TECHNICAL FIELD
[0001] The present invention relates to a display device to be installed on the backside of vehicles (hereinafter interchangeably referred as “automobile,” “car”, “dumper” or “vehicle”) and more particularly a device displaying running speed of vehicles and more particularly a display device to be useful for the following vehicles.

BACKGROUND
[0002] The background description includes information that may be useful in understanding the present disclosure. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed disclosure, or that any publication specifically or implicitly referenced is prior art.
[0003] Automobile is a wheeled passenger vehicle that carries its own motor. Most definitions of the term specify that automobiles are designed to run primarily on roads, to have seating for one to six people, typically have four wheels and be constructed principally for transportation of people.
[0004] Lots of road accidents take place due to the usage of sudden brakes by preceding vehicles as the vehicles running behind that vehicle do not have exact idea of speeds at which the preceding vehicle is running and collides once the preceding vehicle uses sudden brake.
[0005] Patent US20060227212A1 has disclosed a video display system for a vehicle wherein a first video display is used for providing an image projection to a rear view mirror of the vehicle, and a second video display mounted behind the first video display.
[0006] Patent US20140111323A1 has disclosed an arrangement or adaptation of optical signaling or lighting devices, the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic mounted on parts having other functions on windscreens or windows
[0007] Patent US7221363B2 has disclosed a vehicle information display system where various information’s regarding the vehicle are displayed and also covert displays using the same.
[0008] These and similar devices have been very useful for the vehicles. However, there are lacks of devices which can be useful for the following vehicles to know the exact speed of the preceding vehicles at which it is running.
[0009] The present invention relates generally to improved instrumentation for vehicles. In particular, the invention provides an apparatus and method for an improved display for speed that acts as a speedometer for an automobile. More particularly, the invention provides a device and method for an improved display for reading velocity that acts as a speedometer in one or more measurement conventions, which are coupled to each other. Merely by way of example, the invention is applied to an exterior of an automobile, but it would be recognized that the invention has a much broader range of applicability.
[00010] There is hence, an unmet need of developing a display device showing speed of vehicles to be installed on the backside of which would be useful for the following vehicles to know the speed of the preceding vehicles at which it is running.

OBJECTS OF THE INVENTION
[00011] Therefore, one object of the present invention is to develop a mechanism to show speed of vehicle on its backside.
[00012] Another object of the present invention is to develop a bigger display device showing speed of vehicle, viewable from distance.
[00013] Another object of the present invention is to develop a display device to be useful for following vehicles to know the speed of preceding vehicles.
[00014] Yet another object of the present invention is to minimise road accidents caused due to sudden usage of brakes.

SUMMARY
[00015] The present disclosure generally relates to a speed indicators device at the rear windscreen of the vehicle. Specifically the speed indicator device of the present invention includes components such as an Inductive proximity sensor, Arduino Uno, Servo motor, Battery, LED strip and connecting wires.
[00016] In one aspect. the present invention relates to a display device at backside of a vehicle for determining speed of the vehicle, comprising of: an inductive proximity sensor (102) to calculate the rotation of the wheel; battery (104) to charge microcontroller; a microcontroller (106) is connected to the battery (104) and the inductive proximity sensor (102) to receive signal; a servo motor (108) is connected with the microcontroller (106); and a speedometer (110) is connected with the servomotor (108) to display the speed of a vehicle.
[00017] In another aspect, the display device of the present invention at backside of a vehicle for determining speed of the vehicle further comprises connecting wires to connect the different components of display device.
[00018] In another aspect, the inductive proximity sensor (102) of the present invention comprising of positive pin, negative pin and signal pin.
[00019] In yet another aspect, the present invention relates to a display device at backside of a vehicle for determining speed of the vehicle, wherein the inductive proximity sensor (102) is magnetic type inductive sensor to calculate the rotations of wheels and indicate it on signal pin.
[00020] In yet another aspect, the present invention relates to a display device at backside of a vehicle for determining speed of the vehicle, wherein the microcontroller (106) is Arduino UNO board.
[00021] In yet another aspect, the Arduino board of the microcontroller of the present invention receives information from signal pin of the inductive proximity sensor and sends signal to the servo motor.
[00022] In yet another aspect, the Arduino board of the microcontroller of the present invention sends signal to the servo motor on pulse width modulation (PWM) pin.
[00023] In yet another aspect, the present invention relates to a display device at backside of a vehicle for determining speed of the vehicle, wherein the battery is rechargeable or non-rechargeable.
[00024] In yet another aspect, the present invention relates to a display device at backside of a vehicle for determining speed of the vehicle, wherein the display of speed in the backside can be in both analog or digital or any of this way.
[00025] In yet another aspect, the speedometer of a display device of the present invention at backside of a vehicle for determining speed of the vehicle comprises LED needle, wherein the needle in speedometer is at 0 at initial stage, moves upward when speed increases, and moves downwards when speed decreases.
[00026] In another aspect, the present invention relates to a display device at backside of a vehicle for determining speed of the vehicle, wherein the speed indicator device will help the driver of the following vehicles to have an idea about the speed, acceleration and deceleration of the leading car so as to take appropriate decision and to avoid accidents.
[00027] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF DRAWINGS
[00028] The accompanying drawing is included to provide a further understanding of the present disclosure, and is incorporated in and constitutes a part of this specification. The drawing illustrates exemplary embodiments of the present disclosure and together with the description, serves to explain the principles of the present disclosure.
[00029] In the figure, similar components and/or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label with a second label that distinguishes among the similar components. If only the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label.
[00030] Figure 1 depicts a block diagram of a display device of the present invention at backside of a vehicle for determining speed of the vehicle.

