TFT-LCD (Thin Film Transistor-Liquid Crystal Display) drive circuit

Abstract

The invention discloses a TFT-LCD (Thin Film Transistor-Liquid Crystal Display) drive circuit comprising a public electrode signal generating module and a compensating circuit, wherein the public electrode signal generating module is used for generating public electrode signals; the compensating circuit is connected with the public electrode signal generating module and an electrode which is arranged on a panel and is used for receiving the public electrode signals, the compensating circuit is used for compensating the voltage of the electrode used for receiving the public electrode signals so that the voltage of the electrodes for receiving the public electrode signals in different positions on the panel achieves respective target voltage. The TFT-LCD drive circuit can reduce TFT-LCD picture scintillation and residual direct-current components.

Description

technical field [0001] The present invention relates to liquid crystal display drive technology, in particular to a thin film transistor liquid crystal display (Thin Film Transistor Liquid Crystal Display, TFT-LCD for short) drive circuit. Background technique [0002] TFT-LCD mainly includes a liquid crystal panel, a gate drive circuit, a source drive circuit, a timing controller and a backlight source. The liquid crystal panel is composed of an array substrate, a color filter substrate, and liquid crystals arranged in between. The data lines and gate lines are formed on the array substrate, and the thin film transistor (Thin Film Transistor, TFT for short) arranged at the intersection of the gate lines and the data lines is used for The data signal is transmitted to the pixel electrode of the array substrate. Such as figure 1 Shown is a schematic structural diagram of a TFT-LCD drive circuit in the prior art, a timing controller (Timing Controller, TCON for short) 1 is u...

AI Technical Summary

Problems solved by technology

Although figure 2 The line used to represent the common electrode signal passes through the source drive circuit 2, but in fact each source drive sub-circuit in the source drive circuit does not participate in the processing of the common electrode signal

[0005] figure 2 The problem in the driving method shown in is that the voltages of the signals input on the electrodes for receiving the common electrode signals on the panel are the same. In fact, due to the different loads on the panel, different positions on the LCD panel need The voltage of the common electrode signal is different. For example, the common electrode signal required by the area covered by the data line driven by the first source drive subcircuit may be a 5.8 volt signal, and the data line covered by the second source drive subcircuit is responsible for driving The common electrode signal required by the area may be a 5.5-volt signal, and the common electrode signal required by the area covered by the data line driven by the third source driver sub-circuit may be a 5.3-volt signal

If the method in the prior art is adopted, the voltages of the signals input on each electrode for receiving the common electrode signal on the panel are all the same, which will cause the TFT-LCD screen to flicker (flicker), and will cause residual DC components (in the art Usually called residual DC) in the existence, affect the screen display

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