Improvement of Interpixel Uniformity in Carbon Nanotube Field Emission Display by Luminance Correction Circuit

• Published in: IEEE transactions on electron devices 2008-03, Vol.55 (3), p.768-773
• Main Authors: KANG, Mun-Seok, YUN, Young-Jun, LEE, Chul-Ho, LEE, Jung-Won, CHOE, Deok-Hyeon, BAEK, Kwang-Hyun, KIM, Suki
• Format: Article
• Language: English
• Subjects: Applied sciences; Carbon nanotube field emission display (CNT-FED); Carbon nanotubes; Cathode ray tubes; Circuits; Design engineering; Devices; Display; Electronics; Exact sciences and technology; Field emission; Flat panel displays; HDTV; Image quality; interpixel uniformity; Luminance; luminance correction circuit; Nanoscale devices; Nonuniformity; Panels; Prototypes; self-emissive device; Signal processing; Variability
• ISSN: 0018-9383; 1557-9646
• DOI: 10.1109/TED.2007.915055

Interpixel uniformity is critical to image quality, and is hard to be improved by structural reformation of emissive elements because of nonuniformity in luminance characteristics of subpixels in self-emissive device like the carbon nanotube field emission display (CNT-FED). In this paper, we discuss the improvement of the interpixel uniformity by individually controlling the luminance of all subpixels in a display panel. We propose a prototype CNT-FED with improved interpixel uniformity using luminance correction circuitry. The analysis of interpixel uniformity with the proposed luminance correction circuit shows that the index of interpixel uniformity increases about 8% with only about 10% luminance reduction ratio that is a relatively small penalty compared to the enhancement of the interpixel uniformity. The proposed correction method can also be used to ensure improvement of the interpixel uniformity in large-size CNT-FED panels.