Image sensor and imaging system adopting analog buffer
AssigneePixart Imaging Inc.
InventorEN-FENG HSU
Life of this patent
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Abstract
An image sensor including an optoelectronic conversion circuit, a read circuit, a timing control and a serial interface is provided. The optoelectronic conversion circuit is configured to store a charge amount. The read circuit is coupled to the optoelectronic conversion circuit via a bit line. The timing control is configured to send at least one control signal to control the optoelectronic conversion circuit to store the charge amount and control the read circuit to read the charge amount stored in the optoelectronic conversion circuit. The serial interface is coupled to the timing control and configured to send a trigger signal to the timing control to activate the timing control to send the at least one control signal.
Claims20
An image sensor comprising:
- an optoelectronic conversion circuit configured to store a charge amount;
- a read circuit coupled to the optoelectronic conversion circuit via a bit line;
- a timing control configured to send at least one control signal to control the optoelectronic conversion circuit to store the charge amount and control the read circuit to read the charge amount stored in the optoelectronic conversion circuit;
- and
- a serial interface coupled to the timing control and configured to send a trigger signal to the timing control to activate the timing control to send the at least one control signal.
An imaging system comprising:
- a host configured to send a read request;
- a serial interface configured to send image data to the host and send a trigger signal when receiving the read request;
- a sensor array configured to store a plurality of charge amounts;
- a read circuit coupled to the sensor array via a plurality of bit lines;
- and
- a timing control configured to send, after receiving the trigger signal, a control signal to control the read circuit to read the charge amounts stored in the sensor array to the serial interface to be configured as the image data.
An image sensor comprising:
- a sensor array configured to sequentially output a first frame and a second frame, the sensor array comprising an optoelectronic conversion circuit configured to store a first charge amount for a first storage time corresponding to the first frame and store a second charge amount for a second storage time corresponding to the second frame,
- wherein the first storage time is not equal to the second storage time.
Dependencies are inferred from the claim text.