Thursday, March 04, 2010

ClairPixel Begins Mass Production at Dongbu

Business Wire: Dongbu HiTek announced that it has commenced mass-production of 300-kpixel WDR sensors at the 130nm node for ClairPixel. The sensor is intended for for automobile "Black Box" applications.

According to iSuppli, ASP for sensors serving specialized automotive, medical device and security applications is currently four times greater than those serving mobile phones and digital cameras.


  1. What WDR technique is used in this chip? Lateral overflow? Multiple exposure w/memory? Log pixels?

  2. Double exposure. They published some details in December 2009 issue of IEEE Transactions on Electron Devices.

  3. I thought double exposure required a frame buffer? Their website indicates they don't need extra memory?

  4. Do you have paper no. and link to this paper ???

  5. Here is the paper:

    Dynamic-Range Widening in a CMOS Image Sensor Through Exposure Control Over a Dual-Photodiode Pixel

    Electron Devices, IEEE Transactions on
    Volume: 56 Issue:12
    On page(s): 3000 - 3008
    ISSN: 0018-9383
    INSPEC Accession Number: 10978955
    Digital Object Identifier: 10.1109/TED.2009.2033327
    First Published: 03 November 2009
    Current Version Published: 17 November 2009
    Sponsored by: IEEE Electron Devices Society


    In this paper, we propose a technique for automatic-exposure control and synthesis for a wide-dynamic-range sensor based on dual-exposure method. Using the proposed technique, a sensor can adaptively adjust its exposure to widely varying illumination conditions and consequently accomplish an infinite dynamic range in theory. An artificial test bench consisting of a virtual illumination source and its imaging system is introduced to verify the performance of the proposed technique. Simulations show how a wider dynamic range can be achieved by the proposed technique. It is also shown that a VGA-resolution CMOS image sensor developed based on the proposed technique can support up to a 119-dB dynamic range.

    They use both dual exposure and two different sized photodiodes in pixel (a correction to my previous comment). The paper mostly talks about the dual exposure optimization, which mislead me at the beginning.


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