DRIVING DEVICE, LIGHT-EMITTING DEVICE, PROJECTION DEVICE AND CONTROL METHOD
First Claim
1. A driving device, comprising:
- a power circuit that can modify an output current or an output voltage of an output terminal configured to have a load connected thereto;
an output capacitor connected between the output terminal of the power circuit and a reference potential node;
a switching device connected between the output terminal of the power circuit and the reference potential node; and
a control unit that controls the output current or the output voltage of the power circuit,wherein the control unit turns the switching device ON and OFF, andwherein the control unit controls the output current or the output voltage of the power circuit while the switching device is ON such that a voltage of the output terminal of said power circuit while the switching device is ON becomes less than or equal to a voltage applied to the load while said switching device is OFF thereafter.
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Accused Products
Abstract
A driving device is provided with: a power circuit in which it is possible to modify an output current value of an output terminal configured to have a load connected thereto; an output capacitor connected between the output terminal of the power circuit and a reference potential node; a switching element connected between the output terminal of the power circuit and the reference potential node; and a control unit that controls the output current value of the power circuit.
The control unit turns the switching element ON and OFF and controls the output current value of the power circuit during a period in which the switching element is ON such that the voltage of the output terminal of the power circuit during this period is equal to or lower than the voltage applied to the load during a period when this load is OFF.
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Citations
19 Claims
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1. A driving device, comprising:
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a power circuit that can modify an output current or an output voltage of an output terminal configured to have a load connected thereto; an output capacitor connected between the output terminal of the power circuit and a reference potential node; a switching device connected between the output terminal of the power circuit and the reference potential node; and a control unit that controls the output current or the output voltage of the power circuit, wherein the control unit turns the switching device ON and OFF, and wherein the control unit controls the output current or the output voltage of the power circuit while the switching device is ON such that a voltage of the output terminal of said power circuit while the switching device is ON becomes less than or equal to a voltage applied to the load while said switching device is OFF thereafter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of controlling a driving device having a power circuit that can modify an output current or an output voltage of an output terminal configured to have a load connected thereto, an output capacitor connected between the output terminal of the power circuit and a reference potential node, a switching device connected between the output terminal of the power circuit and the reference potential node, and a control unit that controls the output current or the output voltage of the power circuit, the method comprising:
controlling the switching device to be ON and OFF and controlling the output current or the output voltage of the power circuit while the switching device is ON such that a voltage of the output terminal of said power circuit while the switching device is ON becomes less than or equal to a voltage applied to the load while said switching device is OFF thereafter.
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17. A driving device, comprising:
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a power circuit that can modify an output current or an output voltage of an output terminal configured to have a load connected thereto; an output capacitor connected between the output terminal of the power circuit and a reference potential node; a switching device connected between the output terminal of the power circuit and the reference potential node; and a control unit that controls the output current or the output voltage of the power circuit, wherein the control unit sets the output current or the output voltage of the power circuit to a high level, a low level that is lower than this high level, and a middle level that is higher than the low level but lower than the high level, in this order in cycle repeatedly, wherein the control unit turns the switching device OFF when the output current or the output voltage of the power circuit is set to the high level and the middle level, and wherein the control unit turns the switching device ON when the output current or the output voltage of the power circuit is set at the low level. - View Dependent Claims (18, 19)
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Specification