Liquid crystal display control system including storage means and d/a

Abstract

A liquid crystal display control system comprises a liquid crystal panel, a plurality of data latches for storing digital gray scale data, and a plurality of D/A converters for converting the outputs of the data latches into analog signals to be applied to the liquid crystal panel. The display data is digital signals, and the digital signals are processed up to the D/A converters just before the liquid crystal panel. Afterwards, the digital signals are converted into analog signals in the horizontal display period of relatively slow operating speed, and therefore analog circuits having many adjusting points may be reduced. Accordingly, the adjusting positions are reduced, and the adjusting process in mass production is simplified. In the case of a large screen display, in particular, although the data transfer speed is high, since the display data are digital signals, a high display quality is obtained by transferring the signals without deteriorating the display data. Moreover, the constitution is composed of digital circuits up to the D/A converters just before the liquid crystal panel, and therefore, the power consumption is small, and the economy and portability are excellent, while the mounting area is reduced, thereby realizing a liquid crystal display control system of small size and light weight.