FORM 2
THE PATENTS ACT, 1970
(39 OF 1970)
AND
THE PATENT RULES, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)
“EMERGENCY LUMINAIRE SYSTEM”
I/We, Bajaj Electricals Limited, an Indian National, of 45/47, Veer Nariman Road, Fort Mumbai- 400001, India.
The following specification particularly describes the invention and the manner in which it is to be performed.

FIELD OF INVENTION
The present invention generally relates to the field of emergency lighting devices. In particular, the present invention relates to a system for charging an emergency luminaire device.
BACKGROUND OF THE INVENTION
This section is intended to provide information relating to the field of disclosure and thus, any approach or functionality described herein should not be assumed to qualify as prior art merely by its inclusion in this section.
Emergency luminaires are being more widely used as they provide emergency illumination capabilities along with being aesthetically presented. Emergency luminaires are provided control modules that are adapted to receive electric power from an external source, and at least a portion of the received electric power is used to charge a battery of the luminaire. During events when there is an interruption in electric power from the external source, the battery may supply electric power to operate the luminaire.
A remaining portion of the received electric power is used to operate the luminaire. However, conventional luminaires are operated such that they are illuminated even during charging process of the battery even when a requirement for illumination is not present. As a result, there is an inefficiency in charging of the battery, and a reduction in operating lifetime of the luminaire due to unwanted illumination.
There is therefore a requirement in the art for a means to regulate illumination output from an emergency luminaire during charging operation of the luminaire.
SUMMARY OF THE INVENTION
This section is intended to introduce one or more aspects and/or embodiments of the present disclosure in a simplified form and is not intended to identify any key advantages or features of the present disclosure.
In an aspect of the present invention, there is provided an emergency luminaire system comprising: a switching module; a current control module; a battery for storing electrical energy; and at least a luminaire.

In an aspect of the present invention, the emergency luminaire system comprises a first charging mode and a second charging mode, wherein the switching module toggles between the first charging mode and the second charging mode.
In an aspect of the present invention, in the first charging mode, the lumen output of the at least a luminaire is less than or equal to 10% of the rated lumen output of the luminaire; and in the second charging mode, the lumen output of the at least a luminaire is equal to or greater than 90% of the rated lumen output.
In another aspect of the present invention, in the first charging mode, the lumen output of the at least a luminaire is 0% of the rated lumen output of the luminaire; and in the second charging mode, the lumen output of the at least a luminaire is 100% of the rated lumen output.
In yet another aspect of the present invention, the current control module is configured to supply a first current from an electrical power supply to the battery of the emergency luminaire system in the first charging mode; or a second current from the electrical power supply to the battery of the emergency luminaire system in the second charging mode.
In an aspect of the present invention, the second current is not more than 20% of the first current.
In still another aspect of the present invention, the emergency luminaire system comprises a rectifier module configured to convert the electrical power supply from AC to DC.
In an aspect of the present invention, the emergency luminaire system comprises a battery management system (BMS).
In an aspect, in the absence of electrical power from an electrical power supply to the battery of the emergency luminaire system, the BMS is configured to supply a third current to the at least a luminaire, from the battery.
In an aspect, the lumen output of the at least a luminaire is in the range of 25% to 100% of the rated lumen output when the third current is supplied to the at least a luminaire.
In another aspect, the lumen output from the at least a luminaire is 30% of the rated lumen output when the third current is supplied to the at least a luminaire.

