Power voltage generator and display device having the same

A display device comprising:

• a display panel including pixels;
• a gate driver configured to provide gate voltages to the pixels;
• a data driver configured to provide data voltages to the pixels;
• a timing controller configured to control the gate driver and the data driver;
• and
• a power voltage generator configured to provide a power voltage for driving the pixels to the display panel,
• wherein the power voltage generator includes:
• an input voltage providing part configured to output an input voltage in response to a first switch control signal;
• an inductor configured to receive the input voltage to generate an inductor current and connected to an outputting part;
• the outputting part configured to generate the power voltage based on the inductor current and to generate a feedback voltage corresponding to the power voltage;
• an output sensing part configured to sense the power voltage in response to a second switch control signal and to generate an output sensing voltage;
• a peak voltage generator configured to generate a peak voltage based on the input voltage, set data corresponding to an output set voltage, and ripple data corresponding to a ripple set voltage;
• a first comparing part configured to generate a stop signal based on the output sensing voltage and the peak voltage;
• a second comparing part configured to generate a start signal based on the set data and the feedback voltage;
• and
• a switch controller configured to generate the first switch control signal and the second switch control signal based on the start signal and the stop signal.

A display device comprising:

• a display panel including pixels;
• a gate driver configured to provide gate voltages to the pixels;
• a data driver configured to provide data voltages to the pixels;
• a timing controller configured to control the gate driver and the data driver;
• and
• a power voltage generator configured to provide a driving voltage for driving the data driver to the data driver,
• wherein the power voltage generator includes:
• an input voltage providing part configured to output an input voltage in response to a first switch control signal;
• an inductor configured to receive the input voltage to generate an inductor current and connected to an outputting part;
• the outputting part configured to generate the driving voltage based on the inductor current and to generate a feedback voltage corresponding to the driving voltage;
• an output sensing part configured to sense the driving voltage in response to a second switch control signal and to generate an output sensing voltage;
• a peak voltage generator configured to generate a peak voltage based on the input voltage, set data corresponding to an output set voltage, and ripple data corresponding to a ripple set voltage;
• a first comparing part configured to generate a stop signal based on the output sensing voltage and the peak voltage;
• a second comparing part configured to generate a start signal based on the set data and the feedback voltage;
• and
• a switch controller configured to generate the first switch control signal and the second switch control signal based on the start signal and the stop signal.