DIGITAL-TO-ANALOG CONVERTER, PROGRAMMABLE GAMMA CORRECTION BUFFER CIRCUIT AND DISPLAY APPARATUS

摘要

A digital-to-analog converter is for outputting a first output analog voltage according to a N-bit first digital signal or outputting a second output analog voltage according to a N-bit second digital signal and includes: a first voltage generator coupled between first and second reference voltages and for generating 2N first analog voltage between the first and second reference voltages, a first voltage selector for selecting the first output analog voltage from the 2N first analog voltage according to the N-bit first digital signal, a second voltage generator coupled to second and third reference voltages and for generating 2N second analog voltages between the second and third reference voltages, a second voltage selector for selecting the second output analog voltage from the 2N second analog voltages according to the N-bit second digital signal. A programmable gamma correction buffer circuit and a display apparatus also are provided.

主权项

1. A digital-to-analog converter for outputting a first output analog voltage according to a N-bit first digital signal or outputting a second output analog voltage according to a N-bit second digital signal, the digital-to-analog converter comprising:
a first voltage generator, coupled between a first reference voltage and a second reference voltage and configured for generating 2N first analog voltage between the first reference voltage and the second reference voltage; a first voltage selector, coupled to the first voltage generator and configured for selecting the first output analog voltage from the 2N first analog voltages generated by the first voltage generator according to the N-bit first digital signal; a second voltage generator, coupled between the second reference voltage and a third reference voltage and configured for generating 2N second analog voltage between the second reference voltage and the third reference voltage; a second voltage selector, coupled to the second voltage generator and configured for selecting the second output analog voltage from the 2N second analog voltages generated by the second voltage generator according to the N-bit second digital signal.