Solar powered lamp having an auxiliary startup device
First Claim
1. A device for lighting a cold-cathode fluorescent lamp comprising:
- a direct current power supply unit for providing a low voltage direct current;
an auxiliary startup circuit connected to the direct current power unit; and
a DC/AC inverter circuit connected to the auxiliary startup circuit, which generates a higher voltage alternating current from the output of the auxiliary startup circuit to light the cold-cathode fluorescent lamp, wherein the auxiliary startup circuit generates across the input terminals of the DC/AC inverter circuit a voltage as about twice as the direct current voltage output from the direct current power supply unit.
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Accused Products
Abstract
Disclosed is a solar powered lamp adopting a cold-cathode fluorescent lamp and an auxiliary startup device which can improve the efficiency of the voltaic-photo transformation when lighting the cold-cathode fluorescent lamp. The device comprises a direct current power unit, a DC/AC inverter circuit for generating a high voltage alternating current from the DC voltage to light a CCFL; and an auxiliary startup circuit disposed between the DC power supply unit and the DC/AC inverter circuit for generating across the input terminals of the DC/AC inverter circuit a voltage of about twice of the DC voltage output from the DC power supply unit.
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Citations
18 Claims
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1. A device for lighting a cold-cathode fluorescent lamp comprising:
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a direct current power supply unit for providing a low voltage direct current;
an auxiliary startup circuit connected to the direct current power unit; and
a DC/AC inverter circuit connected to the auxiliary startup circuit, which generates a higher voltage alternating current from the output of the auxiliary startup circuit to light the cold-cathode fluorescent lamp, wherein the auxiliary startup circuit generates across the input terminals of the DC/AC inverter circuit a voltage as about twice as the direct current voltage output from the direct current power supply unit. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A solar powered lamp having a cold-cathode fluorescent lamp comprising:
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a photovoltaic cell receiving sunlight and generating electrical energy;
an electrical storage device coupled to said photovoltaic cell, storing the electrical energy generated by said photovoltaic cell and providing a low voltage direct current;
an inverter circuit for generating a higher voltage alternating current from the low DC voltage to light the cold-cathode fluorescent lamp; and
an auxiliary startup circuit connected between the electrical storage device and the inverter circuit for generating across the input terminals of the DC/AC inverter circuit a voltage as about twice as the DC voltage output from the electrical storage device. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A method for lighting a cold-cathode fluorescent lamp, comprising the steps of:
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generating across the input terminals of a DC/AC inverter circuit a voltage as about twice as a DC voltage output from a DC power supply device utilizing an auxiliary startup circuit; and
converting the generated voltage to a higher AC voltage to activate the cold-cathode fluorescent lamp. - View Dependent Claims (16, 17, 18)
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Specification