OPTICAL ELEMENT DRIVING CIRCUIT
First Claim
1. An optical element driving circuit comprising:
- an illumination capacitor charged to a first voltage and coupled with an optical output element;
a capacitive voltage divider circuit coupled with the optical output element and comprising a boost capacitor charged to a second voltage that is a fraction of the first voltage; and
a triggering circuit coupled with the capacitive voltage divider circuit and configured to place a sum of the first voltage and the second voltage across the optical output element.
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Accused Products
Abstract
An optical element driving circuit flexibly configures energy sources to cause illumination with an optical output element, such as a flash lamp. The energy sources include an illumination capacitor and a capacitive voltage divider circuit coupled with the optical output element. The illumination capacitor may be charged to a first voltage and a boost capacitor of the capacitive voltage divider circuit may be charged to a second voltage that is a fraction of the first voltage. The optical element driving circuit also includes a triggering circuit coupled with the capacitive voltage divider circuit. The triggering circuit is configured to place a sum of the first voltage and the second voltage across the optical output element.
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Citations
20 Claims
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1. An optical element driving circuit comprising:
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an illumination capacitor charged to a first voltage and coupled with an optical output element; a capacitive voltage divider circuit coupled with the optical output element and comprising a boost capacitor charged to a second voltage that is a fraction of the first voltage; and a triggering circuit coupled with the capacitive voltage divider circuit and configured to place a sum of the first voltage and the second voltage across the optical output element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An optical element driving circuit comprising:
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an illumination capacitor charged to a first voltage and coupled with an optical output element; a capacitive voltage divider circuit coupled with the optical output element and comprising multiple capacitors each charged to a fraction of the first voltage; and a controller coupled with the capacitive voltage divider circuit and configured to select zero or more capacitors from the capacitive voltage divider circuit for use to drive the optical output element. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A flash lamp driving circuit comprising:
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an illumination capacitor charged to a first voltage and coupled with a flash lamp of a visual emergency warning device; a capacitive voltage divider circuit coupled with the flash lamp and comprising a first capacitor and second capacitor, where the first capacitor is configured to be charged to a second voltage that is a fraction of the first voltage, where the second capacitor is configured to be charged to a third voltage that is a fraction of the first voltage; a triggering circuit coupled with the capacitive voltage divider circuit and configured to place a sum of the first voltage and the second voltage across the flash lamp, where the triggering circuit is configured to prevent the third voltage from being placed across the flash lamp.
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Specification