A multimode pixel of a pixel array is provided. The multimode pixel includes a photodetector, an image sensing circuit, a pulse detection circuit, and an image readout path coupled between the image sensing circuit and at least one readout conductor of the pixel array to transmit image signals from
A multimode pixel of a pixel array is provided. The multimode pixel includes a photodetector, an image sensing circuit, a pulse detection circuit, and an image readout path coupled between the image sensing circuit and at least one readout conductor of the pixel array to transmit image signals from the image sensing circuit to the at least one readout conductor. The multimode pixel further includes a pulse readout path different from the image readout path, wherein the pulse readout path is coupled between the pulse detection circuit and the at least one readout conductor to transmit pulse data from the pulse detection circuit to the at least one readout conductor, and wherein the image readout path is controlled independently from the pulse readout path.
대표청구항▼
1. A readout integrated circuit (ROTC) comprising: an image readout conductor;a pulse readout conductor that is independent of the image readout conductor;an array of readout circuits, each readout circuit associated with a respective pixel of a pixel array, each pixel having a photodetector, wherei
1. A readout integrated circuit (ROTC) comprising: an image readout conductor;a pulse readout conductor that is independent of the image readout conductor;an array of readout circuits, each readout circuit associated with a respective pixel of a pixel array, each pixel having a photodetector, wherein each readout circuit comprises:an image sensing circuit;an image readout path coupled between the pixel's image sensing circuit and the image readout conductor to transmit image signals from the image sensing circuit to the image readout conductor;a pulse detection circuit; anda pulse readout path that is independent of the image readout path, the pulse readout path being coupled between the pixel's pulse detection circuit and the pulse readout conductor to transmit pulse data from the pulse detection circuit to the pulse readout conductor;an image controller that outputs an image control signal that controls the image readout path; anda pulse controller that outputs a pulse control signal different from the image control signal that controls the pulse readout path, wherein the pulse controller further selects at least one subset of the pulse data output by the pulse detection circuit to be transmitted to the pulse readout conductor, each subset being included in a respective pulse detection sub-window,wherein the pulse controller further controls a first frame rate at which a first pulse detection sub-window is output to the pulse readout conductor and a second frame rate, different than the first frame rate, at which a second pulse detection sub-window is output to the pulse readout conductor. 2. The ROIC of claim 1, wherein timing associated with output of the image and pulse control signals is independent of one another. 3. The ROIC of claim 1, wherein the image control signal and the pulse control signal include, respectively, at least one of: (a) an image row select signal that enables readout along the image readout path and a pulse row select signal that enables readout along the pulse readout path, and (b) an image reset signal that resets the image sensing circuit and a pulse reset signal that resets the pulse detection circuit. 4. The ROIC of claim 1, wherein the image signals transmitted to the image readout conductor are analog signals, and the pulse data transmitted to the pulse readout conductor are at least one of binary and digital. 5. The ROIC of claim 1, wherein: the image controller further controls a first frame rate at which the image signals are output to the image readout conductor, andthe pulse controller further controls a second frame rate at which the pulse data are output to the pulse readout conductor, wherein the pulse controller controls the second frame rate asynchronously from the image controller controlling the first frame rate. 6. A method of controlling image signal and pulse data readout from a readout integrated circuit (ROIC), the method comprising: controlling transmission of image signals from individual pixels of a pixel array to at least one readout conductor;controlling, asynchronously to transmission of the image signals, transmission of pulse data from the individual pixels of the pixel array to the at least one readout conductor;selecting at least one subset of the pulse data output by the pixel array to be transmitted to the at least one readout conductor, wherein each subset is included in a respective pulse detection sub-window; andcontrolling a first frame rate at which a first pulse detection sub-window is output to the at least one readout conductor and a second frame rate, different than the first frame rate, at which a second pulse detection sub-window is output to the at least one readout conductor. 7. The method of claim 6, wherein controlling transmission of the image signals includes controlling transmission of the image signals along individual image readout paths between respective image sensing circuits of the pixel array and the at least one readout conductor, and controlling transmission of the pulse data includes controlling transmission of the pulse data along individual pulse readout paths between respective pulse detection circuits of the pixel array and the at least one readout conductor. 8. The method of claim 6, further comprising: controlling a first frame rate at which the image signals are output to the at least one readout conductor; andcontrolling a second frame rate at which the pulse data are output to the at least one readout conductor, the second frame rate being controlled asynchronously from controlling the first frame. 9. The method of claim 6, wherein the pulse data transmitted to the at least one readout conductor are at least one of binary and digital. 10. A readout integrated circuit (ROIC) comprising: an image readout conductor;a pulse readout conductor that is independent of the image readout conductor;an array of readout circuits, each readout circuit associated with a respective pixel of a pixel array, each pixel having a photodetector, wherein each readout circuit comprises:an image sensing circuit;an image readout path coupled between the pixel's image sensing circuit and the image readout conductor to transmit image signals from the image sensing circuit to the image readout conductor;a pulse detection circuit; anda pulse readout path that is independent of the image readout path, the pulse readout path being coupled between the pixel's pulse detection circuit and the pulse readout conductor to transmit pulse data from the pulse detection circuit to the pulse readout conductor;an image controller that outputs an image control signal that controls the image readout path; anda pulse controller that outputs a pulse control signal different from the image control signal that controls the pulse readout path,wherein the image controller receives an image exposure control signal that controls framing of the image signals, and the pulse controller receives a pulse exposure control signal that controls framing of the pulse data, the image and pulse exposure control signals being received from different sources and timed independently of one another.
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이 특허에 인용된 특허 (7)
Woolaway, James T.; Schlesselmann, John D., Detector array for high speed sampling of an optical pulse.
Elkind, Shimon; Ilan, Elad; Dobromislin, Roman, Detector pixel signal readout circuit using an AC signal component in implementing an event detection mode per pixel.
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