IMAGE PROCESSING CIRCUIT, IMAGE PROCESSING METHOD, AND DISPLAY DEVICE USING THE SAME

摘要

Disclosed are an image processing circuit and image processing method which is capable of enhancing gray level presentation, and a display device using the same. The image processing circuit and image processing method performs a differential extension of each gray level to a higher gray level with respect to a perceived brightness picture level (PBPL) reflecting a distribution of high gray levels of the input image, and then overdrives a light emitting device in the region of high gray levels higher than or equal to the threshold gray level.

主权项

1. An image processing circuit comprising:
a perceived brightness calculator that calculates a perceived darkness picture level and a perceived brightness picture level indicating a level of brightness of an input image; a differential shifter that shifts the input image to lower gray levels based on the perceived darkness picture level; and a differential extension unit that extends the input image shifted to the lower gray levels to higher gray levels by applying a differential gain to each gray level of the input image based on the perceived brightness picture level.