Dual light source voltage-modulated reciprocal control circuit for scanner
OwnerChin-Lin Changinventor
Life of this patent
Estimating the term…
Abstract
A dual light source voltage-modulated reciprocal control circuit for a scanner. The circuit includes a voltage modulation circuit, a first lamp driving circuit, a second lamp driving circuit and a reciprocal control circuit. The voltage-modulating circuit generates a modulated voltage whose magnitude can be adjusted through pulse width modulation of a square wave. The first lamp driving circuit receives the modulated voltage to drive a first lamp. Similarly, the second lamp driving circuit receives the modulated voltage to drive a second lamp. The reciprocal control circuit redirects the modulated voltage to the first lamp driving circuit or the second lamp driving circuit according to the dictate of a reciprocal logic signal.
Claims23
A dual light source voltage-modulated reciprocal control circuit for a scanner, comprising:
- a voltage-modulation circuit for generating a modulation voltage whose magnitude may be adjusted according to a square wave having pulse width modulation capacity;
- a first lamp driving circuit for receiving the modulated voltage and driving a first lamp;
- a second lamp driving circuit for receiving the modulated voltage and driving a second lamp;
- and
- a reciprocal control circuit for sending the modulated voltage to the first lamp driving circuit or the second lamp driving circuit according to the dictate of a reciprocal logic signal.
An apparatus, comprising:
- a dual light source voltage-modulated reciprocal control circuit, comprising:
- a voltage-modulation circuit for generating a modulation voltage;
- a first lamp driving circuit for receiving the modulated voltage and driving a first lamp;
- a second lamp driving circuit for receiving the modulated voltage and driving a second lamp;
- and
- a reciprocal control circuit for sending the modulated voltage to at least one of the first lamp driving circuit or the second lamp driving circuit.
A method, comprising:
- generating a modulation voltage;
- receiving the modulated voltage and driving a first lamp;
- receiving the modulated voltage and driving a second lamp;
- and
- sending the modulated voltage to a first lamp driving circuit or a second lamp driving circuit according to the dictate of a reciprocal logic signal.
Dependencies are inferred from the claim text.