Display device and method of driving the same

摘要

A display unit including pixels which display an image according to an image data signal transferred corresponding to each of the pixels, and a controller to receive and convert an external input video signal to transfer a luminance conversion data signal corresponding to the respective pixels. The controller includes: an input image data to receive the external input video signal; a scale factor calculation unit to determine at least one control factor for luminance conversion with respect to an input video signal corresponding to the pixels received from the input image data receiving unit; and a luminance data conversion unit to convert luminance data with respect to the respective pixels using the at least one determined control factor and to output the luminance conversion data signal.

主权项

1. A display device comprising:
a display unit including pixels to display an image according to an image data signal corresponding to each of the pixels; and a controller configured to receive and convert an input video signal to transfer a luminance conversion data signal corresponding to the respective pixels, wherein the controller comprises:
an input image data receiving unit configured to receive the input video signal from an external source;a high luminance region calculation unit configured to detect at least one first region emitting light with luminance of at least a reference value from the input video signal;a scale factor calculation unit configured to determine at least one control factor for luminance conversion of an input video signal corresponding to the pixels received from the input image data receiving unit; anda luminance data conversion unit configured to convert luminance data of the input video signal into a luminance conversion data signal using the at least one determined control factor, and to output the luminance conversion data signal, and wherein:
the at least one control factor comprises a parameter to determine a luminance variation ratio that varies within a non-recognition luminance range of a viewer during a time period when an image is displayed by the pixels;the high luminance region calculation unit is configured to separately transfer, to the scale factor calculation unit, luminance data of the input video signal corresponding to the detected first region and luminance data of the input video signal corresponding to a remaining background region, excluding the detected first region;the scale factor calculation unit is configured to determine a first control factor for luminance conversion of the first region, and to determine a second control factor for the background region; andthe luminance variation ratio of the first region is varied in synchronization with the luminance variation ratio of the background region when the first region is detected.