The important feature of the logarithmic pixel is the non-linear response and very wide dynamic range using the property of non-linearity. On the other hand, the advantage of the LOFIC when compared with other techniques for wide dynamic range is the linear response and small motion artifact, but range is limited to maximally 100dB.  Since camera system often requires linear response and less distortion in moving image, the LOFIC is an excellent tequnique anyway.  The LOFIC and log-pixel are the technology of quite different category each other. I don't think the use of LOFIC in the logarithmic pixel helps for the impromement of wide  dynamic range imagers. The most difficult problem for the logarithmic pixel is an image lag.  Another merit of LOFIC pixel is low noise and no image lag because of the use of pinned photodiode and true CDS readout.  But, if you insist to use logarithmic pixel and improve the problem of image lag, there is a technique of linear-log response pixel using pinned photodiodes (presented at ISSCC 2005).  This pixel, however, has a problem of fixed-pattern noise which is created at the gray scale level of transition from linear to log.   Things are not easy, but therefore, we can survive in the field of R & D of image sensors Thank you for reading.

Thanks Shoji K

Enter your answer Thanks a lot, Shoji Kawahito. It was quite informative as well as interesting too. It helped a lot.

interesting, for the time being we are just working on linear pixel with CDS readout...