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US 2025/0030962 A1Published application
Triple conversion gain pixel
AssigneeOmniVision Technologies, Inc.
InventorsRui Wang, Takayuki Goto
Life of this patent
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Abstract
A pixel array includes a plurality of pixel cells, each including a photodiode configured to photogenerate image charge in response to the incident light, a first floating diffusion (FD) coupled to receive the image charge from the photodiode, a reset transistor coupled between a voltage source and the first FD, a second FD coupled between the first FD and ground, a first dual FD transistor coupled between the first and second FDs. Second FDs of first and second pixel cells are coupled. Second FDs of third and fourth pixel cells are coupled.
Claims20
A pixel array, comprising:
- a plurality of pixel cells arranged in rows and columns, wherein each of the pixel cells is configured to generate a respective image signal in response to incident light, wherein each of the pixel cells includes:
- a photodiode configured to photogenerate image charge in response to the incident light;
- a first floating diffusion (FD) coupled to receive the image charge from the photodiode;
- a reset transistor coupled between a voltage source and the first FD;
- a second FD coupled between the first FD and ground;
- and
- a first dual floating diffusion transistor coupled between the first and second FDs,
- wherein a second FD of a first one of the pixel cells is coupled to a second FD of a second one of the pixel cells, and
- wherein a second FD of a third one of the pixel cells is coupled to a second FD of a fourth one of the pixel cells.
6 more elements
A pixel array, comprising:
- a plurality of pixel cells arranged in rows and columns, wherein each of the pixel cells is configured to generate a respective image signal in response to incident light, wherein each of the pixel cells includes:
- a photodiode configured to photogenerate image charge in response to the incident light;
- a first floating diffusion (FD) coupled to receive the image charge from the photodiode;
- a reset transistor coupled between a voltage source and the first FD;
- a second FD coupled between the first FD and ground;
- a first dual floating diffusion transistor coupled between the first and second FDs;
- a third FD coupled between the second FD and ground;
- and
- a second dual floating diffusion transistor coupled between the second and third FDs,
- wherein a third FD of a first one of the pixel cells is coupled to a third FD of a second one of the pixel cells.
7 more elements
An imaging system, comprising:
- a pixel array, including:
- a plurality of pixel cells arranged in rows and columns, wherein each of the pixel cells is configured to generate a respective image signal in response to incident light, wherein each of the pixel cells includes:
- a plurality of photodiodes configured to photogenerate image charge in response to the incident light;
- a first floating diffusion (FD) coupled to receive the image charge from the photodiodes;
- a reset transistor coupled between a voltage source and the first FD;
- a second FD coupled between the first FD and ground;
- a first dual floating diffusion transistor coupled between the first and second FDs;
- a third FD coupled between the second FD and ground;
- and
- a second dual floating diffusion transistor coupled between the second and third FDs,
- wherein a second FD of a first one of the pixel cells is coupled to a second FD of a second one of the pixel cells,
- wherein a second FD of a third one of the pixel cells is coupled to a second FD of a fourth one of the pixel cells,
- wherein a third FD of the first one of the pixel cells is coupled to a third FD of the third one of the pixel cells, and
- wherein a third FD of the second one of the pixel cells is coupled to a third FD of the fourth one of the pixel cells;
- a plurality of bitlines coupled to the pixel array;
- control circuitry coupled to the pixel array to control operation of the pixel array;
- and
- readout circuitry coupled to the pixel array through the bitlines to readout image data from the pixel array.
15 more elements
Dependencies are inferred from the claim text.