In an aspect of the present invention, the switching module comprises a memory module configured to store first charging mode state or second charging mode state.
In an aspect of the present invention, the memory module comprises a non-volatile memory and is configured to store last charging mode state for up to 25 years.
In an aspect of the present invention, emergency luminaire system comprises an indicator configured to indicate the state of charging of the battery.
In another aspect of the present invention, the indicator comprises at least a LED indicator.
In yet another aspect of the present invention, the indicator is off when the battery is at least 95% charged; the indicator flashes intermittently when the battery charge is less than 95%; and the indicator is continuously on when the battery charge is less than 80%.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The present disclosure, both as to its organization and manner of operation, together with further objects and advantages, may best be understood by reference to the description, taken in connection with the accompanying drawings. These and other details of the present invention will be described in connection with the accompanying drawings, which are furnished only by way of illustration and not in limitation of the scope of the present disclosure.
FIG. 1 illustrates a schematic block diagram of an emergency luminaire system, according to an embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
In the following description, for the purposes of explanation, various specific details are set forth in order to provide a thorough understanding of one or more embodiments of the present disclosure. It will be apparent, however, that embodiments of the present disclosure may be practiced without these specific details. Several features described hereafter may each be used independently of one another or in any combination with other features. An individual feature may not address any of the problems discussed above or may address only some of the problems discussed above. Some of the problems discussed above may not be fully addressed by any of the features described herein.

Example embodiments of the present disclosure are described below, as illustrated in various drawings, in which same reference numerals refer to the same parts throughout the different drawings.
The present invention provides an emergency luminaire system comprising: a switching module; a current control module; a battery for storing electrical energy; and at least a luminaire. Some examples of luminaires include, without any limitation, lamps, torches, etc. In an embodiment, the luminaire is a fixed luminaire. In another embodiment, the luminaire is a portable luminaire. The fixed luminaire may be coupled with a suitable fitting or attachment that is fixedly coupled at a location. In an embodiment, the luminaire is selected from at least one of an incandescent source, a gas-based source, a light emitting diode (LED)-based source, and combinations thereof. In a preferred embodiment, the luminaire is a LED-based light source. In an embodiment, the at least a luminaire comprises a plurality of luminaires fitted within a suitable fitting to provide illumination of a desired intensity. In another embodiment, the at least a luminaire comprises a plurality of luminaires fitted in a corresponding plurality of fitting, and disposed in a region, such as a room, a building, etc.
In an embodiment, the system comprises a first charging mode and a second charging mode. The switching module toggles between the first charging mode and the second charging mode. In an embodiment, the emergency luminaire system comprises a battery management system (BMS). In an embodiment, the toggling operation by the switching module is controlled by any one or a combination of the BMS, and a manual input provided by a user. In a preferred embodiment, the toggling operation by the switching module is controlled by the BMS.
In an embodiment, the toggling operation by the switching module occurs based at least on the availability of electrical power from an electrical power supply that the system is electrically coupled to, and a required state of operation of the luminaire. In an embodiment, the toggling operation by the switching module occurs based on a required state of operation of the luminaire. In a preferred embodiment, the toggling operation by the switching module occurs based on the required state of operation of the luminaire, when electrical power from the electrical power supply is positively available.
In an embodiment, the switching module is configured to toggle a mode of operation of the system to the first charging mode when electrical power is available from

the electrical power supply, and the luminaire is required to operate to generate a light output. In an embodiment, the switching module is configured to toggle a mode of operation of the system to the second charging mode when electrical power is available from the electrical power supply, and the luminaire is not required to operate.
In an embodiment, in the first charging mode, the lumen output of the at least a luminaire is less than or equal to 10% of a rated lumen output of the luminaire. In a preferred embodiment, in the first charging mode, the output from the luminaire is zero. In an embodiment, in the second charging mode, the lumen output of the at least a luminaire is equal to or greater than 90% of the rated lumen output. In a preferred embodiment, in the second charging mode, the output from the luminaire is 100% of the rated lumen output.
In an embodiment, the current control module is configured to supply a first current from the electrical power supply to the battery of the emergency luminaire system in the first charging mode. The current control module is alternately configured to supply a second current from the electrical power supply to the battery of the emergency luminaire system in the second charging mode.
In an embodiment, the second current is not more that 20% of the first current. In an embodiment, the first current and the second current are supplied to the battery to charge the battery. In a preferred embodiment, the first current is a maximum permissible value that can be provided to charge the battery.
In an embodiment, the emergency luminaire system comprises a rectifier module configured to convert the electrical power supply from AC to DC.
In an embodiment, in the absence of electrical power from the electrical power supply, and where the luminaire is required to operate, the BMS is configured to supply a third current to the luminaire from the battery. In an embodiment, while operating on the third current, the lumen output from the luminaire is greater than at least 25% of the rated lumen output. In an embodiment, while operating on the third current, the lumen output from the luminaire is less than 100% of the rated lumen output. In an embodiment, while operating on the third current, the lumen output from the luminaire is in the range of 25% to 100% of the rated lumen output. In a preferred embodiment, while operating on the third current, the lumen output from the luminaire is about 30% of the rated lumen

