Low power thin film transistor liquid crystal display control chip, drive device

Abstract

The present invention provides a control method for a thin film transistor liquid crystal display signal, comprising the steps of: setting the common electrode to a high voltage in the first time period P1 of a row period, and correspondingly setting the source voltage corresponding to the negative voltage column to be lower than The high voltage makes the output signal of the negative voltage column relatively negative; in the second time period P2 of the row cycle, the common electrode is set to a normal voltage, and the source corresponding to the positive voltage column is set accordingly The pole voltage is higher than the normal voltage so that the output signal of the positive voltage column is relatively positive. The present invention also provides a corresponding driving device and a display control chip. Through the present invention, when P_Buffer or N_Buffer is reduced by half Realize the dot inversion mode with the same effect in the prior art, thereby greatly saving the area of ​​the display control chip for the thin film transistor liquid crystal display device, and also reducing the power consumption of such a display control chip.

Description

technical field [0001] The present invention relates to a thin film transistor liquid crystal display device, especially a thin film transistor liquid crystal display device using a dot inversion mode, especially a display control chip used in a low power point inversion thin film transistor liquid crystal display device, and a corresponding driving device for A display control method for controlling the stable display of these low power point inversion thin film transistor liquid crystal display devices. Background technique [0002] Although thin-film transistor liquid crystal display devices have been used for a long time, even with the rapid development of contemporary technology, thin film transistor liquid crystal display devices can display high-resolution images, so they are mostly used as display devices such as televisions, personal computers, and mobile phone displays. . [0003] In principle, a liquid crystal display device is usually provided with a liquid crys...

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Problems solved by technology

[0008] Those skilled in the art understand that both the positive drive buffer (P_Buffer) and the negative drive buffer (N_Buffer) need to be implemented by providing a high power supply voltage through a charge pump (Charge Pump), and through the charge pump (Charge Pump), The input power supply voltage can be converted into positive high voltage and negative high voltage, for example, in the case of common electrode input normal common voltage (VCOM), when supplying, for example, 3V power supply voltage to a control unit, through the charge pump (Charge Pump ) can convert the 3V voltage into a positive 5-6V, which is what we call AVDD, so that the control unit can output a positive high voltage to the outside; on the contrary, the 3V voltage is converted into -5~-6V, which is what we call AVEE, so as to realize that the control unit outputs a negative high voltage to the outside, but those skilled in the art also know that such a charge pump structure requires a large number of on-chip capacitors, which will lead to a very large chip area and thus cost high power consumption

[0009] The problem with the above dot inversion mode is that for a control chip, in the case of N columns of liquid crystal display units, N / 2 P_Buffers and N / 2 N_Buffers are required at the same time, which leads to a large area of ​​the display control chip And it consumes a lot of power

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