US 12,439,148 B2
Imaging device, endoscope system, camera unit, scope, and imaging method
Susumu Yamazaki, Tachikawa (JP); and Takaharu Tani, Hachioji (JP)
Assigned to OLYMPUS MEDICAL SYSTEMS CORP., Tokyo (JP)
Filed by OLYMPUS MEDICAL SYSTEMS CORP., Hachioji (JP)
Filed on Jan. 9, 2024, as Appl. No. 18/407,600.
Application 18/407,600 is a continuation of application No. PCT/JP2021/027168, filed on Jul. 20, 2021.
Prior Publication US 2024/0147056 A1, May 2, 2024
Int. Cl. H04N 23/65 (2023.01); H04N 23/50 (2023.01)
CPC H04N 23/65 (2023.01) [H04N 23/555 (2023.01)] 8 Claims
OG exemplary drawing
 
1. An imaging device comprising a camera unit and a control unit connected to each other by a power source line and a video signal line, a first power source voltage transferred by the power source line being input to the camera unit as a second power source voltage,
the camera unit including:
an image sensor configured to generate a video signal by using the second power source voltage;
a load circuit configured to consume the second power source voltage as a load current in a voltage-monitoring period;
a transmission buffer configured to output the video signal as a current to the video signal line in a video output period different from the voltage-monitoring period; and
a switch configured to connect the power source line and the video signal line in the voltage-monitoring period and disconnect the power source line and the video signal line in the video output period; and
the control unit including;
a voltage generation circuit configured to output the first power source voltage to the power source line;
a signal reception circuit configured to receive the video signal transferred from the camera unit by the video signal line;
a voltage measurement circuit configured to measure a value of the second power source voltage transferred from the camera unit by the video signal line; and
a voltage control circuit configured to adjust a value of the first power source voltage in the video output period by controlling the voltage generation circuit based on the value measured by the voltage measurement circuit.