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System and method for reducing read-out noise in a pixel array

A pixel array and pixel technology, applied in the field of systems and methods for reducing readout noise in a pixel array, capable of solving problems such as unavailability

Inactive Publication Date: 2007-02-07
APTINA IMAGING CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These types of errors are often difficult to fully eliminate during manufacturing
Therefore, even if an error occurs in the column readout circuit 160, it will render the entire IC unusable due to the repetitive nature of data acquisition in the readout circuits 162a-162n.

Method used

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  • System and method for reducing read-out noise in a pixel array
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  • System and method for reducing read-out noise in a pixel array

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Embodiment Construction

[0017] The following discussion is presented to enable any person skilled in the art to make and use the invention. The general principles described herein may be applied to embodiments and applications other than those detailed above without departing from the spirit and scope of the present invention. The present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed or suggested herein.

[0018] FIG. 3 illustrates a portion of an imaging system 300 for collecting and storing incident light using a pixel array 340 according to an embodiment of the invention. In this embodiment, the readout path for each pixel is processed row by row by readout path circuitry 370 . System 300 includes pixel array 340, which for the purposes of this embodiment may be a CMOS array. Those skilled in the art will recognize that any array of pixels may also be used, such as a CCD array. By co...

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PUM

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Abstract

A system and method utilizing an imaging device able to distribute readout paths for pixel signals in a captured image. The device includes a pixel array organized into a plurality of sets of pixels, each pixel in each set of pixels operable to store a signal corresponding to a respective light level. The device further includes a readout circuit having a plurality of readout paths coupled to the pixel array, each readout path operable to read the signal stored in a corresponding pixel in a set of pixels, each readout path corresponding to one pixel during a readout phase for each set of pixels. The device further includes a readout path selection circuit coupled to the readout circuit and operable set a pattern for matching one readout path to one pixel for each set of pixels for each readout phase, the pattern differing from set to set.

Description

Background technique [0001] Digital cameras and digital imaging devices typically use pixel arrays, such as CMOS arrays (Complementary Metal Oxide Semiconductors) or CCD arrays (Charge Coupled Devices), for capturing light on a pixel-by-pixel basis to form digital images. When light hits a typical pixel, a light-sensitive device such as a photodiode is charged to a level corresponding to the amount of light incident on the pixel. Once charge is stored on the photosensitive device, the charge can then be used to generate electrical pulses indicative of corresponding light levels. The electrical pulse is usually represented as a voltage, which can be processed and stored according to known analog and digital processing methods. One such known method can be described with respect to the conventional imaging system of FIG. 1 . [0002] Figure 1 shows a portion of a conventional imaging system 100 for collecting incident light and storing it as an image. The system includes a pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N3/15H04N5/335H04N5/357H04N5/378
CPCH04N5/3658H04N25/677H04N3/1568H04N25/779H04N25/74
Inventor C·G·迈尔斯
Owner APTINA IMAGING CORP