Patent ID: 6151005
Filing Date: 2000-11-21
Classification: G09G

Abstract:
An X driver circuit into which display data to be displayed on a liquid-crystal panel is supplied, and which transmits a voltage corresponding to said display data to each data line of the liquid crystal panel, said X driver circuit comprising:a voltage divider circuit provided for each data line, by which n voltages having n different voltage levels externally supplied are divided into m voltages having m different voltage levels (n<m, n and m are integers larger than 1) corresponding to said display data;said voltage divider circuit including:a first selector circuit which is supplied with the n voltages of n different voltage levels, and which selects and transmits two of the supplied n voltages,a first control circuit which controls said first selector circuit in accordance with said display data so as to select the two voltages,an output circuit which transmits either of a plurality of divisional voltages produced from the selected voltages and the supplied voltages,a second selector circuit which selects and transmits any of said plurality of divisional voltages and said supplied voltages, anda second control circuit which controls said second selector circuit under either of a voltage selection command externally supplied and a voltage selection command internally generated, so as to select the voltage to-be-transmitted from either of said supplied voltages and said plurality of divisional voltages corresponding to said display data;wherein said voltage selection command is a command for selecting a higher one of said two voltages selected by said first selector circuit, during a first period, while it is a command for selecting the divisional voltage corresponding to said display data, during a second period subsequent to said first period.