DETAILED DESCRIPTION OF INVENTION
[00031] The following is a detailed description of embodiments of the disclosure. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[00032] Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. This disclosure may however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those of ordinary skill in the art. Moreover, all statements herein reciting embodiments of the disclosure, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure).
[00033] The headings and abstract of the invention provided herein are for convenience only and do not interpret the scope or meaning of the embodiments.
[00034] The following discussion provides many example embodiments of the inventive subject matter. Although each embodiment represents a single combination of inventive elements, the inventive subject matter is considered to include all possible combinations of the disclosed elements. Thus if one embodiment comprises elements A, B, and C, and a second embodiment comprises elements B and D, then the inventive subject matter is also considered to include other remaining combinations of A, B, C, or D, even if not explicitly disclosed.
[00035] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply.
[00036] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description that follows, and the embodiments described herein, is provided by way of illustration of an example, or examples, of particular embodiments of the principles and aspects of the present disclosure. These examples are provided for the purposes of explanation, and not of limitation, of those principles and of the disclosure.
[00037] It should also be appreciated that the present invention can be implemented in numerous ways, including as a system, a method or a device. In this specification, these implementations, or any other form that the invention may take, may be referred to as processes. In general, the order of the steps of the disclosed processes may be altered within the scope of the invention.
[00038] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[00039] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[00040] The present invention generally relates to speed indicators device at the rear windscreen of the vehicle. The display device comprises of one display, clamps, circuit board and cable etc. The display is fitted with the help of clamps on the backside of vehicles without creating hindrance in view of driver in the back side. The mechanism can take input either from the main speedometer using one auxiliary circuit board or from the wheels of vehicle using non-contact tachometer and electronic circuit to convert the signals into usable form. The display of speed can be in both analog and digital or any of this way. Now, the following vehicles can see the speed of the preceding vehicle. The following vehicles can adjust their speeds and maintain adequate distance between the vehicles. This helps in avoiding collision if the preceding one uses sudden brakes if necessary.
[00041] FIG. 1 illustrates block diagram of a display device at backside of a vehicle for determining speed of the vehicle, in accordance with an embodiment of the present invention. In an aspect, a display device can include an inductive proximity sensor (102) comprising three pins, positive pin, negative pin and signal pin. Battery (104) having positive and negative electrodes, is connected with microcontroller (106) using it’s positive and negative pins. The positive pin of the inductive proximity sensor (102) is connected with Arduino positive 5V pin and the negative pin of the inductive proximity sensor (102) is connected with Arduino ground pin. The signal pin of the inductive proximity sensor (102) is connected with Arduino pin no 7 and provides data of sensor to the Arduino. The servomotor (108) is connected with Arduino pin no. 9 and the speedometer (110) is connected with the servomotor (108) to display the speed of the vehicle.
[00042] In an embodiment, the signal pin of the inductive proximity sensor (102) is mounted on one wheel of the vehicle.
[00043] In another embodiment of the present invention, the inductive proximity sensor of a display device of the present invention is magnetic type inductive sensor used to calculate the speed of the vehicle. The inductive proximity sensor of the present invention detects the metal targets without physical contact with target.
[00044] In another embodiment of the present invention, the magnetic type of proximity sensor is used to calculate the speed of the vehicle. The magnetic type proximity sensor calculates the rotations of the wheels and indicates it on signal pin.
[00045] In another embodiment of the present invention, Arduino board is loaded with programs and will work according to the programs loaded into it. The arduino board counts the rotation of wheels and gives output to servo motor on pin PWM.
[00046] In an embodiment of the present invention, the speedometer of the device of the present invention comprises a needle. Needle in the speedometer is at zero on initial stage. When speed increases, needle moves upward. On other hand, when speed decreases, needle moves downwards.
[00047] In another embodiment of the present invention, mechanism can take input either from the main speedometer using one auxiliary circuit board or from the wheels of vehicle using non-contact tachometer and electronic circuit to convert the signals into usable form.
[00048] In an embodiment of the present invention, display of speed can be in both analog speedometer and digital speedometer or any of this way. Now, the following vehicles can see the speed of the preceding vehicle. The following vehicles can adjust their speeds and maintain adequate distance between the vehicles. This helps in avoiding collision if the preceding one uses sudden brakes if necessary.
[00049] In an aspect, the vehicle can be a mobile machine that transports people or cargo. Typical vehicles include wagons, bicycles, motor vehicles (motorcycles, trucks, and buses), railed vehicles (trains, trams), watercraft (ships, boats), aircraft and spacecraft. It may be appreciated that autonomous as well as semi-autonomous vehicles falls within the scope of the vehicle according to the present disclosure.
[00050] In an aspect, the one or more sensors and the one or more controllers can be integrated/configured during implementation of the proposed device. In an aspect one or more type of proximity sensor can be used. In yet another aspect, the one or more sensors and the one or more controllers can be integrated/configured into a single device and such a device can be integrated/configured outside the vehicle.
[00051] Exemplary embodiments are provided only for illustrative purposes and so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those of ordinary skill in the art. The disclosure disclosed may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Various modifications will be readily apparent to persons skilled in the art. The general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the disclosure. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure). Also, the terminology and phraseology used is for the purpose of describing exemplary embodiments and should not be considered limiting.
[00052] Thus, the present disclosure is to be accorded the widest scope encompassing numerous alternatives, modifications and equivalents consistent with the principles and features disclosed. For purpose of clarity, details relating to technical material that is known in the technical fields related to the disclosure have not been described in detail so as not to unnecessarily obscure the present disclosure.

