Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2008-04-29
2008-04-29
Lefkowitz, Sumati (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S098000, C377S069000
Reexamination Certificate
active
07365727
ABSTRACT:
A shift register is provided with a shift register section composed of a plurality of stages of flip-flops that operate in synchronization with a clock signal, and level shifters for boosting a start signal lower than a driving voltage and for applying the same to both ends of the shift register section, and the shift register is capable of switching the shift direction in accordance with the switching signal. The foregoing level shifters are current-driving-type level shifters that can operate even in the case where the transistor characteristics are inferior or in the case of fast operations, and that can carry out level shifting even with a start signal having a small amplitude. Furthermore, the foregoing level shifters are provided at both ends of the shift register section, respectively, and one of the same stops operating in accordance with a switching signal, so that consumed power should decrease. Consequently, there can be provided a shift register that is capable of shifting in two directions, that can normally operate even with an input signal having a small amplitude, and that therefore consumes less electric power.
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S. Steiner, et al.SID 88 Digest, High-Performance Column Driver for Gray-Scale TFEL Displays, pp. 31-34.
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Brownlow Michael James
Cairns Graham Andrew
Kubota Yasushi
Maeda Kazuhiro
Satoh Masakazu
Conlin David G.
Edwards Angell Palmer & & Dodge LLP
Lefkowitz Sumati
Moon Seokyun
Sharp Kabushiki Kaisha
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