WO2002051128A3 - A converter in a cmos image sensor - Google Patents

A converter in a cmos image sensor Download PDF

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Publication number
WO2002051128A3
WO2002051128A3 PCT/CA2001/001773 CA0101773W WO0251128A3 WO 2002051128 A3 WO2002051128 A3 WO 2002051128A3 CA 0101773 W CA0101773 W CA 0101773W WO 0251128 A3 WO0251128 A3 WO 0251128A3
Authority
WO
WIPO (PCT)
Prior art keywords
pixel
converter
pixels
saturation
signal processor
Prior art date
Application number
PCT/CA2001/001773
Other languages
French (fr)
Other versions
WO2002051128A2 (en
Inventor
Justin Fortier
Original Assignee
Symagery Microsystems Inc
Justin Fortier
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Symagery Microsystems Inc, Justin Fortier filed Critical Symagery Microsystems Inc
Priority to US12/717,188 priority Critical patent/USRE42739E1/en
Priority to AU2002216854A priority patent/AU2002216854A1/en
Priority to US10/451,026 priority patent/US7339621B2/en
Publication of WO2002051128A2 publication Critical patent/WO2002051128A2/en
Publication of WO2002051128A3 publication Critical patent/WO2002051128A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/70—SSIS architectures; Circuits associated therewith
    • H04N25/71—Charge-coupled device [CCD] sensors; Charge-transfer registers specially adapted for CCD sensors
    • H04N25/75—Circuitry for providing, modifying or processing image signals from the pixel array
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/50—Control of the SSIS exposure
    • H04N25/53—Control of the integration time
    • H04N25/533—Control of the integration time by using differing integration times for different sensor regions

Abstract

The method and apparatus for processing pixel output signals from column lines in an imager having an array of pixels in rows and columns uses a sigma-delta type analog-to-digital converter to convert the output signals on each column line to digital signals and feeding them to a digital signal processor. The converter is monitored to stop sampling of a pixel with the detection of pixel saturation, which is carried out by counting a predetermined number of consecutive zeros in the converted signal. In addition, the next pixel in a column may be controlled to be read with the saturation of the previous pixel, and the next row of pixels may be controlled to be read with the saturation of the pixels in the previous row. Further, sets of a predetermined munber of converter output output samples are condensed by a decimator into binary numbers of predetermined bit length. The outputs of the decimators may be fed directly to the digital signal processor or they may be multiplexed to provide one or more inputs to the digital signal processor.
PCT/CA2001/001773 2000-12-19 2001-12-13 A converter in a cmos image sensor WO2002051128A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/717,188 USRE42739E1 (en) 2000-12-19 2001-12-13 Imager output signal processing
AU2002216854A AU2002216854A1 (en) 2000-12-19 2001-12-13 A converter in a cmos image sensor
US10/451,026 US7339621B2 (en) 2001-12-13 2001-12-13 Imager output signal processing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25633600P 2000-12-19 2000-12-19
US60/256,336 2000-12-19

Publications (2)

Publication Number Publication Date
WO2002051128A2 WO2002051128A2 (en) 2002-06-27
WO2002051128A3 true WO2002051128A3 (en) 2002-09-12

Family

ID=22971865

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2001/001773 WO2002051128A2 (en) 2000-12-19 2001-12-13 A converter in a cmos image sensor

Country Status (3)

Country Link
US (1) USRE42739E1 (en)
AU (1) AU2002216854A1 (en)
WO (1) WO2002051128A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7483067B2 (en) 2005-04-15 2009-01-27 Micron Technology, Inc. Column-parallel sigma-delta analog-to-digital conversion for imagers
US8477056B2 (en) * 2010-06-01 2013-07-02 Infinera Corporation Method, system, and apparatus for interpolating an output of an analog-to-digital converter
EP2758801B1 (en) * 2011-09-20 2019-11-06 Heptagon Micro Optics Pte. Ltd. Time of flight sensor with subframe compression and method
US20140085426A1 (en) * 2012-09-24 2014-03-27 Alces Technology, Inc. Structured light systems with static spatial light modulators
US11818479B2 (en) * 2020-05-14 2023-11-14 Board Of Trustees Of Michigan State University Sigma Delta quantization for images

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264940A (en) * 1990-10-08 1993-11-23 Olympus Optical Co., Ltd. Image sensing apparatus having exposure level and dynamic range control circuit
US5886659A (en) * 1996-08-21 1999-03-23 California Institute Of Technology On-focal-plane analog-to-digital conversion for current-mode imaging devices
EP0912043A2 (en) * 1997-10-27 1999-04-28 Texas Instruments Incorporated Improvements in or relating to image sensing devices
US5955899A (en) * 1997-01-27 1999-09-21 Intel Corporation Compact comparator

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69034198T2 (en) * 1989-11-06 2006-04-20 Canon K.K. Electronic still camera
US5248971A (en) * 1992-05-19 1993-09-28 Mandl William J Method and apparatus for multiplexed oversampled analog to digital modulation
US6021172A (en) * 1994-01-28 2000-02-01 California Institute Of Technology Active pixel sensor having intra-pixel charge transfer with analog-to-digital converter
US5461425A (en) * 1994-02-15 1995-10-24 Stanford University CMOS image sensor with pixel level A/D conversion
DE19715214C1 (en) * 1997-04-11 1998-07-02 Siemens Ag Image sensor with several image point sensor regions
US6606120B1 (en) * 1998-04-24 2003-08-12 Foveon, Inc. Multiple storage node full color active pixel sensors
JP2002529742A (en) * 1998-11-06 2002-09-10 オンガード システムズ，インク． Electronic circuit
US6473122B1 (en) * 1999-12-06 2002-10-29 Hemanth G. Kanekal Method and apparatus to capture high resolution images using low resolution sensors and optical spatial image sampling
US6765619B1 (en) * 2000-04-04 2004-07-20 Pixim, Inc. Method and apparatus for optimizing exposure time in image acquisitions
US6831684B1 (en) * 2000-05-09 2004-12-14 Pixim, Inc. Circuit and method for pixel rearrangement in a digital pixel sensor readout
WO2002095679A2 (en) * 2001-05-23 2002-11-28 Canesta, Inc. Enhanced dynamic range conversion in 3-d imaging
US7339621B2 (en) * 2001-12-13 2008-03-04 Psion Teklogix Systems, Inc. Imager output signal processing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264940A (en) * 1990-10-08 1993-11-23 Olympus Optical Co., Ltd. Image sensing apparatus having exposure level and dynamic range control circuit
US5886659A (en) * 1996-08-21 1999-03-23 California Institute Of Technology On-focal-plane analog-to-digital conversion for current-mode imaging devices
US5955899A (en) * 1997-01-27 1999-09-21 Intel Corporation Compact comparator
EP0912043A2 (en) * 1997-10-27 1999-04-28 Texas Instruments Incorporated Improvements in or relating to image sensing devices

Also Published As

Publication number Publication date
USRE42739E1 (en) 2011-09-27
AU2002216854A1 (en) 2002-07-01
WO2002051128A2 (en) 2002-06-27

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