Source driver and digital-to-analog converter thereof
AssigneeHimax Technologies Limited
InventorYu-Jui Chang
Life of this patent
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Abstract
A source driver and a digital-to-analog converter (DAC) thereof are provided. The DAC converts an input data into an analog voltage. The DAC includes a reference voltage generation unit, a switch unit, and a selection unit. The reference voltage generation unit provides a plurality of voltage levels. The switch unit is coupled to the reference voltage generation unit and determines whether to output the voltage levels, wherein the switch unit is turned off during a data conversion period of the input data. The selection unit is coupled to the reference voltage generation unit via the switch unit, and the selection unit selects one of the voltage levels output by the switch unit according to the input data, wherein the selected voltage level is served as the analog voltage output by the DAC.
Claims14
A digital-to-analog converter (DAC), for converting an input data into an analog voltage, the DAC comprising:
- a reference voltage generation unit, providing a plurality of voltage levels;
- a switch unit, coupled to the reference voltage generation unit, for determining whether to output the voltage levels, wherein the switch unit is turned off during a data conversion period of the input data;
- and
- a selection unit, coupled to the reference voltage generation unit via the switch unit, the selection unit selecting one of the voltage levels output by the switch unit according to the input data, wherein the selected voltage level is served as the analog voltage output by the DAC.
A source driver, comprising:
- a line latch, updating an input data according to a line latch signal;
- and
- a DAC, converting the input data into an analog voltage, the DAC comprising:
- a reference voltage generation unit, providing a plurality of voltage levels;
- a switch unit, coupled to the reference voltage generation unit, for determining whether to output the voltage levels according to the line latch signal, wherein the switch unit is turned off during a data conversion period of the input data;
- and
- a selection unit, coupled to the reference voltage generation unit via the switch unit, the selection unit selecting one of the voltage levels output by the switch unit according to the input data, wherein the selected voltage level is served as the analog voltage output by the DAC.
Dependencies are inferred from the claim text.