Apparatus, method and system for reducing motion blur in an image capture device
OwnerSik Piu Kwaninventor
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Abstract
An image capture device, methods and system for reducing blurring or streaking of a captured image induced by the movement of an object past the image capture device. During the image capture cycle, intermediate light values in each pixels within the image capture device are transferred to an adjacent pixels allowing the integration of the light values to follow the movement of the object being captured.
Claims18
A pixel in an image capture device, the pixel comprising:
- a photosensitive device that integrates a charge proportional to the number of photons striking the photosensitive device during an integration period;
- a transferring device that detects the instantaneous integrated charge in the photosensitive device during the integration period and transfers a signal of equal charge to a second pixel in response to a transfer control signal;
- and
- a receiving device that receives a signal from a third pixel and sets the instantaneous integrated charge in the photosensitive device to the level of the received signal.
A method for integrating a charge in a pixel of an image capture device, the method comprising:
- setting the charge in a photosensitive device in the pixel to a reference voltage;
- integrating the charge over an integration period where the change in the charge voltage is proportional to the number of photons striking the photosensitive device during the integration period;
- transferring a value of the instantaneous integrated charge prior to the end of the integration period in response to a transfer control signal;
- and
- receiving an integrated charge value and setting the charge in the photosensitive device to the received integrated charge value and continuing the integration of the charge.
A method of forming a pixel cell of an image capture device, the method comprising:
- forming a photosensitive device in the pixel cell that integrates a charge which is proportional to the number of photons striking the photosensitive device;
- forming at least one transistor in the pixel cell responsive to drive a first signal externally to an adjacent pixel in response to a transfer control signal where the first signal represents the instantaneous charge on the photosensitive device;
- and
- forming a device that receives a second signal from an adjacent pixel and sets the charge of the photosensitive device to the value of the second signal where the second signal represents the instantaneous charge on a photosensitive device in the adjacent pixel.
A image scanning system for reading optical codes, the system comprising:
- an optical code image scanner comprising:
- an image capture device that captures an image of the optical code, the device comprising:
- an array of pixels that capture the image, a pixel of the array of pixels comprising:
- a photosensitive device that integrates a charge proportional to the number of photons striking the photosensitive device during an integration period;
- a transferring device that detects the instantaneous integrated charge in the photosensitive device during the integration period and transfers a signal of equal charge to a second pixel in response to a transfer control signal;
- and
- a receiving device that receives a signal from a third pixel and sets the instantaneous integrated charge in the photosensitive device to the level of the received signal.
Dependencies are inferred from the claim text.