Title of Invention

ADAPTER FOR LAPTOP AND OTHER ELECTRONIC DEVICES

Abstract

The present invention relates to an adapter for laptop and other electronic devices comprising a means for generating the D.C. voltage from the solar rays, a voltage regulator circuit connected to the said means to regulate the voltage produced to the required voltage, a voltage divider connected to the said voltage regulator circuit to obtain the different required voltage, amplifying means for amplifying the selected voltage signal from voltage divider, a driver stage connected to the said voltage divider for positive feed back, means for supplying the required supply to the device protecting the load from phase reversal.

Full Text

Field of the invention The present invention relates to a solar energy powered adapter for charging battery of a laptop and other electronic devices. Background of the invention There is no doubt that electricity is one of the important indicator for economic development of a nation, therefore, in the last century world wide efforts have been made to generate maximum electricity for upliftment of all types of different industrial, commercial and public uses. The share of production of electricity by using fossil fuel is quite high due to low efficiency of thermal power stations. The use of fossil fuel is increasing day by day at such a high rate, it is expected that by another four to five decades, fossil fuel reserved on earth will get completely exhausted. Therefore, it is very much essential to take initiative without further loss of time to tap another resource for power generation. If the pace of economic development is to be maintained without any hindrance then the increasing demand of energy must be met. In one of the estimate, it is revealed that the Quantum of solar energy that is available on the earth, say on Sahara Desert, which lias about 805 SQ. KM area is enough to generate electricity by the presently available technology for conversion of solar energy into electricity, is higher than the total electricity that the world is using today. Therefore, instead of developing the deserts for another economic purpose, it appears wiser to use it for power generation. Now this discussion amply proves the importance of solar energy for production of electricity. In the era of Mobile Technology and Blue Tooth Technology, the constraint for use of these gadgets is continuous availability of power source. Power source is normally the charge stored in the battery, which in turn is being charged with electricity. In case one moves on weekend for camping, trekking or in warfare the person is away from the electricity supply source for more than four hours and after four hours use, the gadgets become inoperative particularly in remote areas, villages where electricity is not available. This leads a need of solar power source, which will then become compatible with the mobile gadgets. The solar panels can be easily added in a series or parallel to get standard voltage and power level suitable for further modulation. Solar drive interface will be used for modulation of power compatible for laptop battery, camera or mobile battery charging. The flexibility of a multi point adaptor with modulated voltage will increase the functionality and uses. The problem with many battery-operated devices is that the cost of replacement batteries is high and often the battery life is extremely short. This problem can be reduced by mating use of rechargeable cells but this usually involves connecting a charging device to a mains supply. It has previously been proposed in U.S. Pat. No. 4,686,441 to provide a photoelectric charger including a solar electric panel for generating a charging current for a battery, however, the arrangement is cumbersome and does not provide a practical solution to the problem. In this work, it has been observed that solar panels are easily available at the market of standard specifications and simultaneously Laptops are available having various specifications. All type of the Laptops today available are used by using AC adapters and with AC supply lines. In case Solar Panels which produces electricity using solar energy is to be used for the operation of the Lap-Tops, there is mismatch of specifications in the two sides i.e. Solar panel side and Lap-Top side. To overcome this difficulty in interface component in the form of solar drive adaptor has been designed and developed by the inventors. If the people throughout the world use this solar drive the pressure on the normal electricity generation system will ease to a great extent. More than millions of Laptops are in use for various purposes and hundreds of Mega Watts of electricity sharing the world; once this solar drive adaptor is patented, the Laptop maker can take its production and may make available in the market to the common user. Summary of the invention The present invention relates to a solar energy powered adapter for charging battery of a laptop and other electronic devices. More particularly, the present invention relates to an Adapter for laptop and other electronic devices comprising