Richargeable portable light with multiple charging systems

• US 20020067143A1
• Filed: 12/06/2000
• Published: 06/06/2002
• Est. Priority Date: 12/06/1999
• Status: Active Grant

• Current Assignee: Kerr Corporation (Envista Holdings Corporation)
• Original Assignee: Don Snyder, Mr Mark Robinett
• Inventors: Snyder, Don, Robinett, Mark I.
• Granted Patent: US 6,563,269 B2
• Time in Patent Office: Days
• US Class Current: 315/291
• CPC Class Codes: H05B 45/345 Current stabilisation; Maintaining constant current
• CPC Class Codes: H05B 45/37 Converter circuits
• CPC Class Codes: H05B 45/375 using buck topology
• CPC Class Codes: H05B 45/395 Linear regulators
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

A rechargeable portable light having a housing member with an opening for the emission of light, and several possible charging systems including a solar panel, an AC charger, an auto charger, and a hand crank generator charger. An electronic circuit is located within the housing member and includes at least one super capacitor for power storage. The super capacitor is charged by a charging system. A power inverter circuit, a mechanical switch method, or a DC-DC IC is used to increase voltage and regulate current. The circuit also includes at least one light emitting diode (LED) positioned near the opening in the housing member, and a switch interposed between the capacitor and the LED. The switch is closed when power is delivered from the capacitor to the LED.

Claims

1. A rechargeable portable light, comprising:

a housing member having an opening for the emission of light;

at least one charging means;

an electronic circuit for providing power for and control of the emission of light, said circuit located within said housing member, said circuit including at least one super capacitor for power storage, said super capacitor charged by said charging means, a voltage limiting circuit interposed between said super capacitor and said charging means, at least one light emitting diode (LED) positioned near the opening in said housing member, and a switch interposed between said capacitor and said LED, said switch being open when the capacitor is charging and closed when power is delivered from said capacitor to said at least one LED.

2. The rechargeable portable light of claim 1 further including an inverter circuit for increasing and maintaining voltage from said super capacitor to said LED.

3. The rechargeable portable light of claim 1, further including a battery electrically coupled to said electronic circuit for power backup.

4. The rechargeable portable light of claim 3 further including a switch between said inverter circuit and said voltage limiting circuit and said battery, said switch having three positions, said positions including off, on from said super capacitor, and on from said battery.

5. The rechargeable portable light of claim 1 wherein said at least one charging means comprises a solar panel located on the exterior of said housing and electrically connected to said voltage limiting circuit.

6. The rechargeable portable light of claim 1, wherein said charging means comprises an external power supply selected from the group consisting of an auto charger, an AC charger, and a hand crank generator charger, and further including a charging jack adapted for electrically connecting said charging means to said electronic circuit.

7. The rechargeable portable light of claim 1, wherein said charging means comprises both a solar panel located on the exterior of said housing and electrically connected to said voltage limiting circuit, and an external power supply selected from the group consisting of an auto charger, an AC charger, and a hand crank generator charger, and wherein said electronic circuit further includes a charging jack adapted for electrically connecting said charging means to said electronic circuit.

8. The rechargeable portable light of claim 1, wherein said LED is a high brightness white LED.

9. The rechargeable portable light of claim 1, wherein said light has at least two super capacitors for providing power to said at least one LED.

10. The rechargeable portable light of claim 9, wherein said electronic circuit further includes a switch mechanism interposed between said charging means and said at least two super capacitors, said switch mechanism including a first and second plurality of sub-switches, such that when said second plurality of sub-switches are closed, said first sub-switches are open, and said at least two super capacitors are put in parallel for charging at specified voltages, and such that when said first plurality of sub-switches are closed, said second plurality of sub-switches are open and said super capacitors are put in series for current to flow to said LED.

11. The rechargeable portable light of claim 1, wherein said light is a flashlight.

12. The rechargeable portable light of claim 1, wherein said light is an outdoor landscaping light.

13. The rechargeable portable light of claim 1, wherein said light is an outdoor house light.

14. The rechargeable portable light of claim 1, wherein said light is an indoor portable light.

15. The rechargeable portable light of claim 1, wherein said light is a bicycle light.

16. The rechargeable portable light of claim 1, wherein said light is a portable reading light.

17. The rechargeable portable light of claim 1, wherein said super capacitor has a capacitance of 100 F at 2.5 volts.

18. The rechargeable portable light of claim 1, wherein said super capacitor has a capacitance of 100 F at voltages higher than 3 volts, and wherein power is transferred to said LED by a DC-DC IC.

19. The rechargeable portable light of claim 1, wherein said super capacitor has a capacitance of 100 F at voltages higher than 3 volts, and wherein power is transferred to said LED by a resistor.

20. A power inverter circuit for providing power for and control of the emission of light from a portable light, said circuit comprising:

at least one super capacitor for power storage, said super capacitor having a capacitance of 100 F at voltages of 3 volts and higher, a solar panel, a zener diode interposed between said solar panel and said super capacitor, charging circuit, a fuse interposed between said charging circuit and said super capacitor, at least one light emitting diode (LED) positioned near the opening in said housing member, and a switch interposed between said capacitor and said LED, said switch being open when the capacitor is charging and closed when power is delivered from said capacitor to said at least one LED.