Patent ID: 8727971
Filing Date: 2014-05-20
Classification: A61B,G02B

Abstract:
1. A light-source driver of a light-source unit detachable from an endoscope body of a portable endoscope, said light-source driver comprising: a first switch that is biased in an Off-state when the light-source unit is detached from the endoscope body, and that switches to an On-state based on attachment of the light-source unit to the endoscope body; a pilot lamp which indicates that an illumination light source is being energized; a warning lamp which indicates that an output voltage of a battery is dropping to or below a predetermined value; a second switch that switches the status of said warning lamp between an On-state and an Off-state in connection with the On-state and the Off-state of said first switch; and a light-switcher that switches said pilot lamp to the Off-state and further enables said second switch when said second switch is set to the On-state and the output voltage has dropped to or below the predetermined value; wherein said second switch is set to the Off-state when the light-source unit is detached from the endoscope body; and wherein one contact of said first switch is connected to a power line and an other contact of said first switch is connected to a terminal that selects the On-state and the Off-state of said second switch.