An amplifier placed within a pixel is advantageous, as it offers gain at the first stage in the signal readout chain, but is limited by non-linearity. This paper presents a readout circuit technique, that addresses the non-linearity issue of a current-mode pixel. The proposed circuit named Pixel Follower compensates for the non-linearity by inverting it via feedback implemented locally. This avoids having to reduce the in-pixel amplifier gain, or sending any feedback signal to the pixel itself, thus greatly simplifying the design. The circuit has been manufactured in a Low Temperature Polycrystalline Silicon on foil process with a target application of an all LTPS-TFT large-area imager. The circuit operates at 5V supply and draws 200uW power with a readout interval of 50us. Dynamic range of 2V, the integral non-linearity is measured to be 2% outperforming the current state-of-the-art for large-area imagers.