The display pixels and resolution on array process are getting smaller and higher precision, for advanced small-pixel and high-resolution display applications. The paper proposed the characteristics of flaw detection in small-pixel design displays based on TFT liquid crystal displays with respect to electrical-physic characterization metrics. Observer studies resulted in small-sized pixel TFT array between the flaw detection performance and maker preference approaches. Detection performance factors provided information on the differences among small-pixel design for advanced display technologies .It also shown that critical pixel defect played an important role than previously seen in non-small pixel TFT array panels for managing process yield. The method of voltage imaging for detection, developed in this study provides an initial insight into the small-sized pixel designs for advanced and precision to diagnostic images in display devices.