Digital data driver and display device using the same

摘要

A digital data driver including a receiving unit and a digital-to-analog (D/A) converting unit is provided. The D/A converting unit is used to convert N digital data outputted from the receiving unit into corresponding N analog data. The D/A converting unit includes a grey-level voltage generator and K sub D/A converting units. The grey-level voltage generator provides 2^M grey-level voltages. The i^th sub D/A converting unit includes 2^M buffers and $\frac{N}{K}D/A$ converters. In which, each buffer receives and outputs a corresponding grey-level voltage. The j^th D/A converter receives the ${\left[\left(i-1\right)x\frac{N}{K}+j\right]}^{\mathrm{th}}$ digital data, and selects and outputs one of the grey-level voltages that passed the buffers as the ${\left[\left(i-1\right)x\frac{N}{K}+j\right]}^{\mathrm{th}}$ analog data according to the ${\left[\left(i-1\right)x\frac{N}{K}+j\right]}^{\mathrm{th}}$ digital data, where N, K, $\frac{N}{K},$ i and j are the positive integers, $1<=i<=K\mathrm{and}1<=j<=\frac{N}{K}.$