a means for generating the D.C. voltage from the solar rays, a voltage regulator circuit connected to the said means to regulate the voltage produced to the required voltage, a voltage divider connected to the said voltage regulator circuit to obtain the different required voltage, amplifying means for amplifying the selected voltage signal from voltage divider, a driver stage connected to the said voltage divider for positive feed back, means for supplying the required supply to the device protecting the load from phase reversal The object of the present invention is to provide an adapter for charging the battery of a laptop and other electronic devices. Statement of the Invention A solar energy powered adaptor for laptop comprises at least a pair of solar plates connected in series for generating the D.C. voltage from the solar rays, a voltage regulator circuit connected to the said pair of solar plates to regulate the voltage produced to the required voltage, a voltage divider connected to the said voltage regulator circuit to obtain the required voltage, amplifying circuit for amplifying the selected voltage signal from voltage divider characterized by a driver stage connected to the said voltage divider for positive feed back and a pair of powered transistor connected in parallel through a wire bond resistor to increase current carrying capacity for supplying the amplified signal. In an embodiment of the present invention, means are provided for generating the DC voltage which is a solar panel made up of at least a pair of solar plates connected in series In another embodiment of the present invention a voltage regulator circuit is connected to the said solar panel for regulating the voltage produced up to a minimum fixed required level, comprising an Integrated circuit controlled by a power transistor and rectifier connected at the input Integrated circuit to avoid phase reversal . In yet another embodiment of the present invention, a voltage divider circuit is connected to the voltage regulator for obtaining required voltage range comprising a pair of fixed resistor an one variable resistor shunted by a capacitor. In still another embodiment of the present invention, amplifying means is a driver circuit connected to the voltage divider to amplify the selected voltage signal from the voltage divider for positive feedback to make the circuit latch, In yet another embodiment of the present invention, a divider circuit comprising a pair of transistors, a pair of capacitors & resistance network is connected to zener diode to give the selected voltage . In still another embodiment of the present invention, means of supplying the amplified signal comprises at least a pair of power transistors connected in parallel through a wire wound resistance to increase current carrying capacity . The adapter is useful for charging the batteries of laptops and other electronic devices having rechargeable battery. A more complete appreciation of the invention and the attendant advantages thereof will be more clearly understood by reference to the following accompanying drawings which are for illustrative purposes, hence the same should not be construed to restrict the scope of the invention. Fig. 1 illustrates a block diagram of the system Fig. 2 illustrates the circuit diagram of the panel connecting the solar panels to the main charging system of the device. Fig. 3 illustrates the solar panels that are incorporated in the device which are to be used for generating the DC volt from the sunrays. Two solar plates have been used which are combined to each other and are capable to deliver up to 36 volts during bright sunlight. Fig. 4 illustrates the circuit diagram of the voltage regulator, which regulates the output voltage from the solar panels, as the output voltage from the solar panels is much higher than the required voltage. Fig. 5 illustrates the circuit diagram of the voltage divider, which comprises of R5, R6 and VR1, which is used for getting required voltage range. C4 is the filter capacitor. Fig. 6 illustrates the circuit diagram of the driver. Transistors T1 and T4 are used for amplifying the selected voltage signal from voltage divider Stage. R4 is used for positive feedback to make the circuit latch. ZS1 is voltage limiter diode applied to emitter of T4. T3 and T4 are given positive supply line Via R1, C2 and R3. Fig 7 illustrates the circuit diagram of the output section. There are two power transistors used in the circuit in parallel connection to improve the current carrying capacity. R2 is current limiting resistance. D2 is used to protect the load from phase reversal. Fig. 8 illustrates the circuit diagram of the solar mobile charger connected to solar panels on one side and the mobile device on other side. (Fig.