Driving circuit of processing high dynamic range image signal and display device having the same

A display device comprising:

• a display panel;
• and
• a driving circuit configured to receive image signals and metadata and convert the image signals to data voltage signals based on the metadata to provide the data voltage signals to the display panel, the driving circuit comprising:
• a meta-data parsing circuit configured to parse the metadata and output the parsed metadata;
• an image analyzing and data processing circuit configured to analyze the image signals based on the parsed metadata and output a parameter and data signals;
• a reference voltage selector configured to output a reference voltage selection signal according to an electro-optical transfer function (EOTF), a brightness mapping operation, and a gamut mapping operation that are based on the parameter and the parsed metadata;
• a grayscale voltage generator configured to select a plurality of reference voltages in response to the reference voltage selection signal and generate a plurality of grayscale voltages based on the selected reference voltage;
• and
• an output circuit configured to convert the data signals to data voltage signals based on the grayscale voltages and provide the data voltage signals to the display panel.

A display device comprising:

• a display panel comprising a plurality of data lines, a plurality of gate lines, and a plurality of pixel each being connected to a corresponding data line among the data lines and a corresponding gate line among the gate lines;
• a timing controller configured to receive control signals, image signals, and metadata and output a first driving control signal, a second driving control signal, a reference voltage selection signal, and an image data signal, wherein the reference voltage selection signal is generated according to an electro-optical transfer function (EOTF), a brightness mapping operation, and a gamut mapping operation;
• a grayscale voltage generator configured to select a plurality of reference voltages in response to the reference voltage selection signal and generate grayscale voltages based on the selected reference voltages;
• a data driving circuit configured to convert the image data signal to data voltage signals based on the first driving control signal and the grayscale voltages and provide the data voltage signals to the data lines;
• and
• a gate driving circuit configured to drive the gate lines in response to the second driving control signal, wherein the timing controller parses the metadata and output the reference voltage selection signal based on the parsed metadata.