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

Abstract

A 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.

Value‐added integration of functions for silicon‐on‐glass (SOG) based on LTPS technologies

“…This technology has been applied successfully to not only small-sized displays, but also to medium-and large-screen products. 1,2 Circuit integration yields a lighter and thinner display with a drastic reduction in connection pins. It improves the reliability against repeatable mechanical shocks as well as relaxes the limit of the pitch between connection terminals, which is suitable for a high-resolution display.…”

28.2: Development of a 312ppi 4.1‐inch XGA Display with Low Temperature Poly‐Si Technology

“…Recently, the development of low-temperature poly-Si (LTPS) TFT for high performance active matrix liquid crystal display has been flourished [1]- [5]. Among them, small and middle-sized panels below 10 inches are especially focused due to the cost and performance advantage over a-Si displays [1]- [3].…”

Staggered voting for TMR shift register chains in poly‐Si TFT‐LCDs

“…If the yield of driving circuits drops, Poly-Si TFT-LCDs may not be able to compete with conventional TFT-LCDs. This is a reason why only the gate driver, which is much simpler than the data driver, is integrated on the panel in today's mid-size Poly-Si TFT-LCDs [3][4]. This paper focuses on the yield of S/R chains in PolySi TFT-LCDs.…”

“…Note that if any S/R in a chain does not work, it means that the entire driving circuits will not work. Toshiba uses a TMR structure to implement the gate driver S/R chain in its 10.4˝ XGA Poly-Si TFT-LCD [3]. In this conventional TMR structure, as shown in Figure 3, each S/R stage consists of three S/Rs and a majority voter.…”