- 2) A circuit diagram of the panel connecting the solar panels to the main charging system of the device consists of four sections. In first section, there is a regulator circuit consisting of one IC and a Power Transistor. Property of the used IC is to regulate the Voltage from the range (25 Volt - 38 Volt) to 24 Volts which is easily available in the market. Means that at any input voltages, 24 Volts- onwards, output voltage will be fixed at 24 Volts. The designed circuit (Fig 2) consists of four sections. In first section, there is a regulator circuit consisting of one IC and a Power Transistor. Property of the used IC is to regulate the Voltage from the range (25 Volt - 38 Volt) to 24 Volts, At any input voltages, 24 Volts- onwards, output voltage would be fixed at 24 Volts. In the circuit, two solar plates connected in series (Fig. 3) having output voltage of 24 volts (in bright sunlight) have been used, generated voltag,e of the set will be more than 24 Volts. In this case, the circuit may get damaged as the actual circuit is designed to operate from the Voltage range of 22 to 24 volt. In diffused light generated voltage of the set may be less than 24 volt, which will not affect the original circuit. To increase the power capacity of the said IC one Power Transistor (T-1) has been used which is capable to carry the required current. To protect the actual circuit from the phase reversal from solar panel end, one rectifier (D- I) is used. Output of the regulator circuit goes to the inputs of the divider (Fig.-5), driver (Fig.-6) and Output (Fig. 7) circuits. The divider Circuit is used for selecting the required voltage signal by using a series combination of two fixed Resistances (R5 & R6) and one variable resistance (VR1). This voltage signal is amplified by Driver Section with the help of Transistor (T3 & T4), Capacitor (C2 & C3) and Resistance Network (Rl, R3, R4) Now, the amplified signal is fed to the output section. This section consists of two Power Transistors 2 x T 2 in parallel with a wire wound resistance (R2) to increasing the current carrying capacity. The wire wound resistance is used to protect the junctions of the Power Transistors. The Output Section finally delivers the required voltage to drive the Lap- Top/ other electronic devices. To protect the Lap- Top/ other electronic devices from the risk of phase reversal, another rectifier (D2) is also used. While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in are that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention. - We claim: 1) A solar energy powered adaptor for laptop comprises at least a pair of solar plates connected in series for generating the D.C. voltage from the solar rays, a voltage regulator circuit connected to the said pair of solar plates to regulate the voltage produced to the required voltage, a voltage divider connected to the said voltage regulator circuit to obtain the required voltage, amplifying circuit for amplifying the selected voltage signal from voltage divider characterized by a driver stage connected to the said voltage divider for positive feed back and a pair of powered transistor ( T 1 & T 4 ) connected in parallel through a wire bond resistor to increase current carrying capacity for supplying the amplified signal. 2) An adapter as claimed in claim 1, wherein the said voltage regulator circuit connected to the said solar panel for regulating the voltage produced up to a minimum fixed required level, comprises an Integrated circuit (7824) controlled by a power transistor ( R 2 ) and rectifier connected at the input Integrated circuit to avoid phase reversal. 3) An adapter as claimed in claim 1, wherein the said voltage divider circuit comprises of a pair of fixed resistor an one variable resistor shunted by a capacitor. 4) An adapter as claimed in claim 1, wherein the said amplifying circuit amplify the resulting voltage signal from the voltage divider. 5) An adapter as claimed in claim 1, wherein the said voltage divider circuit comprises of a pair of transistors, a pair of capacitors & resistance connected to a zener diode.. 6) A solar energy powered adaptor for laptop substantially as hereinbefore described with reference to the accompanying drawings. The present invention relates to an adapter for laptop and other electronic devices comprising a means for generating the D.C. voltage from the solar rays, a voltage regulator circuit connected to the said means to regulate the voltage produced to the required voltage, a voltage divider connected to the said voltage regulator circuit to obtain the different required voltage, amplifying means for amplifying the selected voltage signal from voltage divider, a driver stage connected to the said voltage divider for positive feed back, means for supplying the required supply to the device protecting the load from phase reversal.

Documents:

806-KOL-2006-CLAIMS-1.1.pdf

806-KOL-2006-CORRESPONDENCE-1.1.pdf

806-kol-2006-granted-abstract.pdf

806-kol-2006-granted-claims.pdf

806-kol-2006-granted-correspondence.pdf

806-kol-2006-granted-description (complete).pdf

806-kol-2006-granted-drawings.pdf

806-kol-2006-granted-examination report.pdf

806-kol-2006-granted-form 1.pdf

806-kol-2006-granted-form 18.pdf

806-kol-2006-granted-form 2.pdf

806-kol-2006-granted-form 26.pdf

806-kol-2006-granted-form 3.pdf

806-kol-2006-granted-form 5.pdf

806-kol-2006-granted-reply to examination report.pdf

806-kol-2006-granted-specification.pdf

806-KOL-2006-OTHERS.pdf