Impedance conversion circuit, drive circuit, and control method therefor

Abstract

An impedance conversion circuit for outputting a voltage corresponding to (j+K) (j, k: positive integers) bits of gray scale data, including: an input for receiving an input voltage selected from 2 levels of voltages in accordance with high j bit(s) of the gray scale data; and an output for outputting an output voltage corresponding to low k bit(s) of the gray scale data from 2 levels of voltages obtained by changing a potential of the input voltage.

Description

technical field [0001] The invention relates to an impedance transformation circuit, a drive circuit and a control method for the impedance transformation circuit. Background technique [0002] As we all know, as liquid crystal panels (electro-optical devices in a broad sense) used in electronic devices such as mobile phones, there are simple matrix liquid crystal panels, thin film transistors (ThinFilm Transistor: hereinafter, referred to as TFT) and other active matrix devices using switching elements. LCD panel. [0003] Compared with the active matrix method, the simple matrix method is easier to achieve lower power consumption, but it is difficult to realize multi-color and animation display. On the other hand, the active matrix method facilitates multi-color and animation display, but it is difficult to achieve low power consumption. [0004] In recent years, in portable electronic devices such as mobile phones, in order to provide high-quality images, there is an in...

AI Technical Summary

Problems solved by technology

Therefore, with the multi-gray scale, the proportion of the wiring area of ​​the gray scale voltage signal line group is increasing, and the increase in the design area leads to high cost.

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