DRIVING DEVICE AND ELECTRONIC APPARATUS USING THE SAME
First Claim
1. A driving device used for receiving an alternating current (AC) voltage from a power supply, and generating a driving voltage to drive a luminous element to emit light, the driving device comprising:
- a dimmer for receiving the AC voltage, and generating a primary voltage for controlling the brightness of the luminous element;
a rectifying-filtering unit for rectifying and filtering the primary voltage to generate a secondary voltage;
a rectifying-dividing unit for rectifying and dividing the primary voltage to generate a detecting voltage;
a control unit for receiving the secondary voltage, and generating a pulse voltage whose duty cycle is variable with the detecting voltage; and
a voltage transforming unit for transforming the secondary voltage to the driving voltage according to the pulse voltage.
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Accused Products
Abstract
A driving device includes a dimmer, a rectifying-filtering unit, a rectifying-dividing unit, a control unit, and a voltage transforming unit. The dimmer is used for receiving an alternating current (AC) voltage from a power supply, and generating a primary voltage for controlling the brightness of a luminous element. The rectifying-filtering unit is used for rectifying and filtering the primary voltage to generate a secondary voltage. The rectifying-dividing unit is used for rectifying and dividing the primary voltage to generate a detecting voltage. The control unit is used for receiving the secondary voltage, and generating a pulse voltage whose duty cycle is variable with the detecting voltage. The voltage transforming unit is used for transforming the secondary voltage to a driving voltage for driving the luminous element to emit light according to the pulse voltage. A related electronic apparatus is also provided.
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Citations
20 Claims
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1. A driving device used for receiving an alternating current (AC) voltage from a power supply, and generating a driving voltage to drive a luminous element to emit light, the driving device comprising:
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a dimmer for receiving the AC voltage, and generating a primary voltage for controlling the brightness of the luminous element; a rectifying-filtering unit for rectifying and filtering the primary voltage to generate a secondary voltage; a rectifying-dividing unit for rectifying and dividing the primary voltage to generate a detecting voltage; a control unit for receiving the secondary voltage, and generating a pulse voltage whose duty cycle is variable with the detecting voltage; and a voltage transforming unit for transforming the secondary voltage to the driving voltage according to the pulse voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A driving device used for receiving an alternating current (AC) voltage from a power supply, and generating a driving voltage to drive a luminous element to emit light, the driving device comprising:
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a dimmer for receiving the AC voltage, and generating a primary voltage for controlling the brightness of the luminous element; a rectifying-filtering unit for rectifying and filtering the primary voltage to generate a secondary voltage; a rectifying-dividing unit for rectifying and dividing the primary voltage to generate a detecting voltage; a control unit for comparing the detecting voltage with a first reference voltage and a second reference voltage, and generating a pulse voltage whose duty cycle is variable if the detecting voltage is larger than a first reference voltage and smaller than a second reference voltage; and a voltage transforming unit for transforming the secondary voltage to the driving voltage according to the pulse voltage. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An electronic apparatus comprising:
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a luminous element; and an driving device for receiving an alternating current (AC) voltage from a power supply and generating a driving voltage to drive the luminous element to emit light, the driving device comprising; a dimmer for receiving the AC voltage, and generating a primary voltage for controlling the brightness of the luminous element; a rectifying-filtering unit for rectifying and filtering the primary voltage to generate a secondary voltage; a rectifying-dividing unit for rectifying and dividing the primary voltage to generate a detecting voltage; a control unit for receiving the secondary voltage, and generating a pulse voltage whose duty cycle is variable with the detecting voltage; and a voltage transforming unit for transforming the secondary voltage to the driving voltage according to the pulse voltage. - View Dependent Claims (17, 18, 19, 20)
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Specification