| 摘要 |
A driver and an OLED(Organic Light Emitting Display) device using the same are provided to output 28 gray scale voltages through seven voltage dividers by generating four gray scale voltages in one data voltage generator. A driver includes first and second decoders(251,254), first and second selectors(255,254), a switch unit(253), and a data voltage generator(256). The first decoder outputs a first decoding signal using a higher bit of a digital data signal. The first selector generates a first selection signal and a first subselection signal corresponding to the first decoding signal. The switch unit selects first and second reference voltages using the first selection signal and the first subselection signal. The second decoder outputs a second decoding signal using a lower bit of the digital data signal. The second selector generates a second selection signal and a second subselection signal corresponding to the second decoding signal. The data voltage generator includes first and second voltage dividers. The first voltage divider receives the first and second reference voltages and generates plural data voltages through plural resistor strings based on the second selection signal and the second subselection signal. The second voltage divider includes resistor strings for generating data voltages based on the second selection signal and the second subselection signal.
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