Control circuit for controlling a noise reduction thin film transistor in a shift register unit and method of reducing noise
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United States of America Patent
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Feb 12, 2019
Grant Date -
Oct 18, 2018
app pub date -
Nov 4, 2016
filing date -
Feb 3, 2016
priority date (Note) -
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Abstract
The present application discloses a control circuit for controlling a noise reduction thin film transistor in a shift register unit. The control circuit includes a timer for initiating a timing process when the shift register is turned on, to obtain an operating time of the shift register; a threshold voltage calculator coupled to the timer for calculating a present threshold voltage based on the operating time, a gate voltage of the noise reduction thin film transistor, and an initial threshold voltage of the noise reduction thin film transistor; and a gate voltage controller coupled to the threshold voltage calculator for adjusting the gate voltage of the noise reduction thin film transistor during the noise reduction phase, to control the noise reduction thin film transistor in an ON state during the noise reduction phase.
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