IMAGING SYSTEMS HAVING DUAL STORAGE GATE OVERFLOW CAPABILITIES
First Claim
1. An image sensor pixel comprising:
- a photosensitive element;
a floating diffusion region;
first and second charge storage regions coupled respectively to first and second parallel paths between the photosensitive element and the floating diffusion region;
a transistor having first and second terminals, the first charge storage region being coupled to the first terminal, the floating diffusion region being coupled to the first terminal, and the second charge storage region being coupled to the second terminal; and
a charge storage structure coupled to the transistor.
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Accused Products
Abstract
An image sensor pixel may include a photodiode that generates first charge for a first frame and second charge for a second frame, first and second storage gates coupled to the photodiode, a floating diffusion coupled to the first storage gate through a first transistor, a second transistor coupled to the second storage gate, and a capacitor coupled to the floating diffusion through a third transistor. The image sensor pixel may output image signals associated with the first charge generated by the photodiode for the first image frame while the photodiode concurrently generates the second charge for the second image frame. The second storage gate may be used to store overflow charge. Overflow charge for the second frame may be stored at the second storage gate while image signals associated with the first image frame are read out from capacitor and the floating diffusion.
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20 Claims
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1. An image sensor pixel comprising:
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a photosensitive element; a floating diffusion region; first and second charge storage regions coupled respectively to first and second parallel paths between the photosensitive element and the floating diffusion region; a transistor having first and second terminals, the first charge storage region being coupled to the first terminal, the floating diffusion region being coupled to the first terminal, and the second charge storage region being coupled to the second terminal; and a charge storage structure coupled to the transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An image sensor pixel comprising:
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a photodiode; a floating diffusion region; first and second charge storage regions coupled along first and second separate paths between the photodiode and the floating diffusion region, respectively; a first transistor coupled to the floating diffusion region; a capacitor having a first terminal coupled to a voltage source and a second terminal coupled to the first transistor; and a second transistor that couples the voltage source to the floating diffusion region. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An image sensor pixel comprising:
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a photosensitive element; a floating diffusion region; first and second storage gates coupled in parallel between the photosensitive element and the floating diffusion region; a transistor having first and second terminals, wherein the floating diffusion region is coupled to the first terminal of the transistor, and the first and second storage gates are coupled to the first terminal of the transistor; and a capacitor coupled to the second terminal of the transistor. - View Dependent Claims (19, 20)
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Specification