A Cmos Image Sensor Zero Power Dynamic Range Increasing Technique

• doi: 10.1109/ICSENS.2009.5398509
• title: A CMOS image sensor zero power dynamic range increasing technique
• publisher: IEEE
• isbn: 978-1-4244-5335-1
• issn: 1930-0395
• partnum: 09CH38151
• rank: 624
• access_type: LOCKED
• content_type: Conferences
• abstract: A development of in-pixel dynamic range (DR) increasing technique without charging extra power for CMOS image sensor was realized in this paper. Recently, many researches reported that high dynamic range can be achieved through processing the image signals with ADCs or counters built inside the pixel, and some other methods require adjustable circuit block to maneuver photo-generated charges by a longer integration time. However, the inevitable consumption of power due to additional circuits alleviates the practicality. In this paper, a CMOS image sensor based on 3T active pixel sensor (APS) with 5.5 ¿m pixel pitch is investigated, successfully increasing DR without charging additional power by implementing a total of 4 sets of image arrays, of which 3 are new designs and one is typical type as control group. The arrays are 32 × 32 pixels, implemented in a 0.18 ¿m CMOS fabrication process, where photodiode has an n-well and p-substrate structure. Testing result is an increment of DR by estimated 7 to 18 dB among the experimental groups with no power consumption. The idea of in-pixel DR enhancement technique is verified, and one conclusion is made that in-pixel analog design is one direction for designers.
• article_number: 5398509
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5398509
• html_url: https://ieeexplore.ieee.org/document/5398509/
• abstract_url: https://ieeexplore.ieee.org/document/5398509/
• publication_title: SENSORS, 2009 IEEE
• conference_location: Christchurch, New Zealand
• conference_dates: 25-28 Oct. 2009
• publication_number: 5379507
• is_number: 5398121
• publication_year: 2009
• publication_date: 25-28 Oct. 2009
• start_page: 1644
• end_page: 1647
• citing_paper_count: 1
• citing_patent_count: 3
• download_count: 262
• insert_date: 20100122
• index_terms:
  • ieee_terms:
    • CMOS image sensors
    • Dynamic range
    • Pixel
    • Sensor arrays
    • Signal processing
    • Counting circuits
    • CMOS process
    • Fabrication
    • Photodiodes
    • Testing
  • dynamic_index_terms:
    • Dynamic Range
    • Image Sensor
    • Camera Sensor
    • Integration Time
    • Photodiode
    • High Dynamic Range
    • Array Images
    • Array Tomography
    • Extra Power
    • Photo-generated Charge
    • Pixel Pitch
    • Sensor Pixel
    • Light Intensity
    • Voltage Drop
    • Potential Drop
    • IR Drop
    • Photocurrent
    • Voltage Difference
    • Voltage Deviation
    • Fill Factor
    • Inverted Regions
    • Voltage Swing
    • Junction Capacitance
    • Switching Transistors
• isbn_formats:
  • format: CD, value: 978-1-4244-5335-1, isbnType: New-2005
  • format: Print ISBN, value: 978-1-4244-4548-6, isbnType: New-2005
• authors:
  • Author Name: Tsung-Hsun Tsai
    Affiliation: Department of Computer, Science & Engineering, York University, Toronto, ONT, Canada
    Author URL: https://ieeexplore.ieee.org/author/38102063500
    ID: 38102063500
    Order: 1
    Author Affiliations:
    • Department of Computer, Science & Engineering, York University, Toronto, ONT, Canada
  • Author Name: Ching-Chun Wang
    Affiliation: Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan
    Author URL: https://ieeexplore.ieee.org/author/37440784200
    ID: 37440784200
    Order: 2
    Author Affiliations:
    • Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan

Image Sensor

• sensor_type: CMOS
• resolution: 32x32 pixels
• dynamic_range: 7 to 18 dB
• pixel_size: 5.5 µm
• dark_current: Not specified

Optical Data

• focal_length: Not specified
• aperture: Not specified
• field_of_view: Not specified
• distortion: Not specified

Performance Metrics

• shutter_speed: 30 ms

Applications & Benefits

• cell_imaging: Used in various imaging applications including smartphones and medical devices.
• benefits: Increased dynamic range without additional power consumption, improved fill factor.

Supporting Organizations

• supported_by: York University, National Cheng Kung University

Manuscript Details

• publication_date: 25-28 Oct. 2009

Relevancy Score

• score: 10
• missing_fields:
  • quantum_efficiency
  • readout_speed
  • noise_sources
  • microlenses
  • on_chip_colour_filters
  • global_or_rolling_shutters
  • backside_illumination

Processed JSON Filename

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