Controllable charge paths, and related methods
First Claim
1. A device comprising:
- a power source with a positive lead and a negative lead;
charge storage with a first capacitor component and a second capacitor component coupled in series, and a center tap between the first capacitor component and the second capacitor component;
a first charge path including a first positive switch and a first negative switch and disposed between the positive lead and the negative lead, the first charge path traversing the first capacitor component and the center tap but not traversing the second capacitor component, the first capacitor component and the center tap disposed between the first positive switch and the first negative switch, the first positive switch and the first negative switch being dedicated to the first charge path; and
a second charge path including a second positive switch and a second negative switch and disposed between the positive lead and the negative lead, the second charge path traversing the second capacitor component and the center tap but not traversing the first capacitor component, the second capacitor component and the center tap disposed between the second positive switch and the second negative switch, the second positive switch and the second negative switch being dedicated to the second charge path, each of the first and second charge paths being controllable to allow charge current to flow from the power source to one or substantially simultaneously to both of the first and second capacitor components.
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Accused Products
Abstract
Mobile devices have limited power sources. In some cases, such as camera flash operations in cell phones or digital cameras, the power required to provide bright illumination is significant and exceeding the battery voltage level. In order to supply burst power or continuous high power to light sources, such as white LEDs (light emitting diodes), mobile devices typically employ charge storage functioning as energy reservoir that can supply the required power. One such charge storage is a supercapacitor that can supply the needed power repeatedly by discharging and recharging. Various embodiments of the present invention include devices and methods for providing the charge energy and controlling the charge and discharge operations.
59 Citations
49 Claims
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1. A device comprising:
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a power source with a positive lead and a negative lead; charge storage with a first capacitor component and a second capacitor component coupled in series, and a center tap between the first capacitor component and the second capacitor component; a first charge path including a first positive switch and a first negative switch and disposed between the positive lead and the negative lead, the first charge path traversing the first capacitor component and the center tap but not traversing the second capacitor component, the first capacitor component and the center tap disposed between the first positive switch and the first negative switch, the first positive switch and the first negative switch being dedicated to the first charge path; and a second charge path including a second positive switch and a second negative switch and disposed between the positive lead and the negative lead, the second charge path traversing the second capacitor component and the center tap but not traversing the first capacitor component, the second capacitor component and the center tap disposed between the second positive switch and the second negative switch, the second positive switch and the second negative switch being dedicated to the second charge path, each of the first and second charge paths being controllable to allow charge current to flow from the power source to one or substantially simultaneously to both of the first and second capacitor components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A device for providing charge energy to a load, the device comprising:
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a power source with a positive lead and a negative lead; charge storage with a first capacitor component and a second capacitor component coupled in series, and a center tap between the first capacitor component and the second capacitor component; a load operatively coupled across the charge storage to receive charge energy from the charge storage; a first charge path including a first positive switch and a first negative switch and disposed between the positive lead and the negative lead, the first charge path traversing the first capacitor component and the center tap but not traversing the second capacitor component, the first capacitor component and the center tap disposed between the first positive switch and the first negative switch, the first positive switch and the first negative switch being dedicated to the first charge path; and a second charge path including a second positive switch and a second negative switch, the second charge path traversing the second capacitor component and the center tap but not traversing the first capacitor component, the second capacitor component and the center tap disposed between the second positive switch and the second negative switch, the second positive switch and the second negative switch being dedicated to the second charge path; the first and second charge paths being adapted to pass charge current from the power source substantially separately to one of the first or second capacitor components. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A device comprising:
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a power source with a positive lead and a negative lead; charge storage with a first capacitor component and a second capacitor component coupled in series, and a center tap between the first capacitor component and the second capacitor component; a first charge path including a first positive switch and a first negative switch and disposed between the positive lead and the negative lead, the first charge path traversing the first capacitor component and the center tap but not traversing the second capacitor component, the first capacitor component and the center tap disposed between the first positive switch and the first negative switch, the first positive switch and the first negative switch being dedicated to the first charge path; and a second charge path including a second positive switch and a second negative switch and disposed between the positive lead and the negative lead, the second charge path traversing the second capacitor component and the center tap but not traversing the first capacitor component, the second capacitor component and the center tap disposed between the second positive switch and the second negative switch, the second positive switch and the second negative switch being dedicated to the second charge path, each of the first and second charge paths having a switch control input adapted to provide open and closed switching control to allow charge current to pass from the power source to one or substantially simultaneously to both of the first and second capacitor components. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A device comprising:
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a power source with a positive lead and a negative lead; charge storage with a first capacitor component and a second capacitor component coupled in series, and a center tap between the first capacitor component and the second capacitor component; a first charge path including a first positive switch and a first negative switch and disposed between the positive lead and the negative lead, the first charge path traversing the first capacitor component and the center tap but not traversing the second capacitor component, the first capacitor component and the center tap disposed between the first positive switch and the first negative switch, the first positive switch and the first negative switch being dedicated to the first charge path; and a second charge path including a second positive switch and a second negative switch and disposed between the positive lead and the negative lead, the second charge path traversing the second capacitor component and the center tap but not traversing the first capacitor component, the second capacitor component and the center tap disposed between the second positive switch and the second negative switch, the second positive switch and the second negative switch being dedicated to the second charge path, the first and second charge paths each having an input operatively coupled to a voltage regulator and adapted to provide charge current control. - View Dependent Claims (46, 47)
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48. A method comprising:
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connecting to power source with a positive lead and a negative lead; providing charge storage with a first capacitor component and a second capacitor component coupled in series, and a center tap between the first capacitor component and the second capacitor component; providing a first charge path comprising a first positive switch and a first negative switch and disposed between the positive lead and the negative lead, the first charge path traversing the first capacitor component and the center tap but not traversing the second capacitor component, the first capacitor component and the center tap disposed between the first positive switch and the first negative switch, the first positive switch and the first negative switch being dedicated to the first charge path; providing a second charge path comprising a second positive switch and a second negative switch and disposed between the positive lead and the negative lead, the second charge path traversing the second capacitor component and the center tap but not traversing the first capacitor component, the second capacitor component and the center tap disposed between the second positive switch and the second negative switch, the second positive switch and the second negative switch being dedicated to the second charge path; and controlling each of the first and second charge paths to allow charge current to flow from the power source to one or substantially simultaneously to both the first and second capacitor components. - View Dependent Claims (49)
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Specification