined by the chromaticity coordinates (x, y) for white light and amber light on the Chromaticity Diagram on X-Y axis. The region bound by the points W1 – W6 represent the x and y coordinates for white light as shown in the above table 1. This means that, when amber color shade is introduced in the white light as depicted in the embodiment 100a of figure 1, the chromaticity coordinates of the emitted dual color light lies within the area bound by the points W1 – W6.
Similarly, the region bound by the points A1 – A4 represent the x and y coordinates for amber light according to the above table 2. This means that, when white color shade is introduced in amber light as depicted in the embodiment 100b of the figure 1, the chromaticity coordinates of the emitted dual color light lies within the area bound by the points A1 – A4. Thus, figure 3 clearly shows how the chromaticity coordinates (x, y) for white light and amber light are placed in different embodiments of the present disclosure.
The terms "including", "comprising", “having” and variations thereof mean "including but not limited to", unless expressly specified otherwise.

The enumerated listing of items does not imply that any or all of the items are mutually exclusive, unless expressly specified otherwise.
The terms "a", "an" and "the" mean "one or more", unless expressly specified otherwise.
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.
When a single device or article is described herein, it will be readily apparent that more than one device/article (whether or not they cooperate) may be used in place of a single device/article. Similarly, where more than one device or article is described herein (whether or not they cooperate), it will be readily apparent that a single device/article may be used in place of the more than one device or article or a different number of devices/articles may be used instead of the shown number of devices or programs. The functionality and/or the features of a device may be alternatively embodied by one or more other devices which are not explicitly described as having such functionality/features. Thus, other embodiments of the invention need not include the device itself.
Finally, the language used in the specification has been principally selected for readability and instructional purposes, and it may not have been selected to delineate or circumscribe the inventive subject matter. It is therefore intended that the scope of the invention be limited not by this detailed description, but rather by any claims that issue on an application based here on. Accordingly, the embodiments of the present invention are intended to be illustrative, but not limiting, of the scope of the invention, which is set forth in the following claims.
While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

We Claim:
1. A position lamp (100) of a vehicle comprises:
a first array (102a, 101b) of light emitting source configured to emit light in a first color; a second array (101a, 102b) of light emitting source configured to emit light in a second
color;
wherein the first array (102a, 101b) and the second array (101a, 102b) are arranged in such
a manner that:
a light emitted from the position lamp (100) has a dual color light, and chromaticity coordinates (x, y) of the dual color light lies within chromaticity area defined for at least one of the first color light and the second color light, wherein the x indicates hue and y indicates saturation of the dual color light; and a lens (104) positioned laterally in front of the first array (102a, 101b) and the second array
(101a, 102b) for projecting out the dual color light from the position lamp (100).
2. The position lamp (100) as claimed in claim 1, wherein the first (102a, 101b) and the second array (101a, 102b) of light emitting source comprises at least one of a plurality of light emitting diodes (LEDs) and a plurality of bulbs.
3. The position lamp (100) as claimed in claim 1, wherein the light emitted in the first color is a white color and the light emitted in the second color is an amber color.
4. The position lamp (100) as claimed in claim 1, wherein the first array (102a, 101b) of the light emitting source and the second array (101a, 102b) of the light emitting source are arranged in different proportions.
5. The position lamp (100) as claimed in claim 1, wherein the chromaticity coordinates of the dual color light lies in chromaticity area defined for a white light when number of the first array of the light emitting source illuminating the white light is greater than number of the second array of the light emitting source illuminating the amber light.

6. The position lamp (100) as claimed in claim 1, wherein the chromaticity coordinates of the dual color light lies in chromaticity area defined for an amber light when the number of the second array of light emitting source illuminating the amber light is greater than the number of the first array of the light emitting source illuminating the white light.
7. The position lamp (100) as claimed in claim 1, wherein the lens (104) is made of a diffused grade material to allow diffusion of the light of the first color with the light of the second color without any formation of sharp edge or bright spots.
8. The position lamp (100) as claimed in claim 1, further comprises a LED PCB (103) for housing the first array (102a, 101b) of light emitting source and the second array (101a, 102b) of light emitting source.
9. The position lamp (100) as claimed in claim 8, further comprises a reflector made of at least one of a reflective material or a metalized material.