Shutdown discharge circuit and shutdown discharge method

Abstract

The invention relates to a shutdown discharging circuit and a shutdown discharging method, and the shutdown discharging circuit comprises a voltage detection unit which is used for detecting the current initial voltage difference between the two ends of at least one liquid crystal capacitor; the voltage judgment unit is used for judging whether each initial voltage difference value exceeds a liquid crystal overturning threshold value or not; and the voltage adjusting unit is used for adjusting the voltage at the two ends of the liquid crystal capacitor corresponding to the initial voltage difference value to a target voltage difference value when the initial voltage difference value exceeds the liquid crystal overturning threshold value. When the initial voltage difference value exceeds the liquid crystal overturning threshold value, the voltage at the two ends of the liquid crystal capacitor corresponding to the initial voltage difference value is adjusted to the target voltage difference value, so that the voltage at the two ends of the liquid crystal capacitor in the corresponding pixel unit cannot reach the overturning condition, and the corresponding liquid crystal capacitor is in a discharging state; therefore, the black screen state in the shutdown state is kept, and the phenomenon of uneven display caused by liquid crystal overturning in the next startup is avoided.

Description

technical field [0001] The present application relates to the field of display technology, and in particular, to a shutdown discharge circuit and a shutdown discharge method. Background technique [0002] Liquid Crystal Display (LCD) technology realizes display by utilizing liquid crystal material to emit light, and has been widely used in all aspects of life. [0003] In the related art, a liquid crystal display panel is provided with a plurality of sub-pixel units arranged in rows and columns to form a sub-pixel array. Each sub-pixel unit is provided with a thin film transistor (Thin Film Transistor, TFT). A plurality of scan lines and a plurality of data lines are used for driving the sub-pixel array. For example, one scan line may be electrically connected to all the thin film transistors in a row of sub-pixel units, respectively, to control the thin film transistors of the corresponding row to be turned on or off; Voltage data is written in the pixel unit, thereby dr...

AI Technical Summary

Problems solved by technology

[0004] However, after the liquid crystal display panel is turned off, there is still a voltage margin in each sub-pixel unit, that is, the voltage in each sub-pixel unit may be in a non-zero state, resulting in deflection of the corresponding liquid crystal, and the screen after shutdown cannot remain black. state, thus affecting the screen display after the next boot

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