Liquid crystal display driving device

Abstract

The invention relates to a liquid crystal display driving device. Flicker phenomenon caused by inconsistent light transmittance during application of two-way voltage can be effectively suppressed by applying a one-way voltage signal to a pixel electrode of a pixel region; power consumption of a driving circuit and the number of gamma resistors can be reduced to lower the cost due to the application of the one-way voltage; in addition, by generating a periodic alternating current voltage signal with a high voltage pulse on a common electrode or the pixel electrode, on one hand, the problem that a liquid crystal is easy to age due to the application of the one-way voltage to the pixel electrode can be solved, and on the other hand, impurity ions can be kept in a moving saturated state all the time due to the high voltage pulse; therefore, the phenomenon of residual images can be improved.

Description

technical field [0001] The invention relates to driving of liquid crystal display, in particular to a driving device of liquid crystal display, which belongs to the field of driving of liquid crystal display. Background technique [0002] At present, a Liquid Crystal Display (LCD for short) has become the most important type of display in the display. At present, when the pixels on the LCD display colors, they all adopt a bidirectional driving method. For the display of the same gray scale, if a forward voltage is applied to the corresponding pixel in one frame, the forward voltage is the voltage applied to the pixel electrode on the array substrate and the voltage applied to the common electrode on the color filter substrate. The difference, such as +2V, to drive the liquid crystal molecules between the array substrate and the color filter substrate to deflect at a certain angle; and in the next frame (still displaying the same gray scale), apply a negative voltage, such a...

AI Technical Summary

Problems solved by technology

The existing technology mainly prevents the formation of afterimages by reducing the content of impurities as much as possible and applying a nearly symmetrical driving voltage to the pixels. However, impurities cannot be completely eliminated, and the residence of impurity ions is sensitive to voltages in different directions. The degrees are also different, so long-term application of different near-symmetrical voltages on different pixels will still lead to uneven migration of impurity ions, and finally an afterimage will still be formed

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