output. As a result, the state of charge of the battery lasts longer while providing electrical power to operate the luminaire.
In an embodiment, the switching module comprises a memory module configured to store first charging mode state or second charging mode state.
In an embodiment, the emergency luminaire system comprises an indicator configured to indicate the state of charging of the battery. In an embodiment, the indicator is selected from at least an audio indicator, a visual indicator, and a haptic indicator. In a preferred embodiment, the indicator is a visual indicator. In an embodiment, the indicator comprises at least an LED indicator. In an embodiment, the indicator comprises a plurality of LED indicators. In an alternate embodiment, the indicator comprises LED indicators that are adapted to emit light having different optical properties. The optical properties are selected from at least one of colour, intensity, and flash rate.
In an embodiment, the indicator is off when the battery is at least 95% charged. In an embodiment, the indicator flashes intermittently when the battery charge is less than 95%. In a preferred embodiment, the indicator flashes intermittently when the battery charge is in a range of 80% to 95%. In an embodiment, the indicator is continuously on when the battery charge is less than 80%. In an alternate embodiment, the indicator emits a light having a first colour when the battery is at least 95% charged; the indicator emits a light having a second colour when the battery charge is less than 95%; and the indicator emits a light having a third colour when the battery charge is less than 80%.
FIG. 1 illustrates a schematic block diagram of an emergency luminaire system 100 (“system 100”), according to an embodiment of the present invention. The system 100 includes a switching module 102, a current module 104, a battery 106 for storing electrical energy, and luminaire 108. The system 100 further includes an electrical power supply 110, a rectifier module 112, a battery management system (BMS) 114, and an indicator 116.
The system 100 includes first and second charging modes. The switching module 102 is configured to toggle the system 100 between the first and second charging modes. During both first and second charging modes, the battery 106 of the system 100 is being charged by electrical power being supplied to it. In the first charging mode, the lumen output of the luminaire 108 is zero. In other words, in the first charging mode, the luminaire 108 is switched off. In the second charging mode, the lumen output of the

luminaire is 100%. In other words, in the second charging mode, the luminaire is fully illuminated. The current control module 104 is configured to supply current from the electrical power supply 110 to the battery 106 of the system 100. In the first charging mode, the current control module 104 is configured to supply a first current from the to the battery 106. In the second charging mode, the current control module 104 is configured to supply a second current from the to the battery 106. The second current is about 20% of the first current.
In other words, when the luminaire 108 is off, the battery 106 is charged with a higher current thereby minimising a time required to charge the battery. When the luminaire 108 is illuminated, a portion of the received second current is supplied to the luminaire 108 to illuminate it, and a remaining portion of the second current is supplied to the battery 106 to charge it. As a result, the battery 106 may not experience charging-discharge cycles simultaneously by supplying electrical energy from the battery 106 while also being charged. Such an arrangement may improve an operating lifetime of the battery 106. Further, such an arrangement may reduce a heating that may occur during charging of the battery 106, further improving operating lifetime of other components disposed proximal to the battery 106.
The current supplied from the electrical power supply 110 may be an alternating current (AC). The rectifier module 112 is configured to convert the received AC current to direct current (DC) to be supplied to the battery 106.
In the absence of electrical power from the electrical power supply 110, and where the luminaire 108 is required to be illuminated, the BMS 114 is configured to supply a third current to the luminaire 108 from the battery 106. While the luminaire 108 is operating on the third current, the lumen output of the luminaire 108 is about 30% of the rated lumen output.
The switching module 102 includes a memory module (not shown in figure) configured to store first charging mode state or second charging mode state. The memory module includes an inbuilt non-volatile memory to store the last charging mode during failure of the electrical power supply 110. The memory module is capable of storing the last charging mode for up to 25 years. The system 100 includes an indicator 116 configured to visually indicate a current state of charging of the battery 106. In an example, the indicator 116 is off when the battery 106 is at least 95% charged, the

