XGA Resolution Research Articles

15.2: A 10.4‐in. XGA Low‐Temperature Poly‐Si TFT‐LCD for Mobile PC Applications

AbstractA 10.4‐inch TFT‐LCD with XGA resolution has been developed using low‐temperature poly‐Si technology. We have newly developed a circuit construction and a driving method for this LCD. Positive and negative video signals are separately applied to video buslines from two D‐A conversion ICS. The integrated data‐line driver circuits operate with four multiplexing‐blocks and eight‐phase parallel video inputs. The integrated scan‐line driver circuits have shift registers operating at 10V voltage with redundancy function. High aperture ratio of 61% was realized. These result in small data‐line driver circuit width of 3.7mm, low module power consumption of 2.3W, and high reliability.

46.1: Invited Paper: A 15‐in. XGA TFT‐AFLCD with Quasi‐dc Driving Scheme for Monitor Applications

We have developed a 15‐inch TFT driven anti‐ferroelectric LCD with XGA resolution for monitor applications; this LCD is the largest of its type and has the highest resolution reported so far. Even in the case of XGA resolution, higher contrast ratio than 100:1 has been achieved by applying novel quasi‐DC driving scheme. Fast response time of less than 50mS in the worse case of gray level that is less than half that of TN‐LCD and wide viewing angle of ±70 horizontally and vertically have also been obtained.

Wide‐viewing‐angle 13.3‐in. XGA displays with in‐plane switching mode of nematic LCs addressed by TFTs

Abstract— We have developed a 13.3‐in. TFT‐LCD employing a new, wide‐viewing‐angle “super” TFT technology utilizing the in‐plane switching mode of nematic liquid crystals. The new TFT‐LCD has XGA resolution (1024 × RGB × 768 pixels), displaying 262,144 colors, providing vertical and horizontal viewing angles of 140°. This is far wider than that of a conventional TFT display, which is restricted to about 40° vertically and 90° horizontally.

Evolution of flat-panel displays

The evolution in performance and manufacturability of liquid-crystal displays has created a new reality in the electronic information displays industry. LCD's now outnumber all other flat-panel displays in production volume, by more than two orders of magnitude. LCD's may equal CRT's in market sales by the year 2000. However, LCD's are still an order of magnitude more expensive than comparable performing CRT's. LCD's are enabling new products, such as personal digital assistants, moving map navigators, picture telephones, etc., which could not he readily done with CRTs because of their size and sensitivity to ambient illuminations. The LCD technology in various modes, from passive twisted nematic to active matrix, is being used in all product sizes, from the 0.7-in camcorder viewfinder to the 14-in full-color display with XGA resolution. Full color is very important in future products and any flat-panel display technology without it will be relegated to niche markets. >