CLAIMS:
1. A display device at the backside of the vehicle for determining the speed of vehicle, comprising of: an inductive proximity sensor (102) to calculate the rotation of the wheel; battery (104) to charge microcontroller; a microcontroller (106) is connected to the battery (104) and the inductive proximity sensor (102) to receive signal; a servo motor (108) is connected with the microcontroller (106); and a speedometer (110) is connected with the servomotor (108) to display the speed of a vehicle.

2. The display device at the backside of the vehicle for determining the speed of vehicle as claimed in claim 1, wherein the device further comprises connecting wires.

3. The display device at the backside of the vehicle for determining the speed of vehicle as claimed in claim 1, wherein said inductive proximity sensor (102) is magnetic type inductive sensor.

4. The display device at the backside of the vehicle for determining the speed of vehicle as claimed in claim 1, wherein said inductive proximity sensor (102) consists of positive pin, negative pin and signal pin.

5. The display device at the backside of the vehicle for determining the speed of vehicle as claimed in claim 1, wherein said inductive proximity sensor (102) calculate the rotation of wheel and indicate it on signal pin.

6. The display device at the backside of the vehicle for determining the speed of vehicle as claimed in claim 1, wherein said microcontroller (106) is Arduino Uno.

7. The display device at the backside of the vehicle for determining the speed of vehicle as claimed in claim 1, wherein said battery (104) is rechargeable or non-rechargeable.

8. The display device at the backside of the vehicle for determining the speed of vehicle as claimed in claim 1, wherein said speedometer (110) is analog speedometer or digital speedometer.

9. The display device at the backside of the vehicle for determining the speed of vehicle as claimed in claim 1, wherein the device can be fixed at back side of vehicles selected from car, bus and motorcycles.