indicator 116 flashes intermittently when the battery 106 charge is less than 95%, and the indicator 116 is continuously on when the battery 106 charge is less than 80%.
While the preferred embodiments of the present disclosure have been described hereinabove, it may be appreciated that various changes, adaptations, and modifications may be made therein without departing from the spirit of the disclosure and the scope of the appended claims. It will be obvious to a person skilled in the art that the present disclosure may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments may to be considered in all respects only as illustrative and not restrictive.
LIST OF REFERENCE NUMERALS
100 Emergency Luminaire System
102 Switching Module
104 Current Control Module
106 Battery
108 Luminaire
110 Electrical Power Supply
112 Rectifier Module
114 Battery Management System (BMS)
116 Indicator
End of Page

I/We Claim:
1. An emergency luminaire system (100) comprising:
- a switching module (102);
- a current control module (104);
- a battery (106) for storing electrical energy; and
- at least a luminaire (108).

2. The emergency luminaire system (100) as claimed in claim 1, comprising a first charging mode and a second charging mode, wherein the switching module (102) toggles between said first charging mode and the second charging mode.
3. The emergency luminaire system (100) as claimed in claim 2, wherein, in the first charging mode, the lumen output from the at least a luminaire (108) is less than or equal to 10% of the rated lumen output of the luminaire; and in the second charging mode, the lumen output from the at least a luminaire (108) is equal to or greater than 90% of the rated lumen output.
4. The emergency luminaire system (100) as claimed in claim 3, wherein, in the first charging mode, the lumen output from the at least a luminaire (108) is 0% of the rated lumen output of the luminaire; and in the second charging mode, the lumen output from the at least a luminaire (108) is 100% of the rated lumen output.
5. The emergency luminaire system (100) as claimed in claim 1, wherein the current control module (104) is configured to supply a first current from an electrical power supply (110) to the battery (106) of the emergency luminaire system (100) in the first charging mode; or a second current from the electrical power supply (110) to the battery (106) of the emergency luminaire system (100) in the second charging mode.
6. The emergency luminaire (100) as claimed in claim 5, wherein the second current is not more than 20% of the first current.

7. The emergency luminaire system (100) as claimed in claim 1, comprising a rectifier module (112) configured to convert the electrical power supply from AC to DC.
8. The emergency luminaire system (100) as claimed in claim 1, comprising a battery management system (BMS) (114).
9. The emergency luminaire system (100) as claimed in claim 8, wherein in an absence of electrical power from an electrical power supply (110) to the battery (106) of the emergency luminaire system (100), the BMS (114) is configured to supply a third current to the at least a luminaire (108) from the battery (106).

10. The emergency luminaire system (100) as claimed in claim 9, wherein the lumen output of the at least a luminaire (108) is in the range of 25% to 100% of the rated lumen output, when the third current is supplied to the at least a luminaire (108).
11. The emergency luminaire system (100) as claimed in claim 10, wherein, the lumen output of the at least a luminaire (108) is 30% of the rated lumen output, when the third current is supplied to the at least a luminaire (108).
12. The emergency luminaire system (100) as claimed in claim 1, wherein the switching module (102) comprises a memory module configured to store first charging mode state or second charging mode state.
13. The emergency luminaire system (100) as claimed in claim 12, wherein the memory module comprises a non-volatile memory, and is configured to store last charging mode state for up to 25 years.
14. The emergency luminaire system (100) as claimed in claim 1, comprising an indicator (116) configured to indicate a current state of charging of the battery (106).

15. The emergency luminaire system (100) as claimed in claim 14, wherein the indicator (116) comprises at least a LED indicator.
16. The emergency luminaire system (100) as claimed in claim 15, wherein the indicator (116) is off when the battery (106) is at least 95% charged; the indicator (116) flashes intermittently when the battery (106) charge is less than 95%; and the indicator (116) is continuously on when the battery (106) charge is less than 80%.