Imaging system, endoscope system, camera unit, and scope of endoscope
AssigneeOlympus Medical Systems Corp.
InventorMasato Osawa
Life of this patent
Estimating the term…
Abstract
In an imaging system, a camera unit and a control unit are connected via a source voltage line and an image signal line. The camera unit includes: a pixel array configured to generate an accumulation signal and a reset signal; a source voltage measuring circuit configured to output a voltage value (VDDA) indicating a second source voltage in the pixel array; a reference voltage generating circuit configured to generate a reference voltage (VBGR); a plurality of AD conversion devices; and a signal transmitting unit. The control unit includes: a source voltage supply device configured to supply a first source voltage (Vout) to the source voltage line; and a signal receiving device configured to receive the image signal and the result of the second AD conversion.
Claims10
An imaging system in which a camera unit and a control unit are connected via a source voltage line and an image signal line,
- wherein the camera unit includes:
- a pixel array configured to generate an accumulation signal and a reset signal;
- a source voltage measuring circuit configured to output a voltage value (VDDA) indicating a second source voltage in the pixel array;
- a reference voltage generating circuit configured to generate a reference voltage (VBGR);
- a plurality of AD conversion devices provided to correspond to pixel columns of the pixel array and provided to correspond to the source voltage measuring circuit and the reference voltage generating circuit and configured to perform first AD conversion of a difference between the accumulation signal and the reset signal of the pixel array and second AD conversion of a difference between a value (VDDA) and the reference voltage (VBGR) together;
- and
- a signal transmitting unit configured to output results of the first AD conversion and the second AD conversion, and
- wherein the control unit includes:
- a source voltage supply device configured to supply a first source voltage (Vout) to the source voltage line;
- and
- a signal receiving device configured to receive the image signal and the result of the second AD conversion.
A camera unit in an imaging system in which the camera unit and a control unit are connected via a source voltage line and an image signal line, the camera unit comprising:
- a pixel array configured to generate an accumulation signal and a reset signal;
- a source voltage measuring circuit configured to output a voltage value (VDDA) indicating a second source voltage in the pixel array;
- a reference voltage generating circuit configured to generate a reference voltage (VBGR);
- a plurality of AD conversion devices provided to correspond to pixel columns of the pixel array and provided to correspond to the source voltage measuring circuit and the reference voltage generating circuit and configured to perform first AD conversion of a difference between the accumulation signal and the reset signal of the pixel array and second AD conversion of a difference between a value (VDDA) and the reference voltage (VBGR) together;
- and
- a signal transmitting unit configured to output results of the first AD conversion and the second AD conversion performed by the AD conversion devices.
Dependencies are inferred from the claim text.