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Low‐temperature poly‐Si TFT data drivers for an SVGA a‐Si TFT‐LCD panel
Author(s) -
Suzuki A.,
Hashido R.,
Urakabe T.,
Iwata A.,
Inoue M.,
Nagata H.
Publication year - 2001
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.1844662
Subject(s) - liquid crystal display , thin film transistor , offset (computer science) , amplifier , electronic circuit , shift register , operational amplifier , electrical engineering , input offset voltage , biasing , computer science , voltage , power consumption , materials science , optoelectronics , power (physics) , cmos , engineering , physics , layer (electronics) , composite material , programming language , quantum mechanics
— Low‐temperature poly‐Si TFT data drivers for an SVGA a‐Si TFT‐LCD panel have been developed. The data drivers include shift registers, sample‐and‐hold circuits, and operational amplifiers, and drive LCD panels using a line‐at‐a‐time addressing method. To reduce the power consumption of the shift register, a dot‐clock control circuit has been developed. Using this circuit, the power consumption of the shift register has been reduced to 36% of that of conventional circuits. To cancel the offset voltage generated by the operational amplifier, an offset cancellation circuit for low‐temperature poly‐Si TFTs has been developed. This circuit is also able to avoid any unstable operation of the operational amplifier. Using this circuit, the offset voltage has been reduced to one‐third of the value without using the offset cancellation circuit. These data drivers have been connected to an LCD panel and have realized an SVGA display on a 12.1‐in. a‐Si TFT‐LCD panel.