Display device and method of operating the display device to change luminance during a selected portion of a frame

A display device comprising:

• a display panel comprising:
• a plurality of pixel structures disposed between plural gate lines, plural data lines crossing with the gate lines and plural compensation gate lines, each pixel structure being configured to display a corresponding image pixel and each pixel structure including:
• a first switching element including two first input terminals and a first output terminal, the two first input terminals being connected to a corresponding one of the gate lines and a corresponding one of the data lines respectively;
• a liquid crystal capacitor including a driving electrode and a common electrode, the driving electrode being connected to the first output terminal of the first switching element;
• and
• a voltage lowering part that lowers a voltage of the liquid crystal capacitor to thereby lower a luminance of an image pixel produced by the pixel structure, where the voltage lowering part is responsive to a compensation gate signal provided to the voltage lowering part by a corresponding one of the compensation gate lines and where the voltage lowering part is configured to selectively lower but not extinguish a voltage of the liquid crystal capacitor so as to thus lower but not black out a luminance of the image pixel in response to the compensation gate signal delivered by said compensation gate line;
• a source driving block for outputting data signals to corresponding ones of the data lines;
• a gate driving block for outputting gate signals to corresponding ones of the gate lines;
• and
• a compensation gate lines driving block for outputting compensation gate signals to corresponding ones of the compensation gate lines, where the output compensation gate signals are delayed by predetermined durations relative to the corresponding gate signals,
• wherein the voltage lowering part comprises:
• a compensation capacitor connected so as to being selectively coupled in parallel with the liquid crystal capacitor;
• and
• a second switching element including two second input terminals and a second output terminal, the two second input terminals being connected to the compensation capacitor and a corresponding one of the compensation gate lines respectively, and the second output terminal being connected to the common electrode of the liquid crystal capacitor.

A method of driving a display device including a display panel comprising a plurality of pixel structures disposed between plural gate lines, plural data lines crossing with the gate lines and plural compensation gate lines, each pixel structure being configured to display a corresponding image pixel and each pixel structure including:

• a first switching element including two first input terminals connected respectively to a gate line and a data line, a liquid crystal capacitor including a first plate electrode connected to a first output terminal of the first switching element, a compensation capacitor connected for selective connection in parallel with the liquid crystal capacitor, and a second switching element including two second input terminals, a first of which is connected respectively to the compensation capacitor and a second of which is connected respectively to a corresponding one of the compensation gate lines, the second switching element further including a second output terminal connected to a second plate electrode of the liquid crystal capacitor, the method comprising:
• outputting data signals to corresponding ones of the data lines;
• outputting gate signals to corresponding ones of the gate lines;
• and
• outputting compensation gate signals to corresponding ones of the compensation gate lines, where the compensation gate signals are delayed by predetermined durations relative to their corresponding gate signals,
• wherein the outputting of the compensation gate signals includes:
• turning on the second switching element in response to the compensation gate signal;
• and
• reducing voltage across the liquid crystal capacitor from the initial pixel voltage to a nonzero compensation pixel voltage by drawing charge to the compensation capacitor when the second switching element is turned on.