Battery-powered light source device for endoscope
First Claim
1. A battery-powered light source device for an endoscope, comprising a DC/DC converter having:
- a comparator for comparing an output voltage supplied to a light source lamp with a specific reference voltage; and
an adjuster circuit for adjusting the output voltage supplied to the light source lamp on a basis of the comparison result of the comparator so that a specific lamp voltage will be achieved;
whereinsaid DC/DC converter raises or lowers a power supply voltage of an internal battery and supplies the raised or lowered power supply voltage to the light source lamp that generates illuminating light supplied to the endoscope, on a basis of the output signal of the adjuster circuit, wherein the adjuster circuit is equipped with an oscillator that generates a reference clock signal, and a modulator modulates the pulse width by being set by the reference clock signal of the oscillator and being reset by the comparison result of the comparator.
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Accused Products
Abstract
A battery-powered light source device 5 has an DC/DC converter 61 that boosts the supply voltage of a battery 51 and supplies electrical power to a lamp 31, and, inside this DC/DC converter 61, are provided a comparator 65 that compares a specific reference voltage to the output voltage of a DC/DC converter 61, and a control component 66 that keeps the output voltage from the DC/DC converter 61 at a specific lamp voltage on the basis of the comparison result of this comparator 65, whereby the supply voltage of the battery 51 is boosted and the optimal lamp voltage is obtained. Consequently, the battery-powered light source device 5 allows the brightness of the lamp to be adjusted and a high step-up efficiency to be obtained, and the battery can therefore be used more efficiently, and a more convenient use of the endoscope is possible.
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Citations
26 Claims
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1. A battery-powered light source device for an endoscope, comprising a DC/DC converter having:
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a comparator for comparing an output voltage supplied to a light source lamp with a specific reference voltage; and an adjuster circuit for adjusting the output voltage supplied to the light source lamp on a basis of the comparison result of the comparator so that a specific lamp voltage will be achieved;
whereinsaid DC/DC converter raises or lowers a power supply voltage of an internal battery and supplies the raised or lowered power supply voltage to the light source lamp that generates illuminating light supplied to the endoscope, on a basis of the output signal of the adjuster circuit, wherein the adjuster circuit is equipped with an oscillator that generates a reference clock signal, and a modulator modulates the pulse width by being set by the reference clock signal of the oscillator and being reset by the comparison result of the comparator. - 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, 24, 25, 26)
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Specification